1 #include "qemu/osdep.h"
2 #include "target/arm/idau.h"
6 #include "exec/gdbstub.h"
7 #include "exec/helper-proto.h"
8 #include "qemu/host-utils.h"
9 #include "sysemu/arch_init.h"
10 #include "sysemu/sysemu.h"
11 #include "qemu/bitops.h"
12 #include "qemu/crc32c.h"
13 #include "exec/exec-all.h"
14 #include "exec/cpu_ldst.h"
16 #include <zlib.h> /* For crc32 */
17 #include "exec/semihost.h"
18 #include "sysemu/kvm.h"
19 #include "fpu/softfloat.h"
20 #include "qemu/range.h"
22 #define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
24 #ifndef CONFIG_USER_ONLY
25 /* Cacheability and shareability attributes for a memory access */
26 typedef struct ARMCacheAttrs
{
27 unsigned int attrs
:8; /* as in the MAIR register encoding */
28 unsigned int shareability
:2; /* as in the SH field of the VMSAv8-64 PTEs */
31 static bool get_phys_addr(CPUARMState
*env
, target_ulong address
,
32 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
33 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
34 target_ulong
*page_size
,
35 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
);
37 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
38 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
39 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
40 target_ulong
*page_size_ptr
,
41 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
);
43 /* Security attributes for an address, as returned by v8m_security_lookup. */
44 typedef struct V8M_SAttributes
{
45 bool subpage
; /* true if these attrs don't cover the whole TARGET_PAGE */
54 static void v8m_security_lookup(CPUARMState
*env
, uint32_t address
,
55 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
56 V8M_SAttributes
*sattrs
);
59 static int vfp_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
63 /* VFP data registers are always little-endian. */
64 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
66 stq_le_p(buf
, *aa32_vfp_dreg(env
, reg
));
69 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
70 /* Aliases for Q regs. */
73 uint64_t *q
= aa32_vfp_qreg(env
, reg
- 32);
75 stq_le_p(buf
+ 8, q
[1]);
79 switch (reg
- nregs
) {
80 case 0: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPSID
]); return 4;
81 case 1: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPSCR
]); return 4;
82 case 2: stl_p(buf
, env
->vfp
.xregs
[ARM_VFP_FPEXC
]); return 4;
87 static int vfp_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
91 nregs
= arm_feature(env
, ARM_FEATURE_VFP3
) ? 32 : 16;
93 *aa32_vfp_dreg(env
, reg
) = ldq_le_p(buf
);
96 if (arm_feature(env
, ARM_FEATURE_NEON
)) {
99 uint64_t *q
= aa32_vfp_qreg(env
, reg
- 32);
100 q
[0] = ldq_le_p(buf
);
101 q
[1] = ldq_le_p(buf
+ 8);
105 switch (reg
- nregs
) {
106 case 0: env
->vfp
.xregs
[ARM_VFP_FPSID
] = ldl_p(buf
); return 4;
107 case 1: env
->vfp
.xregs
[ARM_VFP_FPSCR
] = ldl_p(buf
); return 4;
108 case 2: env
->vfp
.xregs
[ARM_VFP_FPEXC
] = ldl_p(buf
) & (1 << 30); return 4;
113 static int aarch64_fpu_gdb_get_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
117 /* 128 bit FP register */
119 uint64_t *q
= aa64_vfp_qreg(env
, reg
);
121 stq_le_p(buf
+ 8, q
[1]);
126 stl_p(buf
, vfp_get_fpsr(env
));
130 stl_p(buf
, vfp_get_fpcr(env
));
137 static int aarch64_fpu_gdb_set_reg(CPUARMState
*env
, uint8_t *buf
, int reg
)
141 /* 128 bit FP register */
143 uint64_t *q
= aa64_vfp_qreg(env
, reg
);
144 q
[0] = ldq_le_p(buf
);
145 q
[1] = ldq_le_p(buf
+ 8);
150 vfp_set_fpsr(env
, ldl_p(buf
));
154 vfp_set_fpcr(env
, ldl_p(buf
));
161 static uint64_t raw_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
163 assert(ri
->fieldoffset
);
164 if (cpreg_field_is_64bit(ri
)) {
165 return CPREG_FIELD64(env
, ri
);
167 return CPREG_FIELD32(env
, ri
);
171 static void raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
174 assert(ri
->fieldoffset
);
175 if (cpreg_field_is_64bit(ri
)) {
176 CPREG_FIELD64(env
, ri
) = value
;
178 CPREG_FIELD32(env
, ri
) = value
;
182 static void *raw_ptr(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
184 return (char *)env
+ ri
->fieldoffset
;
187 uint64_t read_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
189 /* Raw read of a coprocessor register (as needed for migration, etc). */
190 if (ri
->type
& ARM_CP_CONST
) {
191 return ri
->resetvalue
;
192 } else if (ri
->raw_readfn
) {
193 return ri
->raw_readfn(env
, ri
);
194 } else if (ri
->readfn
) {
195 return ri
->readfn(env
, ri
);
197 return raw_read(env
, ri
);
201 static void write_raw_cp_reg(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
204 /* Raw write of a coprocessor register (as needed for migration, etc).
205 * Note that constant registers are treated as write-ignored; the
206 * caller should check for success by whether a readback gives the
209 if (ri
->type
& ARM_CP_CONST
) {
211 } else if (ri
->raw_writefn
) {
212 ri
->raw_writefn(env
, ri
, v
);
213 } else if (ri
->writefn
) {
214 ri
->writefn(env
, ri
, v
);
216 raw_write(env
, ri
, v
);
220 static int arm_gdb_get_sysreg(CPUARMState
*env
, uint8_t *buf
, int reg
)
222 ARMCPU
*cpu
= arm_env_get_cpu(env
);
223 const ARMCPRegInfo
*ri
;
226 key
= cpu
->dyn_xml
.cpregs_keys
[reg
];
227 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, key
);
229 if (cpreg_field_is_64bit(ri
)) {
230 return gdb_get_reg64(buf
, (uint64_t)read_raw_cp_reg(env
, ri
));
232 return gdb_get_reg32(buf
, (uint32_t)read_raw_cp_reg(env
, ri
));
238 static int arm_gdb_set_sysreg(CPUARMState
*env
, uint8_t *buf
, int reg
)
243 static bool raw_accessors_invalid(const ARMCPRegInfo
*ri
)
245 /* Return true if the regdef would cause an assertion if you called
246 * read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a
247 * program bug for it not to have the NO_RAW flag).
248 * NB that returning false here doesn't necessarily mean that calling
249 * read/write_raw_cp_reg() is safe, because we can't distinguish "has
250 * read/write access functions which are safe for raw use" from "has
251 * read/write access functions which have side effects but has forgotten
252 * to provide raw access functions".
253 * The tests here line up with the conditions in read/write_raw_cp_reg()
254 * and assertions in raw_read()/raw_write().
256 if ((ri
->type
& ARM_CP_CONST
) ||
258 ((ri
->raw_writefn
|| ri
->writefn
) && (ri
->raw_readfn
|| ri
->readfn
))) {
264 bool write_cpustate_to_list(ARMCPU
*cpu
)
266 /* Write the coprocessor state from cpu->env to the (index,value) list. */
270 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
271 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
272 const ARMCPRegInfo
*ri
;
274 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
279 if (ri
->type
& ARM_CP_NO_RAW
) {
282 cpu
->cpreg_values
[i
] = read_raw_cp_reg(&cpu
->env
, ri
);
287 bool write_list_to_cpustate(ARMCPU
*cpu
)
292 for (i
= 0; i
< cpu
->cpreg_array_len
; i
++) {
293 uint32_t regidx
= kvm_to_cpreg_id(cpu
->cpreg_indexes
[i
]);
294 uint64_t v
= cpu
->cpreg_values
[i
];
295 const ARMCPRegInfo
*ri
;
297 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
302 if (ri
->type
& ARM_CP_NO_RAW
) {
305 /* Write value and confirm it reads back as written
306 * (to catch read-only registers and partially read-only
307 * registers where the incoming migration value doesn't match)
309 write_raw_cp_reg(&cpu
->env
, ri
, v
);
310 if (read_raw_cp_reg(&cpu
->env
, ri
) != v
) {
317 static void add_cpreg_to_list(gpointer key
, gpointer opaque
)
319 ARMCPU
*cpu
= opaque
;
321 const ARMCPRegInfo
*ri
;
323 regidx
= *(uint32_t *)key
;
324 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
326 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
327 cpu
->cpreg_indexes
[cpu
->cpreg_array_len
] = cpreg_to_kvm_id(regidx
);
328 /* The value array need not be initialized at this point */
329 cpu
->cpreg_array_len
++;
333 static void count_cpreg(gpointer key
, gpointer opaque
)
335 ARMCPU
*cpu
= opaque
;
337 const ARMCPRegInfo
*ri
;
339 regidx
= *(uint32_t *)key
;
340 ri
= get_arm_cp_reginfo(cpu
->cp_regs
, regidx
);
342 if (!(ri
->type
& (ARM_CP_NO_RAW
|ARM_CP_ALIAS
))) {
343 cpu
->cpreg_array_len
++;
347 static gint
cpreg_key_compare(gconstpointer a
, gconstpointer b
)
349 uint64_t aidx
= cpreg_to_kvm_id(*(uint32_t *)a
);
350 uint64_t bidx
= cpreg_to_kvm_id(*(uint32_t *)b
);
361 void init_cpreg_list(ARMCPU
*cpu
)
363 /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
364 * Note that we require cpreg_tuples[] to be sorted by key ID.
369 keys
= g_hash_table_get_keys(cpu
->cp_regs
);
370 keys
= g_list_sort(keys
, cpreg_key_compare
);
372 cpu
->cpreg_array_len
= 0;
374 g_list_foreach(keys
, count_cpreg
, cpu
);
376 arraylen
= cpu
->cpreg_array_len
;
377 cpu
->cpreg_indexes
= g_new(uint64_t, arraylen
);
378 cpu
->cpreg_values
= g_new(uint64_t, arraylen
);
379 cpu
->cpreg_vmstate_indexes
= g_new(uint64_t, arraylen
);
380 cpu
->cpreg_vmstate_values
= g_new(uint64_t, arraylen
);
381 cpu
->cpreg_vmstate_array_len
= cpu
->cpreg_array_len
;
382 cpu
->cpreg_array_len
= 0;
384 g_list_foreach(keys
, add_cpreg_to_list
, cpu
);
386 assert(cpu
->cpreg_array_len
== arraylen
);
392 * Some registers are not accessible if EL3.NS=0 and EL3 is using AArch32 but
393 * they are accessible when EL3 is using AArch64 regardless of EL3.NS.
395 * access_el3_aa32ns: Used to check AArch32 register views.
396 * access_el3_aa32ns_aa64any: Used to check both AArch32/64 register views.
398 static CPAccessResult
access_el3_aa32ns(CPUARMState
*env
,
399 const ARMCPRegInfo
*ri
,
402 bool secure
= arm_is_secure_below_el3(env
);
404 assert(!arm_el_is_aa64(env
, 3));
406 return CP_ACCESS_TRAP_UNCATEGORIZED
;
411 static CPAccessResult
access_el3_aa32ns_aa64any(CPUARMState
*env
,
412 const ARMCPRegInfo
*ri
,
415 if (!arm_el_is_aa64(env
, 3)) {
416 return access_el3_aa32ns(env
, ri
, isread
);
421 /* Some secure-only AArch32 registers trap to EL3 if used from
422 * Secure EL1 (but are just ordinary UNDEF in other non-EL3 contexts).
423 * Note that an access from Secure EL1 can only happen if EL3 is AArch64.
424 * We assume that the .access field is set to PL1_RW.
426 static CPAccessResult
access_trap_aa32s_el1(CPUARMState
*env
,
427 const ARMCPRegInfo
*ri
,
430 if (arm_current_el(env
) == 3) {
433 if (arm_is_secure_below_el3(env
)) {
434 return CP_ACCESS_TRAP_EL3
;
436 /* This will be EL1 NS and EL2 NS, which just UNDEF */
437 return CP_ACCESS_TRAP_UNCATEGORIZED
;
440 /* Check for traps to "powerdown debug" registers, which are controlled
443 static CPAccessResult
access_tdosa(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
446 int el
= arm_current_el(env
);
448 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDOSA
)
449 && !arm_is_secure_below_el3(env
)) {
450 return CP_ACCESS_TRAP_EL2
;
452 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDOSA
)) {
453 return CP_ACCESS_TRAP_EL3
;
458 /* Check for traps to "debug ROM" registers, which are controlled
459 * by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3.
461 static CPAccessResult
access_tdra(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
464 int el
= arm_current_el(env
);
466 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDRA
)
467 && !arm_is_secure_below_el3(env
)) {
468 return CP_ACCESS_TRAP_EL2
;
470 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
471 return CP_ACCESS_TRAP_EL3
;
476 /* Check for traps to general debug registers, which are controlled
477 * by MDCR_EL2.TDA for EL2 and MDCR_EL3.TDA for EL3.
479 static CPAccessResult
access_tda(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
482 int el
= arm_current_el(env
);
484 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TDA
)
485 && !arm_is_secure_below_el3(env
)) {
486 return CP_ACCESS_TRAP_EL2
;
488 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TDA
)) {
489 return CP_ACCESS_TRAP_EL3
;
494 /* Check for traps to performance monitor registers, which are controlled
495 * by MDCR_EL2.TPM for EL2 and MDCR_EL3.TPM for EL3.
497 static CPAccessResult
access_tpm(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
500 int el
= arm_current_el(env
);
502 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
503 && !arm_is_secure_below_el3(env
)) {
504 return CP_ACCESS_TRAP_EL2
;
506 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
507 return CP_ACCESS_TRAP_EL3
;
512 static void dacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
514 ARMCPU
*cpu
= arm_env_get_cpu(env
);
516 raw_write(env
, ri
, value
);
517 tlb_flush(CPU(cpu
)); /* Flush TLB as domain not tracked in TLB */
520 static void fcse_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
522 ARMCPU
*cpu
= arm_env_get_cpu(env
);
524 if (raw_read(env
, ri
) != value
) {
525 /* Unlike real hardware the qemu TLB uses virtual addresses,
526 * not modified virtual addresses, so this causes a TLB flush.
529 raw_write(env
, ri
, value
);
533 static void contextidr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
536 ARMCPU
*cpu
= arm_env_get_cpu(env
);
538 if (raw_read(env
, ri
) != value
&& !arm_feature(env
, ARM_FEATURE_PMSA
)
539 && !extended_addresses_enabled(env
)) {
540 /* For VMSA (when not using the LPAE long descriptor page table
541 * format) this register includes the ASID, so do a TLB flush.
542 * For PMSA it is purely a process ID and no action is needed.
546 raw_write(env
, ri
, value
);
549 static void tlbiall_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
552 /* Invalidate all (TLBIALL) */
553 ARMCPU
*cpu
= arm_env_get_cpu(env
);
558 static void tlbimva_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
561 /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
562 ARMCPU
*cpu
= arm_env_get_cpu(env
);
564 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
567 static void tlbiasid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
570 /* Invalidate by ASID (TLBIASID) */
571 ARMCPU
*cpu
= arm_env_get_cpu(env
);
576 static void tlbimvaa_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
579 /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
580 ARMCPU
*cpu
= arm_env_get_cpu(env
);
582 tlb_flush_page(CPU(cpu
), value
& TARGET_PAGE_MASK
);
585 /* IS variants of TLB operations must affect all cores */
586 static void tlbiall_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
589 CPUState
*cs
= ENV_GET_CPU(env
);
591 tlb_flush_all_cpus_synced(cs
);
594 static void tlbiasid_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
597 CPUState
*cs
= ENV_GET_CPU(env
);
599 tlb_flush_all_cpus_synced(cs
);
602 static void tlbimva_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
605 CPUState
*cs
= ENV_GET_CPU(env
);
607 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
610 static void tlbimvaa_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
613 CPUState
*cs
= ENV_GET_CPU(env
);
615 tlb_flush_page_all_cpus_synced(cs
, value
& TARGET_PAGE_MASK
);
618 static void tlbiall_nsnh_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
621 CPUState
*cs
= ENV_GET_CPU(env
);
623 tlb_flush_by_mmuidx(cs
,
624 ARMMMUIdxBit_S12NSE1
|
625 ARMMMUIdxBit_S12NSE0
|
629 static void tlbiall_nsnh_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
632 CPUState
*cs
= ENV_GET_CPU(env
);
634 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
635 ARMMMUIdxBit_S12NSE1
|
636 ARMMMUIdxBit_S12NSE0
|
640 static void tlbiipas2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
643 /* Invalidate by IPA. This has to invalidate any structures that
644 * contain only stage 2 translation information, but does not need
645 * to apply to structures that contain combined stage 1 and stage 2
646 * translation information.
647 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
649 CPUState
*cs
= ENV_GET_CPU(env
);
652 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
656 pageaddr
= sextract64(value
<< 12, 0, 40);
658 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
661 static void tlbiipas2_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
664 CPUState
*cs
= ENV_GET_CPU(env
);
667 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
671 pageaddr
= sextract64(value
<< 12, 0, 40);
673 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
677 static void tlbiall_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
680 CPUState
*cs
= ENV_GET_CPU(env
);
682 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
685 static void tlbiall_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
688 CPUState
*cs
= ENV_GET_CPU(env
);
690 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
693 static void tlbimva_hyp_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
696 CPUState
*cs
= ENV_GET_CPU(env
);
697 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
699 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
702 static void tlbimva_hyp_is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
705 CPUState
*cs
= ENV_GET_CPU(env
);
706 uint64_t pageaddr
= value
& ~MAKE_64BIT_MASK(0, 12);
708 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
712 static const ARMCPRegInfo cp_reginfo
[] = {
713 /* Define the secure and non-secure FCSE identifier CP registers
714 * separately because there is no secure bank in V8 (no _EL3). This allows
715 * the secure register to be properly reset and migrated. There is also no
716 * v8 EL1 version of the register so the non-secure instance stands alone.
719 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
720 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
721 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_ns
),
722 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
723 { .name
= "FCSEIDR_S",
724 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 0,
725 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
726 .fieldoffset
= offsetof(CPUARMState
, cp15
.fcseidr_s
),
727 .resetvalue
= 0, .writefn
= fcse_write
, .raw_writefn
= raw_write
, },
728 /* Define the secure and non-secure context identifier CP registers
729 * separately because there is no secure bank in V8 (no _EL3). This allows
730 * the secure register to be properly reset and migrated. In the
731 * non-secure case, the 32-bit register will have reset and migration
732 * disabled during registration as it is handled by the 64-bit instance.
734 { .name
= "CONTEXTIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
735 .opc0
= 3, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
736 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_NS
,
737 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_el
[1]),
738 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
739 { .name
= "CONTEXTIDR_S", .state
= ARM_CP_STATE_AA32
,
740 .cp
= 15, .opc1
= 0, .crn
= 13, .crm
= 0, .opc2
= 1,
741 .access
= PL1_RW
, .secure
= ARM_CP_SECSTATE_S
,
742 .fieldoffset
= offsetof(CPUARMState
, cp15
.contextidr_s
),
743 .resetvalue
= 0, .writefn
= contextidr_write
, .raw_writefn
= raw_write
, },
747 static const ARMCPRegInfo not_v8_cp_reginfo
[] = {
748 /* NB: Some of these registers exist in v8 but with more precise
749 * definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
751 /* MMU Domain access control / MPU write buffer control */
753 .cp
= 15, .opc1
= CP_ANY
, .crn
= 3, .crm
= CP_ANY
, .opc2
= CP_ANY
,
754 .access
= PL1_RW
, .resetvalue
= 0,
755 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
756 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
757 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
758 /* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs.
759 * For v6 and v5, these mappings are overly broad.
761 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 0,
762 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
763 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 1,
764 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
765 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 4,
766 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
767 { .name
= "TLB_LOCKDOWN", .cp
= 15, .crn
= 10, .crm
= 8,
768 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
769 /* Cache maintenance ops; some of this space may be overridden later. */
770 { .name
= "CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
771 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
772 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
},
776 static const ARMCPRegInfo not_v6_cp_reginfo
[] = {
777 /* Not all pre-v6 cores implemented this WFI, so this is slightly
780 { .name
= "WFI_v5", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= 2,
781 .access
= PL1_W
, .type
= ARM_CP_WFI
},
785 static const ARMCPRegInfo not_v7_cp_reginfo
[] = {
786 /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
787 * is UNPREDICTABLE; we choose to NOP as most implementations do).
789 { .name
= "WFI_v6", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
790 .access
= PL1_W
, .type
= ARM_CP_WFI
},
791 /* L1 cache lockdown. Not architectural in v6 and earlier but in practice
792 * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
793 * OMAPCP will override this space.
795 { .name
= "DLOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 0,
796 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_data
),
798 { .name
= "ILOCKDOWN", .cp
= 15, .crn
= 9, .crm
= 0, .opc1
= 0, .opc2
= 1,
799 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_insn
),
801 /* v6 doesn't have the cache ID registers but Linux reads them anyway */
802 { .name
= "DUMMY", .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= CP_ANY
,
803 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
805 /* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR;
806 * implementing it as RAZ means the "debug architecture version" bits
807 * will read as a reserved value, which should cause Linux to not try
808 * to use the debug hardware.
810 { .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
811 .access
= PL0_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
812 /* MMU TLB control. Note that the wildcarding means we cover not just
813 * the unified TLB ops but also the dside/iside/inner-shareable variants.
815 { .name
= "TLBIALL", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
816 .opc1
= CP_ANY
, .opc2
= 0, .access
= PL1_W
, .writefn
= tlbiall_write
,
817 .type
= ARM_CP_NO_RAW
},
818 { .name
= "TLBIMVA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
819 .opc1
= CP_ANY
, .opc2
= 1, .access
= PL1_W
, .writefn
= tlbimva_write
,
820 .type
= ARM_CP_NO_RAW
},
821 { .name
= "TLBIASID", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
822 .opc1
= CP_ANY
, .opc2
= 2, .access
= PL1_W
, .writefn
= tlbiasid_write
,
823 .type
= ARM_CP_NO_RAW
},
824 { .name
= "TLBIMVAA", .cp
= 15, .crn
= 8, .crm
= CP_ANY
,
825 .opc1
= CP_ANY
, .opc2
= 3, .access
= PL1_W
, .writefn
= tlbimvaa_write
,
826 .type
= ARM_CP_NO_RAW
},
827 { .name
= "PRRR", .cp
= 15, .crn
= 10, .crm
= 2,
828 .opc1
= 0, .opc2
= 0, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
829 { .name
= "NMRR", .cp
= 15, .crn
= 10, .crm
= 2,
830 .opc1
= 0, .opc2
= 1, .access
= PL1_RW
, .type
= ARM_CP_NOP
},
834 static void cpacr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
839 /* In ARMv8 most bits of CPACR_EL1 are RES0. */
840 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
841 /* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
842 * ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
843 * TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
845 if (arm_feature(env
, ARM_FEATURE_VFP
)) {
846 /* VFP coprocessor: cp10 & cp11 [23:20] */
847 mask
|= (1 << 31) | (1 << 30) | (0xf << 20);
849 if (!arm_feature(env
, ARM_FEATURE_NEON
)) {
850 /* ASEDIS [31] bit is RAO/WI */
854 /* VFPv3 and upwards with NEON implement 32 double precision
855 * registers (D0-D31).
857 if (!arm_feature(env
, ARM_FEATURE_NEON
) ||
858 !arm_feature(env
, ARM_FEATURE_VFP3
)) {
859 /* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
865 env
->cp15
.cpacr_el1
= value
;
868 static void cpacr_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
870 /* Call cpacr_write() so that we reset with the correct RAO bits set
871 * for our CPU features.
873 cpacr_write(env
, ri
, 0);
876 static CPAccessResult
cpacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
879 if (arm_feature(env
, ARM_FEATURE_V8
)) {
880 /* Check if CPACR accesses are to be trapped to EL2 */
881 if (arm_current_el(env
) == 1 &&
882 (env
->cp15
.cptr_el
[2] & CPTR_TCPAC
) && !arm_is_secure(env
)) {
883 return CP_ACCESS_TRAP_EL2
;
884 /* Check if CPACR accesses are to be trapped to EL3 */
885 } else if (arm_current_el(env
) < 3 &&
886 (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
887 return CP_ACCESS_TRAP_EL3
;
894 static CPAccessResult
cptr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
897 /* Check if CPTR accesses are set to trap to EL3 */
898 if (arm_current_el(env
) == 2 && (env
->cp15
.cptr_el
[3] & CPTR_TCPAC
)) {
899 return CP_ACCESS_TRAP_EL3
;
905 static const ARMCPRegInfo v6_cp_reginfo
[] = {
906 /* prefetch by MVA in v6, NOP in v7 */
907 { .name
= "MVA_prefetch",
908 .cp
= 15, .crn
= 7, .crm
= 13, .opc1
= 0, .opc2
= 1,
909 .access
= PL1_W
, .type
= ARM_CP_NOP
},
910 /* We need to break the TB after ISB to execute self-modifying code
911 * correctly and also to take any pending interrupts immediately.
912 * So use arm_cp_write_ignore() function instead of ARM_CP_NOP flag.
914 { .name
= "ISB", .cp
= 15, .crn
= 7, .crm
= 5, .opc1
= 0, .opc2
= 4,
915 .access
= PL0_W
, .type
= ARM_CP_NO_RAW
, .writefn
= arm_cp_write_ignore
},
916 { .name
= "DSB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 4,
917 .access
= PL0_W
, .type
= ARM_CP_NOP
},
918 { .name
= "DMB", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 5,
919 .access
= PL0_W
, .type
= ARM_CP_NOP
},
920 { .name
= "IFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 2,
922 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ifar_s
),
923 offsetof(CPUARMState
, cp15
.ifar_ns
) },
925 /* Watchpoint Fault Address Register : should actually only be present
926 * for 1136, 1176, 11MPCore.
928 { .name
= "WFAR", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 1,
929 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0, },
930 { .name
= "CPACR", .state
= ARM_CP_STATE_BOTH
, .opc0
= 3,
931 .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 2, .accessfn
= cpacr_access
,
932 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.cpacr_el1
),
933 .resetfn
= cpacr_reset
, .writefn
= cpacr_write
},
937 /* Definitions for the PMU registers */
938 #define PMCRN_MASK 0xf800
939 #define PMCRN_SHIFT 11
944 static inline uint32_t pmu_num_counters(CPUARMState
*env
)
946 return (env
->cp15
.c9_pmcr
& PMCRN_MASK
) >> PMCRN_SHIFT
;
949 /* Bits allowed to be set/cleared for PMCNTEN* and PMINTEN* */
950 static inline uint64_t pmu_counter_mask(CPUARMState
*env
)
952 return (1 << 31) | ((1 << pmu_num_counters(env
)) - 1);
955 static CPAccessResult
pmreg_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
958 /* Performance monitor registers user accessibility is controlled
959 * by PMUSERENR. MDCR_EL2.TPM and MDCR_EL3.TPM allow configurable
960 * trapping to EL2 or EL3 for other accesses.
962 int el
= arm_current_el(env
);
964 if (el
== 0 && !(env
->cp15
.c9_pmuserenr
& 1)) {
965 return CP_ACCESS_TRAP
;
967 if (el
< 2 && (env
->cp15
.mdcr_el2
& MDCR_TPM
)
968 && !arm_is_secure_below_el3(env
)) {
969 return CP_ACCESS_TRAP_EL2
;
971 if (el
< 3 && (env
->cp15
.mdcr_el3
& MDCR_TPM
)) {
972 return CP_ACCESS_TRAP_EL3
;
978 static CPAccessResult
pmreg_access_xevcntr(CPUARMState
*env
,
979 const ARMCPRegInfo
*ri
,
982 /* ER: event counter read trap control */
983 if (arm_feature(env
, ARM_FEATURE_V8
)
984 && arm_current_el(env
) == 0
985 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0
990 return pmreg_access(env
, ri
, isread
);
993 static CPAccessResult
pmreg_access_swinc(CPUARMState
*env
,
994 const ARMCPRegInfo
*ri
,
997 /* SW: software increment write trap control */
998 if (arm_feature(env
, ARM_FEATURE_V8
)
999 && arm_current_el(env
) == 0
1000 && (env
->cp15
.c9_pmuserenr
& (1 << 1)) != 0
1002 return CP_ACCESS_OK
;
1005 return pmreg_access(env
, ri
, isread
);
1008 #ifndef CONFIG_USER_ONLY
1010 static CPAccessResult
pmreg_access_selr(CPUARMState
*env
,
1011 const ARMCPRegInfo
*ri
,
1014 /* ER: event counter read trap control */
1015 if (arm_feature(env
, ARM_FEATURE_V8
)
1016 && arm_current_el(env
) == 0
1017 && (env
->cp15
.c9_pmuserenr
& (1 << 3)) != 0) {
1018 return CP_ACCESS_OK
;
1021 return pmreg_access(env
, ri
, isread
);
1024 static CPAccessResult
pmreg_access_ccntr(CPUARMState
*env
,
1025 const ARMCPRegInfo
*ri
,
1028 /* CR: cycle counter read trap control */
1029 if (arm_feature(env
, ARM_FEATURE_V8
)
1030 && arm_current_el(env
) == 0
1031 && (env
->cp15
.c9_pmuserenr
& (1 << 2)) != 0
1033 return CP_ACCESS_OK
;
1036 return pmreg_access(env
, ri
, isread
);
1039 static inline bool arm_ccnt_enabled(CPUARMState
*env
)
1041 /* This does not support checking PMCCFILTR_EL0 register */
1043 if (!(env
->cp15
.c9_pmcr
& PMCRE
) || !(env
->cp15
.c9_pmcnten
& (1 << 31))) {
1050 void pmccntr_sync(CPUARMState
*env
)
1052 uint64_t temp_ticks
;
1054 temp_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1055 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1057 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1058 /* Increment once every 64 processor clock cycles */
1062 if (arm_ccnt_enabled(env
)) {
1063 env
->cp15
.c15_ccnt
= temp_ticks
- env
->cp15
.c15_ccnt
;
1067 static void pmcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1072 if (value
& PMCRC
) {
1073 /* The counter has been reset */
1074 env
->cp15
.c15_ccnt
= 0;
1077 /* only the DP, X, D and E bits are writable */
1078 env
->cp15
.c9_pmcr
&= ~0x39;
1079 env
->cp15
.c9_pmcr
|= (value
& 0x39);
1084 static uint64_t pmccntr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1086 uint64_t total_ticks
;
1088 if (!arm_ccnt_enabled(env
)) {
1089 /* Counter is disabled, do not change value */
1090 return env
->cp15
.c15_ccnt
;
1093 total_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1094 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1096 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1097 /* Increment once every 64 processor clock cycles */
1100 return total_ticks
- env
->cp15
.c15_ccnt
;
1103 static void pmselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1106 /* The value of PMSELR.SEL affects the behavior of PMXEVTYPER and
1107 * PMXEVCNTR. We allow [0..31] to be written to PMSELR here; in the
1108 * meanwhile, we check PMSELR.SEL when PMXEVTYPER and PMXEVCNTR are
1111 env
->cp15
.c9_pmselr
= value
& 0x1f;
1114 static void pmccntr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1117 uint64_t total_ticks
;
1119 if (!arm_ccnt_enabled(env
)) {
1120 /* Counter is disabled, set the absolute value */
1121 env
->cp15
.c15_ccnt
= value
;
1125 total_ticks
= muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
),
1126 ARM_CPU_FREQ
, NANOSECONDS_PER_SECOND
);
1128 if (env
->cp15
.c9_pmcr
& PMCRD
) {
1129 /* Increment once every 64 processor clock cycles */
1132 env
->cp15
.c15_ccnt
= total_ticks
- value
;
1135 static void pmccntr_write32(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1138 uint64_t cur_val
= pmccntr_read(env
, NULL
);
1140 pmccntr_write(env
, ri
, deposit64(cur_val
, 0, 32, value
));
1143 #else /* CONFIG_USER_ONLY */
1145 void pmccntr_sync(CPUARMState
*env
)
1151 static void pmccfiltr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1155 env
->cp15
.pmccfiltr_el0
= value
& 0xfc000000;
1159 static void pmcntenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1162 value
&= pmu_counter_mask(env
);
1163 env
->cp15
.c9_pmcnten
|= value
;
1166 static void pmcntenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1169 value
&= pmu_counter_mask(env
);
1170 env
->cp15
.c9_pmcnten
&= ~value
;
1173 static void pmovsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1176 env
->cp15
.c9_pmovsr
&= ~value
;
1179 static void pmxevtyper_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1182 /* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when
1183 * PMSELR value is equal to or greater than the number of implemented
1184 * counters, but not equal to 0x1f. We opt to behave as a RAZ/WI.
1186 if (env
->cp15
.c9_pmselr
== 0x1f) {
1187 pmccfiltr_write(env
, ri
, value
);
1191 static uint64_t pmxevtyper_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1193 /* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER
1194 * are CONSTRAINED UNPREDICTABLE. See comments in pmxevtyper_write().
1196 if (env
->cp15
.c9_pmselr
== 0x1f) {
1197 return env
->cp15
.pmccfiltr_el0
;
1203 static void pmuserenr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1206 if (arm_feature(env
, ARM_FEATURE_V8
)) {
1207 env
->cp15
.c9_pmuserenr
= value
& 0xf;
1209 env
->cp15
.c9_pmuserenr
= value
& 1;
1213 static void pmintenset_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1216 /* We have no event counters so only the C bit can be changed */
1217 value
&= pmu_counter_mask(env
);
1218 env
->cp15
.c9_pminten
|= value
;
1221 static void pmintenclr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1224 value
&= pmu_counter_mask(env
);
1225 env
->cp15
.c9_pminten
&= ~value
;
1228 static void vbar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1231 /* Note that even though the AArch64 view of this register has bits
1232 * [10:0] all RES0 we can only mask the bottom 5, to comply with the
1233 * architectural requirements for bits which are RES0 only in some
1234 * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
1235 * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
1237 raw_write(env
, ri
, value
& ~0x1FULL
);
1240 static void scr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
1242 /* We only mask off bits that are RES0 both for AArch64 and AArch32.
1243 * For bits that vary between AArch32/64, code needs to check the
1244 * current execution mode before directly using the feature bit.
1246 uint32_t valid_mask
= SCR_AARCH64_MASK
| SCR_AARCH32_MASK
;
1248 if (!arm_feature(env
, ARM_FEATURE_EL2
)) {
1249 valid_mask
&= ~SCR_HCE
;
1251 /* On ARMv7, SMD (or SCD as it is called in v7) is only
1252 * supported if EL2 exists. The bit is UNK/SBZP when
1253 * EL2 is unavailable. In QEMU ARMv7, we force it to always zero
1254 * when EL2 is unavailable.
1255 * On ARMv8, this bit is always available.
1257 if (arm_feature(env
, ARM_FEATURE_V7
) &&
1258 !arm_feature(env
, ARM_FEATURE_V8
)) {
1259 valid_mask
&= ~SCR_SMD
;
1263 /* Clear all-context RES0 bits. */
1264 value
&= valid_mask
;
1265 raw_write(env
, ri
, value
);
1268 static uint64_t ccsidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1270 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1272 /* Acquire the CSSELR index from the bank corresponding to the CCSIDR
1275 uint32_t index
= A32_BANKED_REG_GET(env
, csselr
,
1276 ri
->secure
& ARM_CP_SECSTATE_S
);
1278 return cpu
->ccsidr
[index
];
1281 static void csselr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1284 raw_write(env
, ri
, value
& 0xf);
1287 static uint64_t isr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1289 CPUState
*cs
= ENV_GET_CPU(env
);
1292 if (cs
->interrupt_request
& CPU_INTERRUPT_HARD
) {
1295 if (cs
->interrupt_request
& CPU_INTERRUPT_FIQ
) {
1298 /* External aborts are not possible in QEMU so A bit is always clear */
1302 static const ARMCPRegInfo v7_cp_reginfo
[] = {
1303 /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
1304 { .name
= "NOP", .cp
= 15, .crn
= 7, .crm
= 0, .opc1
= 0, .opc2
= 4,
1305 .access
= PL1_W
, .type
= ARM_CP_NOP
},
1306 /* Performance monitors are implementation defined in v7,
1307 * but with an ARM recommended set of registers, which we
1308 * follow (although we don't actually implement any counters)
1310 * Performance registers fall into three categories:
1311 * (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
1312 * (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
1313 * (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
1314 * For the cases controlled by PMUSERENR we must set .access to PL0_RW
1315 * or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
1317 { .name
= "PMCNTENSET", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 1,
1318 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
1319 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1320 .writefn
= pmcntenset_write
,
1321 .accessfn
= pmreg_access
,
1322 .raw_writefn
= raw_write
},
1323 { .name
= "PMCNTENSET_EL0", .state
= ARM_CP_STATE_AA64
,
1324 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 1,
1325 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1326 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
), .resetvalue
= 0,
1327 .writefn
= pmcntenset_write
, .raw_writefn
= raw_write
},
1328 { .name
= "PMCNTENCLR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 2,
1330 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcnten
),
1331 .accessfn
= pmreg_access
,
1332 .writefn
= pmcntenclr_write
,
1333 .type
= ARM_CP_ALIAS
},
1334 { .name
= "PMCNTENCLR_EL0", .state
= ARM_CP_STATE_AA64
,
1335 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 2,
1336 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1337 .type
= ARM_CP_ALIAS
,
1338 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcnten
),
1339 .writefn
= pmcntenclr_write
},
1340 { .name
= "PMOVSR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 3,
1342 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmovsr
),
1343 .accessfn
= pmreg_access
,
1344 .writefn
= pmovsr_write
,
1345 .raw_writefn
= raw_write
},
1346 { .name
= "PMOVSCLR_EL0", .state
= ARM_CP_STATE_AA64
,
1347 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 3,
1348 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1349 .type
= ARM_CP_ALIAS
,
1350 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmovsr
),
1351 .writefn
= pmovsr_write
,
1352 .raw_writefn
= raw_write
},
1353 /* Unimplemented so WI. */
1354 { .name
= "PMSWINC", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 4,
1355 .access
= PL0_W
, .accessfn
= pmreg_access_swinc
, .type
= ARM_CP_NOP
},
1356 #ifndef CONFIG_USER_ONLY
1357 { .name
= "PMSELR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 5,
1358 .access
= PL0_RW
, .type
= ARM_CP_ALIAS
,
1359 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmselr
),
1360 .accessfn
= pmreg_access_selr
, .writefn
= pmselr_write
,
1361 .raw_writefn
= raw_write
},
1362 { .name
= "PMSELR_EL0", .state
= ARM_CP_STATE_AA64
,
1363 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 5,
1364 .access
= PL0_RW
, .accessfn
= pmreg_access_selr
,
1365 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmselr
),
1366 .writefn
= pmselr_write
, .raw_writefn
= raw_write
, },
1367 { .name
= "PMCCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 0,
1368 .access
= PL0_RW
, .resetvalue
= 0, .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
1369 .readfn
= pmccntr_read
, .writefn
= pmccntr_write32
,
1370 .accessfn
= pmreg_access_ccntr
},
1371 { .name
= "PMCCNTR_EL0", .state
= ARM_CP_STATE_AA64
,
1372 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 0,
1373 .access
= PL0_RW
, .accessfn
= pmreg_access_ccntr
,
1375 .readfn
= pmccntr_read
, .writefn
= pmccntr_write
, },
1377 { .name
= "PMCCFILTR_EL0", .state
= ARM_CP_STATE_AA64
,
1378 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 15, .opc2
= 7,
1379 .writefn
= pmccfiltr_write
,
1380 .access
= PL0_RW
, .accessfn
= pmreg_access
,
1382 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmccfiltr_el0
),
1384 { .name
= "PMXEVTYPER", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 1,
1385 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
, .accessfn
= pmreg_access
,
1386 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
1387 { .name
= "PMXEVTYPER_EL0", .state
= ARM_CP_STATE_AA64
,
1388 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 13, .opc2
= 1,
1389 .access
= PL0_RW
, .type
= ARM_CP_NO_RAW
, .accessfn
= pmreg_access
,
1390 .writefn
= pmxevtyper_write
, .readfn
= pmxevtyper_read
},
1391 /* Unimplemented, RAZ/WI. */
1392 { .name
= "PMXEVCNTR", .cp
= 15, .crn
= 9, .crm
= 13, .opc1
= 0, .opc2
= 2,
1393 .access
= PL0_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0,
1394 .accessfn
= pmreg_access_xevcntr
},
1395 { .name
= "PMUSERENR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 0,
1396 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
,
1397 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmuserenr
),
1399 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
1400 { .name
= "PMUSERENR_EL0", .state
= ARM_CP_STATE_AA64
,
1401 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 14, .opc2
= 0,
1402 .access
= PL0_R
| PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1403 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmuserenr
),
1405 .writefn
= pmuserenr_write
, .raw_writefn
= raw_write
},
1406 { .name
= "PMINTENSET", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 1,
1407 .access
= PL1_RW
, .accessfn
= access_tpm
,
1408 .type
= ARM_CP_ALIAS
| ARM_CP_IO
,
1409 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pminten
),
1411 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
},
1412 { .name
= "PMINTENSET_EL1", .state
= ARM_CP_STATE_AA64
,
1413 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 1,
1414 .access
= PL1_RW
, .accessfn
= access_tpm
,
1416 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1417 .writefn
= pmintenset_write
, .raw_writefn
= raw_write
,
1418 .resetvalue
= 0x0 },
1419 { .name
= "PMINTENCLR", .cp
= 15, .crn
= 9, .crm
= 14, .opc1
= 0, .opc2
= 2,
1420 .access
= PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1421 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1422 .writefn
= pmintenclr_write
, },
1423 { .name
= "PMINTENCLR_EL1", .state
= ARM_CP_STATE_AA64
,
1424 .opc0
= 3, .opc1
= 0, .crn
= 9, .crm
= 14, .opc2
= 2,
1425 .access
= PL1_RW
, .accessfn
= access_tpm
, .type
= ARM_CP_ALIAS
,
1426 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pminten
),
1427 .writefn
= pmintenclr_write
},
1428 { .name
= "CCSIDR", .state
= ARM_CP_STATE_BOTH
,
1429 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 0,
1430 .access
= PL1_R
, .readfn
= ccsidr_read
, .type
= ARM_CP_NO_RAW
},
1431 { .name
= "CSSELR", .state
= ARM_CP_STATE_BOTH
,
1432 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 2, .opc2
= 0,
1433 .access
= PL1_RW
, .writefn
= csselr_write
, .resetvalue
= 0,
1434 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.csselr_s
),
1435 offsetof(CPUARMState
, cp15
.csselr_ns
) } },
1436 /* Auxiliary ID register: this actually has an IMPDEF value but for now
1437 * just RAZ for all cores:
1439 { .name
= "AIDR", .state
= ARM_CP_STATE_BOTH
,
1440 .opc0
= 3, .opc1
= 1, .crn
= 0, .crm
= 0, .opc2
= 7,
1441 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1442 /* Auxiliary fault status registers: these also are IMPDEF, and we
1443 * choose to RAZ/WI for all cores.
1445 { .name
= "AFSR0_EL1", .state
= ARM_CP_STATE_BOTH
,
1446 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 0,
1447 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1448 { .name
= "AFSR1_EL1", .state
= ARM_CP_STATE_BOTH
,
1449 .opc0
= 3, .opc1
= 0, .crn
= 5, .crm
= 1, .opc2
= 1,
1450 .access
= PL1_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
1451 /* MAIR can just read-as-written because we don't implement caches
1452 * and so don't need to care about memory attributes.
1454 { .name
= "MAIR_EL1", .state
= ARM_CP_STATE_AA64
,
1455 .opc0
= 3, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0,
1456 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[1]),
1458 { .name
= "MAIR_EL3", .state
= ARM_CP_STATE_AA64
,
1459 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 2, .opc2
= 0,
1460 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[3]),
1462 /* For non-long-descriptor page tables these are PRRR and NMRR;
1463 * regardless they still act as reads-as-written for QEMU.
1465 /* MAIR0/1 are defined separately from their 64-bit counterpart which
1466 * allows them to assign the correct fieldoffset based on the endianness
1467 * handled in the field definitions.
1469 { .name
= "MAIR0", .state
= ARM_CP_STATE_AA32
,
1470 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 0, .access
= PL1_RW
,
1471 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair0_s
),
1472 offsetof(CPUARMState
, cp15
.mair0_ns
) },
1473 .resetfn
= arm_cp_reset_ignore
},
1474 { .name
= "MAIR1", .state
= ARM_CP_STATE_AA32
,
1475 .cp
= 15, .opc1
= 0, .crn
= 10, .crm
= 2, .opc2
= 1, .access
= PL1_RW
,
1476 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.mair1_s
),
1477 offsetof(CPUARMState
, cp15
.mair1_ns
) },
1478 .resetfn
= arm_cp_reset_ignore
},
1479 { .name
= "ISR_EL1", .state
= ARM_CP_STATE_BOTH
,
1480 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 1, .opc2
= 0,
1481 .type
= ARM_CP_NO_RAW
, .access
= PL1_R
, .readfn
= isr_read
},
1482 /* 32 bit ITLB invalidates */
1483 { .name
= "ITLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 0,
1484 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1485 { .name
= "ITLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 1,
1486 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1487 { .name
= "ITLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 5, .opc2
= 2,
1488 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1489 /* 32 bit DTLB invalidates */
1490 { .name
= "DTLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 0,
1491 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1492 { .name
= "DTLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 1,
1493 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1494 { .name
= "DTLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 6, .opc2
= 2,
1495 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1496 /* 32 bit TLB invalidates */
1497 { .name
= "TLBIALL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
1498 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_write
},
1499 { .name
= "TLBIMVA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
1500 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
1501 { .name
= "TLBIASID", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
1502 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiasid_write
},
1503 { .name
= "TLBIMVAA", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
1504 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
1508 static const ARMCPRegInfo v7mp_cp_reginfo
[] = {
1509 /* 32 bit TLB invalidates, Inner Shareable */
1510 { .name
= "TLBIALLIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
1511 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbiall_is_write
},
1512 { .name
= "TLBIMVAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
1513 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
1514 { .name
= "TLBIASIDIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
1515 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
1516 .writefn
= tlbiasid_is_write
},
1517 { .name
= "TLBIMVAAIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
1518 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
1519 .writefn
= tlbimvaa_is_write
},
1523 static void teecr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1530 static CPAccessResult
teehbr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1533 if (arm_current_el(env
) == 0 && (env
->teecr
& 1)) {
1534 return CP_ACCESS_TRAP
;
1536 return CP_ACCESS_OK
;
1539 static const ARMCPRegInfo t2ee_cp_reginfo
[] = {
1540 { .name
= "TEECR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 6, .opc2
= 0,
1541 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, teecr
),
1543 .writefn
= teecr_write
},
1544 { .name
= "TEEHBR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 6, .opc2
= 0,
1545 .access
= PL0_RW
, .fieldoffset
= offsetof(CPUARMState
, teehbr
),
1546 .accessfn
= teehbr_access
, .resetvalue
= 0 },
1550 static const ARMCPRegInfo v6k_cp_reginfo
[] = {
1551 { .name
= "TPIDR_EL0", .state
= ARM_CP_STATE_AA64
,
1552 .opc0
= 3, .opc1
= 3, .opc2
= 2, .crn
= 13, .crm
= 0,
1554 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[0]), .resetvalue
= 0 },
1555 { .name
= "TPIDRURW", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 2,
1557 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrurw_s
),
1558 offsetoflow32(CPUARMState
, cp15
.tpidrurw_ns
) },
1559 .resetfn
= arm_cp_reset_ignore
},
1560 { .name
= "TPIDRRO_EL0", .state
= ARM_CP_STATE_AA64
,
1561 .opc0
= 3, .opc1
= 3, .opc2
= 3, .crn
= 13, .crm
= 0,
1562 .access
= PL0_R
|PL1_W
,
1563 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidrro_el
[0]),
1565 { .name
= "TPIDRURO", .cp
= 15, .crn
= 13, .crm
= 0, .opc1
= 0, .opc2
= 3,
1566 .access
= PL0_R
|PL1_W
,
1567 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidruro_s
),
1568 offsetoflow32(CPUARMState
, cp15
.tpidruro_ns
) },
1569 .resetfn
= arm_cp_reset_ignore
},
1570 { .name
= "TPIDR_EL1", .state
= ARM_CP_STATE_AA64
,
1571 .opc0
= 3, .opc1
= 0, .opc2
= 4, .crn
= 13, .crm
= 0,
1573 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[1]), .resetvalue
= 0 },
1574 { .name
= "TPIDRPRW", .opc1
= 0, .cp
= 15, .crn
= 13, .crm
= 0, .opc2
= 4,
1576 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tpidrprw_s
),
1577 offsetoflow32(CPUARMState
, cp15
.tpidrprw_ns
) },
1582 #ifndef CONFIG_USER_ONLY
1584 static CPAccessResult
gt_cntfrq_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1587 /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero.
1588 * Writable only at the highest implemented exception level.
1590 int el
= arm_current_el(env
);
1594 if (!extract32(env
->cp15
.c14_cntkctl
, 0, 2)) {
1595 return CP_ACCESS_TRAP
;
1599 if (!isread
&& ri
->state
== ARM_CP_STATE_AA32
&&
1600 arm_is_secure_below_el3(env
)) {
1601 /* Accesses from 32-bit Secure EL1 UNDEF (*not* trap to EL3!) */
1602 return CP_ACCESS_TRAP_UNCATEGORIZED
;
1610 if (!isread
&& el
< arm_highest_el(env
)) {
1611 return CP_ACCESS_TRAP_UNCATEGORIZED
;
1614 return CP_ACCESS_OK
;
1617 static CPAccessResult
gt_counter_access(CPUARMState
*env
, int timeridx
,
1620 unsigned int cur_el
= arm_current_el(env
);
1621 bool secure
= arm_is_secure(env
);
1623 /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
1625 !extract32(env
->cp15
.c14_cntkctl
, timeridx
, 1)) {
1626 return CP_ACCESS_TRAP
;
1629 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
1630 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
1631 !extract32(env
->cp15
.cnthctl_el2
, 0, 1)) {
1632 return CP_ACCESS_TRAP_EL2
;
1634 return CP_ACCESS_OK
;
1637 static CPAccessResult
gt_timer_access(CPUARMState
*env
, int timeridx
,
1640 unsigned int cur_el
= arm_current_el(env
);
1641 bool secure
= arm_is_secure(env
);
1643 /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
1644 * EL0[PV]TEN is zero.
1647 !extract32(env
->cp15
.c14_cntkctl
, 9 - timeridx
, 1)) {
1648 return CP_ACCESS_TRAP
;
1651 if (arm_feature(env
, ARM_FEATURE_EL2
) &&
1652 timeridx
== GTIMER_PHYS
&& !secure
&& cur_el
< 2 &&
1653 !extract32(env
->cp15
.cnthctl_el2
, 1, 1)) {
1654 return CP_ACCESS_TRAP_EL2
;
1656 return CP_ACCESS_OK
;
1659 static CPAccessResult
gt_pct_access(CPUARMState
*env
,
1660 const ARMCPRegInfo
*ri
,
1663 return gt_counter_access(env
, GTIMER_PHYS
, isread
);
1666 static CPAccessResult
gt_vct_access(CPUARMState
*env
,
1667 const ARMCPRegInfo
*ri
,
1670 return gt_counter_access(env
, GTIMER_VIRT
, isread
);
1673 static CPAccessResult
gt_ptimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1676 return gt_timer_access(env
, GTIMER_PHYS
, isread
);
1679 static CPAccessResult
gt_vtimer_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1682 return gt_timer_access(env
, GTIMER_VIRT
, isread
);
1685 static CPAccessResult
gt_stimer_access(CPUARMState
*env
,
1686 const ARMCPRegInfo
*ri
,
1689 /* The AArch64 register view of the secure physical timer is
1690 * always accessible from EL3, and configurably accessible from
1693 switch (arm_current_el(env
)) {
1695 if (!arm_is_secure(env
)) {
1696 return CP_ACCESS_TRAP
;
1698 if (!(env
->cp15
.scr_el3
& SCR_ST
)) {
1699 return CP_ACCESS_TRAP_EL3
;
1701 return CP_ACCESS_OK
;
1704 return CP_ACCESS_TRAP
;
1706 return CP_ACCESS_OK
;
1708 g_assert_not_reached();
1712 static uint64_t gt_get_countervalue(CPUARMState
*env
)
1714 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) / GTIMER_SCALE
;
1717 static void gt_recalc_timer(ARMCPU
*cpu
, int timeridx
)
1719 ARMGenericTimer
*gt
= &cpu
->env
.cp15
.c14_timer
[timeridx
];
1722 /* Timer enabled: calculate and set current ISTATUS, irq, and
1723 * reset timer to when ISTATUS next has to change
1725 uint64_t offset
= timeridx
== GTIMER_VIRT
?
1726 cpu
->env
.cp15
.cntvoff_el2
: 0;
1727 uint64_t count
= gt_get_countervalue(&cpu
->env
);
1728 /* Note that this must be unsigned 64 bit arithmetic: */
1729 int istatus
= count
- offset
>= gt
->cval
;
1733 gt
->ctl
= deposit32(gt
->ctl
, 2, 1, istatus
);
1735 irqstate
= (istatus
&& !(gt
->ctl
& 2));
1736 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
1739 /* Next transition is when count rolls back over to zero */
1740 nexttick
= UINT64_MAX
;
1742 /* Next transition is when we hit cval */
1743 nexttick
= gt
->cval
+ offset
;
1745 /* Note that the desired next expiry time might be beyond the
1746 * signed-64-bit range of a QEMUTimer -- in this case we just
1747 * set the timer for as far in the future as possible. When the
1748 * timer expires we will reset the timer for any remaining period.
