1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2009 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 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
30 ***************************************************************************/
35 #include "breakpoints.h"
36 #include "embeddedice.h"
37 #include "target_request.h"
39 #include <helper/time_support.h>
40 #include "arm_simulator.h"
41 #include "arm_semihosting.h"
42 #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
)
100 arm7_9
->wp_available
--;
102 else if (!arm7_9
->wp1_used
)
104 arm7_9
->wp1_used
= 1;
106 arm7_9
->wp_available
--;
110 LOG_ERROR("BUG: no hardware comparator available");
112 LOG_DEBUG("BPID: %d (0x%08" PRIx32
") using hw wp: %d",
113 breakpoint
->unique_id
,
119 * Setup an ARM7/9 target's embedded ICE registers for software breakpoints.
121 * @param arm7_9 Pointer to common struct for ARM7/9 targets
122 * @return Error codes if there is a problem finding a watchpoint or the result
123 * of executing the JTAG queue
125 static int arm7_9_set_software_breakpoints(struct arm7_9_common
*arm7_9
)
127 if (arm7_9
->sw_breakpoints_added
)
131 if (arm7_9
->wp_available
< 1)
133 LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
134 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
136 arm7_9
->wp_available
--;
138 /* pick a breakpoint unit */
139 if (!arm7_9
->wp0_used
)
141 arm7_9
->sw_breakpoints_added
= 1;
142 arm7_9
->wp0_used
= 3;
143 } else if (!arm7_9
->wp1_used
)
145 arm7_9
->sw_breakpoints_added
= 2;
146 arm7_9
->wp1_used
= 3;
150 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
154 if (arm7_9
->sw_breakpoints_added
== 1)
156 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_VALUE
], arm7_9
->arm_bkpt
);
157 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], 0x0);
158 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], 0xffffffffu
);
159 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
160 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
162 else if (arm7_9
->sw_breakpoints_added
== 2)
164 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_VALUE
], arm7_9
->arm_bkpt
);
165 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
], 0x0);
166 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
], 0xffffffffu
);
167 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
168 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
172 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
175 LOG_DEBUG("SW BP using hw wp: %d",
176 arm7_9
->sw_breakpoints_added
);
178 return jtag_execute_queue();
182 * Setup the common pieces for an ARM7/9 target after reset or on startup.
184 * @param target Pointer to an ARM7/9 target to setup
185 * @return Result of clearing the watchpoints on the target
187 static int arm7_9_setup(struct target
*target
)
189 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
191 return arm7_9_clear_watchpoints(arm7_9
);
195 * Set either a hardware or software breakpoint on an ARM7/9 target. The
196 * breakpoint is set up even if it is already set. Some actions, e.g. reset,
197 * might have erased the values in Embedded ICE.
199 * @param target Pointer to the target device to set the breakpoints on
200 * @param breakpoint Pointer to the breakpoint to be set
201 * @return For hardware breakpoints, this is the result of executing the JTAG
202 * queue. For software breakpoints, this will be the status of the
203 * required memory reads and writes
205 static int arm7_9_set_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
207 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
208 int retval
= ERROR_OK
;
210 LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32
", Type: %d" ,
211 breakpoint
->unique_id
,
215 if (target
->state
!= TARGET_HALTED
)
217 LOG_WARNING("target not halted");
218 return ERROR_TARGET_NOT_HALTED
;
221 if (breakpoint
->type
== BKPT_HARD
)
223 /* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
224 uint32_t mask
= (breakpoint
->length
== 4) ? 0x3u
: 0x1u
;
226 /* reassign a hw breakpoint */
227 if (breakpoint
->set
== 0)
229 arm7_9_assign_wp(arm7_9
, breakpoint
);
232 if (breakpoint
->set
== 1)
234 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_VALUE
], breakpoint
->address
);
235 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], mask
);
236 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], 0xffffffffu
);
237 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
238 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
240 else if (breakpoint
->set
== 2)
242 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_VALUE
], breakpoint
->address
);
243 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
], mask
);
244 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
], 0xffffffffu
);
245 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
246 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
250 LOG_ERROR("BUG: no hardware comparator available");
254 retval
= jtag_execute_queue();
256 else if (breakpoint
->type
== BKPT_SOFT
)
258 /* did we already set this breakpoint? */
262 if (breakpoint
->length
== 4)
264 uint32_t verify
= 0xffffffff;
265 /* keep the original instruction in target endianness */
266 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
270 /* write the breakpoint instruction in target endianness (arm7_9->arm_bkpt is host endian) */
271 if ((retval
= target_write_u32(target
, breakpoint
->address
, arm7_9
->arm_bkpt
)) != ERROR_OK
)
276 if ((retval
= target_read_u32(target
, breakpoint
->address
, &verify
)) != ERROR_OK
)
280 if (verify
!= arm7_9
->arm_bkpt
)
282 LOG_ERROR("Unable to set 32 bit software breakpoint at address %08" PRIx32
" - check that memory is read/writable", breakpoint
->address
);
288 uint16_t verify
= 0xffff;
289 /* keep the original instruction in target endianness */
290 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
294 /* write the breakpoint instruction in target endianness (arm7_9->thumb_bkpt is host endian) */
295 if ((retval
= target_write_u16(target
, breakpoint
->address
, arm7_9
->thumb_bkpt
)) != ERROR_OK
)
300 if ((retval
= target_read_u16(target
, breakpoint
->address
, &verify
)) != ERROR_OK
)
304 if (verify
!= arm7_9
->thumb_bkpt
)
306 LOG_ERROR("Unable to set thumb software breakpoint at address %08" PRIx32
" - check that memory is read/writable", breakpoint
->address
);
311 if ((retval
= arm7_9_set_software_breakpoints(arm7_9
)) != ERROR_OK
)
314 arm7_9
->sw_breakpoint_count
++;
323 * Unsets an existing breakpoint on an ARM7/9 target. If it is a hardware
324 * breakpoint, the watchpoint used will be freed and the Embedded ICE registers
325 * will be updated. Otherwise, the software breakpoint will be restored to its
326 * original instruction if it hasn't already been modified.
328 * @param target Pointer to ARM7/9 target to unset the breakpoint from
329 * @param breakpoint Pointer to breakpoint to be unset
330 * @return For hardware breakpoints, this is the result of executing the JTAG
331 * queue. For software breakpoints, this will be the status of the
332 * required memory reads and writes
334 static int arm7_9_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
336 int retval
= ERROR_OK
;
337 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
339 LOG_DEBUG("BPID: %d, Address: 0x%08" PRIx32
,
340 breakpoint
->unique_id
,
341 breakpoint
->address
);
343 if (!breakpoint
->set
)
345 LOG_WARNING("breakpoint not set");
349 if (breakpoint
->type
== BKPT_HARD
)
351 LOG_DEBUG("BPID: %d Releasing hw wp: %d",
352 breakpoint
->unique_id
,
354 if (breakpoint
->set
== 1)
356 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], 0x0);
357 arm7_9
->wp0_used
= 0;
358 arm7_9
->wp_available
++;
360 else if (breakpoint
->set
== 2)
362 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], 0x0);
363 arm7_9
->wp1_used
= 0;
364 arm7_9
->wp_available
++;
366 retval
= jtag_execute_queue();
371 /* restore original instruction (kept in target endianness) */
372 if (breakpoint
->length
== 4)
374 uint32_t current_instr
;
375 /* check that user program as not modified breakpoint instruction */
376 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, (uint8_t*)¤t_instr
)) != ERROR_OK
)
380 current_instr
= target_buffer_get_u32(target
, (uint8_t *)¤t_instr
);
381 if (current_instr
== arm7_9
->arm_bkpt
)
382 if ((retval
= target_write_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
389 uint16_t current_instr
;
390 /* check that user program as not modified breakpoint instruction */
391 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, (uint8_t*)¤t_instr
)) != ERROR_OK
)
395 if (current_instr
== arm7_9
->thumb_bkpt
)
396 if ((retval
= target_write_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
402 if (--arm7_9
->sw_breakpoint_count
==0)
404 /* We have removed the last sw breakpoint, clear the hw breakpoint we used to implement it */
405 if (arm7_9
->sw_breakpoints_added
== 1)
407 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], 0);
409 else if (arm7_9
->sw_breakpoints_added
== 2)
411 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], 0);
422 * Add a breakpoint to an ARM7/9 target. This makes sure that there are no
423 * dangling breakpoints and that the desired breakpoint can be added.
