1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
25 * Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0) *
27 ***************************************************************************/
32 #include "jtag/interface.h"
33 #include "breakpoints.h"
35 #include "target_request.h"
36 #include "target_type.h"
37 #include "arm_adi_v5.h"
38 #include "arm_disassembler.h"
40 #include "arm_opcodes.h"
41 #include "arm_semihosting.h"
42 #include <helper/time_support.h>
45 /* NOTE: most of this should work fine for the Cortex-M1 and
46 * Cortex-M0 cores too, although they're ARMv6-M not ARMv7-M.
47 * Some differences: M0/M1 doesn't have FPB remapping or the
48 * DWT tracing/profiling support. (So the cycle counter will
49 * not be usable; the other stuff isn't currently used here.)
51 * Although there are some workarounds for errata seen only in r0p0
52 * silicon, such old parts are hard to find and thus not much tested
56 /* Timeout for register r/w */
57 #define DHCSR_S_REGRDY_TIMEOUT (500)
59 /* Supported Cortex-M Cores */
60 static const struct cortex_m_part_info cortex_m_parts
[] = {
62 .partno
= CORTEX_M0_PARTNO
,
67 .partno
= CORTEX_M0P_PARTNO
,
72 .partno
= CORTEX_M1_PARTNO
,
77 .partno
= CORTEX_M3_PARTNO
,
80 .flags
= CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K
,
83 .partno
= CORTEX_M4_PARTNO
,
86 .flags
= CORTEX_M_F_HAS_FPV4
| CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K
,
89 .partno
= CORTEX_M7_PARTNO
,
92 .flags
= CORTEX_M_F_HAS_FPV5
,
95 .partno
= CORTEX_M23_PARTNO
,
100 .partno
= CORTEX_M33_PARTNO
,
101 .name
= "Cortex-M33",
102 .arch
= ARM_ARCH_V8M
,
103 .flags
= CORTEX_M_F_HAS_FPV5
,
106 .partno
= CORTEX_M35P_PARTNO
,
107 .name
= "Cortex-M35P",
108 .arch
= ARM_ARCH_V8M
,
109 .flags
= CORTEX_M_F_HAS_FPV5
,
112 .partno
= CORTEX_M55_PARTNO
,
113 .name
= "Cortex-M55",
114 .arch
= ARM_ARCH_V8M
,
115 .flags
= CORTEX_M_F_HAS_FPV5
,
119 /* forward declarations */
120 static int cortex_m_store_core_reg_u32(struct target
*target
,
121 uint32_t num
, uint32_t value
);
122 static void cortex_m_dwt_free(struct target
*target
);
124 /** DCB DHCSR register contains S_RETIRE_ST and S_RESET_ST bits cleared
125 * on a read. Call this helper function each time DHCSR is read
126 * to preserve S_RESET_ST state in case of a reset event was detected.
128 static inline void cortex_m_cumulate_dhcsr_sticky(struct cortex_m_common
*cortex_m
,
131 cortex_m
->dcb_dhcsr_cumulated_sticky
|= dhcsr
;
134 /** Read DCB DHCSR register to cortex_m->dcb_dhcsr and cumulate
135 * sticky bits in cortex_m->dcb_dhcsr_cumulated_sticky
137 static int cortex_m_read_dhcsr_atomic_sticky(struct target
*target
)
139 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
140 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
142 int retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, DCB_DHCSR
,
143 &cortex_m
->dcb_dhcsr
);
144 if (retval
!= ERROR_OK
)
147 cortex_m_cumulate_dhcsr_sticky(cortex_m
, cortex_m
->dcb_dhcsr
);
151 static int cortex_m_load_core_reg_u32(struct target
*target
,
152 uint32_t regsel
, uint32_t *value
)
154 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
155 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
157 uint32_t dcrdr
, tmp_value
;
160 /* because the DCB_DCRDR is used for the emulated dcc channel
161 * we have to save/restore the DCB_DCRDR when used */
162 if (target
->dbg_msg_enabled
) {
163 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DCRDR
, &dcrdr
);
164 if (retval
!= ERROR_OK
)
168 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRSR
, regsel
);
169 if (retval
!= ERROR_OK
)
172 /* check if value from register is ready and pre-read it */
175 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DHCSR
,
176 &cortex_m
->dcb_dhcsr
);
177 if (retval
!= ERROR_OK
)
179 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, DCB_DCRDR
,
181 if (retval
!= ERROR_OK
)
183 cortex_m_cumulate_dhcsr_sticky(cortex_m
, cortex_m
->dcb_dhcsr
);
184 if (cortex_m
->dcb_dhcsr
& S_REGRDY
)
186 cortex_m
->slow_register_read
= true; /* Polling (still) needed. */
187 if (timeval_ms() > then
+ DHCSR_S_REGRDY_TIMEOUT
) {
188 LOG_TARGET_ERROR(target
, "Timeout waiting for DCRDR transfer ready");
189 return ERROR_TIMEOUT_REACHED
;
196 if (target
->dbg_msg_enabled
) {
197 /* restore DCB_DCRDR - this needs to be in a separate
198 * transaction otherwise the emulated DCC channel breaks */
199 if (retval
== ERROR_OK
)
200 retval
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, DCB_DCRDR
, dcrdr
);
206 static int cortex_m_slow_read_all_regs(struct target
*target
)
208 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
209 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
210 const unsigned int num_regs
= armv7m
->arm
.core_cache
->num_regs
;
212 /* Opportunistically restore fast read, it'll revert to slow
213 * if any register needed polling in cortex_m_load_core_reg_u32(). */
214 cortex_m
->slow_register_read
= false;
216 for (unsigned int reg_id
= 0; reg_id
< num_regs
; reg_id
++) {
217 struct reg
*r
= &armv7m
->arm
.core_cache
->reg_list
[reg_id
];
219 int retval
= armv7m
->arm
.read_core_reg(target
, r
, reg_id
, ARM_MODE_ANY
);
220 if (retval
!= ERROR_OK
)
225 if (!cortex_m
->slow_register_read
)
226 LOG_TARGET_DEBUG(target
, "Switching back to fast register reads");
231 static int cortex_m_queue_reg_read(struct target
*target
, uint32_t regsel
,
232 uint32_t *reg_value
, uint32_t *dhcsr
)
234 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
237 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRSR
, regsel
);
238 if (retval
!= ERROR_OK
)
241 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DHCSR
, dhcsr
);
242 if (retval
!= ERROR_OK
)
245 return mem_ap_read_u32(armv7m
->debug_ap
, DCB_DCRDR
, reg_value
);
248 static int cortex_m_fast_read_all_regs(struct target
*target
)
250 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
251 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
255 /* because the DCB_DCRDR is used for the emulated dcc channel
256 * we have to save/restore the DCB_DCRDR when used */
257 if (target
->dbg_msg_enabled
) {
258 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DCRDR
, &dcrdr
);
259 if (retval
!= ERROR_OK
)
263 const unsigned int num_regs
= armv7m
->arm
.core_cache
->num_regs
;
264 const unsigned int n_r32
= ARMV7M_LAST_REG
- ARMV7M_CORE_FIRST_REG
+ 1
265 + ARMV7M_FPU_LAST_REG
- ARMV7M_FPU_FIRST_REG
+ 1;
266 /* we need one 32-bit word for each register except FP D0..D15, which
268 uint32_t r_vals
[n_r32
];
269 uint32_t dhcsr
[n_r32
];
271 unsigned int wi
= 0; /* write index to r_vals and dhcsr arrays */
272 unsigned int reg_id
; /* register index in the reg_list, ARMV7M_R0... */
273 for (reg_id
= 0; reg_id
< num_regs
; reg_id
++) {
274 struct reg
*r
= &armv7m
->arm
.core_cache
->reg_list
[reg_id
];
276 continue; /* skip non existent registers */
279 /* Any 8-bit or shorter register is unpacked from a 32-bit
280 * container register. Skip it now. */
284 uint32_t regsel
= armv7m_map_id_to_regsel(reg_id
);
285 retval
= cortex_m_queue_reg_read(target
, regsel
, &r_vals
[wi
],
287 if (retval
!= ERROR_OK
)
291 assert(r
->size
== 32 || r
->size
== 64);
293 continue; /* done with 32-bit register */
295 assert(reg_id
>= ARMV7M_FPU_FIRST_REG
&& reg_id
<= ARMV7M_FPU_LAST_REG
);
296 /* the odd part of FP register (S1, S3...) */
297 retval
= cortex_m_queue_reg_read(target
, regsel
+ 1, &r_vals
[wi
],
299 if (retval
!= ERROR_OK
)
306 retval
= dap_run(armv7m
->debug_ap
->dap
);
307 if (retval
!= ERROR_OK
)
310 if (target
->dbg_msg_enabled
) {
311 /* restore DCB_DCRDR - this needs to be in a separate
312 * transaction otherwise the emulated DCC channel breaks */
313 retval
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, DCB_DCRDR
, dcrdr
);
314 if (retval
!= ERROR_OK
)
318 bool not_ready
= false;
319 for (unsigned int i
= 0; i
< wi
; i
++) {
320 if ((dhcsr
[i
] & S_REGRDY
) == 0) {
322 LOG_TARGET_DEBUG(target
, "Register %u was not ready during fast read", i
);
324 cortex_m_cumulate_dhcsr_sticky(cortex_m
, dhcsr
[i
]);
328 /* Any register was not ready,
329 * fall back to slow read with S_REGRDY polling */
330 return ERROR_TIMEOUT_REACHED
;
333 LOG_TARGET_DEBUG(target
, "read %u 32-bit registers", wi
);
335 unsigned int ri
= 0; /* read index from r_vals array */
336 for (reg_id
= 0; reg_id
< num_regs
; reg_id
++) {
337 struct reg
*r
= &armv7m
->arm
.core_cache
->reg_list
[reg_id
];
339 continue; /* skip non existent registers */
343 unsigned int reg32_id
;
345 if (armv7m_map_reg_packing(reg_id
, ®32_id
, &offset
)) {
346 /* Unpack a partial register from 32-bit container register */
347 struct reg
*r32
= &armv7m
->arm
.core_cache
->reg_list
[reg32_id
];
349 /* The container register ought to precede all regs unpacked
350 * from it in the reg_list. So the value should be ready
353 buf_cpy(r32
->value
+ offset
, r
->value
, r
->size
);
356 assert(r
->size
== 32 || r
->size
== 64);
357 buf_set_u32(r
->value
, 0, 32, r_vals
[ri
++]);
360 assert(reg_id
>= ARMV7M_FPU_FIRST_REG
&& reg_id
<= ARMV7M_FPU_LAST_REG
);
361 /* the odd part of FP register (S1, S3...) */
362 buf_set_u32(r
->value
+ 4, 0, 32, r_vals
[ri
++]);
372 static int cortex_m_store_core_reg_u32(struct target
*target
,
373 uint32_t regsel
, uint32_t value
)
375 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
376 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
381 /* because the DCB_DCRDR is used for the emulated dcc channel
382 * we have to save/restore the DCB_DCRDR when used */
383 if (target
->dbg_msg_enabled
) {
384 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DCRDR
, &dcrdr
);
385 if (retval
!= ERROR_OK
)
389 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRDR
, value
);
390 if (retval
!= ERROR_OK
)
393 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRSR
, regsel
| DCRSR_WNR
);
394 if (retval
!= ERROR_OK
)
397 /* check if value is written into register */
400 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
401 if (retval
!= ERROR_OK
)
403 if (cortex_m
->dcb_dhcsr
& S_REGRDY
)
405 if (timeval_ms() > then
+ DHCSR_S_REGRDY_TIMEOUT
) {
406 LOG_TARGET_ERROR(target
, "Timeout waiting for DCRDR transfer ready");
407 return ERROR_TIMEOUT_REACHED
;
412 if (target
->dbg_msg_enabled
) {
413 /* restore DCB_DCRDR - this needs to be in a separate
414 * transaction otherwise the emulated DCC channel breaks */
415 if (retval
== ERROR_OK
)
416 retval
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, DCB_DCRDR
, dcrdr
);
422 static int cortex_m_write_debug_halt_mask(struct target
*target
,
423 uint32_t mask_on
, uint32_t mask_off
)
425 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
426 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
428 /* mask off status bits */
429 cortex_m
->dcb_dhcsr
&= ~((0xFFFFul
<< 16) | mask_off
);
430 /* create new register mask */
431 cortex_m
->dcb_dhcsr
|= DBGKEY
| C_DEBUGEN
| mask_on
;
433 return mem_ap_write_atomic_u32(armv7m
->debug_ap
, DCB_DHCSR
, cortex_m
->dcb_dhcsr
);
436 static int cortex_m_set_maskints(struct target
*target
, bool mask
)
438 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
439 if (!!(cortex_m
->dcb_dhcsr
& C_MASKINTS
) != mask
)
440 return cortex_m_write_debug_halt_mask(target
, mask
? C_MASKINTS
: 0, mask
? 0 : C_MASKINTS
);
445 static int cortex_m_set_maskints_for_halt(struct target
*target
)
447 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
448 switch (cortex_m
->isrmasking_mode
) {
449 case CORTEX_M_ISRMASK_AUTO
:
450 /* interrupts taken at resume, whether for step or run -> no mask */
451 return cortex_m_set_maskints(target
, false);
453 case CORTEX_M_ISRMASK_OFF
:
454 /* interrupts never masked */
455 return cortex_m_set_maskints(target
, false);
457 case CORTEX_M_ISRMASK_ON
:
458 /* interrupts always masked */
459 return cortex_m_set_maskints(target
, true);
461 case CORTEX_M_ISRMASK_STEPONLY
:
462 /* interrupts masked for single step only -> mask now if MASKINTS