1750 if (nexttick
> INT64_MAX
/ GTIMER_SCALE
) {
1751 nexttick
= INT64_MAX
/ GTIMER_SCALE
;
1753 timer_mod(cpu
->gt_timer
[timeridx
], nexttick
);
1754 trace_arm_gt_recalc(timeridx
, irqstate
, nexttick
);
1756 /* Timer disabled: ISTATUS and timer output always clear */
1758 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], 0);
1759 timer_del(cpu
->gt_timer
[timeridx
]);
1760 trace_arm_gt_recalc_disabled(timeridx
);
1764 static void gt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1767 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1769 timer_del(cpu
->gt_timer
[timeridx
]);
1772 static uint64_t gt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1774 return gt_get_countervalue(env
);
1777 static uint64_t gt_virt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1779 return gt_get_countervalue(env
) - env
->cp15
.cntvoff_el2
;
1782 static void gt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1786 trace_arm_gt_cval_write(timeridx
, value
);
1787 env
->cp15
.c14_timer
[timeridx
].cval
= value
;
1788 gt_recalc_timer(arm_env_get_cpu(env
), timeridx
);
1791 static uint64_t gt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1794 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
1796 return (uint32_t)(env
->cp15
.c14_timer
[timeridx
].cval
-
1797 (gt_get_countervalue(env
) - offset
));
1800 static void gt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1804 uint64_t offset
= timeridx
== GTIMER_VIRT
? env
->cp15
.cntvoff_el2
: 0;
1806 trace_arm_gt_tval_write(timeridx
, value
);
1807 env
->cp15
.c14_timer
[timeridx
].cval
= gt_get_countervalue(env
) - offset
+
1808 sextract64(value
, 0, 32);
1809 gt_recalc_timer(arm_env_get_cpu(env
), timeridx
);
1812 static void gt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1816 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1817 uint32_t oldval
= env
->cp15
.c14_timer
[timeridx
].ctl
;
1819 trace_arm_gt_ctl_write(timeridx
, value
);
1820 env
->cp15
.c14_timer
[timeridx
].ctl
= deposit64(oldval
, 0, 2, value
);
1821 if ((oldval
^ value
) & 1) {
1822 /* Enable toggled */
1823 gt_recalc_timer(cpu
, timeridx
);
1824 } else if ((oldval
^ value
) & 2) {
1825 /* IMASK toggled: don't need to recalculate,
1826 * just set the interrupt line based on ISTATUS
1828 int irqstate
= (oldval
& 4) && !(value
& 2);
1830 trace_arm_gt_imask_toggle(timeridx
, irqstate
);
1831 qemu_set_irq(cpu
->gt_timer_outputs
[timeridx
], irqstate
);
1835 static void gt_phys_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1837 gt_timer_reset(env
, ri
, GTIMER_PHYS
);
1840 static void gt_phys_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1843 gt_cval_write(env
, ri
, GTIMER_PHYS
, value
);
1846 static uint64_t gt_phys_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1848 return gt_tval_read(env
, ri
, GTIMER_PHYS
);
1851 static void gt_phys_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1854 gt_tval_write(env
, ri
, GTIMER_PHYS
, value
);
1857 static void gt_phys_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1860 gt_ctl_write(env
, ri
, GTIMER_PHYS
, value
);
1863 static void gt_virt_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1865 gt_timer_reset(env
, ri
, GTIMER_VIRT
);
1868 static void gt_virt_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1871 gt_cval_write(env
, ri
, GTIMER_VIRT
, value
);
1874 static uint64_t gt_virt_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1876 return gt_tval_read(env
, ri
, GTIMER_VIRT
);
1879 static void gt_virt_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1882 gt_tval_write(env
, ri
, GTIMER_VIRT
, value
);
1885 static void gt_virt_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1888 gt_ctl_write(env
, ri
, GTIMER_VIRT
, value
);
1891 static void gt_cntvoff_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1894 ARMCPU
*cpu
= arm_env_get_cpu(env
);
1896 trace_arm_gt_cntvoff_write(value
);
1897 raw_write(env
, ri
, value
);
1898 gt_recalc_timer(cpu
, GTIMER_VIRT
);
1901 static void gt_hyp_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1903 gt_timer_reset(env
, ri
, GTIMER_HYP
);
1906 static void gt_hyp_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1909 gt_cval_write(env
, ri
, GTIMER_HYP
, value
);
1912 static uint64_t gt_hyp_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1914 return gt_tval_read(env
, ri
, GTIMER_HYP
);
1917 static void gt_hyp_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1920 gt_tval_write(env
, ri
, GTIMER_HYP
, value
);
1923 static void gt_hyp_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1926 gt_ctl_write(env
, ri
, GTIMER_HYP
, value
);
1929 static void gt_sec_timer_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1931 gt_timer_reset(env
, ri
, GTIMER_SEC
);
1934 static void gt_sec_cval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1937 gt_cval_write(env
, ri
, GTIMER_SEC
, value
);
1940 static uint64_t gt_sec_tval_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
1942 return gt_tval_read(env
, ri
, GTIMER_SEC
);
1945 static void gt_sec_tval_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1948 gt_tval_write(env
, ri
, GTIMER_SEC
, value
);
1951 static void gt_sec_ctl_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
1954 gt_ctl_write(env
, ri
, GTIMER_SEC
, value
);
1957 void arm_gt_ptimer_cb(void *opaque
)
1959 ARMCPU
*cpu
= opaque
;
1961 gt_recalc_timer(cpu
, GTIMER_PHYS
);
1964 void arm_gt_vtimer_cb(void *opaque
)
1966 ARMCPU
*cpu
= opaque
;
1968 gt_recalc_timer(cpu
, GTIMER_VIRT
);
1971 void arm_gt_htimer_cb(void *opaque
)
1973 ARMCPU
*cpu
= opaque
;
1975 gt_recalc_timer(cpu
, GTIMER_HYP
);
1978 void arm_gt_stimer_cb(void *opaque
)
1980 ARMCPU
*cpu
= opaque
;
1982 gt_recalc_timer(cpu
, GTIMER_SEC
);
1985 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
1986 /* Note that CNTFRQ is purely reads-as-written for the benefit
1987 * of software; writing it doesn't actually change the timer frequency.
1988 * Our reset value matches the fixed frequency we implement the timer at.
1990 { .name
= "CNTFRQ", .cp
= 15, .crn
= 14, .crm
= 0, .opc1
= 0, .opc2
= 0,
1991 .type
= ARM_CP_ALIAS
,
1992 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
1993 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c14_cntfrq
),
1995 { .name
= "CNTFRQ_EL0", .state
= ARM_CP_STATE_AA64
,
1996 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 0,
1997 .access
= PL1_RW
| PL0_R
, .accessfn
= gt_cntfrq_access
,
1998 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntfrq
),
1999 .resetvalue
= (1000 * 1000 * 1000) / GTIMER_SCALE
,
2001 /* overall control: mostly access permissions */
2002 { .name
= "CNTKCTL", .state
= ARM_CP_STATE_BOTH
,
2003 .opc0
= 3, .opc1
= 0, .crn
= 14, .crm
= 1, .opc2
= 0,
2005 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntkctl
),
2008 /* per-timer control */
2009 { .name
= "CNTP_CTL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
2010 .secure
= ARM_CP_SECSTATE_NS
,
2011 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
2012 .accessfn
= gt_ptimer_access
,
2013 .fieldoffset
= offsetoflow32(CPUARMState
,
2014 cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
2015 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
2017 { .name
= "CNTP_CTL_S",
2018 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 1,
2019 .secure
= ARM_CP_SECSTATE_S
,
2020 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
2021 .accessfn
= gt_ptimer_access
,
2022 .fieldoffset
= offsetoflow32(CPUARMState
,
2023 cp15
.c14_timer
[GTIMER_SEC
].ctl
),
2024 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
2026 { .name
= "CNTP_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
2027 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 1,
2028 .type
= ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2029 .accessfn
= gt_ptimer_access
,
2030 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].ctl
),
2032 .writefn
= gt_phys_ctl_write
, .raw_writefn
= raw_write
,
2034 { .name
= "CNTV_CTL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 1,
2035 .type
= ARM_CP_IO
| ARM_CP_ALIAS
, .access
= PL1_RW
| PL0_R
,
2036 .accessfn
= gt_vtimer_access
,
2037 .fieldoffset
= offsetoflow32(CPUARMState
,
2038 cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
2039 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
2041 { .name
= "CNTV_CTL_EL0", .state
= ARM_CP_STATE_AA64
,
2042 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 1,
2043 .type
= ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2044 .accessfn
= gt_vtimer_access
,
2045 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].ctl
),
2047 .writefn
= gt_virt_ctl_write
, .raw_writefn
= raw_write
,
2049 /* TimerValue views: a 32 bit downcounting view of the underlying state */
2050 { .name
= "CNTP_TVAL", .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
2051 .secure
= ARM_CP_SECSTATE_NS
,
2052 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2053 .accessfn
= gt_ptimer_access
,
2054 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
2056 { .name
= "CNTP_TVAL_S",
2057 .cp
= 15, .crn
= 14, .crm
= 2, .opc1
= 0, .opc2
= 0,
2058 .secure
= ARM_CP_SECSTATE_S
,
2059 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2060 .accessfn
= gt_ptimer_access
,
2061 .readfn
= gt_sec_tval_read
, .writefn
= gt_sec_tval_write
,
2063 { .name
= "CNTP_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2064 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 0,
2065 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2066 .accessfn
= gt_ptimer_access
, .resetfn
= gt_phys_timer_reset
,
2067 .readfn
= gt_phys_tval_read
, .writefn
= gt_phys_tval_write
,
2069 { .name
= "CNTV_TVAL", .cp
= 15, .crn
= 14, .crm
= 3, .opc1
= 0, .opc2
= 0,
2070 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2071 .accessfn
= gt_vtimer_access
,
2072 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2074 { .name
= "CNTV_TVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2075 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 0,
2076 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
| PL0_R
,
2077 .accessfn
= gt_vtimer_access
, .resetfn
= gt_virt_timer_reset
,
2078 .readfn
= gt_virt_tval_read
, .writefn
= gt_virt_tval_write
,
2080 /* The counter itself */
2081 { .name
= "CNTPCT", .cp
= 15, .crm
= 14, .opc1
= 0,
2082 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2083 .accessfn
= gt_pct_access
,
2084 .readfn
= gt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2086 { .name
= "CNTPCT_EL0", .state
= ARM_CP_STATE_AA64
,
2087 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 1,
2088 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2089 .accessfn
= gt_pct_access
, .readfn
= gt_cnt_read
,
2091 { .name
= "CNTVCT", .cp
= 15, .crm
= 14, .opc1
= 1,
2092 .access
= PL0_R
, .type
= ARM_CP_64BIT
| ARM_CP_NO_RAW
| ARM_CP_IO
,
2093 .accessfn
= gt_vct_access
,
2094 .readfn
= gt_virt_cnt_read
, .resetfn
= arm_cp_reset_ignore
,
2096 { .name
= "CNTVCT_EL0", .state
= ARM_CP_STATE_AA64
,
2097 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 2,
2098 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2099 .accessfn
= gt_vct_access
, .readfn
= gt_virt_cnt_read
,
2101 /* Comparison value, indicating when the timer goes off */
2102 { .name
= "CNTP_CVAL", .cp
= 15, .crm
= 14, .opc1
= 2,
2103 .secure
= ARM_CP_SECSTATE_NS
,
2104 .access
= PL1_RW
| PL0_R
,
2105 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2106 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2107 .accessfn
= gt_ptimer_access
,
2108 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2110 { .name
= "CNTP_CVAL_S", .cp
= 15, .crm
= 14, .opc1
= 2,
2111 .secure
= ARM_CP_SECSTATE_S
,
2112 .access
= PL1_RW
| PL0_R
,
2113 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2114 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2115 .accessfn
= gt_ptimer_access
,
2116 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2118 { .name
= "CNTP_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2119 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 2, .opc2
= 2,
2120 .access
= PL1_RW
| PL0_R
,
2122 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_PHYS
].cval
),
2123 .resetvalue
= 0, .accessfn
= gt_ptimer_access
,
2124 .writefn
= gt_phys_cval_write
, .raw_writefn
= raw_write
,
2126 { .name
= "CNTV_CVAL", .cp
= 15, .crm
= 14, .opc1
= 3,
2127 .access
= PL1_RW
| PL0_R
,
2128 .type
= ARM_CP_64BIT
| ARM_CP_IO
| ARM_CP_ALIAS
,
2129 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2130 .accessfn
= gt_vtimer_access
,
2131 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2133 { .name
= "CNTV_CVAL_EL0", .state
= ARM_CP_STATE_AA64
,
2134 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 3, .opc2
= 2,
2135 .access
= PL1_RW
| PL0_R
,
2137 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_VIRT
].cval
),
2138 .resetvalue
= 0, .accessfn
= gt_vtimer_access
,
2139 .writefn
= gt_virt_cval_write
, .raw_writefn
= raw_write
,
2141 /* Secure timer -- this is actually restricted to only EL3
2142 * and configurably Secure-EL1 via the accessfn.
2144 { .name
= "CNTPS_TVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2145 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 0,
2146 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL1_RW
,
2147 .accessfn
= gt_stimer_access
,
2148 .readfn
= gt_sec_tval_read
,
2149 .writefn
= gt_sec_tval_write
,
2150 .resetfn
= gt_sec_timer_reset
,
2152 { .name
= "CNTPS_CTL_EL1", .state
= ARM_CP_STATE_AA64
,
2153 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 1,
2154 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2155 .accessfn
= gt_stimer_access
,
2156 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].ctl
),
2158 .writefn
= gt_sec_ctl_write
, .raw_writefn
= raw_write
,
2160 { .name
= "CNTPS_CVAL_EL1", .state
= ARM_CP_STATE_AA64
,
2161 .opc0
= 3, .opc1
= 7, .crn
= 14, .crm
= 2, .opc2
= 2,
2162 .type
= ARM_CP_IO
, .access
= PL1_RW
,
2163 .accessfn
= gt_stimer_access
,
2164 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_SEC
].cval
),
2165 .writefn
= gt_sec_cval_write
, .raw_writefn
= raw_write
,
2172 /* In user-mode most of the generic timer registers are inaccessible
2173 * however modern kernels (4.12+) allow access to cntvct_el0
2176 static uint64_t gt_virt_cnt_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2178 /* Currently we have no support for QEMUTimer in linux-user so we
2179 * can't call gt_get_countervalue(env), instead we directly
2180 * call the lower level functions.
2182 return cpu_get_clock() / GTIMER_SCALE
;
2185 static const ARMCPRegInfo generic_timer_cp_reginfo
[] = {
2186 { .name
= "CNTFRQ_EL0", .state
= ARM_CP_STATE_AA64
,
2187 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 0,
2188 .type
= ARM_CP_CONST
, .access
= PL0_R
/* no PL1_RW in linux-user */,
2189 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_cntfrq
),
2190 .resetvalue
= NANOSECONDS_PER_SECOND
/ GTIMER_SCALE
,
2192 { .name
= "CNTVCT_EL0", .state
= ARM_CP_STATE_AA64
,
2193 .opc0
= 3, .opc1
= 3, .crn
= 14, .crm
= 0, .opc2
= 2,
2194 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
| ARM_CP_IO
,
2195 .readfn
= gt_virt_cnt_read
,
2202 static void par_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
2204 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2205 raw_write(env
, ri
, value
);
2206 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
2207 raw_write(env
, ri
, value
& 0xfffff6ff);
2209 raw_write(env
, ri
, value
& 0xfffff1ff);
2213 #ifndef CONFIG_USER_ONLY
2214 /* get_phys_addr() isn't present for user-mode-only targets */
2216 static CPAccessResult
ats_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2220 /* The ATS12NSO* operations must trap to EL3 if executed in
2221 * Secure EL1 (which can only happen if EL3 is AArch64).
2222 * They are simply UNDEF if executed from NS EL1.
2223 * They function normally from EL2 or EL3.
2225 if (arm_current_el(env
) == 1) {
2226 if (arm_is_secure_below_el3(env
)) {
2227 return CP_ACCESS_TRAP_UNCATEGORIZED_EL3
;
2229 return CP_ACCESS_TRAP_UNCATEGORIZED
;
2232 return CP_ACCESS_OK
;
2235 static uint64_t do_ats_write(CPUARMState
*env
, uint64_t value
,
2236 MMUAccessType access_type
, ARMMMUIdx mmu_idx
)
2239 target_ulong page_size
;
2243 bool format64
= false;
2244 MemTxAttrs attrs
= {};
2245 ARMMMUFaultInfo fi
= {};
2246 ARMCacheAttrs cacheattrs
= {};
2248 ret
= get_phys_addr(env
, value
, access_type
, mmu_idx
, &phys_addr
, &attrs
,
2249 &prot
, &page_size
, &fi
, &cacheattrs
);
2253 } else if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2256 * * TTBCR.EAE determines whether the result is returned using the
2257 * 32-bit or the 64-bit PAR format
2258 * * Instructions executed in Hyp mode always use the 64bit format
2260 * ATS1S2NSOxx uses the 64bit format if any of the following is true:
2261 * * The Non-secure TTBCR.EAE bit is set to 1
2262 * * The implementation includes EL2, and the value of HCR.VM is 1
2264 * ATS1Hx always uses the 64bit format (not supported yet).
2266 format64
= arm_s1_regime_using_lpae_format(env
, mmu_idx
);
2268 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
2269 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
2270 format64
|= env
->cp15
.hcr_el2
& HCR_VM
;
2272 format64
|= arm_current_el(env
) == 2;
2278 /* Create a 64-bit PAR */
2279 par64
= (1 << 11); /* LPAE bit always set */
2281 par64
|= phys_addr
& ~0xfffULL
;
2282 if (!attrs
.secure
) {
2283 par64
|= (1 << 9); /* NS */
2285 par64
|= (uint64_t)cacheattrs
.attrs
<< 56; /* ATTR */
2286 par64
|= cacheattrs
.shareability
<< 7; /* SH */
2288 uint32_t fsr
= arm_fi_to_lfsc(&fi
);
2291 par64
|= (fsr
& 0x3f) << 1; /* FS */
2292 /* Note that S2WLK and FSTAGE are always zero, because we don't
2293 * implement virtualization and therefore there can't be a stage 2
2298 /* fsr is a DFSR/IFSR value for the short descriptor
2299 * translation table format (with WnR always clear).
2300 * Convert it to a 32-bit PAR.
2303 /* We do not set any attribute bits in the PAR */
2304 if (page_size
== (1 << 24)
2305 && arm_feature(env
, ARM_FEATURE_V7
)) {
2306 par64
= (phys_addr
& 0xff000000) | (1 << 1);
2308 par64
= phys_addr
& 0xfffff000;
2310 if (!attrs
.secure
) {
2311 par64
|= (1 << 9); /* NS */
2314 uint32_t fsr
= arm_fi_to_sfsc(&fi
);
2316 par64
= ((fsr
& (1 << 10)) >> 5) | ((fsr
& (1 << 12)) >> 6) |
2317 ((fsr
& 0xf) << 1) | 1;
2323 static void ats_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
2325 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2328 int el
= arm_current_el(env
);
2329 bool secure
= arm_is_secure_below_el3(env
);
2331 switch (ri
->opc2
& 6) {
2333 /* stage 1 current state PL1: ATS1CPR, ATS1CPW */
2336 mmu_idx
= ARMMMUIdx_S1E3
;
2339 mmu_idx
= ARMMMUIdx_S1NSE1
;
2342 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
2345 g_assert_not_reached();
2349 /* stage 1 current state PL0: ATS1CUR, ATS1CUW */
2352 mmu_idx
= ARMMMUIdx_S1SE0
;
2355 mmu_idx
= ARMMMUIdx_S1NSE0
;
2358 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
2361 g_assert_not_reached();
2365 /* stage 1+2 NonSecure PL1: ATS12NSOPR, ATS12NSOPW */
2366 mmu_idx
= ARMMMUIdx_S12NSE1
;
2369 /* stage 1+2 NonSecure PL0: ATS12NSOUR, ATS12NSOUW */
2370 mmu_idx
= ARMMMUIdx_S12NSE0
;
2373 g_assert_not_reached();
2376 par64
= do_ats_write(env
, value
, access_type
, mmu_idx
);
2378 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
2381 static void ats1h_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2384 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2387 par64
= do_ats_write(env
, value
, access_type
, ARMMMUIdx_S2NS
);
2389 A32_BANKED_CURRENT_REG_SET(env
, par
, par64
);
2392 static CPAccessResult
at_s1e2_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2395 if (arm_current_el(env
) == 3 && !(env
->cp15
.scr_el3
& SCR_NS
)) {
2396 return CP_ACCESS_TRAP
;
2398 return CP_ACCESS_OK
;
2401 static void ats_write64(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2404 MMUAccessType access_type
= ri
->opc2
& 1 ? MMU_DATA_STORE
: MMU_DATA_LOAD
;
2406 int secure
= arm_is_secure_below_el3(env
);
2408 switch (ri
->opc2
& 6) {
2411 case 0: /* AT S1E1R, AT S1E1W */
2412 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S1NSE1
;
2414 case 4: /* AT S1E2R, AT S1E2W */
2415 mmu_idx
= ARMMMUIdx_S1E2
;
2417 case 6: /* AT S1E3R, AT S1E3W */
2418 mmu_idx
= ARMMMUIdx_S1E3
;
2421 g_assert_not_reached();
2424 case 2: /* AT S1E0R, AT S1E0W */
2425 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S1NSE0
;
2427 case 4: /* AT S12E1R, AT S12E1W */
2428 mmu_idx
= secure
? ARMMMUIdx_S1SE1
: ARMMMUIdx_S12NSE1
;
2430 case 6: /* AT S12E0R, AT S12E0W */
2431 mmu_idx
= secure
? ARMMMUIdx_S1SE0
: ARMMMUIdx_S12NSE0
;
2434 g_assert_not_reached();
2437 env
->cp15
.par_el
[1] = do_ats_write(env
, value
, access_type
, mmu_idx
);
2441 static const ARMCPRegInfo vapa_cp_reginfo
[] = {
2442 { .name
= "PAR", .cp
= 15, .crn
= 7, .crm
= 4, .opc1
= 0, .opc2
= 0,
2443 .access
= PL1_RW
, .resetvalue
= 0,
2444 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.par_s
),
2445 offsetoflow32(CPUARMState
, cp15
.par_ns
) },
2446 .writefn
= par_write
},
2447 #ifndef CONFIG_USER_ONLY
2448 /* This underdecoding is safe because the reginfo is NO_RAW. */
2449 { .name
= "ATS", .cp
= 15, .crn
= 7, .crm
= 8, .opc1
= 0, .opc2
= CP_ANY
,
2450 .access
= PL1_W
, .accessfn
= ats_access
,
2451 .writefn
= ats_write
, .type
= ARM_CP_NO_RAW
},
2456 /* Return basic MPU access permission bits. */
2457 static uint32_t simple_mpu_ap_bits(uint32_t val
)
2464 for (i
= 0; i
< 16; i
+= 2) {
2465 ret
|= (val
>> i
) & mask
;
2471 /* Pad basic MPU access permission bits to extended format. */
2472 static uint32_t extended_mpu_ap_bits(uint32_t val
)
2479 for (i
= 0; i
< 16; i
+= 2) {
2480 ret
|= (val
& mask
) << i
;
2486 static void pmsav5_data_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2489 env
->cp15
.pmsav5_data_ap
= extended_mpu_ap_bits(value
);
2492 static uint64_t pmsav5_data_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2494 return simple_mpu_ap_bits(env
->cp15
.pmsav5_data_ap
);
2497 static void pmsav5_insn_ap_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2500 env
->cp15
.pmsav5_insn_ap
= extended_mpu_ap_bits(value
);
2503 static uint64_t pmsav5_insn_ap_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2505 return simple_mpu_ap_bits(env
->cp15
.pmsav5_insn_ap
);
2508 static uint64_t pmsav7_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2510 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
2516 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
2520 static void pmsav7_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2523 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2524 uint32_t *u32p
= *(uint32_t **)raw_ptr(env
, ri
);
2530 u32p
+= env
->pmsav7
.rnr
[M_REG_NS
];
2531 tlb_flush(CPU(cpu
)); /* Mappings may have changed - purge! */
2535 static void pmsav7_rgnr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2538 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2539 uint32_t nrgs
= cpu
->pmsav7_dregion
;
2541 if (value
>= nrgs
) {
2542 qemu_log_mask(LOG_GUEST_ERROR
,
2543 "PMSAv7 RGNR write >= # supported regions, %" PRIu32
2544 " > %" PRIu32
"\n", (uint32_t)value
, nrgs
);
2548 raw_write(env
, ri
, value
);
2551 static const ARMCPRegInfo pmsav7_cp_reginfo
[] = {
2552 /* Reset for all these registers is handled in arm_cpu_reset(),
2553 * because the PMSAv7 is also used by M-profile CPUs, which do
2554 * not register cpregs but still need the state to be reset.
2556 { .name
= "DRBAR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 0,
2557 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2558 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drbar
),
2559 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2560 .resetfn
= arm_cp_reset_ignore
},
2561 { .name
= "DRSR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 2,
2562 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2563 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.drsr
),
2564 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2565 .resetfn
= arm_cp_reset_ignore
},
2566 { .name
= "DRACR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 1, .opc2
= 4,
2567 .access
= PL1_RW
, .type
= ARM_CP_NO_RAW
,
2568 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.dracr
),
2569 .readfn
= pmsav7_read
, .writefn
= pmsav7_write
,
2570 .resetfn
= arm_cp_reset_ignore
},
2571 { .name
= "RGNR", .cp
= 15, .crn
= 6, .opc1
= 0, .crm
= 2, .opc2
= 0,
2573 .fieldoffset
= offsetof(CPUARMState
, pmsav7
.rnr
[M_REG_NS
]),
2574 .writefn
= pmsav7_rgnr_write
,
2575 .resetfn
= arm_cp_reset_ignore
},
2579 static const ARMCPRegInfo pmsav5_cp_reginfo
[] = {
2580 { .name
= "DATA_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
2581 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2582 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
2583 .readfn
= pmsav5_data_ap_read
, .writefn
= pmsav5_data_ap_write
, },
2584 { .name
= "INSN_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
2585 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2586 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
2587 .readfn
= pmsav5_insn_ap_read
, .writefn
= pmsav5_insn_ap_write
, },
2588 { .name
= "DATA_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 2,
2590 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_data_ap
),
2592 { .name
= "INSN_EXT_AP", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 3,
2594 .fieldoffset
= offsetof(CPUARMState
, cp15
.pmsav5_insn_ap
),
2596 { .name
= "DCACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
2598 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_data
), .resetvalue
= 0, },
2599 { .name
= "ICACHE_CFG", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 1,
2601 .fieldoffset
= offsetof(CPUARMState
, cp15
.c2_insn
), .resetvalue
= 0, },
2602 /* Protection region base and size registers */
2603 { .name
= "946_PRBS0", .cp
= 15, .crn
= 6, .crm
= 0, .opc1
= 0,
2604 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2605 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[0]) },
2606 { .name
= "946_PRBS1", .cp
= 15, .crn
= 6, .crm
= 1, .opc1
= 0,
2607 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2608 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[1]) },
2609 { .name
= "946_PRBS2", .cp
= 15, .crn
= 6, .crm
= 2, .opc1
= 0,
2610 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2611 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[2]) },
2612 { .name
= "946_PRBS3", .cp
= 15, .crn
= 6, .crm
= 3, .opc1
= 0,
2613 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2614 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[3]) },
2615 { .name
= "946_PRBS4", .cp
= 15, .crn
= 6, .crm
= 4, .opc1
= 0,
2616 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2617 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[4]) },
2618 { .name
= "946_PRBS5", .cp
= 15, .crn
= 6, .crm
= 5, .opc1
= 0,
2619 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2620 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[5]) },
2621 { .name
= "946_PRBS6", .cp
= 15, .crn
= 6, .crm
= 6, .opc1
= 0,
2622 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2623 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[6]) },
2624 { .name
= "946_PRBS7", .cp
= 15, .crn
= 6, .crm
= 7, .opc1
= 0,
2625 .opc2
= CP_ANY
, .access
= PL1_RW
, .resetvalue
= 0,
2626 .fieldoffset
= offsetof(CPUARMState
, cp15
.c6_region
[7]) },
2630 static void vmsa_ttbcr_raw_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2633 TCR
*tcr
= raw_ptr(env
, ri
);
2634 int maskshift
= extract32(value
, 0, 3);
2636 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
2637 if (arm_feature(env
, ARM_FEATURE_LPAE
) && (value
& TTBCR_EAE
)) {
2638 /* Pre ARMv8 bits [21:19], [15:14] and [6:3] are UNK/SBZP when
2639 * using Long-desciptor translation table format */
2640 value
&= ~((7 << 19) | (3 << 14) | (0xf << 3));
2641 } else if (arm_feature(env
, ARM_FEATURE_EL3
)) {
2642 /* In an implementation that includes the Security Extensions
2643 * TTBCR has additional fields PD0 [4] and PD1 [5] for
2644 * Short-descriptor translation table format.
2646 value
&= TTBCR_PD1
| TTBCR_PD0
| TTBCR_N
;
2652 /* Update the masks corresponding to the TCR bank being written
2653 * Note that we always calculate mask and base_mask, but
2654 * they are only used for short-descriptor tables (ie if EAE is 0);
2655 * for long-descriptor tables the TCR fields are used differently
2656 * and the mask and base_mask values are meaningless.
2658 tcr
->raw_tcr
= value
;
2659 tcr
->mask
= ~(((uint32_t)0xffffffffu
) >> maskshift
);
2660 tcr
->base_mask
= ~((uint32_t)0x3fffu
>> maskshift
);
2663 static void vmsa_ttbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2666 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2668 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
2669 /* With LPAE the TTBCR could result in a change of ASID
2670 * via the TTBCR.A1 bit, so do a TLB flush.
2672 tlb_flush(CPU(cpu
));
2674 vmsa_ttbcr_raw_write(env
, ri
, value
);
2677 static void vmsa_ttbcr_reset(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2679 TCR
*tcr
= raw_ptr(env
, ri
);
2681 /* Reset both the TCR as well as the masks corresponding to the bank of
2682 * the TCR being reset.
2686 tcr
->base_mask
= 0xffffc000u
;
2689 static void vmsa_tcr_el1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2692 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2693 TCR
*tcr
= raw_ptr(env
, ri
);
2695 /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
2696 tlb_flush(CPU(cpu
));
2697 tcr
->raw_tcr
= value
;
2700 static void vmsa_ttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2703 /* 64 bit accesses to the TTBRs can change the ASID and so we
2704 * must flush the TLB.
2706 if (cpreg_field_is_64bit(ri
)) {
2707 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2709 tlb_flush(CPU(cpu
));
2711 raw_write(env
, ri
, value
);
2714 static void vttbr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2717 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2718 CPUState
*cs
= CPU(cpu
);
2720 /* Accesses to VTTBR may change the VMID so we must flush the TLB. */
2721 if (raw_read(env
, ri
) != value
) {
2722 tlb_flush_by_mmuidx(cs
,
2723 ARMMMUIdxBit_S12NSE1
|
2724 ARMMMUIdxBit_S12NSE0
|
2726 raw_write(env
, ri
, value
);
2730 static const ARMCPRegInfo vmsa_pmsa_cp_reginfo
[] = {
2731 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 0,
2732 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
,
2733 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dfsr_s
),
2734 offsetoflow32(CPUARMState
, cp15
.dfsr_ns
) }, },
2735 { .name
= "IFSR", .cp
= 15, .crn
= 5, .crm
= 0, .opc1
= 0, .opc2
= 1,
2736 .access
= PL1_RW
, .resetvalue
= 0,
2737 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.ifsr_s
),
2738 offsetoflow32(CPUARMState
, cp15
.ifsr_ns
) } },
2739 { .name
= "DFAR", .cp
= 15, .opc1
= 0, .crn
= 6, .crm
= 0, .opc2
= 0,
2740 .access
= PL1_RW
, .resetvalue
= 0,
2741 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.dfar_s
),
2742 offsetof(CPUARMState
, cp15
.dfar_ns
) } },
2743 { .name
= "FAR_EL1", .state
= ARM_CP_STATE_AA64
,
2744 .opc0
= 3, .crn
= 6, .crm
= 0, .opc1
= 0, .opc2
= 0,
2745 .access
= PL1_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[1]),
2750 static const ARMCPRegInfo vmsa_cp_reginfo
[] = {
2751 { .name
= "ESR_EL1", .state
= ARM_CP_STATE_AA64
,
2752 .opc0
= 3, .crn
= 5, .crm
= 2, .opc1
= 0, .opc2
= 0,
2754 .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[1]), .resetvalue
= 0, },
2755 { .name
= "TTBR0_EL1", .state
= ARM_CP_STATE_BOTH
,
2756 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 0,
2757 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
2758 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
2759 offsetof(CPUARMState
, cp15
.ttbr0_ns
) } },
2760 { .name
= "TTBR1_EL1", .state
= ARM_CP_STATE_BOTH
,
2761 .opc0
= 3, .opc1
= 0, .crn
= 2, .crm
= 0, .opc2
= 1,
2762 .access
= PL1_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
2763 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
2764 offsetof(CPUARMState
, cp15
.ttbr1_ns
) } },
2765 { .name
= "TCR_EL1", .state
= ARM_CP_STATE_AA64
,
2766 .opc0
= 3, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
2767 .access
= PL1_RW
, .writefn
= vmsa_tcr_el1_write
,
2768 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= raw_write
,
2769 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[1]) },
2770 { .name
= "TTBCR", .cp
= 15, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 2,
2771 .access
= PL1_RW
, .type
= ARM_CP_ALIAS
, .writefn
= vmsa_ttbcr_write
,
2772 .raw_writefn
= vmsa_ttbcr_raw_write
,
2773 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.tcr_el
[3]),
2774 offsetoflow32(CPUARMState
, cp15
.tcr_el
[1])} },
2778 static void omap_ticonfig_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2781 env
->cp15
.c15_ticonfig
= value
& 0xe7;
2782 /* The OS_TYPE bit in this register changes the reported CPUID! */
2783 env
->cp15
.c0_cpuid
= (value
& (1 << 5)) ?
2784 ARM_CPUID_TI915T
: ARM_CPUID_TI925T
;
2787 static void omap_threadid_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2790 env
->cp15
.c15_threadid
= value
& 0xffff;
2793 static void omap_wfi_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2796 /* Wait-for-interrupt (deprecated) */
2797 cpu_interrupt(CPU(arm_env_get_cpu(env
)), CPU_INTERRUPT_HALT
);
2800 static void omap_cachemaint_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2803 /* On OMAP there are registers indicating the max/min index of dcache lines
2804 * containing a dirty line; cache flush operations have to reset these.
2806 env
->cp15
.c15_i_max
= 0x000;
2807 env
->cp15
.c15_i_min
= 0xff0;
2810 static const ARMCPRegInfo omap_cp_reginfo
[] = {
2811 { .name
= "DFSR", .cp
= 15, .crn
= 5, .crm
= CP_ANY
,
2812 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
, .type
= ARM_CP_OVERRIDE
,
2813 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.esr_el
[1]),
2815 { .name
= "", .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 0, .opc2
= 0,
2816 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
2817 { .name
= "TICONFIG", .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0,
2819 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_ticonfig
), .resetvalue
= 0,
2820 .writefn
= omap_ticonfig_write
},
2821 { .name
= "IMAX", .cp
= 15, .crn
= 15, .crm
= 2, .opc1
= 0, .opc2
= 0,
2823 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_max
), .resetvalue
= 0, },
2824 { .name
= "IMIN", .cp
= 15, .crn
= 15, .crm
= 3, .opc1
= 0, .opc2
= 0,
2825 .access
= PL1_RW
, .resetvalue
= 0xff0,
2826 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_i_min
) },
2827 { .name
= "THREADID", .cp
= 15, .crn
= 15, .crm
= 4, .opc1
= 0, .opc2
= 0,
2829 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_threadid
), .resetvalue
= 0,
2830 .writefn
= omap_threadid_write
},
2831 { .name
= "TI925T_STATUS", .cp
= 15, .crn
= 15,
2832 .crm
= 8, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
2833 .type
= ARM_CP_NO_RAW
,
2834 .readfn
= arm_cp_read_zero
, .writefn
= omap_wfi_write
, },
2835 /* TODO: Peripheral port remap register:
2836 * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
2837 * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
2840 { .name
= "OMAP_CACHEMAINT", .cp
= 15, .crn
= 7, .crm
= CP_ANY
,
2841 .opc1
= 0, .opc2
= CP_ANY
, .access
= PL1_W
,
2842 .type
= ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
,
2843 .writefn
= omap_cachemaint_write
},
2844 { .name
= "C9", .cp
= 15, .crn
= 9,
2845 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_RW
,
2846 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
, .resetvalue
= 0 },
2850 static void xscale_cpar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
2853 env
->cp15
.c15_cpar
= value
& 0x3fff;
2856 static const ARMCPRegInfo xscale_cp_reginfo
[] = {
2857 { .name
= "XSCALE_CPAR",
2858 .cp
= 15, .crn
= 15, .crm
= 1, .opc1
= 0, .opc2
= 0, .access
= PL1_RW
,
2859 .fieldoffset
= offsetof(CPUARMState
, cp15
.c15_cpar
), .resetvalue
= 0,
2860 .writefn
= xscale_cpar_write
, },
2861 { .name
= "XSCALE_AUXCR",
2862 .cp
= 15, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 1, .access
= PL1_RW
,
2863 .fieldoffset
= offsetof(CPUARMState
, cp15
.c1_xscaleauxcr
),
2865 /* XScale specific cache-lockdown: since we have no cache we NOP these
2866 * and hope the guest does not really rely on cache behaviour.
2868 { .name
= "XSCALE_LOCK_ICACHE_LINE",
2869 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 0,
2870 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2871 { .name
= "XSCALE_UNLOCK_ICACHE",
2872 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 1, .opc2
= 1,
2873 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2874 { .name
= "XSCALE_DCACHE_LOCK",
2875 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 0,
2876 .access
= PL1_RW
, .type
= ARM_CP_NOP
},
2877 { .name
= "XSCALE_UNLOCK_DCACHE",
2878 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 2, .opc2
= 1,
2879 .access
= PL1_W
, .type
= ARM_CP_NOP
},
2883 static const ARMCPRegInfo dummy_c15_cp_reginfo
[] = {
2884 /* RAZ/WI the whole crn=15 space, when we don't have a more specific
2885 * implementation of this implementation-defined space.
2886 * Ideally this should eventually disappear in favour of actually
2887 * implementing the correct behaviour for all cores.
2889 { .name
= "C15_IMPDEF", .cp
= 15, .crn
= 15,
2890 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
2892 .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
| ARM_CP_OVERRIDE
,
2897 static const ARMCPRegInfo cache_dirty_status_cp_reginfo
[] = {
2898 /* Cache status: RAZ because we have no cache so it's always clean */
2899 { .name
= "CDSR", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 6,
2900 .access
= PL1_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2905 static const ARMCPRegInfo cache_block_ops_cp_reginfo
[] = {
2906 /* We never have a a block transfer operation in progress */
2907 { .name
= "BXSR", .cp
= 15, .crn
= 7, .crm
= 12, .opc1
= 0, .opc2
= 4,
2908 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2910 /* The cache ops themselves: these all NOP for QEMU */
2911 { .name
= "IICR", .cp
= 15, .crm
= 5, .opc1
= 0,
2912 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2913 { .name
= "IDCR", .cp
= 15, .crm
= 6, .opc1
= 0,
2914 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2915 { .name
= "CDCR", .cp
= 15, .crm
= 12, .opc1
= 0,
2916 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2917 { .name
= "PIR", .cp
= 15, .crm
= 12, .opc1
= 1,
2918 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2919 { .name
= "PDR", .cp
= 15, .crm
= 12, .opc1
= 2,
2920 .access
= PL0_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2921 { .name
= "CIDCR", .cp
= 15, .crm
= 14, .opc1
= 0,
2922 .access
= PL1_W
, .type
= ARM_CP_NOP
|ARM_CP_64BIT
},
2926 static const ARMCPRegInfo cache_test_clean_cp_reginfo
[] = {
2927 /* The cache test-and-clean instructions always return (1 << 30)
2928 * to indicate that there are no dirty cache lines.
2930 { .name
= "TC_DCACHE", .cp
= 15, .crn
= 7, .crm
= 10, .opc1
= 0, .opc2
= 3,
2931 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2932 .resetvalue
= (1 << 30) },
2933 { .name
= "TCI_DCACHE", .cp
= 15, .crn
= 7, .crm
= 14, .opc1
= 0, .opc2
= 3,
2934 .access
= PL0_R
, .type
= ARM_CP_CONST
| ARM_CP_NO_RAW
,
2935 .resetvalue
= (1 << 30) },
2939 static const ARMCPRegInfo strongarm_cp_reginfo
[] = {
2940 /* Ignore ReadBuffer accesses */
2941 { .name
= "C9_READBUFFER", .cp
= 15, .crn
= 9,
2942 .crm
= CP_ANY
, .opc1
= CP_ANY
, .opc2
= CP_ANY
,
2943 .access
= PL1_RW
, .resetvalue
= 0,
2944 .type
= ARM_CP_CONST
| ARM_CP_OVERRIDE
| ARM_CP_NO_RAW
},
2948 static uint64_t midr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2950 ARMCPU
*cpu
= arm_env_get_cpu(env
);
2951 unsigned int cur_el
= arm_current_el(env
);
2952 bool secure
= arm_is_secure(env
);
2954 if (arm_feature(&cpu
->env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
2955 return env
->cp15
.vpidr_el2
;
2957 return raw_read(env
, ri
);
2960 static uint64_t mpidr_read_val(CPUARMState
*env
)
2962 ARMCPU
*cpu
= ARM_CPU(arm_env_get_cpu(env
));
2963 uint64_t mpidr
= cpu
->mp_affinity
;
2965 if (arm_feature(env
, ARM_FEATURE_V7MP
)) {
2966 mpidr
|= (1U << 31);
2967 /* Cores which are uniprocessor (non-coherent)
2968 * but still implement the MP extensions set
2969 * bit 30. (For instance, Cortex-R5).
2971 if (cpu
->mp_is_up
) {
2972 mpidr
|= (1u << 30);
2978 static uint64_t mpidr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
2980 unsigned int cur_el
= arm_current_el(env
);
2981 bool secure
= arm_is_secure(env
);
2983 if (arm_feature(env
, ARM_FEATURE_EL2
) && !secure
&& cur_el
== 1) {
2984 return env
->cp15
.vmpidr_el2
;
2986 return mpidr_read_val(env
);
2989 static const ARMCPRegInfo mpidr_cp_reginfo
[] = {
2990 { .name
= "MPIDR", .state
= ARM_CP_STATE_BOTH
,
2991 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 5,
2992 .access
= PL1_R
, .readfn
= mpidr_read
, .type
= ARM_CP_NO_RAW
},
2996 static const ARMCPRegInfo lpae_cp_reginfo
[] = {
2998 { .name
= "AMAIR0", .state
= ARM_CP_STATE_BOTH
,
2999 .opc0
= 3, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 0,
3000 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
3002 /* AMAIR1 is mapped to AMAIR_EL1[63:32] */
3003 { .name
= "AMAIR1", .cp
= 15, .crn
= 10, .crm
= 3, .opc1
= 0, .opc2
= 1,
3004 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
3006 { .name
= "PAR", .cp
= 15, .crm
= 7, .opc1
= 0,
3007 .access
= PL1_RW
, .type
= ARM_CP_64BIT
, .resetvalue
= 0,
3008 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.par_s
),
3009 offsetof(CPUARMState
, cp15
.par_ns
)} },
3010 { .name
= "TTBR0", .cp
= 15, .crm
= 2, .opc1
= 0,
3011 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3012 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr0_s
),
3013 offsetof(CPUARMState
, cp15
.ttbr0_ns
) },
3014 .writefn
= vmsa_ttbr_write
, },
3015 { .name
= "TTBR1", .cp
= 15, .crm
= 2, .opc1
= 1,
3016 .access
= PL1_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3017 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.ttbr1_s
),
3018 offsetof(CPUARMState
, cp15
.ttbr1_ns
) },
3019 .writefn
= vmsa_ttbr_write
, },
3023 static uint64_t aa64_fpcr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3025 return vfp_get_fpcr(env
);
3028 static void aa64_fpcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3031 vfp_set_fpcr(env
, value
);
3034 static uint64_t aa64_fpsr_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3036 return vfp_get_fpsr(env
);
3039 static void aa64_fpsr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3042 vfp_set_fpsr(env
, value
);
3045 static CPAccessResult
aa64_daif_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3048 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UMA
)) {
3049 return CP_ACCESS_TRAP
;
3051 return CP_ACCESS_OK
;
3054 static void aa64_daif_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3057 env
->daif
= value
& PSTATE_DAIF
;
3060 static CPAccessResult
aa64_cacheop_access(CPUARMState
*env
,
3061 const ARMCPRegInfo
*ri
,
3064 /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
3065 * SCTLR_EL1.UCI is set.
3067 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCI
)) {
3068 return CP_ACCESS_TRAP
;
3070 return CP_ACCESS_OK
;
3073 /* See: D4.7.2 TLB maintenance requirements and the TLB maintenance instructions
3074 * Page D4-1736 (DDI0487A.b)
3077 static void tlbi_aa64_vmalle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3080 CPUState
*cs
= ENV_GET_CPU(env
);
3082 if (arm_is_secure_below_el3(env
)) {
3083 tlb_flush_by_mmuidx(cs
,
3084 ARMMMUIdxBit_S1SE1
|
3085 ARMMMUIdxBit_S1SE0
);
3087 tlb_flush_by_mmuidx(cs
,
3088 ARMMMUIdxBit_S12NSE1
|
3089 ARMMMUIdxBit_S12NSE0
);
3093 static void tlbi_aa64_vmalle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3096 CPUState
*cs
= ENV_GET_CPU(env
);
3097 bool sec
= arm_is_secure_below_el3(env
);
3100 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3101 ARMMMUIdxBit_S1SE1
|
3102 ARMMMUIdxBit_S1SE0
);
3104 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3105 ARMMMUIdxBit_S12NSE1
|
3106 ARMMMUIdxBit_S12NSE0
);
3110 static void tlbi_aa64_alle1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3113 /* Note that the 'ALL' scope must invalidate both stage 1 and
3114 * stage 2 translations, whereas most other scopes only invalidate
3115 * stage 1 translations.
3117 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3118 CPUState
*cs
= CPU(cpu
);
3120 if (arm_is_secure_below_el3(env
)) {
3121 tlb_flush_by_mmuidx(cs
,
3122 ARMMMUIdxBit_S1SE1
|
3123 ARMMMUIdxBit_S1SE0
);
3125 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
3126 tlb_flush_by_mmuidx(cs
,
3127 ARMMMUIdxBit_S12NSE1
|
3128 ARMMMUIdxBit_S12NSE0
|
3131 tlb_flush_by_mmuidx(cs
,
3132 ARMMMUIdxBit_S12NSE1
|
3133 ARMMMUIdxBit_S12NSE0
);
3138 static void tlbi_aa64_alle2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3141 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3142 CPUState
*cs
= CPU(cpu
);
3144 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E2
);
3147 static void tlbi_aa64_alle3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3150 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3151 CPUState
*cs
= CPU(cpu
);
3153 tlb_flush_by_mmuidx(cs
, ARMMMUIdxBit_S1E3
);
3156 static void tlbi_aa64_alle1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3159 /* Note that the 'ALL' scope must invalidate both stage 1 and
3160 * stage 2 translations, whereas most other scopes only invalidate
3161 * stage 1 translations.
3163 CPUState
*cs
= ENV_GET_CPU(env
);
3164 bool sec
= arm_is_secure_below_el3(env
);
3165 bool has_el2
= arm_feature(env
, ARM_FEATURE_EL2
);
3168 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3169 ARMMMUIdxBit_S1SE1
|
3170 ARMMMUIdxBit_S1SE0
);
3171 } else if (has_el2
) {
3172 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3173 ARMMMUIdxBit_S12NSE1
|
3174 ARMMMUIdxBit_S12NSE0
|
3177 tlb_flush_by_mmuidx_all_cpus_synced(cs
,
3178 ARMMMUIdxBit_S12NSE1
|
3179 ARMMMUIdxBit_S12NSE0
);
3183 static void tlbi_aa64_alle2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3186 CPUState
*cs
= ENV_GET_CPU(env
);
3188 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E2
);
3191 static void tlbi_aa64_alle3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3194 CPUState
*cs
= ENV_GET_CPU(env
);
3196 tlb_flush_by_mmuidx_all_cpus_synced(cs
, ARMMMUIdxBit_S1E3
);
3199 static void tlbi_aa64_vae1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3202 /* Invalidate by VA, EL1&0 (AArch64 version).
3203 * Currently handles all of VAE1, VAAE1, VAALE1 and VALE1,
3204 * since we don't support flush-for-specific-ASID-only or
3205 * flush-last-level-only.
3207 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3208 CPUState
*cs
= CPU(cpu
);
3209 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3211 if (arm_is_secure_below_el3(env
)) {
3212 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3213 ARMMMUIdxBit_S1SE1
|
3214 ARMMMUIdxBit_S1SE0
);
3216 tlb_flush_page_by_mmuidx(cs
, pageaddr
,
3217 ARMMMUIdxBit_S12NSE1
|
3218 ARMMMUIdxBit_S12NSE0
);
3222 static void tlbi_aa64_vae2_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3225 /* Invalidate by VA, EL2
3226 * Currently handles both VAE2 and VALE2, since we don't support
3227 * flush-last-level-only.
3229 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3230 CPUState
*cs
= CPU(cpu
);
3231 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3233 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E2
);
3236 static void tlbi_aa64_vae3_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3239 /* Invalidate by VA, EL3
3240 * Currently handles both VAE3 and VALE3, since we don't support
3241 * flush-last-level-only.
3243 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3244 CPUState
*cs
= CPU(cpu
);
3245 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3247 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S1E3
);
3250 static void tlbi_aa64_vae1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3253 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3254 CPUState
*cs
= CPU(cpu
);
3255 bool sec
= arm_is_secure_below_el3(env
);
3256 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3259 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3260 ARMMMUIdxBit_S1SE1
|
3261 ARMMMUIdxBit_S1SE0
);
3263 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3264 ARMMMUIdxBit_S12NSE1
|
3265 ARMMMUIdxBit_S12NSE0
);
3269 static void tlbi_aa64_vae2is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3272 CPUState
*cs
= ENV_GET_CPU(env
);
3273 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3275 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3279 static void tlbi_aa64_vae3is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3282 CPUState
*cs
= ENV_GET_CPU(env
);
3283 uint64_t pageaddr
= sextract64(value
<< 12, 0, 56);
3285 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3289 static void tlbi_aa64_ipas2e1_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3292 /* Invalidate by IPA. This has to invalidate any structures that
3293 * contain only stage 2 translation information, but does not need
3294 * to apply to structures that contain combined stage 1 and stage 2
3295 * translation information.
3296 * This must NOP if EL2 isn't implemented or SCR_EL3.NS is zero.
3298 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3299 CPUState
*cs
= CPU(cpu
);
3302 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
3306 pageaddr
= sextract64(value
<< 12, 0, 48);
3308 tlb_flush_page_by_mmuidx(cs
, pageaddr
, ARMMMUIdxBit_S2NS
);
3311 static void tlbi_aa64_ipas2e1is_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3314 CPUState
*cs
= ENV_GET_CPU(env
);
3317 if (!arm_feature(env
, ARM_FEATURE_EL2
) || !(env
->cp15
.scr_el3
& SCR_NS
)) {
3321 pageaddr
= sextract64(value
<< 12, 0, 48);
3323 tlb_flush_page_by_mmuidx_all_cpus_synced(cs
, pageaddr
,
3327 static CPAccessResult
aa64_zva_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3330 /* We don't implement EL2, so the only control on DC ZVA is the
3331 * bit in the SCTLR which can prohibit access for EL0.
3333 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_DZE
)) {
3334 return CP_ACCESS_TRAP
;
3336 return CP_ACCESS_OK
;
3339 static uint64_t aa64_dczid_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3341 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3342 int dzp_bit
= 1 << 4;
3344 /* DZP indicates whether DC ZVA access is allowed */
3345 if (aa64_zva_access(env
, NULL
, false) == CP_ACCESS_OK
) {
3348 return cpu
->dcz_blocksize
| dzp_bit
;
3351 static CPAccessResult
sp_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3354 if (!(env
->pstate
& PSTATE_SP
)) {
3355 /* Access to SP_EL0 is undefined if it's being used as
3356 * the stack pointer.
3358 return CP_ACCESS_TRAP_UNCATEGORIZED
;
3360 return CP_ACCESS_OK
;
3363 static uint64_t spsel_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
3365 return env
->pstate
& PSTATE_SP
;
3368 static void spsel_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t val
)
3370 update_spsel(env
, val
);
3373 static void sctlr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3376 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3378 if (raw_read(env
, ri
) == value
) {
3379 /* Skip the TLB flush if nothing actually changed; Linux likes
3380 * to do a lot of pointless SCTLR writes.
3385 if (arm_feature(env
, ARM_FEATURE_PMSA
) && !cpu
->has_mpu
) {
3386 /* M bit is RAZ/WI for PMSA with no MPU implemented */
3390 raw_write(env
, ri
, value
);
3391 /* ??? Lots of these bits are not implemented. */
3392 /* This may enable/disable the MMU, so do a TLB flush. */
3393 tlb_flush(CPU(cpu
));
3396 static CPAccessResult
fpexc32_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3399 if ((env
->cp15
.cptr_el
[2] & CPTR_TFP
) && arm_current_el(env
) == 2) {
3400 return CP_ACCESS_TRAP_FP_EL2
;
3402 if (env
->cp15
.cptr_el
[3] & CPTR_TFP
) {
3403 return CP_ACCESS_TRAP_FP_EL3
;
3405 return CP_ACCESS_OK
;
3408 static void sdcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
3411 env
->cp15
.mdcr_el3
= value
& SDCR_VALID_MASK
;
3414 static const ARMCPRegInfo v8_cp_reginfo
[] = {
3415 /* Minimal set of EL0-visible registers. This will need to be expanded
3416 * significantly for system emulation of AArch64 CPUs.
