1 /***************************************************************************
2 * Copyright (C) 2015 by David Ung *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
18 ***************************************************************************/
24 #include "breakpoints.h"
27 #include "target_request.h"
28 #include "target_type.h"
29 #include "armv8_opcodes.h"
30 #include "armv8_cache.h"
31 #include <helper/time_support.h>
33 static int aarch64_poll(struct target
*target
);
34 static int aarch64_debug_entry(struct target
*target
);
35 static int aarch64_restore_context(struct target
*target
, bool bpwp
);
36 static int aarch64_set_breakpoint(struct target
*target
,
37 struct breakpoint
*breakpoint
, uint8_t matchmode
);
38 static int aarch64_set_context_breakpoint(struct target
*target
,
39 struct breakpoint
*breakpoint
, uint8_t matchmode
);
40 static int aarch64_set_hybrid_breakpoint(struct target
*target
,
41 struct breakpoint
*breakpoint
);
42 static int aarch64_unset_breakpoint(struct target
*target
,
43 struct breakpoint
*breakpoint
);
44 static int aarch64_mmu(struct target
*target
, int *enabled
);
45 static int aarch64_virt2phys(struct target
*target
,
46 target_addr_t virt
, target_addr_t
*phys
);
47 static int aarch64_read_apb_ap_memory(struct target
*target
,
48 uint64_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
);
49 static int aarch64_instr_write_data_r0(struct arm_dpm
*dpm
,
50 uint32_t opcode
, uint32_t data
);
52 static int aarch64_restore_system_control_reg(struct target
*target
)
54 int retval
= ERROR_OK
;
56 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
57 struct armv8_common
*armv8
= target_to_armv8(target
);
59 if (aarch64
->system_control_reg
!= aarch64
->system_control_reg_curr
) {
60 aarch64
->system_control_reg_curr
= aarch64
->system_control_reg
;
61 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
63 switch (armv8
->arm
.core_mode
) {
67 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
70 aarch64
->system_control_reg
);
71 if (retval
!= ERROR_OK
)
76 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
79 aarch64
->system_control_reg
);
80 if (retval
!= ERROR_OK
)
85 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
88 aarch64
->system_control_reg
);
89 if (retval
!= ERROR_OK
)
93 retval
= armv8
->arm
.mcr(target
, 15, 0, 0, 1, 0, aarch64
->system_control_reg
);
94 if (retval
!= ERROR_OK
)
102 /* check address before aarch64_apb read write access with mmu on
103 * remove apb predictible data abort */
104 static int aarch64_check_address(struct target
*target
, uint32_t address
)
109 /* modify system_control_reg in order to enable or disable mmu for :
110 * - virt2phys address conversion
111 * - read or write memory in phys or virt address */
112 static int aarch64_mmu_modify(struct target
*target
, int enable
)
114 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
115 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
116 int retval
= ERROR_OK
;
119 /* if mmu enabled at target stop and mmu not enable */
120 if (!(aarch64
->system_control_reg
& 0x1U
)) {
121 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
124 if (!(aarch64
->system_control_reg_curr
& 0x1U
)) {
125 aarch64
->system_control_reg_curr
|= 0x1U
;
126 switch (armv8
->arm
.core_mode
) {
130 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
133 aarch64
->system_control_reg_curr
);
134 if (retval
!= ERROR_OK
)
139 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
142 aarch64
->system_control_reg_curr
);
143 if (retval
!= ERROR_OK
)
148 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
151 aarch64
->system_control_reg_curr
);
152 if (retval
!= ERROR_OK
)
156 LOG_DEBUG("unknow cpu state 0x%x" PRIx32
, armv8
->arm
.core_state
);
160 if (aarch64
->system_control_reg_curr
& 0x4U
) {
161 /* data cache is active */
162 aarch64
->system_control_reg_curr
&= ~0x4U
;
163 /* flush data cache armv7 function to be called */
164 if (armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache
)
165 armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache(target
);
167 if ((aarch64
->system_control_reg_curr
& 0x1U
)) {
168 aarch64
->system_control_reg_curr
&= ~0x1U
;
169 switch (armv8
->arm
.core_mode
) {
173 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
176 aarch64
->system_control_reg_curr
);
177 if (retval
!= ERROR_OK
)
182 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
185 aarch64
->system_control_reg_curr
);
186 if (retval
!= ERROR_OK
)
191 retval
= armv8
->arm
.msr(target
, 3, /*op 0*/
194 aarch64
->system_control_reg_curr
);
195 if (retval
!= ERROR_OK
)
199 LOG_DEBUG("unknow cpu state 0x%x" PRIx32
, armv8
->arm
.core_state
);
208 * Basic debug access, very low level assumes state is saved
210 static int aarch64_init_debug_access(struct target
*target
)
212 struct armv8_common
*armv8
= target_to_armv8(target
);
218 /* Clear Sticky Power Down status Bit in PRSR to enable access to
219 the registers in the Core Power Domain */
220 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
221 armv8
->debug_base
+ CPUV8_DBG_PRSR
, &dummy
);
222 if (retval
!= ERROR_OK
)
226 * Static CTI configuration:
227 * Channel 0 -> trigger outputs HALT request to PE
228 * Channel 1 -> trigger outputs Resume request to PE
229 * Gate all channel trigger events from entering the CTM
233 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
234 armv8
->cti_base
+ CTI_CTR
, 1);
235 /* By default, gate all channel triggers to and from the CTM */
236 if (retval
== ERROR_OK
)
237 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
238 armv8
->cti_base
+ CTI_GATE
, 0);
239 /* output halt requests to PE on channel 0 trigger */
240 if (retval
== ERROR_OK
)
241 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
242 armv8
->cti_base
+ CTI_OUTEN0
, CTI_CHNL(0));
243 /* output restart requests to PE on channel 1 trigger */
244 if (retval
== ERROR_OK
)
245 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
246 armv8
->cti_base
+ CTI_OUTEN1
, CTI_CHNL(1));
247 if (retval
!= ERROR_OK
)
250 /* Resync breakpoint registers */
252 /* Since this is likely called from init or reset, update target state information*/
253 return aarch64_poll(target
);
256 /* To reduce needless round-trips, pass in a pointer to the current
257 * DSCR value. Initialize it to zero if you just need to know the
258 * value on return from this function; or DSCR_ITE if you
259 * happen to know that no instruction is pending.
261 static int aarch64_exec_opcode(struct target
*target
,
262 uint32_t opcode
, uint32_t *dscr_p
)
266 struct armv8_common
*armv8
= target_to_armv8(target
);
267 dscr
= dscr_p
? *dscr_p
: 0;
269 LOG_DEBUG("exec opcode 0x%08" PRIx32
, opcode
);
271 /* Wait for InstrCompl bit to be set */
272 long long then
= timeval_ms();
273 while ((dscr
& DSCR_ITE
) == 0) {
274 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
275 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
276 if (retval
!= ERROR_OK
) {
277 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32
, opcode
);
280 if (timeval_ms() > then
+ 1000) {
281 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
286 retval
= mem_ap_write_u32(armv8
->debug_ap
,
287 armv8
->debug_base
+ CPUV8_DBG_ITR
, opcode
);
288 if (retval
!= ERROR_OK
)
293 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
294 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
295 if (retval
!= ERROR_OK
) {
296 LOG_ERROR("Could not read DSCR register");
299 if (timeval_ms() > then
+ 1000) {
300 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
303 } while ((dscr
& DSCR_ITE
) == 0); /* Wait for InstrCompl bit to be set */
311 /* Write to memory mapped registers directly with no cache or mmu handling */
312 static int aarch64_dap_write_memap_register_u32(struct target
*target
,
317 struct armv8_common
*armv8
= target_to_armv8(target
);
319 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
, address
, value
);
325 * AARCH64 implementation of Debug Programmer's Model
327 * NOTE the invariant: these routines return with DSCR_ITE set,
328 * so there's no need to poll for it before executing an instruction.
330 * NOTE that in several of these cases the "stall" mode might be useful.
331 * It'd let us queue a few operations together... prepare/finish might
332 * be the places to enable/disable that mode.
