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>
43 static int aarch64_poll(struct target
*target
);
44 static int aarch64_debug_entry(struct target
*target
);
45 static int aarch64_restore_context(struct target
*target
, bool bpwp
);
46 static int aarch64_set_breakpoint(struct target
*target
,
47 struct breakpoint
*breakpoint
, uint8_t matchmode
);
48 static int aarch64_set_context_breakpoint(struct target
*target
,
49 struct breakpoint
*breakpoint
, uint8_t matchmode
);
50 static int aarch64_set_hybrid_breakpoint(struct target
*target
,
51 struct breakpoint
*breakpoint
);
52 static int aarch64_unset_breakpoint(struct target
*target
,
53 struct breakpoint
*breakpoint
);
54 static int aarch64_mmu(struct target
*target
, int *enabled
);
55 static int aarch64_virt2phys(struct target
*target
,
56 target_addr_t virt
, target_addr_t
*phys
);
57 static int aarch64_read_apb_ap_memory(struct target
*target
,
58 uint64_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
);
60 #define foreach_smp_target(pos, head) \
61 for (pos = head; (pos != NULL); pos = pos->next)
63 static int aarch64_restore_system_control_reg(struct target
*target
)
65 enum arm_mode target_mode
= ARM_MODE_ANY
;
66 int retval
= ERROR_OK
;
69 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
70 struct armv8_common
*armv8
= target_to_armv8(target
);
72 if (aarch64
->system_control_reg
!= aarch64
->system_control_reg_curr
) {
73 aarch64
->system_control_reg_curr
= aarch64
->system_control_reg
;
74 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
76 switch (armv8
->arm
.core_mode
) {
78 target_mode
= ARMV8_64_EL1H
;
82 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL1
, 0);
86 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL2
, 0);
90 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL3
, 0);
97 instr
= ARMV4_5_MCR(15, 0, 0, 1, 0, 0);
101 LOG_INFO("cannot read system control register in this mode");
105 if (target_mode
!= ARM_MODE_ANY
)
106 armv8_dpm_modeswitch(&armv8
->dpm
, target_mode
);
108 retval
= armv8
->dpm
.instr_write_data_r0(&armv8
->dpm
, instr
, aarch64
->system_control_reg
);
109 if (retval
!= ERROR_OK
)
112 if (target_mode
!= ARM_MODE_ANY
)
113 armv8_dpm_modeswitch(&armv8
->dpm
, ARM_MODE_ANY
);
119 /* modify system_control_reg in order to enable or disable mmu for :
120 * - virt2phys address conversion
121 * - read or write memory in phys or virt address */
122 static int aarch64_mmu_modify(struct target
*target
, int enable
)
124 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
125 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
126 int retval
= ERROR_OK
;
130 /* if mmu enabled at target stop and mmu not enable */
131 if (!(aarch64
->system_control_reg
& 0x1U
)) {
132 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
135 if (!(aarch64
->system_control_reg_curr
& 0x1U
))
136 aarch64
->system_control_reg_curr
|= 0x1U
;
138 if (aarch64
->system_control_reg_curr
& 0x4U
) {
139 /* data cache is active */
140 aarch64
->system_control_reg_curr
&= ~0x4U
;
141 /* flush data cache armv8 function to be called */
142 if (armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache
)
143 armv8
->armv8_mmu
.armv8_cache
.flush_all_data_cache(target
);
145 if ((aarch64
->system_control_reg_curr
& 0x1U
)) {
146 aarch64
->system_control_reg_curr
&= ~0x1U
;
150 switch (armv8
->arm
.core_mode
) {
154 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL1
, 0);
158 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL2
, 0);
162 instr
= ARMV8_MSR_GP(SYSTEM_SCTLR_EL3
, 0);
165 LOG_DEBUG("unknown cpu state 0x%x" PRIx32
, armv8
->arm
.core_state
);
169 retval
= armv8
->dpm
.instr_write_data_r0(&armv8
->dpm
, instr
,
170 aarch64
->system_control_reg_curr
);
175 * Basic debug access, very low level assumes state is saved
177 static int aarch64_init_debug_access(struct target
*target
)
179 struct armv8_common
*armv8
= target_to_armv8(target
);
185 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
186 armv8
->debug_base
+ CPUV8_DBG_OSLAR
, 0);
187 if (retval
!= ERROR_OK
) {
188 LOG_DEBUG("Examine %s failed", "oslock");
192 /* Clear Sticky Power Down status Bit in PRSR to enable access to
193 the registers in the Core Power Domain */
194 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
195 armv8
->debug_base
+ CPUV8_DBG_PRSR
, &dummy
);
196 if (retval
!= ERROR_OK
)
200 * Static CTI configuration:
201 * Channel 0 -> trigger outputs HALT request to PE
202 * Channel 1 -> trigger outputs Resume request to PE
203 * Gate all channel trigger events from entering the CTM
207 retval
= arm_cti_enable(armv8
->cti
, true);
208 /* By default, gate all channel events to and from the CTM */
209 if (retval
== ERROR_OK
)
210 retval
= arm_cti_write_reg(armv8
->cti
, CTI_GATE
, 0);
211 /* output halt requests to PE on channel 0 event */
212 if (retval
== ERROR_OK
)
213 retval
= arm_cti_write_reg(armv8
->cti
, CTI_OUTEN0
, CTI_CHNL(0));
214 /* output restart requests to PE on channel 1 event */
215 if (retval
== ERROR_OK
)
216 retval
= arm_cti_write_reg(armv8
->cti
, CTI_OUTEN1
, CTI_CHNL(1));
217 if (retval
!= ERROR_OK
)
220 /* Resync breakpoint registers */
225 /* Write to memory mapped registers directly with no cache or mmu handling */
226 static int aarch64_dap_write_memap_register_u32(struct target
*target
,
231 struct armv8_common
*armv8
= target_to_armv8(target
);
233 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
, address
, value
);
238 static int aarch64_dpm_setup(struct aarch64_common
*a8
, uint64_t debug
)
240 struct arm_dpm
*dpm
= &a8
->armv8_common
.dpm
;
243 dpm
->arm
= &a8
->armv8_common
.arm
;
246 retval
= armv8_dpm_setup(dpm
);
247 if (retval
== ERROR_OK
)
248 retval
= armv8_dpm_initialize(dpm
);
253 static int aarch64_set_dscr_bits(struct target
*target
, unsigned long bit_mask
, unsigned long value
)
255 struct armv8_common
*armv8
= target_to_armv8(target
);
256 return armv8_set_dbgreg_bits(armv8
, CPUV8_DBG_DSCR
, bit_mask
, value
);
259 static int aarch64_check_state_one(struct target
*target
,
260 uint32_t mask
, uint32_t val
, int *p_result
, uint32_t *p_prsr
)
262 struct armv8_common
*armv8
= target_to_armv8(target
);
266 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
267 armv8
->debug_base
+ CPUV8_DBG_PRSR
, &prsr
);
268 if (retval
!= ERROR_OK
)
275 *p_result
= (prsr
& mask
) == (val
& mask
);
280 static int aarch64_wait_halt_one(struct target
*target
)
282 int retval
= ERROR_OK
;
285 int64_t then
= timeval_ms();
289 retval
= aarch64_check_state_one(target
, PRSR_HALT
, PRSR_HALT
, &halted
, &prsr
);
290 if (retval
!= ERROR_OK
|| halted
)
293 if (timeval_ms() > then
+ 1000) {
294 retval
= ERROR_TARGET_TIMEOUT
;
295 LOG_DEBUG("target %s timeout, prsr=0x%08"PRIx32
, target_name(target
), prsr
);
302 static int aarch64_prepare_halt_smp(struct target
*target
, bool exc_target
, struct target
**p_first
)
304 int retval
= ERROR_OK
;
305 struct target_list
*head
= target
->head
;
306 struct target
*first
= NULL
;
308 LOG_DEBUG("target %s exc %i", target_name(target
), exc_target
);
310 while (head
!= NULL
) {
311 struct target
*curr
= head
->target
;
312 struct armv8_common
*armv8
= target_to_armv8(curr
);
315 if (exc_target
&& curr
== target
)
317 if (!target_was_examined(curr
))
319 if (curr
->state
!= TARGET_RUNNING
)
322 /* HACK: mark this target as prepared for halting */
323 curr
->debug_reason
= DBG_REASON_DBGRQ
;
325 /* open the gate for channel 0 to let HALT requests pass to the CTM */
326 retval
= arm_cti_ungate_channel(armv8
->cti
, 0);
327 if (retval
== ERROR_OK
)
328 retval
= aarch64_set_dscr_bits(curr
, DSCR_HDE
, DSCR_HDE
);
329 if (retval
!= ERROR_OK
)
332 LOG_DEBUG("target %s prepared", target_name(curr
));
339 if (exc_target
&& first
)
348 static int aarch64_halt_one(struct target
*target
, enum halt_mode mode
)
350 int retval
= ERROR_OK
;
351 struct armv8_common
*armv8
= target_to_armv8(target
);
353 LOG_DEBUG("%s", target_name(target
));
355 /* allow Halting Debug Mode */
356 retval
= aarch64_set_dscr_bits(target
, DSCR_HDE
, DSCR_HDE
);
357 if (retval
!= ERROR_OK
)
360 /* trigger an event on channel 0, this outputs a halt request to the PE */
361 retval
= arm_cti_pulse_channel(armv8
->cti
, 0);
362 if (retval
!= ERROR_OK
)
365 if (mode
== HALT_SYNC
) {
366 retval
= aarch64_wait_halt_one(target
);
367 if (retval
!= ERROR_OK
) {
368 if (retval
== ERROR_TARGET_TIMEOUT
)
369 LOG_ERROR("Timeout waiting for target %s halt", target_name(target
));
377 static int aarch64_halt_smp(struct target
*target
, bool exc_target
)
379 struct target
*next
= target
;
382 /* prepare halt on all PEs of the group */
383 retval
= aarch64_prepare_halt_smp(target
, exc_target
, &next
);
385 if (exc_target
&& next
== target
)
388 /* halt the target PE */
389 if (retval
== ERROR_OK
)
390 retval
= aarch64_halt_one(next
, HALT_LAZY
);
392 if (retval
!= ERROR_OK
)
395 /* wait for all PEs to halt */
396 int64_t then
= timeval_ms();
398 bool all_halted
= true;
399 struct target_list
*head
;
402 foreach_smp_target(head
, target
->head
) {
407 if (!target_was_examined(curr
))
410 retval
= aarch64_check_state_one(curr
, PRSR_HALT
, PRSR_HALT
, &halted
, NULL
);
411 if (retval
!= ERROR_OK
|| !halted
) {
420 if (timeval_ms() > then
+ 1000) {
421 retval
= ERROR_TARGET_TIMEOUT
;
426 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
427 * and it looks like the CTI's are not connected by a common
428 * trigger matrix. It seems that we need to halt one core in each
429 * cluster explicitly. So if we find that a core has not halted
430 * yet, we trigger an explicit halt for the second cluster.
