4 * This code is licensed under the GNU GPL v2 or later.
6 * SPDX-License-Identifier: GPL-2.0-or-later
8 #include "qemu/osdep.h"
9 #include "qemu/units.h"
10 #include "target/arm/idau.h"
13 #include "internals.h"
14 #include "exec/gdbstub.h"
15 #include "exec/helper-proto.h"
16 #include "qemu/host-utils.h"
17 #include "sysemu/sysemu.h"
18 #include "qemu/bitops.h"
19 #include "qemu/crc32c.h"
20 #include "qemu/qemu-print.h"
21 #include "exec/exec-all.h"
22 #include "exec/cpu_ldst.h"
23 #include <zlib.h> /* For crc32 */
24 #include "hw/semihosting/semihost.h"
25 #include "sysemu/cpus.h"
26 #include "sysemu/kvm.h"
27 #include "qemu/range.h"
28 #include "qapi/qapi-commands-machine-target.h"
29 #include "qapi/error.h"
30 #include "qemu/guest-random.h"
35 #define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
37 #ifndef CONFIG_USER_ONLY
39 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
40 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
41 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
42 target_ulong
*page_size_ptr
,
43 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
);
46 static void switch_mode(CPUARMState
*env
, int mode
);
48 static int vfp_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
52 /* VFP data registers are always little-endian. */
53 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
55 stq_le_p(buf
, *aa32_vfp_dreg(env
, reg
));
58 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
59 /* Aliases for Q regs. */
62 uint64_t *q
= aa32_vfp_qreg(env
, reg
- 32);
64 stq_le_p(buf
+ 8, q
[1]);
68 switch (reg
- nregs
) {
69 case 0: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPSID
]); return 4;
70 case 1: stl_p(buf
, vfp_get_fpscr(env
)); return 4;
71 case 2: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPEXC
]); return 4;
76 static int vfp_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
80 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
82 *aa32_vfp_dreg(env
, reg
) = ldq_le_p(buf
);
85 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
88 uint64_t *q
= aa32_vfp_qreg(env
, reg
- 32);
90 q
[1] = ldq_le_p(buf
+ 8);
94 switch (reg
- nregs
) {
95 case 0: env
->vfp
.xregs
[ARM_VFP_FPSID
] = ldl_p(buf
); return 4;
96 case 1: vfp_set_fpscr(env
, ldl_p(buf
)); return 4;
97 case 2: env
->vfp
.xregs
[ARM_VFP_FPEXC
] = ldl_p(buf
) & (1 << 30); return 4;
102 static int aarch64_fpu_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
106 /* 128 bit FP register */
108 uint64_t *q
= aa64_vfp_qreg(env
, reg
);
110 stq_le_p(buf
+ 8, q
[1]);
115 stl_p(buf
, vfp_get_fpsr(env
));
119 stl_p(buf
, vfp_get_fpcr(env
));
126 static int aarch64_fpu_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
130 /* 128 bit FP register */
132 uint64_t *q
= aa64_vfp_qreg(env
, reg
);
133 q
[0] = ldq_le_p(buf
);
134 q
[1] = ldq_le_p(buf
+ 8);
139 vfp_set_fpsr(env
, ldl_p(buf
));
143 vfp_set_fpcr(env
, ldl_p(buf
));
150 static uint64_t raw_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
152 assert(ri
->fieldoffset
);
153 if (cpreg_field_is_64bit(ri
)) {
154 return CPREG_FIELD64(env
, ri
);
156 return CPREG_FIELD32(env
, ri
);
160 static void raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
163 assert(ri
->fieldoffset
);
164 if (cpreg_field_is_64bit(ri
)) {
165 CPREG_FIELD64(env
, ri
) = value
;
167 CPREG_FIELD32(env
, ri
) = value
;
171 static void *raw_ptr(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
173 return (char *)env
+ ri
->fieldoffset
;
176 uint64_t read_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
178 /* Raw read of a coprocessor register (as needed for migration, etc). */
179 if (ri
->type
& ARM_CP_CONST
) {
180 return ri
->resetvalue
;
181 } else if (ri
->raw_readfn
) {
182 return ri
->raw_readfn(env
, ri
);
183 } else if (ri
->readfn
) {
184 return ri
->readfn(env
, ri
);
186 return raw_read(env
, ri
);
190 static void write_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
193 /* Raw write of a coprocessor register (as needed for migration, etc).
194 * Note that constant registers are treated as write-ignored; the
195 * caller should check for success by whether a readback gives the
198 if (ri
->type
& ARM_CP_CONST
) {
200 } else if (ri
->raw_writefn
) {
201 ri
->raw_writefn(env
, ri
, v
);
202 } else if (ri
->writefn
) {
203 ri
->writefn(env
, ri
, v
);
205 raw_write(env
, ri
, v
);
209 static int arm_gdb_get_sysreg(CPUARMState
*env
, uint8_t *buf
, int reg
)
211 ARMCPU
*cpu
= env_archcpu(env
);
212 const ARMCPRegInfo
*ri
;
215 key
= cpu
->dyn_xml
.cpregs_keys
[reg
];
216 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, key
);
218 if (cpreg_field_is_64bit(ri
)) {
219 return gdb_get_reg64(buf
, (uint64_t)read_raw_cp_reg(env
, ri
));
221 return gdb_get_reg32(buf
, (uint32_t)read_raw_cp_reg(env
, ri
));
227 static int arm_gdb_set_sysreg(CPUARMState
*env
, uint8_t *buf
, int reg
)
232 static bool raw_accessors_invalid(const ARMCPRegInfo
*ri
)
234 /* Return true if the regdef would cause an assertion if you called
235 * read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a
236 * program bug for it not to have the NO_RAW flag).
237 * NB that returning false here doesn't necessarily mean that calling
238 * read/write_raw_cp_reg() is safe, because we can't distinguish "has
239 * read/write access functions which are safe for raw use" from "has
240 * read/write access functions which have side effects but has forgotten
241 * to provide raw access functions".
242 * The tests here line up with the conditions in read/write_raw_cp_reg()
243 * and assertions in raw_read()/raw_write().
245 if ((ri
->type
& ARM_CP_CONST
) ||
247 ((ri
->raw_writefn
|| ri
->writefn
) && (ri
->raw_readfn
|| ri
->readfn
))) {
253 bool write_cpustate_to_list(ARMCPU
*cpu
, bool kvm_sync
)
255 /* Write the coprocessor state from cpu->env to the (index,value) list. */
259 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
260 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
261 const ARMCPRegInfo
*ri
;
264 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
269 if (ri
->type
& ARM_CP_NO_RAW
) {
273 newval
= read_raw_cp_reg(&cpu
->env
, ri
);
276 * Only sync if the previous list->cpustate sync succeeded.
277 * Rather than tracking the success/failure state for every
278 * item in the list, we just recheck "does the raw write we must
279 * have made in write_list_to_cpustate() read back OK" here.
281 uint64_t oldval
= cpu
->cpreg_values
[i
];
283 if (oldval
== newval
) {
287 write_raw_cp_reg(&cpu
->env
, ri
, oldval
);
288 if (read_raw_cp_reg(&cpu
->env
, ri
) != oldval
) {
292 write_raw_cp_reg(&cpu
->env
, ri
, newval
);
294 cpu
->cpreg_values
[i
] = newval
;
299 bool write_list_to_cpustate(ARMCPU
*cpu
)
304 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
305 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
306 uint64_t v
= cpu
->cpreg_values
[i
];
307 const ARMCPRegInfo
*ri
;
309 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
314 if (ri
->type
& ARM_CP_NO_RAW
) {
317 /* Write value and confirm it reads back as written
318 * (to catch read-only registers and partially read-only
319 * registers where the incoming migration value doesn't match)
321 write_raw_cp_reg(&cpu
->env
, ri
, v
);
322 if (read_raw_cp_reg(&cpu
->env
, ri
) != v
) {
329 static void add_cpreg_to_list(gpointer key
, gpointer opaque
)
331 ARMCPU
*cpu
= opaque
;
333 const ARMCPRegInfo
*ri
;
335 regidx
= *(uint32_t *)key
;
336 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
338 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
339 cpu
->cpreg_indexes
[cpu
->cpreg_array_len
] = cpreg_to_kvm_id(regidx
);
340 /* The value array need not be initialized at this point */
341 cpu
->cpreg_array_len
++;
345 static void count_cpreg(gpointer key
, gpointer opaque
)
347 ARMCPU
*cpu
= opaque
;
349 const ARMCPRegInfo
*ri
;
351 regidx
= *(uint32_t *)key
;
352 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
354 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
355 cpu
->cpreg_array_len
++;
359 static gint
cpreg_key_compare(gconstpointer a
, gconstpointer b
)
361 uint64_t aidx
= cpreg_to_kvm_id(*(uint32_t *)a
);
362 uint64_t bidx
= cpreg_to_kvm_id(*(uint32_t *)b
);
373 void init_cpreg_list(ARMCPU
*cpu
)
375 /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
376 * Note that we require cpreg_tuples[] to be sorted by key ID.
381 keys
= g_hash_table_get_keys(cpu
->cp_regs
);
382 keys
= g_list_sort(keys
, cpreg_key_compare
);
384 cpu
->cpreg_array_len
= 0;
386 g_list_foreach(keys
, count_cpreg
, cpu
);
388 arraylen
= cpu
->cpreg_array_len
;
389 cpu
->cpreg_indexes
= g_new(uint64_t, arraylen
);
390 cpu
->cpreg_values
= g_new(uint64_t, arraylen
);
391 cpu
->cpreg_vmstate_indexes
= g_new(uint64_t, arraylen
);
392 cpu
->cpreg_vmstate_values
= g_new(uint64_t, arraylen
);
393 cpu
->cpreg_vmstate_array_len
= cpu
->cpreg_array_len
;
394 cpu
->cpreg_array_len
= 0;
396 g_list_foreach(keys
, add_cpreg_to_list
, cpu
);
398 assert(cpu
->cpreg_array_len
== arraylen
);
404 * Some registers are not accessible if EL3.NS=0 and EL3 is using AArch32 but
405 * they are accessible when EL3 is using AArch64 regardless of EL3.NS.
407 * access_el3_aa32ns: Used to check AArch32 register views.
408 * access_el3_aa32ns_aa64any: Used to check both AArch32/64 register views.
410 static CPAccessResult
access_el3_aa32ns(CPUARMState
*env
,
411 const ARMCPRegInfo
*ri
,
414 bool secure
= arm_is_secure_below_el3(env
);
416 assert(!arm_el_is_aa64(env
, 3));
418 return CP_ACCESS_TRAP_UNCATEGORIZED
;
423 static CPAccessResult
access_el3_aa32ns_aa64any(CPUARMState
*env
,
424 const ARMCPRegInfo
*ri
,
427 if (!arm_el_is_aa64(env
, 3)) {
428 return access_el3_aa32ns(env
, ri
, isread
);
433 /* Some secure-only AArch32 registers trap to EL3 if used from
434 * Secure EL1 (but are just ordinary UNDEF in other non-EL3 contexts).
435 * Note that an access from Secure EL1 can only happen if EL3 is AArch64.
436 * We assume that the .access field is set to PL1_RW.
438 static CPAccessResult
access_trap_aa32s_el1(CPUARMState
*env
,
439 const ARMCPRegInfo
*ri
,
442 if (arm_current_el(env
) == 3) {
445 if (arm_is_secure_below_el3(env
)) {
446 return CP_ACCESS_TRAP_EL3
;
448 /* This will be EL1 NS and EL2 NS, which just UNDEF */
449 return CP_ACCESS_TRAP_UNCATEGORIZED
;
452 /* Check for traps to "powerdown debug" registers, which are controlled
455 static CPAccessResult
access_tdosa(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
458 int el
= arm_current_el(env
);
459 bool mdcr_el2_tdosa
= (env
->cp15
.mdcr_el2
& MDCR_TDOSA
) ||
460 (env
->cp15
.mdcr_el2
& MDCR_TDE
) ||
461 (arm_hcr_el2_eff(env
) & HCR_TGE
);
463 if (el
< 2 && mdcr_el2_tdosa
&& !arm_is_secure_below_el3(env
)) {
464 return CP_ACCESS_TRAP_EL2
;
466 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDOSA
)) {
467 return CP_ACCESS_TRAP_EL3
;
472 /* Check for traps to "debug ROM" registers, which are controlled
473 * by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3.
475 static CPAccessResult
access_tdra(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
478 int el
= arm_current_el(env
);
479 bool mdcr_el2_tdra
= (env
->cp15
.mdcr_el2
& MDCR_TDRA
) ||
480 (env
->cp15
.mdcr_el2
& MDCR_TDE
) ||
481 (arm_hcr_el2_eff(env
) & HCR_TGE
);
483 if (el
< 2 && mdcr_el2_tdra
&& !arm_is_secure_below_el3(env
)) {
484 return CP_ACCESS_TRAP_EL2
;
486 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
487 return CP_ACCESS_TRAP_EL3
;
492 /* Check for traps to general debug registers, which are controlled
493 * by MDCR_EL2.TDA for EL2 and MDCR_EL3.TDA for EL3.
495 static CPAccessResult
access_tda(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
498 int el
= arm_current_el(env
);
499 bool mdcr_el2_tda
= (env
->cp15
.mdcr_el2
& MDCR_TDA
) ||
500 (env
->cp15
.mdcr_el2
& MDCR_TDE
) ||
501 (arm_hcr_el2_eff(env
) & HCR_TGE
);
503 if (el
< 2 && mdcr_el2_tda
&& !arm_is_secure_below_el3(env
)) {
504 return CP_ACCESS_TRAP_EL2
;
506 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
507 return CP_ACCESS_TRAP_EL3
;
512 /* Check for traps to performance monitor registers, which are controlled
513 * by MDCR_EL2.TPM for EL2 and MDCR_EL3.TPM for EL3.
515 static CPAccessResult
access_tpm(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
518 int el
= arm_current_el(env
);
520 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
521 && !arm_is_secure_below_el3(env
)) {
522 return CP_ACCESS_TRAP_EL2
;
524 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
525 return CP_ACCESS_TRAP_EL3
;
530 static void dacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
532 ARMCPU
*cpu
= env_archcpu(env
);
534 raw_write(env
, ri
, value
);
535 tlb_flush(CPU(cpu
)); /* Flush TLB as domain not tracked in TLB */
538 static void fcse_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
540 ARMCPU
*cpu
= env_archcpu(env
);
542 if (raw_read(env
, ri
) != value
) {
543 /* Unlike real hardware the qemu TLB uses virtual addresses,
544 * not modified virtual addresses, so this causes a TLB flush.
547 raw_write(env
, ri
, value
);
551 static void contextidr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
554 ARMCPU
*cpu
= env_archcpu(env
);
556 if (raw_read(env
, ri
) != value
&& !arm_feature(env
, ARM_FEATURE_PMSA
)
557 && !extended_addresses_enabled(env
)) {
558 /* For VMSA (when not using the LPAE long descriptor page table
559 * format) this register includes the ASID, so do a TLB flush.
560 * For PMSA it is purely a process ID and no action is needed.
564 raw_write(env
, ri
, value
);
567 /* IS variants of TLB operations must affect all cores */
568 static void tlbiall_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
571 CPUState
*cs
= env_cpu(env
);
573 tlb_flush_all_cpus_synced(cs
);
576 static void tlbiasid_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
579 CPUState
*cs
= env_cpu(env
);
581 tlb_flush_all_cpus_synced(cs
);
584 static void tlbimva_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
587 CPUState
*cs
= env_cpu(env
);
589 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
592 static void tlbimvaa_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
595 CPUState
*cs
= env_cpu(env
);
597 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
601 * Non-IS variants of TLB operations are upgraded to
602 * IS versions if we are at NS EL1 and HCR_EL2.FB is set to
603 * force broadcast of these operations.
605 static bool tlb_force_broadcast(CPUARMState
*env
)
607 return (env
->cp15
.hcr_el2
& HCR_FB
) &&
608 arm_current_el(env
) == 1 && arm_is_secure_below_el3(env
);
611 static void tlbiall_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
614 /* Invalidate all (TLBIALL) */
615 ARMCPU
*cpu
= env_archcpu(env
);
617 if (tlb_force_broadcast(env
)) {
618 tlbiall_is_write(env
, NULL
, value
);
625 static void tlbimva_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
628 /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
629 ARMCPU
*cpu
= env_archcpu(env
);
631 if (tlb_force_broadcast(env
)) {
632 tlbimva_is_write(env
, NULL
, value
);
636 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
639 static void tlbiasid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
642 /* Invalidate by ASID (TLBIASID) */
643 ARMCPU
*cpu
= env_archcpu(env
);
645 if (tlb_force_broadcast(env
)) {
646 tlbiasid_is_write(env
, NULL
, value
);
653 static void tlbimvaa_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
656 /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
657 ARMCPU
*cpu
= env_archcpu(env
);
659 if (tlb_force_broadcast(env
)) {
660 tlbimvaa_is_write(env
, NULL
, value
);
664 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
667 static void tlbiall_nsnh_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
670 CPUState
*cs
= env_cpu(env
);
672 tlb_flush_by_mmuidx(cs
,
673 ARMMMUIdxBit_S12NSE1
|
674 ARMMMUIdxBit_S12NSE0
|
678 static void tlbiall_nsnh_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
681 CPUState
*cs
= env_cpu(env
);
683 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
684 ARMMMUIdxBit_S12NSE1
|
685 ARMMMUIdxBit_S12NSE0
|
689 static void tlbiipas2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
692 /* Invalidate by IPA. This has to invalidate any structures that
693 * contain only stage 2 translation information, but does not need
694 * to apply to structures that contain combined stage 1 and stage 2
695 * translation information.
696 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
698 CPUState
*cs
= env_cpu(env
);
701 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
705 pageaddr
= sextract64(value
<< 12, 0, 40);
707 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
710 static void tlbiipas2_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
713 CPUState
*cs
= env_cpu(env
);
716 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
720 pageaddr
= sextract64(value
<< 12, 0, 40);
722 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
726 static void tlbiall_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
729 CPUState
*cs
= env_cpu(env
);
731 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
734 static void tlbiall_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
737 CPUState
*cs
= env_cpu(env
);
739 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
742 static void tlbimva_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
745 CPUState
*cs
= env_cpu(env
);
746 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
748 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
751 static void tlbimva_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
754 CPUState
*cs
= env_cpu(env
);
755 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
757 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
761 static const ARMCPRegInfo cp_reginfo
[] = {
762 /* Define the secure and non-secure FCSE identifier CP registers
763 * separately because there is no secure bank in V8 (no _EL3). This allows
764 * the secure register to be properly reset and migrated. There is also no
765 * v8 EL1 version of the register so the non-secure instance stands alone.
768 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
769 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
770 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_ns
),
771 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
772 { .name
= "FCSEIDR_S",
773 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
774 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
775 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_s
),
776 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
777 /* Define the secure and non-secure context identifier CP registers
778 * separately because there is no secure bank in V8 (no _EL3). This allows
779 * the secure register to be properly reset and migrated. In the
780 * non-secure case, the 32-bit register will have reset and migration
781 * disabled during registration as it is handled by the 64-bit instance.
783 { .name
= "CONTEXTIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
784 .opc0
= 3, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
785 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
786 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_el
[1]),
787 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
788 { .name
= "CONTEXTIDR_S", .state
= ARM_CP_STATE_AA32
,
789 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
790 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
791 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_s
),
792 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
796 static const ARMCPRegInfo not_v8_cp_reginfo
[] = {
797 /* NB: Some of these registers exist in v8 but with more precise
798 * definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
800 /* MMU Domain access control / MPU write buffer control */
802 .cp
= 15, .opc1
= CP_ANY
, .crn
= 3, .crm
= CP_ANY
, .opc2
= CP_ANY
,
803 .access
= PL1_RW
, .resetvalue
= 0,
804 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
805 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
806 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
807 /* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs.
808 * For v6 and v5, these mappings are overly broad.
810 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 0,
811 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
812 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 1,
813 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
814 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 4,
815 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
816 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 8,
817 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
818 /* Cache maintenance ops; some of this space may be overridden later. */
819 { .name
= "CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
820 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
821 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
},
825 static const ARMCPRegInfo not_v6_cp_reginfo
[] = {
826 /* Not all pre-v6 cores implemented this WFI, so this is slightly
829 { .name
= "WFI_v5", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= 2,
830 .access
= PL1_W
, .type
= ARM_CP_WFI
},
834 static const ARMCPRegInfo not_v7_cp_reginfo
[] = {
835 /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
836 * is UNPREDICTABLE; we choose to NOP as most implementations do).
838 { .name
= "WFI_v6", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
839 .access
= PL1_W
, .type
= ARM_CP_WFI
},
840 /* L1 cache lockdown. Not architectural in v6 and earlier but in practice
841 * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
842 * OMAPCP will override this space.
844 { .name
= "DLOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 0,
845 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_data
),
847 { .name
= "ILOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 1,
848 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_insn
),
850 /* v6 doesn't have the cache ID registers but Linux reads them anyway */
851 { .name
= "DUMMY", .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= CP_ANY
,
852 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
854 /* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR;
855 * implementing it as RAZ means the "debug architecture version" bits
856 * will read as a reserved value, which should cause Linux to not try
857 * to use the debug hardware.
859 { .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
860 .access
= PL0_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
861 /* MMU TLB control. Note that the wildcarding means we cover not just
862 * the unified TLB ops but also the dside/iside/inner-shareable variants.
864 { .name
= "TLBIALL", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
865 .opc1
= CP_ANY
, .opc2
= 0, .access
= PL1_W
, .writefn
= tlbiall_write
,
866 .type
= ARM_CP_NO_RAW
},
867 { .name
= "TLBIMVA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
868 .opc1
= CP_ANY
, .opc2
= 1, .access
= PL1_W
, .writefn
= tlbimva_write
,
869 .type
= ARM_CP_NO_RAW
},
870 { .name
= "TLBIASID", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
871 .opc1
= CP_ANY
, .opc2
= 2, .access
= PL1_W
, .writefn
= tlbiasid_write
,
872 .type
= ARM_CP_NO_RAW
},
873 { .name
= "TLBIMVAA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
874 .opc1
= CP_ANY
, .opc2
= 3, .access
= PL1_W
, .writefn
= tlbimvaa_write
,
875 .type
= ARM_CP_NO_RAW
},
876 { .name
= "PRRR", .cp
= 15, .crn
= 10, .crm
= 2,
877 .opc1
= 0, .opc2
= 0, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
878 { .name
= "NMRR", .cp
= 15, .crn
= 10, .crm
= 2,
879 .opc1
= 0, .opc2
= 1, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
883 static void cpacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
888 /* In ARMv8 most bits of CPACR_EL1 are RES0. */
889 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
890 /* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
891 * ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
892 * TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
894 if (arm_feature(env
, ARM_FEATURE_VFP
)) {
895 /* VFP coprocessor: cp10 & cp11 [23:20] */
896 mask
|= (1 << 31) | (1 << 30) | (0xf << 20);
898 if (!arm_feature(env
, ARM_FEATURE_NEON
)) {
899 /* ASEDIS [31] bit is RAO/WI */
903 /* VFPv3 and upwards with NEON implement 32 double precision
904 * registers (D0-D31).
906 if (!arm_feature(env
, ARM_FEATURE_NEON
) ||
907 !arm_feature(env
, ARM_FEATURE_VFP3
)) {
908 /* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
916 * For A-profile AArch32 EL3 (but not M-profile secure mode), if NSACR.CP10
917 * is 0 then CPACR.{CP11,CP10} ignore writes and read as 0b00.
919 if (arm_feature(env
, ARM_FEATURE_EL3
) && !arm_el_is_aa64(env
, 3) &&
920 !arm_is_secure(env
) && !extract32(env
->cp15
.nsacr
, 10, 1)) {
921 value
&= ~(0xf << 20);
922 value
|= env
->cp15
.cpacr_el1
& (0xf << 20);
925 env
->cp15
.cpacr_el1
= value
;
928 static uint64_t cpacr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
931 * For A-profile AArch32 EL3 (but not M-profile secure mode), if NSACR.CP10
932 * is 0 then CPACR.{CP11,CP10} ignore writes and read as 0b00.
934 uint64_t value
= env
->cp15
.cpacr_el1
;
936 if (arm_feature(env
, ARM_FEATURE_EL3
) && !arm_el_is_aa64(env
, 3) &&
937 !arm_is_secure(env
) && !extract32(env
->cp15
.nsacr
, 10, 1)) {
938 value
&= ~(0xf << 20);
944 static void cpacr_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
946 /* Call cpacr_write() so that we reset with the correct RAO bits set
947 * for our CPU features.
949 cpacr_write(env
, ri
, 0);
952 static CPAccessResult
cpacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
955 if (arm_feature(env
, ARM_FEATURE_V8
)) {
956 /* Check if CPACR accesses are to be trapped to EL2 */
957 if (arm_current_el(env
) == 1 &&
958 (env
->cp15
.cptr_el
[2] & CPTR_TCPAC
) && !arm_is_secure(env
)) {
959 return CP_ACCESS_TRAP_EL2
;
960 /* Check if CPACR accesses are to be trapped to EL3 */
961 } else if (arm_current_el(env
) < 3 &&
962 (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
963 return CP_ACCESS_TRAP_EL3
;
970 static CPAccessResult
cptr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
973 /* Check if CPTR accesses are set to trap to EL3 */
974 if (arm_current_el(env
) == 2 && (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
975 return CP_ACCESS_TRAP_EL3
;
981 static const ARMCPRegInfo v6_cp_reginfo
[] = {
982 /* prefetch by MVA in v6, NOP in v7 */
983 { .name
= "MVA_prefetch",
984 .cp
= 15, .crn
= 7, .crm
= 13, .opc1
= 0, .opc2
= 1,
985 .access
= PL1_W
, .type
= ARM_CP_NOP
},
986 /* We need to break the TB after ISB to execute self-modifying code
987 * correctly and also to take any pending interrupts immediately.
988 * So use arm_cp_write_ignore() function instead of ARM_CP_NOP flag.
990 { .name
= "ISB", .cp
= 15, .crn
= 7, .crm
= 5, .opc1
= 0, .opc2
= 4,
991 .access
= PL0_W
, .type
= ARM_CP_NO_RAW
, .writefn
= arm_cp_write_ignore
},
992 { .name
= "DSB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 4,
993 .access
= PL0_W
, .type
= ARM_CP_NOP
},
994 { .name
= "DMB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 5,
995 .access
= PL0_W
, .type
= ARM_CP_NOP
},
996 { .name
= "IFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 2,
998 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ifar_s
),
999 offsetof(CPUARMState
, cp15
.ifar_ns
) },
1001 /* Watchpoint Fault Address Register : should actually only be present
1002 * for 1136, 1176, 11MPCore.
1004 { .name
= "WFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 1,
1005 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0, },
1006 { .name
= "CPACR", .state
= ARM_CP_STATE_BOTH
, .opc0
= 3,
1007 .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 2, .accessfn
= cpacr_access
,
1008 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.cpacr_el1
),
1009 .resetfn
= cpacr_reset
, .writefn
= cpacr_write
, .readfn
= cpacr_read
},
1013 /* Definitions for the PMU registers */
1014 #define PMCRN_MASK 0xf800
1015 #define PMCRN_SHIFT 11
1023 #define PMXEVTYPER_P 0x80000000
1024 #define PMXEVTYPER_U 0x40000000
1025 #define PMXEVTYPER_NSK 0x20000000
1026 #define PMXEVTYPER_NSU 0x10000000
1027 #define PMXEVTYPER_NSH 0x08000000
1028 #define PMXEVTYPER_M 0x04000000
1029 #define PMXEVTYPER_MT 0x02000000
1030 #define PMXEVTYPER_EVTCOUNT 0x0000ffff
1031 #define PMXEVTYPER_MASK (PMXEVTYPER_P | PMXEVTYPER_U | PMXEVTYPER_NSK | \
1032 PMXEVTYPER_NSU | PMXEVTYPER_NSH | \
1033 PMXEVTYPER_M | PMXEVTYPER_MT | \
1034 PMXEVTYPER_EVTCOUNT)
1036 #define PMCCFILTR 0xf8000000
1037 #define PMCCFILTR_M PMXEVTYPER_M
1038 #define PMCCFILTR_EL0 (PMCCFILTR | PMCCFILTR_M)
1040 static inline uint32_t pmu_num_counters(CPUARMState
*env
)
1042 return (env
->cp15
.c9_pmcr
& PMCRN_MASK
) >> PMCRN_SHIFT
;
1045 /* Bits allowed to be set/cleared for PMCNTEN* and PMINTEN* */
1046 static inline uint64_t pmu_counter_mask(CPUARMState
*env
)
1048 return (1 << 31) | ((1 << pmu_num_counters(env
)) - 1);
1051 typedef struct pm_event
{
1052 uint16_t number
; /* PMEVTYPER.evtCount is 16 bits wide */
1053 /* If the event is supported on this CPU (used to generate PMCEID[01]) */
1054 bool (*supported
)(CPUARMState
*);
1056 * Retrieve the current count of the underlying event. The programmed
1057 * counters hold a difference from the return value from this function
1059 uint64_t (*get_count
)(CPUARMState
*);
1061 * Return how many nanoseconds it will take (at a minimum) for count events
1062 * to occur. A negative value indicates the counter will never overflow, or
1063 * that the counter has otherwise arranged for the overflow bit to be set
1064 * and the PMU interrupt to be raised on overflow.
1066 int64_t (*ns_per_count
)(uint64_t);
1069 static bool event_always_supported(CPUARMState
*env
)
1074 static uint64_t swinc_get_count(CPUARMState
*env
)
1077 * SW_INCR events are written directly to the pmevcntr's by writes to
1078 * PMSWINC, so there is no underlying count maintained by the PMU itself
1083 static int64_t swinc_ns_per(uint64_t ignored
)
1089 * Return the underlying cycle count for the PMU cycle counters. If we're in
1090 * usermode, simply return 0.
1092 static uint64_t cycles_get_count(CPUARMState
*env
)
1094 #ifndef CONFIG_USER_ONLY
1095 return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1096 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1098 return cpu_get_host_ticks();
1102 #ifndef CONFIG_USER_ONLY
1103 static int64_t cycles_ns_per(uint64_t cycles
)
1105 return (ARM_CPU_FREQ
/ NANOSECONDS_PER_SECOND
) * cycles
;
1108 static bool instructions_supported(CPUARMState
*env
)
1110 return use_icount
== 1 /* Precise instruction counting */;
1113 static uint64_t instructions_get_count(CPUARMState
*env
)
1115 return (uint64_t)cpu_get_icount_raw();
1118 static int64_t instructions_ns_per(uint64_t icount
)
1120 return cpu_icount_to_ns((int64_t)icount
);
1124 static const pm_event pm_events
[] = {
1125 { .number
= 0x000, /* SW_INCR */
1126 .supported
= event_always_supported
,
1127 .get_count
= swinc_get_count
,
1128 .ns_per_count
= swinc_ns_per
,
1130 #ifndef CONFIG_USER_ONLY
1131 { .number
= 0x008, /* INST_RETIRED, Instruction architecturally executed */
1132 .supported
= instructions_supported
,
1133 .get_count
= instructions_get_count
,
1134 .ns_per_count
= instructions_ns_per
,
1136 { .number
= 0x011, /* CPU_CYCLES, Cycle */
1137 .supported
= event_always_supported
,
1138 .get_count
= cycles_get_count
,
1139 .ns_per_count
= cycles_ns_per
,
1145 * Note: Before increasing MAX_EVENT_ID beyond 0x3f into the 0x40xx range of
1146 * events (i.e. the statistical profiling extension), this implementation
1147 * should first be updated to something sparse instead of the current
1148 * supported_event_map[] array.
1150 #define MAX_EVENT_ID 0x11
1151 #define UNSUPPORTED_EVENT UINT16_MAX
1152 static uint16_t supported_event_map
[MAX_EVENT_ID
+ 1];
1155 * Called upon CPU initialization to initialize PMCEID[01]_EL0 and build a map
1156 * of ARM event numbers to indices in our pm_events array.
1158 * Note: Events in the 0x40XX range are not currently supported.
1160 void pmu_init(ARMCPU
*cpu
)
1165 * Empty supported_event_map and cpu->pmceid[01] before adding supported
1168 for (i
= 0; i
< ARRAY_SIZE(supported_event_map
); i
++) {
1169 supported_event_map
[i
] = UNSUPPORTED_EVENT
;
1174 for (i
= 0; i
< ARRAY_SIZE(pm_events
); i
++) {
1175 const pm_event
*cnt
= &pm_events
[i
];
1176 assert(cnt
->number
<= MAX_EVENT_ID
);
1177 /* We do not currently support events in the 0x40xx range */
1178 assert(cnt
->number
<= 0x3f);
1180 if (cnt
->supported(&cpu
->env
)) {
1181 supported_event_map
[cnt
->number
] = i
;
1182 uint64_t event_mask
= 1ULL << (cnt
->number
& 0x1f);
1183 if (cnt
->number
& 0x20) {
1184 cpu
->pmceid1
|= event_mask
;
1186 cpu
->pmceid0
|= event_mask
;
1193 * Check at runtime whether a PMU event is supported for the current machine
1195 static bool event_supported(uint16_t number
)
1197 if (number
> MAX_EVENT_ID
) {
1200 return supported_event_map
[number
] != UNSUPPORTED_EVENT
;
1203 static CPAccessResult
pmreg_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1206 /* Performance monitor registers user accessibility is controlled
1207 * by PMUSERENR. MDCR_EL2.TPM and MDCR_EL3.TPM allow configurable
1208 * trapping to EL2 or EL3 for other accesses.
1210 int el
= arm_current_el(env
);
1212 if (el
== 0 && !(env
->cp15
.c9_pmuserenr
& 1)) {
1213 return CP_ACCESS_TRAP
;
1215 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
1216 && !arm_is_secure_below_el3(env
)) {
1217 return CP_ACCESS_TRAP_EL2
;
1219 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
1220 return CP_ACCESS_TRAP_EL3
;
1223 return CP_ACCESS_OK
;
1226 static CPAccessResult
pmreg_access_xevcntr(CPUARMState
*env
,
1227 const ARMCPRegInfo
*ri
,
1230 /* ER: event counter read trap control */
1231 if (arm_feature(env
, ARM_FEATURE_V8
)
1232 && arm_current_el(env
) == 0
1233 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0
1235 return CP_ACCESS_OK
;
1238 return pmreg_access(env
, ri
, isread
);
1241 static CPAccessResult
pmreg_access_swinc(CPUARMState
*env
,
1242 const ARMCPRegInfo
*ri
,
1245 /* SW: software increment write trap control */
1246 if (arm_feature(env
, ARM_FEATURE_V8
)
1247 && arm_current_el(env
) == 0
1248 && (env
->cp15
.c9_pmuserenr
& (1 << 1)) != 0
1250 return CP_ACCESS_OK
;
1253 return pmreg_access(env
, ri
, isread
);
1256 static CPAccessResult
pmreg_access_selr(CPUARMState
*env
,
1257 const ARMCPRegInfo
*ri
,
1260 /* ER: event counter read trap control */
1261 if (arm_feature(env
, ARM_FEATURE_V8
)
1262 && arm_current_el(env
) == 0
1263 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0) {
1264 return CP_ACCESS_OK
;
1267 return pmreg_access(env
, ri
, isread
);
1270 static CPAccessResult
pmreg_access_ccntr(CPUARMState
*env
,
1271 const ARMCPRegInfo
*ri
,
1274 /* CR: cycle counter read trap control */
1275 if (arm_feature(env
, ARM_FEATURE_V8
)
1276 && arm_current_el(env
) == 0
1277 && (env
->cp15
.c9_pmuserenr
& (1 << 2)) != 0
1279 return CP_ACCESS_OK
;
1282 return pmreg_access(env
, ri
, isread
);
1285 /* Returns true if the counter (pass 31 for PMCCNTR) should count events using
1286 * the current EL, security state, and register configuration.
1288 static bool pmu_counter_enabled(CPUARMState
*env
, uint8_t counter
)
1291 bool e
, p
, u
, nsk
, nsu
, nsh
, m
;
1292 bool enabled
, prohibited
, filtered
;
1293 bool secure
= arm_is_secure(env
);
1294 int el
= arm_current_el(env
);
1295 uint8_t hpmn
= env
->cp15
.mdcr_el2
& MDCR_HPMN
;
1297 if (!arm_feature(env
, ARM_FEATURE_PMU
)) {
1301 if (!arm_feature(env
, ARM_FEATURE_EL2
) ||
1302 (counter
< hpmn
|| counter
== 31)) {
1303 e
= env
->cp15
.c9_pmcr
& PMCRE
;
1305 e
= env
->cp15
.mdcr_el2
& MDCR_HPME
;
1307 enabled
= e
&& (env
->cp15
.c9_pmcnten
& (1 << counter
));
1310 if (el
== 2 && (counter
< hpmn
|| counter
== 31)) {
1311 prohibited
= env
->cp15
.mdcr_el2
& MDCR_HPMD
;
1316 prohibited
= arm_feature(env
, ARM_FEATURE_EL3
) &&
1317 (env
->cp15
.mdcr_el3
& MDCR_SPME
);
1320 if (prohibited
&& counter
== 31) {
1321 prohibited
= env
->cp15
.c9_pmcr
& PMCRDP
;
1324 if (counter
== 31) {
1325 filter
= env
->cp15
.pmccfiltr_el0
;
1327 filter
= env
->cp15
.c14_pmevtyper
[counter
];
1330 p
= filter
& PMXEVTYPER_P
;
1331 u
= filter
& PMXEVTYPER_U
;
1332 nsk
= arm_feature(env
, ARM_FEATURE_EL3
) && (filter
& PMXEVTYPER_NSK
);
1333 nsu
= arm_feature(env
, ARM_FEATURE_EL3
) && (filter
& PMXEVTYPER_NSU
);
1334 nsh
= arm_feature(env
, ARM_FEATURE_EL2
) && (filter
& PMXEVTYPER_NSH
);
1335 m
= arm_el_is_aa64(env
, 1) &&
1336 arm_feature(env
, ARM_FEATURE_EL3
) && (filter
& PMXEVTYPER_M
);
1339 filtered
= secure
? u
: u
!= nsu
;
1340 } else if (el
== 1) {
1341 filtered
= secure
? p
: p
!= nsk
;
1342 } else if (el
== 2) {
1348 if (counter
!= 31) {
1350 * If not checking PMCCNTR, ensure the counter is setup to an event we
1353 uint16_t event
= filter
& PMXEVTYPER_EVTCOUNT
;
1354 if (!event_supported(event
)) {
1359 return enabled
&& !prohibited
&& !filtered
;
1362 static void pmu_update_irq(CPUARMState
*env
)
1364 ARMCPU
*cpu
= env_archcpu(env
);
1365 qemu_set_irq(cpu
->pmu_interrupt
, (env
->cp15
.c9_pmcr
& PMCRE
) &&
1366 (env
->cp15
.c9_pminten
& env
->cp15
.c9_pmovsr
));
1370 * Ensure c15_ccnt is the guest-visible count so that operations such as
1371 * enabling/disabling the counter or filtering, modifying the count itself,
1372 * etc. can be done logically. This is essentially a no-op if the counter is
1373 * not enabled at the time of the call.
1375 static void pmccntr_op_start(CPUARMState
*env
)
1377 uint64_t cycles
= cycles_get_count(env
);
1379 if (pmu_counter_enabled(env
, 31)) {
1380 uint64_t eff_cycles
= cycles
;
1381 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1382 /* Increment once every 64 processor clock cycles */
1386 uint64_t new_pmccntr
= eff_cycles
- env
->cp15
.c15_ccnt_delta
;
1388 uint64_t overflow_mask
= env
->cp15
.c9_pmcr
& PMCRLC
? \
1389 1ull << 63 : 1ull << 31;
1390 if (env
->cp15
.c15_ccnt
& ~new_pmccntr
& overflow_mask
) {
1391 env
->cp15
.c9_pmovsr
|= (1 << 31);
1392 pmu_update_irq(env
);
1395 env
->cp15
.c15_ccnt
= new_pmccntr
;
1397 env
->cp15
.c15_ccnt_delta
= cycles
;
1401 * If PMCCNTR is enabled, recalculate the delta between the clock and the
1402 * guest-visible count. A call to pmccntr_op_finish should follow every call to
1405 static void pmccntr_op_finish(CPUARMState
*env
)
1407 if (pmu_counter_enabled(env
, 31)) {
1408 #ifndef CONFIG_USER_ONLY
1409 /* Calculate when the counter will next overflow */
1410 uint64_t remaining_cycles
= -env
->cp15
.c15_ccnt
;
1411 if (!(env
->cp15
.c9_pmcr
& PMCRLC
)) {
1412 remaining_cycles
= (uint32_t)remaining_cycles
;
1414 int64_t overflow_in
= cycles_ns_per(remaining_cycles
);
1416 if (overflow_in
> 0) {
1417 int64_t overflow_at
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) +
1419 ARMCPU
*cpu
= env_archcpu(env
);
1420 timer_mod_anticipate_ns(cpu
->pmu_timer
, overflow_at
);
1424 uint64_t prev_cycles
= env
->cp15
.c15_ccnt_delta
;
1425 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1426 /* Increment once every 64 processor clock cycles */
1429 env
->cp15
.c15_ccnt_delta
= prev_cycles
- env
->cp15
.c15_ccnt
;
1433 static void pmevcntr_op_start(CPUARMState
*env
, uint8_t counter
)
1436 uint16_t event
= env
->cp15
.c14_pmevtyper
[counter
] & PMXEVTYPER_EVTCOUNT
;
1438 if (event_supported(event
)) {
1439 uint16_t event_idx
= supported_event_map
[event
];
1440 count
= pm_events
[event_idx
].get_count(env
);
1443 if (pmu_counter_enabled(env
, counter
)) {
1444 uint32_t new_pmevcntr
= count
- env
->cp15
.c14_pmevcntr_delta
[counter
];
1446 if (env
->cp15
.c14_pmevcntr
[counter
] & ~new_pmevcntr
& INT32_MIN
) {
1447 env
->cp15
.c9_pmovsr
|= (1 << counter
);
1448 pmu_update_irq(env
);
1450 env
->cp15
.c14_pmevcntr
[counter
] = new_pmevcntr
;
1452 env
->cp15
.c14_pmevcntr_delta
[counter
] = count
;
1455 static void pmevcntr_op_finish(CPUARMState
*env
, uint8_t counter
)
1457 if (pmu_counter_enabled(env
, counter
)) {
1458 #ifndef CONFIG_USER_ONLY
1459 uint16_t event
= env
->cp15
.c14_pmevtyper
[counter
] & PMXEVTYPER_EVTCOUNT
;
1460 uint16_t event_idx
= supported_event_map
[event
];
1461 uint64_t delta
= UINT32_MAX
-
1462 (uint32_t)env
->cp15
.c14_pmevcntr
[counter
] + 1;
1463 int64_t overflow_in
= pm_events
[event_idx
].ns_per_count(delta
);
1465 if (overflow_in
> 0) {
1466 int64_t overflow_at
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) +
1468 ARMCPU
*cpu
= env_archcpu(env
);
1469 timer_mod_anticipate_ns(cpu
->pmu_timer
, overflow_at
);
1473 env
->cp15
.c14_pmevcntr_delta
[counter
] -=
1474 env
->cp15
.c14_pmevcntr
[counter
];
1478 void pmu_op_start(CPUARMState
*env
)
1481 pmccntr_op_start(env
);
1482 for (i
= 0; i
< pmu_num_counters(env
); i
++) {
1483 pmevcntr_op_start(env
, i
);
1487 void pmu_op_finish(CPUARMState
*env
)
1490 pmccntr_op_finish(env
);
1491 for (i
= 0; i
< pmu_num_counters(env
); i
++) {
1492 pmevcntr_op_finish(env
, i
);
1496 void pmu_pre_el_change(ARMCPU
*cpu
, void *ignored
)
1498 pmu_op_start(&cpu
->env
);
1501 void pmu_post_el_change(ARMCPU
*cpu
, void *ignored
)
1503 pmu_op_finish(&cpu
->env
);
1506 void arm_pmu_timer_cb(void *opaque
)
1508 ARMCPU
*cpu
= opaque
;
1511 * Update all the counter values based on the current underlying counts,
1512 * triggering interrupts to be raised, if necessary. pmu_op_finish() also
1513 * has the effect of setting the cpu->pmu_timer to the next earliest time a
1514 * counter may expire.
1516 pmu_op_start(&cpu
->env
);
1517 pmu_op_finish(&cpu
->env
);
1520 static void pmcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1525 if (value
& PMCRC
) {
1526 /* The counter has been reset */
1527 env
->cp15
.c15_ccnt
= 0;
1530 if (value
& PMCRP
) {
1532 for (i
= 0; i
< pmu_num_counters(env
); i
++) {
1533 env
->cp15
.c14_pmevcntr
[i
] = 0;
1537 /* only the DP, X, D and E bits are writable */
1538 env
->cp15
.c9_pmcr
&= ~0x39;
1539 env
->cp15
.c9_pmcr
|= (value
& 0x39);
1544 static void pmswinc_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1548 for (i
= 0; i
< pmu_num_counters(env
); i
++) {
1549 /* Increment a counter's count iff: */
1550 if ((value
& (1 << i
)) && /* counter's bit is set */
1551 /* counter is enabled and not filtered */
1552 pmu_counter_enabled(env
, i
) &&
1553 /* counter is SW_INCR */
1554 (env
->cp15
.c14_pmevtyper
[i
] & PMXEVTYPER_EVTCOUNT
) == 0x0) {
1555 pmevcntr_op_start(env
, i
);
1558 * Detect if this write causes an overflow since we can't predict
1559 * PMSWINC overflows like we can for other events
1561 uint32_t new_pmswinc
= env
->cp15
.c14_pmevcntr
[i
] + 1;
1563 if (env
->cp15
.c14_pmevcntr
[i
] & ~new_pmswinc
& INT32_MIN
) {
1564 env
->cp15
.c9_pmovsr
|= (1 << i
);
1565 pmu_update_irq(env
);
1568 env
->cp15
.c14_pmevcntr
[i
] = new_pmswinc
;
1570 pmevcntr_op_finish(env
, i
);
1575 static uint64_t pmccntr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1578 pmccntr_op_start(env
);
1579 ret
= env
->cp15
.c15_ccnt
;
1580 pmccntr_op_finish(env
);
1584 static void pmselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1587 /* The value of PMSELR.SEL affects the behavior of PMXEVTYPER and
1588 * PMXEVCNTR. We allow [0..31] to be written to PMSELR here; in the
1589 * meanwhile, we check PMSELR.SEL when PMXEVTYPER and PMXEVCNTR are
1592 env
->cp15
.c9_pmselr
= value
& 0x1f;
1595 static void pmccntr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1598 pmccntr_op_start(env
);
1599 env
->cp15
.c15_ccnt
= value
;
1600 pmccntr_op_finish(env
);
1603 static void pmccntr_write32(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1606 uint64_t cur_val
= pmccntr_read(env
, NULL
);
1608 pmccntr_write(env
, ri
, deposit64(cur_val
, 0, 32, value
));
1611 static void pmccfiltr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1614 pmccntr_op_start(env
);
1615 env
->cp15
.pmccfiltr_el0
= value
& PMCCFILTR_EL0
;
1616 pmccntr_op_finish(env
);
1619 static void pmccfiltr_write_a32(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1622 pmccntr_op_start(env
);
1623 /* M is not accessible from AArch32 */
1624 env
->cp15
.pmccfiltr_el0
= (env
->cp15
.pmccfiltr_el0
& PMCCFILTR_M
) |
1625 (value
& PMCCFILTR
);
1626 pmccntr_op_finish(env
);
1629 static uint64_t pmccfiltr_read_a32(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1631 /* M is not visible in AArch32 */
1632 return env
->cp15
.pmccfiltr_el0
& PMCCFILTR
;
1635 static void pmcntenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1638 value
&= pmu_counter_mask(env
);
1639 env
->cp15
.c9_pmcnten
|= value
;
1642 static void pmcntenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1645 value
&= pmu_counter_mask(env
);
1646 env
->cp15
.c9_pmcnten
&= ~value
;
1649 static void pmovsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1652 value
&= pmu_counter_mask(env
);
1653 env
->cp15
.c9_pmovsr
&= ~value
;
1654 pmu_update_irq(env
);
1657 static void pmovsset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1660 value
&= pmu_counter_mask(env
);
1661 env
->cp15
.c9_pmovsr
|= value
;
1662 pmu_update_irq(env
);
1665 static void pmevtyper_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1666 uint64_t value
, const uint8_t counter
)
1668 if (counter
== 31) {
1669 pmccfiltr_write(env
, ri
, value
);
1670 } else if (counter
< pmu_num_counters(env
)) {
1671 pmevcntr_op_start(env
, counter
);
1674 * If this counter's event type is changing, store the current
1675 * underlying count for the new type in c14_pmevcntr_delta[counter] so
1676 * pmevcntr_op_finish has the correct baseline when it converts back to
1679 uint16_t old_event
= env
->cp15
.c14_pmevtyper
[counter
] &
1680 PMXEVTYPER_EVTCOUNT
;
1681 uint16_t new_event
= value
& PMXEVTYPER_EVTCOUNT
;
1682 if (old_event
!= new_event
) {
1684 if (event_supported(new_event
)) {
1685 uint16_t event_idx
= supported_event_map
[new_event
];
1686 count
= pm_events
[event_idx
].get_count(env
);
1688 env
->cp15
.c14_pmevcntr_delta
[counter
] = count
;
1691 env
->cp15
.c14_pmevtyper
[counter
] = value
& PMXEVTYPER_MASK
;
1692 pmevcntr_op_finish(env
, counter
);
1694 /* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when
1695 * PMSELR value is equal to or greater than the number of implemented
1696 * counters, but not equal to 0x1f. We opt to behave as a RAZ/WI.
1700 static uint64_t pmevtyper_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1701 const uint8_t counter
)
1703 if (counter
== 31) {
1704 return env
->cp15
.pmccfiltr_el0
;
1705 } else if (counter
< pmu_num_counters(env
)) {
1706 return env
->cp15
.c14_pmevtyper
[counter
];
1709 * We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER
1710 * are CONSTRAINED UNPREDICTABLE. See comments in pmevtyper_write().
1716 static void pmevtyper_writefn(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1719 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1720 pmevtyper_write(env
, ri
, value
, counter
);
1723 static void pmevtyper_rawwrite(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1726 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1727 env
->cp15
.c14_pmevtyper
[counter
] = value
;
1730 * pmevtyper_rawwrite is called between a pair of pmu_op_start and
1731 * pmu_op_finish calls when loading saved state for a migration. Because
1732 * we're potentially updating the type of event here, the value written to
1733 * c14_pmevcntr_delta by the preceeding pmu_op_start call may be for a
1734 * different counter type. Therefore, we need to set this value to the
1735 * current count for the counter type we're writing so that pmu_op_finish
1736 * has the correct count for its calculation.
1738 uint16_t event
= value
& PMXEVTYPER_EVTCOUNT
;
1739 if (event_supported(event
)) {
1740 uint16_t event_idx
= supported_event_map
[event
];
1741 env
->cp15
.c14_pmevcntr_delta
[counter
] =
1742 pm_events
[event_idx
].get_count(env
);
1746 static uint64_t pmevtyper_readfn(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1748 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1749 return pmevtyper_read(env
, ri
, counter
);
1752 static void pmxevtyper_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1755 pmevtyper_write(env
, ri
, value
, env
->cp15
.c9_pmselr
& 31);
1758 static uint64_t pmxevtyper_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1760 return pmevtyper_read(env
, ri
, env
->cp15
.c9_pmselr
& 31);
1763 static void pmevcntr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1764 uint64_t value
, uint8_t counter
)
1766 if (counter
< pmu_num_counters(env
)) {
1767 pmevcntr_op_start(env
, counter
);
1768 env
->cp15
.c14_pmevcntr
[counter
] = value
;
1769 pmevcntr_op_finish(env
, counter
);
1772 * We opt to behave as a RAZ/WI when attempts to access PM[X]EVCNTR
1773 * are CONSTRAINED UNPREDICTABLE.
1777 static uint64_t pmevcntr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1780 if (counter
< pmu_num_counters(env
)) {
1782 pmevcntr_op_start(env
, counter
);
1783 ret
= env
->cp15
.c14_pmevcntr
[counter
];
1784 pmevcntr_op_finish(env
, counter
);
1787 /* We opt to behave as a RAZ/WI when attempts to access PM[X]EVCNTR
1788 * are CONSTRAINED UNPREDICTABLE. */
1793 static void pmevcntr_writefn(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1796 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1797 pmevcntr_write(env
, ri
, value
, counter
);
1800 static uint64_t pmevcntr_readfn(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1802 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1803 return pmevcntr_read(env
, ri
, counter
);
1806 static void pmevcntr_rawwrite(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1809 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1810 assert(counter
< pmu_num_counters(env
));
1811 env
->cp15
.c14_pmevcntr
[counter
] = value
;
1812 pmevcntr_write(env
, ri
, value
, counter
);
1815 static uint64_t pmevcntr_rawread(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1817 uint8_t counter
= ((ri
->crm
& 3) << 3) | (ri
->opc2
& 7);
1818 assert(counter
< pmu_num_counters(env
));
1819 return env
->cp15
.c14_pmevcntr
[counter
];
1822 static void pmxevcntr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1825 pmevcntr_write(env
, ri
, value
, env
->cp15
.c9_pmselr
& 31);
1828 static uint64_t pmxevcntr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1830 return pmevcntr_read(env
, ri
, env
->cp15
.c9_pmselr
& 31);
1833 static void pmuserenr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1836 if (arm_feature(env
, ARM_FEATURE_V8
)) {
1837 env
->cp15
.c9_pmuserenr
= value
& 0xf;
1839 env
->cp15
.c9_pmuserenr
= value
& 1;
1843 static void pmintenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1846 /* We have no event counters so only the C bit can be changed */
1847 value
&= pmu_counter_mask(env
);
1848 env
->cp15
.c9_pminten
|= value
;
1849 pmu_update_irq(env
);
1852 static void pmintenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1855 value
&= pmu_counter_mask(env
);
1856 env
->cp15
.c9_pminten
&= ~value
;
1857 pmu_update_irq(env
);
1860 static void vbar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1863 /* Note that even though the AArch64 view of this register has bits
1864 * [10:0] all RES0 we can only mask the bottom 5, to comply with the
1865 * architectural requirements for bits which are RES0 only in some
1866 * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
1867 * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
1869 raw_write(env
, ri
, value
& ~0x1FULL
);
1872 static void scr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
1874 /* Begin with base v8.0 state. */
1875 uint32_t valid_mask
= 0x3fff;
1876 ARMCPU
*cpu
= env_archcpu(env
);
1878 if (arm_el_is_aa64(env
, 3)) {
1879 value
|= SCR_FW
| SCR_AW
; /* these two bits are RES1. */
1880 valid_mask
&= ~SCR_NET
;
1882 valid_mask
&= ~(SCR_RW
| SCR_ST
);
1885 if (!arm_feature(env
, ARM_FEATURE_EL2
)) {
1886 valid_mask
&= ~SCR_HCE
;
1888 /* On ARMv7, SMD (or SCD as it is called in v7) is only
1889 * supported if EL2 exists. The bit is UNK/SBZP when
1890 * EL2 is unavailable. In QEMU ARMv7, we force it to always zero
1891 * when EL2 is unavailable.
1892 * On ARMv8, this bit is always available.
