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 "arm_opcodes.h"
30 #include <helper/time_support.h>
32 static int aarch64_poll(struct target
*target
);
33 static int aarch64_debug_entry(struct target
*target
);
34 static int aarch64_restore_context(struct target
*target
, bool bpwp
);
35 static int aarch64_set_breakpoint(struct target
*target
,
36 struct breakpoint
*breakpoint
, uint8_t matchmode
);
37 static int aarch64_set_context_breakpoint(struct target
*target
,
38 struct breakpoint
*breakpoint
, uint8_t matchmode
);
39 static int aarch64_set_hybrid_breakpoint(struct target
*target
,
40 struct breakpoint
*breakpoint
);
41 static int aarch64_unset_breakpoint(struct target
*target
,
42 struct breakpoint
*breakpoint
);
43 static int aarch64_mmu(struct target
*target
, int *enabled
);
44 static int aarch64_virt2phys(struct target
*target
,
45 target_addr_t virt
, target_addr_t
*phys
);
46 static int aarch64_read_apb_ab_memory(struct target
*target
,
47 uint64_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
);
48 static int aarch64_instr_write_data_r0(struct arm_dpm
*dpm
,
49 uint32_t opcode
, uint32_t data
);
51 static int aarch64_restore_system_control_reg(struct target
*target
)
53 int retval
= ERROR_OK
;
55 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
56 struct armv8_common
*armv8
= target_to_armv8(target
);
58 if (aarch64
->system_control_reg
!= aarch64
->system_control_reg_curr
) {
59 aarch64
->system_control_reg_curr
= aarch64
->system_control_reg
;
60 retval
= aarch64_instr_write_data_r0(armv8
->arm
.dpm
,
62 aarch64
->system_control_reg
);
68 /* check address before aarch64_apb read write access with mmu on
69 * remove apb predictible data abort */
70 static int aarch64_check_address(struct target
*target
, uint32_t address
)
75 /* modify system_control_reg in order to enable or disable mmu for :
76 * - virt2phys address conversion
77 * - read or write memory in phys or virt address */
78 static int aarch64_mmu_modify(struct target
*target
, int enable
)
80 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
81 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
82 int retval
= ERROR_OK
;
85 /* if mmu enabled at target stop and mmu not enable */
86 if (!(aarch64
->system_control_reg
& 0x1U
)) {
87 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
90 if (!(aarch64
->system_control_reg_curr
& 0x1U
)) {
91 aarch64
->system_control_reg_curr
|= 0x1U
;
92 retval
= aarch64_instr_write_data_r0(armv8
->arm
.dpm
,
94 aarch64
->system_control_reg_curr
);
97 if (aarch64
->system_control_reg_curr
& 0x4U
) {
98 /* data cache is active */
99 aarch64
->system_control_reg_curr
&= ~0x4U
;
100 /* flush data cache armv7 function to be called */
101 if (armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache
)
102 armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache(target
);
104 if ((aarch64
->system_control_reg_curr
& 0x1U
)) {
105 aarch64
->system_control_reg_curr
&= ~0x1U
;
106 retval
= aarch64_instr_write_data_r0(armv8
->arm
.dpm
,
108 aarch64
->system_control_reg_curr
);
115 * Basic debug access, very low level assumes state is saved
117 static int aarch64_init_debug_access(struct target
*target
)
119 struct armv8_common
*armv8
= target_to_armv8(target
);
125 /* Unlocking the debug registers for modification
126 * The debugport might be uninitialised so try twice */
127 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
128 armv8
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
129 if (retval
!= ERROR_OK
) {
131 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
132 armv8
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
133 if (retval
== ERROR_OK
)
134 LOG_USER("Locking debug access failed on first, but succeeded on second try.");
136 if (retval
!= ERROR_OK
)
138 /* Clear Sticky Power Down status Bit in PRSR to enable access to
139 the registers in the Core Power Domain */
140 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
141 armv8
->debug_base
+ CPUDBG_PRSR
, &dummy
);
142 if (retval
!= ERROR_OK
)
145 /* Enabling of instruction execution in debug mode is done in debug_entry code */
147 /* Resync breakpoint registers */
149 /* Since this is likely called from init or reset, update target state information*/
150 return aarch64_poll(target
);
153 /* To reduce needless round-trips, pass in a pointer to the current
154 * DSCR value. Initialize it to zero if you just need to know the
155 * value on return from this function; or DSCR_INSTR_COMP if you
156 * happen to know that no instruction is pending.
158 static int aarch64_exec_opcode(struct target
*target
,
159 uint32_t opcode
, uint32_t *dscr_p
)
163 struct armv8_common
*armv8
= target_to_armv8(target
);
164 dscr
= dscr_p
? *dscr_p
: 0;
166 LOG_DEBUG("exec opcode 0x%08" PRIx32
, opcode
);
168 /* Wait for InstrCompl bit to be set */
169 long long then
= timeval_ms();
170 while ((dscr
& DSCR_INSTR_COMP
) == 0) {
171 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
172 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
173 if (retval
!= ERROR_OK
) {
174 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32
, opcode
);
177 if (timeval_ms() > then
+ 1000) {
178 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
183 retval
= mem_ap_write_u32(armv8
->debug_ap
,
184 armv8
->debug_base
+ CPUDBG_ITR
, opcode
);
185 if (retval
!= ERROR_OK
)
190 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
191 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
192 if (retval
!= ERROR_OK
) {
193 LOG_ERROR("Could not read DSCR register");
196 if (timeval_ms() > then
+ 1000) {
197 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
200 } while ((dscr
& DSCR_INSTR_COMP
) == 0); /* Wait for InstrCompl bit to be set */
208 /* Write to memory mapped registers directly with no cache or mmu handling */
209 static int aarch64_dap_write_memap_register_u32(struct target
*target
,
214 struct armv8_common
*armv8
= target_to_armv8(target
);
216 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
, address
, value
);
222 * AARCH64 implementation of Debug Programmer's Model
224 * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
225 * so there's no need to poll for it before executing an instruction.
227 * NOTE that in several of these cases the "stall" mode might be useful.
228 * It'd let us queue a few operations together... prepare/finish might
229 * be the places to enable/disable that mode.
232 static inline struct aarch64_common
*dpm_to_a8(struct arm_dpm
*dpm
)
234 return container_of(dpm
, struct aarch64_common
, armv8_common
.dpm
);
237 static int aarch64_write_dcc(struct armv8_common
*armv8
, uint32_t data
)
239 LOG_DEBUG("write DCC 0x%08" PRIx32
, data
);
240 return mem_ap_write_u32(armv8
->debug_ap
,
241 armv8
->debug_base
+ CPUDBG_DTRRX
, data
);
244 static int aarch64_write_dcc_64(struct armv8_common
*armv8
, uint64_t data
)
247 LOG_DEBUG("write DCC Low word0x%08" PRIx32
, (unsigned)data
);
248 LOG_DEBUG("write DCC High word 0x%08" PRIx32
, (unsigned)(data
>> 32));
249 ret
= mem_ap_write_u32(armv8
->debug_ap
,
250 armv8
->debug_base
+ CPUDBG_DTRRX
, data
);
251 ret
+= mem_ap_write_u32(armv8
->debug_ap
,
252 armv8
->debug_base
+ CPUDBG_DTRTX
, data
>> 32);
256 static int aarch64_read_dcc(struct armv8_common
*armv8
, uint32_t *data
,
259 uint32_t dscr
= DSCR_INSTR_COMP
;
265 /* Wait for DTRRXfull */
266 long long then
= timeval_ms();
267 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
268 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
269 armv8
->debug_base
+ CPUDBG_DSCR
,
271 if (retval
!= ERROR_OK
)
273 if (timeval_ms() > then
+ 1000) {
274 LOG_ERROR("Timeout waiting for read dcc");
279 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
280 armv8
->debug_base
+ CPUDBG_DTRTX
,
282 if (retval
!= ERROR_OK
)
284 LOG_DEBUG("read DCC 0x%08" PRIx32
, *data
);
292 static int aarch64_read_dcc_64(struct armv8_common
*armv8
, uint64_t *data
,
295 uint32_t dscr
= DSCR_INSTR_COMP
;
