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target/aarch64: Use 'bool' data type
[openocd.git] / src / target / aarch64.c
blob1fafcfd45de679e0b3bc067c3b4447a91f409540
1 /***************************************************************************
2 * Copyright (C) 2015 by David Ung *
3 * *
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. *
8 * *
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. *
13 * *
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., *
17 * *
18 ***************************************************************************/
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include "breakpoints.h"
25 #include "aarch64.h"
26 #include "register.h"
27 #include "target_request.h"
28 #include "target_type.h"
29 #include "armv8_opcodes.h"
30 #include "armv8_cache.h"
31 #include "arm_semihosting.h"
32 #include <helper/time_support.h>
33
34 enum restart_mode {
35 RESTART_LAZY,
36 RESTART_SYNC,
37 };
38
39 enum halt_mode {
40 HALT_LAZY,
41 HALT_SYNC,
42 };
43
44 struct aarch64_private_config {
45 struct adiv5_private_config adiv5_config;
46 struct arm_cti *cti;
47 };
48
49 static int aarch64_poll(struct target *target);
50 static int aarch64_debug_entry(struct target *target);
51 static int aarch64_restore_context(struct target *target, bool bpwp);
52 static int aarch64_set_breakpoint(struct target *target,
53 struct breakpoint *breakpoint, uint8_t matchmode);
54 static int aarch64_set_context_breakpoint(struct target *target,
55 struct breakpoint *breakpoint, uint8_t matchmode);
56 static int aarch64_set_hybrid_breakpoint(struct target *target,
57 struct breakpoint *breakpoint);
58 static int aarch64_unset_breakpoint(struct target *target,
59 struct breakpoint *breakpoint);
60 static int aarch64_mmu(struct target *target, int *enabled);
61 static int aarch64_virt2phys(struct target *target,
62 target_addr_t virt, target_addr_t *phys);
63 static int aarch64_read_cpu_memory(struct target *target,
64 uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
65
66 #define foreach_smp_target(pos, head) \
67 for (pos = head; (pos != NULL); pos = pos->next)
68
69 static int aarch64_restore_system_control_reg(struct target *target)
70 {
71 enum arm_mode target_mode = ARM_MODE_ANY;
72 int retval = ERROR_OK;
73 uint32_t instr;
74
75 struct aarch64_common *aarch64 = target_to_aarch64(target);
76 struct armv8_common *armv8 = target_to_armv8(target);
77
78 if (aarch64->system_control_reg != aarch64->system_control_reg_curr) {
79 aarch64->system_control_reg_curr = aarch64->system_control_reg;
80 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
81
82 switch (armv8->arm.core_mode) {
83 case ARMV8_64_EL0T:
84 target_mode = ARMV8_64_EL1H;
85 /* fall through */
86 case ARMV8_64_EL1T:
87 case ARMV8_64_EL1H:
88 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL1, 0);
89 break;
90 case ARMV8_64_EL2T:
91 case ARMV8_64_EL2H:
92 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL2, 0);
93 break;
94 case ARMV8_64_EL3H:
95 case ARMV8_64_EL3T:
96 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL3, 0);
97 break;
98
99 case ARM_MODE_SVC:
100 case ARM_MODE_ABT:
101 case ARM_MODE_FIQ:
102 case ARM_MODE_IRQ:
103 case ARM_MODE_SYS:
104 instr = ARMV4_5_MCR(15, 0, 0, 1, 0, 0);
105 break;
106
107 default:
108 LOG_INFO("cannot read system control register in this mode");
109 return ERROR_FAIL;
110 }
111
112 if (target_mode != ARM_MODE_ANY)
113 armv8_dpm_modeswitch(&armv8->dpm, target_mode);
114
115 retval = armv8->dpm.instr_write_data_r0(&armv8->dpm, instr, aarch64->system_control_reg);
116 if (retval != ERROR_OK)
117 return retval;
118
119 if (target_mode != ARM_MODE_ANY)
120 armv8_dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
121 }
122
123 return retval;
124 }
125
126 /* modify system_control_reg in order to enable or disable mmu for :
127 * - virt2phys address conversion
128 * - read or write memory in phys or virt address */
129 static int aarch64_mmu_modify(struct target *target, int enable)
130 {
131 struct aarch64_common *aarch64 = target_to_aarch64(target);
132 struct armv8_common *armv8 = &aarch64->armv8_common;
133 int retval = ERROR_OK;
134 uint32_t instr = 0;
135
136 if (enable) {
137 /* if mmu enabled at target stop and mmu not enable */
138 if (!(aarch64->system_control_reg & 0x1U)) {
139 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
140 return ERROR_FAIL;
141 }
142 if (!(aarch64->system_control_reg_curr & 0x1U))
143 aarch64->system_control_reg_curr |= 0x1U;
144 } else {
145 if (aarch64->system_control_reg_curr & 0x4U) {
146 /* data cache is active */
147 aarch64->system_control_reg_curr &= ~0x4U;
148 /* flush data cache armv8 function to be called */
149 if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache)
150 armv8->armv8_mmu.armv8_cache.flush_all_data_cache(target);
151 }
152 if ((aarch64->system_control_reg_curr & 0x1U)) {
153 aarch64->system_control_reg_curr &= ~0x1U;
154 }
155 }
156
157 switch (armv8->arm.core_mode) {
158 case ARMV8_64_EL0T:
159 case ARMV8_64_EL1T:
160 case ARMV8_64_EL1H:
161 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL1, 0);
162 break;
163 case ARMV8_64_EL2T:
164 case ARMV8_64_EL2H:
165 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL2, 0);
166 break;
167 case ARMV8_64_EL3H:
168 case ARMV8_64_EL3T:
169 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL3, 0);
170 break;
171
172 case ARM_MODE_SVC:
173 case ARM_MODE_ABT:
174 case ARM_MODE_FIQ:
175 case ARM_MODE_IRQ:
176 case ARM_MODE_SYS:
177 instr = ARMV4_5_MCR(15, 0, 0, 1, 0, 0);
178 break;
179
180 default:
181 LOG_DEBUG("unknown cpu state 0x%" PRIx32, armv8->arm.core_mode);
182 break;
183 }
184
185 retval = armv8->dpm.instr_write_data_r0(&armv8->dpm, instr,
186 aarch64->system_control_reg_curr);
187 return retval;
188 }
189
190 /*
191 * Basic debug access, very low level assumes state is saved
192 */
193 static int aarch64_init_debug_access(struct target *target)
194 {
195 struct armv8_common *armv8 = target_to_armv8(target);
196 int retval;
197 uint32_t dummy;
198
199 LOG_DEBUG("%s", target_name(target));
200
201 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
202 armv8->debug_base + CPUV8_DBG_OSLAR, 0);
203 if (retval != ERROR_OK) {
204 LOG_DEBUG("Examine %s failed", "oslock");
205 return retval;
206 }
207
208 /* Clear Sticky Power Down status Bit in PRSR to enable access to
209 the registers in the Core Power Domain */
210 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
211 armv8->debug_base + CPUV8_DBG_PRSR, &dummy);
212 if (retval != ERROR_OK)
213 return retval;
214
215 /*
216 * Static CTI configuration:
217 * Channel 0 -> trigger outputs HALT request to PE
218 * Channel 1 -> trigger outputs Resume request to PE
219 * Gate all channel trigger events from entering the CTM
220 */
221
222 /* Enable CTI */
223 retval = arm_cti_enable(armv8->cti, true);
224 /* By default, gate all channel events to and from the CTM */
225 if (retval == ERROR_OK)
226 retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
227 /* output halt requests to PE on channel 0 event */
228 if (retval == ERROR_OK)
229 retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN0, CTI_CHNL(0));
230 /* output restart requests to PE on channel 1 event */
231 if (retval == ERROR_OK)
232 retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN1, CTI_CHNL(1));
233 if (retval != ERROR_OK)
234 return retval;
235
236 /* Resync breakpoint registers */
237
238 return ERROR_OK;
239 }
240
241 /* Write to memory mapped registers directly with no cache or mmu handling */
242 static int aarch64_dap_write_memap_register_u32(struct target *target,
243 uint32_t address,
244 uint32_t value)
245 {
246 int retval;
247 struct armv8_common *armv8 = target_to_armv8(target);
248
249 retval = mem_ap_write_atomic_u32(armv8->debug_ap, address, value);
250
251 return retval;
252 }
253
254 static int aarch64_dpm_setup(struct aarch64_common *a8, uint64_t debug)
255 {
256 struct arm_dpm *dpm = &a8->armv8_common.dpm;
257 int retval;
258
259 dpm->arm = &a8->armv8_common.arm;
260 dpm->didr = debug;
261
262 retval = armv8_dpm_setup(dpm);
263 if (retval == ERROR_OK)
264 retval = armv8_dpm_initialize(dpm);
265
266 return retval;
267 }
268
269 static int aarch64_set_dscr_bits(struct target *target, unsigned long bit_mask, unsigned long value)
270 {
271 struct armv8_common *armv8 = target_to_armv8(target);
272 return armv8_set_dbgreg_bits(armv8, CPUV8_DBG_DSCR, bit_mask, value);
273 }
274
275 static int aarch64_check_state_one(struct target *target,
276 uint32_t mask, uint32_t val, int *p_result, uint32_t *p_prsr)
277 {
278 struct armv8_common *armv8 = target_to_armv8(target);
279 uint32_t prsr;
280 int retval;
281
282 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
283 armv8->debug_base + CPUV8_DBG_PRSR, &prsr);
284 if (retval != ERROR_OK)
285 return retval;
286
287 if (p_prsr)
288 *p_prsr = prsr;
289
290 if (p_result)
291 *p_result = (prsr & mask) == (val & mask);
292
293 return ERROR_OK;
294 }
295
296 static int aarch64_wait_halt_one(struct target *target)
297 {
298 int retval = ERROR_OK;
299 uint32_t prsr;
300
301 int64_t then = timeval_ms();
302 for (;;) {
303 int halted;
304
305 retval = aarch64_check_state_one(target, PRSR_HALT, PRSR_HALT, &halted, &prsr);
306 if (retval != ERROR_OK || halted)
307 break;
308
309 if (timeval_ms() > then + 1000) {
310 retval = ERROR_TARGET_TIMEOUT;
311 LOG_DEBUG("target %s timeout, prsr=0x%08"PRIx32, target_name(target), prsr);
312 break;
313 }
314 }
315 return retval;
316 }
317
318 static int aarch64_prepare_halt_smp(struct target *target, bool exc_target, struct target **p_first)
319 {
320 int retval = ERROR_OK;
321 struct target_list *head = target->head;
322 struct target *first = NULL;
323
324 LOG_DEBUG("target %s exc %i", target_name(target), exc_target);
325
326 while (head != NULL) {
327 struct target *curr = head->target;
328 struct armv8_common *armv8 = target_to_armv8(curr);
329 head = head->next;
330
331 if (exc_target && curr == target)
332 continue;
333 if (!target_was_examined(curr))
334 continue;
335 if (curr->state != TARGET_RUNNING)
336 continue;
337
338 /* HACK: mark this target as prepared for halting */
339 curr->debug_reason = DBG_REASON_DBGRQ;
340
341 /* open the gate for channel 0 to let HALT requests pass to the CTM */
342 retval = arm_cti_ungate_channel(armv8->cti, 0);
343 if (retval == ERROR_OK)
344 retval = aarch64_set_dscr_bits(curr, DSCR_HDE, DSCR_HDE);
345 if (retval != ERROR_OK)
346 break;
347
348 LOG_DEBUG("target %s prepared", target_name(curr));
349
350 if (first == NULL)
351 first = curr;
352 }
353
354 if (p_first) {
355 if (exc_target && first)
356 *p_first = first;
357 else
358 *p_first = target;
359 }
360
361 return retval;
362 }
363
364 static int aarch64_halt_one(struct target *target, enum halt_mode mode)
365 {
366 int retval = ERROR_OK;
367 struct armv8_common *armv8 = target_to_armv8(target);
368
369 LOG_DEBUG("%s", target_name(target));
370
371 /* allow Halting Debug Mode */
372 retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
373 if (retval != ERROR_OK)
374 return retval;
375
376 /* trigger an event on channel 0, this outputs a halt request to the PE */
377 retval = arm_cti_pulse_channel(armv8->cti, 0);
378 if (retval != ERROR_OK)
379 return retval;
380
381 if (mode == HALT_SYNC) {
382 retval = aarch64_wait_halt_one(target);
383 if (retval != ERROR_OK) {
384 if (retval == ERROR_TARGET_TIMEOUT)
385 LOG_ERROR("Timeout waiting for target %s halt", target_name(target));
386 return retval;
387 }
388 }
389
390 return ERROR_OK;
391 }
392
393 static int aarch64_halt_smp(struct target *target, bool exc_target)
394 {
395 struct target *next = target;
396 int retval;
397
398 /* prepare halt on all PEs of the group */
399 retval = aarch64_prepare_halt_smp(target, exc_target, &next);
400
401 if (exc_target && next == target)
402 return retval;
403
404 /* halt the target PE */
405 if (retval == ERROR_OK)
406 retval = aarch64_halt_one(next, HALT_LAZY);
407
408 if (retval != ERROR_OK)
409 return retval;
410
411 /* wait for all PEs to halt */
412 int64_t then = timeval_ms();
413 for (;;) {
414 bool all_halted = true;
415 struct target_list *head;
416 struct target *curr;
417
418 foreach_smp_target(head, target->head) {
419 int halted;
420
421 curr = head->target;
422
423 if (!target_was_examined(curr))
424 continue;
425
426 retval = aarch64_check_state_one(curr, PRSR_HALT, PRSR_HALT, &halted, NULL);
427 if (retval != ERROR_OK || !halted) {
428 all_halted = false;
429 break;
430 }
431 }
432
433 if (all_halted)
434 break;
435
436 if (timeval_ms() > then + 1000) {
437 retval = ERROR_TARGET_TIMEOUT;
438 break;
439 }
440
441 /*
442 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
443 * and it looks like the CTI's are not connected by a common
444 * trigger matrix. It seems that we need to halt one core in each
445 * cluster explicitly. So if we find that a core has not halted
446 * yet, we trigger an explicit halt for the second cluster.
