?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
stlink: support srst reset
[openocd/cmsis-dap.git] / src / target / stm32_stlink.c
blobf9daa014a0de3851093b19b4dec497c2e839169a
1 /***************************************************************************
2 * Copyright (C) 2011 by Mathias Kuester *
3 * Mathias Kuester <kesmtp@freenet.de> *
4 * *
5 * Copyright (C) 2011 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include "jtag/jtag.h"
29 #include "jtag/stlink/stlink_transport.h"
30 #include "jtag/stlink/stlink_interface.h"
31 #include "jtag/stlink/stlink_layout.h"
32 #include "register.h"
33 #include "algorithm.h"
34 #include "target.h"
35 #include "breakpoints.h"
36 #include "target_type.h"
37 #include "armv7m.h"
38 #include "cortex_m.h"
39 #include "arm_semihosting.h"
40
41 #define ARMV7M_SCS_DCRSR 0xe000edf4
42 #define ARMV7M_SCS_DCRDR 0xe000edf8
43
44 static inline struct stlink_interface_s *target_to_stlink(struct target *target)
45 {
46 return target->tap->priv;
47 }
48
49 static int stm32_stlink_load_core_reg_u32(struct target *target,
50 enum armv7m_regtype type,
51 uint32_t num, uint32_t *value)
52 {
53 int retval;
54 struct stlink_interface_s *stlink_if = target_to_stlink(target);
55
56 LOG_DEBUG("%s", __func__);
57
58 /* NOTE: we "know" here that the register identifiers used
59 * in the v7m header match the Cortex-M3 Debug Core Register
60 * Selector values for R0..R15, xPSR, MSP, and PSP.
61 */
62 switch (num) {
63 case 0 ... 18:
64 /* read a normal core register */
65 retval = stlink_if->layout->api->read_reg(stlink_if->fd, num, value);
66
67 if (retval != ERROR_OK) {
68 LOG_ERROR("JTAG failure %i", retval);
69 return ERROR_JTAG_DEVICE_ERROR;
70 }
71 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
72 break;
73
74 case ARMV7M_FPSID:
75 case ARMV7M_FPEXC:
76 *value = 0;
77 break;
78
79 case ARMV7M_FPSCR:
80 /* Floating-point Status and Registers */
81 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, 33);
82 if (retval != ERROR_OK)
83 return retval;
84 retval = target_read_u32(target, ARMV7M_SCS_DCRDR, value);
85 if (retval != ERROR_OK)
86 return retval;
87 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
88 break;
89
90 case ARMV7M_S0 ... ARMV7M_S31:
91 /* Floating-point Status and Registers */
92 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, num-ARMV7M_S0+64);
93 if (retval != ERROR_OK)
94 return retval;
95 retval = target_read_u32(target, ARMV7M_SCS_DCRDR, value);
96 if (retval != ERROR_OK)
97 return retval;
98 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
99 break;
100
101 case ARMV7M_D0 ... ARMV7M_D15:
102 value = 0;
103 break;
104
105 case ARMV7M_PRIMASK:
106 case ARMV7M_BASEPRI:
107 case ARMV7M_FAULTMASK:
108 case ARMV7M_CONTROL:
109 /* Cortex-M3 packages these four registers as bitfields
110 * in one Debug Core register. So say r0 and r2 docs;
111 * it was removed from r1 docs, but still works.
112 */
113 retval = stlink_if->layout->api->read_reg(stlink_if->fd, 20, value);
114
115 switch (num) {
116 case ARMV7M_PRIMASK:
117 *value = buf_get_u32((uint8_t *) value, 0, 1);
118 break;
119
120 case ARMV7M_BASEPRI:
121 *value = buf_get_u32((uint8_t *) value, 8, 8);
122 break;
123
124 case ARMV7M_FAULTMASK:
125 *value = buf_get_u32((uint8_t *) value, 16, 1);
126 break;
127
128 case ARMV7M_CONTROL:
129 *value = buf_get_u32((uint8_t *) value, 24, 2);
130 break;
131 }
132
133 LOG_DEBUG("load from special reg %i value 0x%" PRIx32 "",
134 (int)num, *value);
135 break;
136
137 default:
138 return ERROR_COMMAND_SYNTAX_ERROR;
139 }
140
141 return ERROR_OK;
142 }
143
144 static int stm32_stlink_store_core_reg_u32(struct target *target,
145 enum armv7m_regtype type,
146 uint32_t num, uint32_t value)
147 {
148 int retval;
149 uint32_t reg;
150 struct armv7m_common *armv7m = target_to_armv7m(target);
151 struct stlink_interface_s *stlink_if = target_to_stlink(target);
152
153 LOG_DEBUG("%s", __func__);
154
155 #ifdef ARMV7_GDB_HACKS
156 /* If the LR register is being modified, make sure it will put us
157 * in "thumb" mode, or an INVSTATE exception will occur. This is a
158 * hack to deal with the fact that gdb will sometimes "forge"
159 * return addresses, and doesn't set the LSB correctly (i.e., when
160 * printing expressions containing function calls, it sets LR = 0.)