3418 { .name
= "NZCV", .state
= ARM_CP_STATE_AA64
,
3419 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 2,
3420 .access
= PL0_RW
, .type
= ARM_CP_NZCV
},
3421 { .name
= "DAIF", .state
= ARM_CP_STATE_AA64
,
3422 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 2,
3423 .type
= ARM_CP_NO_RAW
,
3424 .access
= PL0_RW
, .accessfn
= aa64_daif_access
,
3425 .fieldoffset
= offsetof(CPUARMState
, daif
),
3426 .writefn
= aa64_daif_write
, .resetfn
= arm_cp_reset_ignore
},
3427 { .name
= "FPCR", .state
= ARM_CP_STATE_AA64
,
3428 .opc0
= 3, .opc1
= 3, .opc2
= 0, .crn
= 4, .crm
= 4,
3429 .access
= PL0_RW
, .type
= ARM_CP_FPU
| ARM_CP_SUPPRESS_TB_END
,
3430 .readfn
= aa64_fpcr_read
, .writefn
= aa64_fpcr_write
},
3431 { .name
= "FPSR", .state
= ARM_CP_STATE_AA64
,
3432 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 4, .crm
= 4,
3433 .access
= PL0_RW
, .type
= ARM_CP_FPU
| ARM_CP_SUPPRESS_TB_END
,
3434 .readfn
= aa64_fpsr_read
, .writefn
= aa64_fpsr_write
},
3435 { .name
= "DCZID_EL0", .state
= ARM_CP_STATE_AA64
,
3436 .opc0
= 3, .opc1
= 3, .opc2
= 7, .crn
= 0, .crm
= 0,
3437 .access
= PL0_R
, .type
= ARM_CP_NO_RAW
,
3438 .readfn
= aa64_dczid_read
},
3439 { .name
= "DC_ZVA", .state
= ARM_CP_STATE_AA64
,
3440 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 4, .opc2
= 1,
3441 .access
= PL0_W
, .type
= ARM_CP_DC_ZVA
,
3442 #ifndef CONFIG_USER_ONLY
3443 /* Avoid overhead of an access check that always passes in user-mode */
3444 .accessfn
= aa64_zva_access
,
3447 { .name
= "CURRENTEL", .state
= ARM_CP_STATE_AA64
,
3448 .opc0
= 3, .opc1
= 0, .opc2
= 2, .crn
= 4, .crm
= 2,
3449 .access
= PL1_R
, .type
= ARM_CP_CURRENTEL
},
3450 /* Cache ops: all NOPs since we don't emulate caches */
3451 { .name
= "IC_IALLUIS", .state
= ARM_CP_STATE_AA64
,
3452 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
3453 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3454 { .name
= "IC_IALLU", .state
= ARM_CP_STATE_AA64
,
3455 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
3456 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3457 { .name
= "IC_IVAU", .state
= ARM_CP_STATE_AA64
,
3458 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 5, .opc2
= 1,
3459 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3460 .accessfn
= aa64_cacheop_access
},
3461 { .name
= "DC_IVAC", .state
= ARM_CP_STATE_AA64
,
3462 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
3463 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3464 { .name
= "DC_ISW", .state
= ARM_CP_STATE_AA64
,
3465 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
3466 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3467 { .name
= "DC_CVAC", .state
= ARM_CP_STATE_AA64
,
3468 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 10, .opc2
= 1,
3469 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3470 .accessfn
= aa64_cacheop_access
},
3471 { .name
= "DC_CSW", .state
= ARM_CP_STATE_AA64
,
3472 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
3473 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3474 { .name
= "DC_CVAU", .state
= ARM_CP_STATE_AA64
,
3475 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 11, .opc2
= 1,
3476 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3477 .accessfn
= aa64_cacheop_access
},
3478 { .name
= "DC_CIVAC", .state
= ARM_CP_STATE_AA64
,
3479 .opc0
= 1, .opc1
= 3, .crn
= 7, .crm
= 14, .opc2
= 1,
3480 .access
= PL0_W
, .type
= ARM_CP_NOP
,
3481 .accessfn
= aa64_cacheop_access
},
3482 { .name
= "DC_CISW", .state
= ARM_CP_STATE_AA64
,
3483 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
3484 .access
= PL1_W
, .type
= ARM_CP_NOP
},
3485 /* TLBI operations */
3486 { .name
= "TLBI_VMALLE1IS", .state
= ARM_CP_STATE_AA64
,
3487 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 0,
3488 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3489 .writefn
= tlbi_aa64_vmalle1is_write
},
3490 { .name
= "TLBI_VAE1IS", .state
= ARM_CP_STATE_AA64
,
3491 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 1,
3492 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3493 .writefn
= tlbi_aa64_vae1is_write
},
3494 { .name
= "TLBI_ASIDE1IS", .state
= ARM_CP_STATE_AA64
,
3495 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 2,
3496 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3497 .writefn
= tlbi_aa64_vmalle1is_write
},
3498 { .name
= "TLBI_VAAE1IS", .state
= ARM_CP_STATE_AA64
,
3499 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 3,
3500 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3501 .writefn
= tlbi_aa64_vae1is_write
},
3502 { .name
= "TLBI_VALE1IS", .state
= ARM_CP_STATE_AA64
,
3503 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
3504 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3505 .writefn
= tlbi_aa64_vae1is_write
},
3506 { .name
= "TLBI_VAALE1IS", .state
= ARM_CP_STATE_AA64
,
3507 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
3508 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3509 .writefn
= tlbi_aa64_vae1is_write
},
3510 { .name
= "TLBI_VMALLE1", .state
= ARM_CP_STATE_AA64
,
3511 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 0,
3512 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3513 .writefn
= tlbi_aa64_vmalle1_write
},
3514 { .name
= "TLBI_VAE1", .state
= ARM_CP_STATE_AA64
,
3515 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 1,
3516 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3517 .writefn
= tlbi_aa64_vae1_write
},
3518 { .name
= "TLBI_ASIDE1", .state
= ARM_CP_STATE_AA64
,
3519 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 2,
3520 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3521 .writefn
= tlbi_aa64_vmalle1_write
},
3522 { .name
= "TLBI_VAAE1", .state
= ARM_CP_STATE_AA64
,
3523 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 3,
3524 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3525 .writefn
= tlbi_aa64_vae1_write
},
3526 { .name
= "TLBI_VALE1", .state
= ARM_CP_STATE_AA64
,
3527 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
3528 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3529 .writefn
= tlbi_aa64_vae1_write
},
3530 { .name
= "TLBI_VAALE1", .state
= ARM_CP_STATE_AA64
,
3531 .opc0
= 1, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
3532 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
3533 .writefn
= tlbi_aa64_vae1_write
},
3534 { .name
= "TLBI_IPAS2E1IS", .state
= ARM_CP_STATE_AA64
,
3535 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
3536 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3537 .writefn
= tlbi_aa64_ipas2e1is_write
},
3538 { .name
= "TLBI_IPAS2LE1IS", .state
= ARM_CP_STATE_AA64
,
3539 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
3540 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3541 .writefn
= tlbi_aa64_ipas2e1is_write
},
3542 { .name
= "TLBI_ALLE1IS", .state
= ARM_CP_STATE_AA64
,
3543 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
3544 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3545 .writefn
= tlbi_aa64_alle1is_write
},
3546 { .name
= "TLBI_VMALLS12E1IS", .state
= ARM_CP_STATE_AA64
,
3547 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 6,
3548 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3549 .writefn
= tlbi_aa64_alle1is_write
},
3550 { .name
= "TLBI_IPAS2E1", .state
= ARM_CP_STATE_AA64
,
3551 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
3552 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3553 .writefn
= tlbi_aa64_ipas2e1_write
},
3554 { .name
= "TLBI_IPAS2LE1", .state
= ARM_CP_STATE_AA64
,
3555 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
3556 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3557 .writefn
= tlbi_aa64_ipas2e1_write
},
3558 { .name
= "TLBI_ALLE1", .state
= ARM_CP_STATE_AA64
,
3559 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
3560 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3561 .writefn
= tlbi_aa64_alle1_write
},
3562 { .name
= "TLBI_VMALLS12E1", .state
= ARM_CP_STATE_AA64
,
3563 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 6,
3564 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
3565 .writefn
= tlbi_aa64_alle1is_write
},
3566 #ifndef CONFIG_USER_ONLY
3567 /* 64 bit address translation operations */
3568 { .name
= "AT_S1E1R", .state
= ARM_CP_STATE_AA64
,
3569 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 0,
3570 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3571 { .name
= "AT_S1E1W", .state
= ARM_CP_STATE_AA64
,
3572 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 1,
3573 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3574 { .name
= "AT_S1E0R", .state
= ARM_CP_STATE_AA64
,
3575 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 2,
3576 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3577 { .name
= "AT_S1E0W", .state
= ARM_CP_STATE_AA64
,
3578 .opc0
= 1, .opc1
= 0, .crn
= 7, .crm
= 8, .opc2
= 3,
3579 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3580 { .name
= "AT_S12E1R", .state
= ARM_CP_STATE_AA64
,
3581 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 4,
3582 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3583 { .name
= "AT_S12E1W", .state
= ARM_CP_STATE_AA64
,
3584 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 5,
3585 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3586 { .name
= "AT_S12E0R", .state
= ARM_CP_STATE_AA64
,
3587 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 6,
3588 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3589 { .name
= "AT_S12E0W", .state
= ARM_CP_STATE_AA64
,
3590 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 7,
3591 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3592 /* AT S1E2* are elsewhere as they UNDEF from EL3 if EL2 is not present */
3593 { .name
= "AT_S1E3R", .state
= ARM_CP_STATE_AA64
,
3594 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 0,
3595 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3596 { .name
= "AT_S1E3W", .state
= ARM_CP_STATE_AA64
,
3597 .opc0
= 1, .opc1
= 6, .crn
= 7, .crm
= 8, .opc2
= 1,
3598 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
3599 { .name
= "PAR_EL1", .state
= ARM_CP_STATE_AA64
,
3600 .type
= ARM_CP_ALIAS
,
3601 .opc0
= 3, .opc1
= 0, .crn
= 7, .crm
= 4, .opc2
= 0,
3602 .access
= PL1_RW
, .resetvalue
= 0,
3603 .fieldoffset
= offsetof(CPUARMState
, cp15
.par_el
[1]),
3604 .writefn
= par_write
},
3606 /* TLB invalidate last level of translation table walk */
3607 { .name
= "TLBIMVALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 5,
3608 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_is_write
},
3609 { .name
= "TLBIMVAALIS", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 3, .opc2
= 7,
3610 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
,
3611 .writefn
= tlbimvaa_is_write
},
3612 { .name
= "TLBIMVAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 5,
3613 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimva_write
},
3614 { .name
= "TLBIMVAAL", .cp
= 15, .opc1
= 0, .crn
= 8, .crm
= 7, .opc2
= 7,
3615 .type
= ARM_CP_NO_RAW
, .access
= PL1_W
, .writefn
= tlbimvaa_write
},
3616 { .name
= "TLBIMVALH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
3617 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3618 .writefn
= tlbimva_hyp_write
},
3619 { .name
= "TLBIMVALHIS",
3620 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
3621 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3622 .writefn
= tlbimva_hyp_is_write
},
3623 { .name
= "TLBIIPAS2",
3624 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 1,
3625 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3626 .writefn
= tlbiipas2_write
},
3627 { .name
= "TLBIIPAS2IS",
3628 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 1,
3629 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3630 .writefn
= tlbiipas2_is_write
},
3631 { .name
= "TLBIIPAS2L",
3632 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 4, .opc2
= 5,
3633 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3634 .writefn
= tlbiipas2_write
},
3635 { .name
= "TLBIIPAS2LIS",
3636 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 0, .opc2
= 5,
3637 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3638 .writefn
= tlbiipas2_is_write
},
3639 /* 32 bit cache operations */
3640 { .name
= "ICIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 0,
3641 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3642 { .name
= "BPIALLUIS", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 1, .opc2
= 6,
3643 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3644 { .name
= "ICIALLU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 0,
3645 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3646 { .name
= "ICIMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 1,
3647 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3648 { .name
= "BPIALL", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 6,
3649 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3650 { .name
= "BPIMVA", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 5, .opc2
= 7,
3651 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3652 { .name
= "DCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 1,
3653 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3654 { .name
= "DCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 6, .opc2
= 2,
3655 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3656 { .name
= "DCCMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 1,
3657 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3658 { .name
= "DCCSW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 10, .opc2
= 2,
3659 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3660 { .name
= "DCCMVAU", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 11, .opc2
= 1,
3661 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3662 { .name
= "DCCIMVAC", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 1,
3663 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3664 { .name
= "DCCISW", .cp
= 15, .opc1
= 0, .crn
= 7, .crm
= 14, .opc2
= 2,
3665 .type
= ARM_CP_NOP
, .access
= PL1_W
},
3666 /* MMU Domain access control / MPU write buffer control */
3667 { .name
= "DACR", .cp
= 15, .opc1
= 0, .crn
= 3, .crm
= 0, .opc2
= 0,
3668 .access
= PL1_RW
, .resetvalue
= 0,
3669 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
3670 .bank_fieldoffsets
= { offsetoflow32(CPUARMState
, cp15
.dacr_s
),
3671 offsetoflow32(CPUARMState
, cp15
.dacr_ns
) } },
3672 { .name
= "ELR_EL1", .state
= ARM_CP_STATE_AA64
,
3673 .type
= ARM_CP_ALIAS
,
3674 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 1,
3676 .fieldoffset
= offsetof(CPUARMState
, elr_el
[1]) },
3677 { .name
= "SPSR_EL1", .state
= ARM_CP_STATE_AA64
,
3678 .type
= ARM_CP_ALIAS
,
3679 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 0, .opc2
= 0,
3681 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_SVC
]) },
3682 /* We rely on the access checks not allowing the guest to write to the
3683 * state field when SPSel indicates that it's being used as the stack
3686 { .name
= "SP_EL0", .state
= ARM_CP_STATE_AA64
,
3687 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 1, .opc2
= 0,
3688 .access
= PL1_RW
, .accessfn
= sp_el0_access
,
3689 .type
= ARM_CP_ALIAS
,
3690 .fieldoffset
= offsetof(CPUARMState
, sp_el
[0]) },
3691 { .name
= "SP_EL1", .state
= ARM_CP_STATE_AA64
,
3692 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 1, .opc2
= 0,
3693 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
3694 .fieldoffset
= offsetof(CPUARMState
, sp_el
[1]) },
3695 { .name
= "SPSel", .state
= ARM_CP_STATE_AA64
,
3696 .opc0
= 3, .opc1
= 0, .crn
= 4, .crm
= 2, .opc2
= 0,
3697 .type
= ARM_CP_NO_RAW
,
3698 .access
= PL1_RW
, .readfn
= spsel_read
, .writefn
= spsel_write
},
3699 { .name
= "FPEXC32_EL2", .state
= ARM_CP_STATE_AA64
,
3700 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 3, .opc2
= 0,
3701 .type
= ARM_CP_ALIAS
,
3702 .fieldoffset
= offsetof(CPUARMState
, vfp
.xregs
[ARM_VFP_FPEXC
]),
3703 .access
= PL2_RW
, .accessfn
= fpexc32_access
},
3704 { .name
= "DACR32_EL2", .state
= ARM_CP_STATE_AA64
,
3705 .opc0
= 3, .opc1
= 4, .crn
= 3, .crm
= 0, .opc2
= 0,
3706 .access
= PL2_RW
, .resetvalue
= 0,
3707 .writefn
= dacr_write
, .raw_writefn
= raw_write
,
3708 .fieldoffset
= offsetof(CPUARMState
, cp15
.dacr32_el2
) },
3709 { .name
= "IFSR32_EL2", .state
= ARM_CP_STATE_AA64
,
3710 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 0, .opc2
= 1,
3711 .access
= PL2_RW
, .resetvalue
= 0,
3712 .fieldoffset
= offsetof(CPUARMState
, cp15
.ifsr32_el2
) },
3713 { .name
= "SPSR_IRQ", .state
= ARM_CP_STATE_AA64
,
3714 .type
= ARM_CP_ALIAS
,
3715 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 0,
3717 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_IRQ
]) },
3718 { .name
= "SPSR_ABT", .state
= ARM_CP_STATE_AA64
,
3719 .type
= ARM_CP_ALIAS
,
3720 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 1,
3722 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_ABT
]) },
3723 { .name
= "SPSR_UND", .state
= ARM_CP_STATE_AA64
,
3724 .type
= ARM_CP_ALIAS
,
3725 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 2,
3727 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_UND
]) },
3728 { .name
= "SPSR_FIQ", .state
= ARM_CP_STATE_AA64
,
3729 .type
= ARM_CP_ALIAS
,
3730 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 3, .opc2
= 3,
3732 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_FIQ
]) },
3733 { .name
= "MDCR_EL3", .state
= ARM_CP_STATE_AA64
,
3734 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 3, .opc2
= 1,
3736 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el3
) },
3737 { .name
= "SDCR", .type
= ARM_CP_ALIAS
,
3738 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 1,
3739 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
3740 .writefn
= sdcr_write
,
3741 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.mdcr_el3
) },
3745 /* Used to describe the behaviour of EL2 regs when EL2 does not exist. */
3746 static const ARMCPRegInfo el3_no_el2_cp_reginfo
[] = {
3747 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_AA64
,
3748 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
3750 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
},
3751 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_AA64
,
3752 .type
= ARM_CP_NO_RAW
,
3753 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
3755 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
},
3756 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3757 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
3758 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3759 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3760 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
3761 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3763 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3764 .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
3765 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3766 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3767 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
3768 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3770 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3771 .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
3772 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3774 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
3775 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
3776 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3778 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
3779 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
3780 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3782 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3783 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
3784 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3785 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3786 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3787 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
3788 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3789 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
3790 .cp
= 15, .opc1
= 6, .crm
= 2,
3791 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3792 .type
= ARM_CP_CONST
| ARM_CP_64BIT
, .resetvalue
= 0 },
3793 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
3794 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
3795 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3796 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
3797 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
3798 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3799 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
3800 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
3801 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3802 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
3803 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
3804 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3805 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
3806 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3808 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3809 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
3810 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3811 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
3812 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
3813 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3814 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
3815 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3817 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
3818 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
3819 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3820 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
3821 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_CONST
,
3823 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
3824 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
3825 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3826 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
3827 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
3828 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3829 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3830 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
3831 .access
= PL2_RW
, .accessfn
= access_tda
,
3832 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3833 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_BOTH
,
3834 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
3835 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
3836 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3837 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3838 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
3839 .access
= PL2_RW
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
3843 static void hcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
, uint64_t value
)
3845 ARMCPU
*cpu
= arm_env_get_cpu(env
);
3846 uint64_t valid_mask
= HCR_MASK
;
3848 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
3849 valid_mask
&= ~HCR_HCD
;
3850 } else if (cpu
->psci_conduit
!= QEMU_PSCI_CONDUIT_SMC
) {
3851 /* Architecturally HCR.TSC is RES0 if EL3 is not implemented.
3852 * However, if we're using the SMC PSCI conduit then QEMU is
3853 * effectively acting like EL3 firmware and so the guest at
3854 * EL2 should retain the ability to prevent EL1 from being
3855 * able to make SMC calls into the ersatz firmware, so in
3856 * that case HCR.TSC should be read/write.
3858 valid_mask
&= ~HCR_TSC
;
3861 /* Clear RES0 bits. */
3862 value
&= valid_mask
;
3864 /* These bits change the MMU setup:
3865 * HCR_VM enables stage 2 translation
3866 * HCR_PTW forbids certain page-table setups
3867 * HCR_DC Disables stage1 and enables stage2 translation
3869 if ((raw_read(env
, ri
) ^ value
) & (HCR_VM
| HCR_PTW
| HCR_DC
)) {
3870 tlb_flush(CPU(cpu
));
3872 raw_write(env
, ri
, value
);
3875 static const ARMCPRegInfo el2_cp_reginfo
[] = {
3876 { .name
= "HCR_EL2", .state
= ARM_CP_STATE_AA64
,
3877 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 0,
3878 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.hcr_el2
),
3879 .writefn
= hcr_write
},
3880 { .name
= "ELR_EL2", .state
= ARM_CP_STATE_AA64
,
3881 .type
= ARM_CP_ALIAS
,
3882 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 1,
3884 .fieldoffset
= offsetof(CPUARMState
, elr_el
[2]) },
3885 { .name
= "ESR_EL2", .state
= ARM_CP_STATE_AA64
,
3886 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 2, .opc2
= 0,
3887 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[2]) },
3888 { .name
= "FAR_EL2", .state
= ARM_CP_STATE_AA64
,
3889 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 0,
3890 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[2]) },
3891 { .name
= "SPSR_EL2", .state
= ARM_CP_STATE_AA64
,
3892 .type
= ARM_CP_ALIAS
,
3893 .opc0
= 3, .opc1
= 4, .crn
= 4, .crm
= 0, .opc2
= 0,
3895 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_HYP
]) },
3896 { .name
= "VBAR_EL2", .state
= ARM_CP_STATE_AA64
,
3897 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 0,
3898 .access
= PL2_RW
, .writefn
= vbar_write
,
3899 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[2]),
3901 { .name
= "SP_EL2", .state
= ARM_CP_STATE_AA64
,
3902 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 1, .opc2
= 0,
3903 .access
= PL3_RW
, .type
= ARM_CP_ALIAS
,
3904 .fieldoffset
= offsetof(CPUARMState
, sp_el
[2]) },
3905 { .name
= "CPTR_EL2", .state
= ARM_CP_STATE_BOTH
,
3906 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 2,
3907 .access
= PL2_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
3908 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[2]) },
3909 { .name
= "MAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3910 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 0,
3911 .access
= PL2_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.mair_el
[2]),
3913 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3914 .opc1
= 4, .crn
= 10, .crm
= 2, .opc2
= 1,
3915 .access
= PL2_RW
, .type
= ARM_CP_ALIAS
,
3916 .fieldoffset
= offsetofhigh32(CPUARMState
, cp15
.mair_el
[2]) },
3917 { .name
= "AMAIR_EL2", .state
= ARM_CP_STATE_BOTH
,
3918 .opc0
= 3, .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 0,
3919 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3921 /* HAMAIR1 is mapped to AMAIR_EL2[63:32] */
3922 { .name
= "HMAIR1", .state
= ARM_CP_STATE_AA32
,
3923 .opc1
= 4, .crn
= 10, .crm
= 3, .opc2
= 1,
3924 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3926 { .name
= "AFSR0_EL2", .state
= ARM_CP_STATE_BOTH
,
3927 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 0,
3928 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3930 { .name
= "AFSR1_EL2", .state
= ARM_CP_STATE_BOTH
,
3931 .opc0
= 3, .opc1
= 4, .crn
= 5, .crm
= 1, .opc2
= 1,
3932 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
3934 { .name
= "TCR_EL2", .state
= ARM_CP_STATE_BOTH
,
3935 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 2,
3937 /* no .writefn needed as this can't cause an ASID change;
3938 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
3940 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[2]) },
3941 { .name
= "VTCR", .state
= ARM_CP_STATE_AA32
,
3942 .cp
= 15, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3943 .type
= ARM_CP_ALIAS
,
3944 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3945 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
3946 { .name
= "VTCR_EL2", .state
= ARM_CP_STATE_AA64
,
3947 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 2,
3949 /* no .writefn needed as this can't cause an ASID change;
3950 * no .raw_writefn or .resetfn needed as we never use mask/base_mask
3952 .fieldoffset
= offsetof(CPUARMState
, cp15
.vtcr_el2
) },
3953 { .name
= "VTTBR", .state
= ARM_CP_STATE_AA32
,
3954 .cp
= 15, .opc1
= 6, .crm
= 2,
3955 .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3956 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
3957 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
),
3958 .writefn
= vttbr_write
},
3959 { .name
= "VTTBR_EL2", .state
= ARM_CP_STATE_AA64
,
3960 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 1, .opc2
= 0,
3961 .access
= PL2_RW
, .writefn
= vttbr_write
,
3962 .fieldoffset
= offsetof(CPUARMState
, cp15
.vttbr_el2
) },
3963 { .name
= "SCTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
3964 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 0,
3965 .access
= PL2_RW
, .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
3966 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[2]) },
3967 { .name
= "TPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
3968 .opc0
= 3, .opc1
= 4, .crn
= 13, .crm
= 0, .opc2
= 2,
3969 .access
= PL2_RW
, .resetvalue
= 0,
3970 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[2]) },
3971 { .name
= "TTBR0_EL2", .state
= ARM_CP_STATE_AA64
,
3972 .opc0
= 3, .opc1
= 4, .crn
= 2, .crm
= 0, .opc2
= 0,
3973 .access
= PL2_RW
, .resetvalue
= 0,
3974 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
3975 { .name
= "HTTBR", .cp
= 15, .opc1
= 4, .crm
= 2,
3976 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
,
3977 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[2]) },
3978 { .name
= "TLBIALLNSNH",
3979 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 4,
3980 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3981 .writefn
= tlbiall_nsnh_write
},
3982 { .name
= "TLBIALLNSNHIS",
3983 .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 4,
3984 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3985 .writefn
= tlbiall_nsnh_is_write
},
3986 { .name
= "TLBIALLH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
3987 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3988 .writefn
= tlbiall_hyp_write
},
3989 { .name
= "TLBIALLHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
3990 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3991 .writefn
= tlbiall_hyp_is_write
},
3992 { .name
= "TLBIMVAH", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
3993 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3994 .writefn
= tlbimva_hyp_write
},
3995 { .name
= "TLBIMVAHIS", .cp
= 15, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
3996 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
3997 .writefn
= tlbimva_hyp_is_write
},
3998 { .name
= "TLBI_ALLE2", .state
= ARM_CP_STATE_AA64
,
3999 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 0,
4000 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4001 .writefn
= tlbi_aa64_alle2_write
},
4002 { .name
= "TLBI_VAE2", .state
= ARM_CP_STATE_AA64
,
4003 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 1,
4004 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4005 .writefn
= tlbi_aa64_vae2_write
},
4006 { .name
= "TLBI_VALE2", .state
= ARM_CP_STATE_AA64
,
4007 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 7, .opc2
= 5,
4008 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4009 .writefn
= tlbi_aa64_vae2_write
},
4010 { .name
= "TLBI_ALLE2IS", .state
= ARM_CP_STATE_AA64
,
4011 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 0,
4012 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4013 .writefn
= tlbi_aa64_alle2is_write
},
4014 { .name
= "TLBI_VAE2IS", .state
= ARM_CP_STATE_AA64
,
4015 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 1,
4016 .type
= ARM_CP_NO_RAW
, .access
= PL2_W
,
4017 .writefn
= tlbi_aa64_vae2is_write
},
4018 { .name
= "TLBI_VALE2IS", .state
= ARM_CP_STATE_AA64
,
4019 .opc0
= 1, .opc1
= 4, .crn
= 8, .crm
= 3, .opc2
= 5,
4020 .access
= PL2_W
, .type
= ARM_CP_NO_RAW
,
4021 .writefn
= tlbi_aa64_vae2is_write
},
4022 #ifndef CONFIG_USER_ONLY
4023 /* Unlike the other EL2-related AT operations, these must
4024 * UNDEF from EL3 if EL2 is not implemented, which is why we
4025 * define them here rather than with the rest of the AT ops.
4027 { .name
= "AT_S1E2R", .state
= ARM_CP_STATE_AA64
,
4028 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
4029 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
4030 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4031 { .name
= "AT_S1E2W", .state
= ARM_CP_STATE_AA64
,
4032 .opc0
= 1, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
4033 .access
= PL2_W
, .accessfn
= at_s1e2_access
,
4034 .type
= ARM_CP_NO_RAW
, .writefn
= ats_write64
},
4035 /* The AArch32 ATS1H* operations are CONSTRAINED UNPREDICTABLE
4036 * if EL2 is not implemented; we choose to UNDEF. Behaviour at EL3
4037 * with SCR.NS == 0 outside Monitor mode is UNPREDICTABLE; we choose
4038 * to behave as if SCR.NS was 1.
4040 { .name
= "ATS1HR", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 0,
4042 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
4043 { .name
= "ATS1HW", .cp
= 15, .opc1
= 4, .crn
= 7, .crm
= 8, .opc2
= 1,
4045 .writefn
= ats1h_write
, .type
= ARM_CP_NO_RAW
},
4046 { .name
= "CNTHCTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4047 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 1, .opc2
= 0,
4048 /* ARMv7 requires bit 0 and 1 to reset to 1. ARMv8 defines the
4049 * reset values as IMPDEF. We choose to reset to 3 to comply with
4050 * both ARMv7 and ARMv8.
4052 .access
= PL2_RW
, .resetvalue
= 3,
4053 .fieldoffset
= offsetof(CPUARMState
, cp15
.cnthctl_el2
) },
4054 { .name
= "CNTVOFF_EL2", .state
= ARM_CP_STATE_AA64
,
4055 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 0, .opc2
= 3,
4056 .access
= PL2_RW
, .type
= ARM_CP_IO
, .resetvalue
= 0,
4057 .writefn
= gt_cntvoff_write
,
4058 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
4059 { .name
= "CNTVOFF", .cp
= 15, .opc1
= 4, .crm
= 14,
4060 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_ALIAS
| ARM_CP_IO
,
4061 .writefn
= gt_cntvoff_write
,
4062 .fieldoffset
= offsetof(CPUARMState
, cp15
.cntvoff_el2
) },
4063 { .name
= "CNTHP_CVAL_EL2", .state
= ARM_CP_STATE_AA64
,
4064 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 2,
4065 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
4066 .type
= ARM_CP_IO
, .access
= PL2_RW
,
4067 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
4068 { .name
= "CNTHP_CVAL", .cp
= 15, .opc1
= 6, .crm
= 14,
4069 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].cval
),
4070 .access
= PL2_RW
, .type
= ARM_CP_64BIT
| ARM_CP_IO
,
4071 .writefn
= gt_hyp_cval_write
, .raw_writefn
= raw_write
},
4072 { .name
= "CNTHP_TVAL_EL2", .state
= ARM_CP_STATE_BOTH
,
4073 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 0,
4074 .type
= ARM_CP_NO_RAW
| ARM_CP_IO
, .access
= PL2_RW
,
4075 .resetfn
= gt_hyp_timer_reset
,
4076 .readfn
= gt_hyp_tval_read
, .writefn
= gt_hyp_tval_write
},
4077 { .name
= "CNTHP_CTL_EL2", .state
= ARM_CP_STATE_BOTH
,
4079 .opc0
= 3, .opc1
= 4, .crn
= 14, .crm
= 2, .opc2
= 1,
4081 .fieldoffset
= offsetof(CPUARMState
, cp15
.c14_timer
[GTIMER_HYP
].ctl
),
4083 .writefn
= gt_hyp_ctl_write
, .raw_writefn
= raw_write
},
4085 /* The only field of MDCR_EL2 that has a defined architectural reset value
4086 * is MDCR_EL2.HPMN which should reset to the value of PMCR_EL0.N; but we
4087 * don't impelment any PMU event counters, so using zero as a reset
4088 * value for MDCR_EL2 is okay
4090 { .name
= "MDCR_EL2", .state
= ARM_CP_STATE_BOTH
,
4091 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 1,
4092 .access
= PL2_RW
, .resetvalue
= 0,
4093 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdcr_el2
), },
4094 { .name
= "HPFAR", .state
= ARM_CP_STATE_AA32
,
4095 .cp
= 15, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
4096 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
4097 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
4098 { .name
= "HPFAR_EL2", .state
= ARM_CP_STATE_AA64
,
4099 .opc0
= 3, .opc1
= 4, .crn
= 6, .crm
= 0, .opc2
= 4,
4101 .fieldoffset
= offsetof(CPUARMState
, cp15
.hpfar_el2
) },
4102 { .name
= "HSTR_EL2", .state
= ARM_CP_STATE_BOTH
,
4103 .cp
= 15, .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 1, .opc2
= 3,
4105 .fieldoffset
= offsetof(CPUARMState
, cp15
.hstr_el2
) },
4109 static CPAccessResult
nsacr_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4112 /* The NSACR is RW at EL3, and RO for NS EL1 and NS EL2.
4113 * At Secure EL1 it traps to EL3.
4115 if (arm_current_el(env
) == 3) {
4116 return CP_ACCESS_OK
;
4118 if (arm_is_secure_below_el3(env
)) {
4119 return CP_ACCESS_TRAP_EL3
;
4121 /* Accesses from EL1 NS and EL2 NS are UNDEF for write but allow reads. */
4123 return CP_ACCESS_OK
;
4125 return CP_ACCESS_TRAP_UNCATEGORIZED
;
4128 static const ARMCPRegInfo el3_cp_reginfo
[] = {
4129 { .name
= "SCR_EL3", .state
= ARM_CP_STATE_AA64
,
4130 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 0,
4131 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.scr_el3
),
4132 .resetvalue
= 0, .writefn
= scr_write
},
4133 { .name
= "SCR", .type
= ARM_CP_ALIAS
,
4134 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 0,
4135 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
4136 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.scr_el3
),
4137 .writefn
= scr_write
},
4138 { .name
= "SDER32_EL3", .state
= ARM_CP_STATE_AA64
,
4139 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 1,
4140 .access
= PL3_RW
, .resetvalue
= 0,
4141 .fieldoffset
= offsetof(CPUARMState
, cp15
.sder
) },
4143 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 1,
4144 .access
= PL3_RW
, .resetvalue
= 0,
4145 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.sder
) },
4146 { .name
= "MVBAR", .cp
= 15, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
4147 .access
= PL1_RW
, .accessfn
= access_trap_aa32s_el1
,
4148 .writefn
= vbar_write
, .resetvalue
= 0,
4149 .fieldoffset
= offsetof(CPUARMState
, cp15
.mvbar
) },
4150 { .name
= "TTBR0_EL3", .state
= ARM_CP_STATE_AA64
,
4151 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 0,
4152 .access
= PL3_RW
, .writefn
= vmsa_ttbr_write
, .resetvalue
= 0,
4153 .fieldoffset
= offsetof(CPUARMState
, cp15
.ttbr0_el
[3]) },
4154 { .name
= "TCR_EL3", .state
= ARM_CP_STATE_AA64
,
4155 .opc0
= 3, .opc1
= 6, .crn
= 2, .crm
= 0, .opc2
= 2,
4157 /* no .writefn needed as this can't cause an ASID change;
4158 * we must provide a .raw_writefn and .resetfn because we handle
4159 * reset and migration for the AArch32 TTBCR(S), which might be
4160 * using mask and base_mask.
4162 .resetfn
= vmsa_ttbcr_reset
, .raw_writefn
= vmsa_ttbcr_raw_write
,
4163 .fieldoffset
= offsetof(CPUARMState
, cp15
.tcr_el
[3]) },
4164 { .name
= "ELR_EL3", .state
= ARM_CP_STATE_AA64
,
4165 .type
= ARM_CP_ALIAS
,
4166 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 1,
4168 .fieldoffset
= offsetof(CPUARMState
, elr_el
[3]) },
4169 { .name
= "ESR_EL3", .state
= ARM_CP_STATE_AA64
,
4170 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 2, .opc2
= 0,
4171 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.esr_el
[3]) },
4172 { .name
= "FAR_EL3", .state
= ARM_CP_STATE_AA64
,
4173 .opc0
= 3, .opc1
= 6, .crn
= 6, .crm
= 0, .opc2
= 0,
4174 .access
= PL3_RW
, .fieldoffset
= offsetof(CPUARMState
, cp15
.far_el
[3]) },
4175 { .name
= "SPSR_EL3", .state
= ARM_CP_STATE_AA64
,
4176 .type
= ARM_CP_ALIAS
,
4177 .opc0
= 3, .opc1
= 6, .crn
= 4, .crm
= 0, .opc2
= 0,
4179 .fieldoffset
= offsetof(CPUARMState
, banked_spsr
[BANK_MON
]) },
4180 { .name
= "VBAR_EL3", .state
= ARM_CP_STATE_AA64
,
4181 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 0,
4182 .access
= PL3_RW
, .writefn
= vbar_write
,
4183 .fieldoffset
= offsetof(CPUARMState
, cp15
.vbar_el
[3]),
4185 { .name
= "CPTR_EL3", .state
= ARM_CP_STATE_AA64
,
4186 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 1, .opc2
= 2,
4187 .access
= PL3_RW
, .accessfn
= cptr_access
, .resetvalue
= 0,
4188 .fieldoffset
= offsetof(CPUARMState
, cp15
.cptr_el
[3]) },
4189 { .name
= "TPIDR_EL3", .state
= ARM_CP_STATE_AA64
,
4190 .opc0
= 3, .opc1
= 6, .crn
= 13, .crm
= 0, .opc2
= 2,
4191 .access
= PL3_RW
, .resetvalue
= 0,
4192 .fieldoffset
= offsetof(CPUARMState
, cp15
.tpidr_el
[3]) },
4193 { .name
= "AMAIR_EL3", .state
= ARM_CP_STATE_AA64
,
4194 .opc0
= 3, .opc1
= 6, .crn
= 10, .crm
= 3, .opc2
= 0,
4195 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4197 { .name
= "AFSR0_EL3", .state
= ARM_CP_STATE_BOTH
,
4198 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 0,
4199 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4201 { .name
= "AFSR1_EL3", .state
= ARM_CP_STATE_BOTH
,
4202 .opc0
= 3, .opc1
= 6, .crn
= 5, .crm
= 1, .opc2
= 1,
4203 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
4205 { .name
= "TLBI_ALLE3IS", .state
= ARM_CP_STATE_AA64
,
4206 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 0,
4207 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4208 .writefn
= tlbi_aa64_alle3is_write
},
4209 { .name
= "TLBI_VAE3IS", .state
= ARM_CP_STATE_AA64
,
4210 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 1,
4211 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4212 .writefn
= tlbi_aa64_vae3is_write
},
4213 { .name
= "TLBI_VALE3IS", .state
= ARM_CP_STATE_AA64
,
4214 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 3, .opc2
= 5,
4215 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4216 .writefn
= tlbi_aa64_vae3is_write
},
4217 { .name
= "TLBI_ALLE3", .state
= ARM_CP_STATE_AA64
,
4218 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 0,
4219 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4220 .writefn
= tlbi_aa64_alle3_write
},
4221 { .name
= "TLBI_VAE3", .state
= ARM_CP_STATE_AA64
,
4222 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 1,
4223 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4224 .writefn
= tlbi_aa64_vae3_write
},
4225 { .name
= "TLBI_VALE3", .state
= ARM_CP_STATE_AA64
,
4226 .opc0
= 1, .opc1
= 6, .crn
= 8, .crm
= 7, .opc2
= 5,
4227 .access
= PL3_W
, .type
= ARM_CP_NO_RAW
,
4228 .writefn
= tlbi_aa64_vae3_write
},
4232 static CPAccessResult
ctr_el0_access(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4235 /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
4236 * but the AArch32 CTR has its own reginfo struct)
4238 if (arm_current_el(env
) == 0 && !(env
->cp15
.sctlr_el
[1] & SCTLR_UCT
)) {
4239 return CP_ACCESS_TRAP
;
4241 return CP_ACCESS_OK
;
4244 static void oslar_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4247 /* Writes to OSLAR_EL1 may update the OS lock status, which can be
4248 * read via a bit in OSLSR_EL1.
4252 if (ri
->state
== ARM_CP_STATE_AA32
) {
4253 oslock
= (value
== 0xC5ACCE55);
4258 env
->cp15
.oslsr_el1
= deposit32(env
->cp15
.oslsr_el1
, 1, 1, oslock
);
4261 static const ARMCPRegInfo debug_cp_reginfo
[] = {
4262 /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
4263 * debug components. The AArch64 version of DBGDRAR is named MDRAR_EL1;
4264 * unlike DBGDRAR it is never accessible from EL0.
4265 * DBGDSAR is deprecated and must RAZ from v8 anyway, so it has no AArch64
4268 { .name
= "DBGDRAR", .cp
= 14, .crn
= 1, .crm
= 0, .opc1
= 0, .opc2
= 0,
4269 .access
= PL0_R
, .accessfn
= access_tdra
,
4270 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4271 { .name
= "MDRAR_EL1", .state
= ARM_CP_STATE_AA64
,
4272 .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
4273 .access
= PL1_R
, .accessfn
= access_tdra
,
4274 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4275 { .name
= "DBGDSAR", .cp
= 14, .crn
= 2, .crm
= 0, .opc1
= 0, .opc2
= 0,
4276 .access
= PL0_R
, .accessfn
= access_tdra
,
4277 .type
= ARM_CP_CONST
, .resetvalue
= 0 },
4278 /* Monitor debug system control register; the 32-bit alias is DBGDSCRext. */
4279 { .name
= "MDSCR_EL1", .state
= ARM_CP_STATE_BOTH
,
4280 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
4281 .access
= PL1_RW
, .accessfn
= access_tda
,
4282 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
),
4284 /* MDCCSR_EL0, aka DBGDSCRint. This is a read-only mirror of MDSCR_EL1.
4285 * We don't implement the configurable EL0 access.
4287 { .name
= "MDCCSR_EL0", .state
= ARM_CP_STATE_BOTH
,
4288 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
4289 .type
= ARM_CP_ALIAS
,
4290 .access
= PL1_R
, .accessfn
= access_tda
,
4291 .fieldoffset
= offsetof(CPUARMState
, cp15
.mdscr_el1
), },
4292 { .name
= "OSLAR_EL1", .state
= ARM_CP_STATE_BOTH
,
4293 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 4,
4294 .access
= PL1_W
, .type
= ARM_CP_NO_RAW
,
4295 .accessfn
= access_tdosa
,
4296 .writefn
= oslar_write
},
4297 { .name
= "OSLSR_EL1", .state
= ARM_CP_STATE_BOTH
,
4298 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 4,
4299 .access
= PL1_R
, .resetvalue
= 10,
4300 .accessfn
= access_tdosa
,
4301 .fieldoffset
= offsetof(CPUARMState
, cp15
.oslsr_el1
) },
4302 /* Dummy OSDLR_EL1: 32-bit Linux will read this */
4303 { .name
= "OSDLR_EL1", .state
= ARM_CP_STATE_BOTH
,
4304 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 1, .crm
= 3, .opc2
= 4,
4305 .access
= PL1_RW
, .accessfn
= access_tdosa
,
4306 .type
= ARM_CP_NOP
},
4307 /* Dummy DBGVCR: Linux wants to clear this on startup, but we don't
4308 * implement vector catch debug events yet.
4311 .cp
= 14, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
4312 .access
= PL1_RW
, .accessfn
= access_tda
,
4313 .type
= ARM_CP_NOP
},
4314 /* Dummy DBGVCR32_EL2 (which is only for a 64-bit hypervisor
4315 * to save and restore a 32-bit guest's DBGVCR)
4317 { .name
= "DBGVCR32_EL2", .state
= ARM_CP_STATE_AA64
,
4318 .opc0
= 2, .opc1
= 4, .crn
= 0, .crm
= 7, .opc2
= 0,
4319 .access
= PL2_RW
, .accessfn
= access_tda
,
4320 .type
= ARM_CP_NOP
},
4321 /* Dummy MDCCINT_EL1, since we don't implement the Debug Communications
4322 * Channel but Linux may try to access this register. The 32-bit
4323 * alias is DBGDCCINT.
4325 { .name
= "MDCCINT_EL1", .state
= ARM_CP_STATE_BOTH
,
4326 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
4327 .access
= PL1_RW
, .accessfn
= access_tda
,
4328 .type
= ARM_CP_NOP
},
4332 static const ARMCPRegInfo debug_lpae_cp_reginfo
[] = {
4333 /* 64 bit access versions of the (dummy) debug registers */
4334 { .name
= "DBGDRAR", .cp
= 14, .crm
= 1, .opc1
= 0,
4335 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
4336 { .name
= "DBGDSAR", .cp
= 14, .crm
= 2, .opc1
= 0,
4337 .access
= PL0_R
, .type
= ARM_CP_CONST
|ARM_CP_64BIT
, .resetvalue
= 0 },
4341 /* Return the exception level to which SVE-disabled exceptions should
4342 * be taken, or 0 if SVE is enabled.
4344 static int sve_exception_el(CPUARMState
*env
)
4346 #ifndef CONFIG_USER_ONLY
4347 unsigned current_el
= arm_current_el(env
);
4349 /* The CPACR.ZEN controls traps to EL1:
4350 * 0, 2 : trap EL0 and EL1 accesses
4351 * 1 : trap only EL0 accesses
4352 * 3 : trap no accesses
4354 switch (extract32(env
->cp15
.cpacr_el1
, 16, 2)) {
4356 if (current_el
<= 1) {
4357 /* Trap to PL1, which might be EL1 or EL3 */
4358 if (arm_is_secure(env
) && !arm_el_is_aa64(env
, 3)) {
4365 if (current_el
== 0) {
4373 /* Similarly for CPACR.FPEN, after having checked ZEN. */
4374 switch (extract32(env
->cp15
.cpacr_el1
, 20, 2)) {
4376 if (current_el
<= 1) {
4377 if (arm_is_secure(env
) && !arm_el_is_aa64(env
, 3)) {
4384 if (current_el
== 0) {
4392 /* CPTR_EL2. Check both TZ and TFP. */
4394 && (env
->cp15
.cptr_el
[2] & (CPTR_TFP
| CPTR_TZ
))
4395 && !arm_is_secure_below_el3(env
)) {
4399 /* CPTR_EL3. Check both EZ and TFP. */
4400 if (!(env
->cp15
.cptr_el
[3] & CPTR_EZ
)
4401 || (env
->cp15
.cptr_el
[3] & CPTR_TFP
)) {
4408 static void zcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4411 /* Bits other than [3:0] are RAZ/WI. */
4412 raw_write(env
, ri
, value
& 0xf);
4415 static const ARMCPRegInfo zcr_el1_reginfo
= {
4416 .name
= "ZCR_EL1", .state
= ARM_CP_STATE_AA64
,
4417 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 2, .opc2
= 0,
4418 .access
= PL1_RW
, .type
= ARM_CP_SVE
,
4419 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[1]),
4420 .writefn
= zcr_write
, .raw_writefn
= raw_write
4423 static const ARMCPRegInfo zcr_el2_reginfo
= {
4424 .name
= "ZCR_EL2", .state
= ARM_CP_STATE_AA64
,
4425 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 2, .opc2
= 0,
4426 .access
= PL2_RW
, .type
= ARM_CP_SVE
,
4427 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[2]),
4428 .writefn
= zcr_write
, .raw_writefn
= raw_write
4431 static const ARMCPRegInfo zcr_no_el2_reginfo
= {
4432 .name
= "ZCR_EL2", .state
= ARM_CP_STATE_AA64
,
4433 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 2, .opc2
= 0,
4434 .access
= PL2_RW
, .type
= ARM_CP_SVE
,
4435 .readfn
= arm_cp_read_zero
, .writefn
= arm_cp_write_ignore
4438 static const ARMCPRegInfo zcr_el3_reginfo
= {
4439 .name
= "ZCR_EL3", .state
= ARM_CP_STATE_AA64
,
4440 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 2, .opc2
= 0,
4441 .access
= PL3_RW
, .type
= ARM_CP_SVE
,
4442 .fieldoffset
= offsetof(CPUARMState
, vfp
.zcr_el
[3]),
4443 .writefn
= zcr_write
, .raw_writefn
= raw_write
4446 void hw_watchpoint_update(ARMCPU
*cpu
, int n
)
4448 CPUARMState
*env
= &cpu
->env
;
4450 vaddr wvr
= env
->cp15
.dbgwvr
[n
];
4451 uint64_t wcr
= env
->cp15
.dbgwcr
[n
];
4453 int flags
= BP_CPU
| BP_STOP_BEFORE_ACCESS
;
4455 if (env
->cpu_watchpoint
[n
]) {
4456 cpu_watchpoint_remove_by_ref(CPU(cpu
), env
->cpu_watchpoint
[n
]);
4457 env
->cpu_watchpoint
[n
] = NULL
;
4460 if (!extract64(wcr
, 0, 1)) {
4461 /* E bit clear : watchpoint disabled */
4465 switch (extract64(wcr
, 3, 2)) {
4467 /* LSC 00 is reserved and must behave as if the wp is disabled */
4470 flags
|= BP_MEM_READ
;
4473 flags
|= BP_MEM_WRITE
;
4476 flags
|= BP_MEM_ACCESS
;
4480 /* Attempts to use both MASK and BAS fields simultaneously are
4481 * CONSTRAINED UNPREDICTABLE; we opt to ignore BAS in this case,
4482 * thus generating a watchpoint for every byte in the masked region.
4484 mask
= extract64(wcr
, 24, 4);
4485 if (mask
== 1 || mask
== 2) {
4486 /* Reserved values of MASK; we must act as if the mask value was
4487 * some non-reserved value, or as if the watchpoint were disabled.
4488 * We choose the latter.
4492 /* Watchpoint covers an aligned area up to 2GB in size */
4494 /* If masked bits in WVR are not zero it's CONSTRAINED UNPREDICTABLE
4495 * whether the watchpoint fires when the unmasked bits match; we opt
4496 * to generate the exceptions.
4500 /* Watchpoint covers bytes defined by the byte address select bits */
4501 int bas
= extract64(wcr
, 5, 8);
4505 /* This must act as if the watchpoint is disabled */
4509 if (extract64(wvr
, 2, 1)) {
4510 /* Deprecated case of an only 4-aligned address. BAS[7:4] are
4511 * ignored, and BAS[3:0] define which bytes to watch.
4515 /* The BAS bits are supposed to be programmed to indicate a contiguous
4516 * range of bytes. Otherwise it is CONSTRAINED UNPREDICTABLE whether
4517 * we fire for each byte in the word/doubleword addressed by the WVR.
4518 * We choose to ignore any non-zero bits after the first range of 1s.
4520 basstart
= ctz32(bas
);
4521 len
= cto32(bas
>> basstart
);
4525 cpu_watchpoint_insert(CPU(cpu
), wvr
, len
, flags
,
4526 &env
->cpu_watchpoint
[n
]);
4529 void hw_watchpoint_update_all(ARMCPU
*cpu
)
4532 CPUARMState
*env
= &cpu
->env
;
4534 /* Completely clear out existing QEMU watchpoints and our array, to
4535 * avoid possible stale entries following migration load.
4537 cpu_watchpoint_remove_all(CPU(cpu
), BP_CPU
);
4538 memset(env
->cpu_watchpoint
, 0, sizeof(env
->cpu_watchpoint
));
4540 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_watchpoint
); i
++) {
4541 hw_watchpoint_update(cpu
, i
);
4545 static void dbgwvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4548 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4551 /* Bits [63:49] are hardwired to the value of bit [48]; that is, the
4552 * register reads and behaves as if values written are sign extended.
4553 * Bits [1:0] are RES0.
4555 value
= sextract64(value
, 0, 49) & ~3ULL;
4557 raw_write(env
, ri
, value
);
4558 hw_watchpoint_update(cpu
, i
);
4561 static void dbgwcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4564 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4567 raw_write(env
, ri
, value
);
4568 hw_watchpoint_update(cpu
, i
);
4571 void hw_breakpoint_update(ARMCPU
*cpu
, int n
)
4573 CPUARMState
*env
= &cpu
->env
;
4574 uint64_t bvr
= env
->cp15
.dbgbvr
[n
];
4575 uint64_t bcr
= env
->cp15
.dbgbcr
[n
];
4580 if (env
->cpu_breakpoint
[n
]) {
4581 cpu_breakpoint_remove_by_ref(CPU(cpu
), env
->cpu_breakpoint
[n
]);
4582 env
->cpu_breakpoint
[n
] = NULL
;
4585 if (!extract64(bcr
, 0, 1)) {
4586 /* E bit clear : watchpoint disabled */
4590 bt
= extract64(bcr
, 20, 4);
4593 case 4: /* unlinked address mismatch (reserved if AArch64) */
4594 case 5: /* linked address mismatch (reserved if AArch64) */
4595 qemu_log_mask(LOG_UNIMP
,
4596 "arm: address mismatch breakpoint types not implemented\n");
4598 case 0: /* unlinked address match */
4599 case 1: /* linked address match */
4601 /* Bits [63:49] are hardwired to the value of bit [48]; that is,
4602 * we behave as if the register was sign extended. Bits [1:0] are
4603 * RES0. The BAS field is used to allow setting breakpoints on 16
4604 * bit wide instructions; it is CONSTRAINED UNPREDICTABLE whether
4605 * a bp will fire if the addresses covered by the bp and the addresses
4606 * covered by the insn overlap but the insn doesn't start at the
4607 * start of the bp address range. We choose to require the insn and
4608 * the bp to have the same address. The constraints on writing to
4609 * BAS enforced in dbgbcr_write mean we have only four cases:
4610 * 0b0000 => no breakpoint
4611 * 0b0011 => breakpoint on addr
4612 * 0b1100 => breakpoint on addr + 2
4613 * 0b1111 => breakpoint on addr
4614 * See also figure D2-3 in the v8 ARM ARM (DDI0487A.c).
4616 int bas
= extract64(bcr
, 5, 4);
4617 addr
= sextract64(bvr
, 0, 49) & ~3ULL;
4626 case 2: /* unlinked context ID match */
4627 case 8: /* unlinked VMID match (reserved if no EL2) */
4628 case 10: /* unlinked context ID and VMID match (reserved if no EL2) */
4629 qemu_log_mask(LOG_UNIMP
,
4630 "arm: unlinked context breakpoint types not implemented\n");
4632 case 9: /* linked VMID match (reserved if no EL2) */
4633 case 11: /* linked context ID and VMID match (reserved if no EL2) */
4634 case 3: /* linked context ID match */
4636 /* We must generate no events for Linked context matches (unless
4637 * they are linked to by some other bp/wp, which is handled in
4638 * updates for the linking bp/wp). We choose to also generate no events
4639 * for reserved values.
4644 cpu_breakpoint_insert(CPU(cpu
), addr
, flags
, &env
->cpu_breakpoint
[n
]);
4647 void hw_breakpoint_update_all(ARMCPU
*cpu
)
4650 CPUARMState
*env
= &cpu
->env
;
4652 /* Completely clear out existing QEMU breakpoints and our array, to
4653 * avoid possible stale entries following migration load.
4655 cpu_breakpoint_remove_all(CPU(cpu
), BP_CPU
);
4656 memset(env
->cpu_breakpoint
, 0, sizeof(env
->cpu_breakpoint
));
4658 for (i
= 0; i
< ARRAY_SIZE(cpu
->env
.cpu_breakpoint
); i
++) {
4659 hw_breakpoint_update(cpu
, i
);
4663 static void dbgbvr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4666 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4669 raw_write(env
, ri
, value
);
4670 hw_breakpoint_update(cpu
, i
);
4673 static void dbgbcr_write(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
4676 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4679 /* BAS[3] is a read-only copy of BAS[2], and BAS[1] a read-only
4682 value
= deposit64(value
, 6, 1, extract64(value
, 5, 1));
4683 value
= deposit64(value
, 8, 1, extract64(value
, 7, 1));
4685 raw_write(env
, ri
, value
);
4686 hw_breakpoint_update(cpu
, i
);
4689 static void define_debug_regs(ARMCPU
*cpu
)
4691 /* Define v7 and v8 architectural debug registers.