447 */
448 retval = aarch64_halt_one(curr, HALT_LAZY);
449 if (retval != ERROR_OK)
450 break;
451 }
452
453 return retval;
454 }
455
456 static int update_halt_gdb(struct target *target, enum target_debug_reason debug_reason)
457 {
458 struct target *gdb_target = NULL;
459 struct target_list *head;
460 struct target *curr;
461
462 if (debug_reason == DBG_REASON_NOTHALTED) {
463 LOG_DEBUG("Halting remaining targets in SMP group");
464 aarch64_halt_smp(target, true);
465 }
466
467 /* poll all targets in the group, but skip the target that serves GDB */
468 foreach_smp_target(head, target->head) {
469 curr = head->target;
470 /* skip calling context */
471 if (curr == target)
472 continue;
473 if (!target_was_examined(curr))
474 continue;
475 /* skip targets that were already halted */
476 if (curr->state == TARGET_HALTED)
477 continue;
478 /* remember the gdb_service->target */
479 if (curr->gdb_service != NULL)
480 gdb_target = curr->gdb_service->target;
481 /* skip it */
482 if (curr == gdb_target)
483 continue;
484
485 /* avoid recursion in aarch64_poll() */
486 curr->smp = 0;
487 aarch64_poll(curr);
488 curr->smp = 1;
489 }
490
491 /* after all targets were updated, poll the gdb serving target */
492 if (gdb_target != NULL && gdb_target != target)
493 aarch64_poll(gdb_target);
494
495 return ERROR_OK;
496 }
497
498 /*
499 * Aarch64 Run control
500 */
501
502 static int aarch64_poll(struct target *target)
503 {
504 enum target_state prev_target_state;
505 int retval = ERROR_OK;
506 int halted;
507
508 retval = aarch64_check_state_one(target,
509 PRSR_HALT, PRSR_HALT, &halted, NULL);
510 if (retval != ERROR_OK)
511 return retval;
512
513 if (halted) {
514 prev_target_state = target->state;
515 if (prev_target_state != TARGET_HALTED) {
516 enum target_debug_reason debug_reason = target->debug_reason;
517
518 /* We have a halting debug event */
519 target->state = TARGET_HALTED;
520 LOG_DEBUG("Target %s halted", target_name(target));
521 retval = aarch64_debug_entry(target);
522 if (retval != ERROR_OK)
523 return retval;
524
525 if (target->smp)
526 update_halt_gdb(target, debug_reason);
527
528 if (arm_semihosting(target, &retval) != 0)
529 return retval;
530
531 switch (prev_target_state) {
532 case TARGET_RUNNING:
533 case TARGET_UNKNOWN:
534 case TARGET_RESET:
535 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
536 break;
537 case TARGET_DEBUG_RUNNING:
538 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
539 break;
540 default:
541 break;
542 }
543 }
544 } else
545 target->state = TARGET_RUNNING;
546
547 return retval;
548 }
549
550 static int aarch64_halt(struct target *target)
551 {
552 struct armv8_common *armv8 = target_to_armv8(target);
553 armv8->last_run_control_op = ARMV8_RUNCONTROL_HALT;
554
555 if (target->smp)
556 return aarch64_halt_smp(target, false);
557
558 return aarch64_halt_one(target, HALT_SYNC);
559 }
560
561 static int aarch64_restore_one(struct target *target, int current,
562 uint64_t *address, int handle_breakpoints, int debug_execution)
563 {
564 struct armv8_common *armv8 = target_to_armv8(target);
565 struct arm *arm = &armv8->arm;
566 int retval;
567 uint64_t resume_pc;
568
569 LOG_DEBUG("%s", target_name(target));
570
571 if (!debug_execution)
572 target_free_all_working_areas(target);
573
574 /* current = 1: continue on current pc, otherwise continue at <address> */
575 resume_pc = buf_get_u64(arm->pc->value, 0, 64);
576 if (!current)
577 resume_pc = *address;
578 else
579 *address = resume_pc;
580
581 /* Make sure that the Armv7 gdb thumb fixups does not
582 * kill the return address
583 */
584 switch (arm->core_state) {
585 case ARM_STATE_ARM:
586 resume_pc &= 0xFFFFFFFC;
587 break;
588 case ARM_STATE_AARCH64:
589 resume_pc &= 0xFFFFFFFFFFFFFFFC;
590 break;
591 case ARM_STATE_THUMB:
592 case ARM_STATE_THUMB_EE:
593 /* When the return address is loaded into PC
594 * bit 0 must be 1 to stay in Thumb state
595 */
596 resume_pc |= 0x1;
597 break;
598 case ARM_STATE_JAZELLE:
599 LOG_ERROR("How do I resume into Jazelle state??");
600 return ERROR_FAIL;
601 }
602 LOG_DEBUG("resume pc = 0x%016" PRIx64, resume_pc);
603 buf_set_u64(arm->pc->value, 0, 64, resume_pc);
604 arm->pc->dirty = true;
605 arm->pc->valid = true;
606
607 /* called it now before restoring context because it uses cpu
608 * register r0 for restoring system control register */
609 retval = aarch64_restore_system_control_reg(target);
610 if (retval == ERROR_OK)
611 retval = aarch64_restore_context(target, handle_breakpoints);
612
613 return retval;
614 }
615
616 /**
617 * prepare single target for restart
618 *
619 *
620 */
621 static int aarch64_prepare_restart_one(struct target *target)
622 {
623 struct armv8_common *armv8 = target_to_armv8(target);
624 int retval;
625 uint32_t dscr;
626 uint32_t tmp;
627
628 LOG_DEBUG("%s", target_name(target));
629
630 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
631 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
632 if (retval != ERROR_OK)
633 return retval;
634
635 if ((dscr & DSCR_ITE) == 0)
636 LOG_ERROR("DSCR.ITE must be set before leaving debug!");
637 if ((dscr & DSCR_ERR) != 0)
638 LOG_ERROR("DSCR.ERR must be cleared before leaving debug!");
639
640 /* acknowledge a pending CTI halt event */
641 retval = arm_cti_ack_events(armv8->cti, CTI_TRIG(HALT));
642 /*
643 * open the CTI gate for channel 1 so that the restart events
644 * get passed along to all PEs. Also close gate for channel 0
645 * to isolate the PE from halt events.
646 */
647 if (retval == ERROR_OK)
648 retval = arm_cti_ungate_channel(armv8->cti, 1);
649 if (retval == ERROR_OK)
650 retval = arm_cti_gate_channel(armv8->cti, 0);
651
652 /* make sure that DSCR.HDE is set */
653 if (retval == ERROR_OK) {
654 dscr |= DSCR_HDE;
655 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
656 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
657 }
658
659 if (retval == ERROR_OK) {
660 /* clear sticky bits in PRSR, SDR is now 0 */
661 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
662 armv8->debug_base + CPUV8_DBG_PRSR, &tmp);
663 }
664
665 return retval;
666 }
667
668 static int aarch64_do_restart_one(struct target *target, enum restart_mode mode)
669 {
670 struct armv8_common *armv8 = target_to_armv8(target);
671 int retval;
672
673 LOG_DEBUG("%s", target_name(target));
674
675 /* trigger an event on channel 1, generates a restart request to the PE */
676 retval = arm_cti_pulse_channel(armv8->cti, 1);
677 if (retval != ERROR_OK)
678 return retval;
679
680 if (mode == RESTART_SYNC) {
681 int64_t then = timeval_ms();
682 for (;;) {
683 int resumed;
684 /*
685 * if PRSR.SDR is set now, the target did restart, even
686 * if it's now already halted again (e.g. due to breakpoint)
687 */
688 retval = aarch64_check_state_one(target,
689 PRSR_SDR, PRSR_SDR, &resumed, NULL);
690 if (retval != ERROR_OK || resumed)
691 break;
692
693 if (timeval_ms() > then + 1000) {
694 LOG_ERROR("%s: Timeout waiting for resume"PRIx32, target_name(target));
695 retval = ERROR_TARGET_TIMEOUT;
696 break;
697 }
698 }
699 }
700
701 if (retval != ERROR_OK)
702 return retval;
703
704 target->debug_reason = DBG_REASON_NOTHALTED;
705 target->state = TARGET_RUNNING;
706
707 return ERROR_OK;
708 }
709
710 static int aarch64_restart_one(struct target *target, enum restart_mode mode)
711 {
712 int retval;
713
714 LOG_DEBUG("%s", target_name(target));
715
716 retval = aarch64_prepare_restart_one(target);
717 if (retval == ERROR_OK)
718 retval = aarch64_do_restart_one(target, mode);
719
720 return retval;
721 }
722
723 /*
724 * prepare all but the current target for restart
725 */
726 static int aarch64_prep_restart_smp(struct target *target, int handle_breakpoints, struct target **p_first)
727 {
728 int retval = ERROR_OK;
729 struct target_list *head;
730 struct target *first = NULL;
731 uint64_t address;
732
733 foreach_smp_target(head, target->head) {
734 struct target *curr = head->target;
735
736 /* skip calling target */
737 if (curr == target)
738 continue;
739 if (!target_was_examined(curr))
740 continue;
741 if (curr->state != TARGET_HALTED)
742 continue;
743
744 /* resume at current address, not in step mode */
745 retval = aarch64_restore_one(curr, 1, &address, handle_breakpoints, 0);
746 if (retval == ERROR_OK)
747 retval = aarch64_prepare_restart_one(curr);
748 if (retval != ERROR_OK) {
749 LOG_ERROR("failed to restore target %s", target_name(curr));
750 break;
751 }
752 /* remember the first valid target in the group */
753 if (first == NULL)
754 first = curr;
755 }
756
757 if (p_first)
758 *p_first = first;
759
760 return retval;
761 }
762
763
764 static int aarch64_step_restart_smp(struct target *target)
765 {
766 int retval = ERROR_OK;
767 struct target_list *head;
768 struct target *first = NULL;
769
770 LOG_DEBUG("%s", target_name(target));
771
772 retval = aarch64_prep_restart_smp(target, 0, &first);
773 if (retval != ERROR_OK)
774 return retval;
775
776 if (first != NULL)
777 retval = aarch64_do_restart_one(first, RESTART_LAZY);
778 if (retval != ERROR_OK) {
779 LOG_DEBUG("error restarting target %s", target_name(first));
780 return retval;
781 }
782
783 int64_t then = timeval_ms();
784 for (;;) {
785 struct target *curr = target;
786 bool all_resumed = true;
787
788 foreach_smp_target(head, target->head) {
789 uint32_t prsr;
790 int resumed;
791
792 curr = head->target;
793
794 if (curr == target)
795 continue;
796
797 if (!target_was_examined(curr))
798 continue;
799
800 retval = aarch64_check_state_one(curr,
801 PRSR_SDR, PRSR_SDR, &resumed, &prsr);
802 if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
803 all_resumed = false;
804 break;
805 }
806
807 if (curr->state != TARGET_RUNNING) {
808 curr->state = TARGET_RUNNING;
809 curr->debug_reason = DBG_REASON_NOTHALTED;
810 target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
811 }
812 }
813
814 if (all_resumed)
815 break;
816
817 if (timeval_ms() > then + 1000) {
818 LOG_ERROR("%s: timeout waiting for target resume", __func__);
819 retval = ERROR_TARGET_TIMEOUT;
820 break;
821 }
822 /*
823 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
824 * and it looks like the CTI's are not connected by a common
825 * trigger matrix. It seems that we need to halt one core in each
826 * cluster explicitly. So if we find that a core has not halted
827 * yet, we trigger an explicit resume for the second cluster.
