Fix maintainer-clean target in doc directory.
[openocd.git] / src / target / arm7_9_common.c
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007,2008 √ėyvind Harboe *
6 * oyvind.harboe@zylin.com *
7 * *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
10 * *
11 * Copyright (C) 2008 by Hongtao Zheng *
12 * hontor@126.com *
13 * *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
18 * *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
23 * *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
28 ***************************************************************************/
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32
33 #include "embeddedice.h"
34 #include "target_request.h"
35 #include "arm7_9_common.h"
36 #include "time_support.h"
37 #include "arm_simulator.h"
38
39
40 int arm7_9_debug_entry(target_t *target);
41 int arm7_9_enable_sw_bkpts(struct target_s *target);
42
43 /* command handler forward declarations */
44 int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
45 int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
46 int handle_arm7_9_read_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
47 int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
48 int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
49 int handle_arm7_9_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
50 int handle_arm7_9_dcc_downloads_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
51 int handle_arm7_9_etm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
52
53 /**
54 * Clear watchpoints for an ARM7/9 target.
55 *
56 * @param arm7_9 Pointer to the common struct for an ARM7/9 target
57 * @return JTAG error status after executing queue
58 */
59 static int arm7_9_clear_watchpoints(arm7_9_common_t *arm7_9)
60 {
61 LOG_DEBUG("-");
62 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
63 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
64 arm7_9->sw_breakpoints_added = 0;
65 arm7_9->wp0_used = 0;
66 arm7_9->wp1_used = arm7_9->wp1_used_default;
67 arm7_9->wp_available = arm7_9->wp_available_max;
68
69 return jtag_execute_queue();
70 }
71
72 /**
73 * Assign a watchpoint to one of the two available hardware comparators in an
74 * ARM7 or ARM9 target.
75 *
76 * @param arm7_9 Pointer to the common struct for an ARM7/9 target
77 * @param breakpoint Pointer to the breakpoint to be used as a watchpoint
78 */
79 static void arm7_9_assign_wp(arm7_9_common_t *arm7_9, breakpoint_t *breakpoint)
80 {
81 if (!arm7_9->wp0_used)
82 {
83 arm7_9->wp0_used = 1;
84 breakpoint->set = 1;
85 arm7_9->wp_available--;
86 }
87 else if (!arm7_9->wp1_used)
88 {
89 arm7_9->wp1_used = 1;
90 breakpoint->set = 2;
91 arm7_9->wp_available--;
92 }
93 else
94 {
95 LOG_ERROR("BUG: no hardware comparator available");
96 }
97 LOG_DEBUG("BPID: %d (0x%08" PRIx32 ") using hw wp: %d",
98 breakpoint->unique_id,
99 breakpoint->address,
100 breakpoint->set );
101 }
102
103 /**
104 * Setup an ARM7/9 target's embedded ICE registers for software breakpoints.
105 *
106 * @param arm7_9 Pointer to common struct for ARM7/9 targets
107 * @return Error codes if there is a problem finding a watchpoint or the result
108 * of executing the JTAG queue
109 */
110 static int arm7_9_set_software_breakpoints(arm7_9_common_t *arm7_9)
111 {
112 if (arm7_9->sw_breakpoints_added)
113 {
114 return ERROR_OK;
115 }
116 if (arm7_9->wp_available < 1)
117 {
118 LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
119 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
120 }
121 arm7_9->wp_available--;
122
123 /* pick a breakpoint unit */
124 if (!arm7_9->wp0_used)
125 {
126 arm7_9->sw_breakpoints_added = 1;
127 arm7_9->wp0_used = 3;
128 } else if (!arm7_9->wp1_used)
129 {
130 arm7_9->sw_breakpoints_added = 2;
131 arm7_9->wp1_used = 3;
132 }
133 else
134 {
135 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
136 return ERROR_FAIL;
137 }
138
139 if (arm7_9->sw_breakpoints_added == 1)
140 {
141 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
142 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
143 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
144 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
145 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
146 }
147 else if (arm7_9->sw_breakpoints_added == 2)
148 {
149 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
150 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
151 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
152 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
153 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
154 }
155 else
156 {
157 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
158 return ERROR_FAIL;
159 }
160 LOG_DEBUG("SW BP using hw wp: %d",
161 arm7_9->sw_breakpoints_added );
162
163 return jtag_execute_queue();
164 }
165
166 /**
167 * Setup the common pieces for an ARM7/9 target after reset or on startup.
168 *
169 * @param target Pointer to an ARM7/9 target to setup
170 * @return Result of clearing the watchpoints on the target
171 */
172 int arm7_9_setup(target_t *target)
173 {
174 armv4_5_common_t *armv4_5 = target->arch_info;
175 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
176
177 return arm7_9_clear_watchpoints(arm7_9);
178 }
179
180 /**
181 * Retrieves the architecture information pointers for ARMv4/5 and ARM7/9
182 * targets. A return of ERROR_OK signifies that the target is a valid target
183 * and that the pointers have been set properly.
184 *
185 * @param target Pointer to the target device to get the pointers from
186 * @param armv4_5_p Pointer to be filled in with the common struct for ARMV4/5
187 * targets
188 * @param arm7_9_p Pointer to be filled in with the common struct for ARM7/9
189 * targets
190 * @return ERROR_OK if successful
191 */
192 int arm7_9_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p)
193 {
194 armv4_5_common_t *armv4_5 = target->arch_info;
195 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
196
197 if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
198 {
199 return -1;
200 }
201
202 if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
203 {
204 return -1;
205 }
206
207 *armv4_5_p = armv4_5;
208 *arm7_9_p = arm7_9;
209
210 return ERROR_OK;
211 }
212
213 /**
214 * Set either a hardware or software breakpoint on an ARM7/9 target. The
215 * breakpoint is set up even if it is already set. Some actions, e.g. reset,
216 * might have erased the values in Embedded ICE.
217 *
218 * @param target Pointer to the target device to set the breakpoints on
219 * @param breakpoint Pointer to the breakpoint to be set
220 * @return For hardware breakpoints, this is the result of executing the JTAG
221 * queue. For software breakpoints, this will be the status of the
222 * required memory reads and writes
223 */
224 int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
225 {
226 armv4_5_common_t *armv4_5 = target->arch_info;
227 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
228 int retval = ERROR_OK;
229
230 LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32,
231 breakpoint->unique_id,
232 breakpoint->address );
233
234 if (target->state != TARGET_HALTED)
235 {
236 LOG_WARNING("target not halted");
237 return ERROR_TARGET_NOT_HALTED;
238 }
239
240 if (breakpoint->type == BKPT_HARD)
241 {
242 /* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
243 uint32_t mask = (breakpoint->length == 4) ? 0x3u : 0x1u;
244
245 /* reassign a hw breakpoint */
246 if (breakpoint->set == 0)
247 {
248 arm7_9_assign_wp(arm7_9, breakpoint);
249 }
250
251 if (breakpoint->set == 1)
252 {
253 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], breakpoint->address);
254 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
255 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffffu);
256 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
257 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
258 }
259 else if (breakpoint->set == 2)
260 {
261 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], breakpoint->address);
262 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
263 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffffu);
264 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
265 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
266 }
267 else
268 {
269 LOG_ERROR("BUG: no hardware comparator available");
270 return ERROR_OK;
271 }
272
273 retval = jtag_execute_queue();
274 }
275 else if (breakpoint->type == BKPT_SOFT)
276 {
277 if ((retval = arm7_9_set_software_breakpoints(arm7_9)) != ERROR_OK)
278 return retval;
279
280 /* did we already set this breakpoint? */
281 if (breakpoint->set)
282 return ERROR_OK;
283
284 if (breakpoint->length == 4)
285 {
286 uint32_t verify = 0xffffffff;
287 /* keep the original instruction in target endianness */
288 if ((retval = target_read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr)) != ERROR_OK)
289 {
290 return retval;
291 }
292 /* write the breakpoint instruction in target endianness (arm7_9->arm_bkpt is host endian) */
293 if ((retval = target_write_u32(target, breakpoint->address, arm7_9->arm_bkpt)) != ERROR_OK)
294 {
295 return retval;
296 }
297
298 if ((retval = target_read_u32(target, breakpoint->address, &verify)) != ERROR_OK)
299 {
300 return retval;
301 }
302 if (verify != arm7_9->arm_bkpt)
303 {
304 LOG_ERROR("Unable to set 32 bit software breakpoint at address %08" PRIx32 " - check that memory is read/writable", breakpoint->address);
305 return ERROR_OK;
306 }
307 }
308 else
309 {
310 uint16_t verify = 0xffff;
311 /* keep the original instruction in target endianness */
312 if ((retval = target_read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr)) != ERROR_OK)
313 {
314 return retval;
315 }
316 /* write the breakpoint instruction in target endianness (arm7_9->thumb_bkpt is host endian) */
317 if ((retval = target_write_u16(target, breakpoint->address, arm7_9->thumb_bkpt)) != ERROR_OK)
318 {
319 return retval;
320 }
321
322 if ((retval = target_read_u16(target, breakpoint->address, &verify)) != ERROR_OK)
323 {
324 return retval;
325 }
326 if (verify != arm7_9->thumb_bkpt)
327 {
328 LOG_ERROR("Unable to set thumb software breakpoint at address %08" PRIx32 " - check that memory is read/writable", breakpoint->address);
329 return ERROR_OK;
330 }
331 }
332 breakpoint->set = 1;
333 }
334
335 return retval;
336 }
337
338 /**
339 * Unsets an existing breakpoint on an ARM7/9 target. If it is a hardware
340 * breakpoint, the watchpoint used will be freed and the Embedded ICE registers
341 * will be updated. Otherwise, the software breakpoint will be restored to its
342 * original instruction if it hasn't already been modified.
343 *
344 * @param target Pointer to ARM7/9 target to unset the breakpoint from
345 * @param breakpoint Pointer to breakpoint to be unset
346 * @return For hardware breakpoints, this is the result of executing the JTAG
347 * queue. For software breakpoints, this will be the status of the
348 * required memory reads and writes
349 */
350 int arm7_9_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
351 {
352 int retval = ERROR_OK;
353
354 armv4_5_common_t *armv4_5 = target->arch_info;
355 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
356
357 LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32,
358 breakpoint->unique_id,
359 breakpoint->address );
360
361 if (!breakpoint->set)
362 {
363 LOG_WARNING("breakpoint not set");
364 return ERROR_OK;
365 }
366
367 if (breakpoint->type == BKPT_HARD)
368 {
369 LOG_DEBUG("BPID: %d Releasing hw wp: %d",
370 breakpoint->unique_id,
371 breakpoint->set );
372 if (breakpoint->set == 1)
373 {
374 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
375 arm7_9->wp0_used = 0;
376 arm7_9->wp_available++;
377 }
378 else if (breakpoint->set == 2)
379 {
380 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
381 arm7_9->wp1_used = 0;
382 arm7_9->wp_available++;
383 }
384 retval = jtag_execute_queue();
385 breakpoint->set = 0;
386 }
387 else
388 {
389 /* restore original instruction (kept in target endianness) */
390 if (breakpoint->length == 4)
391 {
392 uint32_t current_instr;
393 /* check that user program as not modified breakpoint instruction */
394 if ((retval = target_read_memory(target, breakpoint->address, 4, 1, (uint8_t*)&current_instr)) != ERROR_OK)
395 {
396 return retval;
397 }
398 if (current_instr == arm7_9->arm_bkpt)
399 if ((retval = target_write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr)) != ERROR_OK)
400 {
401 return retval;
402 }
403 }
404 else
405 {
406 uint16_t current_instr;
407 /* check that user program as not modified breakpoint instruction */
408 if ((retval = target_read_memory(target, breakpoint->address, 2, 1, (uint8_t*)&current_instr)) != ERROR_OK)
409 {
410 return retval;
411 }
412 if (current_instr == arm7_9->thumb_bkpt)
413 if ((retval = target_write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr)) != ERROR_OK)
414 {
415 return retval;
416 }
417 }
418 breakpoint->set = 0;
419 }
420
421 return retval;
422 }
423
424 /**
425 * Add a breakpoint to an ARM7/9 target. This makes sure that there are no
426 * dangling breakpoints and that the desired breakpoint can be added.
