1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2009 by Dirk Behme *
12 * dirk.behme@gmail.com - copy from cortex_m3 *
14 * Copyright (C) 2010 Øyvind Harboe *
15 * oyvind.harboe@zylin.com *
17 * Copyright (C) ST-Ericsson SA 2011 *
18 * michel.jaouen@stericsson.com : smp minimum support *
20 * Copyright (C) Broadcom 2012 *
21 * ehunter@broadcom.com : Cortex-R4 support *
23 * Copyright (C) 2013 Kamal Dasu *
24 * kdasu.kdev@gmail.com *
26 * This program is free software; you can redistribute it and/or modify *
27 * it under the terms of the GNU General Public License as published by *
28 * the Free Software Foundation; either version 2 of the License, or *
29 * (at your option) any later version. *
31 * This program is distributed in the hope that it will be useful, *
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
34 * GNU General Public License for more details. *
36 * You should have received a copy of the GNU General Public License *
37 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
39 * Cortex-A8(tm) TRM, ARM DDI 0344H *
40 * Cortex-A9(tm) TRM, ARM DDI 0407F *
41 * Cortex-A4(tm) TRM, ARM DDI 0363E *
42 * Cortex-A15(tm)TRM, ARM DDI 0438C *
44 ***************************************************************************/
50 #include "breakpoints.h"
53 #include "armv7a_mmu.h"
54 #include "target_request.h"
55 #include "target_type.h"
56 #include "arm_opcodes.h"
57 #include "arm_semihosting.h"
58 #include "jtag/interface.h"
59 #include "transport/transport.h"
61 #include <helper/time_support.h>
63 static int cortex_a_poll(struct target *target);
64 static int cortex_a_debug_entry(struct target *target);
65 static int cortex_a_restore_context(struct target *target, bool bpwp);
66 static int cortex_a_set_breakpoint(struct target *target,
67 struct breakpoint *breakpoint, uint8_t matchmode);
68 static int cortex_a_set_context_breakpoint(struct target *target,
69 struct breakpoint *breakpoint, uint8_t matchmode);
70 static int cortex_a_set_hybrid_breakpoint(struct target *target,
71 struct breakpoint *breakpoint);
72 static int cortex_a_unset_breakpoint(struct target *target,
73 struct breakpoint *breakpoint);
74 static int cortex_a_wait_dscr_bits(struct target *target, uint32_t mask,
75 uint32_t value, uint32_t *dscr);
76 static int cortex_a_mmu(struct target *target, int *enabled);
77 static int cortex_a_mmu_modify(struct target *target, int enable);
78 static int cortex_a_virt2phys(struct target *target,
79 target_addr_t virt, target_addr_t *phys);
80 static int cortex_a_read_cpu_memory(struct target *target,
81 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
84 /* restore cp15_control_reg at resume */
85 static int cortex_a_restore_cp15_control_reg(struct target *target)
87 int retval = ERROR_OK;
88 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
89 struct armv7a_common *armv7a = target_to_armv7a(target);
91 if (cortex_a->cp15_control_reg != cortex_a->cp15_control_reg_curr) {
92 cortex_a->cp15_control_reg_curr = cortex_a->cp15_control_reg;
93 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_a->cp15_control_reg); */
94 retval = armv7a->arm.mcr(target, 15,
97 cortex_a->cp15_control_reg);
103 * Set up ARM core for memory access.
104 * If !phys_access, switch to SVC mode and make sure MMU is on
105 * If phys_access, switch off mmu
107 static int cortex_a_prep_memaccess(struct target *target, int phys_access)
109 struct armv7a_common *armv7a = target_to_armv7a(target);
110 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
113 if (phys_access == 0) {
114 arm_dpm_modeswitch(&armv7a->dpm, ARM_MODE_SVC);
115 cortex_a_mmu(target, &mmu_enabled);
117 cortex_a_mmu_modify(target, 1);
118 if (cortex_a->dacrfixup_mode == CORTEX_A_DACRFIXUP_ON) {
119 /* overwrite DACR to all-manager */
120 armv7a->arm.mcr(target, 15,
125 cortex_a_mmu(target, &mmu_enabled);
127 cortex_a_mmu_modify(target, 0);
133 * Restore ARM core after memory access.
134 * If !phys_access, switch to previous mode
135 * If phys_access, restore MMU setting
137 static int cortex_a_post_memaccess(struct target *target, int phys_access)
139 struct armv7a_common *armv7a = target_to_armv7a(target);
140 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
142 if (phys_access == 0) {
143 if (cortex_a->dacrfixup_mode == CORTEX_A_DACRFIXUP_ON) {
145 armv7a->arm.mcr(target, 15,
147 cortex_a->cp15_dacr_reg);
149 arm_dpm_modeswitch(&armv7a->dpm, ARM_MODE_ANY);
152 cortex_a_mmu(target, &mmu_enabled);
154 cortex_a_mmu_modify(target, 1);
160 /* modify cp15_control_reg in order to enable or disable mmu for :
161 * - virt2phys address conversion
162 * - read or write memory in phys or virt address */
163 static int cortex_a_mmu_modify(struct target *target, int enable)
165 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
166 struct armv7a_common *armv7a = target_to_armv7a(target);
167 int retval = ERROR_OK;
171 /* if mmu enabled at target stop and mmu not enable */
172 if (!(cortex_a->cp15_control_reg & 0x1U)) {
173 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
176 if ((cortex_a->cp15_control_reg_curr & 0x1U) == 0) {
177 cortex_a->cp15_control_reg_curr |= 0x1U;
181 if ((cortex_a->cp15_control_reg_curr & 0x1U) == 0x1U) {
182 cortex_a->cp15_control_reg_curr &= ~0x1U;
188 LOG_DEBUG("%s, writing cp15 ctrl: %" PRIx32,
189 enable ? "enable mmu" : "disable mmu",
190 cortex_a->cp15_control_reg_curr);
192 retval = armv7a->arm.mcr(target, 15,
195 cortex_a->cp15_control_reg_curr);
201 * Cortex-A Basic debug access, very low level assumes state is saved
203 static int cortex_a_init_debug_access(struct target *target)
205 struct armv7a_common *armv7a = target_to_armv7a(target);
209 /* lock memory-mapped access to debug registers to prevent
210 * software interference */
211 retval = mem_ap_write_u32(armv7a->debug_ap,
212 armv7a->debug_base + CPUDBG_LOCKACCESS, 0);
213 if (retval != ERROR_OK)
216 /* Disable cacheline fills and force cache write-through in debug state */
217 retval = mem_ap_write_u32(armv7a->debug_ap,
218 armv7a->debug_base + CPUDBG_DSCCR, 0);
219 if (retval != ERROR_OK)
222 /* Disable TLB lookup and refill/eviction in debug state */
223 retval = mem_ap_write_u32(armv7a->debug_ap,
224 armv7a->debug_base + CPUDBG_DSMCR, 0);
225 if (retval != ERROR_OK)
228 retval = dap_run(armv7a->debug_ap->dap);
229 if (retval != ERROR_OK)
232 /* Enabling of instruction execution in debug mode is done in debug_entry code */
234 /* Resync breakpoint registers */
236 /* Enable halt for breakpoint, watchpoint and vector catch */
237 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
238 armv7a->debug_base + CPUDBG_DSCR, &dscr);
239 if (retval != ERROR_OK)
241 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
242 armv7a->debug_base + CPUDBG_DSCR, dscr | DSCR_HALT_DBG_MODE);
243 if (retval != ERROR_OK)
246 /* Since this is likely called from init or reset, update target state information*/
247 return cortex_a_poll(target);
250 static int cortex_a_wait_instrcmpl(struct target *target, uint32_t *dscr, bool force)
252 /* Waits until InstrCmpl_l becomes 1, indicating instruction is done.
253 * Writes final value of DSCR into *dscr. Pass force to force always
254 * reading DSCR at least once. */
255 struct armv7a_common *armv7a = target_to_armv7a(target);
259 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
260 armv7a->debug_base + CPUDBG_DSCR, dscr);
261 if (retval != ERROR_OK) {
262 LOG_ERROR("Could not read DSCR register");
267 retval = cortex_a_wait_dscr_bits(target, DSCR_INSTR_COMP, DSCR_INSTR_COMP, dscr);
268 if (retval != ERROR_OK)
269 LOG_ERROR("Error waiting for InstrCompl=1");
273 /* To reduce needless round-trips, pass in a pointer to the current
274 * DSCR value. Initialize it to zero if you just need to know the
275 * value on return from this function; or DSCR_INSTR_COMP if you
276 * happen to know that no instruction is pending.
278 static int cortex_a_exec_opcode(struct target *target,
279 uint32_t opcode, uint32_t *dscr_p)
283 struct armv7a_common *armv7a = target_to_armv7a(target);
285 dscr = dscr_p ? *dscr_p : 0;
287 LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
289 /* Wait for InstrCompl bit to be set */
290 retval = cortex_a_wait_instrcmpl(target, dscr_p, false);
291 if (retval != ERROR_OK)
294 retval = mem_ap_write_u32(armv7a->debug_ap,
295 armv7a->debug_base + CPUDBG_ITR, opcode);
296 if (retval != ERROR_OK)
299 /* Wait for InstrCompl bit to be set */
300 retval = cortex_a_wait_instrcmpl(target, &dscr, true);
301 if (retval != ERROR_OK) {
302 LOG_ERROR("Error waiting for cortex_a_exec_opcode");
312 /* Write to memory mapped registers directly with no cache or mmu handling */
313 static int cortex_a_dap_write_memap_register_u32(struct target *target,
318 struct armv7a_common *armv7a = target_to_armv7a(target);
320 retval = mem_ap_write_atomic_u32(armv7a->debug_ap, address, value);
326 * Cortex-A implementation of Debug Programmer's Model
328 * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
329 * so there's no need to poll for it before executing an instruction.
331 * NOTE that in several of these cases the "stall" mode might be useful.
332 * It'd let us queue a few operations together... prepare/finish might
333 * be the places to enable/disable that mode.
