1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2010 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2008 by Hongtao Zheng *
14 * Copyright (C) 2009 by David Brownell *
16 * This program is free software; you can redistribute it and/or modify *
17 * it under the terms of the GNU General Public License as published by *
18 * the Free Software Foundation; either version 2 of the License, or *
19 * (at your option) any later version. *
21 * This program is distributed in the hope that it will be useful, *
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
24 * GNU General Public License for more details. *
26 * You should have received a copy of the GNU General Public License *
27 * along with this program; if not, write to the *
28 * Free Software Foundation, Inc., *
29 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
30 ***************************************************************************/
36 #include "breakpoints.h"
37 #include "embeddedice.h"
38 #include "target_request.h"
40 #include <helper/time_support.h>
41 #include "arm_simulator.h"
42 #include "arm_semihosting.h"
43 #include "algorithm.h"
49 * Hold common code supporting the ARM7 and ARM9 core generations.
51 * While the ARM core implementations evolved substantially during these
52 * two generations, they look quite similar from the JTAG perspective.
53 * Both have similar debug facilities, based on the same two scan chains
54 * providing access to the core and to an EmbeddedICE module. Both can
55 * support similar ETM and ETB modules, for tracing. And both expose
56 * what could be viewed as "ARM Classic", with multiple processor modes,
57 * shadowed registers, and support for the Thumb instruction set.
59 * Processor differences include things like presence or absence of MMU
60 * and cache, pipeline sizes, use of a modified Harvard Architecure
61 * (with separate instruction and data busses from the CPU), support
62 * for cpu clock gating during idle, and more.
65 static int arm7_9_debug_entry(struct target *target);
68 * Clear watchpoints for an ARM7/9 target.
70 * @param arm7_9 Pointer to the common struct for an ARM7/9 target
71 * @return JTAG error status after executing queue
73 static int arm7_9_clear_watchpoints(struct arm7_9_common *arm7_9)
76 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
77 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
78 arm7_9->sw_breakpoint_count = 0;
79 arm7_9->sw_breakpoints_added = 0;
81 arm7_9->wp1_used = arm7_9->wp1_used_default;
82 arm7_9->wp_available = arm7_9->wp_available_max;
84 return jtag_execute_queue();
88 * Assign a watchpoint to one of the two available hardware comparators in an
89 * ARM7 or ARM9 target.
91 * @param arm7_9 Pointer to the common struct for an ARM7/9 target
92 * @param breakpoint Pointer to the breakpoint to be used as a watchpoint
94 static void arm7_9_assign_wp(struct arm7_9_common *arm7_9, struct breakpoint *breakpoint)
96 if (!arm7_9->wp0_used) {
99 arm7_9->wp_available--;
100 } else if (!arm7_9->wp1_used) {
101 arm7_9->wp1_used = 1;
103 arm7_9->wp_available--;
105 LOG_ERROR("BUG: no hardware comparator available");
106 LOG_DEBUG("BPID: %" PRId32 " (0x%08" PRIx32 ") using hw wp: %d",
107 breakpoint->unique_id,
113 * Setup an ARM7/9 target's embedded ICE registers for software breakpoints.
115 * @param arm7_9 Pointer to common struct for ARM7/9 targets
116 * @return Error codes if there is a problem finding a watchpoint or the result
117 * of executing the JTAG queue
119 static int arm7_9_set_software_breakpoints(struct arm7_9_common *arm7_9)
121 if (arm7_9->sw_breakpoints_added)
123 if (arm7_9->wp_available < 1) {
124 LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
125 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
127 arm7_9->wp_available--;
129 /* pick a breakpoint unit */
130 if (!arm7_9->wp0_used) {
131 arm7_9->sw_breakpoints_added = 1;
132 arm7_9->wp0_used = 3;
133 } else if (!arm7_9->wp1_used) {
134 arm7_9->sw_breakpoints_added = 2;
135 arm7_9->wp1_used = 3;
137 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
141 if (arm7_9->sw_breakpoints_added == 1) {
142 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
143 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
144 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
145 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
146 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
147 } else if (arm7_9->sw_breakpoints_added == 2) {
148 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
149 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
150 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
151 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
152 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
154 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
157 LOG_DEBUG("SW BP using hw wp: %d",
158 arm7_9->sw_breakpoints_added);
160 return jtag_execute_queue();
164 * Setup the common pieces for an ARM7/9 target after reset or on startup.
166 * @param target Pointer to an ARM7/9 target to setup
167 * @return Result of clearing the watchpoints on the target
169 static int arm7_9_setup(struct target *target)
171 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
173 return arm7_9_clear_watchpoints(arm7_9);
177 * Set either a hardware or software breakpoint on an ARM7/9 target. The
178 * breakpoint is set up even if it is already set. Some actions, e.g. reset,
179 * might have erased the values in Embedded ICE.
181 * @param target Pointer to the target device to set the breakpoints on
182 * @param breakpoint Pointer to the breakpoint to be set
183 * @return For hardware breakpoints, this is the result of executing the JTAG
184 * queue. For software breakpoints, this will be the status of the
185 * required memory reads and writes
187 static int arm7_9_set_breakpoint(struct target *target, struct breakpoint *breakpoint)
189 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
190 int retval = ERROR_OK;
192 LOG_DEBUG("BPID: %" PRId32 ", Address: 0x%08" PRIx32 ", Type: %d",
193 breakpoint->unique_id,
197 if (target->state != TARGET_HALTED) {
198 LOG_WARNING("target not halted");
199 return ERROR_TARGET_NOT_HALTED;
202 if (breakpoint->type == BKPT_HARD) {
203 /* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
204 uint32_t mask = (breakpoint->length == 4) ? 0x3u : 0x1u;
206 /* reassign a hw breakpoint */
207 if (breakpoint->set == 0)
208 arm7_9_assign_wp(arm7_9, breakpoint);
210 if (breakpoint->set == 1) {
211 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], breakpoint->address);
212 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
213 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffffu);
214 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
215 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
216 } else if (breakpoint->set == 2) {
217 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], breakpoint->address);
218 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
219 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffffu);
220 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
221 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
223 LOG_ERROR("BUG: no hardware comparator available");
227 retval = jtag_execute_queue();
228 } else if (breakpoint->type == BKPT_SOFT) {
229 /* did we already set this breakpoint? */
233 if (breakpoint->length == 4) {
234 uint32_t verify = 0xffffffff;
235 /* keep the original instruction in target endianness */
236 retval = target_read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
237 if (retval != ERROR_OK)
239 /* write the breakpoint instruction in target
240 * endianness (arm7_9->arm_bkpt is host endian) */
241 retval = target_write_u32(target, breakpoint->address, arm7_9->arm_bkpt);
242 if (retval != ERROR_OK)
245 retval = target_read_u32(target, breakpoint->address, &verify);
246 if (retval != ERROR_OK)
248 if (verify != arm7_9->arm_bkpt) {
249 LOG_ERROR("Unable to set 32 bit software breakpoint at address %08" PRIx32
250 " - check that memory is read/writable", breakpoint->address);
254 uint16_t verify = 0xffff;
255 /* keep the original instruction in target endianness */
256 retval = target_read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
257 if (retval != ERROR_OK)
259 /* write the breakpoint instruction in target
260 * endianness (arm7_9->thumb_bkpt is host endian) */
261 retval = target_write_u16(target, breakpoint->address, arm7_9->thumb_bkpt);
262 if (retval != ERROR_OK)
265 retval = target_read_u16(target, breakpoint->address, &verify);
266 if (retval != ERROR_OK)
268 if (verify != arm7_9->thumb_bkpt) {
269 LOG_ERROR("Unable to set thumb software breakpoint at address %08" PRIx32
270 " - check that memory is read/writable", breakpoint->address);
275 retval = arm7_9_set_software_breakpoints(arm7_9);
276 if (retval != ERROR_OK)
279 arm7_9->sw_breakpoint_count++;
288 * Unsets an existing breakpoint on an ARM7/9 target. If it is a hardware
289 * breakpoint, the watchpoint used will be freed and the Embedded ICE registers
290 * will be updated. Otherwise, the software breakpoint will be restored to its
291 * original instruction if it hasn't already been modified.
293 * @param target Pointer to ARM7/9 target to unset the breakpoint from
294 * @param breakpoint Pointer to breakpoint to be unset
295 * @return For hardware breakpoints, this is the result of executing the JTAG
296 * queue. For software breakpoints, this will be the status of the
297 * required memory reads and writes
299 static int arm7_9_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
301 int retval = ERROR_OK;
302 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
304 LOG_DEBUG("BPID: %" PRId32 ", Address: 0x%08" PRIx32,
305 breakpoint->unique_id,
306 breakpoint->address);
308 if (!breakpoint->set) {
309 LOG_WARNING("breakpoint not set");
313 if (breakpoint->type == BKPT_HARD) {
314 LOG_DEBUG("BPID: %" PRId32 " Releasing hw wp: %d",
315 breakpoint->unique_id,
317 if (breakpoint->set == 1) {
318 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
319 arm7_9->wp0_used = 0;
320 arm7_9->wp_available++;
321 } else if (breakpoint->set == 2) {
322 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
323 arm7_9->wp1_used = 0;
324 arm7_9->wp_available++;
326 retval = jtag_execute_queue();
329 /* restore original instruction (kept in target endianness) */
330 if (breakpoint->length == 4) {
331 uint32_t current_instr;
332 /* check that user program as not modified breakpoint instruction */
333 retval = target_read_memory(target,
334 breakpoint->address, 4, 1, (uint8_t *)¤t_instr);
335 if (retval != ERROR_OK)
337 current_instr = target_buffer_get_u32(target, (uint8_t *)¤t_instr);
338 if (current_instr == arm7_9->arm_bkpt) {
339 retval = target_write_memory(target,
340 breakpoint->address, 4, 1, breakpoint->orig_instr);
341 if (retval != ERROR_OK)
346 uint16_t current_instr;
347 /* check that user program as not modified breakpoint instruction */
348 retval = target_read_memory(target,
349 breakpoint->address, 2, 1, (uint8_t *)¤t_instr);
350 if (retval != ERROR_OK)
352 current_instr = target_buffer_get_u16(target, (uint8_t *)¤t_instr);
353 if (current_instr == arm7_9->thumb_bkpt) {
354 retval = target_write_memory(target,
355 breakpoint->address, 2, 1, breakpoint->orig_instr);
356 if (retval != ERROR_OK)
361 if (--arm7_9->sw_breakpoint_count == 0) {
362 /* We have removed the last sw breakpoint, clear the hw breakpoint we used
364 if (arm7_9->sw_breakpoints_added == 1)
365 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[
366 EICE_W0_CONTROL_VALUE], 0);
367 else if (arm7_9->sw_breakpoints_added == 2)
368 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[
369 EICE_W1_CONTROL_VALUE], 0);
379 * Add a breakpoint to an ARM7/9 target. This makes sure that there are no
380 * dangling breakpoints and that the desired breakpoint can be added.
