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 <helper/time_support.h>
32 static int aarch64_poll(struct target *target);
33 static int aarch64_debug_entry(struct target *target);
34 static int aarch64_restore_context(struct target *target, bool bpwp);
35 static int aarch64_set_breakpoint(struct target *target,
36 struct breakpoint *breakpoint, uint8_t matchmode);
37 static int aarch64_set_context_breakpoint(struct target *target,
38 struct breakpoint *breakpoint, uint8_t matchmode);
39 static int aarch64_set_hybrid_breakpoint(struct target *target,
40 struct breakpoint *breakpoint);
41 static int aarch64_unset_breakpoint(struct target *target,
42 struct breakpoint *breakpoint);
43 static int aarch64_mmu(struct target *target, int *enabled);
44 static int aarch64_virt2phys(struct target *target,
45 target_addr_t virt, target_addr_t *phys);
46 static int aarch64_read_apb_ap_memory(struct target *target,
47 uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
48 static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
49 uint32_t opcode, uint32_t data);
51 static int aarch64_restore_system_control_reg(struct target *target)
53 int retval = ERROR_OK;
55 struct aarch64_common *aarch64 = target_to_aarch64(target);
56 struct armv8_common *armv8 = target_to_armv8(target);
58 if (aarch64->system_control_reg != aarch64->system_control_reg_curr) {
59 aarch64->system_control_reg_curr = aarch64->system_control_reg;
60 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
62 switch (armv8->arm.core_mode) {
66 retval = armv8->arm.msr(target, 3, /*op 0*/
69 aarch64->system_control_reg);
70 if (retval != ERROR_OK)
75 retval = armv8->arm.msr(target, 3, /*op 0*/
78 aarch64->system_control_reg);
79 if (retval != ERROR_OK)
84 retval = armv8->arm.msr(target, 3, /*op 0*/
87 aarch64->system_control_reg);
88 if (retval != ERROR_OK)
92 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
98 /* check address before aarch64_apb read write access with mmu on
99 * remove apb predictible data abort */
100 static int aarch64_check_address(struct target *target, uint32_t address)
105 /* modify system_control_reg in order to enable or disable mmu for :
106 * - virt2phys address conversion
107 * - read or write memory in phys or virt address */
108 static int aarch64_mmu_modify(struct target *target, int enable)
110 struct aarch64_common *aarch64 = target_to_aarch64(target);
111 struct armv8_common *armv8 = &aarch64->armv8_common;
112 int retval = ERROR_OK;
115 /* if mmu enabled at target stop and mmu not enable */
116 if (!(aarch64->system_control_reg & 0x1U)) {
117 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
120 if (!(aarch64->system_control_reg_curr & 0x1U)) {
121 aarch64->system_control_reg_curr |= 0x1U;
122 switch (armv8->arm.core_mode) {
126 retval = armv8->arm.msr(target, 3, /*op 0*/
129 aarch64->system_control_reg_curr);
130 if (retval != ERROR_OK)
135 retval = armv8->arm.msr(target, 3, /*op 0*/
138 aarch64->system_control_reg_curr);
139 if (retval != ERROR_OK)
144 retval = armv8->arm.msr(target, 3, /*op 0*/
147 aarch64->system_control_reg_curr);
148 if (retval != ERROR_OK)
152 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
156 if (aarch64->system_control_reg_curr & 0x4U) {
157 /* data cache is active */
158 aarch64->system_control_reg_curr &= ~0x4U;
159 /* flush data cache armv7 function to be called */
160 if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache)
161 armv8->armv8_mmu.armv8_cache.flush_all_data_cache(target);
163 if ((aarch64->system_control_reg_curr & 0x1U)) {
164 aarch64->system_control_reg_curr &= ~0x1U;
165 switch (armv8->arm.core_mode) {
169 retval = armv8->arm.msr(target, 3, /*op 0*/
172 aarch64->system_control_reg_curr);
173 if (retval != ERROR_OK)
178 retval = armv8->arm.msr(target, 3, /*op 0*/
181 aarch64->system_control_reg_curr);
182 if (retval != ERROR_OK)
187 retval = armv8->arm.msr(target, 3, /*op 0*/
190 aarch64->system_control_reg_curr);
191 if (retval != ERROR_OK)
195 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
204 * Basic debug access, very low level assumes state is saved
206 static int aarch64_init_debug_access(struct target *target)
208 struct armv8_common *armv8 = target_to_armv8(target);
214 /* Unlocking the debug registers for modification
215 * The debugport might be uninitialised so try twice */
216 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
217 armv8->debug_base + CPUV8_DBG_LOCKACCESS, 0xC5ACCE55);
218 if (retval != ERROR_OK) {
220 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
221 armv8->debug_base + CPUV8_DBG_LOCKACCESS, 0xC5ACCE55);
222 if (retval == ERROR_OK)
223 LOG_USER("Locking debug access failed on first, but succeeded on second try.");
225 if (retval != ERROR_OK)
227 /* Clear Sticky Power Down status Bit in PRSR to enable access to
228 the registers in the Core Power Domain */
229 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
230 armv8->debug_base + CPUV8_DBG_PRSR, &dummy);
231 if (retval != ERROR_OK)
234 /* Enabling of instruction execution in debug mode is done in debug_entry code */
236 /* Resync breakpoint registers */
238 /* Since this is likely called from init or reset, update target state information*/
239 return aarch64_poll(target);
242 /* To reduce needless round-trips, pass in a pointer to the current
243 * DSCR value. Initialize it to zero if you just need to know the
244 * value on return from this function; or DSCR_ITE if you
245 * happen to know that no instruction is pending.
247 static int aarch64_exec_opcode(struct target *target,
248 uint32_t opcode, uint32_t *dscr_p)
252 struct armv8_common *armv8 = target_to_armv8(target);
253 dscr = dscr_p ? *dscr_p : 0;
255 LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
257 /* Wait for InstrCompl bit to be set */
258 long long then = timeval_ms();
259 while ((dscr & DSCR_ITE) == 0) {
260 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
261 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
262 if (retval != ERROR_OK) {
263 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
266 if (timeval_ms() > then + 1000) {
267 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
272 retval = mem_ap_write_u32(armv8->debug_ap,
273 armv8->debug_base + CPUV8_DBG_ITR, opcode);
274 if (retval != ERROR_OK)
279 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
280 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
281 if (retval != ERROR_OK) {
282 LOG_ERROR("Could not read DSCR register");
285 if (timeval_ms() > then + 1000) {
286 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
289 } while ((dscr & DSCR_ITE) == 0); /* Wait for InstrCompl bit to be set */
297 /* Write to memory mapped registers directly with no cache or mmu handling */
298 static int aarch64_dap_write_memap_register_u32(struct target *target,
303 struct armv8_common *armv8 = target_to_armv8(target);
305 retval = mem_ap_write_atomic_u32(armv8->debug_ap, address, value);
311 * AARCH64 implementation of Debug Programmer's Model
313 * NOTE the invariant: these routines return with DSCR_ITE set,
314 * so there's no need to poll for it before executing an instruction.
316 * NOTE that in several of these cases the "stall" mode might be useful.
317 * It'd let us queue a few operations together... prepare/finish might
318 * be the places to enable/disable that mode.
