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[openocd.git] / src / target / aarch64.c
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 <helper/time_support.h>
32
33 static int aarch64_poll(struct target *target);
34 static int aarch64_debug_entry(struct target *target);
35 static int aarch64_restore_context(struct target *target, bool bpwp);
36 static int aarch64_set_breakpoint(struct target *target,
37 struct breakpoint *breakpoint, uint8_t matchmode);
38 static int aarch64_set_context_breakpoint(struct target *target,
39 struct breakpoint *breakpoint, uint8_t matchmode);
40 static int aarch64_set_hybrid_breakpoint(struct target *target,
41 struct breakpoint *breakpoint);
42 static int aarch64_unset_breakpoint(struct target *target,
43 struct breakpoint *breakpoint);
44 static int aarch64_mmu(struct target *target, int *enabled);
45 static int aarch64_virt2phys(struct target *target,
46 target_addr_t virt, target_addr_t *phys);
47 static int aarch64_read_apb_ap_memory(struct target *target,
48 uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
49 static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
50 uint32_t opcode, uint32_t data);
51
52 static int aarch64_restore_system_control_reg(struct target *target)
53 {
54 int retval = ERROR_OK;
55
56 struct aarch64_common *aarch64 = target_to_aarch64(target);
57 struct armv8_common *armv8 = target_to_armv8(target);
58
59 if (aarch64->system_control_reg != aarch64->system_control_reg_curr) {
60 aarch64->system_control_reg_curr = aarch64->system_control_reg;
61 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
62
63 switch (armv8->arm.core_mode) {
64 case ARMV8_64_EL0T:
65 case ARMV8_64_EL1T:
66 case ARMV8_64_EL1H:
67 retval = armv8->arm.msr(target, 3, /*op 0*/
68 0, 1, /* op1, op2 */
69 0, 0, /* CRn, CRm */
70 aarch64->system_control_reg);
71 if (retval != ERROR_OK)
72 return retval;
73 break;
74 case ARMV8_64_EL2T:
75 case ARMV8_64_EL2H:
76 retval = armv8->arm.msr(target, 3, /*op 0*/
77 4, 1, /* op1, op2 */
78 0, 0, /* CRn, CRm */
79 aarch64->system_control_reg);
80 if (retval != ERROR_OK)
81 return retval;
82 break;
83 case ARMV8_64_EL3H:
84 case ARMV8_64_EL3T:
85 retval = armv8->arm.msr(target, 3, /*op 0*/
86 6, 1, /* op1, op2 */
87 0, 0, /* CRn, CRm */
88 aarch64->system_control_reg);
89 if (retval != ERROR_OK)
90 return retval;
91 break;
92 default:
93 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
94 }
95 }
96 return retval;
97 }
98
99 /* check address before aarch64_apb read write access with mmu on
100 * remove apb predictible data abort */
101 static int aarch64_check_address(struct target *target, uint32_t address)
102 {
103 /* TODO */
104 return ERROR_OK;
105 }
106 /* modify system_control_reg in order to enable or disable mmu for :
107 * - virt2phys address conversion
108 * - read or write memory in phys or virt address */
109 static int aarch64_mmu_modify(struct target *target, int enable)
110 {
111 struct aarch64_common *aarch64 = target_to_aarch64(target);
112 struct armv8_common *armv8 = &aarch64->armv8_common;
113 int retval = ERROR_OK;
114
115 if (enable) {
116 /* if mmu enabled at target stop and mmu not enable */
117 if (!(aarch64->system_control_reg & 0x1U)) {
118 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
119 return ERROR_FAIL;
120 }
121 if (!(aarch64->system_control_reg_curr & 0x1U)) {
122 aarch64->system_control_reg_curr |= 0x1U;
123 switch (armv8->arm.core_mode) {
124 case ARMV8_64_EL0T:
125 case ARMV8_64_EL1T:
126 case ARMV8_64_EL1H:
127 retval = armv8->arm.msr(target, 3, /*op 0*/
128 0, 0, /* op1, op2 */
129 1, 0, /* CRn, CRm */
130 aarch64->system_control_reg_curr);
131 if (retval != ERROR_OK)
132 return retval;
133 break;
134 case ARMV8_64_EL2T:
135 case ARMV8_64_EL2H:
136 retval = armv8->arm.msr(target, 3, /*op 0*/
137 4, 0, /* op1, op2 */
138 1, 0, /* CRn, CRm */
139 aarch64->system_control_reg_curr);
140 if (retval != ERROR_OK)
141 return retval;
142 break;
143 case ARMV8_64_EL3H:
144 case ARMV8_64_EL3T:
145 retval = armv8->arm.msr(target, 3, /*op 0*/
146 6, 0, /* op1, op2 */
147 1, 0, /* CRn, CRm */
148 aarch64->system_control_reg_curr);
149 if (retval != ERROR_OK)
150 return retval;
151 break;
152 default:
153 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
154 }
155 }
156 } else {
157 if (aarch64->system_control_reg_curr & 0x4U) {
158 /* data cache is active */
159 aarch64->system_control_reg_curr &= ~0x4U;
160 /* flush data cache armv7 function to be called */
161 if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache)
162 armv8->armv8_mmu.armv8_cache.flush_all_data_cache(target);
163 }
164 if ((aarch64->system_control_reg_curr & 0x1U)) {
165 aarch64->system_control_reg_curr &= ~0x1U;
166 switch (armv8->arm.core_mode) {
167 case ARMV8_64_EL0T:
168 case ARMV8_64_EL1T:
169 case ARMV8_64_EL1H:
170 retval = armv8->arm.msr(target, 3, /*op 0*/
171 0, 0, /* op1, op2 */
172 1, 0, /* CRn, CRm */
173 aarch64->system_control_reg_curr);
174 if (retval != ERROR_OK)
175 return retval;
176 break;
177 case ARMV8_64_EL2T:
178 case ARMV8_64_EL2H:
179 retval = armv8->arm.msr(target, 3, /*op 0*/
180 4, 0, /* op1, op2 */
181 1, 0, /* CRn, CRm */
182 aarch64->system_control_reg_curr);
183 if (retval != ERROR_OK)
184 return retval;
185 break;
186 case ARMV8_64_EL3H:
187 case ARMV8_64_EL3T:
188 retval = armv8->arm.msr(target, 3, /*op 0*/
189 6, 0, /* op1, op2 */
190 1, 0, /* CRn, CRm */
191 aarch64->system_control_reg_curr);
192 if (retval != ERROR_OK)
193 return retval;
194 break;
195 default:
196 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
197 break;
198 }
199 }
200 }
201 return retval;
202 }
203
204 /*
205 * Basic debug access, very low level assumes state is saved
206 */
207 static int aarch64_init_debug_access(struct target *target)
208 {
209 struct armv8_common *armv8 = target_to_armv8(target);
210 int retval;
211 uint32_t dummy;
212
213 LOG_DEBUG(" ");
214
215 /* Clear Sticky Power Down status Bit in PRSR to enable access to
216 the registers in the Core Power Domain */
217 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
218 armv8->debug_base + CPUV8_DBG_PRSR, &dummy);
219 if (retval != ERROR_OK)
220 return retval;
221
222 /*
223 * Static CTI configuration:
224 * Channel 0 -> trigger outputs HALT request to PE
225 * Channel 1 -> trigger outputs Resume request to PE
226 * Gate all channel trigger events from entering the CTM
227 */
228
229 /* Enable CTI */
230 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
231 armv8->cti_base + CTI_CTR, 1);
232 /* By default, gate all channel triggers to and from the CTM */
233 if (retval == ERROR_OK)
234 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
235 armv8->cti_base + CTI_GATE, 0);
236 /* output halt requests to PE on channel 0 trigger */
237 if (retval == ERROR_OK)
238 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
239 armv8->cti_base + CTI_OUTEN0, CTI_CHNL(0));
240 /* output restart requests to PE on channel 1 trigger */
241 if (retval == ERROR_OK)
242 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
243 armv8->cti_base + CTI_OUTEN1, CTI_CHNL(1));
244 if (retval != ERROR_OK)
245 return retval;
246
247 /* Resync breakpoint registers */
248
249 /* Since this is likely called from init or reset, update target state information*/
250 return aarch64_poll(target);
251 }
252
253 /* To reduce needless round-trips, pass in a pointer to the current
254 * DSCR value. Initialize it to zero if you just need to know the
255 * value on return from this function; or DSCR_ITE if you
256 * happen to know that no instruction is pending.
257 */
258 static int aarch64_exec_opcode(struct target *target,
259 uint32_t opcode, uint32_t *dscr_p)
260 {
261 uint32_t dscr;
262 int retval;
263 struct armv8_common *armv8 = target_to_armv8(target);
264 dscr = dscr_p ? *dscr_p : 0;
265
266 LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
267
268 /* Wait for InstrCompl bit to be set */
269 long long then = timeval_ms();
270 while ((dscr & DSCR_ITE) == 0) {
271 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
272 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
273 if (retval != ERROR_OK) {
274 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
275 return retval;
276 }
277 if (timeval_ms() > then + 1000) {
278 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
279 return ERROR_FAIL;
280 }
281 }
282
283 retval = mem_ap_write_u32(armv8->debug_ap,
284 armv8->debug_base + CPUV8_DBG_ITR, opcode);
285 if (retval != ERROR_OK)
286 return retval;
287
288 then = timeval_ms();
289 do {
290 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
291 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
292 if (retval != ERROR_OK) {
293 LOG_ERROR("Could not read DSCR register");
294 return retval;
295 }
296 if (timeval_ms() > then + 1000) {
297 LOG_ERROR("Timeout waiting for aarch64_exec_opcode");
298 return ERROR_FAIL;
299 }
300 } while ((dscr & DSCR_ITE) == 0); /* Wait for InstrCompl bit to be set */
301
302 if (dscr_p)
303 *dscr_p = dscr;
304
305 return retval;
306 }
307
308 /* Write to memory mapped registers directly with no cache or mmu handling */
309 static int aarch64_dap_write_memap_register_u32(struct target *target,
310 uint32_t address,
311 uint32_t value)
312 {
313 int retval;
314 struct armv8_common *armv8 = target_to_armv8(target);
315
316 retval = mem_ap_write_atomic_u32(armv8->debug_ap, address, value);
317
318 return retval;
319 }
320
321 /*
322 * AARCH64 implementation of Debug Programmer's Model
323 *
324 * NOTE the invariant: these routines return with DSCR_ITE set,
325 * so there's no need to poll for it before executing an instruction.
326 *
327 * NOTE that in several of these cases the "stall" mode might be useful.
328 * It'd let us queue a few operations together... prepare/finish might
329 * be the places to enable/disable that mode.