828 */
829 retval = aarch64_do_restart_one(curr, RESTART_LAZY);
830 if (retval != ERROR_OK)
831 break;
832 }
833
834 return retval;
835 }
836
837 static int aarch64_resume(struct target *target, int current,
838 target_addr_t address, int handle_breakpoints, int debug_execution)
839 {
840 int retval = 0;
841 uint64_t addr = address;
842
843 struct armv8_common *armv8 = target_to_armv8(target);
844 armv8->last_run_control_op = ARMV8_RUNCONTROL_RESUME;
845
846 if (target->state != TARGET_HALTED)
847 return ERROR_TARGET_NOT_HALTED;
848
849 /*
850 * If this target is part of a SMP group, prepare the others
851 * targets for resuming. This involves restoring the complete
852 * target register context and setting up CTI gates to accept
853 * resume events from the trigger matrix.
854 */
855 if (target->smp) {
856 retval = aarch64_prep_restart_smp(target, handle_breakpoints, NULL);
857 if (retval != ERROR_OK)
858 return retval;
859 }
860
861 /* all targets prepared, restore and restart the current target */
862 retval = aarch64_restore_one(target, current, &addr, handle_breakpoints,
863 debug_execution);
864 if (retval == ERROR_OK)
865 retval = aarch64_restart_one(target, RESTART_SYNC);
866 if (retval != ERROR_OK)
867 return retval;
868
869 if (target->smp) {
870 int64_t then = timeval_ms();
871 for (;;) {
872 struct target *curr = target;
873 struct target_list *head;
874 bool all_resumed = true;
875
876 foreach_smp_target(head, target->head) {
877 uint32_t prsr;
878 int resumed;
879
880 curr = head->target;
881 if (curr == target)
882 continue;
883 if (!target_was_examined(curr))
884 continue;
885
886 retval = aarch64_check_state_one(curr,
887 PRSR_SDR, PRSR_SDR, &resumed, &prsr);
888 if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
889 all_resumed = false;
890 break;
891 }
892
893 if (curr->state != TARGET_RUNNING) {
894 curr->state = TARGET_RUNNING;
895 curr->debug_reason = DBG_REASON_NOTHALTED;
896 target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
897 }
898 }
899
900 if (all_resumed)
901 break;
902
903 if (timeval_ms() > then + 1000) {
904 LOG_ERROR("%s: timeout waiting for target %s to resume", __func__, target_name(curr));
905 retval = ERROR_TARGET_TIMEOUT;
906 break;
907 }
908
909 /*
910 * HACK: on Hi6220 there are 8 cores organized in 2 clusters
911 * and it looks like the CTI's are not connected by a common
912 * trigger matrix. It seems that we need to halt one core in each
913 * cluster explicitly. So if we find that a core has not halted
914 * yet, we trigger an explicit resume for the second cluster.
915 */
916 retval = aarch64_do_restart_one(curr, RESTART_LAZY);
917 if (retval != ERROR_OK)
918 break;
919 }
920 }
921
922 if (retval != ERROR_OK)
923 return retval;
924
925 target->debug_reason = DBG_REASON_NOTHALTED;
926
927 if (!debug_execution) {
928 target->state = TARGET_RUNNING;
929 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
930 LOG_DEBUG("target resumed at 0x%" PRIx64, addr);
931 } else {
932 target->state = TARGET_DEBUG_RUNNING;
933 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
934 LOG_DEBUG("target debug resumed at 0x%" PRIx64, addr);
935 }
936
937 return ERROR_OK;
938 }
939
940 static int aarch64_debug_entry(struct target *target)
941 {
942 int retval = ERROR_OK;
943 struct armv8_common *armv8 = target_to_armv8(target);
944 struct arm_dpm *dpm = &armv8->dpm;
945 enum arm_state core_state;
946 uint32_t dscr;
947
948 /* make sure to clear all sticky errors */
949 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
950 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
951 if (retval == ERROR_OK)
952 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
953 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
954 if (retval == ERROR_OK)
955 retval = arm_cti_ack_events(armv8->cti, CTI_TRIG(HALT));
956
957 if (retval != ERROR_OK)
958 return retval;
959
960 LOG_DEBUG("%s dscr = 0x%08" PRIx32, target_name(target), dscr);
961
962 dpm->dscr = dscr;
963 core_state = armv8_dpm_get_core_state(dpm);
964 armv8_select_opcodes(armv8, core_state == ARM_STATE_AARCH64);
965 armv8_select_reg_access(armv8, core_state == ARM_STATE_AARCH64);
966
967 /* close the CTI gate for all events */
968 if (retval == ERROR_OK)
969 retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
970 /* discard async exceptions */
971 if (retval == ERROR_OK)
972 retval = dpm->instr_cpsr_sync(dpm);
973 if (retval != ERROR_OK)
974 return retval;
975
976 /* Examine debug reason */
977 armv8_dpm_report_dscr(dpm, dscr);
978
979 /* save address of instruction that triggered the watchpoint? */
980 if (target->debug_reason == DBG_REASON_WATCHPOINT) {
981 uint32_t tmp;
982 uint64_t wfar = 0;
983
984 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
985 armv8->debug_base + CPUV8_DBG_WFAR1,
986 &tmp);
987 if (retval != ERROR_OK)
988 return retval;
989 wfar = tmp;
990 wfar = (wfar << 32);
991 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
992 armv8->debug_base + CPUV8_DBG_WFAR0,
993 &tmp);
994 if (retval != ERROR_OK)
995 return retval;
996 wfar |= tmp;
997 armv8_dpm_report_wfar(&armv8->dpm, wfar);
998 }
999
1000 retval = armv8_dpm_read_current_registers(&armv8->dpm);
1001
1002 if (retval == ERROR_OK && armv8->post_debug_entry)
1003 retval = armv8->post_debug_entry(target);
1004
1005 return retval;
1006 }
1007
1008 static int aarch64_post_debug_entry(struct target *target)
1009 {
1010 struct aarch64_common *aarch64 = target_to_aarch64(target);
1011 struct armv8_common *armv8 = &aarch64->armv8_common;
1012 int retval;
1013 enum arm_mode target_mode = ARM_MODE_ANY;
1014 uint32_t instr;
1015
1016 switch (armv8->arm.core_mode) {
1017 case ARMV8_64_EL0T:
1018 target_mode = ARMV8_64_EL1H;
1019 /* fall through */
1020 case ARMV8_64_EL1T:
1021 case ARMV8_64_EL1H:
1022 instr = ARMV8_MRS(SYSTEM_SCTLR_EL1, 0);
1023 break;
1024 case ARMV8_64_EL2T:
1025 case ARMV8_64_EL2H:
1026 instr = ARMV8_MRS(SYSTEM_SCTLR_EL2, 0);
1027 break;
1028 case ARMV8_64_EL3H:
1029 case ARMV8_64_EL3T:
1030 instr = ARMV8_MRS(SYSTEM_SCTLR_EL3, 0);
1031 break;
1032
1033 case ARM_MODE_SVC:
1034 case ARM_MODE_ABT:
1035 case ARM_MODE_FIQ:
1036 case ARM_MODE_IRQ:
1037 case ARM_MODE_SYS:
1038 instr = ARMV4_5_MRC(15, 0, 0, 1, 0, 0);
1039 break;
1040
1041 default:
1042 LOG_INFO("cannot read system control register in this mode");
1043 return ERROR_FAIL;
1044 }
1045
1046 if (target_mode != ARM_MODE_ANY)
1047 armv8_dpm_modeswitch(&armv8->dpm, target_mode);
1048
1049 retval = armv8->dpm.instr_read_data_r0(&armv8->dpm, instr, &aarch64->system_control_reg);
1050 if (retval != ERROR_OK)
1051 return retval;
1052
1053 if (target_mode != ARM_MODE_ANY)
1054 armv8_dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
1055
1056 LOG_DEBUG("System_register: %8.8" PRIx32, aarch64->system_control_reg);
1057 aarch64->system_control_reg_curr = aarch64->system_control_reg;
1058
1059 if (armv8->armv8_mmu.armv8_cache.info == -1) {
1060 armv8_identify_cache(armv8);
1061 armv8_read_mpidr(armv8);
1062 }
1063
1064 armv8->armv8_mmu.mmu_enabled =
1065 (aarch64->system_control_reg & 0x1U) ? 1 : 0;
1066 armv8->armv8_mmu.armv8_cache.d_u_cache_enabled =
1067 (aarch64->system_control_reg & 0x4U) ? 1 : 0;
1068 armv8->armv8_mmu.armv8_cache.i_cache_enabled =
1069 (aarch64->system_control_reg & 0x1000U) ? 1 : 0;
1070 return ERROR_OK;
1071 }
1072
1073 /*
1074 * single-step a target
1075 */
1076 static int aarch64_step(struct target *target, int current, target_addr_t address,
1077 int handle_breakpoints)
1078 {
1079 struct armv8_common *armv8 = target_to_armv8(target);
1080 struct aarch64_common *aarch64 = target_to_aarch64(target);
1081 int saved_retval = ERROR_OK;
1082 int retval;
1083 uint32_t edecr;
1084
1085 armv8->last_run_control_op = ARMV8_RUNCONTROL_STEP;
1086
1087 if (target->state != TARGET_HALTED) {
1088 LOG_WARNING("target not halted");
1089 return ERROR_TARGET_NOT_HALTED;
1090 }
1091
1092 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1093 armv8->debug_base + CPUV8_DBG_EDECR, &edecr);
1094 /* make sure EDECR.SS is not set when restoring the register */
1095
1096 if (retval == ERROR_OK) {
1097 edecr &= ~0x4;
1098 /* set EDECR.SS to enter hardware step mode */
1099 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1100 armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4));
1101 }
1102 /* disable interrupts while stepping */
1103 if (retval == ERROR_OK && aarch64->isrmasking_mode == AARCH64_ISRMASK_ON)
1104 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0x3 << 22);
1105 /* bail out if stepping setup has failed */
1106 if (retval != ERROR_OK)
1107 return retval;
1108
1109 if (target->smp && (current == 1)) {
1110 /*
1111 * isolate current target so that it doesn't get resumed
1112 * together with the others
1113 */
1114 retval = arm_cti_gate_channel(armv8->cti, 1);
1115 /* resume all other targets in the group */
1116 if (retval == ERROR_OK)
1117 retval = aarch64_step_restart_smp(target);
1118 if (retval != ERROR_OK) {
1119 LOG_ERROR("Failed to restart non-stepping targets in SMP group");
1120 return retval;
1121 }
1122 LOG_DEBUG("Restarted all non-stepping targets in SMP group");
1123 }
1124
1125 /* all other targets running, restore and restart the current target */
1126 retval = aarch64_restore_one(target, current, &address, 0, 0);
1127 if (retval == ERROR_OK)
1128 retval = aarch64_restart_one(target, RESTART_LAZY);
1129
1130 if (retval != ERROR_OK)
1131 return retval;
1132
1133 LOG_DEBUG("target step-resumed at 0x%" PRIx64, address);
1134 if (!handle_breakpoints)
1135 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1136
1137 int64_t then = timeval_ms();
1138 for (;;) {
1139 int stepped;
1140 uint32_t prsr;
1141
1142 retval = aarch64_check_state_one(target,
1143 PRSR_SDR|PRSR_HALT, PRSR_SDR|PRSR_HALT, &stepped, &prsr);
1144 if (retval != ERROR_OK || stepped)
1145 break;
1146
1147 if (timeval_ms() > then + 100) {
1148 LOG_ERROR("timeout waiting for target %s halt after step",
1149 target_name(target));
1150 retval = ERROR_TARGET_TIMEOUT;
1151 break;
1152 }
1153 }
1154
1155 /*
1156 * At least on one SoC (Renesas R8A7795) stepping over a WFI instruction
1157 * causes a timeout. The core takes the step but doesn't complete it and so
1158 * debug state is never entered. However, you can manually halt the core
1159 * as an external debug even is also a WFI wakeup event.