302 /* Wait for DTRRXfull */
303 long long then
= timeval_ms();
304 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
305 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
306 armv8
->debug_base
+ CPUDBG_DSCR
,
308 if (retval
!= ERROR_OK
)
310 if (timeval_ms() > then
+ 1000) {
311 LOG_ERROR("Timeout waiting for read dcc");
316 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
317 armv8
->debug_base
+ CPUDBG_DTRTX
,
319 if (retval
!= ERROR_OK
)
322 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
323 armv8
->debug_base
+ CPUDBG_DTRRX
,
325 if (retval
!= ERROR_OK
)
328 *data
= *(uint32_t *)data
| (uint64_t)higher
<< 32;
329 LOG_DEBUG("read DCC 0x%16.16" PRIx64
, *data
);
337 static int aarch64_dpm_prepare(struct arm_dpm
*dpm
)
339 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
343 /* set up invariant: INSTR_COMP is set after ever DPM operation */
344 long long then
= timeval_ms();
346 retval
= mem_ap_read_atomic_u32(a8
->armv8_common
.debug_ap
,
347 a8
->armv8_common
.debug_base
+ CPUDBG_DSCR
,
349 if (retval
!= ERROR_OK
)
351 if ((dscr
& DSCR_INSTR_COMP
) != 0)
353 if (timeval_ms() > then
+ 1000) {
354 LOG_ERROR("Timeout waiting for dpm prepare");
359 /* this "should never happen" ... */
360 if (dscr
& DSCR_DTR_RX_FULL
) {
361 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
363 retval
= aarch64_exec_opcode(
364 a8
->armv8_common
.arm
.target
,
367 if (retval
!= ERROR_OK
)
374 static int aarch64_dpm_finish(struct arm_dpm
*dpm
)
376 /* REVISIT what could be done here? */
380 static int aarch64_instr_execute(struct arm_dpm
*dpm
,
383 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
384 uint32_t dscr
= DSCR_ITE
;
386 return aarch64_exec_opcode(
387 a8
->armv8_common
.arm
.target
,
392 static int aarch64_instr_write_data_dcc(struct arm_dpm
*dpm
,
393 uint32_t opcode
, uint32_t data
)
395 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
397 uint32_t dscr
= DSCR_INSTR_COMP
;
399 retval
= aarch64_write_dcc(&a8
->armv8_common
, data
);
400 if (retval
!= ERROR_OK
)
403 return aarch64_exec_opcode(
404 a8
->armv8_common
.arm
.target
,
409 static int aarch64_instr_write_data_dcc_64(struct arm_dpm
*dpm
,
410 uint32_t opcode
, uint64_t data
)
412 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
414 uint32_t dscr
= DSCR_INSTR_COMP
;
416 retval
= aarch64_write_dcc_64(&a8
->armv8_common
, data
);
417 if (retval
!= ERROR_OK
)
420 return aarch64_exec_opcode(
421 a8
->armv8_common
.arm
.target
,
426 static int aarch64_instr_write_data_r0(struct arm_dpm
*dpm
,
427 uint32_t opcode
, uint32_t data
)
429 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
430 uint32_t dscr
= DSCR_INSTR_COMP
;
433 retval
= aarch64_write_dcc(&a8
->armv8_common
, data
);
434 if (retval
!= ERROR_OK
)
437 retval
= aarch64_exec_opcode(
438 a8
->armv8_common
.arm
.target
,
441 if (retval
!= ERROR_OK
)
444 /* then the opcode, taking data from R0 */
445 retval
= aarch64_exec_opcode(
446 a8
->armv8_common
.arm
.target
,
453 static int aarch64_instr_write_data_r0_64(struct arm_dpm
*dpm
,
454 uint32_t opcode
, uint64_t data
)
456 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
457 uint32_t dscr
= DSCR_INSTR_COMP
;
460 retval
= aarch64_write_dcc_64(&a8
->armv8_common
, data
);
461 if (retval
!= ERROR_OK
)
464 retval
= aarch64_exec_opcode(
465 a8
->armv8_common
.arm
.target
,
468 if (retval
!= ERROR_OK
)
471 /* then the opcode, taking data from R0 */
472 retval
= aarch64_exec_opcode(
473 a8
->armv8_common
.arm
.target
,
480 static int aarch64_instr_cpsr_sync(struct arm_dpm
*dpm
)
482 struct target
*target
= dpm
->arm
->target
;
483 uint32_t dscr
= DSCR_INSTR_COMP
;
485 /* "Prefetch flush" after modifying execution status in CPSR */
486 return aarch64_exec_opcode(target
,
487 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
491 static int aarch64_instr_read_data_dcc(struct arm_dpm
*dpm
,
492 uint32_t opcode
, uint32_t *data
)
494 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
496 uint32_t dscr
= DSCR_INSTR_COMP
;
498 /* the opcode, writing data to DCC */
499 retval
= aarch64_exec_opcode(
500 a8
->armv8_common
.arm
.target
,
503 if (retval
!= ERROR_OK
)
506 return aarch64_read_dcc(&a8
->armv8_common
, data
, &dscr
);
509 static int aarch64_instr_read_data_dcc_64(struct arm_dpm
*dpm
,
510 uint32_t opcode
, uint64_t *data
)
512 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
514 uint32_t dscr
= DSCR_INSTR_COMP
;
516 /* the opcode, writing data to DCC */
517 retval
= aarch64_exec_opcode(
518 a8
->armv8_common
.arm
.target
,
521 if (retval
!= ERROR_OK
)
524 return aarch64_read_dcc_64(&a8
->armv8_common
, data
, &dscr
);
527 static int aarch64_instr_read_data_r0(struct arm_dpm
*dpm
,
528 uint32_t opcode
, uint32_t *data
)
530 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
531 uint32_t dscr
= DSCR_INSTR_COMP
;
534 /* the opcode, writing data to R0 */
535 retval
= aarch64_exec_opcode(
536 a8
->armv8_common
.arm
.target
,
539 if (retval
!= ERROR_OK
)
542 /* write R0 to DCC */
543 retval
= aarch64_exec_opcode(
544 a8
->armv8_common
.arm
.target
,
545 0xd5130400, /* msr dbgdtr_el0, x0 */
547 if (retval
!= ERROR_OK
)
550 return aarch64_read_dcc(&a8
->armv8_common
, data
, &dscr
);
553 static int aarch64_instr_read_data_r0_64(struct arm_dpm
*dpm
,
554 uint32_t opcode
, uint64_t *data
)
556 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
557 uint32_t dscr
= DSCR_INSTR_COMP
;
560 /* the opcode, writing data to R0 */
561 retval
= aarch64_exec_opcode(
562 a8
->armv8_common
.arm
.target
,
565 if (retval
!= ERROR_OK
)
568 /* write R0 to DCC */
569 retval
= aarch64_exec_opcode(
570 a8
->armv8_common
.arm
.target
,
571 0xd5130400, /* msr dbgdtr_el0, x0 */
573 if (retval
!= ERROR_OK
)
576 return aarch64_read_dcc_64(&a8
->armv8_common
, data
, &dscr
);
579 static int aarch64_bpwp_enable(struct arm_dpm
*dpm
, unsigned index_t
,
580 uint32_t addr
, uint32_t control
)
582 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
583 uint32_t vr
= a8
->armv8_common
.debug_base
;
584 uint32_t cr
= a8
->armv8_common
.debug_base
;
588 case 0 ... 15: /* breakpoints */
589 vr
+= CPUDBG_BVR_BASE
;
590 cr
+= CPUDBG_BCR_BASE
;
592 case 16 ... 31: /* watchpoints */
593 vr
+= CPUDBG_WVR_BASE
;
594 cr
+= CPUDBG_WCR_BASE
;
603 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
604 (unsigned) vr
, (unsigned) cr
);
606 retval
= aarch64_dap_write_memap_register_u32(dpm
->arm
->target
,
608 if (retval
!= ERROR_OK
)
610 retval
= aarch64_dap_write_memap_register_u32(dpm
->arm
->target
,
615 static int aarch64_bpwp_disable(struct arm_dpm
*dpm
, unsigned index_t
)
620 struct aarch64_common
*a8
= dpm_to_a8(dpm
);
625 cr
= a8
->armv8_common
.debug_base
+ CPUDBG_BCR_BASE
;
628 cr
= a8
->armv8_common
.debug_base
+ CPUDBG_WCR_BASE
;
636 LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr
);
638 /* clear control register */
639 return aarch64_dap_write_memap_register_u32(dpm
->arm
->target
, cr
, 0);
643 static int aarch64_dpm_setup(struct aarch64_common
*a8
, uint32_t debug
)
645 struct arm_dpm
*dpm
= &a8
->armv8_common
.dpm
;
648 dpm
->arm
= &a8
->armv8_common
.arm
;
651 dpm
->prepare
= aarch64_dpm_prepare
;
652 dpm
->finish
= aarch64_dpm_finish
;
654 dpm
->instr_execute
= aarch64_instr_execute
;
655 dpm
->instr_write_data_dcc
= aarch64_instr_write_data_dcc
;
656 dpm
->instr_write_data_dcc_64
= aarch64_instr_write_data_dcc_64
;
657 dpm
->instr_write_data_r0
= aarch64_instr_write_data_r0
;
658 dpm
->instr_write_data_r0_64
= aarch64_instr_write_data_r0_64
;
659 dpm
->instr_cpsr_sync
= aarch64_instr_cpsr_sync
;
661 dpm
->instr_read_data_dcc
= aarch64_instr_read_data_dcc
;
662 dpm
->instr_read_data_dcc_64
= aarch64_instr_read_data_dcc_64
;
663 dpm
->instr_read_data_r0
= aarch64_instr_read_data_r0
;
664 dpm
->instr_read_data_r0_64
= aarch64_instr_read_data_r0_64
;
666 dpm
->arm_reg_current
= armv8_reg_current
;
668 dpm
->bpwp_enable
= aarch64_bpwp_enable
;
669 dpm
->bpwp_disable
= aarch64_bpwp_disable
;
671 retval
= armv8_dpm_setup(dpm
