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 * Copyright (C) 2007,2008 Øyvind Harboe *
12 * oyvind.harboe@zylin.com *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
29 * ARMv7-M Architecture, Application Level Reference Manual *
30 * ARM DDI 0405C (September 2008) *
32 ***************************************************************************/
38 #include "breakpoints.h"
40 #include "algorithm.h"
44 #define _DEBUG_INSTRUCTION_EXECUTION_
47 static char *armv7m_exception_strings
[] = {
48 "", "Reset", "NMI", "HardFault",
49 "MemManage", "BusFault", "UsageFault", "RESERVED",
50 "RESERVED", "RESERVED", "RESERVED", "SVCall",
51 "DebugMonitor", "RESERVED", "PendSV", "SysTick"
54 /* PSP is used in some thread modes */
55 const int armv7m_psp_reg_map
[17] = {
56 ARMV7M_R0
, ARMV7M_R1
, ARMV7M_R2
, ARMV7M_R3
,
57 ARMV7M_R4
, ARMV7M_R5
, ARMV7M_R6
, ARMV7M_R7
,
58 ARMV7M_R8
, ARMV7M_R9
, ARMV7M_R10
, ARMV7M_R11
,
59 ARMV7M_R12
, ARMV7M_PSP
, ARMV7M_R14
, ARMV7M_PC
,
63 /* MSP is used in handler and some thread modes */
64 const int armv7m_msp_reg_map
[17] = {
65 ARMV7M_R0
, ARMV7M_R1
, ARMV7M_R2
, ARMV7M_R3
,
66 ARMV7M_R4
, ARMV7M_R5
, ARMV7M_R6
, ARMV7M_R7
,
67 ARMV7M_R8
, ARMV7M_R9
, ARMV7M_R10
, ARMV7M_R11
,
68 ARMV7M_R12
, ARMV7M_MSP
, ARMV7M_R14
, ARMV7M_PC
,
72 #ifdef ARMV7_GDB_HACKS
73 uint8_t armv7m_gdb_dummy_cpsr_value
[] = {0, 0, 0, 0};
75 struct reg armv7m_gdb_dummy_cpsr_reg
= {
76 .name
= "GDB dummy cpsr register",
77 .value
= armv7m_gdb_dummy_cpsr_value
,
86 * These registers are not memory-mapped. The ARMv7-M profile includes
87 * memory mapped registers too, such as for the NVIC (interrupt controller)
88 * and SysTick (timer) modules; those can mostly be treated as peripherals.
90 * The ARMv6-M profile is almost identical in this respect, except that it
91 * doesn't include basepri or faultmask registers.
98 { ARMV7M_R0
, "r0", 32 },
99 { ARMV7M_R1
, "r1", 32 },
100 { ARMV7M_R2
, "r2", 32 },
101 { ARMV7M_R3
, "r3", 32 },
103 { ARMV7M_R4
, "r4", 32 },
104 { ARMV7M_R5
, "r5", 32 },
105 { ARMV7M_R6
, "r6", 32 },
106 { ARMV7M_R7
, "r7", 32 },
108 { ARMV7M_R8
, "r8", 32 },
109 { ARMV7M_R9
, "r9", 32 },
110 { ARMV7M_R10
, "r10", 32 },
111 { ARMV7M_R11
, "r11", 32 },
113 { ARMV7M_R12
, "r12", 32 },
114 { ARMV7M_R13
, "sp", 32 },
115 { ARMV7M_R14
, "lr", 32 },
116 { ARMV7M_PC
, "pc", 32 },
118 { ARMV7M_xPSR
, "xPSR", 32 },
119 { ARMV7M_MSP
, "msp", 32 },
120 { ARMV7M_PSP
, "psp", 32 },
122 { ARMV7M_PRIMASK
, "primask", 1 },
123 { ARMV7M_BASEPRI
, "basepri", 8 },
124 { ARMV7M_FAULTMASK
, "faultmask", 1 },
125 { ARMV7M_CONTROL
, "control", 2 },
128 #define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
131 * Restores target context using the cache of core registers set up
132 * by armv7m_build_reg_cache(), calling optional core-specific hooks.
134 int armv7m_restore_context(struct target
*target
)
137 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
141 if (armv7m
->pre_restore_context
)
142 armv7m
->pre_restore_context(target
);
144 for (i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--) {
145 if (armv7m
->core_cache
->reg_list
[i
].dirty
)
146 armv7m
->write_core_reg(target
, i
);
152 /* Core state functions */
155 * Maps ISR number (from xPSR) to name.