336 static inline struct cortex_a_common *dpm_to_a(struct arm_dpm *dpm)
338 return container_of(dpm, struct cortex_a_common, armv7a_common.dpm);
341 static int cortex_a_write_dcc(struct cortex_a_common *a, uint32_t data)
343 LOG_DEBUG("write DCC 0x%08" PRIx32, data);
344 return mem_ap_write_u32(a->armv7a_common.debug_ap,
345 a->armv7a_common.debug_base + CPUDBG_DTRRX, data);
348 static int cortex_a_read_dcc(struct cortex_a_common *a, uint32_t *data,
351 uint32_t dscr = DSCR_INSTR_COMP;
357 /* Wait for DTRRXfull */
358 retval = cortex_a_wait_dscr_bits(a->armv7a_common.arm.target,
359 DSCR_DTR_TX_FULL, DSCR_DTR_TX_FULL, &dscr);
360 if (retval != ERROR_OK) {
361 LOG_ERROR("Error waiting for read dcc");
365 retval = mem_ap_read_atomic_u32(a->armv7a_common.debug_ap,
366 a->armv7a_common.debug_base + CPUDBG_DTRTX, data);
367 if (retval != ERROR_OK)
369 /* LOG_DEBUG("read DCC 0x%08" PRIx32, *data); */
377 static int cortex_a_dpm_prepare(struct arm_dpm *dpm)
379 struct cortex_a_common *a = dpm_to_a(dpm);
383 /* set up invariant: INSTR_COMP is set after ever DPM operation */
384 retval = cortex_a_wait_instrcmpl(dpm->arm->target, &dscr, true);
385 if (retval != ERROR_OK) {
386 LOG_ERROR("Error waiting for dpm prepare");
390 /* this "should never happen" ... */
391 if (dscr & DSCR_DTR_RX_FULL) {
392 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
394 retval = cortex_a_exec_opcode(
395 a->armv7a_common.arm.target,
396 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
398 if (retval != ERROR_OK)
405 static int cortex_a_dpm_finish(struct arm_dpm *dpm)
407 /* REVISIT what could be done here? */
411 static int cortex_a_instr_write_data_dcc(struct arm_dpm *dpm,
412 uint32_t opcode, uint32_t data)
414 struct cortex_a_common *a = dpm_to_a(dpm);
416 uint32_t dscr = DSCR_INSTR_COMP;
418 retval = cortex_a_write_dcc(a, data);
419 if (retval != ERROR_OK)
422 return cortex_a_exec_opcode(
423 a->armv7a_common.arm.target,
428 static int cortex_a_instr_write_data_r0(struct arm_dpm *dpm,
429 uint32_t opcode, uint32_t data)
431 struct cortex_a_common *a = dpm_to_a(dpm);
432 uint32_t dscr = DSCR_INSTR_COMP;
435 retval = cortex_a_write_dcc(a, data);
436 if (retval != ERROR_OK)
439 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
440 retval = cortex_a_exec_opcode(
441 a->armv7a_common.arm.target,
442 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
444 if (retval != ERROR_OK)
447 /* then the opcode, taking data from R0 */
448 retval = cortex_a_exec_opcode(
449 a->armv7a_common.arm.target,
456 static int cortex_a_instr_cpsr_sync(struct arm_dpm *dpm)
458 struct target *target = dpm->arm->target;
459 uint32_t dscr = DSCR_INSTR_COMP;
461 /* "Prefetch flush" after modifying execution status in CPSR */
462 return cortex_a_exec_opcode(target,
463 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
467 static int cortex_a_instr_read_data_dcc(struct arm_dpm *dpm,
468 uint32_t opcode, uint32_t *data)
470 struct cortex_a_common *a = dpm_to_a(dpm);
472 uint32_t dscr = DSCR_INSTR_COMP;
474 /* the opcode, writing data to DCC */
475 retval = cortex_a_exec_opcode(
476 a->armv7a_common.arm.target,
479 if (retval != ERROR_OK)
482 return cortex_a_read_dcc(a, data, &dscr);
486 static int cortex_a_instr_read_data_r0(struct arm_dpm *dpm,
487 uint32_t opcode, uint32_t *data)
489 struct cortex_a_common *a = dpm_to_a(dpm);
490 uint32_t dscr = DSCR_INSTR_COMP;
493 /* the opcode, writing data to R0 */
494 retval = cortex_a_exec_opcode(
495 a->armv7a_common.arm.target,
498 if (retval != ERROR_OK)
501 /* write R0 to DCC */
502 retval = cortex_a_exec_opcode(
503 a->armv7a_common.arm.target,
504 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
506 if (retval != ERROR_OK)
509 return cortex_a_read_dcc(a, data, &dscr);
512 static int cortex_a_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
513 uint32_t addr, uint32_t control)
515 struct cortex_a_common *a = dpm_to_a(dpm);
516 uint32_t vr = a->armv7a_common.debug_base;
517 uint32_t cr = a->armv7a_common.debug_base;
521 case 0 ... 15: /* breakpoints */
522 vr += CPUDBG_BVR_BASE;
523 cr += CPUDBG_BCR_BASE;
525 case 16 ... 31: /* watchpoints */
526 vr += CPUDBG_WVR_BASE;
527 cr += CPUDBG_WCR_BASE;
536 LOG_DEBUG("A: bpwp enable, vr %08x cr %08x",
537 (unsigned) vr, (unsigned) cr);
539 retval = cortex_a_dap_write_memap_register_u32(dpm->arm->target,
541 if (retval != ERROR_OK)
543 retval = cortex_a_dap_write_memap_register_u32(dpm->arm->target,
548 static int cortex_a_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
550 struct cortex_a_common *a = dpm_to_a(dpm);
555 cr = a->armv7a_common.debug_base + CPUDBG_BCR_BASE;
558 cr = a->armv7a_common.debug_base + CPUDBG_WCR_BASE;
566 LOG_DEBUG("A: bpwp disable, cr %08x", (unsigned) cr);
568 /* clear control register */
569 return cortex_a_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
572 static int cortex_a_dpm_setup(struct cortex_a_common *a, uint32_t didr)
574 struct arm_dpm *dpm = &a->armv7a_common.dpm;
577 dpm->arm = &a->armv7a_common.arm;
580 dpm->prepare = cortex_a_dpm_prepare;
581 dpm->finish = cortex_a_dpm_finish;
583 dpm->instr_write_data_dcc = cortex_a_instr_write_data_dcc;
584 dpm->instr_write_data_r0 = cortex_a_instr_write_data_r0;
585 dpm->instr_cpsr_sync = cortex_a_instr_cpsr_sync;
587 dpm->instr_read_data_dcc = cortex_a_instr_read_data_dcc;
588 dpm->instr_read_data_r0 = cortex_a_instr_read_data_r0;
590 dpm->bpwp_enable = cortex_a_bpwp_enable;
591 dpm->bpwp_disable = cortex_a_bpwp_disable;
593 retval = arm_dpm_setup(dpm);
594 if (retval == ERROR_OK)
595 retval = arm_dpm_initialize(dpm);
599 static struct target *get_cortex_a(struct target *target, int32_t coreid)
601 struct target_list *head;
605 while (head != (struct target_list *)NULL) {
607 if ((curr->coreid == coreid) && (curr->state == TARGET_HALTED))
613 static int cortex_a_halt(struct target *target);
615 static int cortex_a_halt_smp(struct target *target)
618 struct target_list *head;
621 while (head != (struct target_list *)NULL) {
623 if ((curr != target) && (curr->state != TARGET_HALTED)
624 && target_was_examined(curr))
625 retval += cortex_a_halt(curr);
631 static int update_halt_gdb(struct target *target)
633 struct target *gdb_target = NULL;
634 struct target_list *head;
638 if (target->gdb_service && target->gdb_service->core[0] == -1) {
639 target->gdb_service->target = target;
640 target->gdb_service->core[0] = target->coreid;
641 retval += cortex_a_halt_smp(target);
644 if (target->gdb_service)
645 gdb_target = target->gdb_service->target;
647 foreach_smp_target(head, target->head) {
649 /* skip calling context */
652 if (!target_was_examined(curr))
654 /* skip targets that were already halted */
655 if (curr->state == TARGET_HALTED)
657 /* Skip gdb_target; it alerts GDB so has to be polled as last one */
658 if (curr == gdb_target)
661 /* avoid recursion in cortex_a_poll() */
667 /* after all targets were updated, poll the gdb serving target */
668 if (gdb_target != NULL && gdb_target != target)
669 cortex_a_poll(gdb_target);
674 * Cortex-A Run control
677 static int cortex_a_poll(struct target *target)
679 int retval = ERROR_OK;
681 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
682 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
683 enum target_state prev_target_state = target->state;
684 /* toggle to another core is done by gdb as follow */
685 /* maint packet J core_id */
687 /* the next polling trigger an halt event sent to gdb */
688 if ((target->state == TARGET_HALTED) && (target->smp) &&
689 (target->gdb_service) &&
690 (target->gdb_service->target == NULL)) {
691 target->gdb_service->target =
692 get_cortex_a(target, target->gdb_service->core[1]);
693 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
696 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
697 armv7a->debug_base + CPUDBG_DSCR, &dscr);
698 if (retval != ERROR_OK)
700 cortex_a->cpudbg_dscr = dscr;
702 if (DSCR_RUN_MODE(dscr) == (DSCR_CORE_HALTED | DSCR_CORE_RESTARTED)) {
703 if (prev_target_state != TARGET_HALTED) {
704 /* We have a halting debug event */
705 LOG_DEBUG("Target halted");
706 target->state = TARGET_HALTED;
708 retval = cortex_a_debug_entry(target);
709 if (retval != ERROR_OK)
713 retval = update_halt_gdb(target);
714 if (retval != ERROR_OK)
718 if (prev_target_state == TARGET_DEBUG_RUNNING) {
719 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
720 } else { /* prev_target_state is RUNNING, UNKNOWN or RESET */
721 if (arm_semihosting(target, &retval) != 0)
724 target_call_event_callbacks(target,
725 TARGET_EVENT_HALTED);
729 target->state = TARGET_RUNNING;
734 static int cortex_a_halt(struct target *target)
738 struct armv7a_common *armv7a = target_to_armv7a(target);
741 * Tell the core to be halted by writing DRCR with 0x1
742 * and then wait for the core to be halted.
744 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
745 armv7a->debug_base + CPUDBG_DRCR, DRCR_HALT);
746 if (retval != ERROR_OK)
749 dscr = 0; /* force read of dscr */
750 retval = cortex_a_wait_dscr_bits(target, DSCR_CORE_HALTED,
751 DSCR_CORE_HALTED, &dscr);
752 if (retval != ERROR_OK) {
753 LOG_ERROR("Error waiting for halt");
757 target->debug_reason = DBG_REASON_DBGRQ;
762 static int cortex_a_internal_restore(struct target *target, int current,
763 target_addr_t *address, int handle_breakpoints, int debug_execution)
765 struct armv7a_common *armv7a = target_to_armv7a(target);
766 struct arm *arm = &armv7a->arm;
770 if (!debug_execution)
771 target_free_all_working_areas(target);
774 if (debug_execution) {
775 /* Disable interrupts */
776 /* We disable interrupts in the PRIMASK register instead of
777 * masking with C_MASKINTS,
778 * This is probably the same issue as Cortex-M3 Errata 377493:
779 * C_MASKINTS in parallel with disabled interrupts can cause
780 * local faults to not be taken. */
781 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_PRIMASK].value, 0, 32, 1);
782 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].dirty = true;
783 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].valid = true;
785 /* Make sure we are in Thumb mode */
786 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32,
787 buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0,
789 armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = true;
790 armv7m->core_cache->reg_list[ARMV7M_xPSR].valid = true;
794 /* current = 1: continue on current pc, otherwise continue at <address> */
795 resume_pc = buf_get_u32(arm->pc->value, 0, 32);
797 resume_pc = *address;
799 *address = resume_pc;
801 /* Make sure that the Armv7 gdb thumb fixups does not
802 * kill the return address
804 switch (arm->core_state) {
806 resume_pc &= 0xFFFFFFFC;
808 case ARM_STATE_THUMB:
809 case ARM_STATE_THUMB_EE:
810 /* When the return address is loaded into PC
811 * bit 0 must be 1 to stay in Thumb state
815 case ARM_STATE_JAZELLE:
816 LOG_ERROR("How do I resume into Jazelle state??");
818 case ARM_STATE_AARCH64:
819 LOG_ERROR("Shoudn't be in AARCH64 state");
822 LOG_DEBUG("resume pc = 0x%08" PRIx32, resume_pc);
823 buf_set_u32(arm->pc->value, 0, 32, resume_pc);
824 arm->pc->dirty = true;
825 arm->pc->valid = true;
827 /* restore dpm_mode at system halt */
828 arm_dpm_modeswitch(&armv7a->dpm, ARM_MODE_ANY);
829 /* called it now before restoring context because it uses cpu
830 * register r0 for restoring cp15 control register */
831 retval = cortex_a_restore_cp15_control_reg(target);
832 if (retval != ERROR_OK)
834 retval = cortex_a_restore_context(target, handle_breakpoints);
835 if (retval != ERROR_OK)
837 target->debug_reason = DBG_REASON_NOTHALTED;
838 target->state = TARGET_RUNNING;
840 /* registers are now invalid */
841 register_cache_invalidate(arm->core_cache);
844 /* the front-end may request us not to handle breakpoints */
845 if (handle_breakpoints) {
846 /* Single step past breakpoint at current address */
847 breakpoint = breakpoint_find(target, resume_pc);
849 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
850 cortex_m3_unset_breakpoint(target, breakpoint);
851 cortex_m3_single_step_core(target);
852 cortex_m3_set_breakpoint(target, breakpoint);
860 static int cortex_a_internal_restart(struct target *target)
862 struct armv7a_common *armv7a = target_to_armv7a(target);
863 struct arm *arm = &armv7a->arm;
867 * * Restart core and wait for it to be started. Clear ITRen and sticky
868 * * exception flags: see ARMv7 ARM, C5.9.
870 * REVISIT: for single stepping, we probably want to
871 * disable IRQs by default, with optional override...