432 retval
= aarch64_halt_one(curr
, HALT_LAZY
);
433 if (retval
!= ERROR_OK
)
440 static int update_halt_gdb(struct target
*target
, enum target_debug_reason debug_reason
)
442 struct target
*gdb_target
= NULL
;
443 struct target_list
*head
;
446 if (debug_reason
== DBG_REASON_NOTHALTED
) {
447 LOG_INFO("Halting remaining targets in SMP group");
448 aarch64_halt_smp(target
, true);
451 /* poll all targets in the group, but skip the target that serves GDB */
452 foreach_smp_target(head
, target
->head
) {
454 /* skip calling context */
457 if (!target_was_examined(curr
))
459 /* skip targets that were already halted */
460 if (curr
->state
== TARGET_HALTED
)
462 /* remember the gdb_service->target */
463 if (curr
->gdb_service
!= NULL
)
464 gdb_target
= curr
->gdb_service
->target
;
466 if (curr
== gdb_target
)
469 /* avoid recursion in aarch64_poll() */
475 /* after all targets were updated, poll the gdb serving target */
476 if (gdb_target
!= NULL
&& gdb_target
!= target
)
477 aarch64_poll(gdb_target
);
483 * Aarch64 Run control
486 static int aarch64_poll(struct target
*target
)
488 enum target_state prev_target_state
;
489 int retval
= ERROR_OK
;
492 retval
= aarch64_check_state_one(target
,
493 PRSR_HALT
, PRSR_HALT
, &halted
, NULL
);
494 if (retval
!= ERROR_OK
)
498 prev_target_state
= target
->state
;
499 if (prev_target_state
!= TARGET_HALTED
) {
500 enum target_debug_reason debug_reason
= target
->debug_reason
;
502 /* We have a halting debug event */
503 target
->state
= TARGET_HALTED
;
504 LOG_DEBUG("Target %s halted", target_name(target
));
505 retval
= aarch64_debug_entry(target
);
506 if (retval
!= ERROR_OK
)
510 update_halt_gdb(target
, debug_reason
);
512 switch (prev_target_state
) {
516 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
518 case TARGET_DEBUG_RUNNING
:
519 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
526 target
->state
= TARGET_RUNNING
;
531 static int aarch64_halt(struct target
*target
)
534 return aarch64_halt_smp(target
, false);
536 return aarch64_halt_one(target
, HALT_SYNC
);
539 static int aarch64_restore_one(struct target
*target
, int current
,
540 uint64_t *address
, int handle_breakpoints
, int debug_execution
)
542 struct armv8_common
*armv8
= target_to_armv8(target
);
543 struct arm
*arm
= &armv8
->arm
;
547 LOG_DEBUG("%s", target_name(target
));
549 if (!debug_execution
)
550 target_free_all_working_areas(target
);
552 /* current = 1: continue on current pc, otherwise continue at <address> */
553 resume_pc
= buf_get_u64(arm
->pc
->value
, 0, 64);
555 resume_pc
= *address
;
557 *address
= resume_pc
;
559 /* Make sure that the Armv7 gdb thumb fixups does not
560 * kill the return address
562 switch (arm
->core_state
) {
564 resume_pc
&= 0xFFFFFFFC;
566 case ARM_STATE_AARCH64
:
567 resume_pc
&= 0xFFFFFFFFFFFFFFFC;
569 case ARM_STATE_THUMB
:
570 case ARM_STATE_THUMB_EE
:
571 /* When the return address is loaded into PC
572 * bit 0 must be 1 to stay in Thumb state
576 case ARM_STATE_JAZELLE
:
577 LOG_ERROR("How do I resume into Jazelle state??");
580 LOG_DEBUG("resume pc = 0x%016" PRIx64
, resume_pc
);
581 buf_set_u64(arm
->pc
->value
, 0, 64, resume_pc
);
585 /* called it now before restoring context because it uses cpu
586 * register r0 for restoring system control register */
587 retval
= aarch64_restore_system_control_reg(target
);
588 if (retval
== ERROR_OK
)
589 retval
= aarch64_restore_context(target
, handle_breakpoints
);
595 * prepare single target for restart
599 static int aarch64_prepare_restart_one(struct target
*target
)
601 struct armv8_common
*armv8
= target_to_armv8(target
);
606 LOG_DEBUG("%s", target_name(target
));
608 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
609 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
610 if (retval
!= ERROR_OK
)
613 if ((dscr
& DSCR_ITE
) == 0)
614 LOG_ERROR("DSCR.ITE must be set before leaving debug!");
615 if ((dscr
& DSCR_ERR
) != 0)
616 LOG_ERROR("DSCR.ERR must be cleared before leaving debug!");
618 /* acknowledge a pending CTI halt event */
619 retval
= arm_cti_ack_events(armv8
->cti
, CTI_TRIG(HALT
));
621 * open the CTI gate for channel 1 so that the restart events
622 * get passed along to all PEs. Also close gate for channel 0
623 * to isolate the PE from halt events.