330 */
331
332 static inline struct aarch64_common *dpm_to_a8(struct arm_dpm *dpm)
333 {
334 return container_of(dpm, struct aarch64_common, armv8_common.dpm);
335 }
336
337 static int aarch64_write_dcc(struct armv8_common *armv8, uint32_t data)
338 {
339 LOG_DEBUG("write DCC 0x%08" PRIx32, data);
340 return mem_ap_write_u32(armv8->debug_ap,
341 armv8->debug_base + CPUV8_DBG_DTRRX, data);
342 }
343
344 static int aarch64_write_dcc_64(struct armv8_common *armv8, uint64_t data)
345 {
346 int ret;
347 LOG_DEBUG("write DCC Low word0x%08" PRIx32, (unsigned)data);
348 LOG_DEBUG("write DCC High word 0x%08" PRIx32, (unsigned)(data >> 32));
349 ret = mem_ap_write_u32(armv8->debug_ap,
350 armv8->debug_base + CPUV8_DBG_DTRRX, data);
351 ret += mem_ap_write_u32(armv8->debug_ap,
352 armv8->debug_base + CPUV8_DBG_DTRTX, data >> 32);
353 return ret;
354 }
355
356 static int aarch64_read_dcc(struct armv8_common *armv8, uint32_t *data,
357 uint32_t *dscr_p)
358 {
359 uint32_t dscr = DSCR_ITE;
360 int retval;
361
362 if (dscr_p)
363 dscr = *dscr_p;
364
365 /* Wait for DTRRXfull */
366 long long then = timeval_ms();
367 while ((dscr & DSCR_DTR_TX_FULL) == 0) {
368 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
369 armv8->debug_base + CPUV8_DBG_DSCR,
370 &dscr);
371 if (retval != ERROR_OK)
372 return retval;
373 if (timeval_ms() > then + 1000) {
374 LOG_ERROR("Timeout waiting for read dcc");
375 return ERROR_FAIL;
376 }
377 }
378
379 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
380 armv8->debug_base + CPUV8_DBG_DTRTX,
381 data);
382 if (retval != ERROR_OK)
383 return retval;
384 LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
385
386 if (dscr_p)
387 *dscr_p = dscr;
388
389 return retval;
390 }
391
392 static int aarch64_read_dcc_64(struct armv8_common *armv8, uint64_t *data,
393 uint32_t *dscr_p)
394 {
395 uint32_t dscr = DSCR_ITE;
396 uint32_t higher;
397 int retval;
398
399 if (dscr_p)
400 dscr = *dscr_p;
401
402 /* Wait for DTRRXfull */
403 long long then = timeval_ms();
404 while ((dscr & DSCR_DTR_TX_FULL) == 0) {
405 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
406 armv8->debug_base + CPUV8_DBG_DSCR,
407 &dscr);
408 if (retval != ERROR_OK)
409 return retval;
410 if (timeval_ms() > then + 1000) {
411 LOG_ERROR("Timeout waiting for read dcc");
412 return ERROR_FAIL;
413 }
414 }
415
416 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
417 armv8->debug_base + CPUV8_DBG_DTRTX,
418 (uint32_t *)data);
419 if (retval != ERROR_OK)
420 return retval;
421
422 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
423 armv8->debug_base + CPUV8_DBG_DTRRX,
424 &higher);
425 if (retval != ERROR_OK)
426 return retval;
427
428 *data = *(uint32_t *)data | (uint64_t)higher << 32;
429 LOG_DEBUG("read DCC 0x%16.16" PRIx64, *data);
430
431 if (dscr_p)
432 *dscr_p = dscr;
433
434 return retval;
435 }
436
437 static int aarch64_dpm_prepare(struct arm_dpm *dpm)
438 {
439 struct aarch64_common *a8 = dpm_to_a8(dpm);
440 uint32_t dscr;
441 int retval;
442
443 /* set up invariant: INSTR_COMP is set after ever DPM operation */
444 long long then = timeval_ms();
445 for (;; ) {
446 retval = mem_ap_read_atomic_u32(a8->armv8_common.debug_ap,
447 a8->armv8_common.debug_base + CPUV8_DBG_DSCR,
448 &dscr);
449 if (retval != ERROR_OK)
450 return retval;
451 if ((dscr & DSCR_ITE) != 0)
452 break;
453 if (timeval_ms() > then + 1000) {
454 LOG_ERROR("Timeout waiting for dpm prepare");
455 return ERROR_FAIL;
456 }
457 }
458
459 /* this "should never happen" ... */
460 if (dscr & DSCR_DTR_RX_FULL) {
461 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
462 /* Clear DCCRX */
463 retval = mem_ap_read_u32(a8->armv8_common.debug_ap,
464 a8->armv8_common.debug_base + CPUV8_DBG_DTRRX, &dscr);
465 if (retval != ERROR_OK)
466 return retval;
467
468 /* Clear sticky error */
469 retval = mem_ap_write_u32(a8->armv8_common.debug_ap,
470 a8->armv8_common.debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
471 if (retval != ERROR_OK)
472 return retval;
473 }
474
475 return retval;
476 }
477
478 static int aarch64_dpm_finish(struct arm_dpm *dpm)
479 {
480 /* REVISIT what could be done here? */
481 return ERROR_OK;
482 }
483
484 static int aarch64_instr_execute(struct arm_dpm *dpm,
485 uint32_t opcode)
486 {
487 struct aarch64_common *a8 = dpm_to_a8(dpm);
488 uint32_t dscr = DSCR_ITE;
489
490 return aarch64_exec_opcode(
491 a8->armv8_common.arm.target,
492 opcode,
493 &dscr);
494 }
495
496 static int aarch64_instr_write_data_dcc(struct arm_dpm *dpm,
497 uint32_t opcode, uint32_t data)
498 {
499 struct aarch64_common *a8 = dpm_to_a8(dpm);
500 int retval;
501 uint32_t dscr = DSCR_ITE;
502
503 retval = aarch64_write_dcc(&a8->armv8_common, data);
504 if (retval != ERROR_OK)
505 return retval;
506
507 return aarch64_exec_opcode(
508 a8->armv8_common.arm.target,
509 opcode,
510 &dscr);
511 }
512
513 static int aarch64_instr_write_data_dcc_64(struct arm_dpm *dpm,
514 uint32_t opcode, uint64_t data)
515 {
516 struct aarch64_common *a8 = dpm_to_a8(dpm);
517 int retval;
518 uint32_t dscr = DSCR_ITE;
519
520 retval = aarch64_write_dcc_64(&a8->armv8_common, data);
521 if (retval != ERROR_OK)
522 return retval;
523
524 return aarch64_exec_opcode(
525 a8->armv8_common.arm.target,
526 opcode,
527 &dscr);
528 }
529
530 static int aarch64_instr_write_data_r0(struct arm_dpm *dpm,
531 uint32_t opcode, uint32_t data)
532 {
533 struct aarch64_common *a8 = dpm_to_a8(dpm);
534 uint32_t dscr = DSCR_ITE;
535 int retval;
536
537 retval = aarch64_write_dcc(&a8->armv8_common, data);
538 if (retval != ERROR_OK)
539 return retval;
540
541 retval = aarch64_exec_opcode(
542 a8->armv8_common.arm.target,
543 ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 0),
544 &dscr);
545 if (retval != ERROR_OK)
546 return retval;
547
548 /* then the opcode, taking data from R0 */
549 retval = aarch64_exec_opcode(
550 a8->armv8_common.arm.target,
551 opcode,
552 &dscr);
553
554 return retval;
555 }
556
557 static int aarch64_instr_write_data_r0_64(struct arm_dpm *dpm,
558 uint32_t opcode, uint64_t data)
559 {
560 struct aarch64_common *a8 = dpm_to_a8(dpm);
561 uint32_t dscr = DSCR_ITE;
562 int retval;
563
564 retval = aarch64_write_dcc_64(&a8->armv8_common, data);
565 if (retval != ERROR_OK)
566 return retval;
567
568 retval = aarch64_exec_opcode(
569 a8->armv8_common.arm.target,
570 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0),
571 &dscr);
572 if (retval != ERROR_OK)
573 return retval;
574
575 /* then the opcode, taking data from R0 */
576 retval = aarch64_exec_opcode(
577 a8->armv8_common.arm.target,
578 opcode,
579 &dscr);
580
581 return retval;
582 }
583
584 static int aarch64_instr_cpsr_sync(struct arm_dpm *dpm)
585 {
586 struct target *target = dpm->arm->target;
587 uint32_t dscr = DSCR_ITE;
588
589 /* "Prefetch flush" after modifying execution status in CPSR */
590 return aarch64_exec_opcode(target,
591 DSB_SY,
592 &dscr);
593 }
594
595 static int aarch64_instr_read_data_dcc(struct arm_dpm *dpm,
596 uint32_t opcode, uint32_t *data)
597 {
598 struct aarch64_common *a8 = dpm_to_a8(dpm);
599 int retval;
600 uint32_t dscr = DSCR_ITE;
601
602 /* the opcode, writing data to DCC */
603 retval = aarch64_exec_opcode(
604 a8->armv8_common.arm.target,
605 opcode,
606 &dscr);
607 if (retval != ERROR_OK)
608 return retval;
609
610 return aarch64_read_dcc(&a8->armv8_common, data, &dscr);
611 }
612
613 static int aarch64_instr_read_data_dcc_64(struct arm_dpm *dpm,
614 uint32_t opcode, uint64_t *data)
615 {
616 struct aarch64_common *a8 = dpm_to_a8(dpm);
617 int retval;
618 uint32_t dscr = DSCR_ITE;
619
620 /* the opcode, writing data to DCC */
621 retval = aarch64_exec_opcode(
622 a8->armv8_common.arm.target,
623 opcode,
624 &dscr);
625 if (retval != ERROR_OK)
626 return retval;
627
628 return aarch64_read_dcc_64(&a8->armv8_common, data, &dscr);
629 }
630
631 static int aarch64_instr_read_data_r0(struct arm_dpm *dpm,
632 uint32_t opcode, uint32_t *data)
633 {
634 struct aarch64_common *a8 = dpm_to_a8(dpm);
635 uint32_t dscr = DSCR_ITE;
636 int retval;
637
638 /* the opcode, writing data to R0 */
639 retval = aarch64_exec_opcode(
640 a8->armv8_common.arm.target,
641 opcode,
642 &dscr);
643 if (retval != ERROR_OK)
644 return retval;
645
646 /* write R0 to DCC */
647 retval = aarch64_exec_opcode(
648 a8->armv8_common.arm.target,
649 ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 0), /* msr dbgdtr_el0, x0 */
650 &dscr);
651 if (retval != ERROR_OK)
652 return retval;
653
654 return aarch64_read_dcc(&a8->armv8_common, data, &dscr);
655 }
656
657 static int aarch64_instr_read_data_r0_64(struct arm_dpm *dpm,
658 uint32_t opcode, uint64_t *data)
659 {
660 struct aarch64_common *a8 = dpm_to_a8(dpm);
661 uint32_t dscr = DSCR_ITE;
662 int retval;
663
664 /* the opcode, writing data to R0 */
665 retval = aarch64_exec_opcode(
666 a8->armv8_common.arm.target,
667 opcode,
668 &dscr);
669 if (retval != ERROR_OK)
670 return retval;
671
672 /* write R0 to DCC */
673 retval = aarch64_exec_opcode(
674 a8->armv8_common.arm.target,
675 ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0), /* msr dbgdtr_el0, x0 */
676 &dscr);
677 if (retval != ERROR_OK)
678 return retval;
679
680 return aarch64_read_dcc_64(&a8->armv8_common, data, &dscr);
681 }
682
683 static int aarch64_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
684 uint32_t addr, uint32_t control)
685 {
686 struct aarch64_common *a8 = dpm_to_a8(dpm);
687 uint32_t vr = a8->armv8_common.debug_base;
688 uint32_t cr = a8->armv8_common.debug_base;
689 int retval;
690
691 switch (index_t) {
692 case 0 ... 15: /* breakpoints */
693 vr += CPUV8_DBG_BVR_BASE;
694 cr += CPUV8_DBG_BCR_BASE;
695 break;
696 case 16 ... 31: /* watchpoints */
697 vr += CPUV8_DBG_WVR_BASE;
698 cr += CPUV8_DBG_WCR_BASE;
699 index_t -= 16;
700 break;
701 default:
