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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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
,
73 * These registers are not memory-mapped. The ARMv7-M profile includes
74 * memory mapped registers too, such as for the NVIC (interrupt controller)
75 * and SysTick (timer) modules; those can mostly be treated as peripherals.
77 * The ARMv6-M profile is almost identical in this respect, except that it
78 * doesn't include basepri or faultmask registers.
88 { ARMV7M_R0
, "r0", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
89 { ARMV7M_R1
, "r1", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
90 { ARMV7M_R2
, "r2", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
91 { ARMV7M_R3
, "r3", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
92 { ARMV7M_R4
, "r4", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
93 { ARMV7M_R5
, "r5", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
94 { ARMV7M_R6
, "r6", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
95 { ARMV7M_R7
, "r7", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
96 { ARMV7M_R8
, "r8", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
97 { ARMV7M_R9
, "r9", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
98 { ARMV7M_R10
, "r10", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
99 { ARMV7M_R11
, "r11", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
100 { ARMV7M_R12
, "r12", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
101 { ARMV7M_R13
, "sp", 32, REG_TYPE_DATA_PTR
, "general", "org.gnu.gdb.arm.m-profile" },
102 { ARMV7M_R14
, "lr", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
103 { ARMV7M_PC
, "pc", 32, REG_TYPE_CODE_PTR
, "general", "org.gnu.gdb.arm.m-profile" },
104 { ARMV7M_xPSR
, "xPSR", 32, REG_TYPE_INT
, "general", "org.gnu.gdb.arm.m-profile" },
106 { ARMV7M_MSP
, "msp", 32, REG_TYPE_DATA_PTR
, "system", "org.gnu.gdb.arm.m-system" },
107 { ARMV7M_PSP
, "psp", 32, REG_TYPE_DATA_PTR
, "system", "org.gnu.gdb.arm.m-system" },
109 { ARMV7M_PRIMASK
, "primask", 1, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
110 { ARMV7M_BASEPRI
, "basepri", 8, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
111 { ARMV7M_FAULTMASK
, "faultmask", 1, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
112 { ARMV7M_CONTROL
, "control", 2, REG_TYPE_INT8
, "system", "org.gnu.gdb.arm.m-system" },
115 #define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
118 * Restores target context using the cache of core registers set up
119 * by armv7m_build_reg_cache(), calling optional core-specific hooks.
121 int armv7m_restore_context(struct target
*target
)
124 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
125 struct reg_cache
*cache
= armv7m
->arm
.core_cache
;
129 if (armv7m
->pre_restore_context
)
130 armv7m
->pre_restore_context(target
);
132 for (i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--) {
133 if (cache
->reg_list
[i
].dirty
) {
134 uint32_t value
= buf_get_u32(cache
->reg_list
[i
].value
, 0, 32);
135 armv7m
->arm
.write_core_reg(target
, &cache
->reg_list
[i
], i
, ARM_MODE_ANY
, value
);
142 /* Core state functions */
145 * Maps ISR number (from xPSR) to name.
146 * Note that while names and meanings for the first sixteen are standardized
147 * (with zero not a true exception), external interrupts are only numbered.
148 * They are assigned by vendors, which generally assign different numbers to
149 * peripherals (such as UART0 or a USB peripheral controller).