625 if (retval
== ERROR_OK
)
626 retval
= arm_cti_ungate_channel(armv8
->cti
, 1);
627 if (retval
== ERROR_OK
)
628 retval
= arm_cti_gate_channel(armv8
->cti
, 0);
630 /* make sure that DSCR.HDE is set */
631 if (retval
== ERROR_OK
) {
633 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
634 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
637 /* clear sticky bits in PRSR, SDR is now 0 */
638 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
639 armv8
->debug_base
+ CPUV8_DBG_PRSR
, &tmp
);
644 static int aarch64_do_restart_one(struct target
*target
, enum restart_mode mode
)
646 struct armv8_common
*armv8
= target_to_armv8(target
);
649 LOG_DEBUG("%s", target_name(target
));
651 /* trigger an event on channel 1, generates a restart request to the PE */
652 retval
= arm_cti_pulse_channel(armv8
->cti
, 1);
653 if (retval
!= ERROR_OK
)
656 if (mode
== RESTART_SYNC
) {
657 int64_t then
= timeval_ms();
661 * if PRSR.SDR is set now, the target did restart, even
662 * if it's now already halted again (e.g. due to breakpoint)
664 retval
= aarch64_check_state_one(target
,
665 PRSR_SDR
, PRSR_SDR
, &resumed
, NULL
);
666 if (retval
!= ERROR_OK
|| resumed
)
669 if (timeval_ms() > then
+ 1000) {
670 LOG_ERROR("%s: Timeout waiting for resume"PRIx32
, target_name(target
));
671 retval
= ERROR_TARGET_TIMEOUT
;
677 if (retval
!= ERROR_OK
)
680 target
->debug_reason
= DBG_REASON_NOTHALTED
;
681 target
->state
= TARGET_RUNNING
;
686 static int aarch64_restart_one(struct target
*target
, enum restart_mode mode
)
690 LOG_DEBUG("%s", target_name(target
));
692 retval
= aarch64_prepare_restart_one(target
);
693 if (retval
== ERROR_OK
)
694 retval
= aarch64_do_restart_one(target
, mode
);
700 * prepare all but the current target for restart
702 static int aarch64_prep_restart_smp(struct target
*target
, int handle_breakpoints
, struct target
**p_first
)
704 int retval
= ERROR_OK
;
705 struct target_list
*head
;
706 struct target
*first
= NULL
;
709 foreach_smp_target(head
, target
->head
) {
710 struct target
*curr
= head
->target
;
712 /* skip calling target */
715 if (!target_was_examined(curr
))
717 if (curr
->state
!= TARGET_HALTED
)
720 /* resume at current address, not in step mode */
721 retval
= aarch64_restore_one(curr
, 1, &address
, handle_breakpoints
, 0);
722 if (retval
== ERROR_OK
)
723 retval
= aarch64_prepare_restart_one(curr
);
724 if (retval
!= ERROR_OK
) {
725 LOG_ERROR("failed to restore target %s", target_name(curr
));
728 /* remember the first valid target in the group */
740 static int aarch64_step_restart_smp(struct target
*target
)
742 int retval
= ERROR_OK
;
743 struct target_list
*head
;
744 struct target
*first
= NULL
;
746 LOG_DEBUG("%s", target_name(target
));
748 retval
= aarch64_prep_restart_smp(target
, 0, &first
);
749 if (retval
!= ERROR_OK
)
753 retval
= aarch64_do_restart_one(first
, RESTART_LAZY
);
754 if (retval
!= ERROR_OK
) {
755 LOG_DEBUG("error restarting target %s", target_name(first
));
759 int64_t then
= timeval_ms();
761 struct target
*curr
= target
;
762 bool all_resumed
= true;
764 foreach_smp_target(head
, target
->head
) {
773 retval
= aarch64_check_state_one(curr
,
774 PRSR_SDR
, PRSR_SDR
, &resumed
, &prsr
);
775 if (retval
!= ERROR_OK
|| (!resumed
&& (prsr
& PRSR_HALT
))) {
780 if (curr
->state
!= TARGET_RUNNING
) {
781 curr
->state
= TARGET_RUNNING
;
782 curr
->debug_reason
= DBG_REASON_NOTHALTED
;
783 target_call_event_callbacks(curr
, TARGET_EVENT_RESUMED
);
790 if (timeval_ms() > then
+ 1000) {
791 LOG_ERROR("%s: timeout waiting for target resume", __func__
);
792 retval
= ERROR_TARGET_TIMEOUT
;
796 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
797 * and it looks like the CTI's are not connected by a common
798 * trigger matrix. It seems that we need to halt one core in each
799 * cluster explicitly. So if we find that a core has not halted
800 * yet, we trigger an explicit resume for the second cluster.
802 retval
= aarch64_do_restart_one(curr
, RESTART_LAZY
);
803 if (retval
!= ERROR_OK
)
810 static int aarch64_resume(struct target
*target
, int current
,
811 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
814 uint64_t addr
= address
;
816 if (target
->state
!= TARGET_HALTED
)
817 return ERROR_TARGET_NOT_HALTED
;
820 * If this target is part of a SMP group, prepare the others
821 * targets for resuming. This involves restoring the complete
822 * target register context and setting up CTI gates to accept
823 * resume events from the trigger matrix.
826 retval
= aarch64_prep_restart_smp(target
, handle_breakpoints
, NULL
);
827 if (retval
!= ERROR_OK
)
831 /* all targets prepared, restore and restart the current target */
832 retval
= aarch64_restore_one(target
, current
, &addr
, handle_breakpoints
,
834 if (retval
== ERROR_OK
)
835 retval
= aarch64_restart_one(target
, RESTART_SYNC
);
836 if (retval
!= ERROR_OK
)
840 int64_t then
= timeval_ms();
842 struct target
*curr
= target
;
843 struct target_list
*head
;
844 bool all_resumed
= true;
846 foreach_smp_target(head
, target
->head
) {
853 if (!target_was_examined(curr
))
856 retval
= aarch64_check_state_one(curr
,
857 PRSR_SDR
, PRSR_SDR
, &resumed
, &prsr
);
858 if (retval
!= ERROR_OK
|| (!resumed
&& (prsr
& PRSR_HALT
))) {
863 if (curr
->state
!= TARGET_RUNNING
) {
864 curr
->state
= TARGET_RUNNING
;
865 curr
->debug_reason
= DBG_REASON_NOTHALTED
;
866 target_call_event_callbacks(curr
, TARGET_EVENT_RESUMED
);
873 if (timeval_ms() > then
+ 1000) {
874 LOG_ERROR("%s: timeout waiting for target %s to resume", __func__
, target_name(curr
));
875 retval
= ERROR_TARGET_TIMEOUT
;
880 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
881 * and it looks like the CTI's are not connected by a common
882 * trigger matrix. It seems that we need to halt one core in each
883 * cluster explicitly. So if we find that a core has not halted
884 * yet, we trigger an explicit resume for the second cluster.
886 retval
= aarch64_do_restart_one(curr
, RESTART_LAZY
);
887 if (retval
!= ERROR_OK
)
892 if (retval
!= ERROR_OK
)
895 target
->debug_reason
= DBG_REASON_NOTHALTED
;
897 if (!debug_execution
) {
898 target
->state
= TARGET_RUNNING
;
899 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
900 LOG_DEBUG("target resumed at 0x%" PRIx64
, addr
);
902 target
->state
= TARGET_DEBUG_RUNNING
;
903 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
904 LOG_DEBUG("target debug resumed at 0x%" PRIx64
, addr
);
910 static int aarch64_debug_entry(struct target
*target
)
912 int retval
= ERROR_OK
;
913 struct armv8_common
*armv8
= target_to_armv8(target
);
914 struct arm_dpm
*dpm
= &armv8
->dpm
;
915 enum arm_state core_state
;
918 /* make sure to clear all sticky errors */
919 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
920 armv8
->debug_base
+ CPUV8_DBG_DRCR
, DRCR_CSE
);
921 if (retval
== ERROR_OK
)
922 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
923 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
924 if (retval
== ERROR_OK
)
925 retval
= arm_cti_ack_events(armv8
->cti
, CTI_TRIG(HALT
));
927 if (retval
!= ERROR_OK
)
930 LOG_DEBUG("%s dscr = 0x%08" PRIx32
, target_name(target
), dscr
);
933 core_state
= armv8_dpm_get_core_state(dpm
);
934 armv8_select_opcodes(armv8
, core_state
== ARM_STATE_AARCH64
);
935 armv8_select_reg_access(armv8
, core_state
== ARM_STATE_AARCH64
);
937 /* close the CTI gate for all events */
938 if (retval
== ERROR_OK
)
939 retval
= arm_cti_write_reg(armv8
->cti
, CTI_GATE
, 0);
940 /* discard async exceptions */
941 if (retval
== ERROR_OK
)
942 retval
= dpm
->instr_cpsr_sync(dpm
);
943 if (retval
!= ERROR_OK
)
946 /* Examine debug reason */
947 armv8_dpm_report_dscr(dpm
, dscr
);
949 /* save address of instruction that triggered the watchpoint? */
950 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
954 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
955 armv8
->debug_base
+ CPUV8_DBG_WFAR1
,
957 if (retval
!= ERROR_OK
)
961 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
962 armv8
->debug_base
+ CPUV8_DBG_WFAR0
,
964 if (retval
!= ERROR_OK
)
967 armv8_dpm_report_wfar(&armv8
->dpm
, wfar
);
970 retval
= armv8_dpm_read_current_registers(&armv8
->dpm
);
972 if (retval
== ERROR_OK
&& armv8
->post_debug_entry
)
973 retval
= armv8
->post_debug_entry(target
);
978 static int aarch64_post_debug_entry(struct target
*target
)
980 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
981 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
983 enum arm_mode target_mode
= ARM_MODE_ANY
;
986 switch (armv8
->arm
.core_mode
) {
988 target_mode
= ARMV8_64_EL1H
;
992 instr
= ARMV8_MRS(SYSTEM_SCTLR_EL1
, 0);
996 instr
= ARMV8_MRS(SYSTEM_SCTLR_EL2
, 0);
1000 instr
= ARMV8_MRS(SYSTEM_SCTLR_EL3
, 0);
1007 instr
= ARMV4_5_MRC(15, 0, 0, 1, 0, 0);
1011 LOG_INFO("cannot read system control register in this mode");
1015 if (target_mode
!= ARM_MODE_ANY
)
1016 armv8_dpm_modeswitch(&armv8
->dpm
, target_mode