4692 * These are just dummy implementations for now.
4695 int wrps
, brps
, ctx_cmps
;
4696 ARMCPRegInfo dbgdidr
= {
4697 .name
= "DBGDIDR", .cp
= 14, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 0,
4698 .access
= PL0_R
, .accessfn
= access_tda
,
4699 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->dbgdidr
,
4702 /* Note that all these register fields hold "number of Xs minus 1". */
4703 brps
= extract32(cpu
->dbgdidr
, 24, 4);
4704 wrps
= extract32(cpu
->dbgdidr
, 28, 4);
4705 ctx_cmps
= extract32(cpu
->dbgdidr
, 20, 4);
4707 assert(ctx_cmps
<= brps
);
4709 /* The DBGDIDR and ID_AA64DFR0_EL1 define various properties
4710 * of the debug registers such as number of breakpoints;
4711 * check that if they both exist then they agree.
4713 if (arm_feature(&cpu
->env
, ARM_FEATURE_AARCH64
)) {
4714 assert(extract32(cpu
->id_aa64dfr0
, 12, 4) == brps
);
4715 assert(extract32(cpu
->id_aa64dfr0
, 20, 4) == wrps
);
4716 assert(extract32(cpu
->id_aa64dfr0
, 28, 4) == ctx_cmps
);
4719 define_one_arm_cp_reg(cpu
, &dbgdidr
);
4720 define_arm_cp_regs(cpu
, debug_cp_reginfo
);
4722 if (arm_feature(&cpu
->env
, ARM_FEATURE_LPAE
)) {
4723 define_arm_cp_regs(cpu
, debug_lpae_cp_reginfo
);
4726 for (i
= 0; i
< brps
+ 1; i
++) {
4727 ARMCPRegInfo dbgregs
[] = {
4728 { .name
= "DBGBVR", .state
= ARM_CP_STATE_BOTH
,
4729 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 4,
4730 .access
= PL1_RW
, .accessfn
= access_tda
,
4731 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbvr
[i
]),
4732 .writefn
= dbgbvr_write
, .raw_writefn
= raw_write
4734 { .name
= "DBGBCR", .state
= ARM_CP_STATE_BOTH
,
4735 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 5,
4736 .access
= PL1_RW
, .accessfn
= access_tda
,
4737 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgbcr
[i
]),
4738 .writefn
= dbgbcr_write
, .raw_writefn
= raw_write
4742 define_arm_cp_regs(cpu
, dbgregs
);
4745 for (i
= 0; i
< wrps
+ 1; i
++) {
4746 ARMCPRegInfo dbgregs
[] = {
4747 { .name
= "DBGWVR", .state
= ARM_CP_STATE_BOTH
,
4748 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 6,
4749 .access
= PL1_RW
, .accessfn
= access_tda
,
4750 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwvr
[i
]),
4751 .writefn
= dbgwvr_write
, .raw_writefn
= raw_write
4753 { .name
= "DBGWCR", .state
= ARM_CP_STATE_BOTH
,
4754 .cp
= 14, .opc0
= 2, .opc1
= 0, .crn
= 0, .crm
= i
, .opc2
= 7,
4755 .access
= PL1_RW
, .accessfn
= access_tda
,
4756 .fieldoffset
= offsetof(CPUARMState
, cp15
.dbgwcr
[i
]),
4757 .writefn
= dbgwcr_write
, .raw_writefn
= raw_write
4761 define_arm_cp_regs(cpu
, dbgregs
);
4765 /* We don't know until after realize whether there's a GICv3
4766 * attached, and that is what registers the gicv3 sysregs.
4767 * So we have to fill in the GIC fields in ID_PFR/ID_PFR1_EL1/ID_AA64PFR0_EL1
4770 static uint64_t id_pfr1_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4772 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4773 uint64_t pfr1
= cpu
->id_pfr1
;
4775 if (env
->gicv3state
) {
4781 static uint64_t id_aa64pfr0_read(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
4783 ARMCPU
*cpu
= arm_env_get_cpu(env
);
4784 uint64_t pfr0
= cpu
->id_aa64pfr0
;
4786 if (env
->gicv3state
) {
4792 void register_cp_regs_for_features(ARMCPU
*cpu
)
4794 /* Register all the coprocessor registers based on feature bits */
4795 CPUARMState
*env
= &cpu
->env
;
4796 if (arm_feature(env
, ARM_FEATURE_M
)) {
4797 /* M profile has no coprocessor registers */
4801 define_arm_cp_regs(cpu
, cp_reginfo
);
4802 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
4803 /* Must go early as it is full of wildcards that may be
4804 * overridden by later definitions.
4806 define_arm_cp_regs(cpu
, not_v8_cp_reginfo
);
4809 if (arm_feature(env
, ARM_FEATURE_V6
)) {
4810 /* The ID registers all have impdef reset values */
4811 ARMCPRegInfo v6_idregs
[] = {
4812 { .name
= "ID_PFR0", .state
= ARM_CP_STATE_BOTH
,
4813 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 0,
4814 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4815 .resetvalue
= cpu
->id_pfr0
},
4816 /* ID_PFR1 is not a plain ARM_CP_CONST because we don't know
4817 * the value of the GIC field until after we define these regs.
4819 { .name
= "ID_PFR1", .state
= ARM_CP_STATE_BOTH
,
4820 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 1,
4821 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
4822 .readfn
= id_pfr1_read
,
4823 .writefn
= arm_cp_write_ignore
},
4824 { .name
= "ID_DFR0", .state
= ARM_CP_STATE_BOTH
,
4825 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 2,
4826 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4827 .resetvalue
= cpu
->id_dfr0
},
4828 { .name
= "ID_AFR0", .state
= ARM_CP_STATE_BOTH
,
4829 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 3,
4830 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4831 .resetvalue
= cpu
->id_afr0
},
4832 { .name
= "ID_MMFR0", .state
= ARM_CP_STATE_BOTH
,
4833 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 4,
4834 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4835 .resetvalue
= cpu
->id_mmfr0
},
4836 { .name
= "ID_MMFR1", .state
= ARM_CP_STATE_BOTH
,
4837 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 5,
4838 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4839 .resetvalue
= cpu
->id_mmfr1
},
4840 { .name
= "ID_MMFR2", .state
= ARM_CP_STATE_BOTH
,
4841 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 6,
4842 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4843 .resetvalue
= cpu
->id_mmfr2
},
4844 { .name
= "ID_MMFR3", .state
= ARM_CP_STATE_BOTH
,
4845 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 1, .opc2
= 7,
4846 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4847 .resetvalue
= cpu
->id_mmfr3
},
4848 { .name
= "ID_ISAR0", .state
= ARM_CP_STATE_BOTH
,
4849 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 0,
4850 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4851 .resetvalue
= cpu
->id_isar0
},
4852 { .name
= "ID_ISAR1", .state
= ARM_CP_STATE_BOTH
,
4853 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 1,
4854 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4855 .resetvalue
= cpu
->id_isar1
},
4856 { .name
= "ID_ISAR2", .state
= ARM_CP_STATE_BOTH
,
4857 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 2,
4858 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4859 .resetvalue
= cpu
->id_isar2
},
4860 { .name
= "ID_ISAR3", .state
= ARM_CP_STATE_BOTH
,
4861 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 3,
4862 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4863 .resetvalue
= cpu
->id_isar3
},
4864 { .name
= "ID_ISAR4", .state
= ARM_CP_STATE_BOTH
,
4865 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 4,
4866 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4867 .resetvalue
= cpu
->id_isar4
},
4868 { .name
= "ID_ISAR5", .state
= ARM_CP_STATE_BOTH
,
4869 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 5,
4870 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4871 .resetvalue
= cpu
->id_isar5
},
4872 { .name
= "ID_MMFR4", .state
= ARM_CP_STATE_BOTH
,
4873 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 6,
4874 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4875 .resetvalue
= cpu
->id_mmfr4
},
4876 { .name
= "ID_ISAR6", .state
= ARM_CP_STATE_BOTH
,
4877 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 2, .opc2
= 7,
4878 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4879 .resetvalue
= cpu
->id_isar6
},
4882 define_arm_cp_regs(cpu
, v6_idregs
);
4883 define_arm_cp_regs(cpu
, v6_cp_reginfo
);
4885 define_arm_cp_regs(cpu
, not_v6_cp_reginfo
);
4887 if (arm_feature(env
, ARM_FEATURE_V6K
)) {
4888 define_arm_cp_regs(cpu
, v6k_cp_reginfo
);
4890 if (arm_feature(env
, ARM_FEATURE_V7MP
) &&
4891 !arm_feature(env
, ARM_FEATURE_PMSA
)) {
4892 define_arm_cp_regs(cpu
, v7mp_cp_reginfo
);
4894 if (arm_feature(env
, ARM_FEATURE_V7
)) {
4895 /* v7 performance monitor control register: same implementor
4896 * field as main ID register, and we implement only the cycle
4899 #ifndef CONFIG_USER_ONLY
4900 ARMCPRegInfo pmcr
= {
4901 .name
= "PMCR", .cp
= 15, .crn
= 9, .crm
= 12, .opc1
= 0, .opc2
= 0,
4903 .type
= ARM_CP_IO
| ARM_CP_ALIAS
,
4904 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.c9_pmcr
),
4905 .accessfn
= pmreg_access
, .writefn
= pmcr_write
,
4906 .raw_writefn
= raw_write
,
4908 ARMCPRegInfo pmcr64
= {
4909 .name
= "PMCR_EL0", .state
= ARM_CP_STATE_AA64
,
4910 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 0,
4911 .access
= PL0_RW
, .accessfn
= pmreg_access
,
4913 .fieldoffset
= offsetof(CPUARMState
, cp15
.c9_pmcr
),
4914 .resetvalue
= cpu
->midr
& 0xff000000,
4915 .writefn
= pmcr_write
, .raw_writefn
= raw_write
,
4917 define_one_arm_cp_reg(cpu
, &pmcr
);
4918 define_one_arm_cp_reg(cpu
, &pmcr64
);
4920 ARMCPRegInfo clidr
= {
4921 .name
= "CLIDR", .state
= ARM_CP_STATE_BOTH
,
4922 .opc0
= 3, .crn
= 0, .crm
= 0, .opc1
= 1, .opc2
= 1,
4923 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->clidr
4925 define_one_arm_cp_reg(cpu
, &clidr
);
4926 define_arm_cp_regs(cpu
, v7_cp_reginfo
);
4927 define_debug_regs(cpu
);
4929 define_arm_cp_regs(cpu
, not_v7_cp_reginfo
);
4931 if (arm_feature(env
, ARM_FEATURE_V8
)) {
4932 /* AArch64 ID registers, which all have impdef reset values.
4933 * Note that within the ID register ranges the unused slots
4934 * must all RAZ, not UNDEF; future architecture versions may
4935 * define new registers here.
4937 ARMCPRegInfo v8_idregs
[] = {
4938 /* ID_AA64PFR0_EL1 is not a plain ARM_CP_CONST because we don't
4939 * know the right value for the GIC field until after we
4940 * define these regs.
4942 { .name
= "ID_AA64PFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4943 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 0,
4944 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
,
4945 .readfn
= id_aa64pfr0_read
,
4946 .writefn
= arm_cp_write_ignore
},
4947 { .name
= "ID_AA64PFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4948 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 1,
4949 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4950 .resetvalue
= cpu
->id_aa64pfr1
},
4951 { .name
= "ID_AA64PFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4952 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 2,
4953 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4955 { .name
= "ID_AA64PFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4956 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 3,
4957 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4959 { .name
= "ID_AA64PFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4960 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 4,
4961 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4963 { .name
= "ID_AA64PFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4964 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 5,
4965 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4967 { .name
= "ID_AA64PFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4968 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 6,
4969 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4971 { .name
= "ID_AA64PFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4972 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 4, .opc2
= 7,
4973 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4975 { .name
= "ID_AA64DFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4976 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 0,
4977 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4978 .resetvalue
= cpu
->id_aa64dfr0
},
4979 { .name
= "ID_AA64DFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4980 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 1,
4981 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4982 .resetvalue
= cpu
->id_aa64dfr1
},
4983 { .name
= "ID_AA64DFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4984 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 2,
4985 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4987 { .name
= "ID_AA64DFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
4988 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 3,
4989 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4991 { .name
= "ID_AA64AFR0_EL1", .state
= ARM_CP_STATE_AA64
,
4992 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 4,
4993 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4994 .resetvalue
= cpu
->id_aa64afr0
},
4995 { .name
= "ID_AA64AFR1_EL1", .state
= ARM_CP_STATE_AA64
,
4996 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 5,
4997 .access
= PL1_R
, .type
= ARM_CP_CONST
,
4998 .resetvalue
= cpu
->id_aa64afr1
},
4999 { .name
= "ID_AA64AFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5000 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 6,
5001 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5003 { .name
= "ID_AA64AFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5004 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 5, .opc2
= 7,
5005 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5007 { .name
= "ID_AA64ISAR0_EL1", .state
= ARM_CP_STATE_AA64
,
5008 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 0,
5009 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5010 .resetvalue
= cpu
->id_aa64isar0
},
5011 { .name
= "ID_AA64ISAR1_EL1", .state
= ARM_CP_STATE_AA64
,
5012 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 1,
5013 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5014 .resetvalue
= cpu
->id_aa64isar1
},
5015 { .name
= "ID_AA64ISAR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5016 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 2,
5017 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5019 { .name
= "ID_AA64ISAR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5020 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 3,
5021 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5023 { .name
= "ID_AA64ISAR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5024 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 4,
5025 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5027 { .name
= "ID_AA64ISAR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5028 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 5,
5029 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5031 { .name
= "ID_AA64ISAR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5032 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 6,
5033 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5035 { .name
= "ID_AA64ISAR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5036 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 6, .opc2
= 7,
5037 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5039 { .name
= "ID_AA64MMFR0_EL1", .state
= ARM_CP_STATE_AA64
,
5040 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 0,
5041 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5042 .resetvalue
= cpu
->id_aa64mmfr0
},
5043 { .name
= "ID_AA64MMFR1_EL1", .state
= ARM_CP_STATE_AA64
,
5044 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 1,
5045 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5046 .resetvalue
= cpu
->id_aa64mmfr1
},
5047 { .name
= "ID_AA64MMFR2_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5048 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 2,
5049 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5051 { .name
= "ID_AA64MMFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5052 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 3,
5053 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5055 { .name
= "ID_AA64MMFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5056 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 4,
5057 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5059 { .name
= "ID_AA64MMFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5060 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 5,
5061 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5063 { .name
= "ID_AA64MMFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5064 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 6,
5065 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5067 { .name
= "ID_AA64MMFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5068 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 7, .opc2
= 7,
5069 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5071 { .name
= "MVFR0_EL1", .state
= ARM_CP_STATE_AA64
,
5072 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 0,
5073 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5074 .resetvalue
= cpu
->mvfr0
},
5075 { .name
= "MVFR1_EL1", .state
= ARM_CP_STATE_AA64
,
5076 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 1,
5077 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5078 .resetvalue
= cpu
->mvfr1
},
5079 { .name
= "MVFR2_EL1", .state
= ARM_CP_STATE_AA64
,
5080 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 2,
5081 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5082 .resetvalue
= cpu
->mvfr2
},
5083 { .name
= "MVFR3_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5084 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 3,
5085 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5087 { .name
= "MVFR4_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5088 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 4,
5089 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5091 { .name
= "MVFR5_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5092 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 5,
5093 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5095 { .name
= "MVFR6_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5096 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 6,
5097 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5099 { .name
= "MVFR7_EL1_RESERVED", .state
= ARM_CP_STATE_AA64
,
5100 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 3, .opc2
= 7,
5101 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5103 { .name
= "PMCEID0", .state
= ARM_CP_STATE_AA32
,
5104 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 6,
5105 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
5106 .resetvalue
= cpu
->pmceid0
},
5107 { .name
= "PMCEID0_EL0", .state
= ARM_CP_STATE_AA64
,
5108 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 6,
5109 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
5110 .resetvalue
= cpu
->pmceid0
},
5111 { .name
= "PMCEID1", .state
= ARM_CP_STATE_AA32
,
5112 .cp
= 15, .opc1
= 0, .crn
= 9, .crm
= 12, .opc2
= 7,
5113 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
5114 .resetvalue
= cpu
->pmceid1
},
5115 { .name
= "PMCEID1_EL0", .state
= ARM_CP_STATE_AA64
,
5116 .opc0
= 3, .opc1
= 3, .crn
= 9, .crm
= 12, .opc2
= 7,
5117 .access
= PL0_R
, .accessfn
= pmreg_access
, .type
= ARM_CP_CONST
,
5118 .resetvalue
= cpu
->pmceid1
},
5121 /* RVBAR_EL1 is only implemented if EL1 is the highest EL */
5122 if (!arm_feature(env
, ARM_FEATURE_EL3
) &&
5123 !arm_feature(env
, ARM_FEATURE_EL2
)) {
5124 ARMCPRegInfo rvbar
= {
5125 .name
= "RVBAR_EL1", .state
= ARM_CP_STATE_AA64
,
5126 .opc0
= 3, .opc1
= 0, .crn
= 12, .crm
= 0, .opc2
= 1,
5127 .type
= ARM_CP_CONST
, .access
= PL1_R
, .resetvalue
= cpu
->rvbar
5129 define_one_arm_cp_reg(cpu
, &rvbar
);
5131 define_arm_cp_regs(cpu
, v8_idregs
);
5132 define_arm_cp_regs(cpu
, v8_cp_reginfo
);
5134 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
5135 uint64_t vmpidr_def
= mpidr_read_val(env
);
5136 ARMCPRegInfo vpidr_regs
[] = {
5137 { .name
= "VPIDR", .state
= ARM_CP_STATE_AA32
,
5138 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
5139 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
5140 .resetvalue
= cpu
->midr
, .type
= ARM_CP_ALIAS
,
5141 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.vpidr_el2
) },
5142 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
5143 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
5144 .access
= PL2_RW
, .resetvalue
= cpu
->midr
,
5145 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
5146 { .name
= "VMPIDR", .state
= ARM_CP_STATE_AA32
,
5147 .cp
= 15, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
5148 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns
,
5149 .resetvalue
= vmpidr_def
, .type
= ARM_CP_ALIAS
,
5150 .fieldoffset
= offsetoflow32(CPUARMState
, cp15
.vmpidr_el2
) },
5151 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_AA64
,
5152 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
5154 .resetvalue
= vmpidr_def
,
5155 .fieldoffset
= offsetof(CPUARMState
, cp15
.vmpidr_el2
) },
5158 define_arm_cp_regs(cpu
, vpidr_regs
);
5159 define_arm_cp_regs(cpu
, el2_cp_reginfo
);
5160 /* RVBAR_EL2 is only implemented if EL2 is the highest EL */
5161 if (!arm_feature(env
, ARM_FEATURE_EL3
)) {
5162 ARMCPRegInfo rvbar
= {
5163 .name
= "RVBAR_EL2", .state
= ARM_CP_STATE_AA64
,
5164 .opc0
= 3, .opc1
= 4, .crn
= 12, .crm
= 0, .opc2
= 1,
5165 .type
= ARM_CP_CONST
, .access
= PL2_R
, .resetvalue
= cpu
->rvbar
5167 define_one_arm_cp_reg(cpu
, &rvbar
);
5170 /* If EL2 is missing but higher ELs are enabled, we need to
5171 * register the no_el2 reginfos.
5173 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
5174 /* When EL3 exists but not EL2, VPIDR and VMPIDR take the value
5175 * of MIDR_EL1 and MPIDR_EL1.
5177 ARMCPRegInfo vpidr_regs
[] = {
5178 { .name
= "VPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
5179 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 0,
5180 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
5181 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->midr
,
5182 .fieldoffset
= offsetof(CPUARMState
, cp15
.vpidr_el2
) },
5183 { .name
= "VMPIDR_EL2", .state
= ARM_CP_STATE_BOTH
,
5184 .opc0
= 3, .opc1
= 4, .crn
= 0, .crm
= 0, .opc2
= 5,
5185 .access
= PL2_RW
, .accessfn
= access_el3_aa32ns_aa64any
,
5186 .type
= ARM_CP_NO_RAW
,
5187 .writefn
= arm_cp_write_ignore
, .readfn
= mpidr_read
},
5190 define_arm_cp_regs(cpu
, vpidr_regs
);
5191 define_arm_cp_regs(cpu
, el3_no_el2_cp_reginfo
);
5194 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
5195 define_arm_cp_regs(cpu
, el3_cp_reginfo
);
5196 ARMCPRegInfo el3_regs
[] = {
5197 { .name
= "RVBAR_EL3", .state
= ARM_CP_STATE_AA64
,
5198 .opc0
= 3, .opc1
= 6, .crn
= 12, .crm
= 0, .opc2
= 1,
5199 .type
= ARM_CP_CONST
, .access
= PL3_R
, .resetvalue
= cpu
->rvbar
},
5200 { .name
= "SCTLR_EL3", .state
= ARM_CP_STATE_AA64
,
5201 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 0,
5203 .raw_writefn
= raw_write
, .writefn
= sctlr_write
,
5204 .fieldoffset
= offsetof(CPUARMState
, cp15
.sctlr_el
[3]),
5205 .resetvalue
= cpu
->reset_sctlr
},
5209 define_arm_cp_regs(cpu
, el3_regs
);
5211 /* The behaviour of NSACR is sufficiently various that we don't
5212 * try to describe it in a single reginfo:
5213 * if EL3 is 64 bit, then trap to EL3 from S EL1,
5214 * reads as constant 0xc00 from NS EL1 and NS EL2
5215 * if EL3 is 32 bit, then RW at EL3, RO at NS EL1 and NS EL2
5216 * if v7 without EL3, register doesn't exist
5217 * if v8 without EL3, reads as constant 0xc00 from NS EL1 and NS EL2
5219 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
5220 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5221 ARMCPRegInfo nsacr
= {
5222 .name
= "NSACR", .type
= ARM_CP_CONST
,
5223 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5224 .access
= PL1_RW
, .accessfn
= nsacr_access
,
5227 define_one_arm_cp_reg(cpu
, &nsacr
);
5229 ARMCPRegInfo nsacr
= {
5231 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5232 .access
= PL3_RW
| PL1_R
,
5234 .fieldoffset
= offsetof(CPUARMState
, cp15
.nsacr
)
5236 define_one_arm_cp_reg(cpu
, &nsacr
);
5239 if (arm_feature(env
, ARM_FEATURE_V8
)) {
5240 ARMCPRegInfo nsacr
= {
5241 .name
= "NSACR", .type
= ARM_CP_CONST
,
5242 .cp
= 15, .opc1
= 0, .crn
= 1, .crm
= 1, .opc2
= 2,
5246 define_one_arm_cp_reg(cpu
, &nsacr
);
5250 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
5251 if (arm_feature(env
, ARM_FEATURE_V6
)) {
5252 /* PMSAv6 not implemented */
5253 assert(arm_feature(env
, ARM_FEATURE_V7
));
5254 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
5255 define_arm_cp_regs(cpu
, pmsav7_cp_reginfo
);
5257 define_arm_cp_regs(cpu
, pmsav5_cp_reginfo
);
5260 define_arm_cp_regs(cpu
, vmsa_pmsa_cp_reginfo
);
5261 define_arm_cp_regs(cpu
, vmsa_cp_reginfo
);
5263 if (arm_feature(env
, ARM_FEATURE_THUMB2EE
)) {
5264 define_arm_cp_regs(cpu
, t2ee_cp_reginfo
);
5266 if (arm_feature(env
, ARM_FEATURE_GENERIC_TIMER
)) {
5267 define_arm_cp_regs(cpu
, generic_timer_cp_reginfo
);
5269 if (arm_feature(env
, ARM_FEATURE_VAPA
)) {
5270 define_arm_cp_regs(cpu
, vapa_cp_reginfo
);
5272 if (arm_feature(env
, ARM_FEATURE_CACHE_TEST_CLEAN
)) {
5273 define_arm_cp_regs(cpu
, cache_test_clean_cp_reginfo
);
5275 if (arm_feature(env
, ARM_FEATURE_CACHE_DIRTY_REG
)) {
5276 define_arm_cp_regs(cpu
, cache_dirty_status_cp_reginfo
);
5278 if (arm_feature(env
, ARM_FEATURE_CACHE_BLOCK_OPS
)) {
5279 define_arm_cp_regs(cpu
, cache_block_ops_cp_reginfo
);
5281 if (arm_feature(env
, ARM_FEATURE_OMAPCP
)) {
5282 define_arm_cp_regs(cpu
, omap_cp_reginfo
);
5284 if (arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
5285 define_arm_cp_regs(cpu
, strongarm_cp_reginfo
);
5287 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
5288 define_arm_cp_regs(cpu
, xscale_cp_reginfo
);
5290 if (arm_feature(env
, ARM_FEATURE_DUMMY_C15_REGS
)) {
5291 define_arm_cp_regs(cpu
, dummy_c15_cp_reginfo
);
5293 if (arm_feature(env
, ARM_FEATURE_LPAE
)) {
5294 define_arm_cp_regs(cpu
, lpae_cp_reginfo
);
5296 /* Slightly awkwardly, the OMAP and StrongARM cores need all of
5297 * cp15 crn=0 to be writes-ignored, whereas for other cores they should
5298 * be read-only (ie write causes UNDEF exception).
5301 ARMCPRegInfo id_pre_v8_midr_cp_reginfo
[] = {
5302 /* Pre-v8 MIDR space.
5303 * Note that the MIDR isn't a simple constant register because
5304 * of the TI925 behaviour where writes to another register can
5305 * cause the MIDR value to change.
5307 * Unimplemented registers in the c15 0 0 0 space default to
5308 * MIDR. Define MIDR first as this entire space, then CTR, TCMTR
5309 * and friends override accordingly.
5312 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= CP_ANY
,
5313 .access
= PL1_R
, .resetvalue
= cpu
->midr
,
5314 .writefn
= arm_cp_write_ignore
, .raw_writefn
= raw_write
,
5315 .readfn
= midr_read
,
5316 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
5317 .type
= ARM_CP_OVERRIDE
},
5318 /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
5320 .cp
= 15, .crn
= 0, .crm
= 3, .opc1
= 0, .opc2
= CP_ANY
,
5321 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5323 .cp
= 15, .crn
= 0, .crm
= 4, .opc1
= 0, .opc2
= CP_ANY
,
5324 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5326 .cp
= 15, .crn
= 0, .crm
= 5, .opc1
= 0, .opc2
= CP_ANY
,
5327 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5329 .cp
= 15, .crn
= 0, .crm
= 6, .opc1
= 0, .opc2
= CP_ANY
,
5330 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5332 .cp
= 15, .crn
= 0, .crm
= 7, .opc1
= 0, .opc2
= CP_ANY
,
5333 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5336 ARMCPRegInfo id_v8_midr_cp_reginfo
[] = {
5337 { .name
= "MIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
5338 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 0,
5339 .access
= PL1_R
, .type
= ARM_CP_NO_RAW
, .resetvalue
= cpu
->midr
,
5340 .fieldoffset
= offsetof(CPUARMState
, cp15
.c0_cpuid
),
5341 .readfn
= midr_read
},
5342 /* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
5343 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
5344 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
5345 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
5346 { .name
= "MIDR", .type
= ARM_CP_ALIAS
| ARM_CP_CONST
,
5347 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 7,
5348 .access
= PL1_R
, .resetvalue
= cpu
->midr
},
5349 { .name
= "REVIDR_EL1", .state
= ARM_CP_STATE_BOTH
,
5350 .opc0
= 3, .opc1
= 0, .crn
= 0, .crm
= 0, .opc2
= 6,
5351 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->revidr
},
5354 ARMCPRegInfo id_cp_reginfo
[] = {
5355 /* These are common to v8 and pre-v8 */
5357 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 1,
5358 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
5359 { .name
= "CTR_EL0", .state
= ARM_CP_STATE_AA64
,
5360 .opc0
= 3, .opc1
= 3, .opc2
= 1, .crn
= 0, .crm
= 0,
5361 .access
= PL0_R
, .accessfn
= ctr_el0_access
,
5362 .type
= ARM_CP_CONST
, .resetvalue
= cpu
->ctr
},
5363 /* TCMTR and TLBTR exist in v8 but have no 64-bit versions */
5365 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 2,
5366 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0 },
5369 /* TLBTR is specific to VMSA */
5370 ARMCPRegInfo id_tlbtr_reginfo
= {
5372 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 3,
5373 .access
= PL1_R
, .type
= ARM_CP_CONST
, .resetvalue
= 0,
5375 /* MPUIR is specific to PMSA V6+ */
5376 ARMCPRegInfo id_mpuir_reginfo
= {
5378 .cp
= 15, .crn
= 0, .crm
= 0, .opc1
= 0, .opc2
= 4,
5379 .access
= PL1_R
, .type
= ARM_CP_CONST
,
5380 .resetvalue
= cpu
->pmsav7_dregion
<< 8
5382 ARMCPRegInfo crn0_wi_reginfo
= {
5383 .name
= "CRN0_WI", .cp
= 15, .crn
= 0, .crm
= CP_ANY
,
5384 .opc1
= CP_ANY
, .opc2
= CP_ANY
, .access
= PL1_W
,
5385 .type
= ARM_CP_NOP
| ARM_CP_OVERRIDE
5387 if (arm_feature(env
, ARM_FEATURE_OMAPCP
) ||
5388 arm_feature(env
, ARM_FEATURE_STRONGARM
)) {
5390 /* Register the blanket "writes ignored" value first to cover the
5391 * whole space. Then update the specific ID registers to allow write
5392 * access, so that they ignore writes rather than causing them to
5395 define_one_arm_cp_reg(cpu
, &crn0_wi_reginfo
);
5396 for (r
= id_pre_v8_midr_cp_reginfo
;
5397 r
->type
!= ARM_CP_SENTINEL
; r
++) {
5400 for (r
= id_cp_reginfo
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
5403 id_mpuir_reginfo
.access
= PL1_RW
;
5404 id_tlbtr_reginfo
.access
= PL1_RW
;
5406 if (arm_feature(env
, ARM_FEATURE_V8
)) {
5407 define_arm_cp_regs(cpu
, id_v8_midr_cp_reginfo
);
5409 define_arm_cp_regs(cpu
, id_pre_v8_midr_cp_reginfo
);
5411 define_arm_cp_regs(cpu
, id_cp_reginfo
);
5412 if (!arm_feature(env
, ARM_FEATURE_PMSA
)) {
5413 define_one_arm_cp_reg(cpu
, &id_tlbtr_reginfo
);
5414 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
5415 define_one_arm_cp_reg(cpu
, &id_mpuir_reginfo
);
5419 if (arm_feature(env
, ARM_FEATURE_MPIDR
)) {
5420 define_arm_cp_regs(cpu
, mpidr_cp_reginfo
);
5423 if (arm_feature(env
, ARM_FEATURE_AUXCR
)) {
5424 ARMCPRegInfo auxcr_reginfo
[] = {
5425 { .name
= "ACTLR_EL1", .state
= ARM_CP_STATE_BOTH
,
5426 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 1,
5427 .access
= PL1_RW
, .type
= ARM_CP_CONST
,
5428 .resetvalue
= cpu
->reset_auxcr
},
5429 { .name
= "ACTLR_EL2", .state
= ARM_CP_STATE_BOTH
,
5430 .opc0
= 3, .opc1
= 4, .crn
= 1, .crm
= 0, .opc2
= 1,
5431 .access
= PL2_RW
, .type
= ARM_CP_CONST
,
5433 { .name
= "ACTLR_EL3", .state
= ARM_CP_STATE_AA64
,
5434 .opc0
= 3, .opc1
= 6, .crn
= 1, .crm
= 0, .opc2
= 1,
5435 .access
= PL3_RW
, .type
= ARM_CP_CONST
,
5439 define_arm_cp_regs(cpu
, auxcr_reginfo
);
5442 if (arm_feature(env
, ARM_FEATURE_CBAR
)) {
5443 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5444 /* 32 bit view is [31:18] 0...0 [43:32]. */
5445 uint32_t cbar32
= (extract64(cpu
->reset_cbar
, 18, 14) << 18)
5446 | extract64(cpu
->reset_cbar
, 32, 12);
5447 ARMCPRegInfo cbar_reginfo
[] = {
5449 .type
= ARM_CP_CONST
,
5450 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
5451 .access
= PL1_R
, .resetvalue
= cpu
->reset_cbar
},
5452 { .name
= "CBAR_EL1", .state
= ARM_CP_STATE_AA64
,
5453 .type
= ARM_CP_CONST
,
5454 .opc0
= 3, .opc1
= 1, .crn
= 15, .crm
= 3, .opc2
= 0,
5455 .access
= PL1_R
, .resetvalue
= cbar32
},
5458 /* We don't implement a r/w 64 bit CBAR currently */
5459 assert(arm_feature(env
, ARM_FEATURE_CBAR_RO
));
5460 define_arm_cp_regs(cpu
, cbar_reginfo
);
5462 ARMCPRegInfo cbar
= {
5464 .cp
= 15, .crn
= 15, .crm
= 0, .opc1
= 4, .opc2
= 0,
5465 .access
= PL1_R
|PL3_W
, .resetvalue
= cpu
->reset_cbar
,
5466 .fieldoffset
= offsetof(CPUARMState
,
5467 cp15
.c15_config_base_address
)
5469 if (arm_feature(env
, ARM_FEATURE_CBAR_RO
)) {
5470 cbar
.access
= PL1_R
;
5471 cbar
.fieldoffset
= 0;
5472 cbar
.type
= ARM_CP_CONST
;
5474 define_one_arm_cp_reg(cpu
, &cbar
);
5478 if (arm_feature(env
, ARM_FEATURE_VBAR
)) {
5479 ARMCPRegInfo vbar_cp_reginfo
[] = {
5480 { .name
= "VBAR", .state
= ARM_CP_STATE_BOTH
,
5481 .opc0
= 3, .crn
= 12, .crm
= 0, .opc1
= 0, .opc2
= 0,
5482 .access
= PL1_RW
, .writefn
= vbar_write
,
5483 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.vbar_s
),
5484 offsetof(CPUARMState
, cp15
.vbar_ns
) },
5488 define_arm_cp_regs(cpu
, vbar_cp_reginfo
);
5491 /* Generic registers whose values depend on the implementation */
5493 ARMCPRegInfo sctlr
= {
5494 .name
= "SCTLR", .state
= ARM_CP_STATE_BOTH
,
5495 .opc0
= 3, .opc1
= 0, .crn
= 1, .crm
= 0, .opc2
= 0,
5497 .bank_fieldoffsets
= { offsetof(CPUARMState
, cp15
.sctlr_s
),
5498 offsetof(CPUARMState
, cp15
.sctlr_ns
) },
5499 .writefn
= sctlr_write
, .resetvalue
= cpu
->reset_sctlr
,
5500 .raw_writefn
= raw_write
,
5502 if (arm_feature(env
, ARM_FEATURE_XSCALE
)) {
5503 /* Normally we would always end the TB on an SCTLR write, but Linux
5504 * arch/arm/mach-pxa/sleep.S expects two instructions following
5505 * an MMU enable to execute from cache. Imitate this behaviour.
5507 sctlr
.type
|= ARM_CP_SUPPRESS_TB_END
;
5509 define_one_arm_cp_reg(cpu
, &sctlr
);
5512 if (arm_feature(env
, ARM_FEATURE_SVE
)) {
5513 define_one_arm_cp_reg(cpu
, &zcr_el1_reginfo
);
5514 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
5515 define_one_arm_cp_reg(cpu
, &zcr_el2_reginfo
);
5517 define_one_arm_cp_reg(cpu
, &zcr_no_el2_reginfo
);
5519 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
5520 define_one_arm_cp_reg(cpu
, &zcr_el3_reginfo
);
5525 void arm_cpu_register_gdb_regs_for_features(ARMCPU
*cpu
)
5527 CPUState
*cs
= CPU(cpu
);
5528 CPUARMState
*env
= &cpu
->env
;
5530 if (arm_feature(env
, ARM_FEATURE_AARCH64
)) {
5531 gdb_register_coprocessor(cs
, aarch64_fpu_gdb_get_reg
,
5532 aarch64_fpu_gdb_set_reg
,
5533 34, "aarch64-fpu.xml", 0);
5534 } else if (arm_feature(env
, ARM_FEATURE_NEON
)) {
5535 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5536 51, "arm-neon.xml", 0);
5537 } else if (arm_feature(env
, ARM_FEATURE_VFP3
)) {
5538 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5539 35, "arm-vfp3.xml", 0);
5540 } else if (arm_feature(env
, ARM_FEATURE_VFP
)) {
5541 gdb_register_coprocessor(cs
, vfp_gdb_get_reg
, vfp_gdb_set_reg
,
5542 19, "arm-vfp.xml", 0);
5544 gdb_register_coprocessor(cs
, arm_gdb_get_sysreg
, arm_gdb_set_sysreg
,
5545 arm_gen_dynamic_xml(cs
),
5546 "system-registers.xml", 0);
5549 /* Sort alphabetically by type name, except for "any". */
5550 static gint
arm_cpu_list_compare(gconstpointer a
, gconstpointer b
)
5552 ObjectClass
*class_a
= (ObjectClass
*)a
;
5553 ObjectClass
*class_b
= (ObjectClass
*)b
;
5554 const char *name_a
, *name_b
;
5556 name_a
= object_class_get_name(class_a
);
5557 name_b
= object_class_get_name(class_b
);
5558 if (strcmp(name_a
, "any-" TYPE_ARM_CPU
) == 0) {
5560 } else if (strcmp(name_b
, "any-" TYPE_ARM_CPU
) == 0) {
5563 return strcmp(name_a
, name_b
);
5567 static void arm_cpu_list_entry(gpointer data
, gpointer user_data
)
5569 ObjectClass
*oc
= data
;
5570 CPUListState
*s
= user_data
;
5571 const char *typename
;
5574 typename
= object_class_get_name(oc
);
5575 name
= g_strndup(typename
, strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
5576 (*s
->cpu_fprintf
)(s
->file
, " %s\n",
5581 void arm_cpu_list(FILE *f
, fprintf_function cpu_fprintf
)
5585 .cpu_fprintf
= cpu_fprintf
,
5589 list
= object_class_get_list(TYPE_ARM_CPU
, false);
5590 list
= g_slist_sort(list
, arm_cpu_list_compare
);
5591 (*cpu_fprintf
)(f
, "Available CPUs:\n");
5592 g_slist_foreach(list
, arm_cpu_list_entry
, &s
);
5596 static void arm_cpu_add_definition(gpointer data
, gpointer user_data
)
5598 ObjectClass
*oc
= data
;
5599 CpuDefinitionInfoList
**cpu_list
= user_data
;
5600 CpuDefinitionInfoList
*entry
;
5601 CpuDefinitionInfo
*info
;
5602 const char *typename
;
5604 typename
= object_class_get_name(oc
);
5605 info
= g_malloc0(sizeof(*info
));
5606 info
->name
= g_strndup(typename
,
5607 strlen(typename
) - strlen("-" TYPE_ARM_CPU
));
5608 info
->q_typename
= g_strdup(typename
);
5610 entry
= g_malloc0(sizeof(*entry
));
5611 entry
->value
= info
;
5612 entry
->next
= *cpu_list
;
5616 CpuDefinitionInfoList
*arch_query_cpu_definitions(Error
**errp
)
5618 CpuDefinitionInfoList
*cpu_list
= NULL
;
5621 list
= object_class_get_list(TYPE_ARM_CPU
, false);
5622 g_slist_foreach(list
, arm_cpu_add_definition
, &cpu_list
);
5628 static void add_cpreg_to_hashtable(ARMCPU
*cpu
, const ARMCPRegInfo
*r
,
5629 void *opaque
, int state
, int secstate
,
5630 int crm
, int opc1
, int opc2
,
5633 /* Private utility function for define_one_arm_cp_reg_with_opaque():
5634 * add a single reginfo struct to the hash table.
5636 uint32_t *key
= g_new(uint32_t, 1);
5637 ARMCPRegInfo
*r2
= g_memdup(r
, sizeof(ARMCPRegInfo
));
5638 int is64
= (r
->type
& ARM_CP_64BIT
) ? 1 : 0;
5639 int ns
= (secstate
& ARM_CP_SECSTATE_NS
) ? 1 : 0;
5641 r2
->name
= g_strdup(name
);
5642 /* Reset the secure state to the specific incoming state. This is
5643 * necessary as the register may have been defined with both states.
5645 r2
->secure
= secstate
;
5647 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
5648 /* Register is banked (using both entries in array).
5649 * Overwriting fieldoffset as the array is only used to define
5650 * banked registers but later only fieldoffset is used.
5652 r2
->fieldoffset
= r
->bank_fieldoffsets
[ns
];
5655 if (state
== ARM_CP_STATE_AA32
) {
5656 if (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1]) {
5657 /* If the register is banked then we don't need to migrate or
5658 * reset the 32-bit instance in certain cases:
5660 * 1) If the register has both 32-bit and 64-bit instances then we
5661 * can count on the 64-bit instance taking care of the
5663 * 2) If ARMv8 is enabled then we can count on a 64-bit version
5664 * taking care of the secure bank. This requires that separate
5665 * 32 and 64-bit definitions are provided.
5667 if ((r
->state
== ARM_CP_STATE_BOTH
&& ns
) ||
5668 (arm_feature(&cpu
->env
, ARM_FEATURE_V8
) && !ns
)) {
5669 r2
->type
|= ARM_CP_ALIAS
;
5671 } else if ((secstate
!= r
->secure
) && !ns
) {
5672 /* The register is not banked so we only want to allow migration of
5673 * the non-secure instance.
5675 r2
->type
|= ARM_CP_ALIAS
;
5678 if (r
->state
== ARM_CP_STATE_BOTH
) {
5679 /* We assume it is a cp15 register if the .cp field is left unset.
5685 #ifdef HOST_WORDS_BIGENDIAN
5686 if (r2
->fieldoffset
) {
5687 r2
->fieldoffset
+= sizeof(uint32_t);
5692 if (state
== ARM_CP_STATE_AA64
) {
5693 /* To allow abbreviation of ARMCPRegInfo
5694 * definitions, we treat cp == 0 as equivalent to
5695 * the value for "standard guest-visible sysreg".
5696 * STATE_BOTH definitions are also always "standard
5697 * sysreg" in their AArch64 view (the .cp value may
5698 * be non-zero for the benefit of the AArch32 view).
5700 if (r
->cp
== 0 || r
->state
== ARM_CP_STATE_BOTH
) {
5701 r2
->cp
= CP_REG_ARM64_SYSREG_CP
;
5703 *key
= ENCODE_AA64_CP_REG(r2
->cp
, r2
->crn
, crm
,
5704 r2
->opc0
, opc1
, opc2
);
5706 *key
= ENCODE_CP_REG(r2
->cp
, is64
, ns
, r2
->crn
, crm
, opc1
, opc2
);
5709 r2
->opaque
= opaque
;
5711 /* reginfo passed to helpers is correct for the actual access,
5712 * and is never ARM_CP_STATE_BOTH:
5715 /* Make sure reginfo passed to helpers for wildcarded regs
5716 * has the correct crm/opc1/opc2 for this reg, not CP_ANY:
5721 /* By convention, for wildcarded registers only the first
5722 * entry is used for migration; the others are marked as
5723 * ALIAS so we don't try to transfer the register
5724 * multiple times. Special registers (ie NOP/WFI) are
5725 * never migratable and not even raw-accessible.
5727 if ((r
->type
& ARM_CP_SPECIAL
)) {
5728 r2
->type
|= ARM_CP_NO_RAW
;
5730 if (((r
->crm
== CP_ANY
) && crm
!= 0) ||
5731 ((r
->opc1
== CP_ANY
) && opc1
!= 0) ||
5732 ((r
->opc2
== CP_ANY
) && opc2
!= 0)) {
5733 r2
->type
|= ARM_CP_ALIAS
| ARM_CP_NO_GDB
;
5736 /* Check that raw accesses are either forbidden or handled. Note that
5737 * we can't assert this earlier because the setup of fieldoffset for
5738 * banked registers has to be done first.
5740 if (!(r2
->type
& ARM_CP_NO_RAW
)) {
5741 assert(!raw_accessors_invalid(r2
));
5744 /* Overriding of an existing definition must be explicitly
5747 if (!(r
->type
& ARM_CP_OVERRIDE
)) {
5748 ARMCPRegInfo
*oldreg
;
5749 oldreg
= g_hash_table_lookup(cpu
->cp_regs
, key
);
5750 if (oldreg
&& !(oldreg
->type
& ARM_CP_OVERRIDE
)) {
5751 fprintf(stderr
, "Register redefined: cp=%d %d bit "
5752 "crn=%d crm=%d opc1=%d opc2=%d, "
5753 "was %s, now %s\n", r2
->cp
, 32 + 32 * is64
,
5754 r2
->crn
, r2
->crm
, r2
->opc1
, r2
->opc2
,
5755 oldreg
->name
, r2
->name
);
5756 g_assert_not_reached();
5759 g_hash_table_insert(cpu
->cp_regs
, key
, r2
);
5763 void define_one_arm_cp_reg_with_opaque(ARMCPU
*cpu
,
5764 const ARMCPRegInfo
*r
, void *opaque
)
5766 /* Define implementations of coprocessor registers.
5767 * We store these in a hashtable because typically
5768 * there are less than 150 registers in a space which
5769 * is 16*16*16*8*8 = 262144 in size.
5770 * Wildcarding is supported for the crm, opc1 and opc2 fields.
5771 * If a register is defined twice then the second definition is
5772 * used, so this can be used to define some generic registers and
5773 * then override them with implementation specific variations.
5774 * At least one of the original and the second definition should
5775 * include ARM_CP_OVERRIDE in its type bits -- this is just a guard
5776 * against accidental use.
5778 * The state field defines whether the register is to be
5779 * visible in the AArch32 or AArch64 execution state. If the
5780 * state is set to ARM_CP_STATE_BOTH then we synthesise a
5781 * reginfo structure for the AArch32 view, which sees the lower
5782 * 32 bits of the 64 bit register.
5784 * Only registers visible in AArch64 may set r->opc0; opc0 cannot
5785 * be wildcarded. AArch64 registers are always considered to be 64
5786 * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
5787 * the register, if any.
5789 int crm
, opc1
, opc2
, state
;
5790 int crmmin
= (r
->crm
== CP_ANY
) ? 0 : r
->crm
;
5791 int crmmax
= (r
->crm
== CP_ANY
) ? 15 : r
->crm
;
5792 int opc1min
= (r
->opc1
== CP_ANY
) ? 0 : r
->opc1
;
5793 int opc1max
= (r
->opc1
== CP_ANY
) ? 7 : r
->opc1
;
5794 int opc2min
= (r
->opc2
== CP_ANY
) ? 0 : r
->opc2
;
5795 int opc2max
= (r
->opc2
== CP_ANY
) ? 7 : r
->opc2
;
5796 /* 64 bit registers have only CRm and Opc1 fields */
5797 assert(!((r
->type
& ARM_CP_64BIT
) && (r
->opc2
|| r
->crn
)));
5798 /* op0 only exists in the AArch64 encodings */
5799 assert((r
->state
!= ARM_CP_STATE_AA32
) || (r
->opc0
== 0));
5800 /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
5801 assert((r
->state
!= ARM_CP_STATE_AA64
) || !(r
->type
& ARM_CP_64BIT
));
5802 /* The AArch64 pseudocode CheckSystemAccess() specifies that op1
5803 * encodes a minimum access level for the register. We roll this
5804 * runtime check into our general permission check code, so check
5805 * here that the reginfo's specified permissions are strict enough
5806 * to encompass the generic architectural permission check.
5808 if (r
->state
!= ARM_CP_STATE_AA32
) {
5811 case 0: case 1: case 2:
5824 /* unallocated encoding, so not possible */
5832 /* min_EL EL1, secure mode only (we don't check the latter) */
5836 /* broken reginfo with out-of-range opc1 */
5840 /* assert our permissions are not too lax (stricter is fine) */
5841 assert((r
->access
& ~mask
) == 0);
5844 /* Check that the register definition has enough info to handle
5845 * reads and writes if they are permitted.
5847 if (!(r
->type
& (ARM_CP_SPECIAL
|ARM_CP_CONST
))) {
5848 if (r
->access
& PL3_R
) {
5849 assert((r
->fieldoffset
||
5850 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
5853 if (r
->access
& PL3_W
) {
5854 assert((r
->fieldoffset
||
5855 (r
->bank_fieldoffsets
[0] && r
->bank_fieldoffsets
[1])) ||
5859 /* Bad type field probably means missing sentinel at end of reg list */
5860 assert(cptype_valid(r
->type
));
5861 for (crm
= crmmin
; crm
<= crmmax
; crm
++) {
5862 for (opc1
= opc1min
; opc1
<= opc1max
; opc1
++) {
5863 for (opc2
= opc2min
; opc2
<= opc2max
; opc2
++) {
5864 for (state
= ARM_CP_STATE_AA32
;
5865 state
<= ARM_CP_STATE_AA64
; state
++) {
5866 if (r
->state
!= state
&& r
->state
!= ARM_CP_STATE_BOTH
) {
5869 if (state
== ARM_CP_STATE_AA32
) {
5870 /* Under AArch32 CP registers can be common
5871 * (same for secure and non-secure world) or banked.
5875 switch (r
->secure
) {
5876 case ARM_CP_SECSTATE_S
:
5877 case ARM_CP_SECSTATE_NS
:
5878 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5879 r
->secure
, crm
, opc1
, opc2
,
5883 name
= g_strdup_printf("%s_S", r
->name
);
5884 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5886 crm
, opc1
, opc2
, name
);
5888 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5890 crm
, opc1
, opc2
, r
->name
);
5894 /* AArch64 registers get mapped to non-secure instance
5896 add_cpreg_to_hashtable(cpu
, r
, opaque
, state
,
5898 crm
, opc1
, opc2
, r
->name
);
5906 void define_arm_cp_regs_with_opaque(ARMCPU
*cpu
,
5907 const ARMCPRegInfo
*regs
, void *opaque
)
5909 /* Define a whole list of registers */
5910 const ARMCPRegInfo
*r
;
5911 for (r
= regs
; r
->type
!= ARM_CP_SENTINEL
; r
++) {
5912 define_one_arm_cp_reg_with_opaque(cpu
, r
, opaque
);
5916 const ARMCPRegInfo
*get_arm_cp_reginfo(GHashTable
*cpregs
, uint32_t encoded_cp
)
5918 return g_hash_table_lookup(cpregs
, &encoded_cp
);
5921 void arm_cp_write_ignore(CPUARMState
*env
, const ARMCPRegInfo
*ri
,
5924 /* Helper coprocessor write function for write-ignore registers */
5927 uint64_t arm_cp_read_zero(CPUARMState
*env
, const ARMCPRegInfo
*ri
)
5929 /* Helper coprocessor write function for read-as-zero registers */
5933 void arm_cp_reset_ignore(CPUARMState
*env
, const ARMCPRegInfo
*opaque
)
5935 /* Helper coprocessor reset function for do-nothing-on-reset registers */
5938 static int bad_mode_switch(CPUARMState
*env
, int mode
, CPSRWriteType write_type
)
5940 /* Return true if it is not valid for us to switch to
5941 * this CPU mode (ie all the UNPREDICTABLE cases in
5942 * the ARM ARM CPSRWriteByInstr pseudocode).
5945 /* Changes to or from Hyp via MSR and CPS are illegal. */
5946 if (write_type
== CPSRWriteByInstr
&&
5947 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_HYP
||
5948 mode
== ARM_CPU_MODE_HYP
)) {
5953 case ARM_CPU_MODE_USR
:
5955 case ARM_CPU_MODE_SYS
:
5956 case ARM_CPU_MODE_SVC
:
5957 case ARM_CPU_MODE_ABT
:
5958 case ARM_CPU_MODE_UND
:
5959 case ARM_CPU_MODE_IRQ
:
5960 case ARM_CPU_MODE_FIQ
:
5961 /* Note that we don't implement the IMPDEF NSACR.RFR which in v7
5962 * allows FIQ mode to be Secure-only. (In v8 this doesn't exist.)
5964 /* If HCR.TGE is set then changes from Monitor to NS PL1 via MSR
5965 * and CPS are treated as illegal mode changes.
5967 if (write_type
== CPSRWriteByInstr
&&
5968 (env
->cp15
.hcr_el2
& HCR_TGE
) &&
5969 (env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
&&
5970 !arm_is_secure_below_el3(env
)) {
5974 case ARM_CPU_MODE_HYP
:
5975 return !arm_feature(env
, ARM_FEATURE_EL2
)
5976 || arm_current_el(env
) < 2 || arm_is_secure(env
);
5977 case ARM_CPU_MODE_MON
:
5978 return arm_current_el(env
) < 3;
5984 uint32_t cpsr_read(CPUARMState
*env
)
5987 ZF
= (env
->ZF
== 0);
5988 return env
->uncached_cpsr
| (env
->NF
& 0x80000000) | (ZF
<< 30) |
5989 (env
->CF
<< 29) | ((env
->VF
& 0x80000000) >> 3) | (env
->QF
<< 27)
5990 | (env
->thumb
<< 5) | ((env
->condexec_bits
& 3) << 25)
5991 | ((env
->condexec_bits
& 0xfc) << 8)
5992 | (env
->GE
<< 16) | (env
->daif
& CPSR_AIF
);
5995 void cpsr_write(CPUARMState
*env
, uint32_t val
, uint32_t mask
,
5996 CPSRWriteType write_type
)
5998 uint32_t changed_daif
;
6000 if (mask
& CPSR_NZCV
) {
6001 env
->ZF
= (~val
) & CPSR_Z
;
6003 env
->CF
= (val
>> 29) & 1;
6004 env
->VF
= (val
<< 3) & 0x80000000;
6007 env
->QF
= ((val
& CPSR_Q
) != 0);
6009 env
->thumb
= ((val
& CPSR_T
) != 0);
6010 if (mask
& CPSR_IT_0_1
) {
6011 env
->condexec_bits
&= ~3;
6012 env
->condexec_bits
|= (val
>> 25) & 3;
6014 if (mask
& CPSR_IT_2_7
) {
6015 env
->condexec_bits
&= 3;
6016 env
->condexec_bits
|= (val
>> 8) & 0xfc;
6018 if (mask
& CPSR_GE
) {
6019 env
->GE
= (val
>> 16) & 0xf;
6022 /* In a V7 implementation that includes the security extensions but does
6023 * not include Virtualization Extensions the SCR.FW and SCR.AW bits control
6024 * whether non-secure software is allowed to change the CPSR_F and CPSR_A
6025 * bits respectively.