702 return ERROR_FAIL;
703 }
704 vr += 16 * index_t;
705 cr += 16 * index_t;
706
707 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
708 (unsigned) vr, (unsigned) cr);
709
710 retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
711 vr, addr);
712 if (retval != ERROR_OK)
713 return retval;
714 retval = aarch64_dap_write_memap_register_u32(dpm->arm->target,
715 cr, control);
716 return retval;
717 }
718
719 static int aarch64_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
720 {
721 struct aarch64_common *a = dpm_to_a8(dpm);
722 uint32_t cr;
723
724 switch (index_t) {
725 case 0 ... 15:
726 cr = a->armv8_common.debug_base + CPUV8_DBG_BCR_BASE;
727 break;
728 case 16 ... 31:
729 cr = a->armv8_common.debug_base + CPUV8_DBG_WCR_BASE;
730 index_t -= 16;
731 break;
732 default:
733 return ERROR_FAIL;
734 }
735 cr += 16 * index_t;
736
737 LOG_DEBUG("A: bpwp disable, cr %08x", (unsigned) cr);
738
739 /* clear control register */
740 return aarch64_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
741
742 }
743
744 static int aarch64_dpm_setup(struct aarch64_common *a8, uint64_t debug)
745 {
746 struct arm_dpm *dpm = &a8->armv8_common.dpm;
747 int retval;
748
749 dpm->arm = &a8->armv8_common.arm;
750 dpm->didr = debug;
751
752 dpm->prepare = aarch64_dpm_prepare;
753 dpm->finish = aarch64_dpm_finish;
754
755 dpm->instr_execute = aarch64_instr_execute;
756 dpm->instr_write_data_dcc = aarch64_instr_write_data_dcc;
757 dpm->instr_write_data_dcc_64 = aarch64_instr_write_data_dcc_64;
758 dpm->instr_write_data_r0 = aarch64_instr_write_data_r0;
759 dpm->instr_write_data_r0_64 = aarch64_instr_write_data_r0_64;
760 dpm->instr_cpsr_sync = aarch64_instr_cpsr_sync;
761
762 dpm->instr_read_data_dcc = aarch64_instr_read_data_dcc;
763 dpm->instr_read_data_dcc_64 = aarch64_instr_read_data_dcc_64;
764 dpm->instr_read_data_r0 = aarch64_instr_read_data_r0;
765 dpm->instr_read_data_r0_64 = aarch64_instr_read_data_r0_64;
766
767 dpm->arm_reg_current = armv8_reg_current;
768
769 dpm->bpwp_enable = aarch64_bpwp_enable;
770 dpm->bpwp_disable = aarch64_bpwp_disable;
771
772 retval = armv8_dpm_setup(dpm);
773 if (retval == ERROR_OK)
774 retval = armv8_dpm_initialize(dpm);
775
776 return retval;
777 }
778 static struct target *get_aarch64(struct target *target, int32_t coreid)
779 {
780 struct target_list *head;
781 struct target *curr;
782
783 head = target->head;
784 while (head != (struct target_list *)NULL) {
785 curr = head->target;
786 if ((curr->coreid == coreid) && (curr->state == TARGET_HALTED))
787 return curr;
788 head = head->next;
789 }
790 return target;
791 }
792 static int aarch64_halt(struct target *target);
793
794 static int aarch64_halt_smp(struct target *target)
795 {
796 int retval = ERROR_OK;
797 struct target_list *head = target->head;
798
799 while (head != (struct target_list *)NULL) {
800 struct target *curr = head->target;
801 struct armv8_common *armv8 = target_to_armv8(curr);
802
803 /* open the gate for channel 0 to let HALT requests pass to the CTM */
804 if (curr->smp)
805 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
806 armv8->cti_base + CTI_GATE, CTI_CHNL(0));
807 if (retval != ERROR_OK)
808 break;
809
810 head = head->next;
811 }
812
813 /* halt the target PE */
814 if (retval == ERROR_OK)
815 retval = aarch64_halt(target);
816
817 return retval;
818 }
819
820 static int update_halt_gdb(struct target *target)
821 {
822 int retval = 0;
823 if (target->gdb_service && target->gdb_service->core[0] == -1) {
824 target->gdb_service->target = target;
825 target->gdb_service->core[0] = target->coreid;
826 retval += aarch64_halt_smp(target);
827 }
828 return retval;
829 }
830
831 /*
832 * Cortex-A8 Run control
833 */
834
835 static int aarch64_poll(struct target *target)
836 {
837 int retval = ERROR_OK;
838 uint32_t dscr;
839 struct aarch64_common *aarch64 = target_to_aarch64(target);
840 struct armv8_common *armv8 = &aarch64->armv8_common;
841 enum target_state prev_target_state = target->state;
842 /* toggle to another core is done by gdb as follow */
843 /* maint packet J core_id */
844 /* continue */
845 /* the next polling trigger an halt event sent to gdb */
846 if ((target->state == TARGET_HALTED) && (target->smp) &&
847 (target->gdb_service) &&
848 (target->gdb_service->target == NULL)) {
849 target->gdb_service->target =
850 get_aarch64(target, target->gdb_service->core[1]);
851 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
852 return retval;
853 }
854 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
855 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
856 if (retval != ERROR_OK)
857 return retval;
858 aarch64->cpudbg_dscr = dscr;
859
860 if (DSCR_RUN_MODE(dscr) == 0x3) {
861 if (prev_target_state != TARGET_HALTED) {
862 /* We have a halting debug event */
863 LOG_DEBUG("Target halted");
864 target->state = TARGET_HALTED;
865 if ((prev_target_state == TARGET_RUNNING)
866 || (prev_target_state == TARGET_UNKNOWN)
867 || (prev_target_state == TARGET_RESET)) {
868 retval = aarch64_debug_entry(target);
869 if (retval != ERROR_OK)
870 return retval;
871 if (target->smp) {
872 retval = update_halt_gdb(target);
873 if (retval != ERROR_OK)
874 return retval;
875 }
876 target_call_event_callbacks(target,
877 TARGET_EVENT_HALTED);
878 }
879 if (prev_target_state == TARGET_DEBUG_RUNNING) {
880 LOG_DEBUG(" ");
881
882 retval = aarch64_debug_entry(target);
883 if (retval != ERROR_OK)
884 return retval;
885 if (target->smp) {
886 retval = update_halt_gdb(target);
887 if (retval != ERROR_OK)
888 return retval;
889 }
890
891 target_call_event_callbacks(target,
892 TARGET_EVENT_DEBUG_HALTED);
893 }
894 }
895 } else
896 target->state = TARGET_RUNNING;
897
898 return retval;
899 }
900
901 static int aarch64_halt(struct target *target)
902 {
903 int retval = ERROR_OK;
904 uint32_t dscr;
905 struct armv8_common *armv8 = target_to_armv8(target);
906
907 /*
908 * add HDE in halting debug mode
909 */
910 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
911 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
912 if (retval == ERROR_OK)
913 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
914 armv8->debug_base + CPUV8_DBG_DSCR, dscr | DSCR_HDE);
915 if (retval != ERROR_OK)
916 return retval;
917
918 /* trigger an event on channel 0, this outputs a halt request to the PE */
919 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
920 armv8->cti_base + CTI_APPPULSE, CTI_CHNL(0));
921 if (retval != ERROR_OK)
922 return retval;
923
924 long long then = timeval_ms();
925 for (;; ) {
926 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
927 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
928 if (retval != ERROR_OK)
929 return retval;
930 if ((dscr & DSCRV8_HALT_MASK) != 0)
931 break;
932 if (timeval_ms() > then + 1000) {
933 LOG_ERROR("Timeout waiting for halt");
934 return ERROR_FAIL;
935 }
936 }
937
938 target->debug_reason = DBG_REASON_DBGRQ;
939
940 return ERROR_OK;
941 }
942
943 static int aarch64_internal_restore(struct target *target, int current,
944 uint64_t *address, int handle_breakpoints, int debug_execution)
945 {
946 struct armv8_common *armv8 = target_to_armv8(target);
947 struct arm *arm = &armv8->arm;
948 int retval;
949 uint64_t resume_pc;
950
951 if (!debug_execution)
952 target_free_all_working_areas(target);
953
954 /* current = 1: continue on current pc, otherwise continue at <address> */
955 resume_pc = buf_get_u64(arm->pc->value, 0, 64);
956 if (!current)
957 resume_pc = *address;
958 else
959 *address = resume_pc;
960
961 /* Make sure that the Armv7 gdb thumb fixups does not
962 * kill the return address
963 */
964 switch (arm->core_state) {
965 case ARM_STATE_ARM:
966 resume_pc &= 0xFFFFFFFC;
967 break;
968 case ARM_STATE_AARCH64:
969 resume_pc &= 0xFFFFFFFFFFFFFFFC;
970 break;
971 case ARM_STATE_THUMB:
972 case ARM_STATE_THUMB_EE:
973 /* When the return address is loaded into PC
974 * bit 0 must be 1 to stay in Thumb state
975 */
976 resume_pc |= 0x1;
977 break;
978 case ARM_STATE_JAZELLE:
979 LOG_ERROR("How do I resume into Jazelle state??");
980 return ERROR_FAIL;
981 }
982 LOG_DEBUG("resume pc = 0x%16" PRIx64, resume_pc);
983 buf_set_u64(arm->pc->value, 0, 64, resume_pc);
984 arm->pc->dirty = 1;
985 arm->pc->valid = 1;
986 dpmv8_modeswitch(&armv8->dpm, ARM_MODE_ANY);
987
988 /* called it now before restoring context because it uses cpu
989 * register r0 for restoring system control register */
990 retval = aarch64_restore_system_control_reg(target);
991 if (retval != ERROR_OK)
992 return retval;
993 retval = aarch64_restore_context(target, handle_breakpoints);
994 if (retval != ERROR_OK)
995 return retval;
996 target->debug_reason = DBG_REASON_NOTHALTED;
997 target->state = TARGET_RUNNING;
998
999 /* registers are now invalid */
1000 register_cache_invalidate(arm->core_cache);
1001
1002 #if 0
1003 /* the front-end may request us not to handle breakpoints */
1004 if (handle_breakpoints) {
1005 /* Single step past breakpoint at current address */
1006 breakpoint = breakpoint_find(target, resume_pc);
1007 if (breakpoint) {
1008 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
1009 cortex_m3_unset_breakpoint(target, breakpoint);
1010 cortex_m3_single_step_core(target);
1011 cortex_m3_set_breakpoint(target, breakpoint);
1012 }
1013 }
1014 #endif
1015
1016 return retval;
1017 }
1018
1019 static int aarch64_internal_restart(struct target *target, bool slave_pe)
1020 {
1021 struct armv8_common *armv8 = target_to_armv8(target);
1022 struct arm *arm = &armv8->arm;
1023 int retval;
1024 uint32_t dscr;
1025 /*
1026 * * Restart core and wait for it to be started. Clear ITRen and sticky
1027 * * exception flags: see ARMv7 ARM, C5.9.
1028 *
1029 * REVISIT: for single stepping, we probably want to
1030 * disable IRQs by default, with optional override...