156 * Note that while names and meanings for the first sixteen are standardized
157 * (with zero not a true exception), external interrupts are only numbered.
158 * They are assigned by vendors, which generally assign different numbers to
159 * peripherals (such as UART0 or a USB peripheral controller).
161 char *armv7m_exception_string(int number
)
163 static char enamebuf
[32];
165 if ((number
< 0) | (number
> 511))
166 return "Invalid exception";
168 return armv7m_exception_strings
[number
];
169 sprintf(enamebuf
, "External Interrupt(%i)", number
- 16);
173 static int armv7m_get_core_reg(struct reg
*reg
)
176 struct armv7m_core_reg
*armv7m_reg
= reg
->arch_info
;
177 struct target
*target
= armv7m_reg
->target
;
178 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
180 if (target
->state
!= TARGET_HALTED
)
181 return ERROR_TARGET_NOT_HALTED
;
183 retval
= armv7m
->read_core_reg(target
, armv7m_reg
->num
);
188 static int armv7m_set_core_reg(struct reg
*reg
, uint8_t *buf
)
190 struct armv7m_core_reg
*armv7m_reg
= reg
->arch_info
;
191 struct target
*target
= armv7m_reg
->target
;
192 uint32_t value
= buf_get_u32(buf
, 0, 32);
194 if (target
->state
!= TARGET_HALTED
)
195 return ERROR_TARGET_NOT_HALTED
;
197 buf_set_u32(reg
->value
, 0, 32, value
);
204 static int armv7m_read_core_reg(struct target
*target
, unsigned num
)
208 struct armv7m_core_reg
*armv7m_core_reg
;
209 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
211 if (num
>= ARMV7M_NUM_REGS
)
212 return ERROR_COMMAND_SYNTAX_ERROR
;
214 armv7m_core_reg
= armv7m
->core_cache
->reg_list
[num
].arch_info
;
215 retval
= armv7m
->load_core_reg_u32(target
,
216 armv7m_core_reg
->type
,
217 armv7m_core_reg
->num
,
219 buf_set_u32(armv7m
->core_cache
->reg_list
[num
].value
, 0, 32, reg_value
);
220 armv7m
->core_cache
->reg_list
[num
].valid
= 1;
221 armv7m
->core_cache
->reg_list
[num
].dirty
= 0;
226 static int armv7m_write_core_reg(struct target
*target
, unsigned num
)
230 struct armv7m_core_reg
*armv7m_core_reg
;
231 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
233 if (num
>= ARMV7M_NUM_REGS
)
234 return ERROR_COMMAND_SYNTAX_ERROR
;
236 reg_value
= buf_get_u32(armv7m
->core_cache
->reg_list
[num
].value
, 0, 32);
237 armv7m_core_reg
= armv7m
->core_cache
->reg_list
[num
].arch_info
;
238 retval
= armv7m
->store_core_reg_u32(target
,
239 armv7m_core_reg
->type
,
240 armv7m_core_reg
->num
,
242 if (retval
!= ERROR_OK
) {
243 LOG_ERROR("JTAG failure");
244 armv7m
->core_cache
->reg_list
[num
].dirty
= armv7m
->core_cache
->reg_list
[num
].valid
;
245 return ERROR_JTAG_DEVICE_ERROR
;
247 LOG_DEBUG("write core reg %i value 0x%" PRIx32
"", num
, reg_value
);
248 armv7m
->core_cache
->reg_list
[num
].valid
= 1;
249 armv7m
->core_cache
->reg_list
[num
].dirty
= 0;
255 * Returns generic ARM userspace registers to GDB.
256 * GDB doesn't quite understand that most ARMs don't have floating point
257 * hardware, so this also fakes a set of long-obsolete FPA registers that
258 * are not used in EABI based software stacks.