427 *
428 * @param target Pointer to the target ARM7/9 device to add a breakpoint to
429 * @param breakpoint Pointer to the breakpoint to be added
430 * @return An error status if there is a problem adding the breakpoint or the
431 * result of setting the breakpoint
432 */
433 int arm7_9_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
434 {
435 armv4_5_common_t *armv4_5 = target->arch_info;
436 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
437
438 if (target->state != TARGET_HALTED)
439 {
440 LOG_WARNING("target not halted");
441 return ERROR_TARGET_NOT_HALTED;
442 }
443
444 if (arm7_9->breakpoint_count == 0)
445 {
446 /* make sure we don't have any dangling breakpoints. This is vital upon
447 * GDB connect/disconnect
448 */
449 arm7_9_clear_watchpoints(arm7_9);
450 }
451
452 if ((breakpoint->type == BKPT_HARD) && (arm7_9->wp_available < 1))
453 {
454 LOG_INFO("no watchpoint unit available for hardware breakpoint");
455 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
456 }
457
458 if ((breakpoint->length != 2) && (breakpoint->length != 4))
459 {
460 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
461 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
462 }
463
464 if (breakpoint->type == BKPT_HARD)
465 {
466 arm7_9_assign_wp(arm7_9, breakpoint);
467 }
468
469 arm7_9->breakpoint_count++;
470
471 return arm7_9_set_breakpoint(target, breakpoint);
472 }
473
474 /**
475 * Removes a breakpoint from an ARM7/9 target. This will make sure there are no
476 * dangling breakpoints and updates available watchpoints if it is a hardware
477 * breakpoint.
478 *
479 * @param target Pointer to the target to have a breakpoint removed
480 * @param breakpoint Pointer to the breakpoint to be removed
481 * @return Error status if there was a problem unsetting the breakpoint or the
482 * watchpoints could not be cleared
483 */
484 int arm7_9_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
485 {
486 int retval = ERROR_OK;
487 armv4_5_common_t *armv4_5 = target->arch_info;
488 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
489
490 if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
491 {
492 return retval;
493 }
494
495 if (breakpoint->type == BKPT_HARD)
496 arm7_9->wp_available++;
497
498 arm7_9->breakpoint_count--;
499 if (arm7_9->breakpoint_count == 0)
500 {
501 /* make sure we don't have any dangling breakpoints */
502 if ((retval = arm7_9_clear_watchpoints(arm7_9)) != ERROR_OK)
503 {
504 return retval;
505 }
506 }
507
508 return ERROR_OK;
509 }
510
511 /**
512 * Sets a watchpoint for an ARM7/9 target in one of the watchpoint units. It is
513 * considered a bug to call this function when there are no available watchpoint
514 * units.
515 *
516 * @param target Pointer to an ARM7/9 target to set a watchpoint on
517 * @param watchpoint Pointer to the watchpoint to be set
518 * @return Error status if watchpoint set fails or the result of executing the
519 * JTAG queue
520 */
521 int arm7_9_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
522 {
523 int retval = ERROR_OK;
524 armv4_5_common_t *armv4_5 = target->arch_info;
525 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
526 int rw_mask = 1;
527 uint32_t mask;
528
529 mask = watchpoint->length - 1;
530
531 if (target->state != TARGET_HALTED)
532 {
533 LOG_WARNING("target not halted");
534 return ERROR_TARGET_NOT_HALTED;
535 }
536
537 if (watchpoint->rw == WPT_ACCESS)
538 rw_mask = 0;
539 else
540 rw_mask = 1;
541
542 if (!arm7_9->wp0_used)
543 {
544 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], watchpoint->address);
545 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
546 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], watchpoint->mask);
547 if (watchpoint->mask != 0xffffffffu)
548 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], watchpoint->value);
549 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
550 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
551
552 if ((retval = jtag_execute_queue()) != ERROR_OK)
553 {
554 return retval;
555 }
556 watchpoint->set = 1;
557 arm7_9->wp0_used = 2;
558 }
559 else if (!arm7_9->wp1_used)
560 {
561 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], watchpoint->address);
562 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
563 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], watchpoint->mask);
564 if (watchpoint->mask != 0xffffffffu)
565 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], watchpoint->value);
566 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
567 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
568
569 if ((retval = jtag_execute_queue()) != ERROR_OK)
570 {
571 return retval;
572 }
573 watchpoint->set = 2;
574 arm7_9->wp1_used = 2;
575 }
576 else
577 {
578 LOG_ERROR("BUG: no hardware comparator available");
579 return ERROR_OK;
580 }
581
582 return ERROR_OK;
583 }
584
585 /**
586 * Unset an existing watchpoint and clear the used watchpoint unit.
587 *
588 * @param target Pointer to the target to have the watchpoint removed
589 * @param watchpoint Pointer to the watchpoint to be removed
590 * @return Error status while trying to unset the watchpoint or the result of
591 * executing the JTAG queue
592 */
593 int arm7_9_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
594 {
595 int retval = ERROR_OK;
596 armv4_5_common_t *armv4_5 = target->arch_info;
597 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
598
599 if (target->state != TARGET_HALTED)
600 {
601 LOG_WARNING("target not halted");
602 return ERROR_TARGET_NOT_HALTED;
603 }
604
605 if (!watchpoint->set)
606 {
607 LOG_WARNING("breakpoint not set");
608 return ERROR_OK;
609 }
610
611 if (watchpoint->set == 1)
612 {
613 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
614 if ((retval = jtag_execute_queue()) != ERROR_OK)
615 {
616 return retval;
617 }
618 arm7_9->wp0_used = 0;
619 }
620 else if (watchpoint->set == 2)
621 {
622 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
623 if ((retval = jtag_execute_queue()) != ERROR_OK)
624 {
625 return retval;
626 }
627 arm7_9->wp1_used = 0;
628 }
629 watchpoint->set = 0;
630
631 return ERROR_OK;
632 }
633
634 /**
635 * Add a watchpoint to an ARM7/9 target. If there are no watchpoint units
636 * available, an error response is returned.
637 *
638 * @param target Pointer to the ARM7/9 target to add a watchpoint to
639 * @param watchpoint Pointer to the watchpoint to be added
640 * @return Error status while trying to add the watchpoint
641 */
642 int arm7_9_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
643 {
644 armv4_5_common_t *armv4_5 = target->arch_info;
645 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
646
647 if (target->state != TARGET_HALTED)
648 {
649 LOG_WARNING("target not halted");
650 return ERROR_TARGET_NOT_HALTED;
651 }
652
653 if (arm7_9->wp_available < 1)
654 {
655 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
656 }
657
658 if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
659 {
660 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
661 }
662
663 arm7_9->wp_available--;
664
665 return ERROR_OK;
666 }
667
668 /**
669 * Remove a watchpoint from an ARM7/9 target. The watchpoint will be unset and
670 * the used watchpoint unit will be reopened.
671 *
672 * @param target Pointer to the target to remove a watchpoint from
673 * @param watchpoint Pointer to the watchpoint to be removed
674 * @return Result of trying to unset the watchpoint
675 */
676 int arm7_9_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
677 {
678 int retval = ERROR_OK;
679 armv4_5_common_t *armv4_5 = target->arch_info;
680 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
681
682 if (watchpoint->set)
683 {
684 if ((retval = arm7_9_unset_watchpoint(target, watchpoint)) != ERROR_OK)
685 {
686 return retval;
687 }
688 }
689
690 arm7_9->wp_available++;
691
692 return ERROR_OK;
693 }
694
695 /**
696 * Restarts the target by sending a RESTART instruction and moving the JTAG
697 * state to IDLE. This includes a timeout waiting for DBGACK and SYSCOMP to be
698 * asserted by the processor.
699 *
700 * @param target Pointer to target to issue commands to
701 * @return Error status if there is a timeout or a problem while executing the
702 * JTAG queue
703 */
704 int arm7_9_execute_sys_speed(struct target_s *target)
705 {
706 int retval;
707
708 armv4_5_common_t *armv4_5 = target->arch_info;
709 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
710 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
711 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
712
713 /* set RESTART instruction */
714 jtag_set_end_state(TAP_IDLE);
715 if (arm7_9->need_bypass_before_restart) {
716 arm7_9->need_bypass_before_restart = 0;
717 arm_jtag_set_instr(jtag_info, 0xf, NULL);
718 }
719 arm_jtag_set_instr(jtag_info, 0x4, NULL);
720
721 long long then = timeval_ms();
722 int timeout;
723 while (!(timeout = ((timeval_ms()-then) > 1000)))
724 {
725 /* read debug status register */
726 embeddedice_read_reg(dbg_stat);
727 if ((retval = jtag_execute_queue()) != ERROR_OK)
728 return retval;
729 if ((buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
730 && (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_SYSCOMP, 1)))
731 break;
732 if (debug_level >= 3)
733 {
734 alive_sleep(100);
735 } else
736 {
737 keep_alive();
738 }
739 }
740 if (timeout)
741 {
742 LOG_ERROR("timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: %" PRIx32 "", buf_get_u32(dbg_stat->value, 0, dbg_stat->size));
743 return ERROR_TARGET_TIMEOUT;
744 }
745
746 return ERROR_OK;
747 }
748
749 /**
750 * Restarts the target by sending a RESTART instruction and moving the JTAG
751 * state to IDLE. This validates that DBGACK and SYSCOMP are set without
752 * waiting until they are.
753 *
754 * @param target Pointer to the target to issue commands to
755 * @return Always ERROR_OK
756 */
757 int arm7_9_execute_fast_sys_speed(struct target_s *target)
758 {
759 static int set = 0;
760 static uint8_t check_value[4], check_mask[4];
761
762 armv4_5_common_t *armv4_5 = target->arch_info;
763 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
764 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
765 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
766
767 /* set RESTART instruction */
768 jtag_set_end_state(TAP_IDLE);
769 if (arm7_9->need_bypass_before_restart) {
770 arm7_9->need_bypass_before_restart = 0;
771 arm_jtag_set_instr(jtag_info, 0xf, NULL);
772 }
773 arm_jtag_set_instr(jtag_info, 0x4, NULL);
774
775 if (!set)
776 {
777 /* check for DBGACK and SYSCOMP set (others don't care) */
778
779 /* NB! These are constants that must be available until after next jtag_execute() and
780 * we evaluate the values upon first execution in lieu of setting up these constants
781 * during early setup.
782 * */
783 buf_set_u32(check_value, 0, 32, 0x9);
784 buf_set_u32(check_mask, 0, 32, 0x9);
785 set = 1;
786 }
787
788 /* read debug status register */
789 embeddedice_read_reg_w_check(dbg_stat, check_value, check_mask);
790
791 return ERROR_OK;
792 }
793
794 /**
795 * Get some data from the ARM7/9 target.