1031 */
1032
1033 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1034 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1035 if (retval != ERROR_OK)
1036 return retval;
1037
1038 if ((dscr & DSCR_ITE) == 0)
1039 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
1040
1041 /* make sure to acknowledge the halt event before resuming */
1042 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1043 armv8->cti_base + CTI_INACK, CTI_TRIG(HALT));
1044
1045 /*
1046 * open the CTI gate for channel 1 so that the restart events
1047 * get passed along to all PEs
1048 */
1049 if (retval == ERROR_OK)
1050 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1051 armv8->cti_base + CTI_GATE, CTI_CHNL(1));
1052 if (retval != ERROR_OK)
1053 return retval;
1054
1055 if (!slave_pe) {
1056 /* trigger an event on channel 1, generates a restart request to the PE */
1057 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1058 armv8->cti_base + CTI_APPPULSE, CTI_CHNL(1));
1059 if (retval != ERROR_OK)
1060 return retval;
1061
1062 long long then = timeval_ms();
1063 for (;; ) {
1064 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1065 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1066 if (retval != ERROR_OK)
1067 return retval;
1068 if ((dscr & DSCR_HDE) != 0)
1069 break;
1070 if (timeval_ms() > then + 1000) {
1071 LOG_ERROR("Timeout waiting for resume");
1072 return ERROR_FAIL;
1073 }
1074 }
1075 }
1076
1077 target->debug_reason = DBG_REASON_NOTHALTED;
1078 target->state = TARGET_RUNNING;
1079
1080 /* registers are now invalid */
1081 register_cache_invalidate(arm->core_cache);
1082
1083 return ERROR_OK;
1084 }
1085
1086 static int aarch64_restore_smp(struct target *target, int handle_breakpoints)
1087 {
1088 int retval = 0;
1089 struct target_list *head;
1090 struct target *curr;
1091 uint64_t address;
1092 head = target->head;
1093 while (head != (struct target_list *)NULL) {
1094 curr = head->target;
1095 if ((curr != target) && (curr->state != TARGET_RUNNING)) {
1096 /* resume current address , not in step mode */
1097 retval += aarch64_internal_restore(curr, 1, &address,
1098 handle_breakpoints, 0);
1099 retval += aarch64_internal_restart(curr, true);
1100 }
1101 head = head->next;
1102
1103 }
1104 return retval;
1105 }
1106
1107 static int aarch64_resume(struct target *target, int current,
1108 target_addr_t address, int handle_breakpoints, int debug_execution)
1109 {
1110 int retval = 0;
1111 uint64_t addr = address;
1112
1113 /* dummy resume for smp toggle in order to reduce gdb impact */
1114 if ((target->smp) && (target->gdb_service->core[1] != -1)) {
1115 /* simulate a start and halt of target */
1116 target->gdb_service->target = NULL;
1117 target->gdb_service->core[0] = target->gdb_service->core[1];
1118 /* fake resume at next poll we play the target core[1], see poll*/
1119 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1120 return 0;
1121 }
1122 aarch64_internal_restore(target, current, &addr, handle_breakpoints,
1123 debug_execution);
1124 if (target->smp) {
1125 target->gdb_service->core[0] = -1;
1126 retval = aarch64_restore_smp(target, handle_breakpoints);
1127 if (retval != ERROR_OK)
1128 return retval;
1129 }
1130 aarch64_internal_restart(target, false);
1131
1132 if (!debug_execution) {
1133 target->state = TARGET_RUNNING;
1134 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1135 LOG_DEBUG("target resumed at 0x%" PRIx64, addr);
1136 } else {
1137 target->state = TARGET_DEBUG_RUNNING;
1138 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1139 LOG_DEBUG("target debug resumed at 0x%" PRIx64, addr);
1140 }
1141
1142 return ERROR_OK;
1143 }
1144
1145 static int aarch64_debug_entry(struct target *target)
1146 {
1147 int retval = ERROR_OK;
1148 struct aarch64_common *aarch64 = target_to_aarch64(target);
1149 struct armv8_common *armv8 = target_to_armv8(target);
1150
1151 LOG_DEBUG("dscr = 0x%08" PRIx32, aarch64->cpudbg_dscr);
1152
1153 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
1154 * imprecise data aborts get discarded by issuing a Data
1155 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
1156 */
1157
1158 /* make sure to clear all sticky errors */
1159 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1160 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1161 if (retval != ERROR_OK)
1162 return retval;
1163
1164 /* Examine debug reason */
1165 armv8_dpm_report_dscr(&armv8->dpm, aarch64->cpudbg_dscr);
1166
1167 /* save address of instruction that triggered the watchpoint? */
1168 if (target->debug_reason == DBG_REASON_WATCHPOINT) {
1169 uint32_t tmp;
1170 uint64_t wfar = 0;
1171
1172 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1173 armv8->debug_base + CPUV8_DBG_WFAR1,
1174 &tmp);
1175 if (retval != ERROR_OK)
1176 return retval;
1177 wfar = tmp;
1178 wfar = (wfar << 32);
1179 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1180 armv8->debug_base + CPUV8_DBG_WFAR0,
1181 &tmp);
1182 if (retval != ERROR_OK)
1183 return retval;
1184 wfar |= tmp;
1185 armv8_dpm_report_wfar(&armv8->dpm, wfar);
1186 }
1187
1188 retval = armv8_dpm_read_current_registers(&armv8->dpm);
1189
1190 if (armv8->post_debug_entry) {
1191 retval = armv8->post_debug_entry(target);
1192 if (retval != ERROR_OK)
1193 return retval;
1194 }
1195
1196 return retval;
1197 }
1198
1199 static int aarch64_post_debug_entry(struct target *target)
1200 {
1201 struct aarch64_common *aarch64 = target_to_aarch64(target);
1202 struct armv8_common *armv8 = &aarch64->armv8_common;
1203 int retval;
1204
1205 mem_ap_write_atomic_u32(armv8->debug_ap,
1206 armv8->debug_base + CPUV8_DBG_DRCR, 1<<2);
1207 switch (armv8->arm.core_mode) {
1208 case ARMV8_64_EL0T:
1209 case ARMV8_64_EL1T:
1210 case ARMV8_64_EL1H:
1211 retval = armv8->arm.mrs(target, 3, /*op 0*/
1212 0, 0, /* op1, op2 */
1213 1, 0, /* CRn, CRm */
1214 &aarch64->system_control_reg);
1215 if (retval != ERROR_OK)
1216 return retval;
1217 break;
1218 case ARMV8_64_EL2T:
1219 case ARMV8_64_EL2H:
1220 retval = armv8->arm.mrs(target, 3, /*op 0*/
1221 4, 0, /* op1, op2 */
1222 1, 0, /* CRn, CRm */
1223 &aarch64->system_control_reg);
1224 if (retval != ERROR_OK)
1225 return retval;
1226 break;
1227 case ARMV8_64_EL3H:
1228 case ARMV8_64_EL3T:
1229 retval = armv8->arm.mrs(target, 3, /*op 0*/
1230 6, 0, /* op1, op2 */
1231 1, 0, /* CRn, CRm */
1232 &aarch64->system_control_reg);
1233 if (retval != ERROR_OK)
1234 return retval;
1235 break;
1236 default:
1237 LOG_DEBUG("unknow cpu state 0x%x" PRIx32, armv8->arm.core_state);
1238 }
1239 LOG_DEBUG("System_register: %8.8" PRIx32, aarch64->system_control_reg);
1240 aarch64->system_control_reg_curr = aarch64->system_control_reg;
1241
1242 if (armv8->armv8_mmu.armv8_cache.ctype == -1)
1243 armv8_identify_cache(target);
1244
1245 armv8->armv8_mmu.mmu_enabled =
1246 (aarch64->system_control_reg & 0x1U) ? 1 : 0;
1247 armv8->armv8_mmu.armv8_cache.d_u_cache_enabled =
1248 (aarch64->system_control_reg & 0x4U) ? 1 : 0;
1249 armv8->armv8_mmu.armv8_cache.i_cache_enabled =
1250 (aarch64->system_control_reg & 0x1000U) ? 1 : 0;
1251 aarch64->curr_mode = armv8->arm.core_mode;
1252 return ERROR_OK;
1253 }
1254
1255 static int aarch64_set_dscr_bits(struct target *target, unsigned long bit_mask, unsigned long value)
1256 {
1257 struct armv8_common *armv8 = target_to_armv8(target);
1258 uint32_t dscr;
1259
1260 /* Read DSCR */
1261 int retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1262 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1263 if (ERROR_OK != retval)
1264 return retval;
1265
1266 /* clear bitfield */
1267 dscr &= ~bit_mask;
1268 /* put new value */
1269 dscr |= value & bit_mask;
1270
1271 /* write new DSCR */
1272 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1273 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1274 return retval;
1275 }
1276
1277 static int aarch64_step(struct target *target, int current, target_addr_t address,
1278 int handle_breakpoints)
1279 {
1280 struct armv8_common *armv8 = target_to_armv8(target);
1281 int retval;
1282 uint32_t edecr;
1283
1284 if (target->state != TARGET_HALTED) {
1285 LOG_WARNING("target not halted");
1286 return ERROR_TARGET_NOT_HALTED;
1287 }
1288
1289 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1290 armv8->debug_base + CPUV8_DBG_EDECR, &edecr);
1291 if (retval != ERROR_OK)
1292 return retval;
1293
1294 /* make sure EDECR.SS is not set when restoring the register */
1295 edecr &= ~0x4;
1296
1297 /* set EDECR.SS to enter hardware step mode */
1298 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1299 armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4));
1300 if (retval != ERROR_OK)
1301 return retval;
1302
1303 /* disable interrupts while stepping */
1304 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0x3 << 22);
1305 if (retval != ERROR_OK)
1306 return ERROR_OK;
1307
1308 /* resume the target */
1309 retval = aarch64_resume(target, current, address, 0, 0);
1310 if (retval != ERROR_OK)
1311 return retval;
1312
1313 long long then = timeval_ms();
1314 while (target->state != TARGET_HALTED) {
1315 retval = aarch64_poll(target);
1316 if (retval != ERROR_OK)
1317 return retval;
1318 if (timeval_ms() > then + 1000) {
1319 LOG_ERROR("timeout waiting for target halt");
1320 return ERROR_FAIL;
1321 }
1322 }
1323
1324 /* restore EDECR */
1325 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1326 armv8->debug_base + CPUV8_DBG_EDECR, edecr);
1327 if (retval != ERROR_OK)
1328 return retval;
1329
1330 /* restore interrupts */
1331 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0);
1332 if (retval != ERROR_OK)
1333 return ERROR_OK;
1334
1335 return ERROR_OK;
1336 }
1337
1338 static int aarch64_restore_context(struct target *target, bool bpwp)
1339 {
1340 struct armv8_common *armv8 = target_to_armv8(target);
1341
1342 LOG_DEBUG(" ");
1343
1344 if (armv8->pre_restore_context)
1345 armv8->pre_restore_context(target);
1346
1347 return armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
1348
1349 }
1350
1351 /*
1352 * Cortex-A8 Breakpoint and watchpoint functions
1353 */
1354
1355 /* Setup hardware Breakpoint Register Pair */
1356 static int aarch64_set_breakpoint(struct target *target,
1357 struct breakpoint *breakpoint, uint8_t matchmode)
1358 {
1359 int retval;
1360 int brp_i = 0;
1361 uint32_t control;
1362 uint8_t byte_addr_select = 0x0F;
1363 struct aarch64_common *aarch64 = target_to_aarch64(target);
1364 struct armv8_common *armv8 = &aarch64->armv8_common;
1365 struct aarch64_brp *brp_list = aarch64->brp_list;
1366 uint32_t dscr;
1367
1368 if (breakpoint->set) {
1369 LOG_WARNING("breakpoint already set");
1370 return ERROR_OK;
1371 }
1372
1373 if (breakpoint->type == BKPT_HARD) {
1374 int64_t bpt_value;
1375 while (brp_list[brp_i].used && (brp_i < aarch64->brp_num))
1376 brp_i++;
1377 if (brp_i >= aarch64->brp_num) {
1378 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1379 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1380 }
1381 breakpoint->set = brp_i + 1;
1382 if (breakpoint->length == 2)
1383 byte_addr_select = (3 << (breakpoint->address & 0x02));
1384 control = ((matchmode & 0x7) << 20)
1385 | (1 << 13)
1386 | (byte_addr_select << 5)
1387 | (3 << 1) | 1;
1388 brp_list[brp_i].used = 1;
1389 brp_list[brp_i].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1390 brp_list[brp_i].control = control;
1391 bpt_value = brp_list[brp_i].value;
1392
1393 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1394 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1395 (uint32_t)(bpt_value & 0xFFFFFFFF));
1396 if (retval != ERROR_OK)
1397 return retval;
1398 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1399 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1400 (uint32_t)(bpt_value >> 32));
1401 if (retval != ERROR_OK)
1402 return retval;
1403
1404 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1405 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1406 brp_list[brp_i].control);
1407 if (retval != ERROR_OK)
1408 return retval;
1409 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1410 brp_list[brp_i].control,
1411 brp_list[brp_i].value);
1412
1413 } else if (breakpoint->type == BKPT_SOFT) {
1414 uint8_t code[4];
1415
1416 buf_set_u32(code, 0, 32, ARMV8_HLT(0x11));
1417 retval = target_read_memory(target,
1418 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1419 breakpoint->length, 1,
1420 breakpoint->orig_instr);
1421 if (retval != ERROR_OK)
1422 return retval;
1423
1424 armv8_cache_d_inner_flush_virt(armv8,
1425 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1426 breakpoint->length);
1427
1428 retval = target_write_memory(target,
1429 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1430 breakpoint->length, 1, code);
1431 if (retval != ERROR_OK)
1432 return retval;
1433
1434 armv8_cache_d_inner_flush_virt(armv8,