425 * @param target Pointer to the target ARM7/9 device to add a breakpoint to
426 * @param breakpoint Pointer to the breakpoint to be added
427 * @return An error status if there is a problem adding the breakpoint or the
428 * result of setting the breakpoint
430 int arm7_9_add_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
432 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
434 if (arm7_9
->breakpoint_count
== 0)
436 /* make sure we don't have any dangling breakpoints. This is vital upon
437 * GDB connect/disconnect
439 arm7_9_clear_watchpoints(arm7_9
);
442 if ((breakpoint
->type
== BKPT_HARD
) && (arm7_9
->wp_available
< 1))
444 LOG_INFO("no watchpoint unit available for hardware breakpoint");
445 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
448 if ((breakpoint
->length
!= 2) && (breakpoint
->length
!= 4))
450 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
451 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
454 if (breakpoint
->type
== BKPT_HARD
)
456 arm7_9_assign_wp(arm7_9
, breakpoint
);
459 arm7_9
->breakpoint_count
++;
461 return arm7_9_set_breakpoint(target
, breakpoint
);
465 * Removes a breakpoint from an ARM7/9 target. This will make sure there are no
466 * dangling breakpoints and updates available watchpoints if it is a hardware
469 * @param target Pointer to the target to have a breakpoint removed
470 * @param breakpoint Pointer to the breakpoint to be removed
471 * @return Error status if there was a problem unsetting the breakpoint or the
472 * watchpoints could not be cleared
474 int arm7_9_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
476 int retval
= ERROR_OK
;
477 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
479 if ((retval
= arm7_9_unset_breakpoint(target
, breakpoint
)) != ERROR_OK
)
484 if (breakpoint
->type
== BKPT_HARD
)
485 arm7_9
->wp_available
++;
487 arm7_9
->breakpoint_count
--;
488 if (arm7_9
->breakpoint_count
== 0)
490 /* make sure we don't have any dangling breakpoints */
491 if ((retval
= arm7_9_clear_watchpoints(arm7_9
)) != ERROR_OK
)
501 * Sets a watchpoint for an ARM7/9 target in one of the watchpoint units. It is
502 * considered a bug to call this function when there are no available watchpoint
505 * @param target Pointer to an ARM7/9 target to set a watchpoint on
506 * @param watchpoint Pointer to the watchpoint to be set
507 * @return Error status if watchpoint set fails or the result of executing the
510 static int arm7_9_set_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
512 int retval
= ERROR_OK
;
513 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
517 mask
= watchpoint
->length
- 1;
519 if (target
->state
!= TARGET_HALTED
)
521 LOG_WARNING("target not halted");
522 return ERROR_TARGET_NOT_HALTED
;
525 if (watchpoint
->rw
== WPT_ACCESS
)
530 if (!arm7_9
->wp0_used
)
532 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_VALUE
], watchpoint
->address
);
533 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], mask
);
534 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], watchpoint
->mask
);
535 if (watchpoint
->mask
!= 0xffffffffu
)
536 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_VALUE
], watchpoint
->value
);
537 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], 0xff & ~EICE_W_CTRL_nOPC
& ~rw_mask
);
538 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
| EICE_W_CTRL_nOPC
| (watchpoint
->rw
& 1));
540 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
545 arm7_9
->wp0_used
= 2;
547 else if (!arm7_9
->wp1_used
)
549 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_VALUE
], watchpoint
->address
);
550 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
], mask
);
551 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
], watchpoint
->mask
);
552 if (watchpoint
->mask
!= 0xffffffffu
)
553 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_VALUE
], watchpoint
->value
);
554 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
], 0xff & ~EICE_W_CTRL_nOPC
& ~rw_mask
);
555 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
| EICE_W_CTRL_nOPC
| (watchpoint
->rw
& 1));
557 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
562 arm7_9
->wp1_used
= 2;
566 LOG_ERROR("BUG: no hardware comparator available");
574 * Unset an existing watchpoint and clear the used watchpoint unit.
576 * @param target Pointer to the target to have the watchpoint removed
577 * @param watchpoint Pointer to the watchpoint to be removed
578 * @return Error status while trying to unset the watchpoint or the result of
579 * executing the JTAG queue
581 static int arm7_9_unset_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
583 int retval
= ERROR_OK
;
584 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
586 if (target
->state
!= TARGET_HALTED
)
588 LOG_WARNING("target not halted");
589 return ERROR_TARGET_NOT_HALTED
;
592 if (!watchpoint
->set
)
594 LOG_WARNING("breakpoint not set");
598 if (watchpoint
->set
== 1)
600 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], 0x0);
601 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
605 arm7_9
->wp0_used
= 0;
607 else if (watchpoint
->set
== 2)
609 embeddedice_set_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], 0x0);
610 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
614 arm7_9
->wp1_used
= 0;
622 * Add a watchpoint to an ARM7/9 target. If there are no watchpoint units
623 * available, an error response is returned.
625 * @param target Pointer to the ARM7/9 target to add a watchpoint to
626 * @param watchpoint Pointer to the watchpoint to be added
627 * @return Error status while trying to add the watchpoint
629 int arm7_9_add_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
631 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
633 if (arm7_9
->wp_available
< 1)
635 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
638 if ((watchpoint
->length
!= 1) && (watchpoint
->length
!= 2) && (watchpoint
->length
!= 4))
640 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
643 arm7_9
->wp_available
--;
649 * Remove a watchpoint from an ARM7/9 target. The watchpoint will be unset and
650 * the used watchpoint unit will be reopened.
652 * @param target Pointer to the target to remove a watchpoint from
653 * @param watchpoint Pointer to the watchpoint to be removed
654 * @return Result of trying to unset the watchpoint
656 int arm7_9_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
658 int retval
= ERROR_OK
;
659 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
663 if ((retval
= arm7_9_unset_watchpoint(target
, watchpoint
)) != ERROR_OK
)
669 arm7_9
->wp_available
++;
675 * Restarts the target by sending a RESTART instruction and moving the JTAG
676 * state to IDLE. This includes a timeout waiting for DBGACK and SYSCOMP to be
677 * asserted by the processor.
679 * @param target Pointer to target to issue commands to
680 * @return Error status if there is a timeout or a problem while executing the
683 int arm7_9_execute_sys_speed(struct target
*target
)
686 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
687 struct arm_jtag
*jtag_info
= &arm7_9
->jtag_info
;
688 struct reg
*dbg_stat
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_STAT
];
690 /* set RESTART instruction */
691 if (arm7_9
->need_bypass_before_restart
) {
692 arm7_9
->need_bypass_before_restart
= 0;
693 arm_jtag_set_instr(jtag_info
, 0xf, NULL
, TAP_IDLE
);
695 arm_jtag_set_instr(jtag_info
, 0x4, NULL
, TAP_IDLE
);
697 long long then
= timeval_ms();
699 while (!(timeout
= ((timeval_ms()-then
) > 1000)))
701 /* read debug status register */
702 embeddedice_read_reg(dbg_stat
);
703 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
705 if ((buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_DBGACK
, 1))
706 && (buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_SYSCOMP
, 1)))
708 if (debug_level
>= 3)
718 LOG_ERROR("timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: %" PRIx32
"", buf_get_u32(dbg_stat
->value
, 0, dbg_stat
->size
));
719 return ERROR_TARGET_TIMEOUT
;
726 * Restarts the target by sending a RESTART instruction and moving the JTAG
727 * state to IDLE. This validates that DBGACK and SYSCOMP are set without
728 * waiting until they are.
730 * @param target Pointer to the target to issue commands to
731 * @return Always ERROR_OK
733 static int arm7_9_execute_fast_sys_speed(struct target
*target
)
736 static uint8_t check_value
[4], check_mask
[4];
738 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
739 struct arm_jtag
*jtag_info
= &arm7_9
->jtag_info
;
740 struct reg
*dbg_stat
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_STAT
];
742 /* set RESTART instruction */
743 if (arm7_9
->need_bypass_before_restart
) {
744 arm7_9
->need_bypass_before_restart
= 0;
745 arm_jtag_set_instr(jtag_info
, 0xf, NULL
, TAP_IDLE
);
747 arm_jtag_set_instr(jtag_info
, 0x4, NULL
, TAP_IDLE
);
751 /* check for DBGACK and SYSCOMP set (others don't care) */
753 /* NB! These are constants that must be available until after next jtag_execute() and
754 * we evaluate the values upon first execution in lieu of setting up these constants
755 * during early setup.
757 buf_set_u32(check_value
, 0, 32, 0x9);
758 buf_set_u32(check_mask
, 0, 32, 0x9);
762 /* read debug status register */
763 embeddedice_read_reg_w_check(dbg_stat
, check_value
, check_mask
);
769 * Get some data from the ARM7/9 target.
771 * @param target Pointer to the ARM7/9 target to read data from
772 * @param size The number of 32bit words to be read
773 * @param buffer Pointer to the buffer that will hold the data
774 * @return The result of receiving data from the Embedded ICE unit
776 int arm7_9_target_request_data(struct target
*target
, uint32_t size
, uint8_t *buffer
)
778 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
779 struct arm_jtag
*jtag_info
= &arm7_9
->jtag_info
;
781 int retval
= ERROR_OK
;
784 data
= malloc(size
* (sizeof(uint32_t)));
786 retval
= embeddedice_receive(jtag_info
, data
, size
);
788 /* return the 32-bit ints in the 8-bit array */
789 for (i
= 0; i
< size
; i
++)
791 h_u32_to_le(buffer
+ (i
* 4), data
[i
]);
800 * Handles requests to an ARM7/9 target. If debug messaging is enabled, the
801 * target is running and the DCC control register has the W bit high, this will
802 * execute the request on the target.
804 * @param priv Void pointer expected to be a struct target pointer
805 * @return ERROR_OK unless there are issues with the JTAG queue or when reading
806 * from the Embedded ICE unit
808 static int arm7_9_handle_target_request(void *priv
)
810 int retval
= ERROR_OK
;
811 struct target
*target
= priv
;
812 if (!target_was_examined(target
))
814 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
815 struct arm_jtag
*jtag_info
= &arm7_9
->jtag_info
;
816 struct reg
*dcc_control
= &arm7_9
->eice_cache
->reg_list
[EICE_COMMS_CTRL
];
818 if (!target
->dbg_msg_enabled
)
821 if (target
->state
== TARGET_RUNNING
)
823 /* read DCC control register */
824 embeddedice_read_reg(dcc_control
);
825 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
831 if (buf_get_u32(dcc_control
->value
, 1, 1) == 1)
835 if ((retval
= embeddedice_receive(jtag_info
, &request
, 1)) != ERROR_OK
)
839 if ((retval
= target_request(target
, request
)) != ERROR_OK
)
850 * Polls an ARM7/9 target for its current status. If DBGACK is set, the target
851 * is manipulated to the right halted state based on its current state. This is
855 * <tr><th > State</th><th > Action</th></tr>
856 * <tr><td > TARGET_RUNNING | TARGET_RESET</td><td > Enters debug mode. If TARGET_RESET, pc may be checked</td></tr>
857 * <tr><td > TARGET_UNKNOWN</td><td > Warning is logged</td></tr>
858 * <tr><td > TARGET_DEBUG_RUNNING</td><td > Enters debug mode</td></tr>
859 * <tr><td > TARGET_HALTED</td><td > Nothing</td></tr>
862 * If the target does not end up in the halted state, a warning is produced. If
863 * DBGACK is cleared, then the target is expected to either be running or
866 * @param target Pointer to the ARM7/9 target to poll
867 * @return ERROR_OK or an error status if a command fails
869 int arm7_9_poll(struct target
*target
)
872 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
873 struct reg
*dbg_stat
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_STAT
];
875 /* read debug status register */
876 embeddedice_read_reg(dbg_stat
);
877 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
882 if (buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_DBGACK
, 1))
884 /* LOG_DEBUG("DBGACK set, dbg_state->value: 0x%x", buf_get_u32(dbg_stat->value, 0, 32));*/
885 if (target
->state
== TARGET_UNKNOWN
)
887 /* Starting OpenOCD with target in debug-halt */
888 target
->state
= TARGET_RUNNING
;
889 LOG_DEBUG("DBGACK already set during server startup.");
891 if ((target
->state
== TARGET_RUNNING
) || (target
->state
== TARGET_RESET
))
893 target
->state
= TARGET_HALTED
;
895 if ((retval
= arm7_9_debug_entry(target
)) != ERROR_OK
)
898 if (arm_semihosting(target
, &retval
) != 0)
901 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_HALTED
)) != ERROR_OK
)
906 if (target
->state
== TARGET_DEBUG_RUNNING
)
908 target
->state
= TARGET_HALTED
;
909 if ((retval
= arm7_9_debug_entry(target
)) != ERROR_OK
)
912 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
)) != ERROR_OK
)
917 if (target
->state
!= TARGET_HALTED
)
919 LOG_WARNING("DBGACK set, but the target did not end up in the halted state %d", target
->state
);
924 if (target
->state
!= TARGET_DEBUG_RUNNING
)
925 target
->state
= TARGET_RUNNING
;
932 * Asserts the reset (SRST) on an ARM7/9 target. Some -S targets (ARM966E-S in
933 * the STR912 isn't affected, ARM926EJ-S in the LPC3180 and AT91SAM9260 is
934 * affected) completely stop the JTAG clock while the core is held in reset
935 * (SRST). It isn't possible to program the halt condition once reset is
936 * asserted, hence a hook that allows the target to set up its reset-halt
937 * condition is setup prior to asserting reset.