796 *
797 * @param target Pointer to the ARM7/9 target to read data from
798 * @param size The number of 32bit words to be read
799 * @param buffer Pointer to the buffer that will hold the data
800 * @return The result of receiving data from the Embedded ICE unit
801 */
802 int arm7_9_target_request_data(target_t *target, uint32_t size, uint8_t *buffer)
803 {
804 armv4_5_common_t *armv4_5 = target->arch_info;
805 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
806 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
807 uint32_t *data;
808 int retval = ERROR_OK;
809 uint32_t i;
810
811 data = malloc(size * (sizeof(uint32_t)));
812
813 retval = embeddedice_receive(jtag_info, data, size);
814
815 /* return the 32-bit ints in the 8-bit array */
816 for (i = 0; i < size; i++)
817 {
818 h_u32_to_le(buffer + (i * 4), data[i]);
819 }
820
821 free(data);
822
823 return retval;
824 }
825
826 /**
827 * Handles requests to an ARM7/9 target. If debug messaging is enabled, the
828 * target is running and the DCC control register has the W bit high, this will
829 * execute the request on the target.
830 *
831 * @param priv Void pointer expected to be a target_t pointer
832 * @return ERROR_OK unless there are issues with the JTAG queue or when reading
833 * from the Embedded ICE unit
834 */
835 int arm7_9_handle_target_request(void *priv)
836 {
837 int retval = ERROR_OK;
838 target_t *target = priv;
839 if (!target_was_examined(target))
840 return ERROR_OK;
841 armv4_5_common_t *armv4_5 = target->arch_info;
842 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
843 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
844 reg_t *dcc_control = &arm7_9->eice_cache->reg_list[EICE_COMMS_CTRL];
845
846 if (!target->dbg_msg_enabled)
847 return ERROR_OK;
848
849 if (target->state == TARGET_RUNNING)
850 {
851 /* read DCC control register */
852 embeddedice_read_reg(dcc_control);
853 if ((retval = jtag_execute_queue()) != ERROR_OK)
854 {
855 return retval;
856 }
857
858 /* check W bit */
859 if (buf_get_u32(dcc_control->value, 1, 1) == 1)
860 {
861 uint32_t request;
862
863 if ((retval = embeddedice_receive(jtag_info, &request, 1)) != ERROR_OK)
864 {
865 return retval;
866 }
867 if ((retval = target_request(target, request)) != ERROR_OK)
868 {
869 return retval;
870 }
871 }
872 }
873
874 return ERROR_OK;
875 }
876
877 /**
878 * Polls an ARM7/9 target for its current status. If DBGACK is set, the target
879 * is manipulated to the right halted state based on its current state. This is
880 * what happens:
881 *
882 * <table>
883 * <tr><th > State</th><th > Action</th></tr>
884 * <tr><td > TARGET_RUNNING | TARGET_RESET</td><td > Enters debug mode. If TARGET_RESET, pc may be checked</td></tr>
885 * <tr><td > TARGET_UNKNOWN</td><td > Warning is logged</td></tr>
886 * <tr><td > TARGET_DEBUG_RUNNING</td><td > Enters debug mode</td></tr>
887 * <tr><td > TARGET_HALTED</td><td > Nothing</td></tr>
888 * </table>
889 *
890 * If the target does not end up in the halted state, a warning is produced. If
891 * DBGACK is cleared, then the target is expected to either be running or
892 * running in debug.
893 *
894 * @param target Pointer to the ARM7/9 target to poll
895 * @return ERROR_OK or an error status if a command fails
896 */
897 int arm7_9_poll(target_t *target)
898 {
899 int retval;
900 armv4_5_common_t *armv4_5 = target->arch_info;
901 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
902 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
903
904 /* read debug status register */
905 embeddedice_read_reg(dbg_stat);
906 if ((retval = jtag_execute_queue()) != ERROR_OK)
907 {
908 return retval;
909 }
910
911 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
912 {
913 /* LOG_DEBUG("DBGACK set, dbg_state->value: 0x%x", buf_get_u32(dbg_stat->value, 0, 32));*/
914 if (target->state == TARGET_UNKNOWN)
915 {
916 /* Starting OpenOCD with target in debug-halt */
917 target->state = TARGET_RUNNING;
918 LOG_DEBUG("DBGACK already set during server startup.");
919 }
920 if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET))
921 {
922 int check_pc = 0;
923 if (target->state == TARGET_RESET)
924 {
925 if (target->reset_halt)
926 {
927 enum reset_types jtag_reset_config = jtag_get_reset_config();
928 if ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0)
929 {
930 check_pc = 1;
931 }
932 }
933 }
934
935 target->state = TARGET_HALTED;
936
937 if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
938 return retval;
939
940 if (check_pc)
941 {
942 reg_t *reg = register_get_by_name(target->reg_cache, "pc", 1);
943 uint32_t t=*((uint32_t *)reg->value);
944 if (t != 0)
945 {
946 LOG_ERROR("PC was not 0. Does this target need srst_pulls_trst?");
947 }
948 }
949
950 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
951 {
952 return retval;
953 }
954 }
955 if (target->state == TARGET_DEBUG_RUNNING)
956 {
957 target->state = TARGET_HALTED;
958 if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
959 return retval;
960
961 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED)) != ERROR_OK)
962 {
963 return retval;
964 }
965 }
966 if (target->state != TARGET_HALTED)
967 {
968 LOG_WARNING("DBGACK set, but the target did not end up in the halted state %d", target->state);
969 }
970 }
971 else
972 {
973 if (target->state != TARGET_DEBUG_RUNNING)
974 target->state = TARGET_RUNNING;
975 }
976
977 return ERROR_OK;
978 }
979
980 /**
981 * Asserts the reset (SRST) on an ARM7/9 target. Some -S targets (ARM966E-S in
982 * the STR912 isn't affected, ARM926EJ-S in the LPC3180 and AT91SAM9260 is
983 * affected) completely stop the JTAG clock while the core is held in reset
984 * (SRST). It isn't possible to program the halt condition once reset is
985 * asserted, hence a hook that allows the target to set up its reset-halt
986 * condition is setup prior to asserting reset.
987 *
988 * @param target Pointer to an ARM7/9 target to assert reset on
989 * @return ERROR_FAIL if the JTAG device does not have SRST, otherwise ERROR_OK
990 */
991 int arm7_9_assert_reset(target_t *target)
992 {
993 armv4_5_common_t *armv4_5 = target->arch_info;
994 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
995 LOG_DEBUG("target->state: %s",
996 target_state_name(target));
997
998 enum reset_types jtag_reset_config = jtag_get_reset_config();
999 if (!(jtag_reset_config & RESET_HAS_SRST))
1000 {
1001 LOG_ERROR("Can't assert SRST");
1002 return ERROR_FAIL;
1003 }
1004
1005 if (target->reset_halt)
1006 {
1007 /*
1008 * Some targets do not support communication while SRST is asserted. We need to
1009 * set up the reset vector catch here.
1010 *
1011 * If TRST is asserted, then these settings will be reset anyway, so setting them
1012 * here is harmless.
1013 */
1014 if (arm7_9->has_vector_catch)
1015 {
1016 /* program vector catch register to catch reset vector */
1017 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH], 0x1);
1018 }
1019 else
1020 {
1021 /* program watchpoint unit to match on reset vector address */
1022 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], 0x0);
1023 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0x3);
1024 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1025 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
1026 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
1027 }
1028 }
1029
1030 /* here we should issue an SRST only, but we may have to assert TRST as well */
1031 if (jtag_reset_config & RESET_SRST_PULLS_TRST)
1032 {
1033 jtag_add_reset(1, 1);
1034 } else
1035 {
1036 jtag_add_reset(0, 1);
1037 }
1038
1039 target->state = TARGET_RESET;
1040 jtag_add_sleep(50000);
1041
1042 armv4_5_invalidate_core_regs(target);
1043
1044 if ((target->reset_halt) && ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0))
1045 {
1046 /* debug entry was already prepared in arm7_9_assert_reset() */
1047 target->debug_reason = DBG_REASON_DBGRQ;
1048 }
1049
1050 return ERROR_OK;
1051 }
1052
1053 /**
1054 * Deassert the reset (SRST) signal on an ARM7/9 target. If SRST pulls TRST
1055 * and the target is being reset into a halt, a warning will be triggered
1056 * because it is not possible to reset into a halted mode in this case. The
1057 * target is halted using the target's functions.
1058 *
1059 * @param target Pointer to the target to have the reset deasserted
1060 * @return ERROR_OK or an error from polling or halting the target
1061 */
1062 int arm7_9_deassert_reset(target_t *target)
1063 {
1064 int retval = ERROR_OK;
1065 LOG_DEBUG("target->state: %s",
1066 target_state_name(target));
1067
1068 /* deassert reset lines */
1069 jtag_add_reset(0, 0);
1070
1071 enum reset_types jtag_reset_config = jtag_get_reset_config();
1072 if (target->reset_halt && (jtag_reset_config & RESET_SRST_PULLS_TRST) != 0)
1073 {
1074 LOG_WARNING("srst pulls trst - can not reset into halted mode. Issuing halt after reset.");
1075 /* set up embedded ice registers again */
1076 if ((retval = target_examine_one(target)) != ERROR_OK)
1077 return retval;
1078
1079 if ((retval = target_poll(target)) != ERROR_OK)
1080 {
1081 return retval;
1082 }
1083
1084 if ((retval = target_halt(target)) != ERROR_OK)
1085 {
1086 return retval;
1087 }
1088
1089 }
1090 return retval;
1091 }
1092
1093 /**
1094 * Clears the halt condition for an ARM7/9 target. If it isn't coming out of
1095 * reset and if DBGRQ is used, it is progammed to be deasserted. If the reset
1096 * vector catch was used, it is restored. Otherwise, the control value is
1097 * restored and the watchpoint unit is restored if it was in use.
1098 *
1099 * @param target Pointer to the ARM7/9 target to have halt cleared
1100 * @return Always ERROR_OK
1101 */
1102 int arm7_9_clear_halt(target_t *target)
1103 {
1104 armv4_5_common_t *armv4_5 = target->arch_info;
1105 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1106 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1107
1108 /* we used DBGRQ only if we didn't come out of reset */
1109 if (!arm7_9->debug_entry_from_reset && arm7_9->use_dbgrq)
1110 {
1111 /* program EmbeddedICE Debug Control Register to deassert DBGRQ
1112 */
1113 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1114 embeddedice_store_reg(dbg_ctrl);
1115 }
1116 else
1117 {
1118 if (arm7_9->debug_entry_from_reset && arm7_9->has_vector_catch)
1119 {
1120 /* if we came out of reset, and vector catch is supported, we used
1121 * vector catch to enter debug state
1122 * restore the register in that case
1123 */
1124 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH]);
1125 }
1126 else
1127 {
1128 /* restore registers if watchpoint unit 0 was in use
1129 */
1130 if (arm7_9->wp0_used)
1131 {
1132 if (arm7_9->debug_entry_from_reset)
1133 {
1134 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE]);
1135 }
1136 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
1137 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
1138 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
1139 }
1140 /* control value always has to be restored, as it was either disabled,
1141 * or enabled with possibly different bits
1142 */
1143 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
1144 }
1145 }
1146
1147 return ERROR_OK;
1148 }
1149
1150 /**
1151 * Issue a software reset and halt to an ARM7/9 target. The target is halted
1152 * and then there is a wait until the processor shows the halt. This wait can
1153 * timeout and results in an error being returned. The software reset involves
1154 * clearing the halt, updating the debug control register, changing to ARM mode,
1155 * reset of the program counter, and reset of all of the registers.