1894 if (arm_feature(env
, ARM_FEATURE_V7
) &&
1895 !arm_feature(env
, ARM_FEATURE_V8
)) {
1896 valid_mask
&= ~SCR_SMD
;
1899 if (cpu_isar_feature(aa64_lor
, cpu
)) {
1900 valid_mask
|= SCR_TLOR
;
1902 if (cpu_isar_feature(aa64_pauth
, cpu
)) {
1903 valid_mask
|= SCR_API
| SCR_APK
;
1906 /* Clear all-context RES0 bits. */
1907 value
&= valid_mask
;
1908 raw_write(env
, ri
, value
);
1911 static uint64_t ccsidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1913 ARMCPU
*cpu
= env_archcpu(env
);
1915 /* Acquire the CSSELR index from the bank corresponding to the CCSIDR
1918 uint32_t index
= A32_BANKED_REG_GET(env
, csselr
,
1919 ri
->secure
& ARM_CP_SECSTATE_S
);
1921 return cpu
->ccsidr
[index
];
1924 static void csselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1927 raw_write(env
, ri
, value
& 0xf);
1930 static uint64_t isr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1932 CPUState
*cs
= env_cpu(env
);
1933 uint64_t hcr_el2
= arm_hcr_el2_eff(env
);
1936 if (hcr_el2
& HCR_IMO
) {
1937 if (cs
->interrupt_request
& CPU_INTERRUPT_VIRQ
) {
1941 if (cs
->interrupt_request
& CPU_INTERRUPT_HARD
) {
1946 if (hcr_el2
& HCR_FMO
) {
1947 if (cs
->interrupt_request
& CPU_INTERRUPT_VFIQ
) {
1951 if (cs
->interrupt_request
& CPU_INTERRUPT_FIQ
) {
1956 /* External aborts are not possible in QEMU so A bit is always clear */
1960 static const ARMCPRegInfo v7_cp_reginfo
[] = {
1961 /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
1962 { .name
= "NOP", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
1963 .access
= PL1_W
, .type
= ARM_CP_NOP
},
1964 /* Performance monitors are implementation defined in v7,
1965 * but with an ARM recommended set of registers, which we
1968 * Performance registers fall into three categories:
1969 * (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
1970 * (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
1971 * (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
1972 * For the cases controlled by PMUSERENR we must set .access to PL0_RW
1973 * or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
1975 { .name
= "PMCNTENSET", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 1,
1976 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
1977 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1978 .writefn
= pmcntenset_write
,
1979 .accessfn
= pmreg_access
,
1980 .raw_writefn
= raw_write
},
1981 { .name
= "PMCNTENSET_EL0", .state
= ARM_CP_STATE_AA64
,
1982 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 1,
1983 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1984 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
), .resetvalue
= 0,
1985 .writefn
= pmcntenset_write
, .raw_writefn
= raw_write
},
1986 { .name
= "PMCNTENCLR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 2,
1988 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1989 .accessfn
= pmreg_access
,
1990 .writefn
= pmcntenclr_write
,
1991 .type
= ARM_CP_ALIAS
},
1992 { .name
= "PMCNTENCLR_EL0", .state
= ARM_CP_STATE_AA64
,
1993 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 2,
1994 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1995 .type
= ARM_CP_ALIAS
,
1996 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
),
1997 .writefn
= pmcntenclr_write
},
1998 { .name
= "PMOVSR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 3,
1999 .access
= PL0_RW
, .type
= ARM_CP_IO
,
2000 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmovsr
),
2001 .accessfn
= pmreg_access
,
2002 .writefn
= pmovsr_write
,
2003 .raw_writefn
= raw_write
},
2004 { .name
= "PMOVSCLR_EL0", .state
= ARM_CP_STATE_AA64
,
2005 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 3,
2006 .access
= PL0_RW
, .accessfn
= pmreg_access
,
2007 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2008 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmovsr
),
2009 .writefn
= pmovsr_write
,
2010 .raw_writefn
= raw_write
},
2011 { .name
= "PMSWINC", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 4,
2012 .access
= PL0_W
, .accessfn
= pmreg_access_swinc
,
2013 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2014 .writefn
= pmswinc_write
},
2015 { .name
= "PMSWINC_EL0", .state
= ARM_CP_STATE_AA64
,
2016 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 4,
2017 .access
= PL0_W
, .accessfn
= pmreg_access_swinc
,
2018 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2019 .writefn
= pmswinc_write
},
2020 { .name
= "PMSELR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 5,
2021 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
2022 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmselr
),
2023 .accessfn
= pmreg_access_selr
, .writefn
= pmselr_write
,
2024 .raw_writefn
= raw_write
},
2025 { .name
= "PMSELR_EL0", .state
= ARM_CP_STATE_AA64
,
2026 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 5,
2027 .access
= PL0_RW
, .accessfn
= pmreg_access_selr
,
2028 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmselr
),
2029 .writefn
= pmselr_write
, .raw_writefn
= raw_write
, },
2030 { .name
= "PMCCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 0,
2031 .access
= PL0_RW
, .resetvalue
= 0, .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2032 .readfn
= pmccntr_read
, .writefn
= pmccntr_write32
,
2033 .accessfn
= pmreg_access_ccntr
},
2034 { .name
= "PMCCNTR_EL0", .state
= ARM_CP_STATE_AA64
,
2035 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 0,
2036 .access
= PL0_RW
, .accessfn
= pmreg_access_ccntr
,
2038 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_ccnt
),
2039 .readfn
= pmccntr_read
, .writefn
= pmccntr_write
,
2040 .raw_readfn
= raw_read
, .raw_writefn
= raw_write
, },
2041 { .name
= "PMCCFILTR", .cp
= 15, .opc1
= 0, .crn
= 14, .crm
= 15, .opc2
= 7,
2042 .writefn
= pmccfiltr_write_a32
, .readfn
= pmccfiltr_read_a32
,
2043 .access
= PL0_RW
, .accessfn
= pmreg_access
,
2044 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2046 { .name
= "PMCCFILTR_EL0", .state
= ARM_CP_STATE_AA64
,
2047 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 15, .opc2
= 7,
2048 .writefn
= pmccfiltr_write
, .raw_writefn
= raw_write
,
2049 .access
= PL0_RW
, .accessfn
= pmreg_access
,
2051 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmccfiltr_el0
),
2053 { .name
= "PMXEVTYPER", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 1,
2054 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2055 .accessfn
= pmreg_access
,
2056 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
2057 { .name
= "PMXEVTYPER_EL0", .state
= ARM_CP_STATE_AA64
,
2058 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 1,
2059 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2060 .accessfn
= pmreg_access
,
2061 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
2062 { .name
= "PMXEVCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 2,
2063 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2064 .accessfn
= pmreg_access_xevcntr
,
2065 .writefn
= pmxevcntr_write
, .readfn
= pmxevcntr_read
},
2066 { .name
= "PMXEVCNTR_EL0", .state
= ARM_CP_STATE_AA64
,
2067 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 2,
2068 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2069 .accessfn
= pmreg_access_xevcntr
,
2070 .writefn
= pmxevcntr_write
, .readfn
= pmxevcntr_read
},
2071 { .name
= "PMUSERENR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 0,
2072 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
,
2073 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmuserenr
),
2075 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
2076 { .name
= "PMUSERENR_EL0", .state
= ARM_CP_STATE_AA64
,
2077 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 14, .opc2
= 0,
2078 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
2079 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmuserenr
),
2081 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
2082 { .name
= "PMINTENSET", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 1,
2083 .access
= PL1_RW
, .accessfn
= access_tpm
,
2084 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2085 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pminten
),
2087 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
},
2088 { .name
= "PMINTENSET_EL1", .state
= ARM_CP_STATE_AA64
,
2089 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 1,
2090 .access
= PL1_RW
, .accessfn
= access_tpm
,
2092 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
2093 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
,
2094 .resetvalue
= 0x0 },
2095 { .name
= "PMINTENCLR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 2,
2096 .access
= PL1_RW
, .accessfn
= access_tpm
,
2097 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2098 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
2099 .writefn
= pmintenclr_write
, },
2100 { .name
= "PMINTENCLR_EL1", .state
= ARM_CP_STATE_AA64
,
2101 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 2,
2102 .access
= PL1_RW
, .accessfn
= access_tpm
,
2103 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2104 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
2105 .writefn
= pmintenclr_write
},
2106 { .name
= "CCSIDR", .state
= ARM_CP_STATE_BOTH
,
2107 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 0,
2108 .access
= PL1_R
, .readfn
= ccsidr_read
, .type
= ARM_CP_NO_RAW
},
2109 { .name
= "CSSELR", .state
= ARM_CP_STATE_BOTH
,
2110 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 2, .opc2
= 0,
2111 .access
= PL1_RW
, .writefn
= csselr_write
, .resetvalue
= 0,
2112 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.csselr_s
),
2113 offsetof(CPUARMState
, cp15
.csselr_ns
) } },
2114 /* Auxiliary ID register: this actually has an IMPDEF value but for now
2115 * just RAZ for all cores:
2117 { .name
= "AIDR", .state
= ARM_CP_STATE_BOTH
,
2118 .opc0
= 3, .opc1
= 1, .crn
= 0, .crm
= 0, .opc2
= 7,
2119 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
2120 /* Auxiliary fault status registers: these also are IMPDEF, and we
2121 * choose to RAZ/WI for all cores.
2123 { .name
= "AFSR0_EL1", .state
= ARM_CP_STATE_BOTH
,
2124 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 0,
2125 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
2126 { .name
= "AFSR1_EL1", .state
= ARM_CP_STATE_BOTH
,
2127 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 1,
2128 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
2129 /* MAIR can just read-as-written because we don't implement caches
2130 * and so don't need to care about memory attributes.
2132 { .name
= "MAIR_EL1", .state
= ARM_CP_STATE_AA64
,
2133 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0,
2134 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[1]),
2136 { .name
= "MAIR_EL3", .state
= ARM_CP_STATE_AA64
,
2137 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 2, .opc2
= 0,
2138 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[3]),
2140 /* For non-long-descriptor page tables these are PRRR and NMRR;
2141 * regardless they still act as reads-as-written for QEMU.
2143 /* MAIR0/1 are defined separately from their 64-bit counterpart which
2144 * allows them to assign the correct fieldoffset based on the endianness
2145 * handled in the field definitions.
2147 { .name
= "MAIR0", .state
= ARM_CP_STATE_AA32
,
2148 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0, .access
= PL1_RW
,
2149 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair0_s
),
2150 offsetof(CPUARMState
, cp15
.mair0_ns
) },
2151 .resetfn
= arm_cp_reset_ignore
},
2152 { .name
= "MAIR1", .state
= ARM_CP_STATE_AA32
,
2153 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 1, .access
= PL1_RW
,
2154 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair1_s
),
2155 offsetof(CPUARMState
, cp15
.mair1_ns
) },
2156 .resetfn
= arm_cp_reset_ignore
},
2157 { .name
= "ISR_EL1", .state
= ARM_CP_STATE_BOTH
,
2158 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 1, .opc2
= 0,
2159 .type
= ARM_CP_NO_RAW
, .access
= PL1_R
, .readfn
= isr_read
},
2160 /* 32 bit ITLB invalidates */
2161 { .name
= "ITLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 0,
2162 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
2163 { .name
= "ITLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 1,
2164 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
2165 { .name
= "ITLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 2,
2166 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
2167 /* 32 bit DTLB invalidates */
2168 { .name
= "DTLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 0,
2169 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
2170 { .name
= "DTLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 1,
2171 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
2172 { .name
= "DTLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 2,
2173 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
2174 /* 32 bit TLB invalidates */
2175 { .name
= "TLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
2176 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
2177 { .name
= "TLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
2178 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
2179 { .name
= "TLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
2180 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
2181 { .name
= "TLBIMVAA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
2182 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
2186 static const ARMCPRegInfo v7mp_cp_reginfo
[] = {
2187 /* 32 bit TLB invalidates, Inner Shareable */
2188 { .name
= "TLBIALLIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
2189 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_is_write
},
2190 { .name
= "TLBIMVAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
2191 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
2192 { .name
= "TLBIASIDIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
2193 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
2194 .writefn
= tlbiasid_is_write
},
2195 { .name
= "TLBIMVAAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
2196 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
2197 .writefn
= tlbimvaa_is_write
},
2201 static const ARMCPRegInfo pmovsset_cp_reginfo
[] = {
2202 /* PMOVSSET is not implemented in v7 before v7ve */
2203 { .name
= "PMOVSSET", .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 3,
2204 .access
= PL0_RW
, .accessfn
= pmreg_access
,
2205 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2206 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmovsr
),
2207 .writefn
= pmovsset_write
,
2208 .raw_writefn
= raw_write
},
2209 { .name
= "PMOVSSET_EL0", .state
= ARM_CP_STATE_AA64
,
2210 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 14, .opc2
= 3,
2211 .access
= PL0_RW
, .accessfn
= pmreg_access
,
2212 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
2213 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmovsr
),
2214 .writefn
= pmovsset_write
,
2215 .raw_writefn
= raw_write
},
2219 static void teecr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2226 static CPAccessResult
teehbr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2229 if (arm_current_el(env
) == 0 && (env
->teecr
& 1)) {
2230 return CP_ACCESS_TRAP
;
2232 return CP_ACCESS_OK
;
2235 static const ARMCPRegInfo t2ee_cp_reginfo
[] = {
2236 { .name
= "TEECR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 6, .opc2
= 0,
2237 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, teecr
),
2239 .writefn
= teecr_write
},
2240 { .name
= "TEEHBR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 6, .opc2
= 0,
2241 .access
= PL0_RW
, .fieldoffset
= offsetof(CPUARMState
, teehbr
),
2242 .accessfn
= teehbr_access
, .resetvalue
= 0 },
2246 static const ARMCPRegInfo v6k_cp_reginfo
[] = {
2247 { .name
= "TPIDR_EL0", .state
= ARM_CP_STATE_AA64
,
2248 .opc0
= 3, .opc1
= 3, .opc2
= 2, .crn
= 13, .crm
= 0,
2250 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[0]), .resetvalue
= 0 },
2251 { .name
= "TPIDRURW", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 2,
2253 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrurw_s
),
2254 offsetoflow32(CPUARMState
, cp15
.tpidrurw_ns
) },
2255 .resetfn
= arm_cp_reset_ignore
},
2256 { .name
= "TPIDRRO_EL0", .state
= ARM_CP_STATE_AA64
,
2257 .opc0
= 3, .opc1
= 3, .opc2
= 3, .crn
= 13, .crm
= 0,
2258 .access
= PL0_R
|PL1_W
,
2259 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidrro_el
[0]),
2261 { .name
= "TPIDRURO", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 3,
2262 .access
= PL0_R
|PL1_W
,
2263 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidruro_s
),
2264 offsetoflow32(CPUARMState
, cp15
.tpidruro_ns
) },
2265 .resetfn
= arm_cp_reset_ignore
},
2266 { .name
= "TPIDR_EL1", .state
= ARM_CP_STATE_AA64
,
2267 .opc0
= 3, .opc1
= 0, .opc2
= 4, .crn
= 13, .crm
= 0,
2269 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[1]), .resetvalue
= 0 },
2270 { .name
= "TPIDRPRW", .opc1
= 0, .cp
= 15, .crn
= 13, .crm
= 0, .opc2
= 4,
2272 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrprw_s
),
2273 offsetoflow32(CPUARMState
, cp15
.tpidrprw_ns
) },
2278 #ifndef CONFIG_USER_ONLY
2280 static CPAccessResult
gt_cntfrq_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2283 /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero.
2284 * Writable only at the highest implemented exception level.
2286 int el
= arm_current_el(env
);
2290 if (!extract32(env
->cp15
.c14_cntkctl
, 0, 2)) {
2291 return CP_ACCESS_TRAP
;
2295 if (!isread
&& ri
->state
== ARM_CP_STATE_AA32
&&
2296 arm_is_secure_below_el3(env
)) {
2297 /* Accesses from 32-bit Secure EL1 UNDEF (*not* trap to EL3!) */
2298 return CP_ACCESS_TRAP_UNCATEGORIZED
;
2306 if (!isread
&& el
< arm_highest_el(env
)) {
2307 return CP_ACCESS_TRAP_UNCATEGORIZED
;
2310 return CP_ACCESS_OK
;
2313 static CPAccessResult
gt_counter_access(CPUARMState
*env
, int timeridx
,
2316 unsigned int cur_el
= arm_current_el(env
);
2317 bool secure
= arm_is_secure(env
);
2319 /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
2321 !extract32(env
->cp15
.c14_cntkctl
, timeridx
, 1)) {
2322 return CP_ACCESS_TRAP
;
2325 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
2326 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
2327 !extract32(env
->cp15
.cnthctl_el2
, 0, 1)) {
2328 return CP_ACCESS_TRAP_EL2
;
2330 return CP_ACCESS_OK
;
2333 static CPAccessResult
gt_timer_access(CPUARMState
*env
, int timeridx
,
2336 unsigned int cur_el
= arm_current_el(env
);
2337 bool secure
= arm_is_secure(env
);
2339 /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
2340 * EL0[PV]TEN is zero.
2343 !extract32(env
->cp15
.c14_cntkctl
, 9 - timeridx
, 1)) {
2344 return CP_ACCESS_TRAP
;
2347 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
2348 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
2349 !extract32(env
->cp15
.cnthctl_el2
, 1, 1)) {
2350 return CP_ACCESS_TRAP_EL2
;
2352 return CP_ACCESS_OK
;
2355 static CPAccessResult
gt_pct_access(CPUARMState
*env
,
2356 const ARMCPRegInfo
*ri
,
2359 return gt_counter_access(env
, GTIMER_PHYS
, isread
);
2362 static CPAccessResult
gt_vct_access(CPUARMState
*env
,
2363 const ARMCPRegInfo
*ri
,
2366 return gt_counter_access(env
, GTIMER_VIRT
, isread
);
2369 static CPAccessResult
gt_ptimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2372 return gt_timer_access(env
, GTIMER_PHYS
, isread
);
2375 static CPAccessResult
gt_vtimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2378 return gt_timer_access(env
, GTIMER_VIRT
, isread
);
2381 static CPAccessResult
gt_stimer_access(CPUARMState
*env
,
2382 const ARMCPRegInfo
*ri
,
2385 /* The AArch64 register view of the secure physical timer is
2386 * always accessible from EL3, and configurably accessible from
2389 switch (arm_current_el(env
)) {
2391 if (!arm_is_secure(env
)) {
2392 return CP_ACCESS_TRAP
;
2394 if (!(env
->cp15
.scr_el3
& SCR_ST
)) {
2395 return CP_ACCESS_TRAP_EL3
;
2397 return CP_ACCESS_OK
;
2400 return CP_ACCESS_TRAP
;
2402 return CP_ACCESS_OK
;
2404 g_assert_not_reached();
2408 static uint64_t gt_get_countervalue(CPUARMState
*env
)
2410 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) / GTIMER_SCALE
;
2413 static void gt_recalc_timer(ARMCPU
*cpu
, int timeridx
)
2415 ARMGenericTimer
*gt
= &cpu
->env
.cp15
.c14_timer
[timeridx
];
2418 /* Timer enabled: calculate and set current ISTATUS, irq, and
2419 * reset timer to when ISTATUS next has to change
2421 uint64_t offset
= timeridx
== GTIMER_VIRT
?
2422 cpu
->env
.cp15
.cntvoff_el2
: 0;
2423 uint64_t count
= gt_get_countervalue(&cpu
->env
);
2424 /* Note that this must be unsigned 64 bit arithmetic: */
2425 int istatus
= count
- offset
>= gt
->cval
;
2429 gt
->ctl
= deposit32(gt
->ctl
, 2, 1, istatus
);
2431 irqstate
= (istatus
&& !(gt
->ctl
& 2));
2432 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
2435 /* Next transition is when count rolls back over to zero */
2436 nexttick
= UINT64_MAX
;
2438 /* Next transition is when we hit cval */
2439 nexttick
= gt
->cval
+ offset
;
2441 /* Note that the desired next expiry time might be beyond the
2442 * signed-64-bit range of a QEMUTimer -- in this case we just
2443 * set the timer for as far in the future as possible. When the
2444 * timer expires we will reset the timer for any remaining period.
2446 if (nexttick
> INT64_MAX
/ GTIMER_SCALE
) {
2447 nexttick
= INT64_MAX
/ GTIMER_SCALE
;
2449 timer_mod(cpu
->gt_timer
[timeridx
], nexttick
);
2450 trace_arm_gt_recalc(timeridx
, irqstate
, nexttick
);
2452 /* Timer disabled: ISTATUS and timer output always clear */
2454 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], 0);
2455 timer_del(cpu
->gt_timer
[timeridx
]);
2456 trace_arm_gt_recalc_disabled(timeridx
);
2460 static void gt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2463 ARMCPU
*cpu
= env_archcpu(env
);
2465 timer_del(cpu
->gt_timer
[timeridx
]);
2468 static uint64_t gt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2470 return gt_get_countervalue(env
);
2473 static uint64_t gt_virt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2475 return gt_get_countervalue(env
) - env
->cp15
.cntvoff_el2
;
2478 static void gt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2482 trace_arm_gt_cval_write(timeridx
, value
);
2483 env
->cp15
.c14_timer
[timeridx
].cval
= value
;
2484 gt_recalc_timer(env_archcpu(env
), timeridx
);
2487 static uint64_t gt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2490 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
2492 return (uint32_t)(env
->cp15
.c14_timer
[timeridx
].cval
-
2493 (gt_get_countervalue(env
) - offset
));
2496 static void gt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2500 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
2502 trace_arm_gt_tval_write(timeridx
, value
);
2503 env
->cp15
.c14_timer
[timeridx
].cval
= gt_get_countervalue(env
) - offset
+
2504 sextract64(value
, 0, 32);
2505 gt_recalc_timer(env_archcpu(env
), timeridx
);
2508 static void gt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2512 ARMCPU
*cpu
= env_archcpu(env
);
2513 uint32_t oldval
= env
->cp15
.c14_timer
[timeridx
].ctl
;
2515 trace_arm_gt_ctl_write(timeridx
, value
);
2516 env
->cp15
.c14_timer
[timeridx
].ctl
= deposit64(oldval
, 0, 2, value
);
2517 if ((oldval
^ value
) & 1) {
2518 /* Enable toggled */
2519 gt_recalc_timer(cpu
, timeridx
);
2520 } else if ((oldval
^ value
) & 2) {
2521 /* IMASK toggled: don't need to recalculate,
2522 * just set the interrupt line based on ISTATUS
2524 int irqstate
= (oldval
& 4) && !(value
& 2);
2526 trace_arm_gt_imask_toggle(timeridx
, irqstate
);
2527 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
2531 static void gt_phys_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2533 gt_timer_reset(env
, ri
, GTIMER_PHYS
);
2536 static void gt_phys_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2539 gt_cval_write(env
, ri
, GTIMER_PHYS
, value
);
2542 static uint64_t gt_phys_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2544 return gt_tval_read(env
, ri
, GTIMER_PHYS
);
2547 static void gt_phys_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2550 gt_tval_write(env
, ri
, GTIMER_PHYS
, value
);
2553 static void gt_phys_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2556 gt_ctl_write(env
, ri
, GTIMER_PHYS
, value
);
2559 static void gt_virt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2561 gt_timer_reset(env
, ri
, GTIMER_VIRT
);
2564 static void gt_virt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2567 gt_cval_write(env
, ri
, GTIMER_VIRT
, value
);
2570 static uint64_t gt_virt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2572 return gt_tval_read(env
, ri
, GTIMER_VIRT
);
2575 static void gt_virt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2578 gt_tval_write(env
, ri
, GTIMER_VIRT
, value
);
2581 static void gt_virt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2584 gt_ctl_write(env
, ri
, GTIMER_VIRT
, value
);
2587 static void gt_cntvoff_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2590 ARMCPU
*cpu
= env_archcpu(env
);
2592 trace_arm_gt_cntvoff_write(value
);
2593 raw_write(env
, ri
, value
);
2594 gt_recalc_timer(cpu
, GTIMER_VIRT
);
2597 static void gt_hyp_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2599 gt_timer_reset(env
, ri
, GTIMER_HYP
);
2602 static void gt_hyp_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2605 gt_cval_write(env
, ri
, GTIMER_HYP
, value
);
2608 static uint64_t gt_hyp_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2610 return gt_tval_read(env
, ri
, GTIMER_HYP
);
2613 static void gt_hyp_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2616 gt_tval_write(env
, ri
, GTIMER_HYP
, value
);
2619 static void gt_hyp_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2622 gt_ctl_write(env
, ri
, GTIMER_HYP
, value
);
2625 static void gt_sec_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2627 gt_timer_reset(env
, ri
, GTIMER_SEC
);
2630 static void gt_sec_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2633 gt_cval_write(env
, ri
, GTIMER_SEC
, value
);
2636 static uint64_t gt_sec_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2638 return gt_tval_read(env
, ri
, GTIMER_SEC
);
2641 static void gt_sec_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2644 gt_tval_write(env
, ri
, GTIMER_SEC
, value
);
2647 static void gt_sec_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2650 gt_ctl_write(env
, ri
, GTIMER_SEC
, value
);
2653 void arm_gt_ptimer_cb(void *opaque
)
2655 ARMCPU
*cpu
= opaque
;
2657 gt_recalc_timer(cpu
, GTIMER_PHYS
);
2660 void arm_gt_vtimer_cb(void *opaque
)
2662 ARMCPU
*cpu
= opaque
;
2664 gt_recalc_timer(cpu
, GTIMER_VIRT
);
2667 void arm_gt_htimer_cb(void *opaque
)
2669 ARMCPU
*cpu
= opaque
;
2671 gt_recalc_timer(cpu
, GTIMER_HYP
);
2674 void arm_gt_stimer_cb(void *opaque
)
2676 ARMCPU
*cpu
= opaque
;
2678 gt_recalc_timer(cpu
, GTIMER_SEC
);
2681 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
2682 /* Note that CNTFRQ is purely reads-as-written for the benefit
2683 * of software; writing it doesn't actually change the timer frequency.
2684 * Our reset value matches the fixed frequency we implement the timer at.
2686 { .name
= "CNTFRQ", .cp
= 15, .crn
= 14, .crm
= 0, .opc1
= 0, .opc2
= 0,
2687 .type
= ARM_CP_ALIAS
,
2688 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
2689 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c14_cntfrq
),
2691 { .name
= "CNTFRQ_EL0", .state
= ARM_CP_STATE_AA64
,
2692 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 0,
2693 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
2694 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntfrq
),
2695 .resetvalue
= (1000 * 1000 * 1000) / GTIMER_SCALE
,
2697 /* overall control: mostly access permissions */
2698 { .name
= "CNTKCTL", .state
= ARM_CP_STATE_BOTH
,
2699 .opc0
= 3, .opc1
= 0, .crn
= 14, .crm
= 1, .opc2
= 0,
2701 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntkctl
),
2704 /* per-timer control */
2705 { .name
= "CNTP_CTL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
2706 .secure
= ARM_CP_SECSTATE_NS
,
2707 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL0_RW
,
2708 .accessfn
= gt_ptimer_access
,
2709 .fieldoffset
= offsetoflow32(CPUARMState
,
2710 cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
2711 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
2713 { .name
= "CNTP_CTL_S",
2714 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
2715 .secure
= ARM_CP_SECSTATE_S
,
2716 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL0_RW
,
2717 .accessfn
= gt_ptimer_access
,
2718 .fieldoffset
= offsetoflow32(CPUARMState
,
2719 cp15
.c14_timer
[GTIMER_SEC
].ctl
),
2720 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
2722 { .name
= "CNTP_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
2723 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 1,
2724 .type
= ARM_CP_IO
, .access
= PL0_RW
,
2725 .accessfn
= gt_ptimer_access
,
2726 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
2728 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
2730 { .name
= "CNTV_CTL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 1,
2731 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL0_RW
,
2732 .accessfn
= gt_vtimer_access
,
2733 .fieldoffset
= offsetoflow32(CPUARMState
,
2734 cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
2735 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
2737 { .name
= "CNTV_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
2738 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 1,
2739 .type
= ARM_CP_IO
, .access
= PL0_RW
,
2740 .accessfn
= gt_vtimer_access
,
2741 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
2743 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
2745 /* TimerValue views: a 32 bit downcounting view of the underlying state */
2746 { .name
= "CNTP_TVAL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
2747 .secure
= ARM_CP_SECSTATE_NS
,
2748 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL0_RW
,
2749 .accessfn
= gt_ptimer_access
,
2750 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
2752 { .name
= "CNTP_TVAL_S",
2753 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
2754 .secure
= ARM_CP_SECSTATE_S
,
2755 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL0_RW
,
2756 .accessfn
= gt_ptimer_access
,
2757 .readfn
= gt_sec_tval_read
, .writefn
= gt_sec_tval_write
,
2759 { .name
= "CNTP_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2760 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 0,
2761 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL0_RW
,
2762 .accessfn
= gt_ptimer_access
, .resetfn
= gt_phys_timer_reset
,
2763 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
2765 { .name
= "CNTV_TVAL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 0,
2766 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL0_RW
,
2767 .accessfn
= gt_vtimer_access
,
2768 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2770 { .name
= "CNTV_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2771 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 0,
2772 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL0_RW
,
2773 .accessfn
= gt_vtimer_access
, .resetfn
= gt_virt_timer_reset
,
2774 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2776 /* The counter itself */
2777 { .name
= "CNTPCT", .cp
= 15, .crm
= 14, .opc1
= 0,
2778 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2779 .accessfn
= gt_pct_access
,
2780 .readfn
= gt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2782 { .name
= "CNTPCT_EL0", .state
= ARM_CP_STATE_AA64
,
2783 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 1,
2784 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2785 .accessfn
= gt_pct_access
, .readfn
= gt_cnt_read
,
2787 { .name
= "CNTVCT", .cp
= 15, .crm
= 14, .opc1
= 1,
2788 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2789 .accessfn
= gt_vct_access
,
2790 .readfn
= gt_virt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2792 { .name
= "CNTVCT_EL0", .state
= ARM_CP_STATE_AA64
,
2793 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 2,
2794 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2795 .accessfn
= gt_vct_access
, .readfn
= gt_virt_cnt_read
,
2797 /* Comparison value, indicating when the timer goes off */
2798 { .name
= "CNTP_CVAL", .cp
= 15, .crm
= 14, .opc1
= 2,
2799 .secure
= ARM_CP_SECSTATE_NS
,
2801 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2802 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2803 .accessfn
= gt_ptimer_access
,
2804 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2806 { .name
= "CNTP_CVAL_S", .cp
= 15, .crm
= 14, .opc1
= 2,
2807 .secure
= ARM_CP_SECSTATE_S
,
2809 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2810 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2811 .accessfn
= gt_ptimer_access
,
2812 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2814 { .name
= "CNTP_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2815 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 2,
2818 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2819 .resetvalue
= 0, .accessfn
= gt_ptimer_access
,
2820 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2822 { .name
= "CNTV_CVAL", .cp
= 15, .crm
= 14, .opc1
= 3,
2824 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2825 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2826 .accessfn
= gt_vtimer_access
,
2827 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2829 { .name
= "CNTV_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2830 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 2,
2833 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2834 .resetvalue
= 0, .accessfn
= gt_vtimer_access
,
2835 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2837 /* Secure timer -- this is actually restricted to only EL3
2838 * and configurably Secure-EL1 via the accessfn.
2840 { .name
= "CNTPS_TVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2841 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 0,
2842 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
,
2843 .accessfn
= gt_stimer_access
,
2844 .readfn
= gt_sec_tval_read
,
2845 .writefn
= gt_sec_tval_write
,
2846 .resetfn
= gt_sec_timer_reset
,
2848 { .name
= "CNTPS_CTL_EL1", .state
= ARM_CP_STATE_AA64
,
2849 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 1,
2850 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2851 .accessfn
= gt_stimer_access
,
2852 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].ctl
),
2854 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
2856 { .name
= "CNTPS_CVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2857 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 2,
2858 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2859 .accessfn
= gt_stimer_access
,
2860 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2861 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2868 /* In user-mode most of the generic timer registers are inaccessible
2869 * however modern kernels (4.12+) allow access to cntvct_el0
2872 static uint64_t gt_virt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2874 /* Currently we have no support for QEMUTimer in linux-user so we
2875 * can't call gt_get_countervalue(env), instead we directly
2876 * call the lower level functions.
2878 return cpu_get_clock() / GTIMER_SCALE
;
2881 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
2882 { .name
= "CNTFRQ_EL0", .state
= ARM_CP_STATE_AA64
,
2883 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 0,
2884 .type
= ARM_CP_CONST
, .access
= PL0_R
/* no PL1_RW in linux-user */,
2885 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntfrq
),
2886 .resetvalue
= NANOSECONDS_PER_SECOND
/ GTIMER_SCALE
,
2888 { .name
= "CNTVCT_EL0", .state
= ARM_CP_STATE_AA64
,
2889 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 2,
2890 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2891 .readfn
= gt_virt_cnt_read
,
2898 static void par_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
2900 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2901 raw_write(env
, ri
, value
);
2902 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
2903 raw_write(env
, ri
, value
& 0xfffff6ff);
2905 raw_write(env
, ri
, value
& 0xfffff1ff);
2909 #ifndef CONFIG_USER_ONLY
2910 /* get_phys_addr() isn't present for user-mode-only targets */
2912 static CPAccessResult
ats_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2916 /* The ATS12NSO* operations must trap to EL3 if executed in
2917 * Secure EL1 (which can only happen if EL3 is AArch64).
2918 * They are simply UNDEF if executed from NS EL1.
2919 * They function normally from EL2 or EL3.
2921 if (arm_current_el(env
) == 1) {
2922 if (arm_is_secure_below_el3(env
)) {
2923 return CP_ACCESS_TRAP_UNCATEGORIZED_EL3
;
2925 return CP_ACCESS_TRAP_UNCATEGORIZED
;
2928 return CP_ACCESS_OK
;
2931 static uint64_t do_ats_write(CPUARMState
*env
, uint64_t value
,
2932 MMUAccessType access_type
, ARMMMUIdx mmu_idx
)
2935 target_ulong page_size
;
2939 bool format64
= false;
2940 MemTxAttrs attrs
= {};
2941 ARMMMUFaultInfo fi
= {};
2942 ARMCacheAttrs cacheattrs
= {};
2944 ret
= get_phys_addr(env
, value
, access_type
, mmu_idx
, &phys_addr
, &attrs
,
2945 &prot
, &page_size
, &fi
, &cacheattrs
);
2949 } else if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2952 * * TTBCR.EAE determines whether the result is returned using the
2953 * 32-bit or the 64-bit PAR format
2954 * * Instructions executed in Hyp mode always use the 64bit format
2956 * ATS1S2NSOxx uses the 64bit format if any of the following is true:
2957 * * The Non-secure TTBCR.EAE bit is set to 1
2958 * * The implementation includes EL2, and the value of HCR.VM is 1
2960 * (Note that HCR.DC makes HCR.VM behave as if it is 1.)
2962 * ATS1Hx always uses the 64bit format.
2964 format64
= arm_s1_regime_using_lpae_format(env
, mmu_idx
);
2966 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
2967 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
2968 format64
|= env
->cp15
.hcr_el2
& (HCR_VM
| HCR_DC
);
2970 format64
|= arm_current_el(env
) == 2;
2976 /* Create a 64-bit PAR */
2977 par64
= (1 << 11); /* LPAE bit always set */
2979 par64
|= phys_addr
& ~0xfffULL
;
2980 if (!attrs
.secure
) {
2981 par64
|= (1 << 9); /* NS */
2983 par64
|= (uint64_t)cacheattrs
.attrs
<< 56; /* ATTR */
2984 par64
|= cacheattrs
.shareability
<< 7; /* SH */
2986 uint32_t fsr
= arm_fi_to_lfsc(&fi
);
2989 par64
|= (fsr
& 0x3f) << 1; /* FS */
2991 par64
|= (1 << 9); /* S */
2994 par64
|= (1 << 8); /* PTW */
2998 /* fsr is a DFSR/IFSR value for the short descriptor
2999 * translation table format (with WnR always clear).
3000 * Convert it to a 32-bit PAR.
3003 /* We do not set any attribute bits in the PAR */
3004 if (page_size
== (1 << 24)
3005 && arm_feature(env
, ARM_FEATURE_V7
)) {
3006 par64
= (phys_addr
& 0xff000000) | (1 << 1);
3008 par64
= phys_addr
& 0xfffff000;
3010 if (!attrs
.secure
) {
3011 par64
|= (1 << 9); /* NS */
3014 uint32_t fsr
= arm_fi_to_sfsc(&fi
);
3016 par64
= ((fsr
& (1 << 10)) >> 5) | ((fsr
& (1 << 12)) >> 6) |
3017 ((fsr
& 0xf) << 1) | 1;
3023 static void ats_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
3025 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
3028 int el
= arm_current_el(env
);
3029 bool secure
= arm_is_secure_below_el3(env
);
3031 switch (ri
->opc2
& 6) {
3033 /* stage 1 current state PL1: ATS1CPR, ATS1CPW */
3036 mmu_idx
= ARMMMUIdx_S1E3
;
3039 mmu_idx
= ARMMMUIdx_S1NSE1
;
3042 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
3045 g_assert_not_reached();
3049 /* stage 1 current state PL0: ATS1CUR, ATS1CUW */
3052 mmu_idx
= ARMMMUIdx_S1SE0
;
3055 mmu_idx
= ARMMMUIdx_S1NSE0
;
3058 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
3061 g_assert_not_reached();
3065 /* stage 1+2 NonSecure PL1: ATS12NSOPR, ATS12NSOPW */
3066 mmu_idx
= ARMMMUIdx_S12NSE1
;
3069 /* stage 1+2 NonSecure PL0: ATS12NSOUR, ATS12NSOUW */
3070 mmu_idx
= ARMMMUIdx_S12NSE0
;
3073 g_assert_not_reached();
3076 par64
= do_ats_write(env
, value
, access_type
, mmu_idx
);
3078 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
3081 static void ats1h_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3084 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
3087 par64
= do_ats_write(env
, value
, access_type
, ARMMMUIdx_S1E2
);
3089 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
3092 static CPAccessResult
at_s1e2_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3095 if (arm_current_el(env
) == 3 && !(env
->cp15
.scr_el3
& SCR_NS
)) {
3096 return CP_ACCESS_TRAP
;
3098 return CP_ACCESS_OK
;
3101 static void ats_write64(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3104 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
3106 int secure
= arm_is_secure_below_el3(env
);
3108 switch (ri
->opc2
& 6) {
3111 case 0: /* AT S1E1R, AT S1E1W */
3112 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
3114 case 4: /* AT S1E2R, AT S1E2W */
3115 mmu_idx
= ARMMMUIdx_S1E2
;
3117 case 6: /* AT S1E3R, AT S1E3W */
3118 mmu_idx
= ARMMMUIdx_S1E3
;
3121 g_assert_not_reached();
3124 case 2: /* AT S1E0R, AT S1E0W */
3125 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
3127 case 4: /* AT S12E1R, AT S12E1W */
3128 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S12NSE1
;
3130 case 6: /* AT S12E0R, AT S12E0W */
3131 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S12NSE0
;
3134 g_assert_not_reached();
3137 env
->cp15
.par_el
[1] = do_ats_write(env
, value
, access_type
, mmu_idx
);
3141 static const ARMCPRegInfo vapa_cp_reginfo
[] = {
3142 { .name
= "PAR", .cp
= 15, .crn
= 7, .crm
= 4, .opc1
= 0, .opc2
= 0,
3143 .access
= PL1_RW
, .resetvalue
= 0,
3144 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.par_s
),
3145 offsetoflow32(CPUARMState
, cp15
.par_ns
) },
3146 .writefn
= par_write
},
3147 #ifndef CONFIG_USER_ONLY
3148 /* This underdecoding is safe because the reginfo is NO_RAW. */
3149 { .name
= "ATS", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= CP_ANY
,
3150 .access
= PL1_W
, .accessfn
= ats_access
,
3151 .writefn
= ats_write
, .type
= ARM_CP_NO_RAW
},
3156 /* Return basic MPU access permission bits. */
3157 static uint32_t simple_mpu_ap_bits(uint32_t val
)
3164 for (i
= 0; i
< 16; i
+= 2) {
3165 ret
|= (val
>> i
) & mask
;
3171 /* Pad basic MPU access permission bits to extended format. */
3172 static uint32_t extended_mpu_ap_bits(uint32_t val
)
3179 for (i
= 0; i
< 16; i
+= 2) {
3180 ret
|= (val
& mask
) << i
;
3186 static void pmsav5_data_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3189 env
->cp15
.pmsav5_data_ap
= extended_mpu_ap_bits(value
);
3192 static uint64_t pmsav5_data_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3194 return simple_mpu_ap_bits(env
->cp15
.pmsav5_data_ap
);
3197 static void pmsav5_insn_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3200 env
->cp15
.pmsav5_insn_ap
= extended_mpu_ap_bits(value
);
3203 static uint64_t pmsav5_insn_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3205 return simple_mpu_ap_bits(env
->cp15
.pmsav5_insn_ap
);
3208 static uint64_t pmsav7_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3210 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
3216 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
3220 static void pmsav7_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3223 ARMCPU
*cpu
= env_archcpu(env
);
3224 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
3230 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
3231 tlb_flush(CPU(cpu
)); /* Mappings may have changed - purge! */
3235 static void pmsav7_rgnr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3238 ARMCPU
*cpu
= env_archcpu(env
);
3239 uint32_t nrgs
= cpu
->pmsav7_dregion
;
3241 if (value
>= nrgs
) {
3242 qemu_log_mask(LOG_GUEST_ERROR
,
3243 "PMSAv7 RGNR write >= # supported regions, %" PRIu32
3244 " > %" PRIu32
"\n", (uint32_t)value
, nrgs
);
3248 raw_write(env
, ri
, value
);
3251 static const ARMCPRegInfo pmsav7_cp_reginfo
[] = {
3252 /* Reset for all these registers is handled in arm_cpu_reset(),
3253 * because the PMSAv7 is also used by M-profile CPUs, which do
3254 * not register cpregs but still need the state to be reset.
3256 { .name
= "DRBAR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 0,
3257 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
3258 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drbar
),
3259 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
3260 .resetfn
= arm_cp_reset_ignore
},
3261 { .name
= "DRSR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 2,
3262 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
3263 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drsr
),
3264 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
3265 .resetfn
= arm_cp_reset_ignore
},
3266 { .name
= "DRACR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 4,
3267 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
3268 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.dracr
),
3269 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
3270 .resetfn
= arm_cp_reset_ignore
},
3271 { .name
= "RGNR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 2, .opc2
= 0,
3273 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.rnr
[M_REG_NS
]),
3274 .writefn
= pmsav7_rgnr_write
,
3275 .resetfn
= arm_cp_reset_ignore
},
3279 static const ARMCPRegInfo pmsav5_cp_reginfo
[] = {
3280 { .name
= "DATA_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
3281 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
3282 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
3283 .readfn
= pmsav5_data_ap_read
, .writefn
= pmsav5_data_ap_write
, },
3284 { .name
= "INSN_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
3285 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
3286 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
3287 .readfn
= pmsav5_insn_ap_read
, .writefn
= pmsav5_insn_ap_write
, },
3288 { .name
= "DATA_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 2,
3290 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
3292 { .name
= "INSN_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 3,
3294 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
3296 { .name
= "DCACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
3298 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_data
), .resetvalue
= 0, },
3299 { .name
= "ICACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 1,
3301 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_insn
), .resetvalue
= 0, },
3302 /* Protection region base and size registers */
3303 { .name
= "946_PRBS0", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0,
3304 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3305 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[0]) },
3306 { .name
= "946_PRBS1", .cp
= 15, .crn
= 6, .crm
= 1, .opc1
= 0,
3307 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3308 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[1]) },
3309 { .name
= "946_PRBS2", .cp
= 15, .crn
= 6, .crm
= 2, .opc1
= 0,
3310 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3311 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[2]) },
3312 { .name
= "946_PRBS3", .cp
= 15, .crn
= 6, .crm
= 3, .opc1
= 0,
3313 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3314 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[3]) },
3315 { .name
= "946_PRBS4", .cp
= 15, .crn
= 6, .crm
= 4, .opc1
= 0,
3316 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3317 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[4]) },
3318 { .name
= "946_PRBS5", .cp
= 15, .crn
= 6, .crm
= 5, .opc1
= 0,
3319 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3320 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[5]) },
3321 { .name
= "946_PRBS6", .cp
= 15, .crn
= 6, .crm
= 6, .opc1
= 0,
3322 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3323 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[6]) },
3324 { .name
= "946_PRBS7", .cp
= 15, .crn
= 6, .crm
= 7, .opc1
= 0,
3325 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
3326 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[7]) },
3330 static void vmsa_ttbcr_raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3333 TCR
*tcr
= raw_ptr(env
, ri
);
3334 int maskshift
= extract32(value
, 0, 3);
3336 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
3337 if (arm_feature(env
, ARM_FEATURE_LPAE
) && (value
& TTBCR_EAE
)) {
3338 /* Pre ARMv8 bits [21:19], [15:14] and [6:3] are UNK/SBZP when
3339 * using Long-desciptor translation table format */
3340 value
&= ~((7 << 19) | (3 << 14) | (0xf << 3));
3341 } else if (arm_feature(env
, ARM_FEATURE_EL3
)) {
3342 /* In an implementation that includes the Security Extensions
3343 * TTBCR has additional fields PD0 [4] and PD1 [5] for
3344 * Short-descriptor translation table format.
3346 value
&= TTBCR_PD1
| TTBCR_PD0
| TTBCR_N
;
3352 /* Update the masks corresponding to the TCR bank being written
3353 * Note that we always calculate mask and base_mask, but
3354 * they are only used for short-descriptor tables (ie if EAE is 0);
3355 * for long-descriptor tables the TCR fields are used differently
3356 * and the mask and base_mask values are meaningless.
3358 tcr
->raw_tcr
= value
;
3359 tcr
->mask
= ~(((uint32_t)0xffffffffu
) >> maskshift
);
3360 tcr
->base_mask
= ~((uint32_t)0x3fffu
>> maskshift
);
3363 static void vmsa_ttbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3366 ARMCPU
*cpu
= env_archcpu(env
);
3367 TCR
*tcr
= raw_ptr(env
, ri
);
3369 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
3370 /* With LPAE the TTBCR could result in a change of ASID
3371 * via the TTBCR.A1 bit, so do a TLB flush.
3373 tlb_flush(CPU(cpu
));
3375 /* Preserve the high half of TCR_EL1, set via TTBCR2. */
3376 value
= deposit64(tcr
->raw_tcr
, 0, 32, value
);
3377 vmsa_ttbcr_raw_write(env
, ri
, value
);
3380 static void vmsa_ttbcr_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3382 TCR
*tcr
= raw_ptr(env
, ri
);
3384 /* Reset both the TCR as well as the masks corresponding to the bank of
3385 * the TCR being reset.
3389 tcr
->base_mask
= 0xffffc000u
;
3392 static void vmsa_tcr_el1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3395 ARMCPU
*cpu
= env_archcpu(env
);
3396 TCR
*tcr
= raw_ptr(env
, ri
);
3398 /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
3399 tlb_flush(CPU(cpu
));
3400 tcr
->raw_tcr
= value
;
3403 static void vmsa_ttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3406 /* If the ASID changes (with a 64-bit write), we must flush the TLB. */
3407 if (cpreg_field_is_64bit(ri
) &&
3408 extract64(raw_read(env
, ri
) ^ value
, 48, 16) != 0) {
3409 ARMCPU
*cpu
= env_archcpu(env
);
3410 tlb_flush(CPU(cpu
));
3412 raw_write(env
, ri
, value
);
3415 static void vttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3418 ARMCPU
*cpu
= env_archcpu(env
);
3419 CPUState
*cs
= CPU(cpu
);
3421 /* Accesses to VTTBR may change the VMID so we must flush the TLB. */
3422 if (raw_read(env
, ri
) != value
) {
3423 tlb_flush_by_mmuidx(cs
,
3424 ARMMMUIdxBit_S12NSE1
|
3425 ARMMMUIdxBit_S12NSE0
|
3427 raw_write(env
, ri
, value
);
3431 static const ARMCPRegInfo vmsa_pmsa_cp_reginfo
[] = {
3432 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
3433 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
3434 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dfsr_s
),
3435 offsetoflow32(CPUARMState
, cp15
.dfsr_ns
) }, },
3436 { .name
= "IFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
3437 .access
= PL1_RW
, .resetvalue
= 0,
3438 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.ifsr_s
),
3439 offsetoflow32(CPUARMState
, cp15
.ifsr_ns
) } },
3440 { .name
= "DFAR", .cp
= 15, .opc1
= 0, .crn
= 6, .crm
= 0, .opc2
= 0,
3441 .access
= PL1_RW
, .resetvalue
= 0,
3442 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.dfar_s
),
3443 offsetof(CPUARMState
, cp15
.dfar_ns
) } },
3444 { .name
= "FAR_EL1", .state
= ARM_CP_STATE_AA64
,
3445 .opc0
= 3, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 0,
3446 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[1]),
3451 static const ARMCPRegInfo vmsa_cp_reginfo
[] = {
3452 { .name
= "ESR_EL1", .state
= ARM_CP_STATE_AA64
,
3453 .opc0
= 3, .crn
= 5, .crm
= 2, .opc1
= 0, .opc2
= 0,
3455 .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[1]), .resetvalue
= 0, },
3456 { .name
= "TTBR0_EL1", .state
= ARM_CP_STATE_BOTH
,
3457 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 0,
3458 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
3459 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
3460 offsetof(CPUARMState
, cp15
.ttbr0_ns
) } },
3461 { .name
= "TTBR1_EL1", .state
= ARM_CP_STATE_BOTH
,
3462 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 1,
3463 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
3464 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
3465 offsetof(CPUARMState
, cp15
.ttbr1_ns
) } },
3466 { .name
= "TCR_EL1", .state
= ARM_CP_STATE_AA64
,
3467 .opc0
= 3, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
3468 .access
= PL1_RW
, .writefn
= vmsa_tcr_el1_write
,
3469 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= raw_write
,
3470 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[1]) },
3471 { .name
= "TTBCR", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
3472 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
, .writefn
= vmsa_ttbcr_write
,
3473 .raw_writefn
= vmsa_ttbcr_raw_write
,
3474 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tcr_el
[3]),
3475 offsetoflow32(CPUARMState
, cp15
.tcr_el
[1])} },
3479 /* Note that unlike TTBCR, writing to TTBCR2 does not require flushing
3480 * qemu tlbs nor adjusting cached masks.
3482 static const ARMCPRegInfo ttbcr2_reginfo
= {
3483 .name
= "TTBCR2", .cp
= 15, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 3,
3484 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
3485 .bank_fieldoffsets
= { offsetofhigh32(CPUARMState
, cp15
.tcr_el
[3]),
3486 offsetofhigh32(CPUARMState
, cp15
.tcr_el
[1]) },
3489 static void omap_ticonfig_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3492 env
->cp15
.c15_ticonfig
= value
& 0xe7;
3493 /* The OS_TYPE bit in this register changes the reported CPUID! */
3494 env
->cp15
.c0_cpuid
= (value
& (1 << 5)) ?
3495 ARM_CPUID_TI915T
: ARM_CPUID_TI925T
;
3498 static void omap_threadid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3501 env
->cp15
.c15_threadid
= value
& 0xffff;
3504 static void omap_wfi_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3507 /* Wait-for-interrupt (deprecated) */
3508 cpu_interrupt(env_cpu(env
), CPU_INTERRUPT_HALT
);
3511 static void omap_cachemaint_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3514 /* On OMAP there are registers indicating the max/min index of dcache lines
3515 * containing a dirty line; cache flush operations have to reset these.
3517 env
->cp15
.c15_i_max
= 0x000;
3518 env
->cp15
.c15_i_min
= 0xff0;
3521 static const ARMCPRegInfo omap_cp_reginfo
[] = {
3522 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= CP_ANY
,
3523 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_OVERRIDE
,
3524 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.esr_el
[1]),
3526 { .name
= "", .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 0, .opc2
= 0,
3527 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
3528 { .name
= "TICONFIG", .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0,
3530 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_ticonfig
), .resetvalue
= 0,
3531 .writefn
= omap_ticonfig_write
},
3532 { .name
= "IMAX", .cp
= 15, .crn
= 15, .crm
= 2, .opc1
= 0, .opc2
= 0,
3534 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_max
), .resetvalue
= 0, },
3535 { .name
= "IMIN", .cp
= 15, .crn
= 15, .crm
= 3, .opc1
= 0, .opc2
= 0,
3536 .access
= PL1_RW
, .resetvalue
= 0xff0,
3537 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_min
) },
3538 { .name
= "THREADID", .cp
= 15, .crn
= 15, .crm
= 4, .opc1
= 0, .opc2
= 0,
3540 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_threadid
), .resetvalue
= 0,
3541 .writefn
= omap_threadid_write
},
3542 { .name
= "TI925T_STATUS", .cp
= 15, .crn
= 15,
3543 .crm
= 8, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
3544 .type
= ARM_CP_NO_RAW
,
3545 .readfn
= arm_cp_read_zero
, .writefn
= omap_wfi_write
, },
3546 /* TODO: Peripheral port remap register:
3547 * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
3548 * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
3551 { .name
= "OMAP_CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
3552 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
3553 .type
= ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
,
3554 .writefn
= omap_cachemaint_write
},
3555 { .name
= "C9", .cp
= 15, .crn
= 9,
3556 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
,
3557 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
, .resetvalue
= 0 },
3561 static void xscale_cpar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3564 env
->cp15
.c15_cpar
= value
& 0x3fff;
3567 static const ARMCPRegInfo xscale_cp_reginfo
[] = {
3568 { .name
= "XSCALE_CPAR",
3569 .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
3570 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_cpar
), .resetvalue
= 0,
3571 .writefn
= xscale_cpar_write
, },
3572 { .name
= "XSCALE_AUXCR",
3573 .cp
= 15, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 1, .access
= PL1_RW
,
3574 .fieldoffset
= offsetof(CPUARMState
, cp15
.c1_xscaleauxcr
),
3576 /* XScale specific cache-lockdown: since we have no cache we NOP these
3577 * and hope the guest does not really rely on cache behaviour.
3579 { .name
= "XSCALE_LOCK_ICACHE_LINE",
3580 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 0,
3581 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3582 { .name
= "XSCALE_UNLOCK_ICACHE",
3583 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 1,
3584 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3585 { .name
= "XSCALE_DCACHE_LOCK",
3586 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 0,
3587 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
3588 { .name
= "XSCALE_UNLOCK_DCACHE",
3589 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 1,
3590 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3594 static const ARMCPRegInfo dummy_c15_cp_reginfo
[] = {
3595 /* RAZ/WI the whole crn=15 space, when we don't have a more specific
3596 * implementation of this implementation-defined space.
3597 * Ideally this should eventually disappear in favour of actually
3598 * implementing the correct behaviour for all cores.
3600 { .name
= "C15_IMPDEF", .cp
= 15, .crn
= 15,
3601 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
3603 .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
| ARM_CP_OVERRIDE
,
3608 static const ARMCPRegInfo cache_dirty_status_cp_reginfo
[] = {
3609 /* Cache status: RAZ because we have no cache so it's always clean */
3610 { .name
= "CDSR", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 6,
3611 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
3616 static const ARMCPRegInfo cache_block_ops_cp_reginfo
[] = {
3617 /* We never have a a block transfer operation in progress */
3618 { .name
= "BXSR", .cp
= 15, .crn
= 7, .crm
= 12, .opc1
= 0, .opc2
= 4,
3619 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
3621 /* The cache ops themselves: these all NOP for QEMU */
3622 { .name
= "IICR", .cp
= 15, .crm
= 5, .opc1
= 0,
3623 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3624 { .name
= "IDCR", .cp
= 15, .crm
= 6, .opc1
= 0,
3625 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3626 { .name
= "CDCR", .cp
= 15, .crm
= 12, .opc1
= 0,
3627 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3628 { .name
= "PIR", .cp
= 15, .crm
= 12, .opc1
= 1,
3629 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3630 { .name
= "PDR", .cp
= 15, .crm
= 12, .opc1
= 2,
3631 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3632 { .name
= "CIDCR", .cp
= 15, .crm
= 14, .opc1
= 0,
3633 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
3637 static const ARMCPRegInfo cache_test_clean_cp_reginfo
[] = {
3638 /* The cache test-and-clean instructions always return (1 << 30)
3639 * to indicate that there are no dirty cache lines.
3641 { .name
= "TC_DCACHE", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 3,
3642 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
3643 .resetvalue
= (1 << 30) },
3644 { .name
= "TCI_DCACHE", .cp
= 15, .crn
= 7, .crm
= 14, .opc1
= 0, .opc2
= 3,
3645 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
3646 .resetvalue
= (1 << 30) },
3650 static const ARMCPRegInfo strongarm_cp_reginfo
[] = {
3651 /* Ignore ReadBuffer accesses */
3652 { .name
= "C9_READBUFFER", .cp
= 15, .crn
= 9,
3653 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
3654 .access
= PL1_RW
, .resetvalue
= 0,
3655 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
},
3659 static uint64_t midr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3661 ARMCPU
*cpu
= env_archcpu(env
);
3662 unsigned int cur_el
= arm_current_el(env
);
3663 bool secure
= arm_is_secure(env
);
3665 if (arm_feature(&cpu
->env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
3666 return env
->cp15
.vpidr_el2
;
3668 return raw_read(env
, ri
);
3671 static uint64_t mpidr_read_val(CPUARMState
*env
)
3673 ARMCPU
*cpu
= env_archcpu(env
);
3674 uint64_t mpidr
= cpu
->mp_affinity
;
3676 if (arm_feature(env
, ARM_FEATURE_V7MP
)) {
3677 mpidr
|= (1U << 31);
3678 /* Cores which are uniprocessor (non-coherent)
3679 * but still implement the MP extensions set
3680 * bit 30. (For instance, Cortex-R5).
3682 if (cpu
->mp_is_up
) {
3683 mpidr
|= (1u << 30);
3689 static uint64_t mpidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3691 unsigned int cur_el
= arm_current_el(env
);
3692 bool secure
= arm_is_secure(env
);
3694 if (arm_feature(env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
3695 return env
->cp15
.vmpidr_el2
;
3697 return mpidr_read_val(env
);
3700 static const ARMCPRegInfo lpae_cp_reginfo
[] = {
3702 { .name
= "AMAIR0", .state
= ARM_CP_STATE_BOTH
,
3703 .opc0
= 3, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 0,
3704 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
3706 /* AMAIR1 is mapped to AMAIR_EL1[63:32] */
3707 { .name
= "AMAIR1", .cp
= 15, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 1,
3708 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
3710 { .name
= "PAR", .cp
= 15, .crm
= 7, .opc1
= 0,
3711 .access
= PL1_RW
, .type
= ARM_CP_64BIT
, .resetvalue
= 0,
3712 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.par_s
),
3713 offsetof(CPUARMState
, cp15
.par_ns
)} },
3714 { .name
= "TTBR0", .cp
= 15, .crm
= 2, .opc1
= 0,
3715 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3716 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
3717 offsetof(CPUARMState
, cp15
.ttbr0_ns
) },
3718 .writefn
= vmsa_ttbr_write
, },
3719 { .name
= "TTBR1", .cp
= 15, .crm
= 2, .opc1
= 1,
3720 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3721 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
3722 offsetof(CPUARMState
, cp15
.ttbr1_ns
) },
3723 .writefn
= vmsa_ttbr_write
, },
3727 static uint64_t aa64_fpcr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3729 return vfp_get_fpcr(env
);
3732 static void aa64_fpcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3735 vfp_set_fpcr(env
, value
);
3738 static uint64_t aa64_fpsr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3740 return vfp_get_fpsr(env
);
3743 static void aa64_fpsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3746 vfp_set_fpsr(env
, value
);
3749 static CPAccessResult
aa64_daif_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3752 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UMA
)) {
3753 return CP_ACCESS_TRAP
;
3755 return CP_ACCESS_OK
;
3758 static void aa64_daif_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3761 env
->daif
= value
& PSTATE_DAIF
;
3764 static CPAccessResult
aa64_cacheop_access(CPUARMState
*env
,
3765 const ARMCPRegInfo
*ri
,
3768 /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
3769 * SCTLR_EL1.UCI is set.