321 static inline struct aarch64_common *dpm_to_a8(struct arm_dpm *dpm)
323 return container_of(dpm, struct aarch64_common, armv8_common.dpm);
326 static int aarch64_write_dcc(struct armv8_common *armv8, uint32_t data)
328 LOG_DEBUG("write DCC 0x%08" PRIx32, data);
329 return mem_ap_write_u32(armv8->debug_ap,
330 armv8->debug_base + CPUV8_DBG_DTRRX, data);
333 static int aarch64_write_dcc_64(struct armv8_common *armv8, uint64_t data)
336 LOG_DEBUG("write DCC Low word0x%08" PRIx32, (unsigned)data);
337 LOG_DEBUG("write DCC High word 0x%08" PRIx32, (unsigned)(data >> 32));
338 ret = mem_ap_write_u32(armv8->debug_ap,
339 armv8->debug_base + CPUV8_DBG_DTRRX, data);
340 ret += mem_ap_write_u32(armv8->debug_ap,
341 armv8->debug_base + CPUV8_DBG_DTRTX, data >> 32);
345 static int aarch64_read_dcc(struct armv8_common *armv8, uint32_t *data,
348 uint32_t dscr = DSCR_ITE;
354 /* Wait for DTRRXfull */
355 long long then = timeval_ms();
356 while ((dscr & DSCR_DTR_TX_FULL) == 0) {
357 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
358 armv8->debug_base + CPUV8_DBG_DSCR,
360 if (retval != ERROR_OK)
362 if (timeval_ms() > then + 1000) {
363 LOG_ERROR("Timeout waiting for read dcc");
368 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
369 armv8->debug_base + CPUV8_DBG_DTRTX,
371 if (retval != ERROR_OK)
373 LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
381 static int aarch64_read_dcc_64(struct armv8_common *armv8, uint64_t *data,
384 uint32_t dscr = DSCR_ITE;
391 /* Wait for DTRRXfull */
392 long long then = timeval_ms();
393 while ((dscr & DSCR_DTR_TX_FULL) == 0) {
394 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
395 armv8->debug_base + CPUV8_DBG_DSCR,
397 if (retval != ERROR_OK)
399 if (timeval_ms() > then + 1000) {
400 LOG_ERROR("Timeout waiting for read dcc");
405 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
406 armv8->debug_base + CPUV8_DBG_DTRTX,
408 if (retval != ERROR_OK)
411 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
412 armv8->debug_base + CPUV8_DBG_DTRRX,
414 if (retval != ERROR_OK)
417 *data = *(uint32_t *)data | (uint64_t)higher << 32;
418 LOG_DEBUG("read DCC 0x%16.16" PRIx64, *data);
426 static int aarch64_dpm_prepare(struct arm_dpm *dpm)
428 struct aarch64_common *a8 = dpm_to_a8(dpm);
432 /* set up invariant: INSTR_COMP is set after ever DPM operation */
433 long long then = timeval_ms();
435 retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
436 a8->armv8_common.debug_base + CPUV8_DBG_DSCR,
438 if (retval != ERROR_OK)
440 if ((dscr & DSCR_ITE) != 0)
442 if (timeval_ms() > then + 1000) {
443 LOG_ERROR("Timeout waiting for dpm prepare");
448 /* this "should never happen" ... */
449 if (dscr & DSCR_DTR_RX_FULL) {
450 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
452 retval = mem_ap_read_u32(a8->armv8_common.debug_ap,
453 a8->armv8_common.debug_base + CPUV8_DBG_DTRRX, &dscr);
454 if (retval != ERROR_OK)
457 /* Clear sticky error */
458 retval = mem_ap_write_u32(a8->armv8_common.debug_ap,
459 a8->armv8_common.debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
460 if (retval != ERROR_OK)
467 static int aarch64_dpm_finish(struct arm_dpm *dpm)
469 /* REVISIT what could be done here? */
473 static int aarch64_instr_execute(struct arm_dpm *dpm,
476 struct aarch64_common *a8 = dpm_to_a8(dpm);
477 uint32_t dscr = DSCR_ITE;
479 return aarch64_exec_opcode(
480 a8->armv8_common.arm.target,
485 static int aarch64_instr_write_data_dcc(struct arm_dpm *dpm,
486 uint32_t opcode, uint32_t data)
488 struct aarch64_common *a8 = dpm_to_a8(dpm);
490 uint32_t dscr = DSCR_ITE;
492 retval = aarch64_write_dcc(&a8->armv8_common, data);
493 if (retval != ERROR_OK)
496 return aarch64_exec_opcode(
497 a8->armv8_common.arm.target,
502 static int aarch64_instr_write_data_dcc_64(struct arm_dpm *dpm,
503 uint32_t opcode, uint64_t data)
505 struct aarch64_common *a8 = dpm_to_a8(dpm);
507 uint32_t dscr = DSCR_ITE;
509 retval = aarch64_write_dcc_64(&a8->armv8_common, data);
510 if (retval != ERROR_OK)
513 return aarch64_exec_opcode(
514 a8->armv8_common.arm.target,
519 static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
520 uint32_t opcode, uint32_t data)
522 struct aarch64_common *a8 = dpm_to_a8(dpm);
523 uint32_t dscr = DSCR_ITE;
526 retval = aarch64_write_dcc(&a8->armv8_common, data);
527 if (retval != ERROR_OK)
530 retval = aarch64_exec_opcode(
531 a8->armv8_common.arm.target,
532 ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 0),
534 if (retval != ERROR_OK)
537 /* then the opcode, taking data from R0 */
538 retval = aarch64_exec_opcode(
539 a8->armv8_common.arm.target,
546 static int aarch64_instr_write_data_r0_64(struct arm_dpm *dpm,
547 uint32_t opcode, uint64_t data)
549 struct aarch64_common *a8 = dpm_to_a8(dpm);
550 uint32_t dscr = DSCR_ITE;
553 retval = aarch64_write_dcc_64(&a8->armv8_common, data);
554 if (retval != ERROR_OK)
557 retval = aarch64_exec_opcode(
558 a8->armv8_common.arm.target,
559 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0),
561 if (retval != ERROR_OK)
564 /* then the opcode, taking data from R0 */
565 retval = aarch64_exec_opcode(
566 a8->armv8_common.arm.target,
573 static int aarch64_instr_cpsr_sync(struct arm_dpm *dpm)
575 struct target *target = dpm->arm->target;
576 uint32_t dscr = DSCR_ITE;
578 /* "Prefetch flush" after modifying execution status in CPSR */
579 return aarch64_exec_opcode(target,
584 static int aarch64_instr_read_data_dcc(struct arm_dpm *dpm,
585 uint32_t opcode, uint32_t *data)
587 struct aarch64_common *a8 = dpm_to_a8(dpm);
589 uint32_t dscr = DSCR_ITE;
591 /* the opcode, writing data to DCC */
592 retval = aarch64_exec_opcode(
593 a8->armv8_common.arm.target,
596 if (retval != ERROR_OK)
599 return aarch64_read_dcc(&a8->armv8_common, data, &dscr);
602 static int aarch64_instr_read_data_dcc_64(struct arm_dpm *dpm,
603 uint32_t opcode, uint64_t *data)
605 struct aarch64_common *a8 = dpm_to_a8(dpm);
607 uint32_t dscr = DSCR_ITE;
609 /* the opcode, writing data to DCC */
610 retval = aarch64_exec_opcode(
611 a8->armv8_common.arm.target,
614 if (retval != ERROR_OK)
617 return aarch64_read_dcc_64(&a8->armv8_common, data, &dscr);
620 static int aarch64_instr_read_data_r0(struct arm_dpm *dpm,
621 uint32_t opcode, uint32_t *data)
623 struct aarch64_common *a8 = dpm_to_a8(dpm);
624 uint32_t dscr = DSCR_ITE;
627 /* the opcode, writing data to R0 */
628 retval = aarch64_exec_opcode(
629 a8->armv8_common.arm.target,
632 if (retval != ERROR_OK)
635 /* write R0 to DCC */
636 retval = aarch64_exec_opcode(
637 a8->armv8_common.arm.target,
638 ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 0), /* msr dbgdtr_el0, x0 */
640 if (retval != ERROR_OK)
643 return aarch64_read_dcc(&a8->armv8_common, data, &dscr);
646 static int aarch64_instr_read_data_r0_64(struct arm_dpm *dpm,
647 uint32_t opcode, uint64_t *data)
649 struct aarch64_common *a8 = dpm_to_a8(dpm);
650 uint32_t dscr = DSCR_ITE;
653 /* the opcode, writing data to R0 */
654 retval = aarch64_exec_opcode(
655 a8->armv8_common.arm.target,
658 if (retval != ERROR_OK)
661 /* write R0 to DCC */
662 retval = aarch64_exec_opcode(
663 a8->armv8_common.arm.target,
664 ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0), /* msr dbgdtr_el0, x0 */
666 if (retval != ERROR_OK)
669 return aarch64_read_dcc_64(&a8->armv8_common, data, &dscr);
672 static int aarch64_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
673 uint32_t addr, uint32_t control)
675 struct aarch64_common *a8 = dpm_to_a8(dpm);
676 uint32_t vr = a8->armv8_common.debug_base;
677 uint32_t cr = a8->armv8_common.debug_base;
681 case 0 ... 15: /* breakpoints */
682 vr += CPUV8_DBG_BVR_BASE;
683 cr += CPUV8_DBG_BCR_BASE;
685 case 16 ... 31: /* watchpoints */
686 vr += CPUV8_DBG_WVR_BASE;
687 cr += CPUV8_DBG_WCR_BASE;
696 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
697 (unsigned) vr, (unsigned) cr);
699 retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
701 if (retval != ERROR_OK)
703 retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
708 static int aarch64_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