161 * Valid exception return codes have bit 0 set too.
162 */
163 if (num == ARMV7M_R14)
164 value |= 0x01;
165 #endif
166
167 /* NOTE: we "know" here that the register identifiers used
168 * in the v7m header match the Cortex-M3 Debug Core Register
169 * Selector values for R0..R15, xPSR, MSP, and PSP.
170 */
171 switch (num) {
172 case 0 ... 18:
173 retval = stlink_if->layout->api->write_reg(stlink_if->fd, num, value);
174
175 if (retval != ERROR_OK) {
176 struct reg *r;
177
178 LOG_ERROR("JTAG failure");
179 r = armv7m->core_cache->reg_list + num;
180 r->dirty = r->valid;
181 return ERROR_JTAG_DEVICE_ERROR;
182 }
183 LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value);
184 break;
185
186 case ARMV7M_FPSID:
187 case ARMV7M_FPEXC:
188 break;
189
190 case ARMV7M_FPSCR:
191 /* Floating-point Status and Registers */
192 retval = target_write_u32(target, ARMV7M_SCS_DCRDR, value);
193 if (retval != ERROR_OK)
194 return retval;
195 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, 33 | (1<<16));
196 if (retval != ERROR_OK)
197 return retval;
198 LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value);
199 break;
200
201 case ARMV7M_S0 ... ARMV7M_S31:
202 /* Floating-point Status and Registers */
203 retval = target_write_u32(target, ARMV7M_SCS_DCRDR, value);
204 if (retval != ERROR_OK)
205 return retval;
206 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, (num-ARMV7M_S0+64) | (1<<16));
207 if (retval != ERROR_OK)
208 return retval;
209 LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value);
210 break;
211
212 case ARMV7M_D0 ... ARMV7M_D15:
213 break;
214
215 case ARMV7M_PRIMASK:
216 case ARMV7M_BASEPRI:
217 case ARMV7M_FAULTMASK:
218 case ARMV7M_CONTROL:
219 /* Cortex-M3 packages these four registers as bitfields
220 * in one Debug Core register. So say r0 and r2 docs;
221 * it was removed from r1 docs, but still works.
222 */
223
224 stlink_if->layout->api->read_reg(stlink_if->fd, 20, &reg);
225
226 switch (num) {
227 case ARMV7M_PRIMASK:
228 buf_set_u32((uint8_t *) &reg, 0, 1, value);
229 break;
230
231 case ARMV7M_BASEPRI:
232 buf_set_u32((uint8_t *) &reg, 8, 8, value);
233 break;
234
235 case ARMV7M_FAULTMASK:
236 buf_set_u32((uint8_t *) &reg, 16, 1, value);
237 break;
238
239 case ARMV7M_CONTROL:
240 buf_set_u32((uint8_t *) &reg, 24, 2, value);
241 break;
242 }
243
244 stlink_if->layout->api->write_reg(stlink_if->fd, 20, reg);
245
246 LOG_DEBUG("write special reg %i value 0x%" PRIx32 " ", (int)num, value);
247 break;
248
249 default:
250 return ERROR_COMMAND_SYNTAX_ERROR;
251 }
252
253 return ERROR_OK;
254 }
255
256 static int stm32_stlink_examine_debug_reason(struct target *target)
257 {
258 if ((target->debug_reason != DBG_REASON_DBGRQ)
259 && (target->debug_reason != DBG_REASON_SINGLESTEP)) {
260 target->debug_reason = DBG_REASON_BREAKPOINT;
261 }
262
263 return ERROR_OK;
264 }
265
266 static int stm32_stlink_init_arch_info(struct target *target,
267 struct cortex_m3_common *cortex_m3,
268 struct jtag_tap *tap)
269 {
270 struct armv7m_common *armv7m;
271
272 LOG_DEBUG("%s", __func__);
273
274 armv7m = &cortex_m3->armv7m;
275 armv7m_init_arch_info(target, armv7m);
276
277 armv7m->load_core_reg_u32 = stm32_stlink_load_core_reg_u32;
278 armv7m->store_core_reg_u32 = stm32_stlink_store_core_reg_u32;
279
280 armv7m->examine_debug_reason = stm32_stlink_examine_debug_reason;
281