874 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
875 armv7a->debug_base + CPUDBG_DSCR, &dscr);
876 if (retval != ERROR_OK)
879 if ((dscr & DSCR_INSTR_COMP) == 0)
880 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
882 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
883 armv7a->debug_base + CPUDBG_DSCR, dscr & ~DSCR_ITR_EN);
884 if (retval != ERROR_OK)
887 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
888 armv7a->debug_base + CPUDBG_DRCR, DRCR_RESTART |
889 DRCR_CLEAR_EXCEPTIONS);
890 if (retval != ERROR_OK)
893 dscr = 0; /* force read of dscr */
894 retval = cortex_a_wait_dscr_bits(target, DSCR_CORE_RESTARTED,
895 DSCR_CORE_RESTARTED, &dscr);
896 if (retval != ERROR_OK) {
897 LOG_ERROR("Error waiting for resume");
901 target->debug_reason = DBG_REASON_NOTHALTED;
902 target->state = TARGET_RUNNING;
904 /* registers are now invalid */
905 register_cache_invalidate(arm->core_cache);
910 static int cortex_a_restore_smp(struct target *target, int handle_breakpoints)
913 struct target_list *head;
915 target_addr_t address;
917 while (head != (struct target_list *)NULL) {
919 if ((curr != target) && (curr->state != TARGET_RUNNING)
920 && target_was_examined(curr)) {
921 /* resume current address , not in step mode */
922 retval += cortex_a_internal_restore(curr, 1, &address,
923 handle_breakpoints, 0);
924 retval += cortex_a_internal_restart(curr);
932 static int cortex_a_resume(struct target *target, int current,
933 target_addr_t address, int handle_breakpoints, int debug_execution)
936 /* dummy resume for smp toggle in order to reduce gdb impact */
937 if ((target->smp) && (target->gdb_service->core[1] != -1)) {
938 /* simulate a start and halt of target */
939 target->gdb_service->target = NULL;
940 target->gdb_service->core[0] = target->gdb_service->core[1];
941 /* fake resume at next poll we play the target core[1], see poll*/
942 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
945 cortex_a_internal_restore(target, current, &address, handle_breakpoints, debug_execution);
947 target->gdb_service->core[0] = -1;
948 retval = cortex_a_restore_smp(target, handle_breakpoints);
949 if (retval != ERROR_OK)
952 cortex_a_internal_restart(target);
954 if (!debug_execution) {
955 target->state = TARGET_RUNNING;
956 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
957 LOG_DEBUG("target resumed at " TARGET_ADDR_FMT, address);
959 target->state = TARGET_DEBUG_RUNNING;
960 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
961 LOG_DEBUG("target debug resumed at " TARGET_ADDR_FMT, address);
967 static int cortex_a_debug_entry(struct target *target)
970 int retval = ERROR_OK;
971 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
972 struct armv7a_common *armv7a = target_to_armv7a(target);
973 struct arm *arm = &armv7a->arm;
975 LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a->cpudbg_dscr);
977 /* REVISIT surely we should not re-read DSCR !! */
978 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
979 armv7a->debug_base + CPUDBG_DSCR, &dscr);
980 if (retval != ERROR_OK)
983 /* REVISIT see A TRM 12.11.4 steps 2..3 -- make sure that any
984 * imprecise data aborts get discarded by issuing a Data
985 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
988 /* Enable the ITR execution once we are in debug mode */
990 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
991 armv7a->debug_base + CPUDBG_DSCR, dscr);
992 if (retval != ERROR_OK)
995 /* Examine debug reason */
996 arm_dpm_report_dscr(&armv7a->dpm, cortex_a->cpudbg_dscr);
998 /* save address of instruction that triggered the watchpoint? */
999 if (target->debug_reason == DBG_REASON_WATCHPOINT) {
1002 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
1003 armv7a->debug_base + CPUDBG_WFAR,
1005 if (retval != ERROR_OK)
1007 arm_dpm_report_wfar(&armv7a->dpm, wfar);
1010 /* First load register accessible through core debug port */
1011 retval = arm_dpm_read_current_registers(&armv7a->dpm);
1012 if (retval != ERROR_OK)
1017 retval = arm_dpm_read_reg(&armv7a->dpm, arm->spsr, 17);
1018 if (retval != ERROR_OK)
1023 /* TODO, Move this */
1024 uint32_t cp15_control_register, cp15_cacr, cp15_nacr;
1025 cortex_a_read_cp(target, &cp15_control_register, 15, 0, 1, 0, 0);
1026 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register);
1028 cortex_a_read_cp(target, &cp15_cacr, 15, 0, 1, 0, 2);
1029 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr);
1031 cortex_a_read_cp(target, &cp15_nacr, 15, 0, 1, 1, 2);
1032 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr);
1035 /* Are we in an exception handler */
1036 /* armv4_5->exception_number = 0; */
1037 if (armv7a->post_debug_entry) {
1038 retval = armv7a->post_debug_entry(target);
1039 if (retval != ERROR_OK)
1046 static int cortex_a_post_debug_entry(struct target *target)
1048 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1049 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
1052 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1053 retval = armv7a->arm.mrc(target, 15,
1054 0, 0, /* op1, op2 */
1055 1, 0, /* CRn, CRm */
1056 &cortex_a->cp15_control_reg);
1057 if (retval != ERROR_OK)
1059 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32, cortex_a->cp15_control_reg);
1060 cortex_a->cp15_control_reg_curr = cortex_a->cp15_control_reg;
1062 if (!armv7a->is_armv7r)
1063 armv7a_read_ttbcr(target);
1065 if (armv7a->armv7a_mmu.armv7a_cache.info == -1)
1066 armv7a_identify_cache(target);
1068 if (armv7a->is_armv7r) {
1069 armv7a->armv7a_mmu.mmu_enabled = 0;
1071 armv7a->armv7a_mmu.mmu_enabled =
1072 (cortex_a->cp15_control_reg & 0x1U) ? 1 : 0;
1074 armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled =
1075 (cortex_a->cp15_control_reg & 0x4U) ? 1 : 0;
1076 armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled =
1077 (cortex_a->cp15_control_reg & 0x1000U) ? 1 : 0;
1078 cortex_a->curr_mode = armv7a->arm.core_mode;
1080 /* switch to SVC mode to read DACR */
1081 arm_dpm_modeswitch(&armv7a->dpm, ARM_MODE_SVC);
1082 armv7a->arm.mrc(target, 15,
1084 &cortex_a->cp15_dacr_reg);
1086 LOG_DEBUG("cp15_dacr_reg: %8.8" PRIx32,
1087 cortex_a->cp15_dacr_reg);
1089 arm_dpm_modeswitch(&armv7a->dpm, ARM_MODE_ANY);
1093 int cortex_a_set_dscr_bits(struct target *target, unsigned long bit_mask, unsigned long value)
1095 struct armv7a_common *armv7a = target_to_armv7a(target);
1099 int retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
1100 armv7a->debug_base + CPUDBG_DSCR, &dscr);
1101 if (ERROR_OK != retval)
1104 /* clear bitfield */
1107 dscr |= value & bit_mask;
1109 /* write new DSCR */
1110 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
1111 armv7a->debug_base + CPUDBG_DSCR, dscr);
1115 static int cortex_a_step(struct target *target, int current, target_addr_t address,
1116 int handle_breakpoints)
1118 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1119 struct armv7a_common *armv7a = target_to_armv7a(target);
1120 struct arm *arm = &armv7a->arm;
1121 struct breakpoint *breakpoint = NULL;
1122 struct breakpoint stepbreakpoint;
1126 if (target->state != TARGET_HALTED) {
1127 LOG_WARNING("target not halted");
1128 return ERROR_TARGET_NOT_HALTED;
1131 /* current = 1: continue on current pc, otherwise continue at <address> */
1134 buf_set_u32(r->value, 0, 32, address);
1136 address = buf_get_u32(r->value, 0, 32);
1138 /* The front-end may request us not to handle breakpoints.
1139 * But since Cortex-A uses breakpoint for single step,
1140 * we MUST handle breakpoints.
1142 handle_breakpoints = 1;
1143 if (handle_breakpoints) {
1144 breakpoint = breakpoint_find(target, address);
1146 cortex_a_unset_breakpoint(target, breakpoint);
1149 /* Setup single step breakpoint */
1150 stepbreakpoint.address = address;
1151 stepbreakpoint.asid = 0;
1152 stepbreakpoint.length = (arm->core_state == ARM_STATE_THUMB)
1154 stepbreakpoint.type = BKPT_HARD;
1155 stepbreakpoint.set = 0;
1157 /* Disable interrupts during single step if requested */
1158 if (cortex_a->isrmasking_mode == CORTEX_A_ISRMASK_ON) {
1159 retval = cortex_a_set_dscr_bits(target, DSCR_INT_DIS, DSCR_INT_DIS);
1160 if (ERROR_OK != retval)
1164 /* Break on IVA mismatch */
1165 cortex_a_set_breakpoint(target, &stepbreakpoint, 0x04);
1167 target->debug_reason = DBG_REASON_SINGLESTEP;
1169 retval = cortex_a_resume(target, 1, address, 0, 0);
1170 if (retval != ERROR_OK)
1173 int64_t then = timeval_ms();
1174 while (target->state != TARGET_HALTED) {
1175 retval = cortex_a_poll(target);
1176 if (retval != ERROR_OK)
1178 if (target->state == TARGET_HALTED)
1180 if (timeval_ms() > then + 1000) {
1181 LOG_ERROR("timeout waiting for target halt");
1186 cortex_a_unset_breakpoint(target, &stepbreakpoint);
1188 /* Re-enable interrupts if they were disabled */
1189 if (cortex_a->isrmasking_mode == CORTEX_A_ISRMASK_ON) {
1190 retval = cortex_a_set_dscr_bits(target, DSCR_INT_DIS, 0);
1191 if (ERROR_OK != retval)
1196 target->debug_reason = DBG_REASON_BREAKPOINT;
1199 cortex_a_set_breakpoint(target, breakpoint, 0);
1201 if (target->state != TARGET_HALTED)
1202 LOG_DEBUG("target stepped");
1207 static int cortex_a_restore_context(struct target *target, bool bpwp)
1209 struct armv7a_common *armv7a = target_to_armv7a(target);
1213 if (armv7a->pre_restore_context)
1214 armv7a->pre_restore_context(target);
1216 return arm_dpm_write_dirty_registers(&armv7a->dpm, bpwp);
1220 * Cortex-A Breakpoint and watchpoint functions
1223 /* Setup hardware Breakpoint Register Pair */
1224 static int cortex_a_set_breakpoint(struct target *target,
1225 struct breakpoint *breakpoint, uint8_t matchmode)
1230 uint8_t byte_addr_select = 0x0F;
1231 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1232 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
1233 struct cortex_a_brp *brp_list = cortex_a->brp_list;
1235 if (breakpoint->set) {
1236 LOG_WARNING("breakpoint already set");
1240 if (breakpoint->type == BKPT_HARD) {
1241 while (brp_list[brp_i].used && (brp_i < cortex_a->brp_num))
1243 if (brp_i >= cortex_a->brp_num) {
1244 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1245 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1247 breakpoint->set = brp_i + 1;
1248 if (breakpoint->length == 2)
1249 byte_addr_select = (3 << (breakpoint->address & 0x02));
1250 control = ((matchmode & 0x7) << 20)
1251 | (byte_addr_select << 5)
1253 brp_list[brp_i].used = 1;
1254 brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
1255 brp_list[brp_i].control = control;
1256 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1257 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1258 brp_list[brp_i].value);
1259 if (retval != ERROR_OK)
1261 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1262 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1263 brp_list[brp_i].control);
1264 if (retval != ERROR_OK)
1266 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1267 brp_list[brp_i].control,
1268 brp_list[brp_i].value);
1269 } else if (breakpoint->type == BKPT_SOFT) {
1271 /* length == 2: Thumb breakpoint */
1272 if (breakpoint->length == 2)
1273 buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11));
1275 /* length == 3: Thumb-2 breakpoint, actual encoding is
1276 * a regular Thumb BKPT instruction but we replace a
1277 * 32bit Thumb-2 instruction, so fix-up the breakpoint
1280 if (breakpoint->length == 3) {
1281 buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11));
1282 breakpoint->length = 4;
1284 /* length == 4, normal ARM breakpoint */
1285 buf_set_u32(code, 0, 32, ARMV5_BKPT(0x11));
1287 retval = target_read_memory(target,
1288 breakpoint->address & 0xFFFFFFFE,
1289 breakpoint->length, 1,
1290 breakpoint->orig_instr);
1291 if (retval != ERROR_OK)
1294 /* make sure data cache is cleaned & invalidated down to PoC */