713 struct aarch64_common *a = dpm_to_a8(dpm);
718 cr = a->armv8_common.debug_base + CPUV8_DBG_BCR_BASE;
721 cr = a->armv8_common.debug_base + CPUV8_DBG_WCR_BASE;
729 LOG_DEBUG("A: bpwp disable, cr %08x", (unsigned) cr);
731 /* clear control register */
732 return aarch64_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
736 static int aarch64_dpm_setup(struct aarch64_common *a8, uint32_t debug)
738 struct arm_dpm *dpm = &a8->armv8_common.dpm;
741 dpm->arm = &a8->armv8_common.arm;
744 dpm->prepare = aarch64_dpm_prepare;
745 dpm->finish = aarch64_dpm_finish;
747 dpm->instr_execute = aarch64_instr_execute;
748 dpm->instr_write_data_dcc = aarch64_instr_write_data_dcc;
749 dpm->instr_write_data_dcc_64 = aarch64_instr_write_data_dcc_64;
750 dpm->instr_write_data_r0 = aarch64_instr_write_data_r0;
751 dpm->instr_write_data_r0_64 = aarch64_instr_write_data_r0_64;
752 dpm->instr_cpsr_sync = aarch64_instr_cpsr_sync;
754 dpm->instr_read_data_dcc = aarch64_instr_read_data_dcc;
755 dpm->instr_read_data_dcc_64 = aarch64_instr_read_data_dcc_64;
756 dpm->instr_read_data_r0 = aarch64_instr_read_data_r0;
757 dpm->instr_read_data_r0_64 = aarch64_instr_read_data_r0_64;
759 dpm->arm_reg_current = armv8_reg_current;
761 dpm->bpwp_enable = aarch64_bpwp_enable;
762 dpm->bpwp_disable = aarch64_bpwp_disable;
764 retval = armv8_dpm_setup(dpm);
765 if (retval == ERROR_OK)
766 retval = armv8_dpm_initialize(dpm);
770 static struct target *get_aarch64(struct target *target, int32_t coreid)
772 struct target_list *head;
776 while (head != (struct target_list *)NULL) {
778 if ((curr->coreid == coreid) && (curr->state == TARGET_HALTED))
784 static int aarch64_halt(struct target *target);
786 static int aarch64_halt_smp(struct target *target)
789 struct target_list *head;
792 while (head != (struct target_list *)NULL) {
794 if ((curr != target) && (curr->state != TARGET_HALTED))
795 retval += aarch64_halt(curr);
801 static int update_halt_gdb(struct target *target)
804 if (target->gdb_service && target->gdb_service->core[0] == -1) {
805 target->gdb_service->target = target;
806 target->gdb_service->core[0] = target->coreid;
807 retval += aarch64_halt_smp(target);
813 * Cortex-A8 Run control
816 static int aarch64_poll(struct target *target)
818 int retval = ERROR_OK;
820 struct aarch64_common *aarch64 = target_to_aarch64(target);
821 struct armv8_common *armv8 = &aarch64->armv8_common;
822 enum target_state prev_target_state = target->state;
823 /* toggle to another core is done by gdb as follow */
824 /* maint packet J core_id */
826 /* the next polling trigger an halt event sent to gdb */
827 if ((target->state == TARGET_HALTED) && (target->smp) &&
828 (target->gdb_service) &&
829 (target->gdb_service->target == NULL)) {
830 target->gdb_service->target =
831 get_aarch64(target, target->gdb_service->core[1]);
832 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
835 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
836 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
837 if (retval != ERROR_OK)
839 aarch64->cpudbg_dscr = dscr;
841 if (DSCR_RUN_MODE(dscr) == (DSCR_CORE_HALTED | DSCR_CORE_RESTARTED)) {
842 if (prev_target_state != TARGET_HALTED) {
843 /* We have a halting debug event */
844 LOG_DEBUG("Target halted");
845 target->state = TARGET_HALTED;
846 if ((prev_target_state == TARGET_RUNNING)
847 || (prev_target_state == TARGET_UNKNOWN)
848 || (prev_target_state == TARGET_RESET)) {
849 retval = aarch64_debug_entry(target);
850 if (retval != ERROR_OK)
853 retval = update_halt_gdb(target);
854 if (retval != ERROR_OK)
857 target_call_event_callbacks(target,
858 TARGET_EVENT_HALTED);
860 if (prev_target_state == TARGET_DEBUG_RUNNING) {
863 retval = aarch64_debug_entry(target);
864 if (retval != ERROR_OK)
867 retval = update_halt_gdb(target);
868 if (retval != ERROR_OK)
872 target_call_event_callbacks(target,
873 TARGET_EVENT_DEBUG_HALTED);
876 } else if (DSCR_RUN_MODE(dscr) == DSCR_CORE_RESTARTED)
877 target->state = TARGET_RUNNING;
879 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32, dscr);
880 target->state = TARGET_UNKNOWN;
886 static int aarch64_halt(struct target *target)
888 int retval = ERROR_OK;
890 struct armv8_common *armv8 = target_to_armv8(target);
893 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
894 armv8->cti_base + CTI_CTR, 1);
895 if (retval != ERROR_OK)
898 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
899 armv8->cti_base + CTI_GATE, 3);
900 if (retval != ERROR_OK)
903 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
904 armv8->cti_base + CTI_OUTEN0, 1);
905 if (retval != ERROR_OK)
908 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
909 armv8->cti_base + CTI_OUTEN1, 2);
910 if (retval != ERROR_OK)
914 * add HDE in halting debug mode
916 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
917 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
918 if (retval != ERROR_OK)
921 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
922 armv8->debug_base + CPUV8_DBG_DSCR, dscr | DSCR_HDE);
923 if (retval != ERROR_OK)
926 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
927 armv8->cti_base + CTI_APPPULSE, 1);
928 if (retval != ERROR_OK)
931 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
932 armv8->cti_base + CTI_INACK, 1);
933 if (retval != ERROR_OK)
937 long long then = timeval_ms();
939 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
940 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
941 if (retval != ERROR_OK)
943 if ((dscr & DSCRV8_HALT_MASK) != 0)
945 if (timeval_ms() > then + 1000) {
946 LOG_ERROR("Timeout waiting for halt");
951 target->debug_reason = DBG_REASON_DBGRQ;
956 static int aarch64_internal_restore(struct target *target, int current,
957 uint64_t *address, int handle_breakpoints, int debug_execution)
959 struct armv8_common *armv8 = target_to_armv8(target);
960 struct arm *arm = &armv8->arm;
964 if (!debug_execution)
965 target_free_all_working_areas(target);
967 /* current = 1: continue on current pc, otherwise continue at <address> */
968 resume_pc = buf_get_u64(arm->pc->value, 0, 64);
970 resume_pc = *address;
972 *address = resume_pc;
974 /* Make sure that the Armv7 gdb thumb fixups does not
975 * kill the return address
977 switch (arm->core_state) {
979 resume_pc &= 0xFFFFFFFC;
981 case ARM_STATE_AARCH64:
982 resume_pc &= 0xFFFFFFFFFFFFFFFC;
984 case ARM_STATE_THUMB:
985 case ARM_STATE_THUMB_EE:
986 /* When the return address is loaded into PC
987 * bit 0 must be 1 to stay in Thumb state
991 case ARM_STATE_JAZELLE:
992 LOG_ERROR("How do I resume into Jazelle state??");
995 LOG_DEBUG("resume pc = 0x%16" PRIx64, resume_pc);
996 buf_set_u64(arm->pc->value, 0, 64, resume_pc);
999 dpmv8_modeswitch(&armv8->dpm, ARM_MODE_ANY);
1001 /* called it now before restoring context because it uses cpu
1002 * register r0 for restoring system control register */
1003 retval = aarch64_restore_system_control_reg(target);
1004 if (retval != ERROR_OK)
1006 retval = aarch64_restore_context(target, handle_breakpoints);
1007 if (retval != ERROR_OK)
1009 target->debug_reason = DBG_REASON_NOTHALTED;
1010 target->state = TARGET_RUNNING;
1012 /* registers are now invalid */
1013 register_cache_invalidate(arm->core_cache);
1016 /* the front-end may request us not to handle breakpoints */
1017 if (handle_breakpoints) {
1018 /* Single step past breakpoint at current address */
1019 breakpoint = breakpoint_find(target, resume_pc);
1021 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
1022 cortex_m3_unset_breakpoint(target, breakpoint);
1023 cortex_m3_single_step_core(target);
1024 cortex_m3_set_breakpoint(target, breakpoint);
1032 static int aarch64_internal_restart(struct target *target)
1034 struct armv8_common *armv8 = target_to_armv8(target);
1035 struct arm *arm = &armv8->arm;
1039 * * Restart core and wait for it to be started. Clear ITRen and sticky
1040 * * exception flags: see ARMv7 ARM, C5.9.
1042 * REVISIT: for single stepping, we probably want to
1043 * disable IRQs by default, with optional override...