282 return ERROR_OK;
283 }
284
285 static int stm32_stlink_init_target(struct command_context *cmd_ctx,
286 struct target *target)
287 {
288 LOG_DEBUG("%s", __func__);
289
290 armv7m_build_reg_cache(target);
291
292 return ERROR_OK;
293 }
294
295 static int stm32_stlink_target_create(struct target *target,
296 Jim_Interp *interp)
297 {
298 LOG_DEBUG("%s", __func__);
299
300 struct cortex_m3_common *cortex_m3 = calloc(1, sizeof(struct cortex_m3_common));
301
302 if (!cortex_m3)
303 return ERROR_COMMAND_SYNTAX_ERROR;
304
305 stm32_stlink_init_arch_info(target, cortex_m3, target->tap);
306
307 return ERROR_OK;
308 }
309
310 static int stm32_stlink_load_context(struct target *target)
311 {
312 struct armv7m_common *armv7m = target_to_armv7m(target);
313 int num_regs = armv7m->core_cache->num_regs;
314
315 for (int i = 0; i < num_regs; i++) {
316 if (!armv7m->core_cache->reg_list[i].valid)
317 armv7m->read_core_reg(target, i);
318 }
319
320 return ERROR_OK;
321 }
322
323 static int stlink_debug_entry(struct target *target)
324 {
325 struct armv7m_common *armv7m = target_to_armv7m(target);
326 struct arm *arm = &armv7m->arm;
327 struct reg *r;
328 uint32_t xPSR;
329 int retval;
330
331 retval = armv7m->examine_debug_reason(target);
332 if (retval != ERROR_OK)
333 return retval;
334
335 stm32_stlink_load_context(target);
336
337 r = armv7m->core_cache->reg_list + ARMV7M_xPSR;
338 xPSR = buf_get_u32(r->value, 0, 32);
339
340 /* Are we in an exception handler */
341 if (xPSR & 0x1FF) {
342 armv7m->core_mode = ARMV7M_MODE_HANDLER;
343 armv7m->exception_number = (xPSR & 0x1FF);
344
345 arm->core_mode = ARM_MODE_HANDLER;
346 arm->map = armv7m_msp_reg_map;
347 } else {
348 unsigned control = buf_get_u32(armv7m->core_cache
349 ->reg_list[ARMV7M_CONTROL].value, 0, 2);
350
351 /* is this thread privileged? */
352 armv7m->core_mode = control & 1;
353 arm->core_mode = armv7m->core_mode
354 ? ARM_MODE_USER_THREAD
355 : ARM_MODE_THREAD;
356
357 /* which stack is it using? */
358 if (control & 2)
359 arm->map = armv7m_psp_reg_map;
360 else
361 arm->map = armv7m_msp_reg_map;
362
363 armv7m->exception_number = 0;
364 }
365
366 LOG_DEBUG("entered debug state in core mode: %s at PC 0x%08" PRIx32 ", target->state: %s",
367 armv7m_mode_strings[armv7m->core_mode],
368 *(uint32_t *)(arm->pc->value),
369 target_state_name(target));
370
371 return retval;
372 }
373
374 static int stm32_stlink_poll(struct target *target)
375 {
376 enum target_state state;
377 struct stlink_interface_s *stlink_if = target_to_stlink(target);
378 struct armv7m_common *armv7m = target_to_armv7m(target);
379
380 state = stlink_if->layout->api->state(stlink_if->fd);
381
382 if (state == TARGET_UNKNOWN) {
383 LOG_ERROR("jtag status contains invalid mode value - communication failure");
384 return ERROR_TARGET_FAILURE;
385 }
386
387 if (target->state == state)
388 return ERROR_OK;
389
390 if (state == TARGET_HALTED) {
391 target->state = state;
392
393 int retval = stlink_debug_entry(target);
394 if (retval != ERROR_OK)
395 return retval;
396
397 if (arm_semihosting(target, &retval) != 0)
398 return retval;
399
400 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
401 LOG_DEBUG("halted: PC: 0x%08x", buf_get_u32(armv7m->arm.pc->value, 0, 32));
402 }
403
404 return ERROR_OK;
405 }
406
407 static int stm32_stlink_assert_reset(struct target *target)
408 {
409 int res;