382 * @param target Pointer to the target ARM7/9 device to add a breakpoint to
383 * @param breakpoint Pointer to the breakpoint to be added
384 * @return An error status if there is a problem adding the breakpoint or the
385 * result of setting the breakpoint
387 int arm7_9_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
389 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
391 if (arm7_9->breakpoint_count == 0) {
392 /* make sure we don't have any dangling breakpoints. This is vital upon
393 * GDB connect/disconnect
395 arm7_9_clear_watchpoints(arm7_9);
398 if ((breakpoint->type == BKPT_HARD) && (arm7_9->wp_available < 1)) {
399 LOG_INFO("no watchpoint unit available for hardware breakpoint");
400 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
403 if ((breakpoint->length != 2) && (breakpoint->length != 4)) {
404 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
405 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
408 if (breakpoint->type == BKPT_HARD)
409 arm7_9_assign_wp(arm7_9, breakpoint);
411 arm7_9->breakpoint_count++;
413 return arm7_9_set_breakpoint(target, breakpoint);
417 * Removes a breakpoint from an ARM7/9 target. This will make sure there are no
418 * dangling breakpoints and updates available watchpoints if it is a hardware
421 * @param target Pointer to the target to have a breakpoint removed
422 * @param breakpoint Pointer to the breakpoint to be removed
423 * @return Error status if there was a problem unsetting the breakpoint or the
424 * watchpoints could not be cleared
426 int arm7_9_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
428 int retval = ERROR_OK;
429 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
431 retval = arm7_9_unset_breakpoint(target, breakpoint);
432 if (retval != ERROR_OK)
435 if (breakpoint->type == BKPT_HARD)
436 arm7_9->wp_available++;
438 arm7_9->breakpoint_count--;
439 if (arm7_9->breakpoint_count == 0) {
440 /* make sure we don't have any dangling breakpoints */
441 retval = arm7_9_clear_watchpoints(arm7_9);
442 if (retval != ERROR_OK)
450 * Sets a watchpoint for an ARM7/9 target in one of the watchpoint units. It is
451 * considered a bug to call this function when there are no available watchpoint
454 * @param target Pointer to an ARM7/9 target to set a watchpoint on
455 * @param watchpoint Pointer to the watchpoint to be set
456 * @return Error status if watchpoint set fails or the result of executing the
459 static int arm7_9_set_watchpoint(struct target *target, struct watchpoint *watchpoint)
461 int retval = ERROR_OK;
462 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
466 mask = watchpoint->length - 1;
468 if (target->state != TARGET_HALTED) {
469 LOG_WARNING("target not halted");
470 return ERROR_TARGET_NOT_HALTED;
473 if (watchpoint->rw == WPT_ACCESS)
478 if (!arm7_9->wp0_used) {
479 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE],
480 watchpoint->address);
481 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
482 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK],
484 if (watchpoint->mask != 0xffffffffu)
485 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE],
487 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK],
488 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
489 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE],
490 EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
492 retval = jtag_execute_queue();
493 if (retval != ERROR_OK)
496 arm7_9->wp0_used = 2;
497 } else if (!arm7_9->wp1_used) {
498 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE],
499 watchpoint->address);
500 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
501 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK],
503 if (watchpoint->mask != 0xffffffffu)
504 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE],
506 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK],
507 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
508 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE],
509 EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
511 retval = jtag_execute_queue();
512 if (retval != ERROR_OK)
515 arm7_9->wp1_used = 2;
517 LOG_ERROR("BUG: no hardware comparator available");
525 * Unset an existing watchpoint and clear the used watchpoint unit.
527 * @param target Pointer to the target to have the watchpoint removed
528 * @param watchpoint Pointer to the watchpoint to be removed
529 * @return Error status while trying to unset the watchpoint or the result of
530 * executing the JTAG queue
532 static int arm7_9_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
534 int retval = ERROR_OK;
535 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
537 if (target->state != TARGET_HALTED) {
538 LOG_WARNING("target not halted");
539 return ERROR_TARGET_NOT_HALTED;
542 if (!watchpoint->set) {
543 LOG_WARNING("breakpoint not set");
547 if (watchpoint->set == 1) {
548 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
549 retval = jtag_execute_queue();
550 if (retval != ERROR_OK)
552 arm7_9->wp0_used = 0;
553 } else if (watchpoint->set == 2) {
554 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
555 retval = jtag_execute_queue();
556 if (retval != ERROR_OK)
558 arm7_9->wp1_used = 0;
566 * Add a watchpoint to an ARM7/9 target. If there are no watchpoint units
567 * available, an error response is returned.
569 * @param target Pointer to the ARM7/9 target to add a watchpoint to
570 * @param watchpoint Pointer to the watchpoint to be added
571 * @return Error status while trying to add the watchpoint
573 int arm7_9_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
575 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
577 if (arm7_9->wp_available < 1)
578 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
580 if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
581 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
583 arm7_9->wp_available--;
589 * Remove a watchpoint from an ARM7/9 target. The watchpoint will be unset and
590 * the used watchpoint unit will be reopened.
592 * @param target Pointer to the target to remove a watchpoint from
593 * @param watchpoint Pointer to the watchpoint to be removed
594 * @return Result of trying to unset the watchpoint
596 int arm7_9_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
598 int retval = ERROR_OK;
599 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
601 if (watchpoint->set) {
602 retval = arm7_9_unset_watchpoint(target, watchpoint);
603 if (retval != ERROR_OK)
607 arm7_9->wp_available++;
613 * Restarts the target by sending a RESTART instruction and moving the JTAG
614 * state to IDLE. This includes a timeout waiting for DBGACK and SYSCOMP to be
615 * asserted by the processor.
617 * @param target Pointer to target to issue commands to
618 * @return Error status if there is a timeout or a problem while executing the
621 int arm7_9_execute_sys_speed(struct target *target)
624 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
625 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
626 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
628 /* set RESTART instruction */
629 if (arm7_9->need_bypass_before_restart) {
630 arm7_9->need_bypass_before_restart = 0;
631 retval = arm_jtag_set_instr(jtag_info->tap, 0xf, NULL, TAP_IDLE);
632 if (retval != ERROR_OK)
635 retval = arm_jtag_set_instr(jtag_info->tap, 0x4, NULL, TAP_IDLE);
636 if (retval != ERROR_OK)
639 long long then = timeval_ms();
641 while (!(timeout = ((timeval_ms()-then) > 1000))) {
642 /* read debug status register */
643 embeddedice_read_reg(dbg_stat);
644 retval = jtag_execute_queue();
645 if (retval != ERROR_OK)
647 if ((buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
648 && (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_SYSCOMP, 1)))
650 if (debug_level >= 3)
656 LOG_ERROR("timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: %" PRIx32 "",
657 buf_get_u32(dbg_stat->value, 0, dbg_stat->size));
658 return ERROR_TARGET_TIMEOUT;
665 * Restarts the target by sending a RESTART instruction and moving the JTAG
666 * state to IDLE. This validates that DBGACK and SYSCOMP are set without
667 * waiting until they are.
669 * @param target Pointer to the target to issue commands to
670 * @return Always ERROR_OK
672 static int arm7_9_execute_fast_sys_speed(struct target *target)
675 static uint8_t check_value[4], check_mask[4];
677 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
678 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
679 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
682 /* set RESTART instruction */
683 if (arm7_9->need_bypass_before_restart) {
684 arm7_9->need_bypass_before_restart = 0;
685 retval = arm_jtag_set_instr(jtag_info->tap, 0xf, NULL, TAP_IDLE);
686 if (retval != ERROR_OK)
689 retval = arm_jtag_set_instr(jtag_info->tap, 0x4, NULL, TAP_IDLE);
690 if (retval != ERROR_OK)
694 /* check for DBGACK and SYSCOMP set (others don't care) */
696 /* NB! These are constants that must be available until after next jtag_execute() and
697 * we evaluate the values upon first execution in lieu of setting up these constants
698 * during early setup.
700 buf_set_u32(check_value, 0, 32, 0x9);
701 buf_set_u32(check_mask, 0, 32, 0x9);
705 /* read debug status register */
706 embeddedice_read_reg_w_check(dbg_stat, check_value, check_mask);
712 * Get some data from the ARM7/9 target.
714 * @param target Pointer to the ARM7/9 target to read data from
715 * @param size The number of 32bit words to be read
716 * @param buffer Pointer to the buffer that will hold the data
717 * @return The result of receiving data from the Embedded ICE unit
719 int arm7_9_target_request_data(struct target *target, uint32_t size, uint8_t *buffer)
721 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
722 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
724 int retval = ERROR_OK;
727 data = malloc(size * (sizeof(uint32_t)));
729 retval = embeddedice_receive(jtag_info, data, size);
731 /* return the 32-bit ints in the 8-bit array */
732 for (i = 0; i < size; i++)
733 h_u32_to_le(buffer + (i * 4), data[i]);
741 * Handles requests to an ARM7/9 target. If debug messaging is enabled, the
742 * target is running and the DCC control register has the W bit high, this will
743 * execute the request on the target.