463 * erratum, otherwise only mask before stepping */
464 return cortex_m_set_maskints(target
, cortex_m
->maskints_erratum
);
469 static int cortex_m_set_maskints_for_run(struct target
*target
)
471 switch (target_to_cm(target
)->isrmasking_mode
) {
472 case CORTEX_M_ISRMASK_AUTO
:
473 /* interrupts taken at resume, whether for step or run -> no mask */
474 return cortex_m_set_maskints(target
, false);
476 case CORTEX_M_ISRMASK_OFF
:
477 /* interrupts never masked */
478 return cortex_m_set_maskints(target
, false);
480 case CORTEX_M_ISRMASK_ON
:
481 /* interrupts always masked */
482 return cortex_m_set_maskints(target
, true);
484 case CORTEX_M_ISRMASK_STEPONLY
:
485 /* interrupts masked for single step only -> no mask */
486 return cortex_m_set_maskints(target
, false);
491 static int cortex_m_set_maskints_for_step(struct target
*target
)
493 switch (target_to_cm(target
)->isrmasking_mode
) {
494 case CORTEX_M_ISRMASK_AUTO
:
495 /* the auto-interrupt should already be done -> mask */
496 return cortex_m_set_maskints(target
, true);
498 case CORTEX_M_ISRMASK_OFF
:
499 /* interrupts never masked */
500 return cortex_m_set_maskints(target
, false);
502 case CORTEX_M_ISRMASK_ON
:
503 /* interrupts always masked */
504 return cortex_m_set_maskints(target
, true);
506 case CORTEX_M_ISRMASK_STEPONLY
:
507 /* interrupts masked for single step only -> mask */
508 return cortex_m_set_maskints(target
, true);
513 static int cortex_m_clear_halt(struct target
*target
)
515 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
516 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
519 /* clear step if any */
520 cortex_m_write_debug_halt_mask(target
, C_HALT
, C_STEP
);
522 /* Read Debug Fault Status Register */
523 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, NVIC_DFSR
, &cortex_m
->nvic_dfsr
);
524 if (retval
!= ERROR_OK
)
527 /* Clear Debug Fault Status */
528 retval
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, NVIC_DFSR
, cortex_m
->nvic_dfsr
);
529 if (retval
!= ERROR_OK
)
531 LOG_TARGET_DEBUG(target
, "NVIC_DFSR 0x%" PRIx32
"", cortex_m
->nvic_dfsr
);
536 static int cortex_m_single_step_core(struct target
*target
)
538 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
541 /* Mask interrupts before clearing halt, if not done already. This avoids
542 * Erratum 377497 (fixed in r1p0) where setting MASKINTS while clearing
543 * HALT can put the core into an unknown state.
545 if (!(cortex_m
->dcb_dhcsr
& C_MASKINTS
)) {
546 retval
= cortex_m_write_debug_halt_mask(target
, C_MASKINTS
, 0);
547 if (retval
!= ERROR_OK
)
550 retval
= cortex_m_write_debug_halt_mask(target
, C_STEP
, C_HALT
);
551 if (retval
!= ERROR_OK
)
553 LOG_TARGET_DEBUG(target
, "single step");
555 /* restore dhcsr reg */
556 cortex_m_clear_halt(target
);
561 static int cortex_m_enable_fpb(struct target
*target
)
563 int retval
= target_write_u32(target
, FP_CTRL
, 3);
564 if (retval
!= ERROR_OK
)
567 /* check the fpb is actually enabled */
569 retval
= target_read_u32(target
, FP_CTRL
, &fpctrl
);
570 if (retval
!= ERROR_OK
)
579 static int cortex_m_endreset_event(struct target
*target
)
583 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
584 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
585 struct adiv5_dap
*swjdp
= cortex_m
->armv7m
.arm
.dap
;
586 struct cortex_m_fp_comparator
*fp_list
= cortex_m
->fp_comparator_list
;
587 struct cortex_m_dwt_comparator
*dwt_list
= cortex_m
->dwt_comparator_list
;
589 /* REVISIT The four debug monitor bits are currently ignored... */
590 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, DCB_DEMCR
, &dcb_demcr
);
591 if (retval
!= ERROR_OK
)
593 LOG_TARGET_DEBUG(target
, "DCB_DEMCR = 0x%8.8" PRIx32
"", dcb_demcr
);
595 /* this register is used for emulated dcc channel */
596 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRDR
, 0);
597 if (retval
!= ERROR_OK
)
600 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
601 if (retval
!= ERROR_OK
)
604 if (!(cortex_m
->dcb_dhcsr
& C_DEBUGEN
)) {
605 /* Enable debug requests */
606 retval
= cortex_m_write_debug_halt_mask(target
, 0, C_HALT
| C_STEP
| C_MASKINTS
);
607 if (retval
!= ERROR_OK
)
611 /* Restore proper interrupt masking setting for running CPU. */
612 cortex_m_set_maskints_for_run(target
);
614 /* Enable features controlled by ITM and DWT blocks, and catch only
615 * the vectors we were told to pay attention to.
617 * Target firmware is responsible for all fault handling policy
618 * choices *EXCEPT* explicitly scripted overrides like "vector_catch"
619 * or manual updates to the NVIC SHCSR and CCR registers.
621 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DEMCR
, TRCENA
| armv7m
->demcr
);
622 if (retval
!= ERROR_OK
)
625 /* Paranoia: evidently some (early?) chips don't preserve all the
626 * debug state (including FPB, DWT, etc) across reset...
630 retval
= cortex_m_enable_fpb(target
);
631 if (retval
!= ERROR_OK
) {
632 LOG_TARGET_ERROR(target
, "Failed to enable the FPB");
636 cortex_m
->fpb_enabled
= true;
638 /* Restore FPB registers */
639 for (unsigned int i
= 0; i
< cortex_m
->fp_num_code
+ cortex_m
->fp_num_lit
; i
++) {
640 retval
= target_write_u32(target
, fp_list
[i
].fpcr_address
, fp_list
[i
].fpcr_value
);
641 if (retval
!= ERROR_OK
)
645 /* Restore DWT registers */
646 for (unsigned int i
= 0; i
< cortex_m
->dwt_num_comp
; i
++) {
647 retval
= target_write_u32(target
, dwt_list
[i
].dwt_comparator_address
+ 0,
649 if (retval
!= ERROR_OK
)
651 retval
= target_write_u32(target
, dwt_list
[i
].dwt_comparator_address
+ 4,
653 if (retval
!= ERROR_OK
)
655 retval
= target_write_u32(target
, dwt_list
[i
].dwt_comparator_address
+ 8,
656 dwt_list
[i
].function
);
657 if (retval
!= ERROR_OK
)
660 retval
= dap_run(swjdp
);
661 if (retval
!= ERROR_OK
)
664 register_cache_invalidate(armv7m
->arm
.core_cache
);
666 /* make sure we have latest dhcsr flags */
667 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
668 if (retval
!= ERROR_OK
)
674 static int cortex_m_examine_debug_reason(struct target
*target
)
676 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
678 /* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason
679 * only check the debug reason if we don't know it already */
681 if ((target
->debug_reason
!= DBG_REASON_DBGRQ
)
682 && (target
->debug_reason
!= DBG_REASON_SINGLESTEP
)) {
683 if (cortex_m
->nvic_dfsr
& DFSR_BKPT
) {
684 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
685 if (cortex_m
->nvic_dfsr
& DFSR_DWTTRAP
)
686 target
->debug_reason
= DBG_REASON_WPTANDBKPT
;
687 } else if (cortex_m
->nvic_dfsr
& DFSR_DWTTRAP
)
688 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
689 else if (cortex_m
->nvic_dfsr
& DFSR_VCATCH
)
690 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
691 else if (cortex_m
->nvic_dfsr
& DFSR_EXTERNAL
)
692 target
->debug_reason
= DBG_REASON_DBGRQ
;
694 target
->debug_reason
= DBG_REASON_UNDEFINED
;
700 static int cortex_m_examine_exception_reason(struct target
*target
)
702 uint32_t shcsr
= 0, except_sr
= 0, cfsr
= -1, except_ar
= -1;
703 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
704 struct adiv5_dap
*swjdp
= armv7m
->arm
.dap
;
707 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_SHCSR
, &shcsr
);
708 if (retval
!= ERROR_OK
)
710 switch (armv7m
->exception_number
) {
713 case 3: /* Hard Fault */
714 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, NVIC_HFSR
, &except_sr
);
715 if (retval
!= ERROR_OK
)
717 if (except_sr
& 0x40000000) {
718 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_CFSR
, &cfsr
);
719 if (retval
!= ERROR_OK
)
723 case 4: /* Memory Management */
724 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_CFSR
, &except_sr
);
725 if (retval
!= ERROR_OK
)
727 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_MMFAR
, &except_ar
);
728 if (retval
!= ERROR_OK
)
731 case 5: /* Bus Fault */
732 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_CFSR
, &except_sr
);
733 if (retval
!= ERROR_OK
)
735 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_BFAR
, &except_ar
);
736 if (retval
!= ERROR_OK
)
739 case 6: /* Usage Fault */
740 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_CFSR
, &except_sr
);
741 if (retval
!= ERROR_OK
)
744 case 7: /* Secure Fault */
745 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_SFSR
, &except_sr
);
746 if (retval
!= ERROR_OK
)
748 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_SFAR
, &except_ar
);
749 if (retval
!= ERROR_OK
)
752 case 11: /* SVCall */
754 case 12: /* Debug Monitor */
755 retval
= mem_ap_read_u32(armv7m
->debug_ap
, NVIC_DFSR
, &except_sr
);
756 if (retval
!= ERROR_OK
)
759 case 14: /* PendSV */
761 case 15: /* SysTick */
767 retval
= dap_run(swjdp
);
768 if (retval
== ERROR_OK
)
769 LOG_TARGET_DEBUG(target
, "%s SHCSR 0x%" PRIx32
", SR 0x%" PRIx32
770 ", CFSR 0x%" PRIx32
", AR 0x%" PRIx32
,
771 armv7m_exception_string(armv7m
->exception_number
),
772 shcsr
, except_sr
, cfsr
, except_ar
);
776 static int cortex_m_debug_entry(struct target
*target
)
780 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
781 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
782 struct arm
*arm
= &armv7m
->arm
;
785 LOG_TARGET_DEBUG(target
, " ");
787 /* Do this really early to minimize the window where the MASKINTS erratum
788 * can pile up pending interrupts. */
789 cortex_m_set_maskints_for_halt(target
);
791 cortex_m_clear_halt(target
);
793 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
794 if (retval
!= ERROR_OK
)
797 retval
= armv7m
->examine_debug_reason(target
);
798 if (retval
!= ERROR_OK
)
801 /* examine PE security state */
802 bool secure_state
= false;
803 if (armv7m
->arm
.arch
== ARM_ARCH_V8M
) {
806 retval
= mem_ap_read_u32(armv7m
->debug_ap
, DCB_DSCSR
, &dscsr
);
807 if (retval
!= ERROR_OK
)
810 secure_state
= (dscsr
& DSCSR_CDS
) == DSCSR_CDS
;
813 /* Load all registers to arm.core_cache */
814 if (!cortex_m
->slow_register_read
) {
815 retval
= cortex_m_fast_read_all_regs(target
);
816 if (retval
== ERROR_TIMEOUT_REACHED
) {
817 cortex_m
->slow_register_read
= true;
818 LOG_TARGET_DEBUG(target
, "Switched to slow register read");
822 if (cortex_m
->slow_register_read
)
823 retval
= cortex_m_slow_read_all_regs(target
);
825 if (retval
!= ERROR_OK
)
829 xPSR
= buf_get_u32(r
->value
, 0, 32);
831 /* Are we in an exception handler */
833 armv7m
->exception_number
= (xPSR
& 0x1FF);
835 arm
->core_mode
= ARM_MODE_HANDLER
;
836 arm
->map
= armv7m_msp_reg_map
;
838 unsigned control
= buf_get_u32(arm
->core_cache
839 ->reg_list
[ARMV7M_CONTROL
].value
, 0, 3);
841 /* is this thread privileged? */
842 arm
->core_mode
= control
& 1
843 ? ARM_MODE_USER_THREAD
846 /* which stack is it using? */
848 arm
->map
= armv7m_psp_reg_map
;
850 arm
->map
= armv7m_msp_reg_map
;
852 armv7m
->exception_number
= 0;
855 if (armv7m
->exception_number
)
856 cortex_m_examine_exception_reason(target
);
858 LOG_TARGET_DEBUG(target
, "entered debug state in core mode: %s at PC 0x%" PRIx32
859 ", cpu in %s state, target->state: %s",
860 arm_mode_name(arm
->core_mode
),
861 buf_get_u32(arm
->pc
->value
, 0, 32),
862 secure_state
? "Secure" : "Non-Secure",
863 target_state_name(target
));
865 if (armv7m
->post_debug_entry
) {
866 retval
= armv7m
->post_debug_entry(target
);
867 if (retval
!= ERROR_OK
)
874 static int cortex_m_poll(struct target
*target
)
876 int detected_failure
= ERROR_OK
;
877 int retval
= ERROR_OK
;
878 enum target_state prev_target_state
= target
->state
;
879 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
880 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
882 /* Read from Debug Halting Control and Status Register */
883 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
884 if (retval
!= ERROR_OK
) {
885 target
->state
= TARGET_UNKNOWN
;
889 /* Recover from lockup. See ARMv7-M architecture spec,
890 * section B1.5.15 "Unrecoverable exception cases".