6027 * In a V8 implementation, it is permitted for privileged software to
6028 * change the CPSR A/F bits regardless of the SCR.AW/FW bits.
6030 if (write_type
!= CPSRWriteRaw
&& !arm_feature(env
, ARM_FEATURE_V8
) &&
6031 arm_feature(env
, ARM_FEATURE_EL3
) &&
6032 !arm_feature(env
, ARM_FEATURE_EL2
) &&
6033 !arm_is_secure(env
)) {
6035 changed_daif
= (env
->daif
^ val
) & mask
;
6037 if (changed_daif
& CPSR_A
) {
6038 /* Check to see if we are allowed to change the masking of async
6039 * abort exceptions from a non-secure state.
6041 if (!(env
->cp15
.scr_el3
& SCR_AW
)) {
6042 qemu_log_mask(LOG_GUEST_ERROR
,
6043 "Ignoring attempt to switch CPSR_A flag from "
6044 "non-secure world with SCR.AW bit clear\n");
6049 if (changed_daif
& CPSR_F
) {
6050 /* Check to see if we are allowed to change the masking of FIQ
6051 * exceptions from a non-secure state.
6053 if (!(env
->cp15
.scr_el3
& SCR_FW
)) {
6054 qemu_log_mask(LOG_GUEST_ERROR
,
6055 "Ignoring attempt to switch CPSR_F flag from "
6056 "non-secure world with SCR.FW bit clear\n");
6060 /* Check whether non-maskable FIQ (NMFI) support is enabled.
6061 * If this bit is set software is not allowed to mask
6062 * FIQs, but is allowed to set CPSR_F to 0.
6064 if ((A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_NMFI
) &&
6066 qemu_log_mask(LOG_GUEST_ERROR
,
6067 "Ignoring attempt to enable CPSR_F flag "
6068 "(non-maskable FIQ [NMFI] support enabled)\n");
6074 env
->daif
&= ~(CPSR_AIF
& mask
);
6075 env
->daif
|= val
& CPSR_AIF
& mask
;
6077 if (write_type
!= CPSRWriteRaw
&&
6078 ((env
->uncached_cpsr
^ val
) & mask
& CPSR_M
)) {
6079 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
) {
6080 /* Note that we can only get here in USR mode if this is a
6081 * gdb stub write; for this case we follow the architectural
6082 * behaviour for guest writes in USR mode of ignoring an attempt
6083 * to switch mode. (Those are caught by translate.c for writes
6084 * triggered by guest instructions.)
6087 } else if (bad_mode_switch(env
, val
& CPSR_M
, write_type
)) {
6088 /* Attempt to switch to an invalid mode: this is UNPREDICTABLE in
6089 * v7, and has defined behaviour in v8:
6090 * + leave CPSR.M untouched
6091 * + allow changes to the other CPSR fields
6093 * For user changes via the GDB stub, we don't set PSTATE.IL,
6094 * as this would be unnecessarily harsh for a user error.
6097 if (write_type
!= CPSRWriteByGDBStub
&&
6098 arm_feature(env
, ARM_FEATURE_V8
)) {
6103 switch_mode(env
, val
& CPSR_M
);
6106 mask
&= ~CACHED_CPSR_BITS
;
6107 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~mask
) | (val
& mask
);
6110 /* Sign/zero extend */
6111 uint32_t HELPER(sxtb16
)(uint32_t x
)
6114 res
= (uint16_t)(int8_t)x
;
6115 res
|= (uint32_t)(int8_t)(x
>> 16) << 16;
6119 uint32_t HELPER(uxtb16
)(uint32_t x
)
6122 res
= (uint16_t)(uint8_t)x
;
6123 res
|= (uint32_t)(uint8_t)(x
>> 16) << 16;
6127 int32_t HELPER(sdiv
)(int32_t num
, int32_t den
)
6131 if (num
== INT_MIN
&& den
== -1)
6136 uint32_t HELPER(udiv
)(uint32_t num
, uint32_t den
)
6143 uint32_t HELPER(rbit
)(uint32_t x
)
6148 #if defined(CONFIG_USER_ONLY)
6150 /* These should probably raise undefined insn exceptions. */
6151 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t reg
, uint32_t val
)
6153 ARMCPU
*cpu
= arm_env_get_cpu(env
);
6155 cpu_abort(CPU(cpu
), "v7m_msr %d\n", reg
);
6158 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
6160 ARMCPU
*cpu
= arm_env_get_cpu(env
);
6162 cpu_abort(CPU(cpu
), "v7m_mrs %d\n", reg
);
6166 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
6168 /* translate.c should never generate calls here in user-only mode */
6169 g_assert_not_reached();
6172 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
6174 /* translate.c should never generate calls here in user-only mode */
6175 g_assert_not_reached();
6178 uint32_t HELPER(v7m_tt
)(CPUARMState
*env
, uint32_t addr
, uint32_t op
)
6180 /* The TT instructions can be used by unprivileged code, but in
6181 * user-only emulation we don't have the MPU.
6182 * Luckily since we know we are NonSecure unprivileged (and that in
6183 * turn means that the A flag wasn't specified), all the bits in the
6184 * register must be zero:
6185 * IREGION: 0 because IRVALID is 0
6186 * IRVALID: 0 because NS
6188 * NSRW: 0 because NS
6190 * RW: 0 because unpriv and A flag not set
6191 * R: 0 because unpriv and A flag not set
6192 * SRVALID: 0 because NS
6193 * MRVALID: 0 because unpriv and A flag not set
6194 * SREGION: 0 becaus SRVALID is 0
6195 * MREGION: 0 because MRVALID is 0
6200 void switch_mode(CPUARMState
*env
, int mode
)
6202 ARMCPU
*cpu
= arm_env_get_cpu(env
);
6204 if (mode
!= ARM_CPU_MODE_USR
) {
6205 cpu_abort(CPU(cpu
), "Tried to switch out of user mode\n");
6209 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
6210 uint32_t cur_el
, bool secure
)
6215 void aarch64_sync_64_to_32(CPUARMState
*env
)
6217 g_assert_not_reached();
6222 void switch_mode(CPUARMState
*env
, int mode
)
6227 old_mode
= env
->uncached_cpsr
& CPSR_M
;
6228 if (mode
== old_mode
)
6231 if (old_mode
== ARM_CPU_MODE_FIQ
) {
6232 memcpy (env
->fiq_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
6233 memcpy (env
->regs
+ 8, env
->usr_regs
, 5 * sizeof(uint32_t));
6234 } else if (mode
== ARM_CPU_MODE_FIQ
) {
6235 memcpy (env
->usr_regs
, env
->regs
+ 8, 5 * sizeof(uint32_t));
6236 memcpy (env
->regs
+ 8, env
->fiq_regs
, 5 * sizeof(uint32_t));
6239 i
= bank_number(old_mode
);
6240 env
->banked_r13
[i
] = env
->regs
[13];
6241 env
->banked_r14
[i
] = env
->regs
[14];
6242 env
->banked_spsr
[i
] = env
->spsr
;
6244 i
= bank_number(mode
);
6245 env
->regs
[13] = env
->banked_r13
[i
];
6246 env
->regs
[14] = env
->banked_r14
[i
];
6247 env
->spsr
= env
->banked_spsr
[i
];
6250 /* Physical Interrupt Target EL Lookup Table
6252 * [ From ARM ARM section G1.13.4 (Table G1-15) ]
6254 * The below multi-dimensional table is used for looking up the target
6255 * exception level given numerous condition criteria. Specifically, the
6256 * target EL is based on SCR and HCR routing controls as well as the
6257 * currently executing EL and secure state.
6260 * target_el_table[2][2][2][2][2][4]
6261 * | | | | | +--- Current EL
6262 * | | | | +------ Non-secure(0)/Secure(1)
6263 * | | | +--------- HCR mask override
6264 * | | +------------ SCR exec state control
6265 * | +--------------- SCR mask override
6266 * +------------------ 32-bit(0)/64-bit(1) EL3
6268 * The table values are as such:
6272 * The ARM ARM target EL table includes entries indicating that an "exception
6273 * is not taken". The two cases where this is applicable are:
6274 * 1) An exception is taken from EL3 but the SCR does not have the exception
6276 * 2) An exception is taken from EL2 but the HCR does not have the exception
6278 * In these two cases, the below table contain a target of EL1. This value is
6279 * returned as it is expected that the consumer of the table data will check
6280 * for "target EL >= current EL" to ensure the exception is not taken.
6284 * BIT IRQ IMO Non-secure Secure
6285 * EL3 FIQ RW FMO EL0 EL1 EL2 EL3 EL0 EL1 EL2 EL3
6287 static const int8_t target_el_table
[2][2][2][2][2][4] = {
6288 {{{{/* 0 0 0 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
6289 {/* 0 0 0 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},
6290 {{/* 0 0 1 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },},
6291 {/* 0 0 1 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},},
6292 {{{/* 0 1 0 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
6293 {/* 0 1 0 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},
6294 {{/* 0 1 1 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},
6295 {/* 0 1 1 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},},},
6296 {{{{/* 1 0 0 0 */{ 1, 1, 2, -1 },{ 1, 1, -1, 1 },},
6297 {/* 1 0 0 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},
6298 {{/* 1 0 1 0 */{ 1, 1, 1, -1 },{ 1, 1, -1, 1 },},
6299 {/* 1 0 1 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},},
6300 {{{/* 1 1 0 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
6301 {/* 1 1 0 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},
6302 {{/* 1 1 1 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},
6303 {/* 1 1 1 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},},},
6307 * Determine the target EL for physical exceptions
6309 uint32_t arm_phys_excp_target_el(CPUState
*cs
, uint32_t excp_idx
,
6310 uint32_t cur_el
, bool secure
)
6312 CPUARMState
*env
= cs
->env_ptr
;
6317 /* Is the highest EL AArch64? */
6318 int is64
= arm_feature(env
, ARM_FEATURE_AARCH64
);
6320 if (arm_feature(env
, ARM_FEATURE_EL3
)) {
6321 rw
= ((env
->cp15
.scr_el3
& SCR_RW
) == SCR_RW
);
6323 /* Either EL2 is the highest EL (and so the EL2 register width
6324 * is given by is64); or there is no EL2 or EL3, in which case
6325 * the value of 'rw' does not affect the table lookup anyway.
6332 scr
= ((env
->cp15
.scr_el3
& SCR_IRQ
) == SCR_IRQ
);
6333 hcr
= ((env
->cp15
.hcr_el2
& HCR_IMO
) == HCR_IMO
);
6336 scr
= ((env
->cp15
.scr_el3
& SCR_FIQ
) == SCR_FIQ
);
6337 hcr
= ((env
->cp15
.hcr_el2
& HCR_FMO
) == HCR_FMO
);
6340 scr
= ((env
->cp15
.scr_el3
& SCR_EA
) == SCR_EA
);
6341 hcr
= ((env
->cp15
.hcr_el2
& HCR_AMO
) == HCR_AMO
);
6345 /* If HCR.TGE is set then HCR is treated as being 1 */
6346 hcr
|= ((env
->cp15
.hcr_el2
& HCR_TGE
) == HCR_TGE
);
6348 /* Perform a table-lookup for the target EL given the current state */
6349 target_el
= target_el_table
[is64
][scr
][rw
][hcr
][secure
][cur_el
];
6351 assert(target_el
> 0);
6356 static bool v7m_stack_write(ARMCPU
*cpu
, uint32_t addr
, uint32_t value
,
6357 ARMMMUIdx mmu_idx
, bool ignfault
)
6359 CPUState
*cs
= CPU(cpu
);
6360 CPUARMState
*env
= &cpu
->env
;
6361 MemTxAttrs attrs
= {};
6363 target_ulong page_size
;
6367 bool secure
= mmu_idx
& ARM_MMU_IDX_M_S
;
6371 if (get_phys_addr(env
, addr
, MMU_DATA_STORE
, mmu_idx
, &physaddr
,
6372 &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
6373 /* MPU/SAU lookup failed */
6374 if (fi
.type
== ARMFault_QEMU_SFault
) {
6375 qemu_log_mask(CPU_LOG_INT
,
6376 "...SecureFault with SFSR.AUVIOL during stacking\n");
6377 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
| R_V7M_SFSR_SFARVALID_MASK
;
6378 env
->v7m
.sfar
= addr
;
6379 exc
= ARMV7M_EXCP_SECURE
;
6382 qemu_log_mask(CPU_LOG_INT
, "...MemManageFault with CFSR.MSTKERR\n");
6383 env
->v7m
.cfsr
[secure
] |= R_V7M_CFSR_MSTKERR_MASK
;
6384 exc
= ARMV7M_EXCP_MEM
;
6385 exc_secure
= secure
;
6389 address_space_stl_le(arm_addressspace(cs
, attrs
), physaddr
, value
,
6391 if (txres
!= MEMTX_OK
) {
6392 /* BusFault trying to write the data */
6393 qemu_log_mask(CPU_LOG_INT
, "...BusFault with BFSR.STKERR\n");
6394 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_STKERR_MASK
;
6395 exc
= ARMV7M_EXCP_BUS
;
6402 /* By pending the exception at this point we are making
6403 * the IMPDEF choice "overridden exceptions pended" (see the
6404 * MergeExcInfo() pseudocode). The other choice would be to not
6405 * pend them now and then make a choice about which to throw away
6406 * later if we have two derived exceptions.
6407 * The only case when we must not pend the exception but instead
6408 * throw it away is if we are doing the push of the callee registers
6409 * and we've already generated a derived exception. Even in this
6410 * case we will still update the fault status registers.
6413 armv7m_nvic_set_pending_derived(env
->nvic
, exc
, exc_secure
);
6418 static bool v7m_stack_read(ARMCPU
*cpu
, uint32_t *dest
, uint32_t addr
,
6421 CPUState
*cs
= CPU(cpu
);
6422 CPUARMState
*env
= &cpu
->env
;
6423 MemTxAttrs attrs
= {};
6425 target_ulong page_size
;
6429 bool secure
= mmu_idx
& ARM_MMU_IDX_M_S
;
6434 if (get_phys_addr(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &physaddr
,
6435 &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
6436 /* MPU/SAU lookup failed */
6437 if (fi
.type
== ARMFault_QEMU_SFault
) {
6438 qemu_log_mask(CPU_LOG_INT
,
6439 "...SecureFault with SFSR.AUVIOL during unstack\n");
6440 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
| R_V7M_SFSR_SFARVALID_MASK
;
6441 env
->v7m
.sfar
= addr
;
6442 exc
= ARMV7M_EXCP_SECURE
;
6445 qemu_log_mask(CPU_LOG_INT
,
6446 "...MemManageFault with CFSR.MUNSTKERR\n");
6447 env
->v7m
.cfsr
[secure
] |= R_V7M_CFSR_MUNSTKERR_MASK
;
6448 exc
= ARMV7M_EXCP_MEM
;
6449 exc_secure
= secure
;
6454 value
= address_space_ldl(arm_addressspace(cs
, attrs
), physaddr
,
6456 if (txres
!= MEMTX_OK
) {
6457 /* BusFault trying to read the data */
6458 qemu_log_mask(CPU_LOG_INT
, "...BusFault with BFSR.UNSTKERR\n");
6459 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_UNSTKERR_MASK
;
6460 exc
= ARMV7M_EXCP_BUS
;
6469 /* By pending the exception at this point we are making
6470 * the IMPDEF choice "overridden exceptions pended" (see the
6471 * MergeExcInfo() pseudocode). The other choice would be to not
6472 * pend them now and then make a choice about which to throw away
6473 * later if we have two derived exceptions.
6475 armv7m_nvic_set_pending(env
->nvic
, exc
, exc_secure
);
6479 /* Return true if we're using the process stack pointer (not the MSP) */
6480 static bool v7m_using_psp(CPUARMState
*env
)
6482 /* Handler mode always uses the main stack; for thread mode
6483 * the CONTROL.SPSEL bit determines the answer.
6484 * Note that in v7M it is not possible to be in Handler mode with
6485 * CONTROL.SPSEL non-zero, but in v8M it is, so we must check both.
6487 return !arm_v7m_is_handler_mode(env
) &&
6488 env
->v7m
.control
[env
->v7m
.secure
] & R_V7M_CONTROL_SPSEL_MASK
;
6491 /* Write to v7M CONTROL.SPSEL bit for the specified security bank.
6492 * This may change the current stack pointer between Main and Process
6493 * stack pointers if it is done for the CONTROL register for the current
6496 static void write_v7m_control_spsel_for_secstate(CPUARMState
*env
,
6500 bool old_is_psp
= v7m_using_psp(env
);
6502 env
->v7m
.control
[secstate
] =
6503 deposit32(env
->v7m
.control
[secstate
],
6504 R_V7M_CONTROL_SPSEL_SHIFT
,
6505 R_V7M_CONTROL_SPSEL_LENGTH
, new_spsel
);
6507 if (secstate
== env
->v7m
.secure
) {
6508 bool new_is_psp
= v7m_using_psp(env
);
6511 if (old_is_psp
!= new_is_psp
) {
6512 tmp
= env
->v7m
.other_sp
;
6513 env
->v7m
.other_sp
= env
->regs
[13];
6514 env
->regs
[13] = tmp
;
6519 /* Write to v7M CONTROL.SPSEL bit. This may change the current
6520 * stack pointer between Main and Process stack pointers.
6522 static void write_v7m_control_spsel(CPUARMState
*env
, bool new_spsel
)
6524 write_v7m_control_spsel_for_secstate(env
, new_spsel
, env
->v7m
.secure
);
6527 void write_v7m_exception(CPUARMState
*env
, uint32_t new_exc
)
6529 /* Write a new value to v7m.exception, thus transitioning into or out
6530 * of Handler mode; this may result in a change of active stack pointer.
6532 bool new_is_psp
, old_is_psp
= v7m_using_psp(env
);
6535 env
->v7m
.exception
= new_exc
;
6537 new_is_psp
= v7m_using_psp(env
);
6539 if (old_is_psp
!= new_is_psp
) {
6540 tmp
= env
->v7m
.other_sp
;
6541 env
->v7m
.other_sp
= env
->regs
[13];
6542 env
->regs
[13] = tmp
;
6546 /* Switch M profile security state between NS and S */
6547 static void switch_v7m_security_state(CPUARMState
*env
, bool new_secstate
)
6549 uint32_t new_ss_msp
, new_ss_psp
;
6551 if (env
->v7m
.secure
== new_secstate
) {
6555 /* All the banked state is accessed by looking at env->v7m.secure
6556 * except for the stack pointer; rearrange the SP appropriately.
6558 new_ss_msp
= env
->v7m
.other_ss_msp
;
6559 new_ss_psp
= env
->v7m
.other_ss_psp
;
6561 if (v7m_using_psp(env
)) {
6562 env
->v7m
.other_ss_psp
= env
->regs
[13];
6563 env
->v7m
.other_ss_msp
= env
->v7m
.other_sp
;
6565 env
->v7m
.other_ss_msp
= env
->regs
[13];
6566 env
->v7m
.other_ss_psp
= env
->v7m
.other_sp
;
6569 env
->v7m
.secure
= new_secstate
;
6571 if (v7m_using_psp(env
)) {
6572 env
->regs
[13] = new_ss_psp
;
6573 env
->v7m
.other_sp
= new_ss_msp
;
6575 env
->regs
[13] = new_ss_msp
;
6576 env
->v7m
.other_sp
= new_ss_psp
;
6580 void HELPER(v7m_bxns
)(CPUARMState
*env
, uint32_t dest
)
6583 * - if the return value is a magic value, do exception return (like BX)
6584 * - otherwise bit 0 of the return value is the target security state
6588 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6589 /* Covers FNC_RETURN and EXC_RETURN magic */
6590 min_magic
= FNC_RETURN_MIN_MAGIC
;
6592 /* EXC_RETURN magic only */
6593 min_magic
= EXC_RETURN_MIN_MAGIC
;
6596 if (dest
>= min_magic
) {
6597 /* This is an exception return magic value; put it where
6598 * do_v7m_exception_exit() expects and raise EXCEPTION_EXIT.
6599 * Note that if we ever add gen_ss_advance() singlestep support to
6600 * M profile this should count as an "instruction execution complete"
6601 * event (compare gen_bx_excret_final_code()).
6603 env
->regs
[15] = dest
& ~1;
6604 env
->thumb
= dest
& 1;
6605 HELPER(exception_internal
)(env
, EXCP_EXCEPTION_EXIT
);
6609 /* translate.c should have made BXNS UNDEF unless we're secure */
6610 assert(env
->v7m
.secure
);
6612 switch_v7m_security_state(env
, dest
& 1);
6614 env
->regs
[15] = dest
& ~1;
6617 void HELPER(v7m_blxns
)(CPUARMState
*env
, uint32_t dest
)
6619 /* Handle v7M BLXNS:
6620 * - bit 0 of the destination address is the target security state
6623 /* At this point regs[15] is the address just after the BLXNS */
6624 uint32_t nextinst
= env
->regs
[15] | 1;
6625 uint32_t sp
= env
->regs
[13] - 8;
6628 /* translate.c will have made BLXNS UNDEF unless we're secure */
6629 assert(env
->v7m
.secure
);
6632 /* target is Secure, so this is just a normal BLX,
6633 * except that the low bit doesn't indicate Thumb/not.
6635 env
->regs
[14] = nextinst
;
6637 env
->regs
[15] = dest
& ~1;
6641 /* Target is non-secure: first push a stack frame */
6642 if (!QEMU_IS_ALIGNED(sp
, 8)) {
6643 qemu_log_mask(LOG_GUEST_ERROR
,
6644 "BLXNS with misaligned SP is UNPREDICTABLE\n");
6647 saved_psr
= env
->v7m
.exception
;
6648 if (env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SFPA_MASK
) {
6649 saved_psr
|= XPSR_SFPA
;
6652 /* Note that these stores can throw exceptions on MPU faults */
6653 cpu_stl_data(env
, sp
, nextinst
);
6654 cpu_stl_data(env
, sp
+ 4, saved_psr
);
6657 env
->regs
[14] = 0xfeffffff;
6658 if (arm_v7m_is_handler_mode(env
)) {
6659 /* Write a dummy value to IPSR, to avoid leaking the current secure
6660 * exception number to non-secure code. This is guaranteed not
6661 * to cause write_v7m_exception() to actually change stacks.
6663 write_v7m_exception(env
, 1);
6665 switch_v7m_security_state(env
, 0);
6667 env
->regs
[15] = dest
;
6670 static uint32_t *get_v7m_sp_ptr(CPUARMState
*env
, bool secure
, bool threadmode
,
6673 /* Return a pointer to the location where we currently store the
6674 * stack pointer for the requested security state and thread mode.
6675 * This pointer will become invalid if the CPU state is updated
6676 * such that the stack pointers are switched around (eg changing
6677 * the SPSEL control bit).
6678 * Compare the v8M ARM ARM pseudocode LookUpSP_with_security_mode().
6679 * Unlike that pseudocode, we require the caller to pass us in the
6680 * SPSEL control bit value; this is because we also use this
6681 * function in handling of pushing of the callee-saves registers
6682 * part of the v8M stack frame (pseudocode PushCalleeStack()),
6683 * and in the tailchain codepath the SPSEL bit comes from the exception
6684 * return magic LR value from the previous exception. The pseudocode
6685 * opencodes the stack-selection in PushCalleeStack(), but we prefer
6686 * to make this utility function generic enough to do the job.
6688 bool want_psp
= threadmode
&& spsel
;
6690 if (secure
== env
->v7m
.secure
) {
6691 if (want_psp
== v7m_using_psp(env
)) {
6692 return &env
->regs
[13];
6694 return &env
->v7m
.other_sp
;
6698 return &env
->v7m
.other_ss_psp
;
6700 return &env
->v7m
.other_ss_msp
;
6705 static bool arm_v7m_load_vector(ARMCPU
*cpu
, int exc
, bool targets_secure
,
6708 CPUState
*cs
= CPU(cpu
);
6709 CPUARMState
*env
= &cpu
->env
;
6711 uint32_t addr
= env
->v7m
.vecbase
[targets_secure
] + exc
* 4;
6712 uint32_t vector_entry
;
6713 MemTxAttrs attrs
= {};
6717 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, targets_secure
, true);
6719 /* We don't do a get_phys_addr() here because the rules for vector
6720 * loads are special: they always use the default memory map, and
6721 * the default memory map permits reads from all addresses.
6722 * Since there's no easy way to pass through to pmsav8_mpu_lookup()
6723 * that we want this special case which would always say "yes",
6724 * we just do the SAU lookup here followed by a direct physical load.
6726 attrs
.secure
= targets_secure
;
6729 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6730 V8M_SAttributes sattrs
= {};
6732 v8m_security_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &sattrs
);
6734 attrs
.secure
= false;
6735 } else if (!targets_secure
) {
6736 /* NS access to S memory */
6741 vector_entry
= address_space_ldl(arm_addressspace(cs
, attrs
), addr
,
6743 if (result
!= MEMTX_OK
) {
6746 *pvec
= vector_entry
;
6750 /* All vector table fetch fails are reported as HardFault, with
6751 * HFSR.VECTTBL and .FORCED set. (FORCED is set because
6752 * technically the underlying exception is a MemManage or BusFault
6753 * that is escalated to HardFault.) This is a terminal exception,
6754 * so we will either take the HardFault immediately or else enter
6755 * lockup (the latter case is handled in armv7m_nvic_set_pending_derived()).
6757 exc_secure
= targets_secure
||
6758 !(cpu
->env
.v7m
.aircr
& R_V7M_AIRCR_BFHFNMINS_MASK
);
6759 env
->v7m
.hfsr
|= R_V7M_HFSR_VECTTBL_MASK
| R_V7M_HFSR_FORCED_MASK
;
6760 armv7m_nvic_set_pending_derived(env
->nvic
, ARMV7M_EXCP_HARD
, exc_secure
);
6764 static bool v7m_push_callee_stack(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
,
6767 /* For v8M, push the callee-saves register part of the stack frame.
6768 * Compare the v8M pseudocode PushCalleeStack().
6769 * In the tailchaining case this may not be the current stack.
6771 CPUARMState
*env
= &cpu
->env
;
6772 uint32_t *frame_sp_p
;
6778 bool mode
= lr
& R_V7M_EXCRET_MODE_MASK
;
6779 bool priv
= !(env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_NPRIV_MASK
) ||
6782 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, M_REG_S
, priv
);
6783 frame_sp_p
= get_v7m_sp_ptr(env
, M_REG_S
, mode
,
6784 lr
& R_V7M_EXCRET_SPSEL_MASK
);
6786 mmu_idx
= core_to_arm_mmu_idx(env
, cpu_mmu_index(env
, false));
6787 frame_sp_p
= &env
->regs
[13];
6790 frameptr
= *frame_sp_p
- 0x28;
6792 /* Write as much of the stack frame as we can. A write failure may
6793 * cause us to pend a derived exception.
6796 v7m_stack_write(cpu
, frameptr
, 0xfefa125b, mmu_idx
, ignore_faults
) &&
6797 v7m_stack_write(cpu
, frameptr
+ 0x8, env
->regs
[4], mmu_idx
,
6799 v7m_stack_write(cpu
, frameptr
+ 0xc, env
->regs
[5], mmu_idx
,
6801 v7m_stack_write(cpu
, frameptr
+ 0x10, env
->regs
[6], mmu_idx
,
6803 v7m_stack_write(cpu
, frameptr
+ 0x14, env
->regs
[7], mmu_idx
,
6805 v7m_stack_write(cpu
, frameptr
+ 0x18, env
->regs
[8], mmu_idx
,
6807 v7m_stack_write(cpu
, frameptr
+ 0x1c, env
->regs
[9], mmu_idx
,
6809 v7m_stack_write(cpu
, frameptr
+ 0x20, env
->regs
[10], mmu_idx
,
6811 v7m_stack_write(cpu
, frameptr
+ 0x24, env
->regs
[11], mmu_idx
,
6814 /* Update SP regardless of whether any of the stack accesses failed.
6815 * When we implement v8M stack limit checking then this attempt to
6816 * update SP might also fail and result in a derived exception.
6818 *frame_sp_p
= frameptr
;
6823 static void v7m_exception_taken(ARMCPU
*cpu
, uint32_t lr
, bool dotailchain
,
6824 bool ignore_stackfaults
)
6826 /* Do the "take the exception" parts of exception entry,
6827 * but not the pushing of state to the stack. This is
6828 * similar to the pseudocode ExceptionTaken() function.
6830 CPUARMState
*env
= &cpu
->env
;
6832 bool targets_secure
;
6834 bool push_failed
= false;
6836 armv7m_nvic_get_pending_irq_info(env
->nvic
, &exc
, &targets_secure
);
6838 if (arm_feature(env
, ARM_FEATURE_V8
)) {
6839 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
6840 (lr
& R_V7M_EXCRET_S_MASK
)) {
6841 /* The background code (the owner of the registers in the
6842 * exception frame) is Secure. This means it may either already
6843 * have or now needs to push callee-saves registers.
6845 if (targets_secure
) {
6846 if (dotailchain
&& !(lr
& R_V7M_EXCRET_ES_MASK
)) {
6847 /* We took an exception from Secure to NonSecure
6848 * (which means the callee-saved registers got stacked)
6849 * and are now tailchaining to a Secure exception.
6850 * Clear DCRS so eventual return from this Secure
6851 * exception unstacks the callee-saved registers.
6853 lr
&= ~R_V7M_EXCRET_DCRS_MASK
;
6856 /* We're going to a non-secure exception; push the
6857 * callee-saves registers to the stack now, if they're
6858 * not already saved.
6860 if (lr
& R_V7M_EXCRET_DCRS_MASK
&&
6861 !(dotailchain
&& (lr
& R_V7M_EXCRET_ES_MASK
))) {
6862 push_failed
= v7m_push_callee_stack(cpu
, lr
, dotailchain
,
6863 ignore_stackfaults
);
6865 lr
|= R_V7M_EXCRET_DCRS_MASK
;
6869 lr
&= ~R_V7M_EXCRET_ES_MASK
;
6870 if (targets_secure
|| !arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6871 lr
|= R_V7M_EXCRET_ES_MASK
;
6873 lr
&= ~R_V7M_EXCRET_SPSEL_MASK
;
6874 if (env
->v7m
.control
[targets_secure
] & R_V7M_CONTROL_SPSEL_MASK
) {
6875 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
6878 /* Clear registers if necessary to prevent non-secure exception
6879 * code being able to see register values from secure code.
6880 * Where register values become architecturally UNKNOWN we leave
6881 * them with their previous values.
6883 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
6884 if (!targets_secure
) {
6885 /* Always clear the caller-saved registers (they have been
6886 * pushed to the stack earlier in v7m_push_stack()).
6887 * Clear callee-saved registers if the background code is
6888 * Secure (in which case these regs were saved in
6889 * v7m_push_callee_stack()).
6893 for (i
= 0; i
< 13; i
++) {
6894 /* r4..r11 are callee-saves, zero only if EXCRET.S == 1 */
6895 if (i
< 4 || i
> 11 || (lr
& R_V7M_EXCRET_S_MASK
)) {
6900 xpsr_write(env
, 0, XPSR_NZCV
| XPSR_Q
| XPSR_GE
| XPSR_IT
);
6905 if (push_failed
&& !ignore_stackfaults
) {
6906 /* Derived exception on callee-saves register stacking:
6907 * we might now want to take a different exception which
6908 * targets a different security state, so try again from the top.
6910 v7m_exception_taken(cpu
, lr
, true, true);
6914 if (!arm_v7m_load_vector(cpu
, exc
, targets_secure
, &addr
)) {
6915 /* Vector load failed: derived exception */
6916 v7m_exception_taken(cpu
, lr
, true, true);
6920 /* Now we've done everything that might cause a derived exception
6921 * we can go ahead and activate whichever exception we're going to
6922 * take (which might now be the derived exception).
6924 armv7m_nvic_acknowledge_irq(env
->nvic
);
6926 /* Switch to target security state -- must do this before writing SPSEL */
6927 switch_v7m_security_state(env
, targets_secure
);
6928 write_v7m_control_spsel(env
, 0);
6929 arm_clear_exclusive(env
);
6931 env
->condexec_bits
= 0;
6933 env
->regs
[15] = addr
& 0xfffffffe;
6934 env
->thumb
= addr
& 1;
6937 static bool v7m_push_stack(ARMCPU
*cpu
)
6939 /* Do the "set up stack frame" part of exception entry,
6940 * similar to pseudocode PushStack().
6941 * Return true if we generate a derived exception (and so
6942 * should ignore further stack faults trying to process
6943 * that derived exception.)
6946 CPUARMState
*env
= &cpu
->env
;
6947 uint32_t xpsr
= xpsr_read(env
);
6948 uint32_t frameptr
= env
->regs
[13];
6949 ARMMMUIdx mmu_idx
= core_to_arm_mmu_idx(env
, cpu_mmu_index(env
, false));
6951 /* Align stack pointer if the guest wants that */
6952 if ((frameptr
& 4) &&
6953 (env
->v7m
.ccr
[env
->v7m
.secure
] & R_V7M_CCR_STKALIGN_MASK
)) {
6955 xpsr
|= XPSR_SPREALIGN
;
6960 /* Write as much of the stack frame as we can. If we fail a stack
6961 * write this will result in a derived exception being pended
6962 * (which may be taken in preference to the one we started with
6963 * if it has higher priority).
6966 v7m_stack_write(cpu
, frameptr
, env
->regs
[0], mmu_idx
, false) &&
6967 v7m_stack_write(cpu
, frameptr
+ 4, env
->regs
[1], mmu_idx
, false) &&
6968 v7m_stack_write(cpu
, frameptr
+ 8, env
->regs
[2], mmu_idx
, false) &&
6969 v7m_stack_write(cpu
, frameptr
+ 12, env
->regs
[3], mmu_idx
, false) &&
6970 v7m_stack_write(cpu
, frameptr
+ 16, env
->regs
[12], mmu_idx
, false) &&
6971 v7m_stack_write(cpu
, frameptr
+ 20, env
->regs
[14], mmu_idx
, false) &&
6972 v7m_stack_write(cpu
, frameptr
+ 24, env
->regs
[15], mmu_idx
, false) &&
6973 v7m_stack_write(cpu
, frameptr
+ 28, xpsr
, mmu_idx
, false);
6975 /* Update SP regardless of whether any of the stack accesses failed.
6976 * When we implement v8M stack limit checking then this attempt to
6977 * update SP might also fail and result in a derived exception.
6979 env
->regs
[13] = frameptr
;
6984 static void do_v7m_exception_exit(ARMCPU
*cpu
)
6986 CPUARMState
*env
= &cpu
->env
;
6989 bool ufault
= false;
6990 bool sfault
= false;
6991 bool return_to_sp_process
;
6992 bool return_to_handler
;
6993 bool rettobase
= false;
6994 bool exc_secure
= false;
6995 bool return_to_secure
;
6997 /* If we're not in Handler mode then jumps to magic exception-exit
6998 * addresses don't have magic behaviour. However for the v8M
6999 * security extensions the magic secure-function-return has to
7000 * work in thread mode too, so to avoid doing an extra check in
7001 * the generated code we allow exception-exit magic to also cause the
7002 * internal exception and bring us here in thread mode. Correct code
7003 * will never try to do this (the following insn fetch will always
7004 * fault) so we the overhead of having taken an unnecessary exception
7007 if (!arm_v7m_is_handler_mode(env
)) {
7011 /* In the spec pseudocode ExceptionReturn() is called directly
7012 * from BXWritePC() and gets the full target PC value including
7013 * bit zero. In QEMU's implementation we treat it as a normal
7014 * jump-to-register (which is then caught later on), and so split
7015 * the target value up between env->regs[15] and env->thumb in
7016 * gen_bx(). Reconstitute it.
7018 excret
= env
->regs
[15];
7023 qemu_log_mask(CPU_LOG_INT
, "Exception return: magic PC %" PRIx32
7024 " previous exception %d\n",
7025 excret
, env
->v7m
.exception
);
7027 if ((excret
& R_V7M_EXCRET_RES1_MASK
) != R_V7M_EXCRET_RES1_MASK
) {
7028 qemu_log_mask(LOG_GUEST_ERROR
, "M profile: zero high bits in exception "
7029 "exit PC value 0x%" PRIx32
" are UNPREDICTABLE\n",
7033 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
7034 /* EXC_RETURN.ES validation check (R_SMFL). We must do this before
7035 * we pick which FAULTMASK to clear.
7037 if (!env
->v7m
.secure
&&
7038 ((excret
& R_V7M_EXCRET_ES_MASK
) ||
7039 !(excret
& R_V7M_EXCRET_DCRS_MASK
))) {
7041 /* For all other purposes, treat ES as 0 (R_HXSR) */
7042 excret
&= ~R_V7M_EXCRET_ES_MASK
;
7046 if (env
->v7m
.exception
!= ARMV7M_EXCP_NMI
) {
7047 /* Auto-clear FAULTMASK on return from other than NMI.
7048 * If the security extension is implemented then this only
7049 * happens if the raw execution priority is >= 0; the
7050 * value of the ES bit in the exception return value indicates
7051 * which security state's faultmask to clear. (v8M ARM ARM R_KBNF.)
7053 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
7054 exc_secure
= excret
& R_V7M_EXCRET_ES_MASK
;
7055 if (armv7m_nvic_raw_execution_priority(env
->nvic
) >= 0) {
7056 env
->v7m
.faultmask
[exc_secure
] = 0;
7059 env
->v7m
.faultmask
[M_REG_NS
] = 0;
7063 switch (armv7m_nvic_complete_irq(env
->nvic
, env
->v7m
.exception
,
7066 /* attempt to exit an exception that isn't active */
7070 /* still an irq active now */
7073 /* we returned to base exception level, no nesting.
7074 * (In the pseudocode this is written using "NestedActivation != 1"
7075 * where we have 'rettobase == false'.)
7080 g_assert_not_reached();
7083 return_to_handler
= !(excret
& R_V7M_EXCRET_MODE_MASK
);
7084 return_to_sp_process
= excret
& R_V7M_EXCRET_SPSEL_MASK
;
7085 return_to_secure
= arm_feature(env
, ARM_FEATURE_M_SECURITY
) &&
7086 (excret
& R_V7M_EXCRET_S_MASK
);
7088 if (arm_feature(env
, ARM_FEATURE_V8
)) {
7089 if (!arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
7090 /* UNPREDICTABLE if S == 1 or DCRS == 0 or ES == 1 (R_XLCP);
7091 * we choose to take the UsageFault.
7093 if ((excret
& R_V7M_EXCRET_S_MASK
) ||
7094 (excret
& R_V7M_EXCRET_ES_MASK
) ||
7095 !(excret
& R_V7M_EXCRET_DCRS_MASK
)) {
7099 if (excret
& R_V7M_EXCRET_RES0_MASK
) {
7103 /* For v7M we only recognize certain combinations of the low bits */
7104 switch (excret
& 0xf) {
7105 case 1: /* Return to Handler */
7107 case 13: /* Return to Thread using Process stack */
7108 case 9: /* Return to Thread using Main stack */
7109 /* We only need to check NONBASETHRDENA for v7M, because in
7110 * v8M this bit does not exist (it is RES1).
7113 !(env
->v7m
.ccr
[env
->v7m
.secure
] &
7114 R_V7M_CCR_NONBASETHRDENA_MASK
)) {
7124 env
->v7m
.sfsr
|= R_V7M_SFSR_INVER_MASK
;
7125 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7126 v7m_exception_taken(cpu
, excret
, true, false);
7127 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
7128 "stackframe: failed EXC_RETURN.ES validity check\n");
7133 /* Bad exception return: instead of popping the exception
7134 * stack, directly take a usage fault on the current stack.
7136 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
7137 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7138 v7m_exception_taken(cpu
, excret
, true, false);
7139 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
7140 "stackframe: failed exception return integrity check\n");
7144 /* Set CONTROL.SPSEL from excret.SPSEL. Since we're still in
7145 * Handler mode (and will be until we write the new XPSR.Interrupt
7146 * field) this does not switch around the current stack pointer.
7148 write_v7m_control_spsel_for_secstate(env
, return_to_sp_process
, exc_secure
);
7150 switch_v7m_security_state(env
, return_to_secure
);
7153 /* The stack pointer we should be reading the exception frame from
7154 * depends on bits in the magic exception return type value (and
7155 * for v8M isn't necessarily the stack pointer we will eventually
7156 * end up resuming execution with). Get a pointer to the location
7157 * in the CPU state struct where the SP we need is currently being
7158 * stored; we will use and modify it in place.
7159 * We use this limited C variable scope so we don't accidentally
7160 * use 'frame_sp_p' after we do something that makes it invalid.
7162 uint32_t *frame_sp_p
= get_v7m_sp_ptr(env
,
7165 return_to_sp_process
);
7166 uint32_t frameptr
= *frame_sp_p
;
7169 bool return_to_priv
= return_to_handler
||
7170 !(env
->v7m
.control
[return_to_secure
] & R_V7M_CONTROL_NPRIV_MASK
);
7172 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, return_to_secure
,
7175 if (!QEMU_IS_ALIGNED(frameptr
, 8) &&
7176 arm_feature(env
, ARM_FEATURE_V8
)) {
7177 qemu_log_mask(LOG_GUEST_ERROR
,
7178 "M profile exception return with non-8-aligned SP "
7179 "for destination state is UNPREDICTABLE\n");
7182 /* Do we need to pop callee-saved registers? */
7183 if (return_to_secure
&&
7184 ((excret
& R_V7M_EXCRET_ES_MASK
) == 0 ||
7185 (excret
& R_V7M_EXCRET_DCRS_MASK
) == 0)) {
7186 uint32_t expected_sig
= 0xfefa125b;
7187 uint32_t actual_sig
;
7189 pop_ok
= v7m_stack_read(cpu
, &actual_sig
, frameptr
, mmu_idx
);
7191 if (pop_ok
&& expected_sig
!= actual_sig
) {
7192 /* Take a SecureFault on the current stack */
7193 env
->v7m
.sfsr
|= R_V7M_SFSR_INVIS_MASK
;
7194 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7195 v7m_exception_taken(cpu
, excret
, true, false);
7196 qemu_log_mask(CPU_LOG_INT
, "...taking SecureFault on existing "
7197 "stackframe: failed exception return integrity "
7198 "signature check\n");
7203 v7m_stack_read(cpu
, &env
->regs
[4], frameptr
+ 0x8, mmu_idx
) &&
7204 v7m_stack_read(cpu
, &env
->regs
[4], frameptr
+ 0x8, mmu_idx
) &&
7205 v7m_stack_read(cpu
, &env
->regs
[5], frameptr
+ 0xc, mmu_idx
) &&
7206 v7m_stack_read(cpu
, &env
->regs
[6], frameptr
+ 0x10, mmu_idx
) &&
7207 v7m_stack_read(cpu
, &env
->regs
[7], frameptr
+ 0x14, mmu_idx
) &&
7208 v7m_stack_read(cpu
, &env
->regs
[8], frameptr
+ 0x18, mmu_idx
) &&
7209 v7m_stack_read(cpu
, &env
->regs
[9], frameptr
+ 0x1c, mmu_idx
) &&
7210 v7m_stack_read(cpu
, &env
->regs
[10], frameptr
+ 0x20, mmu_idx
) &&
7211 v7m_stack_read(cpu
, &env
->regs
[11], frameptr
+ 0x24, mmu_idx
);
7218 v7m_stack_read(cpu
, &env
->regs
[0], frameptr
, mmu_idx
) &&
7219 v7m_stack_read(cpu
, &env
->regs
[1], frameptr
+ 0x4, mmu_idx
) &&
7220 v7m_stack_read(cpu
, &env
->regs
[2], frameptr
+ 0x8, mmu_idx
) &&
7221 v7m_stack_read(cpu
, &env
->regs
[3], frameptr
+ 0xc, mmu_idx
) &&
7222 v7m_stack_read(cpu
, &env
->regs
[12], frameptr
+ 0x10, mmu_idx
) &&
7223 v7m_stack_read(cpu
, &env
->regs
[14], frameptr
+ 0x14, mmu_idx
) &&
7224 v7m_stack_read(cpu
, &env
->regs
[15], frameptr
+ 0x18, mmu_idx
) &&
7225 v7m_stack_read(cpu
, &xpsr
, frameptr
+ 0x1c, mmu_idx
);
7228 /* v7m_stack_read() pended a fault, so take it (as a tail
7229 * chained exception on the same stack frame)
7231 v7m_exception_taken(cpu
, excret
, true, false);
7235 /* Returning from an exception with a PC with bit 0 set is defined
7236 * behaviour on v8M (bit 0 is ignored), but for v7M it was specified
7237 * to be UNPREDICTABLE. In practice actual v7M hardware seems to ignore
7238 * the lsbit, and there are several RTOSes out there which incorrectly
7239 * assume the r15 in the stack frame should be a Thumb-style "lsbit
7240 * indicates ARM/Thumb" value, so ignore the bit on v7M as well, but
7241 * complain about the badly behaved guest.
7243 if (env
->regs
[15] & 1) {
7244 env
->regs
[15] &= ~1U;
7245 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
7246 qemu_log_mask(LOG_GUEST_ERROR
,
7247 "M profile return from interrupt with misaligned "
7248 "PC is UNPREDICTABLE on v7M\n");
7252 if (arm_feature(env
, ARM_FEATURE_V8
)) {
7253 /* For v8M we have to check whether the xPSR exception field
7254 * matches the EXCRET value for return to handler/thread
7255 * before we commit to changing the SP and xPSR.
7257 bool will_be_handler
= (xpsr
& XPSR_EXCP
) != 0;
7258 if (return_to_handler
!= will_be_handler
) {
7259 /* Take an INVPC UsageFault on the current stack.
7260 * By this point we will have switched to the security state
7261 * for the background state, so this UsageFault will target
7264 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
7266 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
7267 v7m_exception_taken(cpu
, excret
, true, false);
7268 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on existing "
7269 "stackframe: failed exception return integrity "
7275 /* Commit to consuming the stack frame */
7277 /* Undo stack alignment (the SPREALIGN bit indicates that the original
7278 * pre-exception SP was not 8-aligned and we added a padding word to
7279 * align it, so we undo this by ORing in the bit that increases it
7280 * from the current 8-aligned value to the 8-unaligned value. (Adding 4
7281 * would work too but a logical OR is how the pseudocode specifies it.)
7283 if (xpsr
& XPSR_SPREALIGN
) {
7286 *frame_sp_p
= frameptr
;
7288 /* This xpsr_write() will invalidate frame_sp_p as it may switch stack */
7289 xpsr_write(env
, xpsr
, ~XPSR_SPREALIGN
);
7291 /* The restored xPSR exception field will be zero if we're
7292 * resuming in Thread mode. If that doesn't match what the
7293 * exception return excret specified then this is a UsageFault.
7294 * v7M requires we make this check here; v8M did it earlier.
7296 if (return_to_handler
!= arm_v7m_is_handler_mode(env
)) {
7297 /* Take an INVPC UsageFault by pushing the stack again;
7298 * we know we're v7M so this is never a Secure UsageFault.
7300 bool ignore_stackfaults
;
7302 assert(!arm_feature(env
, ARM_FEATURE_V8
));
7303 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, false);
7304 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
7305 ignore_stackfaults
= v7m_push_stack(cpu
);
7306 v7m_exception_taken(cpu
, excret
, false, ignore_stackfaults
);
7307 qemu_log_mask(CPU_LOG_INT
, "...taking UsageFault on new stackframe: "
7308 "failed exception return integrity check\n");
7312 /* Otherwise, we have a successful exception exit. */
7313 arm_clear_exclusive(env
);
7314 qemu_log_mask(CPU_LOG_INT
, "...successful exception return\n");
7317 static bool do_v7m_function_return(ARMCPU
*cpu
)
7319 /* v8M security extensions magic function return.
7321 * (1) throw an exception (longjump)
7322 * (2) return true if we successfully handled the function return
7323 * (3) return false if we failed a consistency check and have
7324 * pended a UsageFault that needs to be taken now
7326 * At this point the magic return value is split between env->regs[15]
7327 * and env->thumb. We don't bother to reconstitute it because we don't
7328 * need it (all values are handled the same way).
7330 CPUARMState
*env
= &cpu
->env
;
7331 uint32_t newpc
, newpsr
, newpsr_exc
;
7333 qemu_log_mask(CPU_LOG_INT
, "...really v7M secure function return\n");
7336 bool threadmode
, spsel
;
7339 uint32_t *frame_sp_p
;
7342 /* Pull the return address and IPSR from the Secure stack */
7343 threadmode
= !arm_v7m_is_handler_mode(env
);
7344 spsel
= env
->v7m
.control
[M_REG_S
] & R_V7M_CONTROL_SPSEL_MASK
;
7346 frame_sp_p
= get_v7m_sp_ptr(env
, true, threadmode
, spsel
);
7347 frameptr
= *frame_sp_p
;
7349 /* These loads may throw an exception (for MPU faults). We want to
7350 * do them as secure, so work out what MMU index that is.
7352 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
7353 oi
= make_memop_idx(MO_LE
, arm_to_core_mmu_idx(mmu_idx
));
7354 newpc
= helper_le_ldul_mmu(env
, frameptr
, oi
, 0);
7355 newpsr
= helper_le_ldul_mmu(env
, frameptr
+ 4, oi
, 0);
7357 /* Consistency checks on new IPSR */
7358 newpsr_exc
= newpsr
& XPSR_EXCP
;
7359 if (!((env
->v7m
.exception
== 0 && newpsr_exc
== 0) ||
7360 (env
->v7m
.exception
== 1 && newpsr_exc
!= 0))) {
7361 /* Pend the fault and tell our caller to take it */
7362 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVPC_MASK
;
7363 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
,
7365 qemu_log_mask(CPU_LOG_INT
,
7366 "...taking INVPC UsageFault: "
7367 "IPSR consistency check failed\n");
7371 *frame_sp_p
= frameptr
+ 8;
7374 /* This invalidates frame_sp_p */
7375 switch_v7m_security_state(env
, true);
7376 env
->v7m
.exception
= newpsr_exc
;
7377 env
->v7m
.control
[M_REG_S
] &= ~R_V7M_CONTROL_SFPA_MASK
;
7378 if (newpsr
& XPSR_SFPA
) {
7379 env
->v7m
.control
[M_REG_S
] |= R_V7M_CONTROL_SFPA_MASK
;
7381 xpsr_write(env
, 0, XPSR_IT
);
7382 env
->thumb
= newpc
& 1;
7383 env
->regs
[15] = newpc
& ~1;
7385 qemu_log_mask(CPU_LOG_INT
, "...function return successful\n");
7389 static void arm_log_exception(int idx
)
7391 if (qemu_loglevel_mask(CPU_LOG_INT
)) {
7392 const char *exc
= NULL
;
7393 static const char * const excnames
[] = {
7394 [EXCP_UDEF
] = "Undefined Instruction",
7396 [EXCP_PREFETCH_ABORT
] = "Prefetch Abort",
7397 [EXCP_DATA_ABORT
] = "Data Abort",
7400 [EXCP_BKPT
] = "Breakpoint",
7401 [EXCP_EXCEPTION_EXIT
] = "QEMU v7M exception exit",
7402 [EXCP_KERNEL_TRAP
] = "QEMU intercept of kernel commpage",
7403 [EXCP_HVC
] = "Hypervisor Call",
7404 [EXCP_HYP_TRAP
] = "Hypervisor Trap",
7405 [EXCP_SMC
] = "Secure Monitor Call",
7406 [EXCP_VIRQ
] = "Virtual IRQ",
7407 [EXCP_VFIQ
] = "Virtual FIQ",
7408 [EXCP_SEMIHOST
] = "Semihosting call",
7409 [EXCP_NOCP
] = "v7M NOCP UsageFault",
7410 [EXCP_INVSTATE
] = "v7M INVSTATE UsageFault",
7413 if (idx
>= 0 && idx
< ARRAY_SIZE(excnames
)) {
7414 exc
= excnames
[idx
];
7419 qemu_log_mask(CPU_LOG_INT
, "Taking exception %d [%s]\n", idx
, exc
);
7423 static bool v7m_read_half_insn(ARMCPU
*cpu
, ARMMMUIdx mmu_idx
,
7424 uint32_t addr
, uint16_t *insn
)
7426 /* Load a 16-bit portion of a v7M instruction, returning true on success,
7427 * or false on failure (in which case we will have pended the appropriate
7429 * We need to do the instruction fetch's MPU and SAU checks
7430 * like this because there is no MMU index that would allow
7431 * doing the load with a single function call. Instead we must
7432 * first check that the security attributes permit the load
7433 * and that they don't mismatch on the two halves of the instruction,
7434 * and then we do the load as a secure load (ie using the security
7435 * attributes of the address, not the CPU, as architecturally required).
7437 CPUState
*cs
= CPU(cpu
);
7438 CPUARMState
*env
= &cpu
->env
;
7439 V8M_SAttributes sattrs
= {};
7440 MemTxAttrs attrs
= {};
7441 ARMMMUFaultInfo fi
= {};
7443 target_ulong page_size
;
7447 v8m_security_lookup(env
, addr
, MMU_INST_FETCH
, mmu_idx
, &sattrs
);
7448 if (!sattrs
.nsc
|| sattrs
.ns
) {
7449 /* This must be the second half of the insn, and it straddles a
7450 * region boundary with the second half not being S&NSC.