939 * @param target Pointer to an ARM7/9 target to assert reset on
940 * @return ERROR_FAIL if the JTAG device does not have SRST, otherwise ERROR_OK
942 int arm7_9_assert_reset(struct target
*target
)
944 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
945 enum reset_types jtag_reset_config
= jtag_get_reset_config();
946 bool use_event
= false;
948 LOG_DEBUG("target->state: %s",
949 target_state_name(target
));
951 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
))
953 else if (!(jtag_reset_config
& RESET_HAS_SRST
)) {
954 LOG_ERROR("%s: how to reset?", target_name(target
));
958 /* At this point trst has been asserted/deasserted once. We would
959 * like to program EmbeddedICE while SRST is asserted, instead of
960 * depending on SRST to leave that module alone. However, many CPUs
961 * gate the JTAG clock while SRST is asserted; or JTAG may need
962 * clock stability guarantees (adaptive clocking might help).
964 * So we assume JTAG access during SRST is off the menu unless it's
965 * been specifically enabled.
967 bool srst_asserted
= false;
970 && !(jtag_reset_config
& RESET_SRST_PULLS_TRST
)
971 && (jtag_reset_config
& RESET_SRST_NO_GATING
))
973 jtag_add_reset(0, 1);
974 srst_asserted
= true;
977 if (target
->reset_halt
)
980 * For targets that don't support communication while SRST is
981 * asserted, we need to set up the reset vector catch first.
983 * When we use TRST+SRST and that's equivalent to a power-up
984 * reset, these settings may well be reset anyway; so setting
985 * them here won't matter.
987 if (arm7_9
->has_vector_catch
)
989 /* program vector catch register to catch reset */
990 embeddedice_write_reg(&arm7_9
->eice_cache
991 ->reg_list
[EICE_VEC_CATCH
], 0x1);
993 /* extra runtest added as issues were found with
994 * certain ARM9 cores (maybe more) - AT91SAM9260
997 jtag_add_runtest(1, TAP_IDLE
);
1001 /* program watchpoint unit to match on reset vector
1004 embeddedice_write_reg(&arm7_9
->eice_cache
1005 ->reg_list
[EICE_W0_ADDR_VALUE
], 0x0);
1006 embeddedice_write_reg(&arm7_9
->eice_cache
1007 ->reg_list
[EICE_W0_ADDR_MASK
], 0x3);
1008 embeddedice_write_reg(&arm7_9
->eice_cache
1009 ->reg_list
[EICE_W0_DATA_MASK
],
1011 embeddedice_write_reg(&arm7_9
->eice_cache
1012 ->reg_list
[EICE_W0_CONTROL_VALUE
],
1013 EICE_W_CTRL_ENABLE
);
1014 embeddedice_write_reg(&arm7_9
->eice_cache
1015 ->reg_list
[EICE_W0_CONTROL_MASK
],
1016 ~EICE_W_CTRL_nOPC
& 0xff);
1021 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1023 /* If we use SRST ... we'd like to issue just SRST, but the
1024 * board or chip may be set up so we have to assert TRST as
1025 * well. On some chips that combination is equivalent to a
1026 * power-up reset, and generally clobbers EICE state.
1028 if (jtag_reset_config
& RESET_SRST_PULLS_TRST
)
1029 jtag_add_reset(1, 1);
1030 else if (!srst_asserted
)
1031 jtag_add_reset(0, 1);
1032 jtag_add_sleep(50000);
1035 target
->state
= TARGET_RESET
;
1036 register_cache_invalidate(arm7_9
->armv4_5_common
.core_cache
);
1038 /* REVISIT why isn't standard debug entry logic sufficient?? */
1039 if (target
->reset_halt
1040 && (!(jtag_reset_config
& RESET_SRST_PULLS_TRST
)
1043 /* debug entry was prepared above */
1044 target
->debug_reason
= DBG_REASON_DBGRQ
;
1051 * Deassert the reset (SRST) signal on an ARM7/9 target. If SRST pulls TRST
1052 * and the target is being reset into a halt, a warning will be triggered
1053 * because it is not possible to reset into a halted mode in this case. The
1054 * target is halted using the target's functions.
1056 * @param target Pointer to the target to have the reset deasserted
1057 * @return ERROR_OK or an error from polling or halting the target
1059 int arm7_9_deassert_reset(struct target
*target
)
1061 int retval
= ERROR_OK
;
1062 LOG_DEBUG("target->state: %s",
1063 target_state_name(target
));
1065 /* deassert reset lines */
1066 jtag_add_reset(0, 0);
1068 enum reset_types jtag_reset_config
= jtag_get_reset_config();
1069 if (target
->reset_halt
&& (jtag_reset_config
& RESET_SRST_PULLS_TRST
) != 0)
1071 LOG_WARNING("srst pulls trst - can not reset into halted mode. Issuing halt after reset.");
1072 /* set up embedded ice registers again */
1073 if ((retval
= target_examine_one(target
)) != ERROR_OK
)
1076 if ((retval
= target_poll(target
)) != ERROR_OK
)
1081 if ((retval
= target_halt(target
)) != ERROR_OK
)
1091 * Clears the halt condition for an ARM7/9 target. If it isn't coming out of
1092 * reset and if DBGRQ is used, it is progammed to be deasserted. If the reset
1093 * vector catch was used, it is restored. Otherwise, the control value is
1094 * restored and the watchpoint unit is restored if it was in use.
1096 * @param target Pointer to the ARM7/9 target to have halt cleared
1097 * @return Always ERROR_OK
1099 static int arm7_9_clear_halt(struct target
*target
)
1101 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1102 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
1104 /* we used DBGRQ only if we didn't come out of reset */
1105 if (!arm7_9
->debug_entry_from_reset
&& arm7_9
->use_dbgrq
)
1107 /* program EmbeddedICE Debug Control Register to deassert DBGRQ
1109 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGRQ
, 1, 0);
1110 embeddedice_store_reg(dbg_ctrl
);
1114 if (arm7_9
->debug_entry_from_reset
&& arm7_9
->has_vector_catch
)
1116 /* if we came out of reset, and vector catch is supported, we used
1117 * vector catch to enter debug state
1118 * restore the register in that case
1120 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_VEC_CATCH
]);
1124 /* restore registers if watchpoint unit 0 was in use
1126 if (arm7_9
->wp0_used
)
1128 if (arm7_9
->debug_entry_from_reset
)
1130 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_VALUE
]);
1132 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
]);
1133 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
]);
1134 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
]);
1136 /* control value always has to be restored, as it was either disabled,
1137 * or enabled with possibly different bits
1139 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
]);
1147 * Issue a software reset and halt to an ARM7/9 target. The target is halted
1148 * and then there is a wait until the processor shows the halt. This wait can
1149 * timeout and results in an error being returned. The software reset involves
1150 * clearing the halt, updating the debug control register, changing to ARM mode,
1151 * reset of the program counter, and reset of all of the registers.