745 * @param priv Void pointer expected to be a struct target pointer
746 * @return ERROR_OK unless there are issues with the JTAG queue or when reading
747 * from the Embedded ICE unit
749 static int arm7_9_handle_target_request(void *priv)
751 int retval = ERROR_OK;
752 struct target *target = priv;
753 if (!target_was_examined(target))
755 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
756 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
757 struct reg *dcc_control = &arm7_9->eice_cache->reg_list[EICE_COMMS_CTRL];
759 if (!target->dbg_msg_enabled)
762 if (target->state == TARGET_RUNNING) {
763 /* read DCC control register */
764 embeddedice_read_reg(dcc_control);
765 retval = jtag_execute_queue();
766 if (retval != ERROR_OK)
770 if (buf_get_u32(dcc_control->value, 1, 1) == 1) {
773 retval = embeddedice_receive(jtag_info, &request, 1);
774 if (retval != ERROR_OK)
776 retval = target_request(target, request);
777 if (retval != ERROR_OK)
786 * Polls an ARM7/9 target for its current status. If DBGACK is set, the target
787 * is manipulated to the right halted state based on its current state. This is
791 * <tr><th > State</th><th > Action</th></tr>
792 * <tr><td > TARGET_RUNNING | TARGET_RESET</td>
793 * <td > Enters debug mode. If TARGET_RESET, pc may be checked</td></tr>
794 * <tr><td > TARGET_UNKNOWN</td><td > Warning is logged</td></tr>
795 * <tr><td > TARGET_DEBUG_RUNNING</td><td > Enters debug mode</td></tr>
796 * <tr><td > TARGET_HALTED</td><td > Nothing</td></tr>
799 * If the target does not end up in the halted state, a warning is produced. If
800 * DBGACK is cleared, then the target is expected to either be running or
803 * @param target Pointer to the ARM7/9 target to poll
804 * @return ERROR_OK or an error status if a command fails
806 int arm7_9_poll(struct target *target)
809 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
810 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
812 /* read debug status register */
813 embeddedice_read_reg(dbg_stat);
814 retval = jtag_execute_queue();
815 if (retval != ERROR_OK)
818 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1)) {
819 /* LOG_DEBUG("DBGACK set, dbg_state->value: 0x%x", buf_get_u32(dbg_stat->value, 0, *32));*/
820 if (target->state == TARGET_UNKNOWN) {
821 /* Starting OpenOCD with target in debug-halt */
822 target->state = TARGET_RUNNING;
823 LOG_DEBUG("DBGACK already set during server startup.");
825 if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET)) {
826 target->state = TARGET_HALTED;
828 retval = arm7_9_debug_entry(target);
829 if (retval != ERROR_OK)
832 if (arm_semihosting(target, &retval) != 0)
835 retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED);
836 if (retval != ERROR_OK)
839 if (target->state == TARGET_DEBUG_RUNNING) {
840 target->state = TARGET_HALTED;
841 retval = arm7_9_debug_entry(target);
842 if (retval != ERROR_OK)
845 retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
846 if (retval != ERROR_OK)
849 if (target->state != TARGET_HALTED)
851 "DBGACK set, but the target did not end up in the halted state %d",
854 if (target->state != TARGET_DEBUG_RUNNING)
855 target->state = TARGET_RUNNING;
862 * Asserts the reset (SRST) on an ARM7/9 target. Some -S targets (ARM966E-S in
863 * the STR912 isn't affected, ARM926EJ-S in the LPC3180 and AT91SAM9260 is
864 * affected) completely stop the JTAG clock while the core is held in reset
865 * (SRST). It isn't possible to program the halt condition once reset is
866 * asserted, hence a hook that allows the target to set up its reset-halt
867 * condition is setup prior to asserting reset.
869 * @param target Pointer to an ARM7/9 target to assert reset on
870 * @return ERROR_FAIL if the JTAG device does not have SRST, otherwise ERROR_OK
872 int arm7_9_assert_reset(struct target *target)
874 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
875 enum reset_types jtag_reset_config = jtag_get_reset_config();
876 bool use_event = false;
878 /* TODO: apply hw reset signal in not examined state */
879 if (!(target_was_examined(target))) {
880 LOG_WARNING("Reset is not asserted because the target is not examined.");
881 LOG_WARNING("Use a reset button or power cycle the target.");
882 return ERROR_TARGET_NOT_EXAMINED;
885 LOG_DEBUG("target->state: %s", target_state_name(target));
887 if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
889 else if (!(jtag_reset_config & RESET_HAS_SRST)) {
890 LOG_ERROR("%s: how to reset?", target_name(target));
894 /* At this point trst has been asserted/deasserted once. We would
895 * like to program EmbeddedICE while SRST is asserted, instead of
896 * depending on SRST to leave that module alone. However, many CPUs
897 * gate the JTAG clock while SRST is asserted; or JTAG may need
898 * clock stability guarantees (adaptive clocking might help).
900 * So we assume JTAG access during SRST is off the menu unless it's
901 * been specifically enabled.
903 bool srst_asserted = false;
905 if (!use_event && !(jtag_reset_config & RESET_SRST_PULLS_TRST)
906 && (jtag_reset_config & RESET_SRST_NO_GATING)) {
907 jtag_add_reset(0, 1);
908 srst_asserted = true;
911 if (target->reset_halt) {
913 * For targets that don't support communication while SRST is
914 * asserted, we need to set up the reset vector catch first.
916 * When we use TRST+SRST and that's equivalent to a power-up
917 * reset, these settings may well be reset anyway; so setting
918 * them here won't matter.
920 if (arm7_9->has_vector_catch) {
921 /* program vector catch register to catch reset */
922 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH], 0x1);
924 /* extra runtest added as issues were found with
925 * certain ARM9 cores (maybe more) - AT91SAM9260
928 jtag_add_runtest(1, TAP_IDLE);
930 /* program watchpoint unit to match on reset vector
933 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], 0x0);
934 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0x3);
935 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
936 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
937 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
942 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
944 /* If we use SRST ... we'd like to issue just SRST, but the
945 * board or chip may be set up so we have to assert TRST as
946 * well. On some chips that combination is equivalent to a
947 * power-up reset, and generally clobbers EICE state.
949 if (jtag_reset_config & RESET_SRST_PULLS_TRST)
950 jtag_add_reset(1, 1);
951 else if (!srst_asserted)
952 jtag_add_reset(0, 1);
953 jtag_add_sleep(50000);
956 target->state = TARGET_RESET;
957 register_cache_invalidate(arm7_9->arm.core_cache);
959 /* REVISIT why isn't standard debug entry logic sufficient?? */
960 if (target->reset_halt && (!(jtag_reset_config & RESET_SRST_PULLS_TRST) || use_event)) {
961 /* debug entry was prepared above */
962 target->debug_reason = DBG_REASON_DBGRQ;
969 * Deassert the reset (SRST) signal on an ARM7/9 target. If SRST pulls TRST
970 * and the target is being reset into a halt, a warning will be triggered
971 * because it is not possible to reset into a halted mode in this case. The
972 * target is halted using the target's functions.
974 * @param target Pointer to the target to have the reset deasserted
975 * @return ERROR_OK or an error from polling or halting the target
977 int arm7_9_deassert_reset(struct target *target)
979 int retval = ERROR_OK;
980 LOG_DEBUG("target->state: %s", target_state_name(target));
982 /* deassert reset lines */
983 jtag_add_reset(0, 0);
985 /* In case polling is disabled, we need to examine the
986 * target and poll here for this target to work correctly.
988 * Otherwise, e.g. halt will fail afterwards with bogus
989 * error messages as halt will believe that reset is
992 retval = target_examine_one(target);
993 if (retval != ERROR_OK)
996 retval = target_poll(target);
997 if (retval != ERROR_OK)
1000 enum reset_types jtag_reset_config = jtag_get_reset_config();
1001 if (target->reset_halt && (jtag_reset_config & RESET_SRST_PULLS_TRST) != 0) {
1003 "srst pulls trst - can not reset into halted mode. Issuing halt after reset.");
1004 retval = target_halt(target);
1005 if (retval != ERROR_OK)
1012 * Clears the halt condition for an ARM7/9 target. If it isn't coming out of
1013 * reset and if DBGRQ is used, it is progammed to be deasserted. If the reset
1014 * vector catch was used, it is restored. Otherwise, the control value is
1015 * restored and the watchpoint unit is restored if it was in use.
1017 * @param target Pointer to the ARM7/9 target to have halt cleared
1018 * @return Always ERROR_OK
1020 static int arm7_9_clear_halt(struct target *target)
1022 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1023 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1025 /* we used DBGRQ only if we didn't come out of reset */
1026 if (!arm7_9->debug_entry_from_reset && arm7_9->use_dbgrq) {
1027 /* program EmbeddedICE Debug Control Register to deassert DBGRQ
1029 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1030 embeddedice_store_reg(dbg_ctrl);
1032 if (arm7_9->debug_entry_from_reset && arm7_9->has_vector_catch) {
1033 /* if we came out of reset, and vector catch is supported, we used
1034 * vector catch to enter debug state
1035 * restore the register in that case
1037 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH]);
1039 /* restore registers if watchpoint unit 0 was in use
1041 if (arm7_9->wp0_used) {
1042 if (arm7_9->debug_entry_from_reset)
1043 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[
1044 EICE_W0_ADDR_VALUE]);
1045 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[
1046 EICE_W0_ADDR_MASK]);
1047 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[
1048 EICE_W0_DATA_MASK]);
1049 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[
1050 EICE_W0_CONTROL_MASK]);
1052 /* control value always has to be restored, as it was either disabled,
1053 * or enabled with possibly different bits
1055 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
1063 * Issue a software reset and halt to an ARM7/9 target. The target is halted
1064 * and then there is a wait until the processor shows the halt. This wait can
1065 * timeout and results in an error being returned. The software reset involves
1066 * clearing the halt, updating the debug control register, changing to ARM mode,
1067 * reset of the program counter, and reset of all of the registers.