1295 if (!armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled) {
1296 armv7a_cache_flush_virt(target, breakpoint->address,
1297 breakpoint->length);
1300 retval = target_write_memory(target,
1301 breakpoint->address & 0xFFFFFFFE,
1302 breakpoint->length, 1, code);
1303 if (retval != ERROR_OK)
1306 /* update i-cache at breakpoint location */
1307 armv7a_l1_d_cache_inval_virt(target, breakpoint->address,
1308 breakpoint->length);
1309 armv7a_l1_i_cache_inval_virt(target, breakpoint->address,
1310 breakpoint->length);
1312 breakpoint->set = 0x11; /* Any nice value but 0 */
1318 static int cortex_a_set_context_breakpoint(struct target *target,
1319 struct breakpoint *breakpoint, uint8_t matchmode)
1321 int retval = ERROR_FAIL;
1324 uint8_t byte_addr_select = 0x0F;
1325 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1326 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
1327 struct cortex_a_brp *brp_list = cortex_a->brp_list;
1329 if (breakpoint->set) {
1330 LOG_WARNING("breakpoint already set");
1333 /*check available context BRPs*/
1334 while ((brp_list[brp_i].used ||
1335 (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < cortex_a->brp_num))
1338 if (brp_i >= cortex_a->brp_num) {
1339 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1343 breakpoint->set = brp_i + 1;
1344 control = ((matchmode & 0x7) << 20)
1345 | (byte_addr_select << 5)
1347 brp_list[brp_i].used = 1;
1348 brp_list[brp_i].value = (breakpoint->asid);
1349 brp_list[brp_i].control = control;
1350 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1351 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1352 brp_list[brp_i].value);
1353 if (retval != ERROR_OK)
1355 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1356 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1357 brp_list[brp_i].control);
1358 if (retval != ERROR_OK)
1360 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1361 brp_list[brp_i].control,
1362 brp_list[brp_i].value);
1367 static int cortex_a_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
1369 int retval = ERROR_FAIL;
1370 int brp_1 = 0; /* holds the contextID pair */
1371 int brp_2 = 0; /* holds the IVA pair */
1372 uint32_t control_CTX, control_IVA;
1373 uint8_t CTX_byte_addr_select = 0x0F;
1374 uint8_t IVA_byte_addr_select = 0x0F;
1375 uint8_t CTX_machmode = 0x03;
1376 uint8_t IVA_machmode = 0x01;
1377 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1378 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
1379 struct cortex_a_brp *brp_list = cortex_a->brp_list;
1381 if (breakpoint->set) {
1382 LOG_WARNING("breakpoint already set");
1385 /*check available context BRPs*/
1386 while ((brp_list[brp_1].used ||
1387 (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < cortex_a->brp_num))
1390 printf("brp(CTX) found num: %d\n", brp_1);
1391 if (brp_1 >= cortex_a->brp_num) {
1392 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1396 while ((brp_list[brp_2].used ||
1397 (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < cortex_a->brp_num))
1400 printf("brp(IVA) found num: %d\n", brp_2);
1401 if (brp_2 >= cortex_a->brp_num) {
1402 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1406 breakpoint->set = brp_1 + 1;
1407 breakpoint->linked_BRP = brp_2;
1408 control_CTX = ((CTX_machmode & 0x7) << 20)
1411 | (CTX_byte_addr_select << 5)
1413 brp_list[brp_1].used = 1;
1414 brp_list[brp_1].value = (breakpoint->asid);
1415 brp_list[brp_1].control = control_CTX;
1416 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1417 + CPUDBG_BVR_BASE + 4 * brp_list[brp_1].BRPn,
1418 brp_list[brp_1].value);
1419 if (retval != ERROR_OK)
1421 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1422 + CPUDBG_BCR_BASE + 4 * brp_list[brp_1].BRPn,
1423 brp_list[brp_1].control);
1424 if (retval != ERROR_OK)
1427 control_IVA = ((IVA_machmode & 0x7) << 20)
1429 | (IVA_byte_addr_select << 5)
1431 brp_list[brp_2].used = 1;
1432 brp_list[brp_2].value = (breakpoint->address & 0xFFFFFFFC);
1433 brp_list[brp_2].control = control_IVA;
1434 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1435 + CPUDBG_BVR_BASE + 4 * brp_list[brp_2].BRPn,
1436 brp_list[brp_2].value);
1437 if (retval != ERROR_OK)
1439 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1440 + CPUDBG_BCR_BASE + 4 * brp_list[brp_2].BRPn,
1441 brp_list[brp_2].control);
1442 if (retval != ERROR_OK)
1448 static int cortex_a_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1451 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1452 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
1453 struct cortex_a_brp *brp_list = cortex_a->brp_list;
1455 if (!breakpoint->set) {
1456 LOG_WARNING("breakpoint not set");
1460 if (breakpoint->type == BKPT_HARD) {
1461 if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
1462 int brp_i = breakpoint->set - 1;
1463 int brp_j = breakpoint->linked_BRP;
1464 if ((brp_i < 0) || (brp_i >= cortex_a->brp_num)) {
1465 LOG_DEBUG("Invalid BRP number in breakpoint");
1468 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1469 brp_list[brp_i].control, brp_list[brp_i].value);
1470 brp_list[brp_i].used = 0;
1471 brp_list[brp_i].value = 0;
1472 brp_list[brp_i].control = 0;
1473 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1474 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1475 brp_list[brp_i].control);
1476 if (retval != ERROR_OK)
1478 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1479 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1480 brp_list[brp_i].value);
1481 if (retval != ERROR_OK)
1483 if ((brp_j < 0) || (brp_j >= cortex_a->brp_num)) {
1484 LOG_DEBUG("Invalid BRP number in breakpoint");
1487 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_j,
1488 brp_list[brp_j].control, brp_list[brp_j].value);
1489 brp_list[brp_j].used = 0;
1490 brp_list[brp_j].value = 0;
1491 brp_list[brp_j].control = 0;
1492 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1493 + CPUDBG_BCR_BASE + 4 * brp_list[brp_j].BRPn,
1494 brp_list[brp_j].control);
1495 if (retval != ERROR_OK)
1497 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1498 + CPUDBG_BVR_BASE + 4 * brp_list[brp_j].BRPn,
1499 brp_list[brp_j].value);
1500 if (retval != ERROR_OK)
1502 breakpoint->linked_BRP = 0;
1503 breakpoint->set = 0;
1507 int brp_i = breakpoint->set - 1;
1508 if ((brp_i < 0) || (brp_i >= cortex_a->brp_num)) {
1509 LOG_DEBUG("Invalid BRP number in breakpoint");
1512 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1513 brp_list[brp_i].control, brp_list[brp_i].value);
1514 brp_list[brp_i].used = 0;
1515 brp_list[brp_i].value = 0;
1516 brp_list[brp_i].control = 0;
1517 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1518 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1519 brp_list[brp_i].control);
1520 if (retval != ERROR_OK)
1522 retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base
1523 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1524 brp_list[brp_i].value);
1525 if (retval != ERROR_OK)
1527 breakpoint->set = 0;
1532 /* make sure data cache is cleaned & invalidated down to PoC */
1533 if (!armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled) {
1534 armv7a_cache_flush_virt(target, breakpoint->address,
1535 breakpoint->length);
1538 /* restore original instruction (kept in target endianness) */
1539 if (breakpoint->length == 4) {
1540 retval = target_write_memory(target,
1541 breakpoint->address & 0xFFFFFFFE,
1542 4, 1, breakpoint->orig_instr);
1543 if (retval != ERROR_OK)
1546 retval = target_write_memory(target,
1547 breakpoint->address & 0xFFFFFFFE,
1548 2, 1, breakpoint->orig_instr);
1549 if (retval != ERROR_OK)
1553 /* update i-cache at breakpoint location */
1554 armv7a_l1_d_cache_inval_virt(target, breakpoint->address,
1555 breakpoint->length);
1556 armv7a_l1_i_cache_inval_virt(target, breakpoint->address,
1557 breakpoint->length);
1559 breakpoint->set = 0;
1564 static int cortex_a_add_breakpoint(struct target *target,
1565 struct breakpoint *breakpoint)
1567 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1569 if ((breakpoint->type == BKPT_HARD) && (cortex_a->brp_num_available < 1)) {
1570 LOG_INFO("no hardware breakpoint available");
1571 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1574 if (breakpoint->type == BKPT_HARD)
1575 cortex_a->brp_num_available--;
1577 return cortex_a_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1580 static int cortex_a_add_context_breakpoint(struct target *target,
1581 struct breakpoint *breakpoint)
1583 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1585 if ((breakpoint->type == BKPT_HARD) && (cortex_a->brp_num_available < 1)) {
1586 LOG_INFO("no hardware breakpoint available");
1587 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1590 if (breakpoint->type == BKPT_HARD)
1591 cortex_a->brp_num_available--;
1593 return cortex_a_set_context_breakpoint(target, breakpoint, 0x02); /* asid match */
1596 static int cortex_a_add_hybrid_breakpoint(struct target *target,
1597 struct breakpoint *breakpoint)
1599 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1601 if ((breakpoint->type == BKPT_HARD) && (cortex_a->brp_num_available < 1)) {
1602 LOG_INFO("no hardware breakpoint available");
1603 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1606 if (breakpoint->type == BKPT_HARD)
1607 cortex_a->brp_num_available--;
1609 return cortex_a_set_hybrid_breakpoint(target, breakpoint); /* ??? */
1613 static int cortex_a_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1615 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
1618 /* It is perfectly possible to remove breakpoints while the target is running */
1619 if (target->state != TARGET_HALTED) {
1620 LOG_WARNING("target not halted");
1621 return ERROR_TARGET_NOT_HALTED;
1625 if (breakpoint->set) {
1626 cortex_a_unset_breakpoint(target, breakpoint);
1627 if (breakpoint->type == BKPT_HARD)
1628 cortex_a->brp_num_available++;
1636 * Cortex-A Reset functions
1639 static int cortex_a_assert_reset(struct target *target)
1641 struct armv7a_common *armv7a = target_to_armv7a(target);
1645 /* FIXME when halt is requested, make it work somehow... */
1647 /* This function can be called in "target not examined" state */
1649 /* Issue some kind of warm reset. */
1650 if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
1651 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1652 else if (jtag_get_reset_config() & RESET_HAS_SRST) {
1653 /* REVISIT handle "pulls" cases, if there's
1654 * hardware that needs them to work.
1658 * FIXME: fix reset when transport is SWD. This is a temporary
1659 * work-around for release v0.10 that is not intended to stay!
1661 if (transport_is_swd() ||
1662 (target->reset_halt && (jtag_get_reset_config() & RESET_SRST_NO_GATING)))
1663 adapter_assert_reset();
1666 LOG_ERROR("%s: how to reset?", target_name(target));
1670 /* registers are now invalid */
1671 if (target_was_examined(target))
1672 register_cache_invalidate(armv7a->arm.core_cache);
1674 target->state = TARGET_RESET;
1679 static int cortex_a_deassert_reset(struct target *target)
1685 /* be certain SRST is off */
1686 adapter_deassert_reset();
1688 if (target_was_examined(target)) {
1689 retval = cortex_a_poll(target);
1690 if (retval != ERROR_OK)
1694 if (target->reset_halt) {
1695 if (target->state != TARGET_HALTED) {
1696 LOG_WARNING("%s: ran after reset and before halt ...",
1697 target_name(target));
1698 if (target_was_examined(target)) {
1699 retval = target_halt(target);
1700 if (retval != ERROR_OK)
1703 target->state = TARGET_UNKNOWN;
1710 static int cortex_a_set_dcc_mode(struct target *target, uint32_t mode, uint32_t *dscr)
1712 /* Changes the mode of the DCC between non-blocking, stall, and fast mode.