151 char *armv7m_exception_string(int number
)
153 static char enamebuf
[32];
155 if ((number
< 0) | (number
> 511))
156 return "Invalid exception";
158 return armv7m_exception_strings
[number
];
159 sprintf(enamebuf
, "External Interrupt(%i)", number
- 16);
163 static int armv7m_get_core_reg(struct reg
*reg
)
166 struct arm_reg
*armv7m_reg
= reg
->arch_info
;
167 struct target
*target
= armv7m_reg
->target
;
168 struct arm
*arm
= target_to_arm(target
);
170 if (target
->state
!= TARGET_HALTED
)
171 return ERROR_TARGET_NOT_HALTED
;
173 retval
= arm
->read_core_reg(target
, reg
, armv7m_reg
->num
, arm
->core_mode
);
178 static int armv7m_set_core_reg(struct reg
*reg
, uint8_t *buf
)
180 struct arm_reg
*armv7m_reg
= reg
->arch_info
;
181 struct target
*target
= armv7m_reg
->target
;
182 uint32_t value
= buf_get_u32(buf
, 0, 32);
184 if (target
->state
!= TARGET_HALTED
)
185 return ERROR_TARGET_NOT_HALTED
;
187 buf_set_u32(reg
->value
, 0, 32, value
);
194 static int armv7m_read_core_reg(struct target
*target
, struct reg
*r
,
195 int num
, enum arm_mode mode
)
199 struct arm_reg
*armv7m_core_reg
;
200 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
202 assert(num
< (int)armv7m
->arm
.core_cache
->num_regs
);
204 armv7m_core_reg
= armv7m
->arm
.core_cache
->reg_list
[num
].arch_info
;
205 retval
= armv7m
->load_core_reg_u32(target
,
206 armv7m_core_reg
->num
, ®_value
);
208 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[num
].value
, 0, 32, reg_value
);
209 armv7m
->arm
.core_cache
->reg_list
[num
].valid
= 1;
210 armv7m
->arm
.core_cache
->reg_list
[num
].dirty
= 0;
215 static int armv7m_write_core_reg(struct target
*target
, struct reg
*r
,
216 int num
, enum arm_mode mode
, uint32_t value
)
220 struct arm_reg
*armv7m_core_reg
;
221 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
223 assert(num
< (int)armv7m
->arm
.core_cache
->num_regs
);
225 reg_value
= buf_get_u32(armv7m
->arm
.core_cache
->reg_list
[num
].value
, 0, 32);
226 armv7m_core_reg
= armv7m
->arm
.core_cache
->reg_list
[num
].arch_info
;
227 retval
= armv7m
->store_core_reg_u32(target
,
228 armv7m_core_reg
->num
,
230 if (retval
!= ERROR_OK
) {
231 LOG_ERROR("JTAG failure");
232 armv7m
->arm
.core_cache
->reg_list
[num
].dirty
= armv7m
->arm
.core_cache
->reg_list
[num
].valid
;
233 return ERROR_JTAG_DEVICE_ERROR
;
236 LOG_DEBUG("write core reg %i value 0x%" PRIx32
"", num
, reg_value
);
237 armv7m
->arm
.core_cache
->reg_list
[num
].valid
= 1;
238 armv7m
->arm
.core_cache
->reg_list
[num
].dirty
= 0;
244 * Returns generic ARM userspace registers to GDB.
246 int armv7m_get_gdb_reg_list(struct target
*target
, struct reg
**reg_list
[],
247 int *reg_list_size
, enum target_register_class reg_class
)
249 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
252 if (reg_class
== REG_CLASS_ALL
)
253 *reg_list_size
= ARMV7M_NUM_REGS
;
257 *reg_list
= malloc(sizeof(struct reg
*) * (*reg_list_size
));
258 if (*reg_list
== NULL
)
261 for (i
= 0; i
< *reg_list_size
; i
++)
262 (*reg_list
)[i
] = &armv7m
->arm
.core_cache
->reg_list
[i
];
267 /** Runs a Thumb algorithm in the target. */
268 int armv7m_run_algorithm(struct target
*target
,
269 int num_mem_params
, struct mem_param
*mem_params
,
270 int num_reg_params
, struct reg_param
*reg_params
,
271 uint32_t entry_point
, uint32_t exit_point
,
272 int timeout_ms
, void *arch_info
)
276 retval
= armv7m_start_algorithm(target
,
277 num_mem_params
, mem_params
,
278 num_reg_params
, reg_params
,
279 entry_point
, exit_point
,
282 if (retval
== ERROR_OK
)
283 retval
= armv7m_wait_algorithm(target
,
284 num_mem_params
, mem_params
,
285 num_reg_params
, reg_params
,
286 exit_point
