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armv7m: use generic register core_cache
[openocd.git] / src / target / hla_target.c
blob3721a94ff12a922fd1528f29c349c1f7028b749d
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/hla/hla_transport.h"
30 #include "jtag/hla/hla_interface.h"
31 #include "jtag/hla/hla_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 hl_interface_s *target_to_adapter(struct target *target)
45 {
46 return target->tap->priv;
47 }
48
49 static int adapter_load_core_reg_u32(struct target *target,
50 uint32_t num, uint32_t *value)
51 {
52 int retval;
53 struct hl_interface_s *adapter = target_to_adapter(target);
54
55 LOG_DEBUG("%s", __func__);
56
57 /* NOTE: we "know" here that the register identifiers used
58 * in the v7m header match the Cortex-M3 Debug Core Register
59 * Selector values for R0..R15, xPSR, MSP, and PSP.
60 */
61 switch (num) {
62 case 0 ... 18:
63 /* read a normal core register */
64 retval = adapter->layout->api->read_reg(adapter->fd, num, value);
65
66 if (retval != ERROR_OK) {
67 LOG_ERROR("JTAG failure %i", retval);
68 return ERROR_JTAG_DEVICE_ERROR;
69 }
70 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
71 break;
72
73 case ARMV7M_FPSID:
74 case ARMV7M_FPEXC:
75 *value = 0;
76 break;
77
78 case ARMV7M_FPSCR:
79 /* Floating-point Status and Registers */
80 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, 33);
81 if (retval != ERROR_OK)
82 return retval;
83 retval = target_read_u32(target, ARMV7M_SCS_DCRDR, value);
84 if (retval != ERROR_OK)
85 return retval;
86 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
87 break;
88
89 case ARMV7M_S0 ... ARMV7M_S31:
90 /* Floating-point Status and Registers */
91 retval = target_write_u32(target, ARMV7M_SCS_DCRSR, num-ARMV7M_S0+64);
92 if (retval != ERROR_OK)
93 return retval;
94 retval = target_read_u32(target, ARMV7M_SCS_DCRDR, value);
95 if (retval != ERROR_OK)
96 return retval;
97 LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
98 break;
99
100 case ARMV7M_D0 ... ARMV7M_D15:
101 value = 0;
102 break;
103
104 case ARMV7M_PRIMASK:
105 case ARMV7M_BASEPRI:
106 case ARMV7M_FAULTMASK:
107 case ARMV7M_CONTROL:
108 /* Cortex-M3 packages these four registers as bitfields
109 * in one Debug Core register. So say r0 and r2 docs;
110 * it was removed from r1 docs, but still works.
111 */
112 retval = adapter->layout->api->read_reg(adapter->fd, 20, value);
113 if (retval != ERROR_OK)
114 return retval;
115
116 switch (num) {
117 case ARMV7M_PRIMASK:
118 *value = buf_get_u32((uint8_t *) value, 0, 1);
119 break;
120
121 case ARMV7M_BASEPRI:
122 *value = buf_get_u32((uint8_t *) value, 8, 8);
123 break;
124
125 case ARMV7M_FAULTMASK:
126 *value = buf_get_u32((uint8_t *) value, 16, 1);
127 break;
128
129 case ARMV7M_CONTROL:
130 *value = buf_get_u32((uint8_t *) value, 24, 2);
131 break;
132 }
133
134 LOG_DEBUG("load from special reg %i value 0x%" PRIx32 "",
135 (int)num, *value);
136 break;
137
138 default:
139 return ERROR_COMMAND_SYNTAX_ERROR;
140 }
141
142 return ERROR_OK;
143 }
144
145 static int adapter_store_core_reg_u32(struct target *target,
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 hl_interface_s *adapter = target_to_adapter(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 = adapter->layout->api->write_reg(adapter->fd, num, value);
174
175 if (retval != ERROR_OK) {
176 struct reg *r;
177
178 LOG_ERROR("JTAG failure");
179 r = armv7m->arm.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 adapter->layout->api->read_reg(adapter->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 adapter->layout->api->write_reg(adapter->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 adapter_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 adapter_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 = adapter_load_core_reg_u32;