3771 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCI
)) {
3772 return CP_ACCESS_TRAP
;
3774 return CP_ACCESS_OK
;
3777 /* See: D4.7.2 TLB maintenance requirements and the TLB maintenance instructions
3778 * Page D4-1736 (DDI0487A.b)
3781 static void tlbi_aa64_vmalle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3784 CPUState
*cs
= env_cpu(env
);
3785 bool sec
= arm_is_secure_below_el3(env
);
3788 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3789 ARMMMUIdxBit_S1SE1
|
3790 ARMMMUIdxBit_S1SE0
);
3792 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3793 ARMMMUIdxBit_S12NSE1
|
3794 ARMMMUIdxBit_S12NSE0
);
3798 static void tlbi_aa64_vmalle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3801 CPUState
*cs
= env_cpu(env
);
3803 if (tlb_force_broadcast(env
)) {
3804 tlbi_aa64_vmalle1is_write(env
, NULL
, value
);
3808 if (arm_is_secure_below_el3(env
)) {
3809 tlb_flush_by_mmuidx(cs
,
3810 ARMMMUIdxBit_S1SE1
|
3811 ARMMMUIdxBit_S1SE0
);
3813 tlb_flush_by_mmuidx(cs
,
3814 ARMMMUIdxBit_S12NSE1
|
3815 ARMMMUIdxBit_S12NSE0
);
3819 static void tlbi_aa64_alle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3822 /* Note that the 'ALL' scope must invalidate both stage 1 and
3823 * stage 2 translations, whereas most other scopes only invalidate
3824 * stage 1 translations.
3826 ARMCPU
*cpu
= env_archcpu(env
);
3827 CPUState
*cs
= CPU(cpu
);
3829 if (arm_is_secure_below_el3(env
)) {
3830 tlb_flush_by_mmuidx(cs
,
3831 ARMMMUIdxBit_S1SE1
|
3832 ARMMMUIdxBit_S1SE0
);
3834 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
3835 tlb_flush_by_mmuidx(cs
,
3836 ARMMMUIdxBit_S12NSE1
|
3837 ARMMMUIdxBit_S12NSE0
|
3840 tlb_flush_by_mmuidx(cs
,
3841 ARMMMUIdxBit_S12NSE1
|
3842 ARMMMUIdxBit_S12NSE0
);
3847 static void tlbi_aa64_alle2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3850 ARMCPU
*cpu
= env_archcpu(env
);
3851 CPUState
*cs
= CPU(cpu
);
3853 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
3856 static void tlbi_aa64_alle3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3859 ARMCPU
*cpu
= env_archcpu(env
);
3860 CPUState
*cs
= CPU(cpu
);
3862 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E3
);
3865 static void tlbi_aa64_alle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3868 /* Note that the 'ALL' scope must invalidate both stage 1 and
3869 * stage 2 translations, whereas most other scopes only invalidate
3870 * stage 1 translations.
3872 CPUState
*cs
= env_cpu(env
);
3873 bool sec
= arm_is_secure_below_el3(env
);
3874 bool has_el2
= arm_feature(env
, ARM_FEATURE_EL2
);
3877 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3878 ARMMMUIdxBit_S1SE1
|
3879 ARMMMUIdxBit_S1SE0
);
3880 } else if (has_el2
) {
3881 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3882 ARMMMUIdxBit_S12NSE1
|
3883 ARMMMUIdxBit_S12NSE0
|
3886 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3887 ARMMMUIdxBit_S12NSE1
|
3888 ARMMMUIdxBit_S12NSE0
);
3892 static void tlbi_aa64_alle2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3895 CPUState
*cs
= env_cpu(env
);
3897 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
3900 static void tlbi_aa64_alle3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3903 CPUState
*cs
= env_cpu(env
);
3905 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E3
);
3908 static void tlbi_aa64_vae2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3911 /* Invalidate by VA, EL2
3912 * Currently handles both VAE2 and VALE2, since we don't support
3913 * flush-last-level-only.
3915 ARMCPU
*cpu
= env_archcpu(env
);
3916 CPUState
*cs
= CPU(cpu
);
3917 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3919 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
3922 static void tlbi_aa64_vae3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3925 /* Invalidate by VA, EL3
3926 * Currently handles both VAE3 and VALE3, since we don't support
3927 * flush-last-level-only.
3929 ARMCPU
*cpu
= env_archcpu(env
);
3930 CPUState
*cs
= CPU(cpu
);
3931 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3933 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E3
);
3936 static void tlbi_aa64_vae1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3939 ARMCPU
*cpu
= env_archcpu(env
);
3940 CPUState
*cs
= CPU(cpu
);
3941 bool sec
= arm_is_secure_below_el3(env
);
3942 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3945 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3946 ARMMMUIdxBit_S1SE1
|
3947 ARMMMUIdxBit_S1SE0
);
3949 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3950 ARMMMUIdxBit_S12NSE1
|
3951 ARMMMUIdxBit_S12NSE0
);
3955 static void tlbi_aa64_vae1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3958 /* Invalidate by VA, EL1&0 (AArch64 version).
3959 * Currently handles all of VAE1, VAAE1, VAALE1 and VALE1,
3960 * since we don't support flush-for-specific-ASID-only or
3961 * flush-last-level-only.
3963 ARMCPU
*cpu
= env_archcpu(env
);
3964 CPUState
*cs
= CPU(cpu
);
3965 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3967 if (tlb_force_broadcast(env
)) {
3968 tlbi_aa64_vae1is_write(env
, NULL
, value
);
3972 if (arm_is_secure_below_el3(env
)) {
3973 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3974 ARMMMUIdxBit_S1SE1
|
3975 ARMMMUIdxBit_S1SE0
);
3977 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3978 ARMMMUIdxBit_S12NSE1
|
3979 ARMMMUIdxBit_S12NSE0
);
3983 static void tlbi_aa64_vae2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3986 CPUState
*cs
= env_cpu(env
);
3987 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3989 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3993 static void tlbi_aa64_vae3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3996 CPUState
*cs
= env_cpu(env
);
3997 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3999 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
4003 static void tlbi_aa64_ipas2e1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4006 /* Invalidate by IPA. This has to invalidate any structures that
4007 * contain only stage 2 translation information, but does not need
4008 * to apply to structures that contain combined stage 1 and stage 2
4009 * translation information.
4010 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
4012 ARMCPU
*cpu
= env_archcpu(env
);
4013 CPUState
*cs
= CPU(cpu
);
4016 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
4020 pageaddr
= sextract64(value
<< 12, 0, 48);
4022 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
4025 static void tlbi_aa64_ipas2e1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4028 CPUState
*cs
= env_cpu(env
);
4031 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
4035 pageaddr
= sextract64(value
<< 12, 0, 48);
4037 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
4041 static CPAccessResult
aa64_zva_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4044 /* We don't implement EL2, so the only control on DC ZVA is the
4045 * bit in the SCTLR which can prohibit access for EL0.
4047 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_DZE
)) {
4048 return CP_ACCESS_TRAP
;
4050 return CP_ACCESS_OK
;
4053 static uint64_t aa64_dczid_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4055 ARMCPU
*cpu
= env_archcpu(env
);
4056 int dzp_bit
= 1 << 4;
4058 /* DZP indicates whether DC ZVA access is allowed */
4059 if (aa64_zva_access(env
, NULL
, false) == CP_ACCESS_OK
) {
4062 return cpu
->dcz_blocksize
| dzp_bit
;
4065 static CPAccessResult
sp_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4068 if (!(env
->pstate
& PSTATE_SP
)) {
4069 /* Access to SP_EL0 is undefined if it's being used as
4070 * the stack pointer.
4072 return CP_ACCESS_TRAP_UNCATEGORIZED
;
4074 return CP_ACCESS_OK
;
4077 static uint64_t spsel_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4079 return env
->pstate
& PSTATE_SP
;
4082 static void spsel_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t val
)
4084 update_spsel(env
, val
);
4087 static void sctlr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4090 ARMCPU
*cpu
= env_archcpu(env
);
4092 if (raw_read(env
, ri
) == value
) {
4093 /* Skip the TLB flush if nothing actually changed; Linux likes
4094 * to do a lot of pointless SCTLR writes.
4099 if (arm_feature(env
, ARM_FEATURE_PMSA
) && !cpu
->has_mpu
) {
4100 /* M bit is RAZ/WI for PMSA with no MPU implemented */
4104 raw_write(env
, ri
, value
);
4105 /* ??? Lots of these bits are not implemented. */
4106 /* This may enable/disable the MMU, so do a TLB flush. */
4107 tlb_flush(CPU(cpu
));
4110 static CPAccessResult
fpexc32_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4113 if ((env
->cp15
.cptr_el
[2] & CPTR_TFP
) && arm_current_el(env
) == 2) {
4114 return CP_ACCESS_TRAP_FP_EL2
;
4116 if (env
->cp15
.cptr_el
[3] & CPTR_TFP
) {
4117 return CP_ACCESS_TRAP_FP_EL3
;
4119 return CP_ACCESS_OK
;
4122 static void sdcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4125 env
->cp15
.mdcr_el3
= value
& SDCR_VALID_MASK
;
4128 static const ARMCPRegInfo v8_cp_reginfo
[] = {
4129 /* Minimal set of EL0-visible registers. This will need to be expanded
4130 * significantly for system emulation of AArch64 CPUs.
4132 { .name
= "NZCV", .state
= ARM_CP_STATE_AA64
,
4133 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 2,
4134 .access
= PL0_RW
, .type
= ARM_CP_NZCV
},
4135 { .name
= "DAIF", .state
= ARM_CP_STATE_AA64
,
4136 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 2,
4137 .type
= ARM_CP_NO_RAW
,
4138 .access
= PL0_RW
, .accessfn
= aa64_daif_access
,
4139 .fieldoffset
= offsetof(CPUARMState
, daif
),
4140 .writefn
= aa64_daif_write
, .resetfn
= arm_cp_reset_ignore
},
4141 { .name
= "FPCR", .state
= ARM_CP_STATE_AA64
,
4142 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 4,
4143 .access
= PL0_RW
, .type
= ARM_CP_FPU
| ARM_CP_SUPPRESS_TB_END
,
4144 .readfn
= aa64_fpcr_read
, .writefn
= aa64_fpcr_write
},
4145 { .name
= "FPSR", .state
= ARM_CP_STATE_AA64
,
4146 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 4,
4147 .access
= PL0_RW
, .type
= ARM_CP_FPU
| ARM_CP_SUPPRESS_TB_END
,
4148 .readfn
= aa64_fpsr_read
, .writefn
= aa64_fpsr_write
},
4149 { .name
= "DCZID_EL0", .state
= ARM_CP_STATE_AA64
,
4150 .opc0
= 3, .opc1
= 3, .opc2
= 7, .crn
= 0, .crm
= 0,
4151 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
,
4152 .readfn
= aa64_dczid_read
},
4153 { .name
= "DC_ZVA", .state
= ARM_CP_STATE_AA64
,
4154 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 4, .opc2
= 1,
4155 .access
= PL0_W
, .type
= ARM_CP_DC_ZVA
,
4156 #ifndef CONFIG_USER_ONLY
4157 /* Avoid overhead of an access check that always passes in user-mode */
4158 .accessfn
= aa64_zva_access
,
4161 { .name
= "CURRENTEL", .state
= ARM_CP_STATE_AA64
,
4162 .opc0
= 3, .opc1
= 0, .opc2
= 2, .crn
= 4, .crm
= 2,
4163 .access
= PL1_R
, .type
= ARM_CP_CURRENTEL
},
4164 /* Cache ops: all NOPs since we don't emulate caches */
4165 { .name
= "IC_IALLUIS", .state
= ARM_CP_STATE_AA64
,
4166 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
4167 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4168 { .name
= "IC_IALLU", .state
= ARM_CP_STATE_AA64
,
4169 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
4170 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4171 { .name
= "IC_IVAU", .state
= ARM_CP_STATE_AA64
,
4172 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 5, .opc2
= 1,
4173 .access
= PL0_W
, .type
= ARM_CP_NOP
,
4174 .accessfn
= aa64_cacheop_access
},
4175 { .name
= "DC_IVAC", .state
= ARM_CP_STATE_AA64
,
4176 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
4177 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4178 { .name
= "DC_ISW", .state
= ARM_CP_STATE_AA64
,
4179 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
4180 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4181 { .name
= "DC_CVAC", .state
= ARM_CP_STATE_AA64
,
4182 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 10, .opc2
= 1,
4183 .access
= PL0_W
, .type
= ARM_CP_NOP
,
4184 .accessfn
= aa64_cacheop_access
},
4185 { .name
= "DC_CSW", .state
= ARM_CP_STATE_AA64
,
4186 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
4187 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4188 { .name
= "DC_CVAU", .state
= ARM_CP_STATE_AA64
,
4189 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 11, .opc2
= 1,
4190 .access
= PL0_W
, .type
= ARM_CP_NOP
,
4191 .accessfn
= aa64_cacheop_access
},
4192 { .name
= "DC_CIVAC", .state
= ARM_CP_STATE_AA64
,
4193 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 14, .opc2
= 1,
4194 .access
= PL0_W
, .type
= ARM_CP_NOP
,
4195 .accessfn
= aa64_cacheop_access
},
4196 { .name
= "DC_CISW", .state
= ARM_CP_STATE_AA64
,
4197 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
4198 .access
= PL1_W
, .type
= ARM_CP_NOP
},
4199 /* TLBI operations */
4200 { .name
= "TLBI_VMALLE1IS", .state
= ARM_CP_STATE_AA64
,
4201 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
4202 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4203 .writefn
= tlbi_aa64_vmalle1is_write
},
4204 { .name
= "TLBI_VAE1IS", .state
= ARM_CP_STATE_AA64
,
4205 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
4206 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4207 .writefn
= tlbi_aa64_vae1is_write
},
4208 { .name
= "TLBI_ASIDE1IS", .state
= ARM_CP_STATE_AA64
,
4209 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
4210 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4211 .writefn
= tlbi_aa64_vmalle1is_write
},
4212 { .name
= "TLBI_VAAE1IS", .state
= ARM_CP_STATE_AA64
,
4213 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
4214 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4215 .writefn
= tlbi_aa64_vae1is_write
},
4216 { .name
= "TLBI_VALE1IS", .state
= ARM_CP_STATE_AA64
,
4217 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
4218 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4219 .writefn
= tlbi_aa64_vae1is_write
},
4220 { .name
= "TLBI_VAALE1IS", .state
= ARM_CP_STATE_AA64
,
4221 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
4222 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4223 .writefn
= tlbi_aa64_vae1is_write
},
4224 { .name
= "TLBI_VMALLE1", .state
= ARM_CP_STATE_AA64
,
4225 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
4226 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4227 .writefn
= tlbi_aa64_vmalle1_write
},
4228 { .name
= "TLBI_VAE1", .state
= ARM_CP_STATE_AA64
,
4229 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
4230 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4231 .writefn
= tlbi_aa64_vae1_write
},
4232 { .name
= "TLBI_ASIDE1", .state
= ARM_CP_STATE_AA64
,
4233 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
4234 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4235 .writefn
= tlbi_aa64_vmalle1_write
},
4236 { .name
= "TLBI_VAAE1", .state
= ARM_CP_STATE_AA64
,
4237 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
4238 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4239 .writefn
= tlbi_aa64_vae1_write
},
4240 { .name
= "TLBI_VALE1", .state
= ARM_CP_STATE_AA64
,
4241 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
4242 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4243 .writefn
= tlbi_aa64_vae1_write
},
4244 { .name
= "TLBI_VAALE1", .state
= ARM_CP_STATE_AA64
,
4245 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
4246 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4247 .writefn
= tlbi_aa64_vae1_write
},
4248 { .name
= "TLBI_IPAS2E1IS", .state
= ARM_CP_STATE_AA64
,
4249 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
4250 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4251 .writefn
= tlbi_aa64_ipas2e1is_write
},
4252 { .name
= "TLBI_IPAS2LE1IS", .state
= ARM_CP_STATE_AA64
,
4253 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
4254 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4255 .writefn
= tlbi_aa64_ipas2e1is_write
},
4256 { .name
= "TLBI_ALLE1IS", .state
= ARM_CP_STATE_AA64
,
4257 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
4258 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4259 .writefn
= tlbi_aa64_alle1is_write
},
4260 { .name
= "TLBI_VMALLS12E1IS", .state
= ARM_CP_STATE_AA64
,
4261 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 6,
4262 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4263 .writefn
= tlbi_aa64_alle1is_write
},
4264 { .name
= "TLBI_IPAS2E1", .state
= ARM_CP_STATE_AA64
,
4265 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
4266 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4267 .writefn
= tlbi_aa64_ipas2e1_write
},
4268 { .name
= "TLBI_IPAS2LE1", .state
= ARM_CP_STATE_AA64
,
4269 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
4270 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4271 .writefn
= tlbi_aa64_ipas2e1_write
},
4272 { .name
= "TLBI_ALLE1", .state
= ARM_CP_STATE_AA64
,
4273 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
4274 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4275 .writefn
= tlbi_aa64_alle1_write
},
4276 { .name
= "TLBI_VMALLS12E1", .state
= ARM_CP_STATE_AA64
,
4277 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 6,
4278 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4279 .writefn
= tlbi_aa64_alle1is_write
},
4280 #ifndef CONFIG_USER_ONLY
4281 /* 64 bit address translation operations */
4282 { .name
= "AT_S1E1R", .state
= ARM_CP_STATE_AA64
,
4283 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 0,
4284 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4285 { .name
= "AT_S1E1W", .state
= ARM_CP_STATE_AA64
,
4286 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 1,
4287 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4288 { .name
= "AT_S1E0R", .state
= ARM_CP_STATE_AA64
,
4289 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 2,
4290 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4291 { .name
= "AT_S1E0W", .state
= ARM_CP_STATE_AA64
,
4292 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 3,
4293 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4294 { .name
= "AT_S12E1R", .state
= ARM_CP_STATE_AA64
,
4295 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 4,
4296 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4297 { .name
= "AT_S12E1W", .state
= ARM_CP_STATE_AA64
,
4298 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 5,
4299 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4300 { .name
= "AT_S12E0R", .state
= ARM_CP_STATE_AA64
,
4301 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 6,
4302 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4303 { .name
= "AT_S12E0W", .state
= ARM_CP_STATE_AA64
,
4304 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 7,
4305 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4306 /* AT S1E2* are elsewhere as they UNDEF from EL3 if EL2 is not present */
4307 { .name
= "AT_S1E3R", .state
= ARM_CP_STATE_AA64
,
4308 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 0,
4309 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4310 { .name
= "AT_S1E3W", .state
= ARM_CP_STATE_AA64
,
4311 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 1,
4312 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4313 { .name
= "PAR_EL1", .state
= ARM_CP_STATE_AA64
,
4314 .type
= ARM_CP_ALIAS
,
4315 .opc0
= 3, .opc1
= 0, .crn
= 7, .crm
= 4, .opc2
= 0,
4316 .access
= PL1_RW
, .resetvalue
= 0,
4317 .fieldoffset
= offsetof(CPUARMState
, cp15
.par_el
[1]),
4318 .writefn
= par_write
},
4320 /* TLB invalidate last level of translation table walk */
4321 { .name
= "TLBIMVALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
4322 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
4323 { .name
= "TLBIMVAALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
4324 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
4325 .writefn
= tlbimvaa_is_write
},
4326 { .name
= "TLBIMVAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
4327 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
4328 { .name
= "TLBIMVAAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
4329 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
4330 { .name
= "TLBIMVALH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
4331 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4332 .writefn
= tlbimva_hyp_write
},
4333 { .name
= "TLBIMVALHIS",
4334 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
4335 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4336 .writefn
= tlbimva_hyp_is_write
},
4337 { .name
= "TLBIIPAS2",
4338 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
4339 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4340 .writefn
= tlbiipas2_write
},
4341 { .name
= "TLBIIPAS2IS",
4342 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
4343 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4344 .writefn
= tlbiipas2_is_write
},
4345 { .name
= "TLBIIPAS2L",
4346 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
4347 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4348 .writefn
= tlbiipas2_write
},
4349 { .name
= "TLBIIPAS2LIS",
4350 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
4351 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4352 .writefn
= tlbiipas2_is_write
},
4353 /* 32 bit cache operations */
4354 { .name
= "ICIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
4355 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4356 { .name
= "BPIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 6,
4357 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4358 { .name
= "ICIALLU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
4359 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4360 { .name
= "ICIMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 1,
4361 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4362 { .name
= "BPIALL", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 6,
4363 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4364 { .name
= "BPIMVA", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 7,
4365 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4366 { .name
= "DCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
4367 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4368 { .name
= "DCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
4369 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4370 { .name
= "DCCMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 1,
4371 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4372 { .name
= "DCCSW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
4373 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4374 { .name
= "DCCMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 11, .opc2
= 1,
4375 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4376 { .name
= "DCCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 1,
4377 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4378 { .name
= "DCCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
4379 .type
= ARM_CP_NOP
, .access
= PL1_W
},
4380 /* MMU Domain access control / MPU write buffer control */
4381 { .name
= "DACR", .cp
= 15, .opc1
= 0, .crn
= 3, .crm
= 0, .opc2
= 0,
4382 .access
= PL1_RW
, .resetvalue
= 0,
4383 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
4384 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
4385 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
4386 { .name
= "ELR_EL1", .state
= ARM_CP_STATE_AA64
,
4387 .type
= ARM_CP_ALIAS
,
4388 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 1,
4390 .fieldoffset
= offsetof(CPUARMState
, elr_el
[1]) },
4391 { .name
= "SPSR_EL1", .state
= ARM_CP_STATE_AA64
,
4392 .type
= ARM_CP_ALIAS
,
4393 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 0,
4395 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_SVC
]) },
4396 /* We rely on the access checks not allowing the guest to write to the
4397 * state field when SPSel indicates that it's being used as the stack
4400 { .name
= "SP_EL0", .state
= ARM_CP_STATE_AA64
,
4401 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 1, .opc2
= 0,
4402 .access
= PL1_RW
, .accessfn
= sp_el0_access
,
4403 .type
= ARM_CP_ALIAS
,
4404 .fieldoffset
= offsetof(CPUARMState
, sp_el
[0]) },
4405 { .name
= "SP_EL1", .state
= ARM_CP_STATE_AA64
,
4406 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 1, .opc2
= 0,
4407 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
4408 .fieldoffset
= offsetof(CPUARMState
, sp_el
[1]) },
4409 { .name
= "SPSel", .state
= ARM_CP_STATE_AA64
,
4410 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 2, .opc2
= 0,
4411 .type
= ARM_CP_NO_RAW
,
4412 .access
= PL1_RW
, .readfn
= spsel_read
, .writefn
= spsel_write
},
4413 { .name
= "FPEXC32_EL2", .state
= ARM_CP_STATE_AA64
,
4414 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 3, .opc2
= 0,
4415 .type
= ARM_CP_ALIAS
,
4416 .fieldoffset
= offsetof(CPUARMState
, vfp
.xregs
[ARM_VFP_FPEXC
]),
4417 .access
= PL2_RW
, .accessfn
= fpexc32_access
},
4418 { .name
= "DACR32_EL2", .state
= ARM_CP_STATE_AA64
,
4419 .opc0
= 3, .opc1
= 4, .crn
= 3, .crm
= 0, .opc2
= 0,
4420 .access
= PL2_RW
, .resetvalue
= 0,
4421 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
4422 .fieldoffset
= offsetof(CPUARMState
, cp15
.dacr32_el2
) },
4423 { .name
= "IFSR32_EL2", .state
= ARM_CP_STATE_AA64
,
4424 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 0, .opc2
= 1,
4425 .access
= PL2_RW
, .resetvalue
= 0,
4426 .fieldoffset
= offsetof(CPUARMState
, cp15
.ifsr32_el2
) },
4427 { .name
= "SPSR_IRQ", .state
= ARM_CP_STATE_AA64
,
4428 .type
= ARM_CP_ALIAS
,
4429 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 0,
4431 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_IRQ
]) },
4432 { .name
= "SPSR_ABT", .state
= ARM_CP_STATE_AA64
,
4433 .type
= ARM_CP_ALIAS
,
4434 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 1,
4436 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_ABT
]) },
4437 { .name
= "SPSR_UND", .state
= ARM_CP_STATE_AA64
,
4438 .type
= ARM_CP_ALIAS
,
4439 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 2,
4441 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_UND
]) },
4442 { .name
= "SPSR_FIQ", .state
= ARM_CP_STATE_AA64
,
4443 .type
= ARM_CP_ALIAS
,
4444 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 3,
4446 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_FIQ
]) },
4447 { .name
= "MDCR_EL3", .state
= ARM_CP_STATE_AA64
,
4448 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 3, .opc2
= 1,
4450 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el3
) },
4451 { .name
= "SDCR", .type
= ARM_CP_ALIAS
,
4452 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 1,
4453 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
4454 .writefn
= sdcr_write
,
4455 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.mdcr_el3
) },
4459 /* Used to describe the behaviour of EL2 regs when EL2 does not exist. */
4460 static const ARMCPRegInfo el3_no_el2_cp_reginfo
[] = {
4461 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_BOTH
,
4462 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
4464 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
},
4465 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4466 .type
= ARM_CP_NO_RAW
,
4467 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
4469 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4470 { .name
= "HACR_EL2", .state
= ARM_CP_STATE_BOTH
,
4471 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 7,
4472 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4473 { .name
= "ESR_EL2", .state
= ARM_CP_STATE_BOTH
,
4474 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 2, .opc2
= 0,
4476 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4477 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
4478 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
4479 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4480 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
4481 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
4482 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4484 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
4485 .cp
= 15, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
4486 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4487 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
4488 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
4489 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4491 { .name
= "HAMAIR1", .state
= ARM_CP_STATE_AA32
,
4492 .cp
= 15, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
4493 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4495 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
4496 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
4497 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4499 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
4500 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
4501 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4503 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4504 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
4505 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4506 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4507 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
4508 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
4509 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4510 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
4511 .cp
= 15, .opc1
= 6, .crm
= 2,
4512 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4513 .type
= ARM_CP_CONST
| ARM_CP_64BIT
, .resetvalue
= 0 },
4514 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
4515 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
4516 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4517 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
4518 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
4519 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4520 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
4521 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
4522 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4523 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
4524 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
4525 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4526 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
4527 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
4529 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4530 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
4531 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4532 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
4533 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
4534 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4535 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
4536 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
4538 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
4539 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
4540 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4541 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
4542 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
4544 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
4545 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
4546 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4547 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4548 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
4549 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4550 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4551 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
4552 .access
= PL2_RW
, .accessfn
= access_tda
,
4553 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4554 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_BOTH
,
4555 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
4556 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
4557 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4558 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
4559 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
4560 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4561 { .name
= "FAR_EL2", .state
= ARM_CP_STATE_BOTH
,
4562 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 0,
4563 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4564 { .name
= "HIFAR", .state
= ARM_CP_STATE_AA32
,
4565 .type
= ARM_CP_CONST
,
4566 .cp
= 15, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 2,
4567 .access
= PL2_RW
, .resetvalue
= 0 },
4571 /* Ditto, but for registers which exist in ARMv8 but not v7 */
4572 static const ARMCPRegInfo el3_no_el2_v8_cp_reginfo
[] = {
4573 { .name
= "HCR2", .state
= ARM_CP_STATE_AA32
,
4574 .cp
= 15, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 4,
4576 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4580 static void hcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
4582 ARMCPU
*cpu
= env_archcpu(env
);
4583 uint64_t valid_mask
= HCR_MASK
;
4585 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
4586 valid_mask
&= ~HCR_HCD
;
4587 } else if (cpu
->psci_conduit
!= QEMU_PSCI_CONDUIT_SMC
) {
4588 /* Architecturally HCR.TSC is RES0 if EL3 is not implemented.
4589 * However, if we're using the SMC PSCI conduit then QEMU is
4590 * effectively acting like EL3 firmware and so the guest at
4591 * EL2 should retain the ability to prevent EL1 from being
4592 * able to make SMC calls into the ersatz firmware, so in
4593 * that case HCR.TSC should be read/write.
4595 valid_mask
&= ~HCR_TSC
;
4597 if (cpu_isar_feature(aa64_lor
, cpu
)) {
4598 valid_mask
|= HCR_TLOR
;
4600 if (cpu_isar_feature(aa64_pauth
, cpu
)) {
4601 valid_mask
|= HCR_API
| HCR_APK
;
4604 /* Clear RES0 bits. */
4605 value
&= valid_mask
;
4607 /* These bits change the MMU setup:
4608 * HCR_VM enables stage 2 translation
4609 * HCR_PTW forbids certain page-table setups
4610 * HCR_DC Disables stage1 and enables stage2 translation
4612 if ((env
->cp15
.hcr_el2
^ value
) & (HCR_VM
| HCR_PTW
| HCR_DC
)) {
4613 tlb_flush(CPU(cpu
));
4615 env
->cp15
.hcr_el2
= value
;
4618 * Updates to VI and VF require us to update the status of
4619 * virtual interrupts, which are the logical OR of these bits
4620 * and the state of the input lines from the GIC. (This requires
4621 * that we have the iothread lock, which is done by marking the
4622 * reginfo structs as ARM_CP_IO.)
4623 * Note that if a write to HCR pends a VIRQ or VFIQ it is never
4624 * possible for it to be taken immediately, because VIRQ and
4625 * VFIQ are masked unless running at EL0 or EL1, and HCR
4626 * can only be written at EL2.
4628 g_assert(qemu_mutex_iothread_locked());
4629 arm_cpu_update_virq(cpu
);
4630 arm_cpu_update_vfiq(cpu
);
4633 static void hcr_writehigh(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4636 /* Handle HCR2 write, i.e. write to high half of HCR_EL2 */
4637 value
= deposit64(env
->cp15
.hcr_el2
, 32, 32, value
);
4638 hcr_write(env
, NULL
, value
);
4641 static void hcr_writelow(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4644 /* Handle HCR write, i.e. write to low half of HCR_EL2 */
4645 value
= deposit64(env
->cp15
.hcr_el2
, 0, 32, value
);
4646 hcr_write(env
, NULL
, value
);
4650 * Return the effective value of HCR_EL2.
4651 * Bits that are not included here:
4652 * RW (read from SCR_EL3.RW as needed)
4654 uint64_t arm_hcr_el2_eff(CPUARMState
*env
)
4656 uint64_t ret
= env
->cp15
.hcr_el2
;
4658 if (arm_is_secure_below_el3(env
)) {
4660 * "This register has no effect if EL2 is not enabled in the
4661 * current Security state". This is ARMv8.4-SecEL2 speak for
4662 * !(SCR_EL3.NS==1 || SCR_EL3.EEL2==1).
4664 * Prior to that, the language was "In an implementation that
4665 * includes EL3, when the value of SCR_EL3.NS is 0 the PE behaves
4666 * as if this field is 0 for all purposes other than a direct
4667 * read or write access of HCR_EL2". With lots of enumeration
4668 * on a per-field basis. In current QEMU, this is condition
4669 * is arm_is_secure_below_el3.
4671 * Since the v8.4 language applies to the entire register, and
4672 * appears to be backward compatible, use that.
4675 } else if (ret
& HCR_TGE
) {
4676 /* These bits are up-to-date as of ARMv8.4. */
4677 if (ret
& HCR_E2H
) {
4678 ret
&= ~(HCR_VM
| HCR_FMO
| HCR_IMO
| HCR_AMO
|
4679 HCR_BSU_MASK
| HCR_DC
| HCR_TWI
| HCR_TWE
|
4680 HCR_TID0
| HCR_TID2
| HCR_TPCP
| HCR_TPU
|
4681 HCR_TDZ
| HCR_CD
| HCR_ID
| HCR_MIOCNCE
);
4683 ret
|= HCR_FMO
| HCR_IMO
| HCR_AMO
;
4685 ret
&= ~(HCR_SWIO
| HCR_PTW
| HCR_VF
| HCR_VI
| HCR_VSE
|
4686 HCR_FB
| HCR_TID1
| HCR_TID3
| HCR_TSC
| HCR_TACR
|
4687 HCR_TSW
| HCR_TTLB
| HCR_TVM
| HCR_HCD
| HCR_TRVM
|
4694 static void cptr_el2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4698 * For A-profile AArch32 EL3, if NSACR.CP10
4699 * is 0 then HCPTR.{TCP11,TCP10} ignore writes and read as 1.
4701 if (arm_feature(env
, ARM_FEATURE_EL3
) && !arm_el_is_aa64(env
, 3) &&
4702 !arm_is_secure(env
) && !extract32(env
->cp15
.nsacr
, 10, 1)) {
4703 value
&= ~(0x3 << 10);
4704 value
|= env
->cp15
.cptr_el
[2] & (0x3 << 10);
4706 env
->cp15
.cptr_el
[2] = value
;
4709 static uint64_t cptr_el2_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4712 * For A-profile AArch32 EL3, if NSACR.CP10
4713 * is 0 then HCPTR.{TCP11,TCP10} ignore writes and read as 1.
4715 uint64_t value
= env
->cp15
.cptr_el
[2];
4717 if (arm_feature(env
, ARM_FEATURE_EL3
) && !arm_el_is_aa64(env
, 3) &&
4718 !arm_is_secure(env
) && !extract32(env
->cp15
.nsacr
, 10, 1)) {
4724 static const ARMCPRegInfo el2_cp_reginfo
[] = {
4725 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_AA64
,
4727 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
4728 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.hcr_el2
),
4729 .writefn
= hcr_write
},
4730 { .name
= "HCR", .state
= ARM_CP_STATE_AA32
,
4731 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
4732 .cp
= 15, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
4733 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.hcr_el2
),
4734 .writefn
= hcr_writelow
},
4735 { .name
= "HACR_EL2", .state
= ARM_CP_STATE_BOTH
,
4736 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 7,
4737 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4738 { .name
= "ELR_EL2", .state
= ARM_CP_STATE_AA64
,
4739 .type
= ARM_CP_ALIAS
,
4740 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 1,
4742 .fieldoffset
= offsetof(CPUARMState
, elr_el
[2]) },
4743 { .name
= "ESR_EL2", .state
= ARM_CP_STATE_BOTH
,
4744 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 2, .opc2
= 0,
4745 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[2]) },
4746 { .name
= "FAR_EL2", .state
= ARM_CP_STATE_BOTH
,
4747 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 0,
4748 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[2]) },
4749 { .name
= "HIFAR", .state
= ARM_CP_STATE_AA32
,
4750 .type
= ARM_CP_ALIAS
,
4751 .cp
= 15, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 2,
4753 .fieldoffset
= offsetofhigh32(CPUARMState
, cp15
.far_el
[2]) },
4754 { .name
= "SPSR_EL2", .state
= ARM_CP_STATE_AA64
,
4755 .type
= ARM_CP_ALIAS
,
4756 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 0,
4758 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_HYP
]) },
4759 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_BOTH
,
4760 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
4761 .access
= PL2_RW
, .writefn
= vbar_write
,
4762 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[2]),
4764 { .name
= "SP_EL2", .state
= ARM_CP_STATE_AA64
,
4765 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 1, .opc2
= 0,
4766 .access
= PL3_RW
, .type
= ARM_CP_ALIAS
,
4767 .fieldoffset
= offsetof(CPUARMState
, sp_el
[2]) },
4768 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
4769 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
4770 .access
= PL2_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
4771 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[2]),
4772 .readfn
= cptr_el2_read
, .writefn
= cptr_el2_write
},
4773 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
4774 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
4775 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[2]),
4777 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
4778 .cp
= 15, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
4779 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
4780 .fieldoffset
= offsetofhigh32(CPUARMState
, cp15
.mair_el
[2]) },
4781 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
4782 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
4783 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4785 /* HAMAIR1 is mapped to AMAIR_EL2[63:32] */
4786 { .name
= "HAMAIR1", .state
= ARM_CP_STATE_AA32
,
4787 .cp
= 15, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
4788 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4790 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
4791 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
4792 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4794 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
4795 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
4796 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
4798 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4799 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
4801 /* no .writefn needed as this can't cause an ASID change;
4802 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
4804 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[2]) },
4805 { .name
= "VTCR", .state
= ARM_CP_STATE_AA32
,
4806 .cp
= 15, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
4807 .type
= ARM_CP_ALIAS
,
4808 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4809 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
4810 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_AA64
,
4811 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
4813 /* no .writefn needed as this can't cause an ASID change;
4814 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
4816 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
4817 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
4818 .cp
= 15, .opc1
= 6, .crm
= 2,
4819 .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
4820 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4821 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
),
4822 .writefn
= vttbr_write
},
4823 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
4824 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
4825 .access
= PL2_RW
, .writefn
= vttbr_write
,
4826 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
) },
4827 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
4828 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
4829 .access
= PL2_RW
, .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
4830 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[2]) },
4831 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
4832 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
4833 .access
= PL2_RW
, .resetvalue
= 0,
4834 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[2]) },
4835 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
4836 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
4837 .access
= PL2_RW
, .resetvalue
= 0,
4838 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
4839 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
4840 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
4841 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
4842 { .name
= "TLBIALLNSNH",
4843 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
4844 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4845 .writefn
= tlbiall_nsnh_write
},
4846 { .name
= "TLBIALLNSNHIS",
4847 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
4848 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4849 .writefn
= tlbiall_nsnh_is_write
},
4850 { .name
= "TLBIALLH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
4851 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4852 .writefn
= tlbiall_hyp_write
},
4853 { .name
= "TLBIALLHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
4854 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4855 .writefn
= tlbiall_hyp_is_write
},
4856 { .name
= "TLBIMVAH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
4857 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4858 .writefn
= tlbimva_hyp_write
},
4859 { .name
= "TLBIMVAHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
4860 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4861 .writefn
= tlbimva_hyp_is_write
},
4862 { .name
= "TLBI_ALLE2", .state
= ARM_CP_STATE_AA64
,
4863 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
4864 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4865 .writefn
= tlbi_aa64_alle2_write
},
4866 { .name
= "TLBI_VAE2", .state
= ARM_CP_STATE_AA64
,
4867 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
4868 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4869 .writefn
= tlbi_aa64_vae2_write
},
4870 { .name
= "TLBI_VALE2", .state
= ARM_CP_STATE_AA64
,
4871 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
4872 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4873 .writefn
= tlbi_aa64_vae2_write
},
4874 { .name
= "TLBI_ALLE2IS", .state
= ARM_CP_STATE_AA64
,
4875 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
4876 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4877 .writefn
= tlbi_aa64_alle2is_write
},
4878 { .name
= "TLBI_VAE2IS", .state
= ARM_CP_STATE_AA64
,
4879 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
4880 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4881 .writefn
= tlbi_aa64_vae2is_write
},
4882 { .name
= "TLBI_VALE2IS", .state
= ARM_CP_STATE_AA64
,
4883 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
4884 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4885 .writefn
= tlbi_aa64_vae2is_write
},
4886 #ifndef CONFIG_USER_ONLY
4887 /* Unlike the other EL2-related AT operations, these must
4888 * UNDEF from EL3 if EL2 is not implemented, which is why we
4889 * define them here rather than with the rest of the AT ops.
4891 { .name
= "AT_S1E2R", .state
= ARM_CP_STATE_AA64
,
4892 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
4893 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
4894 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4895 { .name
= "AT_S1E2W", .state
= ARM_CP_STATE_AA64
,
4896 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
4897 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
4898 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4899 /* The AArch32 ATS1H* operations are CONSTRAINED UNPREDICTABLE
4900 * if EL2 is not implemented; we choose to UNDEF. Behaviour at EL3
4901 * with SCR.NS == 0 outside Monitor mode is UNPREDICTABLE; we choose
4902 * to behave as if SCR.NS was 1.
4904 { .name
= "ATS1HR", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
4906 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
4907 { .name
= "ATS1HW", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
4909 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
4910 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4911 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
4912 /* ARMv7 requires bit 0 and 1 to reset to 1. ARMv8 defines the
4913 * reset values as IMPDEF. We choose to reset to 3 to comply with
4914 * both ARMv7 and ARMv8.
4916 .access
= PL2_RW
, .resetvalue
= 3,
4917 .fieldoffset
= offsetof(CPUARMState
, cp15
.cnthctl_el2
) },
4918 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
4919 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
4920 .access
= PL2_RW
, .type
= ARM_CP_IO
, .resetvalue
= 0,
4921 .writefn
= gt_cntvoff_write
,
4922 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
4923 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
4924 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
| ARM_CP_IO
,
4925 .writefn
= gt_cntvoff_write
,
4926 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
4927 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
4928 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
4929 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
4930 .type
= ARM_CP_IO
, .access
= PL2_RW
,
4931 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
4932 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
4933 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
4934 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_IO
,
4935 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
4936 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
4937 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
4938 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL2_RW
,
4939 .resetfn
= gt_hyp_timer_reset
,
4940 .readfn
= gt_hyp_tval_read
, .writefn
= gt_hyp_tval_write
},
4941 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4943 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
4945 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].ctl
),
4947 .writefn
= gt_hyp_ctl_write
, .raw_writefn
= raw_write
},
4949 /* The only field of MDCR_EL2 that has a defined architectural reset value
4950 * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we
4951 * don't implement any PMU event counters, so using zero as a reset
4952 * value for MDCR_EL2 is okay
4954 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4955 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
4956 .access
= PL2_RW
, .resetvalue
= 0,
4957 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el2
), },
4958 { .name
= "HPFAR", .state
= ARM_CP_STATE_AA32
,
4959 .cp
= 15, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
4960 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4961 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
4962 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_AA64
,
4963 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
4965 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
4966 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
4967 .cp
= 15, .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
4969 .fieldoffset
= offsetof(CPUARMState
, cp15
.hstr_el2
) },
4973 static const ARMCPRegInfo el2_v8_cp_reginfo
[] = {
4974 { .name
= "HCR2", .state
= ARM_CP_STATE_AA32
,
4975 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
4976 .cp
= 15, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 4,
4978 .fieldoffset
= offsetofhigh32(CPUARMState
, cp15
.hcr_el2
),
4979 .writefn
= hcr_writehigh
},
4983 static CPAccessResult
nsacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4986 /* The NSACR is RW at EL3, and RO for NS EL1 and NS EL2.
4987 * At Secure EL1 it traps to EL3.
4989 if (arm_current_el(env
) == 3) {
4990 return CP_ACCESS_OK
;
4992 if (arm_is_secure_below_el3(env
)) {
4993 return CP_ACCESS_TRAP_EL3
;
4995 /* Accesses from EL1 NS and EL2 NS are UNDEF for write but allow reads. */
4997 return CP_ACCESS_OK
;
4999 return CP_ACCESS_TRAP_UNCATEGORIZED
;
5002 static const ARMCPRegInfo el3_cp_reginfo
[] = {
5003 { .name
= "SCR_EL3", .state
= ARM_CP_STATE_AA64
,
5004 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 0,
5005 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.scr_el3
),
5006 .resetvalue
= 0, .writefn
= scr_write
},
5007 { .name
= "SCR", .type
= ARM_CP_ALIAS
,
5008 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 0,
5009 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
5010 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.scr_el3
),
5011 .writefn
= scr_write
},
5012 { .name
= "SDER32_EL3", .state
= ARM_CP_STATE_AA64
,
5013 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 1,
5014 .access
= PL3_RW
, .resetvalue
= 0,
5015 .fieldoffset
= offsetof(CPUARMState
, cp15
.sder
) },
5017 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 1,
5018 .access
= PL3_RW
, .resetvalue
= 0,
5019 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.sder
) },
5020 { .name
= "MVBAR", .cp
= 15, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
5021 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
5022 .writefn
= vbar_write
, .resetvalue
= 0,
5023 .fieldoffset
= offsetof(CPUARMState
, cp15
.mvbar
) },
5024 { .name
= "TTBR0_EL3", .state
= ARM_CP_STATE_AA64
,
5025 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 0,
5026 .access
= PL3_RW
, .resetvalue
= 0,
5027 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[3]) },
5028 { .name
= "TCR_EL3", .state
= ARM_CP_STATE_AA64
,
5029 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 2,
5031 /* no .writefn needed as this can't cause an ASID change;
5032 * we must provide a .raw_writefn and .resetfn because we handle
5033 * reset and migration for the AArch32 TTBCR(S), which might be
5034 * using mask and base_mask.
5036 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= vmsa_ttbcr_raw_write
,
5037 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[3]) },
5038 { .name
= "ELR_EL3", .state
= ARM_CP_STATE_AA64
,
5039 .type
= ARM_CP_ALIAS
,
5040 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 1,
5042 .fieldoffset
= offsetof(CPUARMState
, elr_el
[3]) },
5043 { .name
= "ESR_EL3", .state
= ARM_CP_STATE_AA64
,
5044 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 2, .opc2
= 0,
5045 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[3]) },
5046 { .name
= "FAR_EL3", .state
= ARM_CP_STATE_AA64
,
5047 .opc0
= 3, .opc1
= 6, .crn
= 6, .crm
= 0, .opc2
= 0,
5048 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[3]) },
5049 { .name
= "SPSR_EL3", .state
= ARM_CP_STATE_AA64
,
5050 .type
= ARM_CP_ALIAS
,
5051 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 0,
5053 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_MON
]) },
5054 { .name
= "VBAR_EL3", .state
= ARM_CP_STATE_AA64
,
5055 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 0,
5056 .access
= PL3_RW
, .writefn
= vbar_write
,
5057 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[3]),
5059 { .name
= "CPTR_EL3", .state
= ARM_CP_STATE_AA64
,
5060 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 2,
5061 .access
= PL3_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
5062 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[3]) },
5063 { .name
= "TPIDR_EL3", .state
= ARM_CP_STATE_AA64
,
5064 .opc0
= 3, .opc1
= 6, .crn
= 13, .crm
= 0, .opc2
= 2,
5065 .access
= PL3_RW
, .resetvalue
= 0,
5066 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[3]) },
5067 { .name
= "AMAIR_EL3", .state
= ARM_CP_STATE_AA64
,
5068 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 3, .opc2
= 0,
5069 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
5071 { .name
= "AFSR0_EL3", .state
= ARM_CP_STATE_BOTH
,
5072 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 0,
5073 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
5075 { .name
= "AFSR1_EL3", .state
= ARM_CP_STATE_BOTH
,
5076 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 1,
5077 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
5079 { .name
= "TLBI_ALLE3IS", .state
= ARM_CP_STATE_AA64
,
5080 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 0,
5081 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5082 .writefn
= tlbi_aa64_alle3is_write
},
5083 { .name
= "TLBI_VAE3IS", .state
= ARM_CP_STATE_AA64
,
5084 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 1,
5085 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5086 .writefn
= tlbi_aa64_vae3is_write
},
5087 { .name
= "TLBI_VALE3IS", .state
= ARM_CP_STATE_AA64
,
5088 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 5,
5089 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5090 .writefn
= tlbi_aa64_vae3is_write
},
5091 { .name
= "TLBI_ALLE3", .state
= ARM_CP_STATE_AA64
,
5092 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 0,
5093 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5094 .writefn
= tlbi_aa64_alle3_write
},
5095 { .name
= "TLBI_VAE3", .state
= ARM_CP_STATE_AA64
,
5096 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 1,
5097 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5098 .writefn
= tlbi_aa64_vae3_write
},
5099 { .name
= "TLBI_VALE3", .state
= ARM_CP_STATE_AA64
,
5100 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 5,
5101 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
5102 .writefn
= tlbi_aa64_vae3_write
},
5106 static CPAccessResult
ctr_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5109 /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
5110 * but the AArch32 CTR has its own reginfo struct)
5112 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCT
)) {
5113 return CP_ACCESS_TRAP
;
5115 return CP_ACCESS_OK
;
5118 static void oslar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5121 /* Writes to OSLAR_EL1 may update the OS lock status, which can be
5122 * read via a bit in OSLSR_EL1.
5126 if (ri
->state
== ARM_CP_STATE_AA32
) {
5127 oslock
= (value
== 0xC5ACCE55);
5132 env
->cp15
.oslsr_el1
= deposit32(env
->cp15
.oslsr_el1
, 1, 1, oslock
);
5135 static const ARMCPRegInfo debug_cp_reginfo
[] = {
5136 /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
5137 * debug components. The AArch64 version of DBGDRAR is named MDRAR_EL1;
5138 * unlike DBGDRAR it is never accessible from EL0.
5139 * DBGDSAR is deprecated and must RAZ from v8 anyway, so it has no AArch64
5142 { .name
= "DBGDRAR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 0,
5143 .access
= PL0_R
, .accessfn
= access_tdra
,
5144 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5145 { .name
= "MDRAR_EL1", .state
= ARM_CP_STATE_AA64
,
5146 .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
5147 .access
= PL1_R
, .accessfn
= access_tdra
,
5148 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5149 { .name
= "DBGDSAR", .cp
= 14, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
5150 .access
= PL0_R
, .accessfn
= access_tdra
,
5151 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5152 /* Monitor debug system control register; the 32-bit alias is DBGDSCRext. */
5153 { .name
= "MDSCR_EL1", .state
= ARM_CP_STATE_BOTH
,
5154 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
5155 .access
= PL1_RW
, .accessfn
= access_tda
,
5156 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
),
5158 /* MDCCSR_EL0, aka DBGDSCRint. This is a read-only mirror of MDSCR_EL1.
5159 * We don't implement the configurable EL0 access.
5161 { .name
= "MDCCSR_EL0", .state
= ARM_CP_STATE_BOTH
,
5162 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
5163 .type
= ARM_CP_ALIAS
,
5164 .access
= PL1_R
, .accessfn
= access_tda
,
5165 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
), },
5166 { .name
= "OSLAR_EL1", .state
= ARM_CP_STATE_BOTH
,
5167 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 4,
5168 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
5169 .accessfn
= access_tdosa
,
5170 .writefn
= oslar_write
},
5171 { .name
= "OSLSR_EL1", .state
= ARM_CP_STATE_BOTH
,
5172 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 4,
5173 .access
= PL1_R
, .resetvalue
= 10,
5174 .accessfn
= access_tdosa
,
5175 .fieldoffset
= offsetof(CPUARMState
, cp15
.oslsr_el1
) },
5176 /* Dummy OSDLR_EL1: 32-bit Linux will read this */
5177 { .name
= "OSDLR_EL1", .state
= ARM_CP_STATE_BOTH
,
5178 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 4,
5179 .access
= PL1_RW
, .accessfn
= access_tdosa
,
5180 .type
= ARM_CP_NOP
},
5181 /* Dummy DBGVCR: Linux wants to clear this on startup, but we don't
5182 * implement vector catch debug events yet.
5185 .cp
= 14, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
5186 .access
= PL1_RW
, .accessfn
= access_tda
,
5187 .type
= ARM_CP_NOP
},
5188 /* Dummy DBGVCR32_EL2 (which is only for a 64-bit hypervisor
5189 * to save and restore a 32-bit guest's DBGVCR)
5191 { .name
= "DBGVCR32_EL2", .state
= ARM_CP_STATE_AA64
,
5192 .opc0
= 2, .opc1
= 4, .crn
= 0, .crm
= 7, .opc2
= 0,
5193 .access
= PL2_RW
, .accessfn
= access_tda
,
5194 .type
= ARM_CP_NOP
},
5195 /* Dummy MDCCINT_EL1, since we don't implement the Debug Communications
5196 * Channel but Linux may try to access this register. The 32-bit
5197 * alias is DBGDCCINT.
5199 { .name
= "MDCCINT_EL1", .state
= ARM_CP_STATE_BOTH
,
5200 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
5201 .access
= PL1_RW
, .accessfn
= access_tda
,
5202 .type
= ARM_CP_NOP
},
5206 static const ARMCPRegInfo debug_lpae_cp_reginfo
[] = {
5207 /* 64 bit access versions of the (dummy) debug registers */
5208 { .name
= "DBGDRAR", .cp
= 14, .crm
= 1, .opc1
= 0,
5209 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
5210 { .name
= "DBGDSAR", .cp
= 14, .crm
= 2, .opc1
= 0,
5211 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
5215 /* Return the exception level to which exceptions should be taken
5216 * via SVEAccessTrap. If an exception should be routed through
5217 * AArch64.AdvSIMDFPAccessTrap, return 0; fp_exception_el should
5218 * take care of raising that exception.
5219 * C.f. the ARM pseudocode function CheckSVEEnabled.
5221 int sve_exception_el(CPUARMState
*env
, int el
)
5223 #ifndef CONFIG_USER_ONLY
5225 bool disabled
= false;
5227 /* The CPACR.ZEN controls traps to EL1:
5228 * 0, 2 : trap EL0 and EL1 accesses
5229 * 1 : trap only EL0 accesses
5230 * 3 : trap no accesses
5232 if (!extract32(env
->cp15
.cpacr_el1
, 16, 1)) {
5234 } else if (!extract32(env
->cp15
.cpacr_el1
, 17, 1)) {
5239 return (arm_feature(env
, ARM_FEATURE_EL2
)
5240 && (arm_hcr_el2_eff(env
) & HCR_TGE
) ? 2 : 1);
5243 /* Check CPACR.FPEN. */
5244 if (!extract32(env
->cp15
.cpacr_el1
, 20, 1)) {
5246 } else if (!extract32(env
->cp15
.cpacr_el1
, 21, 1)) {
5254 /* CPTR_EL2. Since TZ and TFP are positive,
5255 * they will be zero when EL2 is not present.
5257 if (el
<= 2 && !arm_is_secure_below_el3(env
)) {
5258 if (env
->cp15
.cptr_el
[2] & CPTR_TZ
) {
5261 if (env
->cp15
.cptr_el
[2] & CPTR_TFP
) {
5266 /* CPTR_EL3. Since EZ is negative we must check for EL3. */
5267 if (arm_feature(env
, ARM_FEATURE_EL3
)
5268 && !(env
->cp15
.cptr_el
[3] & CPTR_EZ
)) {
5276 * Given that SVE is enabled, return the vector length for EL.
5278 uint32_t sve_zcr_len_for_el(CPUARMState
*env
, int el
)
5280 ARMCPU
*cpu
= env_archcpu(env
);
5281 uint32_t zcr_len
= cpu
->sve_max_vq
- 1;
5284 zcr_len
= MIN(zcr_len
, 0xf & (uint32_t)env
->vfp
.zcr_el
[1]);
5286 if (el
< 2 && arm_feature(env
, ARM_FEATURE_EL2
)) {
5287 zcr_len
= MIN(zcr_len
, 0xf & (uint32_t)env
->vfp
.zcr_el
[2]);
5289 if (el
< 3 && arm_feature(env
, ARM_FEATURE_EL3
)) {
5290 zcr_len
= MIN(zcr_len
, 0xf & (uint32_t)env
->vfp
.zcr_el
[3]);
5295 static void zcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5298 int cur_el
= arm_current_el(env
);
5299 int old_len
= sve_zcr_len_for_el(env
, cur_el
);
5302 /* Bits other than [3:0] are RAZ/WI. */
5303 raw_write(env
, ri
, value
& 0xf);
5306 * Because we arrived here, we know both FP and SVE are enabled;
5307 * otherwise we would have trapped access to the ZCR_ELn register.
5309 new_len
= sve_zcr_len_for_el(env
, cur_el
);
5310 if (new_len
< old_len
) {
5311 aarch64_sve_narrow_vq(env
, new_len
+ 1);
5315 static const ARMCPRegInfo zcr_el1_reginfo
= {
5316 .name
= "ZCR_EL1", .state
= ARM_CP_STATE_AA64
,
5317 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 2, .opc2
= 0,
5318 .access
= PL1_RW
, .type
= ARM_CP_SVE
,
5319 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[1]),
5320 .writefn
= zcr_write
, .raw_writefn
= raw_write
5323 static const ARMCPRegInfo zcr_el2_reginfo
= {
5324 .name
= "ZCR_EL2", .state
= ARM_CP_STATE_AA64
,
5325 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 2, .opc2
= 0,
5326 .access
= PL2_RW
, .type
= ARM_CP_SVE
,
5327 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[2]),
5328 .writefn
= zcr_write
, .raw_writefn
= raw_write
5331 static const ARMCPRegInfo zcr_no_el2_reginfo
= {
5332 .name
= "ZCR_EL2", .state
= ARM_CP_STATE_AA64
,
5333 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 2, .opc2
= 0,
5334 .access
= PL2_RW
, .type
= ARM_CP_SVE
,
5335 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
5338 static const ARMCPRegInfo zcr_el3_reginfo
= {
5339 .name
= "ZCR_EL3", .state
= ARM_CP_STATE_AA64
,
5340 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 2, .opc2
= 0,
5341 .access
= PL3_RW
, .type
= ARM_CP_SVE
,
5342 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[3]),
5343 .writefn
= zcr_write
, .raw_writefn
= raw_write
5346 void hw_watchpoint_update(ARMCPU
*cpu
, int n
)
5348 CPUARMState
*env
= &cpu
->env
;
5350 vaddr wvr
= env
->cp15
.dbgwvr
[n
];
5351 uint64_t wcr
= env
->cp15
.dbgwcr
[n
];
5353 int flags
= BP_CPU
| BP_STOP_BEFORE_ACCESS
;
5355 if (env
->cpu_watchpoint
[n
]) {
5356 cpu_watchpoint_remove_by_ref(CPU(cpu
), env
->cpu_watchpoint
[n
]);
5357 env
->cpu_watchpoint
[n
] = NULL
;
5360 if (!extract64(wcr
, 0, 1)) {
5361 /* E bit clear : watchpoint disabled */
5365 switch (extract64(wcr
, 3, 2)) {
5367 /* LSC 00 is reserved and must behave as if the wp is disabled */
5370 flags
|= BP_MEM_READ
;
5373 flags
|= BP_MEM_WRITE
;
5376 flags
|= BP_MEM_ACCESS
;
5380 /* Attempts to use both MASK and BAS fields simultaneously are
5381 * CONSTRAINED UNPREDICTABLE; we opt to ignore BAS in this case,
5382 * thus generating a watchpoint for every byte in the masked region.