1153 * @param target Pointer to the ARM7/9 target to be reset and halted by software
1154 * @return Error status if any of the commands fail, otherwise ERROR_OK
1156 int arm7_9_soft_reset_halt(struct target
*target
)
1158 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1159 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1160 struct reg
*dbg_stat
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_STAT
];
1161 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
1165 /* FIX!!! replace some of this code with tcl commands
1167 * halt # the halt command is synchronous
1168 * armv4_5 core_state arm
1172 if ((retval
= target_halt(target
)) != ERROR_OK
)
1175 long long then
= timeval_ms();
1177 while (!(timeout
= ((timeval_ms()-then
) > 1000)))
1179 if (buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_DBGACK
, 1) != 0)
1181 embeddedice_read_reg(dbg_stat
);
1182 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1184 if (debug_level
>= 3)
1194 LOG_ERROR("Failed to halt CPU after 1 sec");
1195 return ERROR_TARGET_TIMEOUT
;
1197 target
->state
= TARGET_HALTED
;
1199 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1200 * ensure that DBGRQ is cleared
1202 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 1);
1203 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGRQ
, 1, 0);
1204 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_INTDIS
, 1, 1);
1205 embeddedice_store_reg(dbg_ctrl
);
1207 if ((retval
= arm7_9_clear_halt(target
)) != ERROR_OK
)
1212 /* if the target is in Thumb state, change to ARM state */
1213 if (buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_ITBIT
, 1))
1215 uint32_t r0_thumb
, pc_thumb
;
1216 LOG_DEBUG("target entered debug from Thumb state, changing to ARM");
1217 /* Entered debug from Thumb mode */
1218 armv4_5
->core_state
= ARM_STATE_THUMB
;
1219 arm7_9
->change_to_arm(target
, &r0_thumb
, &pc_thumb
);
1222 /* REVISIT likewise for bit 5 -- switch Jazelle-to-ARM */
1224 /* all register content is now invalid */
1225 register_cache_invalidate(armv4_5
->core_cache
);
1227 /* SVC, ARM state, IRQ and FIQ disabled */
1230 cpsr
= buf_get_u32(armv4_5
->cpsr
->value
, 0, 32);
1233 arm_set_cpsr(armv4_5
, cpsr
);
1234 armv4_5
->cpsr
->dirty
= 1;
1236 /* start fetching from 0x0 */
1237 buf_set_u32(armv4_5
->pc
->value
, 0, 32, 0x0);
1238 armv4_5
->pc
->dirty
= 1;
1239 armv4_5
->pc
->valid
= 1;
1241 /* reset registers */
1242 for (i
= 0; i
<= 14; i
++)
1244 struct reg
*r
= arm_reg_current(armv4_5
, i
);
1246 buf_set_u32(r
->value
, 0, 32, 0xffffffff);
1251 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_HALTED
)) != ERROR_OK
)
1260 * Halt an ARM7/9 target. This is accomplished by either asserting the DBGRQ
1261 * line or by programming a watchpoint to trigger on any address. It is
1262 * considered a bug to call this function while the target is in the
1263 * TARGET_RESET state.
1265 * @param target Pointer to the ARM7/9 target to be halted
1266 * @return Always ERROR_OK
1268 int arm7_9_halt(struct target
*target
)
1270 if (target
->state
== TARGET_RESET
)
1272 LOG_ERROR("BUG: arm7/9 does not support halt during reset. This is handled in arm7_9_assert_reset()");
1276 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1277 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
1279 LOG_DEBUG("target->state: %s",
1280 target_state_name(target
));
1282 if (target
->state
== TARGET_HALTED
)
1284 LOG_DEBUG("target was already halted");
1288 if (target
->state
== TARGET_UNKNOWN
)
1290 LOG_WARNING("target was in unknown state when halt was requested");
1293 if (arm7_9
->use_dbgrq
)
1295 /* program EmbeddedICE Debug Control Register to assert DBGRQ
1297 if (arm7_9
->set_special_dbgrq
) {
1298 arm7_9
->set_special_dbgrq(target
);
1300 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGRQ
, 1, 1);
1301 embeddedice_store_reg(dbg_ctrl
);
1306 /* program watchpoint unit to match on any address
1308 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], 0xffffffff);
1309 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], 0xffffffff);
1310 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
1311 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
1314 target
->debug_reason
= DBG_REASON_DBGRQ
;
1320 * Handle an ARM7/9 target's entry into debug mode. The halt is cleared on the
1321 * ARM. The JTAG queue is then executed and the reason for debug entry is
1322 * examined. Once done, the target is verified to be halted and the processor
1323 * is forced into ARM mode. The core registers are saved for the current core
1324 * mode and the program counter (register 15) is updated as needed. The core
1325 * registers and CPSR and SPSR are saved for restoration later.
1327 * @param target Pointer to target that is entering debug mode
1328 * @return Error code if anything fails, otherwise ERROR_OK
1330 static int arm7_9_debug_entry(struct target
*target
)
1333 uint32_t context
[16];
1334 uint32_t* context_p
[16];
1335 uint32_t r0_thumb
, pc_thumb
;
1336 uint32_t cpsr
, cpsr_mask
= 0;
1338 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1339 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1340 struct reg
*dbg_stat
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_STAT
];
1341 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
1343 #ifdef _DEBUG_ARM7_9_
1347 /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1348 * ensure that DBGRQ is cleared
1350 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 1);
1351 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGRQ
, 1, 0);
1352 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_INTDIS
, 1, 1);
1353 embeddedice_store_reg(dbg_ctrl
);
1355 if ((retval
= arm7_9_clear_halt(target
)) != ERROR_OK
)
1360 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1365 if ((retval
= arm7_9
->examine_debug_reason(target
)) != ERROR_OK
)
1369 if (target
->state
!= TARGET_HALTED
)
1371 LOG_WARNING("target not halted");
1372 return ERROR_TARGET_NOT_HALTED
;
1375 /* if the target is in Thumb state, change to ARM state */
1376 if (buf_get_u32(dbg_stat
->value
, EICE_DBG_STATUS_ITBIT
, 1))
1378 LOG_DEBUG("target entered debug from Thumb state");
1379 /* Entered debug from Thumb mode */
1380 armv4_5
->core_state
= ARM_STATE_THUMB
;
1382 arm7_9
->change_to_arm(target
, &r0_thumb
, &pc_thumb
);
1383 LOG_DEBUG("r0_thumb: 0x%8.8" PRIx32
1384 ", pc_thumb: 0x%8.8" PRIx32
, r0_thumb
, pc_thumb
);
1385 } else if (buf_get_u32(dbg_stat
->value
, 5, 1)) {
1386 /* \todo Get some vaguely correct handling of Jazelle, if
1387 * anyone ever uses it and full info becomes available.
1388 * See ARM9EJS TRM B.7.1 for how to switch J->ARM; and
1389 * B.7.3 for the reverse. That'd be the bare minimum...
1391 LOG_DEBUG("target entered debug from Jazelle state");
1392 armv4_5
->core_state
= ARM_STATE_JAZELLE
;
1393 cpsr_mask
= 1 << 24;
1394 LOG_ERROR("Jazelle debug entry -- BROKEN!");
1396 LOG_DEBUG("target entered debug from ARM state");
1397 /* Entered debug from ARM mode */
1398 armv4_5
->core_state
= ARM_STATE_ARM
;
1401 for (i
= 0; i
< 16; i
++)
1402 context_p
[i
] = &context
[i
];
1403 /* save core registers (r0 - r15 of current core mode) */
1404 arm7_9
->read_core_regs(target
, 0xffff, context_p
);
1406 arm7_9
->read_xpsr(target
, &cpsr
, 0);
1408 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1411 /* Sync our CPSR copy with J or T bits EICE reported, but
1412 * which we then erased by putting the core into ARM mode.
1414 arm_set_cpsr(armv4_5
, cpsr
| cpsr_mask
);
1416 if (!is_arm_mode(armv4_5
->core_mode
))
1418 target
->state
= TARGET_UNKNOWN
;
1419 LOG_ERROR("cpsr contains invalid mode value - communication failure");
1420 return ERROR_TARGET_FAILURE
;
1423 LOG_DEBUG("target entered debug state in %s mode",
1424 arm_mode_name(armv4_5
->core_mode
));
1426 if (armv4_5
->core_state
== ARM_STATE_THUMB
)
1428 LOG_DEBUG("thumb state, applying fixups");
1429 context
[0] = r0_thumb
;
1430 context
[15] = pc_thumb
;
1431 } else if (armv4_5
->core_state
== ARM_STATE_ARM
)
1433 /* adjust value stored by STM */
1434 context
[15] -= 3 * 4;
1437 if ((target
->debug_reason
!= DBG_REASON_DBGRQ
) || (!arm7_9
->use_dbgrq
))
1438 context
[15] -= 3 * ((armv4_5
->core_state
== ARM_STATE_ARM
) ? 4 : 2);
1440 context
[15] -= arm7_9
->dbgreq_adjust_pc
* ((armv4_5
->core_state
== ARM_STATE_ARM
) ? 4 : 2);
1442 for (i
= 0; i
<= 15; i
++)
1444 struct reg
*r
= arm_reg_current(armv4_5
, i
);
1446 LOG_DEBUG("r%i: 0x%8.8" PRIx32
"", i
, context
[i
]);
1448 buf_set_u32(r
->value
, 0, 32, context
[i
]);
1449 /* r0 and r15 (pc) have to be restored later */
1450 r
->dirty
= (i
== 0) || (i
== 15);
1454 LOG_DEBUG("entered debug state at PC 0x%" PRIx32
"", context
[15]);
1456 /* exceptions other than USR & SYS have a saved program status register */
1457 if (armv4_5
->spsr
) {
1459 arm7_9
->read_xpsr(target
, &spsr
, 1);
1460 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1464 buf_set_u32(armv4_5
->spsr
->value
, 0, 32, spsr
);
1465 armv4_5
->spsr
->dirty
= 0;
1466 armv4_5
->spsr
->valid
= 1;
1469 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1472 if (arm7_9
->post_debug_entry
)
1473 arm7_9
->post_debug_entry(target
);
1479 * Validate the full context for an ARM7/9 target in all processor modes. If
1480 * there are any invalid registers for the target, they will all be read. This
1483 * @param target Pointer to the ARM7/9 target to capture the full context from
1484 * @return Error if the target is not halted, has an invalid core mode, or if
1485 * the JTAG queue fails to execute
1487 static int arm7_9_full_context(struct target
*target
)
1491 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1492 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1496 if (target
->state
!= TARGET_HALTED
)
1498 LOG_WARNING("target not halted");
1499 return ERROR_TARGET_NOT_HALTED
;
1502 if (!is_arm_mode(armv4_5
->core_mode
))
1505 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1506 * SYS shares registers with User, so we don't touch SYS
1508 for (i
= 0; i
< 6; i
++)
1511 uint32_t* reg_p
[16];
1515 /* check if there are invalid registers in the current mode
1517 for (j
= 0; j
<= 16; j
++)
1519 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).valid
== 0)
1527 /* change processor mode (and mask T bit) */
1528 tmp_cpsr
= buf_get_u32(armv4_5
->cpsr
->value
, 0, 8)
1530 tmp_cpsr
|= armv4_5_number_to_mode(i
);
1532 arm7_9
->write_xpsr_im8(target
, tmp_cpsr
& 0xff, 0, 0);
1534 for (j
= 0; j
< 15; j
++)
1536 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).valid
== 0)
1538 reg_p
[j
] = (uint32_t*)ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).value
;
1540 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).valid
= 1;
1541 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).dirty
= 0;
1545 /* if only the PSR is invalid, mask is all zeroes */
1547 arm7_9
->read_core_regs(target
, mask
, reg_p
);
1549 /* check if the PSR has to be read */
1550 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).valid
== 0)
1552 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);
1553 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).valid
= 1;
1554 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).dirty
= 0;
1559 /* restore processor mode (mask T bit) */
1560 arm7_9
->write_xpsr_im8(target
,
1561 buf_get_u32(armv4_5
->cpsr
->value
, 0, 8) & ~0x20,
1564 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
1572 * Restore the processor context on an ARM7/9 target. The full processor
1573 * context is analyzed to see if any of the registers are dirty on this end, but
1574 * have a valid new value. If this is the case, the processor is changed to the
1575 * appropriate mode and the new register values are written out to the
1576 * processor. If there happens to be a dirty register with an invalid value, an
1577 * error will be logged.