892 if (cortex_m
->dcb_dhcsr
& S_LOCKUP
) {
893 LOG_TARGET_ERROR(target
, "clearing lockup after double fault");
894 cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
895 target
->debug_reason
= DBG_REASON_DBGRQ
;
897 /* We have to execute the rest (the "finally" equivalent, but
898 * still throw this exception again).
900 detected_failure
= ERROR_FAIL
;
902 /* refresh status bits */
903 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
904 if (retval
!= ERROR_OK
)
908 if (cortex_m
->dcb_dhcsr_cumulated_sticky
& S_RESET_ST
) {
909 cortex_m
->dcb_dhcsr_cumulated_sticky
&= ~S_RESET_ST
;
910 if (target
->state
!= TARGET_RESET
) {
911 target
->state
= TARGET_RESET
;
912 LOG_TARGET_INFO(target
, "external reset detected");
917 if (target
->state
== TARGET_RESET
) {
918 /* Cannot switch context while running so endreset is
919 * called with target->state == TARGET_RESET
921 LOG_TARGET_DEBUG(target
, "Exit from reset with dcb_dhcsr 0x%" PRIx32
,
922 cortex_m
->dcb_dhcsr
);
923 retval
= cortex_m_endreset_event(target
);
924 if (retval
!= ERROR_OK
) {
925 target
->state
= TARGET_UNKNOWN
;
928 target
->state
= TARGET_RUNNING
;
929 prev_target_state
= TARGET_RUNNING
;
932 if (cortex_m
->dcb_dhcsr
& S_HALT
) {
933 target
->state
= TARGET_HALTED
;
935 if ((prev_target_state
== TARGET_RUNNING
) || (prev_target_state
== TARGET_RESET
)) {
936 retval
= cortex_m_debug_entry(target
);
937 if (retval
!= ERROR_OK
)
940 if (arm_semihosting(target
, &retval
) != 0)
943 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
945 if (prev_target_state
== TARGET_DEBUG_RUNNING
) {
946 retval
= cortex_m_debug_entry(target
);
947 if (retval
!= ERROR_OK
)
950 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
954 if (target
->state
== TARGET_UNKNOWN
) {
955 /* Check if processor is retiring instructions or sleeping.
956 * Unlike S_RESET_ST here we test if the target *is* running now,
957 * not if it has been running (possibly in the past). Instructions are
958 * typically processed much faster than OpenOCD polls DHCSR so S_RETIRE_ST
959 * is read always 1. That's the reason not to use dcb_dhcsr_cumulated_sticky.
961 if (cortex_m
->dcb_dhcsr
& S_RETIRE_ST
|| cortex_m
->dcb_dhcsr
& S_SLEEP
) {
962 target
->state
= TARGET_RUNNING
;
967 /* Check that target is truly halted, since the target could be resumed externally */
968 if ((prev_target_state
== TARGET_HALTED
) && !(cortex_m
->dcb_dhcsr
& S_HALT
)) {
969 /* registers are now invalid */
970 register_cache_invalidate(armv7m
->arm
.core_cache
);
972 target
->state
= TARGET_RUNNING
;
973 LOG_TARGET_WARNING(target
, "external resume detected");
974 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
978 /* Did we detect a failure condition that we cleared? */
979 if (detected_failure
!= ERROR_OK
)
980 retval
= detected_failure
;
984 static int cortex_m_halt(struct target
*target
)
986 LOG_TARGET_DEBUG(target
, "target->state: %s", target_state_name(target
));
988 if (target
->state
== TARGET_HALTED
) {
989 LOG_TARGET_DEBUG(target
, "target was already halted");
993 if (target
->state
== TARGET_UNKNOWN
)
994 LOG_TARGET_WARNING(target
, "target was in unknown state when halt was requested");
996 if (target
->state
== TARGET_RESET
) {
997 if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST
) && jtag_get_srst()) {
998 LOG_TARGET_ERROR(target
, "can't request a halt while in reset if nSRST pulls nTRST");
999 return ERROR_TARGET_FAILURE
;
1001 /* we came here in a reset_halt or reset_init sequence
1002 * debug entry was already prepared in cortex_m3_assert_reset()
1004 target
->debug_reason
= DBG_REASON_DBGRQ
;
1010 /* Write to Debug Halting Control and Status Register */
1011 cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
1013 /* Do this really early to minimize the window where the MASKINTS erratum
1014 * can pile up pending interrupts. */
1015 cortex_m_set_maskints_for_halt(target
);
1017 target
->debug_reason
= DBG_REASON_DBGRQ
;
1022 static int cortex_m_soft_reset_halt(struct target
*target
)
1024 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1025 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
1026 int retval
, timeout
= 0;
1028 /* on single cortex_m MCU soft_reset_halt should be avoided as same functionality
1029 * can be obtained by using 'reset halt' and 'cortex_m reset_config vectreset'.
1030 * As this reset only uses VC_CORERESET it would only ever reset the cortex_m
1031 * core, not the peripherals */
1032 LOG_TARGET_DEBUG(target
, "soft_reset_halt is discouraged, please use 'reset halt' instead.");
1034 if (!cortex_m
->vectreset_supported
) {
1035 LOG_TARGET_ERROR(target
, "VECTRESET is not supported on this Cortex-M core");
1040 retval
= cortex_m_write_debug_halt_mask(target
, 0, C_STEP
| C_MASKINTS
);
1041 if (retval
!= ERROR_OK
)
1044 /* Enter debug state on reset; restore DEMCR in endreset_event() */
1045 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DEMCR
,
1046 TRCENA
| VC_HARDERR
| VC_BUSERR
| VC_CORERESET
);
1047 if (retval
!= ERROR_OK
)
1050 /* Request a core-only reset */
1051 retval
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, NVIC_AIRCR
,
1052 AIRCR_VECTKEY
| AIRCR_VECTRESET
);
1053 if (retval
!= ERROR_OK
)
1055 target
->state
= TARGET_RESET
;
1057 /* registers are now invalid */
1058 register_cache_invalidate(cortex_m
->armv7m
.arm
.core_cache
);
1060 while (timeout
< 100) {
1061 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
1062 if (retval
== ERROR_OK
) {
1063 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, NVIC_DFSR
,
1064 &cortex_m
->nvic_dfsr
);
1065 if (retval
!= ERROR_OK
)
1067 if ((cortex_m
->dcb_dhcsr
& S_HALT
)
1068 && (cortex_m
->nvic_dfsr
& DFSR_VCATCH
)) {
1069 LOG_TARGET_DEBUG(target
, "system reset-halted, DHCSR 0x%08" PRIx32
", DFSR 0x%08" PRIx32
,
1070 cortex_m
->dcb_dhcsr
, cortex_m
->nvic_dfsr
);
1071 cortex_m_poll(target
);
1072 /* FIXME restore user's vector catch config */
1075 LOG_TARGET_DEBUG(target
, "waiting for system reset-halt, "
1076 "DHCSR 0x%08" PRIx32
", %d ms",
1077 cortex_m
->dcb_dhcsr
, timeout
);
1087 void cortex_m_enable_breakpoints(struct target
*target
)
1089 struct breakpoint
*breakpoint
= target
->breakpoints
;
1091 /* set any pending breakpoints */
1092 while (breakpoint
) {
1093 if (!breakpoint
->is_set
)
1094 cortex_m_set_breakpoint(target
, breakpoint
);
1095 breakpoint
= breakpoint
->next
;
1099 static int cortex_m_resume(struct target
*target
, int current
,
1100 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
1102 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
1103 struct breakpoint
*breakpoint
= NULL
;
1107 if (target
->state
!= TARGET_HALTED
) {
1108 LOG_TARGET_WARNING(target
, "target not halted");
1109 return ERROR_TARGET_NOT_HALTED
;
1112 if (!debug_execution
) {
1113 target_free_all_working_areas(target
);
1114 cortex_m_enable_breakpoints(target
);
1115 cortex_m_enable_watchpoints(target
);
1118 if (debug_execution
) {
1119 r
= armv7m
->arm
.core_cache
->reg_list
+ ARMV7M_PRIMASK
;
1121 /* Disable interrupts */
1122 /* We disable interrupts in the PRIMASK register instead of
1123 * masking with C_MASKINTS. This is probably the same issue
1124 * as Cortex-M3 Erratum 377493 (fixed in r1p0): C_MASKINTS
1125 * in parallel with disabled interrupts can cause local faults
1128 * This breaks non-debug (application) execution if not
1129 * called from armv7m_start_algorithm() which saves registers.
1131 buf_set_u32(r
->value
, 0, 1, 1);
1135 /* Make sure we are in Thumb mode, set xPSR.T bit */
1136 /* armv7m_start_algorithm() initializes entire xPSR register.
1137 * This duplicity handles the case when cortex_m_resume()
1138 * is used with the debug_execution flag directly,
1139 * not called through armv7m_start_algorithm().