);
672 if (retval
== ERROR_OK
)
673 retval
= armv8_dpm_initialize(dpm
);
677 static struct target
*get_aarch64(struct target
*target
, int32_t coreid
)
679 struct target_list
*head
;
683 while (head
!= (struct target_list
*)NULL
) {
685 if ((curr
->coreid
== coreid
) && (curr
->state
== TARGET_HALTED
))
691 static int aarch64_halt(struct target
*target
);
693 static int aarch64_halt_smp(struct target
*target
)
696 struct target_list
*head
;
699 while (head
!= (struct target_list
*)NULL
) {
701 if ((curr
!= target
) && (curr
->state
!= TARGET_HALTED
))
702 retval
+= aarch64_halt(curr
);
708 static int update_halt_gdb(struct target
*target
)
711 if (target
->gdb_service
&& target
->gdb_service
->core
[0] == -1) {
712 target
->gdb_service
->target
= target
;
713 target
->gdb_service
->core
[0] = target
->coreid
;
714 retval
+= aarch64_halt_smp(target
);
720 * Cortex-A8 Run control
723 static int aarch64_poll(struct target
*target
)
725 int retval
= ERROR_OK
;
727 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
728 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
729 enum target_state prev_target_state
= target
->state
;
730 /* toggle to another core is done by gdb as follow */
731 /* maint packet J core_id */
733 /* the next polling trigger an halt event sent to gdb */
734 if ((target
->state
== TARGET_HALTED
) && (target
->smp
) &&
735 (target
->gdb_service
) &&
736 (target
->gdb_service
->target
== NULL
)) {
737 target
->gdb_service
->target
=
738 get_aarch64(target
, target
->gdb_service
->core
[1]);
739 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
742 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
743 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
744 if (retval
!= ERROR_OK
)
746 aarch64
->cpudbg_dscr
= dscr
;
748 if (DSCR_RUN_MODE(dscr
) == (DSCR_CORE_HALTED
| DSCR_CORE_RESTARTED
)) {
749 if (prev_target_state
!= TARGET_HALTED
) {
750 /* We have a halting debug event */
751 LOG_DEBUG("Target halted");
752 target
->state
= TARGET_HALTED
;
753 if ((prev_target_state
== TARGET_RUNNING
)
754 || (prev_target_state
== TARGET_UNKNOWN
)
755 || (prev_target_state
== TARGET_RESET
)) {
756 retval
= aarch64_debug_entry(target
);
757 if (retval
!= ERROR_OK
)
760 retval
= update_halt_gdb(target
);
761 if (retval
!= ERROR_OK
)
764 target_call_event_callbacks(target
,
765 TARGET_EVENT_HALTED
);
767 if (prev_target_state
== TARGET_DEBUG_RUNNING
) {
770 retval
= aarch64_debug_entry(target
);
771 if (retval
!= ERROR_OK
)
774 retval
= update_halt_gdb(target
);
775 if (retval
!= ERROR_OK
)
779 target_call_event_callbacks(target
,
780 TARGET_EVENT_DEBUG_HALTED
);
783 } else if (DSCR_RUN_MODE(dscr
) == DSCR_CORE_RESTARTED
)
784 target
->state
= TARGET_RUNNING
;
786 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32
, dscr
);
787 target
->state
= TARGET_UNKNOWN
;
793 static int aarch64_halt(struct target
*target
)
795 int retval
= ERROR_OK
;
797 struct armv8_common
*armv8
= target_to_armv8(target
);
799 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
800 armv8
->debug_base
+ 0x10000 + 0, &dscr
);
801 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
802 armv8
->debug_base
+ 0x10000 + 0, 1);
803 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
804 armv8
->debug_base
+ 0x10000 + 0, &dscr
);
806 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
807 armv8
->debug_base
+ 0x10000 + 0x140, &dscr
);
808 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
809 armv8
->debug_base
+ 0x10000 + 0x140, 6);
810 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
811 armv8
->debug_base
+ 0x10000 + 0x140, &dscr
);
813 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
814 armv8
->debug_base
+ 0x10000 + 0xa0, &dscr
);
815 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
816 armv8
->debug_base
+ 0x10000 + 0xa0, 5);
817 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
818 armv8
->debug_base
+ 0x10000 + 0xa0, &dscr
);
820 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
821 armv8
->debug_base
+ 0x10000 + 0xa4, &dscr
);
822 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
823 armv8
->debug_base
+ 0x10000 + 0xa4, 2);
824 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
825 armv8
->debug_base
+ 0x10000 + 0xa4, &dscr
);
827 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
828 armv8
->debug_base
+ 0x10000 + 0x20, &dscr
);
829 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
830 armv8
->debug_base
+ 0x10000 + 0x20, 4);
831 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
832 armv8
->debug_base
+ 0x10000 + 0x20, &dscr
);
835 * enter halting debug mode
837 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
838 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
839 if (retval
!= ERROR_OK
)
843 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
844 armv8
->debug_base
+ 0x10000 + 0x134, &dscr
);
846 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
847 armv8
->debug_base
+ 0x10000 + 0x1c, &dscr
);
848 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
849 armv8
->debug_base
+ 0x10000 + 0x1c, 1);
850 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
851 armv8
->debug_base
+ 0x10000 + 0x1c, &dscr
);
854 long long then
= timeval_ms();
856 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
857 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
858 if (retval
!= ERROR_OK
)
860 if ((dscr
& DSCR_CORE_HALTED
) != 0)
862 if (timeval_ms() > then
+ 1000) {
863 LOG_ERROR("Timeout waiting for halt");
868 target
->debug_reason
= DBG_REASON_DBGRQ
;
873 static int aarch64_internal_restore(struct target
*target
, int current
,
874 uint64_t *address
, int handle_breakpoints
, int debug_execution
)
876 struct armv8_common
*armv8
= target_to_armv8(target
);
877 struct arm
*arm
= &armv8
->arm
;
881 if (!debug_execution
)
882 target_free_all_working_areas(target
);
884 /* current = 1: continue on current pc, otherwise continue at <address> */
885 resume_pc
= buf_get_u64(arm
->pc
->value
, 0, 64);
887 resume_pc
= *address
;
889 *address
= resume_pc
;
891 /* Make sure that the Armv7 gdb thumb fixups does not
892 * kill the return address
894 switch (arm
->core_state
) {
896 resume_pc
&= 0xFFFFFFFC;
898 case ARM_STATE_AARCH64
:
899 resume_pc
&= 0xFFFFFFFFFFFFFFFC;
901 case ARM_STATE_THUMB
:
902 case ARM_STATE_THUMB_EE
:
903 /* When the return address is loaded into PC
904 * bit 0 must be 1 to stay in Thumb state
908 case ARM_STATE_JAZELLE
:
909 LOG_ERROR("How do I resume into Jazelle state??");
912 LOG_DEBUG("resume pc = 0x%16" PRIx64
, resume_pc
);
913 buf_set_u64(arm
->pc
->value
, 0, 64, resume_pc
);
916 dpmv8_modeswitch(&armv8
->dpm
, ARM_MODE_ANY
);
918 /* called it now before restoring context because it uses cpu
919 * register r0 for restoring system control register */
920 retval
= aarch64_restore_system_control_reg(target
);
921 if (retval
!= ERROR_OK
)
923 retval
= aarch64_restore_context(target
, handle_breakpoints
);
924 if (retval
!= ERROR_OK
)
926 target
->debug_reason
= DBG_REASON_NOTHALTED
;
927 target
->state
= TARGET_RUNNING
;
929 /* registers are now invalid */
930 register_cache_invalidate(arm
->core_cache
);
933 /* the front-end may request us not to handle breakpoints */
934 if (handle_breakpoints
) {
935 /* Single step past breakpoint at current address */
936 breakpoint
= breakpoint_find(target
, resume_pc
);
938 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint
->address
);
939 cortex_m3_unset_breakpoint(target
, breakpoint
);
940 cortex_m3_single_step_core(target
);
941 cortex_m3_set_breakpoint(target
, breakpoint
);
949 static int aarch64_internal_restart(struct target
*target
)
951 struct armv8_common
*armv8
= target_to_armv8(target
);
952 struct arm
*arm
= &armv8
->arm
;
956 * * Restart core and wait for it to be started. Clear ITRen and sticky
957 * * exception flags: see ARMv7 ARM, C5.9.
959 * REVISIT: for single stepping, we probably want to
960 * disable IRQs by default, with optional override...