260 int armv7m_get_gdb_reg_list(struct target
*target
, struct reg
**reg_list
[], int *reg_list_size
)
262 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
266 *reg_list
= malloc(sizeof(struct reg
*) * (*reg_list_size
));
269 * GDB register packet format for ARM:
270 * - the first 16 registers are r0..r15
271 * - (obsolete) 8 FPA registers
272 * - (obsolete) FPA status
275 for (i
= 0; i
< 16; i
++)
276 (*reg_list
)[i
] = &armv7m
->core_cache
->reg_list
[i
];
278 for (i
= 16; i
< 24; i
++)
279 (*reg_list
)[i
] = &arm_gdb_dummy_fp_reg
;
280 (*reg_list
)[24] = &arm_gdb_dummy_fps_reg
;
282 #ifdef ARMV7_GDB_HACKS
283 /* use dummy cpsr reg otherwise gdb may try and set the thumb bit */
284 (*reg_list
)[25] = &armv7m_gdb_dummy_cpsr_reg
;
286 /* ARMV7M is always in thumb mode, try to make GDB understand this
287 * if it does not support this arch */
288 *((char *)armv7m
->arm
.pc
->value
) |= 1;
290 (*reg_list
)[25] = &armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
];
296 /** Runs a Thumb algorithm in the target. */
297 int armv7m_run_algorithm(struct target
*target
,
298 int num_mem_params
, struct mem_param
*mem_params
,
299 int num_reg_params
, struct reg_param
*reg_params
,
300 uint32_t entry_point
, uint32_t exit_point
,
301 int timeout_ms
, void *arch_info
)
305 retval
= armv7m_start_algorithm(target
,
306 num_mem_params
, mem_params
,
307 num_reg_params
, reg_params
,
308 entry_point
, exit_point
,
311 if (retval
== ERROR_OK
)
312 retval
= armv7m_wait_algorithm(target
,
313 num_mem_params
, mem_params
,
314 num_reg_params
, reg_params
,
315 exit_point
, timeout_ms
,
321 /** Starts a Thumb algorithm in the target. */
322 int armv7m_start_algorithm(struct target
*target
,
323 int num_mem_params
, struct mem_param
*mem_params
,
324 int num_reg_params
, struct reg_param
*reg_params
,
325 uint32_t entry_point
, uint32_t exit_point
,
328 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
329 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
330 enum arm_mode core_mode
= armv7m
->arm
.core_mode
;
331 int retval
= ERROR_OK
;
333 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
334 * at the exit point */
336 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
337 LOG_ERROR("current target isn't an ARMV7M target");
338 return ERROR_TARGET_INVALID
;
341 if (target
->state
!= TARGET_HALTED
) {
342 LOG_WARNING("target not halted");
343 return ERROR_TARGET_NOT_HALTED
;
346 /* refresh core register cache
347 * Not needed if core register cache is always consistent with target process state */
348 for (unsigned i
= 0; i
< ARMV7M_NUM_REGS
; i
++) {
349 if (!armv7m
->core_cache
->reg_list
[i
].valid
)
350 armv7m
->read_core_reg(target
, i
);
351 armv7m_algorithm_info
->context
[i
] = buf_get_u32(
352 armv7m
->core_cache
->reg_list
[i
].value
,
357 for (int i
= 0; i
< num_mem_params
; i
++) {
358 /* TODO: Write only out params */
359 retval
= target_write_buffer(target
, mem_params
[i
].address
,
361 mem_params
[i
].value
);
362 if (retval
!= ERROR_OK
)
366 for (int i
= 0; i
< num_reg_params
; i
++) {
368 register_get_by_name(armv7m
->core_cache
, reg_params
[i
].reg_name
, 0);
369 /* uint32_t regvalue; */
372 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
373 return ERROR_COMMAND_SYNTAX_ERROR
;
376 if (reg
->size
!= reg_params
[i
].size
) {
377 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
378 reg_params
[i
].reg_name
);
379 return ERROR_COMMAND_SYNTAX_ERROR
;
382 /* regvalue = buf_get_u32(reg_params[i].value, 0, 32); */
383 armv7m_set_core_reg(reg
, reg_params
[i
].value
);
386 if (armv7m_algorithm_info
->core_mode
!= ARM_MODE_ANY
) {
387 LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
388 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
389 0, 1, armv7m_algorithm_info