1141 r
= armv7m
->arm
.cpsr
;
1142 buf_set_u32(r
->value
, 24, 1, 1);
1147 /* current = 1: continue on current pc, otherwise continue at <address> */
1150 buf_set_u32(r
->value
, 0, 32, address
);
1155 /* if we halted last time due to a bkpt instruction
1156 * then we have to manually step over it, otherwise
1157 * the core will break again */
1159 if (!breakpoint_find(target
, buf_get_u32(r
->value
, 0, 32))
1160 && !debug_execution
)
1161 armv7m_maybe_skip_bkpt_inst(target
, NULL
);
1163 resume_pc
= buf_get_u32(r
->value
, 0, 32);
1165 armv7m_restore_context(target
);
1167 /* the front-end may request us not to handle breakpoints */
1168 if (handle_breakpoints
) {
1169 /* Single step past breakpoint at current address */
1170 breakpoint
= breakpoint_find(target
, resume_pc
);
1172 LOG_TARGET_DEBUG(target
, "unset breakpoint at " TARGET_ADDR_FMT
" (ID: %" PRIu32
")",
1173 breakpoint
->address
,
1174 breakpoint
->unique_id
);
1175 cortex_m_unset_breakpoint(target
, breakpoint
);
1176 cortex_m_single_step_core(target
);
1177 cortex_m_set_breakpoint(target
, breakpoint
);
1182 cortex_m_set_maskints_for_run(target
);
1183 cortex_m_write_debug_halt_mask(target
, 0, C_HALT
);
1185 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1187 /* registers are now invalid */
1188 register_cache_invalidate(armv7m
->arm
.core_cache
);
1190 if (!debug_execution
) {
1191 target
->state
= TARGET_RUNNING
;
1192 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1193 LOG_TARGET_DEBUG(target
, "target resumed at 0x%" PRIx32
"", resume_pc
);
1195 target
->state
= TARGET_DEBUG_RUNNING
;
1196 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1197 LOG_TARGET_DEBUG(target
, "target debug resumed at 0x%" PRIx32
"", resume_pc
);
1203 /* int irqstepcount = 0; */
1204 static int cortex_m_step(struct target
*target
, int current
,
1205 target_addr_t address
, int handle_breakpoints
)
1207 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1208 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
1209 struct breakpoint
*breakpoint
= NULL
;
1210 struct reg
*pc
= armv7m
->arm
.pc
;
1211 bool bkpt_inst_found
= false;
1213 bool isr_timed_out
= false;
1215 if (target
->state
!= TARGET_HALTED
) {
1216 LOG_TARGET_WARNING(target
, "target not halted");
1217 return ERROR_TARGET_NOT_HALTED
;
1220 /* current = 1: continue on current pc, otherwise continue at <address> */
1222 buf_set_u32(pc
->value
, 0, 32, address
);
1227 uint32_t pc_value
= buf_get_u32(pc
->value
, 0, 32);
1229 /* the front-end may request us not to handle breakpoints */
1230 if (handle_breakpoints
) {
1231 breakpoint
= breakpoint_find(target
, pc_value
);
1233 cortex_m_unset_breakpoint(target
, breakpoint
);
1236 armv7m_maybe_skip_bkpt_inst(target
, &bkpt_inst_found
);
1238 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1240 armv7m_restore_context(target
);
1242 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1244 /* if no bkpt instruction is found at pc then we can perform
1245 * a normal step, otherwise we have to manually step over the bkpt
1246 * instruction - as such simulate a step */
1247 if (bkpt_inst_found
== false) {
1248 if (cortex_m
->isrmasking_mode
!= CORTEX_M_ISRMASK_AUTO
) {
1249 /* Automatic ISR masking mode off: Just step over the next
1250 * instruction, with interrupts on or off as appropriate. */
1251 cortex_m_set_maskints_for_step(target
);
1252 cortex_m_write_debug_halt_mask(target
, C_STEP
, C_HALT
);
1254 /* Process interrupts during stepping in a way they don't interfere
1259 * Set a temporary break point at the current pc and let the core run
1260 * with interrupts enabled. Pending interrupts get served and we run
1261 * into the breakpoint again afterwards. Then we step over the next
1262 * instruction with interrupts disabled.
1264 * If the pending interrupts don't complete within time, we leave the
1265 * core running. This may happen if the interrupts trigger faster
1266 * than the core can process them or the handler doesn't return.
1268 * If no more breakpoints are available we simply do a step with
1269 * interrupts enabled.
1275 * If a break point is already set on the lower half word then a break point on
1276 * the upper half word will not break again when the core is restarted. So we
1277 * just step over the instruction with interrupts disabled.
1279 * The documentation has no information about this, it was found by observation
1280 * on STM32F1 and STM32F2. Proper explanation welcome. STM32F0 doesn't seem to
1281 * suffer from this problem.
1283 * To add some confusion: pc_value has bit 0 always set, while the breakpoint
1284 * address has it always cleared. The former is done to indicate thumb mode
1288 if ((pc_value
& 0x02) && breakpoint_find(target
, pc_value
& ~0x03)) {
1289 LOG_TARGET_DEBUG(target
, "Stepping over next instruction with interrupts disabled");
1290 cortex_m_write_debug_halt_mask(target
, C_HALT
| C_MASKINTS
, 0);
1291 cortex_m_write_debug_halt_mask(target
, C_STEP
, C_HALT
);
1292 /* Re-enable interrupts if appropriate */
1293 cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
1294 cortex_m_set_maskints_for_halt(target
);
1297 /* Set a temporary break point */
1299 retval
= cortex_m_set_breakpoint(target
, breakpoint
);
1301 enum breakpoint_type type
= BKPT_HARD
;
1302 if (cortex_m
->fp_rev
== 0 && pc_value
> 0x1FFFFFFF) {
1303 /* FPB rev.1 cannot handle such addr, try BKPT instr */
1306 retval
= breakpoint_add(target
, pc_value
, 2, type
);
1309 bool tmp_bp_set
= (retval
== ERROR_OK
);
1311 /* No more breakpoints left, just do a step */
1313 cortex_m_set_maskints_for_step(target
);
1314 cortex_m_write_debug_halt_mask(target
, C_STEP
, C_HALT
);
1315 /* Re-enable interrupts if appropriate */
1316 cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
1317 cortex_m_set_maskints_for_halt(target
);
1319 /* Start the core */
1320 LOG_TARGET_DEBUG(target
, "Starting core to serve pending interrupts");
1321 int64_t t_start
= timeval_ms();
1322 cortex_m_set_maskints_for_run(target
);
1323 cortex_m_write_debug_halt_mask(target
, 0, C_HALT
| C_STEP
);
1325 /* Wait for pending handlers to complete or timeout */
1327 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
1328 if (retval
!= ERROR_OK
) {
1329 target
->state
= TARGET_UNKNOWN
;
1332 isr_timed_out
= ((timeval_ms() - t_start
) > 500);
1333 } while (!((cortex_m
->dcb_dhcsr
& S_HALT
) || isr_timed_out
));
1335 /* only remove breakpoint if we created it */
1337 cortex_m_unset_breakpoint(target
, breakpoint
);
1339 /* Remove the temporary breakpoint */
1340 breakpoint_remove(target
, pc_value
);
1343 if (isr_timed_out
) {
1344 LOG_TARGET_DEBUG(target
, "Interrupt handlers didn't complete within time, "
1345 "leaving target running");
1347 /* Step over next instruction with interrupts disabled */
1348 cortex_m_set_maskints_for_step(target
);
1349 cortex_m_write_debug_halt_mask(target
,
1350 C_HALT
| C_MASKINTS
,
1352 cortex_m_write_debug_halt_mask(target
, C_STEP
, C_HALT
);
1353 /* Re-enable interrupts if appropriate */
1354 cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
1355 cortex_m_set_maskints_for_halt(target
);
1362 retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
1363 if (retval
!= ERROR_OK
)
1366 /* registers are now invalid */
1367 register_cache_invalidate(armv7m
->arm
.core_cache
);
1370 cortex_m_set_breakpoint(target
, breakpoint
);
1372 if (isr_timed_out
) {
1373 /* Leave the core running. The user has to stop execution manually. */
1374 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1375 target
->state
= TARGET_RUNNING
;
1379 LOG_TARGET_DEBUG(target
, "target stepped dcb_dhcsr = 0x%" PRIx32
1380 " nvic_icsr = 0x%" PRIx32
,
1381 cortex_m
->dcb_dhcsr
, cortex_m
->nvic_icsr
);
1383 retval
= cortex_m_debug_entry(target
);
1384 if (retval
!= ERROR_OK
)
1386 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1388 LOG_TARGET_DEBUG(target
, "target stepped dcb_dhcsr = 0x%" PRIx32
1389 " nvic_icsr = 0x%" PRIx32
,
1390 cortex_m
->dcb_dhcsr
, cortex_m
->nvic_icsr
);
1395 static int cortex_m_assert_reset(struct target
*target
)
1397 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1398 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
1399 enum cortex_m_soft_reset_config reset_config
= cortex_m
->soft_reset_config
;
1401 LOG_TARGET_DEBUG(target
, "target->state: %s",
1402 target_state_name(target
));
1404 enum reset_types jtag_reset_config
= jtag_get_reset_config();
1406 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
)) {
1407 /* allow scripts to override the reset event */
1409 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1410 register_cache_invalidate(cortex_m
->armv7m
.arm
.core_cache
);
1411 target
->state
= TARGET_RESET
;
1416 /* some cores support connecting while srst is asserted
1417 * use that mode is it has been configured */
1419 bool srst_asserted
= false;
1421 if (!target_was_examined(target
)) {
1422 if (jtag_reset_config
& RESET_HAS_SRST
) {
1423 adapter_assert_reset();
1424 if (target
->reset_halt
)
1425 LOG_TARGET_ERROR(target
, "Target not examined, will not halt after reset!");
1428 LOG_TARGET_ERROR(target
, "Target not examined, reset NOT asserted!");
1433 if ((jtag_reset_config
& RESET_HAS_SRST
) &&
1434 (jtag_reset_config
& RESET_SRST_NO_GATING
)) {
1435 adapter_assert_reset();
1436 srst_asserted
= true;
1439 /* Enable debug requests */
1440 int retval
= cortex_m_read_dhcsr_atomic_sticky(target
);
1442 /* Store important errors instead of failing and proceed to reset assert */
1444 if (retval
!= ERROR_OK
|| !(cortex_m
->dcb_dhcsr
& C_DEBUGEN
))
1445 retval
= cortex_m_write_debug_halt_mask(target
, 0, C_HALT
| C_STEP
| C_MASKINTS
);
1447 /* If the processor is sleeping in a WFI or WFE instruction, the
1448 * C_HALT bit must be asserted to regain control */
1449 if (retval
== ERROR_OK
&& (cortex_m
->dcb_dhcsr
& S_SLEEP
))
1450 retval
= cortex_m_write_debug_halt_mask(target
, C_HALT
, 0);
1452 mem_ap_write_u32(armv7m
->debug_ap
, DCB_DCRDR
, 0);
1453 /* Ignore less important errors */
1455 if (!target
->reset_halt
) {
1456 /* Set/Clear C_MASKINTS in a separate operation */
1457 cortex_m_set_maskints_for_run(target
);
1459 /* clear any debug flags before resuming */
1460 cortex_m_clear_halt(target
);
1462 /* clear C_HALT in dhcsr reg */
1463 cortex_m_write_debug_halt_mask(target
, 0, C_HALT
);
1465 /* Halt in debug on reset; endreset_event() restores DEMCR.
1467 * REVISIT catching BUSERR presumably helps to defend against
1468 * bad vector table entries. Should this include MMERR or
1472 retval2
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, DCB_DEMCR
,
1473 TRCENA
| VC_HARDERR
| VC_BUSERR
| VC_CORERESET
);
1474 if (retval
!= ERROR_OK
|| retval2
!= ERROR_OK
)
1475 LOG_TARGET_INFO(target
, "AP write error, reset will not halt");
1478 if (jtag_reset_config
& RESET_HAS_SRST
) {
1479 /* default to asserting srst */
1481 adapter_assert_reset();
1483 /* srst is asserted, ignore AP access errors */
1486 /* Use a standard Cortex-M3 software reset mechanism.
1487 * We default to using VECTRESET as it is supported on all current cores
1488 * (except Cortex-M0, M0+ and M1 which support SYSRESETREQ only!)
1489 * This has the disadvantage of not resetting the peripherals, so a
1490 * reset-init event handler is needed to perform any peripheral resets.