1069 * @param target Pointer to the ARM7/9 target to be reset and halted by software
1070 * @return Error status if any of the commands fail, otherwise ERROR_OK
1072 int arm7_9_soft_reset_halt(struct target *target)
1074 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1075 struct arm *arm = &arm7_9->arm;
1076 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
1077 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1081 /* FIX!!! replace some of this code with tcl commands
1083 * halt # the halt command is synchronous
1084 * armv4_5 core_state arm
1088 retval = target_halt(target);
1089 if (retval != ERROR_OK)
1092 long long then = timeval_ms();
1094 while (!(timeout = ((timeval_ms()-then) > 1000))) {
1095 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) != 0)
1097 embeddedice_read_reg(dbg_stat);
1098 retval = jtag_execute_queue();
1099 if (retval != ERROR_OK)
1101 if (debug_level >= 3)
1107 LOG_ERROR("Failed to halt CPU after 1 sec");
1108 return ERROR_TARGET_TIMEOUT;
1110 target->state = TARGET_HALTED;
1112 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1113 * ensure that DBGRQ is cleared
1115 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
1116 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1117 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
1118 embeddedice_store_reg(dbg_ctrl);
1120 retval = arm7_9_clear_halt(target);
1121 if (retval != ERROR_OK)
1124 /* if the target is in Thumb state, change to ARM state */
1125 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1)) {
1126 uint32_t r0_thumb, pc_thumb;
1127 LOG_DEBUG("target entered debug from Thumb state, changing to ARM");
1128 /* Entered debug from Thumb mode */
1129 arm->core_state = ARM_STATE_THUMB;
1130 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
1133 /* REVISIT likewise for bit 5 -- switch Jazelle-to-ARM */
1135 /* all register content is now invalid */
1136 register_cache_invalidate(arm->core_cache);
1138 /* SVC, ARM state, IRQ and FIQ disabled */
1141 cpsr = buf_get_u32(arm->cpsr->value, 0, 32);
1144 arm_set_cpsr(arm, cpsr);
1145 arm->cpsr->dirty = 1;
1147 /* start fetching from 0x0 */
1148 buf_set_u32(arm->pc->value, 0, 32, 0x0);
1152 /* reset registers */
1153 for (i = 0; i <= 14; i++) {
1154 struct reg *r = arm_reg_current(arm, i);
1156 buf_set_u32(r->value, 0, 32, 0xffffffff);
1161 retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1162 if (retval != ERROR_OK)
1169 * Halt an ARM7/9 target. This is accomplished by either asserting the DBGRQ
1170 * line or by programming a watchpoint to trigger on any address. It is
1171 * considered a bug to call this function while the target is in the
1172 * TARGET_RESET state.
1174 * @param target Pointer to the ARM7/9 target to be halted
1175 * @return Always ERROR_OK
1177 int arm7_9_halt(struct target *target)
1179 if (target->state == TARGET_RESET) {
1181 "BUG: arm7/9 does not support halt during reset. This is handled in arm7_9_assert_reset()");
1185 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1186 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1188 LOG_DEBUG("target->state: %s",
1189 target_state_name(target));
1191 if (target->state == TARGET_HALTED) {
1192 LOG_DEBUG("target was already halted");
1196 if (target->state == TARGET_UNKNOWN)
1197 LOG_WARNING("target was in unknown state when halt was requested");
1199 if (arm7_9->use_dbgrq) {
1200 /* program EmbeddedICE Debug Control Register to assert DBGRQ
1202 if (arm7_9->set_special_dbgrq)
1203 arm7_9->set_special_dbgrq(target);
1205 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 1);
1206 embeddedice_store_reg(dbg_ctrl);
1209 /* program watchpoint unit to match on any address
1211 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1212 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1213 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE],
1214 EICE_W_CTRL_ENABLE);
1215 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK],
1216 ~EICE_W_CTRL_nOPC & 0xff);
1219 target->debug_reason = DBG_REASON_DBGRQ;
1225 * Handle an ARM7/9 target's entry into debug mode. The halt is cleared on the
1226 * ARM. The JTAG queue is then executed and the reason for debug entry is
1227 * examined. Once done, the target is verified to be halted and the processor
1228 * is forced into ARM mode. The core registers are saved for the current core
1229 * mode and the program counter (register 15) is updated as needed. The core
1230 * registers and CPSR and SPSR are saved for restoration later.
1232 * @param target Pointer to target that is entering debug mode
1233 * @return Error code if anything fails, otherwise ERROR_OK
1235 static int arm7_9_debug_entry(struct target *target)
1238 uint32_t context[16];
1239 uint32_t *context_p[16];
1240 uint32_t r0_thumb, pc_thumb;
1241 uint32_t cpsr, cpsr_mask = 0;
1243 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1244 struct arm *arm = &arm7_9->arm;
1245 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
1246 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1248 #ifdef _DEBUG_ARM7_9_
1252 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1253 * ensure that DBGRQ is cleared
1255 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
1256 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1257 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
1258 embeddedice_store_reg(dbg_ctrl);
1260 retval = arm7_9_clear_halt(target);
1261 if (retval != ERROR_OK)
1264 retval = jtag_execute_queue();
1265 if (retval != ERROR_OK)
1268 retval = arm7_9->examine_debug_reason(target);
1269 if (retval != ERROR_OK)
1272 if (target->state != TARGET_HALTED) {
1273 LOG_WARNING("target not halted");
1274 return ERROR_TARGET_NOT_HALTED;
1277 /* if the target is in Thumb state, change to ARM state */
1278 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1)) {
1279 LOG_DEBUG("target entered debug from Thumb state");
1280 /* Entered debug from Thumb mode */
1281 arm->core_state = ARM_STATE_THUMB;
1283 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
1284 LOG_DEBUG("r0_thumb: 0x%8.8" PRIx32
1285 ", pc_thumb: 0x%8.8" PRIx32, r0_thumb, pc_thumb);
1286 } else if (buf_get_u32(dbg_stat->value, 5, 1)) {
1287 /* \todo Get some vaguely correct handling of Jazelle, if
1288 * anyone ever uses it and full info becomes available.
1289 * See ARM9EJS TRM B.7.1 for how to switch J->ARM; and
1290 * B.7.3 for the reverse. That'd be the bare minimum...
1292 LOG_DEBUG("target entered debug from Jazelle state");
1293 arm->core_state = ARM_STATE_JAZELLE;
1294 cpsr_mask = 1 << 24;
1295 LOG_ERROR("Jazelle debug entry -- BROKEN!");
1297 LOG_DEBUG("target entered debug from ARM state");
1298 /* Entered debug from ARM mode */
1299 arm->core_state = ARM_STATE_ARM;
1302 for (i = 0; i < 16; i++)
1303 context_p[i] = &context[i];
1304 /* save core registers (r0 - r15 of current core mode) */
1305 arm7_9->read_core_regs(target, 0xffff, context_p);
1307 arm7_9->read_xpsr(target, &cpsr, 0);
1309 retval = jtag_execute_queue();
1310 if (retval != ERROR_OK)
1313 /* Sync our CPSR copy with J or T bits EICE reported, but
1314 * which we then erased by putting the core into ARM mode.
1316 arm_set_cpsr(arm, cpsr | cpsr_mask);
1318 if (!is_arm_mode(arm->core_mode)) {
1319 target->state = TARGET_UNKNOWN;
1320 LOG_ERROR("cpsr contains invalid mode value - communication failure");
1321 return ERROR_TARGET_FAILURE;
1324 LOG_DEBUG("target entered debug state in %s mode",
1325 arm_mode_name(arm->core_mode));
1327 if (arm->core_state == ARM_STATE_THUMB) {
1328 LOG_DEBUG("thumb state, applying fixups");
1329 context[0] = r0_thumb;
1330 context[15] = pc_thumb;
1331 } else if (arm->core_state == ARM_STATE_ARM) {
1332 /* adjust value stored by STM */
1333 context[15] -= 3 * 4;
1336 if ((target->debug_reason != DBG_REASON_DBGRQ) || (!arm7_9->use_dbgrq))
1337 context[15] -= 3 * ((arm->core_state == ARM_STATE_ARM) ? 4 : 2);
1339 context[15] -= arm7_9->dbgreq_adjust_pc *
1340 ((arm->core_state == ARM_STATE_ARM) ? 4 : 2);
1342 for (i = 0; i <= 15; i++) {
1343 struct reg *r = arm_reg_current(arm, i);
1345 LOG_DEBUG("r%i: 0x%8.8" PRIx32 "", i, context[i]);
1347 buf_set_u32(r->value, 0, 32, context[i]);
1348 /* r0 and r15 (pc) have to be restored later */
1349 r->dirty = (i == 0) || (i == 15);
1353 LOG_DEBUG("entered debug state at PC 0x%" PRIx32 "", context[15]);
1355 /* exceptions other than USR & SYS have a saved program status register */
1358 arm7_9->read_xpsr(target, &spsr, 1);
1359 retval = jtag_execute_queue();
1360 if (retval != ERROR_OK)
1362 buf_set_u32(arm->spsr->value, 0, 32, spsr);
1363 arm->spsr->dirty = 0;
1364 arm->spsr->valid = 1;
1367 retval = jtag_execute_queue();
1368 if (retval != ERROR_OK)
1371 if (arm7_9->post_debug_entry) {
1372 retval = arm7_9->post_debug_entry(target);
1373 if (retval != ERROR_OK)
1381 * Validate the full context for an ARM7/9 target in all processor modes. If
1382 * there are any invalid registers for the target, they will all be read. This
1385 * @param target Pointer to the ARM7/9 target to capture the full context from
1386 * @return Error if the target is not halted, has an invalid core mode, or if
1387 * the JTAG queue fails to execute
1389 static int arm7_9_full_context(struct target *target)
1393 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1394 struct arm *arm = &arm7_9->arm;
1398 if (target->state != TARGET_HALTED) {
1399 LOG_WARNING("target not halted");
1400 return ERROR_TARGET_NOT_HALTED;
1403 if (!is_arm_mode(arm->core_mode)) {
1404 LOG_ERROR("not a valid arm core mode - communication failure?");
1408 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1409 * SYS shares registers with User, so we don't touch SYS
1411 for (i = 0; i < 6; i++) {
1413 uint32_t *reg_p[16];
1417 /* check if there are invalid registers in the current mode
1419 for (j = 0; j <= 16; j++) {
1420 if (ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1427 /* change processor mode (and mask T bit) */
1428 tmp_cpsr = buf_get_u32(arm->cpsr->value, 0, 8)
1430 tmp_cpsr |= armv4_5_number_to_mode(i);
1432 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1434 for (j = 0; j < 15; j++) {
1435 if (ARMV4_5_CORE_REG_MODE(arm->core_cache,
1436 armv4_5_number_to_mode(i), j).valid == 0) {
1437 reg_p[j] = (uint32_t *)ARMV4_5_CORE_REG_MODE(
1439 armv4_5_number_to_mode(i),
1442 ARMV4_5_CORE_REG_MODE(arm->core_cache,
1443 armv4_5_number_to_mode(i),
1445 ARMV4_5_CORE_REG_MODE(arm->core_cache,
1446 armv4_5_number_to_mode(i),
1451 /* if only the PSR is invalid, mask is all zeroes */
1453 arm7_9->read_core_regs(target, mask, reg_p);
1455 /* check if the PSR has to be read */
1456 if (ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(i),
1458 arm7_9->read_xpsr(target,
1459 (uint32_t *)ARMV4_5_CORE_REG_MODE(arm->core_cache,
1460 armv4_5_number_to_mode(i), 16).value, 1);
1461 ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(i),
1463 ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(i),
1469 /* restore processor mode (mask T bit) */
1470 arm7_9->write_xpsr_im8(target,
1471 buf_get_u32(arm->cpsr->value, 0, 8) & ~0x20, 0, 0);
1473 retval = jtag_execute_queue();
1474 if (retval != ERROR_OK)
1480 * Restore the processor context on an ARM7/9 target. The full processor
1481 * context is analyzed to see if any of the registers are dirty on this end, but
1482 * have a valid new value. If this is the case, the processor is changed to the
1483 * appropriate mode and the new register values are written out to the
1484 * processor. If there happens to be a dirty register with an invalid value, an
1485 * error will be logged.