278 armv7m->store_core_reg_u32 = adapter_store_core_reg_u32;
279
280 armv7m->examine_debug_reason = adapter_examine_debug_reason;
281 armv7m->stlink = true;
282
283 return ERROR_OK;
284 }
285
286 static int adapter_init_target(struct command_context *cmd_ctx,
287 struct target *target)
288 {
289 LOG_DEBUG("%s", __func__);
290
291 armv7m_build_reg_cache(target);
292
293 return ERROR_OK;
294 }
295
296 static int adapter_target_create(struct target *target,
297 Jim_Interp *interp)
298 {
299 LOG_DEBUG("%s", __func__);
300
301 struct cortex_m3_common *cortex_m3 = calloc(1, sizeof(struct cortex_m3_common));
302
303 if (!cortex_m3)
304 return ERROR_COMMAND_SYNTAX_ERROR;
305
306 adapter_init_arch_info(target, cortex_m3, target->tap);
307
308 return ERROR_OK;
309 }
310
311 static int adapter_load_context(struct target *target)
312 {
313 struct armv7m_common *armv7m = target_to_armv7m(target);
314 int num_regs = armv7m->arm.core_cache->num_regs;
315
316 for (int i = 0; i < num_regs; i++) {
317 if (!armv7m->arm.core_cache->reg_list[i].valid)
318 armv7m->read_core_reg(target, i);
319 }
320
321 return ERROR_OK;
322 }
323
324 static int adapter_debug_entry(struct target *target)
325 {
326 struct hl_interface_s *adapter = target_to_adapter(target);
327 struct armv7m_common *armv7m = target_to_armv7m(target);
328 struct arm *arm = &armv7m->arm;
329 struct reg *r;
330 uint32_t xPSR;
331 int retval;
332
333 retval = armv7m->examine_debug_reason(target);
334 if (retval != ERROR_OK)
335 return retval;
336
337 adapter_load_context(target);
338
339 /* make sure we clear the vector catch bit */
340 adapter->layout->api->write_debug_reg(adapter->fd, DCB_DEMCR, TRCENA);
341
342 r = arm->core_cache->reg_list + ARMV7M_xPSR;
343 xPSR = buf_get_u32(r->value, 0, 32);
344
345 /* Are we in an exception handler */
346 if (xPSR & 0x1FF) {
347 armv7m->exception_number = (xPSR & 0x1FF);
348
349 arm->core_mode = ARM_MODE_HANDLER;
350 arm->map = armv7m_msp_reg_map;
351 } else {
352 unsigned control = buf_get_u32(arm->core_cache
353 ->reg_list[ARMV7M_CONTROL].value, 0, 2);
354
355 /* is this thread privileged? */
356 arm->core_mode = control & 1
357 ? ARM_MODE_USER_THREAD
358 : ARM_MODE_THREAD;
359
360 /* which stack is it using? */
361 if (control & 2)
362 arm->map = armv7m_psp_reg_map;
363 else
364 arm->map = armv7m_msp_reg_map;
365
366 armv7m->exception_number = 0;
367 }
368
369 LOG_DEBUG("entered debug state in core mode: %s at PC 0x%08" PRIx32 ", target->state: %s",
370 arm_mode_name(arm->core_mode),
371 *(uint32_t *)(arm->pc->value),
372 target_state_name(target));
373
374 return retval;
375 }
376
377 static int adapter_poll(struct target *target)
378 {
379 enum target_state state;
380 struct hl_interface_s *adapter = target_to_adapter(target);
381 struct armv7m_common *armv7m = target_to_armv7m(target);
382
383 state = adapter->layout->api->state(adapter->fd);
384
385 if (state == TARGET_UNKNOWN) {
386 LOG_ERROR("jtag status contains invalid mode value - communication failure");
387 return ERROR_TARGET_FAILURE;
388 }
389
390 if (target->state == state)
391 return ERROR_OK;
392
393 if (state == TARGET_HALTED) {
394 target->state = state;
395
396 int retval = adapter_debug_entry(target);
397 if (retval != ERROR_OK)
398 return retval;
399
400 if (arm_semihosting(target, &retval) != 0)
401 return retval;
402
403 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
404 LOG_DEBUG("halted: PC: 0x%08x", buf_get_u32(armv7m->arm.pc->value, 0, 32));
405 }
406
407 return ERROR_OK;
408 }
409
410 static int adapter_assert_reset(struct target *target)
411 {