1492 if (!cortex_m
->vectreset_supported
1493 && reset_config
== CORTEX_M_RESET_VECTRESET
) {
1494 reset_config
= CORTEX_M_RESET_SYSRESETREQ
;
1495 LOG_TARGET_WARNING(target
, "VECTRESET is not supported on this Cortex-M core, using SYSRESETREQ instead.");
1496 LOG_TARGET_WARNING(target
, "Set 'cortex_m reset_config sysresetreq'.");
1499 LOG_TARGET_DEBUG(target
, "Using Cortex-M %s", (reset_config
== CORTEX_M_RESET_SYSRESETREQ
)
1500 ? "SYSRESETREQ" : "VECTRESET");
1502 if (reset_config
== CORTEX_M_RESET_VECTRESET
) {
1503 LOG_TARGET_WARNING(target
, "Only resetting the Cortex-M core, use a reset-init event "
1504 "handler to reset any peripherals or configure hardware srst support.");
1508 retval3
= mem_ap_write_atomic_u32(armv7m
->debug_ap
, NVIC_AIRCR
,
1509 AIRCR_VECTKEY
| ((reset_config
== CORTEX_M_RESET_SYSRESETREQ
)
1510 ? AIRCR_SYSRESETREQ
: AIRCR_VECTRESET
));
1511 if (retval3
!= ERROR_OK
)
1512 LOG_TARGET_DEBUG(target
, "Ignoring AP write error right after reset");
1514 retval3
= dap_dp_init_or_reconnect(armv7m
->debug_ap
->dap
);
1515 if (retval3
!= ERROR_OK
) {
1516 LOG_TARGET_ERROR(target
, "DP initialisation failed");
1517 /* The error return value must not be propagated in this case.
1518 * SYSRESETREQ or VECTRESET have been possibly triggered
1519 * so reset processing should continue */
1521 /* I do not know why this is necessary, but it
1522 * fixes strange effects (step/resume cause NMI
1523 * after reset) on LM3S6918 -- Michael Schwingen
1526 mem_ap_read_atomic_u32(armv7m
->debug_ap
, NVIC_AIRCR
, &tmp
);
1530 target
->state
= TARGET_RESET
;
1533 register_cache_invalidate(cortex_m
->armv7m
.arm
.core_cache
);
1535 /* now return stored error code if any */
1536 if (retval
!= ERROR_OK
)
1539 if (target
->reset_halt
) {
1540 retval
= target_halt(target
);
1541 if (retval
!= ERROR_OK
)
1548 static int cortex_m_deassert_reset(struct target
*target
)
1550 struct armv7m_common
*armv7m
= &target_to_cm(target
)->armv7m
;
1552 LOG_TARGET_DEBUG(target
, "target->state: %s",
1553 target_state_name(target
));
1555 /* deassert reset lines */
1556 adapter_deassert_reset();
1558 enum reset_types jtag_reset_config
= jtag_get_reset_config();
1560 if ((jtag_reset_config
& RESET_HAS_SRST
) &&
1561 !(jtag_reset_config
& RESET_SRST_NO_GATING
) &&
1562 target_was_examined(target
)) {
1564 int retval
= dap_dp_init_or_reconnect(armv7m
->debug_ap
->dap
);
1565 if (retval
!= ERROR_OK
) {
1566 LOG_TARGET_ERROR(target
, "DP initialisation failed");
1574 int cortex_m_set_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1577 unsigned int fp_num
= 0;
1578 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1579 struct cortex_m_fp_comparator
*comparator_list
= cortex_m
->fp_comparator_list
;
1581 if (breakpoint
->is_set
) {
1582 LOG_TARGET_WARNING(target
, "breakpoint (BPID: %" PRIu32
") already set", breakpoint
->unique_id
);
1586 if (breakpoint
->type
== BKPT_HARD
) {
1587 uint32_t fpcr_value
;
1588 while (comparator_list
[fp_num
].used
&& (fp_num
< cortex_m
->fp_num_code
))
1590 if (fp_num
>= cortex_m
->fp_num_code
) {
1591 LOG_TARGET_ERROR(target
, "Can not find free FPB Comparator!");
1592 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1594 breakpoint_hw_set(breakpoint
, fp_num
);
1595 fpcr_value
= breakpoint
->address
| 1;
1596 if (cortex_m
->fp_rev
== 0) {
1597 if (breakpoint
->address
> 0x1FFFFFFF) {
1598 LOG_TARGET_ERROR(target
, "Cortex-M Flash Patch Breakpoint rev.1 "
1599 "cannot handle HW breakpoint above address 0x1FFFFFFE");
1603 hilo
= (breakpoint
->address
& 0x2) ? FPCR_REPLACE_BKPT_HIGH
: FPCR_REPLACE_BKPT_LOW
;
1604 fpcr_value
= (fpcr_value
& 0x1FFFFFFC) | hilo
| 1;
1605 } else if (cortex_m
->fp_rev
> 1) {
1606 LOG_TARGET_ERROR(target
, "Unhandled Cortex-M Flash Patch Breakpoint architecture revision");
1609 comparator_list
[fp_num
].used
= true;
1610 comparator_list
[fp_num
].fpcr_value
= fpcr_value
;
1611 target_write_u32(target
, comparator_list
[fp_num
].fpcr_address
,
1612 comparator_list
[fp_num
].fpcr_value
);
1613 LOG_TARGET_DEBUG(target
, "fpc_num %i fpcr_value 0x%" PRIx32
"",
1615 comparator_list
[fp_num
].fpcr_value
);
1616 if (!cortex_m
->fpb_enabled
) {
1617 LOG_TARGET_DEBUG(target
, "FPB wasn't enabled, do it now");
1618 retval
= cortex_m_enable_fpb(target
);
1619 if (retval
!= ERROR_OK
) {
1620 LOG_TARGET_ERROR(target
, "Failed to enable the FPB");
1624 cortex_m
->fpb_enabled
= true;
1626 } else if (breakpoint
->type
== BKPT_SOFT
) {
1629 /* NOTE: on ARMv6-M and ARMv7-M, BKPT(0xab) is used for
1630 * semihosting; don't use that. Otherwise the BKPT
1631 * parameter is arbitrary.
1633 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1634 retval
= target_read_memory(target
,
1635 breakpoint
->address
& 0xFFFFFFFE,
1636 breakpoint
->length
, 1,
1637 breakpoint
->orig_instr
);
1638 if (retval
!= ERROR_OK
)
1640 retval
= target_write_memory(target
,
1641 breakpoint
->address
& 0xFFFFFFFE,
1642 breakpoint
->length
, 1,
1644 if (retval
!= ERROR_OK
)
1646 breakpoint
->is_set
= true;
1649 LOG_TARGET_DEBUG(target
, "BPID: %" PRIu32
", Type: %d, Address: " TARGET_ADDR_FMT
" Length: %d (n=%u)",
1650 breakpoint
->unique_id
,
1651 (int)(breakpoint
->type
),
1652 breakpoint
->address
,
1654 (breakpoint
->type
== BKPT_SOFT
) ? 0 : breakpoint
->number
);
1659 int cortex_m_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1662 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1663 struct cortex_m_fp_comparator
*comparator_list
= cortex_m
->fp_comparator_list
;
1665 if (!breakpoint
->is_set
) {
1666 LOG_TARGET_WARNING(target
, "breakpoint not set");
1670 LOG_TARGET_DEBUG(target
, "BPID: %" PRIu32
", Type: %d, Address: " TARGET_ADDR_FMT
" Length: %d (n=%u)",
1671 breakpoint
->unique_id
,
1672 (int)(breakpoint
->type
),
1673 breakpoint
->address
,
1675 (breakpoint
->type
== BKPT_SOFT
) ? 0 : breakpoint
->number
);
1677 if (breakpoint
->type
== BKPT_HARD
) {
1678 unsigned int fp_num
= breakpoint
->number
;
1679 if (fp_num
>= cortex_m
->fp_num_code
) {
1680 LOG_TARGET_DEBUG(target
, "Invalid FP Comparator number in breakpoint");
1683 comparator_list
[fp_num
].used
= false;
1684 comparator_list
[fp_num
].fpcr_value
= 0;
1685 target_write_u32(target
, comparator_list
[fp_num
].fpcr_address
,
1686 comparator_list
[fp_num
].fpcr_value
);
1688 /* restore original instruction (kept in target endianness) */
1689 retval
= target_write_memory(target
, breakpoint
->address
& 0xFFFFFFFE,
1690 breakpoint
->length
, 1,
1691 breakpoint
->orig_instr
);
1692 if (retval
!= ERROR_OK
)
1695 breakpoint
->is_set
= false;
1700 int cortex_m_add_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1702 if (breakpoint
->length
== 3) {
1703 LOG_TARGET_DEBUG(target
, "Using a two byte breakpoint for 32bit Thumb-2 request");
1704 breakpoint
->length
= 2;
1707 if ((breakpoint
->length
!= 2)) {
1708 LOG_TARGET_INFO(target
, "only breakpoints of two bytes length supported");
1709 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1712 return cortex_m_set_breakpoint(target
, breakpoint
);
1715 int cortex_m_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1717 if (!breakpoint
->is_set
)
1720 return cortex_m_unset_breakpoint(target
, breakpoint
);
1723 static int cortex_m_set_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
1725 unsigned int dwt_num
= 0;
1726 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1728 /* REVISIT Don't fully trust these "not used" records ... users
1729 * may set up breakpoints by hand, e.g. dual-address data value
1730 * watchpoint using comparator #1; comparator #0 matching cycle
1731 * count; send data trace info through ITM and TPIU; etc
1733 struct cortex_m_dwt_comparator
*comparator
;
1735 for (comparator
= cortex_m
->dwt_comparator_list
;
1736 comparator
->used
&& dwt_num
< cortex_m
->dwt_num_comp
;
1737 comparator
++, dwt_num
++)
1739 if (dwt_num
>= cortex_m
->dwt_num_comp
) {
1740 LOG_TARGET_ERROR(target
, "Can not find free DWT Comparator");
1743 comparator
->used
= true;
1744 watchpoint_set(watchpoint
, dwt_num
);
1746 comparator
->comp
= watchpoint
->address
;
1747 target_write_u32(target
, comparator
->dwt_comparator_address
+ 0,
1750 if ((cortex_m
->dwt_devarch
& 0x1FFFFF) != DWT_DEVARCH_ARMV8M
) {
1751 uint32_t mask
= 0, temp
;
1753 /* watchpoint params were validated earlier */
1754 temp
= watchpoint
->length
;
1761 comparator
->mask
= mask
;
1762 target_write_u32(target
, comparator
->dwt_comparator_address
+ 4,
1765 switch (watchpoint
->rw
) {
1767 comparator
->function
= 5;
1770 comparator
->function
= 6;
1773 comparator
->function
= 7;
1777 uint32_t data_size
= watchpoint
->length
>> 1;
1778 comparator
->mask
= (watchpoint
->length
>> 1) | 1;
1780 switch (watchpoint
->rw
) {
1782 comparator
->function
= 4;
1785 comparator
->function
= 5;
1788 comparator
->function
= 6;
1791 comparator
->function
= comparator
->function
| (1 << 4) |
1795 target_write_u32(target
, comparator
->dwt_comparator_address
+ 8,
1796 comparator
->function
);
1798 LOG_TARGET_DEBUG(target
, "Watchpoint (ID %d) DWT%d 0x%08x 0x%x 0x%05x",
1799 watchpoint
->unique_id
, dwt_num
,
1800 (unsigned) comparator
->comp
,
1801 (unsigned) comparator
->mask
,
1802 (unsigned) comparator
->function
);
1806 static int cortex_m_unset_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
1808 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1809 struct cortex_m_dwt_comparator
*comparator
;
1811 if (!watchpoint
->is_set
) {
1812 LOG_TARGET_WARNING(target
, "watchpoint (wpid: %d) not set",
1813 watchpoint
->unique_id
);
1817 unsigned int dwt_num
= watchpoint
->number
;
1819 LOG_TARGET_DEBUG(target
, "Watchpoint (ID %d) DWT%u address: 0x%08x clear",
1820 watchpoint
->unique_id
, dwt_num
,
1821 (unsigned) watchpoint
->address
);
1823 if (dwt_num
>= cortex_m
->dwt_num_comp
) {
1824 LOG_TARGET_DEBUG(target
, "Invalid DWT Comparator number in watchpoint");
1828 comparator
= cortex_m
->dwt_comparator_list
+ dwt_num
;
1829 comparator
->used
= false;
1830 comparator
->function
= 0;
1831 target_write_u32(target
, comparator
->dwt_comparator_address
+ 8,
1832 comparator
->function
);
1834 watchpoint
->is_set
= false;
1839 int cortex_m_add_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
1841 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1843 if (cortex_m
->dwt_comp_available
< 1) {
1844 LOG_TARGET_DEBUG(target
, "no comparators?");
1845 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1848 /* hardware doesn't support data value masking */
1849 if (watchpoint
->mask
!= ~(uint32_t)0) {
1850 LOG_TARGET_DEBUG(target
, "watchpoint value masks not supported");
1851 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1854 /* hardware allows address masks of up to 32K */
1857 for (mask
= 0; mask
< 16; mask
++) {
1858 if ((1u << mask
) == watchpoint
->length
)
1862 LOG_TARGET_DEBUG(target
, "unsupported watchpoint length");
1863 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1865 if (watchpoint
->address
& ((1 << mask
) - 1)) {
1866 LOG_TARGET_DEBUG(target
, "watchpoint address is unaligned");
1867 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1870 /* Caller doesn't seem to be able to describe watching for data
1871 * values of zero; that flags "no value".