1435 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1436 breakpoint->length);
1437
1438 armv8_cache_i_inner_inval_virt(armv8,
1439 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1440 breakpoint->length);
1441
1442 breakpoint->set = 0x11; /* Any nice value but 0 */
1443 }
1444
1445 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1446 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1447 /* Ensure that halting debug mode is enable */
1448 dscr = dscr | DSCR_HDE;
1449 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1450 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1451 if (retval != ERROR_OK) {
1452 LOG_DEBUG("Failed to set DSCR.HDE");
1453 return retval;
1454 }
1455
1456 return ERROR_OK;
1457 }
1458
1459 static int aarch64_set_context_breakpoint(struct target *target,
1460 struct breakpoint *breakpoint, uint8_t matchmode)
1461 {
1462 int retval = ERROR_FAIL;
1463 int brp_i = 0;
1464 uint32_t control;
1465 uint8_t byte_addr_select = 0x0F;
1466 struct aarch64_common *aarch64 = target_to_aarch64(target);
1467 struct armv8_common *armv8 = &aarch64->armv8_common;
1468 struct aarch64_brp *brp_list = aarch64->brp_list;
1469
1470 if (breakpoint->set) {
1471 LOG_WARNING("breakpoint already set");
1472 return retval;
1473 }
1474 /*check available context BRPs*/
1475 while ((brp_list[brp_i].used ||
1476 (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < aarch64->brp_num))
1477 brp_i++;
1478
1479 if (brp_i >= aarch64->brp_num) {
1480 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1481 return ERROR_FAIL;
1482 }
1483
1484 breakpoint->set = brp_i + 1;
1485 control = ((matchmode & 0x7) << 20)
1486 | (1 << 13)
1487 | (byte_addr_select << 5)
1488 | (3 << 1) | 1;
1489 brp_list[brp_i].used = 1;
1490 brp_list[brp_i].value = (breakpoint->asid);
1491 brp_list[brp_i].control = control;
1492 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1493 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1494 brp_list[brp_i].value);
1495 if (retval != ERROR_OK)
1496 return retval;
1497 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1498 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1499 brp_list[brp_i].control);
1500 if (retval != ERROR_OK)
1501 return retval;
1502 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1503 brp_list[brp_i].control,
1504 brp_list[brp_i].value);
1505 return ERROR_OK;
1506
1507 }
1508
1509 static int aarch64_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
1510 {
1511 int retval = ERROR_FAIL;
1512 int brp_1 = 0; /* holds the contextID pair */
1513 int brp_2 = 0; /* holds the IVA pair */
1514 uint32_t control_CTX, control_IVA;
1515 uint8_t CTX_byte_addr_select = 0x0F;
1516 uint8_t IVA_byte_addr_select = 0x0F;
1517 uint8_t CTX_machmode = 0x03;
1518 uint8_t IVA_machmode = 0x01;
1519 struct aarch64_common *aarch64 = target_to_aarch64(target);
1520 struct armv8_common *armv8 = &aarch64->armv8_common;
1521 struct aarch64_brp *brp_list = aarch64->brp_list;
1522
1523 if (breakpoint->set) {
1524 LOG_WARNING("breakpoint already set");
1525 return retval;
1526 }
1527 /*check available context BRPs*/
1528 while ((brp_list[brp_1].used ||
1529 (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < aarch64->brp_num))
1530 brp_1++;
1531
1532 printf("brp(CTX) found num: %d\n", brp_1);
1533 if (brp_1 >= aarch64->brp_num) {
1534 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1535 return ERROR_FAIL;
1536 }
1537
1538 while ((brp_list[brp_2].used ||
1539 (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < aarch64->brp_num))
1540 brp_2++;
1541
1542 printf("brp(IVA) found num: %d\n", brp_2);
1543 if (brp_2 >= aarch64->brp_num) {
1544 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1545 return ERROR_FAIL;
1546 }
1547
1548 breakpoint->set = brp_1 + 1;
1549 breakpoint->linked_BRP = brp_2;
1550 control_CTX = ((CTX_machmode & 0x7) << 20)
1551 | (brp_2 << 16)
1552 | (0 << 14)
1553 | (CTX_byte_addr_select << 5)
1554 | (3 << 1) | 1;
1555 brp_list[brp_1].used = 1;
1556 brp_list[brp_1].value = (breakpoint->asid);
1557 brp_list[brp_1].control = control_CTX;
1558 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1559 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_1].BRPn,
1560 brp_list[brp_1].value);
1561 if (retval != ERROR_OK)
1562 return retval;
1563 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1564 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_1].BRPn,
1565 brp_list[brp_1].control);
1566 if (retval != ERROR_OK)
1567 return retval;
1568
1569 control_IVA = ((IVA_machmode & 0x7) << 20)
1570 | (brp_1 << 16)
1571 | (1 << 13)
1572 | (IVA_byte_addr_select << 5)
1573 | (3 << 1) | 1;
1574 brp_list[brp_2].used = 1;
1575 brp_list[brp_2].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1576 brp_list[brp_2].control = control_IVA;
1577 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1578 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_2].BRPn,
1579 brp_list[brp_2].value & 0xFFFFFFFF);
1580 if (retval != ERROR_OK)
1581 return retval;
1582 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1583 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_2].BRPn,
1584 brp_list[brp_2].value >> 32);
1585 if (retval != ERROR_OK)
1586 return retval;
1587 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1588 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_2].BRPn,
1589 brp_list[brp_2].control);
1590 if (retval != ERROR_OK)
1591 return retval;
1592
1593 return ERROR_OK;
1594 }
1595
1596 static int aarch64_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1597 {
1598 int retval;
1599 struct aarch64_common *aarch64 = target_to_aarch64(target);
1600 struct armv8_common *armv8 = &aarch64->armv8_common;
1601 struct aarch64_brp *brp_list = aarch64->brp_list;
1602
1603 if (!breakpoint->set) {
1604 LOG_WARNING("breakpoint not set");
1605 return ERROR_OK;
1606 }
1607
1608 if (breakpoint->type == BKPT_HARD) {
1609 if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
1610 int brp_i = breakpoint->set - 1;
1611 int brp_j = breakpoint->linked_BRP;
1612 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1613 LOG_DEBUG("Invalid BRP number in breakpoint");
1614 return ERROR_OK;
1615 }
1616 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1617 brp_list[brp_i].control, brp_list[brp_i].value);
1618 brp_list[brp_i].used = 0;
1619 brp_list[brp_i].value = 0;
1620 brp_list[brp_i].control = 0;
1621 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1622 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1623 brp_list[brp_i].control);
1624 if (retval != ERROR_OK)
1625 return retval;
1626 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1627 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1628 (uint32_t)brp_list[brp_i].value);
1629 if (retval != ERROR_OK)
1630 return retval;
1631 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1632 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1633 (uint32_t)brp_list[brp_i].value);
1634 if (retval != ERROR_OK)
1635 return retval;
1636 if ((brp_j < 0) || (brp_j >= aarch64->brp_num)) {
1637 LOG_DEBUG("Invalid BRP number in breakpoint");
1638 return ERROR_OK;
1639 }
1640 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_j,
1641 brp_list[brp_j].control, brp_list[brp_j].value);
1642 brp_list[brp_j].used = 0;
1643 brp_list[brp_j].value = 0;
1644 brp_list[brp_j].control = 0;
1645 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1646 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_j].BRPn,
1647 brp_list[brp_j].control);
1648 if (retval != ERROR_OK)
1649 return retval;
1650 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1651 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_j].BRPn,
1652 (uint32_t)brp_list[brp_j].value);
1653 if (retval != ERROR_OK)
1654 return retval;
1655 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1656 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_j].BRPn,
1657 (uint32_t)brp_list[brp_j].value);
1658 if (retval != ERROR_OK)
1659 return retval;
1660
1661 breakpoint->linked_BRP = 0;
1662 breakpoint->set = 0;
1663 return ERROR_OK;
1664
1665 } else {
1666 int brp_i = breakpoint->set - 1;
1667 if ((brp_i < 0) || (brp_i >= aarch64->brp_num)) {
1668 LOG_DEBUG("Invalid BRP number in breakpoint");
1669 return ERROR_OK;
1670 }
1671 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_i,
1672 brp_list[brp_i].control, brp_list[brp_i].value);
1673 brp_list[brp_i].used = 0;
1674 brp_list[brp_i].value = 0;
1675 brp_list[brp_i].control = 0;
1676 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1677 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].BRPn,
1678 brp_list[brp_i].control);
1679 if (retval != ERROR_OK)
1680 return retval;
1681 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1682 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].BRPn,
1683 brp_list[brp_i].value);
1684 if (retval != ERROR_OK)
1685 return retval;
1686
1687 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1688 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].BRPn,
1689 (uint32_t)brp_list[brp_i].value);
1690 if (retval != ERROR_OK)
1691 return retval;
1692 breakpoint->set = 0;
1693 return ERROR_OK;
1694 }
1695 } else {
1696 /* restore original instruction (kept in target endianness) */
1697
1698 armv8_cache_d_inner_flush_virt(armv8,
1699 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1700 breakpoint->length);
1701
1702 if (breakpoint->length == 4) {
1703 retval = target_write_memory(target,
1704 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1705 4, 1, breakpoint->orig_instr);
1706 if (retval != ERROR_OK)
1707 return retval;
1708 } else {
1709 retval = target_write_memory(target,
1710 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1711 2, 1, breakpoint->orig_instr);
1712 if (retval != ERROR_OK)
1713 return retval;
1714 }
1715
1716 armv8_cache_d_inner_flush_virt(armv8,
1717 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1718 breakpoint->length);
1719
1720 armv8_cache_i_inner_inval_virt(armv8,
1721 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1722 breakpoint->length);
1723 }
1724 breakpoint->set = 0;
1725
1726 return ERROR_OK;
1727 }
1728
1729 static int aarch64_add_breakpoint(struct target *target,
1730 struct breakpoint *breakpoint)
1731 {
1732 struct aarch64_common *aarch64 = target_to_aarch64(target);
1733
1734 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1735 LOG_INFO("no hardware breakpoint available");
1736 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1737 }
1738
1739 if (breakpoint->type == BKPT_HARD)
1740 aarch64->brp_num_available--;
1741
1742 return aarch64_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1743 }
1744
1745 static int aarch64_add_context_breakpoint(struct target *target,
1746 struct breakpoint *breakpoint)
1747 {
1748 struct aarch64_common *aarch64 = target_to_aarch64(target);
1749
1750 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1751 LOG_INFO("no hardware breakpoint available");
1752 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1753 }
1754
1755 if (breakpoint->type == BKPT_HARD)
1756 aarch64->brp_num_available--;
1757
1758 return aarch64_set_context_breakpoint(target, breakpoint, 0x02); /* asid match */
1759 }
1760
1761 static int aarch64_add_hybrid_breakpoint(struct target *target,
1762 struct breakpoint *breakpoint)
1763 {
1764 struct aarch64_common *aarch64 = target_to_aarch64(target);
1765
1766 if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1767 LOG_INFO("no hardware breakpoint available");
1768 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1769 }
1770
1771 if (breakpoint->type == BKPT_HARD)
1772 aarch64->brp_num_available--;
1773
1774 return aarch64_set_hybrid_breakpoint(target, breakpoint); /* ??? */
1775 }
1776
1777
1778 static int aarch64_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1779 {
1780 struct aarch64_common *aarch64 = target_to_aarch64(target);
1781
1782 #if 0
1783 /* It is perfectly possible to remove breakpoints while the target is running */
1784 if (target->state != TARGET_HALTED) {
1785 LOG_WARNING("target not halted");
1786 return ERROR_TARGET_NOT_HALTED;
1787 }
1788 #endif
1789
1790 if (breakpoint->set) {
1791 aarch64_unset_breakpoint(target, breakpoint);
1792 if (breakpoint->type == BKPT_HARD)
1793 aarch64->brp_num_available++;
1794 }
1795
1796 return ERROR_OK;
1797 }
1798
1799 /*
1800 * Cortex-A8 Reset functions
1801 */
1802
1803 static int aarch64_assert_reset(struct target *target)
1804 {
1805 struct armv8_common *armv8 = target_to_armv8(target);
1806
1807 LOG_DEBUG(" ");
1808
1809 /* FIXME when halt is requested, make it work somehow... */
1810
1811 /* Issue some kind of warm reset. */
1812 if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
1813 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1814 else if (jtag_get_reset_config() & RESET_HAS_SRST) {
1815 /* REVISIT handle "pulls" cases, if there's
1816 * hardware that needs them to work.