->core_mode
);
390 armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= 1;
391 armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= 1;
393 armv7m_algorithm_info
->core_mode
= core_mode
;
395 retval
= target_resume(target
, 0, entry_point
, 1, 1);
400 /** Waits for an algorithm in the target. */
401 int armv7m_wait_algorithm(struct target
*target
,
402 int num_mem_params
, struct mem_param
*mem_params
,
403 int num_reg_params
, struct reg_param
*reg_params
,
404 uint32_t exit_point
, int timeout_ms
,
407 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
408 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
409 int retval
= ERROR_OK
;
412 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
413 * at the exit point */
415 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
416 LOG_ERROR("current target isn't an ARMV7M target");
417 return ERROR_TARGET_INVALID
;
420 retval
= target_wait_state(target
, TARGET_HALTED
, timeout_ms
);
421 /* If the target fails to halt due to the breakpoint, force a halt */
422 if (retval
!= ERROR_OK
|| target
->state
!= TARGET_HALTED
) {
423 retval
= target_halt(target
);
424 if (retval
!= ERROR_OK
)
426 retval
= target_wait_state(target
, TARGET_HALTED
, 500);
427 if (retval
!= ERROR_OK
)
429 return ERROR_TARGET_TIMEOUT
;
432 armv7m
->load_core_reg_u32(target
, ARMV7M_REGISTER_CORE_GP
, 15, &pc
);
433 if (exit_point
&& (pc
!= exit_point
)) {
434 LOG_DEBUG("failed algorithm halted at 0x%" PRIx32
", expected 0x%" PRIx32
,
437 return ERROR_TARGET_TIMEOUT
;
440 /* Read memory values to mem_params[] */
441 for (int i
= 0; i
< num_mem_params
; i
++) {
442 if (mem_params
[i
].direction
!= PARAM_OUT
) {
443 retval
= target_read_buffer(target
, mem_params
[i
].address
,
445 mem_params
[i
].value
);
446 if (retval
!= ERROR_OK
)
451 /* Copy core register values to reg_params[] */
452 for (int i
= 0; i
< num_reg_params
; i
++) {
453 if (reg_params
[i
].direction
!= PARAM_OUT
) {
454 struct reg
*reg
= register_get_by_name(armv7m
->core_cache
,
455 reg_params
[i
].reg_name
,
459 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
460 return ERROR_COMMAND_SYNTAX_ERROR
;
463 if (reg
->size
!= reg_params
[i
].size
) {
465 "BUG: register '%s' size doesn't match reg_params[i].size",
466 reg_params
[i
].reg_name
);
467 return ERROR_COMMAND_SYNTAX_ERROR
;
470 buf_set_u32(reg_params
[i
].value
, 0, 32, buf_get_u32(reg
->value
, 0, 32));
474 for (int i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--) {
476 regvalue
= buf_get_u32(armv7m
->core_cache
->reg_list
[i
].value
, 0, 32);
477 if (regvalue
!= armv7m_algorithm_info
->context
[i
]) {
478 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32
,
479 armv7m
->core_cache
->reg_list
[i
].name
,
480 armv7m_algorithm_info
->context
[i
]);
481 buf_set_u32(armv7m
->core_cache
->reg_list
[i
].value
,
482 0, 32, armv7m_algorithm_info
->context
[i
]);
483 armv7m
->core_cache
->reg_list
[i
].valid
= 1;
484 armv7m
->core_cache
->reg_list
[i
].dirty
= 1;
488 armv7m
->arm
.core_mode
= armv7m_algorithm_info
->core_mode
;
493 /** Logs summary of ARMv7-M state for a halted target. */
494 int armv7m_arch_state(struct target
*target
)
496 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
497 struct arm
*arm
= &armv7m
->arm
;
500 ctrl
= buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
, 0, 32);
501 sp
= buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_R13
].value
, 0, 32);
503 LOG_USER("target halted due to %s, current mode: %s %s\n"
504 "xPSR: %#8.8" PRIx32
" pc: %#8.8" PRIx32
" %csp: %#8.8" PRIx32
"%s",
505 debug_reason_name(target
),
506 arm_mode_name(arm
->core_mode
),
507 armv7m_exception_string(armv7m
->exception_number
),
508 buf_get_u32(arm
->cpsr
->value
, 0, 32),
509 buf_get_u32(arm
->pc
->value
, 0, 32),