1579 * @param target Pointer to the ARM7/9 target to have its context restored
1580 * @return Error status if the target is not halted or the core mode in the
1581 * armv4_5 struct is invalid.
1583 static int arm7_9_restore_context(struct target
*target
)
1585 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1586 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1588 struct arm_reg
*reg_arch_info
;
1589 enum arm_mode current_mode
= armv4_5
->core_mode
;
1596 if (target
->state
!= TARGET_HALTED
)
1598 LOG_WARNING("target not halted");
1599 return ERROR_TARGET_NOT_HALTED
;
1602 if (arm7_9
->pre_restore_context
)
1603 arm7_9
->pre_restore_context(target
);
1605 if (!is_arm_mode(armv4_5
->core_mode
))
1608 /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1609 * SYS shares registers with User, so we don't touch SYS
1611 for (i
= 0; i
< 6; i
++)
1613 LOG_DEBUG("examining %s mode",
1614 arm_mode_name(armv4_5
->core_mode
));
1617 /* check if there are dirty registers in the current mode
1619 for (j
= 0; j
<= 16; j
++)
1621 reg
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
);
1622 reg_arch_info
= reg
->arch_info
;
1623 if (reg
->dirty
== 1)
1625 if (reg
->valid
== 1)
1628 LOG_DEBUG("examining dirty reg: %s", reg
->name
);
1629 if ((reg_arch_info
->mode
!= ARM_MODE_ANY
)
1630 && (reg_arch_info
->mode
!= current_mode
)
1631 && !((reg_arch_info
->mode
== ARM_MODE_USR
) && (armv4_5
->core_mode
== ARM_MODE_SYS
))
1632 && !((reg_arch_info
->mode
== ARM_MODE_SYS
) && (armv4_5
->core_mode
== ARM_MODE_USR
)))
1635 LOG_DEBUG("require mode change");
1640 LOG_ERROR("BUG: dirty register '%s', but no valid data", reg
->name
);
1647 uint32_t mask
= 0x0;
1655 /* change processor mode (mask T bit) */
1656 tmp_cpsr
= buf_get_u32(armv4_5
->cpsr
->value
,
1658 tmp_cpsr
|= armv4_5_number_to_mode(i
);
1660 arm7_9
->write_xpsr_im8(target
, tmp_cpsr
& 0xff, 0, 0);
1661 current_mode
= armv4_5_number_to_mode(i
);
1664 for (j
= 0; j
<= 14; j
++)
1666 reg
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
);
1667 reg_arch_info
= reg
->arch_info
;
1670 if (reg
->dirty
== 1)
1672 regs
[j
] = buf_get_u32(reg
->value
, 0, 32);
1677 LOG_DEBUG("writing register %i mode %s "
1678 "with value 0x%8.8" PRIx32
, j
,
1679 arm_mode_name(armv4_5
->core_mode
),
1686 arm7_9
->write_core_regs(target
, mask
, regs
);
1689 reg
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16);
1690 reg_arch_info
= reg
->arch_info
;
1691 if ((reg
->dirty
) && (reg_arch_info
->mode
!= ARM_MODE_ANY
))
1693 LOG_DEBUG("writing SPSR of mode %i with value 0x%8.8" PRIx32
"", i
, buf_get_u32(reg
->value
, 0, 32));
1694 arm7_9
->write_xpsr(target
, buf_get_u32(reg
->value
, 0, 32), 1);
1699 if (!armv4_5
->cpsr
->dirty
&& (armv4_5
->core_mode
!= current_mode
))
1701 /* restore processor mode (mask T bit) */
1704 tmp_cpsr
= buf_get_u32(armv4_5
->cpsr
->value
, 0, 8) & 0xE0;
1705 tmp_cpsr
|= armv4_5_number_to_mode(i
);
1707 LOG_DEBUG("writing lower 8 bit of cpsr with value 0x%2.2x", (unsigned)(tmp_cpsr
));
1708 arm7_9
->write_xpsr_im8(target
, tmp_cpsr
& 0xff, 0, 0);
1710 else if (armv4_5
->cpsr
->dirty
)
1712 /* CPSR has been changed, full restore necessary (mask T bit) */
1713 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1714 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1715 arm7_9
->write_xpsr(target
,
1716 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32)
1718 armv4_5
->cpsr
->dirty
= 0;
1719 armv4_5
->cpsr
->valid
= 1;
1723 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
,
1724 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1725 arm7_9
->write_pc(target
, buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1726 armv4_5
->pc
->dirty
= 0;
1732 * Restart the core of an ARM7/9 target. A RESTART command is sent to the
1733 * instruction register and the JTAG state is set to TAP_IDLE causing a core
1736 * @param target Pointer to the ARM7/9 target to be restarted
1737 * @return Result of executing the JTAG queue
1739 static int arm7_9_restart_core(struct target
*target
)
1741 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1742 struct arm_jtag
*jtag_info
= &arm7_9
->jtag_info
;
1744 /* set RESTART instruction */
1745 if (arm7_9
->need_bypass_before_restart
) {
1746 arm7_9
->need_bypass_before_restart
= 0;
1747 arm_jtag_set_instr(jtag_info
, 0xf, NULL
, TAP_IDLE
);
1749 arm_jtag_set_instr(jtag_info
, 0x4, NULL
, TAP_IDLE
);
1751 jtag_add_runtest(1, TAP_IDLE
);
1752 return jtag_execute_queue();
1756 * Enable the watchpoints on an ARM7/9 target. The target's watchpoints are
1757 * iterated through and are set on the target if they aren't already set.
1759 * @param target Pointer to the ARM7/9 target to enable watchpoints on
1761 static void arm7_9_enable_watchpoints(struct target
*target
)
1763 struct watchpoint
*watchpoint
= target
->watchpoints
;
1767 if (watchpoint
->set
== 0)
1768 arm7_9_set_watchpoint(target
, watchpoint
);
1769 watchpoint
= watchpoint
->next
;
1774 * Enable the breakpoints on an ARM7/9 target. The target's breakpoints are
1775 * iterated through and are set on the target.
1777 * @param target Pointer to the ARM7/9 target to enable breakpoints on
1779 static void arm7_9_enable_breakpoints(struct target
*target
)
1781 struct breakpoint
*breakpoint
= target
->breakpoints
;
1783 /* set any pending breakpoints */
1786 arm7_9_set_breakpoint(target
, breakpoint
);
1787 breakpoint
= breakpoint
->next
;
1791 int arm7_9_resume(struct target
*target
, int current
, uint32_t address
, int handle_breakpoints
, int debug_execution
)
1793 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1794 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1795 struct breakpoint
*breakpoint
= target
->breakpoints
;
1796 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
1797 int err
, retval
= ERROR_OK
;
1801 if (target
->state
!= TARGET_HALTED
)
1803 LOG_WARNING("target not halted");
1804 return ERROR_TARGET_NOT_HALTED
;
1807 if (!debug_execution
)
1809 target_free_all_working_areas(target
);
1812 /* current = 1: continue on current pc, otherwise continue at <address> */
1814 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
1816 uint32_t current_pc
;
1817 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1819 /* the front-end may request us not to handle breakpoints */
1820 if (handle_breakpoints
)
1822 breakpoint
= breakpoint_find(target
,
1823 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1824 if (breakpoint
!= NULL
)
1826 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32
" (id: %d)", breakpoint
->address
, breakpoint
->unique_id
);
1827 if ((retval
= arm7_9_unset_breakpoint(target
, breakpoint
)) != ERROR_OK
)
1832 /* calculate PC of next instruction */
1834 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1836 uint32_t current_opcode
;
1837 target_read_u32(target
, current_pc
, ¤t_opcode
);
1838 LOG_ERROR("Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1842 LOG_DEBUG("enable single-step");
1843 arm7_9
->enable_single_step(target
, next_pc
);
1845 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1847 if ((retval
= arm7_9_restore_context(target
)) != ERROR_OK
)
1852 if (armv4_5
->core_state
== ARM_STATE_ARM
)
1853 arm7_9
->branch_resume(target
);
1854 else if (armv4_5
->core_state
== ARM_STATE_THUMB
)
1856 arm7_9
->branch_resume_thumb(target
);
1860 LOG_ERROR("unhandled core state");
1864 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 0);
1865 embeddedice_write_reg(dbg_ctrl
, buf_get_u32(dbg_ctrl
->value
, 0, dbg_ctrl
->size
));
1866 err
= arm7_9_execute_sys_speed(target
);
1868 LOG_DEBUG("disable single-step");
1869 arm7_9
->disable_single_step(target
);
1871 if (err
!= ERROR_OK
)
1873 if ((retval
= arm7_9_set_breakpoint(target
, breakpoint
)) != ERROR_OK
)
1877 target
->state
= TARGET_UNKNOWN
;
1881 arm7_9_debug_entry(target
);
1882 LOG_DEBUG("new PC after step: 0x%8.8" PRIx32
,
1883 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1885 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1886 if ((retval
= arm7_9_set_breakpoint(target
, breakpoint
)) != ERROR_OK
)
1893 /* enable any pending breakpoints and watchpoints */
1894 arm7_9_enable_breakpoints(target
);
1895 arm7_9_enable_watchpoints(target
);
1897 if ((retval
= arm7_9_restore_context(target
)) != ERROR_OK
)
1902 if (armv4_5
->core_state
== ARM_STATE_ARM
)
1904 arm7_9
->branch_resume(target
);
1906 else if (armv4_5