);
1018 retval
= armv8
->dpm
.instr_read_data_r0(&armv8
->dpm
, instr
, &aarch64
->system_control_reg
);
1019 if (retval
!= ERROR_OK
)
1022 if (target_mode
!= ARM_MODE_ANY
)
1023 armv8_dpm_modeswitch(&armv8
->dpm
, ARM_MODE_ANY
);
1025 LOG_DEBUG("System_register: %8.8" PRIx32
, aarch64
->system_control_reg
);
1026 aarch64
->system_control_reg_curr
= aarch64
->system_control_reg
;
1028 if (armv8
->armv8_mmu
.armv8_cache
.info
== -1) {
1029 armv8_identify_cache(armv8
);
1030 armv8_read_mpidr(armv8
);
1033 armv8
->armv8_mmu
.mmu_enabled
=
1034 (aarch64
->system_control_reg
& 0x1U
) ? 1 : 0;
1035 armv8
->armv8_mmu
.armv8_cache
.d_u_cache_enabled
=
1036 (aarch64
->system_control_reg
& 0x4U
) ? 1 : 0;
1037 armv8
->armv8_mmu
.armv8_cache
.i_cache_enabled
=
1038 (aarch64
->system_control_reg
& 0x1000U
) ? 1 : 0;
1043 * single-step a target
1045 static int aarch64_step(struct target
*target
, int current
, target_addr_t address
,
1046 int handle_breakpoints
)
1048 struct armv8_common
*armv8
= target_to_armv8(target
);
1049 int saved_retval
= ERROR_OK
;
1053 if (target
->state
!= TARGET_HALTED
) {
1054 LOG_WARNING("target not halted");
1055 return ERROR_TARGET_NOT_HALTED
;
1058 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1059 armv8
->debug_base
+ CPUV8_DBG_EDECR
, &edecr
);
1060 /* make sure EDECR.SS is not set when restoring the register */
1062 if (retval
== ERROR_OK
) {
1064 /* set EDECR.SS to enter hardware step mode */
1065 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1066 armv8
->debug_base
+ CPUV8_DBG_EDECR
, (edecr
|0x4));
1068 /* disable interrupts while stepping */
1069 if (retval
== ERROR_OK
)
1070 retval
= aarch64_set_dscr_bits(target
, 0x3 << 22, 0x3 << 22);
1071 /* bail out if stepping setup has failed */
1072 if (retval
!= ERROR_OK
)
1075 if (target
->smp
&& !handle_breakpoints
) {
1077 * isolate current target so that it doesn't get resumed
1078 * together with the others
1080 retval
= arm_cti_gate_channel(armv8
->cti
, 1);
1081 /* resume all other targets in the group */
1082 if (retval
== ERROR_OK
)
1083 retval
= aarch64_step_restart_smp(target
);
1084 if (retval
!= ERROR_OK
) {
1085 LOG_ERROR("Failed to restart non-stepping targets in SMP group");
1088 LOG_DEBUG("Restarted all non-stepping targets in SMP group");
1091 /* all other targets running, restore and restart the current target */
1092 retval
= aarch64_restore_one(target
, current
, &address
, 0, 0);
1093 if (retval
== ERROR_OK
)
1094 retval
= aarch64_restart_one(target
, RESTART_LAZY
);
1096 if (retval
!= ERROR_OK
)
1099 LOG_DEBUG("target step-resumed at 0x%" PRIx64
, address
);
1100 if (!handle_breakpoints
)
1101 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1103 int64_t then
= timeval_ms();
1108 retval
= aarch64_check_state_one(target
,
1109 PRSR_SDR
|PRSR_HALT
, PRSR_SDR
|PRSR_HALT
, &stepped
, &prsr
);
1110 if (retval
!= ERROR_OK
|| stepped
)
1113 if (timeval_ms() > then
+ 1000) {
1114 LOG_ERROR("timeout waiting for target %s halt after step",
1115 target_name(target
));
1116 retval
= ERROR_TARGET_TIMEOUT
;
1121 if (retval
== ERROR_TARGET_TIMEOUT
)
1122 saved_retval
= retval
;
1125 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1126 armv8
->debug_base
+ CPUV8_DBG_EDECR
, edecr
);
1127 if (retval
!= ERROR_OK
)
1130 /* restore interrupts */
1131 retval
= aarch64_set_dscr_bits(target
, 0x3 << 22, 0);
1132 if (retval
!= ERROR_OK
)
1135 if (saved_retval
!= ERROR_OK
)
1136 return saved_retval
;
1138 return aarch64_poll(target
);
1141 static int aarch64_restore_context(struct target
*target
, bool bpwp
)
1143 struct armv8_common
*armv8
= target_to_armv8(target
);
1144 struct arm
*arm
= &armv8
->arm
;
1148 LOG_DEBUG("%s", target_name(target
));
1150 if (armv8
->pre_restore_context
)
1151 armv8
->pre_restore_context(target
);
1153 retval
= armv8_dpm_write_dirty_registers(&armv8
->dpm
, bpwp
);
1154 if (retval
== ERROR_OK
) {
1155 /* registers are now invalid */
1156 register_cache_invalidate(arm
->core_cache
);
1157 register_cache_invalidate(arm
->core_cache
->next
);
1164 * Cortex-A8 Breakpoint and watchpoint functions
1167 /* Setup hardware Breakpoint Register Pair */
1168 static int aarch64_set_breakpoint(struct target
*target
,
1169 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1174 uint8_t byte_addr_select
= 0x0F;
1175 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1176 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1177 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1179 if (breakpoint
->set
) {
1180 LOG_WARNING("breakpoint already set");
1184 if (breakpoint
->type
== BKPT_HARD
) {
1186 while (brp_list
[brp_i
].used
&& (brp_i
< aarch64
->brp_num
))
1188 if (brp_i
>= aarch64
->brp_num
) {
1189 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1190 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1192 breakpoint
->set
= brp_i
+ 1;
1193 if (breakpoint
->length
== 2)
1194 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1195 control
= ((matchmode
& 0x7) << 20)
1197 | (byte_addr_select
<< 5)
1199 brp_list
[brp_i
].used
= 1;
1200 brp_list
[brp_i
].value
= breakpoint
->address
& 0xFFFFFFFFFFFFFFFC;
1201 brp_list
[brp_i
].control
= control
;
1202 bpt_value
= brp_list
[brp_i
].value
;
1204 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1205 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1206 (uint32_t)(bpt_value
& 0xFFFFFFFF));
1207 if (retval
!= ERROR_OK
)
1209 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1210 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1211 (uint32_t)(bpt_value
>> 32));
1212 if (retval
!= ERROR_OK
)
1215 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1216 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1217 brp_list
[brp_i
].control
);
1218 if (retval
!= ERROR_OK
)
1220 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1221 brp_list
[brp_i
].control
,
1222 brp_list
[brp_i
].value
);
1224 } else if (breakpoint
->type
== BKPT_SOFT
) {
1227 buf_set_u32(code
, 0, 32, armv8_opcode(armv8
, ARMV8_OPC_HLT
));
1228 retval
= target_read_memory(target
,
1229 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1230 breakpoint
->length
, 1,
1231 breakpoint
->orig_instr
);
1232 if (retval
!= ERROR_OK
)
1235 armv8_cache_d_inner_flush_virt(armv8
,
1236 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1237 breakpoint
->length
);
1239 retval
= target_write_memory(target
,
1240 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1241 breakpoint
->length
, 1, code
);
1242 if (retval
!= ERROR_OK
)
1245 armv8_cache_d_inner_flush_virt(armv8
,
1246 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1247 breakpoint
->length
);
1249 armv8_cache_i_inner_inval_virt(armv8
,
1250 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1251 breakpoint
->length
);
1253 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1256 /* Ensure that halting debug mode is enable */
1257 retval
= aarch64_set_dscr_bits(target
, DSCR_HDE
, DSCR_HDE
);
1258 if (retval
!= ERROR_OK
) {
1259 LOG_DEBUG("Failed to set DSCR.HDE");
1266 static int aarch64_set_context_breakpoint(struct target
*target
,
1267 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1269 int retval
= ERROR_FAIL
;
1272 uint8_t byte_addr_select
= 0x0F;
1273 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1274 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1275 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1277 if (breakpoint
->set
) {
1278 LOG_WARNING("breakpoint already set");
1281 /*check available context BRPs*/
1282 while ((brp_list
[brp_i
].used
||
1283 (brp_list
[brp_i
].type
!= BRP_CONTEXT
)) && (brp_i
< aarch64
->brp_num
))
1286 if (brp_i
>= aarch64
->brp_num
) {
1287 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1291 breakpoint
->set
= brp_i
+ 1;
1292 control
= ((matchmode
& 0x7) << 20)
1294 | (byte_addr_select
<< 5)
1296 brp_list
[brp_i
].used
= 1;
1297 brp_list
[brp_i
].value
= (breakpoint
->asid
);
1298 brp_list
[brp_i
].control
= control
;
1299 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1300 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1301 brp_list
[brp_i
].value
);
1302 if (retval
!= ERROR_OK
)
1304 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1305 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1306 brp_list
[brp_i
].control
);
1307 if (retval
!= ERROR_OK
)
1309 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1310 brp_list
[brp_i
].control
,
1311 brp_list
[brp_i
].value
);
1316 static int aarch64_set_hybrid_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1318 int retval
= ERROR_FAIL
;
1319 int brp_1
= 0; /* holds the contextID pair */
1320 int brp_2
= 0; /* holds the IVA pair */
1321 uint32_t control_CTX
, control_IVA
;
1322 uint8_t CTX_byte_addr_select
= 0x0F;
1323 uint8_t IVA_byte_addr_select
= 0x0F;
1324 uint8_t CTX_machmode
= 0x03;
1325 uint8_t IVA_machmode
= 0x01;