1046 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1047 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1048 if (retval != ERROR_OK)
1051 if ((dscr & DSCR_ITE) == 0)
1052 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
1054 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1055 armv8->cti_base + CTI_APPPULSE, 2);
1056 if (retval != ERROR_OK)
1059 long long then = timeval_ms();
1061 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1062 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1063 if (retval != ERROR_OK)
1065 if ((dscr & DSCR_HDE) != 0)
1067 if (timeval_ms() > then + 1000) {
1068 LOG_ERROR("Timeout waiting for resume");
1073 target->debug_reason = DBG_REASON_NOTHALTED;
1074 target->state = TARGET_RUNNING;
1076 /* registers are now invalid */
1077 register_cache_invalidate(arm->core_cache);
1082 static int aarch64_restore_smp(struct target *target, int handle_breakpoints)
1085 struct target_list *head;
1086 struct target *curr;
1088 head = target->head;
1089 while (head != (struct target_list *)NULL) {
1090 curr = head->target;
1091 if ((curr != target) && (curr->state != TARGET_RUNNING)) {
1092 /* resume current address , not in step mode */
1093 retval += aarch64_internal_restore(curr, 1, &address,
1094 handle_breakpoints, 0);
1095 retval += aarch64_internal_restart(curr);
1103 static int aarch64_resume(struct target *target, int current,
1104 target_addr_t address, int handle_breakpoints, int debug_execution)
1107 uint64_t addr = address;
1109 /* dummy resume for smp toggle in order to reduce gdb impact */
1110 if ((target->smp) && (target->gdb_service->core[1] != -1)) {
1111 /* simulate a start and halt of target */
1112 target->gdb_service->target = NULL;
1113 target->gdb_service->core[0] = target->gdb_service->core[1];
1114 /* fake resume at next poll we play the target core[1], see poll*/
1115 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1118 aarch64_internal_restore(target, current, &addr, handle_breakpoints,
1121 target->gdb_service->core[0] = -1;
1122 retval = aarch64_restore_smp(target, handle_breakpoints);
1123 if (retval != ERROR_OK)
1126 aarch64_internal_restart(target);
1128 if (!debug_execution) {
1129 target->state = TARGET_RUNNING;
1130 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1131 LOG_DEBUG("target resumed at 0x%" PRIx64, addr);
1133 target->state = TARGET_DEBUG_RUNNING;
1134 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1135 LOG_DEBUG("target debug resumed at 0x%" PRIx64, addr);
1141 static int aarch64_debug_entry(struct target *target)
1143 int retval = ERROR_OK;
1144 struct aarch64_common *aarch64 = target_to_aarch64(target);
1145 struct armv8_common *armv8 = target_to_armv8(target);
1147 LOG_DEBUG("dscr = 0x%08" PRIx32, aarch64->cpudbg_dscr);
1149 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
1150 * imprecise data aborts get discarded by issuing a Data
1151 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
1154 /* make sure to clear all sticky errors */
1155 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1156 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1157 if (retval != ERROR_OK)
1160 /* Examine debug reason */
1161 armv8_dpm_report_dscr(&armv8->dpm, aarch64->cpudbg_dscr);
1163 /* save address of instruction that triggered the watchpoint? */
1164 if (target->debug_reason == DBG_REASON_WATCHPOINT) {
1168 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1169 armv8->debug_base + CPUV8_DBG_WFAR1,
1171 if (retval != ERROR_OK)
1174 wfar = (wfar << 32);
1175 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1176 armv8->debug_base + CPUV8_DBG_WFAR0,
1178 if (retval != ERROR_OK)
1181 armv8_dpm_report_wfar(&armv8->dpm, wfar);
1184 retval = armv8_dpm_read_current_registers(&armv8->dpm);
1186 if (armv8->post_debug_entry) {
1187 retval = armv8->post_debug_entry(target);
1188 if (retval != ERROR_OK)
1195 static int aarch64_post_debug_entry(struct target *target)
1197 struct aarch64_common *aarch64 = target_to_aarch64(target);
1198 struct armv8_common *armv8 = &aarch64->armv8_common;
1201 mem_ap_write_atomic_u32(armv8->debug_ap,
1202 armv8->debug_base + CPUV8_DBG_DRCR, 1<<2);
1203 switch (armv8->arm.core_mode) {
1207 retval = armv8->arm.mrs(target, 3, /*op 0*/
1208 0, 0, /* op1, op2 */
1209 1, 0, /* CRn, CRm */
1210 &aarch64->system_control_reg);
1211 if (retval != ERROR_OK)
1216 retval = armv8->arm.mrs(target, 3, /*op 0*/
1217 4, 0, /* op1, op2 */
1218 1, 0, /* CRn, CRm */
1219 &aarch64->system_control_reg);
1220 if (retval != ERROR_OK)
1225 retval = armv8->arm.mrs(target, 3, /*op 0*/
1226 6, 0, /* op1, op2 */
1227 1, 0, /* CRn, CRm */
1228 &aarch64->system_control_reg);
1229 if (retval != ERROR_OK)
1233 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
1235 LOG_DEBUG("System_register: %8.8" PRIx32, aarch64->system_control_reg);
1236 aarch64->system_control_reg_curr = aarch64->system_control_reg;
1238 if (armv8->armv8_mmu.armv8_cache.ctype == -1)
1239 armv8_identify_cache(target);
1241 armv8->armv8_mmu.mmu_enabled =
1242 (aarch64->system_control_reg & 0x1U) ? 1 : 0;
1243 armv8->armv8_mmu.armv8_cache.d_u_cache_enabled =
1244 (aarch64->system_control_reg & 0x4U) ? 1 : 0;
1245 armv8->armv8_mmu.armv8_cache.i_cache_enabled =
1246 (aarch64->system_control_reg & 0x1000U) ? 1 : 0;
1247 aarch64->curr_mode = armv8->arm.core_mode;
1251 static int aarch64_step(struct target *target, int current, target_addr_t address,
1252 int handle_breakpoints)
1254 struct armv8_common *armv8 = target_to_armv8(target);
1258 if (target->state != TARGET_HALTED) {
1259 LOG_WARNING("target not halted");
1260 return ERROR_TARGET_NOT_HALTED;
1263 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1264 armv8->debug_base + CPUV8_DBG_EDECR, &tmp);
1265 if (retval != ERROR_OK)
1268 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1269 armv8->debug_base + CPUV8_DBG_EDECR, (tmp|0x4));
1270 if (retval != ERROR_OK)
1273 target->debug_reason = DBG_REASON_SINGLESTEP;
1274 retval = aarch64_resume(target, 1, address, 0, 0);
1275 if (retval != ERROR_OK)
1278 long long then = timeval_ms();
1279 while (target->state != TARGET_HALTED) {
1280 mem_ap_read_atomic_u32(armv8->debug_ap,
1281 armv8->debug_base + CPUV8_DBG_EDESR, &tmp);
1282 LOG_DEBUG("DESR = %#x", tmp);
1283 retval = aarch64_poll(target);
1284 if (retval != ERROR_OK)
1286 if (timeval_ms() > then + 1000) {
1287 LOG_ERROR("timeout waiting for target halt");
1292 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1293 armv8->debug_base + CPUV8_DBG_EDECR, (tmp&(~0x4)));
1294 if (retval != ERROR_OK)
1297 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1298 if (target->state == TARGET_HALTED)
1299 LOG_DEBUG("target stepped");
1304 static int aarch64_restore_context(struct target *target, bool bpwp)
1306 struct armv8_common *armv8 = target_to_armv8(target);
1310 if (armv8->pre_restore_context)
1311 armv8->pre_restore_context(target);
1313 return armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
1318 * Cortex-A8 Breakpoint and watchpoint functions
1321 /* Setup hardware Breakpoint Register Pair */
1322 static int aarch64_set_breakpoint(struct target *target,
1323 struct breakpoint *breakpoint, uint8_t matchmode)
1328 uint8_t byte_addr_select = 0x0F;
1329 struct aarch64_common *aarch64 = target_to_aarch64(target);
1330 struct armv8_common *armv8 = &aarch64->armv8_common;
1331 struct aarch64_brp *brp_list = aarch64->brp_list;
1334 if (breakpoint->set) {
1335 LOG_WARNING("breakpoint already set");
1339 if (breakpoint->type == BKPT_HARD) {
1341 while (brp_list[brp_i].used && (brp_i < aarch64->brp_num))
1343 if (brp_i >= aarch64->brp_num) {
1344 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1345 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1347 breakpoint->set = brp_i + 1;
1348 if (breakpoint->length == 2)
1349 byte_addr_select = (3 << (breakpoint->address & 0x02));
1350 control = ((matchmode & 0x7) << 20)
1352 | (byte_addr_select << 5)
1354 brp_list[brp_i].used = 1;
1355 brp_list[brp_i].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1356 brp_list[brp_i].control = control;
1357 bpt_value = brp_list[brp_i].value;
1359 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1360 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1361 (uint32_t)(bpt_value & 0xFFFFFFFF));
1362 if (retval != ERROR_OK)
1364 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1365 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1366 (uint32_t)(bpt_value >> 32));
1367 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_i].BRPn,
1372 brp_list[brp_i].control);
1373 if (retval != ERROR_OK)
1375 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1376 brp_list[brp_i].control,
1377 brp_list[brp_i].value);
1379 } else if (breakpoint->type == BKPT_SOFT) {
1381 buf_set_u32(code, 0, 32, ARMV8_BKPT(0x11));
1382 retval = target_read_memory(target,
1383 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1384 breakpoint->length, 1,
1385 breakpoint->orig_instr);
1386 if (retval != ERROR_OK)
1388 retval = target_write_memory(target,
1389 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1390 breakpoint->length, 1, code);
1391 if (retval != ERROR_OK)
1393 breakpoint->set = 0x11; /* Any nice value but 0 */
1396 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1397 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1398 /* Ensure that halting debug mode is enable */
1399 dscr = dscr | DSCR_HDE;
1400 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1401 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1402 if (retval != ERROR_OK) {
1403 LOG_DEBUG("Failed to set DSCR.HDE");
1410 static int aarch64_set_context_breakpoint(struct target *target,
1411 struct breakpoint *breakpoint, uint8_t matchmode)
1413 int retval = ERROR_FAIL;
1416 uint8_t byte_addr_select = 0x0F;
1417 struct aarch64_common *aarch64 = target_to_aarch64(target);
1418 struct armv8_common *armv8 = &aarch64->armv8_common;
1419 struct aarch64_brp *brp_list = aarch64->brp_list;
1421 if (breakpoint->set) {
1422 LOG_WARNING("breakpoint already set");
1425 /*check available context BRPs*/
1426 while ((brp_list[brp_i].used ||
1427 (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < aarch64->brp_num))
1430 if (brp_i >= aarch64->brp_num) {
1431 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1435 breakpoint->set = brp_i + 1;
1436 control = ((matchmode & 0x7) << 20)
1438 | (byte_addr_select << 5)
1440 brp_list[brp_i].used = 1;
1441 brp_list[brp_i].value = (breakpoint->asid);
1442 brp_list[brp_i].control = control;