5384 mask
= extract64(wcr
, 24, 4);
5385 if (mask
== 1 || mask
== 2) {
5386 /* Reserved values of MASK; we must act as if the mask value was
5387 * some non-reserved value, or as if the watchpoint were disabled.
5388 * We choose the latter.
5392 /* Watchpoint covers an aligned area up to 2GB in size */
5394 /* If masked bits in WVR are not zero it's CONSTRAINED UNPREDICTABLE
5395 * whether the watchpoint fires when the unmasked bits match; we opt
5396 * to generate the exceptions.
5400 /* Watchpoint covers bytes defined by the byte address select bits */
5401 int bas
= extract64(wcr
, 5, 8);
5405 /* This must act as if the watchpoint is disabled */
5409 if (extract64(wvr
, 2, 1)) {
5410 /* Deprecated case of an only 4-aligned address. BAS[7:4] are
5411 * ignored, and BAS[3:0] define which bytes to watch.
5415 /* The BAS bits are supposed to be programmed to indicate a contiguous
5416 * range of bytes. Otherwise it is CONSTRAINED UNPREDICTABLE whether
5417 * we fire for each byte in the word/doubleword addressed by the WVR.
5418 * We choose to ignore any non-zero bits after the first range of 1s.
5420 basstart
= ctz32(bas
);
5421 len
= cto32(bas
>> basstart
);
5425 cpu_watchpoint_insert(CPU(cpu
), wvr
, len
, flags
,
5426 &env
->cpu_watchpoint
[n
]);
5429 void hw_watchpoint_update_all(ARMCPU
*cpu
)
5432 CPUARMState
*env
= &cpu
->env
;
5434 /* Completely clear out existing QEMU watchpoints and our array, to
5435 * avoid possible stale entries following migration load.
5437 cpu_watchpoint_remove_all(CPU(cpu
), BP_CPU
);
5438 memset(env
->cpu_watchpoint
, 0, sizeof(env
->cpu_watchpoint
));
5440 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_watchpoint
); i
++) {
5441 hw_watchpoint_update(cpu
, i
);
5445 static void dbgwvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5448 ARMCPU
*cpu
= env_archcpu(env
);
5451 /* Bits [63:49] are hardwired to the value of bit [48]; that is, the
5452 * register reads and behaves as if values written are sign extended.
5453 * Bits [1:0] are RES0.
5455 value
= sextract64(value
, 0, 49) & ~3ULL;
5457 raw_write(env
, ri
, value
);
5458 hw_watchpoint_update(cpu
, i
);
5461 static void dbgwcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5464 ARMCPU
*cpu
= env_archcpu(env
);
5467 raw_write(env
, ri
, value
);
5468 hw_watchpoint_update(cpu
, i
);
5471 void hw_breakpoint_update(ARMCPU
*cpu
, int n
)
5473 CPUARMState
*env
= &cpu
->env
;
5474 uint64_t bvr
= env
->cp15
.dbgbvr
[n
];
5475 uint64_t bcr
= env
->cp15
.dbgbcr
[n
];
5480 if (env
->cpu_breakpoint
[n
]) {
5481 cpu_breakpoint_remove_by_ref(CPU(cpu
), env
->cpu_breakpoint
[n
]);
5482 env
->cpu_breakpoint
[n
] = NULL
;
5485 if (!extract64(bcr
, 0, 1)) {
5486 /* E bit clear : watchpoint disabled */
5490 bt
= extract64(bcr
, 20, 4);
5493 case 4: /* unlinked address mismatch (reserved if AArch64) */
5494 case 5: /* linked address mismatch (reserved if AArch64) */
5495 qemu_log_mask(LOG_UNIMP
,
5496 "arm: address mismatch breakpoint types not implemented\n");
5498 case 0: /* unlinked address match */
5499 case 1: /* linked address match */
5501 /* Bits [63:49] are hardwired to the value of bit [48]; that is,
5502 * we behave as if the register was sign extended. Bits [1:0] are
5503 * RES0. The BAS field is used to allow setting breakpoints on 16
5504 * bit wide instructions; it is CONSTRAINED UNPREDICTABLE whether
5505 * a bp will fire if the addresses covered by the bp and the addresses
5506 * covered by the insn overlap but the insn doesn't start at the
5507 * start of the bp address range. We choose to require the insn and
5508 * the bp to have the same address. The constraints on writing to
5509 * BAS enforced in dbgbcr_write mean we have only four cases:
5510 * 0b0000 => no breakpoint
5511 * 0b0011 => breakpoint on addr
5512 * 0b1100 => breakpoint on addr + 2
5513 * 0b1111 => breakpoint on addr
5514 * See also figure D2-3 in the v8 ARM ARM (DDI0487A.c).
5516 int bas
= extract64(bcr
, 5, 4);
5517 addr
= sextract64(bvr
, 0, 49) & ~3ULL;
5526 case 2: /* unlinked context ID match */
5527 case 8: /* unlinked VMID match (reserved if no EL2) */
5528 case 10: /* unlinked context ID and VMID match (reserved if no EL2) */
5529 qemu_log_mask(LOG_UNIMP
,
5530 "arm: unlinked context breakpoint types not implemented\n");
5532 case 9: /* linked VMID match (reserved if no EL2) */
5533 case 11: /* linked context ID and VMID match (reserved if no EL2) */
5534 case 3: /* linked context ID match */
5536 /* We must generate no events for Linked context matches (unless
5537 * they are linked to by some other bp/wp, which is handled in
5538 * updates for the linking bp/wp). We choose to also generate no events
5539 * for reserved values.
5544 cpu_breakpoint_insert(CPU(cpu
), addr
, flags
, &env
->cpu_breakpoint
[n
]);
5547 void hw_breakpoint_update_all(ARMCPU
*cpu
)
5550 CPUARMState
*env
= &cpu
->env
;
5552 /* Completely clear out existing QEMU breakpoints and our array, to
5553 * avoid possible stale entries following migration load.
5555 cpu_breakpoint_remove_all(CPU(cpu
), BP_CPU
);
5556 memset(env
->cpu_breakpoint
, 0, sizeof(env
->cpu_breakpoint
));
5558 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_breakpoint
); i
++) {
5559 hw_breakpoint_update(cpu
, i
);
5563 static void dbgbvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5566 ARMCPU
*cpu
= env_archcpu(env
);
5569 raw_write(env
, ri
, value
);
5570 hw_breakpoint_update(cpu
, i
);
5573 static void dbgbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5576 ARMCPU
*cpu
= env_archcpu(env
);
5579 /* BAS[3] is a read-only copy of BAS[2], and BAS[1] a read-only
5582 value
= deposit64(value
, 6, 1, extract64(value
, 5, 1));
5583 value
= deposit64(value
, 8, 1, extract64(value
, 7, 1));
5585 raw_write(env
, ri
, value
);
5586 hw_breakpoint_update(cpu
, i
);
5589 static void define_debug_regs(ARMCPU
*cpu
)
5591 /* Define v7 and v8 architectural debug registers.
5592 * These are just dummy implementations for now.
5595 int wrps
, brps
, ctx_cmps
;
5596 ARMCPRegInfo dbgdidr
= {
5597 .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
5598 .access
= PL0_R
, .accessfn
= access_tda
,
5599 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->dbgdidr
,
5602 /* Note that all these register fields hold "number of Xs minus 1". */
5603 brps
= extract32(cpu
->dbgdidr
, 24, 4);
5604 wrps
= extract32(cpu
->dbgdidr
, 28, 4);
5605 ctx_cmps
= extract32(cpu
->dbgdidr
, 20, 4);
5607 assert(ctx_cmps
<= brps
);
5609 /* The DBGDIDR and ID_AA64DFR0_EL1 define various properties
5610 * of the debug registers such as number of breakpoints;
5611 * check that if they both exist then they agree.
5613 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
)) {
5614 assert(extract32(cpu
->id_aa64dfr0
, 12, 4) == brps
);
5615 assert(extract32(cpu
->id_aa64dfr0
, 20, 4) == wrps
);
5616 assert(extract32(cpu
->id_aa64dfr0
, 28, 4) == ctx_cmps
);
5619 define_one_arm_cp_reg(cpu
, &dbgdidr
);
5620 define_arm_cp_regs(cpu
, debug_cp_reginfo
);
5622 if (arm_feature(&cpu
->env
, ARM_FEATURE_LPAE
)) {
5623 define_arm_cp_regs(cpu
, debug_lpae_cp_reginfo
);
5626 for (i
= 0; i
< brps
+ 1; i
++) {
5627 ARMCPRegInfo dbgregs
[] = {
5628 { .name
= "DBGBVR", .state
= ARM_CP_STATE_BOTH
,
5629 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 4,
5630 .access
= PL1_RW
, .accessfn
= access_tda
,
5631 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbvr
[i
]),
5632 .writefn
= dbgbvr_write
, .raw_writefn
= raw_write
5634 { .name
= "DBGBCR", .state
= ARM_CP_STATE_BOTH
,
5635 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 5,
5636 .access
= PL1_RW
, .accessfn
= access_tda
,
5637 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbcr
[i
]),
5638 .writefn
= dbgbcr_write
, .raw_writefn
= raw_write
5642 define_arm_cp_regs(cpu
, dbgregs
);
5645 for (i
= 0; i
< wrps
+ 1; i
++) {
5646 ARMCPRegInfo dbgregs
[] = {
5647 { .name
= "DBGWVR", .state
= ARM_CP_STATE_BOTH
,
5648 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 6,
5649 .access
= PL1_RW
, .accessfn
= access_tda
,
5650 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwvr
[i
]),
5651 .writefn
= dbgwvr_write
, .raw_writefn
= raw_write
5653 { .name
= "DBGWCR", .state
= ARM_CP_STATE_BOTH
,
5654 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 7,
5655 .access
= PL1_RW
, .accessfn
= access_tda
,
5656 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwcr
[i
]),
5657 .writefn
= dbgwcr_write
, .raw_writefn
= raw_write
5661 define_arm_cp_regs(cpu
, dbgregs
);
5665 /* We don't know until after realize whether there's a GICv3
5666 * attached, and that is what registers the gicv3 sysregs.
5667 * So we have to fill in the GIC fields in ID_PFR/ID_PFR1_EL1/ID_AA64PFR0_EL1
5670 static uint64_t id_pfr1_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
5672 ARMCPU
*cpu
= env_archcpu(env
);
5673 uint64_t pfr1
= cpu
->id_pfr1
;
5675 if (env
->gicv3state
) {
5681 static uint64_t id_aa64pfr0_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
5683 ARMCPU
*cpu
= env_archcpu(env
);
5684 uint64_t pfr0
= cpu
->isar
.id_aa64pfr0
;
5686 if (env
->gicv3state
) {
5692 /* Shared logic between LORID and the rest of the LOR* registers.
5693 * Secure state has already been delt with.
5695 static CPAccessResult
access_lor_ns(CPUARMState
*env
)
5697 int el
= arm_current_el(env
);
5699 if (el
< 2 && (arm_hcr_el2_eff(env
) & HCR_TLOR
)) {
5700 return CP_ACCESS_TRAP_EL2
;
5702 if (el
< 3 && (env
->cp15
.scr_el3
& SCR_TLOR
)) {
5703 return CP_ACCESS_TRAP_EL3
;
5705 return CP_ACCESS_OK
;
5708 static CPAccessResult
access_lorid(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5711 if (arm_is_secure_below_el3(env
)) {
5712 /* Access ok in secure mode. */
5713 return CP_ACCESS_OK
;
5715 return access_lor_ns(env
);
5718 static CPAccessResult
access_lor_other(CPUARMState
*env
,
5719 const ARMCPRegInfo
*ri
, bool isread
)
5721 if (arm_is_secure_below_el3(env
)) {
5722 /* Access denied in secure mode. */
5723 return CP_ACCESS_TRAP
;
5725 return access_lor_ns(env
);
5728 #ifdef TARGET_AARCH64
5729 static CPAccessResult
access_pauth(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5732 int el
= arm_current_el(env
);
5735 arm_feature(env
, ARM_FEATURE_EL2
) &&
5736 !(arm_hcr_el2_eff(env
) & HCR_APK
)) {
5737 return CP_ACCESS_TRAP_EL2
;
5740 arm_feature(env
, ARM_FEATURE_EL3
) &&
5741 !(env
->cp15
.scr_el3
& SCR_APK
)) {
5742 return CP_ACCESS_TRAP_EL3
;
5744 return CP_ACCESS_OK
;
5747 static const ARMCPRegInfo pauth_reginfo
[] = {
5748 { .name
= "APDAKEYLO_EL1", .state
= ARM_CP_STATE_AA64
,
5749 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 2, .opc2
= 0,
5750 .access
= PL1_RW
, .accessfn
= access_pauth
,
5751 .fieldoffset
= offsetof(CPUARMState
, keys
.apda
.lo
) },
5752 { .name
= "APDAKEYHI_EL1", .state
= ARM_CP_STATE_AA64
,
5753 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 2, .opc2
= 1,
5754 .access
= PL1_RW
, .accessfn
= access_pauth
,
5755 .fieldoffset
= offsetof(CPUARMState
, keys
.apda
.hi
) },
5756 { .name
= "APDBKEYLO_EL1", .state
= ARM_CP_STATE_AA64
,
5757 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 2, .opc2
= 2,
5758 .access
= PL1_RW
, .accessfn
= access_pauth
,
5759 .fieldoffset
= offsetof(CPUARMState
, keys
.apdb
.lo
) },
5760 { .name
= "APDBKEYHI_EL1", .state
= ARM_CP_STATE_AA64
,
5761 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 2, .opc2
= 3,
5762 .access
= PL1_RW
, .accessfn
= access_pauth
,
5763 .fieldoffset
= offsetof(CPUARMState
, keys
.apdb
.hi
) },
5764 { .name
= "APGAKEYLO_EL1", .state
= ARM_CP_STATE_AA64
,
5765 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 3, .opc2
= 0,
5766 .access
= PL1_RW
, .accessfn
= access_pauth
,
5767 .fieldoffset
= offsetof(CPUARMState
, keys
.apga
.lo
) },
5768 { .name
= "APGAKEYHI_EL1", .state
= ARM_CP_STATE_AA64
,
5769 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 3, .opc2
= 1,
5770 .access
= PL1_RW
, .accessfn
= access_pauth
,
5771 .fieldoffset
= offsetof(CPUARMState
, keys
.apga
.hi
) },
5772 { .name
= "APIAKEYLO_EL1", .state
= ARM_CP_STATE_AA64
,
5773 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 1, .opc2
= 0,
5774 .access
= PL1_RW
, .accessfn
= access_pauth
,
5775 .fieldoffset
= offsetof(CPUARMState
, keys
.apia
.lo
) },
5776 { .name
= "APIAKEYHI_EL1", .state
= ARM_CP_STATE_AA64
,
5777 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 1, .opc2
= 1,
5778 .access
= PL1_RW
, .accessfn
= access_pauth
,
5779 .fieldoffset
= offsetof(CPUARMState
, keys
.apia
.hi
) },
5780 { .name
= "APIBKEYLO_EL1", .state
= ARM_CP_STATE_AA64
,
5781 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 1, .opc2
= 2,
5782 .access
= PL1_RW
, .accessfn
= access_pauth
,
5783 .fieldoffset
= offsetof(CPUARMState
, keys
.apib
.lo
) },
5784 { .name
= "APIBKEYHI_EL1", .state
= ARM_CP_STATE_AA64
,
5785 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 1, .opc2
= 3,
5786 .access
= PL1_RW
, .accessfn
= access_pauth
,
5787 .fieldoffset
= offsetof(CPUARMState
, keys
.apib
.hi
) },
5791 static uint64_t rndr_readfn(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
5796 /* Success sets NZCV = 0000. */
5797 env
->NF
= env
->CF
= env
->VF
= 0, env
->ZF
= 1;
5799 if (qemu_guest_getrandom(&ret
, sizeof(ret
), &err
) < 0) {
5801 * ??? Failed, for unknown reasons in the crypto subsystem.
5802 * The best we can do is log the reason and return the
5803 * timed-out indication to the guest. There is no reason
5804 * we know to expect this failure to be transitory, so the
5805 * guest may well hang retrying the operation.
5807 qemu_log_mask(LOG_UNIMP
, "%s: Crypto failure: %s",
5808 ri
->name
, error_get_pretty(err
));
5811 env
->ZF
= 0; /* NZCF = 0100 */
5817 /* We do not support re-seeding, so the two registers operate the same. */
5818 static const ARMCPRegInfo rndr_reginfo
[] = {
5819 { .name
= "RNDR", .state
= ARM_CP_STATE_AA64
,
5820 .type
= ARM_CP_NO_RAW
| ARM_CP_SUPPRESS_TB_END
| ARM_CP_IO
,
5821 .opc0
= 3, .opc1
= 3, .crn
= 2, .crm
= 4, .opc2
= 0,
5822 .access
= PL0_R
, .readfn
= rndr_readfn
},
5823 { .name
= "RNDRRS", .state
= ARM_CP_STATE_AA64
,
5824 .type
= ARM_CP_NO_RAW
| ARM_CP_SUPPRESS_TB_END
| ARM_CP_IO
,
5825 .opc0
= 3, .opc1
= 3, .crn
= 2, .crm
= 4, .opc2
= 1,
5826 .access
= PL0_R
, .readfn
= rndr_readfn
},
5831 static CPAccessResult
access_predinv(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5834 int el
= arm_current_el(env
);
5837 uint64_t sctlr
= arm_sctlr(env
, el
);
5838 if (!(sctlr
& SCTLR_EnRCTX
)) {
5839 return CP_ACCESS_TRAP
;
5841 } else if (el
== 1) {
5842 uint64_t hcr
= arm_hcr_el2_eff(env
);
5844 return CP_ACCESS_TRAP_EL2
;
5847 return CP_ACCESS_OK
;
5850 static const ARMCPRegInfo predinv_reginfo
[] = {
5851 { .name
= "CFP_RCTX", .state
= ARM_CP_STATE_AA64
,
5852 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 3, .opc2
= 4,
5853 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5854 { .name
= "DVP_RCTX", .state
= ARM_CP_STATE_AA64
,
5855 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 3, .opc2
= 5,
5856 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5857 { .name
= "CPP_RCTX", .state
= ARM_CP_STATE_AA64
,
5858 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 3, .opc2
= 7,
5859 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5861 * Note the AArch32 opcodes have a different OPC1.
5863 { .name
= "CFPRCTX", .state
= ARM_CP_STATE_AA32
,
5864 .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 3, .opc2
= 4,
5865 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5866 { .name
= "DVPRCTX", .state
= ARM_CP_STATE_AA32
,
5867 .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 3, .opc2
= 5,
5868 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5869 { .name
= "CPPRCTX", .state
= ARM_CP_STATE_AA32
,
5870 .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 3, .opc2
= 7,
5871 .type
= ARM_CP_NOP
, .access
= PL0_W
, .accessfn
= access_predinv
},
5875 void register_cp_regs_for_features(ARMCPU
*cpu
)
5877 /* Register all the coprocessor registers based on feature bits */
5878 CPUARMState
*env
= &cpu
->env
;
5879 if (arm_feature(env
, ARM_FEATURE_M
)) {
5880 /* M profile has no coprocessor registers */
5884 define_arm_cp_regs(cpu
, cp_reginfo
);
5885 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
5886 /* Must go early as it is full of wildcards that may be
5887 * overridden by later definitions.
5889 define_arm_cp_regs(cpu
, not_v8_cp_reginfo
);
5892 if (arm_feature(env
, ARM_FEATURE_V6
)) {
5893 /* The ID registers all have impdef reset values */
5894 ARMCPRegInfo v6_idregs
[] = {
5895 { .name
= "ID_PFR0", .state
= ARM_CP_STATE_BOTH
,
5896 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
5897 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5898 .resetvalue
= cpu
->id_pfr0
},
5899 /* ID_PFR1 is not a plain ARM_CP_CONST because we don't know
5900 * the value of the GIC field until after we define these regs.
5902 { .name
= "ID_PFR1", .state
= ARM_CP_STATE_BOTH
,
5903 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 1,
5904 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
5905 .readfn
= id_pfr1_read
,
5906 .writefn
= arm_cp_write_ignore
},
5907 { .name
= "ID_DFR0", .state
= ARM_CP_STATE_BOTH
,
5908 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 2,
5909 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5910 .resetvalue
= cpu
->id_dfr0
},
5911 { .name
= "ID_AFR0", .state
= ARM_CP_STATE_BOTH
,
5912 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 3,
5913 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5914 .resetvalue
= cpu
->id_afr0
},
5915 { .name
= "ID_MMFR0", .state
= ARM_CP_STATE_BOTH
,
5916 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 4,
5917 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5918 .resetvalue
= cpu
->id_mmfr0
},
5919 { .name
= "ID_MMFR1", .state
= ARM_CP_STATE_BOTH
,
5920 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 5,
5921 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5922 .resetvalue
= cpu
->id_mmfr1
},
5923 { .name
= "ID_MMFR2", .state
= ARM_CP_STATE_BOTH
,
5924 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 6,
5925 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5926 .resetvalue
= cpu
->id_mmfr2
},
5927 { .name
= "ID_MMFR3", .state
= ARM_CP_STATE_BOTH
,
5928 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 7,
5929 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5930 .resetvalue
= cpu
->id_mmfr3
},
5931 { .name
= "ID_ISAR0", .state
= ARM_CP_STATE_BOTH
,
5932 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
5933 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5934 .resetvalue
= cpu
->isar
.id_isar0
},
5935 { .name
= "ID_ISAR1", .state
= ARM_CP_STATE_BOTH
,
5936 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 1,
5937 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5938 .resetvalue
= cpu
->isar
.id_isar1
},
5939 { .name
= "ID_ISAR2", .state
= ARM_CP_STATE_BOTH
,
5940 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
5941 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5942 .resetvalue
= cpu
->isar
.id_isar2
},
5943 { .name
= "ID_ISAR3", .state
= ARM_CP_STATE_BOTH
,
5944 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 3,
5945 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5946 .resetvalue
= cpu
->isar
.id_isar3
},
5947 { .name
= "ID_ISAR4", .state
= ARM_CP_STATE_BOTH
,
5948 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 4,
5949 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5950 .resetvalue
= cpu
->isar
.id_isar4
},
5951 { .name
= "ID_ISAR5", .state
= ARM_CP_STATE_BOTH
,
5952 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 5,
5953 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5954 .resetvalue
= cpu
->isar
.id_isar5
},
5955 { .name
= "ID_MMFR4", .state
= ARM_CP_STATE_BOTH
,
5956 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 6,
5957 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5958 .resetvalue
= cpu
->id_mmfr4
},
5959 { .name
= "ID_ISAR6", .state
= ARM_CP_STATE_BOTH
,
5960 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 7,
5961 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5962 .resetvalue
= cpu
->isar
.id_isar6
},
5965 define_arm_cp_regs(cpu
, v6_idregs
);
5966 define_arm_cp_regs(cpu
, v6_cp_reginfo
);
5968 define_arm_cp_regs(cpu
, not_v6_cp_reginfo
);
5970 if (arm_feature(env
, ARM_FEATURE_V6K
)) {
5971 define_arm_cp_regs(cpu
, v6k_cp_reginfo
);
5973 if (arm_feature(env
, ARM_FEATURE_V7MP
) &&
5974 !arm_feature(env
, ARM_FEATURE_PMSA
)) {
5975 define_arm_cp_regs(cpu
, v7mp_cp_reginfo
);
5977 if (arm_feature(env
, ARM_FEATURE_V7VE
)) {
5978 define_arm_cp_regs(cpu
, pmovsset_cp_reginfo
);
5980 if (arm_feature(env
, ARM_FEATURE_V7
)) {
5981 /* v7 performance monitor control register: same implementor
5982 * field as main ID register, and we implement four counters in
5983 * addition to the cycle count register.
5985 unsigned int i
, pmcrn
= 4;
5986 ARMCPRegInfo pmcr
= {
5987 .name
= "PMCR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 0,
5989 .type
= ARM_CP_IO
| ARM_CP_ALIAS
,
5990 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcr
),
5991 .accessfn
= pmreg_access
, .writefn
= pmcr_write
,
5992 .raw_writefn
= raw_write
,
5994 ARMCPRegInfo pmcr64
= {
5995 .name
= "PMCR_EL0", .state
= ARM_CP_STATE_AA64
,
5996 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 0,
5997 .access
= PL0_RW
, .accessfn
= pmreg_access
,
5999 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcr
),
6000 .resetvalue
= (cpu
->midr
& 0xff000000) | (pmcrn
<< PMCRN_SHIFT
),
6001 .writefn
= pmcr_write
, .raw_writefn
= raw_write
,
6003 define_one_arm_cp_reg(cpu
, &pmcr
);
6004 define_one_arm_cp_reg(cpu
, &pmcr64
);
6005 for (i
= 0; i
< pmcrn
; i
++) {
6006 char *pmevcntr_name
= g_strdup_printf("PMEVCNTR%d", i
);
6007 char *pmevcntr_el0_name
= g_strdup_printf("PMEVCNTR%d_EL0", i
);
6008 char *pmevtyper_name
= g_strdup_printf("PMEVTYPER%d", i
);
6009 char *pmevtyper_el0_name
= g_strdup_printf("PMEVTYPER%d_EL0", i
);
6010 ARMCPRegInfo pmev_regs
[] = {
6011 { .name
= pmevcntr_name
, .cp
= 15, .crn
= 14,
6012 .crm
= 8 | (3 & (i
>> 3)), .opc1
= 0, .opc2
= i
& 7,
6013 .access
= PL0_RW
, .type
= ARM_CP_IO
| ARM_CP_ALIAS
,
6014 .readfn
= pmevcntr_readfn
, .writefn
= pmevcntr_writefn
,
6015 .accessfn
= pmreg_access
},
6016 { .name
= pmevcntr_el0_name
, .state
= ARM_CP_STATE_AA64
,
6017 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 8 | (3 & (i
>> 3)),
6018 .opc2
= i
& 7, .access
= PL0_RW
, .accessfn
= pmreg_access
,
6020 .readfn
= pmevcntr_readfn
, .writefn
= pmevcntr_writefn
,
6021 .raw_readfn
= pmevcntr_rawread
,
6022 .raw_writefn
= pmevcntr_rawwrite
},
6023 { .name
= pmevtyper_name
, .cp
= 15, .crn
= 14,
6024 .crm
= 12 | (3 & (i
>> 3)), .opc1
= 0, .opc2
= i
& 7,
6025 .access
= PL0_RW
, .type
= ARM_CP_IO
| ARM_CP_ALIAS
,
6026 .readfn
= pmevtyper_readfn
, .writefn
= pmevtyper_writefn
,
6027 .accessfn
= pmreg_access
},
6028 { .name
= pmevtyper_el0_name
, .state
= ARM_CP_STATE_AA64
,
6029 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 12 | (3 & (i
>> 3)),
6030 .opc2
= i
& 7, .access
= PL0_RW
, .accessfn
= pmreg_access
,
6032 .readfn
= pmevtyper_readfn
, .writefn
= pmevtyper_writefn
,
6033 .raw_writefn
= pmevtyper_rawwrite
},
6036 define_arm_cp_regs(cpu
, pmev_regs
);
6037 g_free(pmevcntr_name
);
6038 g_free(pmevcntr_el0_name
);
6039 g_free(pmevtyper_name
);
6040 g_free(pmevtyper_el0_name
);
6042 ARMCPRegInfo clidr
= {
6043 .name
= "CLIDR", .state
= ARM_CP_STATE_BOTH
,
6044 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 1,
6045 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->clidr
6047 define_one_arm_cp_reg(cpu
, &clidr
);
6048 define_arm_cp_regs(cpu
, v7_cp_reginfo
);
6049 define_debug_regs(cpu
);
6051 define_arm_cp_regs(cpu
, not_v7_cp_reginfo
);
6053 if (FIELD_EX32(cpu
->id_dfr0
, ID_DFR0
, PERFMON
) >= 4 &&
6054 FIELD_EX32(cpu
->id_dfr0
, ID_DFR0
, PERFMON
) != 0xf) {
6055 ARMCPRegInfo v81_pmu_regs
[] = {
6056 { .name
= "PMCEID2", .state
= ARM_CP_STATE_AA32
,
6057 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 4,
6058 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6059 .resetvalue
= extract64(cpu
->pmceid0
, 32, 32) },
6060 { .name
= "PMCEID3", .state
= ARM_CP_STATE_AA32
,
6061 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 5,
6062 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6063 .resetvalue
= extract64(cpu
->pmceid1
, 32, 32) },
6066 define_arm_cp_regs(cpu
, v81_pmu_regs
);
6068 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6069 /* AArch64 ID registers, which all have impdef reset values.
6070 * Note that within the ID register ranges the unused slots
6071 * must all RAZ, not UNDEF; future architecture versions may
6072 * define new registers here.
6074 ARMCPRegInfo v8_idregs
[] = {
6075 /* ID_AA64PFR0_EL1 is not a plain ARM_CP_CONST because we don't
6076 * know the right value for the GIC field until after we
6077 * define these regs.
6079 { .name
= "ID_AA64PFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6080 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 0,
6081 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
6082 .readfn
= id_aa64pfr0_read
,
6083 .writefn
= arm_cp_write_ignore
},
6084 { .name
= "ID_AA64PFR1_EL1", .state
= ARM_CP_STATE_AA64
,
6085 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 1,
6086 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6087 .resetvalue
= cpu
->isar
.id_aa64pfr1
},
6088 { .name
= "ID_AA64PFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6089 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 2,
6090 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6092 { .name
= "ID_AA64PFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6093 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 3,
6094 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6096 { .name
= "ID_AA64ZFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6097 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 4,
6098 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6099 /* At present, only SVEver == 0 is defined anyway. */
6101 { .name
= "ID_AA64PFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6102 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 5,
6103 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6105 { .name
= "ID_AA64PFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6106 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 6,
6107 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6109 { .name
= "ID_AA64PFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6110 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 7,
6111 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6113 { .name
= "ID_AA64DFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6114 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 0,
6115 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6116 .resetvalue
= cpu
->id_aa64dfr0
},
6117 { .name
= "ID_AA64DFR1_EL1", .state
= ARM_CP_STATE_AA64
,
6118 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 1,
6119 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6120 .resetvalue
= cpu
->id_aa64dfr1
},
6121 { .name
= "ID_AA64DFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6122 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 2,
6123 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6125 { .name
= "ID_AA64DFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6126 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 3,
6127 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6129 { .name
= "ID_AA64AFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6130 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 4,
6131 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6132 .resetvalue
= cpu
->id_aa64afr0
},
6133 { .name
= "ID_AA64AFR1_EL1", .state
= ARM_CP_STATE_AA64
,
6134 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 5,
6135 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6136 .resetvalue
= cpu
->id_aa64afr1
},
6137 { .name
= "ID_AA64AFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6138 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 6,
6139 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6141 { .name
= "ID_AA64AFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6142 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 7,
6143 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6145 { .name
= "ID_AA64ISAR0_EL1", .state
= ARM_CP_STATE_AA64
,
6146 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 0,
6147 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6148 .resetvalue
= cpu
->isar
.id_aa64isar0
},
6149 { .name
= "ID_AA64ISAR1_EL1", .state
= ARM_CP_STATE_AA64
,
6150 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 1,
6151 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6152 .resetvalue
= cpu
->isar
.id_aa64isar1
},
6153 { .name
= "ID_AA64ISAR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6154 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 2,
6155 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6157 { .name
= "ID_AA64ISAR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6158 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 3,
6159 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6161 { .name
= "ID_AA64ISAR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6162 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 4,
6163 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6165 { .name
= "ID_AA64ISAR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6166 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 5,
6167 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6169 { .name
= "ID_AA64ISAR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6170 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 6,
6171 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6173 { .name
= "ID_AA64ISAR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6174 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 7,
6175 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6177 { .name
= "ID_AA64MMFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6178 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
6179 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6180 .resetvalue
= cpu
->isar
.id_aa64mmfr0
},
6181 { .name
= "ID_AA64MMFR1_EL1", .state
= ARM_CP_STATE_AA64
,
6182 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 1,
6183 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6184 .resetvalue
= cpu
->isar
.id_aa64mmfr1
},
6185 { .name
= "ID_AA64MMFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6186 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 2,
6187 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6189 { .name
= "ID_AA64MMFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6190 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 3,
6191 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6193 { .name
= "ID_AA64MMFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6194 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 4,
6195 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6197 { .name
= "ID_AA64MMFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6198 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 5,
6199 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6201 { .name
= "ID_AA64MMFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6202 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 6,
6203 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6205 { .name
= "ID_AA64MMFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6206 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 7,
6207 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6209 { .name
= "MVFR0_EL1", .state
= ARM_CP_STATE_AA64
,
6210 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 0,
6211 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6212 .resetvalue
= cpu
->isar
.mvfr0
},
6213 { .name
= "MVFR1_EL1", .state
= ARM_CP_STATE_AA64
,
6214 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 1,
6215 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6216 .resetvalue
= cpu
->isar
.mvfr1
},
6217 { .name
= "MVFR2_EL1", .state
= ARM_CP_STATE_AA64
,
6218 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 2,
6219 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6220 .resetvalue
= cpu
->isar
.mvfr2
},
6221 { .name
= "MVFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6222 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 3,
6223 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6225 { .name
= "MVFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6226 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 4,
6227 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6229 { .name
= "MVFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6230 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 5,
6231 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6233 { .name
= "MVFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6234 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 6,
6235 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6237 { .name
= "MVFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
6238 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 7,
6239 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6241 { .name
= "PMCEID0", .state
= ARM_CP_STATE_AA32
,
6242 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 6,
6243 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6244 .resetvalue
= extract64(cpu
->pmceid0
, 0, 32) },
6245 { .name
= "PMCEID0_EL0", .state
= ARM_CP_STATE_AA64
,
6246 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 6,
6247 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6248 .resetvalue
= cpu
->pmceid0
},
6249 { .name
= "PMCEID1", .state
= ARM_CP_STATE_AA32
,
6250 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 7,
6251 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6252 .resetvalue
= extract64(cpu
->pmceid1
, 0, 32) },
6253 { .name
= "PMCEID1_EL0", .state
= ARM_CP_STATE_AA64
,
6254 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 7,
6255 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
6256 .resetvalue
= cpu
->pmceid1
},
6259 #ifdef CONFIG_USER_ONLY
6260 ARMCPRegUserSpaceInfo v8_user_idregs
[] = {
6261 { .name
= "ID_AA64PFR0_EL1",
6262 .exported_bits
= 0x000f000f00ff0000,
6263 .fixed_bits
= 0x0000000000000011 },
6264 { .name
= "ID_AA64PFR1_EL1",
6265 .exported_bits
= 0x00000000000000f0 },
6266 { .name
= "ID_AA64PFR*_EL1_RESERVED",
6268 { .name
= "ID_AA64ZFR0_EL1" },
6269 { .name
= "ID_AA64MMFR0_EL1",
6270 .fixed_bits
= 0x00000000ff000000 },
6271 { .name
= "ID_AA64MMFR1_EL1" },
6272 { .name
= "ID_AA64MMFR*_EL1_RESERVED",
6274 { .name
= "ID_AA64DFR0_EL1",
6275 .fixed_bits
= 0x0000000000000006 },
6276 { .name
= "ID_AA64DFR1_EL1" },
6277 { .name
= "ID_AA64DFR*_EL1_RESERVED",
6279 { .name
= "ID_AA64AFR*",
6281 { .name
= "ID_AA64ISAR0_EL1",
6282 .exported_bits
= 0x00fffffff0fffff0 },
6283 { .name
= "ID_AA64ISAR1_EL1",
6284 .exported_bits
= 0x000000f0ffffffff },
6285 { .name
= "ID_AA64ISAR*_EL1_RESERVED",
6287 REGUSERINFO_SENTINEL
6289 modify_arm_cp_regs(v8_idregs
, v8_user_idregs
);
6291 /* RVBAR_EL1 is only implemented if EL1 is the highest EL */
6292 if (!arm_feature(env
, ARM_FEATURE_EL3
) &&
6293 !arm_feature(env
, ARM_FEATURE_EL2
)) {
6294 ARMCPRegInfo rvbar
= {
6295 .name
= "RVBAR_EL1", .state
= ARM_CP_STATE_AA64
,
6296 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
6297 .type
= ARM_CP_CONST
, .access
= PL1_R
, .resetvalue
= cpu
->rvbar
6299 define_one_arm_cp_reg(cpu
, &rvbar
);
6301 define_arm_cp_regs(cpu
, v8_idregs
);
6302 define_arm_cp_regs(cpu
, v8_cp_reginfo
);
6304 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
6305 uint64_t vmpidr_def
= mpidr_read_val(env
);
6306 ARMCPRegInfo vpidr_regs
[] = {
6307 { .name
= "VPIDR", .state
= ARM_CP_STATE_AA32
,
6308 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
6309 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
6310 .resetvalue
= cpu
->midr
, .type
= ARM_CP_ALIAS
,
6311 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.vpidr_el2
) },
6312 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
6313 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
6314 .access
= PL2_RW
, .resetvalue
= cpu
->midr
,
6315 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
6316 { .name
= "VMPIDR", .state
= ARM_CP_STATE_AA32
,
6317 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
6318 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
6319 .resetvalue
= vmpidr_def
, .type
= ARM_CP_ALIAS
,
6320 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.vmpidr_el2
) },
6321 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
6322 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
6324 .resetvalue
= vmpidr_def
,
6325 .fieldoffset
= offsetof(CPUARMState
, cp15
.vmpidr_el2
) },
6328 define_arm_cp_regs(cpu
, vpidr_regs
);
6329 define_arm_cp_regs(cpu
, el2_cp_reginfo
);
6330 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6331 define_arm_cp_regs(cpu
, el2_v8_cp_reginfo
);
6333 /* RVBAR_EL2 is only implemented if EL2 is the highest EL */
6334 if (!arm_feature(env
, ARM_FEATURE_EL3
)) {
6335 ARMCPRegInfo rvbar
= {
6336 .name
= "RVBAR_EL2", .state
= ARM_CP_STATE_AA64
,
6337 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 1,
6338 .type
= ARM_CP_CONST
, .access
= PL2_R
, .resetvalue
= cpu
->rvbar
6340 define_one_arm_cp_reg(cpu
, &rvbar
);
6343 /* If EL2 is missing but higher ELs are enabled, we need to
6344 * register the no_el2 reginfos.
6346 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6347 /* When EL3 exists but not EL2, VPIDR and VMPIDR take the value
6348 * of MIDR_EL1 and MPIDR_EL1.
6350 ARMCPRegInfo vpidr_regs
[] = {
6351 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
6352 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
6353 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
6354 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->midr
,
6355 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
6356 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
6357 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
6358 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
6359 .type
= ARM_CP_NO_RAW
,
6360 .writefn
= arm_cp_write_ignore
, .readfn
= mpidr_read
},
6363 define_arm_cp_regs(cpu
, vpidr_regs
);
6364 define_arm_cp_regs(cpu
, el3_no_el2_cp_reginfo
);
6365 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6366 define_arm_cp_regs(cpu
, el3_no_el2_v8_cp_reginfo
);
6370 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6371 define_arm_cp_regs(cpu
, el3_cp_reginfo
);
6372 ARMCPRegInfo el3_regs
[] = {
6373 { .name
= "RVBAR_EL3", .state
= ARM_CP_STATE_AA64
,
6374 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 1,
6375 .type
= ARM_CP_CONST
, .access
= PL3_R
, .resetvalue
= cpu
->rvbar
},
6376 { .name
= "SCTLR_EL3", .state
= ARM_CP_STATE_AA64
,
6377 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 0,
6379 .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
6380 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[3]),
6381 .resetvalue
= cpu
->reset_sctlr
},
6385 define_arm_cp_regs(cpu
, el3_regs
);
6387 /* The behaviour of NSACR is sufficiently various that we don't
6388 * try to describe it in a single reginfo:
6389 * if EL3 is 64 bit, then trap to EL3 from S EL1,
6390 * reads as constant 0xc00 from NS EL1 and NS EL2
6391 * if EL3 is 32 bit, then RW at EL3, RO at NS EL1 and NS EL2
6392 * if v7 without EL3, register doesn't exist
6393 * if v8 without EL3, reads as constant 0xc00 from NS EL1 and NS EL2
6395 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6396 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
6397 ARMCPRegInfo nsacr
= {
6398 .name
= "NSACR", .type
= ARM_CP_CONST
,
6399 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
6400 .access
= PL1_RW
, .accessfn
= nsacr_access
,
6403 define_one_arm_cp_reg(cpu
, &nsacr
);
6405 ARMCPRegInfo nsacr
= {
6407 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
6408 .access
= PL3_RW
| PL1_R
,
6410 .fieldoffset
= offsetof(CPUARMState
, cp15
.nsacr
)
6412 define_one_arm_cp_reg(cpu
, &nsacr
);
6415 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6416 ARMCPRegInfo nsacr
= {
6417 .name
= "NSACR", .type
= ARM_CP_CONST
,
6418 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
6422 define_one_arm_cp_reg(cpu
, &nsacr
);
6426 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
6427 if (arm_feature(env
, ARM_FEATURE_V6
)) {
6428 /* PMSAv6 not implemented */
6429 assert(arm_feature(env
, ARM_FEATURE_V7
));
6430 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
6431 define_arm_cp_regs(cpu
, pmsav7_cp_reginfo
);
6433 define_arm_cp_regs(cpu
, pmsav5_cp_reginfo
);
6436 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
6437 define_arm_cp_regs(cpu
, vmsa_cp_reginfo
);
6438 /* TTCBR2 is introduced with ARMv8.2-A32HPD. */
6439 if (FIELD_EX32(cpu
->id_mmfr4
, ID_MMFR4
, HPDS
) != 0) {
6440 define_one_arm_cp_reg(cpu
, &ttbcr2_reginfo
);
6443 if (arm_feature(env
, ARM_FEATURE_THUMB2EE
)) {
6444 define_arm_cp_regs(cpu
, t2ee_cp_reginfo
);
6446 if (arm_feature(env
, ARM_FEATURE_GENERIC_TIMER
)) {
6447 define_arm_cp_regs(cpu
, generic_timer_cp_reginfo
);
6449 if (arm_feature(env
, ARM_FEATURE_VAPA
)) {
6450 define_arm_cp_regs(cpu
, vapa_cp_reginfo
);
6452 if (arm_feature(env
, ARM_FEATURE_CACHE_TEST_CLEAN
)) {
6453 define_arm_cp_regs(cpu
, cache_test_clean_cp_reginfo
);
6455 if (arm_feature(env
, ARM_FEATURE_CACHE_DIRTY_REG
)) {
6456 define_arm_cp_regs(cpu
, cache_dirty_status_cp_reginfo
);
6458 if (arm_feature(env
, ARM_FEATURE_CACHE_BLOCK_OPS
)) {
6459 define_arm_cp_regs(cpu
, cache_block_ops_cp_reginfo
);
6461 if (arm_feature(env
, ARM_FEATURE_OMAPCP
)) {
6462 define_arm_cp_regs(cpu
, omap_cp_reginfo
);
6464 if (arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
6465 define_arm_cp_regs(cpu
, strongarm_cp_reginfo
);
6467 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
6468 define_arm_cp_regs(cpu
, xscale_cp_reginfo
);
6470 if (arm_feature(env
, ARM_FEATURE_DUMMY_C15_REGS
)) {
6471 define_arm_cp_regs(cpu
, dummy_c15_cp_reginfo
);
6473 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
6474 define_arm_cp_regs(cpu
, lpae_cp_reginfo
);
6476 /* Slightly awkwardly, the OMAP and StrongARM cores need all of
6477 * cp15 crn=0 to be writes-ignored, whereas for other cores they should
6478 * be read-only (ie write causes UNDEF exception).
6481 ARMCPRegInfo id_pre_v8_midr_cp_reginfo
[] = {
6482 /* Pre-v8 MIDR space.
6483 * Note that the MIDR isn't a simple constant register because
6484 * of the TI925 behaviour where writes to another register can
6485 * cause the MIDR value to change.
6487 * Unimplemented registers in the c15 0 0 0 space default to
6488 * MIDR. Define MIDR first as this entire space, then CTR, TCMTR
6489 * and friends override accordingly.
6492 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= CP_ANY
,
6493 .access
= PL1_R
, .resetvalue
= cpu
->midr
,
6494 .writefn
= arm_cp_write_ignore
, .raw_writefn
= raw_write
,
6495 .readfn
= midr_read
,
6496 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
6497 .type
= ARM_CP_OVERRIDE
},
6498 /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
6500 .cp
= 15, .crn
= 0, .crm
= 3, .opc1
= 0, .opc2
= CP_ANY
,
6501 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6503 .cp
= 15, .crn
= 0, .crm
= 4, .opc1
= 0, .opc2
= CP_ANY
,
6504 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6506 .cp
= 15, .crn
= 0, .crm
= 5, .opc1
= 0, .opc2
= CP_ANY
,
6507 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6509 .cp
= 15, .crn
= 0, .crm
= 6, .opc1
= 0, .opc2
= CP_ANY
,
6510 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6512 .cp
= 15, .crn
= 0, .crm
= 7, .opc1
= 0, .opc2
= CP_ANY
,
6513 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6516 ARMCPRegInfo id_v8_midr_cp_reginfo
[] = {
6517 { .name
= "MIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
6518 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 0,
6519 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
, .resetvalue
= cpu
->midr
,
6520 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
6521 .readfn
= midr_read
},
6522 /* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
6523 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
6524 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
6525 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
6526 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
6527 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 7,
6528 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
6529 { .name
= "REVIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
6530 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 6,
6531 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->revidr
},
6534 ARMCPRegInfo id_cp_reginfo
[] = {
6535 /* These are common to v8 and pre-v8 */
6537 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 1,
6538 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
6539 { .name
= "CTR_EL0", .state
= ARM_CP_STATE_AA64
,
6540 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 0, .crm
= 0,
6541 .access
= PL0_R
, .accessfn
= ctr_el0_access
,
6542 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
6543 /* TCMTR and TLBTR exist in v8 but have no 64-bit versions */
6545 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 2,
6546 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6549 /* TLBTR is specific to VMSA */
6550 ARMCPRegInfo id_tlbtr_reginfo
= {
6552 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 3,
6553 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0,
6555 /* MPUIR is specific to PMSA V6+ */
6556 ARMCPRegInfo id_mpuir_reginfo
= {
6558 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
6559 .access
= PL1_R
, .type
= ARM_CP_CONST
,
6560 .resetvalue
= cpu
->pmsav7_dregion
<< 8
6562 ARMCPRegInfo crn0_wi_reginfo
= {
6563 .name
= "CRN0_WI", .cp
= 15, .crn
= 0, .crm
= CP_ANY
,
6564 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_W
,
6565 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
6567 #ifdef CONFIG_USER_ONLY
6568 ARMCPRegUserSpaceInfo id_v8_user_midr_cp_reginfo
[] = {
6569 { .name
= "MIDR_EL1",
6570 .exported_bits
= 0x00000000ffffffff },
6571 { .name
= "REVIDR_EL1" },
6572 REGUSERINFO_SENTINEL
6574 modify_arm_cp_regs(id_v8_midr_cp_reginfo
, id_v8_user_midr_cp_reginfo
);
6576 if (arm_feature(env
, ARM_FEATURE_OMAPCP
) ||
6577 arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
6579 /* Register the blanket "writes ignored" value first to cover the
6580 * whole space. Then update the specific ID registers to allow write
6581 * access, so that they ignore writes rather than causing them to
6584 define_one_arm_cp_reg(cpu
, &crn0_wi_reginfo
);
6585 for (r
= id_pre_v8_midr_cp_reginfo
;
6586 r
->type
!= ARM_CP_SENTINEL
; r
++) {
6589 for (r
= id_cp_reginfo
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
6592 id_mpuir_reginfo
.access
= PL1_RW
;
6593 id_tlbtr_reginfo
.access
= PL1_RW
;
6595 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6596 define_arm_cp_regs(cpu
, id_v8_midr_cp_reginfo
);
6598 define_arm_cp_regs(cpu
, id_pre_v8_midr_cp_reginfo
);
6600 define_arm_cp_regs(cpu
, id_cp_reginfo
);
6601 if (!arm_feature(env
, ARM_FEATURE_PMSA
)) {
6602 define_one_arm_cp_reg(cpu
, &id_tlbtr_reginfo
);
6603 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
6604 define_one_arm_cp_reg(cpu
, &id_mpuir_reginfo
);
6608 if (arm_feature(env
, ARM_FEATURE_MPIDR
)) {
6609 ARMCPRegInfo mpidr_cp_reginfo
[] = {
6610 { .name
= "MPIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
6611 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 5,
6612 .access
= PL1_R
, .readfn
= mpidr_read
, .type
= ARM_CP_NO_RAW
},
6615 #ifdef CONFIG_USER_ONLY
6616 ARMCPRegUserSpaceInfo mpidr_user_cp_reginfo
[] = {
6617 { .name
= "MPIDR_EL1",
6618 .fixed_bits
= 0x0000000080000000 },
6619 REGUSERINFO_SENTINEL
6621 modify_arm_cp_regs(mpidr_cp_reginfo
, mpidr_user_cp_reginfo
);
6623 define_arm_cp_regs(cpu
, mpidr_cp_reginfo
);
6626 if (arm_feature(env
, ARM_FEATURE_AUXCR
)) {
6627 ARMCPRegInfo auxcr_reginfo
[] = {
6628 { .name
= "ACTLR_EL1", .state
= ARM_CP_STATE_BOTH
,
6629 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 1,
6630 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
6631 .resetvalue
= cpu
->reset_auxcr
},
6632 { .name
= "ACTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
6633 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 1,
6634 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
6636 { .name
= "ACTLR_EL3", .state
= ARM_CP_STATE_AA64
,
6637 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 1,
6638 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
6642 define_arm_cp_regs(cpu
, auxcr_reginfo
);
6643 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6644 /* HACTLR2 maps to ACTLR_EL2[63:32] and is not in ARMv7 */
6645 ARMCPRegInfo hactlr2_reginfo
= {
6646 .name
= "HACTLR2", .state
= ARM_CP_STATE_AA32
,
6647 .cp
= 15, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 3,
6648 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
6651 define_one_arm_cp_reg(cpu
, &hactlr2_reginfo
);
6655 if (arm_feature(env
, ARM_FEATURE_CBAR
)) {
6656 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
6657 /* 32 bit view is [31:18] 0...0 [43:32]. */
6658 uint32_t cbar32
= (extract64(cpu
->reset_cbar
, 18, 14) << 18)
6659 | extract64(cpu
->reset_cbar
, 32, 12);
6660 ARMCPRegInfo cbar_reginfo
[] = {
6662 .type
= ARM_CP_CONST
,
6663 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
6664 .access
= PL1_R
, .resetvalue
= cpu
->reset_cbar
},
6665 { .name
= "CBAR_EL1", .state
= ARM_CP_STATE_AA64
,
6666 .type
= ARM_CP_CONST
,
6667 .opc0
= 3, .opc1
= 1, .crn
= 15, .crm
= 3, .opc2
= 0,
6668 .access
= PL1_R
, .resetvalue
= cbar32
},
6671 /* We don't implement a r/w 64 bit CBAR currently */
6672 assert(arm_feature(env
, ARM_FEATURE_CBAR_RO
));
6673 define_arm_cp_regs(cpu
, cbar_reginfo
);
6675 ARMCPRegInfo cbar
= {
6677 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
6678 .access
= PL1_R
|PL3_W
, .resetvalue
= cpu
->reset_cbar
,
6679 .fieldoffset
= offsetof(CPUARMState
,
6680 cp15
.c15_config_base_address
)
6682 if (arm_feature(env
, ARM_FEATURE_CBAR_RO
)) {
6683 cbar
.access
= PL1_R
;
6684 cbar
.fieldoffset
= 0;
6685 cbar
.type
= ARM_CP_CONST
;
6687 define_one_arm_cp_reg(cpu
, &cbar
);
6691 if (arm_feature(env
, ARM_FEATURE_VBAR
)) {
6692 ARMCPRegInfo vbar_cp_reginfo
[] = {
6693 { .name
= "VBAR", .state
= ARM_CP_STATE_BOTH
,
6694 .opc0
= 3, .crn
= 12, .crm
= 0, .opc1
= 0, .opc2
= 0,
6695 .access
= PL1_RW
, .writefn
= vbar_write
,
6696 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.vbar_s
),
6697 offsetof(CPUARMState
, cp15
.vbar_ns
) },
6701 define_arm_cp_regs(cpu
, vbar_cp_reginfo
);
6704 /* Generic registers whose values depend on the implementation */
6706 ARMCPRegInfo sctlr
= {
6707 .name
= "SCTLR", .state
= ARM_CP_STATE_BOTH
,
6708 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
6710 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.sctlr_s
),
6711 offsetof(CPUARMState
, cp15
.sctlr_ns
) },
6712 .writefn
= sctlr_write
, .resetvalue
= cpu
->reset_sctlr
,
6713 .raw_writefn
= raw_write
,
6715 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
6716 /* Normally we would always end the TB on an SCTLR write, but Linux
6717 * arch/arm/mach-pxa/sleep.S expects two instructions following
6718 * an MMU enable to execute from cache. Imitate this behaviour.
6720 sctlr
.type
|= ARM_CP_SUPPRESS_TB_END
;
6722 define_one_arm_cp_reg(cpu
, &sctlr
);
6725 if (cpu_isar_feature(aa64_lor
, cpu
)) {
6727 * A trivial implementation of ARMv8.1-LOR leaves all of these
6728 * registers fixed at 0, which indicates that there are zero
6729 * supported Limited Ordering regions.
6731 static const ARMCPRegInfo lor_reginfo
[] = {
6732 { .name
= "LORSA_EL1", .state
= ARM_CP_STATE_AA64
,
6733 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 4, .opc2
= 0,
6734 .access
= PL1_RW
, .accessfn
= access_lor_other
,
6735 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6736 { .name
= "LOREA_EL1", .state
= ARM_CP_STATE_AA64
,
6737 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 4, .opc2
= 1,
6738 .access
= PL1_RW
, .accessfn
= access_lor_other
,
6739 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6740 { .name
= "LORN_EL1", .state
= ARM_CP_STATE_AA64
,
6741 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 4, .opc2
= 2,
6742 .access
= PL1_RW
, .accessfn
= access_lor_other
,
6743 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6744 { .name
= "LORC_EL1", .state
= ARM_CP_STATE_AA64
,
6745 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 4, .opc2
= 3,
6746 .access
= PL1_RW
, .accessfn
= access_lor_other
,
6747 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6748 { .name
= "LORID_EL1", .state
= ARM_CP_STATE_AA64
,
6749 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 4, .opc2
= 7,
6750 .access
= PL1_R
, .accessfn
= access_lorid
,
6751 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
6754 define_arm_cp_regs(cpu
, lor_reginfo
);
6757 if (cpu_isar_feature(aa64_sve
, cpu
)) {
6758 define_one_arm_cp_reg(cpu
, &zcr_el1_reginfo
);
6759 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
6760 define_one_arm_cp_reg(cpu
, &zcr_el2_reginfo
);
6762 define_one_arm_cp_reg(cpu
, &zcr_no_el2_reginfo
);
6764 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6765 define_one_arm_cp_reg(cpu
, &zcr_el3_reginfo
);
6769 #ifdef TARGET_AARCH64
6770 if (cpu_isar_feature(aa64_pauth
, cpu
)) {
6771 define_arm_cp_regs(cpu
, pauth_reginfo
);
6773 if (cpu_isar_feature(aa64_rndr
, cpu
)) {
6774 define_arm_cp_regs(cpu
, rndr_reginfo
);
6779 * While all v8.0 cpus support aarch64, QEMU does have configurations
6780 * that do not set ID_AA64ISAR1, e.g. user-only qemu-arm -cpu max,
6781 * which will set ID_ISAR6.