1487 * @param target Pointer to the ARM7/9 target to have its context restored
1488 * @return Error status if the target is not halted or the core mode in the
1489 * armv4_5 struct is invalid.
1491 static int arm7_9_restore_context(struct target *target)
1493 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1494 struct arm *arm = &arm7_9->arm;
1496 enum arm_mode current_mode = arm->core_mode;
1503 if (target->state != TARGET_HALTED) {
1504 LOG_WARNING("target not halted");
1505 return ERROR_TARGET_NOT_HALTED;
1508 if (arm7_9->pre_restore_context)
1509 arm7_9->pre_restore_context(target);
1511 if (!is_arm_mode(arm->core_mode)) {
1512 LOG_ERROR("not a valid arm core mode - communication failure?");
1516 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1517 * SYS shares registers with User, so we don't touch SYS
1519 for (i = 0; i < 6; i++) {
1520 LOG_DEBUG("examining %s mode",
1521 arm_mode_name(arm->core_mode));
1524 /* check if there are dirty registers in the current mode
1526 for (j = 0; j <= 16; j++) {
1527 reg = &ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(i), j);
1528 if (reg->dirty == 1) {
1529 if (reg->valid == 1) {
1531 LOG_DEBUG("examining dirty reg: %s", reg->name);
1532 struct arm_reg *reg_arch_info;
1533 reg_arch_info = reg->arch_info;
1534 if ((reg_arch_info->mode != ARM_MODE_ANY)
1535 && (reg_arch_info->mode != current_mode)
1536 && !((reg_arch_info->mode == ARM_MODE_USR)
1537 && (arm->core_mode == ARM_MODE_SYS))
1538 && !((reg_arch_info->mode == ARM_MODE_SYS)
1539 && (arm->core_mode == ARM_MODE_USR))) {
1541 LOG_DEBUG("require mode change");
1544 LOG_ERROR("BUG: dirty register '%s', but no valid data",
1550 uint32_t mask = 0x0;
1557 /* change processor mode (mask T bit) */
1558 tmp_cpsr = buf_get_u32(arm->cpsr->value,
1560 tmp_cpsr |= armv4_5_number_to_mode(i);
1562 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1563 current_mode = armv4_5_number_to_mode(i);
1566 for (j = 0; j <= 14; j++) {
1567 reg = &ARMV4_5_CORE_REG_MODE(arm->core_cache,
1568 armv4_5_number_to_mode(i),
1571 if (reg->dirty == 1) {
1572 regs[j] = buf_get_u32(reg->value, 0, 32);
1577 LOG_DEBUG("writing register %i mode %s "
1578 "with value 0x%8.8" PRIx32, j,
1579 arm_mode_name(arm->core_mode),
1585 arm7_9->write_core_regs(target, mask, regs);
1588 &ARMV4_5_CORE_REG_MODE(arm->core_cache, armv4_5_number_to_mode(
1590 struct arm_reg *reg_arch_info;
1591 reg_arch_info = reg->arch_info;
1592 if ((reg->dirty) && (reg_arch_info->mode != ARM_MODE_ANY)) {
1593 LOG_DEBUG("writing SPSR of mode %i with value 0x%8.8" PRIx32 "",
1595 buf_get_u32(reg->value, 0, 32));
1596 arm7_9->write_xpsr(target, buf_get_u32(reg->value, 0, 32), 1);
1601 if (!arm->cpsr->dirty && (arm->core_mode != current_mode)) {
1602 /* restore processor mode (mask T bit) */
1605 tmp_cpsr = buf_get_u32(arm->cpsr->value, 0, 8) & 0xE0;
1606 tmp_cpsr |= armv4_5_number_to_mode(i);
1608 LOG_DEBUG("writing lower 8 bit of cpsr with value 0x%2.2x", (unsigned)(tmp_cpsr));
1609 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1611 } else if (arm->cpsr->dirty) {
1612 /* CPSR has been changed, full restore necessary (mask T bit) */
1613 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32,
1614 buf_get_u32(arm->cpsr->value, 0, 32));
1615 arm7_9->write_xpsr(target,
1616 buf_get_u32(arm->cpsr->value, 0, 32)
1618 arm->cpsr->dirty = 0;
1619 arm->cpsr->valid = 1;
1623 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32,
1624 buf_get_u32(arm->pc->value, 0, 32));
1625 arm7_9->write_pc(target, buf_get_u32(arm->pc->value, 0, 32));
1632 * Restart the core of an ARM7/9 target. A RESTART command is sent to the
1633 * instruction register and the JTAG state is set to TAP_IDLE causing a core
1636 * @param target Pointer to the ARM7/9 target to be restarted
1637 * @return Result of executing the JTAG queue
1639 static int arm7_9_restart_core(struct target *target)
1641 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1642 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
1645 /* set RESTART instruction */
1646 if (arm7_9->need_bypass_before_restart) {
1647 arm7_9->need_bypass_before_restart = 0;
1649 retval = arm_jtag_set_instr(jtag_info->tap, 0xf, NULL, TAP_IDLE);
1650 if (retval != ERROR_OK)
1653 retval = arm_jtag_set_instr(jtag_info->tap, 0x4, NULL, TAP_IDLE);
1654 if (retval != ERROR_OK)
1657 jtag_add_runtest(1, TAP_IDLE);
1658 return jtag_execute_queue();
1662 * Enable the watchpoints on an ARM7/9 target. The target's watchpoints are
1663 * iterated through and are set on the target if they aren't already set.
1665 * @param target Pointer to the ARM7/9 target to enable watchpoints on
1667 static void arm7_9_enable_watchpoints(struct target *target)
1669 struct watchpoint *watchpoint = target->watchpoints;
1671 while (watchpoint) {
1672 if (watchpoint->set == 0)
1673 arm7_9_set_watchpoint(target, watchpoint);
1674 watchpoint = watchpoint->next;
1679 * Enable the breakpoints on an ARM7/9 target. The target's breakpoints are
1680 * iterated through and are set on the target.