1160 */
1161 if (retval == ERROR_TARGET_TIMEOUT)
1162 saved_retval = aarch64_halt_one(target, HALT_SYNC);
1163
1164 /* restore EDECR */
1165 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1166 armv8->debug_base + CPUV8_DBG_EDECR, edecr);
1167 if (retval != ERROR_OK)
1168 return retval;
1169
1170 /* restore interrupts */
1171 if (aarch64->isrmasking_mode == AARCH64_ISRMASK_ON) {
1172 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0);
1173 if (retval != ERROR_OK)
1174 return ERROR_OK;
1175 }
1176
1177 if (saved_retval != ERROR_OK)
1178 return saved_retval;
1179
1180 return aarch64_poll(target);
1181 }
1182
1183 static int aarch64_restore_context(struct target *target, bool bpwp)
1184 {
1185 struct armv8_common *armv8 = target_to_armv8(target);
1186 struct arm *arm = &armv8->arm;
1187
1188 int retval;
1189
1190 LOG_DEBUG("%s", target_name(target));
1191
1192 if (armv8->pre_restore_context)
1193 armv8->pre_restore_context(target);
1194
1195 retval = armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
1196 if (retval == ERROR_OK) {
1197 /* registers are now invalid */
1198 register_cache_invalidate(arm->core_cache);
1199 register_cache_invalidate(arm->core_cache->next);
1200 }
1201
1202 return retval;
1203 }
1204
1205 /*
1206 * Cortex-A8 Breakpoint and watchpoint functions
1207 */
1208
1209 /* Setup hardware Breakpoint Register Pair */
1210 static int aarch64_set_breakpoint(struct target *target,
1211 struct breakpoint *breakpoint, uint8_t matchmode)
1212 {
1213 int retval;
1214 int brp_i = 0;
1215 uint32_t control;
1216 uint8_t byte_addr_select = 0x0F;
1217 struct aarch64_common *aarch64 = target_to_aarch64(target);
1218 struct armv8_common *armv8 = &aarch64->armv8_common;
1219 struct aarch64_brp *brp_list = aarch64->brp_list;
1220
1221 if (breakpoint->set) {
1222 LOG_WARNING("breakpoint already set");
1223 return ERROR_OK;
1224 }
1225
1226 if (breakpoint->type == BKPT_HARD) {
1227 int64_t bpt_value;
1228 while (brp_list[brp_i].used && (brp_i < aarch64->brp_num))
1229 brp_i++;
1230 if (brp_i >= aarch64->brp_num) {
1231 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1232 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1233 }
1234 breakpoint->set = brp_i + 1;
1235 if (breakpoint->length == 2)
1236 byte_addr_select = (3 << (breakpoint->address & 0x02));
1237 control = ((matchmode & 0x7) << 20)
1238 | (1 << 13)
1239 | (byte_addr_select << 5)
1240 | (3 << 1) | 1;
1241 brp_list[brp_i].used = 1;
1242 brp_list[brp_i].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1243 brp_list[brp_i].control = control;
1244 bpt_value = brp_list[brp_i].value;
1245
1246 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1247 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1248 (uint32_t)(bpt_value & 0xFFFFFFFF));
1249 if (retval != ERROR_OK)
1250 return retval;
1251 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1252 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1253 (uint32_t)(bpt_value >> 32));
1254 if (retval != ERROR_OK)
1255 return retval;
1256
1257 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1258 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1259 brp_list[brp_i].control);
1260 if (retval != ERROR_OK)
1261 return retval;
1262 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1263 brp_list[brp_i].control,
1264 brp_list[brp_i].value);
1265
1266 } else if (breakpoint->type == BKPT_SOFT) {
1267 uint8_t code[4];
1268
1269 buf_set_u32(code, 0, 32, armv8_opcode(armv8, ARMV8_OPC_HLT));
1270 retval = target_read_memory(target,
1271 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1272 breakpoint->length, 1,
1273 breakpoint->orig_instr);
1274 if (retval != ERROR_OK)
1275 return retval;
1276
1277 armv8_cache_d_inner_flush_virt(armv8,
1278 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1279 breakpoint->length);
1280
1281 retval = target_write_memory(target,
1282 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1283 breakpoint->length, 1, code);
1284 if (retval != ERROR_OK)
1285 return retval;
1286
1287 armv8_cache_d_inner_flush_virt(armv8,
1288 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1289 breakpoint->length);
1290
1291 armv8_cache_i_inner_inval_virt(armv8,
1292 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1293 breakpoint->length);
1294
1295 breakpoint->set = 0x11; /* Any nice value but 0 */
1296 }
1297
1298 /* Ensure that halting debug mode is enable */
1299 retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
1300 if (retval != ERROR_OK) {
1301 LOG_DEBUG("Failed to set DSCR.HDE");
1302 return retval;
1303 }
1304
1305 return ERROR_OK;
1306 }
1307
1308 static int aarch64_set_context_breakpoint(struct target *target,
1309 struct breakpoint *breakpoint, uint8_t matchmode)
1310 {
1311 int retval = ERROR_FAIL;
1312 int brp_i = 0;
1313 uint32_t control;
1314 uint8_t byte_addr_select = 0x0F;
1315 struct aarch64_common *aarch64 = target_to_aarch64(target);
1316 struct armv8_common *armv8 = &aarch64->armv8_common;
1317 struct aarch64_brp *brp_list = aarch64->brp_list;
1318
1319 if (breakpoint->set) {
1320 LOG_WARNING("breakpoint already set");
1321 return retval;
1322 }
1323 /*check available context BRPs*/
1324 while ((brp_list[brp_i].used ||
1325 (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < aarch64->brp_num))
1326 brp_i++;
1327
1328 if (brp_i >= aarch64->brp_num) {
1329 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1330 return ERROR_FAIL;
1331 }
1332
1333 breakpoint->set = brp_i + 1;
1334 control = ((matchmode & 0x7) << 20)
1335 | (1 << 13)
1336 | (byte_addr_select << 5)
1337 | (3 << 1) | 1;
1338 brp_list[brp_i].used = 1;
1339 brp_list[brp_i].value = (breakpoint->asid);
1340 brp_list[brp_i].control = control;
1341 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1342 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1343 brp_list[brp_i].value);
1344 if (retval != ERROR_OK)
1345 return retval;
1346 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1347 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1348 brp_list[brp_i].control);
1349 if (retval != ERROR_OK)
1350 return retval;
1351 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1352 brp_list[brp_i].control,
1353 brp_list[brp_i].value);
1354 return ERROR_OK;
1355
1356 }
1357
1358 static int aarch64_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
1359 {
1360 int retval = ERROR_FAIL;
1361 int brp_1 = 0; /* holds the contextID pair */
1362 int brp_2 = 0; /* holds the IVA pair */
1363 uint32_t control_CTX, control_IVA;
1364 uint8_t CTX_byte_addr_select = 0x0F;
1365 uint8_t IVA_byte_addr_select = 0x0F;
1366 uint8_t CTX_machmode = 0x03;
1367 uint8_t IVA_machmode = 0x01;
1368 struct aarch64_common *aarch64 = target_to_aarch64(target);
1369 struct armv8_common *armv8 = &aarch64->armv8_common;
1370 struct aarch64_brp *brp_list = aarch64->brp_list;
1371
1372 if (breakpoint->set) {
1373 LOG_WARNING("breakpoint already set");
1374 return retval;
1375 }
1376 /*check available context BRPs*/
1377 while ((brp_list[brp_1].used ||
1378 (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < aarch64->brp_num))
1379 brp_1++;
1380
1381 printf("brp(CTX) found num: %d\n", brp_1);
1382 if (brp_1 >= aarch64->brp_num) {
1383 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1384 return ERROR_FAIL;
1385 }
1386
1387 while ((brp_list[brp_2].used ||
1388 (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < aarch64->brp_num))
1389 brp_2++;
1390
1391 printf("brp(IVA) found num: %d\n", brp_2);
1392 if (brp_2 >= aarch64->brp_num) {
1393 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1394 return ERROR_FAIL;
1395 }
1396
1397 breakpoint->set = brp_1 + 1;
1398 breakpoint->linked_BRP = brp_2;
1399 control_CTX = ((CTX_machmode & 0x7) << 20)
1400 | (brp_2 << 16)
1401 | (0 << 14)
1402 | (CTX_byte_addr_select << 5)
1403 | (3 << 1) | 1;
1404 brp_list[brp_1].used = 1;
1405 brp_list[brp_1].value = (breakpoint->asid);
1406 brp_list[brp_1].control = control_CTX;
1407 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1408 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_1].BRPn,
1409 brp_list[brp_1].value);
1410 if (retval != ERROR_OK)
1411 return retval;
1412 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1413 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_1].BRPn,
1414 brp_list[brp_1].control);
1415 if (retval != ERROR_OK)
1416 return retval;
1417
1418 control_IVA = ((IVA_machmode & 0x7) << 20)
1419 | (brp_1 << 16)
1420 | (1 << 13)
1421 | (IVA_byte_addr_select << 5)
1422 | (3 << 1) | 1;
1423 brp_list[brp_2].used = 1;
1424 brp_list[brp_2].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1425 brp_list[brp_2].control = control_IVA;
1426 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1427 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_2].BRPn,
1428 brp_list[brp_2].value & 0xFFFFFFFF);
1429 if (retval != ERROR_OK)
1430 return retval;
1431 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1432 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_2].BRPn,
1433 brp_list[brp_2].value >> 32);
1434 if (retval != ERROR_OK)
1435 return retval;
1436 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1437 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_2].BRPn,
1438 brp_list[brp_2].control);
1439 if (retval != ERROR_OK)
1440 return retval;
1441
1442 return ERROR_OK;
1443 }
1444
1445 static int aarch64_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1446 {
1447 int retval;
1448 struct aarch64_common *aarch64 = target_to_aarch64(target);
1449 struct armv8_common *armv8 = &aarch64->armv8_common;
1450 struct aarch64_brp *brp_list = aarch64->brp_list;
1451
1452 if (!breakpoint->set) {
1453 LOG_WARNING("breakpoint not set");
1454 return ERROR_OK;
1455 }
1456
1457 if (breakpoint->type == BKPT_HARD) {
1458 if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
1459 int brp_i = breakpoint->set - 1;
1460 int brp_j = breakpoint->linked_BRP;
1461 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1462 LOG_DEBUG("Invalid BRP number in breakpoint");
1463 return ERROR_OK;
1464 }
1465 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1466 brp_list[brp_i].control, brp_list[brp_i].value);
1467 brp_list[brp_i].used = 0;
1468 brp_list[brp_i].value = 0;
1469 brp_list[brp_i].control = 0;
1470 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1471 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1472 brp_list[brp_i].control);
1473 if (retval != ERROR_OK)
1474 return retval;
1475 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1476 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1477 (uint32_t)brp_list[brp_i].value);
1478 if (retval != ERROR_OK)
1479 return retval;