6783 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
)
6784 ? cpu_isar_feature(aa64_predinv
, cpu
)
6785 : cpu_isar_feature(aa32_predinv
, cpu
)) {
6786 define_arm_cp_regs(cpu
, predinv_reginfo
);
6790 void arm_cpu_register_gdb_regs_for_features(ARMCPU
*cpu
)
6792 CPUState
*cs
= CPU(cpu
);
6793 CPUARMState
*env
= &cpu
->env
;
6795 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
6796 gdb_register_coprocessor(cs
, aarch64_fpu_gdb_get_reg
,
6797 aarch64_fpu_gdb_set_reg
,
6798 34, "aarch64-fpu.xml", 0);
6799 } else if (arm_feature(env
, ARM_FEATURE_NEON
)) {
6800 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
6801 51, "arm-neon.xml", 0);
6802 } else if (arm_feature(env
, ARM_FEATURE_VFP3
)) {
6803 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
6804 35, "arm-vfp3.xml", 0);
6805 } else if (arm_feature(env
, ARM_FEATURE_VFP
)) {
6806 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
6807 19, "arm-vfp.xml", 0);
6809 gdb_register_coprocessor(cs
, arm_gdb_get_sysreg
, arm_gdb_set_sysreg
,
6810 arm_gen_dynamic_xml(cs
),
6811 "system-registers.xml", 0);
6814 /* Sort alphabetically by type name, except for "any". */
6815 static gint
arm_cpu_list_compare(gconstpointer a
, gconstpointer b
)
6817 ObjectClass
*class_a
= (ObjectClass
*)a
;
6818 ObjectClass
*class_b
= (ObjectClass
*)b
;
6819 const char *name_a
, *name_b
;
6821 name_a
= object_class_get_name(class_a
);
6822 name_b
= object_class_get_name(class_b
);
6823 if (strcmp(name_a
, "any-" TYPE_ARM_CPU
) == 0) {
6825 } else if (strcmp(name_b
, "any-" TYPE_ARM_CPU
) == 0) {
6828 return strcmp(name_a
, name_b
);
6832 static void arm_cpu_list_entry(gpointer data
, gpointer user_data
)
6834 ObjectClass
*oc
= data
;
6835 const char *typename
;
6838 typename
= object_class_get_name(oc
);
6839 name
= g_strndup(typename
, strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
6840 qemu_printf(" %s\n", name
);
6844 void arm_cpu_list(void)
6848 list
= object_class_get_list(TYPE_ARM_CPU
, false);
6849 list
= g_slist_sort(list
, arm_cpu_list_compare
);
6850 qemu_printf("Available CPUs:\n");
6851 g_slist_foreach(list
, arm_cpu_list_entry
, NULL
);
6855 static void arm_cpu_add_definition(gpointer data
, gpointer user_data
)
6857 ObjectClass
*oc
= data
;
6858 CpuDefinitionInfoList
**cpu_list
= user_data
;
6859 CpuDefinitionInfoList
*entry
;
6860 CpuDefinitionInfo
*info
;
6861 const char *typename
;
6863 typename
= object_class_get_name(oc
);
6864 info
= g_malloc0(sizeof(*info
));
6865 info
->name
= g_strndup(typename
,
6866 strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
6867 info
->q_typename
= g_strdup(typename
);
6869 entry
= g_malloc0(sizeof(*entry
));
6870 entry
->value
= info
;
6871 entry
->next
= *cpu_list
;
6875 CpuDefinitionInfoList
*qmp_query_cpu_definitions(Error
**errp
)
6877 CpuDefinitionInfoList
*cpu_list
= NULL
;
6880 list
= object_class_get_list(TYPE_ARM_CPU
, false);
6881 g_slist_foreach(list
, arm_cpu_add_definition
, &cpu_list
);
6887 static void add_cpreg_to_hashtable(ARMCPU
*cpu
, const ARMCPRegInfo
*r
,
6888 void *opaque
, int state
, int secstate
,
6889 int crm
, int opc1
, int opc2
,
6892 /* Private utility function for define_one_arm_cp_reg_with_opaque():
6893 * add a single reginfo struct to the hash table.
6895 uint32_t *key
= g_new(uint32_t, 1);
6896 ARMCPRegInfo
*r2
= g_memdup(r
, sizeof(ARMCPRegInfo
));
6897 int is64
= (r
->type
& ARM_CP_64BIT
) ? 1 : 0;
6898 int ns
= (secstate
& ARM_CP_SECSTATE_NS
) ? 1 : 0;
6900 r2
->name
= g_strdup(name
);
6901 /* Reset the secure state to the specific incoming state. This is
6902 * necessary as the register may have been defined with both states.
6904 r2
->secure
= secstate
;
6906 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
6907 /* Register is banked (using both entries in array).
6908 * Overwriting fieldoffset as the array is only used to define
6909 * banked registers but later only fieldoffset is used.
6911 r2
->fieldoffset
= r
->bank_fieldoffsets
[ns
];
6914 if (state
== ARM_CP_STATE_AA32
) {
6915 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
6916 /* If the register is banked then we don't need to migrate or
6917 * reset the 32-bit instance in certain cases:
6919 * 1) If the register has both 32-bit and 64-bit instances then we
6920 * can count on the 64-bit instance taking care of the
6922 * 2) If ARMv8 is enabled then we can count on a 64-bit version
6923 * taking care of the secure bank. This requires that separate
6924 * 32 and 64-bit definitions are provided.
6926 if ((r
->state
== ARM_CP_STATE_BOTH
&& ns
) ||
6927 (arm_feature(&cpu
->env
, ARM_FEATURE_V8
) && !ns
)) {
6928 r2
->type
|= ARM_CP_ALIAS
;
6930 } else if ((secstate
!= r
->secure
) && !ns
) {
6931 /* The register is not banked so we only want to allow migration of
6932 * the non-secure instance.
6934 r2
->type
|= ARM_CP_ALIAS
;
6937 if (r
->state
== ARM_CP_STATE_BOTH
) {
6938 /* We assume it is a cp15 register if the .cp field is left unset.
6944 #ifdef HOST_WORDS_BIGENDIAN
6945 if (r2
->fieldoffset
) {
6946 r2
->fieldoffset
+= sizeof(uint32_t);
6951 if (state
== ARM_CP_STATE_AA64
) {
6952 /* To allow abbreviation of ARMCPRegInfo
6953 * definitions, we treat cp == 0 as equivalent to
6954 * the value for "standard guest-visible sysreg".
6955 * STATE_BOTH definitions are also always "standard
6956 * sysreg" in their AArch64 view (the .cp value may
6957 * be non-zero for the benefit of the AArch32 view).
6959 if (r
->cp
== 0 || r
->state
== ARM_CP_STATE_BOTH
) {
6960 r2
->cp
= CP_REG_ARM64_SYSREG_CP
;
6962 *key
= ENCODE_AA64_CP_REG(r2
->cp
, r2
->crn
, crm
,
6963 r2
->opc0
, opc1
, opc2
);
6965 *key
= ENCODE_CP_REG(r2
->cp
, is64
, ns
, r2
->crn
, crm
, opc1
, opc2
);
6968 r2
->opaque
= opaque
;
6970 /* reginfo passed to helpers is correct for the actual access,
6971 * and is never ARM_CP_STATE_BOTH:
6974 /* Make sure reginfo passed to helpers for wildcarded regs
6975 * has the correct crm/opc1/opc2 for this reg, not CP_ANY:
6980 /* By convention, for wildcarded registers only the first
6981 * entry is used for migration; the others are marked as
6982 * ALIAS so we don't try to transfer the register
6983 * multiple times. Special registers (ie NOP/WFI) are
6984 * never migratable and not even raw-accessible.
6986 if ((r
->type
& ARM_CP_SPECIAL
)) {
6987 r2
->type
|= ARM_CP_NO_RAW
;
6989 if (((r
->crm
== CP_ANY
) && crm
!= 0) ||
6990 ((r
->opc1
== CP_ANY
) && opc1
!= 0) ||
6991 ((r
->opc2
== CP_ANY
) && opc2
!= 0)) {
6992 r2
->type
|= ARM_CP_ALIAS
| ARM_CP_NO_GDB
;
6995 /* Check that raw accesses are either forbidden or handled. Note that
6996 * we can't assert this earlier because the setup of fieldoffset for
6997 * banked registers has to be done first.
6999 if (!(r2
->type
& ARM_CP_NO_RAW
)) {
7000 assert(!raw_accessors_invalid(r2
));
7003 /* Overriding of an existing definition must be explicitly
7006 if (!(r
->type
& ARM_CP_OVERRIDE
)) {
7007 ARMCPRegInfo
*oldreg
;
7008 oldreg
= g_hash_table_lookup(cpu
->cp_regs
, key
);
7009 if (oldreg
&& !(oldreg
->type
& ARM_CP_OVERRIDE
)) {
7010 fprintf(stderr
, "Register redefined: cp=%d %d bit "
7011 "crn=%d crm=%d opc1=%d opc2=%d, "
7012 "was %s, now %s\n", r2
->cp
, 32 + 32 * is64
,
7013 r2
->crn
, r2
->crm
, r2
->opc1
, r2
->opc2
,
7014 oldreg
->name
, r2
->name
);
7015 g_assert_not_reached();
7018 g_hash_table_insert(cpu
->cp_regs
, key
, r2
);
7022 void define_one_arm_cp_reg_with_opaque(ARMCPU
*cpu
,
7023 const ARMCPRegInfo
*r
, void *opaque
)
7025 /* Define implementations of coprocessor registers.
7026 * We store these in a hashtable because typically
7027 * there are less than 150 registers in a space which
7028 * is 16*16*16*8*8 = 262144 in size.
7029 * Wildcarding is supported for the crm, opc1 and opc2 fields.
7030 * If a register is defined twice then the second definition is
7031 * used, so this can be used to define some generic registers and
7032 * then override them with implementation specific variations.
7033 * At least one of the original and the second definition should
7034 * include ARM_CP_OVERRIDE in its type bits -- this is just a guard
7035 * against accidental use.
7037 * The state field defines whether the register is to be
7038 * visible in the AArch32 or AArch64 execution state. If the
7039 * state is set to ARM_CP_STATE_BOTH then we synthesise a
7040 * reginfo structure for the AArch32 view, which sees the lower
7041 * 32 bits of the 64 bit register.
7043 * Only registers visible in AArch64 may set r->opc0; opc0 cannot
7044 * be wildcarded. AArch64 registers are always considered to be 64
7045 * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
7046 * the register, if any.
7048 int crm
, opc1
, opc2
, state
;
7049 int crmmin
= (r
->crm
== CP_ANY
) ? 0 : r
->crm
;
7050 int crmmax
= (r
->crm
== CP_ANY
) ? 15 : r
->crm
;
7051 int opc1min
= (r
->opc1
== CP_ANY
) ? 0 : r
->opc1
;
7052 int opc1max
= (r
->opc1
== CP_ANY
) ? 7 : r
->opc1
;
7053 int opc2min
= (r
->opc2
== CP_ANY
) ? 0 : r
->opc2
;
7054 int opc2max
= (r
->opc2
== CP_ANY
) ? 7 : r
->opc2
;
7055 /* 64 bit registers have only CRm and Opc1 fields */
7056 assert(!((r
->type
& ARM_CP_64BIT
) && (r
->opc2
|| r
->crn
)));
7057 /* op0 only exists in the AArch64 encodings */
7058 assert((r
->state
!= ARM_CP_STATE_AA32
) || (r
->opc0
== 0));
7059 /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
7060 assert((r
->state
!= ARM_CP_STATE_AA64
) || !(r
->type
& ARM_CP_64BIT
));
7061 /* The AArch64 pseudocode CheckSystemAccess() specifies that op1
7062 * encodes a minimum access level for the register. We roll this
7063 * runtime check into our general permission check code, so check
7064 * here that the reginfo's specified permissions are strict enough
7065 * to encompass the generic architectural permission check.
7067 if (r
->state
!= ARM_CP_STATE_AA32
) {
7071 /* min_EL EL1, but some accessible to EL0 via kernel ABI */
7072 mask
= PL0U_R
| PL1_RW
;
7087 /* unallocated encoding, so not possible */
7095 /* min_EL EL1, secure mode only (we don't check the latter) */
7099 /* broken reginfo with out-of-range opc1 */
7103 /* assert our permissions are not too lax (stricter is fine) */
7104 assert((r
->access
& ~mask
) == 0);
7107 /* Check that the register definition has enough info to handle
7108 * reads and writes if they are permitted.
7110 if (!(r
->type
& (ARM_CP_SPECIAL
|ARM_CP_CONST
))) {
7111 if (r
->access
& PL3_R
) {
7112 assert((r
->fieldoffset
||
7113 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
7116 if (r
->access
& PL3_W
) {
7117 assert((r
->fieldoffset
||
7118 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
7122 /* Bad type field probably means missing sentinel at end of reg list */
7123 assert(cptype_valid(r
->type
));
7124 for (crm
= crmmin
; crm
<= crmmax
; crm
++) {
7125 for (opc1
= opc1min
; opc1
<= opc1max
; opc1
++) {
7126 for (opc2
= opc2min
; opc2
<= opc2max
; opc2
++) {
7127 for (state
= ARM_CP_STATE_AA32
;
7128 state
<= ARM_CP_STATE_AA64
; state
++) {
7129 if (r
->state
!= state
&& r
->state
!= ARM_CP_STATE_BOTH
) {
7132 if (state
== ARM_CP_STATE_AA32
) {
7133 /* Under AArch32 CP registers can be common
7134 * (same for secure and non-secure world) or banked.
7138 switch (r
->secure
) {
7139 case ARM_CP_SECSTATE_S
:
7140 case ARM_CP_SECSTATE_NS
:
7141 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
7142 r
->secure
, crm
, opc1
, opc2
,
7146 name
= g_strdup_printf("%s_S", r
->name
);
7147 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
7149 crm
, opc1
, opc2
, name
);
7151 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
7153 crm
, opc1
, opc2
, r
->name
);
7157 /* AArch64 registers get mapped to non-secure instance
7159 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
7161 crm
, opc1
, opc2
, r
->name
);
7169 void define_arm_cp_regs_with_opaque(ARMCPU
*cpu
,
7170 const ARMCPRegInfo
*regs
, void *opaque
)
7172 /* Define a whole list of registers */
7173 const ARMCPRegInfo
*r
;
7174 for (r
= regs
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
7175 define_one_arm_cp_reg_with_opaque(cpu
, r
, opaque
);
7180 * Modify ARMCPRegInfo for access from userspace.
7182 * This is a data driven modification directed by
7183 * ARMCPRegUserSpaceInfo. All registers become ARM_CP_CONST as
7184 * user-space cannot alter any values and dynamic values pertaining to
7185 * execution state are hidden from user space view anyway.
7187 void modify_arm_cp_regs(ARMCPRegInfo
*regs
, const ARMCPRegUserSpaceInfo
*mods
)
7189 const ARMCPRegUserSpaceInfo
*m
;
7192 for (m
= mods
; m
->name
; m
++) {
7193 GPatternSpec
*pat
= NULL
;
7195 pat
= g_pattern_spec_new(m
->name
);
7197 for (r
= regs
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
7198 if (pat
&& g_pattern_match_string(pat
, r
->name
)) {
7199 r
->type
= ARM_CP_CONST
;
7203 } else if (strcmp(r
->name
, m
->name
) == 0) {
7204 r
->type
= ARM_CP_CONST
;
7206 r
->resetvalue
&= m
->exported_bits
;
7207 r
->resetvalue
|= m
->fixed_bits
;
7212 g_pattern_spec_free(pat
);
7217 const ARMCPRegInfo
*get_arm_cp_reginfo(GHashTable
*cpregs
, uint32_t encoded_cp
)
7219 return g_hash_table_lookup(cpregs
, &encoded_cp
);
7222 void arm_cp_write_ignore(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
7225 /* Helper coprocessor write function for write-ignore registers */
7228 uint64_t arm_cp_read_zero(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
7230 /* Helper coprocessor write function for read-as-zero registers */
7234 void arm_cp_reset_ignore(CPUARMState
*env
, const ARMCPRegInfo
*opaque
)
7236 /* Helper coprocessor reset function for do-nothing-on-reset registers */
7239 static int bad_mode_switch(CPUARMState
*env
, int mode
, CPSRWriteType write_type
)
7241 /* Return true if it is not valid for us to switch to
7242 * this CPU mode (ie all the UNPREDICTABLE cases in
7243 * the ARM ARM CPSRWriteByInstr pseudocode).
7246 /* Changes to or from Hyp via MSR and CPS are illegal. */
7247 if (write_type
== CPSRWriteByInstr
&&
7248 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_HYP
||
7249 mode
== ARM_CPU_MODE_HYP
)) {
7254 case ARM_CPU_MODE_USR
:
7256 case ARM_CPU_MODE_SYS
:
7257 case ARM_CPU_MODE_SVC
:
7258 case ARM_CPU_MODE_ABT
:
7259 case ARM_CPU_MODE_UND
:
7260 case ARM_CPU_MODE_IRQ
:
7261 case ARM_CPU_MODE_FIQ
:
7262 /* Note that we don't implement the IMPDEF NSACR.RFR which in v7
7263 * allows FIQ mode to be Secure-only. (In v8 this doesn't exist.)
7265 /* If HCR.TGE is set then changes from Monitor to NS PL1 via MSR
7266 * and CPS are treated as illegal mode changes.
7268 if (write_type
== CPSRWriteByInstr
&&
7269 (env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
&&
7270 (arm_hcr_el2_eff(env
) & HCR_TGE
)) {
7274 case ARM_CPU_MODE_HYP
:
7275 return !arm_feature(env
, ARM_FEATURE_EL2
)
7276 || arm_current_el(env
) < 2 || arm_is_secure_below_el3(env
);
7277 case ARM_CPU_MODE_MON
:
7278 return arm_current_el(env
) < 3;
7284 uint32_t cpsr_read(CPUARMState
*env
)
7287 ZF
= (env
->ZF
== 0);
7288 return env
->uncached_cpsr
| (env
->NF
& 0x80000000) | (ZF
<< 30) |
7289 (env
->CF
<< 29) | ((env
->VF
& 0x80000000) >> 3) | (env
->QF
<< 27)
7290 | (env
->thumb
<< 5) | ((env
->condexec_bits
& 3) << 25)
7291 | ((env
->condexec_bits
& 0xfc) << 8)
7292 | (env
->GE
<< 16) | (env
->daif
& CPSR_AIF
);
7295 void cpsr_write(CPUARMState
*env
, uint32_t val
, uint32_t mask
,
7296 CPSRWriteType write_type
)
7298 uint32_t changed_daif
;
7300 if (mask
& CPSR_NZCV
) {
7301 env
->ZF
= (~val
) & CPSR_Z
;
7303 env
->CF
= (val
>> 29) & 1;
7304 env
->VF
= (val
<< 3) & 0x80000000;
7307 env
->QF
= ((val
& CPSR_Q
) != 0);
7309 env
->thumb
= ((val
& CPSR_T
) != 0);
7310 if (mask
& CPSR_IT_0_1
) {
7311 env
->condexec_bits
&= ~3;
7312 env
->condexec_bits
|= (val
>> 25) & 3;
7314 if (mask
& CPSR_IT_2_7
) {
7315 env
->condexec_bits
&= 3;
7316 env
->condexec_bits
|= (val
>> 8) & 0xfc;
7318 if (mask
& CPSR_GE
) {
7319 env
->GE
= (val
>> 16) & 0xf;
7322 /* In a V7 implementation that includes the security extensions but does
7323 * not include Virtualization Extensions the SCR.FW and SCR.AW bits control
7324 * whether non-secure software is allowed to change the CPSR_F and CPSR_A
7325 * bits respectively.
7327 * In a V8 implementation, it is permitted for privileged software to
7328 * change the CPSR A/F bits regardless of the SCR.AW/FW bits.
7330 if (write_type
!= CPSRWriteRaw
&& !arm_feature(env
, ARM_FEATURE_V8
) &&
7331 arm_feature(env
, ARM_FEATURE_EL3
) &&
7332 !arm_feature(env
, ARM_FEATURE_EL2
) &&
7333 !arm_is_secure(env
)) {
7335 changed_daif
= (env
->daif
^ val
) & mask
;
7337 if (changed_daif
& CPSR_A
) {
7338 /* Check to see if we are allowed to change the masking of async
7339 * abort exceptions from a non-secure state.
7341 if (!(env
->cp15
.scr_el3
& SCR_AW
)) {
7342 qemu_log_mask(LOG_GUEST_ERROR
,
7343 "Ignoring attempt to switch CPSR_A flag from "
7344 "non-secure world with SCR.AW bit clear\n");
7349 if (changed_daif
& CPSR_F
) {
7350 /* Check to see if we are allowed to change the masking of FIQ
7351 * exceptions from a non-secure state.
7353 if (!(env
->cp15
.scr_el3
& SCR_FW
)) {
7354 qemu_log_mask(LOG_GUEST_ERROR
,
7355 "Ignoring attempt to switch CPSR_F flag from "
7356 "non-secure world with SCR.FW bit clear\n");
7360 /* Check whether non-maskable FIQ (NMFI) support is enabled.
7361 * If this bit is set software is not allowed to mask
7362 * FIQs, but is allowed to set CPSR_F to 0.
7364 if ((A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_NMFI
) &&
7366 qemu_log_mask(LOG_GUEST_ERROR
,
7367 "Ignoring attempt to enable CPSR_F flag "
7368 "(non-maskable FIQ [NMFI] support enabled)\n");
7374 env
->daif
&= ~(CPSR_AIF
& mask
);
7375 env
->daif
|= val
& CPSR_AIF
& mask
;
7377 if (write_type
!= CPSRWriteRaw
&&
7378 ((env
->uncached_cpsr
^ val
) & mask
& CPSR_M
)) {
7379 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
) {
7380 /* Note that we can only get here in USR mode if this is a
7381 * gdb stub write; for this case we follow the architectural
7382 * behaviour for guest writes in USR mode of ignoring an attempt
7383 * to switch mode. (Those are caught by translate.c for writes
7384 * triggered by guest instructions.)
7387 } else if (bad_mode_switch(env
, val
& CPSR_M
, write_type
)) {
7388 /* Attempt to switch to an invalid mode: this is UNPREDICTABLE in
7389 * v7, and has defined behaviour in v8:
7390 * + leave CPSR.M untouched
7391 * + allow changes to the other CPSR fields
7393 * For user changes via the GDB stub, we don't set PSTATE.IL,
7394 * as this would be unnecessarily harsh for a user error.
7397 if (write_type
!= CPSRWriteByGDBStub
&&
7398 arm_feature(env
, ARM_FEATURE_V8
)) {
7402 qemu_log_mask(LOG_GUEST_ERROR
,
7403 "Illegal AArch32 mode switch attempt from %s to %s\n",
7404 aarch32_mode_name(env
->uncached_cpsr
),
7405 aarch32_mode_name(val
));
7407 qemu_log_mask(CPU_LOG_INT
, "%s %s to %s PC 0x%" PRIx32
"\n",
7408 write_type
== CPSRWriteExceptionReturn
?
7409 "Exception return from AArch32" :
7410 "AArch32 mode switch from",
7411 aarch32_mode_name(env
->uncached_cpsr
),
7412 aarch32_mode_name(val
), env
->regs
[15]);
7413 switch_mode(env
, val
& CPSR_M
);
7416 mask
&= ~CACHED_CPSR_BITS
;
7417 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~mask
) | (val
& mask
);
7420 /* Sign/zero extend */
7421 uint32_t HELPER(sxtb16
)(uint32_t x
)
7424 res
= (uint16_t)(int8_t)x
;
7425 res
|= (uint32_t)(int8_t)(x
>> 16) << 16;
7429 uint32_t HELPER(uxtb16
)(uint32_t x
)
7432 res
= (uint16_t)(uint8_t)x
;
7433 res
|= (uint32_t)(uint8_t)(x
>> 16) << 16;
7437 int32_t HELPER(sdiv
)(int32_t num
, int32_t den
)
7441 if (num
== INT_MIN
&& den
== -1)
7446 uint32_t HELPER(udiv
)(uint32_t num
, uint32_t den
)
7453 uint32_t HELPER(rbit
)(uint32_t x
)
7458 #ifdef CONFIG_USER_ONLY
7460 /* These should probably raise undefined insn exceptions. */
7461 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t reg
, uint32_t val
)
7463 ARMCPU
*cpu
= env_archcpu(env
);
7465 cpu_abort(CPU(cpu
), "v7m_msr %d\n", reg
);
7468 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
7470 ARMCPU
*cpu
= env_archcpu(env
);
7472 cpu_abort(CPU(cpu
), "v7m_mrs %d\n", reg
);
7476 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
7478 /* translate.c should never generate calls here in user-only mode */
7479 g_assert_not_reached();
7482 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
7484 /* translate.c should never generate calls here in user-only mode */
7485 g_assert_not_reached();
7488 void HELPER(v7m_preserve_fp_state
)(CPUARMState
*env
)
7490 /* translate.c should never generate calls here in user-only mode */
7491 g_assert_not_reached();
7494 void HELPER(v7m_vlstm
)(CPUARMState
*env
, uint32_t fptr
)
7496 /* translate.c should never generate calls here in user-only mode */
7497 g_assert_not_reached();
7500 void HELPER(v7m_vlldm
)(CPUARMState
*env
, uint32_t fptr
)
7502 /* translate.c should never generate calls here in user-only mode */
7503 g_assert_not_reached();
7506 uint32_t HELPER(v7m_tt
)(CPUARMState
*env
, uint32_t addr
, uint32_t op
)
7509 * The TT instructions can be used by unprivileged code, but in
7510 * user-only emulation we don't have the MPU.
7511 * Luckily since we know we are NonSecure unprivileged (and that in
7512 * turn means that the A flag wasn't specified), all the bits in the
7513 * register must be zero:
7514 * IREGION: 0 because IRVALID is 0
7515 * IRVALID: 0 because NS
7517 * NSRW: 0 because NS
7519 * RW: 0 because unpriv and A flag not set
7520 * R: 0 because unpriv and A flag not set
7521 * SRVALID: 0 because NS
7522 * MRVALID: 0 because unpriv and A flag not set
7523 * SREGION: 0 becaus SRVALID is 0
7524 * MREGION: 0 because MRVALID is 0
7529 static void switch_mode(CPUARMState
*env
, int mode
)
7531 ARMCPU
*cpu
= env_archcpu(env
);
7533 if (mode
!= ARM_CPU_MODE_USR
) {
7534 cpu_abort(CPU(cpu
), "Tried to switch out of user mode\n");
7538 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
7539 uint32_t cur_el
, bool secure
)
7544 void aarch64_sync_64_to_32(CPUARMState
*env
)
7546 g_assert_not_reached();
7551 static void switch_mode(CPUARMState
*env
, int mode
)
7556 old_mode
= env
->uncached_cpsr
& CPSR_M
;
7557 if (mode
== old_mode
)
7560 if (old_mode
== ARM_CPU_MODE_FIQ
) {
7561 memcpy (env
->fiq_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
7562 memcpy (env
->regs
+ 8, env
->usr_regs
, 5 * sizeof(uint32_t));
7563 } else if (mode
== ARM_CPU_MODE_FIQ
) {
7564 memcpy (env
->usr_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
7565 memcpy (env
->regs
+ 8, env
->fiq_regs
, 5 * sizeof(uint32_t));
7568 i
= bank_number(old_mode
);
7569 env
->banked_r13
[i
] = env
->regs
[13];
7570 env
->banked_spsr
[i
] = env
->spsr
;
7572 i
= bank_number(mode
);
7573 env
->regs
[13] = env
->banked_r13
[i
];
7574 env
->spsr
= env
->banked_spsr
[i
];
7576 env
->banked_r14
[r14_bank_number(old_mode
)] = env
->regs
[14];
7577 env
->regs
[14] = env
->banked_r14
[r14_bank_number(mode
)];
7580 /* Physical Interrupt Target EL Lookup Table
7582 * [ From ARM ARM section G1.13.4 (Table G1-15) ]
7584 * The below multi-dimensional table is used for looking up the target
7585 * exception level given numerous condition criteria. Specifically, the
7586 * target EL is based on SCR and HCR routing controls as well as the
7587 * currently executing EL and secure state.
7590 * target_el_table[2][2][2][2][2][4]
7591 * | | | | | +--- Current EL
7592 * | | | | +------ Non-secure(0)/Secure(1)
7593 * | | | +--------- HCR mask override
7594 * | | +------------ SCR exec state control
7595 * | +--------------- SCR mask override
7596 * +------------------ 32-bit(0)/64-bit(1) EL3
7598 * The table values are as such:
7602 * The ARM ARM target EL table includes entries indicating that an "exception
7603 * is not taken". The two cases where this is applicable are:
7604 * 1) An exception is taken from EL3 but the SCR does not have the exception
7606 * 2) An exception is taken from EL2 but the HCR does not have the exception
7608 * In these two cases, the below table contain a target of EL1. This value is
7609 * returned as it is expected that the consumer of the table data will check
7610 * for "target EL >= current EL" to ensure the exception is not taken.
7614 * BIT IRQ IMO Non-secure Secure
7615 * EL3 FIQ RW FMO EL0 EL1 EL2 EL3 EL0 EL1 EL2 EL3
7617 static const int8_t target_el_table
[2][2][2][2][2][4] = {
7618 {{{{/* 0 0 0 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
7619 {/* 0 0 0 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},
7620 {{/* 0 0 1 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
7621 {/* 0 0 1 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},},
7622 {{{/* 0 1 0 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
7623 {/* 0 1 0 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},
7624 {{/* 0 1 1 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
7625 {/* 0 1 1 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},},},
7626 {{{{/* 1 0 0 0 */{ 1, 1, 2, -1 },{ 1, 1, -1, 1 },},
7627 {/* 1 0 0 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},
7628 {{/* 1 0 1 0 */{ 1, 1, 1, -1 },{ 1, 1, -1, 1 },},
7629 {/* 1 0 1 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},},
7630 {{{/* 1 1 0 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
7631 {/* 1 1 0 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},
7632 {{/* 1 1 1 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
7633 {/* 1 1 1 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},},},
7637 * Determine the target EL for physical exceptions
7639 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
7640 uint32_t cur_el
, bool secure
)
7642 CPUARMState
*env
= cs
->env_ptr
;
7647 /* Is the highest EL AArch64? */
7648 bool is64
= arm_feature(env
, ARM_FEATURE_AARCH64
);
7651 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
7652 rw
= ((env
->cp15
.scr_el3
& SCR_RW
) == SCR_RW
);
7654 /* Either EL2 is the highest EL (and so the EL2 register width
7655 * is given by is64); or there is no EL2 or EL3, in which case
7656 * the value of 'rw' does not affect the table lookup anyway.
7661 hcr_el2
= arm_hcr_el2_eff(env
);
7664 scr
= ((env
->cp15
.scr_el3
& SCR_IRQ
) == SCR_IRQ
);
7665 hcr
= hcr_el2
& HCR_IMO
;
7668 scr
= ((env
->cp15
.scr_el3
& SCR_FIQ
) == SCR_FIQ
);
7669 hcr
= hcr_el2
& HCR_FMO
;
7672 scr
= ((env
->cp15
.scr_el3
& SCR_EA
) == SCR_EA
);
7673 hcr
= hcr_el2
& HCR_AMO
;
7677 /* Perform a table-lookup for the target EL given the current state */
7678 target_el
= target_el_table
[is64
][scr
][rw
][hcr
][secure
][cur_el
];
7680 assert(target_el
> 0);
7685 void arm_log_exception(int idx
)
7687 if (qemu_loglevel_mask(CPU_LOG_INT
)) {
7688 const char *exc
= NULL
;
7689 static const char * const excnames
[] = {
7690 [EXCP_UDEF
] = "Undefined Instruction",
7692 [EXCP_PREFETCH_ABORT
] = "Prefetch Abort",
7693 [EXCP_DATA_ABORT
] = "Data Abort",
7696 [EXCP_BKPT
] = "Breakpoint",
7697 [EXCP_EXCEPTION_EXIT
] = "QEMU v7M exception exit",
7698 [EXCP_KERNEL_TRAP
] = "QEMU intercept of kernel commpage",
7699 [EXCP_HVC
] = "Hypervisor Call",
7700 [EXCP_HYP_TRAP
] = "Hypervisor Trap",
7701 [EXCP_SMC
] = "Secure Monitor Call",
7702 [EXCP_VIRQ
] = "Virtual IRQ",
7703 [EXCP_VFIQ
] = "Virtual FIQ",
7704 [EXCP_SEMIHOST
] = "Semihosting call",
7705 [EXCP_NOCP
] = "v7M NOCP UsageFault",
7706 [EXCP_INVSTATE
] = "v7M INVSTATE UsageFault",
7707 [EXCP_STKOF
] = "v8M STKOF UsageFault",
7708 [EXCP_LAZYFP
] = "v7M exception during lazy FP stacking",
7709 [EXCP_LSERR
] = "v8M LSERR UsageFault",
7710 [EXCP_UNALIGNED
] = "v7M UNALIGNED UsageFault",
7713 if (idx
>= 0 && idx
< ARRAY_SIZE(excnames
)) {
7714 exc
= excnames
[idx
];
7719 qemu_log_mask(CPU_LOG_INT
, "Taking exception %d [%s]\n", idx
, exc
);
7724 * What kind of stack write are we doing? This affects how exceptions
7725 * generated during the stacking are treated.
7727 typedef enum StackingMode
{
7733 static bool v7m_stack_write(ARMCPU
*cpu
, uint32_t addr
, uint32_t value
,
7734 ARMMMUIdx mmu_idx
, StackingMode mode
)
7736 CPUState
*cs
= CPU(cpu
);
7737 CPUARMState
*env
= &cpu
->env
;
7738 MemTxAttrs attrs
= {};
7740 target_ulong page_size
;
7743 ARMMMUFaultInfo fi
= {};
7744 bool secure
= mmu_idx
& ARM_MMU_IDX_M_S
;
7748 if (get_phys_addr(env
, addr
, MMU_DATA_STORE
, mmu_idx
, &physaddr
,
7749 &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
7750 /* MPU/SAU lookup failed */
7751 if (fi
.type
== ARMFault_QEMU_SFault
) {
7752 if (mode
== STACK_LAZYFP
) {
7753 qemu_log_mask(CPU_LOG_INT
,
7754 "...SecureFault with SFSR.LSPERR "
7755 "during lazy stacking\n");
7756 env
->v7m
.sfsr
|= R_V7M_SFSR_LSPERR_MASK
;
7758 qemu_log_mask(CPU_LOG_INT
,
7759 "...SecureFault with SFSR.AUVIOL "
7760 "during stacking\n");
7761 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
;
7763 env
->v7m
.sfsr
|= R_V7M_SFSR_SFARVALID_MASK
;
7764 env
->v7m
.sfar
= addr
;
7765 exc
= ARMV7M_EXCP_SECURE
;
7768 if (mode
== STACK_LAZYFP
) {
7769 qemu_log_mask(CPU_LOG_INT
,
7770 "...MemManageFault with CFSR.MLSPERR\n");
7771 env
->v7m
.cfsr
[secure
] |= R_V7M_CFSR_MLSPERR_MASK
;
7773 qemu_log_mask(CPU_LOG_INT
,
7774 "...MemManageFault with CFSR.MSTKERR\n");
7775 env
->v7m
.cfsr
[secure
] |= R_V7M_CFSR_MSTKERR_MASK
;
7777 exc
= ARMV7M_EXCP_MEM
;
7778 exc_secure
= secure
;
7782 address_space_stl_le(arm_addressspace(cs
, attrs
), physaddr
, value
,
7784 if (txres
!= MEMTX_OK
) {
7785 /* BusFault trying to write the data */
7786 if (mode
== STACK_LAZYFP
) {
7787 qemu_log_mask(CPU_LOG_INT
, "...BusFault with BFSR.LSPERR\n");
7788 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_LSPERR_MASK
;
7790 qemu_log_mask(CPU_LOG_INT
, "...BusFault with BFSR.STKERR\n");
7791 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_STKERR_MASK
;
7793 exc
= ARMV7M_EXCP_BUS
;
7801 * By pending the exception at this point we are making
7802 * the IMPDEF choice "overridden exceptions pended" (see the
7803 * MergeExcInfo() pseudocode). The other choice would be to not
7804 * pend them now and then make a choice about which to throw away
7805 * later if we have two derived exceptions.
7806 * The only case when we must not pend the exception but instead
7807 * throw it away is if we are doing the push of the callee registers
7808 * and we've already generated a derived exception (this is indicated
7809 * by the caller passing STACK_IGNFAULTS). Even in this case we will
7810 * still update the fault status registers.
7814 armv7m_nvic_set_pending_derived(env
->nvic
, exc
, exc_secure
);
7817 armv7m_nvic_set_pending_lazyfp(env
->nvic
, exc
, exc_secure
);
7819 case STACK_IGNFAULTS
:
7825 static bool v7m_stack_read(ARMCPU
*cpu
, uint32_t *dest
, uint32_t addr
,
7828 CPUState
*cs
= CPU(cpu
);
7829 CPUARMState
*env
= &cpu
->env
;
7830 MemTxAttrs attrs
= {};
7832 target_ulong page_size
;
7835 ARMMMUFaultInfo fi
= {};
7836 bool secure
= mmu_idx
& ARM_MMU_IDX_M_S
;
7841 if (get_phys_addr(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &physaddr
,
7842 &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
7843 /* MPU/SAU lookup failed */
7844 if (fi
.type
== ARMFault_QEMU_SFault
) {
7845 qemu_log_mask(CPU_LOG_INT
,
7846 "...SecureFault with SFSR.AUVIOL during unstack\n");
7847 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
| R_V7M_SFSR_SFARVALID_MASK
;
7848 env
->v7m
.sfar
= addr
;
7849 exc
= ARMV7M_EXCP_SECURE
;
7852 qemu_log_mask(CPU_LOG_INT
,
7853 "...MemManageFault with CFSR.MUNSTKERR\n");
7854 env
->v7m
.cfsr
[secure
] |= R_V7M_CFSR_MUNSTKERR_MASK
;
7855 exc
= ARMV7M_EXCP_MEM
;
7856 exc_secure
= secure
;
7861 value
= address_space_ldl(arm_addressspace(cs
, attrs
), physaddr
,
7863 if (txres
!= MEMTX_OK
) {
7864 /* BusFault trying to read the data */
7865 qemu_log_mask(CPU_LOG_INT
, "...BusFault with BFSR.UNSTKERR\n");
7866 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_UNSTKERR_MASK
;
7867 exc
= ARMV7M_EXCP_BUS
;
7877 * By pending the exception at this point we are making
7878 * the IMPDEF choice "overridden exceptions pended" (see the
7879 * MergeExcInfo() pseudocode). The other choice would be to not
7880 * pend them now and then make a choice about which to throw away
7881 * later if we have two derived exceptions.
7883 armv7m_nvic_set_pending(env
->nvic
, exc
, exc_secure
);
7887 void HELPER(v7m_preserve_fp_state
)(CPUARMState
*env
)
7890 * Preserve FP state (because LSPACT was set and we are about
7891 * to execute an FP instruction). This corresponds to the
7892 * PreserveFPState() pseudocode.
7893 * We may throw an exception if the stacking fails.
7895 ARMCPU
*cpu
= env_archcpu(env
);
7896 bool is_secure
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_S_MASK
;
7897 bool negpri
= !(env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_HFRDY_MASK
);
7898 bool is_priv
= !(env
->v7m
.fpccr
[is_secure
] & R_V7M_FPCCR_USER_MASK
);
7899 bool splimviol
= env
->v7m
.fpccr
[is_secure
] & R_V7M_FPCCR_SPLIMVIOL_MASK
;
7900 uint32_t fpcar
= env
->v7m
.fpcar
[is_secure
];
7901 bool stacked_ok
= true;
7902 bool ts
= is_secure
&& (env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_TS_MASK
);
7903 bool take_exception
;
7905 /* Take the iothread lock as we are going to touch the NVIC */
7906 qemu_mutex_lock_iothread();
7908 /* Check the background context had access to the FPU */
7909 if (!v7m_cpacr_pass(env
, is_secure
, is_priv
)) {
7910 armv7m_nvic_set_pending_lazyfp(env
->nvic
, ARMV7M_EXCP_USAGE
, is_secure
);
7911 env
->v7m
.cfsr
[is_secure
] |= R_V7M_CFSR_NOCP_MASK
;
7913 } else if (!is_secure
&& !extract32(env
->v7m
.nsacr
, 10, 1)) {
7914 armv7m_nvic_set_pending_lazyfp(env
->nvic
, ARMV7M_EXCP_USAGE
, M_REG_S
);
7915 env
->v7m
.cfsr
[M_REG_S
] |= R_V7M_CFSR_NOCP_MASK
;
7919 if (!splimviol
&& stacked_ok
) {
7920 /* We only stack if the stack limit wasn't violated */
7924 mmu_idx
= arm_v7m_mmu_idx_all(env
, is_secure
, is_priv
, negpri
);
7925 for (i
= 0; i
< (ts
? 32 : 16); i
+= 2) {
7926 uint64_t dn
= *aa32_vfp_dreg(env
, i
/ 2);
7927 uint32_t faddr
= fpcar
+ 4 * i
;
7928 uint32_t slo
= extract64(dn
, 0, 32);
7929 uint32_t shi
= extract64(dn
, 32, 32);
7932 faddr
+= 8; /* skip the slot for the FPSCR */
7934 stacked_ok
= stacked_ok
&&
7935 v7m_stack_write(cpu
, faddr
, slo
, mmu_idx
, STACK_LAZYFP
) &&
7936 v7m_stack_write(cpu
, faddr
+ 4, shi
, mmu_idx
, STACK_LAZYFP
);
7939 stacked_ok
= stacked_ok
&&
7940 v7m_stack_write(cpu
, fpcar
+ 0x40,
7941 vfp_get_fpscr(env
), mmu_idx
, STACK_LAZYFP
);
7945 * We definitely pended an exception, but it's possible that it
7946 * might not be able to be taken now. If its priority permits us
7947 * to take it now, then we must not update the LSPACT or FP regs,
7948 * but instead jump out to take the exception immediately.
7949 * If it's just pending and won't be taken until the current
7950 * handler exits, then we do update LSPACT and the FP regs.
7952 take_exception
= !stacked_ok
&&
7953 armv7m_nvic_can_take_pending_exception(env
->nvic
);
7955 qemu_mutex_unlock_iothread();
7957 if (take_exception
) {
7958 raise_exception_ra(env
, EXCP_LAZYFP
, 0, 1, GETPC());
7961 env
->v7m
.fpccr
[is_secure
] &= ~R_V7M_FPCCR_LSPACT_MASK
;
7964 /* Clear s0 to s31 and the FPSCR */
7967 for (i
= 0; i
< 32; i
+= 2) {
7968 *aa32_vfp_dreg(env
, i
/ 2) = 0;
7970 vfp_set_fpscr(env
, 0);
7973 * Otherwise s0 to s15 and FPSCR are UNKNOWN; we choose to leave them
7979 * Write to v7M CONTROL.SPSEL bit for the specified security bank.
7980 * This may change the current stack pointer between Main and Process
7981 * stack pointers if it is done for the CONTROL register for the current
7984 static void write_v7m_control_spsel_for_secstate(CPUARMState
*env
,
7988 bool old_is_psp
= v7m_using_psp(env
);
7990 env
->v7m
.control
[secstate
] =
7991 deposit32(env
->v7m
.control
[secstate
],
7992 R_V7M_CONTROL_SPSEL_SHIFT
,
7993 R_V7M_CONTROL_SPSEL_LENGTH
, new_spsel
);
7995 if (secstate
== env
->v7m
.secure
) {
7996 bool new_is_psp
= v7m_using_psp(env
);
7999 if (old_is_psp
!= new_is_psp
) {
8000 tmp
= env
->v7m
.other_sp
;
8001 env
->v7m
.other_sp
= env
->regs
[13];
8002 env
->regs
[13] = tmp
;
8008 * Write to v7M CONTROL.SPSEL bit. This may change the current
8009 * stack pointer between Main and Process stack pointers.
8011 static void write_v7m_control_spsel(CPUARMState
*env
, bool new_spsel
)
8013 write_v7m_control_spsel_for_secstate(env
, new_spsel
, env
->v7m
.secure
);
8016 void write_v7m_exception(CPUARMState
*env
, uint32_t new_exc
)
8019 * Write a new value to v7m.exception, thus transitioning into or out
8020 * of Handler mode; this may result in a change of active stack pointer.
8022 bool new_is_psp
, old_is_psp
= v7m_using_psp(env
);
8025 env
->v7m
.exception
= new_exc
;
8027 new_is_psp
= v7m_using_psp(env
);
8029 if (old_is_psp
!= new_is_psp
) {
8030 tmp
= env
->v7m
.other_sp
;
8031 env
->v7m
.other_sp
= env
->regs
[13];
8032 env
->regs
[13] = tmp
;
8036 /* Switch M profile security state between NS and S */
8037 static void switch_v7m_security_state(CPUARMState
*env
, bool new_secstate
)
8039 uint32_t new_ss_msp
, new_ss_psp
;
8041 if (env
->v7m
.secure
== new_secstate
) {
8046 * All the banked state is accessed by looking at env->v7m.secure
8047 * except for the stack pointer; rearrange the SP appropriately.
8049 new_ss_msp
= env
->v7m
.other_ss_msp
;
8050 new_ss_psp
= env
->v7m
.other_ss_psp
;
8052 if (v7m_using_psp(env
)) {
8053 env
->v7m
.other_ss_psp
= env
->regs
[13];
8054 env
->v7m
.other_ss_msp
= env
->v7m
.other_sp
;
8056 env
->v7m
.other_ss_msp
= env
->regs
[13];
8057 env
->v7m
.other_ss_psp
= env
->v7m
.other_sp
;
8060 env
->v7m
.secure
= new_secstate
;
8062 if (v7m_using_psp(env
)) {
8063 env
->regs
[13] = new_ss_psp
;
8064 env
->v7m
.other_sp
= new_ss_msp
;
8066 env
->regs
[13] = new_ss_msp
;
8067 env
->v7m
.other_sp
= new_ss_psp
;
8071 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
8075 * - if the return value is a magic value, do exception return (like BX)
8076 * - otherwise bit 0 of the return value is the target security state
8080 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8081 /* Covers FNC_RETURN and EXC_RETURN magic */
8082 min_magic
= FNC_RETURN_MIN_MAGIC
;
8084 /* EXC_RETURN magic only */
8085 min_magic
= EXC_RETURN_MIN_MAGIC
;
8088 if (dest
>= min_magic
) {
8090 * This is an exception return magic value; put it where
8091 * do_v7m_exception_exit() expects and raise EXCEPTION_EXIT.
8092 * Note that if we ever add gen_ss_advance() singlestep support to
8093 * M profile this should count as an "instruction execution complete"
8094 * event (compare gen_bx_excret_final_code()).
8096 env
->regs
[15] = dest
& ~1;
8097 env
->thumb
= dest
& 1;
8098 HELPER(exception_internal
)(env
, EXCP_EXCEPTION_EXIT
);
8102 /* translate.c should have made BXNS UNDEF unless we're secure */
8103 assert(env
->v7m
.secure
);
8106 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
8108 switch_v7m_security_state(env
, dest
& 1);
8110 env
->regs
[15] = dest
& ~1;
8113 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
8117 * - bit 0 of the destination address is the target security state
8120 /* At this point regs[15] is the address just after the BLXNS */
8121 uint32_t nextinst
= env
->regs
[15] | 1;
8122 uint32_t sp
= env
->regs
[13] - 8;
8125 /* translate.c will have made BLXNS UNDEF unless we're secure */
8126 assert(env
->v7m
.secure
);
8130 * Target is Secure, so this is just a normal BLX,
8131 * except that the low bit doesn't indicate Thumb/not.
8133 env
->regs
[14] = nextinst
;
8135 env
->regs
[15] = dest
& ~1;
8139 /* Target is non-secure: first push a stack frame */
8140 if (!QEMU_IS_ALIGNED(sp
, 8)) {
8141 qemu_log_mask(LOG_GUEST_ERROR
,
8142 "BLXNS with misaligned SP is UNPREDICTABLE\n");
8145 if (sp
< v7m_sp_limit(env
)) {
8146 raise_exception(env
, EXCP_STKOF
, 0, 1);
8149 saved_psr
= env
->v7m
.exception
;
8150 if (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
) {
8151 saved_psr
|= XPSR_SFPA
;
8154 /* Note that these stores can throw exceptions on MPU faults */
8155 cpu_stl_data(env
, sp
, nextinst
);
8156 cpu_stl_data(env
, sp
+ 4, saved_psr
);
8159 env
->regs
[14] = 0xfeffffff;
8160 if (arm_v7m_is_handler_mode(env
)) {
8162 * Write a dummy value to IPSR, to avoid leaking the current secure
8163 * exception number to non-secure code. This is guaranteed not
8164 * to cause write_v7m_exception() to actually change stacks.
8166 write_v7m_exception(env
, 1);
8168 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
8169 switch_v7m_security_state(env
, 0);
8171 env
->regs
[15] = dest
;
8174 static uint32_t *get_v7m_sp_ptr(CPUARMState
*env
, bool secure
, bool threadmode
,
8178 * Return a pointer to the location where we currently store the
8179 * stack pointer for the requested security state and thread mode.
8180 * This pointer will become invalid if the CPU state is updated
8181 * such that the stack pointers are switched around (eg changing
8182 * the SPSEL control bit).
8183 * Compare the v8M ARM ARM pseudocode LookUpSP_with_security_mode().
8184 * Unlike that pseudocode, we require the caller to pass us in the
8185 * SPSEL control bit value; this is because we also use this
8186 * function in handling of pushing of the callee-saves registers
8187 * part of the v8M stack frame (pseudocode PushCalleeStack()),
8188 * and in the tailchain codepath the SPSEL bit comes from the exception
8189 * return magic LR value from the previous exception. The pseudocode
8190 * opencodes the stack-selection in PushCalleeStack(), but we prefer
8191 * to make this utility function generic enough to do the job.
8193 bool want_psp
= threadmode
&& spsel
;
8195 if (secure
== env
->v7m
.secure
) {
8196 if (want_psp
== v7m_using_psp(env
)) {
8197 return &env
->regs
[13];
8199 return &env
->v7m
.other_sp
;
8203 return &env
->v7m
.other_ss_psp
;
8205 return &env
->v7m
.other_ss_msp
;
8210 static bool arm_v7m_load_vector(ARMCPU
*cpu
, int exc
, bool targets_secure
,
8213 CPUState
*cs
= CPU(cpu
);
8214 CPUARMState
*env
= &cpu
->env
;
8216 uint32_t addr
= env
->v7m
.vecbase
[targets_secure
] + exc
* 4;
8217 uint32_t vector_entry
;
8218 MemTxAttrs attrs
= {};
8222 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, targets_secure
, true);
8225 * We don't do a get_phys_addr() here because the rules for vector
8226 * loads are special: they always use the default memory map, and
8227 * the default memory map permits reads from all addresses.
8228 * Since there's no easy way to pass through to pmsav8_mpu_lookup()
8229 * that we want this special case which would always say "yes",
8230 * we just do the SAU lookup here followed by a direct physical load.
8232 attrs
.secure
= targets_secure
;
8235 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8236 V8M_SAttributes sattrs
= {};
8238 v8m_security_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &sattrs
);
8240 attrs
.secure
= false;
8241 } else if (!targets_secure
) {
8242 /* NS access to S memory */
8247 vector_entry
= address_space_ldl(arm_addressspace(cs
, attrs
), addr
,
8249 if (result
!= MEMTX_OK
) {
8252 *pvec
= vector_entry
;
8257 * All vector table fetch fails are reported as HardFault, with
8258 * HFSR.VECTTBL and .FORCED set. (FORCED is set because
8259 * technically the underlying exception is a MemManage or BusFault
8260 * that is escalated to HardFault.) This is a terminal exception,
8261 * so we will either take the HardFault immediately or else enter
8262 * lockup (the latter case is handled in armv7m_nvic_set_pending_derived()).
8264 exc_secure
= targets_secure
||
8265 !(cpu
->env
.v7m
.aircr
& R_V7M_AIRCR_BFHFNMINS_MASK
);
8266 env
->v7m
.hfsr
|= R_V7M_HFSR_VECTTBL_MASK
| R_V7M_HFSR_FORCED_MASK
;
8267 armv7m_nvic_set_pending_derived(env
->nvic
, ARMV7M_EXCP_HARD
, exc_secure
);
8271 static uint32_t v7m_integrity_sig(CPUARMState
*env
, uint32_t lr
)
8274 * Return the integrity signature value for the callee-saves
8275 * stack frame section. @lr is the exception return payload/LR value
8276 * whose FType bit forms bit 0 of the signature if FP is present.
8278 uint32_t sig
= 0xfefa125a;
8280 if (!arm_feature(env
, ARM_FEATURE_VFP
) || (lr
& R_V7M_EXCRET_FTYPE_MASK
)) {
8286 static bool v7m_push_callee_stack(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
,
8290 * For v8M, push the callee-saves register part of the stack frame.
8291 * Compare the v8M pseudocode PushCalleeStack().
8292 * In the tailchaining case this may not be the current stack.
8294 CPUARMState
*env
= &cpu
->env
;
8295 uint32_t *frame_sp_p
;
8302 StackingMode smode
= ignore_faults
? STACK_IGNFAULTS
: STACK_NORMAL
;
8305 bool mode
= lr
& R_V7M_EXCRET_MODE_MASK
;
8306 bool priv
= !(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_NPRIV_MASK
) ||
8309 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, M_REG_S
, priv
);
8310 frame_sp_p
= get_v7m_sp_ptr(env
, M_REG_S
, mode
,
8311 lr
& R_V7M_EXCRET_SPSEL_MASK
);
8312 want_psp
= mode
&& (lr
& R_V7M_EXCRET_SPSEL_MASK
);
8314 limit
= env
->v7m
.psplim
[M_REG_S
];
8316 limit
= env
->v7m
.msplim
[M_REG_S
];
8319 mmu_idx
= arm_mmu_idx(env
);
8320 frame_sp_p
= &env
->regs
[13];
8321 limit
= v7m_sp_limit(env
);
8324 frameptr
= *frame_sp_p
- 0x28;
8325 if (frameptr
< limit
) {
8327 * Stack limit failure: set SP to the limit value, and generate
8328 * STKOF UsageFault. Stack pushes below the limit must not be
8329 * performed. It is IMPDEF whether pushes above the limit are
8330 * performed; we choose not to.
8332 qemu_log_mask(CPU_LOG_INT
,
8333 "...STKOF during callee-saves register stacking\n");
8334 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_STKOF_MASK
;
8335 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
8337 *frame_sp_p
= limit
;
8342 * Write as much of the stack frame as we can. A write failure may
8343 * cause us to pend a derived exception.
8345 sig
= v7m_integrity_sig(env
, lr
);
8347 v7m_stack_write(cpu
, frameptr
, sig
, mmu_idx
, smode
) &&
8348 v7m_stack_write(cpu
, frameptr
+ 0x8, env
->regs
[4], mmu_idx
, smode
) &&
8349 v7m_stack_write(cpu
, frameptr
+ 0xc, env
->regs
[5], mmu_idx
, smode
) &&
8350 v7m_stack_write(cpu
, frameptr
+ 0x10, env
->regs
[6], mmu_idx
, smode
) &&
8351 v7m_stack_write(cpu
, frameptr
+ 0x14, env
->regs
[7], mmu_idx
, smode
) &&
8352 v7m_stack_write(cpu
, frameptr
+ 0x18, env
->regs
[8], mmu_idx
, smode
) &&
8353 v7m_stack_write(cpu
, frameptr
+ 0x1c, env
->regs
[9], mmu_idx
, smode
) &&
8354 v7m_stack_write(cpu
, frameptr
+ 0x20, env
->regs
[10], mmu_idx
, smode
) &&
8355 v7m_stack_write(cpu
, frameptr
+ 0x24, env
->regs
[11], mmu_idx
, smode
);
8357 /* Update SP regardless of whether any of the stack accesses failed. */
8358 *frame_sp_p
= frameptr
;
8363 static void v7m_exception_taken(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
,
8364 bool ignore_stackfaults
)
8367 * Do the "take the exception" parts of exception entry,
8368 * but not the pushing of state to the stack. This is
8369 * similar to the pseudocode ExceptionTaken() function.
8371 CPUARMState
*env
= &cpu
->env
;
8373 bool targets_secure
;
8375 bool push_failed
= false;
8377 armv7m_nvic_get_pending_irq_info(env
->nvic
, &exc
, &targets_secure
);
8378 qemu_log_mask(CPU_LOG_INT
, "...taking pending %s exception %d\n",
8379 targets_secure
? "secure" : "nonsecure", exc
);
8382 /* Sanitize LR FType and PREFIX bits */
8383 if (!arm_feature(env
, ARM_FEATURE_VFP
)) {
8384 lr
|= R_V7M_EXCRET_FTYPE_MASK
;
8386 lr
= deposit32(lr
, 24, 8, 0xff);
8389 if (arm_feature(env
, ARM_FEATURE_V8
)) {
8390 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
8391 (lr
& R_V7M_EXCRET_S_MASK
)) {
8393 * The background code (the owner of the registers in the
8394 * exception frame) is Secure. This means it may either already
8395 * have or now needs to push callee-saves registers.
8397 if (targets_secure
) {
8398 if (dotailchain
&& !(lr
& R_V7M_EXCRET_ES_MASK
)) {
8400 * We took an exception from Secure to NonSecure
8401 * (which means the callee-saved registers got stacked)
8402 * and are now tailchaining to a Secure exception.
8403 * Clear DCRS so eventual return from this Secure
8404 * exception unstacks the callee-saved registers.
8406 lr
&= ~R_V7M_EXCRET_DCRS_MASK
;
8410 * We're going to a non-secure exception; push the
8411 * callee-saves registers to the stack now, if they're
8412 * not already saved.
8414 if (lr
& R_V7M_EXCRET_DCRS_MASK
&&
8415 !(dotailchain
&& !(lr
& R_V7M_EXCRET_ES_MASK
))) {
8416 push_failed
= v7m_push_callee_stack(cpu
, lr
, dotailchain
,
8417 ignore_stackfaults
);
8419 lr
|= R_V7M_EXCRET_DCRS_MASK
;
8423 lr
&= ~R_V7M_EXCRET_ES_MASK
;
8424 if (targets_secure
|| !arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8425 lr
|= R_V7M_EXCRET_ES_MASK
;
8427 lr
&= ~R_V7M_EXCRET_SPSEL_MASK
;
8428 if (env
->v7m
.control
[targets_secure
] & R_V7M_CONTROL_SPSEL_MASK
) {
8429 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
8433 * Clear registers if necessary to prevent non-secure exception
8434 * code being able to see register values from secure code.
8435 * Where register values become architecturally UNKNOWN we leave
8436 * them with their previous values.
8438 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8439 if (!targets_secure
) {
8441 * Always clear the caller-saved registers (they have been
8442 * pushed to the stack earlier in v7m_push_stack()).
8443 * Clear callee-saved registers if the background code is
8444 * Secure (in which case these regs were saved in
8445 * v7m_push_callee_stack()).
8449 for (i
= 0; i
< 13; i
++) {
8450 /* r4..r11 are callee-saves, zero only if EXCRET.S == 1 */
8451 if (i
< 4 || i
> 11 || (lr
& R_V7M_EXCRET_S_MASK
)) {
8456 xpsr_write(env
, 0, XPSR_NZCV
| XPSR_Q
| XPSR_GE
| XPSR_IT
);
8461 if (push_failed
&& !ignore_stackfaults
) {
8463 * Derived exception on callee-saves register stacking:
8464 * we might now want to take a different exception which
8465 * targets a different security state, so try again from the top.