1817 */
1818 jtag_add_reset(0, 1);
1819 } else {
1820 LOG_ERROR("%s: how to reset?", target_name(target));
1821 return ERROR_FAIL;
1822 }
1823
1824 /* registers are now invalid */
1825 register_cache_invalidate(armv8->arm.core_cache);
1826
1827 target->state = TARGET_RESET;
1828
1829 return ERROR_OK;
1830 }
1831
1832 static int aarch64_deassert_reset(struct target *target)
1833 {
1834 int retval;
1835
1836 LOG_DEBUG(" ");
1837
1838 /* be certain SRST is off */
1839 jtag_add_reset(0, 0);
1840
1841 retval = aarch64_poll(target);
1842 if (retval != ERROR_OK)
1843 return retval;
1844
1845 if (target->reset_halt) {
1846 if (target->state != TARGET_HALTED) {
1847 LOG_WARNING("%s: ran after reset and before halt ...",
1848 target_name(target));
1849 retval = target_halt(target);
1850 if (retval != ERROR_OK)
1851 return retval;
1852 }
1853 }
1854
1855 return ERROR_OK;
1856 }
1857
1858 static int aarch64_write_apb_ap_memory(struct target *target,
1859 uint64_t address, uint32_t size,
1860 uint32_t count, const uint8_t *buffer)
1861 {
1862 /* write memory through APB-AP */
1863 int retval = ERROR_COMMAND_SYNTAX_ERROR;
1864 struct armv8_common *armv8 = target_to_armv8(target);
1865 struct arm *arm = &armv8->arm;
1866 int total_bytes = count * size;
1867 int total_u32;
1868 int start_byte = address & 0x3;
1869 int end_byte = (address + total_bytes) & 0x3;
1870 struct reg *reg;
1871 uint32_t dscr;
1872 uint8_t *tmp_buff = NULL;
1873
1874 LOG_DEBUG("Writing APB-AP memory address 0x%" PRIx64 " size %" PRIu32 " count%" PRIu32,
1875 address, size, count);
1876 if (target->state != TARGET_HALTED) {
1877 LOG_WARNING("target not halted");
1878 return ERROR_TARGET_NOT_HALTED;
1879 }
1880
1881 total_u32 = DIV_ROUND_UP((address & 3) + total_bytes, 4);
1882
1883 /* Mark register R0 as dirty, as it will be used
1884 * for transferring the data.
1885 * It will be restored automatically when exiting
1886 * debug mode
1887 */
1888 reg = armv8_reg_current(arm, 1);
1889 reg->dirty = true;
1890
1891 reg = armv8_reg_current(arm, 0);
1892 reg->dirty = true;
1893
1894 /* clear any abort */
1895 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1896 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1897 if (retval != ERROR_OK)
1898 return retval;
1899
1900
1901 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
1902
1903 /* The algorithm only copies 32 bit words, so the buffer
1904 * should be expanded to include the words at either end.
1905 * The first and last words will be read first to avoid
1906 * corruption if needed.
1907 */
1908 tmp_buff = malloc(total_u32 * 4);
1909
1910 if ((start_byte != 0) && (total_u32 > 1)) {
1911 /* First bytes not aligned - read the 32 bit word to avoid corrupting
1912 * the other bytes in the word.
1913 */
1914 retval = aarch64_read_apb_ap_memory(target, (address & ~0x3), 4, 1, tmp_buff);
1915 if (retval != ERROR_OK)
1916 goto error_free_buff_w;
1917 }
1918
1919 /* If end of write is not aligned, or the write is less than 4 bytes */
1920 if ((end_byte != 0) ||
1921 ((total_u32 == 1) && (total_bytes != 4))) {
1922
1923 /* Read the last word to avoid corruption during 32 bit write */
1924 int mem_offset = (total_u32-1) * 4;
1925 retval = aarch64_read_apb_ap_memory(target, (address & ~0x3) + mem_offset, 4, 1, &tmp_buff[mem_offset]);
1926 if (retval != ERROR_OK)
1927 goto error_free_buff_w;
1928 }
1929
1930 /* Copy the write buffer over the top of the temporary buffer */
1931 memcpy(&tmp_buff[start_byte], buffer, total_bytes);
1932
1933 /* We now have a 32 bit aligned buffer that can be written */
1934
1935 /* Read DSCR */
1936 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1937 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1938 if (retval != ERROR_OK)
1939 goto error_free_buff_w;
1940
1941 /* Set Normal access mode */
1942 dscr = (dscr & ~DSCR_MA);
1943 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1944 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1945
1946 if (arm->core_state == ARM_STATE_AARCH64) {
1947 /* Write X0 with value 'address' using write procedure */
1948 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
1949 retval += aarch64_write_dcc_64(armv8, address & ~0x3ULL);
1950 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
1951 retval += aarch64_exec_opcode(target,
1952 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
1953 } else {
1954 /* Write R0 with value 'address' using write procedure */
1955 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
1956 retval += aarch64_write_dcc(armv8, address & ~0x3ULL);
1957 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
1958 retval += aarch64_exec_opcode(target,
1959 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr);
1960
1961 }
1962 /* Step 1.d - Change DCC to memory mode */
1963 dscr = dscr | DSCR_MA;
1964 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
1965 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
1966 if (retval != ERROR_OK)
1967 goto error_unset_dtr_w;
1968
1969
1970 /* Step 2.a - Do the write */
1971 retval = mem_ap_write_buf_noincr(armv8->debug_ap,
1972 tmp_buff, 4, total_u32, armv8->debug_base + CPUV8_DBG_DTRRX);
1973 if (retval != ERROR_OK)
1974 goto error_unset_dtr_w;
1975
1976 /* Step 3.a - Switch DTR mode back to Normal mode */
1977 dscr = (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 goto error_unset_dtr_w;
1982
1983 /* Check for sticky abort flags in the DSCR */
1984 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1985 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
1986 if (retval != ERROR_OK)
1987 goto error_free_buff_w;
1988 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
1989 /* Abort occurred - clear it and exit */
1990 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
1991 mem_ap_write_atomic_u32(armv8->debug_ap,
1992 armv8->debug_base + CPUV8_DBG_DRCR, 1<<2);
1993 goto error_free_buff_w;
1994 }
1995
1996 /* Done */
1997 free(tmp_buff);
1998 return ERROR_OK;
1999
2000 error_unset_dtr_w:
2001 /* Unset DTR mode */
2002 mem_ap_read_atomic_u32(armv8->debug_ap,
2003 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2004 dscr = (dscr & ~DSCR_MA);
2005 mem_ap_write_atomic_u32(armv8->debug_ap,
2006 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2007 error_free_buff_w:
2008 LOG_ERROR("error");
2009 free(tmp_buff);
2010 return ERROR_FAIL;
2011 }
2012
2013 static int aarch64_read_apb_ap_memory(struct target *target,
2014 target_addr_t address, uint32_t size,
2015 uint32_t count, uint8_t *buffer)
2016 {
2017 /* read memory through APB-AP */
2018 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2019 struct armv8_common *armv8 = target_to_armv8(target);
2020 struct arm *arm = &armv8->arm;
2021 int total_bytes = count * size;
2022 int total_u32;
2023 int start_byte = address & 0x3;
2024 int end_byte = (address + total_bytes) & 0x3;
2025 struct reg *reg;
2026 uint32_t dscr;
2027 uint8_t *tmp_buff = NULL;
2028 uint8_t *u8buf_ptr;
2029 uint32_t value;
2030
2031 LOG_DEBUG("Reading APB-AP memory address 0x%" TARGET_PRIxADDR " size %" PRIu32 " count%" PRIu32,
2032 address, size, count);
2033 if (target->state != TARGET_HALTED) {
2034 LOG_WARNING("target not halted");
2035 return ERROR_TARGET_NOT_HALTED;
2036 }
2037
2038 total_u32 = DIV_ROUND_UP((address & 3) + total_bytes, 4);
2039 /* Mark register X0, X1 as dirty, as it will be used
2040 * for transferring the data.