1326 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1327 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1328 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1330 if (breakpoint
->set
) {
1331 LOG_WARNING("breakpoint already set");
1334 /*check available context BRPs*/
1335 while ((brp_list
[brp_1
].used
||
1336 (brp_list
[brp_1
].type
!= BRP_CONTEXT
)) && (brp_1
< aarch64
->brp_num
))
1339 printf("brp(CTX) found num: %d\n", brp_1
);
1340 if (brp_1
>= aarch64
->brp_num
) {
1341 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1345 while ((brp_list
[brp_2
].used
||
1346 (brp_list
[brp_2
].type
!= BRP_NORMAL
)) && (brp_2
< aarch64
->brp_num
))
1349 printf("brp(IVA) found num: %d\n", brp_2
);
1350 if (brp_2
>= aarch64
->brp_num
) {
1351 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1355 breakpoint
->set
= brp_1
+ 1;
1356 breakpoint
->linked_BRP
= brp_2
;
1357 control_CTX
= ((CTX_machmode
& 0x7) << 20)
1360 | (CTX_byte_addr_select
<< 5)
1362 brp_list
[brp_1
].used
= 1;
1363 brp_list
[brp_1
].value
= (breakpoint
->asid
);
1364 brp_list
[brp_1
].control
= control_CTX
;
1365 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1366 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_1
].BRPn
,
1367 brp_list
[brp_1
].value
);
1368 if (retval
!= ERROR_OK
)
1370 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1371 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_1
].BRPn
,
1372 brp_list
[brp_1
].control
);
1373 if (retval
!= ERROR_OK
)
1376 control_IVA
= ((IVA_machmode
& 0x7) << 20)
1379 | (IVA_byte_addr_select
<< 5)
1381 brp_list
[brp_2
].used
= 1;
1382 brp_list
[brp_2
].value
= breakpoint
->address
& 0xFFFFFFFFFFFFFFFC;
1383 brp_list
[brp_2
].control
= control_IVA
;
1384 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1385 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_2
].BRPn
,
1386 brp_list
[brp_2
].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_2
].BRPn
,
1391 brp_list
[brp_2
].value
>> 32);
1392 if (retval
!= ERROR_OK
)
1394 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1395 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_2
].BRPn
,
1396 brp_list
[brp_2
].control
);
1397 if (retval
!= ERROR_OK
)
1403 static int aarch64_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1406 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1407 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
1408 struct aarch64_brp
*brp_list
= aarch64
->brp_list
;
1410 if (!breakpoint
->set
) {
1411 LOG_WARNING("breakpoint not set");
1415 if (breakpoint
->type
== BKPT_HARD
) {
1416 if ((breakpoint
->address
!= 0) && (breakpoint
->asid
!= 0)) {
1417 int brp_i
= breakpoint
->set
- 1;
1418 int brp_j
= breakpoint
->linked_BRP
;
1419 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1420 LOG_DEBUG("Invalid BRP number in breakpoint");
1423 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%" TARGET_PRIxADDR
, brp_i
,
1424 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1425 brp_list
[brp_i
].used
= 0;
1426 brp_list
[brp_i
].value
= 0;
1427 brp_list
[brp_i
].control
= 0;
1428 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1429 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1430 brp_list
[brp_i
].control
);
1431 if (retval
!= ERROR_OK
)
1433 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1434 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1435 (uint32_t)brp_list
[brp_i
].value
);
1436 if (retval
!= ERROR_OK
)
1438 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1439 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1440 (uint32_t)brp_list
[brp_i
].value
);
1441 if (retval
!= ERROR_OK
)
1443 if ((brp_j
< 0) || (brp_j
>= aarch64
->brp_num
)) {
1444 LOG_DEBUG("Invalid BRP number in breakpoint");
1447 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_j
,
1448 brp_list
[brp_j
].control
, brp_list
[brp_j
].value
);
1449 brp_list
[brp_j
].used
= 0;
1450 brp_list
[brp_j
].value
= 0;
1451 brp_list
[brp_j
].control
= 0;
1452 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1453 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_j
].BRPn
,
1454 brp_list
[brp_j
].control
);
1455 if (retval
!= ERROR_OK
)
1457 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1458 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_j
].BRPn
,
1459 (uint32_t)brp_list
[brp_j
].value
);
1460 if (retval
!= ERROR_OK
)
1462 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1463 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_j
].BRPn
,
1464 (uint32_t)brp_list
[brp_j
].value
);
1465 if (retval
!= ERROR_OK
)
1468 breakpoint
->linked_BRP
= 0;
1469 breakpoint
->set
= 0;
1473 int brp_i
= breakpoint
->set
- 1;
1474 if ((brp_i
< 0) || (brp_i
>= aarch64
->brp_num
)) {
1475 LOG_DEBUG("Invalid BRP number in breakpoint");
1478 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx64
, brp_i
,
1479 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1480 brp_list
[brp_i
].used
= 0;
1481 brp_list
[brp_i
].value
= 0;
1482 brp_list
[brp_i
].control
= 0;
1483 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1484 + CPUV8_DBG_BCR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1485 brp_list
[brp_i
].control
);
1486 if (retval
!= ERROR_OK
)
1488 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1489 + CPUV8_DBG_BVR_BASE
+ 16 * brp_list
[brp_i
].BRPn
,
1490 brp_list
[brp_i
].value
);
1491 if (retval
!= ERROR_OK
)
1494 retval
= aarch64_dap_write_memap_register_u32(target
, armv8
->debug_base
1495 + CPUV8_DBG_BVR_BASE
+ 4 + 16 * brp_list
[brp_i
].BRPn
,
1496 (uint32_t)brp_list
[brp_i
].value
);
1497 if (retval
!= ERROR_OK
)
1499 breakpoint
->set
= 0;
1503 /* restore original instruction (kept in target endianness) */
1505 armv8_cache_d_inner_flush_virt(armv8
,
1506 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1507 breakpoint
->length
);
1509 if (breakpoint
->length
== 4) {
1510 retval
= target_write_memory(target
,
1511 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1512 4, 1, breakpoint
->orig_instr
);
1513 if (retval
!= ERROR_OK
)
1516 retval
= target_write_memory(target
,
1517 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1518 2, 1, breakpoint
->orig_instr
);
1519 if (retval
!= ERROR_OK
)
1523 armv8_cache_d_inner_flush_virt(armv8
,
1524 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1525 breakpoint
->length
);
1527 armv8_cache_i_inner_inval_virt(armv8
,
1528 breakpoint
->address
& 0xFFFFFFFFFFFFFFFE,
1529 breakpoint
->length
);
1531 breakpoint
->set
= 0;
1536 static int aarch64_add_breakpoint(struct target
*target
,
1537 struct breakpoint
*breakpoint
)
1539 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1541 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1542 LOG_INFO("no hardware breakpoint available");
1543 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1546 if (breakpoint
->type
== BKPT_HARD
)
1547 aarch64
->brp_num_available
--;
1549 return aarch64_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1552 static int aarch64_add_context_breakpoint(struct target
*target
,
1553 struct breakpoint
*breakpoint
)
1555 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1557 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1558 LOG_INFO("no hardware breakpoint available");
1559 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1562 if (breakpoint
->type
== BKPT_HARD
)
1563 aarch64
->brp_num_available
--;
1565 return aarch64_set_context_breakpoint(target
, breakpoint
, 0x02); /* asid match */
1568 static int aarch64_add_hybrid_breakpoint(struct target
*target
,
1569 struct breakpoint
*breakpoint
)
1571 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1573 if ((breakpoint
->type
== BKPT_HARD
) && (aarch64
->brp_num_available
< 1)) {
1574 LOG_INFO("no hardware breakpoint available");
1575 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1578 if (breakpoint
->type
== BKPT_HARD
)
1579 aarch64
->brp_num_available
--;
1581 return aarch64_set_hybrid_breakpoint(target
, breakpoint
); /* ??? */
1585 static int aarch64_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1587 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
1590 /* It is perfectly possible to remove breakpoints while the target is running */
1591 if (target
->state
!= TARGET_HALTED
) {
1592 LOG_WARNING("target not halted");
1593 return ERROR_TARGET_NOT_HALTED
;
1597 if (breakpoint
->set
) {
1598 aarch64_unset_breakpoint(target
, breakpoint
);
1599 if (breakpoint
->type
== BKPT_HARD
)
1600 aarch64
->brp_num_available
++;
1607 * Cortex-A8 Reset functions
1610 static int aarch64_assert_reset(struct target
*target
)
1612 struct armv8_common
*armv8
= target_to_armv8(target
);
1616 /* FIXME when halt is requested, make it work somehow... */
1618 /* Issue some kind of warm reset. */
1619 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
))
1620 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1621 else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1622 /* REVISIT handle "pulls" cases, if there's
1623 * hardware that needs them to work.