1873 * REVISIT This DWT may well be able to watch for specific data
1874 * values. Requires comparator #1 to set DATAVMATCH and match
1875 * the data, and another comparator (DATAVADDR0) matching addr.
1877 if (watchpoint
->value
) {
1878 LOG_TARGET_DEBUG(target
, "data value watchpoint not YET supported");
1879 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1882 cortex_m
->dwt_comp_available
--;
1883 LOG_TARGET_DEBUG(target
, "dwt_comp_available: %d", cortex_m
->dwt_comp_available
);
1888 int cortex_m_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
1890 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1892 /* REVISIT why check? DWT can be updated with core running ... */
1893 if (target
->state
!= TARGET_HALTED
) {
1894 LOG_TARGET_WARNING(target
, "target not halted");
1895 return ERROR_TARGET_NOT_HALTED
;
1898 if (watchpoint
->is_set
)
1899 cortex_m_unset_watchpoint(target
, watchpoint
);
1901 cortex_m
->dwt_comp_available
++;
1902 LOG_TARGET_DEBUG(target
, "dwt_comp_available: %d", cortex_m
->dwt_comp_available
);
1907 int cortex_m_hit_watchpoint(struct target
*target
, struct watchpoint
**hit_watchpoint
)
1909 if (target
->debug_reason
!= DBG_REASON_WATCHPOINT
)
1912 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1914 for (struct watchpoint
*wp
= target
->watchpoints
; wp
; wp
= wp
->next
) {
1918 unsigned int dwt_num
= wp
->number
;
1919 struct cortex_m_dwt_comparator
*comparator
= cortex_m
->dwt_comparator_list
+ dwt_num
;
1921 uint32_t dwt_function
;
1922 int retval
= target_read_u32(target
, comparator
->dwt_comparator_address
+ 8, &dwt_function
);
1923 if (retval
!= ERROR_OK
)
1926 /* check the MATCHED bit */
1927 if (dwt_function
& BIT(24)) {
1928 *hit_watchpoint
= wp
;
1936 void cortex_m_enable_watchpoints(struct target
*target
)
1938 struct watchpoint
*watchpoint
= target
->watchpoints
;
1940 /* set any pending watchpoints */
1941 while (watchpoint
) {
1942 if (!watchpoint
->is_set
)
1943 cortex_m_set_watchpoint(target
, watchpoint
);
1944 watchpoint
= watchpoint
->next
;
1948 static int cortex_m_read_memory(struct target
*target
, target_addr_t address
,
1949 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1951 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
1953 if (armv7m
->arm
.arch
== ARM_ARCH_V6M
) {
1954 /* armv6m does not handle unaligned memory access */
1955 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1956 return ERROR_TARGET_UNALIGNED_ACCESS
;
1959 return mem_ap_read_buf(armv7m
->debug_ap
, buffer
, size
, count
, address
);
1962 static int cortex_m_write_memory(struct target
*target
, target_addr_t address
,
1963 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
1965 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
1967 if (armv7m
->arm
.arch
== ARM_ARCH_V6M
) {
1968 /* armv6m does not handle unaligned memory access */
1969 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1970 return ERROR_TARGET_UNALIGNED_ACCESS
;
1973 return mem_ap_write_buf(armv7m
->debug_ap
, buffer
, size
, count
, address
);
1976 static int cortex_m_init_target(struct command_context
*cmd_ctx
,
1977 struct target
*target
)
1979 armv7m_build_reg_cache(target
);
1980 arm_semihosting_init(target
);
1984 void cortex_m_deinit_target(struct target
*target
)
1986 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
1988 free(cortex_m
->fp_comparator_list
);
1990 cortex_m_dwt_free(target
);
1991 armv7m_free_reg_cache(target
);
1993 free(target
->private_config
);
1997 int cortex_m_profiling(struct target
*target
, uint32_t *samples
,
1998 uint32_t max_num_samples
, uint32_t *num_samples
, uint32_t seconds
)
2000 struct timeval timeout
, now
;
2001 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
2005 retval
= target_read_u32(target
, DWT_PCSR
, ®_value
);
2006 if (retval
!= ERROR_OK
) {
2007 LOG_TARGET_ERROR(target
, "Error while reading PCSR");
2010 if (reg_value
== 0) {
2011 LOG_TARGET_INFO(target
, "PCSR sampling not supported on this processor.");
2012 return target_profiling_default(target
, samples
, max_num_samples
, num_samples
, seconds
);
2015 gettimeofday(&timeout
, NULL
);
2016 timeval_add_time(&timeout
, seconds
, 0);
2018 LOG_TARGET_INFO(target
, "Starting Cortex-M profiling. Sampling DWT_PCSR as fast as we can...");
2020 /* Make sure the target is running */
2021 target_poll(target
);
2022 if (target
->state
== TARGET_HALTED
)
2023 retval
= target_resume(target
, 1, 0, 0, 0);
2025 if (retval
!= ERROR_OK
) {
2026 LOG_TARGET_ERROR(target
, "Error while resuming target");
2030 uint32_t sample_count
= 0;
2033 if (armv7m
&& armv7m
->debug_ap
) {
2034 uint32_t read_count
= max_num_samples
- sample_count
;
2035 if (read_count
> 1024)
2038 retval
= mem_ap_read_buf_noincr(armv7m
->debug_ap
,
2039 (void *)&samples
[sample_count
],
2040 4, read_count
, DWT_PCSR
);
2041 sample_count
+= read_count
;
2043 target_read_u32(target
, DWT_PCSR
, &samples
[sample_count
++]);
2046 if (retval
!= ERROR_OK
) {
2047 LOG_TARGET_ERROR(target
, "Error while reading PCSR");
2052 gettimeofday(&now
, NULL
);
2053 if (sample_count
>= max_num_samples
|| timeval_compare(&now
, &timeout
) > 0) {
2054 LOG_TARGET_INFO(target
, "Profiling completed. %" PRIu32
" samples.", sample_count
);
2059 *num_samples
= sample_count
;
2064 /* REVISIT cache valid/dirty bits are unmaintained. We could set "valid"
2065 * on r/w if the core is not running, and clear on resume or reset ... or
2066 * at least, in a post_restore_context() method.
2069 struct dwt_reg_state
{
2070 struct target
*target
;
2072 uint8_t value
[4]; /* scratch/cache */
2075 static int cortex_m_dwt_get_reg(struct reg
*reg
)
2077 struct dwt_reg_state
*state
= reg
->arch_info
;
2080 int retval
= target_read_u32(state
->target
, state
->addr
, &tmp
);
2081 if (retval
!= ERROR_OK
)
2084 buf_set_u32(state
->value
, 0, 32, tmp
);
2088 static int cortex_m_dwt_set_reg(struct reg
*reg
, uint8_t *buf
)
2090 struct dwt_reg_state
*state
= reg
->arch_info
;
2092 return target_write_u32(state
->target
, state
->addr
,
2093 buf_get_u32(buf
, 0, reg
->size
));
2102 static const struct dwt_reg dwt_base_regs
[] = {
2103 { DWT_CTRL
, "dwt_ctrl", 32, },
2104 /* NOTE that Erratum 532314 (fixed r2p0) affects CYCCNT: it wrongly
2105 * increments while the core is asleep.
2107 { DWT_CYCCNT
, "dwt_cyccnt", 32, },
2108 /* plus some 8 bit counters, useful for profiling with TPIU */
2111 static const struct dwt_reg dwt_comp
[] = {
2112 #define DWT_COMPARATOR(i) \
2113 { DWT_COMP0 + 0x10 * (i), "dwt_" #i "_comp", 32, }, \
2114 { DWT_MASK0 + 0x10 * (i), "dwt_" #i "_mask", 4, }, \
2115 { DWT_FUNCTION0 + 0x10 * (i), "dwt_" #i "_function", 32, }
2132 #undef DWT_COMPARATOR
2135 static const struct reg_arch_type dwt_reg_type
= {
2136 .get
= cortex_m_dwt_get_reg
,
2137 .set
= cortex_m_dwt_set_reg
,
2140 static void cortex_m_dwt_addreg(struct target
*t
, struct reg
*r
, const struct dwt_reg
*d
)
2142 struct dwt_reg_state
*state
;
2144 state
= calloc(1, sizeof(*state
));
2147 state
->addr
= d
->addr
;
2152 r
->value
= state
->value
;
2153 r
->arch_info
= state
;
2154 r
->type
= &dwt_reg_type
;
2157 static void cortex_m_dwt_setup(struct cortex_m_common
*cm
, struct target
*target
)
2160 struct reg_cache
*cache
;
2161 struct cortex_m_dwt_comparator
*comparator
;
2164 target_read_u32(target
, DWT_CTRL
, &dwtcr
);
2165 LOG_TARGET_DEBUG(target
, "DWT_CTRL: 0x%" PRIx32
, dwtcr
);
2167 LOG_TARGET_DEBUG(target
, "no DWT");
2171 target_read_u32(target
, DWT_DEVARCH
, &cm
->dwt_devarch
);
2172 LOG_TARGET_DEBUG(target
, "DWT_DEVARCH: 0x%" PRIx32
, cm
->dwt_devarch
);
2174 cm
->dwt_num_comp
= (dwtcr
>> 28) & 0xF;
2175 cm
->dwt_comp_available
= cm
->dwt_num_comp
;
2176 cm
->dwt_comparator_list
= calloc(cm
->dwt_num_comp
,
2177 sizeof(struct cortex_m_dwt_comparator
));
2178 if (!cm
->dwt_comparator_list
) {
2180 cm
->dwt_num_comp
= 0;
2181 LOG_TARGET_ERROR(target
, "out of mem");
2185 cache
= calloc(1, sizeof(*cache
));
2188 free(cm
->dwt_comparator_list
);
2191 cache
->name
= "Cortex-M DWT registers";
2192 cache
->num_regs
= 2 + cm
->dwt_num_comp
* 3;
2193 cache
->reg_list
= calloc(cache
->num_regs
, sizeof(*cache
->reg_list
));
2194 if (!cache
->reg_list
) {
2199 for (reg
= 0; reg
< 2; reg
++)
2200 cortex_m_dwt_addreg(target
, cache
->reg_list
+ reg
,
2201 dwt_base_regs
+ reg
);
2203 comparator
= cm
->dwt_comparator_list
;
2204 for (unsigned int i
= 0; i
< cm
->dwt_num_comp
; i
++, comparator
++) {
2207 comparator
->dwt_comparator_address
= DWT_COMP0
+ 0x10 * i
;
2208 for (j
= 0; j
< 3; j
++, reg
++)
2209 cortex_m_dwt_addreg(target
, cache
->reg_list
+ reg
,
2210 dwt_comp
+ 3 * i
+ j
);
2212 /* make sure we clear any watchpoints enabled on the target */
2213 target_write_u32(target
, comparator
->dwt_comparator_address
+ 8, 0);
2216 *register_get_last_cache_p(&target
->reg_cache
) = cache
;
2217 cm
->dwt_cache
= cache
;
2219 LOG_TARGET_DEBUG(target
, "DWT dwtcr 0x%" PRIx32
", comp %d, watch%s",
2220 dwtcr
, cm
->dwt_num_comp
,
2221 (dwtcr
& (0xf << 24)) ? " only" : "/trigger");
2223 /* REVISIT: if num_comp > 1, check whether comparator #1 can
2224 * implement single-address data value watchpoints ... so we
2225 * won't need to check it later, when asked to set one up.