1156 *
1157 * @param target Pointer to the ARM7/9 target to be reset and halted by software
1158 * @return Error status if any of the commands fail, otherwise ERROR_OK
1159 */
1160 int arm7_9_soft_reset_halt(struct target_s *target)
1161 {
1162 armv4_5_common_t *armv4_5 = target->arch_info;
1163 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1164 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
1165 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1166 int i;
1167 int retval;
1168
1169 if ((retval = target_halt(target)) != ERROR_OK)
1170 return retval;
1171
1172 long long then = timeval_ms();
1173 int timeout;
1174 while (!(timeout = ((timeval_ms()-then) > 1000)))
1175 {
1176 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) != 0)
1177 break;
1178 embeddedice_read_reg(dbg_stat);
1179 if ((retval = jtag_execute_queue()) != ERROR_OK)
1180 return retval;
1181 if (debug_level >= 3)
1182 {
1183 alive_sleep(100);
1184 } else
1185 {
1186 keep_alive();
1187 }
1188 }
1189 if (timeout)
1190 {
1191 LOG_ERROR("Failed to halt CPU after 1 sec");
1192 return ERROR_TARGET_TIMEOUT;
1193 }
1194 target->state = TARGET_HALTED;
1195
1196 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1197 * ensure that DBGRQ is cleared
1198 */
1199 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
1200 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1201 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
1202 embeddedice_store_reg(dbg_ctrl);
1203
1204 if ((retval = arm7_9_clear_halt(target)) != ERROR_OK)
1205 {
1206 return retval;
1207 }
1208
1209 /* if the target is in Thumb state, change to ARM state */
1210 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
1211 {
1212 uint32_t r0_thumb, pc_thumb;
1213 LOG_DEBUG("target entered debug from Thumb state, changing to ARM");
1214 /* Entered debug from Thumb mode */
1215 armv4_5->core_state = ARMV4_5_STATE_THUMB;
1216 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
1217 }
1218
1219 /* all register content is now invalid */
1220 if ((retval = armv4_5_invalidate_core_regs(target)) != ERROR_OK)
1221 {
1222 return retval;
1223 }
1224
1225 /* SVC, ARM state, IRQ and FIQ disabled */
1226 buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
1227 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
1228 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1229
1230 /* start fetching from 0x0 */
1231 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
1232 armv4_5->core_cache->reg_list[15].dirty = 1;
1233 armv4_5->core_cache->reg_list[15].valid = 1;
1234
1235 armv4_5->core_mode = ARMV4_5_MODE_SVC;
1236 armv4_5->core_state = ARMV4_5_STATE_ARM;
1237
1238 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1239 return ERROR_FAIL;
1240
1241 /* reset registers */
1242 for (i = 0; i <= 14; i++)
1243 {
1244 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, 0xffffffff);
1245 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 1;
1246 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
1247 }
1248
1249 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
1250 {
1251 return retval;
1252 }
1253
1254 return ERROR_OK;
1255 }
1256
1257 /**
1258 * Halt an ARM7/9 target. This is accomplished by either asserting the DBGRQ
1259 * line or by programming a watchpoint to trigger on any address. It is
1260 * considered a bug to call this function while the target is in the
1261 * TARGET_RESET state.
1262 *
1263 * @param target Pointer to the ARM7/9 target to be halted
1264 * @return Always ERROR_OK
1265 */
1266 int arm7_9_halt(target_t *target)
1267 {
1268 if (target->state == TARGET_RESET)
1269 {
1270 LOG_ERROR("BUG: arm7/9 does not support halt during reset. This is handled in arm7_9_assert_reset()");
1271 return ERROR_OK;
1272 }
1273
1274 armv4_5_common_t *armv4_5 = target->arch_info;
1275 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1276 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1277
1278 LOG_DEBUG("target->state: %s",
1279 target_state_name(target));
1280
1281 if (target->state == TARGET_HALTED)
1282 {
1283 LOG_DEBUG("target was already halted");
1284 return ERROR_OK;
1285 }
1286
1287 if (target->state == TARGET_UNKNOWN)
1288 {
1289 LOG_WARNING("target was in unknown state when halt was requested");
1290 }
1291
1292 if (arm7_9->use_dbgrq)
1293 {
1294 /* program EmbeddedICE Debug Control Register to assert DBGRQ
1295 */
1296 if (arm7_9->set_special_dbgrq) {
1297 arm7_9->set_special_dbgrq(target);
1298 } else {
1299 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 1);
1300 embeddedice_store_reg(dbg_ctrl);
1301 }
1302 }
1303 else
1304 {
1305 /* program watchpoint unit to match on any address
1306 */
1307 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1308 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1309 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
1310 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
1311 }
1312
1313 target->debug_reason = DBG_REASON_DBGRQ;
1314
1315 return ERROR_OK;
1316 }
1317
1318 /**
1319 * Handle an ARM7/9 target's entry into debug mode. The halt is cleared on the
1320 * ARM. The JTAG queue is then executed and the reason for debug entry is
1321 * examined. Once done, the target is verified to be halted and the processor
1322 * is forced into ARM mode. The core registers are saved for the current core
1323 * mode and the program counter (register 15) is updated as needed. The core
1324 * registers and CPSR and SPSR are saved for restoration later.
1325 *
1326 * @param target Pointer to target that is entering debug mode
1327 * @return Error code if anything fails, otherwise ERROR_OK
1328 */
1329 int arm7_9_debug_entry(target_t *target)
1330 {
1331 int i;
1332 uint32_t context[16];
1333 uint32_t* context_p[16];
1334 uint32_t r0_thumb, pc_thumb;
1335 uint32_t cpsr;
1336 int retval;
1337 /* get pointers to arch-specific information */
1338 armv4_5_common_t *armv4_5 = target->arch_info;
1339 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1340 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
1341 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1342
1343 #ifdef _DEBUG_ARM7_9_
1344 LOG_DEBUG("-");
1345 #endif
1346
1347 if (arm7_9->pre_debug_entry)
1348 arm7_9->pre_debug_entry(target);
1349
1350 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1351 * ensure that DBGRQ is cleared
1352 */
1353 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
1354 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1355 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
1356 embeddedice_store_reg(dbg_ctrl);
1357
1358 if ((retval = arm7_9_clear_halt(target)) != ERROR_OK)
1359 {
1360 return retval;
1361 }
1362
1363 if ((retval = jtag_execute_queue()) != ERROR_OK)
1364 {
1365 return retval;
1366 }
1367
1368 if ((retval = arm7_9->examine_debug_reason(target)) != ERROR_OK)
1369 return retval;
1370
1371
1372 if (target->state != TARGET_HALTED)
1373 {
1374 LOG_WARNING("target not halted");
1375 return ERROR_TARGET_NOT_HALTED;
1376 }
1377
1378 /* if the target is in Thumb state, change to ARM state */
1379 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
1380 {
1381 LOG_DEBUG("target entered debug from Thumb state");
1382 /* Entered debug from Thumb mode */
1383 armv4_5->core_state = ARMV4_5_STATE_THUMB;
1384 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
1385 LOG_DEBUG("r0_thumb: 0x%8.8" PRIx32 ", pc_thumb: 0x%8.8" PRIx32 "", r0_thumb, pc_thumb);
1386 }
1387 else
1388 {
1389 LOG_DEBUG("target entered debug from ARM state");
1390 /* Entered debug from ARM mode */
1391 armv4_5->core_state = ARMV4_5_STATE_ARM;
1392 }
1393
1394 for (i = 0; i < 16; i++)
1395 context_p[i] = &context[i];
1396 /* save core registers (r0 - r15 of current core mode) */
1397 arm7_9->read_core_regs(target, 0xffff, context_p);
1398
1399 arm7_9->read_xpsr(target, &cpsr, 0);
1400
1401 if ((retval = jtag_execute_queue()) != ERROR_OK)
1402 return retval;
1403
1404 /* if the core has been executing in Thumb state, set the T bit */
1405 if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1406 cpsr |= 0x20;
1407
1408 buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
1409 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
1410 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1411
1412 armv4_5->core_mode = cpsr & 0x1f;
1413
1414 if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
1415 {
1416 target->state = TARGET_UNKNOWN;
1417 LOG_ERROR("cpsr contains invalid mode value - communication failure");
1418 return ERROR_TARGET_FAILURE;
1419 }
1420
1421 LOG_DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
1422
1423 if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1424 {
1425 LOG_DEBUG("thumb state, applying fixups");
1426 context[0] = r0_thumb;
1427 context[15] = pc_thumb;
1428 } else if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1429 {
1430 /* adjust value stored by STM */
1431 context[15] -= 3 * 4;
1432 }
1433
1434 if ((target->debug_reason == DBG_REASON_BREAKPOINT)
1435 || (target->debug_reason == DBG_REASON_SINGLESTEP)
1436 || (target->debug_reason == DBG_REASON_WATCHPOINT)
1437 || (target->debug_reason == DBG_REASON_WPTANDBKPT)
1438 || ((target->debug_reason == DBG_REASON_DBGRQ) && (arm7_9->use_dbgrq == 0)))
1439 context[15] -= 3 * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
1440 else if (target->debug_reason == DBG_REASON_DBGRQ)
1441 context[15] -= arm7_9->dbgreq_adjust_pc * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
1442 else
1443 {
1444 LOG_ERROR("unknown debug reason: %i", target->debug_reason);
1445 }
1446
1447 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1448 return ERROR_FAIL;
1449
1450 for (i = 0; i <= 15; i++)
1451 {
1452 LOG_DEBUG("r%i: 0x%8.8" PRIx32 "", i, context[i]);
1453 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, context[i]);
1454 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
1455 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
1456 }
1457
1458 LOG_DEBUG("entered debug state at PC 0x%" PRIx32 "", context[15]);
1459
1460 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1461 return ERROR_FAIL;
1462
1463 /* exceptions other than USR & SYS have a saved program status register */
1464 if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
1465 {
1466 uint32_t spsr;
1467 arm7_9->read_xpsr(target, &spsr, 1);
1468 if ((retval = jtag_execute_queue()) != ERROR_OK)
1469 {
1470 return retval;
1471 }
1472 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, spsr);
1473 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
1474 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
1475 }
1476
1477 /* r0 and r15 (pc) have to be restored later */
1478 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).valid;
1479 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).valid;
1480
1481 if ((retval = jtag_execute_queue()) != ERROR_OK)
1482 return retval;
1483
1484 if (arm7_9->post_debug_entry)
1485 arm7_9->post_debug_entry(target);
1486
1487 return ERROR_OK;
1488 }
1489
1490 /**
1491 * Validate the full context for an ARM7/9 target in all processor modes. If
1492 * there are any invalid registers for the target, they will all be read. This
1493 * includes the PSR.
1494 *
1495 * @param target Pointer to the ARM7/9 target to capture the full context from
1496 * @return Error if the target is not halted, has an invalid core mode, or if
1497 * the JTAG queue fails to execute
1498 */
1499 int arm7_9_full_context(target_t *target)
1500 {
1501 int i;
1502 int retval;
1503 armv4_5_common_t *armv4_5 = target->arch_info;
1504 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1505
1506 LOG_DEBUG("-");
1507
1508 if (target->state != TARGET_HALTED)
1509 {
1510 LOG_WARNING("target not halted");
1511 return ERROR_TARGET_NOT_HALTED;
1512 }
1513
1514 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1515 return ERROR_FAIL;
1516
1517 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1518 * SYS shares registers with User, so we don't touch SYS
1519 */
1520 for (i = 0; i < 6; i++)
1521 {
1522 uint32_t mask = 0;
1523 uint32_t* reg_p[16];
1524 int j;
1525 int valid = 1;
1526
1527 /* check if there are invalid registers in the current mode
1528 */
1529 for (j = 0; j <= 16; j++)
1530 {
1531 if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1532 valid = 0;
1533 }
1534
1535 if (!valid)
1536 {
1537 uint32_t tmp_cpsr;
1538
1539 /* change processor mode (and mask T bit) */
1540 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1541 tmp_cpsr |= armv4_5_number_to_mode(i);
1542 tmp_cpsr &= ~0x20;
1543 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1544
1545 for (j = 0; j < 15; j++)
1546 {
1547 if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1548 {
1549 reg_p[j] = (uint32_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value;
1550 mask |= 1 << j;
1551 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
1552 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1553 }
1554 }
1555
1556 /* if only the PSR is invalid, mask is all zeroes */
1557 if (mask)
1558 arm7_9->read_core_regs(target, mask, reg_p);
1559
1560 /* check if the PSR has to be read */
1561 if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid == 0)
1562 {
1563 arm7_9->read_xpsr(target, (uint32_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).value, 1);
1564 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
1565 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1566 }
1567 }
1568 }
1569
1570 /* restore processor mode (mask T bit) */
1571 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
1572
1573 if ((retval = jtag_execute_queue()) != ERROR_OK)
1574 {
1575 return retval;
1576 }
1577 return ERROR_OK;
1578 }
1579
1580 /**
1581 * Restore the processor context on an ARM7/9 target. The full processor
1582 * context is analyzed to see if any of the registers are dirty on this end, but
1583 * have a valid new value. If this is the case, the processor is changed to the
1584 * appropriate mode and the new register values are written out to the
1585 * processor. If there happens to be a dirty register with an invalid value, an
1586 * error will be logged.