1625 jtag_add_reset(0, 1);
1627 LOG_ERROR("%s: how to reset?", target_name(target
));
1631 /* registers are now invalid */
1632 if (target_was_examined(target
)) {
1633 register_cache_invalidate(armv8
->arm
.core_cache
);
1634 register_cache_invalidate(armv8
->arm
.core_cache
->next
);
1637 target
->state
= TARGET_RESET
;
1642 static int aarch64_deassert_reset(struct target
*target
)
1648 /* be certain SRST is off */
1649 jtag_add_reset(0, 0);
1651 if (!target_was_examined(target
))
1654 retval
= aarch64_poll(target
);
1655 if (retval
!= ERROR_OK
)
1658 if (target
->reset_halt
) {
1659 if (target
->state
!= TARGET_HALTED
) {
1660 LOG_WARNING("%s: ran after reset and before halt ...",
1661 target_name(target
));
1662 retval
= target_halt(target
);
1663 if (retval
!= ERROR_OK
)
1668 return aarch64_init_debug_access(target
);
1671 static int aarch64_write_apb_ap_memory(struct target
*target
,
1672 uint64_t address
, uint32_t size
,
1673 uint32_t count
, const uint8_t *buffer
)
1675 /* write memory through APB-AP */
1676 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1677 struct armv8_common
*armv8
= target_to_armv8(target
);
1678 struct arm_dpm
*dpm
= &armv8
->dpm
;
1679 struct arm
*arm
= &armv8
->arm
;
1680 int total_bytes
= count
* size
;
1682 int start_byte
= address
& 0x3;
1683 int end_byte
= (address
+ total_bytes
) & 0x3;
1686 uint8_t *tmp_buff
= NULL
;
1688 if (target
->state
!= TARGET_HALTED
) {
1689 LOG_WARNING("target not halted");
1690 return ERROR_TARGET_NOT_HALTED
;
1693 total_u32
= DIV_ROUND_UP((address
& 3) + total_bytes
, 4);
1695 /* Mark register R0 as dirty, as it will be used
1696 * for transferring the data.
1697 * It will be restored automatically when exiting
1700 reg
= armv8_reg_current(arm
, 1);
1703 reg
= armv8_reg_current(arm
, 0);
1706 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1708 /* The algorithm only copies 32 bit words, so the buffer
1709 * should be expanded to include the words at either end.
1710 * The first and last words will be read first to avoid
1711 * corruption if needed.
1713 tmp_buff
= malloc(total_u32
* 4);
1715 if ((start_byte
!= 0) && (total_u32
> 1)) {
1716 /* First bytes not aligned - read the 32 bit word to avoid corrupting
1717 * the other bytes in the word.
1719 retval
= aarch64_read_apb_ap_memory(target
, (address
& ~0x3), 4, 1, tmp_buff
);
1720 if (retval
!= ERROR_OK
)
1721 goto error_free_buff_w
;
1724 /* If end of write is not aligned, or the write is less than 4 bytes */
1725 if ((end_byte
!= 0) ||
1726 ((total_u32
== 1) && (total_bytes
!= 4))) {
1728 /* Read the last word to avoid corruption during 32 bit write */
1729 int mem_offset
= (total_u32
-1) * 4;
1730 retval
= aarch64_read_apb_ap_memory(target
, (address
& ~0x3) + mem_offset
, 4, 1, &tmp_buff
[mem_offset
]);
1731 if (retval
!= ERROR_OK
)
1732 goto error_free_buff_w
;
1735 /* Copy the write buffer over the top of the temporary buffer */
1736 memcpy(&tmp_buff
[start_byte
], buffer
, total_bytes
);
1738 /* We now have a 32 bit aligned buffer that can be written */
1741 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1742 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1743 if (retval
!= ERROR_OK
)
1744 goto error_free_buff_w
;
1746 /* Set Normal access mode */
1747 dscr
= (dscr
& ~DSCR_MA
);
1748 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1749 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1751 if (arm
->core_state
== ARM_STATE_AARCH64
) {
1752 /* Write X0 with value 'address' using write procedure */
1753 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1754 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1755 retval
= dpm
->instr_write_data_dcc_64(dpm
,
1756 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0
, 0), address
& ~0x3ULL
);
1758 /* Write R0 with value 'address' using write procedure */
1759 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
1760 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1761 dpm
->instr_write_data_dcc(dpm
,
1762 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address
& ~0x3ULL
);
1765 /* Step 1.d - Change DCC to memory mode */
1766 dscr
= dscr
| DSCR_MA
;
1767 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1768 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1769 if (retval
!= ERROR_OK
)
1770 goto error_unset_dtr_w
;
1773 /* Step 2.a - Do the write */
1774 retval
= mem_ap_write_buf_noincr(armv8
->debug_ap
,
1775 tmp_buff
, 4, total_u32
, armv8
->debug_base
+ CPUV8_DBG_DTRRX
);
1776 if (retval
!= ERROR_OK
)
1777 goto error_unset_dtr_w
;
1779 /* Step 3.a - Switch DTR mode back to Normal mode */
1780 dscr
= (dscr
& ~DSCR_MA
);
1781 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1782 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1783 if (retval
!= ERROR_OK
)
1784 goto error_unset_dtr_w
;
1786 /* Check for sticky abort flags in the DSCR */
1787 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1788 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1789 if (retval
!= ERROR_OK
)
1790 goto error_free_buff_w
;
1793 if (dscr
& (DSCR_ERR
| DSCR_SYS_ERROR_PEND
)) {
1794 /* Abort occurred - clear it and exit */
1795 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32
, dscr
);
1796 armv8_dpm_handle_exception(dpm
);
1797 goto error_free_buff_w
;
1805 /* Unset DTR mode */
1806 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1807 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1808 dscr
= (dscr
& ~DSCR_MA
);
1809 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1810 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1817 static int aarch64_read_apb_ap_memory(struct target
*target
,
1818 target_addr_t address
, uint32_t size
,
1819 uint32_t count
, uint8_t *buffer
)
1821 /* read memory through APB-AP */
1822 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1823 struct armv8_common
*armv8
= target_to_armv8(target
);
1824 struct arm_dpm
*dpm
= &armv8
->dpm
;
1825 struct arm
*arm
= &armv8
->arm
;
1826 int total_bytes
= count
* size
;
1828 int start_byte
= address
& 0x3;
1829 int end_byte
= (address
+ total_bytes
) & 0x3;
1832 uint8_t *tmp_buff
= NULL
;
1836 if (target
->state
!= TARGET_HALTED
) {
1837 LOG_WARNING("target not halted");
1838 return ERROR_TARGET_NOT_HALTED
;
1841 total_u32
= DIV_ROUND_UP((address
& 3) + total_bytes
, 4);
1842 /* Mark register X0, X1 as dirty, as it will be used
1843 * for transferring the data.
1844 * It will be restored automatically when exiting
1847 reg
= armv8_reg_current(arm
, 1);
1850 reg
= armv8_reg_current(arm
, 0);
1854 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1855 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1857 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1859 /* Set Normal access mode */
1860 dscr
= (dscr
& ~DSCR_MA
);
1861 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1862 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1864 if (arm
->core_state
== ARM_STATE_AARCH64
) {
1865 /* Write X0 with value 'address' using write procedure */
1866 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1867 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1868 retval
+= dpm
->instr_write_data_dcc_64(dpm
,
1869 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0
, 0), address
& ~0x3ULL
);
1870 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
1871 retval
+= dpm
->instr_execute(dpm
, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0
, 0));
1872 /* Step 1.e - Change DCC to memory mode */
1873 dscr
= dscr
| DSCR_MA
;
1874 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1875 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1876 /* Step 1.f - read DBGDTRTX and discard the value */
1877 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1878 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
1880 /* Write R0 with value 'address' using write procedure */
1881 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
1882 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1883 retval
+= dpm
->instr_write_data_dcc(dpm
,
1884 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address
& ~0x3ULL
);
1885 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
1886 retval
+= dpm
->instr_execute(dpm
, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
1887 /* Step 1.e - Change DCC to memory mode */
1888 dscr
= dscr
| DSCR_MA
;
1889 retval
+= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1890 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1891 /* Step 1.f - read DBGDTRTX and discard the value */
1892 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1893 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
1896 if (retval
!= ERROR_OK
)
1897 goto error_unset_dtr_r
;
1899 /* Optimize the read as much as we can, either way we read in a single pass */
1900 if ((start_byte
) || (end_byte
)) {
1901 /* The algorithm only copies 32 bit words, so the buffer
1902 * should be expanded to include the words at either end.