410 struct stlink_interface_s *stlink_if = target_to_stlink(target);
411 struct armv7m_common *armv7m = target_to_armv7m(target);
412 bool use_srst_fallback = true;
413
414 LOG_DEBUG("%s", __func__);
415
416 enum reset_types jtag_reset_config = jtag_get_reset_config();
417
418 stlink_if->layout->api->write_debug_reg(stlink_if->fd, DCB_DHCSR, DBGKEY|C_DEBUGEN);
419 stlink_if->layout->api->write_debug_reg(stlink_if->fd, DCB_DEMCR, VC_CORERESET);
420
421 if (jtag_reset_config & RESET_HAS_SRST) {
422 jtag_add_reset(0, 1);
423 res = stlink_if->layout->api->assert_srst(stlink_if->fd, 0);
424 if (res == ERROR_COMMAND_NOTFOUND)
425 LOG_ERROR("Hardware srst not supported, falling back to software reset");
426 else if (res == ERROR_OK) {
427 /* hardware srst supported */
428 use_srst_fallback = false;
429 }
430 }
431
432 if (use_srst_fallback) {
433 /* stlink v1 api does support hardware srst, so we use a software reset fallback */
434 stlink_if->layout->api->write_debug_reg(stlink_if->fd, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
435 }
436
437 res = stlink_if->layout->api->reset(stlink_if->fd);
438
439 if (res != ERROR_OK)
440 return res;
441
442 /* registers are now invalid */
443 register_cache_invalidate(armv7m->core_cache);
444
445 if (target->reset_halt) {
446 target->state = TARGET_RESET;
447 target->debug_reason = DBG_REASON_DBGRQ;
448 } else {
449 target->state = TARGET_HALTED;
450 }
451
452 return ERROR_OK;
453 }
454
455 static int stm32_stlink_deassert_reset(struct target *target)
456 {
457 int res;
458 struct stlink_interface_s *stlink_if = target_to_stlink(target);
459
460 enum reset_types jtag_reset_config = jtag_get_reset_config();
461
462 LOG_DEBUG("%s", __func__);
463
464 if (jtag_reset_config & RESET_HAS_SRST)
465 stlink_if->layout->api->assert_srst(stlink_if->fd, 1);
466
467 /* virtual deassert reset, we need it for the internal
468 * jtag state machine
469 */
470 jtag_add_reset(0, 0);
471
472 if (!target->reset_halt) {
473 res = target_resume(target, 1, 0, 0, 0);
474
475 if (res != ERROR_OK)
476 return res;
477 }
478
479 return ERROR_OK;
480 }
481
482 static int stm32_stlink_soft_reset_halt(struct target *target)
483 {
484 LOG_DEBUG("%s", __func__);
485 return ERROR_OK;
486 }
487
488 static int stm32_stlink_halt(struct target *target)
489 {
490 int res;
491 struct stlink_interface_s *stlink_if = target_to_stlink(target);
492
493 LOG_DEBUG("%s", __func__);
494
495 if (target->state == TARGET_HALTED) {
496 LOG_DEBUG("target was already halted");
497 return ERROR_OK;
498 }
499
500 if (target->state == TARGET_UNKNOWN)
501 LOG_WARNING("target was in unknown state when halt was requested");
502
503 res = stlink_if->layout->api->halt(stlink_if->fd);
504
505 if (res != ERROR_OK)
506 return res;
507
508 target->debug_reason = DBG_REASON_DBGRQ;
509
510 return ERROR_OK;
511 }
512
513 static int stm32_stlink_resume(struct target *target, int current,
514 uint32_t address, int handle_breakpoints,
515 int debug_execution)
516 {
517 int res;
518 struct stlink_interface_s *stlink_if = target_to_stlink(target);
519 struct armv7m_common *armv7m = target_to_armv7m(target);
520 uint32_t resume_pc;
521 struct breakpoint *breakpoint = NULL;
522 struct reg *pc;
523
524 LOG_DEBUG("%s %d 0x%08x %d %d", __func__, current, address,
525 handle_breakpoints, debug_execution);
526
527 if (target->state != TARGET_HALTED) {