2041 * It will be restored automatically when exiting
2042 * debug mode
2043 */
2044 reg = armv8_reg_current(arm, 1);
2045 reg->dirty = true;
2046
2047 reg = armv8_reg_current(arm, 0);
2048 reg->dirty = true;
2049
2050 /* clear any abort */
2051 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2052 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
2053 if (retval != ERROR_OK)
2054 goto error_free_buff_r;
2055
2056 /* Read DSCR */
2057 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2058 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2059
2060 /* This algorithm comes from DDI0487A.g, chapter J9.1 */
2061
2062 /* Set Normal access mode */
2063 dscr = (dscr & ~DSCR_MA);
2064 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
2065 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2066
2067 if (arm->core_state == ARM_STATE_AARCH64) {
2068 /* Write X0 with value 'address' using write procedure */
2069 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
2070 retval += aarch64_write_dcc_64(armv8, address & ~0x3ULL);
2071 /* Step 1.c - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
2072 retval += aarch64_exec_opcode(target, ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
2073 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2074 retval += aarch64_exec_opcode(target, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0), &dscr);
2075 /* Step 1.e - Change DCC to memory mode */
2076 dscr = dscr | DSCR_MA;
2077 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
2078 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2079 /* Step 1.f - read DBGDTRTX and discard the value */
2080 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
2081 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2082 } else {
2083 /* Write R0 with value 'address' using write procedure */
2084 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
2085 retval += aarch64_write_dcc(armv8, address & ~0x3ULL);
2086 /* Step 1.c - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
2087 retval += aarch64_exec_opcode(target,
2088 T32_FMTITR(ARMV4_5_MRC(14, 0, 0, 0, 5, 0)), &dscr);
2089 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2090 retval += aarch64_exec_opcode(target,
2091 T32_FMTITR(ARMV4_5_MCR(14, 0, 0, 0, 5, 0)), &dscr);
2092 /* Step 1.e - Change DCC to memory mode */
2093 dscr = dscr | DSCR_MA;
2094 retval += mem_ap_write_atomic_u32(armv8->debug_ap,
2095 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2096 /* Step 1.f - read DBGDTRTX and discard the value */
2097 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
2098 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2099
2100 }
2101 if (retval != ERROR_OK)
2102 goto error_unset_dtr_r;
2103
2104 /* Optimize the read as much as we can, either way we read in a single pass */
2105 if ((start_byte) || (end_byte)) {
2106 /* The algorithm only copies 32 bit words, so the buffer
2107 * should be expanded to include the words at either end.
2108 * The first and last words will be read into a temp buffer
2109 * to avoid corruption
2110 */
2111 tmp_buff = malloc(total_u32 * 4);
2112 if (!tmp_buff)
2113 goto error_unset_dtr_r;
2114
2115 /* use the tmp buffer to read the entire data */
2116 u8buf_ptr = tmp_buff;
2117 } else
2118 /* address and read length are aligned so read directly into the passed buffer */
2119 u8buf_ptr = buffer;
2120
2121 /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
2122 * Abort flags are sticky, so can be read at end of transactions
2123 *
2124 * This data is read in aligned to 32 bit boundary.
2125 */
2126
2127 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
2128 * increments X0 by 4. */
2129 retval = mem_ap_read_buf_noincr(armv8->debug_ap, u8buf_ptr, 4, total_u32-1,
2130 armv8->debug_base + CPUV8_DBG_DTRTX);
2131 if (retval != ERROR_OK)
2132 goto error_unset_dtr_r;
2133
2134 /* Step 3.a - set DTR access mode back to Normal mode */
2135 dscr = (dscr & ~DSCR_MA);
2136 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2137 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2138 if (retval != ERROR_OK)
2139 goto error_free_buff_r;
2140
2141 /* Step 3.b - read DBGDTRTX for the final value */
2142 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2143 armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2144 memcpy(u8buf_ptr + (total_u32-1) * 4, &value, 4);
2145
2146 /* Check for sticky abort flags in the DSCR */
2147 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2148 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2149 if (retval != ERROR_OK)
2150 goto error_free_buff_r;
2151 if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
2152 /* Abort occurred - clear it and exit */
2153 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
2154 mem_ap_write_atomic_u32(armv8->debug_ap,
2155 armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
2156 goto error_free_buff_r;
2157 }
2158
2159 /* check if we need to copy aligned data by applying any shift necessary */
2160 if (tmp_buff) {
2161 memcpy(buffer, tmp_buff + start_byte, total_bytes);
2162 free(tmp_buff);
2163 }
2164
2165 /* Done */
2166 return ERROR_OK;
2167
2168 error_unset_dtr_r:
2169 /* Unset DTR mode */
2170 mem_ap_read_atomic_u32(armv8->debug_ap,
2171 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2172 dscr = (dscr & ~DSCR_MA);
2173 mem_ap_write_atomic_u32(armv8->debug_ap,
2174 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2175 error_free_buff_r:
2176 LOG_ERROR("error");
2177 free(tmp_buff);
2178 return ERROR_FAIL;
2179 }
2180
2181 static int aarch64_read_phys_memory(struct target *target,
2182 target_addr_t address, uint32_t size,
2183 uint32_t count, uint8_t *buffer)
2184 {
2185 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2186 LOG_DEBUG("Reading memory at real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32,
2187 address, size, count);
2188
2189 if (count && buffer) {
2190 /* read memory through APB-AP */
2191 retval = aarch64_mmu_modify(target, 0);
2192 if (retval != ERROR_OK)
2193 return retval;
2194 retval = aarch64_read_apb_ap_memory(target, address, size, count, buffer);
2195 }
2196 return retval;
2197 }
2198
2199 static int aarch64_read_memory(struct target *target, target_addr_t address,
2200 uint32_t size, uint32_t count, uint8_t *buffer)
2201 {
2202 int mmu_enabled = 0;
2203 int retval;
2204
2205 /* aarch64 handles unaligned memory access */
2206 LOG_DEBUG("Reading memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
2207 size, count);
2208
2209 /* determine if MMU was enabled on target stop */
2210 retval = aarch64_mmu(target, &mmu_enabled);
2211 if (retval != ERROR_OK)
2212 return retval;
2213
2214 if (mmu_enabled) {
2215 retval = aarch64_check_address(target, address);
2216 if (retval != ERROR_OK)
2217 return retval;
2218 /* enable MMU as we could have disabled it for phys access */
2219 retval = aarch64_mmu_modify(target, 1);
2220 if (retval != ERROR_OK)
2221 return retval;
2222 }
2223 return aarch64_read_apb_ap_memory(target, address, size, count, buffer);
2224 }
2225
2226 static int aarch64_write_phys_memory(struct target *target,
2227 target_addr_t address, uint32_t size,
2228 uint32_t count, const uint8_t *buffer)
2229 {
2230 int retval = ERROR_COMMAND_SYNTAX_ERROR;
2231
2232 LOG_DEBUG("Writing memory to real address 0x%" TARGET_PRIxADDR "; size %" PRId32 "; count %" PRId32, address,
2233 size, count);
2234
2235 if (count && buffer) {
2236 /* write memory through APB-AP */
2237 retval = aarch64_mmu_modify(target, 0);
2238 if (retval != ERROR_OK)
2239 return retval;
2240 return aarch64_write_apb_ap_memory(target, address, size, count, buffer);
2241 }
2242
2243 return retval;
2244 }
2245
2246 static int aarch64_write_memory(struct target *target, target_addr_t address,
2247 uint32_t size, uint32_t count, const uint8_t *buffer)
2248 {
2249 int mmu_enabled = 0;
2250 int retval;
2251
2252 /* aarch64 handles unaligned memory access */
2253 LOG_DEBUG("Writing memory at address 0x%" TARGET_PRIxADDR "; size %" PRId32
2254 "; count %" PRId32, address, size, count);
2255
2256 /* determine if MMU was enabled on target stop */
2257 retval = aarch64_mmu(target, &mmu_enabled);
2258 if (retval != ERROR_OK)
2259 return retval;
2260
2261 if (mmu_enabled) {
2262 retval = aarch64_check_address(target, address);
2263 if (retval != ERROR_OK)
2264 return retval;
2265 /* enable MMU as we could have disabled it for phys access */
2266 retval = aarch64_mmu_modify(target, 1);
2267 if (retval != ERROR_OK)
2268 return retval;
2269 }
2270 return aarch64_write_apb_ap_memory(target, address, size, count, buffer);
2271 }
2272
2273 static int aarch64_handle_target_request(void *priv)
2274 {
2275 struct target *target = priv;
2276 struct armv8_common *armv8 = target_to_armv8(target);
2277 int retval;
2278
2279 if (!target_was_examined(target))
2280 return ERROR_OK;
2281 if (!target->dbg_msg_enabled)
2282 return ERROR_OK;
2283
2284 if (target->state == TARGET_RUNNING) {
2285 uint32_t request;
2286 uint32_t dscr;
2287 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2288 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2289
2290 /* check if we have data */
2291 while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
2292 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2293 armv8->debug_base + CPUV8_DBG_DTRTX, &request);
2294 if (retval == ERROR_OK) {
2295 target_request(target, request);
2296 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2297 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2298 }
2299 }
2300 }
2301
2302 return ERROR_OK;
2303 }
2304
2305 static int aarch64_examine_first(struct target *target)
2306 {
2307 struct aarch64_common *aarch64 = target_to_aarch64(target);
2308 struct armv8_common *armv8 = &aarch64->armv8_common;
2309 struct adiv5_dap *swjdp = armv8->arm.dap;
2310 int i;
2311 int retval = ERROR_OK;
2312 uint64_t debug, ttypr;
2313 uint32_t cpuid;
2314 uint32_t tmp0, tmp1;
2315 debug = ttypr = cpuid = 0;
2316
2317 /* We do one extra read to ensure DAP is configured,
2318 * we call ahbap_debugport_init(swjdp) instead
2319 */
2320 retval = dap_dp_init(swjdp);
2321 if (retval != ERROR_OK)
2322 return retval;
2323
2324 /* Search for the APB-AB - it is needed for access to debug registers */
2325 retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap);
2326 if (retval != ERROR_OK) {
2327 LOG_ERROR("Could not find APB-AP for debug access");
2328 return retval;
2329 }
2330
2331 retval = mem_ap_init(armv8->debug_ap);
2332 if (retval != ERROR_OK) {
2333 LOG_ERROR("Could not initialize the APB-AP");
2334 return retval;
2335 }
2336
2337 armv8->debug_ap->memaccess_tck = 80;
2338
2339 if (!target->dbgbase_set) {
2340 uint32_t dbgbase;
2341 /* Get ROM Table base */
2342 uint32_t apid;
2343 int32_t coreidx = target->coreid;
2344 retval = dap_get_debugbase(armv8->debug_ap, &dbgbase, &apid);