1903 * The first and last words will be read into a temp buffer
1904 * to avoid corruption
1906 tmp_buff
= malloc(total_u32
* 4);
1908 goto error_unset_dtr_r
;
1910 /* use the tmp buffer to read the entire data */
1911 u8buf_ptr
= tmp_buff
;
1913 /* address and read length are aligned so read directly into the passed buffer */
1916 /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
1917 * Abort flags are sticky, so can be read at end of transactions
1919 * This data is read in aligned to 32 bit boundary.
1922 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
1923 * increments X0 by 4. */
1924 retval
= mem_ap_read_buf_noincr(armv8
->debug_ap
, u8buf_ptr
, 4, total_u32
-1,
1925 armv8
->debug_base
+ CPUV8_DBG_DTRTX
);
1926 if (retval
!= ERROR_OK
)
1927 goto error_unset_dtr_r
;
1929 /* Step 3.a - set DTR access mode back to Normal mode */
1930 dscr
= (dscr
& ~DSCR_MA
);
1931 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
1932 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1933 if (retval
!= ERROR_OK
)
1934 goto error_free_buff_r
;
1936 /* Step 3.b - read DBGDTRTX for the final value */
1937 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1938 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &value
);
1939 memcpy(u8buf_ptr
+ (total_u32
-1) * 4, &value
, 4);
1941 /* Check for sticky abort flags in the DSCR */
1942 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
1943 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1944 if (retval
!= ERROR_OK
)
1945 goto error_free_buff_r
;
1949 if (dscr
& (DSCR_ERR
| DSCR_SYS_ERROR_PEND
)) {
1950 /* Abort occurred - clear it and exit */
1951 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32
, dscr
);
1952 armv8_dpm_handle_exception(dpm
);
1953 goto error_free_buff_r
;
1956 /* check if we need to copy aligned data by applying any shift necessary */
1958 memcpy(buffer
, tmp_buff
+ start_byte
, total_bytes
);
1966 /* Unset DTR mode */
1967 mem_ap_read_atomic_u32(armv8
->debug_ap
,
1968 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
1969 dscr
= (dscr
& ~DSCR_MA
);
1970 mem_ap_write_atomic_u32(armv8
->debug_ap
,
1971 armv8
->debug_base
+ CPUV8_DBG_DSCR
, dscr
);
1978 static int aarch64_read_phys_memory(struct target
*target
,
1979 target_addr_t address
, uint32_t size
,
1980 uint32_t count
, uint8_t *buffer
)
1982 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
1984 if (count
&& buffer
) {
1985 /* read memory through APB-AP */
1986 retval
= aarch64_mmu_modify(target
, 0);
1987 if (retval
!= ERROR_OK
)
1989 retval
= aarch64_read_apb_ap_memory(target
, address
, size
, count
, buffer
);
1994 static int aarch64_read_memory(struct target
*target
, target_addr_t address
,
1995 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1997 int mmu_enabled
= 0;
2000 /* determine if MMU was enabled on target stop */
2001 retval
= aarch64_mmu(target
, &mmu_enabled
);
2002 if (retval
!= ERROR_OK
)
2006 /* enable MMU as we could have disabled it for phys access */
2007 retval
= aarch64_mmu_modify(target
, 1);
2008 if (retval
!= ERROR_OK
)
2011 return aarch64_read_apb_ap_memory(target
, address
, size
, count
, buffer
);
2014 static int aarch64_write_phys_memory(struct target
*target
,
2015 target_addr_t address
, uint32_t size
,
2016 uint32_t count
, const uint8_t *buffer
)
2018 int retval
= ERROR_COMMAND_SYNTAX_ERROR
;
2020 if (count
&& buffer
) {
2021 /* write memory through APB-AP */
2022 retval
= aarch64_mmu_modify(target
, 0);
2023 if (retval
!= ERROR_OK
)
2025 return aarch64_write_apb_ap_memory(target
, address
, size
, count
, buffer
);
2031 static int aarch64_write_memory(struct target
*target
, target_addr_t address
,
2032 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
2034 int mmu_enabled
= 0;
2037 /* determine if MMU was enabled on target stop */
2038 retval
= aarch64_mmu(target
, &mmu_enabled
);
2039 if (retval
!= ERROR_OK
)
2043 /* enable MMU as we could have disabled it for phys access */
2044 retval
= aarch64_mmu_modify(target
, 1);
2045 if (retval
!= ERROR_OK
)
2048 return aarch64_write_apb_ap_memory(target
, address
, size
, count
, buffer
);
2051 static int aarch64_handle_target_request(void *priv
)
2053 struct target
*target
= priv
;
2054 struct armv8_common
*armv8
= target_to_armv8(target
);
2057 if (!target_was_examined(target
))
2059 if (!target
->dbg_msg_enabled
)
2062 if (target
->state
== TARGET_RUNNING
) {
2065 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2066 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2068 /* check if we have data */
2069 while ((dscr
& DSCR_DTR_TX_FULL
) && (retval
== ERROR_OK
)) {
2070 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2071 armv8
->debug_base
+ CPUV8_DBG_DTRTX
, &request
);
2072 if (retval
== ERROR_OK
) {
2073 target_request(target
, request
);
2074 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2075 armv8
->debug_base
+ CPUV8_DBG_DSCR
, &dscr
);
2083 static int aarch64_examine_first(struct target
*target
)
2085 struct aarch64_common
*aarch64
= target_to_aarch64(target
);
2086 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2087 struct adiv5_dap
*swjdp
= armv8
->arm
.dap
;
2090 int retval
= ERROR_OK
;
2091 uint64_t debug
, ttypr
;
2093 uint32_t tmp0
, tmp1
;
2094 debug
= ttypr
= cpuid
= 0;
2096 retval
= dap_dp_init(swjdp
);
2097 if (retval
!= ERROR_OK
)
2100 /* Search for the APB-AB - it is needed for access to debug registers */
2101 retval
= dap_find_ap(swjdp
, AP_TYPE_APB_AP
, &armv8
->debug_ap
);
2102 if (retval
!= ERROR_OK
) {
2103 LOG_ERROR("Could not find APB-AP for debug access");
2107 retval
= mem_ap_init(armv8
->debug_ap
);
2108 if (retval
!= ERROR_OK
) {
2109 LOG_ERROR("Could not initialize the APB-AP");
2113 armv8
->debug_ap
->memaccess_tck
= 10;
2115 if (!target
->dbgbase_set
) {
2117 /* Get ROM Table base */
2119 int32_t coreidx
= target
->coreid
;
2120 retval
= dap_get_debugbase(armv8
->debug_ap
, &dbgbase
, &apid
);
2121 if (retval
!= ERROR_OK
)
2123 /* Lookup 0x15 -- Processor DAP */
2124 retval
= dap_lookup_cs_component(armv8
->debug_ap
, dbgbase
, 0x15,
2125 &armv8
->debug_base
, &coreidx
);
2126 if (retval
!= ERROR_OK
)
2128 LOG_DEBUG("Detected core %" PRId32
" dbgbase: %08" PRIx32
2129 " apid: %08" PRIx32
, coreidx
, armv8
->debug_base
, apid
);
2131 armv8
->debug_base
= target
->dbgbase
;
2134 int64_t then
= timeval_ms();
2136 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2137 armv8
->debug_base
+ CPUV8_DBG_PRSR
, &prsr
);
2138 if (retval
== ERROR_OK
) {
2139 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2140 armv8
->debug_base
+ CPUV8_DBG_PRCR
, PRCR_COREPURQ
|PRCR_CORENPDRQ
);
2141 if (retval
!= ERROR_OK
) {
2142 LOG_DEBUG("write to PRCR failed");
2147 if (timeval_ms() > then
+ 1000) {
2148 retval
= ERROR_TARGET_TIMEOUT
;
2152 } while ((prsr
& PRSR_PU
) == 0);
2154 if (retval
!= ERROR_OK
) {
2155 LOG_ERROR("target %s: failed to set power state of the core.", target_name(target
));
2159 retval
= mem_ap_write_atomic_u32(armv8
->debug_ap
,
2160 armv8
->debug_base
+ CPUV8_DBG_OSLAR
, 0);
2161 if (retval
!= ERROR_OK
) {
2162 LOG_DEBUG("Examine %s failed", "oslock");
2166 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2167 armv8
->debug_base
+ CPUV8_DBG_MAINID0
, &cpuid
);
2168 if (retval
!= ERROR_OK
) {
2169 LOG_DEBUG("Examine %s failed", "CPUID");
2173 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2174 armv8
->debug_base
+ CPUV8_DBG_MEMFEATURE0
, &tmp0