7452 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
7453 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7454 qemu_log_mask(CPU_LOG_INT
,
7455 "...really SecureFault with SFSR.INVEP\n");
7458 if (get_phys_addr(env
, addr
, MMU_INST_FETCH
, mmu_idx
,
7459 &physaddr
, &attrs
, &prot
, &page_size
, &fi
, NULL
)) {
7460 /* the MPU lookup failed */
7461 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
7462 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
, env
->v7m
.secure
);
7463 qemu_log_mask(CPU_LOG_INT
, "...really MemManage with CFSR.IACCVIOL\n");
7466 *insn
= address_space_lduw_le(arm_addressspace(cs
, attrs
), physaddr
,
7468 if (txres
!= MEMTX_OK
) {
7469 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
7470 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
7471 qemu_log_mask(CPU_LOG_INT
, "...really BusFault with CFSR.IBUSERR\n");
7477 static bool v7m_handle_execute_nsc(ARMCPU
*cpu
)
7479 /* Check whether this attempt to execute code in a Secure & NS-Callable
7480 * memory region is for an SG instruction; if so, then emulate the
7481 * effect of the SG instruction and return true. Otherwise pend
7482 * the correct kind of exception and return false.
7484 CPUARMState
*env
= &cpu
->env
;
7488 /* We should never get here unless get_phys_addr_pmsav8() caused
7489 * an exception for NS executing in S&NSC memory.
7491 assert(!env
->v7m
.secure
);
7492 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
7494 /* We want to do the MPU lookup as secure; work out what mmu_idx that is */
7495 mmu_idx
= arm_v7m_mmu_idx_for_secstate(env
, true);
7497 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15], &insn
)) {
7505 if (insn
!= 0xe97f) {
7506 /* Not an SG instruction first half (we choose the IMPDEF
7507 * early-SG-check option).
7512 if (!v7m_read_half_insn(cpu
, mmu_idx
, env
->regs
[15] + 2, &insn
)) {
7516 if (insn
!= 0xe97f) {
7517 /* Not an SG instruction second half (yes, both halves of the SG
7518 * insn have the same hex value)
7523 /* OK, we have confirmed that we really have an SG instruction.
7524 * We know we're NS in S memory so don't need to repeat those checks.
7526 qemu_log_mask(CPU_LOG_INT
, "...really an SG instruction at 0x%08" PRIx32
7527 ", executing it\n", env
->regs
[15]);
7528 env
->regs
[14] &= ~1;
7529 switch_v7m_security_state(env
, true);
7530 xpsr_write(env
, 0, XPSR_IT
);
7535 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
7536 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7537 qemu_log_mask(CPU_LOG_INT
,
7538 "...really SecureFault with SFSR.INVEP\n");
7542 void arm_v7m_cpu_do_interrupt(CPUState
*cs
)
7544 ARMCPU
*cpu
= ARM_CPU(cs
);
7545 CPUARMState
*env
= &cpu
->env
;
7547 bool ignore_stackfaults
;
7549 arm_log_exception(cs
->exception_index
);
7551 /* For exceptions we just mark as pending on the NVIC, and let that
7553 switch (cs
->exception_index
) {
7555 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7556 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_UNDEFINSTR_MASK
;
7559 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7560 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_NOCP_MASK
;
7563 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_USAGE
, env
->v7m
.secure
);
7564 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_INVSTATE_MASK
;
7567 /* The PC already points to the next instruction. */
7568 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SVC
, env
->v7m
.secure
);
7570 case EXCP_PREFETCH_ABORT
:
7571 case EXCP_DATA_ABORT
:
7572 /* Note that for M profile we don't have a guest facing FSR, but
7573 * the env->exception.fsr will be populated by the code that
7574 * raises the fault, in the A profile short-descriptor format.
7576 switch (env
->exception
.fsr
& 0xf) {
7577 case M_FAKE_FSR_NSC_EXEC
:
7578 /* Exception generated when we try to execute code at an address
7579 * which is marked as Secure & Non-Secure Callable and the CPU
7580 * is in the Non-Secure state. The only instruction which can
7581 * be executed like this is SG (and that only if both halves of
7582 * the SG instruction have the same security attributes.)
7583 * Everything else must generate an INVEP SecureFault, so we
7584 * emulate the SG instruction here.
7586 if (v7m_handle_execute_nsc(cpu
)) {
7590 case M_FAKE_FSR_SFAULT
:
7591 /* Various flavours of SecureFault for attempts to execute or
7592 * access data in the wrong security state.
7594 switch (cs
->exception_index
) {
7595 case EXCP_PREFETCH_ABORT
:
7596 if (env
->v7m
.secure
) {
7597 env
->v7m
.sfsr
|= R_V7M_SFSR_INVTRAN_MASK
;
7598 qemu_log_mask(CPU_LOG_INT
,
7599 "...really SecureFault with SFSR.INVTRAN\n");
7601 env
->v7m
.sfsr
|= R_V7M_SFSR_INVEP_MASK
;
7602 qemu_log_mask(CPU_LOG_INT
,
7603 "...really SecureFault with SFSR.INVEP\n");
7606 case EXCP_DATA_ABORT
:
7607 /* This must be an NS access to S memory */
7608 env
->v7m
.sfsr
|= R_V7M_SFSR_AUVIOL_MASK
;
7609 qemu_log_mask(CPU_LOG_INT
,
7610 "...really SecureFault with SFSR.AUVIOL\n");
7613 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_SECURE
, false);
7615 case 0x8: /* External Abort */
7616 switch (cs
->exception_index
) {
7617 case EXCP_PREFETCH_ABORT
:
7618 env
->v7m
.cfsr
[M_REG_NS
] |= R_V7M_CFSR_IBUSERR_MASK
;
7619 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IBUSERR\n");
7621 case EXCP_DATA_ABORT
:
7622 env
->v7m
.cfsr
[M_REG_NS
] |=
7623 (R_V7M_CFSR_PRECISERR_MASK
| R_V7M_CFSR_BFARVALID_MASK
);
7624 env
->v7m
.bfar
= env
->exception
.vaddress
;
7625 qemu_log_mask(CPU_LOG_INT
,
7626 "...with CFSR.PRECISERR and BFAR 0x%x\n",
7630 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_BUS
, false);
7633 /* All other FSR values are either MPU faults or "can't happen
7634 * for M profile" cases.
7636 switch (cs
->exception_index
) {
7637 case EXCP_PREFETCH_ABORT
:
7638 env
->v7m
.cfsr
[env
->v7m
.secure
] |= R_V7M_CFSR_IACCVIOL_MASK
;
7639 qemu_log_mask(CPU_LOG_INT
, "...with CFSR.IACCVIOL\n");
7641 case EXCP_DATA_ABORT
:
7642 env
->v7m
.cfsr
[env
->v7m
.secure
] |=
7643 (R_V7M_CFSR_DACCVIOL_MASK
| R_V7M_CFSR_MMARVALID_MASK
);
7644 env
->v7m
.mmfar
[env
->v7m
.secure
] = env
->exception
.vaddress
;
7645 qemu_log_mask(CPU_LOG_INT
,
7646 "...with CFSR.DACCVIOL and MMFAR 0x%x\n",
7647 env
->v7m
.mmfar
[env
->v7m
.secure
]);
7650 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_MEM
,
7656 if (semihosting_enabled()) {
7658 nr
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
)) & 0xff;
7661 qemu_log_mask(CPU_LOG_INT
,
7662 "...handling as semihosting call 0x%x\n",
7664 env
->regs
[0] = do_arm_semihosting(env
);
7668 armv7m_nvic_set_pending(env
->nvic
, ARMV7M_EXCP_DEBUG
, false);
7672 case EXCP_EXCEPTION_EXIT
:
7673 if (env
->regs
[15] < EXC_RETURN_MIN_MAGIC
) {
7674 /* Must be v8M security extension function return */
7675 assert(env
->regs
[15] >= FNC_RETURN_MIN_MAGIC
);
7676 assert(arm_feature(env
, ARM_FEATURE_M_SECURITY
));
7677 if (do_v7m_function_return(cpu
)) {
7681 do_v7m_exception_exit(cpu
);
7686 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
7687 return; /* Never happens. Keep compiler happy. */
7690 if (arm_feature(env
, ARM_FEATURE_V8
)) {
7691 lr
= R_V7M_EXCRET_RES1_MASK
|
7692 R_V7M_EXCRET_DCRS_MASK
|
7693 R_V7M_EXCRET_FTYPE_MASK
;
7694 /* The S bit indicates whether we should return to Secure
7695 * or NonSecure (ie our current state).
7696 * The ES bit indicates whether we're taking this exception
7697 * to Secure or NonSecure (ie our target state). We set it
7698 * later, in v7m_exception_taken().
7699 * The SPSEL bit is also set in v7m_exception_taken() for v8M.
7700 * This corresponds to the ARM ARM pseudocode for v8M setting
7701 * some LR bits in PushStack() and some in ExceptionTaken();
7702 * the distinction matters for the tailchain cases where we
7703 * can take an exception without pushing the stack.
7705 if (env
->v7m
.secure
) {
7706 lr
|= R_V7M_EXCRET_S_MASK
;
7709 lr
= R_V7M_EXCRET_RES1_MASK
|
7710 R_V7M_EXCRET_S_MASK
|
7711 R_V7M_EXCRET_DCRS_MASK
|
7712 R_V7M_EXCRET_FTYPE_MASK
|
7713 R_V7M_EXCRET_ES_MASK
;
7714 if (env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
) {
7715 lr
|= R_V7M_EXCRET_SPSEL_MASK
;
7718 if (!arm_v7m_is_handler_mode(env
)) {
7719 lr
|= R_V7M_EXCRET_MODE_MASK
;
7722 ignore_stackfaults
= v7m_push_stack(cpu
);
7723 v7m_exception_taken(cpu
, lr
, false, ignore_stackfaults
);
7724 qemu_log_mask(CPU_LOG_INT
, "... as %d\n", env
->v7m
.exception
);
7727 /* Function used to synchronize QEMU's AArch64 register set with AArch32
7728 * register set. This is necessary when switching between AArch32 and AArch64
7731 void aarch64_sync_32_to_64(CPUARMState
*env
)
7734 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
7736 /* We can blanket copy R[0:7] to X[0:7] */
7737 for (i
= 0; i
< 8; i
++) {
7738 env
->xregs
[i
] = env
->regs
[i
];
7741 /* Unless we are in FIQ mode, x8-x12 come from the user registers r8-r12.
7742 * Otherwise, they come from the banked user regs.
7744 if (mode
== ARM_CPU_MODE_FIQ
) {
7745 for (i
= 8; i
< 13; i
++) {
7746 env
->xregs
[i
] = env
->usr_regs
[i
- 8];
7749 for (i
= 8; i
< 13; i
++) {
7750 env
->xregs
[i
] = env
->regs
[i
];
7754 /* Registers x13-x23 are the various mode SP and FP registers. Registers
7755 * r13 and r14 are only copied if we are in that mode, otherwise we copy
7756 * from the mode banked register.
7758 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
7759 env
->xregs
[13] = env
->regs
[13];
7760 env
->xregs
[14] = env
->regs
[14];
7762 env
->xregs
[13] = env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)];
7763 /* HYP is an exception in that it is copied from r14 */
7764 if (mode
== ARM_CPU_MODE_HYP
) {
7765 env
->xregs
[14] = env
->regs
[14];
7767 env
->xregs
[14] = env
->banked_r14
[bank_number(ARM_CPU_MODE_USR
)];
7771 if (mode
== ARM_CPU_MODE_HYP
) {
7772 env
->xregs
[15] = env
->regs
[13];
7774 env
->xregs
[15] = env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)];
7777 if (mode
== ARM_CPU_MODE_IRQ
) {
7778 env
->xregs
[16] = env
->regs
[14];
7779 env
->xregs
[17] = env
->regs
[13];
7781 env
->xregs
[16] = env
->banked_r14
[bank_number(ARM_CPU_MODE_IRQ
)];
7782 env
->xregs
[17] = env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)];
7785 if (mode
== ARM_CPU_MODE_SVC
) {
7786 env
->xregs
[18] = env
->regs
[14];
7787 env
->xregs
[19] = env
->regs
[13];
7789 env
->xregs
[18] = env
->banked_r14
[bank_number(ARM_CPU_MODE_SVC
)];
7790 env
->xregs
[19] = env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)];
7793 if (mode
== ARM_CPU_MODE_ABT
) {
7794 env
->xregs
[20] = env
->regs
[14];
7795 env
->xregs
[21] = env
->regs
[13];
7797 env
->xregs
[20] = env
->banked_r14
[bank_number(ARM_CPU_MODE_ABT
)];
7798 env
->xregs
[21] = env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)];
7801 if (mode
== ARM_CPU_MODE_UND
) {
7802 env
->xregs
[22] = env
->regs
[14];
7803 env
->xregs
[23] = env
->regs
[13];
7805 env
->xregs
[22] = env
->banked_r14
[bank_number(ARM_CPU_MODE_UND
)];
7806 env
->xregs
[23] = env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)];
7809 /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
7810 * mode, then we can copy from r8-r14. Otherwise, we copy from the
7811 * FIQ bank for r8-r14.
7813 if (mode
== ARM_CPU_MODE_FIQ
) {
7814 for (i
= 24; i
< 31; i
++) {
7815 env
->xregs
[i
] = env
->regs
[i
- 16]; /* X[24:30] <- R[8:14] */
7818 for (i
= 24; i
< 29; i
++) {
7819 env
->xregs
[i
] = env
->fiq_regs
[i
- 24];
7821 env
->xregs
[29] = env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)];
7822 env
->xregs
[30] = env
->banked_r14
[bank_number(ARM_CPU_MODE_FIQ
)];
7825 env
->pc
= env
->regs
[15];
7828 /* Function used to synchronize QEMU's AArch32 register set with AArch64
7829 * register set. This is necessary when switching between AArch32 and AArch64
7832 void aarch64_sync_64_to_32(CPUARMState
*env
)
7835 uint32_t mode
= env
->uncached_cpsr
& CPSR_M
;
7837 /* We can blanket copy X[0:7] to R[0:7] */
7838 for (i
= 0; i
< 8; i
++) {
7839 env
->regs
[i
] = env
->xregs
[i
];
7842 /* Unless we are in FIQ mode, r8-r12 come from the user registers x8-x12.
7843 * Otherwise, we copy x8-x12 into the banked user regs.
7845 if (mode
== ARM_CPU_MODE_FIQ
) {
7846 for (i
= 8; i
< 13; i
++) {
7847 env
->usr_regs
[i
- 8] = env
->xregs
[i
];
7850 for (i
= 8; i
< 13; i
++) {
7851 env
->regs
[i
] = env
->xregs
[i
];
7855 /* Registers r13 & r14 depend on the current mode.
7856 * If we are in a given mode, we copy the corresponding x registers to r13
7857 * and r14. Otherwise, we copy the x register to the banked r13 and r14
7860 if (mode
== ARM_CPU_MODE_USR
|| mode
== ARM_CPU_MODE_SYS
) {
7861 env
->regs
[13] = env
->xregs
[13];
7862 env
->regs
[14] = env
->xregs
[14];
7864 env
->banked_r13
[bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[13];
7866 /* HYP is an exception in that it does not have its own banked r14 but
7867 * shares the USR r14
7869 if (mode
== ARM_CPU_MODE_HYP
) {
7870 env
->regs
[14] = env
->xregs
[14];
7872 env
->banked_r14
[bank_number(ARM_CPU_MODE_USR
)] = env
->xregs
[14];
7876 if (mode
== ARM_CPU_MODE_HYP
) {
7877 env
->regs
[13] = env
->xregs
[15];
7879 env
->banked_r13
[bank_number(ARM_CPU_MODE_HYP
)] = env
->xregs
[15];
7882 if (mode
== ARM_CPU_MODE_IRQ
) {
7883 env
->regs
[14] = env
->xregs
[16];
7884 env
->regs
[13] = env
->xregs
[17];
7886 env
->banked_r14
[bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[16];
7887 env
->banked_r13
[bank_number(ARM_CPU_MODE_IRQ
)] = env
->xregs
[17];
7890 if (mode
== ARM_CPU_MODE_SVC
) {
7891 env
->regs
[14] = env
->xregs
[18];
7892 env
->regs
[13] = env
->xregs
[19];
7894 env
->banked_r14
[bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[18];
7895 env
->banked_r13
[bank_number(ARM_CPU_MODE_SVC
)] = env
->xregs
[19];
7898 if (mode
== ARM_CPU_MODE_ABT
) {
7899 env
->regs
[14] = env
->xregs
[20];
7900 env
->regs
[13] = env
->xregs
[21];
7902 env
->banked_r14
[bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[20];
7903 env
->banked_r13
[bank_number(ARM_CPU_MODE_ABT
)] = env
->xregs
[21];
7906 if (mode
== ARM_CPU_MODE_UND
) {
7907 env
->regs
[14] = env
->xregs
[22];
7908 env
->regs
[13] = env
->xregs
[23];
7910 env
->banked_r14
[bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[22];
7911 env
->banked_r13
[bank_number(ARM_CPU_MODE_UND
)] = env
->xregs
[23];
7914 /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ
7915 * mode, then we can copy to r8-r14. Otherwise, we copy to the
7916 * FIQ bank for r8-r14.
7918 if (mode
== ARM_CPU_MODE_FIQ
) {
7919 for (i
= 24; i
< 31; i
++) {
7920 env
->regs
[i
- 16] = env
->xregs
[i
]; /* X[24:30] -> R[8:14] */
7923 for (i
= 24; i
< 29; i
++) {
7924 env
->fiq_regs
[i
- 24] = env
->xregs
[i
];
7926 env
->banked_r13
[bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[29];
7927 env
->banked_r14
[bank_number(ARM_CPU_MODE_FIQ
)] = env
->xregs
[30];
7930 env
->regs
[15] = env
->pc
;
7933 static void arm_cpu_do_interrupt_aarch32(CPUState
*cs
)
7935 ARMCPU
*cpu
= ARM_CPU(cs
);
7936 CPUARMState
*env
= &cpu
->env
;
7943 /* If this is a debug exception we must update the DBGDSCR.MOE bits */
7944 switch (env
->exception
.syndrome
>> ARM_EL_EC_SHIFT
) {
7946 case EC_BREAKPOINT_SAME_EL
:
7950 case EC_WATCHPOINT_SAME_EL
:
7956 case EC_VECTORCATCH
:
7965 env
->cp15
.mdscr_el1
= deposit64(env
->cp15
.mdscr_el1
, 2, 4, moe
);
7968 /* TODO: Vectored interrupt controller. */
7969 switch (cs
->exception_index
) {
7971 new_mode
= ARM_CPU_MODE_UND
;
7980 new_mode
= ARM_CPU_MODE_SVC
;
7983 /* The PC already points to the next instruction. */
7987 /* Fall through to prefetch abort. */
7988 case EXCP_PREFETCH_ABORT
:
7989 A32_BANKED_CURRENT_REG_SET(env
, ifsr
, env
->exception
.fsr
);
7990 A32_BANKED_CURRENT_REG_SET(env
, ifar
, env
->exception
.vaddress
);
7991 qemu_log_mask(CPU_LOG_INT
, "...with IFSR 0x%x IFAR 0x%x\n",
7992 env
->exception
.fsr
, (uint32_t)env
->exception
.vaddress
);
7993 new_mode
= ARM_CPU_MODE_ABT
;
7995 mask
= CPSR_A
| CPSR_I
;
7998 case EXCP_DATA_ABORT
:
7999 A32_BANKED_CURRENT_REG_SET(env
, dfsr
, env
->exception
.fsr
);
8000 A32_BANKED_CURRENT_REG_SET(env
, dfar
, env
->exception
.vaddress
);
8001 qemu_log_mask(CPU_LOG_INT
, "...with DFSR 0x%x DFAR 0x%x\n",
8003 (uint32_t)env
->exception
.vaddress
);
8004 new_mode
= ARM_CPU_MODE_ABT
;
8006 mask
= CPSR_A
| CPSR_I
;
8010 new_mode
= ARM_CPU_MODE_IRQ
;
8012 /* Disable IRQ and imprecise data aborts. */
8013 mask
= CPSR_A
| CPSR_I
;
8015 if (env
->cp15
.scr_el3
& SCR_IRQ
) {
8016 /* IRQ routed to monitor mode */
8017 new_mode
= ARM_CPU_MODE_MON
;
8022 new_mode
= ARM_CPU_MODE_FIQ
;
8024 /* Disable FIQ, IRQ and imprecise data aborts. */
8025 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
8026 if (env
->cp15
.scr_el3
& SCR_FIQ
) {
8027 /* FIQ routed to monitor mode */
8028 new_mode
= ARM_CPU_MODE_MON
;
8033 new_mode
= ARM_CPU_MODE_IRQ
;
8035 /* Disable IRQ and imprecise data aborts. */
8036 mask
= CPSR_A
| CPSR_I
;
8040 new_mode
= ARM_CPU_MODE_FIQ
;
8042 /* Disable FIQ, IRQ and imprecise data aborts. */
8043 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
8047 new_mode
= ARM_CPU_MODE_MON
;
8049 mask
= CPSR_A
| CPSR_I
| CPSR_F
;
8053 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
8054 return; /* Never happens. Keep compiler happy. */
8057 if (new_mode
== ARM_CPU_MODE_MON
) {
8058 addr
+= env
->cp15
.mvbar
;
8059 } else if (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_V
) {
8060 /* High vectors. When enabled, base address cannot be remapped. */
8063 /* ARM v7 architectures provide a vector base address register to remap
8064 * the interrupt vector table.
8065 * This register is only followed in non-monitor mode, and is banked.
8066 * Note: only bits 31:5 are valid.
8068 addr
+= A32_BANKED_CURRENT_REG_GET(env
, vbar
);
8071 if ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_MON
) {
8072 env
->cp15
.scr_el3
&= ~SCR_NS
;
8075 switch_mode (env
, new_mode
);
8076 /* For exceptions taken to AArch32 we must clear the SS bit in both
8077 * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
8079 env
->uncached_cpsr
&= ~PSTATE_SS
;
8080 env
->spsr
= cpsr_read(env
);
8081 /* Clear IT bits. */
8082 env
->condexec_bits
= 0;
8083 /* Switch to the new mode, and to the correct instruction set. */
8084 env
->uncached_cpsr
= (env
->uncached_cpsr
& ~CPSR_M
) | new_mode
;
8085 /* Set new mode endianness */
8086 env
->uncached_cpsr
&= ~CPSR_E
;
8087 if (env
->cp15
.sctlr_el
[arm_current_el(env
)] & SCTLR_EE
) {
8088 env
->uncached_cpsr
|= CPSR_E
;
8091 /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
8092 * and we should just guard the thumb mode on V4 */
8093 if (arm_feature(env
, ARM_FEATURE_V4T
)) {
8094 env
->thumb
= (A32_BANKED_CURRENT_REG_GET(env
, sctlr
) & SCTLR_TE
) != 0;
8096 env
->regs
[14] = env
->regs
[15] + offset
;
8097 env
->regs
[15] = addr
;
8100 /* Handle exception entry to a target EL which is using AArch64 */
8101 static void arm_cpu_do_interrupt_aarch64(CPUState
*cs
)
8103 ARMCPU
*cpu
= ARM_CPU(cs
);
8104 CPUARMState
*env
= &cpu
->env
;
8105 unsigned int new_el
= env
->exception
.target_el
;
8106 target_ulong addr
= env
->cp15
.vbar_el
[new_el
];
8107 unsigned int new_mode
= aarch64_pstate_mode(new_el
, true);
8109 if (arm_current_el(env
) < new_el
) {
8110 /* Entry vector offset depends on whether the implemented EL
8111 * immediately lower than the target level is using AArch32 or AArch64
8117 is_aa64
= (env
->cp15
.scr_el3
& SCR_RW
) != 0;
8120 is_aa64
= (env
->cp15
.hcr_el2
& HCR_RW
) != 0;
8123 is_aa64
= is_a64(env
);
8126 g_assert_not_reached();
8134 } else if (pstate_read(env
) & PSTATE_SP
) {
8138 switch (cs
->exception_index
) {
8139 case EXCP_PREFETCH_ABORT
:
8140 case EXCP_DATA_ABORT
:
8141 env
->cp15
.far_el
[new_el
] = env
->exception
.vaddress
;
8142 qemu_log_mask(CPU_LOG_INT
, "...with FAR 0x%" PRIx64
"\n",
8143 env
->cp15
.far_el
[new_el
]);
8151 env
->cp15
.esr_el
[new_el
] = env
->exception
.syndrome
;
8162 qemu_log_mask(CPU_LOG_INT
,
8163 "...handling as semihosting call 0x%" PRIx64
"\n",
8165 env
->xregs
[0] = do_arm_semihosting(env
);
8168 cpu_abort(cs
, "Unhandled exception 0x%x\n", cs
->exception_index
);
8172 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = pstate_read(env
);
8173 aarch64_save_sp(env
, arm_current_el(env
));
8174 env
->elr_el
[new_el
] = env
->pc
;
8176 env
->banked_spsr
[aarch64_banked_spsr_index(new_el
)] = cpsr_read(env
);
8177 env
->elr_el
[new_el
] = env
->regs
[15];
8179 aarch64_sync_32_to_64(env
);
8181 env
->condexec_bits
= 0;
8183 qemu_log_mask(CPU_LOG_INT
, "...with ELR 0x%" PRIx64
"\n",
8184 env
->elr_el
[new_el
]);
8186 pstate_write(env
, PSTATE_DAIF
| new_mode
);
8188 aarch64_restore_sp(env
, new_el
);
8192 qemu_log_mask(CPU_LOG_INT
, "...to EL%d PC 0x%" PRIx64
" PSTATE 0x%x\n",
8193 new_el
, env
->pc
, pstate_read(env
));
8196 static inline bool check_for_semihosting(CPUState
*cs
)
8198 /* Check whether this exception is a semihosting call; if so
8199 * then handle it and return true; otherwise return false.
8201 ARMCPU
*cpu
= ARM_CPU(cs
);
8202 CPUARMState
*env
= &cpu
->env
;
8205 if (cs
->exception_index
== EXCP_SEMIHOST
) {
8206 /* This is always the 64-bit semihosting exception.
8207 * The "is this usermode" and "is semihosting enabled"
8208 * checks have been done at translate time.
8210 qemu_log_mask(CPU_LOG_INT
,
8211 "...handling as semihosting call 0x%" PRIx64
"\n",
8213 env
->xregs
[0] = do_arm_semihosting(env
);
8220 /* Only intercept calls from privileged modes, to provide some
8221 * semblance of security.
8223 if (cs
->exception_index
!= EXCP_SEMIHOST
&&
8224 (!semihosting_enabled() ||
8225 ((env
->uncached_cpsr
& CPSR_M
) == ARM_CPU_MODE_USR
))) {
8229 switch (cs
->exception_index
) {
8231 /* This is always a semihosting call; the "is this usermode"
8232 * and "is semihosting enabled" checks have been done at
8237 /* Check for semihosting interrupt. */
8239 imm
= arm_lduw_code(env
, env
->regs
[15] - 2, arm_sctlr_b(env
))
8245 imm
= arm_ldl_code(env
, env
->regs
[15] - 4, arm_sctlr_b(env
))
8247 if (imm
== 0x123456) {
8253 /* See if this is a semihosting syscall. */
8255 imm
= arm_lduw_code(env
, env
->regs
[15], arm_sctlr_b(env
))
8267 qemu_log_mask(CPU_LOG_INT
,
8268 "...handling as semihosting call 0x%x\n",
8270 env
->regs
[0] = do_arm_semihosting(env
);
8275 /* Handle a CPU exception for A and R profile CPUs.
8276 * Do any appropriate logging, handle PSCI calls, and then hand off
8277 * to the AArch64-entry or AArch32-entry function depending on the
8278 * target exception level's register width.
8280 void arm_cpu_do_interrupt(CPUState
*cs
)
8282 ARMCPU
*cpu
= ARM_CPU(cs
);
8283 CPUARMState
*env
= &cpu
->env
;
8284 unsigned int new_el
= env
->exception
.target_el
;
8286 assert(!arm_feature(env
, ARM_FEATURE_M
));
8288 arm_log_exception(cs
->exception_index
);
8289 qemu_log_mask(CPU_LOG_INT
, "...from EL%d to EL%d\n", arm_current_el(env
),
8291 if (qemu_loglevel_mask(CPU_LOG_INT
)
8292 && !excp_is_internal(cs
->exception_index
)) {
8293 qemu_log_mask(CPU_LOG_INT
, "...with ESR 0x%x/0x%" PRIx32
"\n",
8294 env
->exception
.syndrome
>> ARM_EL_EC_SHIFT
,
8295 env
->exception
.syndrome
);
8298 if (arm_is_psci_call(cpu
, cs
->exception_index
)) {
8299 arm_handle_psci_call(cpu
);
8300 qemu_log_mask(CPU_LOG_INT
, "...handled as PSCI call\n");
8304 /* Semihosting semantics depend on the register width of the
8305 * code that caused the exception, not the target exception level,
8306 * so must be handled here.
8308 if (check_for_semihosting(cs
)) {
8312 /* Hooks may change global state so BQL should be held, also the
8313 * BQL needs to be held for any modification of
8314 * cs->interrupt_request.
8316 g_assert(qemu_mutex_iothread_locked());
8318 arm_call_pre_el_change_hook(cpu
);
8320 assert(!excp_is_internal(cs
->exception_index
));
8321 if (arm_el_is_aa64(env
, new_el
)) {
8322 arm_cpu_do_interrupt_aarch64(cs
);
8324 arm_cpu_do_interrupt_aarch32(cs
);
8327 arm_call_el_change_hook(cpu
);
8329 if (!kvm_enabled()) {
8330 cs
->interrupt_request
|= CPU_INTERRUPT_EXITTB
;
8334 /* Return the exception level which controls this address translation regime */
8335 static inline uint32_t regime_el(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8338 case ARMMMUIdx_S2NS
:
8339 case ARMMMUIdx_S1E2
:
8341 case ARMMMUIdx_S1E3
:
8343 case ARMMMUIdx_S1SE0
:
8344 return arm_el_is_aa64(env
, 3) ? 1 : 3;
8345 case ARMMMUIdx_S1SE1
:
8346 case ARMMMUIdx_S1NSE0
:
8347 case ARMMMUIdx_S1NSE1
:
8348 case ARMMMUIdx_MPrivNegPri
:
8349 case ARMMMUIdx_MUserNegPri
:
8350 case ARMMMUIdx_MPriv
:
8351 case ARMMMUIdx_MUser
:
8352 case ARMMMUIdx_MSPrivNegPri
:
8353 case ARMMMUIdx_MSUserNegPri
:
8354 case ARMMMUIdx_MSPriv
:
8355 case ARMMMUIdx_MSUser
:
8358 g_assert_not_reached();
8362 /* Return the SCTLR value which controls this address translation regime */
8363 static inline uint32_t regime_sctlr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8365 return env
->cp15
.sctlr_el
[regime_el(env
, mmu_idx
)];
8368 /* Return true if the specified stage of address translation is disabled */
8369 static inline bool regime_translation_disabled(CPUARMState
*env
,
8372 if (arm_feature(env
, ARM_FEATURE_M
)) {
8373 switch (env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)] &
8374 (R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
)) {
8375 case R_V7M_MPU_CTRL_ENABLE_MASK
:
8376 /* Enabled, but not for HardFault and NMI */
8377 return mmu_idx
& ARM_MMU_IDX_M_NEGPRI
;
8378 case R_V7M_MPU_CTRL_ENABLE_MASK
| R_V7M_MPU_CTRL_HFNMIENA_MASK
:
8379 /* Enabled for all cases */
8383 /* HFNMIENA set and ENABLE clear is UNPREDICTABLE, but
8384 * we warned about that in armv7m_nvic.c when the guest set it.
8390 if (mmu_idx
== ARMMMUIdx_S2NS
) {
8391 return (env
->cp15
.hcr_el2
& HCR_VM
) == 0;
8393 return (regime_sctlr(env
, mmu_idx
) & SCTLR_M
) == 0;
8396 static inline bool regime_translation_big_endian(CPUARMState
*env
,
8399 return (regime_sctlr(env
, mmu_idx
) & SCTLR_EE
) != 0;
8402 /* Return the TCR controlling this translation regime */
8403 static inline TCR
*regime_tcr(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8405 if (mmu_idx
== ARMMMUIdx_S2NS
) {
8406 return &env
->cp15
.vtcr_el2
;
8408 return &env
->cp15
.tcr_el
[regime_el(env
, mmu_idx
)];
8411 /* Convert a possible stage1+2 MMU index into the appropriate
8414 static inline ARMMMUIdx
stage_1_mmu_idx(ARMMMUIdx mmu_idx
)
8416 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
8417 mmu_idx
+= (ARMMMUIdx_S1NSE0
- ARMMMUIdx_S12NSE0
);
8422 /* Returns TBI0 value for current regime el */
8423 uint32_t arm_regime_tbi0(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8428 /* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
8429 * a stage 1+2 mmu index into the appropriate stage 1 mmu index.
8431 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
8433 tcr
= regime_tcr(env
, mmu_idx
);
8434 el
= regime_el(env
, mmu_idx
);
8437 return extract64(tcr
->raw_tcr
, 20, 1);
8439 return extract64(tcr
->raw_tcr
, 37, 1);
8443 /* Returns TBI1 value for current regime el */
8444 uint32_t arm_regime_tbi1(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8449 /* For EL0 and EL1, TBI is controlled by stage 1's TCR, so convert
8450 * a stage 1+2 mmu index into the appropriate stage 1 mmu index.
8452 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
8454 tcr
= regime_tcr(env
, mmu_idx
);
8455 el
= regime_el(env
, mmu_idx
);
8460 return extract64(tcr
->raw_tcr
, 38, 1);
8464 /* Return the TTBR associated with this translation regime */
8465 static inline uint64_t regime_ttbr(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8468 if (mmu_idx
== ARMMMUIdx_S2NS
) {
8469 return env
->cp15
.vttbr_el2
;
8472 return env
->cp15
.ttbr0_el
[regime_el(env
, mmu_idx
)];
8474 return env
->cp15
.ttbr1_el
[regime_el(env
, mmu_idx
)];
8478 /* Return true if the translation regime is using LPAE format page tables */
8479 static inline bool regime_using_lpae_format(CPUARMState
*env
,
8482 int el
= regime_el(env
, mmu_idx
);
8483 if (el
== 2 || arm_el_is_aa64(env
, el
)) {
8486 if (arm_feature(env
, ARM_FEATURE_LPAE
)
8487 && (regime_tcr(env
, mmu_idx
)->raw_tcr
& TTBCR_EAE
)) {
8493 /* Returns true if the stage 1 translation regime is using LPAE format page
8494 * tables. Used when raising alignment exceptions, whose FSR changes depending
8495 * on whether the long or short descriptor format is in use. */
8496 bool arm_s1_regime_using_lpae_format(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8498 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
8500 return regime_using_lpae_format(env
, mmu_idx
);
8503 static inline bool regime_is_user(CPUARMState
*env
, ARMMMUIdx mmu_idx
)
8506 case ARMMMUIdx_S1SE0
:
8507 case ARMMMUIdx_S1NSE0
:
8508 case ARMMMUIdx_MUser
:
8509 case ARMMMUIdx_MSUser
:
8510 case ARMMMUIdx_MUserNegPri
:
8511 case ARMMMUIdx_MSUserNegPri
:
8515 case ARMMMUIdx_S12NSE0
:
8516 case ARMMMUIdx_S12NSE1
:
8517 g_assert_not_reached();
8521 /* Translate section/page access permissions to page
8522 * R/W protection flags
8525 * @mmu_idx: MMU index indicating required translation regime
8526 * @ap: The 3-bit access permissions (AP[2:0])
8527 * @domain_prot: The 2-bit domain access permissions
8529 static inline int ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8530 int ap
, int domain_prot
)
8532 bool is_user
= regime_is_user(env
, mmu_idx
);
8534 if (domain_prot
== 3) {
8535 return PAGE_READ
| PAGE_WRITE
;
8540 if (arm_feature(env
, ARM_FEATURE_V7
)) {
8543 switch (regime_sctlr(env
, mmu_idx
) & (SCTLR_S
| SCTLR_R
)) {
8545 return is_user
? 0 : PAGE_READ
;
8552 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
8557 return PAGE_READ
| PAGE_WRITE
;
8560 return PAGE_READ
| PAGE_WRITE
;
8561 case 4: /* Reserved. */
8564 return is_user
? 0 : PAGE_READ
;
8568 if (!arm_feature(env
, ARM_FEATURE_V6K
)) {
8573 g_assert_not_reached();
8577 /* Translate section/page access permissions to page
8578 * R/W protection flags.
8580 * @ap: The 2-bit simple AP (AP[2:1])
8581 * @is_user: TRUE if accessing from PL0
8583 static inline int simple_ap_to_rw_prot_is_user(int ap
, bool is_user
)
8587 return is_user
? 0 : PAGE_READ
| PAGE_WRITE
;
8589 return PAGE_READ
| PAGE_WRITE
;
8591 return is_user
? 0 : PAGE_READ
;
8595 g_assert_not_reached();
8600 simple_ap_to_rw_prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, int ap
)
8602 return simple_ap_to_rw_prot_is_user(ap
, regime_is_user(env
, mmu_idx
));
8605 /* Translate S2 section/page access permissions to protection flags
8608 * @s2ap: The 2-bit stage2 access permissions (S2AP)
8609 * @xn: XN (execute-never) bit
8611 static int get_S2prot(CPUARMState
*env
, int s2ap
, int xn
)
8622 if (arm_el_is_aa64(env
, 2) || prot
& PAGE_READ
) {
8629 /* Translate section/page access permissions to protection flags
8632 * @mmu_idx: MMU index indicating required translation regime
8633 * @is_aa64: TRUE if AArch64
8634 * @ap: The 2-bit simple AP (AP[2:1])
8635 * @ns: NS (non-secure) bit
8636 * @xn: XN (execute-never) bit
8637 * @pxn: PXN (privileged execute-never) bit
8639 static int get_S1prot(CPUARMState
*env
, ARMMMUIdx mmu_idx
, bool is_aa64
,
8640 int ap
, int ns
, int xn
, int pxn
)
8642 bool is_user
= regime_is_user(env
, mmu_idx
);
8643 int prot_rw
, user_rw
;
8647 assert(mmu_idx
!= ARMMMUIdx_S2NS
);
8649 user_rw
= simple_ap_to_rw_prot_is_user(ap
, true);
8653 prot_rw
= simple_ap_to_rw_prot_is_user(ap
, false);
8656 if (ns
&& arm_is_secure(env
) && (env
->cp15
.scr_el3
& SCR_SIF
)) {
8660 /* TODO have_wxn should be replaced with
8661 * ARM_FEATURE_V8 || (ARM_FEATURE_V7 && ARM_FEATURE_EL2)
8662 * when ARM_FEATURE_EL2 starts getting set. For now we assume all LPAE
8663 * compatible processors have EL2, which is required for [U]WXN.
8665 have_wxn
= arm_feature(env
, ARM_FEATURE_LPAE
);
8668 wxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_WXN
;
8672 switch (regime_el(env
, mmu_idx
)) {
8675 xn
= pxn
|| (user_rw
& PAGE_WRITE
);
8682 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
8683 switch (regime_el(env
, mmu_idx
)) {
8687 xn
= xn
|| !(user_rw
& PAGE_READ
);
8691 uwxn
= regime_sctlr(env
, mmu_idx
) & SCTLR_UWXN
;
8693 xn
= xn
|| !(prot_rw
& PAGE_READ
) || pxn
||
8694 (uwxn
&& (user_rw
& PAGE_WRITE
));
8704 if (xn
|| (wxn
&& (prot_rw
& PAGE_WRITE
))) {
8707 return prot_rw
| PAGE_EXEC
;
8710 static bool get_level1_table_address(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8711 uint32_t *table
, uint32_t address
)
8713 /* Note that we can only get here for an AArch32 PL0/PL1 lookup */
8714 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
8716 if (address
& tcr
->mask
) {
8717 if (tcr
->raw_tcr
& TTBCR_PD1
) {
8718 /* Translation table walk disabled for TTBR1 */
8721 *table
= regime_ttbr(env
, mmu_idx
, 1) & 0xffffc000;
8723 if (tcr
->raw_tcr
& TTBCR_PD0
) {
8724 /* Translation table walk disabled for TTBR0 */
8727 *table
= regime_ttbr(env
, mmu_idx
, 0) & tcr
->base_mask
;
8729 *table
|= (address
>> 18) & 0x3ffc;
8733 /* Translate a S1 pagetable walk through S2 if needed. */
8734 static hwaddr
S1_ptw_translate(CPUARMState
*env
, ARMMMUIdx mmu_idx
,
8735 hwaddr addr
, MemTxAttrs txattrs
,
8736 ARMMMUFaultInfo
*fi
)
8738 if ((mmu_idx
== ARMMMUIdx_S1NSE0
|| mmu_idx
== ARMMMUIdx_S1NSE1
) &&
8739 !regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
8740 target_ulong s2size
;
8745 ret
= get_phys_addr_lpae(env
, addr
, 0, ARMMMUIdx_S2NS
, &s2pa
,
8746 &txattrs
, &s2prot
, &s2size
, fi
, NULL
);
8748 assert(fi
->type
!= ARMFault_None
);
8759 /* All loads done in the course of a page table walk go through here. */
8760 static uint32_t arm_ldl_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
8761 ARMMMUIdx mmu_idx
, ARMMMUFaultInfo
*fi
)
8763 ARMCPU
*cpu
= ARM_CPU(cs
);
8764 CPUARMState
*env
= &cpu
->env
;
8765 MemTxAttrs attrs
= {};
8766 MemTxResult result
= MEMTX_OK
;
8770 attrs
.secure
= is_secure
;
8771 as
= arm_addressspace(cs
, attrs
);
8772 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fi
);
8776 if (regime_translation_big_endian(env
, mmu_idx
)) {
8777 data
= address_space_ldl_be(as
, addr
, attrs
, &result
);
8779 data
= address_space_ldl_le(as
, addr
, attrs
, &result
);
8781 if (result
== MEMTX_OK
) {
8784 fi
->type
= ARMFault_SyncExternalOnWalk
;
8785 fi
->ea
= arm_extabort_type(result
);
8789 static uint64_t arm_ldq_ptw(CPUState
*cs
, hwaddr addr
, bool is_secure
,
8790 ARMMMUIdx mmu_idx
, ARMMMUFaultInfo
*fi
)
8792 ARMCPU
*cpu
= ARM_CPU(cs
);
8793 CPUARMState
*env
= &cpu
->env
;
8794 MemTxAttrs attrs
= {};
8795 MemTxResult result
= MEMTX_OK
;
8799 attrs
.secure
= is_secure
;
8800 as
= arm_addressspace(cs
, attrs
);
8801 addr
= S1_ptw_translate(env
, mmu_idx
, addr
, attrs
, fi
);
8805 if (regime_translation_big_endian(env
, mmu_idx
)) {
8806 data
= address_space_ldq_be(as
, addr
, attrs
, &result
);
8808 data
= address_space_ldq_le(as
, addr
, attrs
, &result
);
8810 if (result
== MEMTX_OK
) {
8813 fi
->type
= ARMFault_SyncExternalOnWalk
;
8814 fi
->ea
= arm_extabort_type(result
);
8818 static bool get_phys_addr_v5(CPUARMState
*env
, uint32_t address
,
8819 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
8820 hwaddr
*phys_ptr
, int *prot
,
8821 target_ulong
*page_size
,
8822 ARMMMUFaultInfo
*fi
)
8824 CPUState
*cs
= CPU(arm_env_get_cpu(env
));
8835 /* Pagetable walk. */
8836 /* Lookup l1 descriptor. */
8837 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
8838 /* Section translation fault if page walk is disabled by PD0 or PD1 */
8839 fi
->type
= ARMFault_Translation
;
8842 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8844 if (fi
->type
!= ARMFault_None
) {
8848 domain
= (desc
>> 5) & 0x0f;
8849 if (regime_el(env
, mmu_idx
) == 1) {
8850 dacr
= env
->cp15
.dacr_ns
;
8852 dacr
= env
->cp15
.dacr_s
;
8854 domain_prot
= (dacr
>> (domain
* 2)) & 3;
8856 /* Section translation fault. */
8857 fi
->type
= ARMFault_Translation
;
8863 if (domain_prot
== 0 || domain_prot
== 2) {
8864 fi
->type
= ARMFault_Domain
;
8869 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
8870 ap
= (desc
>> 10) & 3;
8871 *page_size
= 1024 * 1024;
8873 /* Lookup l2 entry. */
8875 /* Coarse pagetable. */
8876 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
8878 /* Fine pagetable. */
8879 table
= (desc
& 0xfffff000) | ((address
>> 8) & 0xffc);
8881 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8883 if (fi
->type
!= ARMFault_None
) {
8887 case 0: /* Page translation fault. */
8888 fi
->type
= ARMFault_Translation
;
8890 case 1: /* 64k page. */
8891 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
8892 ap
= (desc
>> (4 + ((address
>> 13) & 6))) & 3;
8893 *page_size
= 0x10000;
8895 case 2: /* 4k page. */
8896 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
8897 ap
= (desc
>> (4 + ((address
>> 9) & 6))) & 3;
8898 *page_size
= 0x1000;
8900 case 3: /* 1k page, or ARMv6/XScale "extended small (4k) page" */
8902 /* ARMv6/XScale extended small page format */
8903 if (arm_feature(env
, ARM_FEATURE_XSCALE
)
8904 || arm_feature(env
, ARM_FEATURE_V6
)) {
8905 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
8906 *page_size
= 0x1000;
8908 /* UNPREDICTABLE in ARMv5; we choose to take a
8909 * page translation fault.
8911 fi
->type
= ARMFault_Translation
;
8915 phys_addr
= (desc
& 0xfffffc00) | (address
& 0x3ff);
8918 ap
= (desc
>> 4) & 3;
8921 /* Never happens, but compiler isn't smart enough to tell. */
8925 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
8926 *prot
|= *prot
? PAGE_EXEC
: 0;
8927 if (!(*prot
& (1 << access_type
))) {
8928 /* Access permission fault. */
8929 fi
->type
= ARMFault_Permission
;
8932 *phys_ptr
= phys_addr
;
8935 fi
->domain
= domain
;
8940 static bool get_phys_addr_v6(CPUARMState
*env
, uint32_t address
,
8941 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
8942 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
8943 target_ulong
*page_size
, ARMMMUFaultInfo
*fi
)
8945 CPUState
*cs
= CPU(arm_env_get_cpu(env
));
8959 /* Pagetable walk. */
8960 /* Lookup l1 descriptor. */
8961 if (!get_level1_table_address(env
, mmu_idx
, &table
, address
)) {
8962 /* Section translation fault if page walk is disabled by PD0 or PD1 */
8963 fi
->type
= ARMFault_Translation
;
8966 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
8968 if (fi
->type
!= ARMFault_None
) {
8972 if (type
== 0 || (type
== 3 && !arm_feature(env
, ARM_FEATURE_PXN
))) {
8973 /* Section translation fault, or attempt to use the encoding
8974 * which is Reserved on implementations without PXN.
8976 fi
->type
= ARMFault_Translation
;
8979 if ((type
== 1) || !(desc
& (1 << 18))) {
8980 /* Page or Section. */
8981 domain
= (desc
>> 5) & 0x0f;
8983 if (regime_el(env
, mmu_idx
) == 1) {
8984 dacr
= env
->cp15
.dacr_ns
;
8986 dacr
= env
->cp15
.dacr_s
;
8991 domain_prot
= (dacr
>> (domain
* 2)) & 3;
8992 if (domain_prot
== 0 || domain_prot
== 2) {
8993 /* Section or Page domain fault */
8994 fi
->type
= ARMFault_Domain
;
8998 if (desc
& (1 << 18)) {
9000 phys_addr
= (desc
& 0xff000000) | (address
& 0x00ffffff);
9001 phys_addr
|= (uint64_t)extract32(desc
, 20, 4) << 32;
9002 phys_addr
|= (uint64_t)extract32(desc
, 5, 4) << 36;
9003 *page_size
= 0x1000000;
9006 phys_addr
= (desc
& 0xfff00000) | (address
& 0x000fffff);
9007 *page_size
= 0x100000;
9009 ap
= ((desc
>> 10) & 3) | ((desc
>> 13) & 4);
9010 xn
= desc
& (1 << 4);
9012 ns
= extract32(desc
, 19, 1);
9014 if (arm_feature(env
, ARM_FEATURE_PXN
)) {
9015 pxn
= (desc
>> 2) & 1;
9017 ns
= extract32(desc
, 3, 1);
9018 /* Lookup l2 entry. */
9019 table
= (desc
& 0xfffffc00) | ((address
>> 10) & 0x3fc);
9020 desc
= arm_ldl_ptw(cs
, table
, regime_is_secure(env
, mmu_idx
),
9022 if (fi
->type
!= ARMFault_None
) {
9025 ap
= ((desc
>> 4) & 3) | ((desc
>> 7) & 4);
9027 case 0: /* Page translation fault. */
9028 fi
->type
= ARMFault_Translation
;
9030 case 1: /* 64k page. */
9031 phys_addr
= (desc
& 0xffff0000) | (address
& 0xffff);
9032 xn
= desc
& (1 << 15);
9033 *page_size
= 0x10000;
9035 case 2: case 3: /* 4k page. */
9036 phys_addr
= (desc
& 0xfffff000) | (address
& 0xfff);
9038 *page_size
= 0x1000;
9041 /* Never happens, but compiler isn't smart enough to tell. */
9045 if (domain_prot
== 3) {
9046 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
9048 if (pxn
&& !regime_is_user(env
, mmu_idx
)) {
9051 if (xn
&& access_type
== MMU_INST_FETCH
) {
9052 fi
->type
= ARMFault_Permission
;
9056 if (arm_feature(env
, ARM_FEATURE_V6K
) &&
9057 (regime_sctlr(env
, mmu_idx
) & SCTLR_AFE
)) {
9058 /* The simplified model uses AP[0] as an access control bit. */
9059 if ((ap
& 1) == 0) {
9060 /* Access flag fault. */
9061 fi
->type
= ARMFault_AccessFlag
;
9064 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
>> 1);
9066 *prot
= ap_to_rw_prot(env
, mmu_idx
, ap
, domain_prot
);
9071 if (!(*prot
& (1 << access_type
))) {
9072 /* Access permission fault. */
9073 fi
->type
= ARMFault_Permission
;
9078 /* The NS bit will (as required by the architecture) have no effect if
9079 * the CPU doesn't support TZ or this is a non-secure translation
9080 * regime, because the attribute will already be non-secure.
9082 attrs
->secure
= false;
9084 *phys_ptr
= phys_addr
;
9087 fi
->domain
= domain
;
9093 * check_s2_mmu_setup
9095 * @is_aa64: True if the translation regime is in AArch64 state
9096 * @startlevel: Suggested starting level
9097 * @inputsize: Bitsize of IPAs
9098 * @stride: Page-table stride (See the ARM ARM)
9100 * Returns true if the suggested S2 translation parameters are OK and
9103 static bool check_s2_mmu_setup(ARMCPU
*cpu
, bool is_aa64
, int level
,
9104 int inputsize
, int stride
)
9106 const int grainsize
= stride
+ 3;
9109 /* Negative levels are never allowed. */
9114 startsizecheck
= inputsize
- ((3 - level
) * stride
+ grainsize
);
9115 if (startsizecheck
< 1 || startsizecheck
> stride
+ 4) {
9120 CPUARMState
*env
= &cpu
->env
;
9121 unsigned int pamax
= arm_pamax(cpu
);
9124 case 13: /* 64KB Pages. */
9125 if (level
== 0 || (level
== 1 && pamax
<= 42)) {
9129 case 11: /* 16KB Pages. */
9130 if (level
== 0 || (level
== 1 && pamax
<= 40)) {
9134 case 9: /* 4KB Pages. */
9135 if (level
== 0 && pamax
<= 42) {
9140 g_assert_not_reached();
9143 /* Inputsize checks. */
9144 if (inputsize
> pamax
&&
9145 (arm_el_is_aa64(env
, 1) || inputsize
> 40)) {
9146 /* This is CONSTRAINED UNPREDICTABLE and we choose to fault. */
9150 /* AArch32 only supports 4KB pages. Assert on that. */
9151 assert(stride
== 9);
9160 /* Translate from the 4-bit stage 2 representation of
9161 * memory attributes (without cache-allocation hints) to
9162 * the 8-bit representation of the stage 1 MAIR registers
9163 * (which includes allocation hints).
9165 * ref: shared/translation/attrs/S2AttrDecode()
9166 * .../S2ConvertAttrsHints()
9168 static uint8_t convert_stage2_attrs(CPUARMState
*env
, uint8_t s2attrs
)
9170 uint8_t hiattr
= extract32(s2attrs
, 2, 2);
9171 uint8_t loattr
= extract32(s2attrs
, 0, 2);
9172 uint8_t hihint
= 0, lohint
= 0;
9174 if (hiattr
!= 0) { /* normal memory */
9175 if ((env
->cp15
.hcr_el2
& HCR_CD
) != 0) { /* cache disabled */
9176 hiattr
= loattr
= 1; /* non-cacheable */
9178 if (hiattr
!= 1) { /* Write-through or write-back */
9179 hihint
= 3; /* RW allocate */
9181 if (loattr
!= 1) { /* Write-through or write-back */
9182 lohint
= 3; /* RW allocate */
9187 return (hiattr
<< 6) | (hihint
<< 4) | (loattr
<< 2) | lohint
;
9190 static bool get_phys_addr_lpae(CPUARMState
*env
, target_ulong address
,
9191 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9192 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
, int *prot
,
9193 target_ulong
*page_size_ptr
,
9194 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
9196 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9197 CPUState
*cs
= CPU(cpu
);
9198 /* Read an LPAE long-descriptor translation table. */
9199 ARMFaultType fault_type
= ARMFault_Translation
;
9206 hwaddr descaddr
, indexmask
, indexmask_grainsize
;
9207 uint32_t tableattrs
;
9208 target_ulong page_size
;
9214 TCR
*tcr
= regime_tcr(env
, mmu_idx
);
9215 int ap
, ns
, xn
, pxn
;
9216 uint32_t el
= regime_el(env
, mmu_idx
);
9217 bool ttbr1_valid
= true;
9218 uint64_t descaddrmask
;
9219 bool aarch64
= arm_el_is_aa64(env
, el
);
9222 * This code does not handle the different format TCR for VTCR_EL2.
9223 * This code also does not support shareability levels.
9224 * Attribute and permission bit handling should also be checked when adding
9225 * support for those page table walks.