8467 qemu_log_mask(CPU_LOG_INT
,
8468 "...derived exception on callee-saves register stacking");
8469 v7m_exception_taken(cpu
, lr
, true, true);
8473 if (!arm_v7m_load_vector(cpu
, exc
, targets_secure
, &addr
)) {
8474 /* Vector load failed: derived exception */
8475 qemu_log_mask(CPU_LOG_INT
, "...derived exception on vector table load");
8476 v7m_exception_taken(cpu
, lr
, true, true);
8481 * Now we've done everything that might cause a derived exception
8482 * we can go ahead and activate whichever exception we're going to
8483 * take (which might now be the derived exception).
8485 armv7m_nvic_acknowledge_irq(env
->nvic
);
8487 /* Switch to target security state -- must do this before writing SPSEL */
8488 switch_v7m_security_state(env
, targets_secure
);
8489 write_v7m_control_spsel(env
, 0);
8490 arm_clear_exclusive(env
);
8491 /* Clear SFPA and FPCA (has no effect if no FPU) */
8492 env
->v7m
.control
[M_REG_S
] &=
8493 ~(R_V7M_CONTROL_FPCA_MASK
| R_V7M_CONTROL_SFPA_MASK
);
8495 env
->condexec_bits
= 0;
8497 env
->regs
[15] = addr
& 0xfffffffe;
8498 env
->thumb
= addr
& 1;
8501 static void v7m_update_fpccr(CPUARMState
*env
, uint32_t frameptr
,
8505 * Like the pseudocode UpdateFPCCR: save state in FPCAR and FPCCR
8506 * that we will need later in order to do lazy FP reg stacking.
8508 bool is_secure
= env
->v7m
.secure
;
8509 void *nvic
= env
->nvic
;
8511 * Some bits are unbanked and live always in fpccr[M_REG_S]; some bits
8512 * are banked and we want to update the bit in the bank for the
8513 * current security state; and in one case we want to specifically
8514 * update the NS banked version of a bit even if we are secure.
8516 uint32_t *fpccr_s
= &env
->v7m
.fpccr
[M_REG_S
];
8517 uint32_t *fpccr_ns
= &env
->v7m
.fpccr
[M_REG_NS
];
8518 uint32_t *fpccr
= &env
->v7m
.fpccr
[is_secure
];
8519 bool hfrdy
, bfrdy
, mmrdy
, ns_ufrdy
, s_ufrdy
, sfrdy
, monrdy
;
8521 env
->v7m
.fpcar
[is_secure
] = frameptr
& ~0x7;
8523 if (apply_splim
&& arm_feature(env
, ARM_FEATURE_V8
)) {
8525 uint32_t splim
= v7m_sp_limit(env
);
8526 bool ign
= armv7m_nvic_neg_prio_requested(nvic
, is_secure
) &&
8527 (env
->v7m
.ccr
[is_secure
] & R_V7M_CCR_STKOFHFNMIGN_MASK
);
8529 splimviol
= !ign
&& frameptr
< splim
;
8530 *fpccr
= FIELD_DP32(*fpccr
, V7M_FPCCR
, SPLIMVIOL
, splimviol
);
8533 *fpccr
= FIELD_DP32(*fpccr
, V7M_FPCCR
, LSPACT
, 1);
8535 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, S
, is_secure
);
8537 *fpccr
= FIELD_DP32(*fpccr
, V7M_FPCCR
, USER
, arm_current_el(env
) == 0);
8539 *fpccr
= FIELD_DP32(*fpccr
, V7M_FPCCR
, THREAD
,
8540 !arm_v7m_is_handler_mode(env
));
8542 hfrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_HARD
, false);
8543 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, HFRDY
, hfrdy
);
8545 bfrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_BUS
, false);
8546 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, BFRDY
, bfrdy
);
8548 mmrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_MEM
, is_secure
);
8549 *fpccr
= FIELD_DP32(*fpccr
, V7M_FPCCR
, MMRDY
, mmrdy
);
8551 ns_ufrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_USAGE
, false);
8552 *fpccr_ns
= FIELD_DP32(*fpccr_ns
, V7M_FPCCR
, UFRDY
, ns_ufrdy
);
8554 monrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_DEBUG
, false);
8555 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, MONRDY
, monrdy
);
8557 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8558 s_ufrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_USAGE
, true);
8559 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, UFRDY
, s_ufrdy
);
8561 sfrdy
= armv7m_nvic_get_ready_status(nvic
, ARMV7M_EXCP_SECURE
, false);
8562 *fpccr_s
= FIELD_DP32(*fpccr_s
, V7M_FPCCR
, SFRDY
, sfrdy
);
8566 void HELPER(v7m_vlstm
)(CPUARMState
*env
, uint32_t fptr
)
8568 /* fptr is the value of Rn, the frame pointer we store the FP regs to */
8569 bool s
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_S_MASK
;
8570 bool lspact
= env
->v7m
.fpccr
[s
] & R_V7M_FPCCR_LSPACT_MASK
;
8572 assert(env
->v7m
.secure
);
8574 if (!(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
)) {
8578 /* Check access to the coprocessor is permitted */
8579 if (!v7m_cpacr_pass(env
, true, arm_current_el(env
) != 0)) {
8580 raise_exception_ra(env
, EXCP_NOCP
, 0, 1, GETPC());
8584 /* LSPACT should not be active when there is active FP state */
8585 raise_exception_ra(env
, EXCP_LSERR
, 0, 1, GETPC());
8589 raise_exception_ra(env
, EXCP_UNALIGNED
, 0, 1, GETPC());
8593 * Note that we do not use v7m_stack_write() here, because the
8594 * accesses should not set the FSR bits for stacking errors if they
8595 * fail. (In pseudocode terms, they are AccType_NORMAL, not AccType_STACK
8596 * or AccType_LAZYFP). Faults in cpu_stl_data() will throw exceptions
8599 if (!(env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_LSPEN_MASK
)) {
8600 bool ts
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_TS_MASK
;
8603 for (i
= 0; i
< (ts
? 32 : 16); i
+= 2) {
8604 uint64_t dn
= *aa32_vfp_dreg(env
, i
/ 2);
8605 uint32_t faddr
= fptr
+ 4 * i
;
8606 uint32_t slo
= extract64(dn
, 0, 32);
8607 uint32_t shi
= extract64(dn
, 32, 32);
8610 faddr
+= 8; /* skip the slot for the FPSCR */
8612 cpu_stl_data(env
, faddr
, slo
);
8613 cpu_stl_data(env
, faddr
+ 4, shi
);
8615 cpu_stl_data(env
, fptr
+ 0x40, vfp_get_fpscr(env
));
8618 * If TS is 0 then s0 to s15 and FPSCR are UNKNOWN; we choose to
8619 * leave them unchanged, matching our choice in v7m_preserve_fp_state.
8622 for (i
= 0; i
< 32; i
+= 2) {
8623 *aa32_vfp_dreg(env
, i
/ 2) = 0;
8625 vfp_set_fpscr(env
, 0);
8628 v7m_update_fpccr(env
, fptr
, false);
8631 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_FPCA_MASK
;
8634 void HELPER(v7m_vlldm
)(CPUARMState
*env
, uint32_t fptr
)
8636 /* fptr is the value of Rn, the frame pointer we load the FP regs from */
8637 assert(env
->v7m
.secure
);
8639 if (!(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
)) {
8643 /* Check access to the coprocessor is permitted */
8644 if (!v7m_cpacr_pass(env
, true, arm_current_el(env
) != 0)) {
8645 raise_exception_ra(env
, EXCP_NOCP
, 0, 1, GETPC());
8648 if (env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_LSPACT_MASK
) {
8649 /* State in FP is still valid */
8650 env
->v7m
.fpccr
[M_REG_S
] &= ~R_V7M_FPCCR_LSPACT_MASK
;
8652 bool ts
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_TS_MASK
;
8657 raise_exception_ra(env
, EXCP_UNALIGNED
, 0, 1, GETPC());
8660 for (i
= 0; i
< (ts
? 32 : 16); i
+= 2) {
8663 uint32_t faddr
= fptr
+ 4 * i
;
8666 faddr
+= 8; /* skip the slot for the FPSCR */
8669 slo
= cpu_ldl_data(env
, faddr
);
8670 shi
= cpu_ldl_data(env
, faddr
+ 4);
8672 dn
= (uint64_t) shi
<< 32 | slo
;
8673 *aa32_vfp_dreg(env
, i
/ 2) = dn
;
8675 fpscr
= cpu_ldl_data(env
, fptr
+ 0x40);
8676 vfp_set_fpscr(env
, fpscr
);
8679 env
->v7m
.control
[M_REG_S
] |= R_V7M_CONTROL_FPCA_MASK
;
8682 static bool v7m_push_stack(ARMCPU
*cpu
)
8685 * Do the "set up stack frame" part of exception entry,
8686 * similar to pseudocode PushStack().
8687 * Return true if we generate a derived exception (and so
8688 * should ignore further stack faults trying to process
8689 * that derived exception.)
8691 bool stacked_ok
= true, limitviol
= false;
8692 CPUARMState
*env
= &cpu
->env
;
8693 uint32_t xpsr
= xpsr_read(env
);
8694 uint32_t frameptr
= env
->regs
[13];
8695 ARMMMUIdx mmu_idx
= arm_mmu_idx(env
);
8697 bool nsacr_cp10
= extract32(env
->v7m
.nsacr
, 10, 1);
8699 if ((env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
) &&
8700 (env
->v7m
.secure
|| nsacr_cp10
)) {
8701 if (env
->v7m
.secure
&&
8702 env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_TS_MASK
) {
8711 /* Align stack pointer if the guest wants that */
8712 if ((frameptr
& 4) &&
8713 (env
->v7m
.ccr
[env
->v7m
.secure
] & R_V7M_CCR_STKALIGN_MASK
)) {
8715 xpsr
|= XPSR_SPREALIGN
;
8719 if (env
->v7m
.secure
&&
8720 (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
)) {
8724 frameptr
-= framesize
;
8726 if (arm_feature(env
, ARM_FEATURE_V8
)) {
8727 uint32_t limit
= v7m_sp_limit(env
);
8729 if (frameptr
< limit
) {
8731 * Stack limit failure: set SP to the limit value, and generate
8732 * STKOF UsageFault. Stack pushes below the limit must not be
8733 * performed. It is IMPDEF whether pushes above the limit are
8734 * performed; we choose not to.
8736 qemu_log_mask(CPU_LOG_INT
,
8737 "...STKOF during stacking\n");
8738 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_STKOF_MASK
;
8739 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
8741 env
->regs
[13] = limit
;
8743 * We won't try to perform any further memory accesses but
8744 * we must continue through the following code to check for
8745 * permission faults during FPU state preservation, and we
8746 * must update FPCCR if lazy stacking is enabled.
8754 * Write as much of the stack frame as we can. If we fail a stack
8755 * write this will result in a derived exception being pended
8756 * (which may be taken in preference to the one we started with
8757 * if it has higher priority).
8759 stacked_ok
= stacked_ok
&&
8760 v7m_stack_write(cpu
, frameptr
, env
->regs
[0], mmu_idx
, STACK_NORMAL
) &&
8761 v7m_stack_write(cpu
, frameptr
+ 4, env
->regs
[1],
8762 mmu_idx
, STACK_NORMAL
) &&
8763 v7m_stack_write(cpu
, frameptr
+ 8, env
->regs
[2],
8764 mmu_idx
, STACK_NORMAL
) &&
8765 v7m_stack_write(cpu
, frameptr
+ 12, env
->regs
[3],
8766 mmu_idx
, STACK_NORMAL
) &&
8767 v7m_stack_write(cpu
, frameptr
+ 16, env
->regs
[12],
8768 mmu_idx
, STACK_NORMAL
) &&
8769 v7m_stack_write(cpu
, frameptr
+ 20, env
->regs
[14],
8770 mmu_idx
, STACK_NORMAL
) &&
8771 v7m_stack_write(cpu
, frameptr
+ 24, env
->regs
[15],
8772 mmu_idx
, STACK_NORMAL
) &&
8773 v7m_stack_write(cpu
, frameptr
+ 28, xpsr
, mmu_idx
, STACK_NORMAL
);
8775 if (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
) {
8776 /* FPU is active, try to save its registers */
8777 bool fpccr_s
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_S_MASK
;
8778 bool lspact
= env
->v7m
.fpccr
[fpccr_s
] & R_V7M_FPCCR_LSPACT_MASK
;
8780 if (lspact
&& arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8781 qemu_log_mask(CPU_LOG_INT
,
8782 "...SecureFault because LSPACT and FPCA both set\n");
8783 env
->v7m
.sfsr
|= R_V7M_SFSR_LSERR_MASK
;
8784 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
8785 } else if (!env
->v7m
.secure
&& !nsacr_cp10
) {
8786 qemu_log_mask(CPU_LOG_INT
,
8787 "...Secure UsageFault with CFSR.NOCP because "
8788 "NSACR.CP10 prevents stacking FP regs\n");
8789 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, M_REG_S
);
8790 env
->v7m
.cfsr
[M_REG_S
] |= R_V7M_CFSR_NOCP_MASK
;
8792 if (!(env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_LSPEN_MASK
)) {
8793 /* Lazy stacking disabled, save registers now */
8795 bool cpacr_pass
= v7m_cpacr_pass(env
, env
->v7m
.secure
,
8796 arm_current_el(env
) != 0);
8798 if (stacked_ok
&& !cpacr_pass
) {
8800 * Take UsageFault if CPACR forbids access. The pseudocode
8801 * here does a full CheckCPEnabled() but we know the NSACR
8802 * check can never fail as we have already handled that.
8804 qemu_log_mask(CPU_LOG_INT
,
8805 "...UsageFault with CFSR.NOCP because "
8806 "CPACR.CP10 prevents stacking FP regs\n");
8807 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
8809 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_NOCP_MASK
;
8813 for (i
= 0; i
< ((framesize
== 0xa8) ? 32 : 16); i
+= 2) {
8814 uint64_t dn
= *aa32_vfp_dreg(env
, i
/ 2);
8815 uint32_t faddr
= frameptr
+ 0x20 + 4 * i
;
8816 uint32_t slo
= extract64(dn
, 0, 32);
8817 uint32_t shi
= extract64(dn
, 32, 32);
8820 faddr
+= 8; /* skip the slot for the FPSCR */
8822 stacked_ok
= stacked_ok
&&
8823 v7m_stack_write(cpu
, faddr
, slo
,
8824 mmu_idx
, STACK_NORMAL
) &&
8825 v7m_stack_write(cpu
, faddr
+ 4, shi
,
8826 mmu_idx
, STACK_NORMAL
);
8828 stacked_ok
= stacked_ok
&&
8829 v7m_stack_write(cpu
, frameptr
+ 0x60,
8830 vfp_get_fpscr(env
), mmu_idx
, STACK_NORMAL
);
8832 for (i
= 0; i
< ((framesize
== 0xa8) ? 32 : 16); i
+= 2) {
8833 *aa32_vfp_dreg(env
, i
/ 2) = 0;
8835 vfp_set_fpscr(env
, 0);
8838 /* Lazy stacking enabled, save necessary info to stack later */
8839 v7m_update_fpccr(env
, frameptr
+ 0x20, true);
8845 * If we broke a stack limit then SP was already updated earlier;
8846 * otherwise we update SP regardless of whether any of the stack
8847 * accesses failed or we took some other kind of fault.
8850 env
->regs
[13] = frameptr
;
8856 static void do_v7m_exception_exit(ARMCPU
*cpu
)
8858 CPUARMState
*env
= &cpu
->env
;
8860 uint32_t xpsr
, xpsr_mask
;
8861 bool ufault
= false;
8862 bool sfault
= false;
8863 bool return_to_sp_process
;
8864 bool return_to_handler
;
8865 bool rettobase
= false;
8866 bool exc_secure
= false;
8867 bool return_to_secure
;
8869 bool restore_s16_s31
;
8872 * If we're not in Handler mode then jumps to magic exception-exit
8873 * addresses don't have magic behaviour. However for the v8M
8874 * security extensions the magic secure-function-return has to
8875 * work in thread mode too, so to avoid doing an extra check in
8876 * the generated code we allow exception-exit magic to also cause the
8877 * internal exception and bring us here in thread mode. Correct code
8878 * will never try to do this (the following insn fetch will always
8879 * fault) so we the overhead of having taken an unnecessary exception
8882 if (!arm_v7m_is_handler_mode(env
)) {
8887 * In the spec pseudocode ExceptionReturn() is called directly
8888 * from BXWritePC() and gets the full target PC value including
8889 * bit zero. In QEMU's implementation we treat it as a normal
8890 * jump-to-register (which is then caught later on), and so split
8891 * the target value up between env->regs[15] and env->thumb in
8892 * gen_bx(). Reconstitute it.
8894 excret
= env
->regs
[15];
8899 qemu_log_mask(CPU_LOG_INT
, "Exception return: magic PC %" PRIx32
8900 " previous exception %d\n",
8901 excret
, env
->v7m
.exception
);
8903 if ((excret
& R_V7M_EXCRET_RES1_MASK
) != R_V7M_EXCRET_RES1_MASK
) {
8904 qemu_log_mask(LOG_GUEST_ERROR
, "M profile: zero high bits in exception "
8905 "exit PC value 0x%" PRIx32
" are UNPREDICTABLE\n",
8909 ftype
= excret
& R_V7M_EXCRET_FTYPE_MASK
;
8911 if (!arm_feature(env
, ARM_FEATURE_VFP
) && !ftype
) {
8912 qemu_log_mask(LOG_GUEST_ERROR
, "M profile: zero FTYPE in exception "
8913 "exit PC value 0x%" PRIx32
" is UNPREDICTABLE "
8914 "if FPU not present\n",
8919 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8921 * EXC_RETURN.ES validation check (R_SMFL). We must do this before
8922 * we pick which FAULTMASK to clear.
8924 if (!env
->v7m
.secure
&&
8925 ((excret
& R_V7M_EXCRET_ES_MASK
) ||
8926 !(excret
& R_V7M_EXCRET_DCRS_MASK
))) {
8928 /* For all other purposes, treat ES as 0 (R_HXSR) */
8929 excret
&= ~R_V7M_EXCRET_ES_MASK
;
8931 exc_secure
= excret
& R_V7M_EXCRET_ES_MASK
;
8934 if (env
->v7m
.exception
!= ARMV7M_EXCP_NMI
) {
8936 * Auto-clear FAULTMASK on return from other than NMI.
8937 * If the security extension is implemented then this only
8938 * happens if the raw execution priority is >= 0; the
8939 * value of the ES bit in the exception return value indicates
8940 * which security state's faultmask to clear. (v8M ARM ARM R_KBNF.)
8942 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8943 if (armv7m_nvic_raw_execution_priority(env
->nvic
) >= 0) {
8944 env
->v7m
.faultmask
[exc_secure
] = 0;
8947 env
->v7m
.faultmask
[M_REG_NS
] = 0;
8951 switch (armv7m_nvic_complete_irq(env
->nvic
, env
->v7m
.exception
,
8954 /* attempt to exit an exception that isn't active */
8958 /* still an irq active now */
8962 * We returned to base exception level, no nesting.
8963 * (In the pseudocode this is written using "NestedActivation != 1"
8964 * where we have 'rettobase == false'.)
8969 g_assert_not_reached();
8972 return_to_handler
= !(excret
& R_V7M_EXCRET_MODE_MASK
);
8973 return_to_sp_process
= excret
& R_V7M_EXCRET_SPSEL_MASK
;
8974 return_to_secure
= arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
8975 (excret
& R_V7M_EXCRET_S_MASK
);
8977 if (arm_feature(env
, ARM_FEATURE_V8
)) {
8978 if (!arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
8980 * UNPREDICTABLE if S == 1 or DCRS == 0 or ES == 1 (R_XLCP);
8981 * we choose to take the UsageFault.
8983 if ((excret
& R_V7M_EXCRET_S_MASK
) ||
8984 (excret
& R_V7M_EXCRET_ES_MASK
) ||
8985 !(excret
& R_V7M_EXCRET_DCRS_MASK
)) {
8989 if (excret
& R_V7M_EXCRET_RES0_MASK
) {
8993 /* For v7M we only recognize certain combinations of the low bits */
8994 switch (excret
& 0xf) {
8995 case 1: /* Return to Handler */
8997 case 13: /* Return to Thread using Process stack */
8998 case 9: /* Return to Thread using Main stack */
9000 * We only need to check NONBASETHRDENA for v7M, because in
9001 * v8M this bit does not exist (it is RES1).
9004 !(env
->v7m
.ccr
[env
->v7m
.secure
] &
9005 R_V7M_CCR_NONBASETHRDENA_MASK
)) {
9015 * Set CONTROL.SPSEL from excret.SPSEL. Since we're still in
9016 * Handler mode (and will be until we write the new XPSR.Interrupt
9017 * field) this does not switch around the current stack pointer.
9018 * We must do this before we do any kind of tailchaining, including
9019 * for the derived exceptions on integrity check failures, or we will
9020 * give the guest an incorrect EXCRET.SPSEL value on exception entry.
9022 write_v7m_control_spsel_for_secstate(env
, return_to_sp_process
, exc_secure
);
9025 * Clear scratch FP values left in caller saved registers; this
9026 * must happen before any kind of tail chaining.
9028 if ((env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_CLRONRET_MASK
) &&
9029 (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
)) {
9030 if (env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_LSPACT_MASK
) {
9031 env
->v7m
.sfsr
|= R_V7M_SFSR_LSERR_MASK
;
9032 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9033 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
9034 "stackframe: error during lazy state deactivation\n");
9035 v7m_exception_taken(cpu
, excret
, true, false);
9038 /* Clear s0..s15 and FPSCR */
9041 for (i
= 0; i
< 16; i
+= 2) {
9042 *aa32_vfp_dreg(env
, i
/ 2) = 0;
9044 vfp_set_fpscr(env
, 0);
9049 env
->v7m
.sfsr
|= R_V7M_SFSR_INVER_MASK
;
9050 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9051 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
9052 "stackframe: failed EXC_RETURN.ES validity check\n");
9053 v7m_exception_taken(cpu
, excret
, true, false);
9059 * Bad exception return: instead of popping the exception
9060 * stack, directly take a usage fault on the current stack.
9062 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
9063 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
9064 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
9065 "stackframe: failed exception return integrity check\n");
9066 v7m_exception_taken(cpu
, excret
, true, false);
9071 * Tailchaining: if there is currently a pending exception that
9072 * is high enough priority to preempt execution at the level we're
9073 * about to return to, then just directly take that exception now,
9074 * avoiding an unstack-and-then-stack. Note that now we have
9075 * deactivated the previous exception by calling armv7m_nvic_complete_irq()
9076 * our current execution priority is already the execution priority we are
9077 * returning to -- none of the state we would unstack or set based on
9078 * the EXCRET value affects it.
9080 if (armv7m_nvic_can_take_pending_exception(env
->nvic
)) {
9081 qemu_log_mask(CPU_LOG_INT
, "...tailchaining to pending exception\n");
9082 v7m_exception_taken(cpu
, excret
, true, false);
9086 switch_v7m_security_state(env
, return_to_secure
);
9090 * The stack pointer we should be reading the exception frame from
9091 * depends on bits in the magic exception return type value (and
9092 * for v8M isn't necessarily the stack pointer we will eventually
9093 * end up resuming execution with). Get a pointer to the location
9094 * in the CPU state struct where the SP we need is currently being
9095 * stored; we will use and modify it in place.
9096 * We use this limited C variable scope so we don't accidentally
9097 * use 'frame_sp_p' after we do something that makes it invalid.
9099 uint32_t *frame_sp_p
= get_v7m_sp_ptr(env
,
9102 return_to_sp_process
);
9103 uint32_t frameptr
= *frame_sp_p
;
9106 bool return_to_priv
= return_to_handler
||
9107 !(env
->v7m
.control
[return_to_secure
] & R_V7M_CONTROL_NPRIV_MASK
);
9109 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, return_to_secure
,
9112 if (!QEMU_IS_ALIGNED(frameptr
, 8) &&
9113 arm_feature(env
, ARM_FEATURE_V8
)) {
9114 qemu_log_mask(LOG_GUEST_ERROR
,
9115 "M profile exception return with non-8-aligned SP "
9116 "for destination state is UNPREDICTABLE\n");
9119 /* Do we need to pop callee-saved registers? */
9120 if (return_to_secure
&&
9121 ((excret
& R_V7M_EXCRET_ES_MASK
) == 0 ||
9122 (excret
& R_V7M_EXCRET_DCRS_MASK
) == 0)) {
9123 uint32_t actual_sig
;
9125 pop_ok
= v7m_stack_read(cpu
, &actual_sig
, frameptr
, mmu_idx
);
9127 if (pop_ok
&& v7m_integrity_sig(env
, excret
) != actual_sig
) {
9128 /* Take a SecureFault on the current stack */
9129 env
->v7m
.sfsr
|= R_V7M_SFSR_INVIS_MASK
;
9130 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9131 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
9132 "stackframe: failed exception return integrity "
9133 "signature check\n");
9134 v7m_exception_taken(cpu
, excret
, true, false);
9139 v7m_stack_read(cpu
, &env
->regs
[4], frameptr
+ 0x8, mmu_idx
) &&
9140 v7m_stack_read(cpu
, &env
->regs
[5], frameptr
+ 0xc, mmu_idx
) &&
9141 v7m_stack_read(cpu
, &env
->regs
[6], frameptr
+ 0x10, mmu_idx
) &&
9142 v7m_stack_read(cpu
, &env
->regs
[7], frameptr
+ 0x14, mmu_idx
) &&
9143 v7m_stack_read(cpu
, &env
->regs
[8], frameptr
+ 0x18, mmu_idx
) &&
9144 v7m_stack_read(cpu
, &env
->regs
[9], frameptr
+ 0x1c, mmu_idx
) &&
9145 v7m_stack_read(cpu
, &env
->regs
[10], frameptr
+ 0x20, mmu_idx
) &&
9146 v7m_stack_read(cpu
, &env
->regs
[11], frameptr
+ 0x24, mmu_idx
);
9153 v7m_stack_read(cpu
, &env
->regs
[0], frameptr
, mmu_idx
) &&
9154 v7m_stack_read(cpu
, &env
->regs
[1], frameptr
+ 0x4, mmu_idx
) &&
9155 v7m_stack_read(cpu
, &env
->regs
[2], frameptr
+ 0x8, mmu_idx
) &&
9156 v7m_stack_read(cpu
, &env
->regs
[3], frameptr
+ 0xc, mmu_idx
) &&
9157 v7m_stack_read(cpu
, &env
->regs
[12], frameptr
+ 0x10, mmu_idx
) &&
9158 v7m_stack_read(cpu
, &env
->regs
[14], frameptr
+ 0x14, mmu_idx
) &&
9159 v7m_stack_read(cpu
, &env
->regs
[15], frameptr
+ 0x18, mmu_idx
) &&
9160 v7m_stack_read(cpu
, &xpsr
, frameptr
+ 0x1c, mmu_idx
);
9164 * v7m_stack_read() pended a fault, so take it (as a tail
9165 * chained exception on the same stack frame)
9167 qemu_log_mask(CPU_LOG_INT
, "...derived exception on unstacking\n");
9168 v7m_exception_taken(cpu
, excret
, true, false);
9173 * Returning from an exception with a PC with bit 0 set is defined
9174 * behaviour on v8M (bit 0 is ignored), but for v7M it was specified
9175 * to be UNPREDICTABLE. In practice actual v7M hardware seems to ignore
9176 * the lsbit, and there are several RTOSes out there which incorrectly
9177 * assume the r15 in the stack frame should be a Thumb-style "lsbit
9178 * indicates ARM/Thumb" value, so ignore the bit on v7M as well, but
9179 * complain about the badly behaved guest.
9181 if (env
->regs
[15] & 1) {
9182 env
->regs
[15] &= ~1U;
9183 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
9184 qemu_log_mask(LOG_GUEST_ERROR
,
9185 "M profile return from interrupt with misaligned "
9186 "PC is UNPREDICTABLE on v7M\n");
9190 if (arm_feature(env
, ARM_FEATURE_V8
)) {
9192 * For v8M we have to check whether the xPSR exception field
9193 * matches the EXCRET value for return to handler/thread
9194 * before we commit to changing the SP and xPSR.
9196 bool will_be_handler
= (xpsr
& XPSR_EXCP
) != 0;
9197 if (return_to_handler
!= will_be_handler
) {
9199 * Take an INVPC UsageFault on the current stack.
9200 * By this point we will have switched to the security state
9201 * for the background state, so this UsageFault will target
9204 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
9206 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
9207 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
9208 "stackframe: failed exception return integrity "
9210 v7m_exception_taken(cpu
, excret
, true, false);
9216 /* FP present and we need to handle it */
9217 if (!return_to_secure
&&
9218 (env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_LSPACT_MASK
)) {
9219 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9220 env
->v7m
.sfsr
|= R_V7M_SFSR_LSERR_MASK
;
9221 qemu_log_mask(CPU_LOG_INT
,
9222 "...taking SecureFault on existing stackframe: "
9223 "Secure LSPACT set but exception return is "
9224 "not to secure state\n");
9225 v7m_exception_taken(cpu
, excret
, true, false);
9229 restore_s16_s31
= return_to_secure
&&
9230 (env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_TS_MASK
);
9232 if (env
->v7m
.fpccr
[return_to_secure
] & R_V7M_FPCCR_LSPACT_MASK
) {
9233 /* State in FPU is still valid, just clear LSPACT */
9234 env
->v7m
.fpccr
[return_to_secure
] &= ~R_V7M_FPCCR_LSPACT_MASK
;
9238 bool cpacr_pass
, nsacr_pass
;
9240 cpacr_pass
= v7m_cpacr_pass(env
, return_to_secure
,
9242 nsacr_pass
= return_to_secure
||
9243 extract32(env
->v7m
.nsacr
, 10, 1);
9246 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
9248 env
->v7m
.cfsr
[return_to_secure
] |= R_V7M_CFSR_NOCP_MASK
;
9249 qemu_log_mask(CPU_LOG_INT
,
9250 "...taking UsageFault on existing "
9251 "stackframe: CPACR.CP10 prevents unstacking "
9253 v7m_exception_taken(cpu
, excret
, true, false);
9255 } else if (!nsacr_pass
) {
9256 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, true);
9257 env
->v7m
.cfsr
[M_REG_S
] |= R_V7M_CFSR_INVPC_MASK
;
9258 qemu_log_mask(CPU_LOG_INT
,
9259 "...taking Secure UsageFault on existing "
9260 "stackframe: NSACR.CP10 prevents unstacking "
9262 v7m_exception_taken(cpu
, excret
, true, false);
9266 for (i
= 0; i
< (restore_s16_s31
? 32 : 16); i
+= 2) {
9269 uint32_t faddr
= frameptr
+ 0x20 + 4 * i
;
9272 faddr
+= 8; /* Skip the slot for the FPSCR */
9276 v7m_stack_read(cpu
, &slo
, faddr
, mmu_idx
) &&
9277 v7m_stack_read(cpu
, &shi
, faddr
+ 4, mmu_idx
);
9283 dn
= (uint64_t)shi
<< 32 | slo
;
9284 *aa32_vfp_dreg(env
, i
/ 2) = dn
;
9287 v7m_stack_read(cpu
, &fpscr
, frameptr
+ 0x60, mmu_idx
);
9289 vfp_set_fpscr(env
, fpscr
);
9293 * These regs are 0 if security extension present;
9294 * otherwise merely UNKNOWN. We zero always.
9296 for (i
= 0; i
< (restore_s16_s31
? 32 : 16); i
+= 2) {
9297 *aa32_vfp_dreg(env
, i
/ 2) = 0;
9299 vfp_set_fpscr(env
, 0);
9303 env
->v7m
.control
[M_REG_S
] = FIELD_DP32(env
->v7m
.control
[M_REG_S
],
9304 V7M_CONTROL
, FPCA
, !ftype
);
9306 /* Commit to consuming the stack frame */
9310 if (restore_s16_s31
) {
9315 * Undo stack alignment (the SPREALIGN bit indicates that the original
9316 * pre-exception SP was not 8-aligned and we added a padding word to
9317 * align it, so we undo this by ORing in the bit that increases it
9318 * from the current 8-aligned value to the 8-unaligned value. (Adding 4
9319 * would work too but a logical OR is how the pseudocode specifies it.)
9321 if (xpsr
& XPSR_SPREALIGN
) {
9324 *frame_sp_p
= frameptr
;
9327 xpsr_mask
= ~(XPSR_SPREALIGN
| XPSR_SFPA
);
9328 if (!arm_feature(env
, ARM_FEATURE_THUMB_DSP
)) {
9329 xpsr_mask
&= ~XPSR_GE
;
9331 /* This xpsr_write() will invalidate frame_sp_p as it may switch stack */
9332 xpsr_write(env
, xpsr
, xpsr_mask
);
9334 if (env
->v7m
.secure
) {
9335 bool sfpa
= xpsr
& XPSR_SFPA
;
9337 env
->v7m
.control
[M_REG_S
] = FIELD_DP32(env
->v7m
.control
[M_REG_S
],
9338 V7M_CONTROL
, SFPA
, sfpa
);
9342 * The restored xPSR exception field will be zero if we're
9343 * resuming in Thread mode. If that doesn't match what the
9344 * exception return excret specified then this is a UsageFault.
9345 * v7M requires we make this check here; v8M did it earlier.
9347 if (return_to_handler
!= arm_v7m_is_handler_mode(env
)) {
9349 * Take an INVPC UsageFault by pushing the stack again;
9350 * we know we're v7M so this is never a Secure UsageFault.
9352 bool ignore_stackfaults
;
9354 assert(!arm_feature(env
, ARM_FEATURE_V8
));
9355 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, false);
9356 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
9357 ignore_stackfaults
= v7m_push_stack(cpu
);
9358 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on new stackframe: "
9359 "failed exception return integrity check\n");
9360 v7m_exception_taken(cpu
, excret
, false, ignore_stackfaults
);
9364 /* Otherwise, we have a successful exception exit. */
9365 arm_clear_exclusive(env
);
9366 qemu_log_mask(CPU_LOG_INT
, "...successful exception return\n");
9369 static bool do_v7m_function_return(ARMCPU
*cpu
)
9372 * v8M security extensions magic function return.
9374 * (1) throw an exception (longjump)
9375 * (2) return true if we successfully handled the function return
9376 * (3) return false if we failed a consistency check and have
9377 * pended a UsageFault that needs to be taken now
9379 * At this point the magic return value is split between env->regs[15]
9380 * and env->thumb. We don't bother to reconstitute it because we don't
9381 * need it (all values are handled the same way).
9383 CPUARMState
*env
= &cpu
->env
;
9384 uint32_t newpc
, newpsr
, newpsr_exc
;
9386 qemu_log_mask(CPU_LOG_INT
, "...really v7M secure function return\n");
9389 bool threadmode
, spsel
;
9392 uint32_t *frame_sp_p
;
9395 /* Pull the return address and IPSR from the Secure stack */
9396 threadmode
= !arm_v7m_is_handler_mode(env
);
9397 spsel
= env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SPSEL_MASK
;
9399 frame_sp_p
= get_v7m_sp_ptr(env
, true, threadmode
, spsel
);
9400 frameptr
= *frame_sp_p
;
9403 * These loads may throw an exception (for MPU faults). We want to
9404 * do them as secure, so work out what MMU index that is.
9406 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
9407 oi
= make_memop_idx(MO_LE
, arm_to_core_mmu_idx(mmu_idx
));
9408 newpc
= helper_le_ldul_mmu(env
, frameptr
, oi
, 0);
9409 newpsr
= helper_le_ldul_mmu(env
, frameptr
+ 4, oi
, 0);
9411 /* Consistency checks on new IPSR */
9412 newpsr_exc
= newpsr
& XPSR_EXCP
;
9413 if (!((env
->v7m
.exception
== 0 && newpsr_exc
== 0) ||
9414 (env
->v7m
.exception
== 1 && newpsr_exc
!= 0))) {
9415 /* Pend the fault and tell our caller to take it */
9416 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
9417 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
9419 qemu_log_mask(CPU_LOG_INT
,
9420 "...taking INVPC UsageFault: "
9421 "IPSR consistency check failed\n");
9425 *frame_sp_p
= frameptr
+ 8;
9428 /* This invalidates frame_sp_p */
9429 switch_v7m_security_state(env
, true);
9430 env
->v7m
.exception
= newpsr_exc
;
9431 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
9432 if (newpsr
& XPSR_SFPA
) {
9433 env
->v7m
.control
[M_REG_S
] |= R_V7M_CONTROL_SFPA_MASK
;
9435 xpsr_write(env
, 0, XPSR_IT
);
9436 env
->thumb
= newpc
& 1;
9437 env
->regs
[15] = newpc
& ~1;
9439 qemu_log_mask(CPU_LOG_INT
, "...function return successful\n");
9443 static bool v7m_read_half_insn(ARMCPU
*cpu
, ARMMMUIdx mmu_idx
,
9444 uint32_t addr
, uint16_t *insn
)
9447 * Load a 16-bit portion of a v7M instruction, returning true on success,
9448 * or false on failure (in which case we will have pended the appropriate
9450 * We need to do the instruction fetch's MPU and SAU checks
9451 * like this because there is no MMU index that would allow
9452 * doing the load with a single function call. Instead we must
9453 * first check that the security attributes permit the load
9454 * and that they don't mismatch on the two halves of the instruction,
9455 * and then we do the load as a secure load (ie using the security
9456 * attributes of the address, not the CPU, as architecturally required).
9458 CPUState
*cs
= CPU(cpu
);
9459 CPUARMState
*env
= &cpu
->env
;
9460 V8M_SAttributes sattrs
= {};
9461 MemTxAttrs attrs
= {};
9462 ARMMMUFaultInfo fi
= {};
9464 target_ulong page_size
;
9468 v8m_security_lookup(env
, addr
, MMU_INST_FETCH
, mmu_idx
, &sattrs
);
9469 if (!sattrs
.nsc
|| sattrs
.ns
) {
9471 * This must be the second half of the insn, and it straddles a
9472 * region boundary with the second half not being S&NSC.
9474 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
9475 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9476 qemu_log_mask(CPU_LOG_INT
,
9477 "...really SecureFault with SFSR.INVEP\n");
9480 if (get_phys_addr(env
, addr
, MMU_INST_FETCH
, mmu_idx
,
9481 &physaddr
, &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
9482 /* the MPU lookup failed */
9483 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
9484 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
, env
->v7m
.secure
);
9485 qemu_log_mask(CPU_LOG_INT
, "...really MemManage with CFSR.IACCVIOL\n");
9488 *insn
= address_space_lduw_le(arm_addressspace(cs
, attrs
), physaddr
,
9490 if (txres
!= MEMTX_OK
) {
9491 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
9492 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
9493 qemu_log_mask(CPU_LOG_INT
, "...really BusFault with CFSR.IBUSERR\n");
9499 static bool v7m_handle_execute_nsc(ARMCPU
*cpu
)
9502 * Check whether this attempt to execute code in a Secure & NS-Callable
9503 * memory region is for an SG instruction; if so, then emulate the
9504 * effect of the SG instruction and return true. Otherwise pend
9505 * the correct kind of exception and return false.
9507 CPUARMState
*env
= &cpu
->env
;
9512 * We should never get here unless get_phys_addr_pmsav8() caused
9513 * an exception for NS executing in S&NSC memory.
9515 assert(!env
->v7m
.secure
);
9516 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
9518 /* We want to do the MPU lookup as secure; work out what mmu_idx that is */
9519 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
9521 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15], &insn
)) {
9529 if (insn
!= 0xe97f) {
9531 * Not an SG instruction first half (we choose the IMPDEF
9532 * early-SG-check option).
9537 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15] + 2, &insn
)) {
9541 if (insn
!= 0xe97f) {
9543 * Not an SG instruction second half (yes, both halves of the SG
9544 * insn have the same hex value)
9550 * OK, we have confirmed that we really have an SG instruction.
9551 * We know we're NS in S memory so don't need to repeat those checks.
9553 qemu_log_mask(CPU_LOG_INT
, "...really an SG instruction at 0x%08" PRIx32
9554 ", executing it\n", env
->regs
[15]);
9555 env
->regs
[14] &= ~1;
9556 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
9557 switch_v7m_security_state(env
, true);
9558 xpsr_write(env
, 0, XPSR_IT
);
9563 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
9564 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9565 qemu_log_mask(CPU_LOG_INT
,
9566 "...really SecureFault with SFSR.INVEP\n");
9570 void arm_v7m_cpu_do_interrupt(CPUState
*cs
)
9572 ARMCPU
*cpu
= ARM_CPU(cs
);
9573 CPUARMState
*env
= &cpu
->env
;
9575 bool ignore_stackfaults
;
9577 arm_log_exception(cs
->exception_index
);
9580 * For exceptions we just mark as pending on the NVIC, and let that
9583 switch (cs
->exception_index
) {
9585 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
9586 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_UNDEFINSTR_MASK
;
9591 * NOCP might be directed to something other than the current
9592 * security state if this fault is because of NSACR; we indicate
9593 * the target security state using exception.target_el.
9595 int target_secstate
;
9597 if (env
->exception
.target_el
== 3) {
9598 target_secstate
= M_REG_S
;
9600 target_secstate
= env
->v7m
.secure
;
9602 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, target_secstate
);
9603 env
->v7m
.cfsr
[target_secstate
] |= R_V7M_CFSR_NOCP_MASK
;
9607 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
9608 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVSTATE_MASK
;
9611 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
9612 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_STKOF_MASK
;
9615 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9616 env
->v7m
.sfsr
|= R_V7M_SFSR_LSERR_MASK
;
9618 case EXCP_UNALIGNED
:
9619 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
9620 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_UNALIGNED_MASK
;
9623 /* The PC already points to the next instruction. */
9624 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SVC
, env
->v7m
.secure
);
9626 case EXCP_PREFETCH_ABORT
:
9627 case EXCP_DATA_ABORT
:
9629 * Note that for M profile we don't have a guest facing FSR, but
9630 * the env->exception.fsr will be populated by the code that
9631 * raises the fault, in the A profile short-descriptor format.
9633 switch (env
->exception
.fsr
& 0xf) {
9634 case M_FAKE_FSR_NSC_EXEC
:
9636 * Exception generated when we try to execute code at an address
9637 * which is marked as Secure & Non-Secure Callable and the CPU
9638 * is in the Non-Secure state. The only instruction which can
9639 * be executed like this is SG (and that only if both halves of
9640 * the SG instruction have the same security attributes.)
9641 * Everything else must generate an INVEP SecureFault, so we
9642 * emulate the SG instruction here.
9644 if (v7m_handle_execute_nsc(cpu
)) {
9648 case M_FAKE_FSR_SFAULT
:
9650 * Various flavours of SecureFault for attempts to execute or
9651 * access data in the wrong security state.
9653 switch (cs
->exception_index
) {
9654 case EXCP_PREFETCH_ABORT
:
9655 if (env
->v7m
.secure
) {
9656 env
->v7m
.sfsr
|= R_V7M_SFSR_INVTRAN_MASK
;
9657 qemu_log_mask(CPU_LOG_INT
,
9658 "...really SecureFault with SFSR.INVTRAN\n");
9660 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
9661 qemu_log_mask(CPU_LOG_INT
,
9662 "...really SecureFault with SFSR.INVEP\n");
9665 case EXCP_DATA_ABORT
:
9666 /* This must be an NS access to S memory */
9667 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
;
9668 qemu_log_mask(CPU_LOG_INT
,
9669 "...really SecureFault with SFSR.AUVIOL\n");
9672 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
9674 case 0x8: /* External Abort */
9675 switch (cs
->exception_index
) {
9676 case EXCP_PREFETCH_ABORT
:
9677 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
9678 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IBUSERR\n");
9680 case EXCP_DATA_ABORT
:
9681 env
->v7m
.cfsr
[M_REG_NS
] |=
9682 (R_V7M_CFSR_PRECISERR_MASK
| R_V7M_CFSR_BFARVALID_MASK
);
9683 env
->v7m
.bfar
= env
->exception
.vaddress
;
9684 qemu_log_mask(CPU_LOG_INT
,
9685 "...with CFSR.PRECISERR and BFAR 0x%x\n",
9689 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
9693 * All other FSR values are either MPU faults or "can't happen
9694 * for M profile" cases.
9696 switch (cs
->exception_index
) {
9697 case EXCP_PREFETCH_ABORT
:
9698 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
9699 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IACCVIOL\n");
9701 case EXCP_DATA_ABORT
:
9702 env
->v7m
.cfsr
[env
->v7m
.secure
] |=
9703 (R_V7M_CFSR_DACCVIOL_MASK
| R_V7M_CFSR_MMARVALID_MASK
);
9704 env
->v7m
.mmfar
[env
->v7m
.secure
] = env
->exception
.vaddress
;
9705 qemu_log_mask(CPU_LOG_INT
,
9706 "...with CFSR.DACCVIOL and MMFAR 0x%x\n",
9707 env
->v7m
.mmfar
[env
->v7m
.secure
]);
9710 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
,
9716 if (semihosting_enabled()) {
9718 nr
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
)) & 0xff;
9721 qemu_log_mask(CPU_LOG_INT
,
9722 "...handling as semihosting call 0x%x\n",
9724 env
->regs
[0] = do_arm_semihosting(env
);
9728 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_DEBUG
, false);
9732 case EXCP_EXCEPTION_EXIT
:
9733 if (env
->regs
[15] < EXC_RETURN_MIN_MAGIC
) {
9734 /* Must be v8M security extension function return */
9735 assert(env
->regs
[15] >= FNC_RETURN_MIN_MAGIC
);
9736 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
9737 if (do_v7m_function_return(cpu
)) {
9741 do_v7m_exception_exit(cpu
);
9747 * We already pended the specific exception in the NVIC in the
9748 * v7m_preserve_fp_state() helper function.
9752 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
9753 return; /* Never happens. Keep compiler happy. */
9756 if (arm_feature(env
, ARM_FEATURE_V8
)) {
9757 lr
= R_V7M_EXCRET_RES1_MASK
|
9758 R_V7M_EXCRET_DCRS_MASK
;
9760 * The S bit indicates whether we should return to Secure
9761 * or NonSecure (ie our current state).
9762 * The ES bit indicates whether we're taking this exception
9763 * to Secure or NonSecure (ie our target state). We set it
9764 * later, in v7m_exception_taken().
9765 * The SPSEL bit is also set in v7m_exception_taken() for v8M.
9766 * This corresponds to the ARM ARM pseudocode for v8M setting
9767 * some LR bits in PushStack() and some in ExceptionTaken();
9768 * the distinction matters for the tailchain cases where we
9769 * can take an exception without pushing the stack.
9771 if (env
->v7m
.secure
) {
9772 lr
|= R_V7M_EXCRET_S_MASK
;
9774 if (!(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
)) {
9775 lr
|= R_V7M_EXCRET_FTYPE_MASK
;
9778 lr
= R_V7M_EXCRET_RES1_MASK
|
9779 R_V7M_EXCRET_S_MASK
|
9780 R_V7M_EXCRET_DCRS_MASK
|
9781 R_V7M_EXCRET_FTYPE_MASK
|
9782 R_V7M_EXCRET_ES_MASK
;
9783 if (env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
) {
9784 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
9787 if (!arm_v7m_is_handler_mode(env
)) {
9788 lr
|= R_V7M_EXCRET_MODE_MASK
;
9791 ignore_stackfaults
= v7m_push_stack(cpu
);
9792 v7m_exception_taken(cpu
, lr
, false, ignore_stackfaults
);
9796 * Function used to synchronize QEMU's AArch64 register set with AArch32
9797 * register set. This is necessary when switching between AArch32 and AArch64
9800 void aarch64_sync_32_to_64(CPUARMState
*env
)
9803 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
9805 /* We can blanket copy R[0:7] to X[0:7] */
9806 for (i
= 0; i
< 8; i
++) {
9807 env
->xregs
[i
] = env
->regs
[i
];
9811 * Unless we are in FIQ mode, x8-x12 come from the user registers r8-r12.
9812 * Otherwise, they come from the banked user regs.
9814 if (mode
== ARM_CPU_MODE_FIQ
) {
9815 for (i
= 8; i
< 13; i
++) {
9816 env
->xregs
[i
] = env
->usr_regs
[i
- 8];
9819 for (i
= 8; i
< 13; i
++) {
9820 env
->xregs
[i
] = env
->regs
[i
];
9825 * Registers x13-x23 are the various mode SP and FP registers. Registers
9826 * r13 and r14 are only copied if we are in that mode, otherwise we copy
9827 * from the mode banked register.
9829 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
9830 env
->xregs
[13] = env
->regs
[13];
9831 env
->xregs
[14] = env
->regs
[14];
9833 env
->xregs
[13] = env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)];
9834 /* HYP is an exception in that it is copied from r14 */
9835 if (mode
== ARM_CPU_MODE_HYP
) {
9836 env
->xregs
[14] = env
->regs
[14];
9838 env
->xregs
[14] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_USR
)];
9842 if (mode
== ARM_CPU_MODE_HYP
) {
9843 env
->xregs
[15] = env
->regs
[13];
9845 env
->xregs
[15] = env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)];
9848 if (mode
== ARM_CPU_MODE_IRQ
) {
9849 env
->xregs
[16] = env
->regs
[14];
9850 env
->xregs
[17] = env
->regs
[13];
9852 env
->xregs
[16] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_IRQ
)];
9853 env
->xregs
[17] = env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)];
9856 if (mode
== ARM_CPU_MODE_SVC
) {
9857 env
->xregs
[18] = env
->regs
[14];
9858 env
->xregs
[19] = env
->regs
[13];
9860 env
->xregs
[18] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_SVC
)];
9861 env
->xregs
[19] = env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)];
9864 if (mode
== ARM_CPU_MODE_ABT
) {
9865 env
->xregs
[20] = env
->regs
[14];
9866 env
->xregs
[21] = env
->regs
[13];
9868 env
->xregs
[20] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_ABT
)];
9869 env
->xregs
[21] = env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)];
9872 if (mode
== ARM_CPU_MODE_UND
) {
9873 env
->xregs
[22] = env
->regs
[14];
9874 env
->xregs
[23] = env
->regs
[13];
9876 env
->xregs
[22] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_UND
)];
9877 env
->xregs
[23] = env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)];
9881 * Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
9882 * mode, then we can copy from r8-r14. Otherwise, we copy from the
9883 * FIQ bank for r8-r14.
9885 if (mode
== ARM_CPU_MODE_FIQ
) {
9886 for (i
= 24; i
< 31; i
++) {
9887 env
->xregs
[i
] = env
->regs
[i
- 16]; /* X[24:30] <- R[8:14] */
9890 for (i
= 24; i
< 29; i
++) {
9891 env
->xregs
[i
] = env
->fiq_regs
[i
- 24];
9893 env
->xregs
[29] = env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)];
9894 env
->xregs
[30] = env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_FIQ
)];
9897 env
->pc
= env
->regs
[15];
9901 * Function used to synchronize QEMU's AArch32 register set with AArch64
9902 * register set. This is necessary when switching between AArch32 and AArch64
9905 void aarch64_sync_64_to_32(CPUARMState
*env
)
9908 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
9910 /* We can blanket copy X[0:7] to R[0:7] */
9911 for (i
= 0; i
< 8; i
++) {
9912 env
->regs
[i
] = env
->xregs
[i
];
9916 * Unless we are in FIQ mode, r8-r12 come from the user registers x8-x12.
9917 * Otherwise, we copy x8-x12 into the banked user regs.
9919 if (mode
== ARM_CPU_MODE_FIQ
) {
9920 for (i
= 8; i
< 13; i
++) {
9921 env
->usr_regs
[i
- 8] = env
->xregs
[i
];
9924 for (i
= 8; i
< 13; i
++) {
9925 env
->regs
[i
] = env
->xregs
[i
];
9930 * Registers r13 & r14 depend on the current mode.
9931 * If we are in a given mode, we copy the corresponding x registers to r13
9932 * and r14. Otherwise, we copy the x register to the banked r13 and r14
9935 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
9936 env
->regs
[13] = env
->xregs
[13];
9937 env
->regs
[14] = env
->xregs
[14];
9939 env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[13];
9942 * HYP is an exception in that it does not have its own banked r14 but
9943 * shares the USR r14
9945 if (mode
== ARM_CPU_MODE_HYP
) {
9946 env
->regs
[14] = env
->xregs
[14];
9948 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[14];
9952 if (mode
== ARM_CPU_MODE_HYP
) {
9953 env
->regs
[13] = env
->xregs
[15];
9955 env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)] = env
->xregs
[15];
9958 if (mode
== ARM_CPU_MODE_IRQ
) {
9959 env
->regs
[14] = env
->xregs
[16];
9960 env
->regs
[13] = env
->xregs
[17];
9962 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[16];
9963 env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[17];
9966 if (mode
== ARM_CPU_MODE_SVC
) {
9967 env
->regs
[14] = env
->xregs
[18];
9968 env
->regs
[13] = env
->xregs
[19];
9970 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[18];
9971 env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[19];
9974 if (mode
== ARM_CPU_MODE_ABT
) {
9975 env
->regs
[14] = env
->xregs
[20];
9976 env
->regs
[13] = env
->xregs
[21];
9978 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[20];
9979 env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[21];
9982 if (mode
== ARM_CPU_MODE_UND
) {
9983 env
->regs
[14] = env
->xregs
[22];
9984 env
->regs
[13] = env
->xregs
[23];
9986 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[22];
9987 env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[23];
9990 /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
9991 * mode, then we can copy to r8-r14. Otherwise, we copy to the
9992 * FIQ bank for r8-r14.
9994 if (mode
== ARM_CPU_MODE_FIQ
) {
9995 for (i
= 24; i
< 31; i
++) {
9996 env
->regs
[i
- 16] = env
->xregs
[i
]; /* X[24:30] -> R[8:14] */
9999 for (i
= 24; i
< 29; i
++) {
10000 env
->fiq_regs
[i
- 24] = env
->xregs
[i
];
10002 env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[29];
10003 env
->banked_r14
[r14_bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[30];
10006 env
->regs
[15] = env
->pc
;
10009 static void take_aarch32_exception(CPUARMState
*env
, int new_mode
,
10010 uint32_t mask
, uint32_t offset
,
10013 /* Change the CPU state so as to actually take the exception. */
10014 switch_mode(env
, new_mode
);
10016 * For exceptions taken to AArch32 we must clear the SS bit in both
10017 * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
10019 env
->uncached_cpsr
&= ~PSTATE_SS
;
10020 env
->spsr
= cpsr_read(env
);
10021 /* Clear IT bits. */
10022 env
->condexec_bits
= 0;
10023 /* Switch to the new mode, and to the correct instruction set. */
10024 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~CPSR_M
) | new_mode
;
10025 /* Set new mode endianness */
10026 env
->uncached_cpsr
&= ~CPSR_E
;
10027 if (env
->cp15
.sctlr_el
[arm_current_el(env
)] & SCTLR_EE
) {
10028 env
->uncached_cpsr
|= CPSR_E
;
10030 /* J and IL must always be cleared for exception entry */
10031 env
->uncached_cpsr
&= ~(CPSR_IL
| CPSR_J
);
10034 if (new_mode
== ARM_CPU_MODE_HYP
) {
10035 env
->thumb
= (env
->cp15
.sctlr_el
[2] & SCTLR_TE
) != 0;
10036 env
->elr_el
[2] = env
->regs
[15];
10039 * this is a lie, as there was no c1_sys on V4T/V5, but who cares
10040 * and we should just guard the thumb mode on V4
10042 if (arm_feature(env
, ARM_FEATURE_V4T
)) {
10044 (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_TE
) != 0;
10046 env
->regs
[14] = env
->regs
[15] + offset
;
10048 env
->regs
[15] = newpc
;
10051 static void arm_cpu_do_interrupt_aarch32_hyp(CPUState
*cs
)
10054 * Handle exception entry to Hyp mode; this is sufficiently
10055 * different to entry to other AArch32 modes that we handle it
10058 * The vector table entry used is always the 0x14 Hyp mode entry point,
10059 * unless this is an UNDEF/HVC/abort taken from Hyp to Hyp.
10060 * The offset applied to the preferred return address is always zero
10061 * (see DDI0487C.a section G1.12.3).
10062 * PSTATE A/I/F masks are set based only on the SCR.EA/IRQ/FIQ values.
10064 uint32_t addr
, mask
;
10065 ARMCPU
*cpu
= ARM_CPU(cs
);
10066 CPUARMState
*env
= &cpu
->env
;
10068 switch (cs
->exception_index
) {
10076 /* Fall through to prefetch abort. */
10077 case EXCP_PREFETCH_ABORT
:
10078 env
->cp15
.ifar_s
= env
->exception
.vaddress
;
10079 qemu_log_mask(CPU_LOG_INT
, "...with HIFAR 0x%x\n",
10080 (uint32_t)env
->exception
.vaddress
);
10083 case EXCP_DATA_ABORT
:
10084 env
->cp15
.dfar_s
= env
->exception
.vaddress
;
10085 qemu_log_mask(CPU_LOG_INT
, "...with HDFAR 0x%x\n",
10086 (uint32_t)env
->exception
.vaddress
);
10098 case EXCP_HYP_TRAP
:
10101 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
10104 if (cs
->exception_index
!= EXCP_IRQ
&& cs
->exception_index
!= EXCP_FIQ
) {
10105 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
10107 * QEMU syndrome values are v8-style. v7 has the IL bit
10108 * UNK/SBZP for "field not valid" cases, where v8 uses RES1.
10109 * If this is a v7 CPU, squash the IL bit in those cases.