);
2175 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2176 armv8
->debug_base
+ CPUV8_DBG_MEMFEATURE0
+ 4, &tmp1
);
2177 if (retval
!= ERROR_OK
) {
2178 LOG_DEBUG("Examine %s failed", "Memory Model Type");
2182 ttypr
= (ttypr
<< 32) | tmp0
;
2184 retval
= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2185 armv8
->debug_base
+ CPUV8_DBG_DBGFEATURE0
, &tmp0
);
2186 retval
+= mem_ap_read_atomic_u32(armv8
->debug_ap
,
2187 armv8
->debug_base
+ CPUV8_DBG_DBGFEATURE0
+ 4, &tmp1
);
2188 if (retval
!= ERROR_OK
) {
2189 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2193 debug
= (debug
<< 32) | tmp0
;
2195 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
2196 LOG_DEBUG("ttypr = 0x%08" PRIx64
, ttypr
);
2197 LOG_DEBUG("debug = 0x%08" PRIx64
, debug
);
2199 if (target
->ctibase
== 0) {
2200 /* assume a v8 rom table layout */
2201 cti_base
= armv8
->debug_base
+ 0x10000;
2202 LOG_INFO("Target ctibase is not set, assuming 0x%0" PRIx32
, cti_base
);
2204 cti_base
= target
->ctibase
;
2206 armv8
->cti
= arm_cti_create(armv8
->debug_ap
, cti_base
);
2207 if (armv8
->cti
== NULL
)
2210 retval
= aarch64_dpm_setup(aarch64
, debug
);
2211 if (retval
!= ERROR_OK
)
2214 /* Setup Breakpoint Register Pairs */
2215 aarch64
->brp_num
= (uint32_t)((debug
>> 12) & 0x0F) + 1;
2216 aarch64
->brp_num_context
= (uint32_t)((debug
>> 28) & 0x0F) + 1;
2217 aarch64
->brp_num_available
= aarch64
->brp_num
;
2218 aarch64
->brp_list
= calloc(aarch64
->brp_num
, sizeof(struct aarch64_brp
));
2219 for (i
= 0; i
< aarch64
->brp_num
; i
++) {
2220 aarch64
->brp_list
[i
].used
= 0;
2221 if (i
< (aarch64
->brp_num
-aarch64
->brp_num_context
))
2222 aarch64
->brp_list
[i
].type
= BRP_NORMAL
;
2224 aarch64
->brp_list
[i
].type
= BRP_CONTEXT
;
2225 aarch64
->brp_list
[i
].value
= 0;
2226 aarch64
->brp_list
[i
].control
= 0;
2227 aarch64
->brp_list
[i
].BRPn
= i
;
2230 LOG_DEBUG("Configured %i hw breakpoints", aarch64
->brp_num
);
2232 target
->state
= TARGET_RUNNING
;
2233 target
->debug_reason
= DBG_REASON_NOTHALTED
;
2235 target_set_examined(target
);
2239 static int aarch64_examine(struct target
*target
)
2241 int retval
= ERROR_OK
;
2243 /* don't re-probe hardware after each reset */
2244 if (!target_was_examined(target
))
2245 retval
= aarch64_examine_first(target
);
2247 /* Configure core debug access */
2248 if (retval
== ERROR_OK
)
2249 retval
= aarch64_init_debug_access(target
);
2255 * Cortex-A8 target creation and initialization
2258 static int aarch64_init_target(struct command_context
*cmd_ctx
,
2259 struct target
*target
)
2261 /* examine_first() does a bunch of this */
2265 static int aarch64_init_arch_info(struct target
*target
,
2266 struct aarch64_common
*aarch64
, struct jtag_tap
*tap
)
2268 struct armv8_common
*armv8
= &aarch64
->armv8_common
;
2270 /* Setup struct aarch64_common */
2271 aarch64
->common_magic
= AARCH64_COMMON_MAGIC
;
2272 /* tap has no dap initialized */
2274 tap
->dap
= dap_init();
2275 tap
->dap
->tap
= tap
;
2277 armv8
->arm
.dap
= tap
->dap
;
2279 /* register arch-specific functions */
2280 armv8
->examine_debug_reason
= NULL
;
2281 armv8
->post_debug_entry
= aarch64_post_debug_entry
;
2282 armv8
->pre_restore_context
= NULL
;
2283 armv8
->armv8_mmu
.read_physical_memory
= aarch64_read_phys_memory
;
2285 armv8_init_arch_info(target
, armv8
);
2286 target_register_timer_callback(aarch64_handle_target_request
, 1, 1, target
);
2291 static int aarch64_target_create(struct target
*target
, Jim_Interp
*interp
)
2293 struct aarch64_common
*aarch64
= calloc(1, sizeof(struct aarch64_common
));
2295 return aarch64_init_arch_info(target
, aarch64
, target
->tap
);
2298 static int aarch64_mmu(struct target
*target
, int *enabled
)
2300 if (target
->state
!= TARGET_HALTED
) {
2301 LOG_ERROR("%s: target %s not halted", __func__
, target_name(target
));
2302 return ERROR_TARGET_INVALID
;
2305 *enabled
= target_to_aarch64(target
)->armv8_common
.armv8_mmu
.mmu_enabled
;
2309 static int aarch64_virt2phys(struct target
*target
, target_addr_t virt
,
2310 target_addr_t
*phys
)
2312 return armv8_mmu_translate_va_pa(target
, virt
, phys
, 1);
2315 COMMAND_HANDLER(aarch64_handle_cache_info_command
)
2317 struct target
*target
= get_current_target(CMD_CTX
);
2318 struct armv8_common
*armv8
= target_to_armv8(target
);
2320 return armv8_handle_cache_info_command(CMD_CTX
,
2321 &armv8
->armv8_mmu
.armv8_cache
);
2325 COMMAND_HANDLER(aarch64_handle_dbginit_command
)
2327 struct target
*target
= get_current_target(CMD_CTX
);
2328 if (!target_was_examined(target
)) {
2329 LOG_ERROR("target not examined yet");
2333 return aarch64_init_debug_access(target
);
2335 COMMAND_HANDLER(aarch64_handle_smp_off_command
)
2337 struct target
*target
= get_current_target(CMD_CTX
);
2338 /* check target is an smp target */
2339 struct target_list
*head
;
2340 struct target
*curr
;
2341 head
= target
->head
;
2343 if (head
!= (struct target_list
*)NULL
) {
2344 while (head
!= (struct target_list
*)NULL
) {
2345 curr
= head
->target
;
2349 /* fixes the target display to the debugger */
2350 target
->gdb_service
->target
= target
;
2355 COMMAND_HANDLER(aarch64_handle_smp_on_command
)
2357 struct target
*target
= get_current_target(CMD_CTX
);
2358 struct target_list
*head
;
2359 struct target
*curr
;
2360 head
= target
->head
;
2361 if (head
!= (struct target_list
*)NULL
) {
2363 while (head
!= (struct target_list
*)NULL
) {
2364 curr
= head
->target
;
2372 static const struct command_registration aarch64_exec_command_handlers
[] = {
2374 .name
= "cache_info",
2375 .handler
= aarch64_handle_cache_info_command
,
2376 .mode
= COMMAND_EXEC
,
2377 .help
= "display information about target caches",
2382 .handler
= aarch64_handle_dbginit_command
,
2383 .mode
= COMMAND_EXEC
,
2384 .help
= "Initialize core debug",
2387 { .name
= "smp_off",
2388 .handler
= aarch64_handle_smp_off_command
,
2389 .mode
= COMMAND_EXEC
,
2390 .help
= "Stop smp handling",
2395 .handler
= aarch64_handle_smp_on_command
,
2396 .mode
= COMMAND_EXEC
,
2397 .help
= "Restart smp handling",
2401 COMMAND_REGISTRATION_DONE
2403 static const struct command_registration aarch64_command_handlers
[] = {
2405 .chain
= armv8_command_handlers
,
2409 .mode
= COMMAND_ANY
,
2410 .help
= "Aarch64 command group",
2412 .chain
= aarch64_exec_command_handlers
,
2414 COMMAND_REGISTRATION_DONE
2417 struct target_type aarch64_target
= {
2420 .poll
= aarch64_poll
,
2421 .arch_state
= armv8_arch_state
,
2423 .halt
= aarch64_halt
,
2424 .resume
= aarch64_resume
,
2425 .step
= aarch64_step
,
2427 .assert_reset
= aarch64_assert_reset
,
2428 .deassert_reset
= aarch64_deassert_reset
,
2430 /* REVISIT allow exporting VFP3 registers ... */
2431 .get_gdb_reg_list
= armv8_get_gdb_reg_list
,
2433 .read_memory
= aarch64_read_memory
,
2434 .write_memory
= aarch64_write_memory
,
2436 .add_breakpoint
= aarch64_add_breakpoint
,
2437 .add_context_breakpoint
= aarch64_add_context_breakpoint
,
2438 .add_hybrid_breakpoint
= aarch64_add_hybrid_breakpoint
,
2439 .remove_breakpoint
= aarch64_remove_breakpoint
,
2440 .add_watchpoint
= NULL
,
2441 .remove_watchpoint
= NULL
,
2443 .commands
= aarch64_command_handlers
,
2444 .target_create
= aarch64_target_create
,
2445 .init_target
= aarch64_init_target
,
2446 .examine
= aarch64_examine
,
2448 .read_phys_memory
= aarch64_read_phys_memory
,
2449 .write_phys_memory
= aarch64_write_phys_memory
,
2451 .virt2phys
= aarch64_virt2phys
,