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 * Copyright (C) 2018 by Liviu Ionescu *
17 * This program is free software; you can redistribute it and/or modify *
18 * it under the terms of the GNU General Public License as published by *
19 * the Free Software Foundation; either version 2 of the License, or *
20 * (at your option) any later version. *
22 * This program is distributed in the hope that it will be useful, *
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
25 * GNU General Public License for more details. *
27 * You should have received a copy of the GNU General Public License *
28 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
30 * ARMv7-M Architecture, Application Level Reference Manual *
31 * ARM DDI 0405C (September 2008) *
33 ***************************************************************************/
39 #include "breakpoints.h"
41 #include "algorithm.h"
43 #include "semihosting_common.h"
46 #define _DEBUG_INSTRUCTION_EXECUTION_
49 static const char * const armv7m_exception_strings[] = {
50 "", "Reset", "NMI", "HardFault",
51 "MemManage", "BusFault", "UsageFault", "SecureFault",
52 "RESERVED", "RESERVED", "RESERVED", "SVCall",
53 "DebugMonitor", "RESERVED", "PendSV", "SysTick"
56 /* PSP is used in some thread modes */
57 const int armv7m_psp_reg_map[ARMV7M_NUM_CORE_REGS] = {
58 ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3,
59 ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7,
60 ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11,
61 ARMV7M_R12, ARMV7M_PSP, ARMV7M_R14, ARMV7M_PC,
65 /* MSP is used in handler and some thread modes */
66 const int armv7m_msp_reg_map[ARMV7M_NUM_CORE_REGS] = {
67 ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3,
68 ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7,
69 ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11,
70 ARMV7M_R12, ARMV7M_MSP, ARMV7M_R14, ARMV7M_PC,
75 * These registers are not memory-mapped. The ARMv7-M profile includes
76 * memory mapped registers too, such as for the NVIC (interrupt controller)
77 * and SysTick (timer) modules; those can mostly be treated as peripherals.
79 * The ARMv6-M profile is almost identical in this respect, except that it
80 * doesn't include basepri or faultmask registers.
90 { ARMV7M_R0, "r0", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
91 { ARMV7M_R1, "r1", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
92 { ARMV7M_R2, "r2", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
93 { ARMV7M_R3, "r3", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
94 { ARMV7M_R4, "r4", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
95 { ARMV7M_R5, "r5", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
96 { ARMV7M_R6, "r6", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
97 { ARMV7M_R7, "r7", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
98 { ARMV7M_R8, "r8", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
99 { ARMV7M_R9, "r9", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
100 { ARMV7M_R10, "r10", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
101 { ARMV7M_R11, "r11", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
102 { ARMV7M_R12, "r12", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
103 { ARMV7M_R13, "sp", 32, REG_TYPE_DATA_PTR, "general", "org.gnu.gdb.arm.m-profile" },
104 { ARMV7M_R14, "lr", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
105 { ARMV7M_PC, "pc", 32, REG_TYPE_CODE_PTR, "general", "org.gnu.gdb.arm.m-profile" },
106 { ARMV7M_xPSR, "xPSR", 32, REG_TYPE_INT, "general", "org.gnu.gdb.arm.m-profile" },
108 { ARMV7M_MSP, "msp", 32, REG_TYPE_DATA_PTR, "system", "org.gnu.gdb.arm.m-system" },
109 { ARMV7M_PSP, "psp", 32, REG_TYPE_DATA_PTR, "system", "org.gnu.gdb.arm.m-system" },
111 { ARMV7M_PRIMASK, "primask", 1, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system" },
112 { ARMV7M_BASEPRI, "basepri", 8, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system" },
113 { ARMV7M_FAULTMASK, "faultmask", 1, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system" },
114 { ARMV7M_CONTROL, "control", 3, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system" },
116 { ARMV7M_D0, "d0", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
117 { ARMV7M_D1, "d1", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
118 { ARMV7M_D2, "d2", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
119 { ARMV7M_D3, "d3", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
120 { ARMV7M_D4, "d4", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
121 { ARMV7M_D5, "d5", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
122 { ARMV7M_D6, "d6", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
123 { ARMV7M_D7, "d7", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
124 { ARMV7M_D8, "d8", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
125 { ARMV7M_D9, "d9", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
126 { ARMV7M_D10, "d10", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
127 { ARMV7M_D11, "d11", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
128 { ARMV7M_D12, "d12", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
129 { ARMV7M_D13, "d13", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
130 { ARMV7M_D14, "d14", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
131 { ARMV7M_D15, "d15", 64, REG_TYPE_IEEE_DOUBLE, "float", "org.gnu.gdb.arm.vfp" },
133 { ARMV7M_FPSCR, "fpscr", 32, REG_TYPE_INT, "float", "org.gnu.gdb.arm.vfp" },
136 #define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
139 * Restores target context using the cache of core registers set up
140 * by armv7m_build_reg_cache(), calling optional core-specific hooks.