, timeout_ms
,
292 /** Starts a Thumb algorithm in the target. */
293 int armv7m_start_algorithm(struct target
*target
,
294 int num_mem_params
, struct mem_param
*mem_params
,
295 int num_reg_params
, struct reg_param
*reg_params
,
296 uint32_t entry_point
, uint32_t exit_point
,
299 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
300 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
301 enum arm_mode core_mode
= armv7m
->arm
.core_mode
;
302 int retval
= ERROR_OK
;
304 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
305 * at the exit point */
307 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
308 LOG_ERROR("current target isn't an ARMV7M target");
309 return ERROR_TARGET_INVALID
;
312 if (target
->state
!= TARGET_HALTED
) {
313 LOG_WARNING("target not halted");
314 return ERROR_TARGET_NOT_HALTED
;
317 /* refresh core register cache
318 * Not needed if core register cache is always consistent with target process state */
319 for (unsigned i
= 0; i
< ARMV7M_NUM_REGS
; i
++) {
321 armv7m_algorithm_info
->context
[i
] = buf_get_u32(
322 armv7m
->arm
.core_cache
->reg_list
[i
].value
,
327 for (int i
= 0; i
< num_mem_params
; i
++) {
328 /* TODO: Write only out params */
329 retval
= target_write_buffer(target
, mem_params
[i
].address
,
331 mem_params
[i
].value
);
332 if (retval
!= ERROR_OK
)
336 for (int i
= 0; i
< num_reg_params
; i
++) {
338 register_get_by_name(armv7m
->arm
.core_cache
, reg_params
[i
].reg_name
, 0);
339 /* uint32_t regvalue; */
342 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
343 return ERROR_COMMAND_SYNTAX_ERROR
;
346 if (reg
->size
!= reg_params
[i
].size
) {
347 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
348 reg_params
[i
].reg_name
);
349 return ERROR_COMMAND_SYNTAX_ERROR
;
352 /* regvalue = buf_get_u32(reg_params[i].value, 0, 32); */
353 armv7m_set_core_reg(reg
, reg_params
[i
].value
);
356 if (armv7m_algorithm_info
->core_mode
!= ARM_MODE_ANY
&&
357 armv7m_algorithm_info
->core_mode
!= core_mode
) {
359 /* we cannot set ARM_MODE_HANDLER, so use ARM_MODE_THREAD instead */
360 if (armv7m_algorithm_info
->core_mode
== ARM_MODE_HANDLER
) {
361 armv7m_algorithm_info
->core_mode
= ARM_MODE_THREAD
;
362 LOG_INFO("ARM_MODE_HANDLER not currently supported, using ARM_MODE_THREAD instead");
365 LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
366 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
367 0, 1, armv7m_algorithm_info
->core_mode
);
368 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= 1;
369 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= 1;
372 /* save previous core mode */
373 armv7m_algorithm_info
->core_mode
= core_mode
;
375 retval
= target_resume(target
, 0, entry_point
, 1, 1);
380 /** Waits for an algorithm in the target. */
381 int armv7m_wait_algorithm(struct target
*target
,
382 int num_mem_params
, struct mem_param
*mem_params
,
383 int num_reg_params
, struct reg_param
*reg_params
,
384 uint32_t exit_point
, int timeout_ms
,
387 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
388 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
389 int retval
= ERROR_OK
;
392 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
393 * at the exit point */
395 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
) {
396 LOG_ERROR("current target isn't an ARMV7M target");
397 return ERROR_TARGET_INVALID
;
400 retval
= target_wait_state(target
, TARGET_HALTED
, timeout_ms
);
401 /* If the target fails to halt due to the breakpoint, force a halt */
402 if (retval
!= ERROR_OK
|| target
->state
!= TARGET_HALTED
) {
403 retval
= target_halt(target
);
404 if (retval
!= ERROR_OK
)
406 retval