335 static inline struct aarch64_common
*dpm_to_a8(struct arm_dpm
*dpm
)
337 return container_of(dpm
, struct aarch64_common
, armv8_common
.dpm
);
340 static int aarch64_write_dcc(struct armv8_common
*armv8
, uint32_t data
)
342 LOG_DEBUG("write DCC 0x%08" PRIx32
, data
);
343 return mem_ap_write_u32(armv8
->debug_ap
,
344 armv8
->debug_base
+ CPUV8_DBG_DTRRX
, data
);
347 static int aarch64_write_dcc_64(struct armv8_common
*armv8
, uint64_t data
)
350 LOG_DEBUG("write DCC Low word0x%08" PRIx32
, (unsigned)data
);
351 LOG_DEBUG("write DCC High word 0x%08" PRIx32
, (unsigned)(data
>> 32));
352 ret
= mem_ap_write_u32(armv8
->debug_ap
,
353 armv8
->debug_base
+ CPUV8_DBG_DTRRX
, data
);
354 ret
+= mem_ap_write_u32(armv8
->debug_ap
,
355 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, data
>> 32);
359 static int aarch64_read_dcc(struct armv8_common
*armv8
, uint32_t *data
,
362 uint32_t dscr
= DSCR_ITE
;
368 /* Wait for DTRRXfull */
369 long long then
= timeval_ms();
370 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
371 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
372 armv8
->debug_base
+ CPUV8_DBG_DSCR
,
374 if (retval
!= ERROR_OK
)
376 if (timeval_ms() > then
+ 1000) {
377 LOG_ERROR("Timeout waiting for read dcc");
382 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
383 armv8
->debug_base
+ CPUV8_DBG_DTRTX
,
385 if (retval
!= ERROR_OK
)
387 LOG_DEBUG("read DCC 0x%08" PRIx32
, *data
);
395 static int aarch64_read_dcc_64(struct armv8_common
*armv8
, uint64_t *data
,
398 uint32_t dscr
= DSCR_ITE
;
405 /* Wait for DTRRXfull */
406 long long then
= timeval_ms();
407 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
408 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
409 armv8
->debug_base
+ CPUV8_DBG_DSCR
,
411 if (retval
!= ERROR_OK
)
413 if (timeval_ms() > then
+ 1000) {
414 LOG_ERROR("Timeout waiting for read dcc");
419 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
420 armv8
->debug_base
+ CPUV8_DBG_DTRTX
,
422 if (retval
!= ERROR_OK
)
425 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
426 armv8
->debug_base
+ CPUV8_DBG_DTRRX
,
428 if (retval
!= ERROR_OK
)
431 *data
= *(uint32_t *)data
| (uint64_t)higher
<< 32;
432 LOG_DEBUG("read DCC 0x%16.16" PRIx64
, *data
);
440 static int aarch64_dpm_prepare(struct arm_dpm
*dpm
)
442 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
446 /* set up invariant: INSTR_COMP is set after ever DPM operation */
447 long long then
= timeval_ms();
449 retval
= mem_ap_read_atomic_u32(a8
->armv8_common
.debug_ap
,
450 a8
->armv8_common
.debug_base
+ CPUV8_DBG_DSCR
,
452 if (retval
!= ERROR_OK
)
454 if ((dscr
& DSCR_ITE
) != 0)
456 if (timeval_ms() > then
+ 1000) {
457 LOG_ERROR("Timeout waiting for dpm prepare");
462 /* this "should never happen" ... */
463 if (dscr
& DSCR_DTR_RX_FULL
) {
464 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
466 retval
= mem_ap_read_u32(a8
->armv8_common
.debug_ap
,
467 a8
->armv8_common
.debug_base
+ CPUV8_DBG_DTRRX
, &dscr
);
468 if (retval
!= ERROR_OK
)
471 /* Clear sticky error */
472 retval
= mem_ap_write_u32(a8
->armv8_common
.debug_ap
,
473 a8
->armv8_common
.debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
474 if (retval
!= ERROR_OK
)
481 static int aarch64_dpm_finish(struct arm_dpm
*dpm
)
483 /* REVISIT what could be done here? */
487 static int aarch64_instr_execute(struct arm_dpm
*dpm
,
490 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
491 uint32_t dscr
= DSCR_ITE
;
493 return aarch64_exec_opcode(
494 a8
->armv8_common
.arm
.target
,
499 static int aarch64_instr_write_data_dcc(struct arm_dpm
*dpm
,
500 uint32_t opcode
, uint32_t data
)
502 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
504 uint32_t dscr
= DSCR_ITE
;
506 retval
= aarch64_write_dcc(&a8
->armv8_common
, data
);
507 if (retval
!= ERROR_OK
)
510 return aarch64_exec_opcode(
511 a8
->armv8_common
.arm
.target
,
516 static int aarch64_instr_write_data_dcc_64(struct arm_dpm
*dpm
,
517 uint32_t opcode
, uint64_t data
)
519 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
521 uint32_t dscr
= DSCR_ITE
;
523 retval
= aarch64_write_dcc_64(&a8
->armv8_common
, data
);
524 if (retval
!= ERROR_OK
)
527 return aarch64_exec_opcode(
528 a8
->armv8_common
.arm
.target
,
533 static int aarch64_instr_write_data_r0(struct arm_dpm
*dpm
,
534 uint32_t opcode
, uint32_t data
)
536 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
538 uint32_t dscr
= DSCR_ITE
;
541 retval
= aarch64_write_dcc(&a8
->armv8_common
, data
);
542 if (retval
!= ERROR_OK
)
545 retval
= aarch64_exec_opcode(
546 a8
->armv8_common
.arm
.target
, armv8_opcode(&a8
->armv8_common
, READ_REG_DTRRX
), &dscr
);
547 if (retval
!= ERROR_OK
)
550 /* then the opcode, taking data from R0 */
551 retval
= aarch64_exec_opcode(
552 a8
->armv8_common
.arm
.target
,
559 static int aarch64_instr_write_data_r0_64(struct arm_dpm
*dpm
,
560 uint32_t opcode
, uint64_t data
)
562 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
563 uint32_t dscr
= DSCR_ITE
;
566 retval
= aarch64_write_dcc_64(&a8
->armv8_common
, data
);
567 if (retval
!= ERROR_OK
)
570 retval
= aarch64_exec_opcode(
571 a8
->armv8_common
.arm
.target
,
572 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0
, 0),
574 if (retval
!= ERROR_OK
)
577 /* then the opcode, taking data from R0 */
578 retval
= aarch64_exec_opcode(
579 a8
->armv8_common
.arm
.target
,
586 static int aarch64_instr_cpsr_sync(struct arm_dpm
*dpm
)
588 struct target
*target
= dpm
->arm
->target
;
589 struct armv8_common
*armv8
= target_to_armv8(target
);
590 uint32_t dscr
= DSCR_ITE
;
592 /* "Prefetch flush" after modifying execution status in CPSR */
593 return aarch64_exec_opcode(target
, armv8_opcode(armv8
, ARMV8_OPC_DSB_SY
), &dscr
);
596 static int aarch64_instr_read_data_dcc(struct arm_dpm
*dpm
,
597 uint32_t opcode
, uint32_t *data
)
599 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
601 uint32_t dscr
= DSCR_ITE
;
603 /* the opcode, writing data to DCC */
604 retval
= aarch64_exec_opcode(
605 a8
->armv8_common
.arm
.target
,
608 if (retval
!= ERROR_OK
)
611 return aarch64_read_dcc(&a8
->armv8_common
, data
, &dscr
);
614 static int aarch64_instr_read_data_dcc_64(struct arm_dpm
*dpm
,
615 uint32_t opcode
, uint64_t *data
)
617 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
619 uint32_t dscr
= DSCR_ITE
;
621 /* the opcode, writing data to DCC */
622 retval
= aarch64_exec_opcode(
623 a8
->armv8_common
.arm
.target
,
626 if (retval
!= ERROR_OK
)
629 return aarch64_read_dcc_64(&a8
->armv8_common
, data
, &dscr
);
632 static int aarch64_instr_read_data_r0(struct arm_dpm
*dpm
,
633 uint32_t opcode
, uint32_t *data
)
635 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
636 uint32_t dscr
= DSCR_ITE
;
639 /* the opcode, writing data to R0 */
640 retval
= aarch64_exec_opcode(
641 a8
->armv8_common
.arm
.target
,
644 if (retval
!= ERROR_OK
)
647 /* write R0 to DCC */
648 retval
= aarch64_exec_opcode(
649 a8
->armv8_common
.arm
.target
, armv8_opcode(&a8
->armv8_common
, WRITE_REG_DTRTX
), &dscr
);
650 if (retval
!= ERROR_OK
)
653 return aarch64_read_dcc(&a8
->armv8_common
, data
, &dscr
);
656 static int aarch64_instr_read_data_r0_64(struct arm_dpm
*dpm
,
657 uint32_t opcode
, uint64_t *data
)
659 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
660 uint32_t dscr
= DSCR_ITE
;
663 /* the opcode, writing data to R0 */
664 retval
= aarch64_exec_opcode(
665 a8
->armv8_common
.arm
.target
,
668 if (retval
!= ERROR_OK
)
671 /* write R0 to DCC */
672 retval
= aarch64_exec_opcode(
673 a8
->armv8_common
.arm
.target
,
674 ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0
, 0), /* msr dbgdtr_el0, x0 */
676 if (retval
!= ERROR_OK
)
679 return aarch64_read_dcc_64(&a8
->armv8_common
, data
, &dscr
);
682 static int aarch64_bpwp_enable(struct arm_dpm
*dpm
, unsigned index_t
,
683 uint32_t addr
, uint32_t control
)
685 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
686 uint32_t vr
= a8
->armv8_common
.debug_base
;
687 uint32_t cr
= a8