412 int res = ERROR_OK;
413 struct hl_interface_s *adapter = target_to_adapter(target);
414 struct armv7m_common *armv7m = target_to_armv7m(target);
415 bool use_srst_fallback = true;
416
417 LOG_DEBUG("%s", __func__);
418
419 enum reset_types jtag_reset_config = jtag_get_reset_config();
420
421 bool srst_asserted = false;
422
423 if (jtag_reset_config & RESET_SRST_NO_GATING) {
424 jtag_add_reset(0, 1);
425 res = adapter->layout->api->assert_srst(adapter->fd, 0);
426 srst_asserted = true;
427 }
428
429 adapter->layout->api->write_debug_reg(adapter->fd, DCB_DHCSR, DBGKEY|C_DEBUGEN);
430
431 /* only set vector catch if halt is requested */
432 if (target->reset_halt)
433 adapter->layout->api->write_debug_reg(adapter->fd, DCB_DEMCR, TRCENA|VC_CORERESET);
434 else
435 adapter->layout->api->write_debug_reg(adapter->fd, DCB_DEMCR, TRCENA);
436
437 if (jtag_reset_config & RESET_HAS_SRST) {
438 if (!srst_asserted) {
439 jtag_add_reset(0, 1);
440 res = adapter->layout->api->assert_srst(adapter->fd, 0);
441 }
442 if (res == ERROR_COMMAND_NOTFOUND)
443 LOG_ERROR("Hardware srst not supported, falling back to software reset");
444 else if (res == ERROR_OK) {
445 /* hardware srst supported */
446 use_srst_fallback = false;
447 }
448 }
449
450 if (use_srst_fallback) {
451 /* stlink v1 api does not support hardware srst, so we use a software reset fallback */
452 adapter->layout->api->write_debug_reg(adapter->fd, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
453 }
454
455 res = adapter->layout->api->reset(adapter->fd);
456
457 if (res != ERROR_OK)
458 return res;
459
460 /* registers are now invalid */
461 register_cache_invalidate(armv7m->arm.core_cache);
462
463 if (target->reset_halt) {
464 target->state = TARGET_RESET;
465 target->debug_reason = DBG_REASON_DBGRQ;
466 } else {
467 target->state = TARGET_HALTED;
468 }
469
470 return ERROR_OK;
471 }
472
473 static int adapter_deassert_reset(struct target *target)
474 {
475 int res;
476 struct hl_interface_s *adapter = target_to_adapter(target);
477
478 enum reset_types jtag_reset_config = jtag_get_reset_config();
479
480 LOG_DEBUG("%s", __func__);
481
482 if (jtag_reset_config & RESET_HAS_SRST)
483 adapter->layout->api->assert_srst(adapter->fd, 1);
484
485 /* virtual deassert reset, we need it for the internal
486 * jtag state machine
487 */
488 jtag_add_reset(0, 0);
489
490 if (!target->reset_halt) {
491 res = target_resume(target, 1, 0, 0, 0);
492
493 if (res != ERROR_OK)
494 return res;
495 }
496
497 return ERROR_OK;
498 }
499
500 static int adapter_soft_reset_halt(struct target *target)
501 {
502 LOG_DEBUG("%s", __func__);
503 return ERROR_OK;
504 }
505
506 static int adapter_halt(struct target *target)
507 {
508 int res;
509 struct hl_interface_s *adapter = target_to_adapter(target);
510
511 LOG_DEBUG("%s", __func__);
512
513 if (target->state == TARGET_HALTED) {
514 LOG_DEBUG("target was already halted");
515 return ERROR_OK;
516 }
517
518 if (target->state == TARGET_UNKNOWN)
519 LOG_WARNING("target was in unknown state when halt was requested");
520
521 res = adapter->layout->api->halt(adapter->fd);
522
523 if (res != ERROR_OK)
524 return res;
525
526 target->debug_reason = DBG_REASON_DBGRQ;
527
528 return ERROR_OK;
529 }
530
531 static int adapter_resume(struct target *target, int current,
532 uint32_t address, int handle_breakpoints,
533 int debug_execution)
534 {
535 int res;
536 struct hl_interface_s *adapter = target_to_adapter(target);
537 struct armv7m_common *armv7m = target_to_armv7m(target);
538 uint32_t resume_pc;
539 struct breakpoint *breakpoint = NULL;
540 struct reg *pc;
541
542 LOG_DEBUG("%s %d 0x%08x %d %d", __func__, current, address,
543 handle_breakpoints, debug_execution);
544