1713 * New desired mode must be in mode. Current value of DSCR must be in
1714 * *dscr, which is updated with new value.
1716 * This function elides actually sending the mode-change over the debug
1717 * interface if the mode is already set as desired.
1719 uint32_t new_dscr = (*dscr & ~DSCR_EXT_DCC_MASK) | mode;
1720 if (new_dscr != *dscr) {
1721 struct armv7a_common *armv7a = target_to_armv7a(target);
1722 int retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
1723 armv7a->debug_base + CPUDBG_DSCR, new_dscr);
1724 if (retval == ERROR_OK)
1732 static int cortex_a_wait_dscr_bits(struct target *target, uint32_t mask,
1733 uint32_t value, uint32_t *dscr)
1735 /* Waits until the specified bit(s) of DSCR take on a specified value. */
1736 struct armv7a_common *armv7a = target_to_armv7a(target);
1740 if ((*dscr & mask) == value)
1743 then = timeval_ms();
1745 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
1746 armv7a->debug_base + CPUDBG_DSCR, dscr);
1747 if (retval != ERROR_OK) {
1748 LOG_ERROR("Could not read DSCR register");
1751 if ((*dscr & mask) == value)
1753 if (timeval_ms() > then + 1000) {
1754 LOG_ERROR("timeout waiting for DSCR bit change");
1761 static int cortex_a_read_copro(struct target *target, uint32_t opcode,
1762 uint32_t *data, uint32_t *dscr)
1765 struct armv7a_common *armv7a = target_to_armv7a(target);
1767 /* Move from coprocessor to R0. */
1768 retval = cortex_a_exec_opcode(target, opcode, dscr);
1769 if (retval != ERROR_OK)
1772 /* Move from R0 to DTRTX. */
1773 retval = cortex_a_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0), dscr);
1774 if (retval != ERROR_OK)
1777 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture
1778 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
1779 * must also check TXfull_l). Most of the time this will be free
1780 * because TXfull_l will be set immediately and cached in dscr. */
1781 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRTX_FULL_LATCHED,
1782 DSCR_DTRTX_FULL_LATCHED, dscr);
1783 if (retval != ERROR_OK)
1786 /* Read the value transferred to DTRTX. */
1787 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
1788 armv7a->debug_base + CPUDBG_DTRTX, data);
1789 if (retval != ERROR_OK)
1795 static int cortex_a_read_dfar_dfsr(struct target *target, uint32_t *dfar,
1796 uint32_t *dfsr, uint32_t *dscr)
1801 retval = cortex_a_read_copro(target, ARMV4_5_MRC(15, 0, 0, 6, 0, 0), dfar, dscr);
1802 if (retval != ERROR_OK)
1807 retval = cortex_a_read_copro(target, ARMV4_5_MRC(15, 0, 0, 5, 0, 0), dfsr, dscr);
1808 if (retval != ERROR_OK)
1815 static int cortex_a_write_copro(struct target *target, uint32_t opcode,
1816 uint32_t data, uint32_t *dscr)
1819 struct armv7a_common *armv7a = target_to_armv7a(target);
1821 /* Write the value into DTRRX. */
1822 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
1823 armv7a->debug_base + CPUDBG_DTRRX, data);
1824 if (retval != ERROR_OK)
1827 /* Move from DTRRX to R0. */
1828 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), dscr);
1829 if (retval != ERROR_OK)
1832 /* Move from R0 to coprocessor. */
1833 retval = cortex_a_exec_opcode(target, opcode, dscr);
1834 if (retval != ERROR_OK)
1837 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture manual
1838 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
1839 * check RXfull_l). Most of the time this will be free because RXfull_l
1840 * will be cleared immediately and cached in dscr. */
1841 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRRX_FULL_LATCHED, 0, dscr);
1842 if (retval != ERROR_OK)
1848 static int cortex_a_write_dfar_dfsr(struct target *target, uint32_t dfar,
1849 uint32_t dfsr, uint32_t *dscr)
1853 retval = cortex_a_write_copro(target, ARMV4_5_MCR(15, 0, 0, 6, 0, 0), dfar, dscr);
1854 if (retval != ERROR_OK)
1857 retval = cortex_a_write_copro(target, ARMV4_5_MCR(15, 0, 0, 5, 0, 0), dfsr, dscr);
1858 if (retval != ERROR_OK)
1864 static int cortex_a_dfsr_to_error_code(uint32_t dfsr)
1866 uint32_t status, upper4;
1868 if (dfsr & (1 << 9)) {
1870 status = dfsr & 0x3f;
1871 upper4 = status >> 2;
1872 if (upper4 == 1 || upper4 == 2 || upper4 == 3 || upper4 == 15)
1873 return ERROR_TARGET_TRANSLATION_FAULT;
1874 else if (status == 33)
1875 return ERROR_TARGET_UNALIGNED_ACCESS;
1877 return ERROR_TARGET_DATA_ABORT;
1879 /* Normal format. */
1880 status = ((dfsr >> 6) & 0x10) | (dfsr & 0xf);
1882 return ERROR_TARGET_UNALIGNED_ACCESS;
1883 else if (status == 5 || status == 7 || status == 3 || status == 6 ||
1884 status == 9 || status == 11 || status == 13 || status == 15)
1885 return ERROR_TARGET_TRANSLATION_FAULT;
1887 return ERROR_TARGET_DATA_ABORT;
1891 static int cortex_a_write_cpu_memory_slow(struct target *target,
1892 uint32_t size, uint32_t count, const uint8_t *buffer, uint32_t *dscr)
1894 /* Writes count objects of size size from *buffer. Old value of DSCR must
1895 * be in *dscr; updated to new value. This is slow because it works for
1896 * non-word-sized objects. Avoid unaligned accesses as they do not work
1897 * on memory address space without "Normal" attribute. If size == 4 and
1898 * the address is aligned, cortex_a_write_cpu_memory_fast should be
1901 * - Address is in R0.
1902 * - R0 is marked dirty.
1904 struct armv7a_common *armv7a = target_to_armv7a(target);
1905 struct arm *arm = &armv7a->arm;
1908 /* Mark register R1 as dirty, to use for transferring data. */
1909 arm_reg_current(arm, 1)->dirty = true;
1911 /* Switch to non-blocking mode if not already in that mode. */
1912 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, dscr);
1913 if (retval != ERROR_OK)
1916 /* Go through the objects. */
1918 /* Write the value to store into DTRRX. */
1919 uint32_t data, opcode;
1923 data = target_buffer_get_u16(target, buffer);
1925 data = target_buffer_get_u32(target, buffer);
1926 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
1927 armv7a->debug_base + CPUDBG_DTRRX, data);
1928 if (retval != ERROR_OK)
1931 /* Transfer the value from DTRRX to R1. */
1932 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), dscr);
1933 if (retval != ERROR_OK)
1936 /* Write the value transferred to R1 into memory. */
1938 opcode = ARMV4_5_STRB_IP(1, 0);
1940 opcode = ARMV4_5_STRH_IP(1, 0);
1942 opcode = ARMV4_5_STRW_IP(1, 0);
1943 retval = cortex_a_exec_opcode(target, opcode, dscr);
1944 if (retval != ERROR_OK)
1947 /* Check for faults and return early. */
1948 if (*dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE))
1949 return ERROR_OK; /* A data fault is not considered a system failure. */
1951 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture
1952 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
1953 * must also check RXfull_l). Most of the time this will be free
1954 * because RXfull_l will be cleared immediately and cached in dscr. */
1955 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRRX_FULL_LATCHED, 0, dscr);
1956 if (retval != ERROR_OK)
1967 static int cortex_a_write_cpu_memory_fast(struct target *target,
1968 uint32_t count, const uint8_t *buffer, uint32_t *dscr)
1970 /* Writes count objects of size 4 from *buffer. Old value of DSCR must be
1971 * in *dscr; updated to new value. This is fast but only works for
1972 * word-sized objects at aligned addresses.
1974 * - Address is in R0 and must be a multiple of 4.
1975 * - R0 is marked dirty.
1977 struct armv7a_common *armv7a = target_to_armv7a(target);
1980 /* Switch to fast mode if not already in that mode. */
1981 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_FAST_MODE, dscr);
1982 if (retval != ERROR_OK)
1985 /* Latch STC instruction. */
1986 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
1987 armv7a->debug_base + CPUDBG_ITR, ARMV4_5_STC(0, 1, 0, 1, 14, 5, 0, 4));
1988 if (retval != ERROR_OK)
1991 /* Transfer all the data and issue all the instructions. */
1992 return mem_ap_write_buf_noincr(armv7a->debug_ap, buffer,
1993 4, count, armv7a->debug_base + CPUDBG_DTRRX);
1996 static int cortex_a_write_cpu_memory(struct target *target,
1997 uint32_t address, uint32_t size,
1998 uint32_t count, const uint8_t *buffer)
2000 /* Write memory through the CPU. */
2001 int retval, final_retval;
2002 struct armv7a_common *armv7a = target_to_armv7a(target);
2003 struct arm *arm = &armv7a->arm;
2004 uint32_t dscr, orig_dfar, orig_dfsr, fault_dscr, fault_dfar, fault_dfsr;
2006 LOG_DEBUG("Writing CPU memory address 0x%" PRIx32 " size %" PRIu32 " count %" PRIu32,
2007 address, size, count);
2008 if (target->state != TARGET_HALTED) {
2009 LOG_WARNING("target not halted");
2010 return ERROR_TARGET_NOT_HALTED;
2016 /* Clear any abort. */
2017 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2018 armv7a->debug_base + CPUDBG_DRCR, DRCR_CLEAR_EXCEPTIONS);
2019 if (retval != ERROR_OK)
2023 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2024 armv7a->debug_base + CPUDBG_DSCR, &dscr);
2025 if (retval != ERROR_OK)
2028 /* Switch to non-blocking mode if not already in that mode. */
2029 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, &dscr);
2030 if (retval != ERROR_OK)
2033 /* Mark R0 as dirty. */
2034 arm_reg_current(arm, 0)->dirty = true;
2036 /* Read DFAR and DFSR, as they will be modified in the event of a fault. */
2037 retval = cortex_a_read_dfar_dfsr(target, &orig_dfar, &orig_dfsr, &dscr);
2038 if (retval != ERROR_OK)
2041 /* Get the memory address into R0. */
2042 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2043 armv7a->debug_base + CPUDBG_DTRRX, address);
2044 if (retval != ERROR_OK)
2046 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), &dscr);
2047 if (retval != ERROR_OK)
2050 if (size == 4 && (address % 4) == 0) {
2051 /* We are doing a word-aligned transfer, so use fast mode. */
2052 retval = cortex_a_write_cpu_memory_fast(target, count, buffer, &dscr);
2054 /* Use slow path. Adjust size for aligned accesses */
2055 switch (address % 4) {
2070 retval = cortex_a_write_cpu_memory_slow(target, size, count, buffer, &dscr);
2074 final_retval = retval;
2076 /* Switch to non-blocking mode if not already in that mode. */
2077 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, &dscr);
2078 if (final_retval == ERROR_OK)
2079 final_retval = retval;
2081 /* Wait for last issued instruction to complete. */
2082 retval = cortex_a_wait_instrcmpl(target, &dscr, true);
2083 if (final_retval == ERROR_OK)
2084 final_retval = retval;
2086 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture manual
2087 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
2088 * check RXfull_l). Most of the time this will be free because RXfull_l
2089 * will be cleared immediately and cached in dscr. However, don't do this
2090 * if there is fault, because then the instruction might not have completed
2092 if (!(dscr & DSCR_STICKY_ABORT_PRECISE)) {
2093 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRRX_FULL_LATCHED, 0, &dscr);
2094 if (retval != ERROR_OK)
2098 /* If there were any sticky abort flags, clear them. */
2099 if (dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE)) {
2101 mem_ap_write_atomic_u32(armv7a->debug_ap,
2102 armv7a->debug_base + CPUDBG_DRCR, DRCR_CLEAR_EXCEPTIONS);
2103 dscr &= ~(DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE);
2108 /* Handle synchronous data faults. */
2109 if (fault_dscr & DSCR_STICKY_ABORT_PRECISE) {
2110 if (final_retval == ERROR_OK) {
2111 /* Final return value will reflect cause of fault. */
2112 retval = cortex_a_read_dfar_dfsr(target, &fault_dfar, &fault_dfsr, &dscr);
2113 if (retval == ERROR_OK) {
2114 LOG_ERROR("data abort at 0x%08" PRIx32 ", dfsr = 0x%08" PRIx32, fault_dfar, fault_dfsr);
2115 final_retval = cortex_a_dfsr_to_error_code(fault_dfsr);
2117 final_retval = retval;
2119 /* Fault destroyed DFAR/DFSR; restore them. */
2120 retval = cortex_a_write_dfar_dfsr(target, orig_dfar, orig_dfsr, &dscr);
2121 if (retval != ERROR_OK)
2122 LOG_ERROR("error restoring dfar/dfsr - dscr = 0x%08" PRIx32, dscr);
2125 /* Handle asynchronous data faults. */
2126 if (fault_dscr & DSCR_STICKY_ABORT_IMPRECISE) {
2127 if (final_retval == ERROR_OK)
2128 /* No other error has been recorded so far, so keep this one. */
2129 final_retval = ERROR_TARGET_DATA_ABORT;
2132 /* If the DCC is nonempty, clear it. */
2133 if (dscr & DSCR_DTRTX_FULL_LATCHED) {
2135 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2136 armv7a->debug_base + CPUDBG_DTRTX, &dummy);
2137 if (final_retval == ERROR_OK)
2138 final_retval = retval;
2140 if (dscr & DSCR_DTRRX_FULL_LATCHED) {
2141 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), &dscr);
2142 if (final_retval == ERROR_OK)
2143 final_retval = retval;
2147 return final_retval;
2150 static int cortex_a_read_cpu_memory_slow(struct target *target,
2151 uint32_t size, uint32_t count, uint8_t *buffer, uint32_t *dscr)
2153 /* Reads count objects of size size into *buffer. Old value of DSCR must be
2154 * in *dscr; updated to new value. This is slow because it works for
2155 * non-word-sized objects. Avoid unaligned accesses as they do not work
2156 * on memory address space without "Normal" attribute. If size == 4 and
2157 * the address is aligned, cortex_a_read_cpu_memory_fast should be
2160 * - Address is in R0.