->armv8_common
.debug_base
;
691 case 0 ... 15: /* breakpoints */
692 vr
+= CPUV8_DBG_BVR_BASE
;
693 cr
+= CPUV8_DBG_BCR_BASE
;
695 case 16 ... 31: /* watchpoints */
696 vr
+= CPUV8_DBG_WVR_BASE
;
697 cr
+= CPUV8_DBG_WCR_BASE
;
706 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
707 (unsigned) vr
, (unsigned) cr
);
709 retval
= aarch64_dap_write_memap_register_u32(dpm
->arm
->target
,
711 if (retval
!= ERROR_OK
)
713 retval
= aarch64_dap_write_memap_register_u32(dpm
->arm
->target
,
718 static int aarch64_bpwp_disable(struct arm_dpm
*dpm
, unsigned index_t
)
720 struct aarch64_common
*a
= dpm_to_a8(dpm
);
725 cr
= a
->armv8_common
.debug_base
+ CPUV8_DBG_BCR_BASE
;
728 cr
= a
->armv8_common
.debug_base
+ CPUV8_DBG_WCR_BASE
;
736 LOG_DEBUG("A: bpwp disable, cr %08x", (unsigned) cr
);
738 /* clear control register */
739 return aarch64_dap_write_memap_register_u32(dpm
->arm
->target
, cr
, 0);
743 static int aarch64_dpm_setup(struct aarch64_common
*a8
, uint64_t debug
)
745 struct arm_dpm
*dpm
= &a8
->armv8_common
.dpm
;
748 dpm
->arm
= &a8
->armv8_common
.arm
;
751 dpm
->prepare
= aarch64_dpm_prepare
;
752 dpm
->finish
= aarch64_dpm_finish
;
754 dpm
->instr_execute
= aarch64_instr_execute
;
755 dpm
->instr_write_data_dcc
= aarch64_instr_write_data_dcc
;
756 dpm
->instr_write_data_dcc_64
= aarch64_instr_write_data_dcc_64
;
757 dpm
->instr_write_data_r0
= aarch64_instr_write_data_r0
;
758 dpm
->instr_write_data_r0_64
= aarch64_instr_write_data_r0_64
;
759 dpm
->instr_cpsr_sync
= aarch64_instr_cpsr_sync
;
761 dpm
->instr_read_data_dcc
= aarch64_instr_read_data_dcc
;
762 dpm
->instr_read_data_dcc_64
= aarch64_instr_read_data_dcc_64
;
763 dpm
->instr_read_data_r0
= aarch64_instr_read_data_r0
;
764 dpm
->instr_read_data_r0_64
= aarch64_instr_read_data_r0_64
;
766 dpm
->arm_reg_current
= armv8_reg_current
;
768 dpm
->bpwp_enable
= aarch64_bpwp_enable
;
769 dpm
->bpwp_disable
= aarch64_bpwp_disable
;
771 retval
= armv8_dpm_setup(dpm
);
772 if (retval
== ERROR_OK
)
773 retval
= armv8_dpm_initialize(dpm
);
777 static struct target
*get_aarch64(struct target
*target
, int32_t coreid
)
779 struct target_list
*head
;
783 while (head
!= (struct target_list
*)NULL
) {
785 if ((curr
->coreid
== coreid
) && (curr
->state
== TARGET_HALTED
))
791 static int aarch64_halt(struct target
*target
);
793 static int aarch64_halt_smp(struct target
*target
)
795 int retval
= ERROR_OK
;
796 struct target_list
*head
= target
->head
;
798 while (head
!= (struct target_list
*)NULL
) {
799 struct target
*curr
= head
->target
;
800 struct armv8_common
*armv8
= target_to_armv8(curr
);
802 /* open the gate for channel 0 to let HALT requests pass to the CTM */
804 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
805 armv8
->cti_base
+ CTI_GATE
, CTI_CHNL(0));
806 if (retval
!= ERROR_OK
)
812 /* halt the target PE */
813 if (retval
== ERROR_OK
)
814 retval
= aarch64_halt(target
);
819 static int update_halt_gdb(struct target
*target
)
822 if (target
->gdb_service
&& target
->gdb_service
->core
[0] == -1) {
823 target
->gdb_service
->target
= target
;
824 target
->gdb_service
->core
[0] = target
->coreid
;
825 retval
+= aarch64_halt_smp(target
);
831 * Cortex-A8 Run control
834 static int aarch64_poll(struct target
*target
)
836 int retval
= ERROR_OK
;
838 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
839 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
840 enum target_state prev_target_state
= target
->state
;
841 /* toggle to another core is done by gdb as follow */
842 /* maint packet J core_id */
844 /* the next polling trigger an halt event sent to gdb */
845 if ((target
->state
== TARGET_HALTED
) && (target
->smp
) &&
846 (target
->gdb_service
) &&
847 (target
->gdb_service
->target
== NULL
)) {
848 target
->gdb_service
->target
=
849 get_aarch64(target
, target
->gdb_service
->core
[1]);
850 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
853 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
854 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
855 if (retval
!= ERROR_OK
)
857 aarch64
->cpudbg_dscr
= dscr
;
859 if (DSCR_RUN_MODE(dscr
) == 0x3) {
860 if (prev_target_state
!= TARGET_HALTED
) {
861 /* We have a halting debug event */
862 LOG_DEBUG("Target halted");
863 target
->state
= TARGET_HALTED
;
864 if ((prev_target_state
== TARGET_RUNNING
)
865 || (prev_target_state
== TARGET_UNKNOWN
)
866 || (prev_target_state
== TARGET_RESET
)) {
867 retval
= aarch64_debug_entry(target
);
868 if (retval
!= ERROR_OK
)
871 retval
= update_halt_gdb(target
);
872 if (retval
!= ERROR_OK
)
875 target_call_event_callbacks(target
,
876 TARGET_EVENT_HALTED
);
878 if (prev_target_state
== TARGET_DEBUG_RUNNING
) {
881 retval
= aarch64_debug_entry(target
);
882 if (retval
!= ERROR_OK
)
885 retval
= update_halt_gdb(target
);
886 if (retval
!= ERROR_OK
)
890 target_call_event_callbacks(target
,
891 TARGET_EVENT_DEBUG_HALTED
);
895 target
->state
= TARGET_RUNNING
;
900 static int aarch64_halt(struct target
*target
)
902 int retval
= ERROR_OK
;
904 struct armv8_common
*armv8
= target_to_armv8(target
);
907 * add HDE in halting debug mode
909 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
910 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
911 if (retval
== ERROR_OK
)
912 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
913 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
| DSCR_HDE
);
914 if (retval
!= ERROR_OK
)
917 /* trigger an event on channel 0, this outputs a halt request to the PE */
918 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
919 armv8
->cti_base
+ CTI_APPPULSE
, CTI_CHNL(0));
920 if (retval
!= ERROR_OK
)
923 long long then
= timeval_ms();
925 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
926 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
927 if (retval
!= ERROR_OK
)
929 if ((dscr
& DSCRV8_HALT_MASK
) != 0)
931 if (timeval_ms() > then
+ 1000) {
932 LOG_ERROR("Timeout waiting for halt");
937 target
->debug_reason
= DBG_REASON_DBGRQ
;
942 static int aarch64_internal_restore(struct target
*target
, int current
,
943 uint64_t *address
, int handle_breakpoints
, int debug_execution
)
945 struct armv8_common
*armv8
= target_to_armv8(target
);
946 struct arm
*arm
= &armv8
->arm
;
950 if (!debug_execution
)
951 target_free_all_working_areas(target
);
953 /* current = 1: continue on current pc, otherwise continue at <address> */
954 resume_pc
= buf_get_u64(arm
->pc
->value
, 0, 64);
956 resume_pc
= *address
;
958 *address
= resume_pc
;
960 /* Make sure that the Armv7 gdb thumb fixups does not
961 * kill the return address
963 switch (arm
->core_state
) {
965 resume_pc
&= 0xFFFFFFFC;
967 case ARM_STATE_AARCH64
:
968 resume_pc
&= 0xFFFFFFFFFFFFFFFC;
970 case ARM_STATE_THUMB
:
971 case ARM_STATE_THUMB_EE
:
972 /* When the return address is loaded into PC
973 * bit 0 must be 1 to stay in Thumb state
977 case ARM_STATE_JAZELLE
:
978 LOG_ERROR("How do I resume into Jazelle state??");
981 LOG_DEBUG("resume pc = 0x%16" PRIx64
, resume_pc
);
982 buf_set_u64(arm
->pc
->value
, 0, 64, resume_pc
);
985 dpmv8_modeswitch(&armv8
->dpm
, ARM_MODE_ANY
);
987 /* called it now before restoring context because it uses cpu
988 * register r0 for restoring system control register */
989 retval
= aarch64_restore_system_control_reg(target
);
990 if (retval
!= ERROR_OK
)
992 retval
= aarch64_restore_context(target
, handle_breakpoints
);
993 if (retval
!= ERROR_OK
)
995 target
->debug_reason
= DBG_REASON_NOTHALTED
;
996 target
->state
= TARGET_RUNNING
;
998 /* registers are now invalid */
999 register_cache_invalidate(arm
->core_cache
);
1004 static int aarch64_internal_restart(struct target
*target
, bool slave_pe
)
1006 struct armv8_common
*armv8
= target_to_armv8(target
);
1007 struct arm
*arm
= &armv8
->arm
;
1011 * * Restart core and wait for it to be started. Clear ITRen and sticky
1012 * * exception flags: see ARMv7 ARM, C5.9.
1014 * REVISIT: for single stepping, we probably want to
1015 * disable IRQs by default, with optional override...