1480 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1481 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1482 (uint32_t)brp_list[brp_i].value);
1483 if (retval != ERROR_OK)
1484 return retval;
1485 if ((brp_j < 0) || (brp_j >= aarch64->brp_num)) {
1486 LOG_DEBUG("Invalid BRP number in breakpoint");
1487 return ERROR_OK;
1488 }
1489 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_j,
1490 brp_list[brp_j].control, brp_list[brp_j].value);
1491 brp_list[brp_j].used = 0;
1492 brp_list[brp_j].value = 0;
1493 brp_list[brp_j].control = 0;
1494 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1495 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_j].BRPn,
1496 brp_list[brp_j].control);
1497 if (retval != ERROR_OK)
1498 return retval;
1499 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1500 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_j].BRPn,
1501 (uint32_t)brp_list[brp_j].value);
1502 if (retval != ERROR_OK)
1503 return retval;
1504 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1505 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_j].BRPn,
1506 (uint32_t)brp_list[brp_j].value);
1507 if (retval != ERROR_OK)
1508 return retval;
1509
1510 breakpoint->linked_BRP = 0;
1511 breakpoint->set = 0;
1512 return ERROR_OK;
1513
1514 } else {
1515 int brp_i = breakpoint->set - 1;
1516 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1517 LOG_DEBUG("Invalid BRP number in breakpoint");
1518 return ERROR_OK;
1519 }
1520 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_i,
1521 brp_list[brp_i].control, brp_list[brp_i].value);
1522 brp_list[brp_i].used = 0;
1523 brp_list[brp_i].value = 0;
1524 brp_list[brp_i].control = 0;
1525 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1526 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1527 brp_list[brp_i].control);
1528 if (retval != ERROR_OK)
1529 return retval;
1530 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1531 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1532 brp_list[brp_i].value);
1533 if (retval != ERROR_OK)
1534 return retval;
1535
1536 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1537 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1538 (uint32_t)brp_list[brp_i].value);
1539 if (retval != ERROR_OK)
1540 return retval;
1541 breakpoint->set = 0;
1542 return ERROR_OK;
1543 }
1544 } else {
1545 /* restore original instruction (kept in target endianness) */
1546
1547 armv8_cache_d_inner_flush_virt(armv8,
1548 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1549 breakpoint->length);
1550
1551 if (breakpoint->length == 4) {
1552 retval = target_write_memory(target,
1553 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1554 4, 1, breakpoint->orig_instr);
1555 if (retval != ERROR_OK)
1556 return retval;
1557 } else {
1558 retval = target_write_memory(target,
1559 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1560 2, 1, breakpoint->orig_instr);
1561 if (retval != ERROR_OK)
1562 return retval;
1563 }
1564
1565 armv8_cache_d_inner_flush_virt(armv8,
1566 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1567 breakpoint->length);
1568
1569 armv8_cache_i_inner_inval_virt(armv8,
1570 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1571 breakpoint->length);
1572 }
1573 breakpoint->set = 0;
1574
1575 return ERROR_OK;
1576 }
1577
1578 static int aarch64_add_breakpoint(struct target *target,
1579 struct breakpoint *breakpoint)
1580 {
1581 struct aarch64_common *aarch64 = target_to_aarch64(target);
1582
1583 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1584 LOG_INFO("no hardware breakpoint available");
1585 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1586 }
1587
1588 if (breakpoint->type == BKPT_HARD)
1589 aarch64->brp_num_available--;
1590
1591 return aarch64_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1592 }
1593
1594 static int aarch64_add_context_breakpoint(struct target *target,
1595 struct breakpoint *breakpoint)
1596 {
1597 struct aarch64_common *aarch64 = target_to_aarch64(target);
1598
1599 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1600 LOG_INFO("no hardware breakpoint available");
1601 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1602 }
1603
1604 if (breakpoint->type == BKPT_HARD)
1605 aarch64->brp_num_available--;
1606
1607 return aarch64_set_context_breakpoint(target, breakpoint, 0x02); /* asid match */
1608 }
1609
1610 static int aarch64_add_hybrid_breakpoint(struct target *target,
1611 struct breakpoint *breakpoint)
1612 {
1613 struct aarch64_common *aarch64 = target_to_aarch64(target);
1614
1615 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1616 LOG_INFO("no hardware breakpoint available");
1617 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1618 }
1619
1620 if (breakpoint->type == BKPT_HARD)
1621 aarch64->brp_num_available--;
1622
1623 return aarch64_set_hybrid_breakpoint(target, breakpoint); /* ??? */
1624 }
1625
1626
1627 static int aarch64_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1628 {
1629 struct aarch64_common *aarch64 = target_to_aarch64(target);
1630
1631 #if 0
1632 /* It is perfectly possible to remove breakpoints while the target is running */
1633 if (target->state != TARGET_HALTED) {
1634 LOG_WARNING("target not halted");
1635 return ERROR_TARGET_NOT_HALTED;
1636 }
1637 #endif
1638
1639 if (breakpoint->set) {
1640 aarch64_unset_breakpoint(target, breakpoint);
1641 if (breakpoint->type == BKPT_HARD)
1642 aarch64->brp_num_available++;
1643 }
1644
1645 return ERROR_OK;
1646 }
1647
1648 /*
1649 * Cortex-A8 Reset functions
1650 */
1651
1652 static int aarch64_assert_reset(struct target *target)
1653 {
1654 struct armv8_common *armv8 = target_to_armv8(target);
1655
1656 LOG_DEBUG(" ");
1657
1658 /* FIXME when halt is requested, make it work somehow... */
1659
1660 /* Issue some kind of warm reset. */
1661 if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
1662 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1663 else if (jtag_get_reset_config() & RESET_HAS_SRST) {
1664 /* REVISIT handle "pulls" cases, if there's
1665 * hardware that needs them to work.
1666 */
1667 jtag_add_reset(0, 1);
1668 } else {
1669 LOG_ERROR("%s: how to reset?", target_name(target));
1670 return ERROR_FAIL;
1671 }
1672
1673 /* registers are now invalid */
1674 if (target_was_examined(target)) {
1675 register_cache_invalidate(armv8->arm.core_cache);
1676 register_cache_invalidate(armv8->arm.core_cache->next);
1677 }
1678
1679 target->state = TARGET_RESET;
1680
1681 return ERROR_OK;
1682 }
1683
1684 static int aarch64_deassert_reset(struct target *target)
1685 {
1686 int retval;
1687
1688 LOG_DEBUG(" ");
1689
1690 /* be certain SRST is off */
1691 jtag_add_reset(0, 0);
1692
1693 if (!target_was_examined(target))
1694 return ERROR_OK;
1695
1696 retval = aarch64_poll(target);
1697 if (retval != ERROR_OK)
1698 return retval;
1699
1700 retval = aarch64_init_debug_access(target);
1701 if (retval != ERROR_OK)
1702 return retval;
1703
1704 if (target->reset_halt) {
1705 if (target->state != TARGET_HALTED) {
1706 LOG_WARNING("%s: ran after reset and before halt ...",
1707 target_name(target));
1708 retval = target_halt(target);
1709 }
1710 }
1711
1712 return retval;
1713 }
1714
1715 static int aarch64_write_cpu_memory_slow(struct target *target,
1716 uint32_t size, uint32_t count, const uint8_t *buffer, uint32_t *dscr)
1717 {
1718 struct armv8_common *armv8 = target_to_armv8(target);
1719 struct arm_dpm *dpm = &armv8->dpm;
1720 struct arm *arm = &armv8->arm;
1721 int retval;
1722
1723 armv8_reg_current(arm, 1)->dirty = true;
1724
1725 /* change DCC to normal mode if necessary */
1726 if (*dscr & DSCR_MA) {
1727 *dscr &= ~DSCR_MA;
1728 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1729 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
1730 if (retval != ERROR_OK)
1731 return retval;
1732 }
1733
1734 while (count) {
1735 uint32_t data, opcode;
1736
1737 /* write the data to store into DTRRX */
1738 if (size == 1)
1739 data = *buffer;
1740 else if (size == 2)
1741 data = target_buffer_get_u16(target, buffer);
1742 else
1743 data = target_buffer_get_u32(target, buffer);
1744 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1745 armv8->debug_base + CPUV8_DBG_DTRRX, data);
1746 if (retval != ERROR_OK)
1747 return retval;
1748
1749 if (arm->core_state == ARM_STATE_AARCH64)
1750 retval = dpm->instr_execute(dpm, ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 1));
1751 else
1752 retval = dpm->instr_execute(dpm, ARMV4_5_MRC(14, 0, 1, 0, 5, 0));
1753 if (retval != ERROR_OK)
1754 return retval;
1755
1756 if (size == 1)
1757 opcode = armv8_opcode(armv8, ARMV8_OPC_STRB_IP);
1758 else if (size == 2)
1759 opcode = armv8_opcode(armv8, ARMV8_OPC_STRH_IP);
1760 else
1761 opcode = armv8_opcode(armv8, ARMV8_OPC_STRW_IP);
1762 retval = dpm->instr_execute(dpm, opcode);
1763 if (retval != ERROR_OK)
1764 return retval;
1765
1766 /* Advance */
1767 buffer += size;
1768 --count;
1769 }
1770
1771 return ERROR_OK;
1772 }
1773
1774 static int aarch64_write_cpu_memory_fast(struct target *target,
1775 uint32_t count, const uint8_t *buffer, uint32_t *dscr)
1776 {
1777 struct armv8_common *armv8 = target_to_armv8(target);
1778 struct arm *arm = &armv8->arm;
1779 int retval;
1780
1781 armv8_reg_current(arm, 1)->dirty = true;
1782
1783 /* Step 1.d - Change DCC to memory mode */
1784 *dscr |= DSCR_MA;
1785 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1786 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
1787 if (retval != ERROR_OK)
1788 return retval;
1789
1790
1791 /* Step 2.a - Do the write */
1792 retval = mem_ap_write_buf_noincr(armv8->debug_ap,
1793 buffer, 4, count, armv8->debug_base + CPUV8_DBG_DTRRX);
1794 if (retval != ERROR_OK)
1795 return retval;
1796
1797 /* Step 3.a - Switch DTR mode back to Normal mode */
1798 *dscr &= ~DSCR_MA;
1799 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1800 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
1801 if (retval != ERROR_OK)
1802 return retval;
1803
1804 return ERROR_OK;
1805 }
1806
1807 static int aarch64_write_cpu_memory(struct target *target,
1808 uint64_t address, uint32_t size,
1809 uint32_t count, const uint8_t *buffer)
1810 {
1811 /* write memory through APB-AP */
1812 int retval = ERROR_COMMAND_SYNTAX_ERROR;
1813 struct armv8_common *armv8 = target_to_armv8(target);
1814 struct arm_dpm *dpm = &armv8->dpm;
1815 struct arm *arm = &armv8->arm;
1816 uint32_t dscr;
1817
1818 if (target->state != TARGET_HALTED) {
1819 LOG_WARNING("target not halted");
1820 return ERROR_TARGET_NOT_HALTED;
1821 }
1822
1823 /* Mark register X0 as dirty, as it will be used
1824 * for transferring the data.