510 (ctrl
& 0x02) ? 'p' : 'm',
512 arm
->is_semihosting
? ", semihosting" : "");
517 static const struct reg_arch_type armv7m_reg_type
= {
518 .get
= armv7m_get_core_reg
,
519 .set
= armv7m_set_core_reg
,
522 /** Builds cache of architecturally defined registers. */
523 struct reg_cache
*armv7m_build_reg_cache(struct target
*target
)
525 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
526 struct arm
*arm
= &armv7m
->arm
;
527 int num_regs
= ARMV7M_NUM_REGS
;
528 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
529 struct reg_cache
*cache
= malloc(sizeof(struct reg_cache
));
530 struct reg
*reg_list
= calloc(num_regs
, sizeof(struct reg
));
531 struct armv7m_core_reg
*arch_info
= calloc(num_regs
, sizeof(struct armv7m_core_reg
));
534 #ifdef ARMV7_GDB_HACKS
535 register_init_dummy(&armv7m_gdb_dummy_cpsr_reg
);
538 /* Build the process context cache */
539 cache
->name
= "arm v7m registers";
541 cache
->reg_list
= reg_list
;
542 cache
->num_regs
= num_regs
;
544 armv7m
->core_cache
= cache
;
546 for (i
= 0; i
< num_regs
; i
++) {
547 arch_info
[i
].num
= armv7m_regs
[i
].id
;
548 arch_info
[i
].target
= target
;
549 arch_info
[i
].armv7m_common
= armv7m
;
550 reg_list
[i
].name
= armv7m_regs
[i
].name
;
551 reg_list
[i
].size
= armv7m_regs
[i
].bits
;
552 reg_list
[i
].value
= calloc(1, 4);
553 reg_list
[i
].dirty
= 0;
554 reg_list
[i
].valid
= 0;
555 reg_list
[i
].type
= &armv7m_reg_type
;
556 reg_list
[i
].arch_info
= &arch_info
[i
];
559 arm
->cpsr
= reg_list
+ ARMV7M_xPSR
;
560 arm
->pc
= reg_list
+ ARMV7M_PC
;
561 arm
->core_cache
= cache
;
565 static int armv7m_setup_semihosting(struct target
*target
, int enable
)
567 /* nothing todo for armv7m */
571 /** Sets up target as a generic ARMv7-M core */
572 int armv7m_init_arch_info(struct target
*target
, struct armv7m_common
*armv7m
)
574 struct arm
*arm
= &armv7m
->arm
;
576 armv7m
->common_magic
= ARMV7M_COMMON_MAGIC
;
577 armv7m
->fp_feature
= FP_NONE
;
579 arm
->core_type
= ARM_MODE_THREAD
;
580 arm
->arch_info
= armv7m
;
581 arm
->setup_semihosting
= armv7m_setup_semihosting
;
583 /* FIXME remove v7m-specific r/w core_reg functions;
584 * use the generic ARM core support..
586 armv7m
->read_core_reg
= armv7m_read_core_reg
;
587 armv7m
->write_core_reg
= armv7m_write_core_reg
;
589 return arm_init_arch_info(target
, arm
);
592 /** Generates a CRC32 checksum of a memory region. */
593 int armv7m_checksum_memory(struct target
*target
,
594 uint32_t address
, uint32_t count
, uint32_t *checksum
)
596 struct working_area
*crc_algorithm
;
597 struct armv7m_algorithm armv7m_info
;
598 struct reg_param reg_params
[2];
601 /* see contrib/loaders/checksum/armv7m_crc.s for src */
603 static const uint8_t cortex_m3_crc_code
[] = {
605 0x02, 0x46, /* mov r2, r0 */
606 0x00, 0x20, /* movs r0, #0 */
607 0xC0, 0x43, /* mvns r0, r0 */
608 0x0A, 0x4E, /* ldr r6, CRC32XOR */
609 0x0B, 0x46, /* mov r3, r1 */
610 0x00, 0x24, /* movs r4, #0 */
611 0x0D, 0xE0, /* b ncomp */
613 0x11, 0x5D, /* ldrb r1, [r2, r4] */
614 0x09, 0x06, /* lsls r1, r1, #24 */
615 0x48, 0x40, /* eors r0, r0, r1 */
616 0x00, 0x25, /* movs r5, #0 */
618 0x00, 0x28, /* cmp r0, #0 */
619 0x02, 0xDA, /* bge notset */
620 0x40, 0x00, /* lsls r0, r0, #1 */
621 0x70, 0x40, /* eors r0, r0, r6 */
622 0x00, 0xE0, /* b cont */
624 0x40, 0x00, /* lsls r0, r0, #1 */
626 0x01, 0x35, /* adds r5, r5, #1 */
627 0x08, 0x2D, /* cmp r5, #8 */
628 0xF6, 0xD1, /* bne loop */
629 0x01, 0x34, /* adds r4, r4, #1 */
631 0x9C, 0x42, /* cmp r4, r3 */
632 0xEF, 0xD1, /* bne nbyte */
633 0x00, 0xBE, /* bkpt #0 */
634 0xB7, 0x1D, 0xC1, 0x04 /* CRC32XOR: .word 0x04c11db7 */
637 retval
= target_alloc_working_area(target
, sizeof(cortex_m3_crc_code
), &crc_algorithm
);
638 if (retval
!= ERROR_OK
)
641 retval