2161 * - R0 is marked dirty.
2163 struct armv7a_common *armv7a = target_to_armv7a(target);
2164 struct arm *arm = &armv7a->arm;
2167 /* Mark register R1 as dirty, to use for transferring data. */
2168 arm_reg_current(arm, 1)->dirty = true;
2170 /* Switch to non-blocking mode if not already in that mode. */
2171 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, dscr);
2172 if (retval != ERROR_OK)
2175 /* Go through the objects. */
2177 /* Issue a load of the appropriate size to R1. */
2178 uint32_t opcode, data;
2180 opcode = ARMV4_5_LDRB_IP(1, 0);
2182 opcode = ARMV4_5_LDRH_IP(1, 0);
2184 opcode = ARMV4_5_LDRW_IP(1, 0);
2185 retval = cortex_a_exec_opcode(target, opcode, dscr);
2186 if (retval != ERROR_OK)
2189 /* Issue a write of R1 to DTRTX. */
2190 retval = cortex_a_exec_opcode(target, ARMV4_5_MCR(14, 0, 1, 0, 5, 0), dscr);
2191 if (retval != ERROR_OK)
2194 /* Check for faults and return early. */
2195 if (*dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE))
2196 return ERROR_OK; /* A data fault is not considered a system failure. */
2198 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture
2199 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
2200 * must also check TXfull_l). Most of the time this will be free
2201 * because TXfull_l will be set immediately and cached in dscr. */
2202 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRTX_FULL_LATCHED,
2203 DSCR_DTRTX_FULL_LATCHED, dscr);
2204 if (retval != ERROR_OK)
2207 /* Read the value transferred to DTRTX into the buffer. */
2208 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2209 armv7a->debug_base + CPUDBG_DTRTX, &data);
2210 if (retval != ERROR_OK)
2213 *buffer = (uint8_t) data;
2215 target_buffer_set_u16(target, buffer, (uint16_t) data);
2217 target_buffer_set_u32(target, buffer, data);
2227 static int cortex_a_read_cpu_memory_fast(struct target *target,
2228 uint32_t count, uint8_t *buffer, uint32_t *dscr)
2230 /* Reads count objects of size 4 into *buffer. Old value of DSCR must be in
2231 * *dscr; updated to new value. This is fast but only works for word-sized
2232 * objects at aligned addresses.
2234 * - Address is in R0 and must be a multiple of 4.
2235 * - R0 is marked dirty.
2237 struct armv7a_common *armv7a = target_to_armv7a(target);
2241 /* Switch to non-blocking mode if not already in that mode. */
2242 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, dscr);
2243 if (retval != ERROR_OK)
2246 /* Issue the LDC instruction via a write to ITR. */
2247 retval = cortex_a_exec_opcode(target, ARMV4_5_LDC(0, 1, 0, 1, 14, 5, 0, 4), dscr);
2248 if (retval != ERROR_OK)
2254 /* Switch to fast mode if not already in that mode. */
2255 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_FAST_MODE, dscr);
2256 if (retval != ERROR_OK)
2259 /* Latch LDC instruction. */
2260 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2261 armv7a->debug_base + CPUDBG_ITR, ARMV4_5_LDC(0, 1, 0, 1, 14, 5, 0, 4));
2262 if (retval != ERROR_OK)
2265 /* Read the value transferred to DTRTX into the buffer. Due to fast
2266 * mode rules, this blocks until the instruction finishes executing and
2267 * then reissues the read instruction to read the next word from
2268 * memory. The last read of DTRTX in this call reads the second-to-last
2269 * word from memory and issues the read instruction for the last word.
2271 retval = mem_ap_read_buf_noincr(armv7a->debug_ap, buffer,
2272 4, count, armv7a->debug_base + CPUDBG_DTRTX);
2273 if (retval != ERROR_OK)
2277 buffer += count * 4;
2280 /* Wait for last issued instruction to complete. */
2281 retval = cortex_a_wait_instrcmpl(target, dscr, false);
2282 if (retval != ERROR_OK)
2285 /* Switch to non-blocking mode if not already in that mode. */
2286 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, dscr);
2287 if (retval != ERROR_OK)
2290 /* Check for faults and return early. */
2291 if (*dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE))
2292 return ERROR_OK; /* A data fault is not considered a system failure. */
2294 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture manual
2295 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
2296 * check TXfull_l). Most of the time this will be free because TXfull_l
2297 * will be set immediately and cached in dscr. */
2298 retval = cortex_a_wait_dscr_bits(target, DSCR_DTRTX_FULL_LATCHED,
2299 DSCR_DTRTX_FULL_LATCHED, dscr);
2300 if (retval != ERROR_OK)
2303 /* Read the value transferred to DTRTX into the buffer. This is the last
2305 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2306 armv7a->debug_base + CPUDBG_DTRTX, &u32);
2307 if (retval != ERROR_OK)
2309 target_buffer_set_u32(target, buffer, u32);
2314 static int cortex_a_read_cpu_memory(struct target *target,
2315 uint32_t address, uint32_t size,
2316 uint32_t count, uint8_t *buffer)
2318 /* Read memory through the CPU. */
2319 int retval, final_retval;
2320 struct armv7a_common *armv7a = target_to_armv7a(target);
2321 struct arm *arm = &armv7a->arm;
2322 uint32_t dscr, orig_dfar, orig_dfsr, fault_dscr, fault_dfar, fault_dfsr;
2324 LOG_DEBUG("Reading CPU memory address 0x%" PRIx32 " size %" PRIu32 " count %" PRIu32,
2325 address, size, count);
2326 if (target->state != TARGET_HALTED) {
2327 LOG_WARNING("target not halted");
2328 return ERROR_TARGET_NOT_HALTED;
2334 /* Clear any abort. */
2335 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2336 armv7a->debug_base + CPUDBG_DRCR, DRCR_CLEAR_EXCEPTIONS);
2337 if (retval != ERROR_OK)
2341 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2342 armv7a->debug_base + CPUDBG_DSCR, &dscr);
2343 if (retval != ERROR_OK)
2346 /* Switch to non-blocking mode if not already in that mode. */
2347 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, &dscr);
2348 if (retval != ERROR_OK)
2351 /* Mark R0 as dirty. */
2352 arm_reg_current(arm, 0)->dirty = true;
2354 /* Read DFAR and DFSR, as they will be modified in the event of a fault. */
2355 retval = cortex_a_read_dfar_dfsr(target, &orig_dfar, &orig_dfsr, &dscr);
2356 if (retval != ERROR_OK)
2359 /* Get the memory address into R0. */
2360 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2361 armv7a->debug_base + CPUDBG_DTRRX, address);
2362 if (retval != ERROR_OK)
2364 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), &dscr);
2365 if (retval != ERROR_OK)
2368 if (size == 4 && (address % 4) == 0) {
2369 /* We are doing a word-aligned transfer, so use fast mode. */
2370 retval = cortex_a_read_cpu_memory_fast(target, count, buffer, &dscr);
2372 /* Use slow path. Adjust size for aligned accesses */
2373 switch (address % 4) {
2389 retval = cortex_a_read_cpu_memory_slow(target, size, count, buffer, &dscr);
2393 final_retval = retval;
2395 /* Switch to non-blocking mode if not already in that mode. */
2396 retval = cortex_a_set_dcc_mode(target, DSCR_EXT_DCC_NON_BLOCKING, &dscr);
2397 if (final_retval == ERROR_OK)
2398 final_retval = retval;
2400 /* Wait for last issued instruction to complete. */
2401 retval = cortex_a_wait_instrcmpl(target, &dscr, true);
2402 if (final_retval == ERROR_OK)
2403 final_retval = retval;
2405 /* If there were any sticky abort flags, clear them. */
2406 if (dscr & (DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE)) {
2408 mem_ap_write_atomic_u32(armv7a->debug_ap,
2409 armv7a->debug_base + CPUDBG_DRCR, DRCR_CLEAR_EXCEPTIONS);
2410 dscr &= ~(DSCR_STICKY_ABORT_PRECISE | DSCR_STICKY_ABORT_IMPRECISE);
2415 /* Handle synchronous data faults. */
2416 if (fault_dscr & DSCR_STICKY_ABORT_PRECISE) {
2417 if (final_retval == ERROR_OK) {
2418 /* Final return value will reflect cause of fault. */
2419 retval = cortex_a_read_dfar_dfsr(target, &fault_dfar, &fault_dfsr, &dscr);
2420 if (retval == ERROR_OK) {
2421 LOG_ERROR("data abort at 0x%08" PRIx32 ", dfsr = 0x%08" PRIx32, fault_dfar, fault_dfsr);
2422 final_retval = cortex_a_dfsr_to_error_code(fault_dfsr);
2424 final_retval = retval;
2426 /* Fault destroyed DFAR/DFSR; restore them. */
2427 retval = cortex_a_write_dfar_dfsr(target, orig_dfar, orig_dfsr, &dscr);
2428 if (retval != ERROR_OK)
2429 LOG_ERROR("error restoring dfar/dfsr - dscr = 0x%08" PRIx32, dscr);
2432 /* Handle asynchronous data faults. */
2433 if (fault_dscr & DSCR_STICKY_ABORT_IMPRECISE) {
2434 if (final_retval == ERROR_OK)
2435 /* No other error has been recorded so far, so keep this one. */
2436 final_retval = ERROR_TARGET_DATA_ABORT;
2439 /* If the DCC is nonempty, clear it. */
2440 if (dscr & DSCR_DTRTX_FULL_LATCHED) {
2442 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2443 armv7a->debug_base + CPUDBG_DTRTX, &dummy);
2444 if (final_retval == ERROR_OK)
2445 final_retval = retval;
2447 if (dscr & DSCR_DTRRX_FULL_LATCHED) {
2448 retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), &dscr);
2449 if (final_retval == ERROR_OK)
2450 final_retval = retval;
2454 return final_retval;
2459 * Cortex-A Memory access
2461 * This is same Cortex-M3 but we must also use the correct
2462 * ap number for every access.