2229 static void cortex_m_dwt_free(struct target
*target
)
2231 struct cortex_m_common
*cm
= target_to_cm(target
);
2232 struct reg_cache
*cache
= cm
->dwt_cache
;
2234 free(cm
->dwt_comparator_list
);
2235 cm
->dwt_comparator_list
= NULL
;
2236 cm
->dwt_num_comp
= 0;
2239 register_unlink_cache(&target
->reg_cache
, cache
);
2241 if (cache
->reg_list
) {
2242 for (size_t i
= 0; i
< cache
->num_regs
; i
++)
2243 free(cache
->reg_list
[i
].arch_info
);
2244 free(cache
->reg_list
);
2248 cm
->dwt_cache
= NULL
;
2251 #define MVFR0 0xe000ef40
2252 #define MVFR1 0xe000ef44
2254 #define MVFR0_DEFAULT_M4 0x10110021
2255 #define MVFR1_DEFAULT_M4 0x11000011
2257 #define MVFR0_DEFAULT_M7_SP 0x10110021
2258 #define MVFR0_DEFAULT_M7_DP 0x10110221
2259 #define MVFR1_DEFAULT_M7_SP 0x11000011
2260 #define MVFR1_DEFAULT_M7_DP 0x12000011
2262 static int cortex_m_find_mem_ap(struct adiv5_dap
*swjdp
,
2263 struct adiv5_ap
**debug_ap
)
2265 if (dap_find_ap(swjdp
, AP_TYPE_AHB3_AP
, debug_ap
) == ERROR_OK
)
2268 return dap_find_ap(swjdp
, AP_TYPE_AHB5_AP
, debug_ap
);
2271 int cortex_m_examine(struct target
*target
)
2274 uint32_t cpuid
, fpcr
, mvfr0
, mvfr1
;
2275 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
2276 struct adiv5_dap
*swjdp
= cortex_m
->armv7m
.arm
.dap
;
2277 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
2279 /* hla_target shares the examine handler but does not support
2281 if (!armv7m
->is_hla_target
) {
2282 if (cortex_m
->apsel
== DP_APSEL_INVALID
) {
2283 /* Search for the MEM-AP */
2284 retval
= cortex_m_find_mem_ap(swjdp
, &armv7m
->debug_ap
);
2285 if (retval
!= ERROR_OK
) {
2286 LOG_TARGET_ERROR(target
, "Could not find MEM-AP to control the core");
2290 armv7m
->debug_ap
= dap_ap(swjdp
, cortex_m
->apsel
);
2293 armv7m
->debug_ap
->memaccess_tck
= 8;
2295 retval
= mem_ap_init(armv7m
->debug_ap
);
2296 if (retval
!= ERROR_OK
)
2300 if (!target_was_examined(target
)) {
2301 target_set_examined(target
);
2303 /* Read from Device Identification Registers */
2304 retval
= target_read_u32(target
, CPUID
, &cpuid
);
2305 if (retval
!= ERROR_OK
)
2308 /* Get ARCH and CPU types */
2309 const enum cortex_m_partno core_partno
= (cpuid
& ARM_CPUID_PARTNO_MASK
) >> ARM_CPUID_PARTNO_POS
;
2311 for (unsigned int n
= 0; n
< ARRAY_SIZE(cortex_m_parts
); n
++) {
2312 if (core_partno
== cortex_m_parts
[n
].partno
) {
2313 cortex_m
->core_info
= &cortex_m_parts
[n
];
2318 if (!cortex_m
->core_info
) {
2319 LOG_TARGET_ERROR(target
, "Cortex-M PARTNO 0x%x is unrecognized", core_partno
);
2323 armv7m
->arm
.arch
= cortex_m
->core_info
->arch
;
2325 LOG_TARGET_INFO(target
, "%s r%" PRId8
"p%" PRId8
" processor detected",
2326 cortex_m
->core_info
->name
,
2327 (uint8_t)((cpuid
>> 20) & 0xf),
2328 (uint8_t)((cpuid
>> 0) & 0xf));
2330 cortex_m
->maskints_erratum
= false;
2331 if (core_partno
== CORTEX_M7_PARTNO
) {
2333 rev
= (cpuid
>> 20) & 0xf;
2334 patch
= (cpuid
>> 0) & 0xf;
2335 if ((rev
== 0) && (patch
< 2)) {
2336 LOG_TARGET_WARNING(target
, "Silicon bug: single stepping may enter pending exception handler!");
2337 cortex_m
->maskints_erratum
= true;
2340 LOG_TARGET_DEBUG(target
, "cpuid: 0x%8.8" PRIx32
"", cpuid
);
2342 if (cortex_m
->core_info
->flags
& CORTEX_M_F_HAS_FPV4
) {
2343 target_read_u32(target
, MVFR0
, &mvfr0
);
2344 target_read_u32(target
, MVFR1
, &mvfr1
);
2346 /* test for floating point feature on Cortex-M4 */
2347 if ((mvfr0
== MVFR0_DEFAULT_M4
) && (mvfr1
== MVFR1_DEFAULT_M4
)) {
2348 LOG_TARGET_DEBUG(target
, "%s floating point feature FPv4_SP found", cortex_m
->core_info
->name
);
2349 armv7m
->fp_feature
= FPV4_SP
;
2351 } else if (cortex_m
->core_info
->flags
& CORTEX_M_F_HAS_FPV5
) {
2352 target_read_u32(target
, MVFR0
, &mvfr0
);
2353 target_read_u32(target
, MVFR1
, &mvfr1
);
2355 /* test for floating point features on Cortex-M7 */
2356 if ((mvfr0
== MVFR0_DEFAULT_M7_SP
) && (mvfr1
== MVFR1_DEFAULT_M7_SP
)) {
2357 LOG_TARGET_DEBUG(target
, "%s floating point feature FPv5_SP found", cortex_m
->core_info
->name
);
2358 armv7m
->fp_feature
= FPV5_SP
;
2359 } else if ((mvfr0
== MVFR0_DEFAULT_M7_DP
) && (mvfr1
== MVFR1_DEFAULT_M7_DP
)) {
2360 LOG_TARGET_DEBUG(target
, "%s floating point feature FPv5_DP found", cortex_m
->core_info
->name
);
2361 armv7m
->fp_feature
= FPV5_DP
;
2365 /* VECTRESET is supported only on ARMv7-M cores */
2366 cortex_m
->vectreset_supported
= armv7m
->arm
.arch
== ARM_ARCH_V7M
;
2368 /* Check for FPU, otherwise mark FPU register as non-existent */
2369 if (armv7m
->fp_feature
== FP_NONE
)
2370 for (size_t idx
= ARMV7M_FPU_FIRST_REG
; idx
<= ARMV7M_FPU_LAST_REG
; idx
++)
2371 armv7m
->arm
.core_cache
->reg_list
[idx
].exist
= false;
2373 if (armv7m
->arm
.arch
!= ARM_ARCH_V8M
)
2374 for (size_t idx
= ARMV8M_FIRST_REG
; idx
<= ARMV8M_LAST_REG
; idx
++)
2375 armv7m
->arm
.core_cache
->reg_list
[idx
].exist
= false;
2377 if (!armv7m
->is_hla_target
) {
2378 if (cortex_m
->core_info
->flags
& CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K
)
2379 /* Cortex-M3/M4 have 4096 bytes autoincrement range,
2380 * s. ARM IHI 0031C: MEM-AP 7.2.2 */
2381 armv7m
->debug_ap
->tar_autoincr_block
= (1 << 12);
2384 retval
= target_read_u32(target
, DCB_DHCSR
, &cortex_m
->dcb_dhcsr
);
2385 if (retval
!= ERROR_OK
)
2387 cortex_m_cumulate_dhcsr_sticky(cortex_m
, cortex_m
->dcb_dhcsr
);
2389 if (!(cortex_m
->dcb_dhcsr
& C_DEBUGEN
)) {
2390 /* Enable debug requests */
2391 uint32_t dhcsr
= (cortex_m
->dcb_dhcsr
| C_DEBUGEN
) & ~(C_HALT
| C_STEP
| C_MASKINTS
);
2393 retval
= target_write_u32(target
, DCB_DHCSR
, DBGKEY
| (dhcsr
& 0x0000FFFFUL
));
2394 if (retval
!= ERROR_OK
)
2396 cortex_m
->dcb_dhcsr
= dhcsr
;
2399 /* Configure trace modules */
2400 retval
= target_write_u32(target
, DCB_DEMCR
, TRCENA
| armv7m
->demcr
);
2401 if (retval
!= ERROR_OK
)
2404 if (armv7m
->trace_config
.itm_deferred_config
)
2405 armv7m_trace_itm_config(target
);
2407 /* NOTE: FPB and DWT are both optional. */
2410 target_read_u32(target
, FP_CTRL
, &fpcr
);
2411 /* bits [14:12] and [7:4] */
2412 cortex_m
->fp_num_code
= ((fpcr
>> 8) & 0x70) | ((fpcr
>> 4) & 0xF);
2413 cortex_m
->fp_num_lit
= (fpcr
>> 8) & 0xF;
2414 /* Detect flash patch revision, see RM DDI 0403E.b page C1-817.
2415 Revision is zero base, fp_rev == 1 means Rev.2 ! */
2416 cortex_m
->fp_rev
= (fpcr
>> 28) & 0xf;
2417 free(cortex_m
->fp_comparator_list
);
2418 cortex_m
->fp_comparator_list
= calloc(
2419 cortex_m
->fp_num_code
+ cortex_m
->fp_num_lit
,
2420 sizeof(struct cortex_m_fp_comparator
));
2421 cortex_m
->fpb_enabled
= fpcr
& 1;
2422 for (unsigned int i
= 0; i
< cortex_m
->fp_num_code
+ cortex_m
->fp_num_lit
; i
++) {
2423 cortex_m
->fp_comparator_list
[i
].type
=
2424 (i
< cortex_m
->fp_num_code
) ? FPCR_CODE
: FPCR_LITERAL
;
2425 cortex_m
->fp_comparator_list
[i
].fpcr_address
= FP_COMP0
+ 4 * i
;
2427 /* make sure we clear any breakpoints enabled on the target */
2428 target_write_u32(target
, cortex_m
->fp_comparator_list
[i
].fpcr_address
, 0);
2430 LOG_TARGET_DEBUG(target
, "FPB fpcr 0x%" PRIx32
", numcode %i, numlit %i",
2432 cortex_m
->fp_num_code
,
2433 cortex_m
->fp_num_lit
);
2436 cortex_m_dwt_free(target
);
2437 cortex_m_dwt_setup(cortex_m
, target
);
2439 /* These hardware breakpoints only work for code in flash! */
2440 LOG_TARGET_INFO(target
, "target has %d breakpoints, %d watchpoints",
2441 cortex_m
->fp_num_code
,
2442 cortex_m
->dwt_num_comp
);
2448 static int cortex_m_dcc_read(struct target
*target
, uint8_t *value
, uint8_t *ctrl
)
2450 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
2455 retval
= mem_ap_read_buf_noincr(armv7m
->debug_ap
, buf
, 2, 1, DCB_DCRDR
);
2456 if (retval
!= ERROR_OK
)
2459 dcrdr
= target_buffer_get_u16(target
, buf
);
2460 *ctrl
= (uint8_t)dcrdr
;
2461 *value
= (uint8_t)(dcrdr
>> 8);
2463 LOG_TARGET_DEBUG(target
, "data 0x%x ctrl 0x%x", *value
, *ctrl
);
2465 /* write ack back to software dcc register
2466 * signify we have read data */
2467 if (dcrdr
& (1 << 0)) {
2468 target_buffer_set_u16(target
, buf
, 0);
2469 retval
= mem_ap_write_buf_noincr(armv7m
->debug_ap
, buf
, 2, 1, DCB_DCRDR
);
2470 if (retval
!= ERROR_OK
)
2477 static int cortex_m_target_request_data(struct target
*target
,
2478 uint32_t size
, uint8_t *buffer
)
2484 for (i
= 0; i
< (size
* 4); i
++) {
2485 int retval
= cortex_m_dcc_read(target
, &data
, &ctrl
);
2486 if (retval
!= ERROR_OK
)
2494 static int cortex_m_handle_target_request(void *priv
)
2496 struct target
*target
= priv
;
2497 if (!target_was_examined(target
))
2500 if (!target
->dbg_msg_enabled
)
2503 if (target
->state
== TARGET_RUNNING
) {
2508 retval
= cortex_m_dcc_read(target
, &data
, &ctrl
);
2509 if (retval
!= ERROR_OK
)
2512 /* check if we have data */
2513 if (ctrl
& (1 << 0)) {
2516 /* we assume target is quick enough */
2518 for (int i
= 1; i
<= 3; i
++) {
2519 retval
= cortex_m_dcc_read(target
, &data
, &ctrl
);
2520 if (retval
!= ERROR_OK
)
2522 request
|= ((uint32_t)data
<< (i
* 8));
2524 target_request(target
, request
);
2531 static int cortex_m_init_arch_info(struct target
*target
,
2532 struct cortex_m_common
*cortex_m
, struct adiv5_dap
*dap
)
2534 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
2536 armv7m_init_arch_info(target
, armv7m
);
2538 /* default reset mode is to use srst if fitted
2539 * if not it will use CORTEX_M3_RESET_VECTRESET */
2540 cortex_m
->soft_reset_config
= CORTEX_M_RESET_VECTRESET
;
2542 armv7m
->arm
.dap
= dap
;
2544 /* register arch-specific functions */
2545 armv7m
->examine_debug_reason
= cortex_m_examine_debug_reason
;
2547 armv7m
->post_debug_entry
= NULL
;
2549 armv7m
->pre_restore_context
= NULL
;
2551 armv7m
->load_core_reg_u32
= cortex_m_load_core_reg_u32
;
2552 armv7m
->store_core_reg_u32
= cortex_m_store_core_reg_u32
;
2554 target_register_timer_callback(cortex_m_handle_target_request
, 1,
2555 TARGET_TIMER_TYPE_PERIODIC
, target
);
2560 static int cortex_m_target_create(struct target
*target
, Jim_Interp
*interp
)
2562 struct adiv5_private_config
*pc
;
2564 pc
= (struct adiv5_private_config
*)target
->private_config
;
2565 if (adiv5_verify_config(pc
) != ERROR_OK
)
2568 struct cortex_m_common
*cortex_m
= calloc(1, sizeof(struct cortex_m_common
));
2570 LOG_TARGET_ERROR(target
, "No memory creating target");
2574 cortex_m
->common_magic
= CORTEX_M_COMMON_MAGIC
;
2575 cortex_m
->apsel
= pc
->ap_num
;
2577 cortex_m_init_arch_info(target
, cortex_m
, pc
->dap
);
2582 /*--------------------------------------------------------------------------*/
2584 static int cortex_m_verify_pointer(struct command_invocation
*cmd
,
2585 struct cortex_m_common
*cm
)
2587 if (!is_cortex_m_with_dap_access(cm
)) {
2588 command_print(cmd
, "target is not a Cortex-M");
2589 return ERROR_TARGET_INVALID
;
2595 * Only stuff below this line should need to verify that its target
2596 * is a Cortex-M3. Everything else should have indirected through the
2597 * cortexm3_target structure, which is only used with CM3 targets.