142 int armv7m_restore_context(struct target *target)
145 struct armv7m_common *armv7m = target_to_armv7m(target);
146 struct reg_cache *cache = armv7m->arm.core_cache;
150 if (armv7m->pre_restore_context)
151 armv7m->pre_restore_context(target);
153 for (i = cache->num_regs - 1; i >= 0; i--) {
154 if (cache->reg_list[i].dirty) {
155 armv7m->arm.write_core_reg(target, &cache->reg_list[i], i,
156 ARM_MODE_ANY, cache->reg_list[i].value);
163 /* Core state functions */
166 * Maps ISR number (from xPSR) to name.
167 * Note that while names and meanings for the first sixteen are standardized
168 * (with zero not a true exception), external interrupts are only numbered.
169 * They are assigned by vendors, which generally assign different numbers to
170 * peripherals (such as UART0 or a USB peripheral controller).
172 const char *armv7m_exception_string(int number)
174 static char enamebuf[32];
176 if ((number < 0) | (number > 511))
177 return "Invalid exception";
179 return armv7m_exception_strings[number];
180 sprintf(enamebuf, "External Interrupt(%i)", number - 16);
184 static int armv7m_get_core_reg(struct reg *reg)
187 struct arm_reg *armv7m_reg = reg->arch_info;
188 struct target *target = armv7m_reg->target;
189 struct arm *arm = target_to_arm(target);
191 if (target->state != TARGET_HALTED)
192 return ERROR_TARGET_NOT_HALTED;
194 retval = arm->read_core_reg(target, reg, reg->number, arm->core_mode);
199 static int armv7m_set_core_reg(struct reg *reg, uint8_t *buf)
201 struct arm_reg *armv7m_reg = reg->arch_info;
202 struct target *target = armv7m_reg->target;
204 if (target->state != TARGET_HALTED)
205 return ERROR_TARGET_NOT_HALTED;
207 buf_cpy(buf, reg->value, reg->size);
214 static uint32_t armv7m_map_id_to_regsel(unsigned int arm_reg_id)
216 switch (arm_reg_id) {
217 case ARMV7M_R0 ... ARMV7M_R14:
222 /* NOTE: we "know" here that the register identifiers
223 * match the Cortex-M DCRSR.REGSEL selectors values
224 * for R0..R14, PC, xPSR, MSP, and PSP.