1587 *
1588 * @param target Pointer to the ARM7/9 target to have its context restored
1589 * @return Error status if the target is not halted or the core mode in the
1590 * armv4_5 struct is invalid.
1591 */
1592 int arm7_9_restore_context(target_t *target)
1593 {
1594 armv4_5_common_t *armv4_5 = target->arch_info;
1595 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1596 reg_t *reg;
1597 armv4_5_core_reg_t *reg_arch_info;
1598 enum armv4_5_mode current_mode = armv4_5->core_mode;
1599 int i, j;
1600 int dirty;
1601 int mode_change;
1602
1603 LOG_DEBUG("-");
1604
1605 if (target->state != TARGET_HALTED)
1606 {
1607 LOG_WARNING("target not halted");
1608 return ERROR_TARGET_NOT_HALTED;
1609 }
1610
1611 if (arm7_9->pre_restore_context)
1612 arm7_9->pre_restore_context(target);
1613
1614 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1615 return ERROR_FAIL;
1616
1617 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1618 * SYS shares registers with User, so we don't touch SYS
1619 */
1620 for (i = 0; i < 6; i++)
1621 {
1622 LOG_DEBUG("examining %s mode", armv4_5_mode_strings[i]);
1623 dirty = 0;
1624 mode_change = 0;
1625 /* check if there are dirty registers in the current mode
1626 */
1627 for (j = 0; j <= 16; j++)
1628 {
1629 reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
1630 reg_arch_info = reg->arch_info;
1631 if (reg->dirty == 1)
1632 {
1633 if (reg->valid == 1)
1634 {
1635 dirty = 1;
1636 LOG_DEBUG("examining dirty reg: %s", reg->name);
1637 if ((reg_arch_info->mode != ARMV4_5_MODE_ANY)
1638 && (reg_arch_info->mode != current_mode)
1639 && !((reg_arch_info->mode == ARMV4_5_MODE_USR) && (armv4_5->core_mode == ARMV4_5_MODE_SYS))
1640 && !((reg_arch_info->mode == ARMV4_5_MODE_SYS) && (armv4_5->core_mode == ARMV4_5_MODE_USR)))
1641 {
1642 mode_change = 1;
1643 LOG_DEBUG("require mode change");
1644 }
1645 }
1646 else
1647 {
1648 LOG_ERROR("BUG: dirty register '%s', but no valid data", reg->name);
1649 }
1650 }
1651 }
1652
1653 if (dirty)
1654 {
1655 uint32_t mask = 0x0;
1656 int num_regs = 0;
1657 uint32_t regs[16];
1658
1659 if (mode_change)
1660 {
1661 uint32_t tmp_cpsr;
1662
1663 /* change processor mode (mask T bit) */
1664 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1665 tmp_cpsr |= armv4_5_number_to_mode(i);
1666 tmp_cpsr &= ~0x20;
1667 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1668 current_mode = armv4_5_number_to_mode(i);
1669 }
1670
1671 for (j = 0; j <= 14; j++)
1672 {
1673 reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
1674 reg_arch_info = reg->arch_info;
1675
1676
1677 if (reg->dirty == 1)
1678 {
1679 regs[j] = buf_get_u32(reg->value, 0, 32);
1680 mask |= 1 << j;
1681 num_regs++;
1682 reg->dirty = 0;
1683 reg->valid = 1;
1684 LOG_DEBUG("writing register %i of mode %s with value 0x%8.8" PRIx32 "", j, armv4_5_mode_strings[i], regs[j]);
1685 }
1686 }
1687
1688 if (mask)
1689 {
1690 arm7_9->write_core_regs(target, mask, regs);
1691 }
1692
1693 reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16);
1694 reg_arch_info = reg->arch_info;
1695 if ((reg->dirty) && (reg_arch_info->mode != ARMV4_5_MODE_ANY))
1696 {
1697 LOG_DEBUG("writing SPSR of mode %i with value 0x%8.8" PRIx32 "", i, buf_get_u32(reg->value, 0, 32));
1698 arm7_9->write_xpsr(target, buf_get_u32(reg->value, 0, 32), 1);
1699 }
1700 }
1701 }
1702
1703 if ((armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 0) && (armv4_5->core_mode != current_mode))
1704 {
1705 /* restore processor mode (mask T bit) */
1706 uint32_t tmp_cpsr;
1707
1708 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1709 tmp_cpsr |= armv4_5_number_to_mode(i);
1710 tmp_cpsr &= ~0x20;
1711 LOG_DEBUG("writing lower 8 bit of cpsr with value 0x%2.2x", (unsigned)(tmp_cpsr));
1712 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1713 }
1714 else if (armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 1)
1715 {
1716 /* CPSR has been changed, full restore necessary (mask T bit) */
1717 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1718 arm7_9->write_xpsr(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32) & ~0x20, 0);
1719 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
1720 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1721 }
1722
1723 /* restore PC */
1724 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1725 arm7_9->write_pc(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1726 armv4_5->core_cache->reg_list[15].dirty = 0;
1727
1728 if (arm7_9->post_restore_context)
1729 arm7_9->post_restore_context(target);
1730
1731 return ERROR_OK;
1732 }
1733
1734 /**
1735 * Restart the core of an ARM7/9 target. A RESTART command is sent to the
1736 * instruction register and the JTAG state is set to TAP_IDLE causing a core
1737 * restart.
1738 *
1739 * @param target Pointer to the ARM7/9 target to be restarted
1740 * @return Result of executing the JTAG queue
1741 */
1742 int arm7_9_restart_core(struct target_s *target)
1743 {
1744 armv4_5_common_t *armv4_5 = target->arch_info;
1745 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1746 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
1747
1748 /* set RESTART instruction */
1749 jtag_set_end_state(TAP_IDLE);
1750 if (arm7_9->need_bypass_before_restart) {
1751 arm7_9->need_bypass_before_restart = 0;
1752 arm_jtag_set_instr(jtag_info, 0xf, NULL);
1753 }
1754 arm_jtag_set_instr(jtag_info, 0x4, NULL);
1755
1756 jtag_add_runtest(1, jtag_set_end_state(TAP_IDLE));
1757 return jtag_execute_queue();
1758 }
1759
1760 /**
1761 * Enable the watchpoints on an ARM7/9 target. The target's watchpoints are
1762 * iterated through and are set on the target if they aren't already set.
1763 *
1764 * @param target Pointer to the ARM7/9 target to enable watchpoints on
1765 */
1766 void arm7_9_enable_watchpoints(struct target_s *target)
1767 {
1768 watchpoint_t *watchpoint = target->watchpoints;
1769
1770 while (watchpoint)
1771 {
1772 if (watchpoint->set == 0)
1773 arm7_9_set_watchpoint(target, watchpoint);
1774 watchpoint = watchpoint->next;
1775 }
1776 }
1777
1778 /**
1779 * Enable the breakpoints on an ARM7/9 target. The target's breakpoints are
1780 * iterated through and are set on the target.
1781 *
1782 * @param target Pointer to the ARM7/9 target to enable breakpoints on
1783 */
1784 void arm7_9_enable_breakpoints(struct target_s *target)
1785 {
1786 breakpoint_t *breakpoint = target->breakpoints;
1787
1788 /* set any pending breakpoints */
1789 while (breakpoint)
1790 {
1791 arm7_9_set_breakpoint(target, breakpoint);
1792 breakpoint = breakpoint->next;
1793 }
1794 }
1795
1796 int arm7_9_resume(struct target_s *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
1797 {
1798 armv4_5_common_t *armv4_5 = target->arch_info;
1799 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1800 breakpoint_t *breakpoint = target->breakpoints;
1801 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1802 int err, retval = ERROR_OK;
1803
1804 LOG_DEBUG("-");
1805
1806 if (target->state != TARGET_HALTED)
1807 {
1808 LOG_WARNING("target not halted");
1809 return ERROR_TARGET_NOT_HALTED;
1810 }
1811
1812 if (!debug_execution)
1813 {
1814 target_free_all_working_areas(target);
1815 }
1816
1817 /* current = 1: continue on current pc, otherwise continue at <address> */
1818 if (!current)
1819 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1820
1821 uint32_t current_pc;
1822 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1823
1824 /* the front-end may request us not to handle breakpoints */
1825 if (handle_breakpoints)
1826 {
1827 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1828 {
1829 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (id: %d)", breakpoint->address, breakpoint->unique_id );
1830 if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
1831 {
1832 return retval;
1833 }
1834
1835 /* calculate PC of next instruction */
1836 uint32_t next_pc;
1837 if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
1838 {
1839 uint32_t current_opcode;
1840 target_read_u32(target, current_pc, &current_opcode);
1841 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "", current_opcode);
1842 return retval;
1843 }
1844
1845 LOG_DEBUG("enable single-step");
1846 arm7_9->enable_single_step(target, next_pc);
1847
1848 target->debug_reason = DBG_REASON_SINGLESTEP;
1849
1850 if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
1851 {
1852 return retval;
1853 }
1854
1855 if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1856 arm7_9->branch_resume(target);
1857 else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1858 {
1859 arm7_9->branch_resume_thumb(target);
1860 }
1861 else
1862 {
1863 LOG_ERROR("unhandled core state");
1864 return ERROR_FAIL;
1865 }
1866
1867 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1868 embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1869 err = arm7_9_execute_sys_speed(target);
1870
1871 LOG_DEBUG("disable single-step");
1872 arm7_9->disable_single_step(target);
1873
1874 if (err != ERROR_OK)
1875 {
1876 if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
1877 {
1878 return retval;
1879 }
1880 target->state = TARGET_UNKNOWN;
1881 return err;
1882 }
1883
1884 arm7_9_debug_entry(target);
1885 LOG_DEBUG("new PC after step: 0x%8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1886
1887 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
1888 if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
1889 {
1890 return retval;
1891 }
1892 }
1893 }
1894
1895 /* enable any pending breakpoints and watchpoints */
1896 arm7_9_enable_breakpoints(target);
1897 arm7_9_enable_watchpoints(target);
1898
1899 if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
1900 {
1901 return retval;
1902 }
1903
1904 if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1905 {
1906 arm7_9->branch_resume(target);
1907 }
1908 else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1909 {
1910 arm7_9->branch_resume_thumb(target);
1911 }
1912 else
1913 {
1914 LOG_ERROR("unhandled core state");
1915 return ERROR_FAIL;
1916 }
1917
1918 /* deassert DBGACK and INTDIS */
1919 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1920 /* INTDIS only when we really resume, not during debug execution */
1921 if (!debug_execution)
1922 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 0);
1923 embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1924
1925 if ((retval = arm7_9_restart_core(target)) != ERROR_OK)
1926 {
1927 return retval;
1928 }
1929
1930 target->debug_reason = DBG_REASON_NOTHALTED;
1931
1932 if (!debug_execution)
1933 {
1934 /* registers are now invalid */
1935 armv4_5_invalidate_core_regs(target);
1936 target->state = TARGET_RUNNING;
1937 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED)) != ERROR_OK)
1938 {
1939 return retval;
1940 }
1941 }
1942 else
1943 {
1944 target->state = TARGET_DEBUG_RUNNING;
1945 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED)) != ERROR_OK)
1946 {
1947 return retval;
1948 }
1949 }
1950