10111 if (cs
->exception_index
== EXCP_PREFETCH_ABORT
||
10112 (cs
->exception_index
== EXCP_DATA_ABORT
&&
10113 !(env
->exception
.syndrome
& ARM_EL_ISV
)) ||
10114 syn_get_ec(env
->exception
.syndrome
) == EC_UNCATEGORIZED
) {
10115 env
->exception
.syndrome
&= ~ARM_EL_IL
;
10118 env
->cp15
.esr_el
[2] = env
->exception
.syndrome
;
10121 if (arm_current_el(env
) != 2 && addr
< 0x14) {
10126 if (!(env
->cp15
.scr_el3
& SCR_EA
)) {
10129 if (!(env
->cp15
.scr_el3
& SCR_IRQ
)) {
10132 if (!(env
->cp15
.scr_el3
& SCR_FIQ
)) {
10136 addr
+= env
->cp15
.hvbar
;
10138 take_aarch32_exception(env
, ARM_CPU_MODE_HYP
, mask
, 0, addr
);
10141 static void arm_cpu_do_interrupt_aarch32(CPUState
*cs
)
10143 ARMCPU
*cpu
= ARM_CPU(cs
);
10144 CPUARMState
*env
= &cpu
->env
;
10151 /* If this is a debug exception we must update the DBGDSCR.MOE bits */
10152 switch (syn_get_ec(env
->exception
.syndrome
)) {
10153 case EC_BREAKPOINT
:
10154 case EC_BREAKPOINT_SAME_EL
:
10157 case EC_WATCHPOINT
:
10158 case EC_WATCHPOINT_SAME_EL
:
10164 case EC_VECTORCATCH
:
10173 env
->cp15
.mdscr_el1
= deposit64(env
->cp15
.mdscr_el1
, 2, 4, moe
);
10176 if (env
->exception
.target_el
== 2) {
10177 arm_cpu_do_interrupt_aarch32_hyp(cs
);
10181 switch (cs
->exception_index
) {
10183 new_mode
= ARM_CPU_MODE_UND
;
10192 new_mode
= ARM_CPU_MODE_SVC
;
10195 /* The PC already points to the next instruction. */
10199 /* Fall through to prefetch abort. */
10200 case EXCP_PREFETCH_ABORT
:
10201 A32_BANKED_CURRENT_REG_SET(env
, ifsr
, env
->exception
.fsr
);
10202 A32_BANKED_CURRENT_REG_SET(env
, ifar
, env
->exception
.vaddress
);
10203 qemu_log_mask(CPU_LOG_INT
, "...with IFSR 0x%x IFAR 0x%x\n",
10204 env
->exception
.fsr
, (uint32_t)env
->exception
.vaddress
);
10205 new_mode
= ARM_CPU_MODE_ABT
;
10207 mask
= CPSR_A
| CPSR_I
;
10210 case EXCP_DATA_ABORT
:
10211 A32_BANKED_CURRENT_REG_SET(env
, dfsr
, env
->exception
.fsr
);
10212 A32_BANKED_CURRENT_REG_SET(env
, dfar
, env
->exception
.vaddress
);
10213 qemu_log_mask(CPU_LOG_INT
, "...with DFSR 0x%x DFAR 0x%x\n",
10214 env
->exception
.fsr
,
10215 (uint32_t)env
->exception
.vaddress
);
10216 new_mode
= ARM_CPU_MODE_ABT
;
10218 mask
= CPSR_A
| CPSR_I
;
10222 new_mode
= ARM_CPU_MODE_IRQ
;
10224 /* Disable IRQ and imprecise data aborts. */
10225 mask
= CPSR_A
| CPSR_I
;
10227 if (env
->cp15
.scr_el3
& SCR_IRQ
) {
10228 /* IRQ routed to monitor mode */
10229 new_mode
= ARM_CPU_MODE_MON
;
10234 new_mode
= ARM_CPU_MODE_FIQ
;
10236 /* Disable FIQ, IRQ and imprecise data aborts. */
10237 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
10238 if (env
->cp15
.scr_el3
& SCR_FIQ
) {
10239 /* FIQ routed to monitor mode */
10240 new_mode
= ARM_CPU_MODE_MON
;
10245 new_mode
= ARM_CPU_MODE_IRQ
;
10247 /* Disable IRQ and imprecise data aborts. */
10248 mask
= CPSR_A
| CPSR_I
;
10252 new_mode
= ARM_CPU_MODE_FIQ
;
10254 /* Disable FIQ, IRQ and imprecise data aborts. */
10255 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
10259 new_mode
= ARM_CPU_MODE_MON
;
10261 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
10265 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
10266 return; /* Never happens. Keep compiler happy. */
10269 if (new_mode
== ARM_CPU_MODE_MON
) {
10270 addr
+= env
->cp15
.mvbar
;
10271 } else if (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_V
) {
10272 /* High vectors. When enabled, base address cannot be remapped. */
10273 addr
+= 0xffff0000;
10275 /* ARM v7 architectures provide a vector base address register to remap
10276 * the interrupt vector table.
10277 * This register is only followed in non-monitor mode, and is banked.
10278 * Note: only bits 31:5 are valid.
10280 addr
+= A32_BANKED_CURRENT_REG_GET(env
, vbar
);
10283 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
) {
10284 env
->cp15
.scr_el3
&= ~SCR_NS
;
10287 take_aarch32_exception(env
, new_mode
, mask
, offset
, addr
);
10290 /* Handle exception entry to a target EL which is using AArch64 */
10291 static void arm_cpu_do_interrupt_aarch64(CPUState
*cs
)
10293 ARMCPU
*cpu
= ARM_CPU(cs
);
10294 CPUARMState
*env
= &cpu
->env
;
10295 unsigned int new_el
= env
->exception
.target_el
;
10296 target_ulong addr
= env
->cp15
.vbar_el
[new_el
];
10297 unsigned int new_mode
= aarch64_pstate_mode(new_el
, true);
10298 unsigned int cur_el
= arm_current_el(env
);
10301 * Note that new_el can never be 0. If cur_el is 0, then
10302 * el0_a64 is is_a64(), else el0_a64 is ignored.
10304 aarch64_sve_change_el(env
, cur_el
, new_el
, is_a64(env
));
10306 if (cur_el
< new_el
) {
10307 /* Entry vector offset depends on whether the implemented EL
10308 * immediately lower than the target level is using AArch32 or AArch64
10314 is_aa64
= (env
->cp15
.scr_el3
& SCR_RW
) != 0;
10317 is_aa64
= (env
->cp15
.hcr_el2
& HCR_RW
) != 0;
10320 is_aa64
= is_a64(env
);
10323 g_assert_not_reached();
10331 } else if (pstate_read(env
) & PSTATE_SP
) {
10335 switch (cs
->exception_index
) {
10336 case EXCP_PREFETCH_ABORT
:
10337 case EXCP_DATA_ABORT
:
10338 env
->cp15
.far_el
[new_el
] = env
->exception
.vaddress
;
10339 qemu_log_mask(CPU_LOG_INT
, "...with FAR 0x%" PRIx64
"\n",
10340 env
->cp15
.far_el
[new_el
]);
10346 case EXCP_HYP_TRAP
:
10348 if (syn_get_ec(env
->exception
.syndrome
) == EC_ADVSIMDFPACCESSTRAP
) {
10350 * QEMU internal FP/SIMD syndromes from AArch32 include the
10351 * TA and coproc fields which are only exposed if the exception
10352 * is taken to AArch32 Hyp mode. Mask them out to get a valid
10353 * AArch64 format syndrome.
10355 env
->exception
.syndrome
&= ~MAKE_64BIT_MASK(0, 20);
10357 env
->cp15
.esr_el
[new_el
] = env
->exception
.syndrome
;
10367 case EXCP_SEMIHOST
:
10368 qemu_log_mask(CPU_LOG_INT
,
10369 "...handling as semihosting call 0x%" PRIx64
"\n",
10371 env
->xregs
[0] = do_arm_semihosting(env
);
10374 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
10378 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = pstate_read(env
);
10379 aarch64_save_sp(env
, arm_current_el(env
));
10380 env
->elr_el
[new_el
] = env
->pc
;
10382 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = cpsr_read(env
);
10383 env
->elr_el
[new_el
] = env
->regs
[15];
10385 aarch64_sync_32_to_64(env
);
10387 env
->condexec_bits
= 0;
10389 qemu_log_mask(CPU_LOG_INT
, "...with ELR 0x%" PRIx64
"\n",
10390 env
->elr_el
[new_el
]);
10392 pstate_write(env
, PSTATE_DAIF
| new_mode
);
10394 aarch64_restore_sp(env
, new_el
);
10398 qemu_log_mask(CPU_LOG_INT
, "...to EL%d PC 0x%" PRIx64
" PSTATE 0x%x\n",
10399 new_el
, env
->pc
, pstate_read(env
));
10402 static inline bool check_for_semihosting(CPUState
*cs
)
10405 /* Check whether this exception is a semihosting call; if so
10406 * then handle it and return true; otherwise return false.
10408 ARMCPU
*cpu
= ARM_CPU(cs
);
10409 CPUARMState
*env
= &cpu
->env
;
10412 if (cs
->exception_index
== EXCP_SEMIHOST
) {
10413 /* This is always the 64-bit semihosting exception.
10414 * The "is this usermode" and "is semihosting enabled"
10415 * checks have been done at translate time.
10417 qemu_log_mask(CPU_LOG_INT
,
10418 "...handling as semihosting call 0x%" PRIx64
"\n",
10420 env
->xregs
[0] = do_arm_semihosting(env
);
10427 /* Only intercept calls from privileged modes, to provide some
10428 * semblance of security.
10430 if (cs
->exception_index
!= EXCP_SEMIHOST
&&
10431 (!semihosting_enabled() ||
10432 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
))) {
10436 switch (cs
->exception_index
) {
10437 case EXCP_SEMIHOST
:
10438 /* This is always a semihosting call; the "is this usermode"
10439 * and "is semihosting enabled" checks have been done at
10444 /* Check for semihosting interrupt. */
10446 imm
= arm_lduw_code(env
, env
->regs
[15] - 2, arm_sctlr_b(env
))
10452 imm
= arm_ldl_code(env
, env
->regs
[15] - 4, arm_sctlr_b(env
))
10454 if (imm
== 0x123456) {
10460 /* See if this is a semihosting syscall. */
10462 imm
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
))
10465 env
->regs
[15] += 2;
10474 qemu_log_mask(CPU_LOG_INT
,
10475 "...handling as semihosting call 0x%x\n",
10477 env
->regs
[0] = do_arm_semihosting(env
);
10485 /* Handle a CPU exception for A and R profile CPUs.
10486 * Do any appropriate logging, handle PSCI calls, and then hand off
10487 * to the AArch64-entry or AArch32-entry function depending on the
10488 * target exception level's register width.
10490 void arm_cpu_do_interrupt(CPUState
*cs
)
10492 ARMCPU
*cpu
= ARM_CPU(cs
);
10493 CPUARMState
*env
= &cpu
->env
;
10494 unsigned int new_el
= env
->exception
.target_el
;
10496 assert(!arm_feature(env
, ARM_FEATURE_M
));
10498 arm_log_exception(cs
->exception_index
);
10499 qemu_log_mask(CPU_LOG_INT
, "...from EL%d to EL%d\n", arm_current_el(env
),
10501 if (qemu_loglevel_mask(CPU_LOG_INT
)
10502 && !excp_is_internal(cs
->exception_index
)) {
10503 qemu_log_mask(CPU_LOG_INT
, "...with ESR 0x%x/0x%" PRIx32
"\n",
10504 syn_get_ec(env
->exception
.syndrome
),
10505 env
->exception
.syndrome
);
10508 if (arm_is_psci_call(cpu
, cs
->exception_index
)) {
10509 arm_handle_psci_call(cpu
);
10510 qemu_log_mask(CPU_LOG_INT
, "...handled as PSCI call\n");
10514 /* Semihosting semantics depend on the register width of the
10515 * code that caused the exception, not the target exception level,
10516 * so must be handled here.
10518 if (check_for_semihosting(cs
)) {
10522 /* Hooks may change global state so BQL should be held, also the
10523 * BQL needs to be held for any modification of
10524 * cs->interrupt_request.
10526 g_assert(qemu_mutex_iothread_locked());
10528 arm_call_pre_el_change_hook(cpu
);
10530 assert(!excp_is_internal(cs
->exception_index
));
10531 if (arm_el_is_aa64(env
, new_el
)) {
10532 arm_cpu_do_interrupt_aarch64(cs
);
10534 arm_cpu_do_interrupt_aarch32(cs
);
10537 arm_call_el_change_hook(cpu
);
10539 if (!kvm_enabled()) {
10540 cs
->interrupt_request
|= CPU_INTERRUPT_EXITTB
;
10543 #endif /* !CONFIG_USER_ONLY */
10545 /* Return the exception level which controls this address translation regime */
10546 static inline uint32_t regime_el(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
10549 case ARMMMUIdx_S2NS
:
10550 case ARMMMUIdx_S1E2
:
10552 case ARMMMUIdx_S1E3
:
10554 case ARMMMUIdx_S1SE0
:
10555 return arm_el_is_aa64(env
, 3) ? 1 : 3;
10556 case ARMMMUIdx_S1SE1
:
10557 case ARMMMUIdx_S1NSE0
:
10558 case ARMMMUIdx_S1NSE1
:
10559 case ARMMMUIdx_MPrivNegPri
:
10560 case ARMMMUIdx_MUserNegPri
:
10561 case ARMMMUIdx_MPriv
:
10562 case ARMMMUIdx_MUser
:
10563 case ARMMMUIdx_MSPrivNegPri
:
10564 case ARMMMUIdx_MSUserNegPri
:
10565 case ARMMMUIdx_MSPriv
:
10566 case ARMMMUIdx_MSUser
:
10569 g_assert_not_reached();
10573 #ifndef CONFIG_USER_ONLY
10575 /* Return the SCTLR value which controls this address translation regime */
10576 static inline uint32_t regime_sctlr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
10578 return env
->cp15
.sctlr_el
[regime_el(env
, mmu_idx
)];
10581 /* Return true if the specified stage of address translation is disabled */
10582 static inline bool regime_translation_disabled(CPUARMState
*env
,
10585 if (arm_feature(env
, ARM_FEATURE_M
)) {
10586 switch (env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)] &
10587 (R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
)) {
10588 case R_V7M_MPU_CTRL_ENABLE_MASK
:
10589 /* Enabled, but not for HardFault and NMI */
10590 return mmu_idx
& ARM_MMU_IDX_M_NEGPRI
;
10591 case R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
:
10592 /* Enabled for all cases */
10596 /* HFNMIENA set and ENABLE clear is UNPREDICTABLE, but
10597 * we warned about that in armv7m_nvic.c when the guest set it.
10603 if (mmu_idx
== ARMMMUIdx_S2NS
) {
10604 /* HCR.DC means HCR.VM behaves as 1 */
10605 return (env
->cp15
.hcr_el2
& (HCR_DC
| HCR_VM
)) == 0;
10608 if (env
->cp15
.hcr_el2
& HCR_TGE
) {
10609 /* TGE means that NS EL0/1 act as if SCTLR_EL1.M is zero */
10610 if (!regime_is_secure(env
, mmu_idx
) && regime_el(env
, mmu_idx
) == 1) {
10615 if ((env
->cp15
.hcr_el2
& HCR_DC
) &&
10616 (mmu_idx
== ARMMMUIdx_S1NSE0
|| mmu_idx
== ARMMMUIdx_S1NSE1
)) {
10617 /* HCR.DC means SCTLR_EL1.M behaves as 0 */
10621 return (regime_sctlr(env
, mmu_idx
) & SCTLR_M
) == 0;
10624 static inline bool regime_translation_big_endian(CPUARMState
*env
,
10627 return (regime_sctlr(env
, mmu_idx
) & SCTLR_EE
) != 0;
10630 /* Return the TTBR associated with this translation regime */
10631 static inline uint64_t regime_ttbr(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
10634 if (mmu_idx
== ARMMMUIdx_S2NS
) {
10635 return env
->cp15
.vttbr_el2
;
10638 return env
->cp15
.ttbr0_el
[regime_el(env
, mmu_idx
)];
10640 return env
->cp15
.ttbr1_el
[regime_el(env
, mmu_idx
)];
10644 #endif /* !CONFIG_USER_ONLY */
10646 /* Return the TCR controlling this translation regime */
10647 static inline TCR
*regime_tcr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
10649 if (mmu_idx
== ARMMMUIdx_S2NS
) {
10650 return &env
->cp15
.vtcr_el2
;
10652 return &env
->cp15
.tcr_el
[regime_el(env
, mmu_idx
)];
10655 /* Convert a possible stage1+2 MMU index into the appropriate
10656 * stage 1 MMU index
10658 static inline ARMMMUIdx
stage_1_mmu_idx(ARMMMUIdx mmu_idx
)
10660 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
10661 mmu_idx
+= (ARMMMUIdx_S1NSE0
- ARMMMUIdx_S12NSE0
);
10666 /* Return true if the translation regime is using LPAE format page tables */
10667 static inline bool regime_using_lpae_format(CPUARMState
*env
,
10670 int el
= regime_el(env
, mmu_idx
);
10671 if (el
== 2 || arm_el_is_aa64(env
, el
)) {
10674 if (arm_feature(env
, ARM_FEATURE_LPAE
)
10675 && (regime_tcr(env
, mmu_idx
)->raw_tcr
& TTBCR_EAE
)) {
10681 /* Returns true if the stage 1 translation regime is using LPAE format page
10682 * tables. Used when raising alignment exceptions, whose FSR changes depending
10683 * on whether the long or short descriptor format is in use. */
10684 bool arm_s1_regime_using_lpae_format(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
10686 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
10688 return regime_using_lpae_format(env
, mmu_idx
);
10691 #ifndef CONFIG_USER_ONLY
10692 static inline bool regime_is_user(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
10695 case ARMMMUIdx_S1SE0
:
10696 case ARMMMUIdx_S1NSE0
:
10697 case ARMMMUIdx_MUser
:
10698 case ARMMMUIdx_MSUser
:
10699 case ARMMMUIdx_MUserNegPri
:
10700 case ARMMMUIdx_MSUserNegPri
:
10704 case ARMMMUIdx_S12NSE0
:
10705 case ARMMMUIdx_S12NSE1
:
10706 g_assert_not_reached();
10710 /* Translate section/page access permissions to page
10711 * R/W protection flags
10713 * @env: CPUARMState
10714 * @mmu_idx: MMU index indicating required translation regime
10715 * @ap: The 3-bit access permissions (AP[2:0])
10716 * @domain_prot: The 2-bit domain access permissions
10718 static inline int ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
10719 int ap
, int domain_prot
)
10721 bool is_user
= regime_is_user(env
, mmu_idx
);
10723 if (domain_prot
== 3) {
10724 return PAGE_READ
| PAGE_WRITE
;
10729 if (arm_feature(env
, ARM_FEATURE_V7
)) {
10732 switch (regime_sctlr(env
, mmu_idx
) & (SCTLR_S
| SCTLR_R
)) {
10734 return is_user
? 0 : PAGE_READ
;
10741 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
10746 return PAGE_READ
| PAGE_WRITE
;
10749 return PAGE_READ
| PAGE_WRITE
;
10750 case 4: /* Reserved. */
10753 return is_user
? 0 : PAGE_READ
;
10757 if (!arm_feature(env
, ARM_FEATURE_V6K
)) {
10762 g_assert_not_reached();
10766 /* Translate section/page access permissions to page
10767 * R/W protection flags.
10769 * @ap: The 2-bit simple AP (AP[2:1])
10770 * @is_user: TRUE if accessing from PL0
10772 static inline int simple_ap_to_rw_prot_is_user(int ap
, bool is_user
)
10776 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
10778 return PAGE_READ
| PAGE_WRITE
;
10780 return is_user
? 0 : PAGE_READ
;
10784 g_assert_not_reached();
10789 simple_ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, int ap
)
10791 return simple_ap_to_rw_prot_is_user(ap
, regime_is_user(env
, mmu_idx
));
10794 /* Translate S2 section/page access permissions to protection flags
10796 * @env: CPUARMState
10797 * @s2ap: The 2-bit stage2 access permissions (S2AP)
10798 * @xn: XN (execute-never) bit
10800 static int get_S2prot(CPUARMState
*env
, int s2ap
, int xn
)
10808 prot
|= PAGE_WRITE
;
10811 if (arm_el_is_aa64(env
, 2) || prot
& PAGE_READ
) {
10818 /* Translate section/page access permissions to protection flags
10820 * @env: CPUARMState
10821 * @mmu_idx: MMU index indicating required translation regime
10822 * @is_aa64: TRUE if AArch64
10823 * @ap: The 2-bit simple AP (AP[2:1])
10824 * @ns: NS (non-secure) bit
10825 * @xn: XN (execute-never) bit
10826 * @pxn: PXN (privileged execute-never) bit
10828 static int get_S1prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, bool is_aa64
,
10829 int ap
, int ns
, int xn
, int pxn
)
10831 bool is_user
= regime_is_user(env
, mmu_idx
);
10832 int prot_rw
, user_rw
;
10836 assert(mmu_idx
!= ARMMMUIdx_S2NS
);
10838 user_rw
= simple_ap_to_rw_prot_is_user(ap
, true);
10842 prot_rw
= simple_ap_to_rw_prot_is_user(ap
, false);
10845 if (ns
&& arm_is_secure(env
) && (env
->cp15
.scr_el3
& SCR_SIF
)) {
10849 /* TODO have_wxn should be replaced with
10850 * ARM_FEATURE_V8 || (ARM_FEATURE_V7 && ARM_FEATURE_EL2)
10851 * when ARM_FEATURE_EL2 starts getting set. For now we assume all LPAE
10852 * compatible processors have EL2, which is required for [U]WXN.
10854 have_wxn
= arm_feature(env
, ARM_FEATURE_LPAE
);
10857 wxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_WXN
;
10861 switch (regime_el(env
, mmu_idx
)) {
10864 xn
= pxn
|| (user_rw
& PAGE_WRITE
);
10871 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
10872 switch (regime_el(env
, mmu_idx
)) {
10876 xn
= xn
|| !(user_rw
& PAGE_READ
);
10880 uwxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_UWXN
;
10882 xn
= xn
|| !(prot_rw
& PAGE_READ
) || pxn
||
10883 (uwxn
&& (user_rw
& PAGE_WRITE
));
10893 if (xn
|| (wxn
&& (prot_rw
& PAGE_WRITE
))) {
10896 return prot_rw
| PAGE_EXEC
;
10899 static bool get_level1_table_address(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
10900 uint32_t *table
, uint32_t address
)
10902 /* Note that we can only get here for an AArch32 PL0/PL1 lookup */
10903 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
10905 if (address
& tcr
->mask
) {
10906 if (tcr
->raw_tcr
& TTBCR_PD1
) {
10907 /* Translation table walk disabled for TTBR1 */
10910 *table
= regime_ttbr(env
, mmu_idx
, 1) & 0xffffc000;
10912 if (tcr
->raw_tcr
& TTBCR_PD0
) {
10913 /* Translation table walk disabled for TTBR0 */
10916 *table
= regime_ttbr(env
, mmu_idx
, 0) & tcr
->base_mask
;
10918 *table
|= (address
>> 18) & 0x3ffc;
10922 /* Translate a S1 pagetable walk through S2 if needed. */
10923 static hwaddr
S1_ptw_translate(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
10924 hwaddr addr
, MemTxAttrs txattrs
,
10925 ARMMMUFaultInfo
*fi
)
10927 if ((mmu_idx
== ARMMMUIdx_S1NSE0
|| mmu_idx
== ARMMMUIdx_S1NSE1
) &&
10928 !regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
10929 target_ulong s2size
;
10933 ARMCacheAttrs cacheattrs
= {};
10934 ARMCacheAttrs
*pcacheattrs
= NULL
;
10936 if (env
->cp15
.hcr_el2
& HCR_PTW
) {
10938 * PTW means we must fault if this S1 walk touches S2 Device
10939 * memory; otherwise we don't care about the attributes and can
10940 * save the S2 translation the effort of computing them.
10942 pcacheattrs
= &cacheattrs
;
10945 ret
= get_phys_addr_lpae(env
, addr
, 0, ARMMMUIdx_S2NS
, &s2pa
,
10946 &txattrs
, &s2prot
, &s2size
, fi
, pcacheattrs
);
10948 assert(fi
->type
!= ARMFault_None
);
10954 if (pcacheattrs
&& (pcacheattrs
->attrs
& 0xf0) == 0) {
10955 /* Access was to Device memory: generate Permission fault */
10956 fi
->type
= ARMFault_Permission
;
10967 /* All loads done in the course of a page table walk go through here. */
10968 static uint32_t arm_ldl_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
10969 ARMMMUIdx mmu_idx
, ARMMMUFaultInfo
*fi
)
10971 ARMCPU
*cpu
= ARM_CPU(cs
);
10972 CPUARMState
*env
= &cpu
->env
;
10973 MemTxAttrs attrs
= {};
10974 MemTxResult result
= MEMTX_OK
;
10978 attrs
.secure
= is_secure
;
10979 as
= arm_addressspace(cs
, attrs
);
10980 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fi
);
10984 if (regime_translation_big_endian(env
, mmu_idx
)) {
10985 data
= address_space_ldl_be(as
, addr
, attrs
, &result
);
10987 data
= address_space_ldl_le(as
, addr
, attrs
, &result
);
10989 if (result
== MEMTX_OK
) {
10992 fi
->type
= ARMFault_SyncExternalOnWalk
;
10993 fi
->ea
= arm_extabort_type(result
);
10997 static uint64_t arm_ldq_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
10998 ARMMMUIdx mmu_idx
, ARMMMUFaultInfo
*fi
)
11000 ARMCPU
*cpu
= ARM_CPU(cs
);
11001 CPUARMState
*env
= &cpu
->env
;
11002 MemTxAttrs attrs
= {};
11003 MemTxResult result
= MEMTX_OK
;
11007 attrs
.secure
= is_secure
;
11008 as
= arm_addressspace(cs
, attrs
);
11009 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fi
);
11013 if (regime_translation_big_endian(env
, mmu_idx
)) {
11014 data
= address_space_ldq_be(as
, addr
, attrs
, &result
);
11016 data
= address_space_ldq_le(as
, addr
, attrs
, &result
);
11018 if (result
== MEMTX_OK
) {
11021 fi
->type
= ARMFault_SyncExternalOnWalk
;
11022 fi
->ea
= arm_extabort_type(result
);
11026 static bool get_phys_addr_v5(CPUARMState
*env
, uint32_t address
,
11027 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
11028 hwaddr
*phys_ptr
, int *prot
,
11029 target_ulong
*page_size
,
11030 ARMMMUFaultInfo
*fi
)
11032 CPUState
*cs
= env_cpu(env
);
11043 /* Pagetable walk. */
11044 /* Lookup l1 descriptor. */
11045 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
11046 /* Section translation fault if page walk is disabled by PD0 or PD1 */
11047 fi
->type
= ARMFault_Translation
;
11050 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
11052 if (fi
->type
!= ARMFault_None
) {
11056 domain
= (desc
>> 5) & 0x0f;
11057 if (regime_el(env
, mmu_idx
) == 1) {
11058 dacr
= env
->cp15
.dacr_ns
;
11060 dacr
= env
->cp15
.dacr_s
;
11062 domain_prot
= (dacr
>> (domain
* 2)) & 3;
11064 /* Section translation fault. */
11065 fi
->type
= ARMFault_Translation
;
11071 if (domain_prot
== 0 || domain_prot
== 2) {
11072 fi
->type
= ARMFault_Domain
;
11077 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
11078 ap
= (desc
>> 10) & 3;
11079 *page_size
= 1024 * 1024;
11081 /* Lookup l2 entry. */
11083 /* Coarse pagetable. */
11084 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
11086 /* Fine pagetable. */
11087 table
= (desc
& 0xfffff000) | ((address
>> 8) & 0xffc);
11089 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
11091 if (fi
->type
!= ARMFault_None
) {
11094 switch (desc
& 3) {
11095 case 0: /* Page translation fault. */
11096 fi
->type
= ARMFault_Translation
;
11098 case 1: /* 64k page. */
11099 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
11100 ap
= (desc
>> (4 + ((address
>> 13) & 6))) & 3;
11101 *page_size
= 0x10000;
11103 case 2: /* 4k page. */
11104 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
11105 ap
= (desc
>> (4 + ((address
>> 9) & 6))) & 3;
11106 *page_size
= 0x1000;
11108 case 3: /* 1k page, or ARMv6/XScale "extended small (4k) page" */
11110 /* ARMv6/XScale extended small page format */
11111 if (arm_feature(env
, ARM_FEATURE_XSCALE
)
11112 || arm_feature(env
, ARM_FEATURE_V6
)) {
11113 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
11114 *page_size
= 0x1000;
11116 /* UNPREDICTABLE in ARMv5; we choose to take a
11117 * page translation fault.
11119 fi
->type
= ARMFault_Translation
;
11123 phys_addr
= (desc
& 0xfffffc00) | (address
& 0x3ff);
11124 *page_size
= 0x400;
11126 ap
= (desc
>> 4) & 3;
11129 /* Never happens, but compiler isn't smart enough to tell. */
11133 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
11134 *prot
|= *prot
? PAGE_EXEC
: 0;
11135 if (!(*prot
& (1 << access_type
))) {
11136 /* Access permission fault. */
11137 fi
->type
= ARMFault_Permission
;
11140 *phys_ptr
= phys_addr
;
11143 fi
->domain
= domain
;
11148 static bool get_phys_addr_v6(CPUARMState
*env
, uint32_t address
,
11149 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
11150 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
11151 target_ulong
*page_size
, ARMMMUFaultInfo
*fi
)
11153 CPUState
*cs
= env_cpu(env
);
11167 /* Pagetable walk. */
11168 /* Lookup l1 descriptor. */
11169 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
11170 /* Section translation fault if page walk is disabled by PD0 or PD1 */
11171 fi
->type
= ARMFault_Translation
;
11174 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
11176 if (fi
->type
!= ARMFault_None
) {
11180 if (type
== 0 || (type
== 3 && !arm_feature(env
, ARM_FEATURE_PXN
))) {
11181 /* Section translation fault, or attempt to use the encoding
11182 * which is Reserved on implementations without PXN.
11184 fi
->type
= ARMFault_Translation
;
11187 if ((type
== 1) || !(desc
& (1 << 18))) {
11188 /* Page or Section. */
11189 domain
= (desc
>> 5) & 0x0f;
11191 if (regime_el(env
, mmu_idx
) == 1) {
11192 dacr
= env
->cp15
.dacr_ns
;
11194 dacr
= env
->cp15
.dacr_s
;
11199 domain_prot
= (dacr
>> (domain
* 2)) & 3;
11200 if (domain_prot
== 0 || domain_prot
== 2) {
11201 /* Section or Page domain fault */
11202 fi
->type
= ARMFault_Domain
;
11206 if (desc
& (1 << 18)) {
11207 /* Supersection. */
11208 phys_addr
= (desc
& 0xff000000) | (address
& 0x00ffffff);
11209 phys_addr
|= (uint64_t)extract32(desc
, 20, 4) << 32;
11210 phys_addr
|= (uint64_t)extract32(desc
, 5, 4) << 36;
11211 *page_size
= 0x1000000;
11214 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
11215 *page_size
= 0x100000;
11217 ap
= ((desc
>> 10) & 3) | ((desc
>> 13) & 4);
11218 xn
= desc
& (1 << 4);
11220 ns
= extract32(desc
, 19, 1);
11222 if (arm_feature(env
, ARM_FEATURE_PXN
)) {
11223 pxn
= (desc
>> 2) & 1;
11225 ns
= extract32(desc
, 3, 1);
11226 /* Lookup l2 entry. */
11227 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
11228 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
11230 if (fi
->type
!= ARMFault_None
) {
11233 ap
= ((desc
>> 4) & 3) | ((desc
>> 7) & 4);
11234 switch (desc
& 3) {
11235 case 0: /* Page translation fault. */
11236 fi
->type
= ARMFault_Translation
;
11238 case 1: /* 64k page. */
11239 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
11240 xn
= desc
& (1 << 15);
11241 *page_size
= 0x10000;
11243 case 2: case 3: /* 4k page. */
11244 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
11246 *page_size
= 0x1000;
11249 /* Never happens, but compiler isn't smart enough to tell. */
11253 if (domain_prot
== 3) {
11254 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
11256 if (pxn
&& !regime_is_user(env
, mmu_idx
)) {
11259 if (xn
&& access_type
== MMU_INST_FETCH
) {
11260 fi
->type
= ARMFault_Permission
;
11264 if (arm_feature(env
, ARM_FEATURE_V6K
) &&
11265 (regime_sctlr(env
, mmu_idx
) & SCTLR_AFE
)) {
11266 /* The simplified model uses AP[0] as an access control bit. */
11267 if ((ap
& 1) == 0) {
11268 /* Access flag fault. */
11269 fi
->type
= ARMFault_AccessFlag
;
11272 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
>> 1);
11274 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
11276 if (*prot
&& !xn
) {
11277 *prot
|= PAGE_EXEC
;
11279 if (!(*prot
& (1 << access_type
))) {
11280 /* Access permission fault. */
11281 fi
->type
= ARMFault_Permission
;
11286 /* The NS bit will (as required by the architecture) have no effect if
11287 * the CPU doesn't support TZ or this is a non-secure translation
11288 * regime, because the attribute will already be non-secure.
11290 attrs
->secure
= false;
11292 *phys_ptr
= phys_addr
;
11295 fi
->domain
= domain
;
11301 * check_s2_mmu_setup
11303 * @is_aa64: True if the translation regime is in AArch64 state
11304 * @startlevel: Suggested starting level
11305 * @inputsize: Bitsize of IPAs
11306 * @stride: Page-table stride (See the ARM ARM)
11308 * Returns true if the suggested S2 translation parameters are OK and
11311 static bool check_s2_mmu_setup(ARMCPU
*cpu
, bool is_aa64
, int level
,
11312 int inputsize
, int stride
)
11314 const int grainsize
= stride
+ 3;
11315 int startsizecheck
;
11317 /* Negative levels are never allowed. */
11322 startsizecheck
= inputsize
- ((3 - level
) * stride
+ grainsize
);
11323 if (startsizecheck
< 1 || startsizecheck
> stride
+ 4) {
11328 CPUARMState
*env
= &cpu
->env
;
11329 unsigned int pamax
= arm_pamax(cpu
);
11332 case 13: /* 64KB Pages. */
11333 if (level
== 0 || (level
== 1 && pamax
<= 42)) {
11337 case 11: /* 16KB Pages. */
11338 if (level
== 0 || (level
== 1 && pamax
<= 40)) {
11342 case 9: /* 4KB Pages. */
11343 if (level
== 0 && pamax
<= 42) {
11348 g_assert_not_reached();
11351 /* Inputsize checks. */
11352 if (inputsize
> pamax
&&
11353 (arm_el_is_aa64(env
, 1) || inputsize
> 40)) {
11354 /* This is CONSTRAINED UNPREDICTABLE and we choose to fault. */
11358 /* AArch32 only supports 4KB pages. Assert on that. */
11359 assert(stride
== 9);
11368 /* Translate from the 4-bit stage 2 representation of
11369 * memory attributes (without cache-allocation hints) to
11370 * the 8-bit representation of the stage 1 MAIR registers
11371 * (which includes allocation hints).
11373 * ref: shared/translation/attrs/S2AttrDecode()
11374 * .../S2ConvertAttrsHints()
11376 static uint8_t convert_stage2_attrs(CPUARMState
*env
, uint8_t s2attrs
)
11378 uint8_t hiattr
= extract32(s2attrs
, 2, 2);
11379 uint8_t loattr
= extract32(s2attrs
, 0, 2);
11380 uint8_t hihint
= 0, lohint
= 0;
11382 if (hiattr
!= 0) { /* normal memory */
11383 if ((env
->cp15
.hcr_el2
& HCR_CD
) != 0) { /* cache disabled */
11384 hiattr
= loattr
= 1; /* non-cacheable */
11386 if (hiattr
!= 1) { /* Write-through or write-back */
11387 hihint
= 3; /* RW allocate */
11389 if (loattr
!= 1) { /* Write-through or write-back */
11390 lohint
= 3; /* RW allocate */
11395 return (hiattr
<< 6) | (hihint
<< 4) | (loattr
<< 2) | lohint
;
11397 #endif /* !CONFIG_USER_ONLY */
11399 ARMVAParameters
aa64_va_parameters_both(CPUARMState
*env
, uint64_t va
,
11402 uint64_t tcr
= regime_tcr(env
, mmu_idx
)->raw_tcr
;
11403 uint32_t el
= regime_el(env
, mmu_idx
);
11404 bool tbi
, tbid
, epd
, hpd
, using16k
, using64k
;
11408 * Bit 55 is always between the two regions, and is canonical for
11409 * determining if address tagging is enabled.
11411 select
= extract64(va
, 55, 1);
11414 tsz
= extract32(tcr
, 0, 6);
11415 using64k
= extract32(tcr
, 14, 1);
11416 using16k
= extract32(tcr
, 15, 1);
11417 if (mmu_idx
== ARMMMUIdx_S2NS
) {
11419 tbi
= tbid
= hpd
= false;
11421 tbi
= extract32(tcr
, 20, 1);
11422 hpd
= extract32(tcr
, 24, 1);
11423 tbid
= extract32(tcr
, 29, 1);
11426 } else if (!select
) {
11427 tsz
= extract32(tcr
, 0, 6);
11428 epd
= extract32(tcr
, 7, 1);
11429 using64k
= extract32(tcr
, 14, 1);
11430 using16k
= extract32(tcr
, 15, 1);
11431 tbi
= extract64(tcr
, 37, 1);
11432 hpd
= extract64(tcr
, 41, 1);
11433 tbid
= extract64(tcr
, 51, 1);
11435 int tg
= extract32(tcr
, 30, 2);
11436 using16k
= tg
== 1;
11437 using64k
= tg
== 3;
11438 tsz
= extract32(tcr
, 16, 6);
11439 epd
= extract32(tcr
, 23, 1);
11440 tbi
= extract64(tcr
, 38, 1);
11441 hpd
= extract64(tcr
, 42, 1);
11442 tbid
= extract64(tcr
, 52, 1);
11444 tsz
= MIN(tsz
, 39); /* TODO: ARMv8.4-TTST */
11445 tsz
= MAX(tsz
, 16); /* TODO: ARMv8.2-LVA */
11447 return (ARMVAParameters
) {
11454 .using16k
= using16k
,
11455 .using64k
= using64k
,
11459 ARMVAParameters
aa64_va_parameters(CPUARMState
*env
, uint64_t va
,
11460 ARMMMUIdx mmu_idx
, bool data
)
11462 ARMVAParameters ret
= aa64_va_parameters_both(env
, va
, mmu_idx
);
11464 /* Present TBI as a composite with TBID. */
11465 ret
.tbi
&= (data
|| !ret
.tbid
);
11469 #ifndef CONFIG_USER_ONLY
11470 static ARMVAParameters
aa32_va_parameters(CPUARMState
*env
, uint32_t va
,
11473 uint64_t tcr
= regime_tcr(env
, mmu_idx
)->raw_tcr
;
11474 uint32_t el
= regime_el(env
, mmu_idx
);
11478 if (mmu_idx
== ARMMMUIdx_S2NS
) {
11480 bool sext
= extract32(tcr
, 4, 1);
11481 bool sign
= extract32(tcr
, 3, 1);
11484 * If the sign-extend bit is not the same as t0sz[3], the result
11485 * is unpredictable. Flag this as a guest error.
11487 if (sign
!= sext
) {
11488 qemu_log_mask(LOG_GUEST_ERROR
,
11489 "AArch32: VTCR.S / VTCR.T0SZ[3] mismatch\n");
11491 tsz
= sextract32(tcr
, 0, 4) + 8;
11495 } else if (el
== 2) {
11497 tsz
= extract32(tcr
, 0, 3);
11499 hpd
= extract64(tcr
, 24, 1);
11502 int t0sz
= extract32(tcr
, 0, 3);
11503 int t1sz
= extract32(tcr
, 16, 3);
11506 select
= va
> (0xffffffffu
>> t0sz
);
11508 /* Note that we will detect errors later. */
11509 select
= va
>= ~(0xffffffffu
>> t1sz
);
11513 epd
= extract32(tcr
, 7, 1);
11514 hpd
= extract64(tcr
, 41, 1);
11517 epd
= extract32(tcr
, 23, 1);
11518 hpd
= extract64(tcr
, 42, 1);
11520 /* For aarch32, hpd0 is not enabled without t2e as well. */
11521 hpd
&= extract32(tcr
, 6, 1);
11524 return (ARMVAParameters
) {
11532 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
11533 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
11534 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
11535 target_ulong
*page_size_ptr
,
11536 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
11538 ARMCPU
*cpu
= env_archcpu(env
);
11539 CPUState
*cs
= CPU(cpu
);
11540 /* Read an LPAE long-descriptor translation table. */
11541 ARMFaultType fault_type
= ARMFault_Translation
;
11543 ARMVAParameters param
;
11545 hwaddr descaddr
, indexmask
, indexmask_grainsize
;
11546 uint32_t tableattrs
;
11547 target_ulong page_size
;
11550 int addrsize
, inputsize
;
11551 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
11552 int ap
, ns
, xn
, pxn
;
11553 uint32_t el
= regime_el(env
, mmu_idx
);
11555 uint64_t descaddrmask
;
11556 bool aarch64
= arm_el_is_aa64(env
, el
);
11557 bool guarded
= false;
11560 * This code does not handle the different format TCR for VTCR_EL2.
11561 * This code also does not support shareability levels.
11562 * Attribute and permission bit handling should also be checked when adding
11563 * support for those page table walks.
11566 param
= aa64_va_parameters(env
, address
, mmu_idx
,
11567 access_type
!= MMU_INST_FETCH
);
11569 /* If we are in 64-bit EL2 or EL3 then there is no TTBR1, so mark it
11572 ttbr1_valid
= (el
< 2);
11573 addrsize
= 64 - 8 * param
.tbi
;
11574 inputsize
= 64 - param
.tsz
;
11576 param
= aa32_va_parameters(env
, address
, mmu_idx
);
11578 /* There is no TTBR1 for EL2 */
11579 ttbr1_valid
= (el
!= 2);
11580 addrsize
= (mmu_idx
== ARMMMUIdx_S2NS
? 40 : 32);
11581 inputsize
= addrsize
- param
.tsz
;
11585 * We determined the region when collecting the parameters, but we
11586 * have not yet validated that the address is valid for the region.
11587 * Extract the top bits and verify that they all match select.
11589 * For aa32, if inputsize == addrsize, then we have selected the
11590 * region by exclusion in aa32_va_parameters and there is no more
11591 * validation to do here.
11593 if (inputsize
< addrsize
) {
11594 target_ulong top_bits
= sextract64(address
, inputsize
,
11595 addrsize
- inputsize
);
11596 if (-top_bits
!= param
.select
|| (param
.select
&& !ttbr1_valid
)) {
11597 /* The gap between the two regions is a Translation fault */
11598 fault_type
= ARMFault_Translation
;
11603 if (param
.using64k
) {
11605 } else if (param
.using16k
) {
11611 /* Note that QEMU ignores shareability and cacheability attributes,
11612 * so we don't need to do anything with the SH, ORGN, IRGN fields
11613 * in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
11614 * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
11615 * implement any ASID-like capability so we can ignore it (instead
11616 * we will always flush the TLB any time the ASID is changed).
11618 ttbr
= regime_ttbr(env
, mmu_idx
, param
.select
);
11620 /* Here we should have set up all the parameters for the translation:
11621 * inputsize, ttbr, epd, stride, tbi
11625 /* Translation table walk disabled => Translation fault on TLB miss
11626 * Note: This is always 0 on 64-bit EL2 and EL3.
11631 if (mmu_idx
!= ARMMMUIdx_S2NS
) {
11632 /* The starting level depends on the virtual address size (which can
11633 * be up to 48 bits) and the translation granule size. It indicates
11634 * the number of strides (stride bits at a time) needed to
11635 * consume the bits of the input address. In the pseudocode this is:
11636 * level = 4 - RoundUp((inputsize - grainsize) / stride)
11637 * where their 'inputsize' is our 'inputsize', 'grainsize' is
11638 * our 'stride + 3' and 'stride' is our 'stride'.
11639 * Applying the usual "rounded up m/n is (m+n-1)/n" and simplifying:
11640 * = 4 - (inputsize - stride - 3 + stride - 1) / stride
11641 * = 4 - (inputsize - 4) / stride;
11643 level
= 4 - (inputsize
- 4) / stride
;
11645 /* For stage 2 translations the starting level is specified by the
11646 * VTCR_EL2.SL0 field (whose interpretation depends on the page size)
11648 uint32_t sl0
= extract32(tcr
->raw_tcr
, 6, 2);
11649 uint32_t startlevel
;
11652 if (!aarch64
|| stride
== 9) {
11653 /* AArch32 or 4KB pages */
11654 startlevel
= 2 - sl0
;
11656 /* 16KB or 64KB pages */
11657 startlevel
= 3 - sl0
;
11660 /* Check that the starting level is valid. */
11661 ok
= check_s2_mmu_setup(cpu
, aarch64
, startlevel
,
11662 inputsize
, stride
);
11664 fault_type
= ARMFault_Translation
;
11667 level
= startlevel
;
11670 indexmask_grainsize
= (1ULL << (stride
+ 3)) - 1;
11671 indexmask
= (1ULL << (inputsize
- (stride
* (4 - level
)))) - 1;
11673 /* Now we can extract the actual base address from the TTBR */
11674 descaddr
= extract64(ttbr
, 0, 48);
11675 descaddr
&= ~indexmask
;
11677 /* The address field in the descriptor goes up to bit 39 for ARMv7
11678 * but up to bit 47 for ARMv8, but we use the descaddrmask
11679 * up to bit 39 for AArch32, because we don't need other bits in that case
11680 * to construct next descriptor address (anyway they should be all zeroes).
11682 descaddrmask
= ((1ull << (aarch64
? 48 : 40)) - 1) &
11683 ~indexmask_grainsize
;
11685 /* Secure accesses start with the page table in secure memory and
11686 * can be downgraded to non-secure at any step. Non-secure accesses
11687 * remain non-secure. We implement this by just ORing in the NSTable/NS
11688 * bits at each step.
11690 tableattrs
= regime_is_secure(env
, mmu_idx
) ? 0 : (1 << 4);
11692 uint64_t descriptor
;
11695 descaddr
|= (address
>> (stride
* (4 - level
))) & indexmask
;
11697 nstable
= extract32(tableattrs
, 4, 1);
11698 descriptor
= arm_ldq_ptw(cs
, descaddr
, !nstable
, mmu_idx
, fi
);
11699 if (fi
->type
!= ARMFault_None
) {
11703 if (!(descriptor
& 1) ||
11704 (!(descriptor
& 2) && (level
== 3))) {
11705 /* Invalid, or the Reserved level 3 encoding */
11708 descaddr
= descriptor
& descaddrmask
;
11710 if ((descriptor
& 2) && (level
< 3)) {
11711 /* Table entry. The top five bits are attributes which may
11712 * propagate down through lower levels of the table (and
11713 * which are all arranged so that 0 means "no effect", so
11714 * we can gather them up by ORing in the bits at each level).
11716 tableattrs
|= extract64(descriptor
, 59, 5);
11718 indexmask
= indexmask_grainsize
;
11721 /* Block entry at level 1 or 2, or page entry at level 3.
11722 * These are basically the same thing, although the number
11723 * of bits we pull in from the vaddr varies.
11725 page_size
= (1ULL << ((stride
* (4 - level
)) + 3));
11726 descaddr
|= (address
& (page_size
- 1));
11727 /* Extract attributes from the descriptor */
11728 attrs
= extract64(descriptor
, 2, 10)
11729 | (extract64(descriptor
, 52, 12) << 10);
11731 if (mmu_idx
== ARMMMUIdx_S2NS
) {
11732 /* Stage 2 table descriptors do not include any attribute fields */
11735 /* Merge in attributes from table descriptors */
11736 attrs
|= nstable
<< 3; /* NS */
11737 guarded
= extract64(descriptor
, 50, 1); /* GP */
11739 /* HPD disables all the table attributes except NSTable. */
11742 attrs
|= extract32(tableattrs
, 0, 2) << 11; /* XN, PXN */
11743 /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
11744 * means "force PL1 access only", which means forcing AP[1] to 0.
11746 attrs
&= ~(extract32(tableattrs
, 2, 1) << 4); /* !APT[0] => AP[1] */
11747 attrs
|= extract32(tableattrs
, 3, 1) << 5; /* APT[1] => AP[2] */
11750 /* Here descaddr is the final physical address, and attributes
11751 * are all in attrs.
11753 fault_type
= ARMFault_AccessFlag
;
11754 if ((attrs
& (1 << 8)) == 0) {
11759 ap
= extract32(attrs
, 4, 2);
11760 xn
= extract32(attrs
, 12, 1);
11762 if (mmu_idx
== ARMMMUIdx_S2NS
) {
11764 *prot
= get_S2prot(env
, ap
, xn
);
11766 ns
= extract32(attrs
, 3, 1);
11767 pxn
= extract32(attrs
, 11, 1);
11768 *prot
= get_S1prot(env
, mmu_idx
, aarch64
, ap
, ns
, xn
, pxn
);
11771 fault_type
= ARMFault_Permission
;
11772 if (!(*prot
& (1 << access_type
))) {
11777 /* The NS bit will (as required by the architecture) have no effect if
11778 * the CPU doesn't support TZ or this is a non-secure translation
11779 * regime, because the attribute will already be non-secure.
11781 txattrs
->secure
= false;
11783 /* When in aarch64 mode, and BTI is enabled, remember GP in the IOTLB. */
11784 if (aarch64
&& guarded
&& cpu_isar_feature(aa64_bti
, cpu
)) {
11785 txattrs
->target_tlb_bit0
= true;
11788 if (cacheattrs
!= NULL
) {
11789 if (mmu_idx
== ARMMMUIdx_S2NS
) {
11790 cacheattrs
->attrs
= convert_stage2_attrs(env
,
11791 extract32(attrs
, 0, 4));
11793 /* Index into MAIR registers for cache attributes */
11794 uint8_t attrindx
= extract32(attrs
, 0, 3);
11795 uint64_t mair
= env
->cp15
.mair_el
[regime_el(env
, mmu_idx
)];
11796 assert(attrindx
<= 7);
11797 cacheattrs
->attrs
= extract64(mair
, attrindx
* 8, 8);
11799 cacheattrs
->shareability
= extract32(attrs
, 6, 2);
11802 *phys_ptr
= descaddr
;
11803 *page_size_ptr
= page_size
;
11807 fi
->type
= fault_type
;
11809 /* Tag the error as S2 for failed S1 PTW at S2 or ordinary S2. */
11810 fi
->stage2
= fi
->s1ptw
|| (mmu_idx
== ARMMMUIdx_S2NS
);
11814 static inline void get_phys_addr_pmsav7_default(CPUARMState
*env
,
11816 int32_t address
, int *prot
)
11818 if (!arm_feature(env
, ARM_FEATURE_M
)) {
11819 *prot
= PAGE_READ
| PAGE_WRITE
;
11821 case 0xF0000000 ... 0xFFFFFFFF:
11822 if (regime_sctlr(env
, mmu_idx
) & SCTLR_V
) {
11823 /* hivecs execing is ok */
11824 *prot
|= PAGE_EXEC
;
11827 case 0x00000000 ... 0x7FFFFFFF:
11828 *prot
|= PAGE_EXEC
;
11832 /* Default system address map for M profile cores.
11833 * The architecture specifies which regions are execute-never;
11834 * at the MPU level no other checks are defined.
11837 case 0x00000000 ... 0x1fffffff: /* ROM */
11838 case 0x20000000 ... 0x3fffffff: /* SRAM */
11839 case 0x60000000 ... 0x7fffffff: /* RAM */
11840 case 0x80000000 ... 0x9fffffff: /* RAM */
11841 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
11843 case 0x40000000 ... 0x5fffffff: /* Peripheral */
11844 case 0xa0000000 ... 0xbfffffff: /* Device */
11845 case 0xc0000000 ... 0xdfffffff: /* Device */
11846 case 0xe0000000 ... 0xffffffff: /* System */
11847 *prot
= PAGE_READ
| PAGE_WRITE
;
11850 g_assert_not_reached();
11855 static bool pmsav7_use_background_region(ARMCPU
*cpu
,
11856 ARMMMUIdx mmu_idx
, bool is_user
)
11858 /* Return true if we should use the default memory map as a
11859 * "background" region if there are no hits against any MPU regions.
11861 CPUARMState
*env
= &cpu
->env
;
11867 if (arm_feature(env
, ARM_FEATURE_M
)) {
11868 return env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)]
11869 & R_V7M_MPU_CTRL_PRIVDEFENA_MASK
;
11871 return regime_sctlr(env
, mmu_idx
) & SCTLR_BR
;
11875 static inline bool m_is_ppb_region(CPUARMState
*env
, uint32_t address
)
11877 /* True if address is in the M profile PPB region 0xe0000000 - 0xe00fffff */
11878 return arm_feature(env
, ARM_FEATURE_M
) &&
11879 extract32(address
, 20, 12) == 0xe00;
11882 static inline bool m_is_system_region(CPUARMState
*env
, uint32_t address
)
11884 /* True if address is in the M profile system region
11885 * 0xe0000000 - 0xffffffff
11887 return arm_feature(env
, ARM_FEATURE_M
) && extract32(address
, 29, 3) == 0x7;
11890 static bool get_phys_addr_pmsav7(CPUARMState
*env
, uint32_t address
,
11891 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
11892 hwaddr
*phys_ptr
, int *prot
,
11893 target_ulong
*page_size
,
11894 ARMMMUFaultInfo
*fi
)
11896 ARMCPU
*cpu
= env_archcpu(env
);
11898 bool is_user
= regime_is_user(env
, mmu_idx
);
11900 *phys_ptr
= address
;
11901 *page_size
= TARGET_PAGE_SIZE
;
11904 if (regime_translation_disabled(env
, mmu_idx
) ||
11905 m_is_ppb_region(env
, address
)) {
11906 /* MPU disabled or M profile PPB access: use default memory map.
11907 * The other case which uses the default memory map in the
11908 * v7M ARM ARM pseudocode is exception vector reads from the vector
11909 * table. In QEMU those accesses are done in arm_v7m_load_vector(),
11910 * which always does a direct read using address_space_ldl(), rather
11911 * than going via this function, so we don't need to check that here.
11913 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
11914 } else { /* MPU enabled */
11915 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
11916 /* region search */
11917 uint32_t base
= env
->pmsav7
.drbar
[n
];
11918 uint32_t rsize
= extract32(env
->pmsav7
.drsr
[n
], 1, 5);
11920 bool srdis
= false;
11922 if (!(env
->pmsav7
.drsr
[n
] & 0x1)) {
11927 qemu_log_mask(LOG_GUEST_ERROR
,
11928 "DRSR[%d]: Rsize field cannot be 0\n", n
);
11932 rmask
= (1ull << rsize
) - 1;
11934 if (base
& rmask
) {
11935 qemu_log_mask(LOG_GUEST_ERROR
,
11936 "DRBAR[%d]: 0x%" PRIx32
" misaligned "
11937 "to DRSR region size, mask = 0x%" PRIx32
"\n",
11942 if (address
< base
|| address
> base
+ rmask
) {
11944 * Address not in this region. We must check whether the
11945 * region covers addresses in the same page as our address.
11946 * In that case we must not report a size that covers the
11947 * whole page for a subsequent hit against a different MPU
11948 * region or the background region, because it would result in
11949 * incorrect TLB hits for subsequent accesses to addresses that
11950 * are in this MPU region.
11952 if (ranges_overlap(base
, rmask
,
11953 address
& TARGET_PAGE_MASK
,
11954 TARGET_PAGE_SIZE
)) {
11960 /* Region matched */
11962 if (rsize
>= 8) { /* no subregions for regions < 256 bytes */
11964 uint32_t srdis_mask
;
11966 rsize
-= 3; /* sub region size (power of 2) */
11967 snd
= ((address
- base
) >> rsize
) & 0x7;
11968 srdis
= extract32(env
->pmsav7
.drsr
[n
], snd
+ 8, 1);
11970 srdis_mask
= srdis
? 0x3 : 0x0;
11971 for (i
= 2; i
<= 8 && rsize
< TARGET_PAGE_BITS
; i
*= 2) {
11972 /* This will check in groups of 2, 4 and then 8, whether
11973 * the subregion bits are consistent. rsize is incremented
11974 * back up to give the region size, considering consistent
11975 * adjacent subregions as one region. Stop testing if rsize
11976 * is already big enough for an entire QEMU page.
11978 int snd_rounded
= snd
& ~(i
- 1);
11979 uint32_t srdis_multi
= extract32(env
->pmsav7
.drsr
[n
],
11980 snd_rounded
+ 8, i
);
11981 if (srdis_mask
^ srdis_multi
) {
11984 srdis_mask
= (srdis_mask
<< i
) | srdis_mask
;
11991 if (rsize
< TARGET_PAGE_BITS
) {
11992 *page_size
= 1 << rsize
;
11997 if (n
== -1) { /* no hits */
11998 if (!pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
11999 /* background fault */
12000 fi
->type
= ARMFault_Background
;
12003 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
12004 } else { /* a MPU hit! */
12005 uint32_t ap
= extract32(env
->pmsav7
.dracr
[n
], 8, 3);
12006 uint32_t xn
= extract32(env
->pmsav7
.dracr
[n
], 12, 1);
12008 if (m_is_system_region(env
, address
)) {
12009 /* System space is always execute never */
12013 if (is_user
) { /* User mode AP bit decoding */
12018 break; /* no access */
12020 *prot
|= PAGE_WRITE
;
12024 *prot
|= PAGE_READ
| PAGE_EXEC
;
12027 /* for v7M, same as 6; for R profile a reserved value */
12028 if (arm_feature(env
, ARM_FEATURE_M
)) {
12029 *prot
|= PAGE_READ
| PAGE_EXEC
;
12034 qemu_log_mask(LOG_GUEST_ERROR
,
12035 "DRACR[%d]: Bad value for AP bits: 0x%"
12036 PRIx32
"\n", n
, ap
);
12038 } else { /* Priv. mode AP bits decoding */
12041 break; /* no access */
12045 *prot
|= PAGE_WRITE
;
12049 *prot
|= PAGE_READ
| PAGE_EXEC
;
12052 /* for v7M, same as 6; for R profile a reserved value */
12053 if (arm_feature(env
, ARM_FEATURE_M
)) {
12054 *prot
|= PAGE_READ
| PAGE_EXEC
;
12059 qemu_log_mask(LOG_GUEST_ERROR
,
12060 "DRACR[%d]: Bad value for AP bits: 0x%"
12061 PRIx32
"\n", n
, ap
);
12065 /* execute never */
12067 *prot
&= ~PAGE_EXEC
;
12072 fi
->type
= ARMFault_Permission
;
12074 return !(*prot
& (1 << access_type
));
12077 static bool v8m_is_sau_exempt(CPUARMState
*env
,
12078 uint32_t address
, MMUAccessType access_type
)
12080 /* The architecture specifies that certain address ranges are
12081 * exempt from v8M SAU/IDAU checks.