9231 if (mmu_idx
!= ARMMMUIdx_S2NS
) {
9232 tbi
= extract64(tcr
->raw_tcr
, 20, 1);
9235 if (extract64(address
, 55, 1)) {
9236 tbi
= extract64(tcr
->raw_tcr
, 38, 1);
9238 tbi
= extract64(tcr
->raw_tcr
, 37, 1);
9243 /* If we are in 64-bit EL2 or EL3 then there is no TTBR1, so mark it
9247 ttbr1_valid
= false;
9252 /* There is no TTBR1 for EL2 */
9254 ttbr1_valid
= false;
9258 /* Determine whether this address is in the region controlled by
9259 * TTBR0 or TTBR1 (or if it is in neither region and should fault).
9260 * This is a Non-secure PL0/1 stage 1 translation, so controlled by
9261 * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
9264 /* AArch64 translation. */
9265 t0sz
= extract32(tcr
->raw_tcr
, 0, 6);
9266 t0sz
= MIN(t0sz
, 39);
9267 t0sz
= MAX(t0sz
, 16);
9268 } else if (mmu_idx
!= ARMMMUIdx_S2NS
) {
9269 /* AArch32 stage 1 translation. */
9270 t0sz
= extract32(tcr
->raw_tcr
, 0, 3);
9272 /* AArch32 stage 2 translation. */
9273 bool sext
= extract32(tcr
->raw_tcr
, 4, 1);
9274 bool sign
= extract32(tcr
->raw_tcr
, 3, 1);
9275 /* Address size is 40-bit for a stage 2 translation,
9276 * and t0sz can be negative (from -8 to 7),
9277 * so we need to adjust it to use the TTBR selecting logic below.
9280 t0sz
= sextract32(tcr
->raw_tcr
, 0, 4) + 8;
9282 /* If the sign-extend bit is not the same as t0sz[3], the result
9283 * is unpredictable. Flag this as a guest error. */
9285 qemu_log_mask(LOG_GUEST_ERROR
,
9286 "AArch32: VTCR.S / VTCR.T0SZ[3] mismatch\n");
9289 t1sz
= extract32(tcr
->raw_tcr
, 16, 6);
9291 t1sz
= MIN(t1sz
, 39);
9292 t1sz
= MAX(t1sz
, 16);
9294 if (t0sz
&& !extract64(address
, addrsize
- t0sz
, t0sz
- tbi
)) {
9295 /* there is a ttbr0 region and we are in it (high bits all zero) */
9297 } else if (ttbr1_valid
&& t1sz
&&
9298 !extract64(~address
, addrsize
- t1sz
, t1sz
- tbi
)) {
9299 /* there is a ttbr1 region and we are in it (high bits all one) */
9302 /* ttbr0 region is "everything not in the ttbr1 region" */
9304 } else if (!t1sz
&& ttbr1_valid
) {
9305 /* ttbr1 region is "everything not in the ttbr0 region" */
9308 /* in the gap between the two regions, this is a Translation fault */
9309 fault_type
= ARMFault_Translation
;
9313 /* Note that QEMU ignores shareability and cacheability attributes,
9314 * so we don't need to do anything with the SH, ORGN, IRGN fields
9315 * in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
9316 * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
9317 * implement any ASID-like capability so we can ignore it (instead
9318 * we will always flush the TLB any time the ASID is changed).
9320 if (ttbr_select
== 0) {
9321 ttbr
= regime_ttbr(env
, mmu_idx
, 0);
9323 epd
= extract32(tcr
->raw_tcr
, 7, 1);
9325 inputsize
= addrsize
- t0sz
;
9327 tg
= extract32(tcr
->raw_tcr
, 14, 2);
9328 if (tg
== 1) { /* 64KB pages */
9331 if (tg
== 2) { /* 16KB pages */
9335 /* We should only be here if TTBR1 is valid */
9336 assert(ttbr1_valid
);
9338 ttbr
= regime_ttbr(env
, mmu_idx
, 1);
9339 epd
= extract32(tcr
->raw_tcr
, 23, 1);
9340 inputsize
= addrsize
- t1sz
;
9342 tg
= extract32(tcr
->raw_tcr
, 30, 2);
9343 if (tg
== 3) { /* 64KB pages */
9346 if (tg
== 1) { /* 16KB pages */
9351 /* Here we should have set up all the parameters for the translation:
9352 * inputsize, ttbr, epd, stride, tbi
9356 /* Translation table walk disabled => Translation fault on TLB miss
9357 * Note: This is always 0 on 64-bit EL2 and EL3.
9362 if (mmu_idx
!= ARMMMUIdx_S2NS
) {
9363 /* The starting level depends on the virtual address size (which can
9364 * be up to 48 bits) and the translation granule size. It indicates
9365 * the number of strides (stride bits at a time) needed to
9366 * consume the bits of the input address. In the pseudocode this is:
9367 * level = 4 - RoundUp((inputsize - grainsize) / stride)
9368 * where their 'inputsize' is our 'inputsize', 'grainsize' is
9369 * our 'stride + 3' and 'stride' is our 'stride'.
9370 * Applying the usual "rounded up m/n is (m+n-1)/n" and simplifying:
9371 * = 4 - (inputsize - stride - 3 + stride - 1) / stride
9372 * = 4 - (inputsize - 4) / stride;
9374 level
= 4 - (inputsize
- 4) / stride
;
9376 /* For stage 2 translations the starting level is specified by the
9377 * VTCR_EL2.SL0 field (whose interpretation depends on the page size)
9379 uint32_t sl0
= extract32(tcr
->raw_tcr
, 6, 2);
9380 uint32_t startlevel
;
9383 if (!aarch64
|| stride
== 9) {
9384 /* AArch32 or 4KB pages */
9385 startlevel
= 2 - sl0
;
9387 /* 16KB or 64KB pages */
9388 startlevel
= 3 - sl0
;
9391 /* Check that the starting level is valid. */
9392 ok
= check_s2_mmu_setup(cpu
, aarch64
, startlevel
,
9395 fault_type
= ARMFault_Translation
;
9401 indexmask_grainsize
= (1ULL << (stride
+ 3)) - 1;
9402 indexmask
= (1ULL << (inputsize
- (stride
* (4 - level
)))) - 1;
9404 /* Now we can extract the actual base address from the TTBR */
9405 descaddr
= extract64(ttbr
, 0, 48);
9406 descaddr
&= ~indexmask
;
9408 /* The address field in the descriptor goes up to bit 39 for ARMv7
9409 * but up to bit 47 for ARMv8, but we use the descaddrmask
9410 * up to bit 39 for AArch32, because we don't need other bits in that case
9411 * to construct next descriptor address (anyway they should be all zeroes).
9413 descaddrmask
= ((1ull << (aarch64
? 48 : 40)) - 1) &
9414 ~indexmask_grainsize
;
9416 /* Secure accesses start with the page table in secure memory and
9417 * can be downgraded to non-secure at any step. Non-secure accesses
9418 * remain non-secure. We implement this by just ORing in the NSTable/NS
9419 * bits at each step.
9421 tableattrs
= regime_is_secure(env
, mmu_idx
) ? 0 : (1 << 4);
9423 uint64_t descriptor
;
9426 descaddr
|= (address
>> (stride
* (4 - level
))) & indexmask
;
9428 nstable
= extract32(tableattrs
, 4, 1);
9429 descriptor
= arm_ldq_ptw(cs
, descaddr
, !nstable
, mmu_idx
, fi
);
9430 if (fi
->type
!= ARMFault_None
) {
9434 if (!(descriptor
& 1) ||
9435 (!(descriptor
& 2) && (level
== 3))) {
9436 /* Invalid, or the Reserved level 3 encoding */
9439 descaddr
= descriptor
& descaddrmask
;
9441 if ((descriptor
& 2) && (level
< 3)) {
9442 /* Table entry. The top five bits are attributes which may
9443 * propagate down through lower levels of the table (and
9444 * which are all arranged so that 0 means "no effect", so
9445 * we can gather them up by ORing in the bits at each level).
9447 tableattrs
|= extract64(descriptor
, 59, 5);
9449 indexmask
= indexmask_grainsize
;
9452 /* Block entry at level 1 or 2, or page entry at level 3.
9453 * These are basically the same thing, although the number
9454 * of bits we pull in from the vaddr varies.
9456 page_size
= (1ULL << ((stride
* (4 - level
)) + 3));
9457 descaddr
|= (address
& (page_size
- 1));
9458 /* Extract attributes from the descriptor */
9459 attrs
= extract64(descriptor
, 2, 10)
9460 | (extract64(descriptor
, 52, 12) << 10);
9462 if (mmu_idx
== ARMMMUIdx_S2NS
) {
9463 /* Stage 2 table descriptors do not include any attribute fields */
9466 /* Merge in attributes from table descriptors */
9467 attrs
|= extract32(tableattrs
, 0, 2) << 11; /* XN, PXN */
9468 attrs
|= extract32(tableattrs
, 3, 1) << 5; /* APTable[1] => AP[2] */
9469 /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
9470 * means "force PL1 access only", which means forcing AP[1] to 0.
9472 if (extract32(tableattrs
, 2, 1)) {
9475 attrs
|= nstable
<< 3; /* NS */
9478 /* Here descaddr is the final physical address, and attributes
9481 fault_type
= ARMFault_AccessFlag
;
9482 if ((attrs
& (1 << 8)) == 0) {
9487 ap
= extract32(attrs
, 4, 2);
9488 xn
= extract32(attrs
, 12, 1);
9490 if (mmu_idx
== ARMMMUIdx_S2NS
) {
9492 *prot
= get_S2prot(env
, ap
, xn
);
9494 ns
= extract32(attrs
, 3, 1);
9495 pxn
= extract32(attrs
, 11, 1);
9496 *prot
= get_S1prot(env
, mmu_idx
, aarch64
, ap
, ns
, xn
, pxn
);
9499 fault_type
= ARMFault_Permission
;
9500 if (!(*prot
& (1 << access_type
))) {
9505 /* The NS bit will (as required by the architecture) have no effect if
9506 * the CPU doesn't support TZ or this is a non-secure translation
9507 * regime, because the attribute will already be non-secure.
9509 txattrs
->secure
= false;
9512 if (cacheattrs
!= NULL
) {
9513 if (mmu_idx
== ARMMMUIdx_S2NS
) {
9514 cacheattrs
->attrs
= convert_stage2_attrs(env
,
9515 extract32(attrs
, 0, 4));
9517 /* Index into MAIR registers for cache attributes */
9518 uint8_t attrindx
= extract32(attrs
, 0, 3);
9519 uint64_t mair
= env
->cp15
.mair_el
[regime_el(env
, mmu_idx
)];
9520 assert(attrindx
<= 7);
9521 cacheattrs
->attrs
= extract64(mair
, attrindx
* 8, 8);
9523 cacheattrs
->shareability
= extract32(attrs
, 6, 2);
9526 *phys_ptr
= descaddr
;
9527 *page_size_ptr
= page_size
;
9531 fi
->type
= fault_type
;
9533 /* Tag the error as S2 for failed S1 PTW at S2 or ordinary S2. */
9534 fi
->stage2
= fi
->s1ptw
|| (mmu_idx
== ARMMMUIdx_S2NS
);
9538 static inline void get_phys_addr_pmsav7_default(CPUARMState
*env
,
9540 int32_t address
, int *prot
)
9542 if (!arm_feature(env
, ARM_FEATURE_M
)) {
9543 *prot
= PAGE_READ
| PAGE_WRITE
;
9545 case 0xF0000000 ... 0xFFFFFFFF:
9546 if (regime_sctlr(env
, mmu_idx
) & SCTLR_V
) {
9547 /* hivecs execing is ok */
9551 case 0x00000000 ... 0x7FFFFFFF:
9556 /* Default system address map for M profile cores.
9557 * The architecture specifies which regions are execute-never;
9558 * at the MPU level no other checks are defined.
9561 case 0x00000000 ... 0x1fffffff: /* ROM */
9562 case 0x20000000 ... 0x3fffffff: /* SRAM */
9563 case 0x60000000 ... 0x7fffffff: /* RAM */
9564 case 0x80000000 ... 0x9fffffff: /* RAM */
9565 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
9567 case 0x40000000 ... 0x5fffffff: /* Peripheral */
9568 case 0xa0000000 ... 0xbfffffff: /* Device */
9569 case 0xc0000000 ... 0xdfffffff: /* Device */
9570 case 0xe0000000 ... 0xffffffff: /* System */
9571 *prot
= PAGE_READ
| PAGE_WRITE
;
9574 g_assert_not_reached();
9579 static bool pmsav7_use_background_region(ARMCPU
*cpu
,
9580 ARMMMUIdx mmu_idx
, bool is_user
)
9582 /* Return true if we should use the default memory map as a
9583 * "background" region if there are no hits against any MPU regions.
9585 CPUARMState
*env
= &cpu
->env
;
9591 if (arm_feature(env
, ARM_FEATURE_M
)) {
9592 return env
->v7m
.mpu_ctrl
[regime_is_secure(env
, mmu_idx
)]
9593 & R_V7M_MPU_CTRL_PRIVDEFENA_MASK
;
9595 return regime_sctlr(env
, mmu_idx
) & SCTLR_BR
;
9599 static inline bool m_is_ppb_region(CPUARMState
*env
, uint32_t address
)
9601 /* True if address is in the M profile PPB region 0xe0000000 - 0xe00fffff */
9602 return arm_feature(env
, ARM_FEATURE_M
) &&
9603 extract32(address
, 20, 12) == 0xe00;
9606 static inline bool m_is_system_region(CPUARMState
*env
, uint32_t address
)
9608 /* True if address is in the M profile system region
9609 * 0xe0000000 - 0xffffffff
9611 return arm_feature(env
, ARM_FEATURE_M
) && extract32(address
, 29, 3) == 0x7;
9614 static bool get_phys_addr_pmsav7(CPUARMState
*env
, uint32_t address
,
9615 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9616 hwaddr
*phys_ptr
, int *prot
,
9617 target_ulong
*page_size
,
9618 ARMMMUFaultInfo
*fi
)
9620 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9622 bool is_user
= regime_is_user(env
, mmu_idx
);
9624 *phys_ptr
= address
;
9625 *page_size
= TARGET_PAGE_SIZE
;
9628 if (regime_translation_disabled(env
, mmu_idx
) ||
9629 m_is_ppb_region(env
, address
)) {
9630 /* MPU disabled or M profile PPB access: use default memory map.
9631 * The other case which uses the default memory map in the
9632 * v7M ARM ARM pseudocode is exception vector reads from the vector
9633 * table. In QEMU those accesses are done in arm_v7m_load_vector(),
9634 * which always does a direct read using address_space_ldl(), rather
9635 * than going via this function, so we don't need to check that here.
9637 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
9638 } else { /* MPU enabled */
9639 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
9641 uint32_t base
= env
->pmsav7
.drbar
[n
];
9642 uint32_t rsize
= extract32(env
->pmsav7
.drsr
[n
], 1, 5);
9646 if (!(env
->pmsav7
.drsr
[n
] & 0x1)) {
9651 qemu_log_mask(LOG_GUEST_ERROR
,
9652 "DRSR[%d]: Rsize field cannot be 0\n", n
);
9656 rmask
= (1ull << rsize
) - 1;
9659 qemu_log_mask(LOG_GUEST_ERROR
,
9660 "DRBAR[%d]: 0x%" PRIx32
" misaligned "
9661 "to DRSR region size, mask = 0x%" PRIx32
"\n",
9666 if (address
< base
|| address
> base
+ rmask
) {
9668 * Address not in this region. We must check whether the
9669 * region covers addresses in the same page as our address.
9670 * In that case we must not report a size that covers the
9671 * whole page for a subsequent hit against a different MPU
9672 * region or the background region, because it would result in
9673 * incorrect TLB hits for subsequent accesses to addresses that
9674 * are in this MPU region.
9676 if (ranges_overlap(base
, rmask
,
9677 address
& TARGET_PAGE_MASK
,
9678 TARGET_PAGE_SIZE
)) {
9684 /* Region matched */
9686 if (rsize
>= 8) { /* no subregions for regions < 256 bytes */
9688 uint32_t srdis_mask
;
9690 rsize
-= 3; /* sub region size (power of 2) */
9691 snd
= ((address
- base
) >> rsize
) & 0x7;
9692 srdis
= extract32(env
->pmsav7
.drsr
[n
], snd
+ 8, 1);
9694 srdis_mask
= srdis
? 0x3 : 0x0;
9695 for (i
= 2; i
<= 8 && rsize
< TARGET_PAGE_BITS
; i
*= 2) {
9696 /* This will check in groups of 2, 4 and then 8, whether
9697 * the subregion bits are consistent. rsize is incremented
9698 * back up to give the region size, considering consistent
9699 * adjacent subregions as one region. Stop testing if rsize
9700 * is already big enough for an entire QEMU page.
9702 int snd_rounded
= snd
& ~(i
- 1);
9703 uint32_t srdis_multi
= extract32(env
->pmsav7
.drsr
[n
],
9704 snd_rounded
+ 8, i
);
9705 if (srdis_mask
^ srdis_multi
) {
9708 srdis_mask
= (srdis_mask
<< i
) | srdis_mask
;
9715 if (rsize
< TARGET_PAGE_BITS
) {
9716 *page_size
= 1 << rsize
;
9721 if (n
== -1) { /* no hits */
9722 if (!pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
9723 /* background fault */
9724 fi
->type
= ARMFault_Background
;
9727 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
9728 } else { /* a MPU hit! */
9729 uint32_t ap
= extract32(env
->pmsav7
.dracr
[n
], 8, 3);
9730 uint32_t xn
= extract32(env
->pmsav7
.dracr
[n
], 12, 1);
9732 if (m_is_system_region(env
, address
)) {
9733 /* System space is always execute never */
9737 if (is_user
) { /* User mode AP bit decoding */
9742 break; /* no access */
9744 *prot
|= PAGE_WRITE
;
9748 *prot
|= PAGE_READ
| PAGE_EXEC
;
9751 /* for v7M, same as 6; for R profile a reserved value */
9752 if (arm_feature(env
, ARM_FEATURE_M
)) {
9753 *prot
|= PAGE_READ
| PAGE_EXEC
;
9758 qemu_log_mask(LOG_GUEST_ERROR
,
9759 "DRACR[%d]: Bad value for AP bits: 0x%"
9760 PRIx32
"\n", n
, ap
);
9762 } else { /* Priv. mode AP bits decoding */
9765 break; /* no access */
9769 *prot
|= PAGE_WRITE
;
9773 *prot
|= PAGE_READ
| PAGE_EXEC
;
9776 /* for v7M, same as 6; for R profile a reserved value */
9777 if (arm_feature(env
, ARM_FEATURE_M
)) {
9778 *prot
|= PAGE_READ
| PAGE_EXEC
;
9783 qemu_log_mask(LOG_GUEST_ERROR
,
9784 "DRACR[%d]: Bad value for AP bits: 0x%"
9785 PRIx32
"\n", n
, ap
);
9791 *prot
&= ~PAGE_EXEC
;
9796 fi
->type
= ARMFault_Permission
;
9799 * Core QEMU code can't handle execution from small pages yet, so
9800 * don't try it. This way we'll get an MPU exception, rather than
9801 * eventually causing QEMU to exit in get_page_addr_code().
9803 if (*page_size
< TARGET_PAGE_SIZE
&& (*prot
& PAGE_EXEC
)) {
9804 qemu_log_mask(LOG_UNIMP
,
9805 "MPU: No support for execution from regions "
9806 "smaller than 1K\n");
9807 *prot
&= ~PAGE_EXEC
;
9809 return !(*prot
& (1 << access_type
));
9812 static bool v8m_is_sau_exempt(CPUARMState
*env
,
9813 uint32_t address
, MMUAccessType access_type
)
9815 /* The architecture specifies that certain address ranges are
9816 * exempt from v8M SAU/IDAU checks.
9819 (access_type
== MMU_INST_FETCH
&& m_is_system_region(env
, address
)) ||
9820 (address
>= 0xe0000000 && address
<= 0xe0002fff) ||
9821 (address
>= 0xe000e000 && address
<= 0xe000efff) ||
9822 (address
>= 0xe002e000 && address
<= 0xe002efff) ||
9823 (address
>= 0xe0040000 && address
<= 0xe0041fff) ||
9824 (address
>= 0xe00ff000 && address
<= 0xe00fffff);
9827 static void v8m_security_lookup(CPUARMState
*env
, uint32_t address
,
9828 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9829 V8M_SAttributes
*sattrs
)
9831 /* Look up the security attributes for this address. Compare the
9832 * pseudocode SecurityCheck() function.
9833 * We assume the caller has zero-initialized *sattrs.
9835 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9837 bool idau_exempt
= false, idau_ns
= true, idau_nsc
= true;
9838 int idau_region
= IREGION_NOTVALID
;
9839 uint32_t addr_page_base
= address
& TARGET_PAGE_MASK
;
9840 uint32_t addr_page_limit
= addr_page_base
+ (TARGET_PAGE_SIZE
- 1);
9843 IDAUInterfaceClass
*iic
= IDAU_INTERFACE_GET_CLASS(cpu
->idau
);
9844 IDAUInterface
*ii
= IDAU_INTERFACE(cpu
->idau
);
9846 iic
->check(ii
, address
, &idau_region
, &idau_exempt
, &idau_ns
,
9850 if (access_type
== MMU_INST_FETCH
&& extract32(address
, 28, 4) == 0xf) {
9851 /* 0xf0000000..0xffffffff is always S for insn fetches */
9855 if (idau_exempt
|| v8m_is_sau_exempt(env
, address
, access_type
)) {
9856 sattrs
->ns
= !regime_is_secure(env
, mmu_idx
);
9860 if (idau_region
!= IREGION_NOTVALID
) {
9861 sattrs
->irvalid
= true;
9862 sattrs
->iregion
= idau_region
;
9865 switch (env
->sau
.ctrl
& 3) {
9866 case 0: /* SAU.ENABLE == 0, SAU.ALLNS == 0 */
9868 case 2: /* SAU.ENABLE == 0, SAU.ALLNS == 1 */
9871 default: /* SAU.ENABLE == 1 */
9872 for (r
= 0; r
< cpu
->sau_sregion
; r
++) {
9873 if (env
->sau
.rlar
[r
] & 1) {
9874 uint32_t base
= env
->sau
.rbar
[r
] & ~0x1f;
9875 uint32_t limit
= env
->sau
.rlar
[r
] | 0x1f;
9877 if (base
<= address
&& limit
>= address
) {
9878 if (base
> addr_page_base
|| limit
< addr_page_limit
) {
9879 sattrs
->subpage
= true;
9881 if (sattrs
->srvalid
) {
9882 /* If we hit in more than one region then we must report
9883 * as Secure, not NS-Callable, with no valid region
9887 sattrs
->nsc
= false;
9888 sattrs
->sregion
= 0;
9889 sattrs
->srvalid
= false;
9892 if (env
->sau
.rlar
[r
] & 2) {
9897 sattrs
->srvalid
= true;
9898 sattrs
->sregion
= r
;
9902 * Address not in this region. We must check whether the
9903 * region covers addresses in the same page as our address.
9904 * In that case we must not report a size that covers the
9905 * whole page for a subsequent hit against a different MPU
9906 * region or the background region, because it would result
9907 * in incorrect TLB hits for subsequent accesses to
9908 * addresses that are in this MPU region.
9910 if (limit
>= base
&&
9911 ranges_overlap(base
, limit
- base
+ 1,
9913 TARGET_PAGE_SIZE
)) {
9914 sattrs
->subpage
= true;
9920 /* The IDAU will override the SAU lookup results if it specifies
9921 * higher security than the SAU does.
9924 if (sattrs
->ns
|| (!idau_nsc
&& sattrs
->nsc
)) {
9926 sattrs
->nsc
= idau_nsc
;
9933 static bool pmsav8_mpu_lookup(CPUARMState
*env
, uint32_t address
,
9934 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
9935 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
,
9936 int *prot
, bool *is_subpage
,
9937 ARMMMUFaultInfo
*fi
, uint32_t *mregion
)
9939 /* Perform a PMSAv8 MPU lookup (without also doing the SAU check
9940 * that a full phys-to-virt translation does).
9941 * mregion is (if not NULL) set to the region number which matched,
9942 * or -1 if no region number is returned (MPU off, address did not
9943 * hit a region, address hit in multiple regions).
9944 * We set is_subpage to true if the region hit doesn't cover the
9945 * entire TARGET_PAGE the address is within.
9947 ARMCPU
*cpu
= arm_env_get_cpu(env
);
9948 bool is_user
= regime_is_user(env
, mmu_idx
);
9949 uint32_t secure
= regime_is_secure(env
, mmu_idx
);
9951 int matchregion
= -1;
9953 uint32_t addr_page_base
= address
& TARGET_PAGE_MASK
;
9954 uint32_t addr_page_limit
= addr_page_base
+ (TARGET_PAGE_SIZE
- 1);
9956 *is_subpage
= false;
9957 *phys_ptr
= address
;
9963 /* Unlike the ARM ARM pseudocode, we don't need to check whether this
9964 * was an exception vector read from the vector table (which is always
9965 * done using the default system address map), because those accesses
9966 * are done in arm_v7m_load_vector(), which always does a direct
9967 * read using address_space_ldl(), rather than going via this function.
9969 if (regime_translation_disabled(env
, mmu_idx
)) { /* MPU disabled */
9971 } else if (m_is_ppb_region(env
, address
)) {
9973 } else if (pmsav7_use_background_region(cpu
, mmu_idx
, is_user
)) {
9976 for (n
= (int)cpu
->pmsav7_dregion
- 1; n
>= 0; n
--) {
9978 /* Note that the base address is bits [31:5] from the register
9979 * with bits [4:0] all zeroes, but the limit address is bits
9980 * [31:5] from the register with bits [4:0] all ones.
9982 uint32_t base
= env
->pmsav8
.rbar
[secure
][n
] & ~0x1f;
9983 uint32_t limit
= env
->pmsav8
.rlar
[secure
][n
] | 0x1f;
9985 if (!(env
->pmsav8
.rlar
[secure
][n
] & 0x1)) {
9986 /* Region disabled */
9990 if (address
< base
|| address
> limit
) {
9992 * Address not in this region. We must check whether the
9993 * region covers addresses in the same page as our address.
9994 * In that case we must not report a size that covers the
9995 * whole page for a subsequent hit against a different MPU
9996 * region or the background region, because it would result in
9997 * incorrect TLB hits for subsequent accesses to addresses that
9998 * are in this MPU region.
10000 if (limit
>= base
&&
10001 ranges_overlap(base
, limit
- base
+ 1,
10003 TARGET_PAGE_SIZE
)) {
10004 *is_subpage
= true;
10009 if (base
> addr_page_base
|| limit
< addr_page_limit
) {
10010 *is_subpage
= true;
10014 /* Multiple regions match -- always a failure (unlike
10015 * PMSAv7 where highest-numbered-region wins)
10017 fi
->type
= ARMFault_Permission
;
10028 /* background fault */
10029 fi
->type
= ARMFault_Background
;
10033 if (matchregion
== -1) {
10034 /* hit using the background region */
10035 get_phys_addr_pmsav7_default(env
, mmu_idx
, address
, prot
);
10037 uint32_t ap
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 1, 2);
10038 uint32_t xn
= extract32(env
->pmsav8
.rbar
[secure
][matchregion
], 0, 1);
10040 if (m_is_system_region(env
, address
)) {
10041 /* System space is always execute never */
10045 *prot
= simple_ap_to_rw_prot(env
, mmu_idx
, ap
);
10046 if (*prot
&& !xn
) {
10047 *prot
|= PAGE_EXEC
;
10049 /* We don't need to look the attribute up in the MAIR0/MAIR1
10050 * registers because that only tells us about cacheability.
10053 *mregion
= matchregion
;
10057 fi
->type
= ARMFault_Permission
;
10060 * Core QEMU code can't handle execution from small pages yet, so
10061 * don't try it. This means any attempted execution will generate
10062 * an MPU exception, rather than eventually causing QEMU to exit in
10063 * get_page_addr_code().
10065 if (*is_subpage
&& (*prot
& PAGE_EXEC
)) {
10066 qemu_log_mask(LOG_UNIMP
,
10067 "MPU: No support for execution from regions "
10068 "smaller than 1K\n");
10069 *prot
&= ~PAGE_EXEC
;
10071 return !(*prot
& (1 << access_type
));
10075 static bool get_phys_addr_pmsav8(CPUARMState
*env
, uint32_t address
,
10076 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
10077 hwaddr
*phys_ptr
, MemTxAttrs
*txattrs
,
10078 int *prot
, target_ulong
*page_size
,
10079 ARMMMUFaultInfo
*fi
)
10081 uint32_t secure
= regime_is_secure(env
, mmu_idx
);
10082 V8M_SAttributes sattrs
= {};
10084 bool mpu_is_subpage
;
10086 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
10087 v8m_security_lookup(env
, address
, access_type
, mmu_idx
, &sattrs
);
10088 if (access_type
== MMU_INST_FETCH
) {
10089 /* Instruction fetches always use the MMU bank and the
10090 * transaction attribute determined by the fetch address,
10091 * regardless of CPU state. This is painful for QEMU
10092 * to handle, because it would mean we need to encode
10093 * into the mmu_idx not just the (user, negpri) information
10094 * for the current security state but also that for the
10095 * other security state, which would balloon the number
10096 * of mmu_idx values needed alarmingly.
10097 * Fortunately we can avoid this because it's not actually
10098 * possible to arbitrarily execute code from memory with
10099 * the wrong security attribute: it will always generate
10100 * an exception of some kind or another, apart from the
10101 * special case of an NS CPU executing an SG instruction
10102 * in S&NSC memory. So we always just fail the translation
10103 * here and sort things out in the exception handler
10104 * (including possibly emulating an SG instruction).
10106 if (sattrs
.ns
!= !secure
) {
10108 fi
->type
= ARMFault_QEMU_NSCExec
;
10110 fi
->type
= ARMFault_QEMU_SFault
;
10112 *page_size
= sattrs
.subpage
? 1 : TARGET_PAGE_SIZE
;
10113 *phys_ptr
= address
;
10118 /* For data accesses we always use the MMU bank indicated
10119 * by the current CPU state, but the security attributes
10120 * might downgrade a secure access to nonsecure.
10123 txattrs
->secure
= false;
10124 } else if (!secure
) {
10125 /* NS access to S memory must fault.
10126 * Architecturally we should first check whether the
10127 * MPU information for this address indicates that we
10128 * are doing an unaligned access to Device memory, which
10129 * should generate a UsageFault instead. QEMU does not
10130 * currently check for that kind of unaligned access though.
10131 * If we added it we would need to do so as a special case
10132 * for M_FAKE_FSR_SFAULT in arm_v7m_cpu_do_interrupt().
10134 fi
->type
= ARMFault_QEMU_SFault
;
10135 *page_size
= sattrs
.subpage
? 1 : TARGET_PAGE_SIZE
;
10136 *phys_ptr
= address
;
10143 ret
= pmsav8_mpu_lookup(env
, address
, access_type
, mmu_idx
, phys_ptr
,
10144 txattrs
, prot
, &mpu_is_subpage
, fi
, NULL
);
10146 * TODO: this is a temporary hack to ignore the fact that the SAU region
10147 * is smaller than a page if this is an executable region. We never
10148 * supported small MPU regions, but we did (accidentally) allow small
10149 * SAU regions, and if we now made small SAU regions not be executable
10150 * then this would break previously working guest code. We can't
10151 * remove this until/unless we implement support for execution from
10154 if (*prot
& PAGE_EXEC
) {
10155 sattrs
.subpage
= false;
10157 *page_size
= sattrs
.subpage
|| mpu_is_subpage
? 1 : TARGET_PAGE_SIZE
;
10161 static bool get_phys_addr_pmsav5(CPUARMState
*env
, uint32_t address
,
10162 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
10163 hwaddr
*phys_ptr
, int *prot
,
10164 ARMMMUFaultInfo
*fi
)
10169 bool is_user
= regime_is_user(env
, mmu_idx
);
10171 if (regime_translation_disabled(env
, mmu_idx
)) {
10172 /* MPU disabled. */
10173 *phys_ptr
= address
;
10174 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
10178 *phys_ptr
= address
;
10179 for (n
= 7; n
>= 0; n
--) {
10180 base
= env
->cp15
.c6_region
[n
];
10181 if ((base
& 1) == 0) {
10184 mask
= 1 << ((base
>> 1) & 0x1f);
10185 /* Keep this shift separate from the above to avoid an
10186 (undefined) << 32. */
10187 mask
= (mask
<< 1) - 1;
10188 if (((base
^ address
) & ~mask
) == 0) {
10193 fi
->type
= ARMFault_Background
;
10197 if (access_type
== MMU_INST_FETCH
) {
10198 mask
= env
->cp15
.pmsav5_insn_ap
;
10200 mask
= env
->cp15
.pmsav5_data_ap
;
10202 mask
= (mask
>> (n
* 4)) & 0xf;
10205 fi
->type
= ARMFault_Permission
;
10210 fi
->type
= ARMFault_Permission
;
10214 *prot
= PAGE_READ
| PAGE_WRITE
;
10219 *prot
|= PAGE_WRITE
;
10223 *prot
= PAGE_READ
| PAGE_WRITE
;
10227 fi
->type
= ARMFault_Permission
;
10237 /* Bad permission. */
10238 fi
->type
= ARMFault_Permission
;
10242 *prot
|= PAGE_EXEC
;
10246 /* Combine either inner or outer cacheability attributes for normal
10247 * memory, according to table D4-42 and pseudocode procedure
10248 * CombineS1S2AttrHints() of ARM DDI 0487B.b (the ARMv8 ARM).
10250 * NB: only stage 1 includes allocation hints (RW bits), leading to
10253 static uint8_t combine_cacheattr_nibble(uint8_t s1
, uint8_t s2
)
10255 if (s1
== 4 || s2
== 4) {
10256 /* non-cacheable has precedence */
10258 } else if (extract32(s1
, 2, 2) == 0 || extract32(s1
, 2, 2) == 2) {
10259 /* stage 1 write-through takes precedence */
10261 } else if (extract32(s2
, 2, 2) == 2) {
10262 /* stage 2 write-through takes precedence, but the allocation hint
10263 * is still taken from stage 1
10265 return (2 << 2) | extract32(s1
, 0, 2);
10266 } else { /* write-back */
10271 /* Combine S1 and S2 cacheability/shareability attributes, per D4.5.4
10272 * and CombineS1S2Desc()
10274 * @s1: Attributes from stage 1 walk
10275 * @s2: Attributes from stage 2 walk
10277 static ARMCacheAttrs
combine_cacheattrs(ARMCacheAttrs s1
, ARMCacheAttrs s2
)
10279 uint8_t s1lo
= extract32(s1
.attrs
, 0, 4), s2lo
= extract32(s2
.attrs
, 0, 4);
10280 uint8_t s1hi
= extract32(s1
.attrs
, 4, 4), s2hi
= extract32(s2
.attrs
, 4, 4);
10283 /* Combine shareability attributes (table D4-43) */
10284 if (s1
.shareability
== 2 || s2
.shareability
== 2) {
10285 /* if either are outer-shareable, the result is outer-shareable */
10286 ret
.shareability
= 2;
10287 } else if (s1
.shareability
== 3 || s2
.shareability
== 3) {
10288 /* if either are inner-shareable, the result is inner-shareable */
10289 ret
.shareability
= 3;
10291 /* both non-shareable */
10292 ret
.shareability
= 0;
10295 /* Combine memory type and cacheability attributes */
10296 if (s1hi
== 0 || s2hi
== 0) {
10297 /* Device has precedence over normal */
10298 if (s1lo
== 0 || s2lo
== 0) {
10299 /* nGnRnE has precedence over anything */
10301 } else if (s1lo
== 4 || s2lo
== 4) {
10302 /* non-Reordering has precedence over Reordering */
10303 ret
.attrs
= 4; /* nGnRE */
10304 } else if (s1lo
== 8 || s2lo
== 8) {
10305 /* non-Gathering has precedence over Gathering */
10306 ret
.attrs
= 8; /* nGRE */
10308 ret
.attrs
= 0xc; /* GRE */
10311 /* Any location for which the resultant memory type is any
10312 * type of Device memory is always treated as Outer Shareable.
10314 ret
.shareability
= 2;
10315 } else { /* Normal memory */
10316 /* Outer/inner cacheability combine independently */
10317 ret
.attrs
= combine_cacheattr_nibble(s1hi
, s2hi
) << 4
10318 | combine_cacheattr_nibble(s1lo
, s2lo
);
10320 if (ret
.attrs
== 0x44) {
10321 /* Any location for which the resultant memory type is Normal
10322 * Inner Non-cacheable, Outer Non-cacheable is always treated
10323 * as Outer Shareable.
10325 ret
.shareability
= 2;
10333 /* get_phys_addr - get the physical address for this virtual address
10335 * Find the physical address corresponding to the given virtual address,
10336 * by doing a translation table walk on MMU based systems or using the
10337 * MPU state on MPU based systems.
10339 * Returns false if the translation was successful. Otherwise, phys_ptr, attrs,
10340 * prot and page_size may not be filled in, and the populated fsr value provides
10341 * information on why the translation aborted, in the format of a
10342 * DFSR/IFSR fault register, with the following caveats:
10343 * * we honour the short vs long DFSR format differences.
10344 * * the WnR bit is never set (the caller must do this).
10345 * * for PSMAv5 based systems we don't bother to return a full FSR format
10348 * @env: CPUARMState
10349 * @address: virtual address to get physical address for
10350 * @access_type: 0 for read, 1 for write, 2 for execute
10351 * @mmu_idx: MMU index indicating required translation regime
10352 * @phys_ptr: set to the physical address corresponding to the virtual address
10353 * @attrs: set to the memory transaction attributes to use
10354 * @prot: set to the permissions for the page containing phys_ptr
10355 * @page_size: set to the size of the page containing phys_ptr
10356 * @fi: set to fault info if the translation fails
10357 * @cacheattrs: (if non-NULL) set to the cacheability/shareability attributes
10359 static bool get_phys_addr(CPUARMState
*env
, target_ulong address
,
10360 MMUAccessType access_type
, ARMMMUIdx mmu_idx
,
10361 hwaddr
*phys_ptr
, MemTxAttrs
*attrs
, int *prot
,
10362 target_ulong
*page_size
,
10363 ARMMMUFaultInfo
*fi
, ARMCacheAttrs
*cacheattrs
)
10365 if (mmu_idx
== ARMMMUIdx_S12NSE0
|| mmu_idx
== ARMMMUIdx_S12NSE1
) {
10366 /* Call ourselves recursively to do the stage 1 and then stage 2
10369 if (arm_feature(env
, ARM_FEATURE_EL2
)) {
10373 ARMCacheAttrs cacheattrs2
= {};
10375 ret
= get_phys_addr(env
, address
, access_type
,
10376 stage_1_mmu_idx(mmu_idx
), &ipa
, attrs
,
10377 prot
, page_size
, fi
, cacheattrs
);
10379 /* If S1 fails or S2 is disabled, return early. */
10380 if (ret
|| regime_translation_disabled(env
, ARMMMUIdx_S2NS
)) {
10385 /* S1 is done. Now do S2 translation. */
10386 ret
= get_phys_addr_lpae(env
, ipa
, access_type
, ARMMMUIdx_S2NS
,
10387 phys_ptr
, attrs
, &s2_prot
,
10389 cacheattrs
!= NULL
? &cacheattrs2
: NULL
);
10391 /* Combine the S1 and S2 perms. */
10394 /* Combine the S1 and S2 cache attributes, if needed */
10395 if (!ret
&& cacheattrs
!= NULL
) {
10396 *cacheattrs
= combine_cacheattrs(*cacheattrs
, cacheattrs2
);
10402 * For non-EL2 CPUs a stage1+stage2 translation is just stage 1.
10404 mmu_idx
= stage_1_mmu_idx(mmu_idx
);
10408 /* The page table entries may downgrade secure to non-secure, but
10409 * cannot upgrade an non-secure translation regime's attributes
10412 attrs
->secure
= regime_is_secure(env
, mmu_idx
);
10413 attrs
->user
= regime_is_user(env
, mmu_idx
);
10415 /* Fast Context Switch Extension. This doesn't exist at all in v8.
10416 * In v7 and earlier it affects all stage 1 translations.
10418 if (address
< 0x02000000 && mmu_idx
!= ARMMMUIdx_S2NS
10419 && !arm_feature(env
, ARM_FEATURE_V8
)) {
10420 if (regime_el(env
, mmu_idx
) == 3) {
10421 address
+= env
->cp15
.fcseidr_s
;
10423 address
+= env
->cp15
.fcseidr_ns
;
10427 if (arm_feature(env
, ARM_FEATURE_PMSA
)) {
10429 *page_size
= TARGET_PAGE_SIZE
;
10431 if (arm_feature(env
, ARM_FEATURE_V8
)) {
10433 ret
= get_phys_addr_pmsav8(env
, address
, access_type
, mmu_idx
,
10434 phys_ptr
, attrs
, prot
, page_size
, fi
);
10435 } else if (arm_feature(env
, ARM_FEATURE_V7
)) {
10437 ret
= get_phys_addr_pmsav7(env
, address
, access_type
, mmu_idx
,
10438 phys_ptr
, prot
, page_size
, fi
);
10441 ret
= get_phys_addr_pmsav5(env
, address
, access_type
, mmu_idx
,
10442 phys_ptr
, prot
, fi
);
10444 qemu_log_mask(CPU_LOG_MMU
, "PMSA MPU lookup for %s at 0x%08" PRIx32
10445 " mmu_idx %u -> %s (prot %c%c%c)\n",
10446 access_type
== MMU_DATA_LOAD
? "reading" :
10447 (access_type
== MMU_DATA_STORE
? "writing" : "execute"),
10448 (uint32_t)address
, mmu_idx
,
10449 ret
? "Miss" : "Hit",
10450 *prot
& PAGE_READ
? 'r' : '-',
10451 *prot
& PAGE_WRITE
? 'w' : '-',
10452 *prot
& PAGE_EXEC
? 'x' : '-');
10457 /* Definitely a real MMU, not an MPU */
10459 if (regime_translation_disabled(env
, mmu_idx
)) {
10460 /* MMU disabled. */
10461 *phys_ptr
= address
;
10462 *prot
= PAGE_READ
| PAGE_WRITE
| PAGE_EXEC
;
10463 *page_size
= TARGET_PAGE_SIZE
;
10467 if (regime_using_lpae_format(env
, mmu_idx
)) {
10468 return get_phys_addr_lpae(env
, address
, access_type
, mmu_idx
,
10469 phys_ptr
, attrs
, prot
, page_size
,
10471 } else if (regime_sctlr(env
, mmu_idx
) & SCTLR_XP
) {
10472 return get_phys_addr_v6(env
, address
, access_type
, mmu_idx
,
10473 phys_ptr
, attrs
, prot
, page_size
, fi
);
10475 return get_phys_addr_v5(env
, address
, access_type
, mmu_idx
,
10476 phys_ptr
, prot
, page_size
, fi
);
10480 /* Walk the page table and (if the mapping exists) add the page
10481 * to the TLB. Return false on success, or true on failure. Populate
10482 * fsr with ARM DFSR/IFSR fault register format value on failure.
10484 bool arm_tlb_fill(CPUState
*cs
, vaddr address
,
10485 MMUAccessType access_type
, int mmu_idx
,
10486 ARMMMUFaultInfo
*fi
)
10488 ARMCPU
*cpu
= ARM_CPU(cs
);
10489 CPUARMState
*env
= &cpu
->env
;
10491 target_ulong page_size
;
10494 MemTxAttrs attrs
= {};
10496 ret
= get_phys_addr(env
, address
, access_type
,
10497 core_to_arm_mmu_idx(env
, mmu_idx
), &phys_addr
,
10498 &attrs
, &prot
, &page_size
, fi
, NULL
);
10501 * Map a single [sub]page. Regions smaller than our declared
10502 * target page size are handled specially, so for those we
10503 * pass in the exact addresses.
10505 if (page_size
>= TARGET_PAGE_SIZE
) {
10506 phys_addr
&= TARGET_PAGE_MASK
;
10507 address
&= TARGET_PAGE_MASK
;
10509 tlb_set_page_with_attrs(cs
, address
, phys_addr
, attrs
,
10510 prot
, mmu_idx
, page_size
);
10517 hwaddr
arm_cpu_get_phys_page_attrs_debug(CPUState
*cs
, vaddr addr
,
10520 ARMCPU
*cpu
= ARM_CPU(cs
);
10521 CPUARMState
*env
= &cpu
->env
;
10523 target_ulong page_size
;
10526 ARMMMUFaultInfo fi
= {};
10527 ARMMMUIdx mmu_idx
= core_to_arm_mmu_idx(env
, cpu_mmu_index(env
, false));
10529 *attrs
= (MemTxAttrs
) {};
10531 ret
= get_phys_addr(env
, addr
, 0, mmu_idx
, &phys_addr
,
10532 attrs
, &prot
, &page_size
, &fi
, NULL
);
10540 uint32_t HELPER(v7m_mrs
)(CPUARMState
*env
, uint32_t reg
)
10543 unsigned el
= arm_current_el(env
);
10545 /* First handle registers which unprivileged can read */
10548 case 0 ... 7: /* xPSR sub-fields */
10550 if ((reg
& 1) && el
) {
10551 mask
|= XPSR_EXCP
; /* IPSR (unpriv. reads as zero) */
10554 mask
|= XPSR_NZCV
| XPSR_Q
; /* APSR */
10556 /* EPSR reads as zero */
10557 return xpsr_read(env
) & mask
;
10559 case 20: /* CONTROL */
10560 return env
->v7m
.control
[env
->v7m
.secure
];
10561 case 0x94: /* CONTROL_NS */
10562 /* We have to handle this here because unprivileged Secure code
10563 * can read the NS CONTROL register.
10565 if (!env
->v7m
.secure
) {
10568 return env
->v7m
.control
[M_REG_NS
];
10572 return 0; /* unprivileged reads others as zero */
10575 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
10577 case 0x88: /* MSP_NS */
10578 if (!env
->v7m
.secure
) {
10581 return env
->v7m
.other_ss_msp
;
10582 case 0x89: /* PSP_NS */
10583 if (!env
->v7m
.secure
) {
10586 return env
->v7m
.other_ss_psp
;
10587 case 0x8a: /* MSPLIM_NS */
10588 if (!env
->v7m
.secure
) {
10591 return env
->v7m
.msplim
[M_REG_NS
];
10592 case 0x8b: /* PSPLIM_NS */
10593 if (!env
->v7m
.secure
) {
10596 return env
->v7m
.psplim
[M_REG_NS
];
10597 case 0x90: /* PRIMASK_NS */
10598 if (!env
->v7m
.secure
) {
10601 return env
->v7m
.primask
[M_REG_NS
];
10602 case 0x91: /* BASEPRI_NS */
10603 if (!env
->v7m
.secure
) {
10606 return env
->v7m
.basepri
[M_REG_NS
];
10607 case 0x93: /* FAULTMASK_NS */
10608 if (!env
->v7m
.secure
) {
10611 return env
->v7m
.faultmask
[M_REG_NS
];
10612 case 0x98: /* SP_NS */
10614 /* This gives the non-secure SP selected based on whether we're
10615 * currently in handler mode or not, using the NS CONTROL.SPSEL.
10617 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
10619 if (!env
->v7m
.secure
) {
10622 if (!arm_v7m_is_handler_mode(env
) && spsel
) {
10623 return env
->v7m
.other_ss_psp
;
10625 return env
->v7m
.other_ss_msp
;
10635 return v7m_using_psp(env
) ? env
->v7m
.other_sp
: env
->regs
[13];
10637 return v7m_using_psp(env
) ? env
->regs
[13] : env
->v7m
.other_sp
;
10638 case 10: /* MSPLIM */
10639 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
10642 return env
->v7m
.msplim
[env
->v7m
.secure
];
10643 case 11: /* PSPLIM */
10644 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
10647 return env
->v7m
.psplim
[env
->v7m
.secure
];
10648 case 16: /* PRIMASK */
10649 return env
->v7m
.primask
[env
->v7m
.secure
];
10650 case 17: /* BASEPRI */
10651 case 18: /* BASEPRI_MAX */
10652 return env
->v7m
.basepri
[env
->v7m
.secure
];
10653 case 19: /* FAULTMASK */
10654 return env
->v7m
.faultmask
[env
->v7m
.secure
];
10657 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to read unknown special"
10658 " register %d\n", reg
);
10663 void HELPER(v7m_msr
)(CPUARMState
*env
, uint32_t maskreg
, uint32_t val
)
10665 /* We're passed bits [11..0] of the instruction; extract
10666 * SYSm and the mask bits.
10667 * Invalid combinations of SYSm and mask are UNPREDICTABLE;
10668 * we choose to treat them as if the mask bits were valid.
10669 * NB that the pseudocode 'mask' variable is bits [11..10],
10670 * whereas ours is [11..8].
10672 uint32_t mask
= extract32(maskreg
, 8, 4);
10673 uint32_t reg
= extract32(maskreg
, 0, 8);
10675 if (arm_current_el(env
) == 0 && reg
> 7) {
10676 /* only xPSR sub-fields may be written by unprivileged */
10680 if (arm_feature(env
, ARM_FEATURE_M_SECURITY
)) {
10682 case 0x88: /* MSP_NS */
10683 if (!env
->v7m
.secure
) {
10686 env
->v7m
.other_ss_msp
= val
;
10688 case 0x89: /* PSP_NS */
10689 if (!env
->v7m
.secure
) {
10692 env
->v7m
.other_ss_psp
= val
;
10694 case 0x8a: /* MSPLIM_NS */
10695 if (!env
->v7m
.secure
) {
10698 env
->v7m
.msplim
[M_REG_NS
] = val
& ~7;
10700 case 0x8b: /* PSPLIM_NS */
10701 if (!env
->v7m
.secure
) {
10704 env
->v7m
.psplim
[M_REG_NS
] = val
& ~7;
10706 case 0x90: /* PRIMASK_NS */
10707 if (!env
->v7m
.secure
) {
10710 env
->v7m
.primask
[M_REG_NS
] = val
& 1;
10712 case 0x91: /* BASEPRI_NS */
10713 if (!env
->v7m
.secure
) {
10716 env
->v7m
.basepri
[M_REG_NS
] = val
& 0xff;
10718 case 0x93: /* FAULTMASK_NS */
10719 if (!env
->v7m
.secure
) {
10722 env
->v7m
.faultmask
[M_REG_NS
] = val
& 1;
10724 case 0x94: /* CONTROL_NS */
10725 if (!env
->v7m
.secure
) {
10728 write_v7m_control_spsel_for_secstate(env
,
10729 val
& R_V7M_CONTROL_SPSEL_MASK
,
10731 env
->v7m
.control
[M_REG_NS
] &= ~R_V7M_CONTROL_NPRIV_MASK
;
10732 env
->v7m
.control
[M_REG_NS
] |= val
& R_V7M_CONTROL_NPRIV_MASK
;
10734 case 0x98: /* SP_NS */
10736 /* This gives the non-secure SP selected based on whether we're
10737 * currently in handler mode or not, using the NS CONTROL.SPSEL.
10739 bool spsel
= env
->v7m
.control
[M_REG_NS
] & R_V7M_CONTROL_SPSEL_MASK
;
10741 if (!env
->v7m
.secure
) {
10744 if (!arm_v7m_is_handler_mode(env
) && spsel
) {
10745 env
->v7m
.other_ss_psp
= val
;
10747 env
->v7m
.other_ss_msp
= val
;
10757 case 0 ... 7: /* xPSR sub-fields */
10758 /* only APSR is actually writable */
10760 uint32_t apsrmask
= 0;
10763 apsrmask
|= XPSR_NZCV
| XPSR_Q
;
10765 if ((mask
& 4) && arm_feature(env
, ARM_FEATURE_THUMB_DSP
)) {
10766 apsrmask
|= XPSR_GE
;
10768 xpsr_write(env
, val
, apsrmask
);
10772 if (v7m_using_psp(env
)) {
10773 env
->v7m
.other_sp
= val
;
10775 env
->regs
[13] = val
;
10779 if (v7m_using_psp(env
)) {
10780 env
->regs
[13] = val
;
10782 env
->v7m
.other_sp
= val
;
10785 case 10: /* MSPLIM */
10786 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
10789 env
->v7m
.msplim
[env
->v7m
.secure
] = val
& ~7;
10791 case 11: /* PSPLIM */
10792 if (!arm_feature(env
, ARM_FEATURE_V8
)) {
10795 env
->v7m
.psplim
[env
->v7m
.secure
] = val
& ~7;
10797 case 16: /* PRIMASK */
10798 env
->v7m
.primask
[env
->v7m
.secure
] = val
& 1;
10800 case 17: /* BASEPRI */
10801 env
->v7m
.basepri
[env
->v7m
.secure
] = val
& 0xff;
10803 case 18: /* BASEPRI_MAX */
10805 if (val
!= 0 && (val
< env
->v7m
.basepri
[env
->v7m
.secure
]
10806 || env
->v7m
.basepri
[env
->v7m
.secure
] == 0)) {
10807 env
->v7m
.basepri
[env
->v7m
.secure
] = val
;
10810 case 19: /* FAULTMASK */
10811 env
->v7m
.faultmask
[env
->v7m
.secure
] = val
& 1;
10813 case 20: /* CONTROL */
10814 /* Writing to the SPSEL bit only has an effect if we are in
10815 * thread mode; other bits can be updated by any privileged code.
10816 * write_v7m_control_spsel() deals with updating the SPSEL bit in
10817 * env->v7m.control, so we only need update the others.
10818 * For v7M, we must just ignore explicit writes to SPSEL in handler
10819 * mode; for v8M the write is permitted but will have no effect.