963 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
964 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
965 if (retval
!= ERROR_OK
)
968 if ((dscr
& DSCR_INSTR_COMP
) == 0)
969 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
971 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
972 armv8
->debug_base
+ CPUDBG_DSCR
, dscr
& ~DSCR_ITR_EN
);
973 if (retval
!= ERROR_OK
)
976 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
977 armv8
->debug_base
+ CPUDBG_DRCR
, DRCR_RESTART
|
978 DRCR_CLEAR_EXCEPTIONS
);
979 if (retval
!= ERROR_OK
)
982 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
983 armv8
->debug_base
+ 0x10000 + 0x10, 1);
984 if (retval
!= ERROR_OK
)
987 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
988 armv8
->debug_base
+ 0x10000 + 0x1c, 2);
989 if (retval
!= ERROR_OK
)
992 long long then
= timeval_ms();
994 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
995 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
996 if (retval
!= ERROR_OK
)
998 if ((dscr
& DSCR_CORE_RESTARTED
) != 0)
1000 if (timeval_ms() > then
+ 1000) {
1001 LOG_ERROR("Timeout waiting for resume");
1006 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1007 target
->state
= TARGET_RUNNING
;
1009 /* registers are now invalid */
1010 register_cache_invalidate(arm
->core_cache
);
1015 static int aarch64_restore_smp(struct target
*target
, int handle_breakpoints
)
1018 struct target_list
*head
;
1019 struct target
*curr
;
1021 head
= target
->head
;
1022 while (head
!= (struct target_list
*)NULL
) {
1023 curr
= head
->target
;
1024 if ((curr
!= target
) && (curr
->state
!= TARGET_RUNNING
)) {
1025 /* resume current address , not in step mode */
1026 retval
+= aarch64_internal_restore(curr
, 1, &address
,
1027 handle_breakpoints
, 0);
1028 retval
+= aarch64_internal_restart(curr
);
1036 static int aarch64_resume(struct target
*target
, int current
,
1037 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
1040 uint64_t addr
= address
;
1042 /* dummy resume for smp toggle in order to reduce gdb impact */
1043 if ((target
->smp
) && (target
->gdb_service
->core
[1] != -1)) {
1044 /* simulate a start and halt of target */
1045 target
->gdb_service
->target
= NULL
;
1046 target
->gdb_service
->core
[0] = target
->gdb_service
->core
[1];
1047 /* fake resume at next poll we play the target core[1], see poll*/
1048 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1051 aarch64_internal_restore(target
, current
, &addr
, handle_breakpoints
,
1054 target
->gdb_service
->core
[0] = -1;
1055 retval
= aarch64_restore_smp(target
, handle_breakpoints
);
1056 if (retval
!= ERROR_OK
)
1059 aarch64_internal_restart(target
);
1061 if (!debug_execution
) {
1062 target
->state
= TARGET_RUNNING
;
1063 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1064 LOG_DEBUG("target resumed at 0x%" PRIu64
, addr
);
1066 target
->state
= TARGET_DEBUG_RUNNING
;
1067 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1068 LOG_DEBUG("target debug resumed at 0x%" PRIu64
, addr
);
1074 static int aarch64_debug_entry(struct target
*target
)
1077 int retval
= ERROR_OK
;
1078 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1079 struct armv8_common
*armv8
= target_to_armv8(target
);
1082 LOG_DEBUG("dscr = 0x%08" PRIx32
, aarch64
->cpudbg_dscr
);
1084 /* REVISIT surely we should not re-read DSCR !! */
1085 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1086 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1087 if (retval
!= ERROR_OK
)
1090 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
1091 * imprecise data aborts get discarded by issuing a Data
1092 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
1095 /* Enable the ITR execution once we are in debug mode */
1096 dscr
|= DSCR_ITR_EN
;
1097 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1098 armv8
->debug_base
+ CPUDBG_DSCR
, dscr
);
1099 if (retval
!= ERROR_OK
)
1102 /* Examine debug reason */
1103 arm_dpm_report_dscr(&armv8
->dpm
, aarch64
->cpudbg_dscr
);
1104 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1105 armv8
->debug_base
+ CPUDBG_DESR
, &tmp
);
1106 if ((tmp
& 0x7) == 0x4)
1107 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1109 /* save address of instruction that triggered the watchpoint? */
1110 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
1113 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1114 armv8
->debug_base
+ CPUDBG_WFAR
,
1116 if (retval
!= ERROR_OK
)
1118 arm_dpm_report_wfar(&armv8
->dpm
, wfar
);
1121 retval
= armv8_dpm_read_current_registers(&armv8
->dpm
);
1123 if (armv8
->post_debug_entry
) {
1124 retval
= armv8
->post_debug_entry(target
);
1125 if (retval
!= ERROR_OK
)
1132 static int aarch64_post_debug_entry(struct target
*target
)
1134 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1135 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1136 struct armv8_mmu_common
*armv8_mmu
= &armv8
->armv8_mmu
;
1137 uint32_t sctlr_el1
= 0;
1140 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1141 armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1142 retval
= aarch64_instr_read_data_r0(armv8
->arm
.dpm
,
1143 0xd5381000, &sctlr_el1
);
1144 if (retval
!= ERROR_OK
)
1147 LOG_DEBUG("sctlr_el1 = %#8.8x", sctlr_el1
);
1148 aarch64
->system_control_reg
= sctlr_el1
;
1149 aarch64
->system_control_reg_curr
= sctlr_el1
;
1150 aarch64
->curr_mode
= armv8
->arm
.core_mode
;
1152 armv8_mmu
->mmu_enabled
= sctlr_el1
& 0x1U
? 1 : 0;
1153 armv8_mmu
->armv8_cache
.d_u_cache_enabled
= sctlr_el1
& 0x4U
? 1 : 0;
1154 armv8_mmu
->armv8_cache
.i_cache_enabled
= sctlr_el1
& 0x1000U
? 1 : 0;
1157 if (armv8
->armv8_mmu
.armv8_cache
.ctype
== -1)
1158 armv8_identify_cache(target
);
1164 static int aarch64_step(struct target
*target
, int current
, target_addr_t address
,
1165 int handle_breakpoints
)
1167 struct armv8_common
*armv8
= target_to_armv8(target
);
1171 if (target
->state
!= TARGET_HALTED
) {
1172 LOG_WARNING("target not halted");
1173 return ERROR_TARGET_NOT_HALTED
;
1176 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1177 armv8
->debug_base
+ CPUDBG_DECR
, &tmp
);
1178 if (retval
!= ERROR_OK
)
1181 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1182 armv8
->debug_base
+ CPUDBG_DECR
, (tmp
|0x4));
1183 if (retval
!= ERROR_OK
)
1186 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1187 retval
= aarch64_resume(target
, 1, address
, 0, 0);
1188 if (retval
!= ERROR_OK
)
1191 long long then
= timeval_ms();
1192 while (target
->state
!= TARGET_HALTED
) {
1193 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1194 armv8
->debug_base
+ CPUDBG_DESR
, &tmp
);
1195 LOG_DEBUG("DESR = %#x", tmp
);
1196 retval
= aarch64_poll(target
);
1197 if (retval
!= ERROR_OK
)
1199 if (timeval_ms() > then
+ 1000) {
1200 LOG_ERROR("timeout waiting for target halt");
1205 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1206 armv8
->debug_base
+ CPUDBG_DECR
, (tmp
&(~0x4)));
1207 if (retval
!= ERROR_OK
)
1210 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1211 if (target
->state
== TARGET_HALTED
)
1212 LOG_DEBUG("target stepped");
1217 static int aarch64_restore_context(struct target
*target
, bool bpwp
)
1219 struct armv8_common
*armv8
= target_to_armv8(target
);
1223 if (armv8
->pre_restore_context
)
1224 armv8
->pre_restore_context(target
);
1226 return armv8_dpm_write_dirty_registers(&armv8
->dpm
, bpwp
);
1231 * Cortex-A8 Breakpoint and watchpoint functions
1234 /* Setup hardware Breakpoint Register Pair */
1235 static int aarch64_set_breakpoint(struct target
*target
,
1236 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1241 uint8_t byte_addr_select
= 0x0F;
1242 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1243 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1244 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1247 if (breakpoint
->set
) {
1248 LOG_WARNING("breakpoint already set");
1252 if (breakpoint
->type
== BKPT_HARD
) {
1254 while (brp_list
[brp_i
].used
&& (brp_i
< aarch64
->brp_num
))
1256 if (brp_i
>= aarch64
->brp_num
) {
1257 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1258 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1260 breakpoint
->set
= brp_i
+ 1;
1261 if (breakpoint
->length
== 2)
1262 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1263 control
= ((matchmode
& 0x7) << 20)
1265 | (byte_addr_select
<< 5)
1267 brp_list
[brp_i
].used
= 1;
1268 brp_list
[brp_i
].value
= breakpoint
->address
& 0xFFFFFFFFFFFFFFFC;
1269 brp_list
[brp_i
].control
= control
;
1270 bpt_value
= brp_list
[brp_i
].value
;
1272 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1273 + CPUDBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1274 (uint32_t)(bpt_value
& 0xFFFFFFFF));
1275 if (retval
!= ERROR_OK
)
1277 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1278 + CPUDBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1279 (uint32_t)(bpt_value
>> 32));
1280 if (retval
!= ERROR_OK
)
1283 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1284 + CPUDBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1285 brp_list
[brp_i
].control
);
1286 if (retval
!= ERROR_OK
)
1288 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1289 brp_list
[brp_i
].control
,
1290 brp_list
[brp_i
].value
);
1292 } else if (breakpoint
->type
== BKPT_SOFT
) {
1294 buf_set_u32(code
, 0, 32, 0xD4400000);
1296 retval
= target_read_memory(target
,
1297 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1298 breakpoint
->length
, 1,
1299 breakpoint
->orig_instr
);
1300 if (retval
!= ERROR_OK
)
1302 retval
= target_write_memory(target
,
1303 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1304 breakpoint
->length
, 1, code
);
1305 if (retval
!= ERROR_OK
)
1307 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1310 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1311 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1312 /* Ensure that halting debug mode is enable */
1313 dscr
= dscr
| DSCR_HALT_DBG_MODE
;
1314 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1315 armv8
->debug_base
+ CPUDBG_DSCR
, dscr
);
1316 if (retval
!= ERROR_OK
) {
1317 LOG_DEBUG("Failed to set DSCR.HDE");
1324 static int aarch64_set_context_breakpoint(struct target
*target
,
1325 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1327 int retval
= ERROR_FAIL
;
1330 uint8_t byte_addr_select
= 0x0F;
1331 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1332 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1333 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1335 if (breakpoint
->set
) {
1336 LOG_WARNING("breakpoint already set");
1339 /*check available context BRPs*/
1340 while ((brp_list
[brp_i
].used
||
1341 (brp_list