2600 COMMAND_HANDLER(handle_cortex_m_vector_catch_command
)
2602 struct target
*target
= get_current_target(CMD_CTX
);
2603 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
2604 struct armv7m_common
*armv7m
= &cortex_m
->armv7m
;
2608 static const struct {
2612 { "hard_err", VC_HARDERR
, },
2613 { "int_err", VC_INTERR
, },
2614 { "bus_err", VC_BUSERR
, },
2615 { "state_err", VC_STATERR
, },
2616 { "chk_err", VC_CHKERR
, },
2617 { "nocp_err", VC_NOCPERR
, },
2618 { "mm_err", VC_MMERR
, },
2619 { "reset", VC_CORERESET
, },
2622 retval
= cortex_m_verify_pointer(CMD
, cortex_m
);
2623 if (retval
!= ERROR_OK
)
2626 if (!target_was_examined(target
)) {
2627 LOG_TARGET_ERROR(target
, "Target not examined yet");
2631 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, DCB_DEMCR
, &demcr
);
2632 if (retval
!= ERROR_OK
)
2638 if (CMD_ARGC
== 1) {
2639 if (strcmp(CMD_ARGV
[0], "all") == 0) {
2640 catch = VC_HARDERR
| VC_INTERR
| VC_BUSERR
2641 | VC_STATERR
| VC_CHKERR
| VC_NOCPERR
2642 | VC_MMERR
| VC_CORERESET
;
2644 } else if (strcmp(CMD_ARGV
[0], "none") == 0)
2647 while (CMD_ARGC
-- > 0) {
2649 for (i
= 0; i
< ARRAY_SIZE(vec_ids
); i
++) {
2650 if (strcmp(CMD_ARGV
[CMD_ARGC
], vec_ids
[i
].name
) != 0)
2652 catch |= vec_ids
[i
].mask
;
2655 if (i
== ARRAY_SIZE(vec_ids
)) {
2656 LOG_TARGET_ERROR(target
, "No CM3 vector '%s'", CMD_ARGV
[CMD_ARGC
]);
2657 return ERROR_COMMAND_SYNTAX_ERROR
;
2661 /* For now, armv7m->demcr only stores vector catch flags. */
2662 armv7m
->demcr
= catch;
2667 /* write, but don't assume it stuck (why not??) */
2668 retval
= mem_ap_write_u32(armv7m
->debug_ap
, DCB_DEMCR
, demcr
);
2669 if (retval
!= ERROR_OK
)
2671 retval
= mem_ap_read_atomic_u32(armv7m
->debug_ap
, DCB_DEMCR
, &demcr
);
2672 if (retval
!= ERROR_OK
)
2675 /* FIXME be sure to clear DEMCR on clean server shutdown.
2676 * Otherwise the vector catch hardware could fire when there's
2677 * no debugger hooked up, causing much confusion...
2681 for (unsigned i
= 0; i
< ARRAY_SIZE(vec_ids
); i
++) {
2682 command_print(CMD
, "%9s: %s", vec_ids
[i
].name
,
2683 (demcr
& vec_ids
[i
].mask
) ? "catch" : "ignore");
2689 COMMAND_HANDLER(handle_cortex_m_mask_interrupts_command
)
2691 struct target
*target
= get_current_target(CMD_CTX
);
2692 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
2695 static const struct jim_nvp nvp_maskisr_modes
[] = {
2696 { .name
= "auto", .value
= CORTEX_M_ISRMASK_AUTO
},
2697 { .name
= "off", .value
= CORTEX_M_ISRMASK_OFF
},
2698 { .name
= "on", .value
= CORTEX_M_ISRMASK_ON
},
2699 { .name
= "steponly", .value
= CORTEX_M_ISRMASK_STEPONLY
},
2700 { .name
= NULL
, .value
= -1 },
2702 const struct jim_nvp
*n
;
2705 retval
= cortex_m_verify_pointer(CMD
, cortex_m
);
2706 if (retval
!= ERROR_OK
)
2709 if (target
->state
!= TARGET_HALTED
) {
2710 command_print(CMD
, "target must be stopped for \"%s\" command", CMD_NAME
);
2715 n
= jim_nvp_name2value_simple(nvp_maskisr_modes
, CMD_ARGV
[0]);
2717 return ERROR_COMMAND_SYNTAX_ERROR
;
2718 cortex_m
->isrmasking_mode
= n
->value
;
2719 cortex_m_set_maskints_for_halt(target
);
2722 n
= jim_nvp_value2name_simple(nvp_maskisr_modes
, cortex_m
->isrmasking_mode
);
2723 command_print(CMD
, "cortex_m interrupt mask %s", n
->name
);
2728 COMMAND_HANDLER(handle_cortex_m_reset_config_command
)
2730 struct target
*target
= get_current_target(CMD_CTX
);
2731 struct cortex_m_common
*cortex_m
= target_to_cm(target
);
2735 retval
= cortex_m_verify_pointer(CMD
, cortex_m
);
2736 if (retval
!= ERROR_OK
)
2740 if (strcmp(*CMD_ARGV
, "sysresetreq") == 0)
2741 cortex_m
->soft_reset_config
= CORTEX_M_RESET_SYSRESETREQ
;
2743 else if (strcmp(*CMD_ARGV
, "vectreset") == 0) {
2744 if (target_was_examined(target
)
2745 && !cortex_m
->vectreset_supported
)
2746 LOG_TARGET_WARNING(target
, "VECTRESET is not supported on your Cortex-M core!");
2748 cortex_m
->soft_reset_config
= CORTEX_M_RESET_VECTRESET
;
2751 return ERROR_COMMAND_SYNTAX_ERROR
;
2754 switch (cortex_m
->soft_reset_config
) {
2755 case CORTEX_M_RESET_SYSRESETREQ
:
2756 reset_config
= "sysresetreq";
2759 case CORTEX_M_RESET_VECTRESET
:
2760 reset_config
= "vectreset";
2764 reset_config
= "unknown";
2768 command_print(CMD
, "cortex_m reset_config %s", reset_config
);
2773 static const struct command_registration cortex_m_exec_command_handlers
[] = {
2776 .handler
= handle_cortex_m_mask_interrupts_command
,
2777 .mode
= COMMAND_EXEC
,
2778 .help
= "mask cortex_m interrupts",
2779 .usage
= "['auto'|'on'|'off'|'steponly']",
2782 .name
= "vector_catch",
2783 .handler
= handle_cortex_m_vector_catch_command
,
2784 .mode
= COMMAND_EXEC
,
2785 .help
= "configure hardware vectors to trigger debug entry",
2786 .usage
= "['all'|'none'|('bus_err'|'chk_err'|...)*]",
2789 .name
= "reset_config",
2790 .handler
= handle_cortex_m_reset_config_command
,
2791 .mode
= COMMAND_ANY
,
2792 .help
= "configure software reset handling",
2793 .usage
= "['sysresetreq'|'vectreset']",
2795 COMMAND_REGISTRATION_DONE
2797 static const struct command_registration cortex_m_command_handlers
[] = {
2799 .chain
= armv7m_command_handlers
,
2802 .chain
= armv7m_trace_command_handlers
,
2804 /* START_DEPRECATED_TPIU */
2806 .chain
= arm_tpiu_deprecated_command_handlers
,
2808 /* END_DEPRECATED_TPIU */
2811 .mode
= COMMAND_EXEC
,
2812 .help
= "Cortex-M command group",
2814 .chain
= cortex_m_exec_command_handlers
,
2817 .chain
= rtt_target_command_handlers
,
2819 COMMAND_REGISTRATION_DONE
2822 struct target_type cortexm_target
= {
2825 .poll
= cortex_m_poll
,
2826 .arch_state
= armv7m_arch_state
,
2828 .target_request_data
= cortex_m_target_request_data
,
2830 .halt
= cortex_m_halt
,
2831 .resume
= cortex_m_resume
,
2832 .step
= cortex_m_step
,
2834 .assert_reset
= cortex_m_assert_reset
,
2835 .deassert_reset
= cortex_m_deassert_reset
,
2836 .soft_reset_halt
= cortex_m_soft_reset_halt
,
2838 .get_gdb_arch
= arm_get_gdb_arch
,
2839 .get_gdb_reg_list
= armv7m_get_gdb_reg_list
,
2841 .read_memory
= cortex_m_read_memory
,
2842 .write_memory
= cortex_m_write_memory
,
2843 .checksum_memory
= armv7m_checksum_memory
,
2844 .blank_check_memory
= armv7m_blank_check_memory
,
2846 .run_algorithm
= armv7m_run_algorithm
,
2847 .start_algorithm
= armv7m_start_algorithm
,
2848 .wait_algorithm
= armv7m_wait_algorithm
,
2850 .add_breakpoint
= cortex_m_add_breakpoint
,
2851 .remove_breakpoint
= cortex_m_remove_breakpoint
,
2852 .add_watchpoint
= cortex_m_add_watchpoint
,
2853 .remove_watchpoint
= cortex_m_remove_watchpoint
,
2854 .hit_watchpoint
= cortex_m_hit_watchpoint
,
2856 .commands
= cortex_m_command_handlers
,
2857 .target_create
= cortex_m_target_create
,
2858 .target_jim_configure
= adiv5_jim_configure
,
2859 .init_target
= cortex_m_init_target
,
2860 .examine
= cortex_m_examine
,
2861 .deinit_target
= cortex_m_deinit_target
,
2863 .profiling
= cortex_m_profiling
,