1443 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1444 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1445 brp_list[brp_i].value);
1446 if (retval != ERROR_OK)
1448 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1449 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1450 brp_list[brp_i].control);
1451 if (retval != ERROR_OK)
1453 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1454 brp_list[brp_i].control,
1455 brp_list[brp_i].value);
1460 static int aarch64_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
1462 int retval = ERROR_FAIL;
1463 int brp_1 = 0; /* holds the contextID pair */
1464 int brp_2 = 0; /* holds the IVA pair */
1465 uint32_t control_CTX, control_IVA;
1466 uint8_t CTX_byte_addr_select = 0x0F;
1467 uint8_t IVA_byte_addr_select = 0x0F;
1468 uint8_t CTX_machmode = 0x03;
1469 uint8_t IVA_machmode = 0x01;
1470 struct aarch64_common *aarch64 = target_to_aarch64(target);
1471 struct armv8_common *armv8 = &aarch64->armv8_common;
1472 struct aarch64_brp *brp_list = aarch64->brp_list;
1474 if (breakpoint->set) {
1475 LOG_WARNING("breakpoint already set");
1478 /*check available context BRPs*/
1479 while ((brp_list[brp_1].used ||
1480 (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < aarch64->brp_num))
1483 printf("brp(CTX) found num: %d\n", brp_1);
1484 if (brp_1 >= aarch64->brp_num) {
1485 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1489 while ((brp_list[brp_2].used ||
1490 (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < aarch64->brp_num))
1493 printf("brp(IVA) found num: %d\n", brp_2);
1494 if (brp_2 >= aarch64->brp_num) {
1495 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1499 breakpoint->set = brp_1 + 1;
1500 breakpoint->linked_BRP = brp_2;
1501 control_CTX = ((CTX_machmode & 0x7) << 20)
1504 | (CTX_byte_addr_select << 5)
1506 brp_list[brp_1].used = 1;
1507 brp_list[brp_1].value = (breakpoint->asid);
1508 brp_list[brp_1].control = control_CTX;
1509 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1510 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_1].BRPn,
1511 brp_list[brp_1].value);
1512 if (retval != ERROR_OK)
1514 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1515 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_1].BRPn,
1516 brp_list[brp_1].control);
1517 if (retval != ERROR_OK)
1520 control_IVA = ((IVA_machmode & 0x7) << 20)
1523 | (IVA_byte_addr_select << 5)
1525 brp_list[brp_2].used = 1;
1526 brp_list[brp_2].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1527 brp_list[brp_2].control = control_IVA;
1528 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1529 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_2].BRPn,
1530 brp_list[brp_2].value & 0xFFFFFFFF);
1531 if (retval != ERROR_OK)
1533 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1534 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_2].BRPn,
1535 brp_list[brp_2].value >> 32);
1536 if (retval != ERROR_OK)
1538 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1539 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_2].BRPn,
1540 brp_list[brp_2].control);
1541 if (retval != ERROR_OK)
1547 static int aarch64_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1550 struct aarch64_common *aarch64 = target_to_aarch64(target);
1551 struct armv8_common *armv8 = &aarch64->armv8_common;
1552 struct aarch64_brp *brp_list = aarch64->brp_list;
1554 if (!breakpoint->set) {
1555 LOG_WARNING("breakpoint not set");
1559 if (breakpoint->type == BKPT_HARD) {
1560 if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
1561 int brp_i = breakpoint->set - 1;
1562 int brp_j = breakpoint->linked_BRP;
1563 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1564 LOG_DEBUG("Invalid BRP number in breakpoint");
1567 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1568 brp_list[brp_i].control, brp_list[brp_i].value);
1569 brp_list[brp_i].used = 0;
1570 brp_list[brp_i].value = 0;
1571 brp_list[brp_i].control = 0;
1572 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1573 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1574 brp_list[brp_i].control);
1575 if (retval != ERROR_OK)
1577 if ((brp_j < 0) || (brp_j >= aarch64->brp_num)) {
1578 LOG_DEBUG("Invalid BRP number in breakpoint");
1581 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_j,
1582 brp_list[brp_j].control, brp_list[brp_j].value);
1583 brp_list[brp_j].used = 0;
1584 brp_list[brp_j].value = 0;
1585 brp_list[brp_j].control = 0;
1586 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1587 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_j].BRPn,
1588 brp_list[brp_j].control);
1589 if (retval != ERROR_OK)
1591 breakpoint->linked_BRP = 0;
1592 breakpoint->set = 0;
1596 int brp_i = breakpoint->set - 1;
1597 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1598 LOG_DEBUG("Invalid BRP number in breakpoint");
1601 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_i,
1602 brp_list[brp_i].control, brp_list[brp_i].value);
1603 brp_list[brp_i].used = 0;
1604 brp_list[brp_i].value = 0;
1605 brp_list[brp_i].control = 0;
1606 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1607 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1608 brp_list[brp_i].control);
1609 if (retval != ERROR_OK)
1611 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1612 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1613 brp_list[brp_i].value);
1614 if (retval != ERROR_OK)
1616 breakpoint->set = 0;
1620 /* restore original instruction (kept in target endianness) */
1621 if (breakpoint->length == 4) {
1622 retval = target_write_memory(target,
1623 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1624 4, 1, breakpoint->orig_instr);
1625 if (retval != ERROR_OK)
1628 retval = target_write_memory(target,
1629 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1630 2, 1, breakpoint->orig_instr);
1631 if (retval != ERROR_OK)
1635 breakpoint->set = 0;
1640 static int aarch64_add_breakpoint(struct target *target,
1641 struct breakpoint *breakpoint)
1643 struct aarch64_common *aarch64 = target_to_aarch64(target);
1645 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1646 LOG_INFO("no hardware breakpoint available");
1647 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1650 if (breakpoint->type == BKPT_HARD)
1651 aarch64->brp_num_available--;
1653 return aarch64_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1656 static int aarch64_add_context_breakpoint(struct target *target,
1657 struct breakpoint *breakpoint)
1659 struct aarch64_common *aarch64 = target_to_aarch64(target);
1661 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1662 LOG_INFO("no hardware breakpoint available");
1663 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1666 if (breakpoint->type == BKPT_HARD)
1667 aarch64->brp_num_available--;
1669 return aarch64_set_context_breakpoint(target, breakpoint, 0x02); /* asid match */
1672 static int aarch64_add_hybrid_breakpoint(struct target *target,
1673 struct breakpoint *breakpoint)
1675 struct aarch64_common *aarch64 = target_to_aarch64(target);
1677 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1678 LOG_INFO("no hardware breakpoint available");
1679 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1682 if (breakpoint->type == BKPT_HARD)
1683 aarch64->brp_num_available--;
1685 return aarch64_set_hybrid_breakpoint(target, breakpoint); /* ??? */
1689 static int aarch64_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1691 struct aarch64_common *aarch64 = target_to_aarch64(target);
1694 /* It is perfectly possible to remove breakpoints while the target is running */
1695 if (target->state != TARGET_HALTED) {
1696 LOG_WARNING("target not halted");
1697 return ERROR_TARGET_NOT_HALTED;
1701 if (breakpoint->set) {
1702 aarch64_unset_breakpoint(target, breakpoint);
1703 if (breakpoint->type == BKPT_HARD)
1704 aarch64->brp_num_available++;
1711 * Cortex-A8 Reset functions
1714 static int aarch64_assert_reset(struct target *target)
1716 struct armv8_common *armv8 = target_to_armv8(target);
1720 /* FIXME when halt is requested, make it work somehow... */
1722 /* Issue some kind of warm reset. */
1723 if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
1724 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1725 else if (jtag_get_reset_config() & RESET_HAS_SRST) {
1726 /* REVISIT handle "pulls" cases, if there's
1727 * hardware that needs them to work.
1729 jtag_add_reset(0, 1);
1731 LOG_ERROR("%s: how to reset?", target_name(target));
1735 /* registers are now invalid */
1736 register_cache_invalidate(armv8->arm.core_cache);
1738 target->state = TARGET_RESET;
1743 static int aarch64_deassert_reset(struct target *target)
1749 /* be certain SRST is off */
1750 jtag_add_reset(0, 0);
1752 retval = aarch64_poll(target);
1753 if (retval != ERROR_OK)
1756 if (target->reset_halt) {
1757 if (target->state != TARGET_HALTED) {
1758 LOG_WARNING("%s: ran after reset and before halt ...",
1759 target_name(target));
1760 retval = target_halt(target);
1761 if (retval != ERROR_OK)
1769 static int aarch64_write_apb_ap_memory(struct target *target,
1770 uint64_t address, uint32_t size,
1771 uint32_t count, const uint8_t *buffer)
1773 /* write memory through APB-AP */
1774 int retval = ERROR_COMMAND_SYNTAX_ERROR;
1775 struct armv8_common *armv8 = target_to_armv8(target);
1776 struct arm *arm = &armv8->arm;
1777 int total_bytes = count * size;
1779 int start_byte = address & 0x3;
1780 int end_byte = (address + total_bytes) & 0x3;
1783 uint8_t *tmp_buff = NULL;
1785 LOG_DEBUG("Writing APB-AP memory address 0x%" PRIx64 " size %" PRIu32 " count%" PRIu32,
1786 address, size, count);
1787 if (target->state != TARGET_HALTED) {
1788 LOG_WARNING("target not halted");
1789 return ERROR_TARGET_NOT_HALTED;
1792 total_u32 = DIV_ROUND_UP((address & 3) + total_bytes, 4);
1794 /* Mark register R0 as dirty, as it will be used
1795 * for transferring the data.
1796 * It will be restored automatically when exiting
1799 reg = armv8_reg_current(arm, 1);
1802 reg = armv8_reg_current(arm, 0);
1805 /* clear any abort */
1806 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1807 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1808 if (retval != ERROR_OK)
1812 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1814 /* The algorithm only copies 32 bit words, so the buffer
1815 * should be expanded to include the words at either end.
1816 * The first and last words will be read first to avoid
1817 * corruption if needed.
1819 tmp_buff = malloc(total_u32 * 4);
1821 if ((start_byte != 0) && (total_u32 > 1)) {
1822 /* First bytes not aligned - read the 32 bit word to avoid corrupting
1823 * the other bytes in the word.