528 LOG_WARNING("target not halted");
529 return ERROR_TARGET_NOT_HALTED;
530 }
531
532 pc = armv7m->arm.pc;
533 if (!current) {
534 buf_set_u32(pc->value, 0, 32, address);
535 pc->dirty = true;
536 pc->valid = true;
537 }
538
539 if (!breakpoint_find(target, buf_get_u32(pc->value, 0, 32))
540 && !debug_execution) {
541 armv7m_maybe_skip_bkpt_inst(target, NULL);
542 }
543
544 resume_pc = buf_get_u32(pc->value, 0, 32);
545
546 armv7m_restore_context(target);
547
548 /* registers are now invalid */
549 register_cache_invalidate(armv7m->core_cache);
550
551 /* the front-end may request us not to handle breakpoints */
552 if (handle_breakpoints) {
553 /* Single step past breakpoint at current address */
554 breakpoint = breakpoint_find(target, resume_pc);
555 if (breakpoint) {
556 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (ID: %d)",
557 breakpoint->address,
558 breakpoint->unique_id);
559 cortex_m3_unset_breakpoint(target, breakpoint);
560
561 res = stlink_if->layout->api->step(stlink_if->fd);
562
563 if (res != ERROR_OK)
564 return res;
565
566 cortex_m3_set_breakpoint(target, breakpoint);
567 }
568 }
569
570 res = stlink_if->layout->api->run(stlink_if->fd);
571
572 if (res != ERROR_OK)
573 return res;
574
575 target->state = TARGET_RUNNING;
576
577 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
578
579 return ERROR_OK;
580 }
581
582 static int stm32_stlink_step(struct target *target, int current,
583 uint32_t address, int handle_breakpoints)
584 {
585 int res;
586 struct stlink_interface_s *stlink_if = target_to_stlink(target);
587 struct armv7m_common *armv7m = target_to_armv7m(target);
588 struct breakpoint *breakpoint = NULL;
589 struct reg *pc = armv7m->arm.pc;
590 bool bkpt_inst_found = false;
591
592 LOG_DEBUG("%s", __func__);
593
594 if (target->state != TARGET_HALTED) {
595 LOG_WARNING("target not halted");
596 return ERROR_TARGET_NOT_HALTED;
597 }
598
599 if (!current) {
600 buf_set_u32(pc->value, 0, 32, address);
601 pc->dirty = true;
602 pc->valid = true;
603 }
604
605 uint32_t pc_value = buf_get_u32(pc->value, 0, 32);
606
607 /* the front-end may request us not to handle breakpoints */
608 if (handle_breakpoints) {
609 breakpoint = breakpoint_find(target, pc_value);
610 if (breakpoint)
611 cortex_m3_unset_breakpoint(target, breakpoint);
612 }
613
614 armv7m_maybe_skip_bkpt_inst(target, &bkpt_inst_found);
615
616 target->debug_reason = DBG_REASON_SINGLESTEP;
617
618 armv7m_restore_context(target);
619
620 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
621
622 res = stlink_if->layout->api->step(stlink_if->fd);
623
624 if (res != ERROR_OK)
625 return res;
626
627 /* registers are now invalid */
628 register_cache_invalidate(armv7m->core_cache);
629
630 if (breakpoint)
631 cortex_m3_set_breakpoint(target, breakpoint);
632
633 stlink_debug_entry(target);
634 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
635
636 LOG_INFO("halted: PC: 0x%08x", buf_get_u32(armv7m->arm.pc->value, 0, 32));
637
638 return ERROR_OK;
639 }
640
641 static int stm32_stlink_read_memory(struct target *target, uint32_t address,
642 uint32_t size, uint32_t count,
643 uint8_t *buffer)
644 {
645 int res;
646 uint32_t buffer_threshold = 128;
647 uint32_t addr_increment = 4;
648 uint32_t c;
649 struct stlink_interface_s *stlink_if = target_to_stlink(target);
650
651 if (!count || !buffer)