->core_state
== ARM_STATE_THUMB
)
1908 arm7_9
->branch_resume_thumb(target
);
1912 LOG_ERROR("unhandled core state");
1916 /* deassert DBGACK and INTDIS */
1917 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 0);
1918 /* INTDIS only when we really resume, not during debug execution */
1919 if (!debug_execution
)
1920 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_INTDIS
, 1, 0);
1921 embeddedice_write_reg(dbg_ctrl
, buf_get_u32(dbg_ctrl
->value
, 0, dbg_ctrl
->size
));
1923 if ((retval
= arm7_9_restart_core(target
)) != ERROR_OK
)
1928 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1930 if (!debug_execution
)
1932 /* registers are now invalid */
1933 register_cache_invalidate(armv4_5
->core_cache
);
1934 target
->state
= TARGET_RUNNING
;
1935 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
)) != ERROR_OK
)
1942 target
->state
= TARGET_DEBUG_RUNNING
;
1943 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
)) != ERROR_OK
)
1949 LOG_DEBUG("target resumed");
1954 void arm7_9_enable_eice_step(struct target
*target
, uint32_t next_pc
)
1956 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1957 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
1958 uint32_t current_pc
;
1959 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1961 if (next_pc
!= current_pc
)
1963 /* setup an inverse breakpoint on the current PC
1964 * - comparator 1 matches the current address
1965 * - rangeout from comparator 1 is connected to comparator 0 rangein
1966 * - comparator 0 matches any address, as long as rangein is low */
1967 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], 0xffffffff);
1968 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], 0xffffffff);
1969 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
1970 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], ~(EICE_W_CTRL_RANGE
| EICE_W_CTRL_nOPC
) & 0xff);
1971 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_VALUE
], current_pc
);
1972 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
], 0);
1973 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
], 0xffffffff);
1974 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], 0x0);
1975 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
1979 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
], 0xffffffff);
1980 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
], 0xffffffff);
1981 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
], 0x0);
1982 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
], 0xff);
1983 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_VALUE
], next_pc
);
1984 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
], 0);
1985 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
], 0xffffffff);
1986 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
], EICE_W_CTRL_ENABLE
);
1987 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
], ~EICE_W_CTRL_nOPC
& 0xff);
1991 void arm7_9_disable_eice_step(struct target
*target
)
1993 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
1995 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_ADDR_MASK
]);
1996 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_DATA_MASK
]);
1997 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_VALUE
]);
1998 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W0_CONTROL_MASK
]);
1999 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_VALUE
]);
2000 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_ADDR_MASK
]);
2001 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_DATA_MASK
]);
2002 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_MASK
]);
2003 embeddedice_store_reg(&arm7_9
->eice_cache
->reg_list
[EICE_W1_CONTROL_VALUE
]);
2006 int arm7_9_step(struct target
*target
, int current
, uint32_t address
, int handle_breakpoints
)
2008 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2009 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2010 struct breakpoint
*breakpoint
= NULL
;
2013 if (target
->state
!= TARGET_HALTED
)
2015 LOG_WARNING("target not halted");
2016 return ERROR_TARGET_NOT_HALTED
;
2019 /* current = 1: continue on current pc, otherwise continue at <address> */
2021 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
2023 uint32_t current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
2025 /* the front-end may request us not to handle breakpoints */
2026 if (handle_breakpoints
)
2027 breakpoint
= breakpoint_find(target
, current_pc
);
2028 if (breakpoint
!= NULL
) {
2029 retval
= arm7_9_unset_breakpoint(target
, breakpoint
);
2030 if (retval
!= ERROR_OK
)
2034 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
2036 /* calculate PC of next instruction */
2038 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
2040 uint32_t current_opcode
;
2041 target_read_u32(target
, current_pc
, ¤t_opcode
);
2042 LOG_ERROR("Couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
2046 if ((retval
= arm7_9_restore_context(target
)) != ERROR_OK
)
2051 arm7_9
->enable_single_step(target
, next_pc
);
2053 if (armv4_5
->core_state
== ARM_STATE_ARM
)
2055 arm7_9
->branch_resume(target
);
2057 else if (armv4_5
->core_state
== ARM_STATE_THUMB
)
2059 arm7_9
->branch_resume_thumb(target
);
2063 LOG_ERROR("unhandled core state");
2067 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
)) != ERROR_OK
)
2072 err
= arm7_9_execute_sys_speed(target
);
2073 arm7_9
->disable_single_step(target
);
2075 /* registers are now invalid */
2076 register_cache_invalidate(armv4_5
->core_cache
);
2078 if (err
!= ERROR_OK
)
2080 target
->state
= TARGET_UNKNOWN
;
2082 arm7_9_debug_entry(target
);
2083 if ((retval
= target_call_event_callbacks(target
, TARGET_EVENT_HALTED
)) != ERROR_OK
)
2087 LOG_DEBUG("target stepped");
2091 if ((retval
= arm7_9_set_breakpoint(target
, breakpoint
)) != ERROR_OK
)
2099 static int arm7_9_read_core_reg(struct target
*target
, struct reg
*r
,
2100 int num
, enum arm_mode mode
)
2102 uint32_t* reg_p
[16];
2105 struct arm_reg
*areg
= r
->arch_info
;
2106 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2107 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2109 if (!is_arm_mode(armv4_5
->core_mode
))
2111 if ((num
< 0) || (num
> 16))
2112 return ERROR_INVALID_ARGUMENTS
;
2114 if ((mode
!= ARM_MODE_ANY
)
2115 && (mode
!= armv4_5
->core_mode
)
2116 && (areg
->mode
!= ARM_MODE_ANY
))
2120 /* change processor mode (mask T bit) */
2121 tmp_cpsr
= buf_get_u32(armv4_5
->cpsr
->value
, 0, 8) & 0xE0;
2124 arm7_9
->write_xpsr_im8(target
, tmp_cpsr
& 0xff, 0, 0);
2127 if ((num
>= 0) && (num
<= 15))
2129 /* read a normal core register */
2130 reg_p
[num
] = &value
;
2132 arm7_9
->read_core_regs(target
, 1 << num
, reg_p
);
2136 /* read a program status register
2137 * if the register mode is MODE_ANY, we read the cpsr, otherwise a spsr
2139 arm7_9
->read_xpsr(target
, &value
, areg
->mode
!= ARM_MODE_ANY
);
2142 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
2149 buf_set_u32(r
->value
, 0, 32, value
);
2151 if ((mode
!= ARM_MODE_ANY
)
2152 && (mode
!= armv4_5
->core_mode
)
2153 && (areg
->mode
!= ARM_MODE_ANY
)) {
2154 /* restore processor mode (mask T bit) */
2155 arm7_9
->write_xpsr_im8(target
,
2156 buf_get_u32(armv4_5
->cpsr
->value
, 0, 8)
2163 static int arm7_9_write_core_reg(struct target
*target
, struct reg
*r
,
2164 int num
, enum arm_mode mode
, uint32_t value
)
2167 struct arm_reg
*areg
= r
->arch_info
;
2168 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2169 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2171 if (!is_arm_mode(armv4_5
->core_mode
))
2173 if ((num
< 0) || (num
> 16))
2174 return ERROR_INVALID_ARGUMENTS
;
2176 if ((mode
!= ARM_MODE_ANY
)
2177 && (mode
!= armv4_5
->core_mode
)
2178 && (areg
->mode
!= ARM_MODE_ANY
)) {
2181 /* change processor mode (mask T bit) */
2182 tmp_cpsr
= buf_get_u32(armv4_5
->cpsr
->value
, 0, 8) & 0xE0;
2185 arm7_9
->write_xpsr_im8(target
, tmp_cpsr
& 0xff, 0, 0);
2188 if ((num
>= 0) && (num
<= 15))
2190 /* write a normal core register */
2193 arm7_9
->write_core_regs(target
, 1 << num
, reg
);
2197 /* write a program status register
2198 * if the register mode is MODE_ANY, we write the cpsr, otherwise a spsr
2200 int spsr
= (areg
->mode
!= ARM_MODE_ANY
);
2202 /* if we're writing the CPSR, mask the T bit */
2206 arm7_9
->write_xpsr(target
, value
, spsr
);
2212 if ((mode
!= ARM_MODE_ANY
)
2213 && (mode
!= armv4_5
->core_mode
)
2214 && (areg