2465 static int cortex_a_read_phys_memory(struct target *target,
2466 target_addr_t address, uint32_t size,
2467 uint32_t count, uint8_t *buffer)
2471 if (!count || !buffer)
2472 return ERROR_COMMAND_SYNTAX_ERROR;
2474 LOG_DEBUG("Reading memory at real address " TARGET_ADDR_FMT "; size %" PRId32 "; count %" PRId32,
2475 address, size, count);
2477 /* read memory through the CPU */
2478 cortex_a_prep_memaccess(target, 1);
2479 retval = cortex_a_read_cpu_memory(target, address, size, count, buffer);
2480 cortex_a_post_memaccess(target, 1);
2485 static int cortex_a_read_memory(struct target *target, target_addr_t address,
2486 uint32_t size, uint32_t count, uint8_t *buffer)
2490 /* cortex_a handles unaligned memory access */
2491 LOG_DEBUG("Reading memory at address " TARGET_ADDR_FMT "; size %" PRId32 "; count %" PRId32,
2492 address, size, count);
2494 cortex_a_prep_memaccess(target, 0);
2495 retval = cortex_a_read_cpu_memory(target, address, size, count, buffer);
2496 cortex_a_post_memaccess(target, 0);
2501 static int cortex_a_write_phys_memory(struct target *target,
2502 target_addr_t address, uint32_t size,
2503 uint32_t count, const uint8_t *buffer)
2507 if (!count || !buffer)
2508 return ERROR_COMMAND_SYNTAX_ERROR;
2510 LOG_DEBUG("Writing memory to real address " TARGET_ADDR_FMT "; size %" PRId32 "; count %" PRId32,
2511 address, size, count);
2513 /* write memory through the CPU */
2514 cortex_a_prep_memaccess(target, 1);
2515 retval = cortex_a_write_cpu_memory(target, address, size, count, buffer);
2516 cortex_a_post_memaccess(target, 1);
2521 static int cortex_a_write_memory(struct target *target, target_addr_t address,
2522 uint32_t size, uint32_t count, const uint8_t *buffer)
2526 /* cortex_a handles unaligned memory access */
2527 LOG_DEBUG("Writing memory at address " TARGET_ADDR_FMT "; size %" PRId32 "; count %" PRId32,
2528 address, size, count);
2530 /* memory writes bypass the caches, must flush before writing */
2531 armv7a_cache_auto_flush_on_write(target, address, size * count);
2533 cortex_a_prep_memaccess(target, 0);
2534 retval = cortex_a_write_cpu_memory(target, address, size, count, buffer);
2535 cortex_a_post_memaccess(target, 0);
2539 static int cortex_a_read_buffer(struct target *target, target_addr_t address,
2540 uint32_t count, uint8_t *buffer)
2544 /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
2545 * will have something to do with the size we leave to it. */
2546 for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
2547 if (address & size) {
2548 int retval = target_read_memory(target, address, size, 1, buffer);
2549 if (retval != ERROR_OK)
2557 /* Read the data with as large access size as possible. */
2558 for (; size > 0; size /= 2) {
2559 uint32_t aligned = count - count % size;
2561 int retval = target_read_memory(target, address, size, aligned / size, buffer);
2562 if (retval != ERROR_OK)
2573 static int cortex_a_write_buffer(struct target *target, target_addr_t address,
2574 uint32_t count, const uint8_t *buffer)
2578 /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
2579 * will have something to do with the size we leave to it. */
2580 for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
2581 if (address & size) {
2582 int retval = target_write_memory(target, address, size, 1, buffer);
2583 if (retval != ERROR_OK)
2591 /* Write the data with as large access size as possible. */
2592 for (; size > 0; size /= 2) {
2593 uint32_t aligned = count - count % size;
2595 int retval = target_write_memory(target, address, size, aligned / size, buffer);
2596 if (retval != ERROR_OK)
2607 static int cortex_a_handle_target_request(void *priv)
2609 struct target *target = priv;
2610 struct armv7a_common *armv7a = target_to_armv7a(target);
2613 if (!target_was_examined(target))
2615 if (!target->dbg_msg_enabled)
2618 if (target->state == TARGET_RUNNING) {
2621 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2622 armv7a->debug_base + CPUDBG_DSCR, &dscr);
2624 /* check if we have data */
2625 int64_t then = timeval_ms();
2626 while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
2627 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2628 armv7a->debug_base + CPUDBG_DTRTX, &request);
2629 if (retval == ERROR_OK) {
2630 target_request(target, request);
2631 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2632 armv7a->debug_base + CPUDBG_DSCR, &dscr);
2634 if (timeval_ms() > then + 1000) {
2635 LOG_ERROR("Timeout waiting for dtr tx full");
2645 * Cortex-A target information and configuration
2648 static int cortex_a_examine_first(struct target *target)
2650 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
2651 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
2652 struct adiv5_dap *swjdp = armv7a->arm.dap;
2655 int retval = ERROR_OK;
2656 uint32_t didr, cpuid, dbg_osreg;
2658 /* Search for the APB-AP - it is needed for access to debug registers */
2659 retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv7a->debug_ap);
2660 if (retval != ERROR_OK) {
2661 LOG_ERROR("Could not find APB-AP for debug access");
2665 retval = mem_ap_init(armv7a->debug_ap);
2666 if (retval != ERROR_OK) {
2667 LOG_ERROR("Could not initialize the APB-AP");
2671 armv7a->debug_ap->memaccess_tck = 80;
2673 if (!target->dbgbase_set) {
2675 /* Get ROM Table base */
2677 int32_t coreidx = target->coreid;
2678 LOG_DEBUG("%s's dbgbase is not set, trying to detect using the ROM table",
2680 retval = dap_get_debugbase(armv7a->debug_ap, &dbgbase, &apid);
2681 if (retval != ERROR_OK)
2683 /* Lookup 0x15 -- Processor DAP */
2684 retval = dap_lookup_cs_component(armv7a->debug_ap, dbgbase, 0x15,
2685 &armv7a->debug_base, &coreidx);
2686 if (retval != ERROR_OK) {
2687 LOG_ERROR("Can't detect %s's dbgbase from the ROM table; you need to specify it explicitly.",
2691 LOG_DEBUG("Detected core %" PRId32 " dbgbase: %08" PRIx32,
2692 target->coreid, armv7a->debug_base);
2694 armv7a->debug_base = target->dbgbase;
2696 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2697 armv7a->debug_base + CPUDBG_DIDR, &didr);
2698 if (retval != ERROR_OK) {
2699 LOG_DEBUG("Examine %s failed", "DIDR");
2703 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2704 armv7a->debug_base + CPUDBG_CPUID, &cpuid);
2705 if (retval != ERROR_OK) {
2706 LOG_DEBUG("Examine %s failed", "CPUID");
2710 LOG_DEBUG("didr = 0x%08" PRIx32, didr);
2711 LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
2713 cortex_a->didr = didr;
2714 cortex_a->cpuid = cpuid;
2716 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2717 armv7a->debug_base + CPUDBG_PRSR, &dbg_osreg);
2718 if (retval != ERROR_OK)
2720 LOG_DEBUG("target->coreid %" PRId32 " DBGPRSR 0x%" PRIx32, target->coreid, dbg_osreg);
2722 if ((dbg_osreg & PRSR_POWERUP_STATUS) == 0) {
2723 LOG_ERROR("target->coreid %" PRId32 " powered down!", target->coreid);
2724 target->state = TARGET_UNKNOWN; /* TARGET_NO_POWER? */
2725 return ERROR_TARGET_INIT_FAILED;
2728 if (dbg_osreg & PRSR_STICKY_RESET_STATUS)
2729 LOG_DEBUG("target->coreid %" PRId32 " was reset!", target->coreid);
2731 /* Read DBGOSLSR and check if OSLK is implemented */
2732 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2733 armv7a->debug_base + CPUDBG_OSLSR, &dbg_osreg);
2734 if (retval != ERROR_OK)
2736 LOG_DEBUG("target->coreid %" PRId32 " DBGOSLSR 0x%" PRIx32, target->coreid, dbg_osreg);
2738 /* check if OS Lock is implemented */
2739 if ((dbg_osreg & OSLSR_OSLM) == OSLSR_OSLM0 || (dbg_osreg & OSLSR_OSLM) == OSLSR_OSLM1) {
2740 /* check if OS Lock is set */
2741 if (dbg_osreg & OSLSR_OSLK) {
2742 LOG_DEBUG("target->coreid %" PRId32 " OSLock set! Trying to unlock", target->coreid);
2744 retval = mem_ap_write_atomic_u32(armv7a->debug_ap,
2745 armv7a->debug_base + CPUDBG_OSLAR,
2747 if (retval == ERROR_OK)
2748 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2749 armv7a->debug_base + CPUDBG_OSLSR, &dbg_osreg);
2751 /* if we fail to access the register or cannot reset the OSLK bit, bail out */
2752 if (retval != ERROR_OK || (dbg_osreg & OSLSR_OSLK) != 0) {
2753 LOG_ERROR("target->coreid %" PRId32 " OSLock sticky, core not powered?",
2755 target->state = TARGET_UNKNOWN; /* TARGET_NO_POWER? */
2756 return ERROR_TARGET_INIT_FAILED;
2761 armv7a->arm.core_type = ARM_MODE_MON;
2763 /* Avoid recreating the registers cache */
2764 if (!target_was_examined(target)) {
2765 retval = cortex_a_dpm_setup(cortex_a, didr);
2766 if (retval != ERROR_OK)
2770 /* Setup Breakpoint Register Pairs */
2771 cortex_a->brp_num = ((didr >> 24) & 0x0F) + 1;
2772 cortex_a->brp_num_context = ((didr >> 20) & 0x0F) + 1;
2773 cortex_a->brp_num_available = cortex_a->brp_num;
2774 free(cortex_a->brp_list);
2775 cortex_a->brp_list = calloc(cortex_a->brp_num, sizeof(struct cortex_a_brp));
2776 /* cortex_a->brb_enabled = ????; */
2777 for (i = 0; i < cortex_a->brp_num; i++) {
2778 cortex_a->brp_list[i].used = 0;
2779 if (i < (cortex_a->brp_num-cortex_a->brp_num_context))
2780 cortex_a->brp_list[i].type = BRP_NORMAL;
2782 cortex_a->brp_list[i].type = BRP_CONTEXT;
2783 cortex_a->brp_list[i].value = 0;
2784 cortex_a->brp_list[i].control = 0;
2785 cortex_a->brp_list[i].BRPn = i;
2788 LOG_DEBUG("Configured %i hw breakpoints", cortex_a->brp_num);
2790 /* select debug_ap as default */
2791 swjdp->apsel = armv7a->debug_ap->ap_num;
2793 target_set_examined(target);
2797 static int cortex_a_examine(struct target *target)
2799 int retval = ERROR_OK;
2801 /* Reestablish communication after target reset */
2802 retval = cortex_a_examine_first(target);
2804 /* Configure core debug access */
2805 if (retval == ERROR_OK)
2806 retval = cortex_a_init_debug_access(target);
2812 * Cortex-A target creation and initialization
2815 static int cortex_a_init_target(struct command_context *cmd_ctx,
2816 struct target *target)
2818 /* examine_first() does a bunch of this */
2819 arm_semihosting_init(target);
2823 static int cortex_a_init_arch_info(struct target *target,
2824 struct cortex_a_common *cortex_a, struct adiv5_dap *dap)
2826 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
2828 /* Setup struct cortex_a_common */
2829 cortex_a->common_magic = CORTEX_A_COMMON_MAGIC;
2830 armv7a->arm.dap = dap;
2832 /* register arch-specific functions */
2833 armv7a->examine_debug_reason = NULL;
2835 armv7a->post_debug_entry = cortex_a_post_debug_entry;
2837 armv7a->pre_restore_context = NULL;
2839 armv7a->armv7a_mmu.read_physical_memory = cortex_a_read_phys_memory;
2842 /* arm7_9->handle_target_request = cortex_a_handle_target_request; */
2844 /* REVISIT v7a setup should be in a v7a-specific routine */
2845 armv7a_init_arch_info(target, armv7a);
2846 target_register_timer_callback(cortex_a_handle_target_request, 1,
2847 TARGET_TIMER_TYPE_PERIODIC, target);
2852 static int cortex_a_target_create(struct target *target, Jim_Interp *interp)
2854 struct cortex_a_common *cortex_a;
2855 struct adiv5_private_config *pc;
2857 if (target->private_config == NULL)
2860 pc = (struct adiv5_private_config *)target->private_config;
2862 cortex_a = calloc(1, sizeof(struct cortex_a_common));
2863 if (cortex_a == NULL) {
2864 LOG_ERROR("Out of memory");
2867 cortex_a->common_magic = CORTEX_A_COMMON_MAGIC;
2868 cortex_a->armv7a_common.is_armv7r = false;
2869 cortex_a->armv7a_common.arm.arm_vfp_version = ARM_VFP_V3;
2871 return cortex_a_init_arch_info(target, cortex_a, pc->dap);
2874 static int cortex_r4_target_create(struct target *target, Jim_Interp *interp)
2876 struct cortex_a_common *cortex_a;
2877 struct adiv5_private_config *pc;
2879 pc = (struct adiv5_private_config *)target->private_config;
2880 if (adiv5_verify_config(pc) != ERROR_OK)
2883 cortex_a = calloc(1, sizeof(struct cortex_a_common));
2884 if (cortex_a == NULL) {
2885 LOG_ERROR("Out of memory");
2888 cortex_a->common_magic = CORTEX_A_COMMON_MAGIC;
2889 cortex_a->armv7a_common.is_armv7r = true;
2891 return cortex_a_init_arch_info(target, cortex_a, pc->dap);
2894 static void cortex_a_deinit_target(struct target *target)
2896 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
2897 struct armv7a_common *armv7a = &cortex_a->armv7a_common;
2898 struct arm_dpm *dpm = &armv7a->dpm;
2902 if (target_was_examined(target)) {
2903 /* Disable halt for breakpoint, watchpoint and vector catch */
2904 retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
2905 armv7a->debug_base + CPUDBG_DSCR, &dscr);
2906 if (retval == ERROR_OK)
2907 mem_ap_write_atomic_u32(armv7a->debug_ap,
2908 armv7a->debug_base + CPUDBG_DSCR,
2909 dscr & ~DSCR_HALT_DBG_MODE);
2912 free(cortex_a->brp_list);
2915 free(target->private_config);
2919 static int cortex_a_mmu(struct target *target, int *enabled)
2921 struct armv7a_common *armv7a = target_to_armv7a(target);
2923 if (target->state != TARGET_HALTED) {
2924 LOG_ERROR("%s: target not halted", __func__);
2925 return ERROR_TARGET_INVALID;
2928 if (armv7a->is_armv7r)
2931 *enabled = target_to_cortex_a(target)->armv7a_common.armv7a_mmu.mmu_enabled;
2936 static int cortex_a_virt2phys(struct target *target,
2937 target_addr_t virt, target_addr_t *phys)
2940 int mmu_enabled = 0;
2943 * If the MMU was not enabled at debug entry, there is no
2944 * way of knowing if there was ever a valid configuration
2945 * for it and thus it's not safe to enable it. In this case,
2946 * just return the virtual address as physical.