= target_wait_state(target
, TARGET_HALTED
, 500);
407 if (retval
!= ERROR_OK
)
409 return ERROR_TARGET_TIMEOUT
;
412 armv7m
->load_core_reg_u32(target
, 15, &pc
);
413 if (exit_point
&& (pc
!= exit_point
)) {
414 LOG_DEBUG("failed algorithm halted at 0x%" PRIx32
", expected 0x%" PRIx32
,
417 return ERROR_TARGET_TIMEOUT
;
420 /* Read memory values to mem_params[] */
421 for (int i
= 0; i
< num_mem_params
; i
++) {
422 if (mem_params
[i
].direction
!= PARAM_OUT
) {
423 retval
= target_read_buffer(target
, mem_params
[i
].address
,
425 mem_params
[i
].value
);
426 if (retval
!= ERROR_OK
)
431 /* Copy core register values to reg_params[] */
432 for (int i
= 0; i
< num_reg_params
; i
++) {
433 if (reg_params
[i
].direction
!= PARAM_OUT
) {
434 struct reg
*reg
= register_get_by_name(armv7m
->arm
.core_cache
,
435 reg_params
[i
].reg_name
,
439 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
440 return ERROR_COMMAND_SYNTAX_ERROR
;
443 if (reg
->size
!= reg_params
[i
].size
) {
445 "BUG: register '%s' size doesn't match reg_params[i].size",
446 reg_params
[i
].reg_name
);
447 return ERROR_COMMAND_SYNTAX_ERROR
;
450 buf_set_u32(reg_params
[i
].value
, 0, 32, buf_get_u32(reg
->value
, 0, 32));
454 for (int i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--) {
456 regvalue
= buf_get_u32(armv7m
->arm
.core_cache
->reg_list
[i
].value
, 0, 32);
457 if (regvalue
!= armv7m_algorithm_info
->context
[i
]) {
458 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32
,
459 armv7m
->arm
.core_cache
->reg_list
[i
].name
,
460 armv7m_algorithm_info
->context
[i
]);
461 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[i
].value
,
462 0, 32, armv7m_algorithm_info
->context
[i
]);
463 armv7m
->arm
.core_cache
->reg_list
[i
].valid
= 1;
464 armv7m
->arm
.core_cache
->reg_list
[i
].dirty
= 1;
468 /* restore previous core mode */
469 if (armv7m_algorithm_info
->core_mode
!= armv7m
->arm
.core_mode
) {
470 LOG_DEBUG("restoring core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
471 buf_set_u32(armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
472 0, 1, armv7m_algorithm_info
->core_mode
);
473 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= 1;
474 armv7m
->arm
.core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= 1;
477 armv7m
->arm
.core_mode
= armv7m_algorithm_info
->core_mode
;
482 /** Logs summary of ARMv7-M state for a halted target. */
483 int armv7m_arch_state(struct target
*target
)
485 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
486 struct arm
*arm
= &armv7m
->arm
;
489 ctrl
= buf_get_u32(arm
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
, 0, 32);
490 sp
= buf_get_u32(arm
->core_cache
->reg_list
[ARMV7M_R13
].value
, 0, 32);
492 LOG_USER("target halted due to %s, current mode: %s %s\n"
493 "xPSR: %#8.8" PRIx32
" pc: %#8.8" PRIx32
" %csp: %#8.8" PRIx32
"%s",
494 debug_reason_name(target
),
495 arm_mode_name(arm
->core_mode
),
496 armv7m_exception_string(armv7m
->exception_number
),
497 buf_get_u32(arm
->cpsr
->value
, 0, 32),
498 buf_get_u32(arm
->pc
->value
, 0, 32),
499 (ctrl
& 0x02) ? 'p' : 'm',
501 arm
->is_semihosting
? ", semihosting" : "");
506 static const struct reg_arch_type armv7m_reg_type
= {
507 .get
= armv7m_get_core_reg
,
508 .set
= armv7m_set_core_reg
,
511 /** Builds cache of architecturally defined registers. */
512 struct reg_cache
*armv7m_build_reg_cache(struct target
*target
)
514 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
515 struct arm
*arm
= &armv7m
->arm
;
516 int num_regs
= ARMV7M_NUM_REGS
;
517 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
518 struct reg_cache
*cache
= malloc(sizeof(struct reg_cache
));
519 struct reg