1825 * It will be restored automatically when exiting
1826 * debug mode
1827 */
1828 armv8_reg_current(arm, 0)->dirty = true;
1829
1830 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1831
1832 /* Read DSCR */
1833 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1834 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1835 if (retval != ERROR_OK)
1836 return retval;
1837
1838 /* Set Normal access mode */
1839 dscr = (dscr & ~DSCR_MA);
1840 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1841 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1842 if (retval != ERROR_OK)
1843 return retval;
1844
1845 if (arm->core_state == ARM_STATE_AARCH64) {
1846 /* Write X0 with value 'address' using write procedure */
1847 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1848 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1849 retval = dpm->instr_write_data_dcc_64(dpm,
1850 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), address);
1851 } else {
1852 /* Write R0 with value 'address' using write procedure */
1853 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
1854 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1855 retval = dpm->instr_write_data_dcc(dpm,
1856 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address);
1857 }
1858
1859 if (retval != ERROR_OK)
1860 return retval;
1861
1862 if (size == 4 && (address % 4) == 0)
1863 retval = aarch64_write_cpu_memory_fast(target, count, buffer, &dscr);
1864 else
1865 retval = aarch64_write_cpu_memory_slow(target, size, count, buffer, &dscr);
1866
1867 if (retval != ERROR_OK) {
1868 /* Unset DTR mode */
1869 mem_ap_read_atomic_u32(armv8->debug_ap,
1870 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1871 dscr &= ~DSCR_MA;
1872 mem_ap_write_atomic_u32(armv8->debug_ap,
1873 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1874 }
1875
1876 /* Check for sticky abort flags in the DSCR */
1877 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1878 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1879 if (retval != ERROR_OK)
1880 return retval;
1881
1882 dpm->dscr = dscr;
1883 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
1884 /* Abort occurred - clear it and exit */
1885 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
1886 armv8_dpm_handle_exception(dpm, true);
1887 return ERROR_FAIL;
1888 }
1889
1890 /* Done */
1891 return ERROR_OK;
1892 }
1893
1894 static int aarch64_read_cpu_memory_slow(struct target *target,
1895 uint32_t size, uint32_t count, uint8_t *buffer, uint32_t *dscr)
1896 {
1897 struct armv8_common *armv8 = target_to_armv8(target);
1898 struct arm_dpm *dpm = &armv8->dpm;
1899 struct arm *arm = &armv8->arm;
1900 int retval;
1901
1902 armv8_reg_current(arm, 1)->dirty = true;
1903
1904 /* change DCC to normal mode (if necessary) */
1905 if (*dscr & DSCR_MA) {
1906 *dscr &= DSCR_MA;
1907 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1908 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
1909 if (retval != ERROR_OK)
1910 return retval;
1911 }
1912
1913 while (count) {
1914 uint32_t opcode, data;
1915
1916 if (size == 1)
1917 opcode = armv8_opcode(armv8, ARMV8_OPC_LDRB_IP);
1918 else if (size == 2)
1919 opcode = armv8_opcode(armv8, ARMV8_OPC_LDRH_IP);
1920 else
1921 opcode = armv8_opcode(armv8, ARMV8_OPC_LDRW_IP);
1922 retval = dpm->instr_execute(dpm, opcode);
1923 if (retval != ERROR_OK)
1924 return retval;
1925
1926 if (arm->core_state == ARM_STATE_AARCH64)
1927 retval = dpm->instr_execute(dpm, ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 1));
1928 else
1929 retval = dpm->instr_execute(dpm, ARMV4_5_MCR(14, 0, 1, 0, 5, 0));
1930 if (retval != ERROR_OK)
1931 return retval;
1932
1933 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1934 armv8->debug_base + CPUV8_DBG_DTRTX, &data);
1935 if (retval != ERROR_OK)
1936 return retval;
1937
1938 if (size == 1)
1939 *buffer = (uint8_t)data;
1940 else if (size == 2)
1941 target_buffer_set_u16(target, buffer, (uint16_t)data);
1942 else
1943 target_buffer_set_u32(target, buffer, data);
1944
1945 /* Advance */
1946 buffer += size;
1947 --count;
1948 }
1949
1950 return ERROR_OK;
1951 }
1952
1953 static int aarch64_read_cpu_memory_fast(struct target *target,
1954 uint32_t count, uint8_t *buffer, uint32_t *dscr)
1955 {
1956 struct armv8_common *armv8 = target_to_armv8(target);
1957 struct arm_dpm *dpm = &armv8->dpm;
1958 struct arm *arm = &armv8->arm;
1959 int retval;
1960 uint32_t value;
1961
1962 /* Mark X1 as dirty */
1963 armv8_reg_current(arm, 1)->dirty = true;
1964
1965 if (arm->core_state == ARM_STATE_AARCH64) {
1966 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
1967 retval = dpm->instr_execute(dpm, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0));
1968 } else {
1969 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
1970 retval = dpm->instr_execute(dpm, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
1971 }
1972
1973 if (retval != ERROR_OK)
1974 return retval;
1975
1976 /* Step 1.e - Change DCC to memory mode */
1977 *dscr |= DSCR_MA;
1978 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1979 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
1980 if (retval != ERROR_OK)
1981 return retval;
1982
1983 /* Step 1.f - read DBGDTRTX and discard the value */
1984 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1985 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
1986 if (retval != ERROR_OK)
1987 return retval;
1988
1989 count--;
1990 /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
1991 * Abort flags are sticky, so can be read at end of transactions
1992 *
1993 * This data is read in aligned to 32 bit boundary.
1994 */
1995
1996 if (count) {
1997 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
1998 * increments X0 by 4. */
1999 retval = mem_ap_read_buf_noincr(armv8->debug_ap, buffer, 4, count,
2000 armv8->debug_base + CPUV8_DBG_DTRTX);
2001 if (retval != ERROR_OK)
2002 return retval;
2003 }
2004
2005 /* Step 3.a - set DTR access mode back to Normal mode */
2006 *dscr &= ~DSCR_MA;
2007 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2008 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2009 if (retval != ERROR_OK)
2010 return retval;
2011
2012 /* Step 3.b - read DBGDTRTX for the final value */
2013 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2014 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2015 if (retval != ERROR_OK)
2016 return retval;
2017
2018 target_buffer_set_u32(target, buffer + count * 4, value);
2019 return retval;
2020 }
2021
2022 static int aarch64_read_cpu_memory(struct target *target,
2023 target_addr_t address, uint32_t size,
2024 uint32_t count, uint8_t *buffer)
2025 {
2026 /* read memory through APB-AP */
2027 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2028 struct armv8_common *armv8 = target_to_armv8(target);
2029 struct arm_dpm *dpm = &armv8->dpm;
2030 struct arm *arm = &armv8->arm;
2031 uint32_t dscr;
2032
2033 LOG_DEBUG("Reading CPU memory address 0x%016" PRIx64 " size %" PRIu32 " count %" PRIu32,
2034 address, size, count);
2035
2036 if (target->state != TARGET_HALTED) {
2037 LOG_WARNING("target not halted");
2038 return ERROR_TARGET_NOT_HALTED;
2039 }
2040
2041 /* Mark register X0 as dirty, as it will be used
2042 * for transferring the data.
2043 * It will be restored automatically when exiting
2044 * debug mode
2045 */
2046 armv8_reg_current(arm, 0)->dirty = true;
2047
2048 /* Read DSCR */
2049 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2050 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2051 if (retval != ERROR_OK)
2052 return retval;
2053
2054 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
2055
2056 /* Set Normal access mode */
2057 dscr &= ~DSCR_MA;
2058 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2059 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2060 if (retval != ERROR_OK)
2061 return retval;
2062
2063 if (arm->core_state == ARM_STATE_AARCH64) {
2064 /* Write X0 with value 'address' using write procedure */
2065 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
2066 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
2067 retval = dpm->instr_write_data_dcc_64(dpm,
2068 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), address);
2069 } else {
2070 /* Write R0 with value 'address' using write procedure */
2071 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
2072 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
2073 retval = dpm->instr_write_data_dcc(dpm,
2074 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address);
2075 }
2076
2077 if (retval != ERROR_OK)
2078 return retval;
2079
2080 if (size == 4 && (address % 4) == 0)
2081 retval = aarch64_read_cpu_memory_fast(target, count, buffer, &dscr);
2082 else
2083 retval = aarch64_read_cpu_memory_slow(target, size, count, buffer, &dscr);
2084
2085 if (dscr & DSCR_MA) {
2086 dscr &= ~DSCR_MA;
2087 mem_ap_write_atomic_u32(armv8->debug_ap,
2088 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2089 }
2090
2091 if (retval != ERROR_OK)
2092 return retval;
2093
2094 /* Check for sticky abort flags in the DSCR */
2095 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2096 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2097 if (retval != ERROR_OK)
2098 return retval;
2099
2100 dpm->dscr = dscr;
2101
2102 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
2103 /* Abort occurred - clear it and exit */
2104 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
2105 armv8_dpm_handle_exception(dpm, true);
2106 return ERROR_FAIL;
2107 }
2108
2109 /* Done */
2110 return ERROR_OK;
2111 }
2112
2113 static int aarch64_read_phys_memory(struct target *target,
2114 target_addr_t address, uint32_t size,
2115 uint32_t count, uint8_t *buffer)
2116 {
2117 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2118
2119 if (count && buffer) {
2120 /* read memory through APB-AP */
2121 retval = aarch64_mmu_modify(target, 0);
2122 if (retval != ERROR_OK)
2123 return retval;
2124 retval = aarch64_read_cpu_memory(target, address, size, count, buffer);
2125 }
2126 return retval;
2127 }
2128
2129 static int aarch64_read_memory(struct target *target, target_addr_t address,
2130 uint32_t size, uint32_t count, uint8_t *buffer)
2131 {
2132 int mmu_enabled = 0;
2133 int retval;
2134
2135 /* determine if MMU was enabled on target stop */
2136 retval = aarch64_mmu(target, &mmu_enabled);
2137 if (retval != ERROR_OK)
2138 return retval;
2139
2140 if (mmu_enabled) {
2141 /* enable MMU as we could have disabled it for phys access */