545 if (target->state != TARGET_HALTED) {
546 LOG_WARNING("target not halted");
547 return ERROR_TARGET_NOT_HALTED;
548 }
549
550 if (!debug_execution) {
551 target_free_all_working_areas(target);
552 cortex_m3_enable_breakpoints(target);
553 cortex_m3_enable_watchpoints(target);
554 }
555
556 pc = armv7m->arm.pc;
557 if (!current) {
558 buf_set_u32(pc->value, 0, 32, address);
559 pc->dirty = true;
560 pc->valid = true;
561 }
562
563 if (!breakpoint_find(target, buf_get_u32(pc->value, 0, 32))
564 && !debug_execution) {
565 armv7m_maybe_skip_bkpt_inst(target, NULL);
566 }
567
568 resume_pc = buf_get_u32(pc->value, 0, 32);
569
570 /* write any user vector flags */
571 res = target_write_u32(target, DCB_DEMCR, TRCENA | armv7m->demcr);
572 if (res != ERROR_OK)
573 return res;
574
575 armv7m_restore_context(target);
576
577 /* registers are now invalid */
578 register_cache_invalidate(armv7m->arm.core_cache);
579
580 /* the front-end may request us not to handle breakpoints */
581 if (handle_breakpoints) {
582 /* Single step past breakpoint at current address */
583 breakpoint = breakpoint_find(target, resume_pc);
584 if (breakpoint) {
585 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (ID: %d)",
586 breakpoint->address,
587 breakpoint->unique_id);
588 cortex_m3_unset_breakpoint(target, breakpoint);
589
590 res = adapter->layout->api->step(adapter->fd);
591
592 if (res != ERROR_OK)
593 return res;
594
595 cortex_m3_set_breakpoint(target, breakpoint);
596 }
597 }
598
599 res = adapter->layout->api->run(adapter->fd);
600
601 if (res != ERROR_OK)
602 return res;
603
604 target->state = TARGET_RUNNING;
605 target->debug_reason = DBG_REASON_NOTHALTED;
606
607 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
608
609 return ERROR_OK;
610 }
611
612 static int adapter_step(struct target *target, int current,
613 uint32_t address, int handle_breakpoints)
614 {
615 int res;
616 struct hl_interface_s *adapter = target_to_adapter(target);
617 struct armv7m_common *armv7m = target_to_armv7m(target);
618 struct breakpoint *breakpoint = NULL;
619 struct reg *pc = armv7m->arm.pc;
620 bool bkpt_inst_found = false;
621
622 LOG_DEBUG("%s", __func__);
623
624 if (target->state != TARGET_HALTED) {
625 LOG_WARNING("target not halted");
626 return ERROR_TARGET_NOT_HALTED;
627 }
628
629 if (!current) {
630 buf_set_u32(pc->value, 0, 32, address);
631 pc->dirty = true;
632 pc->valid = true;
633 }
634
635 uint32_t pc_value = buf_get_u32(pc->value, 0, 32);
636
637 /* the front-end may request us not to handle breakpoints */
638 if (handle_breakpoints) {
639 breakpoint = breakpoint_find(target, pc_value);
640 if (breakpoint)
641 cortex_m3_unset_breakpoint(target, breakpoint);
642 }
643
644 armv7m_maybe_skip_bkpt_inst(target, &bkpt_inst_found);
645
646 target->debug_reason = DBG_REASON_SINGLESTEP;
647
648 armv7m_restore_context(target);
649
650 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
651
652 res = adapter->layout->api->step(adapter->fd);
653
654 if (res != ERROR_OK)
655 return res;
656
657 /* registers are now invalid */
658 register_cache_invalidate(armv7m->arm.core_cache);
659
660 if (breakpoint)
661 cortex_m3_set_breakpoint(target, breakpoint);
662
663 adapter_debug_entry(target);
664 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
665
666 LOG_INFO("halted: PC: 0x%08x", buf_get_u32(armv7m->arm.pc->value, 0, 32));
667
668 return ERROR_OK;
669 }
670
671 static int adapter_read_memory(struct target *target, uint32_t address,
672 uint32_t size, uint32_t count,
673 uint8_t *buffer)
674 {
675 struct hl_interface_s *adapter = target_to_adapter(target);
676 int res;
677 uint32_t buffer_threshold = (adapter->param.max_buffer / 4);
678 uint32_t addr_increment = 4;