1018 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1019 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1020 if (retval
!= ERROR_OK
)
1023 if ((dscr
& DSCR_ITE
) == 0)
1024 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
1026 /* make sure to acknowledge the halt event before resuming */
1027 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1028 armv8
->cti_base
+ CTI_INACK
, CTI_TRIG(HALT
));
1031 * open the CTI gate for channel 1 so that the restart events
1032 * get passed along to all PEs
1034 if (retval
== ERROR_OK
)
1035 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1036 armv8
->cti_base
+ CTI_GATE
, CTI_CHNL(1));
1037 if (retval
!= ERROR_OK
)
1041 /* trigger an event on channel 1, generates a restart request to the PE */
1042 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1043 armv8
->cti_base
+ CTI_APPPULSE
, CTI_CHNL(1));
1044 if (retval
!= ERROR_OK
)
1047 long long then
= timeval_ms();
1049 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1050 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1051 if (retval
!= ERROR_OK
)
1053 if ((dscr
& DSCR_HDE
) != 0)
1055 if (timeval_ms() > then
+ 1000) {
1056 LOG_ERROR("Timeout waiting for resume");
1062 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1063 target
->state
= TARGET_RUNNING
;
1065 /* registers are now invalid */
1066 register_cache_invalidate(arm
->core_cache
);
1071 static int aarch64_restore_smp(struct target
*target
, int handle_breakpoints
)
1074 struct target_list
*head
;
1075 struct target
*curr
;
1077 head
= target
->head
;
1078 while (head
!= (struct target_list
*)NULL
) {
1079 curr
= head
->target
;
1080 if ((curr
!= target
) && (curr
->state
!= TARGET_RUNNING
)) {
1081 /* resume current address , not in step mode */
1082 retval
+= aarch64_internal_restore(curr
, 1, &address
,
1083 handle_breakpoints
, 0);
1084 retval
+= aarch64_internal_restart(curr
, true);
1092 static int aarch64_resume(struct target
*target
, int current
,
1093 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
1096 uint64_t addr
= address
;
1098 /* dummy resume for smp toggle in order to reduce gdb impact */
1099 if ((target
->smp
) && (target
->gdb_service
->core
[1] != -1)) {
1100 /* simulate a start and halt of target */
1101 target
->gdb_service
->target
= NULL
;
1102 target
->gdb_service
->core
[0] = target
->gdb_service
->core
[1];
1103 /* fake resume at next poll we play the target core[1], see poll*/
1104 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1107 aarch64_internal_restore(target
, current
, &addr
, handle_breakpoints
,
1110 target
->gdb_service
->core
[0] = -1;
1111 retval
= aarch64_restore_smp(target
, handle_breakpoints
);
1112 if (retval
!= ERROR_OK
)
1115 aarch64_internal_restart(target
, false);
1117 if (!debug_execution
) {
1118 target
->state
= TARGET_RUNNING
;
1119 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1120 LOG_DEBUG("target resumed at 0x%" PRIx64
, addr
);
1122 target
->state
= TARGET_DEBUG_RUNNING
;
1123 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1124 LOG_DEBUG("target debug resumed at 0x%" PRIx64
, addr
);
1130 static int aarch64_debug_entry(struct target
*target
)
1132 int retval
= ERROR_OK
;
1133 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1134 struct armv8_common
*armv8
= target_to_armv8(target
);
1136 LOG_DEBUG("dscr = 0x%08" PRIx32
, aarch64
->cpudbg_dscr
);
1138 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
1139 * imprecise data aborts get discarded by issuing a Data
1140 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
1143 /* make sure to clear all sticky errors */
1144 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1145 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
1146 if (retval
!= ERROR_OK
)
1149 /* Examine debug reason */
1150 armv8_dpm_report_dscr(&armv8
->dpm
, aarch64
->cpudbg_dscr
);
1152 /* save address of instruction that triggered the watchpoint? */
1153 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
1157 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1158 armv8
->debug_base
+ CPUV8_DBG_WFAR1
,
1160 if (retval
!= ERROR_OK
)
1163 wfar
= (wfar
<< 32);
1164 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1165 armv8
->debug_base
+ CPUV8_DBG_WFAR0
,
1167 if (retval
!= ERROR_OK
)
1170 armv8_dpm_report_wfar(&armv8
->dpm
, wfar
);
1173 retval
= armv8_dpm_read_current_registers(&armv8
->dpm
);
1175 if (armv8
->post_debug_entry
) {
1176 retval
= armv8
->post_debug_entry(target
);
1177 if (retval
!= ERROR_OK
)
1184 static int aarch64_post_debug_entry(struct target
*target
)
1186 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1187 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1190 /* clear sticky errors */
1191 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1192 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
1194 switch (armv8
->arm
.core_mode
) {
1198 retval
= armv8
->arm
.mrs(target
, 3, /*op 0*/
1199 0, 0, /* op1, op2 */
1200 1, 0, /* CRn, CRm */
1201 &aarch64
->system_control_reg
);
1202 if (retval
!= ERROR_OK
)
1207 retval
= armv8
->arm
.mrs(target
, 3, /*op 0*/
1208 4, 0, /* op1, op2 */
1209 1, 0, /* CRn, CRm */
1210 &aarch64
->system_control_reg
);
1211 if (retval
!= ERROR_OK
)
1216 retval
= armv8
->arm
.mrs(target
, 3, /*op 0*/
1217 6, 0, /* op1, op2 */
1218 1, 0, /* CRn, CRm */
1219 &aarch64
->system_control_reg
);
1220 if (retval
!= ERROR_OK
)
1224 retval
= armv8
->arm
.mrc(target
, 15, 0, 0, 1, 0, &aarch64
->system_control_reg
);
1225 if (retval
!= ERROR_OK
)
1230 LOG_DEBUG("System_register: %8.8" PRIx32
, aarch64
->system_control_reg
);
1231 aarch64
->system_control_reg_curr
= aarch64
->system_control_reg
;
1233 if (armv8
->armv8_mmu
.armv8_cache
.ctype
== -1)
1234 armv8_identify_cache(target
);
1236 armv8
->armv8_mmu
.mmu_enabled
=
1237 (aarch64
->system_control_reg
& 0x1U
) ? 1 : 0;
1238 armv8
->armv8_mmu
.armv8_cache
.d_u_cache_enabled
=
1239 (aarch64
->system_control_reg
& 0x4U
) ? 1 : 0;
1240 armv8
->armv8_mmu
.armv8_cache
.i_cache_enabled
=
1241 (aarch64
->system_control_reg
& 0x1000U
) ? 1 : 0;
1242 aarch64
->curr_mode
= armv8
->arm
.core_mode
;
1246 static int aarch64_set_dscr_bits(struct target
*target
, unsigned long bit_mask
, unsigned long value
)
1248 struct armv8_common
*armv8
= target_to_armv8(target
);
1252 int retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1253 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1254 if (ERROR_OK
!= retval
)
1257 /* clear bitfield */
1260 dscr
|= value
& bit_mask
;
1262 /* write new DSCR */
1263 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1264 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1268 static int aarch64_step(struct target
*target
, int current
, target_addr_t address
,
1269 int handle_breakpoints
)
1271 struct armv8_common
*armv8
= target_to_armv8(target
);
1275 if (target
->state
!= TARGET_HALTED
) {
1276 LOG_WARNING("target not halted");
1277 return ERROR_TARGET_NOT_HALTED
;
1280 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1281 armv8
->debug_base
+ CPUV8_DBG_EDECR
, &edecr
);
1282 if (retval
!= ERROR_OK
)
1285 /* make sure EDECR.SS is not set when restoring the register */
1288 /* set EDECR.SS to enter hardware step mode */
1289 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1290 armv8
->debug_base
+ CPUV8_DBG_EDECR
, (edecr
|0x4));
1291 if (retval
!= ERROR_OK
)
1294 /* disable interrupts while stepping */
1295 retval
= aarch64_set_dscr_bits(target
, 0x3 << 22, 0x3 << 22);
1296 if (retval
!= ERROR_OK
)
1299 /* resume the target */
1300 retval
= aarch64_resume(target
, current
, address
, 0, 0);
1301 if (retval
!= ERROR_OK
)
1304 long long then
= timeval_ms();
1305 while (target
->state
!= TARGET_HALTED
) {
1306 retval
= aarch64_poll(target
);
1307 if (retval
!= ERROR_OK
)
1309 if (timeval_ms() > then
+ 1000) {
1310 LOG_ERROR("timeout waiting for target halt");
1316 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1317 armv8
->debug_base
+ CPUV8_DBG_EDECR
, edecr
);
1318 if (retval
!= ERROR_OK
)
1321 /* restore interrupts */
1322 retval
= aarch64_set_dscr_bits(target
, 0x3 << 22, 0);
1323 if (retval
!= ERROR_OK
)
1329 static int aarch64_restore_context(struct target
*target
, bool bpwp
)
1331 struct armv8_common
*armv8
= target_to_armv8(target
);
1335 if (armv8
->pre_restore_context
)
1336 armv8
->pre_restore_context(target
);
1338 return armv8_dpm_write_dirty_registers(&armv8
->dpm
, bpwp
);
1343 * Cortex-A8 Breakpoint and watchpoint functions
1346 /* Setup hardware Breakpoint Register Pair */
1347 static int aarch64_set_breakpoint(struct target
*target
,
1348 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1353 uint8_t byte_addr_select
= 0x0F;
1354 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1355 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1356 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1359 if (breakpoint
->set
) {
1360 LOG_WARNING("breakpoint already set");
1364 if (breakpoint
->type
== BKPT_HARD
) {
1366 while (brp_list
[brp_i
].used
&& (brp_i
< aarch64
->brp_num
))
1368 if (brp_i
>= aarch64
->brp_num
) {
1369 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1370 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1372 breakpoint
->set
= brp_i
+ 1;
1373 if (breakpoint
->length
== 2)
1374 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1375 control
= ((matchmode
& 0x7) << 20)
1377 | (byte_addr_select
<< 5)
1379 brp_list
[brp_i
].used
= 1;
1380 brp_list
[brp_i
].value
= breakpoint
->address
& 0xFFFFFFFFFFFFFFFC;
1381 brp_list
[brp_i
].control
= control
;
1382 bpt_value
= brp_list
[brp_i
].value
;
1384 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1385 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1386 (uint32_t)(bpt_value
& 0xFFFFFFFF));
1387 if (retval
!= ERROR_OK
)
1389 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1390 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1391 (uint32_t)(bpt_value
>> 32));
1392 if (retval
!= ERROR_OK
)
1395 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1396 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1397 brp_list
[brp_i
].control
);
1398 if (retval
!= ERROR_OK
)
1400 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1401 brp_list
[brp_i
].control
,
1402 brp_list
[brp_i
].value
);
1404 } else if (breakpoint
->type
== BKPT_SOFT
) {
1407 buf_set_u32(code
, 0, 32, ARMV8_HLT(0x11));
1408 retval
= target_read_memory(target
,
1409 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1410 breakpoint
->length
, 1,
1411 breakpoint
->orig_instr
);
1412 if (retval
!= ERROR_OK
)
1415 armv8_cache_d_inner_flush_virt(armv8
,
1416 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1417 breakpoint
->length
);
1419 retval
= target_write_memory(target
,
1420 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1421 breakpoint
->length
, 1, code
);
1422 if (retval
!= ERROR_OK
)
1425 armv8_cache_d_inner_flush_virt(armv8
,
1426 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1427 breakpoint
->length
);
1429 armv8_cache_i_inner_inval_virt(armv8
,
1430 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1431 breakpoint
->length
);