1682 * @param target Pointer to the ARM7/9 target to enable breakpoints on
1684 static void arm7_9_enable_breakpoints(struct target *target)
1686 struct breakpoint *breakpoint = target->breakpoints;
1688 /* set any pending breakpoints */
1689 while (breakpoint) {
1690 arm7_9_set_breakpoint(target, breakpoint);
1691 breakpoint = breakpoint->next;
1695 int arm7_9_resume(struct target *target,
1698 int handle_breakpoints,
1699 int debug_execution)
1701 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1702 struct arm *arm = &arm7_9->arm;
1703 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1704 int err, retval = ERROR_OK;
1708 if (target->state != TARGET_HALTED) {
1709 LOG_WARNING("target not halted");
1710 return ERROR_TARGET_NOT_HALTED;
1713 if (!debug_execution)
1714 target_free_all_working_areas(target);
1716 /* current = 1: continue on current pc, otherwise continue at <address> */
1718 buf_set_u32(arm->pc->value, 0, 32, address);
1720 uint32_t current_pc;
1721 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1723 /* the front-end may request us not to handle breakpoints */
1724 if (handle_breakpoints) {
1725 struct breakpoint *breakpoint;
1726 breakpoint = breakpoint_find(target,
1727 buf_get_u32(arm->pc->value, 0, 32));
1728 if (breakpoint != NULL) {
1729 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (id: %" PRId32,
1730 breakpoint->address,
1731 breakpoint->unique_id);
1732 retval = arm7_9_unset_breakpoint(target, breakpoint);
1733 if (retval != ERROR_OK)
1736 /* calculate PC of next instruction */
1738 retval = arm_simulate_step(target, &next_pc);
1739 if (retval != ERROR_OK) {
1740 uint32_t current_opcode;
1741 target_read_u32(target, current_pc, ¤t_opcode);
1743 "Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "",
1748 LOG_DEBUG("enable single-step");
1749 arm7_9->enable_single_step(target, next_pc);
1751 target->debug_reason = DBG_REASON_SINGLESTEP;
1753 retval = arm7_9_restore_context(target);
1754 if (retval != ERROR_OK)
1757 if (arm->core_state == ARM_STATE_ARM)
1758 arm7_9->branch_resume(target);
1759 else if (arm->core_state == ARM_STATE_THUMB)
1760 arm7_9->branch_resume_thumb(target);
1762 LOG_ERROR("unhandled core state");
1766 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1767 embeddedice_write_reg(dbg_ctrl,
1768 buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1769 err = arm7_9_execute_sys_speed(target);
1771 LOG_DEBUG("disable single-step");
1772 arm7_9->disable_single_step(target);
1774 if (err != ERROR_OK) {
1775 retval = arm7_9_set_breakpoint(target, breakpoint);
1776 if (retval != ERROR_OK)
1778 target->state = TARGET_UNKNOWN;
1782 retval = arm7_9_debug_entry(target);
1783 if (retval != ERROR_OK)
1785 LOG_DEBUG("new PC after step: 0x%8.8" PRIx32,
1786 buf_get_u32(arm->pc->value, 0, 32));
1788 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
1789 retval = arm7_9_set_breakpoint(target, breakpoint);
1790 if (retval != ERROR_OK)
1795 /* enable any pending breakpoints and watchpoints */
1796 arm7_9_enable_breakpoints(target);
1797 arm7_9_enable_watchpoints(target);
1799 retval = arm7_9_restore_context(target);
1800 if (retval != ERROR_OK)
1803 if (arm->core_state == ARM_STATE_ARM)
1804 arm7_9->branch_resume(target);
1805 else if (arm->core_state == ARM_STATE_THUMB)
1806 arm7_9->branch_resume_thumb(target);
1808 LOG_ERROR("unhandled core state");
1812 /* deassert DBGACK and INTDIS */
1813 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1814 /* INTDIS only when we really resume, not during debug execution */
1815 if (!debug_execution)
1816 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 0);
1817 embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1819 retval = arm7_9_restart_core(target);
1820 if (retval != ERROR_OK)
1823 target->debug_reason = DBG_REASON_NOTHALTED;
1825 if (!debug_execution) {
1826 /* registers are now invalid */
1827 register_cache_invalidate(arm->core_cache);
1828 target->state = TARGET_RUNNING;
1829 retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1830 if (retval != ERROR_OK)
1833 target->state = TARGET_DEBUG_RUNNING;
1834 retval = target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1835 if (retval != ERROR_OK)
1839 LOG_DEBUG("target resumed");
1844 void arm7_9_enable_eice_step(struct target *target, uint32_t next_pc)
1846 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1847 struct arm *arm = &arm7_9->arm;
1848 uint32_t current_pc;
1849 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1851 if (next_pc != current_pc) {
1852 /* setup an inverse breakpoint on the current PC
1853 * - comparator 1 matches the current address
1854 * - rangeout from comparator 1 is connected to comparator 0 rangein
1855 * - comparator 0 matches any address, as long as rangein is low */
1856 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1857 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1858 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE],
1859 EICE_W_CTRL_ENABLE);
1860 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK],
1861 ~(EICE_W_CTRL_RANGE | EICE_W_CTRL_nOPC) & 0xff);
1862 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE],
1864 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
1865 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
1866 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
1867 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK],
1868 ~EICE_W_CTRL_nOPC & 0xff);
1870 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1871 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1872 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
1873 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff);
1874 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], next_pc);
1875 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
1876 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
1877 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE],
1878 EICE_W_CTRL_ENABLE);
1879 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK],
1880 ~EICE_W_CTRL_nOPC & 0xff);
1884 void arm7_9_disable_eice_step(struct target *target)
1886 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1888 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
1889 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
1890 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
1891 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
1892 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE]);
1893 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK]);
1894 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK]);
1895 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK]);
1896 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE]);
1899 int arm7_9_step(struct target *target, int current, uint32_t address, int handle_breakpoints)
1901 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1902 struct arm *arm = &arm7_9->arm;
1903 struct breakpoint *breakpoint = NULL;
1906 if (target->state != TARGET_HALTED) {
1907 LOG_WARNING("target not halted");
1908 return ERROR_TARGET_NOT_HALTED;
1911 /* current = 1: continue on current pc, otherwise continue at <address> */
1913 buf_set_u32(arm->pc->value, 0, 32, address);
1915 uint32_t current_pc = buf_get_u32(arm->pc->value, 0, 32);
1917 /* the front-end may request us not to handle breakpoints */
1918 if (handle_breakpoints)
1919 breakpoint = breakpoint_find(target, current_pc);
1920 if (breakpoint != NULL) {
1921 retval = arm7_9_unset_breakpoint(target, breakpoint);
1922 if (retval != ERROR_OK)
1926 target->debug_reason = DBG_REASON_SINGLESTEP;
1928 /* calculate PC of next instruction */
1930 retval = arm_simulate_step(target, &next_pc);
1931 if (retval != ERROR_OK) {
1932 uint32_t current_opcode;
1933 target_read_u32(target, current_pc, ¤t_opcode);
1935 "Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "",
1940 retval = arm7_9_restore_context(target);
1941 if (retval != ERROR_OK)
1944 arm7_9->enable_single_step(target, next_pc);
1946 if (arm->core_state == ARM_STATE_ARM)
1947 arm7_9->branch_resume(target);
1948 else if (arm->core_state == ARM_STATE_THUMB)
1949 arm7_9->branch_resume_thumb(target);
1951 LOG_ERROR("unhandled core state");
1955 retval = target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1956 if (retval != ERROR_OK)
1959 err = arm7_9_execute_sys_speed(target);
1960 arm7_9->disable_single_step(target);
1962 /* registers are now invalid */
1963 register_cache_invalidate(arm->core_cache);
1965 if (err != ERROR_OK)
1966 target->state = TARGET_UNKNOWN;
1968 retval = arm7_9_debug_entry(target);
1969 if (retval != ERROR_OK)
1971 retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1972 if (retval != ERROR_OK)
1974 LOG_DEBUG("target stepped");
1978 retval = arm7_9_set_breakpoint(target, breakpoint);
1979 if (retval != ERROR_OK)
1986 static int arm7_9_read_core_reg(struct target *target, struct reg *r,
1987 int num, enum arm_mode mode)
1989 uint32_t *reg_p[16];
1991 struct arm_reg *areg = r->arch_info;
1992 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
1993 struct arm *arm = &arm7_9->arm;
1995 if (!is_arm_mode(arm->core_mode))
1997 if ((num < 0) || (num > 16))
1998 return ERROR_COMMAND_SYNTAX_ERROR;
2000 if ((mode != ARM_MODE_ANY) && (mode != arm->core_mode)
2001 && (areg->mode != ARM_MODE_ANY)) {
2004 /* change processor mode (mask T bit) */
2005 tmp_cpsr = buf_get_u32(arm->cpsr->value, 0, 8) & 0xE0;
2008 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
2012 if ((num >= 0) && (num <= 15)) {
2013 /* read a normal core register */
2014 reg_p[num] = &value;
2016 arm7_9->read_core_regs(target, 1 << num, reg_p);
2018 /* read a program status register
2019 * if the register mode is MODE_ANY, we read the cpsr, otherwise a spsr
2021 arm7_9->read_xpsr(target, &value, areg->mode != ARM_MODE_ANY);
2024 retval = jtag_execute_queue();
2025 if (retval != ERROR_OK)
2030 buf_set_u32(r->value, 0, 32, value);
2032 if ((mode != ARM_MODE_ANY) && (mode != arm->core_mode)
2033 && (areg->mode != ARM_MODE_ANY)) {
2034 /* restore processor mode (mask T bit) */
2035 arm7_9->write_xpsr_im8(target,
2036 buf_get_u32(arm->cpsr->value, 0, 8) & ~0x20, 0, 0);
2042 static int arm7_9_write_core_reg(struct target *target, struct reg *r,
2043 int num, enum arm_mode mode, uint8_t *value)
2046 struct arm_reg *areg = r->arch_info;
2047 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2048 struct arm *arm = &arm7_9->arm;
2050 if (!is_arm_mode(arm->core_mode))
2052 if ((num < 0) || (num > 16))
2053 return ERROR_COMMAND_SYNTAX_ERROR;
2055 if ((mode != ARM_MODE_ANY) && (mode != arm->core_mode)
2056 && (areg->mode != ARM_MODE_ANY)) {
2059 /* change processor mode (mask T bit) */
2060 tmp_cpsr = buf_get_u32(arm->cpsr->value, 0, 8) & 0xE0;
2063 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
2066 if ((num >= 0) && (num <= 15)) {
2067 /* write a normal core register */
2068 reg[num] = buf_get_u32(value, 0, 32);
2070 arm7_9->write_core_regs(target, 1 << num, reg);
2072 /* write a program status register
2073 * if the register mode is MODE_ANY, we write the cpsr, otherwise a spsr
2075 int spsr = (areg->mode != ARM_MODE_ANY);
2077 uint32_t t = buf_get_u32(value, 0, 32);
2078 /* if we're writing the CPSR, mask the T bit */
2082 arm7_9->write_xpsr(target, t, spsr);
2088 if ((mode != ARM_MODE_ANY) && (mode != arm->core_mode)
2089 && (areg->mode != ARM_MODE_ANY)) {
2090 /* restore processor mode (mask T bit) */
2091 arm7_9->write_xpsr_im8(target,
2092 buf_get_u32(arm->cpsr->value, 0, 8) & ~0x20, 0, 0);
2095 return jtag_execute_queue();
2098 int arm7_9_read_memory(struct target *target,
2104 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2105 struct arm *arm = &arm7_9->arm;
2107 uint32_t num_accesses = 0;
2108 int thisrun_accesses;
2114 LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "",
2115 address, size, count);
2117 if (target->state != TARGET_HALTED) {
2118 LOG_WARNING("target not halted");
2119 return ERROR_TARGET_NOT_HALTED;
2122 /* sanitize arguments */
2123 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
2124 return ERROR_COMMAND_SYNTAX_ERROR;
2126 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
2127 return ERROR_TARGET_UNALIGNED_ACCESS;
2129 /* load the base register with the address of the first word */
2131 arm7_9->write_core_regs(target, 0x1, reg);