= target_write_buffer(target
, crc_algorithm
->address
,
642 sizeof(cortex_m3_crc_code
), (uint8_t *)cortex_m3_crc_code
);
643 if (retval
!= ERROR_OK
)
646 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
647 armv7m_info
.core_mode
= ARM_MODE_ANY
;
649 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
650 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
652 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
653 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
655 int timeout
= 20000 * (1 + (count
/ (1024 * 1024)));
657 retval
= target_run_algorithm(target
, 0, NULL
, 2, reg_params
, crc_algorithm
->address
,
658 crc_algorithm
->address
+ (sizeof(cortex_m3_crc_code
) - 6),
659 timeout
, &armv7m_info
);
661 if (retval
== ERROR_OK
)
662 *checksum
= buf_get_u32(reg_params
[0].value
, 0, 32);
664 LOG_ERROR("error executing cortex_m3 crc algorithm");
666 destroy_reg_param(®_params
[0]);
667 destroy_reg_param(®_params
[1]);
670 target_free_working_area(target
, crc_algorithm
);
675 /** Checks whether a memory region is zeroed. */
676 int armv7m_blank_check_memory(struct target
*target
,
677 uint32_t address
, uint32_t count
, uint32_t *blank
)
679 struct working_area
*erase_check_algorithm
;
680 struct reg_param reg_params
[3];
681 struct armv7m_algorithm armv7m_info
;
684 /* see contrib/loaders/erase_check/armv7m_erase_check.s for src */
686 static const uint8_t erase_check_code
[] = {
688 0x03, 0x78, /* ldrb r3, [r0] */
689 0x01, 0x30, /* adds r0, #1 */
690 0x1A, 0x40, /* ands r2, r2, r3 */
691 0x01, 0x39, /* subs r1, r1, #1 */
692 0xFA, 0xD1, /* bne loop */
693 0x00, 0xBE /* bkpt #0 */
696 /* make sure we have a working area */
697 if (target_alloc_working_area(target
, sizeof(erase_check_code
),
698 &erase_check_algorithm
) != ERROR_OK
)
699 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
701 retval
= target_write_buffer(target
, erase_check_algorithm
->address
,
702 sizeof(erase_check_code
), (uint8_t *)erase_check_code
);
703 if (retval
!= ERROR_OK
)
706 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
707 armv7m_info
.core_mode
= ARM_MODE_ANY
;
709 init_reg_param(®_params
[0], "r0", 32, PARAM_OUT
);
710 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
712 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
713 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
715 init_reg_param(®_params
[2], "r2", 32, PARAM_IN_OUT
);
716 buf_set_u32(reg_params
[2].value
, 0, 32, 0xff);
718 retval
= target_run_algorithm(target
,
723 erase_check_algorithm
->address
,
724 erase_check_algorithm
->address
+ (sizeof(erase_check_code
) - 2),
728 if (retval
== ERROR_OK
)
729 *blank
= buf_get_u32(reg_params
[2].value
, 0, 32);
731 destroy_reg_param(®_params
[0]);
732 destroy_reg_param(®_params
[1]);
733 destroy_reg_param(®_params
[2]);
735 target_free_working_area(target
, erase_check_algorithm
);
740 int armv7m_maybe_skip_bkpt_inst(struct target
*target
, bool *inst_found
)
742 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
743 struct reg
*r
= armv7m
->arm
.pc
;
747 /* if we halted last time due to a bkpt instruction
748 * then we have to manually step over it, otherwise
749 * the core will break again */
751 if (target
->debug_reason
== DBG_REASON_BREAKPOINT
) {
753 uint32_t pc
= buf_get_u32(r
->value
, 0, 32);
756 if (target_read_u16(target
, pc
, &op
) == ERROR_OK
) {
757 if ((op
& 0xFF00) == 0xBE00) {
758 pc
= buf_get_u32(r
->value
, 0, 32) + 2;
759 buf_set_u32(r
->value
, 0, 32, pc
);
763 LOG_DEBUG("Skipping over BKPT instruction");
769 *inst_found
= result
;
774 const struct command_registration armv7m_command_handlers
[] = {
776 .chain
= arm_command_handlers
,
779 .chain
= dap_command_handlers
,
781 COMMAND_REGISTRATION_DONE
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