[brp_i
].type
!= BRP_CONTEXT
)) && (brp_i
< aarch64
->brp_num
))
1344 if (brp_i
>= aarch64
->brp_num
) {
1345 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1349 breakpoint
->set
= brp_i
+ 1;
1350 control
= ((matchmode
& 0x7) << 20)
1351 | (byte_addr_select
<< 5)
1353 brp_list
[brp_i
].used
= 1;
1354 brp_list
[brp_i
].value
= (breakpoint
->asid
);
1355 brp_list
[brp_i
].control
= control
;
1356 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1357 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1358 brp_list
[brp_i
].value
);
1359 if (retval
!= ERROR_OK
)
1361 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1362 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1363 brp_list
[brp_i
].control
);
1364 if (retval
!= ERROR_OK
)
1366 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1367 brp_list
[brp_i
].control
,
1368 brp_list
[brp_i
].value
);
1373 static int aarch64_set_hybrid_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1375 int retval
= ERROR_FAIL
;
1376 int brp_1
= 0; /* holds the contextID pair */
1377 int brp_2
= 0; /* holds the IVA pair */
1378 uint32_t control_CTX
, control_IVA
;
1379 uint8_t CTX_byte_addr_select
= 0x0F;
1380 uint8_t IVA_byte_addr_select
= 0x0F;
1381 uint8_t CTX_machmode
= 0x03;
1382 uint8_t IVA_machmode
= 0x01;
1383 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1384 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1385 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1387 if (breakpoint
->set
) {
1388 LOG_WARNING("breakpoint already set");
1391 /*check available context BRPs*/
1392 while ((brp_list
[brp_1
].used
||
1393 (brp_list
[brp_1
].type
!= BRP_CONTEXT
)) && (brp_1
< aarch64
->brp_num
))
1396 printf("brp(CTX) found num: %d\n", brp_1
);
1397 if (brp_1
>= aarch64
->brp_num
) {
1398 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1402 while ((brp_list
[brp_2
].used
||
1403 (brp_list
[brp_2
].type
!= BRP_NORMAL
)) && (brp_2
< aarch64
->brp_num
))
1406 printf("brp(IVA) found num: %d\n", brp_2
);
1407 if (brp_2
>= aarch64
->brp_num
) {
1408 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1412 breakpoint
->set
= brp_1
+ 1;
1413 breakpoint
->linked_BRP
= brp_2
;
1414 control_CTX
= ((CTX_machmode
& 0x7) << 20)
1417 | (CTX_byte_addr_select
<< 5)
1419 brp_list
[brp_1
].used
= 1;
1420 brp_list
[brp_1
].value
= (breakpoint
->asid
);
1421 brp_list
[brp_1
].control
= control_CTX
;
1422 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1423 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_1
].BRPn
,
1424 brp_list
[brp_1
].value
);
1425 if (retval
!= ERROR_OK
)
1427 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1428 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_1
].BRPn
,
1429 brp_list
[brp_1
].control
);
1430 if (retval
!= ERROR_OK
)
1433 control_IVA
= ((IVA_machmode
& 0x7) << 20)
1435 | (IVA_byte_addr_select
<< 5)
1437 brp_list
[brp_2
].used
= 1;
1438 brp_list
[brp_2
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1439 brp_list
[brp_2
].control
= control_IVA
;
1440 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1441 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_2
].BRPn
,
1442 brp_list
[brp_2
].value
);
1443 if (retval
!= ERROR_OK
)
1445 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1446 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_2
].BRPn
,
1447 brp_list
[brp_2
].control
);
1448 if (retval
!= ERROR_OK
)
1454 static int aarch64_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
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 not set");
1466 if (breakpoint
->type
== BKPT_HARD
) {
1467 if ((breakpoint
->address
!= 0) && (breakpoint
->asid
!= 0)) {
1468 int brp_i
= breakpoint
->set
- 1;
1469 int brp_j
= breakpoint
->linked_BRP
;
1470 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1471 LOG_DEBUG("Invalid BRP number in breakpoint");
1474 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1475 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1476 brp_list
[brp_i
].used
= 0;
1477 brp_list
[brp_i
].value
= 0;
1478 brp_list
[brp_i
].control
= 0;
1479 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1480 + CPUDBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1481 brp_list
[brp_i
].control
);
1482 if (retval
!= ERROR_OK
)
1484 if ((brp_j
< 0) || (brp_j
>= aarch64
->brp_num
)) {
1485 LOG_DEBUG("Invalid BRP number in breakpoint");
1488 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_j
,
1489 brp_list
[brp_j
].control
, brp_list
[brp_j
].value
);
1490 brp_list
[brp_j
].used
= 0;
1491 brp_list
[brp_j
].value
= 0;
1492 brp_list
[brp_j
].control
= 0;
1493 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1494 + CPUDBG_BCR_BASE
+ 16 * brp_list
[brp_j
].BRPn
,
1495 brp_list
[brp_j
].control
);
1496 if (retval
!= ERROR_OK
)
1498 breakpoint
->linked_BRP
= 0;
1499 breakpoint
->set
= 0;
1503 int brp_i
= breakpoint
->set
- 1;
1504 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1505 LOG_DEBUG("Invalid BRP number in breakpoint");
1508 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_i
,
1509 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1510 brp_list
[brp_i
].used
= 0;
1511 brp_list
[brp_i
].value
= 0;
1512 brp_list
[brp_i
].control
= 0;
1513 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1514 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1515 brp_list
[brp_i
].control
);
1516 if (retval
!= ERROR_OK
)
1518 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1519 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1520 brp_list
[brp_i
].value
);
1521 if (retval
!= ERROR_OK
)
1523 breakpoint
->set
= 0;
1527 /* restore original instruction (kept in target endianness) */
1528 if (breakpoint
->length
== 4) {
1529 retval
= target_write_memory(target
,
1530 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1531 4, 1, breakpoint
->orig_instr
);
1532 if (retval
!= ERROR_OK
)
1535 retval
= target_write_memory(target
,
1536 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1537 2, 1, breakpoint
->orig_instr
);
1538 if (retval
!= ERROR_OK
)
1542 breakpoint
->set
= 0;
1547 static int aarch64_add_breakpoint(struct target
*target
,
1548 struct breakpoint
*breakpoint
)
1550 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1552 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1553 LOG_INFO("no hardware breakpoint available");
1554 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1557 if (breakpoint
->type
== BKPT_HARD
)
1558 aarch64
->brp_num_available
--;
1560 return aarch64_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1563 static int aarch64_add_context_breakpoint(struct target
*target
,
1564 struct breakpoint
*breakpoint
)
1566 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1568 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1569 LOG_INFO("no hardware breakpoint available");
1570 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1573 if (breakpoint
->type
== BKPT_HARD
)
1574 aarch64
->brp_num_available
--;
1576 return aarch64_set_context_breakpoint(target
, breakpoint
, 0x02); /* asid match */
1579 static int aarch64_add_hybrid_breakpoint(struct target
*target
,
1580 struct breakpoint
*breakpoint
)
1582 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1584 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1585 LOG_INFO("no hardware breakpoint available");
1586 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1589 if (breakpoint
->type
== BKPT_HARD
)
1590 aarch64
->brp_num_available
--;
1592 return aarch64_set_hybrid_breakpoint(target
, breakpoint
); /* ??? */
1596 static int aarch64_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1598 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1601 /* It is perfectly possible to remove breakpoints while the target is running */
1602 if (target
->state
!= TARGET_HALTED
) {
1603 LOG_WARNING("target not halted");
1604 return ERROR_TARGET_NOT_HALTED
;
1608 if (breakpoint
->set
) {
1609 aarch64_unset_breakpoint(target
, breakpoint
);
1610 if (breakpoint
->type
== BKPT_HARD
)
1611 aarch64
->brp_num_available
++;
1618 * Cortex-A8 Reset functions
1621 static int aarch64_assert_reset(struct target
*target
)
1623 struct armv8_common
*armv8
= target_to_armv8(target
);
1627 /* FIXME when halt is requested, make it work somehow... */
1629 /* Issue some kind of warm reset. */
1630 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
))
1631 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1632 else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1633 /* REVISIT handle "pulls" cases, if there's
1634 * hardware that needs them to work.
1636 jtag_add_reset(0, 1);
1638 LOG_ERROR("%s: how to reset?", target_name(target
));
1642 /* registers are now invalid */
1643 register_cache_invalidate(armv8
->arm
.core_cache
);
1645 target
->state
= TARGET_RESET
;
1650 static int aarch64_deassert_reset(struct target
*target
)
1656 /* be certain SRST is off */
1657 jtag_add_reset(0, 0);
1659 retval
= aarch64_poll(target
);
1660 if (retval
!= ERROR_OK
)
1663 if (target
->reset_halt
) {
1664 if (target
->state
!= TARGET_HALTED
) {
1665 LOG_WARNING("%s: ran after reset and before halt ...",
1666 target_name(target
));
1667 retval
= target_halt(target
);
1668 if (retval
!= ERROR_OK
)
1676 static int aarch64_write_apb_ab_memory(struct target
*target
,
1677 uint64_t address
, uint32_t size
,
1678 uint32_t count
, const uint8_t *buffer
)
1680 /* write memory through APB-AP */
1681 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1682 struct armv8_common
*armv8
= target_to_armv8(target
);
1683 struct arm
*arm
= &armv8
->arm
;
1684 int total_bytes
= count
* size
;
1686 int start_byte
= address
& 0x3;
1687 int end_byte
= (address
+ total_bytes
) & 0x3;
1690 uint8_t *tmp_buff
= NULL
;
1693 LOG_DEBUG("Writing APB-AP memory address 0x%" PRIx64
" size %" PRIu32
" count%" PRIu32
,
1694 address
, size
, count
);
1695 if (target
->state
!= TARGET_HALTED
) {
1696 LOG_WARNING("target not halted");
1697 return ERROR_TARGET_NOT_HALTED
;
1700 total_u32
= DIV_ROUND_UP((address
& 3) + total_bytes
, 4);
1702 /* Mark register R0 as dirty, as it will be used
1703 * for transferring the data.
1704 * It will be restored automatically when exiting
1707 reg
= armv8_reg_current(arm
, 1);
1710 reg
= armv8_reg_current(arm
, 0);
1713 /* clear any abort */
1714 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
, armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1715 if (retval
!= ERROR_OK
)
1718 /* This algorithm comes from either :
1719 * Cortex-A8 TRM Example 12-25
1720 * Cortex-R4 TRM Example 11-26
1721 * (slight differences)
1724 /* The algorithm only copies 32 bit words, so the buffer
1725 * should be expanded to include the words at either end.