229 return ARMV7M_REGSEL_FPSCR;
231 case ARMV7M_D0 ... ARMV7M_D15:
232 return ARMV7M_REGSEL_S0 + 2 * (arm_reg_id - ARMV7M_D0);
234 /* TODO: remove. This is temporary hack until packing/unpacking
235 * of special regs is moved to armv7m.c */
238 case ARMV7M_FAULTMASK:
243 LOG_ERROR("Bad register ID %u", arm_reg_id);
248 static int armv7m_read_core_reg(struct target *target, struct reg *r,
249 int num, enum arm_mode mode)
253 struct arm_reg *armv7m_core_reg;
254 struct armv7m_common *armv7m = target_to_armv7m(target);
256 assert(num < (int)armv7m->arm.core_cache->num_regs);
257 assert(num == (int)r->number);
259 armv7m_core_reg = armv7m->arm.core_cache->reg_list[num].arch_info;
261 uint32_t regsel = armv7m_map_id_to_regsel(armv7m_core_reg->num);
263 if ((armv7m_core_reg->num >= ARMV7M_D0) && (armv7m_core_reg->num <= ARMV7M_D15)) {
264 /* map D0..D15 to S0..S31 */
265 retval = armv7m->load_core_reg_u32(target, regsel, ®_value);
266 if (retval != ERROR_OK)
268 buf_set_u32(armv7m->arm.core_cache->reg_list[num].value,
270 retval = armv7m->load_core_reg_u32(target, regsel + 1, ®_value);
271 if (retval != ERROR_OK)
273 buf_set_u32(armv7m->arm.core_cache->reg_list[num].value + 4,
276 retval = armv7m->load_core_reg_u32(target,
278 if (retval != ERROR_OK)
280 buf_set_u32(armv7m->arm.core_cache->reg_list[num].value, 0, 32, reg_value);
283 armv7m->arm.core_cache->reg_list[num].valid = true;
284 armv7m->arm.core_cache->reg_list[num].dirty = false;
289 static int armv7m_write_core_reg(struct target *target, struct reg *r,
290 int num, enum arm_mode mode, uint8_t *value)
293 struct arm_reg *armv7m_core_reg;
294 struct armv7m_common *armv7m = target_to_armv7m(target);
296 assert(num < (int)armv7m->arm.core_cache->num_regs);
297 assert(num == (int)r->number);
299 armv7m_core_reg = armv7m->arm.core_cache->reg_list[num].arch_info;
301 uint32_t regsel = armv7m_map_id_to_regsel(armv7m_core_reg->num);
303 if ((armv7m_core_reg->num >= ARMV7M_D0) && (armv7m_core_reg->num <= ARMV7M_D15)) {
304 /* map D0..D15 to S0..S31 */
305 uint32_t t = buf_get_u32(value, 0, 32);
306 retval = armv7m->store_core_reg_u32(target, regsel, t);
307 if (retval != ERROR_OK)
310 t = buf_get_u32(value + 4, 0, 32);
311 retval = armv7m->store_core_reg_u32(target, regsel + 1, t);
312 if (retval != ERROR_OK)
315 uint32_t t = buf_get_u32(value, 0, 32);
317 LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", num, t);
318 retval = armv7m->store_core_reg_u32(target, regsel, t);
319 if (retval != ERROR_OK)
323 armv7m->arm.core_cache->reg_list[num].valid = true;
324 armv7m->arm.core_cache->reg_list[num].dirty = false;
329 LOG_ERROR("Error setting register");
330 armv7m->arm.core_cache->reg_list[num].dirty = armv7m->arm.core_cache->reg_list[num].valid;
331 return ERROR_JTAG_DEVICE_ERROR;
335 * Returns generic ARM userspace registers to GDB.
337 int armv7m_get_gdb_reg_list(struct target *target, struct reg **reg_list[],
338 int *reg_list_size, enum target_register_class reg_class)
340 struct armv7m_common *armv7m = target_to_armv7m(target);
343 if (reg_class == REG_CLASS_ALL)
344 size = armv7m->arm.core_cache->num_regs;
346 size = ARMV7M_NUM_CORE_REGS;
348 *reg_list = malloc(sizeof(struct reg *) * size);
349 if (*reg_list == NULL)
352 for (i = 0; i < size; i++)
353 (*reg_list)[i] = &armv7m->arm.core_cache->reg_list[i];
355 *reg_list_size = size;
360 /** Runs a Thumb algorithm in the target. */
361 int armv7m_run_algorithm(struct target *target,
362 int num_mem_params, struct mem_param *mem_params,
363 int num_reg_params, struct reg_param *reg_params,
364 target_addr_t entry_point, target_addr_t exit_point,
365 int timeout_ms, void *arch_info)
369 retval = armv7m_start_algorithm(target,
370 num_mem_params, mem_params,
371 num_reg_params, reg_params,
372 entry_point, exit_point,
375 if (retval == ERROR_OK)
376 retval = armv7m_wait_algorithm(target,
377 num_mem_params, mem_params,