1433 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1436 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1437 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1438 /* Ensure that halting debug mode is enable */
1439 dscr
= dscr
| DSCR_HDE
;
1440 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1441 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1442 if (retval
!= ERROR_OK
) {
1443 LOG_DEBUG("Failed to set DSCR.HDE");
1450 static int aarch64_set_context_breakpoint(struct target
*target
,
1451 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1453 int retval
= ERROR_FAIL
;
1456 uint8_t byte_addr_select
= 0x0F;
1457 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1458 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1459 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1461 if (breakpoint
->set
) {
1462 LOG_WARNING("breakpoint already set");
1465 /*check available context BRPs*/
1466 while ((brp_list
[brp_i
].used
||
1467 (brp_list
[brp_i
].type
!= BRP_CONTEXT
)) && (brp_i
< aarch64
->brp_num
))
1470 if (brp_i
>= aarch64
->brp_num
) {
1471 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1475 breakpoint
->set
= brp_i
+ 1;
1476 control
= ((matchmode
& 0x7) << 20)
1478 | (byte_addr_select
<< 5)
1480 brp_list
[brp_i
].used
= 1;
1481 brp_list
[brp_i
].value
= (breakpoint
->asid
);
1482 brp_list
[brp_i
].control
= control
;
1483 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1484 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1485 brp_list
[brp_i
].value
);
1486 if (retval
!= ERROR_OK
)
1488 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1489 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1490 brp_list
[brp_i
].control
);
1491 if (retval
!= ERROR_OK
)
1493 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1494 brp_list
[brp_i
].control
,
1495 brp_list
[brp_i
].value
);
1500 static int aarch64_set_hybrid_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1502 int retval
= ERROR_FAIL
;
1503 int brp_1
= 0; /* holds the contextID pair */
1504 int brp_2
= 0; /* holds the IVA pair */
1505 uint32_t control_CTX
, control_IVA
;
1506 uint8_t CTX_byte_addr_select
= 0x0F;
1507 uint8_t IVA_byte_addr_select
= 0x0F;
1508 uint8_t CTX_machmode
= 0x03;
1509 uint8_t IVA_machmode
= 0x01;
1510 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1511 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1512 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1514 if (breakpoint
->set
) {
1515 LOG_WARNING("breakpoint already set");
1518 /*check available context BRPs*/
1519 while ((brp_list
[brp_1
].used
||
1520 (brp_list
[brp_1
].type
!= BRP_CONTEXT
)) && (brp_1
< aarch64
->brp_num
))
1523 printf("brp(CTX) found num: %d\n", brp_1
);
1524 if (brp_1
>= aarch64
->brp_num
) {
1525 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1529 while ((brp_list
[brp_2
].used
||
1530 (brp_list
[brp_2
].type
!= BRP_NORMAL
)) && (brp_2
< aarch64
->brp_num
))
1533 printf("brp(IVA) found num: %d\n", brp_2
);
1534 if (brp_2
>= aarch64
->brp_num
) {
1535 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1539 breakpoint
->set
= brp_1
+ 1;
1540 breakpoint
->linked_BRP
= brp_2
;
1541 control_CTX
= ((CTX_machmode
& 0x7) << 20)
1544 | (CTX_byte_addr_select
<< 5)
1546 brp_list
[brp_1
].used
= 1;
1547 brp_list
[brp_1
].value
= (breakpoint
->asid
);
1548 brp_list
[brp_1
].control
= control_CTX
;
1549 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1550 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_1
].BRPn
,
1551 brp_list
[brp_1
].value
);
1552 if (retval
!= ERROR_OK
)
1554 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1555 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_1
].BRPn
,
1556 brp_list
[brp_1
].control
);
1557 if (retval
!= ERROR_OK
)
1560 control_IVA
= ((IVA_machmode
& 0x7) << 20)
1563 | (IVA_byte_addr_select
<< 5)
1565 brp_list
[brp_2
].used
= 1;
1566 brp_list
[brp_2
].value
= breakpoint
->address
& 0xFFFFFFFFFFFFFFFC;
1567 brp_list
[brp_2
].control
= control_IVA
;
1568 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1569 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_2
].BRPn
,
1570 brp_list
[brp_2
].value
& 0xFFFFFFFF);
1571 if (retval
!= ERROR_OK
)
1573 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1574 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_2
].BRPn
,
1575 brp_list
[brp_2
].value
>> 32);
1576 if (retval
!= ERROR_OK
)
1578 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1579 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_2
].BRPn
,
1580 brp_list
[brp_2
].control
);
1581 if (retval
!= ERROR_OK
)
1587 static int aarch64_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1590 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1591 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1592 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1594 if (!breakpoint
->set
) {
1595 LOG_WARNING("breakpoint not set");
1599 if (breakpoint
->type
== BKPT_HARD
) {
1600 if ((breakpoint
->address
!= 0) && (breakpoint
->asid
!= 0)) {
1601 int brp_i
= breakpoint
->set
- 1;
1602 int brp_j
= breakpoint
->linked_BRP
;
1603 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1604 LOG_DEBUG("Invalid BRP number in breakpoint");
1607 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1608 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1609 brp_list
[brp_i
].used
= 0;
1610 brp_list
[brp_i
].value
= 0;
1611 brp_list
[brp_i
].control
= 0;
1612 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1613 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1614 brp_list
[brp_i
].control
);
1615 if (retval
!= ERROR_OK
)
1617 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1618 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1619 (uint32_t)brp_list
[brp_i
].value
);
1620 if (retval
!= ERROR_OK
)
1622 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1623 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1624 (uint32_t)brp_list
[brp_i
].value
);
1625 if (retval
!= ERROR_OK
)
1627 if ((brp_j
< 0) || (brp_j
>= aarch64
->brp_num
)) {
1628 LOG_DEBUG("Invalid BRP number in breakpoint");
1631 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_j
,
1632 brp_list
[brp_j
].control
, brp_list
[brp_j
].value
);
1633 brp_list
[brp_j
].used
= 0;
1634 brp_list
[brp_j
].value
= 0;
1635 brp_list
[brp_j
].control
= 0;
1636 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1637 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_j
].BRPn
,
1638 brp_list
[brp_j
].control
);
1639 if (retval
!= ERROR_OK
)
1641 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1642 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_j
].BRPn
,
1643 (uint32_t)brp_list
[brp_j
].value
);
1644 if (retval
!= ERROR_OK
)
1646 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1647 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_j
].BRPn
,
1648 (uint32_t)brp_list
[brp_j
].value
);
1649 if (retval
!= ERROR_OK
)
1652 breakpoint
->linked_BRP
= 0;
1653 breakpoint
->set
= 0;
1657 int brp_i
= breakpoint
->set
- 1;
1658 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1659 LOG_DEBUG("Invalid BRP number in breakpoint");
1662 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_i
,
1663 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1664 brp_list
[brp_i
].used
= 0;
1665 brp_list
[brp_i
].value
= 0;
1666 brp_list
[brp_i
].control
= 0;
1667 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1668 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1669 brp_list
[brp_i
].control
);
1670 if (retval
!= ERROR_OK
)
1672 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1673 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1674 brp_list
[brp_i
].value
);
1675 if (retval
!= ERROR_OK
)
1678 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1679 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1680 (uint32_t)brp_list
[brp_i
].value
);
1681 if (retval
!= ERROR_OK
)
1683 breakpoint
->set
= 0;
1687 /* restore original instruction (kept in target endianness) */
1689 armv8_cache_d_inner_flush_virt(armv8
,
1690 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1691 breakpoint
->length
);
1693 if (breakpoint
->length
== 4) {
1694 retval
= target_write_memory(target
,
1695 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1696 4, 1, breakpoint
->orig_instr
);
1697 if (retval
!= ERROR_OK
)
1700 retval
= target_write_memory(target
,
1701 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1702 2, 1, breakpoint
->orig_instr
);
1703 if (retval
!= ERROR_OK
)
1707 armv8_cache_d_inner_flush_virt(armv8
,
1708 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1709 breakpoint
->length
);
1711 armv8_cache_i_inner_inval_virt(armv8
,
1712 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1713 breakpoint
->length
);
1715 breakpoint
->set
= 0;
1720 static int aarch64_add_breakpoint(struct target
*target
,
1721 struct breakpoint
*breakpoint
)
1723 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1725 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1726 LOG_INFO("no hardware breakpoint available");
1727 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1730 if (breakpoint
->type
== BKPT_HARD
)
1731 aarch64
->brp_num_available
--;
1733 return aarch64_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1736 static int aarch64_add_context_breakpoint(struct target
*target
,
1737 struct breakpoint
*breakpoint
)
1739 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1741 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1742 LOG_INFO("no hardware breakpoint available");
1743 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1746 if (breakpoint
->type
== BKPT_HARD
)
1747 aarch64
->brp_num_available
--;
1749 return aarch64_set_context_breakpoint(target
, breakpoint
, 0x02); /* asid match */
1752 static int aarch64_add_hybrid_breakpoint(struct target
*target
,
1753 struct breakpoint
*breakpoint
)
1755 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1757 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1758 LOG_INFO("no hardware breakpoint available");
1759 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1762 if (breakpoint
->type
== BKPT_HARD
)
1763 aarch64
->brp_num_available
--;
1765 return aarch64_set_hybrid_breakpoint(target
, breakpoint
); /* ??? */
1769 static int aarch64_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1771 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1774 /* It is perfectly possible to remove breakpoints while the target is running */
1775 if (target
->state
!= TARGET_HALTED
) {
1776 LOG_WARNING("target not halted");
1777 return ERROR_TARGET_NOT_HALTED
;
1781 if (breakpoint
->set
) {
1782 aarch64_unset_breakpoint(target
, breakpoint
);
1783 if (breakpoint
->type
== BKPT_HARD
)
1784 aarch64
->brp_num_available
++;
1791 * Cortex-A8 Reset functions
1794 static int aarch64_assert_reset(struct target
*target
)
1796 struct armv8_common
*armv8
= target_to_armv8(target
);
1800 /* FIXME when halt is requested, make it work somehow... */
1802 /* Issue some kind of warm reset. */
1803 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
))
1804 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1805 else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1806 /* REVISIT handle "pulls" cases, if there's
1807 * hardware that needs them to work.