2137 while (num_accesses < count) {
2140 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2141 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2143 if (last_reg <= thisrun_accesses)
2144 last_reg = thisrun_accesses;
2146 arm7_9->load_word_regs(target, reg_list);
2148 /* fast memory reads are only safe when the target is running
2149 * from a sufficiently high clock (32 kHz is usually too slow)
2151 if (arm7_9->fast_memory_access)
2152 retval = arm7_9_execute_fast_sys_speed(target);
2154 retval = arm7_9_execute_sys_speed(target);
2155 if (retval != ERROR_OK)
2158 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 4);
2160 /* advance buffer, count number of accesses */
2161 buffer += thisrun_accesses * 4;
2162 num_accesses += thisrun_accesses;
2164 if ((j++%1024) == 0)
2169 while (num_accesses < count) {
2172 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2173 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2175 for (i = 1; i <= thisrun_accesses; i++) {
2178 arm7_9->load_hword_reg(target, i);
2179 /* fast memory reads are only safe when the target is running
2180 * from a sufficiently high clock (32 kHz is usually too slow)
2182 if (arm7_9->fast_memory_access)
2183 retval = arm7_9_execute_fast_sys_speed(target);
2185 retval = arm7_9_execute_sys_speed(target);
2186 if (retval != ERROR_OK)
2191 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 2);
2193 /* advance buffer, count number of accesses */
2194 buffer += thisrun_accesses * 2;
2195 num_accesses += thisrun_accesses;
2197 if ((j++%1024) == 0)
2202 while (num_accesses < count) {
2205 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2206 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2208 for (i = 1; i <= thisrun_accesses; i++) {
2211 arm7_9->load_byte_reg(target, i);
2212 /* fast memory reads are only safe when the target is running
2213 * from a sufficiently high clock (32 kHz is usually too slow)
2215 if (arm7_9->fast_memory_access)
2216 retval = arm7_9_execute_fast_sys_speed(target);
2218 retval = arm7_9_execute_sys_speed(target);
2219 if (retval != ERROR_OK)
2223 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 1);
2225 /* advance buffer, count number of accesses */
2226 buffer += thisrun_accesses * 1;
2227 num_accesses += thisrun_accesses;
2229 if ((j++%1024) == 0)
2235 if (!is_arm_mode(arm->core_mode))
2238 for (i = 0; i <= last_reg; i++) {
2239 struct reg *r = arm_reg_current(arm, i);
2240 r->dirty = r->valid;
2243 arm7_9->read_xpsr(target, &cpsr, 0);
2244 retval = jtag_execute_queue();
2245 if (retval != ERROR_OK) {
2246 LOG_ERROR("JTAG error while reading cpsr");
2247 return ERROR_TARGET_DATA_ABORT;
2250 if (((cpsr & 0x1f) == ARM_MODE_ABT) && (arm->core_mode != ARM_MODE_ABT)) {
2252 "memory read caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")",
2257 arm7_9->write_xpsr_im8(target,
2258 buf_get_u32(arm->cpsr->value, 0, 8)
2261 return ERROR_TARGET_DATA_ABORT;
2267 int arm7_9_write_memory(struct target *target,
2271 const uint8_t *buffer)
2273 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2274 struct arm *arm = &arm7_9->arm;
2275 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
2278 uint32_t num_accesses = 0;
2279 int thisrun_accesses;
2285 #ifdef _DEBUG_ARM7_9_
2286 LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
2289 if (target->state != TARGET_HALTED) {
2290 LOG_WARNING("target not halted");
2291 return ERROR_TARGET_NOT_HALTED;
2294 /* sanitize arguments */
2295 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
2296 return ERROR_COMMAND_SYNTAX_ERROR;
2298 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
2299 return ERROR_TARGET_UNALIGNED_ACCESS;
2301 /* load the base register with the address of the first word */
2303 arm7_9->write_core_regs(target, 0x1, reg);
2305 /* Clear DBGACK, to make sure memory fetches work as expected */
2306 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
2307 embeddedice_store_reg(dbg_ctrl);
2311 while (num_accesses < count) {
2314 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2315 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2317 for (i = 1; i <= thisrun_accesses; i++) {
2320 reg[i] = target_buffer_get_u32(target, buffer);
2324 arm7_9->write_core_regs(target, reg_list, reg);
2326 arm7_9->store_word_regs(target, reg_list);
2328 /* fast memory writes are only safe when the target is running
2329 * from a sufficiently high clock (32 kHz is usually too slow)
2331 if (arm7_9->fast_memory_access)
2332 retval = arm7_9_execute_fast_sys_speed(target);
2334 retval = arm7_9_execute_sys_speed(target);
2337 * if memory writes are made when the clock is running slow
2338 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2339 * processor operations after a "reset halt" or "reset init",
2340 * need to immediately stroke the keep alive or will end up with
2341 * gdb "keep alive not sent error message" problem.
2347 if (retval != ERROR_OK)
2350 num_accesses += thisrun_accesses;
2354 while (num_accesses < count) {
2357 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2358 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2360 for (i = 1; i <= thisrun_accesses; i++) {
2363 reg[i] = target_buffer_get_u16(target, buffer) & 0xffff;
2367 arm7_9->write_core_regs(target, reg_list, reg);
2369 for (i = 1; i <= thisrun_accesses; i++) {
2370 arm7_9->store_hword_reg(target, i);
2372 /* fast memory writes are only safe when the target is running
2373 * from a sufficiently high clock (32 kHz is usually too slow)
2375 if (arm7_9->fast_memory_access)
2376 retval = arm7_9_execute_fast_sys_speed(target);
2378 retval = arm7_9_execute_sys_speed(target);
2381 * if memory writes are made when the clock is running slow
2382 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2383 * processor operations after a "reset halt" or "reset init",
2384 * need to immediately stroke the keep alive or will end up with
2385 * gdb "keep alive not sent error message" problem.
2391 if (retval != ERROR_OK)
2395 num_accesses += thisrun_accesses;
2399 while (num_accesses < count) {
2402 ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2403 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2405 for (i = 1; i <= thisrun_accesses; i++) {
2408 reg[i] = *buffer++ & 0xff;
2411 arm7_9->write_core_regs(target, reg_list, reg);
2413 for (i = 1; i <= thisrun_accesses; i++) {
2414 arm7_9->store_byte_reg(target, i);
2415 /* fast memory writes are only safe when the target is running
2416 * from a sufficiently high clock (32 kHz is usually too slow)
2418 if (arm7_9->fast_memory_access)
2419 retval = arm7_9_execute_fast_sys_speed(target);
2421 retval = arm7_9_execute_sys_speed(target);
2424 * if memory writes are made when the clock is running slow
2425 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2426 * processor operations after a "reset halt" or "reset init",
2427 * need to immediately stroke the keep alive or will end up with
2428 * gdb "keep alive not sent error message" problem.
2434 if (retval != ERROR_OK)
2439 num_accesses += thisrun_accesses;
2445 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
2446 embeddedice_store_reg(dbg_ctrl);
2448 if (!is_arm_mode(arm->core_mode))
2451 for (i = 0; i <= last_reg; i++) {
2452 struct reg *r = arm_reg_current(arm, i);
2453 r->dirty = r->valid;
2456 arm7_9->read_xpsr(target, &cpsr, 0);
2457 retval = jtag_execute_queue();
2458 if (retval != ERROR_OK) {
2459 LOG_ERROR("JTAG error while reading cpsr");
2460 return ERROR_TARGET_DATA_ABORT;
2463 if (((cpsr & 0x1f) == ARM_MODE_ABT) && (arm->core_mode != ARM_MODE_ABT)) {
2465 "memory write caused data abort (address: 0x%8.8" PRIx32 ", size: 0x%" PRIx32 ", count: 0x%" PRIx32 ")",
2470 arm7_9->write_xpsr_im8(target,
2471 buf_get_u32(arm->cpsr->value, 0, 8)
2474 return ERROR_TARGET_DATA_ABORT;
2480 int arm7_9_write_memory_opt(struct target *target,
2484 const uint8_t *buffer)
2486 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2489 if (size == 4 && count > 32 && arm7_9->bulk_write_memory) {
2490 /* Attempt to do a bulk write */
2491 retval = arm7_9->bulk_write_memory(target, address, count, buffer);
2493 if (retval == ERROR_OK)
2497 return arm7_9->write_memory(target, address, size, count, buffer);
2500 int arm7_9_write_memory_no_opt(struct target *target,
2504 const uint8_t *buffer)
2506 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2508 return arm7_9->write_memory(target, address, size, count, buffer);
2511 static int dcc_count;
2512 static const uint8_t *dcc_buffer;
2514 static int arm7_9_dcc_completion(struct target *target,
2515 uint32_t exit_point,
2519 int retval = ERROR_OK;
2520 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2522 retval = target_wait_state(target, TARGET_DEBUG_RUNNING, 500);
2523 if (retval != ERROR_OK)
2526 int little = target->endianness == TARGET_LITTLE_ENDIAN;
2527 int count = dcc_count;
2528 const uint8_t *buffer = dcc_buffer;
2530 /* Handle first & last using standard embeddedice_write_reg and the middle ones w/the
2531 * core function repeated. */
2532 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA],
2533 fast_target_buffer_get_u32(buffer, little));
2536 struct embeddedice_reg *ice_reg =
2537 arm7_9->eice_cache->reg_list[EICE_COMMS_DATA].arch_info;
2538 uint8_t reg_addr = ice_reg->addr & 0x1f;
2539 struct jtag_tap *tap;
2540 tap = ice_reg->jtag_info->tap;
2542 embeddedice_write_dcc(tap, reg_addr, buffer, little, count-2);
2543 buffer += (count-2)*4;
2545 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA],
2546 fast_target_buffer_get_u32(buffer, little));
2549 for (i = 0; i < count; i++) {
2550 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA],
2551 fast_target_buffer_get_u32(buffer, little));
2556 retval = target_halt(target);
2557 if (retval != ERROR_OK)
2559 return target_wait_state(target, TARGET_HALTED, 500);
2562 static const uint32_t dcc_code[] = {
2563 /* r0 == input, points to memory buffer
2567 /* spin until DCC control (c0) reports data arrived */
2568 0xee101e10, /* w: mrc p14, #0, r1, c0, c0 */
2569 0xe3110001, /* tst r1, #1 */
2570 0x0afffffc, /* bne w */
2572 /* read word from DCC (c1), write to memory */
2573 0xee111e10, /* mrc p14, #0, r1, c1, c0 */
2574 0xe4801004, /* str r1, [r0], #4 */
2577 0xeafffff9 /* b w */
2580 int arm7_9_bulk_write_memory(struct target *target,
2583 const uint8_t *buffer)
2586 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2588 if (address % 4 != 0)
2589 return ERROR_TARGET_UNALIGNED_ACCESS;
2591 if (!arm7_9->dcc_downloads)
2592 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2594 /* regrab previously allocated working_area, or allocate a new one */
2595 if (!arm7_9->dcc_working_area) {
2596 uint8_t dcc_code_buf[6 * 4];
2598 /* make sure we have a working area */
2599 if (target_alloc_working_area(target, 24, &arm7_9->dcc_working_area) != ERROR_OK) {
2600 LOG_INFO("no working area available, falling back to memory writes");
2601 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2604 /* copy target instructions to target endianness */
2605 target_buffer_set_u32_array(target, dcc_code_buf, ARRAY_SIZE(dcc_code), dcc_code);
2607 /* write DCC code to working area, using the non-optimized
2608 * memory write to avoid ending up here again */
2609 retval = arm7_9_write_memory_no_opt(target,
2610 arm7_9->dcc_working_area->address, 4, 6, dcc_code_buf);
2611 if (retval != ERROR_OK)
2615 struct arm_algorithm arm_algo;
2616 struct reg_param reg_params[1];
2618 arm_algo.common_magic = ARM_COMMON_MAGIC;
2619 arm_algo.core_mode = ARM_MODE_SVC;
2620 arm_algo.core_state = ARM_STATE_ARM;
2622 init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT);
2624 buf_set_u32(reg_params[0].value, 0, 32, address);
2627 dcc_buffer = buffer;
2628 retval = armv4_5_run_algorithm_inner(target, 0, NULL, 1, reg_params,
2629 arm7_9->dcc_working_area->address,
2630 arm7_9->dcc_working_area->address + 6*4,
2631 20*1000, &arm_algo, arm7_9_dcc_completion);
2633 if (retval == ERROR_OK) {
2634 uint32_t endaddress = buf_get_u32(reg_params[0].value, 0, 32);
2635 if (endaddress != (address + count*4)) {
2637 "DCC write failed, expected end address 0x%08" PRIx32 " got 0x%0" PRIx32 "",
2638 (address + count*4),
2640 retval = ERROR_FAIL;
2644 destroy_reg_param(®_params[0]);
2650 * Perform per-target setup that requires JTAG access.