378 num_reg_params, reg_params,
379 exit_point, timeout_ms,
385 /** Starts a Thumb algorithm in the target. */
386 int armv7m_start_algorithm(struct target *target,
387 int num_mem_params, struct mem_param *mem_params,
388 int num_reg_params, struct reg_param *reg_params,
389 target_addr_t entry_point, target_addr_t exit_point,
392 struct armv7m_common *armv7m = target_to_armv7m(target);
393 struct armv7m_algorithm *armv7m_algorithm_info = arch_info;
394 enum arm_mode core_mode = armv7m->arm.core_mode;
395 int retval = ERROR_OK;
397 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
398 * at the exit point */
400 if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC) {
401 LOG_ERROR("current target isn't an ARMV7M target");
402 return ERROR_TARGET_INVALID;
405 if (target->state != TARGET_HALTED) {
406 LOG_WARNING("target not halted");
407 return ERROR_TARGET_NOT_HALTED;
410 /* refresh core register cache
411 * Not needed if core register cache is always consistent with target process state */
412 for (unsigned i = 0; i < armv7m->arm.core_cache->num_regs; i++) {
414 armv7m_algorithm_info->context[i] = buf_get_u32(
415 armv7m->arm.core_cache->reg_list[i].value,
420 for (int i = 0; i < num_mem_params; i++) {
421 if (mem_params[i].direction == PARAM_IN)
423 retval = target_write_buffer(target, mem_params[i].address,
425 mem_params[i].value);
426 if (retval != ERROR_OK)
430 for (int i = 0; i < num_reg_params; i++) {
431 if (reg_params[i].direction == PARAM_IN)
435 register_get_by_name(armv7m->arm.core_cache, reg_params[i].reg_name, 0);
436 /* uint32_t regvalue; */
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) {
444 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size",
445 reg_params[i].reg_name);
446 return ERROR_COMMAND_SYNTAX_ERROR;
449 /* regvalue = buf_get_u32(reg_params[i].value, 0, 32); */
450 armv7m_set_core_reg(reg, reg_params[i].value);
455 * Ensure xPSR.T is set to avoid trying to run things in arm
456 * (non-thumb) mode, which armv7m does not support.
458 * We do this by setting the entirety of xPSR, which should
459 * remove all the unknowns about xPSR state.
461 * Because xPSR.T is populated on reset from the vector table,
462 * it might be 0 if the vector table has "bad" data in it.
464 struct reg *reg = &armv7m->arm.core_cache->reg_list[ARMV7M_xPSR];
465 buf_set_u32(reg->value, 0, 32, 0x01000000);
470 if (armv7m_algorithm_info->core_mode != ARM_MODE_ANY &&
471 armv7m_algorithm_info->core_mode != core_mode) {
473 /* we cannot set ARM_MODE_HANDLER, so use ARM_MODE_THREAD instead */
474 if (armv7m_algorithm_info->core_mode == ARM_MODE_HANDLER) {
475 armv7m_algorithm_info->core_mode = ARM_MODE_THREAD;
476 LOG_INFO("ARM_MODE_HANDLER not currently supported, using ARM_MODE_THREAD instead");
479 LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info->core_mode);
480 buf_set_u32(armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].value,
481 0, 1, armv7m_algorithm_info->core_mode);
482 armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].dirty = true;
483 armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].valid = true;
486 /* save previous core mode */
487 armv7m_algorithm_info->core_mode = core_mode;
489 retval = target_resume(target, 0, entry_point, 1, 1);
494 /** Waits for an algorithm in the target. */
495 int armv7m_wait_algorithm(struct target *target,
496 int num_mem_params, struct mem_param *mem_params,
497 int num_reg_params, struct reg_param *reg_params,
498 target_addr_t exit_point, int timeout_ms,
501 struct armv7m_common *armv7m = target_to_armv7m(target);
502 struct armv7m_algorithm *armv7m_algorithm_info = arch_info;
503 int retval = ERROR_OK;
505 /* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
506 * at the exit point */
508 if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC) {
509 LOG_ERROR("current target isn't an ARMV7M target");
510 return ERROR_TARGET_INVALID;