1726 * The first and last words will be read first to avoid
1727 * corruption if needed.
1729 tmp_buff
= malloc(total_u32
* 4);
1731 if ((start_byte
!= 0) && (total_u32
> 1)) {
1732 /* First bytes not aligned - read the 32 bit word to avoid corrupting
1733 * the other bytes in the word.
1735 retval
= aarch64_read_apb_ab_memory(target
, (address
& ~0x3), 4, 1, tmp_buff
);
1736 if (retval
!= ERROR_OK
)
1737 goto error_free_buff_w
;
1740 /* If end of write is not aligned, or the write is less than 4 bytes */
1741 if ((end_byte
!= 0) ||
1742 ((total_u32
== 1) && (total_bytes
!= 4))) {
1744 /* Read the last word to avoid corruption during 32 bit write */
1745 int mem_offset
= (total_u32
-1) * 4;
1746 retval
= aarch64_read_apb_ab_memory(target
, (address
& ~0x3) + mem_offset
, 4, 1, &tmp_buff
[mem_offset
]);
1747 if (retval
!= ERROR_OK
)
1748 goto error_free_buff_w
;
1751 /* Copy the write buffer over the top of the temporary buffer */
1752 memcpy(&tmp_buff
[start_byte
], buffer
, total_bytes
);
1754 /* We now have a 32 bit aligned buffer that can be written */
1757 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1758 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1759 if (retval
!= ERROR_OK
)
1760 goto error_free_buff_w
;
1762 /* Set DTR mode to Normal*/
1763 dscr
= (dscr
& ~DSCR_EXT_DCC_MASK
) | DSCR_EXT_DCC_NON_BLOCKING
;
1764 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1765 armv8
->debug_base
+ CPUDBG_DSCR
, dscr
);
1766 if (retval
!= ERROR_OK
)
1767 goto error_free_buff_w
;
1770 LOG_WARNING("reading size >4 bytes not yet supported");
1771 goto error_unset_dtr_w
;
1774 retval
= aarch64_instr_write_data_dcc_64(arm
->dpm
, 0xd5330401, address
+4);
1775 if (retval
!= ERROR_OK
)
1776 goto error_unset_dtr_w
;
1778 dscr
= DSCR_INSTR_COMP
;
1779 while (i
< count
* size
) {
1782 memcpy(&val
, &buffer
[i
], size
);
1783 retval
= aarch64_instr_write_data_dcc(arm
->dpm
, 0xd5330500, val
);
1784 if (retval
!= ERROR_OK
)
1785 goto error_unset_dtr_w
;
1787 retval
= aarch64_exec_opcode(target
, 0xb81fc020, &dscr
);
1788 if (retval
!= ERROR_OK
)
1789 goto error_unset_dtr_w
;
1791 retval
= aarch64_exec_opcode(target
, 0x91001021, &dscr
);
1792 if (retval
!= ERROR_OK
)
1793 goto error_unset_dtr_w
;
1798 /* Check for sticky abort flags in the DSCR */
1799 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1800 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1801 if (retval
!= ERROR_OK
)
1802 goto error_free_buff_w
;
1803 if (dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
)) {
1804 /* Abort occurred - clear it and exit */
1805 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32
, dscr
);
1806 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1807 armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1808 goto error_free_buff_w
;
1816 /* Unset DTR mode */
1817 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1818 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1819 dscr
= (dscr
& ~DSCR_EXT_DCC_MASK
) | DSCR_EXT_DCC_NON_BLOCKING
;
1820 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1821 armv8
->debug_base
+ CPUDBG_DSCR
, dscr
);
1828 static int aarch64_read_apb_ab_memory(struct target
*target
,
1829 target_addr_t address
, uint32_t size
,
1830 uint32_t count
, uint8_t *buffer
)
1832 /* read memory through APB-AP */
1834 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1835 struct armv8_common
*armv8
= target_to_armv8(target
);
1836 struct arm
*arm
= &armv8
->arm
;
1839 uint8_t *tmp_buff
= NULL
;
1842 LOG_DEBUG("Reading APB-AP memory address 0x%" TARGET_PRIxADDR
" size %" PRIu32
" count%" PRIu32
,
1843 address
, size
, count
);
1844 if (target
->state
!= TARGET_HALTED
) {
1845 LOG_WARNING("target not halted");
1846 return ERROR_TARGET_NOT_HALTED
;
1849 /* Mark register R0 as dirty, as it will be used
1850 * for transferring the data.
1851 * It will be restored automatically when exiting
1854 reg
= armv8_reg_current(arm
, 0);
1857 /* clear any abort */
1858 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1859 armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1860 if (retval
!= ERROR_OK
)
1861 goto error_free_buff_r
;
1863 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1864 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1865 if (retval
!= ERROR_OK
)
1866 goto error_unset_dtr_r
;
1869 LOG_WARNING("reading size >4 bytes not yet supported");
1870 goto error_unset_dtr_r
;
1873 while (i
< count
* size
) {
1875 retval
= aarch64_instr_write_data_dcc_64(arm
->dpm
, 0xd5330400, address
+4);
1876 if (retval
!= ERROR_OK
)
1877 goto error_unset_dtr_r
;
1878 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1879 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1881 dscr
= DSCR_INSTR_COMP
;
1882 retval
= aarch64_exec_opcode(target
, 0xb85fc000, &dscr
);
1883 if (retval
!= ERROR_OK
)
1884 goto error_unset_dtr_r
;
1885 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1886 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1888 retval
= aarch64_instr_read_data_dcc(arm
->dpm
, 0xd5130400, &val
);
1889 if (retval
!= ERROR_OK
)
1890 goto error_unset_dtr_r
;
1891 memcpy(&buffer
[i
], &val
, size
);
1896 /* Clear any sticky error */
1897 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1898 armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1904 LOG_WARNING("DSCR = 0x%" PRIx32
, dscr
);
1905 /* Todo: Unset DTR mode */
1911 /* Clear any sticky error */
1912 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1913 armv8
->debug_base
+ CPUDBG_DRCR
, 1<<2);
1918 static int aarch64_read_phys_memory(struct target
*target
,
1919 target_addr_t address
, uint32_t size
,
1920 uint32_t count
, uint8_t *buffer
)
1922 struct armv8_common
*armv8
= target_to_armv8(target
);
1923 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1924 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
1925 uint8_t apsel
= swjdp
->apsel
;
1926 LOG_DEBUG("Reading memory at real address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
,
1927 address
, size
, count
);
1929 if (count
&& buffer
) {
1931 if (armv8
->memory_ap_available
&& (apsel
== armv8
->memory_ap
->ap_num
)) {
1933 /* read memory through AHB-AP */
1934 retval
= mem_ap_read_buf(armv8
->memory_ap
, buffer
, size
, count
, address
);
1936 /* read memory through APB-AP */
1937 retval
= aarch64_mmu_modify(target
, 0);
1938 if (retval
!= ERROR_OK
)
1940 retval
= aarch64_read_apb_ab_memory(target
, address
, size
, count
, buffer
);
1946 static int aarch64_read_memory(struct target
*target
, target_addr_t address
,
1947 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1949 int mmu_enabled
= 0;
1950 target_addr_t virt
, phys
;
1952 struct armv8_common
*armv8
= target_to_armv8(target
);
1953 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
1954 uint8_t apsel
= swjdp
->apsel
;
1956 /* aarch64 handles unaligned memory access */
1957 LOG_DEBUG("Reading memory at address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
, address
,
1960 /* determine if MMU was enabled on target stop */
1961 if (!armv8
->is_armv7r
) {
1962 retval
= aarch64_mmu(target
, &mmu_enabled
);
1963 if (retval
!= ERROR_OK
)
1967 if (armv8
->memory_ap_available
&& (apsel
== armv8
->memory_ap
->ap_num
)) {
1970 retval
= aarch64_virt2phys(target
, virt
, &phys
);
1971 if (retval
!= ERROR_OK
)
1974 LOG_DEBUG("Reading at virtual address. Translating v:0x%" TARGET_PRIxADDR
" to r:0x%" TARGET_PRIxADDR
,
1978 retval
= aarch64_read_phys_memory(target
, address
, size
, count
,
1982 retval
= aarch64_check_address(target
, address
);
1983 if (retval
!= ERROR_OK
)
1985 /* enable MMU as we could have disabled it for phys
1987 retval
= aarch64_mmu_modify(target
, 1);
1988 if (retval
!= ERROR_OK
)
1991 retval
= aarch64_read_apb_ab_memory(target
, address
, size
,
1997 static int aarch64_write_phys_memory(struct target
*target
,
1998 target_addr_t address
, uint32_t size
,
1999 uint32_t count
, const uint8_t *buffer
)
2001 struct armv8_common
*armv8
= target_to_armv8(target
);
2002 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2003 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
2004 uint8_t apsel
= swjdp
->apsel
;
2006 LOG_DEBUG("Writing memory to real address 0x%" TARGET_PRIxADDR
"; size %" PRId32
"; count %" PRId32
, address
,
2009 if (count
&& buffer
) {
2011 if (armv8
->memory_ap_available
&& (apsel
== armv8
->memory_ap
->ap_num
)) {
2013 /* write memory through AHB-AP */
2014 retval
= mem_ap_write_buf(armv8
->memory_ap
, buffer
, size
, count
, address
);
2017 /* write memory through APB-AP */
2018 if (!armv8
->is_armv7r
) {
2019 retval
= aarch64_mmu_modify(target
, 0);
2020 if (retval
!= ERROR_OK
)
2023 return aarch64_write_apb_ab_memory(target
, address
, size
, count
, buffer
);
2028 /* REVISIT this op is generic ARMv7-A/R stuff */
2029 if (retval
== ERROR_OK
&& target
->state
== TARGET_HALTED
) {
2030 struct arm_dpm
*dpm
= armv8
->arm
.dpm
;
2032 retval
= dpm
->prepare(dpm
);
2033 if (retval
!= ERROR_OK
)
2036 /* The Cache handling will NOT work with MMU active, the
2037 * wrong addresses will be invalidated!