1825 retval = aarch64_read_apb_ap_memory(target, (address & ~0x3), 4, 1, tmp_buff);
1826 if (retval != ERROR_OK)
1827 goto error_free_buff_w;
1830 /* If end of write is not aligned, or the write is less than 4 bytes */
1831 if ((end_byte != 0) ||
1832 ((total_u32 == 1) && (total_bytes != 4))) {
1834 /* Read the last word to avoid corruption during 32 bit write */
1835 int mem_offset = (total_u32-1) * 4;
1836 retval = aarch64_read_apb_ap_memory(target, (address & ~0x3) + mem_offset, 4, 1, &tmp_buff[mem_offset]);
1837 if (retval != ERROR_OK)
1838 goto error_free_buff_w;
1841 /* Copy the write buffer over the top of the temporary buffer */
1842 memcpy(&tmp_buff[start_byte], buffer, total_bytes);
1844 /* We now have a 32 bit aligned buffer that can be written */
1847 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1848 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1849 if (retval != ERROR_OK)
1850 goto error_free_buff_w;
1852 /* Set Normal access mode */
1853 dscr = (dscr & ~DSCR_MA);
1854 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1855 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1857 if (arm->core_state == ARM_STATE_AARCH64) {
1858 /* Write X0 with value 'address' using write procedure */
1859 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1860 retval += aarch64_write_dcc_64(armv8, address & ~0x3ULL);
1861 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1862 retval += aarch64_exec_opcode(target,
1863 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
1865 /* Write R0 with value 'address' using write procedure */
1866 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
1867 retval += aarch64_write_dcc(armv8, address & ~0x3ULL);
1868 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1869 retval += aarch64_exec_opcode(target,
1870 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr);
1873 /* Step 1.d - Change DCC to memory mode */
1874 dscr = dscr | DSCR_MA;
1875 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
1876 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1877 if (retval != ERROR_OK)
1878 goto error_unset_dtr_w;
1881 /* Step 2.a - Do the write */
1882 retval = mem_ap_write_buf_noincr(armv8->debug_ap,
1883 tmp_buff, 4, total_u32, armv8->debug_base + CPUV8_DBG_DTRRX);
1884 if (retval != ERROR_OK)
1885 goto error_unset_dtr_w;
1887 /* Step 3.a - Switch DTR mode back to Normal 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 if (retval != ERROR_OK)
1892 goto error_unset_dtr_w;
1894 /* Check for sticky abort flags in the DSCR */
1895 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1896 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1897 if (retval != ERROR_OK)
1898 goto error_free_buff_w;
1899 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
1900 /* Abort occurred - clear it and exit */
1901 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
1902 mem_ap_write_atomic_u32(armv8->debug_ap,
1903 armv8->debug_base + CPUV8_DBG_DRCR, 1<<2);
1904 goto error_free_buff_w;
1912 /* Unset DTR mode */
1913 mem_ap_read_atomic_u32(armv8->debug_ap,
1914 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1915 dscr = (dscr & ~DSCR_MA);
1916 mem_ap_write_atomic_u32(armv8->debug_ap,
1917 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1924 static int aarch64_read_apb_ap_memory(struct target *target,
1925 target_addr_t address, uint32_t size,
1926 uint32_t count, uint8_t *buffer)
1928 /* read memory through APB-AP */
1929 int retval = ERROR_COMMAND_SYNTAX_ERROR;
1930 struct armv8_common *armv8 = target_to_armv8(target);
1931 struct arm *arm = &armv8->arm;
1932 int total_bytes = count * size;
1934 int start_byte = address & 0x3;
1935 int end_byte = (address + total_bytes) & 0x3;
1938 uint8_t *tmp_buff = NULL;
1942 LOG_DEBUG("Reading APB-AP memory address 0x%" TARGET_PRIxADDR " size %" PRIu32 " count%" PRIu32,
1943 address, size, count);
1944 if (target->state != TARGET_HALTED) {
1945 LOG_WARNING("target not halted");
1946 return ERROR_TARGET_NOT_HALTED;
1949 total_u32 = DIV_ROUND_UP((address & 3) + total_bytes, 4);
1950 /* Mark register X0, X1 as dirty, as it will be used
1951 * for transferring the data.
1952 * It will be restored automatically when exiting
1955 reg = armv8_reg_current(arm, 1);
1958 reg = armv8_reg_current(arm, 0);
1961 /* clear any abort */
1962 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1963 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1964 if (retval != ERROR_OK)
1965 goto error_free_buff_r;
1968 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1969 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1971 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1973 /* Set Normal access mode */
1974 dscr = (dscr & ~DSCR_MA);
1975 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
1976 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1978 if (arm->core_state == ARM_STATE_AARCH64) {
1979 /* Write X0 with value 'address' using write procedure */
1980 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1981 retval += aarch64_write_dcc_64(armv8, address & ~0x3ULL);
1982 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1983 retval += aarch64_exec_opcode(target, ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
1984 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
1985 retval += aarch64_exec_opcode(target, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
1986 /* Step 1.e - Change DCC to memory mode */
1987 dscr = dscr | DSCR_MA;
1988 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
1989 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1990 /* Step 1.f - read DBGDTRTX and discard the value */
1991 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
1992 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
1994 /* Write R0 with value 'address' using write procedure */
1995 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
1996 retval += aarch64_write_dcc(armv8, address & ~0x3ULL);
1997 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1998 retval += aarch64_exec_opcode(target,
1999 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr);
2000 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2001 retval += aarch64_exec_opcode(target,
2002 T32_FMTITR(ARMV4_5_MCR(14, 0, 0, 0, 5, 0)), &dscr);
2003 /* Step 1.e - Change DCC to memory mode */
2004 dscr = dscr | DSCR_MA;
2005 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
2006 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2007 /* Step 1.f - read DBGDTRTX and discard the value */
2008 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
2009 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2012 if (retval != ERROR_OK)
2013 goto error_unset_dtr_r;
2015 /* Optimize the read as much as we can, either way we read in a single pass */
2016 if ((start_byte) || (end_byte)) {
2017 /* The algorithm only copies 32 bit words, so the buffer
2018 * should be expanded to include the words at either end.
2019 * The first and last words will be read into a temp buffer
2020 * to avoid corruption
2022 tmp_buff = malloc(total_u32 * 4);
2024 goto error_unset_dtr_r;
2026 /* use the tmp buffer to read the entire data */
2027 u8buf_ptr = tmp_buff;
2029 /* address and read length are aligned so read directly into the passed buffer */
2032 /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
2033 * Abort flags are sticky, so can be read at end of transactions
2035 * This data is read in aligned to 32 bit boundary.
2038 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
2039 * increments X0 by 4. */
2040 retval = mem_ap_read_buf_noincr(armv8->debug_ap, u8buf_ptr, 4, total_u32-1,
2041 armv8->debug_base + CPUV8_DBG_DTRTX);
2042 if (retval != ERROR_OK)
2043 goto error_unset_dtr_r;
2045 /* Step 3.a - set DTR access mode back to Normal mode */
2046 dscr = (dscr & ~DSCR_MA);
2047 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2048 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2049 if (retval != ERROR_OK)
2050 goto error_free_buff_r;
2052 /* Step 3.b - read DBGDTRTX for the final value */
2053 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2054 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2055 memcpy(u8buf_ptr + (total_u32-1) * 4, &value, 4);
2057 /* Check for sticky abort flags in the DSCR */
2058 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2059 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2060 if (retval != ERROR_OK)
2061 goto error_free_buff_r;
2062 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
2063 /* Abort occurred - clear it and exit */
2064 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
2065 mem_ap_write_atomic_u32(armv8->debug_ap,
2066 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
2067 goto error_free_buff_r;
2070 /* check if we need to copy aligned data by applying any shift necessary */
2072 memcpy(buffer, tmp_buff + start_byte, total_bytes);
2080 /* Unset DTR mode */
2081 mem_ap_read_atomic_u32(armv8->debug_ap,
2082 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2083 dscr = (dscr & ~DSCR_MA);
2084 mem_ap_write_atomic_u32(armv8->debug_ap,
2085 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2092 static int aarch64_read_phys_memory(struct target *target,
2093 target_addr_t address, uint32_t size,
2094 uint32_t count, uint8_t *buffer)
2096 struct armv8_common *armv8 = target_to_armv8(target);
2097 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2098 struct adiv5_dap *swjdp = armv8->arm.dap;
2099 uint8_t apsel = swjdp->apsel;
2100 LOG_DEBUG("Reading memory at real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32,
2101 address, size, count);
2103 if (count && buffer) {
2105 if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
2107 /* read memory through AHB-AP */
2108 retval = mem_ap_read_buf(armv8->memory_ap, buffer, size, count, address);
2110 /* read memory through APB-AP */
2111 retval = aarch64_mmu_modify(target, 0);
2112 if (retval != ERROR_OK)
2114 retval = aarch64_read_apb_ap_memory(target, address, size, count, buffer);
2120 static int aarch64_read_memory(struct target *target, target_addr_t address,
2121 uint32_t size, uint32_t count, uint8_t *buffer)
2123 int mmu_enabled = 0;
2124 target_addr_t virt, phys;
2126 struct armv8_common *armv8 = target_to_armv8(target);
2127 struct adiv5_dap *swjdp = armv8->arm.dap;
2128 uint8_t apsel = swjdp->apsel;
2130 /* aarch64 handles unaligned memory access */
2131 LOG_DEBUG("Reading memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
2134 /* determine if MMU was enabled on target stop */
2135 if (!armv8->is_armv7r) {
2136 retval = aarch64_mmu(target, &mmu_enabled);
2137 if (retval != ERROR_OK)
2141 if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
2144 retval = aarch64_virt2phys(target, virt, &phys);
2145 if (retval != ERROR_OK)
2148 LOG_DEBUG("Reading at virtual address. Translating v:0x%" TARGET_PRIxADDR " to r:0x%" TARGET_PRIxADDR,
2152 retval = aarch64_read_phys_memory(target, address, size, count,
2156 retval = aarch64_check_address(target, address);
2157 if (retval != ERROR_OK)
2159 /* enable MMU as we could have disabled it for phys
2161 retval = aarch64_mmu_modify(target, 1);
2162 if (retval != ERROR_OK)
2165 retval = aarch64_read_apb_ap_memory(target, address, size,
2171 static int aarch64_write_phys_memory(struct target *target,
2172 target_addr_t address, uint32_t size,
2173 uint32_t count, const uint8_t *buffer)
2175 struct armv8_common *armv8 = target_to_armv8(target);
2176 struct adiv5_dap *swjdp = armv8->arm.dap;
2177 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2178 uint8_t apsel = swjdp->apsel;
2180 LOG_DEBUG("Writing memory to real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
2183 if (count && buffer) {
2185 if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
2187 /* write memory through AHB-AP */
2188 retval = mem_ap_write_buf(armv8->memory_ap, buffer, size, count, address);
2191 /* write memory through APB-AP */
2192 if (!armv8->is_armv7r) {
2193 retval = aarch64_mmu_modify(target, 0);
2194 if (retval != ERROR_OK)
2197 return aarch64_write_apb_ap_memory(target, address, size, count, buffer);
2202 /* REVISIT this op is generic ARMv7-A/R stuff */
2203 if (retval == ERROR_OK && target->state == TARGET_HALTED) {
2204 struct arm_dpm *dpm = armv8->arm.dpm;
2206 retval = dpm->prepare(dpm);
2207 if (retval != ERROR_OK)
2210 /* The Cache handling will NOT work with MMU active, the
2211 * wrong addresses will be invalidated!