2345 if (retval != ERROR_OK)
2346 return retval;
2347 /* Lookup 0x15 -- Processor DAP */
2348 retval = dap_lookup_cs_component(armv8->debug_ap, dbgbase, 0x15,
2349 &armv8->debug_base, &coreidx);
2350 if (retval != ERROR_OK)
2351 return retval;
2352 LOG_DEBUG("Detected core %" PRId32 " dbgbase: %08" PRIx32
2353 " apid: %08" PRIx32, coreidx, armv8->debug_base, apid);
2354 } else
2355 armv8->debug_base = target->dbgbase;
2356
2357 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2358 armv8->debug_base + CPUV8_DBG_LOCKACCESS, 0xC5ACCE55);
2359 if (retval != ERROR_OK) {
2360 LOG_DEBUG("LOCK debug access fail");
2361 return retval;
2362 }
2363
2364 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2365 armv8->debug_base + CPUV8_DBG_OSLAR, 0);
2366 if (retval != ERROR_OK) {
2367 LOG_DEBUG("Examine %s failed", "oslock");
2368 return retval;
2369 }
2370
2371 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2372 armv8->debug_base + CPUV8_DBG_MAINID0, &cpuid);
2373 if (retval != ERROR_OK) {
2374 LOG_DEBUG("Examine %s failed", "CPUID");
2375 return retval;
2376 }
2377
2378 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2379 armv8->debug_base + CPUV8_DBG_MEMFEATURE0, &tmp0);
2380 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
2381 armv8->debug_base + CPUV8_DBG_MEMFEATURE0 + 4, &tmp1);
2382 if (retval != ERROR_OK) {
2383 LOG_DEBUG("Examine %s failed", "Memory Model Type");
2384 return retval;
2385 }
2386 ttypr |= tmp1;
2387 ttypr = (ttypr << 32) | tmp0;
2388
2389 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2390 armv8->debug_base + CPUV8_DBG_DBGFEATURE0, &tmp0);
2391 retval += mem_ap_read_atomic_u32(armv8->debug_ap,
2392 armv8->debug_base + CPUV8_DBG_DBGFEATURE0 + 4, &tmp1);
2393 if (retval != ERROR_OK) {
2394 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2395 return retval;
2396 }
2397 debug |= tmp1;
2398 debug = (debug << 32) | tmp0;
2399
2400 LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
2401 LOG_DEBUG("ttypr = 0x%08" PRIx64, ttypr);
2402 LOG_DEBUG("debug = 0x%08" PRIx64, debug);
2403
2404 if (target->ctibase == 0) {
2405 /* assume a v8 rom table layout */
2406 armv8->cti_base = target->ctibase = armv8->debug_base + 0x10000;
2407 LOG_INFO("Target ctibase is not set, assuming 0x%0" PRIx32, target->ctibase);
2408 } else
2409 armv8->cti_base = target->ctibase;
2410
2411 armv8->arm.core_type = ARM_MODE_MON;
2412 retval = aarch64_dpm_setup(aarch64, debug);
2413 if (retval != ERROR_OK)
2414 return retval;
2415
2416 /* Setup Breakpoint Register Pairs */
2417 aarch64->brp_num = (uint32_t)((debug >> 12) & 0x0F) + 1;
2418 aarch64->brp_num_context = (uint32_t)((debug >> 28) & 0x0F) + 1;
2419 aarch64->brp_num_available = aarch64->brp_num;
2420 aarch64->brp_list = calloc(aarch64->brp_num, sizeof(struct aarch64_brp));
2421 for (i = 0; i < aarch64->brp_num; i++) {
2422 aarch64->brp_list[i].used = 0;
2423 if (i < (aarch64->brp_num-aarch64->brp_num_context))
2424 aarch64->brp_list[i].type = BRP_NORMAL;
2425 else
2426 aarch64->brp_list[i].type = BRP_CONTEXT;
2427 aarch64->brp_list[i].value = 0;
2428 aarch64->brp_list[i].control = 0;
2429 aarch64->brp_list[i].BRPn = i;
2430 }
2431
2432 LOG_DEBUG("Configured %i hw breakpoints", aarch64->brp_num);
2433
2434 target_set_examined(target);
2435 return ERROR_OK;
2436 }
2437
2438 static int aarch64_examine(struct target *target)
2439 {
2440 int retval = ERROR_OK;
2441
2442 /* don't re-probe hardware after each reset */
2443 if (!target_was_examined(target))
2444 retval = aarch64_examine_first(target);
2445
2446 /* Configure core debug access */
2447 if (retval == ERROR_OK)
2448 retval = aarch64_init_debug_access(target);
2449
2450 return retval;
2451 }
2452
2453 /*
2454 * Cortex-A8 target creation and initialization
2455 */
2456
2457 static int aarch64_init_target(struct command_context *cmd_ctx,
2458 struct target *target)
2459 {
2460 /* examine_first() does a bunch of this */
2461 return ERROR_OK;
2462 }
2463
2464 static int aarch64_init_arch_info(struct target *target,
2465 struct aarch64_common *aarch64, struct jtag_tap *tap)
2466 {
2467 struct armv8_common *armv8 = &aarch64->armv8_common;
2468 struct adiv5_dap *dap = armv8->arm.dap;
2469
2470 armv8->arm.dap = dap;
2471
2472 /* Setup struct aarch64_common */
2473 aarch64->common_magic = AARCH64_COMMON_MAGIC;
2474 /* tap has no dap initialized */
2475 if (!tap->dap) {
2476 tap->dap = dap_init();
2477
2478 /* Leave (only) generic DAP stuff for debugport_init() */
2479 tap->dap->tap = tap;
2480 }
2481
2482 armv8->arm.dap = tap->dap;
2483
2484 aarch64->fast_reg_read = 0;
2485
2486 /* register arch-specific functions */
2487 armv8->examine_debug_reason = NULL;
2488
2489 armv8->post_debug_entry = aarch64_post_debug_entry;
2490
2491 armv8->pre_restore_context = NULL;
2492
2493 armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
2494
2495 /* REVISIT v7a setup should be in a v7a-specific routine */
2496 armv8_init_arch_info(target, armv8);
2497 target_register_timer_callback(aarch64_handle_target_request, 1, 1, target);
2498
2499 return ERROR_OK;
2500 }
2501
2502 static int aarch64_target_create(struct target *target, Jim_Interp *interp)
2503 {
2504 struct aarch64_common *aarch64 = calloc(1, sizeof(struct aarch64_common));
2505
2506 return aarch64_init_arch_info(target, aarch64, target->tap);
2507 }
2508
2509 static int aarch64_mmu(struct target *target, int *enabled)
2510 {
2511 if (target->state != TARGET_HALTED) {
2512 LOG_ERROR("%s: target not halted", __func__);
2513 return ERROR_TARGET_INVALID;
2514 }
2515
2516 *enabled = target_to_aarch64(target)->armv8_common.armv8_mmu.mmu_enabled;
2517 return ERROR_OK;
2518 }
2519
2520 static int aarch64_virt2phys(struct target *target, target_addr_t virt,
2521 target_addr_t *phys)
2522 {
2523 return armv8_mmu_translate_va(target, virt, phys);
2524 }
2525
2526 COMMAND_HANDLER(aarch64_handle_cache_info_command)
2527 {
2528 struct target *target = get_current_target(CMD_CTX);
2529 struct armv8_common *armv8 = target_to_armv8(target);
2530
2531 return armv8_handle_cache_info_command(CMD_CTX,
2532 &armv8->armv8_mmu.armv8_cache);
2533 }
2534
2535
2536 COMMAND_HANDLER(aarch64_handle_dbginit_command)
2537 {
2538 struct target *target = get_current_target(CMD_CTX);
2539 if (!target_was_examined(target)) {
2540 LOG_ERROR("target not examined yet");
2541 return ERROR_FAIL;
2542 }
2543
2544 return aarch64_init_debug_access(target);
2545 }
2546 COMMAND_HANDLER(aarch64_handle_smp_off_command)
2547 {
2548 struct target *target = get_current_target(CMD_CTX);
2549 /* check target is an smp target */
2550 struct target_list *head;
2551 struct target *curr;
2552 head = target->head;
2553 target->smp = 0;
2554 if (head != (struct target_list *)NULL) {
2555 while (head != (struct target_list *)NULL) {
2556 curr = head->target;
2557 curr->smp = 0;
2558 head = head->next;
2559 }
2560 /* fixes the target display to the debugger */
2561 target->gdb_service->target = target;
2562 }
2563 return ERROR_OK;
2564 }
2565
2566 COMMAND_HANDLER(aarch64_handle_smp_on_command)
2567 {
2568 struct target *target = get_current_target(CMD_CTX);
2569 struct target_list *head;
2570 struct target *curr;
2571 head = target->head;
2572 if (head != (struct target_list *)NULL) {
2573 target->smp = 1;
2574 while (head != (struct target_list *)NULL) {
2575 curr = head->target;
2576 curr->smp = 1;
2577 head = head->next;
2578 }
2579 }
2580 return ERROR_OK;
2581 }
2582
2583 COMMAND_HANDLER(aarch64_handle_smp_gdb_command)
2584 {
2585 struct target *target = get_current_target(CMD_CTX);
2586 int retval = ERROR_OK;
2587 struct target_list *head;
2588 head = target->head;
2589 if (head != (struct target_list *)NULL) {
2590 if (CMD_ARGC == 1) {
2591 int coreid = 0;
2592 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], coreid);
2593 if (ERROR_OK != retval)
2594 return retval;
2595 target->gdb_service->core[1] = coreid;
2596
2597 }
2598 command_print(CMD_CTX, "gdb coreid %" PRId32 " -> %" PRId32, target->gdb_service->core[0]
2599 , target->gdb_service->core[1]);
2600 }
2601 return ERROR_OK;
2602 }
2603
2604 static const struct command_registration aarch64_exec_command_handlers[] = {
2605 {
2606 .name = "cache_info",
2607 .handler = aarch64_handle_cache_info_command,
2608 .mode = COMMAND_EXEC,
2609 .help = "display information about target caches",
2610 .usage = "",
2611 },
2612 {
2613 .name = "dbginit",
2614 .handler = aarch64_handle_dbginit_command,
2615 .mode = COMMAND_EXEC,
2616 .help = "Initialize core debug",
2617 .usage = "",
2618 },
2619 { .name = "smp_off",
2620 .handler = aarch64_handle_smp_off_command,
2621 .mode = COMMAND_EXEC,
2622 .help = "Stop smp handling",
2623 .usage = "",
2624 },
2625 {
2626 .name = "smp_on",
2627 .handler = aarch64_handle_smp_on_command,
2628 .mode = COMMAND_EXEC,
2629 .help = "Restart smp handling",
2630 .usage = "",
2631 },
2632 {
2633 .name = "smp_gdb",
2634 .handler = aarch64_handle_smp_gdb_command,
2635 .mode = COMMAND_EXEC,
2636 .help = "display/fix current core played to gdb",
2637 .usage = "",
2638 },
2639
2640
2641 COMMAND_REGISTRATION_DONE
2642 };
2643 static const struct command_registration aarch64_command_handlers[] = {
2644 {
2645 .chain = arm_command_handlers,
2646 },
2647 {
2648 .chain = armv8_command_handlers,
2649 },
2650 {
2651 .name = "cortex_a",
2652 .mode = COMMAND_ANY,
2653 .help = "Cortex-A command group",
2654 .usage = "",
2655 .chain = aarch64_exec_command_handlers,
2656 },
2657 COMMAND_REGISTRATION_DONE
2658 };
2659
2660 struct target_type aarch64_target = {
2661 .name = "aarch64",
2662
2663 .poll = aarch64_poll,
2664 .arch_state = armv8_arch_state,
2665
2666 .halt = aarch64_halt,
2667 .resume = aarch64_resume,
2668 .step = aarch64_step,
2669
2670 .assert_reset = aarch64_assert_reset,
2671 .deassert_reset = aarch64_deassert_reset,
2672
2673 /* REVISIT allow exporting VFP3 registers ... */
2674 .get_gdb_reg_list = armv8_get_gdb_reg_list,
2675
2676 .read_memory = aarch64_read_memory,
2677 .write_memory = aarch64_write_memory,
2678
2679 .checksum_memory = arm_checksum_memory,
2680 .blank_check_memory = arm_blank_check_memory,
2681
2682 .run_algorithm = armv4_5_run_algorithm,
2683
2684 .add_breakpoint = aarch64_add_breakpoint,
2685 .add_context_breakpoint = aarch64_add_context_breakpoint,
2686 .add_hybrid_breakpoint = aarch64_add_hybrid_breakpoint,
2687 .remove_breakpoint = aarch64_remove_breakpoint,
2688 .add_watchpoint = NULL,
2689 .remove_watchpoint = NULL,
2690
2691 .commands = aarch64_command_handlers,
2692 .target_create = aarch64_target_create,
2693 .init_target = aarch64_init_target,
2694 .examine = aarch64_examine,
2695
2696 .read_phys_memory = aarch64_read_phys_memory,
2697 .write_phys_memory = aarch64_write_phys_memory,
2698 .mmu = aarch64_mmu,
2699 .virt2phys = aarch64_virt2phys,
2700 };
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