2039 * For both ICache and DCache, walk all cache lines in the
2040 * address range. Cortex-A8 has fixed 64 byte line length.
2042 * REVISIT per ARMv7, these may trigger watchpoints ...
2045 /* invalidate I-Cache */
2046 if (armv8
->armv8_mmu
.armv8_cache
.i_cache_enabled
) {
2047 /* ICIMVAU - Invalidate Cache single entry
2049 * MCR p15, 0, r0, c7, c5, 1
2051 for (uint32_t cacheline
= address
;
2052 cacheline
< address
+ size
* count
;
2054 retval
= dpm
->instr_write_data_r0(dpm
,
2055 ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
2057 if (retval
!= ERROR_OK
)
2062 /* invalidate D-Cache */
2063 if (armv8
->armv8_mmu
.armv8_cache
.d_u_cache_enabled
) {
2064 /* DCIMVAC - Invalidate data Cache line
2066 * MCR p15, 0, r0, c7, c6, 1
2068 for (uint32_t cacheline
= address
;
2069 cacheline
< address
+ size
* count
;
2071 retval
= dpm
->instr_write_data_r0(dpm
,
2072 ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
2074 if (retval
!= ERROR_OK
)
2079 /* (void) */ dpm
->finish(dpm
);
2085 static int aarch64_write_memory(struct target
*target
, target_addr_t address
,
2086 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
2088 int mmu_enabled
= 0;
2089 target_addr_t virt
, phys
;
2091 struct armv8_common
*armv8
= target_to_armv8(target
);
2092 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2093 uint8_t apsel
= swjdp
->apsel
;
2095 /* aarch64 handles unaligned memory access */
2096 LOG_DEBUG("Writing memory at address 0x%" TARGET_PRIxADDR
"; size %" PRId32
2097 "; count %" PRId32
, address
, size
, count
);
2099 /* determine if MMU was enabled on target stop */
2100 if (!armv8
->is_armv7r
) {
2101 retval
= aarch64_mmu(target
, &mmu_enabled
);
2102 if (retval
!= ERROR_OK
)
2106 if (armv8
->memory_ap_available
&& (apsel
== armv8
->memory_ap
->ap_num
)) {
2107 LOG_DEBUG("Writing memory to address 0x%" TARGET_PRIxADDR
"; size %"
2108 PRId32
"; count %" PRId32
, address
, size
, count
);
2111 retval
= aarch64_virt2phys(target
, virt
, &phys
);
2112 if (retval
!= ERROR_OK
)
2115 LOG_DEBUG("Writing to virtual address. Translating v:0x%"
2116 TARGET_PRIxADDR
" to r:0x%" TARGET_PRIxADDR
, virt
, phys
);
2119 retval
= aarch64_write_phys_memory(target
, address
, size
,
2123 retval
= aarch64_check_address(target
, address
);
2124 if (retval
!= ERROR_OK
)
2126 /* enable MMU as we could have disabled it for phys access */
2127 retval
= aarch64_mmu_modify(target
, 1);
2128 if (retval
!= ERROR_OK
)
2131 retval
= aarch64_write_apb_ab_memory(target
, address
, size
, count
, buffer
);
2136 static int aarch64_handle_target_request(void *priv
)
2138 struct target
*target
= priv
;
2139 struct armv8_common
*armv8
= target_to_armv8(target
);
2142 if (!target_was_examined(target
))
2144 if (!target
->dbg_msg_enabled
)
2147 if (target
->state
== TARGET_RUNNING
) {
2150 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2151 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2153 /* check if we have data */
2154 while ((dscr
& DSCR_DTR_TX_FULL
) && (retval
== ERROR_OK
)) {
2155 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2156 armv8
->debug_base
+ CPUDBG_DTRTX
, &request
);
2157 if (retval
== ERROR_OK
) {
2158 target_request(target
, request
);
2159 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2160 armv8
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2168 static int aarch64_examine_first(struct target
*target
)
2170 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
2171 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2172 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2173 int retval
= ERROR_OK
;
2174 uint32_t pfr
, debug
, ctypr
, ttypr
, cpuid
;
2177 /* We do one extra read to ensure DAP is configured,
2178 * we call ahbap_debugport_init(swjdp) instead
2180 retval
= dap_dp_init(swjdp
);
2181 if (retval
!= ERROR_OK
)
2184 /* Search for the APB-AB - it is needed for access to debug registers */
2185 retval
= dap_find_ap(swjdp
, AP_TYPE_APB_AP
, &armv8
->debug_ap
);
2186 if (retval
!= ERROR_OK
) {
2187 LOG_ERROR("Could not find APB-AP for debug access");
2191 retval
= mem_ap_init(armv8
->debug_ap
);
2192 if (retval
!= ERROR_OK
) {
2193 LOG_ERROR("Could not initialize the APB-AP");
2197 armv8
->debug_ap
->memaccess_tck
= 80;
2199 /* Search for the AHB-AB */
2200 armv8
->memory_ap_available
= false;
2201 retval
= dap_find_ap(swjdp
, AP_TYPE_AHB_AP
, &armv8
->memory_ap
);
2202 if (retval
== ERROR_OK
) {
2203 retval
= mem_ap_init(armv8
->memory_ap
);
2204 if (retval
== ERROR_OK
)
2205 armv8
->memory_ap_available
= true;
2207 if (retval
!= ERROR_OK
) {
2208 /* AHB-AP not found or unavailable - use the CPU */
2209 LOG_DEBUG("No AHB-AP available for memory access");
2213 if (!target
->dbgbase_set
) {
2215 /* Get ROM Table base */
2217 int32_t coreidx
= target
->coreid
;
2218 retval
= dap_get_debugbase(armv8
->debug_ap
, &dbgbase
, &apid
);
2219 if (retval
!= ERROR_OK
)
2221 /* Lookup 0x15 -- Processor DAP */
2222 retval
= dap_lookup_cs_component(armv8
->debug_ap
, dbgbase
, 0x15,
2223 &armv8
->debug_base
, &coreidx
);
2224 if (retval
!= ERROR_OK
)
2226 LOG_DEBUG("Detected core %" PRId32
" dbgbase: %08" PRIx32
,
2227 coreidx
, armv8
->debug_base
);
2229 armv8
->debug_base
= target
->dbgbase
;
2231 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2232 armv8
->debug_base
+ 0x300, 0);
2233 if (retval
!= ERROR_OK
) {
2234 LOG_DEBUG("Examine %s failed", "oslock");
2238 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2239 armv8
->debug_base
+ 0x88, &cpuid
);
2240 LOG_DEBUG("0x88 = %x", cpuid
);
2242 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2243 armv8
->debug_base
+ 0x314, &cpuid
);
2244 LOG_DEBUG("0x314 = %x", cpuid
);
2246 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2247 armv8
->debug_base
+ 0x310, &cpuid
);
2248 LOG_DEBUG("0x310 = %x", cpuid
);
2249 if (retval
!= ERROR_OK
)
2252 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2253 armv8
->debug_base
+ CPUDBG_CPUID
, &cpuid
);
2254 if (retval
!= ERROR_OK
) {
2255 LOG_DEBUG("Examine %s failed", "CPUID");
2259 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2260 armv8
->debug_base
+ CPUDBG_CTYPR
, &ctypr
);
2261 if (retval
!= ERROR_OK
) {
2262 LOG_DEBUG("Examine %s failed", "CTYPR");
2266 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2267 armv8
->debug_base
+ CPUDBG_TTYPR
, &ttypr
);
2268 if (retval
!= ERROR_OK
) {
2269 LOG_DEBUG("Examine %s failed", "TTYPR");
2273 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2274 armv8
->debug_base
+ ID_AA64PFR0_EL1
, &pfr
);
2275 if (retval
!= ERROR_OK
) {
2276 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2279 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2280 armv8
->debug_base
+ ID_AA64DFR0_EL1
, &debug
);
2281 if (retval
!= ERROR_OK
) {
2282 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2286 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
2287 LOG_DEBUG("ctypr = 0x%08" PRIx32
, ctypr
);
2288 LOG_DEBUG("ttypr = 0x%08" PRIx32
, ttypr
);
2289 LOG_DEBUG("ID_AA64PFR0_EL1 = 0x%08" PRIx32
, pfr
);
2290 LOG_DEBUG("ID_AA64DFR0_EL1 = 0x%08" PRIx32
, debug
);
2292 armv8
->arm
.core_type
= ARM_MODE_MON
;
2293 armv8
->arm
.core_state
= ARM_STATE_AARCH64
;
2294 retval
= aarch64_dpm_setup(aarch64
, debug
);
2295 if (retval
!= ERROR_OK
)
2298 /* Setup Breakpoint Register Pairs */
2299 aarch64
->brp_num
= ((debug
>> 12) & 0x0F) + 1;
2300 aarch64
->brp_num_context
= ((debug
>> 28) & 0x0F) + 1;
2302 /* hack - no context bpt support yet */
2303 aarch64
->brp_num_context
= 0;
2305 aarch64
->brp_num_available
= aarch64
->brp_num
;
2306 aarch64
->brp_list