->mode
!= ARM_MODE_ANY
)) {
2215 /* restore processor mode (mask T bit) */
2216 arm7_9
->write_xpsr_im8(target
,
2217 buf_get_u32(armv4_5
->cpsr
->value
, 0, 8)
2221 return jtag_execute_queue();
2224 int arm7_9_read_memory(struct target
*target
, uint32_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
)
2226 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2227 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2229 uint32_t num_accesses
= 0;
2230 int thisrun_accesses
;
2236 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
"", address
, size
, count
);
2238 if (target
->state
!= TARGET_HALTED
)
2240 LOG_WARNING("target not halted");
2241 return ERROR_TARGET_NOT_HALTED
;
2244 /* sanitize arguments */
2245 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
2246 return ERROR_INVALID_ARGUMENTS
;
2248 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
2249 return ERROR_TARGET_UNALIGNED_ACCESS
;
2251 /* load the base register with the address of the first word */
2253 arm7_9
->write_core_regs(target
, 0x1, reg
);
2260 while (num_accesses
< count
)
2263 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2264 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2266 if (last_reg
<= thisrun_accesses
)
2267 last_reg
= thisrun_accesses
;
2269 arm7_9
->load_word_regs(target
, reg_list
);
2271 /* fast memory reads are only safe when the target is running
2272 * from a sufficiently high clock (32 kHz is usually too slow)
2274 if (arm7_9
->fast_memory_access
)
2275 retval
= arm7_9_execute_fast_sys_speed(target
);
2277 retval
= arm7_9_execute_sys_speed(target
);
2278 if (retval
!= ERROR_OK
)
2281 arm7_9
->read_core_regs_target_buffer(target
, reg_list
, buffer
, 4);
2283 /* advance buffer, count number of accesses */
2284 buffer
+= thisrun_accesses
* 4;
2285 num_accesses
+= thisrun_accesses
;
2287 if ((j
++%1024) == 0)
2294 while (num_accesses
< count
)
2297 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2298 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2300 for (i
= 1; i
<= thisrun_accesses
; i
++)
2304 arm7_9
->load_hword_reg(target
, i
);
2305 /* fast memory reads are only safe when the target is running
2306 * from a sufficiently high clock (32 kHz is usually too slow)
2308 if (arm7_9
->fast_memory_access
)
2309 retval
= arm7_9_execute_fast_sys_speed(target
);
2311 retval
= arm7_9_execute_sys_speed(target
);
2312 if (retval
!= ERROR_OK
)
2319 arm7_9
->read_core_regs_target_buffer(target
, reg_list
, buffer
, 2);
2321 /* advance buffer, count number of accesses */
2322 buffer
+= thisrun_accesses
* 2;
2323 num_accesses
+= thisrun_accesses
;
2325 if ((j
++%1024) == 0)
2332 while (num_accesses
< count
)
2335 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2336 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2338 for (i
= 1; i
<= thisrun_accesses
; i
++)
2342 arm7_9
->load_byte_reg(target
, i
);
2343 /* fast memory reads are only safe when the target is running
2344 * from a sufficiently high clock (32 kHz is usually too slow)
2346 if (arm7_9
->fast_memory_access
)
2347 retval
= arm7_9_execute_fast_sys_speed(target
);
2349 retval
= arm7_9_execute_sys_speed(target
);
2350 if (retval
!= ERROR_OK
)
2356 arm7_9
->read_core_regs_target_buffer(target
, reg_list
, buffer
, 1);
2358 /* advance buffer, count number of accesses */
2359 buffer
+= thisrun_accesses
* 1;
2360 num_accesses
+= thisrun_accesses
;
2362 if ((j
++%1024) == 0)
2370 if (!is_arm_mode(armv4_5
->core_mode
))
2373 for (i
= 0; i
<= last_reg
; i
++) {
2374 struct reg
*r
= arm_reg_current(armv4_5
, i
);
2376 r
->dirty
= r
->valid
;
2379 arm7_9
->read_xpsr(target
, &cpsr
, 0);
2380 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
2382 LOG_ERROR("JTAG error while reading cpsr");
2383 return ERROR_TARGET_DATA_ABORT
;
2386 if (((cpsr
& 0x1f) == ARM_MODE_ABT
) && (armv4_5
->core_mode
!= ARM_MODE_ABT
))
2388 LOG_WARNING("memory read caused data abort (address: 0x%8.8" PRIx32
", size: 0x%" PRIx32
", count: 0x%" PRIx32
")", address
, size
, count
);
2390 arm7_9
->write_xpsr_im8(target
,
2391 buf_get_u32(armv4_5
->cpsr
->value
, 0, 8)
2394 return ERROR_TARGET_DATA_ABORT
;
2400 int arm7_9_write_memory(struct target
*target
, uint32_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
)
2402 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2403 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2404 struct reg
*dbg_ctrl
= &arm7_9
->eice_cache
->reg_list
[EICE_DBG_CTRL
];
2407 uint32_t num_accesses
= 0;
2408 int thisrun_accesses
;
2414 #ifdef _DEBUG_ARM7_9_
2415 LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address
, size
, count
);
2418 if (target
->state
!= TARGET_HALTED
)
2420 LOG_WARNING("target not halted");
2421 return ERROR_TARGET_NOT_HALTED
;
2424 /* sanitize arguments */
2425 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
2426 return ERROR_INVALID_ARGUMENTS
;
2428 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
2429 return ERROR_TARGET_UNALIGNED_ACCESS
;
2431 /* load the base register with the address of the first word */
2433 arm7_9
->write_core_regs(target
, 0x1, reg
);
2435 /* Clear DBGACK, to make sure memory fetches work as expected */
2436 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 0);
2437 embeddedice_store_reg(dbg_ctrl
);
2442 while (num_accesses
< count
)
2445 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2446 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2448 for (i
= 1; i
<= thisrun_accesses
; i
++)
2452 reg
[i
] = target_buffer_get_u32(target
, buffer
);
2456 arm7_9
->write_core_regs(target
, reg_list
, reg
);
2458 arm7_9
->store_word_regs(target
, reg_list
);
2460 /* fast memory writes are only safe when the target is running
2461 * from a sufficiently high clock (32 kHz is usually too slow)
2463 if (arm7_9
->fast_memory_access
)
2464 retval
= arm7_9_execute_fast_sys_speed(target
);
2467 retval
= arm7_9_execute_sys_speed(target
);
2470 * if memory writes are made when the clock is running slow
2471 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2472 * processor operations after a "reset halt" or "reset init",
2473 * need to immediately stroke the keep alive or will end up with
2474 * gdb "keep alive not sent error message" problem.
2480 if (retval
!= ERROR_OK
)
2485 num_accesses
+= thisrun_accesses
;
2489 while (num_accesses
< count
)
2492 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2493 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2495 for (i
= 1; i
<= thisrun_accesses
; i
++)
2499 reg
[i
] = target_buffer_get_u16(target
, buffer
) & 0xffff;
2503 arm7_9
->write_core_regs(target
, reg_list
, reg
);
2505 for (i
= 1; i
<= thisrun_accesses
; i
++)
2507 arm7_9
->store_hword_reg(target
, i
);
2509 /* fast memory writes are only safe when the target is running
2510 * from a sufficiently high clock (32 kHz is usually too slow)
2512 if (arm7_9
->fast_memory_access
)
2513 retval
= arm7_9_execute_fast_sys_speed(target
);
2516 retval
= arm7_9_execute_sys_speed(target
);
2519 * if memory writes are made when the clock is running slow
2520 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2521 * processor operations after a "reset halt" or "reset init",
2522 * need to immediately stroke the keep alive or will end up with
2523 * gdb "keep alive not sent error message" problem.
2529 if (retval
!= ERROR_OK
)
2535 num_accesses
+= thisrun_accesses
;
2539 while (num_accesses
< count
)
2542 thisrun_accesses
= ((count
- num_accesses
) >= 14) ? 14 : (count
- num_accesses
);
2543 reg_list
= (0xffff >> (15 - thisrun_accesses
)) & 0xfffe;
2545 for (i
= 1; i
<= thisrun_accesses
; i
++)
2549 reg
[i
] = *buffer
++ & 0xff;
2552 arm7_9
->write_core_regs(target
, reg_list
, reg
);
2554 for (i
= 1; i
<= thisrun_accesses
; i
++)
2556 arm7_9
->store_byte_reg(target
, i
);
2557 /* fast memory writes are only safe when the target is running
2558 * from a sufficiently high clock (32 kHz is usually too slow)
2560 if (arm7_9
->fast_memory_access
)
2561 retval
= arm7_9_execute_fast_sys_speed(target
);
2564 retval
= arm7_9_execute_sys_speed(target
);
2567 * if memory writes are made when the clock is running slow
2568 * (i.e. 32 kHz) which is necessary in some scripts to reconfigure
2569 * processor operations after a "reset halt" or "reset init",
2570 * need to immediately stroke the keep alive or will end up with
2571 * gdb "keep alive not sent error message" problem.