2213 * For both ICache and DCache, walk all cache lines in the
2214 * address range. Cortex-A8 has fixed 64 byte line length.
2216 * REVISIT per ARMv7, these may trigger watchpoints ...
2219 /* invalidate I-Cache */
2220 if (armv8->armv8_mmu.armv8_cache.i_cache_enabled) {
2221 /* ICIMVAU - Invalidate Cache single entry
2223 * MCR p15, 0, r0, c7, c5, 1
2225 for (uint32_t cacheline = address;
2226 cacheline < address + size * count;
2228 retval = dpm->instr_write_data_r0(dpm,
2229 ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
2231 if (retval != ERROR_OK)
2236 /* invalidate D-Cache */
2237 if (armv8->armv8_mmu.armv8_cache.d_u_cache_enabled) {
2238 /* DCIMVAC - Invalidate data Cache line
2240 * MCR p15, 0, r0, c7, c6, 1
2242 for (uint32_t cacheline = address;
2243 cacheline < address + size * count;
2245 retval = dpm->instr_write_data_r0(dpm,
2246 ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
2248 if (retval != ERROR_OK)
2253 /* (void) */ dpm->finish(dpm);
2259 static int aarch64_write_memory(struct target *target, target_addr_t address,
2260 uint32_t size, uint32_t count, const uint8_t *buffer)
2262 int mmu_enabled = 0;
2263 target_addr_t virt, phys;
2265 struct armv8_common *armv8 = target_to_armv8(target);
2266 struct adiv5_dap *swjdp = armv8->arm.dap;
2267 uint8_t apsel = swjdp->apsel;
2269 /* aarch64 handles unaligned memory access */
2270 LOG_DEBUG("Writing memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32
2271 "; count %" PRId32, address, size, count);
2273 /* determine if MMU was enabled on target stop */
2274 if (!armv8->is_armv7r) {
2275 retval = aarch64_mmu(target, &mmu_enabled);
2276 if (retval != ERROR_OK)
2280 if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
2281 LOG_DEBUG("Writing memory to address 0x%" TARGET_PRIxADDR "; size %"
2282 PRId32 "; count %" PRId32, address, size, count);
2285 retval = aarch64_virt2phys(target, virt, &phys);
2286 if (retval != ERROR_OK)
2289 LOG_DEBUG("Writing to virtual address. Translating v:0x%"
2290 TARGET_PRIxADDR " to r:0x%" TARGET_PRIxADDR, virt, phys);
2293 retval = aarch64_write_phys_memory(target, address, size,
2297 retval = aarch64_check_address(target, address);
2298 if (retval != ERROR_OK)
2300 /* enable MMU as we could have disabled it for phys access */
2301 retval = aarch64_mmu_modify(target, 1);
2302 if (retval != ERROR_OK)
2305 retval = aarch64_write_apb_ap_memory(target, address, size, count, buffer);
2310 static int aarch64_handle_target_request(void *priv)
2312 struct target *target = priv;
2313 struct armv8_common *armv8 = target_to_armv8(target);
2316 if (!target_was_examined(target))
2318 if (!target->dbg_msg_enabled)
2321 if (target->state == TARGET_RUNNING) {
2324 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2325 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2327 /* check if we have data */
2328 while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
2329 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2330 armv8->debug_base + CPUV8_DBG_DTRTX, &request);
2331 if (retval == ERROR_OK) {
2332 target_request(target, request);
2333 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2334 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2342 static int aarch64_examine_first(struct target *target)
2344 struct aarch64_common *aarch64 = target_to_aarch64(target);
2345 struct armv8_common *armv8 = &aarch64->armv8_common;
2346 struct adiv5_dap *swjdp = armv8->arm.dap;
2347 int retval = ERROR_OK;
2348 uint32_t pfr, debug, ctypr, ttypr, cpuid;
2351 /* We do one extra read to ensure DAP is configured,
2352 * we call ahbap_debugport_init(swjdp) instead
2354 retval = dap_dp_init(swjdp);
2355 if (retval != ERROR_OK)
2358 /* Search for the APB-AB - it is needed for access to debug registers */
2359 retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap);
2360 if (retval != ERROR_OK) {
2361 LOG_ERROR("Could not find APB-AP for debug access");
2365 retval = mem_ap_init(armv8->debug_ap);
2366 if (retval != ERROR_OK) {
2367 LOG_ERROR("Could not initialize the APB-AP");
2371 armv8->debug_ap->memaccess_tck = 80;
2373 /* Search for the AHB-AB */
2374 armv8->memory_ap_available = false;
2375 retval = dap_find_ap(swjdp, AP_TYPE_AHB_AP, &armv8->memory_ap);
2376 if (retval == ERROR_OK) {
2377 retval = mem_ap_init(armv8->memory_ap);
2378 if (retval == ERROR_OK)
2379 armv8->memory_ap_available = true;
2381 if (retval != ERROR_OK) {
2382 /* AHB-AP not found or unavailable - use the CPU */
2383 LOG_DEBUG("No AHB-AP available for memory access");
2387 if (!target->dbgbase_set) {
2389 /* Get ROM Table base */
2391 int32_t coreidx = target->coreid;
2392 retval = dap_get_debugbase(armv8->debug_ap, &dbgbase, &apid);
2393 if (retval != ERROR_OK)
2395 /* Lookup 0x15 -- Processor DAP */
2396 retval = dap_lookup_cs_component(armv8->debug_ap, dbgbase, 0x15,
2397 &armv8->debug_base, &coreidx);
2398 if (retval != ERROR_OK)
2400 LOG_DEBUG("Detected core %" PRId32 " dbgbase: %08" PRIx32,
2401 coreidx, armv8->debug_base);
2403 armv8->debug_base = target->dbgbase;
2405 LOG_DEBUG("Target ctibase is 0x%x", target->ctibase);
2406 if (target->ctibase == 0)
2407 armv8->cti_base = target->ctibase = armv8->debug_base + 0x1000;
2409 armv8->cti_base = target->ctibase;
2411 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2412 armv8->debug_base + CPUV8_DBG_LOCKACCESS, 0xC5ACCE55);
2413 if (retval != ERROR_OK) {
2414 LOG_DEBUG("Examine %s failed", "oslock");
2418 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2419 armv8->debug_base + 0x88, &cpuid);
2420 LOG_DEBUG("0x88 = %x", cpuid);
2422 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2423 armv8->debug_base + 0x314, &cpuid);
2424 LOG_DEBUG("0x314 = %x", cpuid);
2426 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2427 armv8->debug_base + 0x310, &cpuid);
2428 LOG_DEBUG("0x310 = %x", cpuid);
2429 if (retval != ERROR_OK)
2432 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2433 armv8->debug_base + CPUDBG_CPUID, &cpuid);
2434 if (retval != ERROR_OK) {
2435 LOG_DEBUG("Examine %s failed", "CPUID");
2439 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2440 armv8->debug_base + CPUDBG_CTYPR, &ctypr);
2441 if (retval != ERROR_OK) {
2442 LOG_DEBUG("Examine %s failed", "CTYPR");
2446 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2447 armv8->debug_base + CPUDBG_TTYPR, &ttypr);
2448 if (retval != ERROR_OK) {
2449 LOG_DEBUG("Examine %s failed", "TTYPR");
2453 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2454 armv8->debug_base + ID_AA64PFR0_EL1, &pfr);
2455 if (retval != ERROR_OK) {
2456 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2459 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2460 armv8->debug_base + ID_AA64DFR0_EL1, &debug);
2461 if (retval != ERROR_OK) {
2462 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2466 LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
2467 LOG_DEBUG("ctypr = 0x%08" PRIx32, ctypr);
2468 LOG_DEBUG("ttypr = 0x%08" PRIx32, ttypr);
2469 LOG_DEBUG("ID_AA64PFR0_EL1 = 0x%08" PRIx32, pfr);
2470 LOG_DEBUG("ID_AA64DFR0_EL1 = 0x%08" PRIx32, debug);
2472 armv8->arm.core_type = ARM_MODE_MON;
2473 armv8->arm.core_state = ARM_STATE_AARCH64;
2474 retval = aarch64_dpm_setup(aarch64, debug);
2475 if (retval != ERROR_OK)
2478 /* Setup Breakpoint Register Pairs */
2479 aarch64->brp_num = ((debug >> 12) & 0x0F) + 1;
2480 aarch64->brp_num_context = ((debug >> 28) & 0x0F) + 1;
2482 /* hack - no context bpt support yet */