12084 (access_type
== MMU_INST_FETCH
&& m_is_system_region(env
, address
)) ||
12085 (address
>= 0xe0000000 && address
<= 0xe0002fff) ||
12086 (address
>= 0xe000e000 && address
<= 0xe000efff) ||
12087 (address
>= 0xe002e000 && address
<= 0xe002efff) ||
12088 (address
>= 0xe0040000 && address
<= 0xe0041fff) ||
12089 (address
>= 0xe00ff000 && address
<= 0xe00fffff);
12092 void v8m_security_lookup(CPUARMState
*env
, uint32_t address
,
12093 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
12094 V8M_SAttributes
*sattrs
)
12096 /* Look up the security attributes for this address. Compare the
12097 * pseudocode SecurityCheck() function.
12098 * We assume the caller has zero-initialized *sattrs.
12100 ARMCPU
*cpu
= env_archcpu(env
);
12102 bool idau_exempt
= false, idau_ns
= true, idau_nsc
= true;
12103 int idau_region
= IREGION_NOTVALID
;
12104 uint32_t addr_page_base
= address
& TARGET_PAGE_MASK
;
12105 uint32_t addr_page_limit
= addr_page_base
+ (TARGET_PAGE_SIZE
- 1);
12108 IDAUInterfaceClass
*iic
= IDAU_INTERFACE_GET_CLASS(cpu
->idau
);
12109 IDAUInterface
*ii
= IDAU_INTERFACE(cpu
->idau
);
12111 iic
->check(ii
, address
, &idau_region
, &idau_exempt
, &idau_ns
,
12115 if (access_type
== MMU_INST_FETCH
&& extract32(address
, 28, 4) == 0xf) {
12116 /* 0xf0000000..0xffffffff is always S for insn fetches */
12120 if (idau_exempt
|| v8m_is_sau_exempt(env
, address
, access_type
)) {
12121 sattrs
->ns
= !regime_is_secure(env
, mmu_idx
);
12125 if (idau_region
!= IREGION_NOTVALID
) {
12126 sattrs
->irvalid
= true;
12127 sattrs
->iregion
= idau_region
;
12130 switch (env
->sau
.ctrl
& 3) {
12131 case 0: /* SAU.ENABLE == 0, SAU.ALLNS == 0 */
12133 case 2: /* SAU.ENABLE == 0, SAU.ALLNS == 1 */
12136 default: /* SAU.ENABLE == 1 */
12137 for (r
= 0; r
< cpu
->sau_sregion
; r
++) {
12138 if (env
->sau
.rlar
[r
] & 1) {
12139 uint32_t base
= env
->sau
.rbar
[r
] & ~0x1f;
12140 uint32_t limit
= env
->sau
.rlar
[r
] | 0x1f;
12142 if (base
<= address
&& limit
>= address
) {
12143 if (base
> addr_page_base
|| limit
< addr_page_limit
) {
12144 sattrs
->subpage
= true;
12146 if (sattrs
->srvalid
) {
12147 /* If we hit in more than one region then we must report
12148 * as Secure, not NS-Callable, with no valid region
12151 sattrs
->ns
= false;
12152 sattrs
->nsc
= false;
12153 sattrs
->sregion
= 0;
12154 sattrs
->srvalid
= false;
12157 if (env
->sau
.rlar
[r
] & 2) {
12158 sattrs
->nsc
= true;
12162 sattrs
->srvalid
= true;
12163 sattrs
->sregion
= r
;
12167 * Address not in this region. We must check whether the
12168 * region covers addresses in the same page as our address.
12169 * In that case we must not report a size that covers the
12170 * whole page for a subsequent hit against a different MPU
12171 * region or the background region, because it would result
12172 * in incorrect TLB hits for subsequent accesses to
12173 * addresses that are in this MPU region.
12175 if (limit
>= base
&&
12176 ranges_overlap(base
, limit
- base
+ 1,
12178 TARGET_PAGE_SIZE
)) {
12179 sattrs
->subpage
= true;
12188 * The IDAU will override the SAU lookup results if it specifies
12189 * higher security than the SAU does.
12192 if (sattrs
->ns
|| (!idau_nsc
&& sattrs
->nsc
)) {
12193 sattrs
->ns
= false;
12194 sattrs
->nsc
= idau_nsc
;
12199 bool pmsav8_mpu_lookup(CPUARMState
*env
, uint32_t address
,
12200 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
12201 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
,
12202 int *prot
, bool *is_subpage
,
12203 ARMMMUFaultInfo
*fi
, uint32_t *mregion
)
12205 /* Perform a PMSAv8 MPU lookup (without also doing the SAU check
12206 * that a full phys-to-virt translation does).
12207 * mregion is (if not NULL) set to the region number which matched,
12208 * or -1 if no region number is returned (MPU off, address did not
12209 * hit a region, address hit in multiple regions).
12210 * We set is_subpage to true if the region hit doesn't cover the
12211 * entire TARGET_PAGE the address is within.
12213 ARMCPU
*cpu
= env_archcpu(env
);
12214 bool is_user
= regime_is_user(env
, mmu_idx
);
12215 uint32_t secure
= regime_is_secure(env
, mmu_idx
);
12217 int matchregion
= -1;
12219 uint32_t addr_page_base
= address
& TARGET_PAGE_MASK
;
12220 uint32_t addr_page_limit
= addr_page_base
+ (TARGET_PAGE_SIZE
- 1);
12222 *is_subpage
= false;
12223 *phys_ptr
= address
;
12229 /* Unlike the ARM ARM pseudocode, we don't need to check whether this
12230 * was an exception vector read from the vector table (which is always
12231 * done using the default system address map), because those accesses
12232 * are done in arm_v7m_load_vector(), which always does a direct
12233 * read using address_space_ldl(), rather than going via this function.
12235 if (regime_translation_disabled(env
, mmu_idx
)) { /* MPU disabled */
12237 } else if (m_is_ppb_region(env
, address
)) {
12240 if (pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
12244 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
12245 /* region search */
12246 /* Note that the base address is bits [31:5] from the register
12247 * with bits [4:0] all zeroes, but the limit address is bits
12248 * [31:5] from the register with bits [4:0] all ones.
12250 uint32_t base
= env
->pmsav8
.rbar
[secure
][n
] & ~0x1f;
12251 uint32_t limit
= env
->pmsav8
.rlar
[secure
][n
] | 0x1f;
12253 if (!(env
->pmsav8
.rlar
[secure
][n
] & 0x1)) {
12254 /* Region disabled */
12258 if (address
< base
|| address
> limit
) {
12260 * Address not in this region. We must check whether the
12261 * region covers addresses in the same page as our address.
12262 * In that case we must not report a size that covers the
12263 * whole page for a subsequent hit against a different MPU
12264 * region or the background region, because it would result in
12265 * incorrect TLB hits for subsequent accesses to addresses that
12266 * are in this MPU region.
12268 if (limit
>= base
&&
12269 ranges_overlap(base
, limit
- base
+ 1,
12271 TARGET_PAGE_SIZE
)) {
12272 *is_subpage
= true;
12277 if (base
> addr_page_base
|| limit
< addr_page_limit
) {
12278 *is_subpage
= true;
12281 if (matchregion
!= -1) {
12282 /* Multiple regions match -- always a failure (unlike
12283 * PMSAv7 where highest-numbered-region wins)
12285 fi
->type
= ARMFault_Permission
;
12296 /* background fault */
12297 fi
->type
= ARMFault_Background
;
12301 if (matchregion
== -1) {
12302 /* hit using the background region */
12303 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
12305 uint32_t ap
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 1, 2);
12306 uint32_t xn
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 0, 1);
12308 if (m_is_system_region(env
, address
)) {
12309 /* System space is always execute never */
12313 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
);
12314 if (*prot
&& !xn
) {
12315 *prot
|= PAGE_EXEC
;
12317 /* We don't need to look the attribute up in the MAIR0/MAIR1
12318 * registers because that only tells us about cacheability.
12321 *mregion
= matchregion
;
12325 fi
->type
= ARMFault_Permission
;
12327 return !(*prot
& (1 << access_type
));
12331 static bool get_phys_addr_pmsav8(CPUARMState
*env
, uint32_t address
,
12332 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
12333 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
,
12334 int *prot
, target_ulong
*page_size
,
12335 ARMMMUFaultInfo
*fi
)
12337 uint32_t secure
= regime_is_secure(env
, mmu_idx
);
12338 V8M_SAttributes sattrs
= {};
12340 bool mpu_is_subpage
;
12342 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
12343 v8m_security_lookup(env
, address
, access_type
, mmu_idx
, &sattrs
);
12344 if (access_type
== MMU_INST_FETCH
) {
12345 /* Instruction fetches always use the MMU bank and the
12346 * transaction attribute determined by the fetch address,
12347 * regardless of CPU state. This is painful for QEMU
12348 * to handle, because it would mean we need to encode
12349 * into the mmu_idx not just the (user, negpri) information
12350 * for the current security state but also that for the
12351 * other security state, which would balloon the number
12352 * of mmu_idx values needed alarmingly.
12353 * Fortunately we can avoid this because it's not actually
12354 * possible to arbitrarily execute code from memory with
12355 * the wrong security attribute: it will always generate
12356 * an exception of some kind or another, apart from the
12357 * special case of an NS CPU executing an SG instruction
12358 * in S&NSC memory. So we always just fail the translation
12359 * here and sort things out in the exception handler
12360 * (including possibly emulating an SG instruction).
12362 if (sattrs
.ns
!= !secure
) {
12364 fi
->type
= ARMFault_QEMU_NSCExec
;
12366 fi
->type
= ARMFault_QEMU_SFault
;
12368 *page_size
= sattrs
.subpage
? 1 : TARGET_PAGE_SIZE
;
12369 *phys_ptr
= address
;
12374 /* For data accesses we always use the MMU bank indicated
12375 * by the current CPU state, but the security attributes
12376 * might downgrade a secure access to nonsecure.
12379 txattrs
->secure
= false;
12380 } else if (!secure
) {
12381 /* NS access to S memory must fault.
12382 * Architecturally we should first check whether the
12383 * MPU information for this address indicates that we
12384 * are doing an unaligned access to Device memory, which
12385 * should generate a UsageFault instead. QEMU does not
12386 * currently check for that kind of unaligned access though.
12387 * If we added it we would need to do so as a special case
12388 * for M_FAKE_FSR_SFAULT in arm_v7m_cpu_do_interrupt().
12390 fi
->type
= ARMFault_QEMU_SFault
;
12391 *page_size
= sattrs
.subpage
? 1 : TARGET_PAGE_SIZE
;
12392 *phys_ptr
= address
;
12399 ret
= pmsav8_mpu_lookup(env
, address
, access_type
, mmu_idx
, phys_ptr
,
12400 txattrs
, prot
, &mpu_is_subpage
, fi
, NULL
);
12401 *page_size
= sattrs
.subpage
|| mpu_is_subpage
? 1 : TARGET_PAGE_SIZE
;
12405 static bool get_phys_addr_pmsav5(CPUARMState
*env
, uint32_t address
,
12406 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
12407 hwaddr
*phys_ptr
, int *prot
,
12408 ARMMMUFaultInfo
*fi
)
12413 bool is_user
= regime_is_user(env
, mmu_idx
);
12415 if (regime_translation_disabled(env
, mmu_idx
)) {
12416 /* MPU disabled. */
12417 *phys_ptr
= address
;
12418 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
12422 *phys_ptr
= address
;
12423 for (n
= 7; n
>= 0; n
--) {
12424 base
= env
->cp15
.c6_region
[n
];
12425 if ((base
& 1) == 0) {
12428 mask
= 1 << ((base
>> 1) & 0x1f);
12429 /* Keep this shift separate from the above to avoid an
12430 (undefined) << 32. */
12431 mask
= (mask
<< 1) - 1;
12432 if (((base
^ address
) & ~mask
) == 0) {
12437 fi
->type
= ARMFault_Background
;
12441 if (access_type
== MMU_INST_FETCH
) {
12442 mask
= env
->cp15
.pmsav5_insn_ap
;
12444 mask
= env
->cp15
.pmsav5_data_ap
;
12446 mask
= (mask
>> (n
* 4)) & 0xf;
12449 fi
->type
= ARMFault_Permission
;
12454 fi
->type
= ARMFault_Permission
;
12458 *prot
= PAGE_READ
| PAGE_WRITE
;
12463 *prot
|= PAGE_WRITE
;
12467 *prot
= PAGE_READ
| PAGE_WRITE
;
12471 fi
->type
= ARMFault_Permission
;
12481 /* Bad permission. */
12482 fi
->type
= ARMFault_Permission
;
12486 *prot
|= PAGE_EXEC
;
12490 /* Combine either inner or outer cacheability attributes for normal
12491 * memory, according to table D4-42 and pseudocode procedure
12492 * CombineS1S2AttrHints() of ARM DDI 0487B.b (the ARMv8 ARM).
12494 * NB: only stage 1 includes allocation hints (RW bits), leading to
12497 static uint8_t combine_cacheattr_nibble(uint8_t s1
, uint8_t s2
)
12499 if (s1
== 4 || s2
== 4) {
12500 /* non-cacheable has precedence */
12502 } else if (extract32(s1
, 2, 2) == 0 || extract32(s1
, 2, 2) == 2) {
12503 /* stage 1 write-through takes precedence */
12505 } else if (extract32(s2
, 2, 2) == 2) {
12506 /* stage 2 write-through takes precedence, but the allocation hint
12507 * is still taken from stage 1
12509 return (2 << 2) | extract32(s1
, 0, 2);
12510 } else { /* write-back */
12515 /* Combine S1 and S2 cacheability/shareability attributes, per D4.5.4
12516 * and CombineS1S2Desc()
12518 * @s1: Attributes from stage 1 walk
12519 * @s2: Attributes from stage 2 walk
12521 static ARMCacheAttrs
combine_cacheattrs(ARMCacheAttrs s1
, ARMCacheAttrs s2
)
12523 uint8_t s1lo
= extract32(s1
.attrs
, 0, 4), s2lo
= extract32(s2
.attrs
, 0, 4);
12524 uint8_t s1hi
= extract32(s1
.attrs
, 4, 4), s2hi
= extract32(s2
.attrs
, 4, 4);
12527 /* Combine shareability attributes (table D4-43) */
12528 if (s1
.shareability
== 2 || s2
.shareability
== 2) {
12529 /* if either are outer-shareable, the result is outer-shareable */
12530 ret
.shareability
= 2;
12531 } else if (s1
.shareability
== 3 || s2
.shareability
== 3) {
12532 /* if either are inner-shareable, the result is inner-shareable */
12533 ret
.shareability
= 3;
12535 /* both non-shareable */
12536 ret
.shareability
= 0;
12539 /* Combine memory type and cacheability attributes */
12540 if (s1hi
== 0 || s2hi
== 0) {
12541 /* Device has precedence over normal */
12542 if (s1lo
== 0 || s2lo
== 0) {
12543 /* nGnRnE has precedence over anything */
12545 } else if (s1lo
== 4 || s2lo
== 4) {
12546 /* non-Reordering has precedence over Reordering */
12547 ret
.attrs
= 4; /* nGnRE */
12548 } else if (s1lo
== 8 || s2lo
== 8) {
12549 /* non-Gathering has precedence over Gathering */
12550 ret
.attrs
= 8; /* nGRE */
12552 ret
.attrs
= 0xc; /* GRE */
12555 /* Any location for which the resultant memory type is any
12556 * type of Device memory is always treated as Outer Shareable.
12558 ret
.shareability
= 2;
12559 } else { /* Normal memory */
12560 /* Outer/inner cacheability combine independently */
12561 ret
.attrs
= combine_cacheattr_nibble(s1hi
, s2hi
) << 4
12562 | combine_cacheattr_nibble(s1lo
, s2lo
);
12564 if (ret
.attrs
== 0x44) {
12565 /* Any location for which the resultant memory type is Normal
12566 * Inner Non-cacheable, Outer Non-cacheable is always treated
12567 * as Outer Shareable.
12569 ret
.shareability
= 2;
12577 /* get_phys_addr - get the physical address for this virtual address
12579 * Find the physical address corresponding to the given virtual address,
12580 * by doing a translation table walk on MMU based systems or using the
12581 * MPU state on MPU based systems.
12583 * Returns false if the translation was successful. Otherwise, phys_ptr, attrs,
12584 * prot and page_size may not be filled in, and the populated fsr value provides
12585 * information on why the translation aborted, in the format of a
12586 * DFSR/IFSR fault register, with the following caveats:
12587 * * we honour the short vs long DFSR format differences.
12588 * * the WnR bit is never set (the caller must do this).
12589 * * for PSMAv5 based systems we don't bother to return a full FSR format
12592 * @env: CPUARMState
12593 * @address: virtual address to get physical address for
12594 * @access_type: 0 for read, 1 for write, 2 for execute
12595 * @mmu_idx: MMU index indicating required translation regime
12596 * @phys_ptr: set to the physical address corresponding to the virtual address
12597 * @attrs: set to the memory transaction attributes to use
12598 * @prot: set to the permissions for the page containing phys_ptr
12599 * @page_size: set to the size of the page containing phys_ptr
12600 * @fi: set to fault info if the translation fails
12601 * @cacheattrs: (if non-NULL) set to the cacheability/shareability attributes
12603 bool get_phys_addr(CPUARMState
*env
, target_ulong address
,
12604 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
12605 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
12606 target_ulong
*page_size
,
12607 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
12609 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
12610 /* Call ourselves recursively to do the stage 1 and then stage 2
12613 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
12617 ARMCacheAttrs cacheattrs2
= {};
12619 ret
= get_phys_addr(env
, address
, access_type
,
12620 stage_1_mmu_idx(mmu_idx
), &ipa
, attrs
,
12621 prot
, page_size
, fi
, cacheattrs
);
12623 /* If S1 fails or S2 is disabled, return early. */
12624 if (ret
|| regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
12629 /* S1 is done. Now do S2 translation. */
12630 ret
= get_phys_addr_lpae(env
, ipa
, access_type
, ARMMMUIdx_S2NS
,
12631 phys_ptr
, attrs
, &s2_prot
,
12633 cacheattrs
!= NULL
? &cacheattrs2
: NULL
);
12635 /* Combine the S1 and S2 perms. */
12638 /* Combine the S1 and S2 cache attributes, if needed */
12639 if (!ret
&& cacheattrs
!= NULL
) {
12640 if (env
->cp15
.hcr_el2
& HCR_DC
) {
12642 * HCR.DC forces the first stage attributes to
12643 * Normal Non-Shareable,
12644 * Inner Write-Back Read-Allocate Write-Allocate,
12645 * Outer Write-Back Read-Allocate Write-Allocate.
12647 cacheattrs
->attrs
= 0xff;
12648 cacheattrs
->shareability
= 0;
12650 *cacheattrs
= combine_cacheattrs(*cacheattrs
, cacheattrs2
);
12656 * For non-EL2 CPUs a stage1+stage2 translation is just stage 1.
12658 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
12662 /* The page table entries may downgrade secure to non-secure, but
12663 * cannot upgrade an non-secure translation regime's attributes
12666 attrs
->secure
= regime_is_secure(env
, mmu_idx
);
12667 attrs
->user
= regime_is_user(env
, mmu_idx
);
12669 /* Fast Context Switch Extension. This doesn't exist at all in v8.
12670 * In v7 and earlier it affects all stage 1 translations.
12672 if (address
< 0x02000000 && mmu_idx
!= ARMMMUIdx_S2NS
12673 && !arm_feature(env
, ARM_FEATURE_V8
)) {
12674 if (regime_el(env
, mmu_idx
) == 3) {
12675 address
+= env
->cp15
.fcseidr_s
;
12677 address
+= env
->cp15
.fcseidr_ns
;
12681 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
12683 *page_size
= TARGET_PAGE_SIZE
;
12685 if (arm_feature(env
, ARM_FEATURE_V8
)) {
12687 ret
= get_phys_addr_pmsav8(env
, address
, access_type
, mmu_idx
,
12688 phys_ptr
, attrs
, prot
, page_size
, fi
);
12689 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
12691 ret
= get_phys_addr_pmsav7(env
, address
, access_type
, mmu_idx
,
12692 phys_ptr
, prot
, page_size
, fi
);
12695 ret
= get_phys_addr_pmsav5(env
, address
, access_type
, mmu_idx
,
12696 phys_ptr
, prot
, fi
);
12698 qemu_log_mask(CPU_LOG_MMU
, "PMSA MPU lookup for %s at 0x%08" PRIx32
12699 " mmu_idx %u -> %s (prot %c%c%c)\n",
12700 access_type
== MMU_DATA_LOAD
? "reading" :
12701 (access_type
== MMU_DATA_STORE
? "writing" : "execute"),
12702 (uint32_t)address
, mmu_idx
,
12703 ret
? "Miss" : "Hit",
12704 *prot
& PAGE_READ
? 'r' : '-',
12705 *prot
& PAGE_WRITE
? 'w' : '-',
12706 *prot
& PAGE_EXEC
? 'x' : '-');
12711 /* Definitely a real MMU, not an MPU */
12713 if (regime_translation_disabled(env
, mmu_idx
)) {
12714 /* MMU disabled. */
12715 *phys_ptr
= address
;
12716 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
12717 *page_size
= TARGET_PAGE_SIZE
;
12721 if (regime_using_lpae_format(env
, mmu_idx
)) {
12722 return get_phys_addr_lpae(env
, address
, access_type
, mmu_idx
,
12723 phys_ptr
, attrs
, prot
, page_size
,
12725 } else if (regime_sctlr(env
, mmu_idx
) & SCTLR_XP
) {
12726 return get_phys_addr_v6(env
, address
, access_type
, mmu_idx
,
12727 phys_ptr
, attrs
, prot
, page_size
, fi
);
12729 return get_phys_addr_v5(env
, address
, access_type
, mmu_idx
,
12730 phys_ptr
, prot
, page_size
, fi
);
12734 hwaddr
arm_cpu_get_phys_page_attrs_debug(CPUState
*cs
, vaddr addr
,
12737 ARMCPU
*cpu
= ARM_CPU(cs
);
12738 CPUARMState
*env
= &cpu
->env
;
12740 target_ulong page_size
;
12743 ARMMMUFaultInfo fi
= {};
12744 ARMMMUIdx mmu_idx
= arm_mmu_idx(env
);
12746 *attrs
= (MemTxAttrs
) {};
12748 ret
= get_phys_addr(env
, addr
, 0, mmu_idx
, &phys_addr
,
12749 attrs
, &prot
, &page_size
, &fi
, NULL
);
12757 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
12760 unsigned el
= arm_current_el(env
);
12762 /* First handle registers which unprivileged can read */
12765 case 0 ... 7: /* xPSR sub-fields */
12767 if ((reg
& 1) && el
) {
12768 mask
|= XPSR_EXCP
; /* IPSR (unpriv. reads as zero) */
12771 mask
|= XPSR_NZCV
| XPSR_Q
; /* APSR */
12772 if (arm_feature(env
, ARM_FEATURE_THUMB_DSP
)) {
12776 /* EPSR reads as zero */
12777 return xpsr_read(env
) & mask
;
12779 case 20: /* CONTROL */
12781 uint32_t value
= env
->v7m
.control
[env
->v7m
.secure
];
12782 if (!env
->v7m
.secure
) {
12783 /* SFPA is RAZ/WI from NS; FPCA is stored in the M_REG_S bank */
12784 value
|= env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
;
12788 case 0x94: /* CONTROL_NS */
12790 * We have to handle this here because unprivileged Secure code
12791 * can read the NS CONTROL register.
12793 if (!env
->v7m
.secure
) {
12796 return env
->v7m
.control
[M_REG_NS
] |
12797 (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
);
12801 return 0; /* unprivileged reads others as zero */
12804 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
12806 case 0x88: /* MSP_NS */
12807 if (!env
->v7m
.secure
) {
12810 return env
->v7m
.other_ss_msp
;
12811 case 0x89: /* PSP_NS */
12812 if (!env
->v7m
.secure
) {
12815 return env
->v7m
.other_ss_psp
;
12816 case 0x8a: /* MSPLIM_NS */
12817 if (!env
->v7m
.secure
) {
12820 return env
->v7m
.msplim
[M_REG_NS
];
12821 case 0x8b: /* PSPLIM_NS */
12822 if (!env
->v7m
.secure
) {
12825 return env
->v7m
.psplim
[M_REG_NS
];
12826 case 0x90: /* PRIMASK_NS */
12827 if (!env
->v7m
.secure
) {
12830 return env
->v7m
.primask
[M_REG_NS
];
12831 case 0x91: /* BASEPRI_NS */
12832 if (!env
->v7m
.secure
) {
12835 return env
->v7m
.basepri
[M_REG_NS
];
12836 case 0x93: /* FAULTMASK_NS */
12837 if (!env
->v7m
.secure
) {
12840 return env
->v7m
.faultmask
[M_REG_NS
];
12841 case 0x98: /* SP_NS */
12844 * This gives the non-secure SP selected based on whether we're
12845 * currently in handler mode or not, using the NS CONTROL.SPSEL.
12847 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
12849 if (!env
->v7m
.secure
) {
12852 if (!arm_v7m_is_handler_mode(env
) && spsel
) {
12853 return env
->v7m
.other_ss_psp
;
12855 return env
->v7m
.other_ss_msp
;
12865 return v7m_using_psp(env
) ? env
->v7m
.other_sp
: env
->regs
[13];
12867 return v7m_using_psp(env
) ? env
->regs
[13] : env
->v7m
.other_sp
;
12868 case 10: /* MSPLIM */
12869 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
12872 return env
->v7m
.msplim
[env
->v7m
.secure
];
12873 case 11: /* PSPLIM */
12874 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
12877 return env
->v7m
.psplim
[env
->v7m
.secure
];
12878 case 16: /* PRIMASK */
12879 return env
->v7m
.primask
[env
->v7m
.secure
];
12880 case 17: /* BASEPRI */
12881 case 18: /* BASEPRI_MAX */
12882 return env
->v7m
.basepri
[env
->v7m
.secure
];
12883 case 19: /* FAULTMASK */
12884 return env
->v7m
.faultmask
[env
->v7m
.secure
];
12887 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to read unknown special"
12888 " register %d\n", reg
);
12893 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t maskreg
, uint32_t val
)
12896 * We're passed bits [11..0] of the instruction; extract
12897 * SYSm and the mask bits.
12898 * Invalid combinations of SYSm and mask are UNPREDICTABLE;
12899 * we choose to treat them as if the mask bits were valid.
12900 * NB that the pseudocode 'mask' variable is bits [11..10],
12901 * whereas ours is [11..8].
12903 uint32_t mask
= extract32(maskreg
, 8, 4);
12904 uint32_t reg
= extract32(maskreg
, 0, 8);
12905 int cur_el
= arm_current_el(env
);
12907 if (cur_el
== 0 && reg
> 7 && reg
!= 20) {
12909 * only xPSR sub-fields and CONTROL.SFPA may be written by
12910 * unprivileged code
12915 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
12917 case 0x88: /* MSP_NS */
12918 if (!env
->v7m
.secure
) {
12921 env
->v7m
.other_ss_msp
= val
;
12923 case 0x89: /* PSP_NS */
12924 if (!env
->v7m
.secure
) {
12927 env
->v7m
.other_ss_psp
= val
;
12929 case 0x8a: /* MSPLIM_NS */
12930 if (!env
->v7m
.secure
) {
12933 env
->v7m
.msplim
[M_REG_NS
] = val
& ~7;
12935 case 0x8b: /* PSPLIM_NS */
12936 if (!env
->v7m
.secure
) {
12939 env
->v7m
.psplim
[M_REG_NS
] = val
& ~7;
12941 case 0x90: /* PRIMASK_NS */
12942 if (!env
->v7m
.secure
) {
12945 env
->v7m
.primask
[M_REG_NS
] = val
& 1;
12947 case 0x91: /* BASEPRI_NS */
12948 if (!env
->v7m
.secure
|| !arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
12951 env
->v7m
.basepri
[M_REG_NS
] = val
& 0xff;
12953 case 0x93: /* FAULTMASK_NS */
12954 if (!env
->v7m
.secure
|| !arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
12957 env
->v7m
.faultmask
[M_REG_NS
] = val
& 1;
12959 case 0x94: /* CONTROL_NS */
12960 if (!env
->v7m
.secure
) {
12963 write_v7m_control_spsel_for_secstate(env
,
12964 val
& R_V7M_CONTROL_SPSEL_MASK
,
12966 if (arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
12967 env
->v7m
.control
[M_REG_NS
] &= ~R_V7M_CONTROL_NPRIV_MASK
;
12968 env
->v7m
.control
[M_REG_NS
] |= val
& R_V7M_CONTROL_NPRIV_MASK
;
12971 * SFPA is RAZ/WI from NS. FPCA is RO if NSACR.CP10 == 0,
12972 * RES0 if the FPU is not present, and is stored in the S bank
12974 if (arm_feature(env
, ARM_FEATURE_VFP
) &&
12975 extract32(env
->v7m
.nsacr
, 10, 1)) {
12976 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_FPCA_MASK
;
12977 env
->v7m
.control
[M_REG_S
] |= val
& R_V7M_CONTROL_FPCA_MASK
;
12980 case 0x98: /* SP_NS */
12983 * This gives the non-secure SP selected based on whether we're
12984 * currently in handler mode or not, using the NS CONTROL.SPSEL.
12986 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
12987 bool is_psp
= !arm_v7m_is_handler_mode(env
) && spsel
;
12990 if (!env
->v7m
.secure
) {
12994 limit
= is_psp
? env
->v7m
.psplim
[false] : env
->v7m
.msplim
[false];
12997 CPUState
*cs
= env_cpu(env
);
12999 cpu_restore_state(cs
, GETPC(), true);
13000 raise_exception(env
, EXCP_STKOF
, 0, 1);
13004 env
->v7m
.other_ss_psp
= val
;
13006 env
->v7m
.other_ss_msp
= val
;
13016 case 0 ... 7: /* xPSR sub-fields */
13017 /* only APSR is actually writable */
13019 uint32_t apsrmask
= 0;
13022 apsrmask
|= XPSR_NZCV
| XPSR_Q
;
13024 if ((mask
& 4) && arm_feature(env
, ARM_FEATURE_THUMB_DSP
)) {
13025 apsrmask
|= XPSR_GE
;
13027 xpsr_write(env
, val
, apsrmask
);
13031 if (v7m_using_psp(env
)) {
13032 env
->v7m
.other_sp
= val
;
13034 env
->regs
[13] = val
;
13038 if (v7m_using_psp(env
)) {
13039 env
->regs
[13] = val
;
13041 env
->v7m
.other_sp
= val
;
13044 case 10: /* MSPLIM */
13045 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
13048 env
->v7m
.msplim
[env
->v7m
.secure
] = val
& ~7;
13050 case 11: /* PSPLIM */
13051 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
13054 env
->v7m
.psplim
[env
->v7m
.secure
] = val
& ~7;
13056 case 16: /* PRIMASK */
13057 env
->v7m
.primask
[env
->v7m
.secure
] = val
& 1;
13059 case 17: /* BASEPRI */
13060 if (!arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
13063 env
->v7m
.basepri
[env
->v7m
.secure
] = val
& 0xff;
13065 case 18: /* BASEPRI_MAX */
13066 if (!arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
13070 if (val
!= 0 && (val
< env
->v7m
.basepri
[env
->v7m
.secure
]
13071 || env
->v7m
.basepri
[env
->v7m
.secure
] == 0)) {
13072 env
->v7m
.basepri
[env
->v7m
.secure
] = val
;
13075 case 19: /* FAULTMASK */
13076 if (!arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
13079 env
->v7m
.faultmask
[env
->v7m
.secure
] = val
& 1;
13081 case 20: /* CONTROL */
13083 * Writing to the SPSEL bit only has an effect if we are in
13084 * thread mode; other bits can be updated by any privileged code.
13085 * write_v7m_control_spsel() deals with updating the SPSEL bit in
13086 * env->v7m.control, so we only need update the others.
13087 * For v7M, we must just ignore explicit writes to SPSEL in handler
13088 * mode; for v8M the write is permitted but will have no effect.
13089 * All these bits are writes-ignored from non-privileged code,
13092 if (cur_el
> 0 && (arm_feature(env
, ARM_FEATURE_V8
) ||
13093 !arm_v7m_is_handler_mode(env
))) {
13094 write_v7m_control_spsel(env
, (val
& R_V7M_CONTROL_SPSEL_MASK
) != 0);
13096 if (cur_el
> 0 && arm_feature(env
, ARM_FEATURE_M_MAIN
)) {
13097 env
->v7m
.control
[env
->v7m
.secure
] &= ~R_V7M_CONTROL_NPRIV_MASK
;
13098 env
->v7m
.control
[env
->v7m
.secure
] |= val
& R_V7M_CONTROL_NPRIV_MASK
;
13100 if (arm_feature(env
, ARM_FEATURE_VFP
)) {
13102 * SFPA is RAZ/WI from NS or if no FPU.
13103 * FPCA is RO if NSACR.CP10 == 0, RES0 if the FPU is not present.
13104 * Both are stored in the S bank.
13106 if (env
->v7m
.secure
) {
13107 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
13108 env
->v7m
.control
[M_REG_S
] |= val
& R_V7M_CONTROL_SFPA_MASK
;
13111 (env
->v7m
.secure
|| !arm_feature(env
, ARM_FEATURE_M_SECURITY
) ||
13112 extract32(env
->v7m
.nsacr
, 10, 1))) {
13113 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_FPCA_MASK
;
13114 env
->v7m
.control
[M_REG_S
] |= val
& R_V7M_CONTROL_FPCA_MASK
;
13120 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to write unknown special"
13121 " register %d\n", reg
);
13126 uint32_t HELPER(v7m_tt
)(CPUARMState
*env
, uint32_t addr
, uint32_t op
)
13128 /* Implement the TT instruction. op is bits [7:6] of the insn. */
13129 bool forceunpriv
= op
& 1;
13131 V8M_SAttributes sattrs
= {};
13133 bool r
, rw
, nsr
, nsrw
, mrvalid
;
13135 ARMMMUFaultInfo fi
= {};
13136 MemTxAttrs attrs
= {};
13141 bool targetsec
= env
->v7m
.secure
;
13145 * Work out what the security state and privilege level we're
13146 * interested in is...
13149 targetsec
= !targetsec
;
13153 targetpriv
= false;
13155 targetpriv
= arm_v7m_is_handler_mode(env
) ||
13156 !(env
->v7m
.control
[targetsec
] & R_V7M_CONTROL_NPRIV_MASK
);
13159 /* ...and then figure out which MMU index this is */
13160 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, targetsec
, targetpriv
);
13163 * We know that the MPU and SAU don't care about the access type
13164 * for our purposes beyond that we don't want to claim to be
13165 * an insn fetch, so we arbitrarily call this a read.
13169 * MPU region info only available for privileged or if
13170 * inspecting the other MPU state.
13172 if (arm_current_el(env
) != 0 || alt
) {
13173 /* We can ignore the return value as prot is always set */
13174 pmsav8_mpu_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
,
13175 &phys_addr
, &attrs
, &prot
, &is_subpage
,
13177 if (mregion
== -1) {
13183 r
= prot
& PAGE_READ
;
13184 rw
= prot
& PAGE_WRITE
;
13192 if (env
->v7m
.secure
) {
13193 v8m_security_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &sattrs
);
13194 nsr
= sattrs
.ns
&& r
;
13195 nsrw
= sattrs
.ns
&& rw
;
13202 tt_resp
= (sattrs
.iregion
<< 24) |
13203 (sattrs
.irvalid
<< 23) |
13204 ((!sattrs
.ns
) << 22) |
13209 (sattrs
.srvalid
<< 17) |
13211 (sattrs
.sregion
<< 8) |
13219 /* Note that signed overflow is undefined in C. The following routines are
13220 careful to use unsigned types where modulo arithmetic is required.
13221 Failure to do so _will_ break on newer gcc. */
13223 /* Signed saturating arithmetic. */
13225 /* Perform 16-bit signed saturating addition. */
13226 static inline uint16_t add16_sat(uint16_t a
, uint16_t b
)
13231 if (((res
^ a
) & 0x8000) && !((a
^ b
) & 0x8000)) {
13240 /* Perform 8-bit signed saturating addition. */
13241 static inline uint8_t add8_sat(uint8_t a
, uint8_t b
)
13246 if (((res
^ a
) & 0x80) && !((a
^ b
) & 0x80)) {
13255 /* Perform 16-bit signed saturating subtraction. */
13256 static inline uint16_t sub16_sat(uint16_t a
, uint16_t b
)
13261 if (((res
^ a
) & 0x8000) && ((a
^ b
) & 0x8000)) {
13270 /* Perform 8-bit signed saturating subtraction. */
13271 static inline uint8_t sub8_sat(uint8_t a
, uint8_t b
)
13276 if (((res
^ a
) & 0x80) && ((a
^ b
) & 0x80)) {
13285 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
13286 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
13287 #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
13288 #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
13291 #include "op_addsub.h"
13293 /* Unsigned saturating arithmetic. */
13294 static inline uint16_t add16_usat(uint16_t a
, uint16_t b
)
13303 static inline uint16_t sub16_usat(uint16_t a
, uint16_t b
)
13311 static inline uint8_t add8_usat(uint8_t a
, uint8_t b
)
13320 static inline uint8_t sub8_usat(uint8_t a
, uint8_t b
)
13328 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
13329 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
13330 #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
13331 #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
13334 #include "op_addsub.h"
13336 /* Signed modulo arithmetic. */
13337 #define SARITH16(a, b, n, op) do { \
13339 sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
13340 RESULT(sum, n, 16); \
13342 ge |= 3 << (n * 2); \
13345 #define SARITH8(a, b, n, op) do { \
13347 sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
13348 RESULT(sum, n, 8); \
13354 #define ADD16(a, b, n) SARITH16(a, b, n, +)
13355 #define SUB16(a, b, n) SARITH16(a, b, n, -)
13356 #define ADD8(a, b, n) SARITH8(a, b, n, +)
13357 #define SUB8(a, b, n) SARITH8(a, b, n, -)
13361 #include "op_addsub.h"
13363 /* Unsigned modulo arithmetic. */
13364 #define ADD16(a, b, n) do { \
13366 sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
13367 RESULT(sum, n, 16); \
13368 if ((sum >> 16) == 1) \
13369 ge |= 3 << (n * 2); \
13372 #define ADD8(a, b, n) do { \
13374 sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
13375 RESULT(sum, n, 8); \
13376 if ((sum >> 8) == 1) \
13380 #define SUB16(a, b, n) do { \
13382 sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
13383 RESULT(sum, n, 16); \
13384 if ((sum >> 16) == 0) \
13385 ge |= 3 << (n * 2); \
13388 #define SUB8(a, b, n) do { \
13390 sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
13391 RESULT(sum, n, 8); \
13392 if ((sum >> 8) == 0) \
13399 #include "op_addsub.h"
13401 /* Halved signed arithmetic. */
13402 #define ADD16(a, b, n) \
13403 RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
13404 #define SUB16(a, b, n) \
13405 RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
13406 #define ADD8(a, b, n) \
13407 RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
13408 #define SUB8(a, b, n) \
13409 RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
13412 #include "op_addsub.h"
13414 /* Halved unsigned arithmetic. */
13415 #define ADD16(a, b, n) \
13416 RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
13417 #define SUB16(a, b, n) \
13418 RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
13419 #define ADD8(a, b, n) \
13420 RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
13421 #define SUB8(a, b, n) \
13422 RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
13425 #include "op_addsub.h"
13427 static inline uint8_t do_usad(uint8_t a
, uint8_t b
)
13435 /* Unsigned sum of absolute byte differences. */
13436 uint32_t HELPER(usad8
)(uint32_t a
, uint32_t b
)
13439 sum
= do_usad(a
, b
);
13440 sum
+= do_usad(a
>> 8, b
>> 8);
13441 sum
+= do_usad(a
>> 16, b
>>16);
13442 sum
+= do_usad(a
>> 24, b
>> 24);
13446 /* For ARMv6 SEL instruction. */
13447 uint32_t HELPER(sel_flags
)(uint32_t flags
, uint32_t a
, uint32_t b
)
13459 mask
|= 0xff000000;
13460 return (a
& mask
) | (b
& ~mask
);
13464 * The upper bytes of val (above the number specified by 'bytes') must have
13465 * been zeroed out by the caller.
13467 uint32_t HELPER(crc32
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
13471 stl_le_p(buf
, val
);
13473 /* zlib crc32 converts the accumulator and output to one's complement. */
13474 return crc32(acc
^ 0xffffffff, buf
, bytes
) ^ 0xffffffff;
13477 uint32_t HELPER(crc32c
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
13481 stl_le_p(buf
, val
);
13483 /* Linux crc32c converts the output to one's complement. */
13484 return crc32c(acc
, buf
, bytes
) ^ 0xffffffff;
13487 /* Return the exception level to which FP-disabled exceptions should
13488 * be taken, or 0 if FP is enabled.
13490 int fp_exception_el(CPUARMState
*env
, int cur_el
)
13492 #ifndef CONFIG_USER_ONLY
13495 /* CPACR and the CPTR registers don't exist before v6, so FP is
13496 * always accessible
13498 if (!arm_feature(env
, ARM_FEATURE_V6
)) {
13502 if (arm_feature(env
, ARM_FEATURE_M
)) {
13503 /* CPACR can cause a NOCP UsageFault taken to current security state */
13504 if (!v7m_cpacr_pass(env
, env
->v7m
.secure
, cur_el
!= 0)) {
13508 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
) && !env
->v7m
.secure
) {
13509 if (!extract32(env
->v7m
.nsacr
, 10, 1)) {
13510 /* FP insns cause a NOCP UsageFault taken to Secure */
13518 /* The CPACR controls traps to EL1, or PL1 if we're 32 bit:
13519 * 0, 2 : trap EL0 and EL1/PL1 accesses
13520 * 1 : trap only EL0 accesses
13521 * 3 : trap no accesses
13523 fpen
= extract32(env
->cp15
.cpacr_el1
, 20, 2);
13527 if (cur_el
== 0 || cur_el
== 1) {
13528 /* Trap to PL1, which might be EL1 or EL3 */
13529 if (arm_is_secure(env
) && !arm_el_is_aa64(env
, 3)) {
13534 if (cur_el
== 3 && !is_a64(env
)) {
13535 /* Secure PL1 running at EL3 */
13549 * The NSACR allows A-profile AArch32 EL3 and M-profile secure mode
13550 * to control non-secure access to the FPU. It doesn't have any
13551 * effect if EL3 is AArch64 or if EL3 doesn't exist at all.
13553 if ((arm_feature(env
, ARM_FEATURE_EL3
) && !arm_el_is_aa64(env
, 3) &&
13554 cur_el
<= 2 && !arm_is_secure_below_el3(env
))) {
13555 if (!extract32(env
->cp15
.nsacr
, 10, 1)) {
13556 /* FP insns act as UNDEF */
13557 return cur_el
== 2 ? 2 : 1;
13561 /* For the CPTR registers we don't need to guard with an ARM_FEATURE
13562 * check because zero bits in the registers mean "don't trap".
13565 /* CPTR_EL2 : present in v7VE or v8 */
13566 if (cur_el
<= 2 && extract32(env
->cp15
.cptr_el
[2], 10, 1)
13567 && !arm_is_secure_below_el3(env
)) {
13568 /* Trap FP ops at EL2, NS-EL1 or NS-EL0 to EL2 */
13572 /* CPTR_EL3 : present in v8 */
13573 if (extract32(env
->cp15
.cptr_el
[3], 10, 1)) {
13574 /* Trap all FP ops to EL3 */
13581 ARMMMUIdx
arm_v7m_mmu_idx_all(CPUARMState
*env
,
13582 bool secstate
, bool priv
, bool negpri
)
13584 ARMMMUIdx mmu_idx
= ARM_MMU_IDX_M
;
13587 mmu_idx
|= ARM_MMU_IDX_M_PRIV
;
13591 mmu_idx
|= ARM_MMU_IDX_M_NEGPRI
;
13595 mmu_idx
|= ARM_MMU_IDX_M_S
;
13601 ARMMMUIdx
arm_v7m_mmu_idx_for_secstate_and_priv(CPUARMState
*env
,
13602 bool secstate
, bool priv
)
13604 bool negpri
= armv7m_nvic_neg_prio_requested(env
->nvic
, secstate
);
13606 return arm_v7m_mmu_idx_all(env
, secstate
, priv
, negpri
);
13609 /* Return the MMU index for a v7M CPU in the specified security state */
13610 ARMMMUIdx
arm_v7m_mmu_idx_for_secstate(CPUARMState
*env
, bool secstate
)
13612 bool priv
= arm_current_el(env
) != 0;
13614 return arm_v7m_mmu_idx_for_secstate_and_priv(env
, secstate
, priv
);
13617 ARMMMUIdx
arm_mmu_idx(CPUARMState
*env
)
13621 if (arm_feature(env
, ARM_FEATURE_M
)) {
13622 return arm_v7m_mmu_idx_for_secstate(env
, env
->v7m
.secure
);
13625 el
= arm_current_el(env
);
13626 if (el
< 2 && arm_is_secure_below_el3(env
)) {
13627 return ARMMMUIdx_S1SE0
+ el
;
13629 return ARMMMUIdx_S12NSE0
+ el
;
13633 int cpu_mmu_index(CPUARMState
*env
, bool ifetch
)
13635 return arm_to_core_mmu_idx(arm_mmu_idx(env
));
13638 #ifndef CONFIG_USER_ONLY
13639 ARMMMUIdx
arm_stage1_mmu_idx(CPUARMState
*env
)
13641 return stage_1_mmu_idx(arm_mmu_idx(env
));
13645 void cpu_get_tb_cpu_state(CPUARMState
*env
, target_ulong
*pc
,
13646 target_ulong
*cs_base
, uint32_t *pflags
)
13648 ARMMMUIdx mmu_idx
= arm_mmu_idx(env
);
13649 int current_el
= arm_current_el(env
);
13650 int fp_el
= fp_exception_el(env
, current_el
);
13651 uint32_t flags
= 0;
13654 ARMCPU
*cpu
= env_archcpu(env
);
13658 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, AARCH64_STATE
, 1);
13660 /* Get control bits for tagged addresses. */
13662 ARMMMUIdx stage1
= stage_1_mmu_idx(mmu_idx
);
13663 ARMVAParameters p0
= aa64_va_parameters_both(env
, 0, stage1
);
13666 /* FIXME: ARMv8.1-VHE S2 translation regime. */
13667 if (regime_el(env
, stage1
) < 2) {
13668 ARMVAParameters p1
= aa64_va_parameters_both(env
, -1, stage1
);
13669 tbid
= (p1
.tbi
<< 1) | p0
.tbi
;
13670 tbii
= tbid
& ~((p1
.tbid
<< 1) | p0
.tbid
);
13673 tbii
= tbid
& !p0
.tbid
;
13676 flags
= FIELD_DP32(flags
, TBFLAG_A64
, TBII
, tbii
);
13677 flags
= FIELD_DP32(flags
, TBFLAG_A64
, TBID
, tbid
);
13680 if (cpu_isar_feature(aa64_sve
, cpu
)) {
13681 int sve_el
= sve_exception_el(env
, current_el
);
13684 /* If SVE is disabled, but FP is enabled,
13685 * then the effective len is 0.
13687 if (sve_el
!= 0 && fp_el
== 0) {
13690 zcr_len
= sve_zcr_len_for_el(env
, current_el
);
13692 flags
= FIELD_DP32(flags
, TBFLAG_A64
, SVEEXC_EL
, sve_el
);
13693 flags
= FIELD_DP32(flags
, TBFLAG_A64
, ZCR_LEN
, zcr_len
);
13696 sctlr
= arm_sctlr(env
, current_el
);
13698 if (cpu_isar_feature(aa64_pauth
, cpu
)) {
13700 * In order to save space in flags, we record only whether
13701 * pauth is "inactive", meaning all insns are implemented as
13702 * a nop, or "active" when some action must be performed.
13703 * The decision of which action to take is left to a helper.
13705 if (sctlr
& (SCTLR_EnIA
| SCTLR_EnIB
| SCTLR_EnDA
| SCTLR_EnDB
)) {
13706 flags
= FIELD_DP32(flags
, TBFLAG_A64
, PAUTH_ACTIVE
, 1);
13710 if (cpu_isar_feature(aa64_bti
, cpu
)) {
13711 /* Note that SCTLR_EL[23].BT == SCTLR_BT1. */
13712 if (sctlr
& (current_el
== 0 ? SCTLR_BT0
: SCTLR_BT1
)) {
13713 flags
= FIELD_DP32(flags
, TBFLAG_A64
, BT
, 1);
13715 flags
= FIELD_DP32(flags
, TBFLAG_A64
, BTYPE
, env
->btype
);
13718 *pc
= env
->regs
[15];
13719 flags
= FIELD_DP32(flags
, TBFLAG_A32
, THUMB
, env
->thumb
);
13720 flags
= FIELD_DP32(flags
, TBFLAG_A32
, VECLEN
, env
->vfp
.vec_len
);
13721 flags
= FIELD_DP32(flags
, TBFLAG_A32
, VECSTRIDE
, env
->vfp
.vec_stride
);
13722 flags
= FIELD_DP32(flags
, TBFLAG_A32
, CONDEXEC
, env
->condexec_bits
);
13723 flags
= FIELD_DP32(flags
, TBFLAG_A32
, SCTLR_B
, arm_sctlr_b(env
));
13724 flags
= FIELD_DP32(flags
, TBFLAG_A32
, NS
, !access_secure_reg(env
));
13725 if (env
->vfp
.xregs
[ARM_VFP_FPEXC
] & (1 << 30)
13726 || arm_el_is_aa64(env
, 1) || arm_feature(env
, ARM_FEATURE_M
)) {
13727 flags
= FIELD_DP32(flags
, TBFLAG_A32
, VFPEN
, 1);
13729 /* Note that XSCALE_CPAR shares bits with VECSTRIDE */
13730 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
13731 flags
= FIELD_DP32(flags
, TBFLAG_A32
,
13732 XSCALE_CPAR
, env
->cp15
.c15_cpar
);
13736 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, MMUIDX
, arm_to_core_mmu_idx(mmu_idx
));
13738 /* The SS_ACTIVE and PSTATE_SS bits correspond to the state machine
13739 * states defined in the ARM ARM for software singlestep:
13740 * SS_ACTIVE PSTATE.SS State
13741 * 0 x Inactive (the TB flag for SS is always 0)
13742 * 1 0 Active-pending
13743 * 1 1 Active-not-pending
13745 if (arm_singlestep_active(env
)) {
13746 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, SS_ACTIVE
, 1);
13748 if (env
->pstate
& PSTATE_SS
) {
13749 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, PSTATE_SS
, 1);
13752 if (env
->uncached_cpsr
& PSTATE_SS
) {
13753 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, PSTATE_SS
, 1);
13757 if (arm_cpu_data_is_big_endian(env
)) {
13758 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, BE_DATA
, 1);
13760 flags
= FIELD_DP32(flags
, TBFLAG_ANY
, FPEXC_EL
, fp_el
);
13762 if (arm_v7m_is_handler_mode(env
)) {
13763 flags
= FIELD_DP32(flags
, TBFLAG_A32
, HANDLER
, 1);
13766 /* v8M always applies stack limit checks unless CCR.STKOFHFNMIGN is
13767 * suppressing them because the requested execution priority is less than 0.
13769 if (arm_feature(env
, ARM_FEATURE_V8
) &&
13770 arm_feature(env
, ARM_FEATURE_M
) &&
13771 !((mmu_idx
& ARM_MMU_IDX_M_NEGPRI
) &&
13772 (env
->v7m
.ccr
[env
->v7m
.secure
] & R_V7M_CCR_STKOFHFNMIGN_MASK
))) {
13773 flags
= FIELD_DP32(flags
, TBFLAG_A32
, STACKCHECK
, 1);
13776 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
13777 FIELD_EX32(env
->v7m
.fpccr
[M_REG_S
], V7M_FPCCR
, S
) != env
->v7m
.secure
) {
13778 flags
= FIELD_DP32(flags
, TBFLAG_A32
, FPCCR_S_WRONG
, 1);
13781 if (arm_feature(env
, ARM_FEATURE_M
) &&
13782 (env
->v7m
.fpccr
[env
->v7m
.secure
] & R_V7M_FPCCR_ASPEN_MASK
) &&
13783 (!(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_FPCA_MASK
) ||
13784 (env
->v7m
.secure
&&
13785 !(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
)))) {
13787 * ASPEN is set, but FPCA/SFPA indicate that there is no active
13788 * FP context; we must create a new FP context before executing
13791 flags
= FIELD_DP32(flags
, TBFLAG_A32
, NEW_FP_CTXT_NEEDED
, 1);
13794 if (arm_feature(env
, ARM_FEATURE_M
)) {
13795 bool is_secure
= env
->v7m
.fpccr
[M_REG_S
] & R_V7M_FPCCR_S_MASK
;
13797 if (env
->v7m
.fpccr
[is_secure
] & R_V7M_FPCCR_LSPACT_MASK
) {
13798 flags
= FIELD_DP32(flags
, TBFLAG_A32
, LSPACT
, 1);
13806 #ifdef TARGET_AARCH64
13808 * The manual says that when SVE is enabled and VQ is widened the
13809 * implementation is allowed to zero the previously inaccessible
13810 * portion of the registers. The corollary to that is that when
13811 * SVE is enabled and VQ is narrowed we are also allowed to zero
13812 * the now inaccessible portion of the registers.
13814 * The intent of this is that no predicate bit beyond VQ is ever set.
13815 * Which means that some operations on predicate registers themselves
13816 * may operate on full uint64_t or even unrolled across the maximum
13817 * uint64_t[4]. Performing 4 bits of host arithmetic unconditionally
13818 * may well be cheaper than conditionals to restrict the operation
13819 * to the relevant portion of a uint16_t[16].
13821 void aarch64_sve_narrow_vq(CPUARMState
*env
, unsigned vq
)
13826 assert(vq
>= 1 && vq
<= ARM_MAX_VQ
);
13827 assert(vq
<= env_archcpu(env
)->sve_max_vq
);
13829 /* Zap the high bits of the zregs. */
13830 for (i
= 0; i
< 32; i
++) {
13831 memset(&env
->vfp
.zregs
[i
].d
[2 * vq
], 0, 16 * (ARM_MAX_VQ
- vq
));
13834 /* Zap the high bits of the pregs and ffr. */
13837 pmask
= ~(-1ULL << (16 * (vq
& 3)));
13839 for (j
= vq
/ 4; j
< ARM_MAX_VQ
/ 4; j
++) {
13840 for (i
= 0; i
< 17; ++i
) {
13841 env
->vfp
.pregs
[i
].p
[j
] &= pmask
;
13848 * Notice a change in SVE vector size when changing EL.
13850 void aarch64_sve_change_el(CPUARMState
*env
, int old_el
,
13851 int new_el
, bool el0_a64
)
13853 ARMCPU
*cpu
= env_archcpu(env
);
13854 int old_len
, new_len
;
13855 bool old_a64
, new_a64
;
13857 /* Nothing to do if no SVE. */
13858 if (!cpu_isar_feature(aa64_sve
, cpu
)) {
13862 /* Nothing to do if FP is disabled in either EL. */
13863 if (fp_exception_el(env
, old_el
) || fp_exception_el(env
, new_el
)) {
13868 * DDI0584A.d sec 3.2: "If SVE instructions are disabled or trapped
13869 * at ELx, or not available because the EL is in AArch32 state, then
13870 * for all purposes other than a direct read, the ZCR_ELx.LEN field
13871 * has an effective value of 0".
13873 * Consider EL2 (aa64, vq=4) -> EL0 (aa32) -> EL1 (aa64, vq=0).
13874 * If we ignore aa32 state, we would fail to see the vq4->vq0 transition
13875 * from EL2->EL1. Thus we go ahead and narrow when entering aa32 so that
13876 * we already have the correct register contents when encountering the
13877 * vq0->vq0 transition between EL0->EL1.
13879 old_a64
= old_el
? arm_el_is_aa64(env
, old_el
) : el0_a64
;
13880 old_len
= (old_a64
&& !sve_exception_el(env
, old_el
)
13881 ? sve_zcr_len_for_el(env
, old_el
) : 0);
13882 new_a64
= new_el
? arm_el_is_aa64(env
, new_el
) : el0_a64
;
13883 new_len
= (new_a64
&& !sve_exception_el(env
, new_el
)
13884 ? sve_zcr_len_for_el(env
, new_el
) : 0);
13886 /* When changing vector length, clear inaccessible state. */
13887 if (new_len
< old_len
) {
13888 aarch64_sve_narrow_vq(env
, new_len
+ 1);