679 uint32_t c;
680
681 if (!count || !buffer)
682 return ERROR_COMMAND_SYNTAX_ERROR;
683
684 LOG_DEBUG("%s 0x%08x %d %d", __func__, address, size, count);
685
686 /* prepare byte count, buffer threshold
687 * and address increment for none 32bit access
688 */
689 if (size != 4) {
690 count *= size;
691 buffer_threshold = (adapter->param.max_buffer / 4) / 2;
692 addr_increment = 1;
693 }
694
695 while (count) {
696 if (count > buffer_threshold)
697 c = buffer_threshold;
698 else
699 c = count;
700
701 if (size != 4)
702 res = adapter->layout->api->read_mem8(adapter->fd,
703 address, c, buffer);
704 else
705 res = adapter->layout->api->read_mem32(adapter->fd,
706 address, c, buffer);
707
708 if (res != ERROR_OK)
709 return res;
710
711 address += (c * addr_increment);
712 buffer += (c * addr_increment);
713 count -= c;
714 }
715
716 return ERROR_OK;
717 }
718
719 static int adapter_write_memory(struct target *target, uint32_t address,
720 uint32_t size, uint32_t count,
721 const uint8_t *buffer)
722 {
723 struct hl_interface_s *adapter = target_to_adapter(target);
724 int res;
725 uint32_t buffer_threshold = (adapter->param.max_buffer / 4);
726 uint32_t addr_increment = 4;
727 uint32_t c;
728
729 if (!count || !buffer)
730 return ERROR_COMMAND_SYNTAX_ERROR;
731
732 LOG_DEBUG("%s 0x%08x %d %d", __func__, address, size, count);
733
734 /* prepare byte count, buffer threshold
735 * and address increment for none 32bit access
736 */
737 if (size != 4) {
738 count *= size;
739 buffer_threshold = (adapter->param.max_buffer / 4) / 2;
740 addr_increment = 1;
741 }
742
743 while (count) {
744 if (count > buffer_threshold)
745 c = buffer_threshold;
746 else
747 c = count;
748
749 if (size != 4)
750 res = adapter->layout->api->write_mem8(adapter->fd,
751 address, c, buffer);
752 else
753 res = adapter->layout->api->write_mem32(adapter->fd,
754 address, c, buffer);
755
756 if (res != ERROR_OK)
757 return res;
758
759 address += (c * addr_increment);
760 buffer += (c * addr_increment);
761 count -= c;
762 }
763
764 return ERROR_OK;
765 }
766
767 static int adapter_bulk_write_memory(struct target *target,
768 uint32_t address, uint32_t count,
769 const uint8_t *buffer)
770 {
771 return adapter_write_memory(target, address, 4, count, buffer);
772 }
773
774 static const struct command_registration adapter_command_handlers[] = {
775 {
776 .chain = arm_command_handlers,
777 },
778 COMMAND_REGISTRATION_DONE
779 };
780
781 struct target_type hla_target = {
782 .name = "hla_target",
783 .deprecated_name = "stm32_stlink",
784
785 .init_target = adapter_init_target,
786 .target_create = adapter_target_create,
787 .examine = cortex_m3_examine,
788 .commands = adapter_command_handlers,
789
790 .poll = adapter_poll,
791 .arch_state = armv7m_arch_state,
792
793 .assert_reset = adapter_assert_reset,
794 .deassert_reset = adapter_deassert_reset,
795 .soft_reset_halt = adapter_soft_reset_halt,
796
797 .halt = adapter_halt,
798 .resume = adapter_resume,
799 .step = adapter_step,
800
801 .get_gdb_reg_list = armv7m_get_gdb_reg_list,
802
803 .read_memory = adapter_read_memory,
804 .write_memory = adapter_write_memory,
805 .bulk_write_memory = adapter_bulk_write_memory,
806 .checksum_memory = armv7m_checksum_memory,
807 .blank_check_memory = armv7m_blank_check_memory,
808
809 .run_algorithm = armv7m_run_algorithm,
810 .start_algorithm = armv7m_start_algorithm,
811 .wait_algorithm = armv7m_wait_algorithm,
812
813 .add_breakpoint = cortex_m3_add_breakpoint,
814 .remove_breakpoint = cortex_m3_remove_breakpoint,
815 .add_watchpoint = cortex_m3_add_watchpoint,
816 .remove_watchpoint = cortex_m3_remove_watchpoint,
817 };
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