1809 jtag_add_reset(0, 1);
1811 LOG_ERROR("%s: how to reset?", target_name(target
));
1815 /* registers are now invalid */
1816 register_cache_invalidate(armv8
->arm
.core_cache
);
1818 target
->state
= TARGET_RESET
;
1823 static int aarch64_deassert_reset(struct target
*target
)
1829 /* be certain SRST is off */
1830 jtag_add_reset(0, 0);
1832 retval
= aarch64_poll(target
);
1833 if (retval
!= ERROR_OK
)
1836 if (target
->reset_halt
) {
1837 if (target
->state
!= TARGET_HALTED
) {
1838 LOG_WARNING("%s: ran after reset and before halt ...",
1839 target_name(target
));
1840 retval
= target_halt(target
);
1841 if (retval
!= ERROR_OK
)
1849 static int aarch64_write_apb_ap_memory(struct target
*target
,
1850 uint64_t address
, uint32_t size
,
1851 uint32_t count
, const uint8_t *buffer
)
1853 /* write memory through APB-AP */
1854 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1855 struct armv8_common
*armv8
= target_to_armv8(target
);
1856 struct arm
*arm
= &armv8
->arm
;
1857 int total_bytes
= count
* size
;
1859 int start_byte
= address
& 0x3;
1860 int end_byte
= (address
+ total_bytes
) & 0x3;
1863 uint8_t *tmp_buff
= NULL
;
1865 LOG_DEBUG("Writing APB-AP memory address 0x%" PRIx64
" size %" PRIu32
" count%" PRIu32
,
1866 address
, size
, count
);
1867 if (target
->state
!= TARGET_HALTED
) {
1868 LOG_WARNING("target not halted");
1869 return ERROR_TARGET_NOT_HALTED
;
1872 total_u32
= DIV_ROUND_UP((address
& 3) + total_bytes
, 4);
1874 /* Mark register R0 as dirty, as it will be used
1875 * for transferring the data.
1876 * It will be restored automatically when exiting
1879 reg
= armv8_reg_current(arm
, 1);
1882 reg
= armv8_reg_current(arm
, 0);
1885 /* clear any abort */
1886 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1887 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
1888 if (retval
!= ERROR_OK
)
1892 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1894 /* The algorithm only copies 32 bit words, so the buffer
1895 * should be expanded to include the words at either end.
1896 * The first and last words will be read first to avoid
1897 * corruption if needed.
1899 tmp_buff
= malloc(total_u32
* 4);
1901 if ((start_byte
!= 0) && (total_u32
> 1)) {
1902 /* First bytes not aligned - read the 32 bit word to avoid corrupting
1903 * the other bytes in the word.
1905 retval
= aarch64_read_apb_ap_memory(target
, (address
& ~0x3), 4, 1, tmp_buff
);
1906 if (retval
!= ERROR_OK
)
1907 goto error_free_buff_w
;
1910 /* If end of write is not aligned, or the write is less than 4 bytes */
1911 if ((end_byte
!= 0) ||
1912 ((total_u32
== 1) && (total_bytes
!= 4))) {
1914 /* Read the last word to avoid corruption during 32 bit write */
1915 int mem_offset
= (total_u32
-1) * 4;
1916 retval
= aarch64_read_apb_ap_memory(target
, (address
& ~0x3) + mem_offset
, 4, 1, &tmp_buff
[mem_offset
]);
1917 if (retval
!= ERROR_OK
)
1918 goto error_free_buff_w
;
1921 /* Copy the write buffer over the top of the temporary buffer */
1922 memcpy(&tmp_buff
[start_byte
], buffer
, total_bytes
);
1924 /* We now have a 32 bit aligned buffer that can be written */
1927 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1928 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1929 if (retval
!= ERROR_OK
)
1930 goto error_free_buff_w
;
1932 /* Set Normal access mode */
1933 dscr
= (dscr
& ~DSCR_MA
);
1934 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1935 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1937 if (arm
->core_state
== ARM_STATE_AARCH64
) {
1938 /* Write X0 with value 'address' using write procedure */
1939 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1940 retval
+= aarch64_write_dcc_64(armv8
, address
& ~0x3ULL
);
1941 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1942 retval
+= aarch64_exec_opcode(target
,
1943 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0
, 0), &dscr
);
1945 /* Write R0 with value 'address' using write procedure */
1946 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
1947 retval
+= aarch64_write_dcc(armv8
, address
& ~0x3ULL
);
1948 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1949 retval
+= aarch64_exec_opcode(target
,
1950 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr
);
1953 /* Step 1.d - Change DCC to memory mode */
1954 dscr
= dscr
| DSCR_MA
;
1955 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1956 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1957 if (retval
!= ERROR_OK
)
1958 goto error_unset_dtr_w
;
1961 /* Step 2.a - Do the write */
1962 retval
= mem_ap_write_buf_noincr(armv8
->debug_ap
,
1963 tmp_buff
, 4, total_u32
, armv8
->debug_base
+ CPUV8_DBG_DTRRX
);
1964 if (retval
!= ERROR_OK
)
1965 goto error_unset_dtr_w
;
1967 /* Step 3.a - Switch DTR mode back to Normal mode */
1968 dscr
= (dscr
& ~DSCR_MA
);
1969 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1970 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1971 if (retval
!= ERROR_OK
)
1972 goto error_unset_dtr_w
;
1974 /* Check for sticky abort flags in the DSCR */
1975 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1976 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1977 if (retval
!= ERROR_OK
)
1978 goto error_free_buff_w
;
1979 if (dscr
& (DSCR_ERR
| DSCR_SYS_ERROR_PEND
)) {
1980 /* Abort occurred - clear it and exit */
1981 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32
, dscr
);
1982 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1983 armv8
->debug_base
+ CPUV8_DBG_DRCR
, 1<<2);
1984 goto error_free_buff_w
;
1992 /* Unset DTR mode */
1993 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1994 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1995 dscr
= (dscr
& ~DSCR_MA
);
1996 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1997 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2004 static int aarch64_read_apb_ap_memory(struct target
*target
,
2005 target_addr_t address
, uint32_t size
,
2006 uint32_t count
, uint8_t *buffer
)
2008 /* read memory through APB-AP */
2009 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
2010 struct armv8_common
*armv8
= target_to_armv8(target
);
2011 struct arm
*arm
= &armv8
->arm
;
2012 int total_bytes
= count
* size
;
2014 int start_byte
= address
& 0x3;
2015 int end_byte
= (address
+ total_bytes
) & 0x3;
2018 uint8_t *tmp_buff
= NULL
;
2022 LOG_DEBUG("Reading APB-AP memory address 0x%" TARGET_PRIxADDR
" size %" PRIu32
" count%" PRIu32
,
2023 address
, size
, count
);
2024 if (target
->state
!= TARGET_HALTED
) {
2025 LOG_WARNING("target not halted");
2026 return ERROR_TARGET_NOT_HALTED
;
2029 total_u32
= DIV_ROUND_UP((address
& 3) + total_bytes
, 4);
2030 /* Mark register X0, X1 as dirty, as it will be used
2031 * for transferring the data.
2032 * It will be restored automatically when exiting
2035 reg
= armv8_reg_current(arm
, 1);
2038 reg
= armv8_reg_current(arm
, 0);
2041 /* clear any abort */
2042 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2043 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
2044 if (retval
!= ERROR_OK
)
2045 goto error_free_buff_r
;
2048 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2049 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2051 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
2053 /* Set Normal access mode */
2054 dscr
= (dscr
& ~DSCR_MA
);
2055 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2056 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2058 if (arm
->core_state
== ARM_STATE_AARCH64
) {
2059 /* Write X0 with value 'address' using write procedure */
2060 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
2061 retval
+= aarch64_write_dcc_64(armv8
, address
& ~0x3ULL
);
2062 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
2063 retval
+= aarch64_exec_opcode(target
, ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0
, 0), &dscr
);
2064 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2065 retval
+= aarch64_exec_opcode(target
, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0
, 0), &dscr
);
2066 /* Step 1.e - Change DCC to memory mode */
2067 dscr
= dscr
| DSCR_MA
;
2068 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2069 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2070 /* Step 1.f - read DBGDTRTX and discard the value */
2071 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2072 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
2074 /* Write R0 with value 'address' using write procedure */
2075 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
2076 retval
+= aarch64_write_dcc(armv8
, address
& ~0x3ULL
);
2077 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
2078 retval
+= aarch64_exec_opcode(target
,
2079 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr
);
2080 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2081 retval
+= aarch64_exec_opcode(target
,
2082 T32_FMTITR(ARMV4_5_MCR(14, 0, 0, 0, 5, 0)), &dscr
);
2083 /* Step 1.e - Change DCC to memory mode */
2084 dscr
= dscr
| DSCR_MA
;
2085 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2086 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2087 /* Step 1.f - read DBGDTRTX and discard the value */
2088 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2089 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
2092 if (retval
!= ERROR_OK
)
2093 goto error_unset_dtr_r
;
2095 /* Optimize the read as much as we can, either way we read in a single pass */
2096 if ((start_byte
) || (end_byte
)) {
2097 /* The algorithm only copies 32 bit words, so the buffer
2098 * should be expanded to include the words at either end.