*reg_list
= calloc(num_regs
, sizeof(struct reg
));
520 struct arm_reg
*arch_info
= calloc(num_regs
, sizeof(struct arm_reg
));
521 struct reg_feature
*feature
;
524 /* Build the process context cache */
525 cache
->name
= "arm v7m registers";
527 cache
->reg_list
= reg_list
;
528 cache
->num_regs
= num_regs
;
531 for (i
= 0; i
< num_regs
; i
++) {
532 arch_info
[i
].num
= armv7m_regs
[i
].id
;
533 arch_info
[i
].target
= target
;
534 arch_info
[i
].arm
= arm
;
536 reg_list
[i
].name
= armv7m_regs
[i
].name
;
537 reg_list
[i
].size
= armv7m_regs
[i
].bits
;
538 reg_list
[i
].value
= calloc(1, 4);
539 reg_list
[i
].dirty
= 0;
540 reg_list
[i
].valid
= 0;
541 reg_list
[i
].type
= &armv7m_reg_type
;
542 reg_list
[i
].arch_info
= &arch_info
[i
];
544 reg_list
[i
].group
= armv7m_regs
[i
].group
;
545 reg_list
[i
].number
= i
;
546 reg_list
[i
].exist
= true;
547 reg_list
[i
].caller_save
= true; /* gdb defaults to true */
549 feature
= calloc(1, sizeof(struct reg_feature
));
551 feature
->name
= armv7m_regs
[i
].feature
;
552 reg_list
[i
].feature
= feature
;
554 LOG_ERROR("unable to allocate feature list");
556 reg_list
[i
].reg_data_type
= calloc(1, sizeof(struct reg_data_type
));
557 if (reg_list
[i
].reg_data_type
)
558 reg_list
[i
].reg_data_type
->type
= armv7m_regs
[i
].type
;
560 LOG_ERROR("unable to allocate reg type list");
563 arm
->cpsr
= reg_list
+ ARMV7M_xPSR
;
564 arm
->pc
= reg_list
+ ARMV7M_PC
;
565 arm
->core_cache
= cache
;
570 static int armv7m_setup_semihosting(struct target
*target
, int enable
)
572 /* nothing todo for armv7m */
576 /** Sets up target as a generic ARMv7-M core */
577 int armv7m_init_arch_info(struct target
*target
, struct armv7m_common
*armv7m
)
579 struct arm
*arm
= &armv7m
->arm
;
581 armv7m
->common_magic
= ARMV7M_COMMON_MAGIC
;
582 armv7m
->fp_feature
= FP_NONE
;
584 arm
->core_type
= ARM_MODE_THREAD
;
585 arm
->arch_info
= armv7m
;
586 arm
->setup_semihosting
= armv7m_setup_semihosting
;
588 arm
->read_core_reg
= armv7m_read_core_reg
;
589 arm
->write_core_reg
= armv7m_write_core_reg
;
591 return arm_init_arch_info(target
, arm
);
594 /** Generates a CRC32 checksum of a memory region. */
595 int armv7m_checksum_memory(struct target
*target
,
596 uint32_t address
, uint32_t count
, uint32_t *checksum
)
598 struct working_area
*crc_algorithm
;
599 struct armv7m_algorithm armv7m_info
;
600 struct reg_param reg_params
[2];
603 /* see contrib/loaders/checksum/armv7m_crc.s for src */
605 static const uint8_t cortex_m_crc_code
[] = {
607 0x02, 0x46, /* mov r2, r0 */
608 0x00, 0x20, /* movs r0, #0 */
609 0xC0, 0x43, /* mvns r0, r0 */
610 0x0A, 0x4E, /* ldr r6, CRC32XOR */
611 0x0B, 0x46, /* mov r3, r1 */
612 0x00, 0x24, /* movs r4, #0 */
613 0x0D, 0xE0, /* b ncomp */
615 0x11, 0x5D, /* ldrb r1, [r2, r4] */
616 0x09, 0x06, /* lsls r1, r1, #24 */
617 0x48, 0x40, /* eors r0, r0, r1 */
618 0x00, 0x25, /* movs r5, #0 */
620 0x00, 0x28, /* cmp r0, #0 */
621 0x02, 0xDA, /* bge notset */
622 0x40, 0x00, /* lsls r0, r0, #1 */
623 0x70, 0x40, /* eors r0, r0, r6 */
624 0x00, 0xE0, /* b cont */
626 0x40, 0x00, /* lsls r0, r0, #1 */
628 0x01, 0x35, /* adds r5, r5, #1 */
629 0x08, 0x2D, /* cmp r5, #8 */
630 0xF6, 0xD1, /* bne loop */
631 0x01, 0x34, /* adds r4, r4, #1 */
633 0x9C, 0x42, /* cmp r4, r3 */
634 0xEF, 0xD1, /* bne nbyte */
635 0x00, 0xBE, /* bkpt #0 */
636 0xB7, 0x1D, 0xC1, 0x04 /* CRC32XOR: .word 0x04c11db7 */
639 retval
= target_alloc_working_area(target
, sizeof(cortex_m_crc_code
), &crc_algorithm
);
640 if (retval
!= ERROR_OK
)
643 retval
= target_write_buffer(target
, crc_algorithm
->address
,
644 sizeof(cortex_m_crc_code
), (uint8_t *)cortex_m_crc_code