2577 if (retval
!= ERROR_OK
)
2584 num_accesses
+= thisrun_accesses
;
2590 buf_set_u32(dbg_ctrl
->value
, EICE_DBG_CONTROL_DBGACK
, 1, 1);
2591 embeddedice_store_reg(dbg_ctrl
);
2593 if (!is_arm_mode(armv4_5
->core_mode
))
2596 for (i
= 0; i
<= last_reg
; i
++) {
2597 struct reg
*r
= arm_reg_current(armv4_5
, i
);
2599 r
->dirty
= r
->valid
;
2602 arm7_9
->read_xpsr(target
, &cpsr
, 0);
2603 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
2605 LOG_ERROR("JTAG error while reading cpsr");
2606 return ERROR_TARGET_DATA_ABORT
;
2609 if (((cpsr
& 0x1f) == ARM_MODE_ABT
) && (armv4_5
->core_mode
!= ARM_MODE_ABT
))
2611 LOG_WARNING("memory write caused data abort (address: 0x%8.8" PRIx32
", size: 0x%" PRIx32
", count: 0x%" PRIx32
")", address
, size
, count
);
2613 arm7_9
->write_xpsr_im8(target
,
2614 buf_get_u32(armv4_5
->cpsr
->value
, 0, 8)
2617 return ERROR_TARGET_DATA_ABORT
;
2623 static int dcc_count
;
2624 static uint8_t *dcc_buffer
;
2626 static int arm7_9_dcc_completion(struct target
*target
, uint32_t exit_point
, int timeout_ms
, void *arch_info
)
2628 int retval
= ERROR_OK
;
2629 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2631 if ((retval
= target_wait_state(target
, TARGET_DEBUG_RUNNING
, 500)) != ERROR_OK
)
2634 int little
= target
->endianness
== TARGET_LITTLE_ENDIAN
;
2635 int count
= dcc_count
;
2636 uint8_t *buffer
= dcc_buffer
;
2639 /* Handle first & last using standard embeddedice_write_reg and the middle ones w/the
2640 * core function repeated. */
2641 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_COMMS_DATA
], fast_target_buffer_get_u32(buffer
, little
));
2644 struct embeddedice_reg
*ice_reg
= arm7_9
->eice_cache
->reg_list
[EICE_COMMS_DATA
].arch_info
;
2645 uint8_t reg_addr
= ice_reg
->addr
& 0x1f;
2646 struct jtag_tap
*tap
;
2647 tap
= ice_reg
->jtag_info
->tap
;
2649 embeddedice_write_dcc(tap
, reg_addr
, buffer
, little
, count
-2);
2650 buffer
+= (count
-2)*4;
2652 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_COMMS_DATA
], fast_target_buffer_get_u32(buffer
, little
));
2656 for (i
= 0; i
< count
; i
++)
2658 embeddedice_write_reg(&arm7_9
->eice_cache
->reg_list
[EICE_COMMS_DATA
], fast_target_buffer_get_u32(buffer
, little
));
2663 if ((retval
= target_halt(target
))!= ERROR_OK
)
2667 return target_wait_state(target
, TARGET_HALTED
, 500);
2670 static const uint32_t dcc_code
[] =
2672 /* r0 == input, points to memory buffer
2676 /* spin until DCC control (c0) reports data arrived */
2677 0xee101e10, /* w: mrc p14, #0, r1, c0, c0 */
2678 0xe3110001, /* tst r1, #1 */
2679 0x0afffffc, /* bne w */
2681 /* read word from DCC (c1), write to memory */
2682 0xee111e10, /* mrc p14, #0, r1, c1, c0 */
2683 0xe4801004, /* str r1, [r0], #4 */
2686 0xeafffff9 /* b w */
2689 int arm7_9_bulk_write_memory(struct target
*target
, uint32_t address
, uint32_t count
, uint8_t *buffer
)
2692 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2695 if (!arm7_9
->dcc_downloads
)
2696 return target_write_memory(target
, address
, 4, count
, buffer
);
2698 /* regrab previously allocated working_area, or allocate a new one */
2699 if (!arm7_9
->dcc_working_area
)
2701 uint8_t dcc_code_buf
[6 * 4];
2703 /* make sure we have a working area */
2704 if (target_alloc_working_area(target
, 24, &arm7_9
->dcc_working_area
) != ERROR_OK
)
2706 LOG_INFO("no working area available, falling back to memory writes");
2707 return target_write_memory(target
, address
, 4, count
, buffer
);
2710 /* copy target instructions to target endianness */
2711 for (i
= 0; i
< 6; i
++)
2713 target_buffer_set_u32(target
, dcc_code_buf
+ i
*4, dcc_code
[i
]);
2716 /* write DCC code to working area */
2717 if ((retval
= target_write_memory(target
, arm7_9
->dcc_working_area
->address
, 4, 6, dcc_code_buf
)) != ERROR_OK
)
2723 struct arm_algorithm armv4_5_info
;
2724 struct reg_param reg_params
[1];
2726 armv4_5_info
.common_magic
= ARM_COMMON_MAGIC
;
2727 armv4_5_info
.core_mode
= ARM_MODE_SVC
;
2728 armv4_5_info
.core_state
= ARM_STATE_ARM
;
2730 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
2732 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
2735 dcc_buffer
= buffer
;
2736 retval
= armv4_5_run_algorithm_inner(target
, 0, NULL
, 1, reg_params
,
2737 arm7_9
->dcc_working_area
->address
,
2738 arm7_9
->dcc_working_area
->address
+ 6*4,
2739 20*1000, &armv4_5_info
, arm7_9_dcc_completion
);
2741 if (retval
== ERROR_OK
)
2743 uint32_t endaddress
= buf_get_u32(reg_params
[0].value
, 0, 32);
2744 if (endaddress
!= (address
+ count
*4))
2746 LOG_ERROR("DCC write failed, expected end address 0x%08" PRIx32
" got 0x%0" PRIx32
"", (address
+ count
*4), endaddress
);
2747 retval
= ERROR_FAIL
;
2751 destroy_reg_param(®_params
[0]);
2757 * Perform per-target setup that requires JTAG access.
2759 int arm7_9_examine(struct target
*target
)
2761 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2764 if (!target_was_examined(target
)) {
2765 struct reg_cache
*t
, **cache_p
;
2767 t
= embeddedice_build_reg_cache(target
, arm7_9
);
2771 cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2773 arm7_9
->eice_cache
= (*cache_p
);
2775 if (arm7_9
->armv4_5_common
.etm
)
2776 (*cache_p
)->next
= etm_build_reg_cache(target
,
2778 arm7_9
->armv4_5_common
.etm
);
2780 target_set_examined(target
);
2783 retval
= embeddedice_setup(target
);
2784 if (retval
== ERROR_OK
)
2785 retval
= arm7_9_setup(target
);
2786 if (retval
== ERROR_OK
&& arm7_9
->armv4_5_common
.etm
)
2787 retval
= etm_setup(target
);
2792 int arm7_9_check_reset(struct target
*target
)
2794 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2796 if (get_target_reset_nag() && !arm7_9
->dcc_downloads
)
2798 LOG_WARNING("NOTE! DCC downloads have not been enabled, defaulting to slow memory writes. Type 'help dcc'.");
2801 if (get_target_reset_nag() && (target
->working_area_size
== 0))
2803 LOG_WARNING("NOTE! Severe performance degradation without working memory enabled.");
2806 if (get_target_reset_nag() && !arm7_9
->fast_memory_access
)
2808 LOG_WARNING("NOTE! Severe performance degradation without fast memory access enabled. Type 'help fast'.");
2814 COMMAND_HANDLER(handle_arm7_9_dbgrq_command
)
2816 struct target
*target
= get_current_target(CMD_CTX
);
2817 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2819 if (!is_arm7_9(arm7_9
))
2821 command_print(CMD_CTX
, "current target isn't an ARM7/ARM9 target");
2822 return ERROR_TARGET_INVALID
;
2826 COMMAND_PARSE_ENABLE(CMD_ARGV
[0],arm7_9
->use_dbgrq
);
2828 command_print(CMD_CTX
, "use of EmbeddedICE dbgrq instead of breakpoint for target halt %s", (arm7_9
->use_dbgrq
) ? "enabled" : "disabled");
2833 COMMAND_HANDLER(handle_arm7_9_fast_memory_access_command
)
2835 struct target
*target
= get_current_target(CMD_CTX
);
2836 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2838 if (!is_arm7_9(arm7_9
))
2840 command_print(CMD_CTX
, "current target isn't an ARM7/ARM9 target");
2841 return ERROR_TARGET_INVALID
;
2845 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], arm7_9
->fast_memory_access
);
2847 command_print(CMD_CTX
, "fast memory access is %s", (arm7_9
->fast_memory_access
) ? "enabled" : "disabled");
2852 COMMAND_HANDLER(handle_arm7_9_dcc_downloads_command
)
2854 struct target
*target
= get_current_target(CMD_CTX
);
2855 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2857 if (!is_arm7_9(arm7_9
))
2859 command_print(CMD_CTX
, "current target isn't an ARM7/ARM9 target");
2860 return ERROR_TARGET_INVALID
;
2864 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], arm7_9
->dcc_downloads
);
2866 command_print(CMD_CTX
, "dcc downloads are %s", (arm7_9
->dcc_downloads
) ? "enabled" : "disabled");
2871 static int arm7_9_setup_semihosting(struct target
*target
, int enable
)
2873 struct arm7_9_common
*arm7_9
= target_to_arm7_9(target
);
2875 if (!is_arm7_9(arm7_9
))
2877 LOG_USER("current target isn't an ARM7/ARM9 target");
2878 return ERROR_TARGET_INVALID
;
2881 if (arm7_9
->has_vector_catch
) {
2882 struct reg
*vector_catch
= &arm7_9
->eice_cache
2883 ->reg_list
[EICE_VEC_CATCH
];
2885 if (!vector_catch
->valid
)
2886 embeddedice_read_reg(vector_catch
);
2887 buf_set_u32(vector_catch
->value
, 2, 1, enable
);
2888 embeddedice_store_reg(vector_catch
);
2890 /* TODO: allow optional high vectors and/or BKPT_HARD */
2892 breakpoint_add(target
, 8, 4, BKPT_SOFT
);
2894 breakpoint_remove(target
, 8);
2900 int arm7_9_init_arch_info(struct target
*target
, struct arm7_9_common
*arm7_9
)
2902 int retval
= ERROR_OK
;
2903 struct arm
*armv4_5
= &arm7_9
->armv4_5_common
;
2905 arm7_9
->common_magic
= ARM7_9_COMMON_MAGIC
;
2907 if ((retval
= arm_jtag_setup_connection(&arm7_9
->jtag_info
)) != ERROR_OK
)
2910 /* caller must have allocated via calloc(), so everything's zeroed */
2912 arm7_9
->wp_available_max
= 2;
2914 arm7_9
->fast_memory_access
= false;
2915 arm7_9
->dcc_downloads
= false;
2917 armv4_5
->arch_info
= arm7_9
;
2918 armv4_5
->read_core_reg
= arm7_9_read_core_reg
;
2919 armv4_5
->write_core_reg
= arm7_9_write_core_reg
;
2920 armv4_5
->full_context
= arm7_9_full_context
;
2921 armv4_5
->setup_semihosting
= arm7_9_setup_semihosting
;
2923 retval
= arm_init_arch_info(target
, armv4_5
);
2924 if (retval
!= ERROR_OK
)
2927 return target_register_timer_callback(arm7_9_handle_target_request
,
2931 static const struct command_registration arm7_9_any_command_handlers
[] = {
2934 .handler
= handle_arm7_9_dbgrq_command
,
2935 .mode
= COMMAND_ANY
,
2936 .usage
= "['enable'|'disable']",
2937 .help
= "use EmbeddedICE dbgrq instead of breakpoint "
2938 "for target halt requests",
2941 "fast_memory_access",
2942 .handler
= handle_arm7_9_fast_memory_access_command
,
2943 .mode
= COMMAND_ANY
,
2944 .usage
= "['enable'|'disable']",
2945 .help
= "use fast memory accesses instead of slower "
2946 "but potentially safer accesses",
2950 .handler
= handle_arm7_9_dcc_downloads_command
,
2951 .mode
= COMMAND_ANY
,
2952 .usage
= "['enable'|'disable']",
2953 .help
= "use DCC downloads for larger memory writes",
2955 COMMAND_REGISTRATION_DONE
2957 const struct command_registration arm7_9_command_handlers
[] = {
2959 .chain
= arm_command_handlers
,
2962 .chain
= etm_command_handlers
,
2966 .mode
= COMMAND_ANY
,
2967 .help
= "arm7/9 specific commands",
2968 .chain
= arm7_9_any_command_handlers
,
2970 COMMAND_REGISTRATION_DONE
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