2099 * The first and last words will be read into a temp buffer
2100 * to avoid corruption
2102 tmp_buff
= malloc(total_u32
* 4);
2104 goto error_unset_dtr_r
;
2106 /* use the tmp buffer to read the entire data */
2107 u8buf_ptr
= tmp_buff
;
2109 /* address and read length are aligned so read directly into the passed buffer */
2112 /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
2113 * Abort flags are sticky, so can be read at end of transactions
2115 * This data is read in aligned to 32 bit boundary.
2118 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
2119 * increments X0 by 4. */
2120 retval
= mem_ap_read_buf_noincr(armv8
->debug_ap
, u8buf_ptr
, 4, total_u32
-1,
2121 armv8
->debug_base
+ CPUV8_DBG_DTRTX
);
2122 if (retval
!= ERROR_OK
)
2123 goto error_unset_dtr_r
;
2125 /* Step 3.a - set DTR access mode back to Normal mode */
2126 dscr
= (dscr
& ~DSCR_MA
);
2127 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2128 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2129 if (retval
!= ERROR_OK
)
2130 goto error_free_buff_r
;
2132 /* Step 3.b - read DBGDTRTX for the final value */
2133 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2134 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
2135 memcpy(u8buf_ptr
+ (total_u32
-1) * 4, &value
, 4);
2137 /* Check for sticky abort flags in the DSCR */
2138 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2139 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2140 if (retval
!= ERROR_OK
)
2141 goto error_free_buff_r
;
2142 if (dscr
& (DSCR_ERR
| DSCR_SYS_ERROR_PEND
)) {
2143 /* Abort occurred - clear it and exit */
2144 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32
, dscr
);
2145 mem_ap_write_atomic_u32(armv8
->debug_ap
,
2146 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
2147 goto error_free_buff_r
;
2150 /* check if we need to copy aligned data by applying any shift necessary */
2152 memcpy(buffer
, tmp_buff
+ start_byte
, total_bytes
);
2160 /* Unset DTR mode */
2161 mem_ap_read_atomic_u32(armv8
->debug_ap
,
2162 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2163 dscr
= (dscr
& ~DSCR_MA
);
2164 mem_ap_write_atomic_u32(armv8
->debug_ap
,
2165 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
2172 static int aarch64_read_phys_memory(struct target
*target
,
2173 target_addr_t address
, uint32_t size
,
2174 uint32_t count
, uint8_t *buffer
)
2176 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
2177 LOG_DEBUG("Reading memory at real address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
,
2178 address
, size
, count
);
2180 if (count
&& buffer
) {
2181 /* read memory through APB-AP */
2182 retval
= aarch64_mmu_modify(target
, 0);
2183 if (retval
!= ERROR_OK
)
2185 retval
= aarch64_read_apb_ap_memory(target
, address
, size
, count
, buffer
);
2190 static int aarch64_read_memory(struct target
*target
, target_addr_t address
,
2191 uint32_t size
, uint32_t count
, uint8_t *buffer
)
2193 int mmu_enabled
= 0;
2196 /* aarch64 handles unaligned memory access */
2197 LOG_DEBUG("Reading memory at address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
, address
,
2200 /* determine if MMU was enabled on target stop */
2201 retval
= aarch64_mmu(target
, &mmu_enabled
);
2202 if (retval
!= ERROR_OK
)
2206 retval
= aarch64_check_address(target
, address
);
2207 if (retval
!= ERROR_OK
)
2209 /* enable MMU as we could have disabled it for phys access */
2210 retval
= aarch64_mmu_modify(target
, 1);
2211 if (retval
!= ERROR_OK
)
2214 return aarch64_read_apb_ap_memory(target
, address
, size
, count
, buffer
);
2217 static int aarch64_write_phys_memory(struct target
*target
,
2218 target_addr_t address
, uint32_t size
,
2219 uint32_t count
, const uint8_t *buffer
)
2221 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
2223 LOG_DEBUG("Writing memory to real address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
, address
,
2226 if (count
&& buffer
) {
2227 /* write memory through APB-AP */
2228 retval
= aarch64_mmu_modify(target
, 0);
2229 if (retval
!= ERROR_OK
)
2231 return aarch64_write_apb_ap_memory(target
, address
, size
, count
, buffer
);
2237 static int aarch64_write_memory(struct target
*target
, target_addr_t address
,
2238 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
2240 int mmu_enabled
= 0;
2243 /* aarch64 handles unaligned memory access */
2244 LOG_DEBUG("Writing memory at address 0x%" TARGET_PRIxADDR
"; size %" PRId32
2245 "; count %" PRId32
, address
, size
, count
);
2247 /* determine if MMU was enabled on target stop */
2248 retval
= aarch64_mmu(target
, &mmu_enabled
);
2249 if (retval
!= ERROR_OK
)
2253 retval
= aarch64_check_address(target
, address
);
2254 if (retval
!= ERROR_OK
)
2256 /* enable MMU as we could have disabled it for phys access */
2257 retval
= aarch64_mmu_modify(target
, 1);
2258 if (retval
!= ERROR_OK
)
2261 return aarch64_write_apb_ap_memory(target
, address
, size
, count
, buffer
);
2264 static int aarch64_handle_target_request(void *priv
)
2266 struct target
*target
= priv
;
2267 struct armv8_common
*armv8
= target_to_armv8(target
);
2270 if (!target_was_examined(target
))
2272 if (!target
->dbg_msg_enabled
)
2275 if (target
->state
== TARGET_RUNNING
) {
2278 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2279 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2281 /* check if we have data */
2282 while ((dscr
& DSCR_DTR_TX_FULL
) && (retval
== ERROR_OK
)) {
2283 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2284 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &request
);
2285 if (retval
== ERROR_OK
) {
2286 target_request(target
, request
);
2287 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2288 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2296 static int aarch64_examine_first(struct target
*target
)
2298 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
2299 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2300 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2302 int retval
= ERROR_OK
;
2303 uint64_t debug
, ttypr
;
2305 uint32_t tmp0
, tmp1
;
2306 debug
= ttypr
= cpuid
= 0;
2308 /* We do one extra read to ensure DAP is configured,
2309 * we call ahbap_debugport_init(swjdp) instead
2311 retval
= dap_dp_init(swjdp
);
2312 if (retval
!= ERROR_OK
)
2315 /* Search for the APB-AB - it is needed for access to debug registers */
2316 retval
= dap_find_ap(swjdp
, AP_TYPE_APB_AP
, &armv8
->debug_ap
);
2317 if (retval
!= ERROR_OK
) {
2318 LOG_ERROR("Could not find APB-AP for debug access");
2322 retval
= mem_ap_init(armv8
->debug_ap
);
2323 if (retval
!= ERROR_OK
) {
2324 LOG_ERROR("Could not initialize the APB-AP");
2328 armv8
->debug_ap
->memaccess_tck
= 80;
2330 if (!target
->dbgbase_set
) {
2332 /* Get ROM Table base */
2334 int32_t coreidx
= target
->coreid
;
2335 retval
= dap_get_debugbase(armv8
->debug_ap
, &dbgbase
, &apid
);
2336 if (retval
!= ERROR_OK
)
2338 /* Lookup 0x15 -- Processor DAP */
2339 retval
= dap_lookup_cs_component(armv8
->debug_ap
, dbgbase
, 0x15,
2340 &armv8
->debug_base
, &coreidx
);
2341 if (retval
!= ERROR_OK
)
2343 LOG_DEBUG("Detected core %" PRId32
" dbgbase: %08" PRIx32
2344 " apid: %08" PRIx32
, coreidx
, armv8
->debug_base
, apid
);
2346 armv8
->debug_base
= target
->dbgbase
;
2348 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2349 armv8
->debug_base
+ CPUV8_DBG_LOCKACCESS
, 0xC5ACCE55);
2350 if (retval
!= ERROR_OK
) {
2351 LOG_DEBUG("LOCK debug access fail");
2355 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2356 armv8
->debug_base
+ CPUV8_DBG_OSLAR
, 0);
2357 if (retval
!= ERROR_OK
) {
2358 LOG_DEBUG("Examine %s failed", "oslock");
2362 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2363 armv8
->debug_base
+ CPUV8_DBG_MAINID0
, &cpuid
);
2364 if (retval
!= ERROR_OK
) {
2365 LOG_DEBUG("Examine %s failed", "CPUID");
2369 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2370 armv8
->debug_base
+ CPUV8_DBG_MEMFEATURE0
, &tmp0
);
2371 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2372 armv8
->debug_base
+ CPUV8_DBG_MEMFEATURE0
+ 4, &tmp1
);
2373 if (retval
!= ERROR_OK
) {
2374 LOG_DEBUG("Examine %s failed", "Memory Model Type");
2378 ttypr