652 return ERROR_COMMAND_SYNTAX_ERROR;
653
654 LOG_DEBUG("%s 0x%08x %d %d", __func__, address, size, count);
655
656 /* prepare byte count, buffer threshold
657 * and address increment for none 32bit access
658 */
659 if (size != 4) {
660 count *= size;
661 buffer_threshold = 64;
662 addr_increment = 1;
663 }
664
665 while (count) {
666 if (count > buffer_threshold)
667 c = buffer_threshold;
668 else
669 c = count;
670
671 if (size != 4)
672 res = stlink_if->layout->api->read_mem8(stlink_if->fd,
673 address, c, buffer);
674 else
675 res = stlink_if->layout->api->read_mem32(stlink_if->fd,
676 address, c, buffer);
677
678 if (res != ERROR_OK)
679 return res;
680
681 address += (c * addr_increment);
682 buffer += (c * addr_increment);
683 count -= c;
684 }
685
686 return ERROR_OK;
687 }
688
689 static int stm32_stlink_write_memory(struct target *target, uint32_t address,
690 uint32_t size, uint32_t count,
691 const uint8_t *buffer)
692 {
693 int res;
694 uint32_t buffer_threshold = 128;
695 uint32_t addr_increment = 4;
696 uint32_t c;
697 struct stlink_interface_s *stlink_if = target_to_stlink(target);
698
699 if (!count || !buffer)
700 return ERROR_COMMAND_SYNTAX_ERROR;
701
702 LOG_DEBUG("%s 0x%08x %d %d", __func__, address, size, count);
703
704 /* prepare byte count, buffer threshold
705 * and address increment for none 32bit access
706 */
707 if (size != 4) {
708 count *= size;
709 buffer_threshold = 64;
710 addr_increment = 1;
711 }
712
713 while (count) {
714 if (count > buffer_threshold)
715 c = buffer_threshold;
716 else
717 c = count;
718
719 if (size != 4)
720 res = stlink_if->layout->api->write_mem8(stlink_if->fd,
721 address, c, buffer);
722 else
723 res = stlink_if->layout->api->write_mem32(stlink_if->fd,
724 address, c, buffer);
725
726 if (res != ERROR_OK)
727 return res;
728
729 address += (c * addr_increment);
730 buffer += (c * addr_increment);
731 count -= c;
732 }
733
734 return ERROR_OK;
735 }
736
737 static int stm32_stlink_bulk_write_memory(struct target *target,
738 uint32_t address, uint32_t count,
739 const uint8_t *buffer)
740 {
741 return stm32_stlink_write_memory(target, address, 4, count, buffer);
742 }
743
744 struct target_type stm32_stlink_target = {
745 .name = "stm32_stlink",
746
747 .init_target = stm32_stlink_init_target,
748 .target_create = stm32_stlink_target_create,
749 .examine = cortex_m3_examine,
750
751 .poll = stm32_stlink_poll,
752 .arch_state = armv7m_arch_state,
753
754 .assert_reset = stm32_stlink_assert_reset,
755 .deassert_reset = stm32_stlink_deassert_reset,
756 .soft_reset_halt = stm32_stlink_soft_reset_halt,
757
758 .halt = stm32_stlink_halt,
759 .resume = stm32_stlink_resume,
760 .step = stm32_stlink_step,
761
762 .get_gdb_reg_list = armv7m_get_gdb_reg_list,
763
764 .read_memory = stm32_stlink_read_memory,
765 .write_memory = stm32_stlink_write_memory,
766 .bulk_write_memory = stm32_stlink_bulk_write_memory,
767 .checksum_memory = armv7m_checksum_memory,
768 .blank_check_memory = armv7m_blank_check_memory,
769
770 .run_algorithm = armv7m_run_algorithm,
771 .start_algorithm = armv7m_start_algorithm,
772 .wait_algorithm = armv7m_wait_algorithm,
773
774 .add_breakpoint = cortex_m3_add_breakpoint,
775 .remove_breakpoint = cortex_m3_remove_breakpoint,
776 .add_watchpoint = cortex_m3_add_watchpoint,
777 .remove_watchpoint = cortex_m3_remove_watchpoint,
778 };
Add cmsis-dap support