);
645 if (retval
!= ERROR_OK
)
648 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
649 armv7m_info
.core_mode
= ARM_MODE_THREAD
;
651 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
652 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
654 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
655 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
657 int timeout
= 20000 * (1 + (count
/ (1024 * 1024)));
659 retval
= target_run_algorithm(target
, 0, NULL
, 2, reg_params
, crc_algorithm
->address
,
660 crc_algorithm
->address
+ (sizeof(cortex_m_crc_code
) - 6),
661 timeout
, &armv7m_info
);
663 if (retval
== ERROR_OK
)
664 *checksum
= buf_get_u32(reg_params
[0].value
, 0, 32);
666 LOG_ERROR("error executing cortex_m crc algorithm");
668 destroy_reg_param(®_params
[0]);
669 destroy_reg_param(®_params
[1]);
672 target_free_working_area(target
, crc_algorithm
);
677 /** Checks whether a memory region is zeroed. */
678 int armv7m_blank_check_memory(struct target
*target
,
679 uint32_t address
, uint32_t count
, uint32_t *blank
)
681 struct working_area
*erase_check_algorithm
;
682 struct reg_param reg_params
[3];
683 struct armv7m_algorithm armv7m_info
;
686 /* see contrib/loaders/erase_check/armv7m_erase_check.s for src */
688 static const uint8_t erase_check_code
[] = {
690 0x03, 0x78, /* ldrb r3, [r0] */
691 0x01, 0x30, /* adds r0, #1 */
692 0x1A, 0x40, /* ands r2, r2, r3 */
693 0x01, 0x39, /* subs r1, r1, #1 */
694 0xFA, 0xD1, /* bne loop */
695 0x00, 0xBE /* bkpt #0 */
698 /* make sure we have a working area */
699 if (target_alloc_working_area(target
, sizeof(erase_check_code
),
700 &erase_check_algorithm
) != ERROR_OK
)
701 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
703 retval
= target_write_buffer(target
, erase_check_algorithm
->address
,
704 sizeof(erase_check_code
), (uint8_t *)erase_check_code
);
705 if (retval
!= ERROR_OK
)
708 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
709 armv7m_info
.core_mode
= ARM_MODE_THREAD
;
711 init_reg_param(®_params
[0], "r0", 32, PARAM_OUT
);
712 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
714 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
715 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
717 init_reg_param(®_params
[2], "r2", 32, PARAM_IN_OUT
);
718 buf_set_u32(reg_params
[2].value
, 0, 32, 0xff);
720 retval
= target_run_algorithm(target
,
725 erase_check_algorithm
->address
,
726 erase_check_algorithm
->address
+ (sizeof(erase_check_code
) - 2),
730 if (retval
== ERROR_OK
)
731 *blank
= buf_get_u32(reg_params
[2].value
, 0, 32);
733 destroy_reg_param(®_params
[0]);
734 destroy_reg_param(®_params
[1]);
735 destroy_reg_param(®_params
[2]);
737 target_free_working_area(target
, erase_check_algorithm
);
742 int armv7m_maybe_skip_bkpt_inst(struct target
*target
, bool *inst_found
)
744 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
745 struct reg
*r
= armv7m
->arm
.pc
;
749 /* if we halted last time due to a bkpt instruction
750 * then we have to manually step over it, otherwise
751 * the core will break again */
753 if (target
->debug_reason
== DBG_REASON_BREAKPOINT
) {
755 uint32_t pc
= buf_get_u32(r
->value
, 0, 32);
758 if (target_read_u16(target
, pc
, &op
) == ERROR_OK
) {
759 if ((op
& 0xFF00) == 0xBE00) {
760 pc
= buf_get_u32(r
->value
, 0, 32) + 2;
761 buf_set_u32(r
->value
, 0, 32, pc
);
765 LOG_DEBUG("Skipping over BKPT instruction");
771 *inst_found
= result
;
776 const struct command_registration armv7m_command_handlers
[] = {
778 .chain
= arm_command_handlers
,
781 .chain
= dap_command_handlers
,
783 COMMAND_REGISTRATION_DONE
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