2483 aarch64->brp_num_context = 0;
2485 aarch64->brp_num_available = aarch64->brp_num;
2486 aarch64->brp_list = calloc(aarch64->brp_num, sizeof(struct aarch64_brp));
2487 for (i = 0; i < aarch64->brp_num; i++) {
2488 aarch64->brp_list[i].used = 0;
2489 if (i < (aarch64->brp_num-aarch64->brp_num_context))
2490 aarch64->brp_list[i].type = BRP_NORMAL;
2492 aarch64->brp_list[i].type = BRP_CONTEXT;
2493 aarch64->brp_list[i].value = 0;
2494 aarch64->brp_list[i].control = 0;
2495 aarch64->brp_list[i].BRPn = i;
2498 LOG_DEBUG("Configured %i hw breakpoints", aarch64->brp_num);
2500 target_set_examined(target);
2504 static int aarch64_examine(struct target *target)
2506 int retval = ERROR_OK;
2508 /* don't re-probe hardware after each reset */
2509 if (!target_was_examined(target))
2510 retval = aarch64_examine_first(target);
2512 /* Configure core debug access */
2513 if (retval == ERROR_OK)
2514 retval = aarch64_init_debug_access(target);
2520 * Cortex-A8 target creation and initialization
2523 static int aarch64_init_target(struct command_context *cmd_ctx,
2524 struct target *target)
2526 /* examine_first() does a bunch of this */
2530 static int aarch64_init_arch_info(struct target *target,
2531 struct aarch64_common *aarch64, struct jtag_tap *tap)
2533 struct armv8_common *armv8 = &aarch64->armv8_common;
2534 struct adiv5_dap *dap = armv8->arm.dap;
2536 armv8->arm.dap = dap;
2538 /* Setup struct aarch64_common */
2539 aarch64->common_magic = AARCH64_COMMON_MAGIC;
2540 /* tap has no dap initialized */
2542 tap->dap = dap_init();
2544 /* Leave (only) generic DAP stuff for debugport_init() */
2545 tap->dap->tap = tap;
2548 armv8->arm.dap = tap->dap;
2550 aarch64->fast_reg_read = 0;
2552 /* register arch-specific functions */
2553 armv8->examine_debug_reason = NULL;
2555 armv8->post_debug_entry = aarch64_post_debug_entry;
2557 armv8->pre_restore_context = NULL;
2559 armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
2561 /* REVISIT v7a setup should be in a v7a-specific routine */
2562 armv8_init_arch_info(target, armv8);
2563 target_register_timer_callback(aarch64_handle_target_request, 1, 1, target);
2568 static int aarch64_target_create(struct target *target, Jim_Interp *interp)
2570 struct aarch64_common *aarch64 = calloc(1, sizeof(struct aarch64_common));
2572 aarch64->armv8_common.is_armv7r = false;
2574 return aarch64_init_arch_info(target, aarch64, target->tap);
2577 static int aarch64_mmu(struct target *target, int *enabled)
2579 if (target->state != TARGET_HALTED) {
2580 LOG_ERROR("%s: target not halted", __func__);
2581 return ERROR_TARGET_INVALID;
2584 *enabled = target_to_aarch64(target)->armv8_common.armv8_mmu.mmu_enabled;
2588 static int aarch64_virt2phys(struct target *target, target_addr_t virt,
2589 target_addr_t *phys)
2591 int retval = ERROR_FAIL;
2592 struct armv8_common *armv8 = target_to_armv8(target);
2593 struct adiv5_dap *swjdp = armv8->arm.dap;
2594 uint8_t apsel = swjdp->apsel;
2595 if (armv8->memory_ap_available && (apsel == armv8->memory_ap->ap_num)) {
2597 retval = armv8_mmu_translate_va(target,
2599 if (retval != ERROR_OK)
2602 } else {/* use this method if armv8->memory_ap not selected
2603 * mmu must be enable in order to get a correct translation */
2604 retval = aarch64_mmu_modify(target, 1);
2605 if (retval != ERROR_OK)
2607 retval = armv8_mmu_translate_va_pa(target, virt, phys, 1);
2613 COMMAND_HANDLER(aarch64_handle_cache_info_command)
2615 struct target *target = get_current_target(CMD_CTX);
2616 struct armv8_common *armv8 = target_to_armv8(target);
2618 return armv8_handle_cache_info_command(CMD_CTX,
2619 &armv8->armv8_mmu.armv8_cache);
2623 COMMAND_HANDLER(aarch64_handle_dbginit_command)
2625 struct target *target = get_current_target(CMD_CTX);
2626 if (!target_was_examined(target)) {
2627 LOG_ERROR("target not examined yet");
2631 return aarch64_init_debug_access(target);
2633 COMMAND_HANDLER(aarch64_handle_smp_off_command)
2635 struct target *target = get_current_target(CMD_CTX);
2636 /* check target is an smp target */
2637 struct target_list *head;
2638 struct target *curr;
2639 head = target->head;
2641 if (head != (struct target_list *)NULL) {
2642 while (head != (struct target_list *)NULL) {
2643 curr = head->target;
2647 /* fixes the target display to the debugger */
2648 target->gdb_service->target = target;
2653 COMMAND_HANDLER(aarch64_handle_smp_on_command)
2655 struct target *target = get_current_target(CMD_CTX);
2656 struct target_list *head;
2657 struct target *curr;
2658 head = target->head;
2659 if (head != (struct target_list *)NULL) {
2661 while (head != (struct target_list *)NULL) {
2662 curr = head->target;
2670 COMMAND_HANDLER(aarch64_handle_smp_gdb_command)
2672 struct target *target = get_current_target(CMD_CTX);
2673 int retval = ERROR_OK;
2674 struct target_list *head;
2675 head = target->head;
2676 if (head != (struct target_list *)NULL) {
2677 if (CMD_ARGC == 1) {
2679 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], coreid);
2680 if (ERROR_OK != retval)
2682 target->gdb_service->core[1] = coreid;
2685 command_print(CMD_CTX, "gdb coreid %" PRId32 " -> %" PRId32, target->gdb_service->core[0]
2686 , target->gdb_service->core[1]);
2691 static const struct command_registration aarch64_exec_command_handlers[] = {
2693 .name = "cache_info",
2694 .handler = aarch64_handle_cache_info_command,
2695 .mode = COMMAND_EXEC,
2696 .help = "display information about target caches",
2701 .handler = aarch64_handle_dbginit_command,
2702 .mode = COMMAND_EXEC,
2703 .help = "Initialize core debug",
2706 { .name = "smp_off",
2707 .handler = aarch64_handle_smp_off_command,
2708 .mode = COMMAND_EXEC,
2709 .help = "Stop smp handling",
2714 .handler = aarch64_handle_smp_on_command,
2715 .mode = COMMAND_EXEC,
2716 .help = "Restart smp handling",
2721 .handler = aarch64_handle_smp_gdb_command,
2722 .mode = COMMAND_EXEC,
2723 .help = "display/fix current core played to gdb",
2728 COMMAND_REGISTRATION_DONE
2730 static const struct command_registration aarch64_command_handlers[] = {
2732 .chain = arm_command_handlers,
2735 .chain = armv8_command_handlers,
2739 .mode = COMMAND_ANY,
2740 .help = "Cortex-A command group",
2742 .chain = aarch64_exec_command_handlers,
2744 COMMAND_REGISTRATION_DONE
2747 struct target_type aarch64_target = {
2750 .poll = aarch64_poll,
2751 .arch_state = armv8_arch_state,
2753 .halt = aarch64_halt,
2754 .resume = aarch64_resume,
2755 .step = aarch64_step,
2757 .assert_reset = aarch64_assert_reset,
2758 .deassert_reset = aarch64_deassert_reset,
2760 /* REVISIT allow exporting VFP3 registers ... */
2761 .get_gdb_reg_list = armv8_get_gdb_reg_list,
2763 .read_memory = aarch64_read_memory,
2764 .write_memory = aarch64_write_memory,
2766 .checksum_memory = arm_checksum_memory,
2767 .blank_check_memory = arm_blank_check_memory,
2769 .run_algorithm = armv4_5_run_algorithm,
2771 .add_breakpoint = aarch64_add_breakpoint,
2772 .add_context_breakpoint = aarch64_add_context_breakpoint,
2773 .add_hybrid_breakpoint = aarch64_add_hybrid_breakpoint,
2774 .remove_breakpoint = aarch64_remove_breakpoint,
2775 .add_watchpoint = NULL,
2776 .remove_watchpoint = NULL,
2778 .commands = aarch64_command_handlers,
2779 .target_create = aarch64_target_create,
2780 .init_target = aarch64_init_target,
2781 .examine = aarch64_examine,
2783 .read_phys_memory = aarch64_read_phys_memory,
2784 .write_phys_memory = aarch64_write_phys_memory,
2786 .virt2phys = aarch64_virt2phys,