1951 LOG_DEBUG("target resumed");
1952
1953 return ERROR_OK;
1954 }
1955
1956 void arm7_9_enable_eice_step(target_t *target, uint32_t next_pc)
1957 {
1958 armv4_5_common_t *armv4_5 = target->arch_info;
1959 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1960
1961 uint32_t current_pc;
1962 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1963
1964 if (next_pc != current_pc)
1965 {
1966 /* setup an inverse breakpoint on the current PC
1967 * - comparator 1 matches the current address
1968 * - rangeout from comparator 1 is connected to comparator 0 rangein
1969 * - comparator 0 matches any address, as long as rangein is low */
1970 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1971 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1972 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
1973 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~(EICE_W_CTRL_RANGE | EICE_W_CTRL_nOPC) & 0xff);
1974 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], current_pc);
1975 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
1976 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
1977 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
1978 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
1979 }
1980 else
1981 {
1982 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1983 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1984 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
1985 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff);
1986 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], next_pc);
1987 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
1988 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
1989 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
1990 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
1991 }
1992 }
1993
1994 void arm7_9_disable_eice_step(target_t *target)
1995 {
1996 armv4_5_common_t *armv4_5 = target->arch_info;
1997 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1998
1999 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
2000 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
2001 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
2002 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
2003 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE]);
2004 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK]);
2005 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK]);
2006 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK]);
2007 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE]);
2008 }
2009
2010 int arm7_9_step(struct target_s *target, int current, uint32_t address, int handle_breakpoints)
2011 {
2012 armv4_5_common_t *armv4_5 = target->arch_info;
2013 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2014 breakpoint_t *breakpoint = NULL;
2015 int err, retval;
2016
2017 if (target->state != TARGET_HALTED)
2018 {
2019 LOG_WARNING("target not halted");
2020 return ERROR_TARGET_NOT_HALTED;
2021 }
2022
2023 /* current = 1: continue on current pc, otherwise continue at <address> */
2024 if (!current)
2025 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
2026
2027 uint32_t current_pc;
2028 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
2029
2030 /* the front-end may request us not to handle breakpoints */
2031 if (handle_breakpoints)
2032 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
2033 if ((retval = arm7_9_unset_breakpoint(target, breakpoint)) != ERROR_OK)
2034 {
2035 return retval;
2036 }
2037
2038 target->debug_reason = DBG_REASON_SINGLESTEP;
2039
2040 /* calculate PC of next instruction */
2041 uint32_t next_pc;
2042 if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
2043 {
2044 uint32_t current_opcode;
2045 target_read_u32(target, current_pc, &current_opcode);
2046 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "", current_opcode);
2047 return retval;
2048 }
2049
2050 if ((retval = arm7_9_restore_context(target)) != ERROR_OK)
2051 {
2052 return retval;
2053 }
2054
2055 arm7_9->enable_single_step(target, next_pc);
2056
2057 if (armv4_5->core_state == ARMV4_5_STATE_ARM)
2058 {
2059 arm7_9->branch_resume(target);
2060 }
2061 else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
2062 {
2063 arm7_9->branch_resume_thumb(target);
2064 }
2065 else
2066 {
2067 LOG_ERROR("unhandled core state");
2068 return ERROR_FAIL;
2069 }
2070
2071 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED)) != ERROR_OK)
2072 {
2073 return retval;
2074 }
2075
2076 err = arm7_9_execute_sys_speed(target);
2077 arm7_9->disable_single_step(target);
2078
2079 /* registers are now invalid */
2080 armv4_5_invalidate_core_regs(target);
2081
2082 if (err != ERROR_OK)
2083 {
2084 target->state = TARGET_UNKNOWN;
2085 } else {
2086 arm7_9_debug_entry(target);
2087 if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
2088 {
2089 return retval;
2090 }
2091 LOG_DEBUG("target stepped");
2092 }
2093
2094 if (breakpoint)
2095 if ((retval = arm7_9_set_breakpoint(target, breakpoint)) != ERROR_OK)
2096 {
2097 return retval;
2098 }
2099
2100 return err;
2101 }
2102
2103 int arm7_9_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
2104 {
2105 uint32_t* reg_p[16];
2106 uint32_t value;
2107 int retval;
2108 armv4_5_common_t *armv4_5 = target->arch_info;
2109 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2110
2111 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
2112 return ERROR_FAIL;
2113
2114 enum armv4_5_mode reg_mode = ((armv4_5_core_reg_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
2115
2116 if ((num < 0) || (num > 16))
2117 return ERROR_INVALID_ARGUMENTS;
2118
2119 if ((mode != ARMV4_5_MODE_ANY)
2120 && (mode != armv4_5->core_mode)
2121 && (reg_mode != ARMV4_5_MODE_ANY))
2122 {
2123 uint32_t tmp_cpsr;
2124
2125 /* change processor mode (mask T bit) */
2126 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
2127 tmp_cpsr |= mode;
2128 tmp_cpsr &= ~0x20;
2129 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
2130 }
2131
2132 if ((num >= 0) && (num <= 15))
2133 {
2134 /* read a normal core register */
2135 reg_p[num] = &value;
2136
2137 arm7_9->read_core_regs(target, 1 << num, reg_p);
2138 }
2139 else
2140 {
2141 /* read a program status register
2142 * if the register mode is MODE_ANY, we read the cpsr, otherwise a spsr
2143 */
2144 armv4_5_core_reg_t *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
2145 int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
2146
2147 arm7_9->read_xpsr(target, &value, spsr);
2148 }
2149
2150 if ((retval = jtag_execute_queue()) != ERROR_OK)
2151 {
2152 return retval;
2153 }
2154
2155 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
2156 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
2157 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).value, 0, 32, value);
2158
2159 if ((mode != ARMV4_5_MODE_ANY)
2160 && (mode != armv4_5->core_mode)
2161 && (reg_mode != ARMV4_5_MODE_ANY)) {
2162 /* restore processor mode (mask T bit) */
2163 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
2164 }
2165
2166 return ERROR_OK;
2167 }
2168
2169 int arm7_9_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, uint32_t value)
2170 {
2171 uint32_t reg[16];
2172 armv4_5_common_t *armv4_5 = target->arch_info;
2173 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2174
2175 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
2176 return ERROR_FAIL;
2177
2178 enum armv4_5_mode reg_mode = ((armv4_5_core_reg_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
2179
2180 if ((num < 0) || (num > 16))
2181 return ERROR_INVALID_ARGUMENTS;
2182
2183 if ((mode != ARMV4_5_MODE_ANY)
2184 && (mode != armv4_5->core_mode)
2185 && (reg_mode != ARMV4_5_MODE_ANY)) {
2186 uint32_t tmp_cpsr;
2187
2188 /* change processor mode (mask T bit) */
2189 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
2190 tmp_cpsr |= mode;
2191 tmp_cpsr &= ~0x20;
2192 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
2193 }
2194
2195 if ((num >= 0) && (num <= 15))
2196 {
2197 /* write a normal core register */
2198 reg[num] = value;
2199
2200 arm7_9->write_core_regs(target, 1 << num, reg);
2201 }
2202 else
2203 {
2204 /* write a program status register
2205 * if the register mode is MODE_ANY, we write the cpsr, otherwise a spsr
2206 */
2207 armv4_5_core_reg_t *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
2208 int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
2209
2210 /* if we're writing the CPSR, mask the T bit */
2211 if (!spsr)
2212 value &= ~0x20;
2213
2214 arm7_9->write_xpsr(target, value, spsr);
2215 }
2216
2217 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
2218 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
2219
2220 if ((mode != ARMV4_5_MODE_ANY)
2221 && (mode != armv4_5->core_mode)
2222 && (reg_mode != ARMV4_5_MODE_ANY)) {
2223 /* restore processor mode (mask T bit) */
2224 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
2225 }
2226
2227 return jtag_execute_queue();
2228 }
2229
2230 int arm7_9_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
2231 {
2232 armv4_5_common_t *armv4_5 = target->arch_info;
2233 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2234
2235 uint32_t reg[16];
2236 uint32_t num_accesses = 0;
2237 int thisrun_accesses;
2238 int i;
2239 uint32_t cpsr;
2240 int retval;
2241 int last_reg = 0;
2242
2243 LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "", address, size, count);
2244
2245 if (target->state != TARGET_HALTED)
2246 {
2247 LOG_WARNING("target not halted");
2248 return ERROR_TARGET_NOT_HALTED;
2249 }
2250
2251 /* sanitize arguments */
2252 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
2253 return ERROR_INVALID_ARGUMENTS;
2254
2255 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
2256 return ERROR_TARGET_UNALIGNED_ACCESS;
2257
2258 /* load the base register with the address of the first word */
2259 reg[0] = address;
2260 arm7_9->write_core_regs(target, 0x1, reg);
2261
2262 int j = 0;
2263
2264 switch (size)
2265 {
2266 case 4:
2267 while (num_accesses < count)
2268 {
2269 uint32_t reg_list;
2270 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2271 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2272
2273 if (last_reg <= thisrun_accesses)
2274 last_reg = thisrun_accesses;
2275
2276 arm7_9->load_word_regs(target, reg_list);
2277
2278 /* fast memory reads are only safe when the target is running
2279 * from a sufficiently high clock (32 kHz is usually too slow)
2280 */
2281 if (arm7_9->fast_memory_access)
2282 retval = arm7_9_execute_fast_sys_speed(target);
2283 else
2284 retval = arm7_9_execute_sys_speed(target);
2285 if (retval != ERROR_OK)
2286 return retval;
2287
2288 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 4);
2289
2290 /* advance buffer, count number of accesses */
2291 buffer += thisrun_accesses * 4;
2292 num_accesses += thisrun_accesses;
2293
2294 if ((j++%1024) == 0)
2295 {
2296 keep_alive();
2297 }
2298 }
2299 break;
2300 case 2:
2301 while (num_accesses < count)
2302 {