2948 cortex_a_mmu(target, &mmu_enabled);
2954 /* mmu must be enable in order to get a correct translation */
2955 retval = cortex_a_mmu_modify(target, 1);
2956 if (retval != ERROR_OK)
2958 return armv7a_mmu_translate_va_pa(target, (uint32_t)virt,
2962 COMMAND_HANDLER(cortex_a_handle_cache_info_command)
2964 struct target *target = get_current_target(CMD_CTX);
2965 struct armv7a_common *armv7a = target_to_armv7a(target);
2967 return armv7a_handle_cache_info_command(CMD,
2968 &armv7a->armv7a_mmu.armv7a_cache);
2972 COMMAND_HANDLER(cortex_a_handle_dbginit_command)
2974 struct target *target = get_current_target(CMD_CTX);
2975 if (!target_was_examined(target)) {
2976 LOG_ERROR("target not examined yet");
2980 return cortex_a_init_debug_access(target);
2983 COMMAND_HANDLER(handle_cortex_a_mask_interrupts_command)
2985 struct target *target = get_current_target(CMD_CTX);
2986 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
2988 static const Jim_Nvp nvp_maskisr_modes[] = {
2989 { .name = "off", .value = CORTEX_A_ISRMASK_OFF },
2990 { .name = "on", .value = CORTEX_A_ISRMASK_ON },
2991 { .name = NULL, .value = -1 },
2996 n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
2997 if (n->name == NULL) {
2998 LOG_ERROR("Unknown parameter: %s - should be off or on", CMD_ARGV[0]);
2999 return ERROR_COMMAND_SYNTAX_ERROR;
3002 cortex_a->isrmasking_mode = n->value;
3005 n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, cortex_a->isrmasking_mode);
3006 command_print(CMD, "cortex_a interrupt mask %s", n->name);
3011 COMMAND_HANDLER(handle_cortex_a_dacrfixup_command)
3013 struct target *target = get_current_target(CMD_CTX);
3014 struct cortex_a_common *cortex_a = target_to_cortex_a(target);
3016 static const Jim_Nvp nvp_dacrfixup_modes[] = {
3017 { .name = "off", .value = CORTEX_A_DACRFIXUP_OFF },
3018 { .name = "on", .value = CORTEX_A_DACRFIXUP_ON },
3019 { .name = NULL, .value = -1 },
3024 n = Jim_Nvp_name2value_simple(nvp_dacrfixup_modes, CMD_ARGV[0]);
3025 if (n->name == NULL)
3026 return ERROR_COMMAND_SYNTAX_ERROR;
3027 cortex_a->dacrfixup_mode = n->value;
3031 n = Jim_Nvp_value2name_simple(nvp_dacrfixup_modes, cortex_a->dacrfixup_mode);
3032 command_print(CMD, "cortex_a domain access control fixup %s", n->name);
3037 static const struct command_registration cortex_a_exec_command_handlers[] = {
3039 .name = "cache_info",
3040 .handler = cortex_a_handle_cache_info_command,
3041 .mode = COMMAND_EXEC,
3042 .help = "display information about target caches",
3047 .handler = cortex_a_handle_dbginit_command,
3048 .mode = COMMAND_EXEC,
3049 .help = "Initialize core debug",
3054 .handler = handle_cortex_a_mask_interrupts_command,
3055 .mode = COMMAND_ANY,
3056 .help = "mask cortex_a interrupts",
3057 .usage = "['on'|'off']",
3060 .name = "dacrfixup",
3061 .handler = handle_cortex_a_dacrfixup_command,
3062 .mode = COMMAND_ANY,
3063 .help = "set domain access control (DACR) to all-manager "
3065 .usage = "['on'|'off']",
3068 .chain = armv7a_mmu_command_handlers,
3071 .chain = smp_command_handlers,
3074 COMMAND_REGISTRATION_DONE
3076 static const struct command_registration cortex_a_command_handlers[] = {
3078 .chain = arm_command_handlers,
3081 .chain = armv7a_command_handlers,
3085 .mode = COMMAND_ANY,
3086 .help = "Cortex-A command group",
3088 .chain = cortex_a_exec_command_handlers,
3090 COMMAND_REGISTRATION_DONE
3093 struct target_type cortexa_target = {
3095 .deprecated_name = "cortex_a8",
3097 .poll = cortex_a_poll,
3098 .arch_state = armv7a_arch_state,
3100 .halt = cortex_a_halt,
3101 .resume = cortex_a_resume,
3102 .step = cortex_a_step,
3104 .assert_reset = cortex_a_assert_reset,
3105 .deassert_reset = cortex_a_deassert_reset,
3107 /* REVISIT allow exporting VFP3 registers ... */
3108 .get_gdb_arch = arm_get_gdb_arch,
3109 .get_gdb_reg_list = arm_get_gdb_reg_list,
3111 .read_memory = cortex_a_read_memory,
3112 .write_memory = cortex_a_write_memory,
3114 .read_buffer = cortex_a_read_buffer,
3115 .write_buffer = cortex_a_write_buffer,
3117 .checksum_memory = arm_checksum_memory,
3118 .blank_check_memory = arm_blank_check_memory,
3120 .run_algorithm = armv4_5_run_algorithm,
3122 .add_breakpoint = cortex_a_add_breakpoint,
3123 .add_context_breakpoint = cortex_a_add_context_breakpoint,
3124 .add_hybrid_breakpoint = cortex_a_add_hybrid_breakpoint,
3125 .remove_breakpoint = cortex_a_remove_breakpoint,
3126 .add_watchpoint = NULL,
3127 .remove_watchpoint = NULL,
3129 .commands = cortex_a_command_handlers,
3130 .target_create = cortex_a_target_create,
3131 .target_jim_configure = adiv5_jim_configure,
3132 .init_target = cortex_a_init_target,
3133 .examine = cortex_a_examine,
3134 .deinit_target = cortex_a_deinit_target,
3136 .read_phys_memory = cortex_a_read_phys_memory,
3137 .write_phys_memory = cortex_a_write_phys_memory,
3138 .mmu = cortex_a_mmu,
3139 .virt2phys = cortex_a_virt2phys,
3142 static const struct command_registration cortex_r4_exec_command_handlers[] = {
3145 .handler = cortex_a_handle_dbginit_command,
3146 .mode = COMMAND_EXEC,
3147 .help = "Initialize core debug",
3152 .handler = handle_cortex_a_mask_interrupts_command,
3153 .mode = COMMAND_EXEC,
3154 .help = "mask cortex_r4 interrupts",
3155 .usage = "['on'|'off']",
3158 COMMAND_REGISTRATION_DONE
3160 static const struct command_registration cortex_r4_command_handlers[] = {
3162 .chain = arm_command_handlers,
3165 .name = "cortex_r4",
3166 .mode = COMMAND_ANY,
3167 .help = "Cortex-R4 command group",
3169 .chain = cortex_r4_exec_command_handlers,
3171 COMMAND_REGISTRATION_DONE
3174 struct target_type cortexr4_target = {
3175 .name = "cortex_r4",
3177 .poll = cortex_a_poll,
3178 .arch_state = armv7a_arch_state,
3180 .halt = cortex_a_halt,
3181 .resume = cortex_a_resume,
3182 .step = cortex_a_step,
3184 .assert_reset = cortex_a_assert_reset,
3185 .deassert_reset = cortex_a_deassert_reset,
3187 /* REVISIT allow exporting VFP3 registers ... */
3188 .get_gdb_arch = arm_get_gdb_arch,
3189 .get_gdb_reg_list = arm_get_gdb_reg_list,
3191 .read_memory = cortex_a_read_phys_memory,
3192 .write_memory = cortex_a_write_phys_memory,
3194 .checksum_memory = arm_checksum_memory,
3195 .blank_check_memory = arm_blank_check_memory,
3197 .run_algorithm = armv4_5_run_algorithm,
3199 .add_breakpoint = cortex_a_add_breakpoint,
3200 .add_context_breakpoint = cortex_a_add_context_breakpoint,
3201 .add_hybrid_breakpoint = cortex_a_add_hybrid_breakpoint,
3202 .remove_breakpoint = cortex_a_remove_breakpoint,
3203 .add_watchpoint = NULL,
3204 .remove_watchpoint = NULL,
3206 .commands = cortex_r4_command_handlers,
3207 .target_create = cortex_r4_target_create,
3208 .target_jim_configure = adiv5_jim_configure,
3209 .init_target = cortex_a_init_target,
3210 .examine = cortex_a_examine,
3211 .deinit_target = cortex_a_deinit_target,