= calloc(aarch64
->brp_num
, sizeof(struct aarch64_brp
));
2307 for (i
= 0; i
< aarch64
->brp_num
; i
++) {
2308 aarch64
->brp_list
[i
].used
= 0;
2309 if (i
< (aarch64
->brp_num
-aarch64
->brp_num_context
))
2310 aarch64
->brp_list
[i
].type
= BRP_NORMAL
;
2312 aarch64
->brp_list
[i
].type
= BRP_CONTEXT
;
2313 aarch64
->brp_list
[i
].value
= 0;
2314 aarch64
->brp_list
[i
].control
= 0;
2315 aarch64
->brp_list
[i
].BRPn
= i
;
2318 LOG_DEBUG("Configured %i hw breakpoints", aarch64
->brp_num
);
2320 target_set_examined(target
);
2324 static int aarch64_examine(struct target
*target
)
2326 int retval
= ERROR_OK
;
2328 /* don't re-probe hardware after each reset */
2329 if (!target_was_examined(target
))
2330 retval
= aarch64_examine_first(target
);
2332 /* Configure core debug access */
2333 if (retval
== ERROR_OK
)
2334 retval
= aarch64_init_debug_access(target
);
2340 * Cortex-A8 target creation and initialization
2343 static int aarch64_init_target(struct command_context
*cmd_ctx
,
2344 struct target
*target
)
2346 /* examine_first() does a bunch of this */
2350 static int aarch64_init_arch_info(struct target
*target
,
2351 struct aarch64_common
*aarch64
, struct jtag_tap
*tap
)
2353 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2354 struct adiv5_dap
*dap
= armv8
->arm
.dap
;
2356 armv8
->arm
.dap
= dap
;
2358 /* Setup struct aarch64_common */
2359 aarch64
->common_magic
= AARCH64_COMMON_MAGIC
;
2360 /* tap has no dap initialized */
2362 tap
->dap
= dap_init();
2364 /* Leave (only) generic DAP stuff for debugport_init() */
2365 tap
->dap
->tap
= tap
;
2368 armv8
->arm
.dap
= tap
->dap
;
2370 aarch64
->fast_reg_read
= 0;
2372 /* register arch-specific functions */
2373 armv8
->examine_debug_reason
= NULL
;
2375 armv8
->post_debug_entry
= aarch64_post_debug_entry
;
2377 armv8
->pre_restore_context
= NULL
;
2379 armv8
->armv8_mmu
.read_physical_memory
= aarch64_read_phys_memory
;
2381 /* REVISIT v7a setup should be in a v7a-specific routine */
2382 armv8_init_arch_info(target
, armv8
);
2383 target_register_timer_callback(aarch64_handle_target_request
, 1, 1, target
);
2388 static int aarch64_target_create(struct target
*target
, Jim_Interp
*interp
)
2390 struct aarch64_common
*aarch64
= calloc(1, sizeof(struct aarch64_common
));
2392 aarch64
->armv8_common
.is_armv7r
= false;
2394 return aarch64_init_arch_info(target
, aarch64
, target
->tap
);
2397 static int aarch64_mmu(struct target
*target
, int *enabled
)
2399 if (target
->state
!= TARGET_HALTED
) {
2400 LOG_ERROR("%s: target not halted", __func__
);
2401 return ERROR_TARGET_INVALID
;
2404 *enabled
= target_to_aarch64(target
)->armv8_common
.armv8_mmu
.mmu_enabled
;
2408 static int aarch64_virt2phys(struct target
*target
, target_addr_t virt
,
2409 target_addr_t
*phys
)
2411 int retval
= ERROR_FAIL
;
2412 struct armv8_common
*armv8
= target_to_armv8(target
);
2413 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2414 uint8_t apsel
= swjdp
->apsel
;
2415 if (armv8
->memory_ap_available
&& (apsel
== armv8
->memory_ap
->ap_num
)) {
2417 retval
= armv8_mmu_translate_va(target
,
2419 if (retval
!= ERROR_OK
)
2422 } else {/* use this method if armv8->memory_ap not selected
2423 * mmu must be enable in order to get a correct translation */
2424 retval
= aarch64_mmu_modify(target
, 1);
2425 if (retval
!= ERROR_OK
)
2427 retval
= armv8_mmu_translate_va_pa(target
, virt
, phys
, 1);
2433 COMMAND_HANDLER(aarch64_handle_cache_info_command
)
2435 struct target
*target
= get_current_target(CMD_CTX
);
2436 struct armv8_common
*armv8
= target_to_armv8(target
);
2438 return armv8_handle_cache_info_command(CMD_CTX
,
2439 &armv8
->armv8_mmu
.armv8_cache
);
2443 COMMAND_HANDLER(aarch64_handle_dbginit_command
)
2445 struct target
*target
= get_current_target(CMD_CTX
);
2446 if (!target_was_examined(target
)) {
2447 LOG_ERROR("target not examined yet");
2451 return aarch64_init_debug_access(target
);
2453 COMMAND_HANDLER(aarch64_handle_smp_off_command
)
2455 struct target
*target
= get_current_target(CMD_CTX
);
2456 /* check target is an smp target */
2457 struct target_list
*head
;
2458 struct target
*curr
;
2459 head
= target
->head
;
2461 if (head
!= (struct target_list
*)NULL
) {
2462 while (head
!= (struct target_list
*)NULL
) {
2463 curr
= head
->target
;
2467 /* fixes the target display to the debugger */
2468 target
->gdb_service
->target
= target
;
2473 COMMAND_HANDLER(aarch64_handle_smp_on_command
)
2475 struct target
*target
= get_current_target(CMD_CTX
);
2476 struct target_list
*head
;
2477 struct target
*curr
;
2478 head
= target
->head
;
2479 if (head
!= (struct target_list
*)NULL
) {
2481 while (head
!= (struct target_list
*)NULL
) {
2482 curr
= head
->target
;
2490 COMMAND_HANDLER(aarch64_handle_smp_gdb_command
)
2492 struct target
*target
= get_current_target(CMD_CTX
);
2493 int retval
= ERROR_OK
;
2494 struct target_list
*head
;
2495 head
= target
->head
;
2496 if (head
!= (struct target_list
*)NULL
) {
2497 if (CMD_ARGC
== 1) {
2499 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], coreid
);
2500 if (ERROR_OK
!= retval
)
2502 target
->gdb_service
->core
[1] = coreid
;
2505 command_print(CMD_CTX
, "gdb coreid %" PRId32
" -> %" PRId32
, target
->gdb_service
->core
[0]
2506 , target
->gdb_service
->core
[1]);
2511 static const struct command_registration aarch64_exec_command_handlers
[] = {
2513 .name
= "cache_info",
2514 .handler
= aarch64_handle_cache_info_command
,
2515 .mode
= COMMAND_EXEC
,
2516 .help
= "display information about target caches",
2521 .handler
= aarch64_handle_dbginit_command
,
2522 .mode
= COMMAND_EXEC
,
2523 .help
= "Initialize core debug",
2526 { .name
= "smp_off",
2527 .handler
= aarch64_handle_smp_off_command
,
2528 .mode
= COMMAND_EXEC
,
2529 .help
= "Stop smp handling",
2534 .handler
= aarch64_handle_smp_on_command
,
2535 .mode
= COMMAND_EXEC
,
2536 .help
= "Restart smp handling",
2541 .handler
= aarch64_handle_smp_gdb_command
,
2542 .mode
= COMMAND_EXEC
,
2543 .help
= "display/fix current core played to gdb",
2548 COMMAND_REGISTRATION_DONE
2550 static const struct command_registration aarch64_command_handlers
[] = {
2552 .chain
= arm_command_handlers
,
2555 .chain
= armv8_command_handlers
,
2559 .mode
= COMMAND_ANY
,
2560 .help
= "Cortex-A command group",
2562 .chain
= aarch64_exec_command_handlers
,
2564 COMMAND_REGISTRATION_DONE
2567 struct target_type aarch64_target
= {
2570 .poll
= aarch64_poll
,
2571 .arch_state
= armv8_arch_state
,
2573 .halt
= aarch64_halt
,
2574 .resume
= aarch64_resume
,
2575 .step
= aarch64_step
,
2577 .assert_reset
= aarch64_assert_reset
,
2578 .deassert_reset
= aarch64_deassert_reset
,
2580 /* REVISIT allow exporting VFP3 registers ... */
2581 .get_gdb_reg_list
= armv8_get_gdb_reg_list
,
2583 .read_memory
= aarch64_read_memory
,
2584 .write_memory
= aarch64_write_memory
,
2586 .checksum_memory
= arm_checksum_memory
,
2587 .blank_check_memory
= arm_blank_check_memory
,
2589 .run_algorithm
= armv4_5_run_algorithm
,
2591 .add_breakpoint
= aarch64_add_breakpoint
,
2592 .add_context_breakpoint
= aarch64_add_context_breakpoint
,
2593 .add_hybrid_breakpoint
= aarch64_add_hybrid_breakpoint
,
2594 .remove_breakpoint
= aarch64_remove_breakpoint
,
2595 .add_watchpoint
= NULL
,
2596 .remove_watchpoint
= NULL
,
2598 .commands
= aarch64_command_handlers
,
2599 .target_create
= aarch64_target_create
,
2600 .init_target
= aarch64_init_target
,
2601 .examine
= aarch64_examine
,
2603 .read_phys_memory
= aarch64_read_phys_memory
,
2604 .write_phys_memory
= aarch64_write_phys_memory
,
2606 .virt2phys
= aarch64_virt2phys
,