2303 uint32_t reg_list;
2304 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2305 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2306
2307 for (i = 1; i <= thisrun_accesses; i++)
2308 {
2309 if (i > last_reg)
2310 last_reg = i;
2311 arm7_9->load_hword_reg(target, i);
2312 /* fast memory reads are only safe when the target is running
2313 * from a sufficiently high clock (32 kHz is usually too slow)
2314 */
2315 if (arm7_9->fast_memory_access)
2316 retval = arm7_9_execute_fast_sys_speed(target);
2317 else
2318 retval = arm7_9_execute_sys_speed(target);
2319 if (retval != ERROR_OK)
2320 {
2321 return retval;
2322 }
2323
2324 }
2325
2326 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 2);
2327
2328 /* advance buffer, count number of accesses */
2329 buffer += thisrun_accesses * 2;
2330 num_accesses += thisrun_accesses;
2331
2332 if ((j++%1024) == 0)
2333 {
2334 keep_alive();
2335 }
2336 }
2337 break;
2338 case 1:
2339 while (num_accesses < count)
2340 {
2341 uint32_t reg_list;
2342 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2343 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2344
2345 for (i = 1; i <= thisrun_accesses; i++)
2346 {
2347 if (i > last_reg)
2348 last_reg = i;
2349 arm7_9->load_byte_reg(target, i);
2350 /* fast memory reads are only safe when the target is running
2351 * from a sufficiently high clock (32 kHz is usually too slow)
2352 */
2353 if (arm7_9->fast_memory_access)
2354 retval = arm7_9_execute_fast_sys_speed(target);
2355 else
2356 retval = arm7_9_execute_sys_speed(target);
2357 if (retval != ERROR_OK)
2358 {
2359 return retval;
2360 }
2361 }
2362
2363 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 1);
2364
2365 /* advance buffer, count number of accesses */
2366 buffer += thisrun_accesses * 1;
2367 num_accesses += thisrun_accesses;
2368
2369 if ((j++%1024) == 0)
2370 {
2371 keep_alive();
2372 }
2373 }
2374 break;
2375 default:
2376 LOG_ERROR("BUG: we shouldn't get here");
2377 exit(-1);
2378 break;
2379 }
2380
2381 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
2382 return ERROR_FAIL;
2383
2384 for (i = 0; i <= last_reg; i++)
2385 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
2386
2387 arm7_9->read_xpsr(target, &cpsr, 0);
2388 if ((retval = jtag_execute_queue()) != ERROR_OK)
2389 {
2390 LOG_ERROR("JTAG error while reading cpsr");
2391 return ERROR_TARGET_DATA_ABORT;
2392 }
2393
2394 if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
2395 {
2396 LOG_WARNING("memory read caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")", address, size, count);
2397
2398 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
2399
2400 return ERROR_TARGET_DATA_ABORT;
2401 }
2402
2403 return ERROR_OK;
2404 }
2405
2406 int arm7_9_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
2407 {
2408 armv4_5_common_t *armv4_5 = target->arch_info;
2409 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2410 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
2411
2412 uint32_t reg[16];
2413 uint32_t num_accesses = 0;
2414 int thisrun_accesses;
2415 int i;
2416 uint32_t cpsr;
2417 int retval;
2418 int last_reg = 0;
2419
2420 #ifdef _DEBUG_ARM7_9_
2421 LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
2422 #endif
2423
2424 if (target->state != TARGET_HALTED)
2425 {
2426 LOG_WARNING("target not halted");
2427 return ERROR_TARGET_NOT_HALTED;
2428 }
2429
2430 /* sanitize arguments */
2431 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
2432 return ERROR_INVALID_ARGUMENTS;
2433
2434 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
2435 return ERROR_TARGET_UNALIGNED_ACCESS;
2436
2437 /* load the base register with the address of the first word */
2438 reg[0] = address;
2439 arm7_9->write_core_regs(target, 0x1, reg);
2440
2441 /* Clear DBGACK, to make sure memory fetches work as expected */
2442 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
2443 embeddedice_store_reg(dbg_ctrl);
2444
2445 switch (size)
2446 {
2447 case 4:
2448 while (num_accesses < count)
2449 {
2450 uint32_t reg_list;
2451 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2452 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2453
2454 for (i = 1; i <= thisrun_accesses; i++)
2455 {
2456 if (i > last_reg)
2457 last_reg = i;
2458 reg[i] = target_buffer_get_u32(target, buffer);
2459 buffer += 4;
2460 }
2461
2462 arm7_9->write_core_regs(target, reg_list, reg);
2463
2464 arm7_9->store_word_regs(target, reg_list);
2465
2466 /* fast memory writes are only safe when the target is running
2467 * from a sufficiently high clock (32 kHz is usually too slow)
2468 */
2469 if (arm7_9->fast_memory_access)
2470 retval = arm7_9_execute_fast_sys_speed(target);
2471 else
2472 retval = arm7_9_execute_sys_speed(target);
2473 if (retval != ERROR_OK)
2474 {
2475 return retval;
2476 }
2477
2478 num_accesses += thisrun_accesses;
2479 }
2480 break;
2481 case 2:
2482 while (num_accesses < count)
2483 {
2484 uint32_t reg_list;
2485 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2486 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2487
2488 for (i = 1; i <= thisrun_accesses; i++)
2489 {
2490 if (i > last_reg)
2491 last_reg = i;
2492 reg[i] = target_buffer_get_u16(target, buffer) & 0xffff;
2493 buffer += 2;
2494 }
2495
2496 arm7_9->write_core_regs(target, reg_list, reg);
2497
2498 for (i = 1; i <= thisrun_accesses; i++)
2499 {
2500 arm7_9->store_hword_reg(target, i);
2501
2502 /* fast memory writes are only safe when the target is running
2503 * from a sufficiently high clock (32 kHz is usually too slow)
2504 */
2505 if (arm7_9->fast_memory_access)
2506 retval = arm7_9_execute_fast_sys_speed(target);
2507 else
2508 retval = arm7_9_execute_sys_speed(target);
2509 if (retval != ERROR_OK)
2510 {
2511 return retval;
2512 }
2513 }
2514
2515 num_accesses += thisrun_accesses;
2516 }
2517 break;
2518 case 1:
2519 while (num_accesses < count)
2520 {
2521 uint32_t reg_list;
2522 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2523 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2524
2525 for (i = 1; i <= thisrun_accesses; i++)
2526 {
2527 if (i > last_reg)
2528 last_reg = i;
2529 reg[i] = *buffer++ & 0xff;
2530 }
2531
2532 arm7_9->write_core_regs(target, reg_list, reg);
2533
2534 for (i = 1; i <= thisrun_accesses; i++)
2535 {
2536 arm7_9->store_byte_reg(target, i);
2537 /* fast memory writes are only safe when the target is running
2538 * from a sufficiently high clock (32 kHz is usually too slow)
2539 */
2540 if (arm7_9->fast_memory_access)
2541 retval = arm7_9_execute_fast_sys_speed(target);
2542 else
2543 retval = arm7_9_execute_sys_speed(target);
2544 if (retval != ERROR_OK)
2545 {
2546 return retval;
2547 }
2548
2549 }
2550
2551 num_accesses += thisrun_accesses;
2552 }
2553 break;
2554 default:
2555 LOG_ERROR("BUG: we shouldn't get here");
2556 exit(-1);
2557 break;
2558 }
2559
2560 /* Re-Set DBGACK */
2561 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
2562 embeddedice_store_reg(dbg_ctrl);
2563
2564 if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
2565 return ERROR_FAIL;
2566
2567 for (i = 0; i <= last_reg; i++)
2568 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
2569
2570 arm7_9->read_xpsr(target, &cpsr, 0);
2571 if ((retval = jtag_execute_queue()) != ERROR_OK)
2572 {
2573 LOG_ERROR("JTAG error while reading cpsr");
2574 return ERROR_TARGET_DATA_ABORT;
2575 }
2576
2577 if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
2578 {
2579 LOG_WARNING("memory write caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")", address, size, count);
2580
2581 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
2582
2583 return ERROR_TARGET_DATA_ABORT;
2584 }
2585
2586 return ERROR_OK;
2587 }
2588
2589 static int dcc_count;
2590 static uint8_t *dcc_buffer;
2591
2592 static int arm7_9_dcc_completion(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info)
2593 {
2594 int retval = ERROR_OK;
2595 armv4_5_common_t *armv4_5 = target->arch_info;
2596 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2597
2598 if ((retval = target_wait_state(target, TARGET_DEBUG_RUNNING, 500)) != ERROR_OK)
2599 return retval;
2600
2601 int little = target->endianness == TARGET_LITTLE_ENDIAN;
2602 int count = dcc_count;
2603 uint8_t *buffer = dcc_buffer;
2604 if (count > 2)
2605 {
2606 /* Handle first & last using standard embeddedice_write_reg and the middle ones w/the
2607 * core function repeated. */
2608 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2609 buffer += 4;
2610
2611 embeddedice_reg_t *ice_reg = arm7_9->eice_cache->reg_list[EICE_COMMS_DATA].arch_info;
2612 uint8_t reg_addr = ice_reg->addr & 0x1f;
2613 jtag_tap_t *tap;
2614 tap = ice_reg->jtag_info->tap;
2615
2616 embeddedice_write_dcc(tap, reg_addr, buffer, little, count-2);
2617 buffer += (count-2)*4;
2618
2619 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2620 } else
2621 {
2622 int i;
2623 for (i = 0; i < count; i++)
2624 {
2625 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2626 buffer += 4;
2627 }
2628 }
2629
2630 if ((retval = target_halt(target))!= ERROR_OK)
2631 {
2632 return retval;
2633 }
2634 return target_wait_state(target, TARGET_HALTED, 500);
2635 }
2636
2637 static const uint32_t dcc_code[] =
2638 {
2639 /* MRC TST BNE MRC STR B */
2640 0xee101e10, 0xe3110001, 0x0afffffc, 0xee111e10, 0xe4801004, 0xeafffff9
2641 };
2642
2643 int armv4_5_run_algorithm_inner(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info, int (*run_it)(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info));
2644
2645 int arm7_9_bulk_write_memory(target_t *target, uint32_t address, uint32_t count, uint8_t *buffer)
2646 {
2647 int retval;
2648 armv4_5_common_t *armv4_5 = target->arch_info;
2649 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2650 int i;
2651
2652 if (!arm7_9->dcc_downloads)
2653 return target_write_memory(target, address, 4, count, buffer);
2654
2655 /* regrab previously allocated working_area, or allocate a new one */
2656 if (!arm7_9->dcc_working_area)
2657 {
2658 uint8_t dcc_code_buf[6 * 4];
2659
2660 /* make sure we have a working area */
2661 if (target_alloc_working_area(target, 24, &arm7_9->dcc_working_area) != ERROR_OK)
2662 {
2663 LOG_INFO("no working area available, falling back to memory writes");
2664 return target_write_memory(target, address, 4, count, buffer);
2665 }
2666
2667 /* copy target instructions to target endianness */
2668 for (i = 0; i < 6; i++)
2669 {
2670 target_buffer_set_u32(target, dcc_code_buf + i*4, dcc_code[i]);
2671 }
2672
2673 /* write DCC code to working area */
2674 if ((retval = target_write_memory(target, arm7_9->dcc_working_area->address, 4, 6, dcc_code_buf)) != ERROR_OK)
2675 {
2676 return retval;
2677 }
2678 }
2679
2680 armv4_5_algorithm_t armv4_5_info;
2681 reg_param_t reg_params[1];
2682
2683 armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
2684 armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
2685 armv4_5_info.core_state = ARMV4_5_STATE_ARM;
2686