= (ttypr
<< 32) | tmp0
;
2380 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2381 armv8
->debug_base
+ CPUV8_DBG_DBGFEATURE0
, &tmp0
);
2382 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2383 armv8
->debug_base
+ CPUV8_DBG_DBGFEATURE0
+ 4, &tmp1
);
2384 if (retval
!= ERROR_OK
) {
2385 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2389 debug
= (debug
<< 32) | tmp0
;
2391 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
2392 LOG_DEBUG("ttypr = 0x%08" PRIx64
, ttypr
);
2393 LOG_DEBUG("debug = 0x%08" PRIx64
, debug
);
2395 if (target
->ctibase
== 0) {
2396 /* assume a v8 rom table layout */
2397 armv8
->cti_base
= target
->ctibase
= armv8
->debug_base
+ 0x10000;
2398 LOG_INFO("Target ctibase is not set, assuming 0x%0" PRIx32
, target
->ctibase
);
2400 armv8
->cti_base
= target
->ctibase
;
2402 armv8
->arm
.core_type
= ARM_MODE_MON
;
2403 retval
= aarch64_dpm_setup(aarch64
, debug
);
2404 if (retval
!= ERROR_OK
)
2407 /* Setup Breakpoint Register Pairs */
2408 aarch64
->brp_num
= (uint32_t)((debug
>> 12) & 0x0F) + 1;
2409 aarch64
->brp_num_context
= (uint32_t)((debug
>> 28) & 0x0F) + 1;
2410 aarch64
->brp_num_available
= aarch64
->brp_num
;
2411 aarch64
->brp_list
= calloc(aarch64
->brp_num
, sizeof(struct aarch64_brp
));
2412 for (i
= 0; i
< aarch64
->brp_num
; i
++) {
2413 aarch64
->brp_list
[i
].used
= 0;
2414 if (i
< (aarch64
->brp_num
-aarch64
->brp_num_context
))
2415 aarch64
->brp_list
[i
].type
= BRP_NORMAL
;
2417 aarch64
->brp_list
[i
].type
= BRP_CONTEXT
;
2418 aarch64
->brp_list
[i
].value
= 0;
2419 aarch64
->brp_list
[i
].control
= 0;
2420 aarch64
->brp_list
[i
].BRPn
= i
;
2423 LOG_DEBUG("Configured %i hw breakpoints", aarch64
->brp_num
);
2425 target_set_examined(target
);
2429 static int aarch64_examine(struct target
*target
)
2431 int retval
= ERROR_OK
;
2433 /* don't re-probe hardware after each reset */
2434 if (!target_was_examined(target
))
2435 retval
= aarch64_examine_first(target
);
2437 /* Configure core debug access */
2438 if (retval
== ERROR_OK
)
2439 retval
= aarch64_init_debug_access(target
);
2445 * Cortex-A8 target creation and initialization
2448 static int aarch64_init_target(struct command_context
*cmd_ctx
,
2449 struct target
*target
)
2451 /* examine_first() does a bunch of this */
2455 static int aarch64_init_arch_info(struct target
*target
,
2456 struct aarch64_common
*aarch64
, struct jtag_tap
*tap
)
2458 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2459 struct adiv5_dap
*dap
= armv8
->arm
.dap
;
2461 armv8
->arm
.dap
= dap
;
2463 /* Setup struct aarch64_common */
2464 aarch64
->common_magic
= AARCH64_COMMON_MAGIC
;
2465 /* tap has no dap initialized */
2467 tap
->dap
= dap_init();
2469 /* Leave (only) generic DAP stuff for debugport_init() */
2470 tap
->dap
->tap
= tap
;
2473 armv8
->arm
.dap
= tap
->dap
;
2475 aarch64
->fast_reg_read
= 0;
2477 /* register arch-specific functions */
2478 armv8
->examine_debug_reason
= NULL
;
2480 armv8
->post_debug_entry
= aarch64_post_debug_entry
;
2482 armv8
->pre_restore_context
= NULL
;
2484 armv8
->armv8_mmu
.read_physical_memory
= aarch64_read_phys_memory
;
2486 /* REVISIT v7a setup should be in a v7a-specific routine */
2487 armv8_init_arch_info(target
, armv8
);
2488 target_register_timer_callback(aarch64_handle_target_request
, 1, 1, target
);
2493 static int aarch64_target_create(struct target
*target
, Jim_Interp
*interp
)
2495 struct aarch64_common
*aarch64
= calloc(1, sizeof(struct aarch64_common
));
2497 return aarch64_init_arch_info(target
, aarch64
, target
->tap
);
2500 static int aarch64_mmu(struct target
*target
, int *enabled
)
2502 if (target
->state
!= TARGET_HALTED
) {
2503 LOG_ERROR("%s: target not halted", __func__
);
2504 return ERROR_TARGET_INVALID
;
2507 *enabled
= target_to_aarch64(target
)->armv8_common
.armv8_mmu
.mmu_enabled
;
2511 static int aarch64_virt2phys(struct target
*target
, target_addr_t virt
,
2512 target_addr_t
*phys
)
2514 return armv8_mmu_translate_va(target
, virt
, phys
);
2517 COMMAND_HANDLER(aarch64_handle_cache_info_command
)
2519 struct target
*target
= get_current_target(CMD_CTX
);
2520 struct armv8_common
*armv8
= target_to_armv8(target
);
2522 return armv8_handle_cache_info_command(CMD_CTX
,
2523 &armv8
->armv8_mmu
.armv8_cache
);
2527 COMMAND_HANDLER(aarch64_handle_dbginit_command
)
2529 struct target
*target
= get_current_target(CMD_CTX
);
2530 if (!target_was_examined(target
)) {
2531 LOG_ERROR("target not examined yet");
2535 return aarch64_init_debug_access(target
);
2537 COMMAND_HANDLER(aarch64_handle_smp_off_command
)
2539 struct target
*target
= get_current_target(CMD_CTX
);
2540 /* check target is an smp target */
2541 struct target_list
*head
;
2542 struct target
*curr
;
2543 head
= target
->head
;
2545 if (head
!= (struct target_list
*)NULL
) {
2546 while (head
!= (struct target_list
*)NULL
) {
2547 curr
= head
->target
;
2551 /* fixes the target display to the debugger */
2552 target
->gdb_service
->target
= target
;
2557 COMMAND_HANDLER(aarch64_handle_smp_on_command
)
2559 struct target
*target
= get_current_target(CMD_CTX
);
2560 struct target_list
*head
;
2561 struct target
*curr
;
2562 head
= target
->head
;
2563 if (head
!= (struct target_list
*)NULL
) {
2565 while (head
!= (struct target_list
*)NULL
) {
2566 curr
= head
->target
;
2574 COMMAND_HANDLER(aarch64_handle_smp_gdb_command
)
2576 struct target
*target
= get_current_target(CMD_CTX
);
2577 int retval
= ERROR_OK
;
2578 struct target_list
*head
;
2579 head
= target
->head
;
2580 if (head
!= (struct target_list
*)NULL
) {
2581 if (CMD_ARGC
== 1) {
2583 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], coreid
);
2584 if (ERROR_OK
!= retval
)
2586 target
->gdb_service
->core
[1] = coreid
;
2589 command_print(CMD_CTX
, "gdb coreid %" PRId32
" -> %" PRId32
, target
->gdb_service
->core
[0]
2590 , target
->gdb_service
->core
[1]);
2595 static const struct command_registration aarch64_exec_command_handlers
[] = {
2597 .name
= "cache_info",
2598 .handler
= aarch64_handle_cache_info_command
,
2599 .mode
= COMMAND_EXEC
,
2600 .help
= "display information about target caches",
2605 .handler
= aarch64_handle_dbginit_command
,
2606 .mode
= COMMAND_EXEC
,
2607 .help
= "Initialize core debug",
2610 { .name
= "smp_off",
2611 .handler
= aarch64_handle_smp_off_command
,
2612 .mode
= COMMAND_EXEC
,
2613 .help
= "Stop smp handling",
2618 .handler
= aarch64_handle_smp_on_command
,
2619 .mode
= COMMAND_EXEC
,
2620 .help
= "Restart smp handling",
2625 .handler
= aarch64_handle_smp_gdb_command
,
2626 .mode
= COMMAND_EXEC
,
2627 .help
= "display/fix current core played to gdb",
2632 COMMAND_REGISTRATION_DONE
2634 static const struct command_registration aarch64_command_handlers
[] = {
2636 .chain
= arm_command_handlers
,
2639 .chain
= armv8_command_handlers
,
2643 .mode
= COMMAND_ANY
,
2644 .help
= "Cortex-A command group",
2646 .chain
= aarch64_exec_command_handlers
,
2648 COMMAND_REGISTRATION_DONE
2651 struct target_type aarch64_target
= {
2654 .poll
= aarch64_poll
,
2655 .arch_state
= armv8_arch_state
,
2657 .halt
= aarch64_halt
,
2658 .resume
= aarch64_resume
,
2659 .step
= aarch64_step
,
2661 .assert_reset
= aarch64_assert_reset
,
2662 .deassert_reset
= aarch64_deassert_reset
,
2664 /* REVISIT allow exporting VFP3 registers ... */
2665 .get_gdb_reg_list
= armv8_get_gdb_reg_list
,
2667 .read_memory
= aarch64_read_memory
,
2668 .write_memory
= aarch64_write_memory
,
2670 .checksum_memory
= arm_checksum_memory
,
2671 .blank_check_memory
= arm_blank_check_memory
,
2673 .run_algorithm
= armv4_5_run_algorithm
,
2675 .add_breakpoint
= aarch64_add_breakpoint
,
2676 .add_context_breakpoint
= aarch64_add_context_breakpoint
,
2677 .add_hybrid_breakpoint
= aarch64_add_hybrid_breakpoint
,
2678 .remove_breakpoint
= aarch64_remove_breakpoint
,
2679 .add_watchpoint
= NULL
,
2680 .remove_watchpoint
= NULL
,
2682 .commands
= aarch64_command_handlers
,
2683 .target_create
= aarch64_target_create
,
2684 .init_target
= aarch64_init_target
,
2685 .examine
= aarch64_examine
,
2687 .read_phys_memory
= aarch64_read_phys_memory
,
2688 .write_phys_memory
= aarch64_write_phys_memory
,
2690 .virt2phys
= aarch64_virt2phys
,