10821 if (arm_feature(env
, ARM_FEATURE_V8
) ||
10822 !arm_v7m_is_handler_mode(env
)) {
10823 write_v7m_control_spsel(env
, (val
& R_V7M_CONTROL_SPSEL_MASK
) != 0);
10825 env
->v7m
.control
[env
->v7m
.secure
] &= ~R_V7M_CONTROL_NPRIV_MASK
;
10826 env
->v7m
.control
[env
->v7m
.secure
] |= val
& R_V7M_CONTROL_NPRIV_MASK
;
10830 qemu_log_mask(LOG_GUEST_ERROR
, "Attempt to write unknown special"
10831 " register %d\n", reg
);
10836 uint32_t HELPER(v7m_tt
)(CPUARMState
*env
, uint32_t addr
, uint32_t op
)
10838 /* Implement the TT instruction. op is bits [7:6] of the insn. */
10839 bool forceunpriv
= op
& 1;
10841 V8M_SAttributes sattrs
= {};
10843 bool r
, rw
, nsr
, nsrw
, mrvalid
;
10845 ARMMMUFaultInfo fi
= {};
10846 MemTxAttrs attrs
= {};
10851 bool targetsec
= env
->v7m
.secure
;
10854 /* Work out what the security state and privilege level we're
10855 * interested in is...
10858 targetsec
= !targetsec
;
10862 targetpriv
= false;
10864 targetpriv
= arm_v7m_is_handler_mode(env
) ||
10865 !(env
->v7m
.control
[targetsec
] & R_V7M_CONTROL_NPRIV_MASK
);
10868 /* ...and then figure out which MMU index this is */
10869 mmu_idx
= arm_v7m_mmu_idx_for_secstate_and_priv(env
, targetsec
, targetpriv
);
10871 /* We know that the MPU and SAU don't care about the access type
10872 * for our purposes beyond that we don't want to claim to be
10873 * an insn fetch, so we arbitrarily call this a read.
10876 /* MPU region info only available for privileged or if
10877 * inspecting the other MPU state.
10879 if (arm_current_el(env
) != 0 || alt
) {
10880 /* We can ignore the return value as prot is always set */
10881 pmsav8_mpu_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
,
10882 &phys_addr
, &attrs
, &prot
, &is_subpage
,
10884 if (mregion
== -1) {
10890 r
= prot
& PAGE_READ
;
10891 rw
= prot
& PAGE_WRITE
;
10899 if (env
->v7m
.secure
) {
10900 v8m_security_lookup(env
, addr
, MMU_DATA_LOAD
, mmu_idx
, &sattrs
);
10901 nsr
= sattrs
.ns
&& r
;
10902 nsrw
= sattrs
.ns
&& rw
;
10909 tt_resp
= (sattrs
.iregion
<< 24) |
10910 (sattrs
.irvalid
<< 23) |
10911 ((!sattrs
.ns
) << 22) |
10916 (sattrs
.srvalid
<< 17) |
10918 (sattrs
.sregion
<< 8) |
10926 void HELPER(dc_zva
)(CPUARMState
*env
, uint64_t vaddr_in
)
10928 /* Implement DC ZVA, which zeroes a fixed-length block of memory.
10929 * Note that we do not implement the (architecturally mandated)
10930 * alignment fault for attempts to use this on Device memory
10931 * (which matches the usual QEMU behaviour of not implementing either
10932 * alignment faults or any memory attribute handling).
10935 ARMCPU
*cpu
= arm_env_get_cpu(env
);
10936 uint64_t blocklen
= 4 << cpu
->dcz_blocksize
;
10937 uint64_t vaddr
= vaddr_in
& ~(blocklen
- 1);
10939 #ifndef CONFIG_USER_ONLY
10941 /* Slightly awkwardly, QEMU's TARGET_PAGE_SIZE may be less than
10942 * the block size so we might have to do more than one TLB lookup.
10943 * We know that in fact for any v8 CPU the page size is at least 4K
10944 * and the block size must be 2K or less, but TARGET_PAGE_SIZE is only
10945 * 1K as an artefact of legacy v5 subpage support being present in the
10946 * same QEMU executable.
10948 int maxidx
= DIV_ROUND_UP(blocklen
, TARGET_PAGE_SIZE
);
10949 void *hostaddr
[maxidx
];
10951 unsigned mmu_idx
= cpu_mmu_index(env
, false);
10952 TCGMemOpIdx oi
= make_memop_idx(MO_UB
, mmu_idx
);
10954 for (try = 0; try < 2; try++) {
10956 for (i
= 0; i
< maxidx
; i
++) {
10957 hostaddr
[i
] = tlb_vaddr_to_host(env
,
10958 vaddr
+ TARGET_PAGE_SIZE
* i
,
10960 if (!hostaddr
[i
]) {
10965 /* If it's all in the TLB it's fair game for just writing to;
10966 * we know we don't need to update dirty status, etc.
10968 for (i
= 0; i
< maxidx
- 1; i
++) {
10969 memset(hostaddr
[i
], 0, TARGET_PAGE_SIZE
);
10971 memset(hostaddr
[i
], 0, blocklen
- (i
* TARGET_PAGE_SIZE
));
10974 /* OK, try a store and see if we can populate the tlb. This
10975 * might cause an exception if the memory isn't writable,
10976 * in which case we will longjmp out of here. We must for
10977 * this purpose use the actual register value passed to us
10978 * so that we get the fault address right.
10980 helper_ret_stb_mmu(env
, vaddr_in
, 0, oi
, GETPC());
10981 /* Now we can populate the other TLB entries, if any */
10982 for (i
= 0; i
< maxidx
; i
++) {
10983 uint64_t va
= vaddr
+ TARGET_PAGE_SIZE
* i
;
10984 if (va
!= (vaddr_in
& TARGET_PAGE_MASK
)) {
10985 helper_ret_stb_mmu(env
, va
, 0, oi
, GETPC());
10990 /* Slow path (probably attempt to do this to an I/O device or
10991 * similar, or clearing of a block of code we have translations
10992 * cached for). Just do a series of byte writes as the architecture
10993 * demands. It's not worth trying to use a cpu_physical_memory_map(),
10994 * memset(), unmap() sequence here because:
10995 * + we'd need to account for the blocksize being larger than a page
10996 * + the direct-RAM access case is almost always going to be dealt
10997 * with in the fastpath code above, so there's no speed benefit
10998 * + we would have to deal with the map returning NULL because the
10999 * bounce buffer was in use
11001 for (i
= 0; i
< blocklen
; i
++) {
11002 helper_ret_stb_mmu(env
, vaddr
+ i
, 0, oi
, GETPC());
11006 memset(g2h(vaddr
), 0, blocklen
);
11010 /* Note that signed overflow is undefined in C. The following routines are
11011 careful to use unsigned types where modulo arithmetic is required.
11012 Failure to do so _will_ break on newer gcc. */
11014 /* Signed saturating arithmetic. */
11016 /* Perform 16-bit signed saturating addition. */
11017 static inline uint16_t add16_sat(uint16_t a
, uint16_t b
)
11022 if (((res
^ a
) & 0x8000) && !((a
^ b
) & 0x8000)) {
11031 /* Perform 8-bit signed saturating addition. */
11032 static inline uint8_t add8_sat(uint8_t a
, uint8_t b
)
11037 if (((res
^ a
) & 0x80) && !((a
^ b
) & 0x80)) {
11046 /* Perform 16-bit signed saturating subtraction. */
11047 static inline uint16_t sub16_sat(uint16_t a
, uint16_t b
)
11052 if (((res
^ a
) & 0x8000) && ((a
^ b
) & 0x8000)) {
11061 /* Perform 8-bit signed saturating subtraction. */
11062 static inline uint8_t sub8_sat(uint8_t a
, uint8_t b
)
11067 if (((res
^ a
) & 0x80) && ((a
^ b
) & 0x80)) {
11076 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
11077 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
11078 #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
11079 #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
11082 #include "op_addsub.h"
11084 /* Unsigned saturating arithmetic. */
11085 static inline uint16_t add16_usat(uint16_t a
, uint16_t b
)
11094 static inline uint16_t sub16_usat(uint16_t a
, uint16_t b
)
11102 static inline uint8_t add8_usat(uint8_t a
, uint8_t b
)
11111 static inline uint8_t sub8_usat(uint8_t a
, uint8_t b
)
11119 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
11120 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
11121 #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
11122 #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
11125 #include "op_addsub.h"
11127 /* Signed modulo arithmetic. */
11128 #define SARITH16(a, b, n, op) do { \
11130 sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
11131 RESULT(sum, n, 16); \
11133 ge |= 3 << (n * 2); \
11136 #define SARITH8(a, b, n, op) do { \
11138 sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
11139 RESULT(sum, n, 8); \
11145 #define ADD16(a, b, n) SARITH16(a, b, n, +)
11146 #define SUB16(a, b, n) SARITH16(a, b, n, -)
11147 #define ADD8(a, b, n) SARITH8(a, b, n, +)
11148 #define SUB8(a, b, n) SARITH8(a, b, n, -)
11152 #include "op_addsub.h"
11154 /* Unsigned modulo arithmetic. */
11155 #define ADD16(a, b, n) do { \
11157 sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
11158 RESULT(sum, n, 16); \
11159 if ((sum >> 16) == 1) \
11160 ge |= 3 << (n * 2); \
11163 #define ADD8(a, b, n) do { \
11165 sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
11166 RESULT(sum, n, 8); \
11167 if ((sum >> 8) == 1) \
11171 #define SUB16(a, b, n) do { \
11173 sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
11174 RESULT(sum, n, 16); \
11175 if ((sum >> 16) == 0) \
11176 ge |= 3 << (n * 2); \
11179 #define SUB8(a, b, n) do { \
11181 sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
11182 RESULT(sum, n, 8); \
11183 if ((sum >> 8) == 0) \
11190 #include "op_addsub.h"
11192 /* Halved signed arithmetic. */
11193 #define ADD16(a, b, n) \
11194 RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
11195 #define SUB16(a, b, n) \
11196 RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
11197 #define ADD8(a, b, n) \
11198 RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
11199 #define SUB8(a, b, n) \
11200 RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
11203 #include "op_addsub.h"
11205 /* Halved unsigned arithmetic. */
11206 #define ADD16(a, b, n) \
11207 RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
11208 #define SUB16(a, b, n) \
11209 RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
11210 #define ADD8(a, b, n) \
11211 RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
11212 #define SUB8(a, b, n) \
11213 RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
11216 #include "op_addsub.h"
11218 static inline uint8_t do_usad(uint8_t a
, uint8_t b
)
11226 /* Unsigned sum of absolute byte differences. */
11227 uint32_t HELPER(usad8
)(uint32_t a
, uint32_t b
)
11230 sum
= do_usad(a
, b
);
11231 sum
+= do_usad(a
>> 8, b
>> 8);
11232 sum
+= do_usad(a
>> 16, b
>>16);
11233 sum
+= do_usad(a
>> 24, b
>> 24);
11237 /* For ARMv6 SEL instruction. */
11238 uint32_t HELPER(sel_flags
)(uint32_t flags
, uint32_t a
, uint32_t b
)
11250 mask
|= 0xff000000;
11251 return (a
& mask
) | (b
& ~mask
);
11254 /* VFP support. We follow the convention used for VFP instructions:
11255 Single precision routines have a "s" suffix, double precision a
11258 /* Convert host exception flags to vfp form. */
11259 static inline int vfp_exceptbits_from_host(int host_bits
)
11261 int target_bits
= 0;
11263 if (host_bits
& float_flag_invalid
)
11265 if (host_bits
& float_flag_divbyzero
)
11267 if (host_bits
& float_flag_overflow
)
11269 if (host_bits
& (float_flag_underflow
| float_flag_output_denormal
))
11271 if (host_bits
& float_flag_inexact
)
11272 target_bits
|= 0x10;
11273 if (host_bits
& float_flag_input_denormal
)
11274 target_bits
|= 0x80;
11275 return target_bits
;
11278 uint32_t HELPER(vfp_get_fpscr
)(CPUARMState
*env
)
11283 fpscr
= (env
->vfp
.xregs
[ARM_VFP_FPSCR
] & 0xffc8ffff)
11284 | (env
->vfp
.vec_len
<< 16)
11285 | (env
->vfp
.vec_stride
<< 20);
11286 i
= get_float_exception_flags(&env
->vfp
.fp_status
);
11287 i
|= get_float_exception_flags(&env
->vfp
.standard_fp_status
);
11288 i
|= get_float_exception_flags(&env
->vfp
.fp_status_f16
);
11289 fpscr
|= vfp_exceptbits_from_host(i
);
11293 uint32_t vfp_get_fpscr(CPUARMState
*env
)
11295 return HELPER(vfp_get_fpscr
)(env
);
11298 /* Convert vfp exception flags to target form. */
11299 static inline int vfp_exceptbits_to_host(int target_bits
)
11303 if (target_bits
& 1)
11304 host_bits
|= float_flag_invalid
;
11305 if (target_bits
& 2)
11306 host_bits
|= float_flag_divbyzero
;
11307 if (target_bits
& 4)
11308 host_bits
|= float_flag_overflow
;
11309 if (target_bits
& 8)
11310 host_bits
|= float_flag_underflow
;
11311 if (target_bits
& 0x10)
11312 host_bits
|= float_flag_inexact
;
11313 if (target_bits
& 0x80)
11314 host_bits
|= float_flag_input_denormal
;
11318 void HELPER(vfp_set_fpscr
)(CPUARMState
*env
, uint32_t val
)
11323 changed
= env
->vfp
.xregs
[ARM_VFP_FPSCR
];
11324 env
->vfp
.xregs
[ARM_VFP_FPSCR
] = (val
& 0xffc8ffff);
11325 env
->vfp
.vec_len
= (val
>> 16) & 7;
11326 env
->vfp
.vec_stride
= (val
>> 20) & 3;
11329 if (changed
& (3 << 22)) {
11330 i
= (val
>> 22) & 3;
11332 case FPROUNDING_TIEEVEN
:
11333 i
= float_round_nearest_even
;
11335 case FPROUNDING_POSINF
:
11336 i
= float_round_up
;
11338 case FPROUNDING_NEGINF
:
11339 i
= float_round_down
;
11341 case FPROUNDING_ZERO
:
11342 i
= float_round_to_zero
;
11345 set_float_rounding_mode(i
, &env
->vfp
.fp_status
);
11346 set_float_rounding_mode(i
, &env
->vfp
.fp_status_f16
);
11348 if (changed
& FPCR_FZ16
) {
11349 bool ftz_enabled
= val
& FPCR_FZ16
;
11350 set_flush_to_zero(ftz_enabled
, &env
->vfp
.fp_status_f16
);
11351 set_flush_inputs_to_zero(ftz_enabled
, &env
->vfp
.fp_status_f16
);
11353 if (changed
& FPCR_FZ
) {
11354 bool ftz_enabled
= val
& FPCR_FZ
;
11355 set_flush_to_zero(ftz_enabled
, &env
->vfp
.fp_status
);
11356 set_flush_inputs_to_zero(ftz_enabled
, &env
->vfp
.fp_status
);
11358 if (changed
& FPCR_DN
) {
11359 bool dnan_enabled
= val
& FPCR_DN
;
11360 set_default_nan_mode(dnan_enabled
, &env
->vfp
.fp_status
);
11361 set_default_nan_mode(dnan_enabled
, &env
->vfp
.fp_status_f16
);
11364 /* The exception flags are ORed together when we read fpscr so we
11365 * only need to preserve the current state in one of our
11366 * float_status values.
11368 i
= vfp_exceptbits_to_host(val
);
11369 set_float_exception_flags(i
, &env
->vfp
.fp_status
);
11370 set_float_exception_flags(0, &env
->vfp
.fp_status_f16
);
11371 set_float_exception_flags(0, &env
->vfp
.standard_fp_status
);
11374 void vfp_set_fpscr(CPUARMState
*env
, uint32_t val
)
11376 HELPER(vfp_set_fpscr
)(env
, val
);
11379 #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
11381 #define VFP_BINOP(name) \
11382 float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
11384 float_status *fpst = fpstp; \
11385 return float32_ ## name(a, b, fpst); \
11387 float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
11389 float_status *fpst = fpstp; \
11390 return float64_ ## name(a, b, fpst); \
11402 float32
VFP_HELPER(neg
, s
)(float32 a
)
11404 return float32_chs(a
);
11407 float64
VFP_HELPER(neg
, d
)(float64 a
)
11409 return float64_chs(a
);
11412 float32
VFP_HELPER(abs
, s
)(float32 a
)
11414 return float32_abs(a
);
11417 float64
VFP_HELPER(abs
, d
)(float64 a
)
11419 return float64_abs(a
);
11422 float32
VFP_HELPER(sqrt
, s
)(float32 a
, CPUARMState
*env
)
11424 return float32_sqrt(a
, &env
->vfp
.fp_status
);
11427 float64
VFP_HELPER(sqrt
, d
)(float64 a
, CPUARMState
*env
)
11429 return float64_sqrt(a
, &env
->vfp
.fp_status
);
11432 /* XXX: check quiet/signaling case */
11433 #define DO_VFP_cmp(p, type) \
11434 void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
11437 switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
11438 case 0: flags = 0x6; break; \
11439 case -1: flags = 0x8; break; \
11440 case 1: flags = 0x2; break; \
11441 default: case 2: flags = 0x3; break; \
11443 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
11444 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
11446 void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
11449 switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
11450 case 0: flags = 0x6; break; \
11451 case -1: flags = 0x8; break; \
11452 case 1: flags = 0x2; break; \
11453 default: case 2: flags = 0x3; break; \
11455 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
11456 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
11458 DO_VFP_cmp(s
, float32
)
11459 DO_VFP_cmp(d
, float64
)
11462 /* Integer to float and float to integer conversions */
11464 #define CONV_ITOF(name, ftype, fsz, sign) \
11465 ftype HELPER(name)(uint32_t x, void *fpstp) \
11467 float_status *fpst = fpstp; \
11468 return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
11471 #define CONV_FTOI(name, ftype, fsz, sign, round) \
11472 sign##int32_t HELPER(name)(ftype x, void *fpstp) \
11474 float_status *fpst = fpstp; \
11475 if (float##fsz##_is_any_nan(x)) { \
11476 float_raise(float_flag_invalid, fpst); \
11479 return float##fsz##_to_##sign##int32##round(x, fpst); \
11482 #define FLOAT_CONVS(name, p, ftype, fsz, sign) \
11483 CONV_ITOF(vfp_##name##to##p, ftype, fsz, sign) \
11484 CONV_FTOI(vfp_to##name##p, ftype, fsz, sign, ) \
11485 CONV_FTOI(vfp_to##name##z##p, ftype, fsz, sign, _round_to_zero)
11487 FLOAT_CONVS(si
, h
, uint32_t, 16, )
11488 FLOAT_CONVS(si
, s
, float32
, 32, )
11489 FLOAT_CONVS(si
, d
, float64
, 64, )
11490 FLOAT_CONVS(ui
, h
, uint32_t, 16, u
)
11491 FLOAT_CONVS(ui
, s
, float32
, 32, u
)
11492 FLOAT_CONVS(ui
, d
, float64
, 64, u
)
11498 /* floating point conversion */
11499 float64
VFP_HELPER(fcvtd
, s
)(float32 x
, CPUARMState
*env
)
11501 return float32_to_float64(x
, &env
->vfp
.fp_status
);
11504 float32
VFP_HELPER(fcvts
, d
)(float64 x
, CPUARMState
*env
)
11506 return float64_to_float32(x
, &env
->vfp
.fp_status
);
11509 /* VFP3 fixed point conversion. */
11510 #define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
11511 float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \
11514 float_status *fpst = fpstp; \
11516 tmp = itype##_to_##float##fsz(x, fpst); \
11517 return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
11520 /* Notice that we want only input-denormal exception flags from the
11521 * scalbn operation: the other possible flags (overflow+inexact if
11522 * we overflow to infinity, output-denormal) aren't correct for the
11523 * complete scale-and-convert operation.
11525 #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
11526 uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
11530 float_status *fpst = fpstp; \
11531 int old_exc_flags = get_float_exception_flags(fpst); \
11533 if (float##fsz##_is_any_nan(x)) { \
11534 float_raise(float_flag_invalid, fpst); \
11537 tmp = float##fsz##_scalbn(x, shift, fpst); \
11538 old_exc_flags |= get_float_exception_flags(fpst) \
11539 & float_flag_input_denormal; \
11540 set_float_exception_flags(old_exc_flags, fpst); \
11541 return float##fsz##_to_##itype##round(tmp, fpst); \
11544 #define VFP_CONV_FIX(name, p, fsz, isz, itype) \
11545 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
11546 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
11547 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
11549 #define VFP_CONV_FIX_A64(name, p, fsz, isz, itype) \
11550 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
11551 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
11553 VFP_CONV_FIX(sh
, d
, 64, 64, int16
)
11554 VFP_CONV_FIX(sl
, d
, 64, 64, int32
)
11555 VFP_CONV_FIX_A64(sq
, d
, 64, 64, int64
)
11556 VFP_CONV_FIX(uh
, d
, 64, 64, uint16
)
11557 VFP_CONV_FIX(ul
, d
, 64, 64, uint32
)
11558 VFP_CONV_FIX_A64(uq
, d
, 64, 64, uint64
)
11559 VFP_CONV_FIX(sh
, s
, 32, 32, int16
)
11560 VFP_CONV_FIX(sl
, s
, 32, 32, int32
)
11561 VFP_CONV_FIX_A64(sq
, s
, 32, 64, int64
)
11562 VFP_CONV_FIX(uh
, s
, 32, 32, uint16
)
11563 VFP_CONV_FIX(ul
, s
, 32, 32, uint32
)
11564 VFP_CONV_FIX_A64(uq
, s
, 32, 64, uint64
)
11566 #undef VFP_CONV_FIX
11567 #undef VFP_CONV_FIX_FLOAT
11568 #undef VFP_CONV_FLOAT_FIX_ROUND
11569 #undef VFP_CONV_FIX_A64
11571 /* Conversion to/from f16 can overflow to infinity before/after scaling.
11572 * Therefore we convert to f64, scale, and then convert f64 to f16; or
11573 * vice versa for conversion to integer.
11575 * For 16- and 32-bit integers, the conversion to f64 never rounds.
11576 * For 64-bit integers, any integer that would cause rounding will also
11577 * overflow to f16 infinity, so there is no double rounding problem.
11580 static float16
do_postscale_fp16(float64 f
, int shift
, float_status
*fpst
)
11582 return float64_to_float16(float64_scalbn(f
, -shift
, fpst
), true, fpst
);
11585 uint32_t HELPER(vfp_sltoh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11587 return do_postscale_fp16(int32_to_float64(x
, fpst
), shift
, fpst
);
11590 uint32_t HELPER(vfp_ultoh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11592 return do_postscale_fp16(uint32_to_float64(x
, fpst
), shift
, fpst
);
11595 uint32_t HELPER(vfp_sqtoh
)(uint64_t x
, uint32_t shift
, void *fpst
)
11597 return do_postscale_fp16(int64_to_float64(x
, fpst
), shift
, fpst
);
11600 uint32_t HELPER(vfp_uqtoh
)(uint64_t x
, uint32_t shift
, void *fpst
)
11602 return do_postscale_fp16(uint64_to_float64(x
, fpst
), shift
, fpst
);
11605 static float64
do_prescale_fp16(float16 f
, int shift
, float_status
*fpst
)
11607 if (unlikely(float16_is_any_nan(f
))) {
11608 float_raise(float_flag_invalid
, fpst
);
11611 int old_exc_flags
= get_float_exception_flags(fpst
);
11614 ret
= float16_to_float64(f
, true, fpst
);
11615 ret
= float64_scalbn(ret
, shift
, fpst
);
11616 old_exc_flags
|= get_float_exception_flags(fpst
)
11617 & float_flag_input_denormal
;
11618 set_float_exception_flags(old_exc_flags
, fpst
);
11624 uint32_t HELPER(vfp_toshh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11626 return float64_to_int16(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11629 uint32_t HELPER(vfp_touhh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11631 return float64_to_uint16(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11634 uint32_t HELPER(vfp_toslh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11636 return float64_to_int32(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11639 uint32_t HELPER(vfp_toulh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11641 return float64_to_uint32(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11644 uint64_t HELPER(vfp_tosqh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11646 return float64_to_int64(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11649 uint64_t HELPER(vfp_touqh
)(uint32_t x
, uint32_t shift
, void *fpst
)
11651 return float64_to_uint64(do_prescale_fp16(x
, shift
, fpst
), fpst
);
11654 /* Set the current fp rounding mode and return the old one.
11655 * The argument is a softfloat float_round_ value.
11657 uint32_t HELPER(set_rmode
)(uint32_t rmode
, void *fpstp
)
11659 float_status
*fp_status
= fpstp
;
11661 uint32_t prev_rmode
= get_float_rounding_mode(fp_status
);
11662 set_float_rounding_mode(rmode
, fp_status
);
11667 /* Set the current fp rounding mode in the standard fp status and return
11668 * the old one. This is for NEON instructions that need to change the
11669 * rounding mode but wish to use the standard FPSCR values for everything
11670 * else. Always set the rounding mode back to the correct value after
11672 * The argument is a softfloat float_round_ value.
11674 uint32_t HELPER(set_neon_rmode
)(uint32_t rmode
, CPUARMState
*env
)
11676 float_status
*fp_status
= &env
->vfp
.standard_fp_status
;
11678 uint32_t prev_rmode
= get_float_rounding_mode(fp_status
);
11679 set_float_rounding_mode(rmode
, fp_status
);
11684 /* Half precision conversions. */
11685 float32
HELPER(vfp_fcvt_f16_to_f32
)(uint32_t a
, void *fpstp
, uint32_t ahp_mode
)
11687 /* Squash FZ16 to 0 for the duration of conversion. In this case,
11688 * it would affect flushing input denormals.
11690 float_status
*fpst
= fpstp
;
11691 flag save
= get_flush_inputs_to_zero(fpst
);
11692 set_flush_inputs_to_zero(false, fpst
);
11693 float32 r
= float16_to_float32(a
, !ahp_mode
, fpst
);
11694 set_flush_inputs_to_zero(save
, fpst
);
11698 uint32_t HELPER(vfp_fcvt_f32_to_f16
)(float32 a
, void *fpstp
, uint32_t ahp_mode
)
11700 /* Squash FZ16 to 0 for the duration of conversion. In this case,
11701 * it would affect flushing output denormals.
11703 float_status
*fpst
= fpstp
;
11704 flag save
= get_flush_to_zero(fpst
);
11705 set_flush_to_zero(false, fpst
);
11706 float16 r
= float32_to_float16(a
, !ahp_mode
, fpst
);
11707 set_flush_to_zero(save
, fpst
);
11711 float64
HELPER(vfp_fcvt_f16_to_f64
)(uint32_t a
, void *fpstp
, uint32_t ahp_mode
)
11713 /* Squash FZ16 to 0 for the duration of conversion. In this case,
11714 * it would affect flushing input denormals.
11716 float_status
*fpst
= fpstp
;
11717 flag save
= get_flush_inputs_to_zero(fpst
);
11718 set_flush_inputs_to_zero(false, fpst
);
11719 float64 r
= float16_to_float64(a
, !ahp_mode
, fpst
);
11720 set_flush_inputs_to_zero(save
, fpst
);
11724 uint32_t HELPER(vfp_fcvt_f64_to_f16
)(float64 a
, void *fpstp
, uint32_t ahp_mode
)
11726 /* Squash FZ16 to 0 for the duration of conversion. In this case,
11727 * it would affect flushing output denormals.
11729 float_status
*fpst
= fpstp
;
11730 flag save
= get_flush_to_zero(fpst
);
11731 set_flush_to_zero(false, fpst
);
11732 float16 r
= float64_to_float16(a
, !ahp_mode
, fpst
);
11733 set_flush_to_zero(save
, fpst
);
11737 #define float32_two make_float32(0x40000000)
11738 #define float32_three make_float32(0x40400000)
11739 #define float32_one_point_five make_float32(0x3fc00000)
11741 float32
HELPER(recps_f32
)(float32 a
, float32 b
, CPUARMState
*env
)
11743 float_status
*s
= &env
->vfp
.standard_fp_status
;
11744 if ((float32_is_infinity(a
) && float32_is_zero_or_denormal(b
)) ||
11745 (float32_is_infinity(b
) && float32_is_zero_or_denormal(a
))) {
11746 if (!(float32_is_zero(a
) || float32_is_zero(b
))) {
11747 float_raise(float_flag_input_denormal
, s
);
11749 return float32_two
;
11751 return float32_sub(float32_two
, float32_mul(a
, b
, s
), s
);
11754 float32
HELPER(rsqrts_f32
)(float32 a
, float32 b
, CPUARMState
*env
)
11756 float_status
*s
= &env
->vfp
.standard_fp_status
;
11758 if ((float32_is_infinity(a
) && float32_is_zero_or_denormal(b
)) ||
11759 (float32_is_infinity(b
) && float32_is_zero_or_denormal(a
))) {
11760 if (!(float32_is_zero(a
) || float32_is_zero(b
))) {
11761 float_raise(float_flag_input_denormal
, s
);
11763 return float32_one_point_five
;
11765 product
= float32_mul(a
, b
, s
);
11766 return float32_div(float32_sub(float32_three
, product
, s
), float32_two
, s
);
11769 /* NEON helpers. */
11771 /* Constants 256 and 512 are used in some helpers; we avoid relying on
11772 * int->float conversions at run-time. */
11773 #define float64_256 make_float64(0x4070000000000000LL)
11774 #define float64_512 make_float64(0x4080000000000000LL)
11775 #define float16_maxnorm make_float16(0x7bff)
11776 #define float32_maxnorm make_float32(0x7f7fffff)
11777 #define float64_maxnorm make_float64(0x7fefffffffffffffLL)
11779 /* Reciprocal functions
11781 * The algorithm that must be used to calculate the estimate
11782 * is specified by the ARM ARM, see FPRecipEstimate()/RecipEstimate
11785 /* See RecipEstimate()
11787 * input is a 9 bit fixed point number
11788 * input range 256 .. 511 for a number from 0.5 <= x < 1.0.
11789 * result range 256 .. 511 for a number from 1.0 to 511/256.
11792 static int recip_estimate(int input
)
11795 assert(256 <= input
&& input
< 512);
11796 a
= (input
* 2) + 1;
11799 assert(256 <= r
&& r
< 512);
11804 * Common wrapper to call recip_estimate
11806 * The parameters are exponent and 64 bit fraction (without implicit
11807 * bit) where the binary point is nominally at bit 52. Returns a
11808 * float64 which can then be rounded to the appropriate size by the
11812 static uint64_t call_recip_estimate(int *exp
, int exp_off
, uint64_t frac
)
11814 uint32_t scaled
, estimate
;
11815 uint64_t result_frac
;
11818 /* Handle sub-normals */
11820 if (extract64(frac
, 51, 1) == 0) {
11828 /* scaled = UInt('1':fraction<51:44>) */
11829 scaled
= deposit32(1 << 8, 0, 8, extract64(frac
, 44, 8));
11830 estimate
= recip_estimate(scaled
);
11832 result_exp
= exp_off
- *exp
;
11833 result_frac
= deposit64(0, 44, 8, estimate
);
11834 if (result_exp
== 0) {
11835 result_frac
= deposit64(result_frac
>> 1, 51, 1, 1);
11836 } else if (result_exp
== -1) {
11837 result_frac
= deposit64(result_frac
>> 2, 50, 2, 1);
11843 return result_frac
;
11846 static bool round_to_inf(float_status
*fpst
, bool sign_bit
)
11848 switch (fpst
->float_rounding_mode
) {
11849 case float_round_nearest_even
: /* Round to Nearest */
11851 case float_round_up
: /* Round to +Inf */
11853 case float_round_down
: /* Round to -Inf */
11855 case float_round_to_zero
: /* Round to Zero */
11859 g_assert_not_reached();
11862 uint32_t HELPER(recpe_f16
)(uint32_t input
, void *fpstp
)
11864 float_status
*fpst
= fpstp
;
11865 float16 f16
= float16_squash_input_denormal(input
, fpst
);
11866 uint32_t f16_val
= float16_val(f16
);
11867 uint32_t f16_sign
= float16_is_neg(f16
);
11868 int f16_exp
= extract32(f16_val
, 10, 5);
11869 uint32_t f16_frac
= extract32(f16_val
, 0, 10);
11872 if (float16_is_any_nan(f16
)) {
11874 if (float16_is_signaling_nan(f16
, fpst
)) {
11875 float_raise(float_flag_invalid
, fpst
);
11876 nan
= float16_silence_nan(f16
, fpst
);
11878 if (fpst
->default_nan_mode
) {
11879 nan
= float16_default_nan(fpst
);
11882 } else if (float16_is_infinity(f16
)) {
11883 return float16_set_sign(float16_zero
, float16_is_neg(f16
));
11884 } else if (float16_is_zero(f16
)) {
11885 float_raise(float_flag_divbyzero
, fpst
);
11886 return float16_set_sign(float16_infinity
, float16_is_neg(f16
));
11887 } else if (float16_abs(f16
) < (1 << 8)) {
11888 /* Abs(value) < 2.0^-16 */
11889 float_raise(float_flag_overflow
| float_flag_inexact
, fpst
);
11890 if (round_to_inf(fpst
, f16_sign
)) {
11891 return float16_set_sign(float16_infinity
, f16_sign
);
11893 return float16_set_sign(float16_maxnorm
, f16_sign
);
11895 } else if (f16_exp
>= 29 && fpst
->flush_to_zero
) {
11896 float_raise(float_flag_underflow
, fpst
);
11897 return float16_set_sign(float16_zero
, float16_is_neg(f16
));
11900 f64_frac
= call_recip_estimate(&f16_exp
, 29,
11901 ((uint64_t) f16_frac
) << (52 - 10));
11903 /* result = sign : result_exp<4:0> : fraction<51:42> */
11904 f16_val
= deposit32(0, 15, 1, f16_sign
);
11905 f16_val
= deposit32(f16_val
, 10, 5, f16_exp
);
11906 f16_val
= deposit32(f16_val
, 0, 10, extract64(f64_frac
, 52 - 10, 10));
11907 return make_float16(f16_val
);
11910 float32
HELPER(recpe_f32
)(float32 input
, void *fpstp
)
11912 float_status
*fpst
= fpstp
;
11913 float32 f32
= float32_squash_input_denormal(input
, fpst
);
11914 uint32_t f32_val
= float32_val(f32
);
11915 bool f32_sign
= float32_is_neg(f32
);
11916 int f32_exp
= extract32(f32_val
, 23, 8);
11917 uint32_t f32_frac
= extract32(f32_val
, 0, 23);
11920 if (float32_is_any_nan(f32
)) {
11922 if (float32_is_signaling_nan(f32
, fpst
)) {
11923 float_raise(float_flag_invalid
, fpst
);
11924 nan
= float32_silence_nan(f32
, fpst
);
11926 if (fpst
->default_nan_mode
) {
11927 nan
= float32_default_nan(fpst
);
11930 } else if (float32_is_infinity(f32
)) {
11931 return float32_set_sign(float32_zero
, float32_is_neg(f32
));
11932 } else if (float32_is_zero(f32
)) {
11933 float_raise(float_flag_divbyzero
, fpst
);
11934 return float32_set_sign(float32_infinity
, float32_is_neg(f32
));
11935 } else if (float32_abs(f32
) < (1ULL << 21)) {
11936 /* Abs(value) < 2.0^-128 */
11937 float_raise(float_flag_overflow
| float_flag_inexact
, fpst
);
11938 if (round_to_inf(fpst
, f32_sign
)) {
11939 return float32_set_sign(float32_infinity
, f32_sign
);
11941 return float32_set_sign(float32_maxnorm
, f32_sign
);
11943 } else if (f32_exp
>= 253 && fpst
->flush_to_zero
) {
11944 float_raise(float_flag_underflow
, fpst
);
11945 return float32_set_sign(float32_zero
, float32_is_neg(f32
));
11948 f64_frac
= call_recip_estimate(&f32_exp
, 253,
11949 ((uint64_t) f32_frac
) << (52 - 23));
11951 /* result = sign : result_exp<7:0> : fraction<51:29> */
11952 f32_val
= deposit32(0, 31, 1, f32_sign
);
11953 f32_val
= deposit32(f32_val
, 23, 8, f32_exp
);
11954 f32_val
= deposit32(f32_val
, 0, 23, extract64(f64_frac
, 52 - 23, 23));
11955 return make_float32(f32_val
);
11958 float64
HELPER(recpe_f64
)(float64 input
, void *fpstp
)
11960 float_status
*fpst
= fpstp
;
11961 float64 f64
= float64_squash_input_denormal(input
, fpst
);
11962 uint64_t f64_val
= float64_val(f64
);
11963 bool f64_sign
= float64_is_neg(f64
);
11964 int f64_exp
= extract64(f64_val
, 52, 11);
11965 uint64_t f64_frac
= extract64(f64_val
, 0, 52);
11967 /* Deal with any special cases */
11968 if (float64_is_any_nan(f64
)) {
11970 if (float64_is_signaling_nan(f64
, fpst
)) {
11971 float_raise(float_flag_invalid
, fpst
);
11972 nan
= float64_silence_nan(f64
, fpst
);
11974 if (fpst
->default_nan_mode
) {
11975 nan
= float64_default_nan(fpst
);
11978 } else if (float64_is_infinity(f64
)) {
11979 return float64_set_sign(float64_zero
, float64_is_neg(f64
));
11980 } else if (float64_is_zero(f64
)) {
11981 float_raise(float_flag_divbyzero
, fpst
);
11982 return float64_set_sign(float64_infinity
, float64_is_neg(f64
));
11983 } else if ((f64_val
& ~(1ULL << 63)) < (1ULL << 50)) {
11984 /* Abs(value) < 2.0^-1024 */
11985 float_raise(float_flag_overflow
| float_flag_inexact
, fpst
);
11986 if (round_to_inf(fpst
, f64_sign
)) {
11987 return float64_set_sign(float64_infinity
, f64_sign
);
11989 return float64_set_sign(float64_maxnorm
, f64_sign
);
11991 } else if (f64_exp
>= 2045 && fpst
->flush_to_zero
) {
11992 float_raise(float_flag_underflow
, fpst
);
11993 return float64_set_sign(float64_zero
, float64_is_neg(f64
));
11996 f64_frac
= call_recip_estimate(&f64_exp
, 2045, f64_frac
);
11998 /* result = sign : result_exp<10:0> : fraction<51:0>; */
11999 f64_val
= deposit64(0, 63, 1, f64_sign
);
12000 f64_val
= deposit64(f64_val
, 52, 11, f64_exp
);
12001 f64_val
= deposit64(f64_val
, 0, 52, f64_frac
);
12002 return make_float64(f64_val
);
12005 /* The algorithm that must be used to calculate the estimate
12006 * is specified by the ARM ARM.
12009 static int do_recip_sqrt_estimate(int a
)
12013 assert(128 <= a
&& a
< 512);
12021 while (a
* (b
+ 1) * (b
+ 1) < (1 << 28)) {
12024 estimate
= (b
+ 1) / 2;
12025 assert(256 <= estimate
&& estimate
< 512);
12031 static uint64_t recip_sqrt_estimate(int *exp
, int exp_off
, uint64_t frac
)
12037 while (extract64(frac
, 51, 1) == 0) {
12041 frac
= extract64(frac
, 0, 51) << 1;
12045 /* scaled = UInt('01':fraction<51:45>) */
12046 scaled
= deposit32(1 << 7, 0, 7, extract64(frac
, 45, 7));
12048 /* scaled = UInt('1':fraction<51:44>) */
12049 scaled
= deposit32(1 << 8, 0, 8, extract64(frac
, 44, 8));
12051 estimate
= do_recip_sqrt_estimate(scaled
);
12053 *exp
= (exp_off
- *exp
) / 2;
12054 return extract64(estimate
, 0, 8) << 44;
12057 uint32_t HELPER(rsqrte_f16
)(uint32_t input
, void *fpstp
)
12059 float_status
*s
= fpstp
;
12060 float16 f16
= float16_squash_input_denormal(input
, s
);
12061 uint16_t val
= float16_val(f16
);
12062 bool f16_sign
= float16_is_neg(f16
);
12063 int f16_exp
= extract32(val
, 10, 5);
12064 uint16_t f16_frac
= extract32(val
, 0, 10);
12067 if (float16_is_any_nan(f16
)) {
12069 if (float16_is_signaling_nan(f16
, s
)) {
12070 float_raise(float_flag_invalid
, s
);
12071 nan
= float16_silence_nan(f16
, s
);
12073 if (s
->default_nan_mode
) {
12074 nan
= float16_default_nan(s
);
12077 } else if (float16_is_zero(f16
)) {
12078 float_raise(float_flag_divbyzero
, s
);
12079 return float16_set_sign(float16_infinity
, f16_sign
);
12080 } else if (f16_sign
) {
12081 float_raise(float_flag_invalid
, s
);
12082 return float16_default_nan(s
);
12083 } else if (float16_is_infinity(f16
)) {
12084 return float16_zero
;
12087 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
12088 * preserving the parity of the exponent. */
12090 f64_frac
= ((uint64_t) f16_frac
) << (52 - 10);
12092 f64_frac
= recip_sqrt_estimate(&f16_exp
, 44, f64_frac
);
12094 /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(2) */
12095 val
= deposit32(0, 15, 1, f16_sign
);
12096 val
= deposit32(val
, 10, 5, f16_exp
);
12097 val
= deposit32(val
, 2, 8, extract64(f64_frac
, 52 - 8, 8));
12098 return make_float16(val
);
12101 float32
HELPER(rsqrte_f32
)(float32 input
, void *fpstp
)
12103 float_status
*s
= fpstp
;
12104 float32 f32
= float32_squash_input_denormal(input
, s
);
12105 uint32_t val
= float32_val(f32
);
12106 uint32_t f32_sign
= float32_is_neg(f32
);
12107 int f32_exp
= extract32(val
, 23, 8);
12108 uint32_t f32_frac
= extract32(val
, 0, 23);
12111 if (float32_is_any_nan(f32
)) {
12113 if (float32_is_signaling_nan(f32
, s
)) {
12114 float_raise(float_flag_invalid
, s
);
12115 nan
= float32_silence_nan(f32
, s
);
12117 if (s
->default_nan_mode
) {
12118 nan
= float32_default_nan(s
);
12121 } else if (float32_is_zero(f32
)) {
12122 float_raise(float_flag_divbyzero
, s
);
12123 return float32_set_sign(float32_infinity
, float32_is_neg(f32
));
12124 } else if (float32_is_neg(f32
)) {
12125 float_raise(float_flag_invalid
, s
);
12126 return float32_default_nan(s
);
12127 } else if (float32_is_infinity(f32
)) {
12128 return float32_zero
;
12131 /* Scale and normalize to a double-precision value between 0.25 and 1.0,
12132 * preserving the parity of the exponent. */
12134 f64_frac
= ((uint64_t) f32_frac
) << 29;
12136 f64_frac
= recip_sqrt_estimate(&f32_exp
, 380, f64_frac
);
12138 /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(15) */
12139 val
= deposit32(0, 31, 1, f32_sign
);
12140 val
= deposit32(val
, 23, 8, f32_exp
);
12141 val
= deposit32(val
, 15, 8, extract64(f64_frac
, 52 - 8, 8));
12142 return make_float32(val
);
12145 float64
HELPER(rsqrte_f64
)(float64 input
, void *fpstp
)
12147 float_status
*s
= fpstp
;
12148 float64 f64
= float64_squash_input_denormal(input
, s
);
12149 uint64_t val
= float64_val(f64
);
12150 bool f64_sign
= float64_is_neg(f64
);
12151 int f64_exp
= extract64(val
, 52, 11);
12152 uint64_t f64_frac
= extract64(val
, 0, 52);
12154 if (float64_is_any_nan(f64
)) {
12156 if (float64_is_signaling_nan(f64
, s
)) {
12157 float_raise(float_flag_invalid
, s
);
12158 nan
= float64_silence_nan(f64
, s
);
12160 if (s
->default_nan_mode
) {
12161 nan
= float64_default_nan(s
);
12164 } else if (float64_is_zero(f64
)) {
12165 float_raise(float_flag_divbyzero
, s
);
12166 return float64_set_sign(float64_infinity
, float64_is_neg(f64
));
12167 } else if (float64_is_neg(f64
)) {
12168 float_raise(float_flag_invalid
, s
);
12169 return float64_default_nan(s
);
12170 } else if (float64_is_infinity(f64
)) {
12171 return float64_zero
;
12174 f64_frac
= recip_sqrt_estimate(&f64_exp
, 3068, f64_frac
);
12176 /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(44) */
12177 val
= deposit64(0, 61, 1, f64_sign
);
12178 val
= deposit64(val
, 52, 11, f64_exp
);
12179 val
= deposit64(val
, 44, 8, extract64(f64_frac
, 52 - 8, 8));
12180 return make_float64(val
);
12183 uint32_t HELPER(recpe_u32
)(uint32_t a
, void *fpstp
)
12185 /* float_status *s = fpstp; */
12186 int input
, estimate
;
12188 if ((a
& 0x80000000) == 0) {
12192 input
= extract32(a
, 23, 9);
12193 estimate
= recip_estimate(input
);
12195 return deposit32(0, (32 - 9), 9, estimate
);
12198 uint32_t HELPER(rsqrte_u32
)(uint32_t a
, void *fpstp
)
12202 if ((a
& 0xc0000000) == 0) {
12206 estimate
= do_recip_sqrt_estimate(extract32(a
, 23, 9));
12208 return deposit32(0, 23, 9, estimate
);
12211 /* VFPv4 fused multiply-accumulate */
12212 float32
VFP_HELPER(muladd
, s
)(float32 a
, float32 b
, float32 c
, void *fpstp
)
12214 float_status
*fpst
= fpstp
;
12215 return float32_muladd(a
, b
, c
, 0, fpst
);
12218 float64
VFP_HELPER(muladd
, d
)(float64 a
, float64 b
, float64 c
, void *fpstp
)
12220 float_status
*fpst
= fpstp
;
12221 return float64_muladd(a
, b
, c
, 0, fpst
);
12224 /* ARMv8 round to integral */
12225 float32
HELPER(rints_exact
)(float32 x
, void *fp_status
)
12227 return float32_round_to_int(x
, fp_status
);
12230 float64
HELPER(rintd_exact
)(float64 x
, void *fp_status
)
12232 return float64_round_to_int(x
, fp_status
);
12235 float32
HELPER(rints
)(float32 x
, void *fp_status
)
12237 int old_flags
= get_float_exception_flags(fp_status
), new_flags
;
12240 ret
= float32_round_to_int(x
, fp_status
);
12242 /* Suppress any inexact exceptions the conversion produced */
12243 if (!(old_flags
& float_flag_inexact
)) {
12244 new_flags
= get_float_exception_flags(fp_status
);
12245 set_float_exception_flags(new_flags
& ~float_flag_inexact
, fp_status
);
12251 float64
HELPER(rintd
)(float64 x
, void *fp_status
)
12253 int old_flags
= get_float_exception_flags(fp_status
), new_flags
;
12256 ret
= float64_round_to_int(x
, fp_status
);
12258 new_flags
= get_float_exception_flags(fp_status
);
12260 /* Suppress any inexact exceptions the conversion produced */
12261 if (!(old_flags
& float_flag_inexact
)) {
12262 new_flags
= get_float_exception_flags(fp_status
);
12263 set_float_exception_flags(new_flags
& ~float_flag_inexact
, fp_status
);
12269 /* Convert ARM rounding mode to softfloat */
12270 int arm_rmode_to_sf(int rmode
)
12273 case FPROUNDING_TIEAWAY
:
12274 rmode
= float_round_ties_away
;
12276 case FPROUNDING_ODD
:
12277 /* FIXME: add support for TIEAWAY and ODD */
12278 qemu_log_mask(LOG_UNIMP
, "arm: unimplemented rounding mode: %d\n",
12280 case FPROUNDING_TIEEVEN
:
12282 rmode
= float_round_nearest_even
;
12284 case FPROUNDING_POSINF
:
12285 rmode
= float_round_up
;
12287 case FPROUNDING_NEGINF
:
12288 rmode
= float_round_down
;
12290 case FPROUNDING_ZERO
:
12291 rmode
= float_round_to_zero
;
12298 * The upper bytes of val (above the number specified by 'bytes') must have
12299 * been zeroed out by the caller.
12301 uint32_t HELPER(crc32
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
12305 stl_le_p(buf
, val
);
12307 /* zlib crc32 converts the accumulator and output to one's complement. */
12308 return crc32(acc
^ 0xffffffff, buf
, bytes
) ^ 0xffffffff;
12311 uint32_t HELPER(crc32c
)(uint32_t acc
, uint32_t val
, uint32_t bytes
)
12315 stl_le_p(buf
, val
);
12317 /* Linux crc32c converts the output to one's complement. */
12318 return crc32c(acc
, buf
, bytes
) ^ 0xffffffff;
12321 /* Return the exception level to which FP-disabled exceptions should
12322 * be taken, or 0 if FP is enabled.
12324 static inline int fp_exception_el(CPUARMState
*env
)
12326 #ifndef CONFIG_USER_ONLY
12328 int cur_el
= arm_current_el(env
);
12330 /* CPACR and the CPTR registers don't exist before v6, so FP is
12331 * always accessible
12333 if (!arm_feature(env
, ARM_FEATURE_V6
)) {
12337 /* The CPACR controls traps to EL1, or PL1 if we're 32 bit:
12338 * 0, 2 : trap EL0 and EL1/PL1 accesses
12339 * 1 : trap only EL0 accesses
12340 * 3 : trap no accesses
12342 fpen
= extract32(env
->cp15
.cpacr_el1
, 20, 2);
12346 if (cur_el
== 0 || cur_el
== 1) {
12347 /* Trap to PL1, which might be EL1 or EL3 */
12348 if (arm_is_secure(env
) && !arm_el_is_aa64(env
, 3)) {
12353 if (cur_el
== 3 && !is_a64(env
)) {
12354 /* Secure PL1 running at EL3 */
12367 /* For the CPTR registers we don't need to guard with an ARM_FEATURE
12368 * check because zero bits in the registers mean "don't trap".
12371 /* CPTR_EL2 : present in v7VE or v8 */
12372 if (cur_el
<= 2 && extract32(env
->cp15
.cptr_el
[2], 10, 1)
12373 && !arm_is_secure_below_el3(env
)) {
12374 /* Trap FP ops at EL2, NS-EL1 or NS-EL0 to EL2 */
12378 /* CPTR_EL3 : present in v8 */
12379 if (extract32(env
->cp15
.cptr_el
[3], 10, 1)) {
12380 /* Trap all FP ops to EL3 */
12387 void cpu_get_tb_cpu_state(CPUARMState
*env
, target_ulong
*pc
,
12388 target_ulong
*cs_base
, uint32_t *pflags
)
12390 ARMMMUIdx mmu_idx
= core_to_arm_mmu_idx(env
, cpu_mmu_index(env
, false));
12391 int fp_el
= fp_exception_el(env
);
12395 int sve_el
= sve_exception_el(env
);
12399 flags
= ARM_TBFLAG_AARCH64_STATE_MASK
;
12400 /* Get control bits for tagged addresses */
12401 flags
|= (arm_regime_tbi0(env
, mmu_idx
) << ARM_TBFLAG_TBI0_SHIFT
);
12402 flags
|= (arm_regime_tbi1(env
, mmu_idx
) << ARM_TBFLAG_TBI1_SHIFT
);
12403 flags
|= sve_el
<< ARM_TBFLAG_SVEEXC_EL_SHIFT
;
12405 /* If SVE is disabled, but FP is enabled,
12406 then the effective len is 0. */
12407 if (sve_el
!= 0 && fp_el
== 0) {
12410 int current_el
= arm_current_el(env
);
12412 zcr_len
= env
->vfp
.zcr_el
[current_el
<= 1 ? 1 : current_el
];
12414 if (current_el
< 2 && arm_feature(env
, ARM_FEATURE_EL2
)) {
12415 zcr_len
= MIN(zcr_len
, 0xf & (uint32_t)env
->vfp
.zcr_el
[2]);
12417 if (current_el
< 3 && arm_feature(env
, ARM_FEATURE_EL3
)) {
12418 zcr_len
= MIN(zcr_len
, 0xf & (uint32_t)env
->vfp
.zcr_el
[3]);
12421 flags
|= zcr_len
<< ARM_TBFLAG_ZCR_LEN_SHIFT
;
12423 *pc
= env
->regs
[15];
12424 flags
= (env
->thumb
<< ARM_TBFLAG_THUMB_SHIFT
)
12425 | (env
->vfp
.vec_len
<< ARM_TBFLAG_VECLEN_SHIFT
)
12426 | (env
->vfp
.vec_stride
<< ARM_TBFLAG_VECSTRIDE_SHIFT
)
12427 | (env
->condexec_bits
<< ARM_TBFLAG_CONDEXEC_SHIFT
)
12428 | (arm_sctlr_b(env
) << ARM_TBFLAG_SCTLR_B_SHIFT
);
12429 if (!(access_secure_reg(env
))) {
12430 flags
|= ARM_TBFLAG_NS_MASK
;
12432 if (env
->vfp
.xregs
[ARM_VFP_FPEXC
] & (1 << 30)
12433 || arm_el_is_aa64(env
, 1)) {
12434 flags
|= ARM_TBFLAG_VFPEN_MASK
;
12436 flags
|= (extract32(env
->cp15
.c15_cpar
, 0, 2)
12437 << ARM_TBFLAG_XSCALE_CPAR_SHIFT
);
12440 flags
|= (arm_to_core_mmu_idx(mmu_idx
) << ARM_TBFLAG_MMUIDX_SHIFT
);
12442 /* The SS_ACTIVE and PSTATE_SS bits correspond to the state machine
12443 * states defined in the ARM ARM for software singlestep:
12444 * SS_ACTIVE PSTATE.SS State
12445 * 0 x Inactive (the TB flag for SS is always 0)
12446 * 1 0 Active-pending
12447 * 1 1 Active-not-pending
12449 if (arm_singlestep_active(env
)) {
12450 flags
|= ARM_TBFLAG_SS_ACTIVE_MASK
;
12452 if (env
->pstate
& PSTATE_SS
) {
12453 flags
|= ARM_TBFLAG_PSTATE_SS_MASK
;
12456 if (env
->uncached_cpsr
& PSTATE_SS
) {
12457 flags
|= ARM_TBFLAG_PSTATE_SS_MASK
;
12461 if (arm_cpu_data_is_big_endian(env
)) {
12462 flags
|= ARM_TBFLAG_BE_DATA_MASK
;
12464 flags
|= fp_el
<< ARM_TBFLAG_FPEXC_EL_SHIFT
;
12466 if (arm_v7m_is_handler_mode(env
)) {
12467 flags
|= ARM_TBFLAG_HANDLER_MASK
;