2142 retval = aarch64_mmu_modify(target, 1);
2143 if (retval != ERROR_OK)
2144 return retval;
2145 }
2146 return aarch64_read_cpu_memory(target, address, size, count, buffer);
2147 }
2148
2149 static int aarch64_write_phys_memory(struct target *target,
2150 target_addr_t address, uint32_t size,
2151 uint32_t count, const uint8_t *buffer)
2152 {
2153 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2154
2155 if (count && buffer) {
2156 /* write memory through APB-AP */
2157 retval = aarch64_mmu_modify(target, 0);
2158 if (retval != ERROR_OK)
2159 return retval;
2160 return aarch64_write_cpu_memory(target, address, size, count, buffer);
2161 }
2162
2163 return retval;
2164 }
2165
2166 static int aarch64_write_memory(struct target *target, target_addr_t address,
2167 uint32_t size, uint32_t count, const uint8_t *buffer)
2168 {
2169 int mmu_enabled = 0;
2170 int retval;
2171
2172 /* determine if MMU was enabled on target stop */
2173 retval = aarch64_mmu(target, &mmu_enabled);
2174 if (retval != ERROR_OK)
2175 return retval;
2176
2177 if (mmu_enabled) {
2178 /* enable MMU as we could have disabled it for phys access */
2179 retval = aarch64_mmu_modify(target, 1);
2180 if (retval != ERROR_OK)
2181 return retval;
2182 }
2183 return aarch64_write_cpu_memory(target, address, size, count, buffer);
2184 }
2185
2186 static int aarch64_handle_target_request(void *priv)
2187 {
2188 struct target *target = priv;
2189 struct armv8_common *armv8 = target_to_armv8(target);
2190 int retval;
2191
2192 if (!target_was_examined(target))
2193 return ERROR_OK;
2194 if (!target->dbg_msg_enabled)
2195 return ERROR_OK;
2196
2197 if (target->state == TARGET_RUNNING) {
2198 uint32_t request;
2199 uint32_t dscr;
2200 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2201 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2202
2203 /* check if we have data */
2204 while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
2205 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2206 armv8->debug_base + CPUV8_DBG_DTRTX, &request);
2207 if (retval == ERROR_OK) {
2208 target_request(target, request);
2209 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2210 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2211 }
2212 }
2213 }
2214
2215 return ERROR_OK;
2216 }
2217
2218 static int aarch64_examine_first(struct target *target)
2219 {
2220 struct aarch64_common *aarch64 = target_to_aarch64(target);
2221 struct armv8_common *armv8 = &aarch64->armv8_common;
2222 struct adiv5_dap *swjdp = armv8->arm.dap;
2223 struct aarch64_private_config *pc;
2224 int i;
2225 int retval = ERROR_OK;
2226 uint64_t debug, ttypr;
2227 uint32_t cpuid;
2228 uint32_t tmp0, tmp1, tmp2, tmp3;
2229 debug = ttypr = cpuid = 0;
2230
2231 /* Search for the APB-AB - it is needed for access to debug registers */
2232 retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap);
2233 if (retval != ERROR_OK) {
2234 LOG_ERROR("Could not find APB-AP for debug access");
2235 return retval;
2236 }
2237
2238 retval = mem_ap_init(armv8->debug_ap);
2239 if (retval != ERROR_OK) {
2240 LOG_ERROR("Could not initialize the APB-AP");
2241 return retval;
2242 }
2243
2244 armv8->debug_ap->memaccess_tck = 10;
2245
2246 if (!target->dbgbase_set) {
2247 uint32_t dbgbase;
2248 /* Get ROM Table base */
2249 uint32_t apid;
2250 int32_t coreidx = target->coreid;
2251 retval = dap_get_debugbase(armv8->debug_ap, &dbgbase, &apid);
2252 if (retval != ERROR_OK)
2253 return retval;
2254 /* Lookup 0x15 -- Processor DAP */
2255 retval = dap_lookup_cs_component(armv8->debug_ap, dbgbase, 0x15,
2256 &armv8->debug_base, &coreidx);
2257 if (retval != ERROR_OK)
2258 return retval;
2259 LOG_DEBUG("Detected core %" PRId32 " dbgbase: %08" PRIx32
2260 " apid: %08" PRIx32, coreidx, armv8->debug_base, apid);
2261 } else
2262 armv8->debug_base = target->dbgbase;
2263
2264 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2265 armv8->debug_base + CPUV8_DBG_OSLAR, 0);
2266 if (retval != ERROR_OK) {
2267 LOG_DEBUG("Examine %s failed", "oslock");
2268 return retval;
2269 }
2270
2271 retval = mem_ap_read_u32(armv8->debug_ap,
2272 armv8->debug_base + CPUV8_DBG_MAINID0, &cpuid);
2273 if (retval != ERROR_OK) {
2274 LOG_DEBUG("Examine %s failed", "CPUID");
2275 return retval;
2276 }
2277
2278 retval = mem_ap_read_u32(armv8->debug_ap,
2279 armv8->debug_base + CPUV8_DBG_MEMFEATURE0, &tmp0);
2280 retval += mem_ap_read_u32(armv8->debug_ap,
2281 armv8->debug_base + CPUV8_DBG_MEMFEATURE0 + 4, &tmp1);
2282 if (retval != ERROR_OK) {
2283 LOG_DEBUG("Examine %s failed", "Memory Model Type");
2284 return retval;
2285 }
2286 retval = mem_ap_read_u32(armv8->debug_ap,
2287 armv8->debug_base + CPUV8_DBG_DBGFEATURE0, &tmp2);
2288 retval += mem_ap_read_u32(armv8->debug_ap,
2289 armv8->debug_base + CPUV8_DBG_DBGFEATURE0 + 4, &tmp3);
2290 if (retval != ERROR_OK) {
2291 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2292 return retval;
2293 }
2294
2295 retval = dap_run(armv8->debug_ap->dap);
2296 if (retval != ERROR_OK) {
2297 LOG_ERROR("%s: examination failed\n", target_name(target));
2298 return retval;
2299 }
2300
2301 ttypr |= tmp1;
2302 ttypr = (ttypr << 32) | tmp0;
2303 debug |= tmp3;
2304 debug = (debug << 32) | tmp2;
2305
2306 LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
2307 LOG_DEBUG("ttypr = 0x%08" PRIx64, ttypr);
2308 LOG_DEBUG("debug = 0x%08" PRIx64, debug);
2309
2310 if (target->private_config == NULL)
2311 return ERROR_FAIL;
2312
2313 pc = (struct aarch64_private_config *)target->private_config;
2314 if (pc->cti == NULL)
2315 return ERROR_FAIL;
2316
2317 armv8->cti = pc->cti;
2318
2319 retval = aarch64_dpm_setup(aarch64, debug);
2320 if (retval != ERROR_OK)
2321 return retval;
2322
2323 /* Setup Breakpoint Register Pairs */
2324 aarch64->brp_num = (uint32_t)((debug >> 12) & 0x0F) + 1;
2325 aarch64->brp_num_context = (uint32_t)((debug >> 28) & 0x0F) + 1;
2326 aarch64->brp_num_available = aarch64->brp_num;
2327 aarch64->brp_list = calloc(aarch64->brp_num, sizeof(struct aarch64_brp));
2328 for (i = 0; i < aarch64->brp_num; i++) {
2329 aarch64->brp_list[i].used = 0;
2330 if (i < (aarch64->brp_num-aarch64->brp_num_context))
2331 aarch64->brp_list[i].type = BRP_NORMAL;
2332 else
2333 aarch64->brp_list[i].type = BRP_CONTEXT;
2334 aarch64->brp_list[i].value = 0;
2335 aarch64->brp_list[i].control = 0;
2336 aarch64->brp_list[i].BRPn = i;
2337 }
2338
2339 LOG_DEBUG("Configured %i hw breakpoints", aarch64->brp_num);
2340
2341 target->state = TARGET_UNKNOWN;
2342 target->debug_reason = DBG_REASON_NOTHALTED;
2343 aarch64->isrmasking_mode = AARCH64_ISRMASK_ON;
2344 target_set_examined(target);
2345 return ERROR_OK;
2346 }
2347
2348 static int aarch64_examine(struct target *target)
2349 {
2350 int retval = ERROR_OK;
2351
2352 /* don't re-probe hardware after each reset */
2353 if (!target_was_examined(target))
2354 retval = aarch64_examine_first(target);
2355
2356 /* Configure core debug access */
2357 if (retval == ERROR_OK)
2358 retval = aarch64_init_debug_access(target);
2359
2360 return retval;
2361 }
2362
2363 /*
2364 * Cortex-A8 target creation and initialization
2365 */
2366
2367 static int aarch64_init_target(struct command_context *cmd_ctx,
2368 struct target *target)
2369 {
2370 /* examine_first() does a bunch of this */
2371 arm_semihosting_init(target);
2372 return ERROR_OK;
2373 }
2374
2375 static int aarch64_init_arch_info(struct target *target,
2376 struct aarch64_common *aarch64, struct adiv5_dap *dap)
2377 {
2378 struct armv8_common *armv8 = &aarch64->armv8_common;
2379
2380 /* Setup struct aarch64_common */
2381 aarch64->common_magic = AARCH64_COMMON_MAGIC;
2382 armv8->arm.dap = dap;
2383
2384 /* register arch-specific functions */
2385 armv8->examine_debug_reason = NULL;
2386 armv8->post_debug_entry = aarch64_post_debug_entry;
2387 armv8->pre_restore_context = NULL;
2388 armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
2389
2390 armv8_init_arch_info(target, armv8);
2391 target_register_timer_callback(aarch64_handle_target_request, 1,
2392 TARGET_TIMER_TYPE_PERIODIC, target);
2393
2394 return ERROR_OK;
2395 }
2396
2397 static int aarch64_target_create(struct target *target, Jim_Interp *interp)
2398 {
2399 struct aarch64_private_config *pc = target->private_config;
2400 struct aarch64_common *aarch64;
2401
2402 if (adiv5_verify_config(&pc->adiv5_config) != ERROR_OK)
2403 return ERROR_FAIL;
2404
2405 aarch64 = calloc(1, sizeof(struct aarch64_common));
2406 if (aarch64 == NULL) {
2407 LOG_ERROR("Out of memory");
2408 return ERROR_FAIL;
2409 }
2410
2411 return aarch64_init_arch_info(target, aarch64, pc->adiv5_config.dap);
2412 }
2413
2414 static void aarch64_deinit_target(struct target *target)
2415 {
2416 struct aarch64_common *aarch64 = target_to_aarch64(target);
2417 struct armv8_common *armv8 = &aarch64->armv8_common;
2418 struct arm_dpm *dpm = &armv8->dpm;
2419
2420 armv8_free_reg_cache(target);
2421 free(aarch64->brp_list);
2422 free(dpm->dbp);
2423 free(dpm->dwp);
2424 free(target->private_config);
2425 free(aarch64);
2426 }
2427
2428 static int aarch64_mmu(struct target *target, int *enabled)
2429 {
2430 if (target->state != TARGET_HALTED) {
2431 LOG_ERROR("%s: target %s not halted", __func__, target_name(target));
2432 return ERROR_TARGET_INVALID;
2433 }
2434
2435 *enabled = target_to_aarch64(target)->armv8_common.armv8_mmu.mmu_enabled;
2436 return ERROR_OK;
2437 }
2438
2439 static int aarch64_virt2phys(struct target *target, target_addr_t virt,
2440 target_addr_t *phys)
2441 {
2442 return armv8_mmu_translate_va_pa(target, virt, phys, 1);
2443 }
2444
2445 /*
2446 * private target configuration items
2447 */
2448 enum aarch64_cfg_param {
2449 CFG_CTI,
2450 };
2451
2452 static const Jim_Nvp nvp_config_opts[] = {
2453 { .name = "-cti", .value = CFG_CTI },
2454 { .name = NULL, .value = -1 }
2455 };
2456
2457 static int aarch64_jim_configure(struct target *target, Jim_GetOptInfo *goi)
2458 {
2459 struct aarch64_private_config *pc;
2460 Jim_Nvp *n;
2461 int e;
2462
2463 pc = (struct aarch64_private_config *)target->private_config;
2464 if (pc == NULL) {
2465 pc = calloc(1, sizeof(struct aarch64_private_config));
2466 target->private_config = pc;
2467 }
2468
2469 /*
2470 * Call adiv5_jim_configure() to parse the common DAP options
2471 * It will return JIM_CONTINUE if it didn't find any known
2472 * options, JIM_OK if it correctly parsed the topmost option
2473 * and JIM_ERR if an error occured during parameter evaluation.
2474 * For JIM_CONTINUE, we check our own params.