2687 init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT);
2688
2689 buf_set_u32(reg_params[0].value, 0, 32, address);
2690
2691 dcc_count = count;
2692 dcc_buffer = buffer;
2693 retval = armv4_5_run_algorithm_inner(target, 0, NULL, 1, reg_params,
2694 arm7_9->dcc_working_area->address, arm7_9->dcc_working_area->address + 6*4, 20*1000, &armv4_5_info, arm7_9_dcc_completion);
2695
2696 if (retval == ERROR_OK)
2697 {
2698 uint32_t endaddress = buf_get_u32(reg_params[0].value, 0, 32);
2699 if (endaddress != (address + count*4))
2700 {
2701 LOG_ERROR("DCC write failed, expected end address 0x%08" PRIx32 " got 0x%0" PRIx32 "", (address + count*4), endaddress);
2702 retval = ERROR_FAIL;
2703 }
2704 }
2705
2706 destroy_reg_param(&reg_params[0]);
2707
2708 return retval;
2709 }
2710
2711 int arm7_9_checksum_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* checksum)
2712 {
2713 working_area_t *crc_algorithm;
2714 armv4_5_algorithm_t armv4_5_info;
2715 reg_param_t reg_params[2];
2716 int retval;
2717
2718 uint32_t arm7_9_crc_code[] = {
2719 0xE1A02000, /* mov r2, r0 */
2720 0xE3E00000, /* mov r0, #0xffffffff */
2721 0xE1A03001, /* mov r3, r1 */
2722 0xE3A04000, /* mov r4, #0 */
2723 0xEA00000B, /* b ncomp */
2724 /* nbyte: */
2725 0xE7D21004, /* ldrb r1, [r2, r4] */
2726 0xE59F7030, /* ldr r7, CRC32XOR */
2727 0xE0200C01, /* eor r0, r0, r1, asl 24 */
2728 0xE3A05000, /* mov r5, #0 */
2729 /* loop: */
2730 0xE3500000, /* cmp r0, #0 */
2731 0xE1A06080, /* mov r6, r0, asl #1 */
2732 0xE2855001, /* add r5, r5, #1 */
2733 0xE1A00006, /* mov r0, r6 */
2734 0xB0260007, /* eorlt r0, r6, r7 */
2735 0xE3550008, /* cmp r5, #8 */
2736 0x1AFFFFF8, /* bne loop */
2737 0xE2844001, /* add r4, r4, #1 */
2738 /* ncomp: */
2739 0xE1540003, /* cmp r4, r3 */
2740 0x1AFFFFF1, /* bne nbyte */
2741 /* end: */
2742 0xEAFFFFFE, /* b end */
2743 0x04C11DB7 /* CRC32XOR: .word 0x04C11DB7 */
2744 };
2745
2746 uint32_t i;
2747
2748 if (target_alloc_working_area(target, sizeof(arm7_9_crc_code), &crc_algorithm) != ERROR_OK)
2749 {
2750 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2751 }
2752
2753 /* convert flash writing code into a buffer in target endianness */
2754 for (i = 0; i < (sizeof(arm7_9_crc_code)/sizeof(uint32_t)); i++)
2755 {
2756 if ((retval = target_write_u32(target, crc_algorithm->address + i*sizeof(uint32_t), arm7_9_crc_code[i])) != ERROR_OK)
2757 {
2758 return retval;
2759 }
2760 }
2761
2762 armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
2763 armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
2764 armv4_5_info.core_state = ARMV4_5_STATE_ARM;
2765
2766 init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT);
2767 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
2768
2769 buf_set_u32(reg_params[0].value, 0, 32, address);
2770 buf_set_u32(reg_params[1].value, 0, 32, count);
2771
2772 if ((retval = target_run_algorithm(target, 0, NULL, 2, reg_params,
2773 crc_algorithm->address, crc_algorithm->address + (sizeof(arm7_9_crc_code) - 8), 20000, &armv4_5_info)) != ERROR_OK)
2774 {
2775 LOG_ERROR("error executing arm7_9 crc algorithm");
2776 destroy_reg_param(&reg_params[0]);
2777 destroy_reg_param(&reg_params[1]);
2778 target_free_working_area(target, crc_algorithm);
2779 return retval;
2780 }
2781
2782 *checksum = buf_get_u32(reg_params[0].value, 0, 32);
2783
2784 destroy_reg_param(&reg_params[0]);
2785 destroy_reg_param(&reg_params[1]);
2786
2787 target_free_working_area(target, crc_algorithm);
2788
2789 return ERROR_OK;
2790 }
2791
2792 int arm7_9_blank_check_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* blank)
2793 {
2794 working_area_t *erase_check_algorithm;
2795 reg_param_t reg_params[3];
2796 armv4_5_algorithm_t armv4_5_info;
2797 int retval;
2798 uint32_t i;
2799
2800 uint32_t erase_check_code[] =
2801 {
2802 /* loop: */
2803 0xe4d03001, /* ldrb r3, [r0], #1 */
2804 0xe0022003, /* and r2, r2, r3 */
2805 0xe2511001, /* subs r1, r1, #1 */
2806 0x1afffffb, /* bne loop */
2807 /* end: */
2808 0xeafffffe /* b end */
2809 };
2810
2811 /* make sure we have a working area */
2812 if (target_alloc_working_area(target, sizeof(erase_check_code), &erase_check_algorithm) != ERROR_OK)
2813 {
2814 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2815 }
2816
2817 /* convert flash writing code into a buffer in target endianness */
2818 for (i = 0; i < (sizeof(erase_check_code)/sizeof(uint32_t)); i++)
2819 if ((retval = target_write_u32(target, erase_check_algorithm->address + i*sizeof(uint32_t), erase_check_code[i])) != ERROR_OK)
2820 {
2821 return retval;
2822 }
2823
2824 armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
2825 armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
2826 armv4_5_info.core_state = ARMV4_5_STATE_ARM;
2827
2828 init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
2829 buf_set_u32(reg_params[0].value, 0, 32, address);
2830
2831 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
2832 buf_set_u32(reg_params[1].value, 0, 32, count);
2833
2834 init_reg_param(&reg_params[2], "r2", 32, PARAM_IN_OUT);
2835 buf_set_u32(reg_params[2].value, 0, 32, 0xff);
2836
2837 if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
2838 erase_check_algorithm->address, erase_check_algorithm->address + (sizeof(erase_check_code) - 4), 10000, &armv4_5_info)) != ERROR_OK)
2839 {
2840 destroy_reg_param(&reg_params[0]);
2841 destroy_reg_param(&reg_params[1]);
2842 destroy_reg_param(&reg_params[2]);
2843 target_free_working_area(target, erase_check_algorithm);
2844 return 0;
2845 }
2846
2847 *blank = buf_get_u32(reg_params[2].value, 0, 32);
2848
2849 destroy_reg_param(&reg_params[0]);
2850 destroy_reg_param(&reg_params[1]);
2851 destroy_reg_param(&reg_params[2]);
2852
2853 target_free_working_area(target, erase_check_algorithm);
2854
2855 return ERROR_OK;
2856 }
2857
2858 int arm7_9_register_commands(struct command_context_s *cmd_ctx)
2859 {
2860 command_t *arm7_9_cmd;
2861
2862 arm7_9_cmd = register_command(cmd_ctx, NULL, "arm7_9", NULL, COMMAND_ANY, "arm7/9 specific commands");
2863
2864 register_command(cmd_ctx, arm7_9_cmd, "write_xpsr", handle_arm7_9_write_xpsr_command, COMMAND_EXEC, "write program status register <value> <not cpsr | spsr>");
2865 register_command(cmd_ctx, arm7_9_cmd, "write_xpsr_im8", handle_arm7_9_write_xpsr_im8_command, COMMAND_EXEC, "write program status register <8bit immediate> <rotate> <not cpsr | spsr>");
2866
2867 register_command(cmd_ctx, arm7_9_cmd, "write_core_reg", handle_arm7_9_write_core_reg_command, COMMAND_EXEC, "write core register <num> <mode> <value>");
2868
2869 register_command(cmd_ctx, arm7_9_cmd, "dbgrq", handle_arm7_9_dbgrq_command,
2870 COMMAND_ANY, "use EmbeddedICE dbgrq instead of breakpoint for target halt requests <enable | disable>");
2871 register_command(cmd_ctx, arm7_9_cmd, "fast_memory_access", handle_arm7_9_fast_memory_access_command,
2872 COMMAND_ANY, "use fast memory accesses instead of slower but potentially safer accesses <enable | disable>");
2873 register_command(cmd_ctx, arm7_9_cmd, "dcc_downloads", handle_arm7_9_dcc_downloads_command,
2874 COMMAND_ANY, "use DCC downloads for larger memory writes <enable | disable>");
2875
2876 armv4_5_register_commands(cmd_ctx);
2877
2878 etm_register_commands(cmd_ctx);
2879
2880 return ERROR_OK;
2881 }
2882
2883 int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2884 {
2885 uint32_t value;
2886 int spsr;
2887 int retval;
2888 target_t *target = get_current_target(cmd_ctx);
2889 armv4_5_common_t *armv4_5;
2890 arm7_9_common_t *arm7_9;
2891
2892 if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2893 {
2894 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2895 return ERROR_OK;
2896 }
2897
2898 if (target->state != TARGET_HALTED)
2899 {
2900 command_print(cmd_ctx, "can't write registers while running");
2901 return ERROR_OK;
2902 }
2903
2904 if (argc < 2)
2905 {
2906 command_print(cmd_ctx, "usage: write_xpsr <value> <not cpsr | spsr>");
2907 return ERROR_OK;
2908 }
2909
2910 value = strtoul(args[0], NULL, 0);
2911 spsr = strtol(args[1], NULL, 0);
2912
2913 /* if we're writing the CPSR, mask the T bit */
2914 if (!spsr)
2915 value &= ~0x20;
2916
2917 arm7_9->write_xpsr(target, value, spsr);
2918 if ((retval = jtag_execute_queue()) != ERROR_OK)
2919 {
2920 LOG_ERROR("JTAG error while writing to xpsr");
2921 return retval;
2922 }
2923
2924 return ERROR_OK;
2925 }
2926
2927 int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2928 {
2929 uint32_t value;
2930 int rotate;
2931 int spsr;
2932 int retval;
2933 target_t *target = get_current_target(cmd_ctx);
2934 armv4_5_common_t *armv4_5;
2935 arm7_9_common_t *arm7_9;
2936
2937 if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2938 {
2939 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2940 return ERROR_OK;
2941 }
2942
2943 if (target->state != TARGET_HALTED)
2944 {
2945 command_print(cmd_ctx, "can't write registers while running");
2946 return ERROR_OK;
2947 }
2948
2949 if (argc < 3)
2950 {
2951 command_print(cmd_ctx, "usage: write_xpsr_im8 <im8> <rotate> <not cpsr | spsr>");
2952 return ERROR_OK;
2953 }
2954
2955 value = strtoul(args[0], NULL, 0);
2956 rotate = strtol(args[1], NULL, 0);
2957 spsr = strtol(args[2], NULL, 0);
2958
2959 arm7_9->write_xpsr_im8(target, value, rotate, spsr);
2960 if ((retval = jtag_execute_queue()) != ERROR_OK)
2961 {
2962 LOG_ERROR("JTAG error while writing 8-bit immediate to xpsr");
2963 return retval;
2964 }
2965
2966 return ERROR_OK;
2967 }
2968
2969 int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2970 {
2971 uint32_t value;
2972 uint32_t mode;
2973 int num;
2974 target_t *target = get_current_target(cmd_ctx);
2975 armv4_5_common_t *armv4_5;
2976 arm7_9_common_t *arm7_9;
2977
2978 if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2979 {
2980 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2981 return ERROR_OK;
2982 }
2983
2984 if (target->state != TARGET_HALTED)
2985 {
2986 command_print(cmd_ctx, "can't write registers while running");
2987 return ERROR_OK;
2988 }
2989
2990 if (argc < 3)
2991 {
2992 command_print(cmd_ctx, "usage: write_core_reg <num> <mode> <value>");
2993 return ERROR_OK;
2994 }
2995
2996 num = strtol(args[0], NULL, 0);
2997 mode = strtoul(args[1], NULL, 0);
2998 value = strtoul(args[2], NULL, 0);
2999
3000 return arm7_9_write_core_reg(target, num, mode, value);
3001 }
3002
3003 int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3004 {
3005 target_t *target = get_current_target(cmd_ctx);
3006 armv4_5_common_t *armv4_5;
3007 arm7_9_common_t *arm7_9;
3008
3009 if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
3010 {
3011 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
3012 return ERROR_OK;
3013 }
3014
3015 if (argc > 0)
3016 {
3017 if (strcmp("enable", args[0]) == 0)
3018 {
3019 arm7_9->use_dbgrq = 1;
3020 }
3021 else if (strcmp("disable", args[0]) == 0)
3022 {
3023 arm7_9->use_dbgrq = 0;
3024 }
3025 else
3026 {
3027 command_print(cmd_ctx, "usage: arm7_9 dbgrq <enable | disable>");
3028