2652 int arm7_9_examine(struct target *target)
2654 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2657 if (!target_was_examined(target)) {
2658 struct reg_cache *t, **cache_p;
2660 t = embeddedice_build_reg_cache(target, arm7_9);
2664 cache_p = register_get_last_cache_p(&target->reg_cache);
2666 arm7_9->eice_cache = (*cache_p);
2668 if (arm7_9->arm.etm)
2669 (*cache_p)->next = etm_build_reg_cache(target,
2673 target_set_examined(target);
2676 retval = embeddedice_setup(target);
2677 if (retval == ERROR_OK)
2678 retval = arm7_9_setup(target);
2679 if (retval == ERROR_OK && arm7_9->arm.etm)
2680 retval = etm_setup(target);
2685 int arm7_9_check_reset(struct target *target)
2687 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2689 if (get_target_reset_nag() && !arm7_9->dcc_downloads)
2691 "NOTE! DCC downloads have not been enabled, defaulting to slow memory writes. Type 'help dcc'.");
2693 if (get_target_reset_nag() && (target->working_area_size == 0))
2694 LOG_WARNING("NOTE! Severe performance degradation without working memory enabled.");
2696 if (get_target_reset_nag() && !arm7_9->fast_memory_access)
2698 "NOTE! Severe performance degradation without fast memory access enabled. Type 'help fast'.");
2703 int arm7_9_endianness_callback(jtag_callback_data_t pu8_in,
2704 jtag_callback_data_t i_size, jtag_callback_data_t i_be,
2705 jtag_callback_data_t i_flip)
2707 uint8_t *in = (uint8_t *)pu8_in;
2708 int size = (int)i_size;
2710 int flip = (int)i_flip;
2715 readback = le_to_h_u32(in);
2717 readback = flip_u32(readback, 32);
2719 h_u32_to_be(in, readback);
2721 h_u32_to_le(in, readback);
2724 readback = le_to_h_u16(in);
2726 readback = flip_u32(readback, 16);
2728 h_u16_to_be(in, readback & 0xffff);
2730 h_u16_to_le(in, readback & 0xffff);
2735 readback = flip_u32(readback, 8);
2736 *in = readback & 0xff;
2743 COMMAND_HANDLER(handle_arm7_9_dbgrq_command)
2745 struct target *target = get_current_target(CMD_CTX);
2746 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2748 if (!is_arm7_9(arm7_9)) {
2749 command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
2750 return ERROR_TARGET_INVALID;
2754 COMMAND_PARSE_ENABLE(CMD_ARGV[0], arm7_9->use_dbgrq);
2756 command_print(CMD_CTX,
2757 "use of EmbeddedICE dbgrq instead of breakpoint for target halt %s",
2758 (arm7_9->use_dbgrq) ? "enabled" : "disabled");
2763 COMMAND_HANDLER(handle_arm7_9_fast_memory_access_command)
2765 struct target *target = get_current_target(CMD_CTX);
2766 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2768 if (!is_arm7_9(arm7_9)) {
2769 command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
2770 return ERROR_TARGET_INVALID;
2774 COMMAND_PARSE_ENABLE(CMD_ARGV[0], arm7_9->fast_memory_access);
2776 command_print(CMD_CTX,
2777 "fast memory access is %s",
2778 (arm7_9->fast_memory_access) ? "enabled" : "disabled");
2783 COMMAND_HANDLER(handle_arm7_9_dcc_downloads_command)
2785 struct target *target = get_current_target(CMD_CTX);
2786 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2788 if (!is_arm7_9(arm7_9)) {
2789 command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
2790 return ERROR_TARGET_INVALID;
2794 COMMAND_PARSE_ENABLE(CMD_ARGV[0], arm7_9->dcc_downloads);
2796 command_print(CMD_CTX,
2797 "dcc downloads are %s",
2798 (arm7_9->dcc_downloads) ? "enabled" : "disabled");
2803 static int arm7_9_setup_semihosting(struct target *target, int enable)
2805 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
2807 if (!is_arm7_9(arm7_9)) {
2808 LOG_USER("current target isn't an ARM7/ARM9 target");
2809 return ERROR_TARGET_INVALID;
2812 if (arm7_9->has_vector_catch) {
2813 struct reg *vector_catch = &arm7_9->eice_cache
2814 ->reg_list[EICE_VEC_CATCH];
2816 if (!vector_catch->valid)
2817 embeddedice_read_reg(vector_catch);
2818 buf_set_u32(vector_catch->value, 2, 1, enable);
2819 embeddedice_store_reg(vector_catch);
2821 /* TODO: allow optional high vectors and/or BKPT_HARD */
2823 breakpoint_add(target, 8, 4, BKPT_SOFT);
2825 breakpoint_remove(target, 8);
2831 int arm7_9_init_arch_info(struct target *target, struct arm7_9_common *arm7_9)
2833 int retval = ERROR_OK;
2834 struct arm *arm = &arm7_9->arm;
2836 arm7_9->common_magic = ARM7_9_COMMON_MAGIC;
2838 retval = arm_jtag_setup_connection(&arm7_9->jtag_info);
2839 if (retval != ERROR_OK)
2842 /* caller must have allocated via calloc(), so everything's zeroed */
2844 arm7_9->wp_available_max = 2;
2846 arm7_9->fast_memory_access = false;
2847 arm7_9->dcc_downloads = false;
2849 arm->arch_info = arm7_9;
2850 arm->core_type = ARM_MODE_ANY;
2851 arm->read_core_reg = arm7_9_read_core_reg;
2852 arm->write_core_reg = arm7_9_write_core_reg;
2853 arm->full_context = arm7_9_full_context;
2854 arm->setup_semihosting = arm7_9_setup_semihosting;
2856 retval = arm_init_arch_info(target, arm);
2857 if (retval != ERROR_OK)
2860 return target_register_timer_callback(arm7_9_handle_target_request,
2864 static const struct command_registration arm7_9_any_command_handlers[] = {
2867 .handler = handle_arm7_9_dbgrq_command,
2868 .mode = COMMAND_ANY,
2869 .usage = "['enable'|'disable']",
2870 .help = "use EmbeddedICE dbgrq instead of breakpoint "
2871 "for target halt requests",
2874 "fast_memory_access",
2875 .handler = handle_arm7_9_fast_memory_access_command,
2876 .mode = COMMAND_ANY,
2877 .usage = "['enable'|'disable']",
2878 .help = "use fast memory accesses instead of slower "
2879 "but potentially safer accesses",
2883 .handler = handle_arm7_9_dcc_downloads_command,
2884 .mode = COMMAND_ANY,
2885 .usage = "['enable'|'disable']",
2886 .help = "use DCC downloads for larger memory writes",
2888 COMMAND_REGISTRATION_DONE
2890 const struct command_registration arm7_9_command_handlers[] = {
2892 .chain = arm_command_handlers,
2895 .chain = etm_command_handlers,
2899 .mode = COMMAND_ANY,
2900 .help = "arm7/9 specific commands",
2902 .chain = arm7_9_any_command_handlers,
2904 COMMAND_REGISTRATION_DONE