2475 */
2476 e = adiv5_jim_configure(target, goi);
2477 if (e != JIM_CONTINUE)
2478 return e;
2479
2480 /* parse config or cget options ... */
2481 if (goi->argc > 0) {
2482 Jim_SetEmptyResult(goi->interp);
2483
2484 /* check first if topmost item is for us */
2485 e = Jim_Nvp_name2value_obj(goi->interp, nvp_config_opts,
2486 goi->argv[0], &n);
2487 if (e != JIM_OK)
2488 return JIM_CONTINUE;
2489
2490 e = Jim_GetOpt_Obj(goi, NULL);
2491 if (e != JIM_OK)
2492 return e;
2493
2494 switch (n->value) {
2495 case CFG_CTI: {
2496 if (goi->isconfigure) {
2497 Jim_Obj *o_cti;
2498 struct arm_cti *cti;
2499 e = Jim_GetOpt_Obj(goi, &o_cti);
2500 if (e != JIM_OK)
2501 return e;
2502 cti = cti_instance_by_jim_obj(goi->interp, o_cti);
2503 if (cti == NULL) {
2504 Jim_SetResultString(goi->interp, "CTI name invalid!", -1);
2505 return JIM_ERR;
2506 }
2507 pc->cti = cti;
2508 } else {
2509 if (goi->argc != 0) {
2510 Jim_WrongNumArgs(goi->interp,
2511 goi->argc, goi->argv,
2512 "NO PARAMS");
2513 return JIM_ERR;
2514 }
2515
2516 if (pc == NULL || pc->cti == NULL) {
2517 Jim_SetResultString(goi->interp, "CTI not configured", -1);
2518 return JIM_ERR;
2519 }
2520 Jim_SetResultString(goi->interp, arm_cti_name(pc->cti), -1);
2521 }
2522 break;
2523 }
2524
2525 default:
2526 return JIM_CONTINUE;
2527 }
2528 }
2529
2530 return JIM_OK;
2531 }
2532
2533 COMMAND_HANDLER(aarch64_handle_cache_info_command)
2534 {
2535 struct target *target = get_current_target(CMD_CTX);
2536 struct armv8_common *armv8 = target_to_armv8(target);
2537
2538 return armv8_handle_cache_info_command(CMD_CTX,
2539 &armv8->armv8_mmu.armv8_cache);
2540 }
2541
2542
2543 COMMAND_HANDLER(aarch64_handle_dbginit_command)
2544 {
2545 struct target *target = get_current_target(CMD_CTX);
2546 if (!target_was_examined(target)) {
2547 LOG_ERROR("target not examined yet");
2548 return ERROR_FAIL;
2549 }
2550
2551 return aarch64_init_debug_access(target);
2552 }
2553 COMMAND_HANDLER(aarch64_handle_smp_off_command)
2554 {
2555 struct target *target = get_current_target(CMD_CTX);
2556 /* check target is an smp target */
2557 struct target_list *head;
2558 struct target *curr;
2559 head = target->head;
2560 target->smp = 0;
2561 if (head != (struct target_list *)NULL) {
2562 while (head != (struct target_list *)NULL) {
2563 curr = head->target;
2564 curr->smp = 0;
2565 head = head->next;
2566 }
2567 /* fixes the target display to the debugger */
2568 target->gdb_service->target = target;
2569 }
2570 return ERROR_OK;
2571 }
2572
2573 COMMAND_HANDLER(aarch64_handle_smp_on_command)
2574 {
2575 struct target *target = get_current_target(CMD_CTX);
2576 struct target_list *head;
2577 struct target *curr;
2578 head = target->head;
2579 if (head != (struct target_list *)NULL) {
2580 target->smp = 1;
2581 while (head != (struct target_list *)NULL) {
2582 curr = head->target;
2583 curr->smp = 1;
2584 head = head->next;
2585 }
2586 }
2587 return ERROR_OK;
2588 }
2589
2590 COMMAND_HANDLER(aarch64_mask_interrupts_command)
2591 {
2592 struct target *target = get_current_target(CMD_CTX);
2593 struct aarch64_common *aarch64 = target_to_aarch64(target);
2594
2595 static const Jim_Nvp nvp_maskisr_modes[] = {
2596 { .name = "off", .value = AARCH64_ISRMASK_OFF },
2597 { .name = "on", .value = AARCH64_ISRMASK_ON },
2598 { .name = NULL, .value = -1 },
2599 };
2600 const Jim_Nvp *n;
2601
2602 if (CMD_ARGC > 0) {
2603 n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
2604 if (n->name == NULL) {
2605 LOG_ERROR("Unknown parameter: %s - should be off or on", CMD_ARGV[0]);
2606 return ERROR_COMMAND_SYNTAX_ERROR;
2607 }
2608
2609 aarch64->isrmasking_mode = n->value;
2610 }
2611
2612 n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, aarch64->isrmasking_mode);
2613 command_print(CMD_CTX, "aarch64 interrupt mask %s", n->name);
2614
2615 return ERROR_OK;
2616 }
2617
2618 static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
2619 {
2620 struct command_context *context;
2621 struct target *target;
2622 struct arm *arm;
2623 int retval;
2624 bool is_mcr = false;
2625 int arg_cnt = 0;
2626
2627 if (Jim_CompareStringImmediate(interp, argv[0], "mcr")) {
2628 is_mcr = true;
2629 arg_cnt = 7;
2630 } else {
2631 arg_cnt = 6;
2632 }
2633
2634 context = current_command_context(interp);
2635 assert(context != NULL);
2636
2637 target = get_current_target(context);
2638 if (target == NULL) {
2639 LOG_ERROR("%s: no current target", __func__);
2640 return JIM_ERR;
2641 }
2642 if (!target_was_examined(target)) {
2643 LOG_ERROR("%s: not yet examined", target_name(target));
2644 return JIM_ERR;
2645 }
2646
2647 arm = target_to_arm(target);
2648 if (!is_arm(arm)) {
2649 LOG_ERROR("%s: not an ARM", target_name(target));
2650 return JIM_ERR;
2651 }
2652
2653 if (target->state != TARGET_HALTED)
2654 return ERROR_TARGET_NOT_HALTED;
2655
2656 if (arm->core_state == ARM_STATE_AARCH64) {
2657 LOG_ERROR("%s: not 32-bit arm target", target_name(target));
2658 return JIM_ERR;
2659 }
2660
2661 if (argc != arg_cnt) {
2662 LOG_ERROR("%s: wrong number of arguments", __func__);
2663 return JIM_ERR;
2664 }
2665
2666 int cpnum;
2667 uint32_t op1;
2668 uint32_t op2;
2669 uint32_t CRn;
2670 uint32_t CRm;
2671 uint32_t value;
2672 long l;
2673
2674 /* NOTE: parameter sequence matches ARM instruction set usage:
2675 * MCR pNUM, op1, rX, CRn, CRm, op2 ; write CP from rX
2676 * MRC pNUM, op1, rX, CRn, CRm, op2 ; read CP into rX
2677 * The "rX" is necessarily omitted; it uses Tcl mechanisms.
2678 */
2679 retval = Jim_GetLong(interp, argv[1], &l);
2680 if (retval != JIM_OK)
2681 return retval;
2682 if (l & ~0xf) {
2683 LOG_ERROR("%s: %s %d out of range", __func__,
2684 "coprocessor", (int) l);
2685 return JIM_ERR;
2686 }
2687 cpnum = l;
2688
2689 retval = Jim_GetLong(interp, argv[2], &l);
2690 if (retval != JIM_OK)
2691 return retval;
2692 if (l & ~0x7) {
2693 LOG_ERROR("%s: %s %d out of range", __func__,
2694 "op1", (int) l);
2695 return JIM_ERR;
2696 }
2697 op1 = l;
2698
2699 retval = Jim_GetLong(interp, argv[3], &l);
2700 if (retval != JIM_OK)
2701 return retval;
2702 if (l & ~0xf) {
2703 LOG_ERROR("%s: %s %d out of range", __func__,
2704 "CRn", (int) l);
2705 return JIM_ERR;
2706 }
2707 CRn = l;
2708
2709 retval = Jim_GetLong(interp, argv[4], &l);
2710 if (retval != JIM_OK)
2711 return retval;
2712 if (l & ~0xf) {
2713 LOG_ERROR("%s: %s %d out of range", __func__,
2714 "CRm", (int) l);
2715 return JIM_ERR;
2716 }
2717 CRm = l;
2718
2719 retval = Jim_GetLong(interp, argv[5], &l);
2720 if (retval != JIM_OK)
2721 return retval;
2722 if (l & ~0x7) {
2723 LOG_ERROR("%s: %s %d out of range", __func__,
2724 "op2", (int) l);
2725 return JIM_ERR;
2726 }
2727 op2 = l;
2728
2729 value = 0;
2730
2731 if (is_mcr == true) {
2732 retval = Jim_GetLong(interp, argv[6], &l);
2733 if (retval != JIM_OK)
2734 return retval;
2735 value = l;
2736
2737 /* NOTE: parameters reordered! */
2738 /* ARMV4_5_MCR(cpnum, op1, 0, CRn, CRm, op2) */
2739 retval = arm->mcr(target, cpnum, op1, op2, CRn, CRm, value);
2740 if (retval != ERROR_OK)
2741 return JIM_ERR;
2742 } else {
2743 /* NOTE: parameters reordered! */
2744 /* ARMV4_5_MRC(cpnum, op1, 0, CRn, CRm, op2) */
2745 retval = arm->mrc(target, cpnum, op1, op2, CRn, CRm, &value);
2746 if (retval != ERROR_OK)
2747 return JIM_ERR;
2748
2749 Jim_SetResult(interp, Jim_NewIntObj(interp, value));
2750 }
2751
2752 return JIM_OK;
2753 }
2754
2755 static const struct command_registration aarch64_exec_command_handlers[] = {
2756 {
2757 .name = "cache_info",
2758 .handler = aarch64_handle_cache_info_command,
2759 .mode = COMMAND_EXEC,
2760 .help = "display information about target caches",
2761 .usage = "",
2762 },
2763 {
2764 .name = "dbginit",
2765 .handler = aarch64_handle_dbginit_command,
2766 .mode = COMMAND_EXEC,
2767 .help = "Initialize core debug",
2768 .usage = "",
2769 },
2770 { .name = "smp_off",
2771 .handler = aarch64_handle_smp_off_command,
2772 .mode = COMMAND_EXEC,
2773 .help = "Stop smp handling",
2774 .usage = "",
2775 },
2776 {
2777 .name = "smp_on",
2778 .handler = aarch64_handle_smp_on_command,
2779 .mode = COMMAND_EXEC,
2780 .help = "Restart smp handling",
2781 .usage = "",
2782 },
2783 {
2784 .name = "maskisr",
2785 .handler = aarch64_mask_interrupts_command,
2786 .mode = COMMAND_ANY,
2787 .help = "mask aarch64 interrupts during single-step",
2788 .usage = "['on'|'off']",
2789 },
2790 {
2791 .name = "mcr",
2792 .mode = COMMAND_EXEC,
2793 .jim_handler = jim_mcrmrc,
2794 .help = "write coprocessor register",
2795 .usage = "cpnum op1 CRn CRm op2 value",
2796 },
2797 {
2798 .name = "mrc",
2799 .mode = COMMAND_EXEC,
2800 .jim_handler = jim_mcrmrc,
2801 .help = "read coprocessor register",
2802 .usage = "cpnum op1 CRn CRm op2",
2803 },
2804
2805
2806 COMMAND_REGISTRATION_DONE
2807 };
2808
2809 static const struct command_registration aarch64_command_handlers[] = {
2810 {
2811 .chain = armv8_command_handlers,
2812 },
2813 {
2814 .name = "aarch64",
2815 .mode = COMMAND_ANY,
2816 .help = "Aarch64 command group",
2817 .usage = "",
2818 .chain = aarch64_exec_command_handlers,
2819 },
2820 COMMAND_REGISTRATION_DONE
2821 };
2822
2823 struct target_type aarch64_target = {
2824 .name = "aarch64",
2825
2826 .poll = aarch64_poll,
2827 .arch_state = armv8_arch_state,
2828
2829 .halt = aarch64_halt,
2830 .resume = aarch64_resume,
2831 .step = aarch64_step,
2832
2833 .assert_reset = aarch64_assert_reset,
2834 .deassert_reset = aarch64_deassert_reset,
2835
2836 /* REVISIT allow exporting VFP3 registers ... */
2837 .get_gdb_arch = armv8_get_gdb_arch,
2838 .get_gdb_reg_list = armv8_get_gdb_reg_list,
2839
2840 .read_memory = aarch64_read_memory,
2841 .write_memory = aarch64_write_memory,
2842
2843 .add_breakpoint = aarch64_add_breakpoint,
2844 .add_context_breakpoint = aarch64_add_context_breakpoint,
2845 .add_hybrid_breakpoint = aarch64_add_hybrid_breakpoint,
2846 .remove_breakpoint = aarch64_remove_breakpoint,
2847 .add_watchpoint = NULL,
2848 .remove_watchpoint = NULL,
2849
2850 .commands = aarch64_command_handlers,
2851 .target_create = aarch64_target_create,
2852 .target_jim_configure = aarch64_jim_configure,
2853 .init_target = aarch64_init_target,
2854 .deinit_target = aarch64_deinit_target,
2855 .examine = aarch64_examine,
2856
2857 .read_phys_memory = aarch64_read_phys_memory,
2858 .write_phys_memory = aarch64_write_phys_memory,
2859 .mmu = aarch64_mmu,
2860 .virt2phys = aarch64_virt2phys,
2861 };
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