513 retval = target_wait_state(target, TARGET_HALTED, timeout_ms);
514 /* If the target fails to halt due to the breakpoint, force a halt */
515 if (retval != ERROR_OK || target->state != TARGET_HALTED) {
516 retval = target_halt(target);
517 if (retval != ERROR_OK)
519 retval = target_wait_state(target, TARGET_HALTED, 500);
520 if (retval != ERROR_OK)
522 return ERROR_TARGET_TIMEOUT;
526 /* PC value has been cached in cortex_m_debug_entry() */
527 uint32_t pc = buf_get_u32(armv7m->arm.pc->value, 0, 32);
528 if (pc != exit_point) {
529 LOG_DEBUG("failed algorithm halted at 0x%" PRIx32 ", expected 0x%" TARGET_PRIxADDR,
531 return ERROR_TARGET_ALGO_EXIT;
535 /* Read memory values to mem_params[] */
536 for (int i = 0; i < num_mem_params; i++) {
537 if (mem_params[i].direction != PARAM_OUT) {
538 retval = target_read_buffer(target, mem_params[i].address,
540 mem_params[i].value);
541 if (retval != ERROR_OK)
546 /* Copy core register values to reg_params[] */
547 for (int i = 0; i < num_reg_params; i++) {
548 if (reg_params[i].direction != PARAM_OUT) {
549 struct reg *reg = register_get_by_name(armv7m->arm.core_cache,
550 reg_params[i].reg_name,
554 LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
555 return ERROR_COMMAND_SYNTAX_ERROR;
558 if (reg->size != reg_params[i].size) {
560 "BUG: register '%s' size doesn't match reg_params[i].size",
561 reg_params[i].reg_name);
562 return ERROR_COMMAND_SYNTAX_ERROR;
565 buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
569 for (int i = armv7m->arm.core_cache->num_regs - 1; i >= 0; i--) {
571 regvalue = buf_get_u32(armv7m->arm.core_cache->reg_list[i].value, 0, 32);
572 if (regvalue != armv7m_algorithm_info->context[i]) {
573 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32,
574 armv7m->arm.core_cache->reg_list[i].name,
575 armv7m_algorithm_info->context[i]);
576 buf_set_u32(armv7m->arm.core_cache->reg_list[i].value,
577 0, 32, armv7m_algorithm_info->context[i]);
578 armv7m->arm.core_cache->reg_list[i].valid = true;
579 armv7m->arm.core_cache->reg_list[i].dirty = true;
583 /* restore previous core mode */
584 if (armv7m_algorithm_info->core_mode != armv7m->arm.core_mode) {
585 LOG_DEBUG("restoring core_mode: 0x%2.2x", armv7m_algorithm_info->core_mode);
586 buf_set_u32(armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].value,
587 0, 1, armv7m_algorithm_info->core_mode);
588 armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].dirty = true;
589 armv7m->arm.core_cache->reg_list[ARMV7M_CONTROL].valid = true;
592 armv7m->arm.core_mode = armv7m_algorithm_info->core_mode;
597 /** Logs summary of ARMv7-M state for a halted target. */
598 int armv7m_arch_state(struct target *target)
600 struct armv7m_common *armv7m = target_to_armv7m(target);
601 struct arm *arm = &armv7m->arm;
604 /* avoid filling log waiting for fileio reply */
605 if (target->semihosting && target->semihosting->hit_fileio)
608 ctrl = buf_get_u32(arm->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 32);
609 sp = buf_get_u32(arm->core_cache->reg_list[ARMV7M_R13].value, 0, 32);
611 LOG_USER("target halted due to %s, current mode: %s %s\n"
612 "xPSR: %#8.8" PRIx32 " pc: %#8.8" PRIx32 " %csp: %#8.8" PRIx32 "%s%s",
613 debug_reason_name(target),
614 arm_mode_name(arm->core_mode),
615 armv7m_exception_string(armv7m->exception_number),
616 buf_get_u32(arm->cpsr->value, 0, 32),
617 buf_get_u32(arm->pc->value, 0, 32),
618 (ctrl & 0x02) ? 'p' : 'm',
620 (target->semihosting && target->semihosting->is_active) ? ", semihosting" : "",
621 (target->semihosting && target->semihosting->is_fileio) ? " fileio" : "");
626 static const struct reg_arch_type armv7m_reg_type = {
627 .get = armv7m_get_core_reg,
628 .set = armv7m_set_core_reg,
631 /** Builds cache of architecturally defined registers. */
632 struct reg_cache *armv7m_build_reg_cache(struct target *target)
634 struct armv7m_common *armv7m = target_to_armv7m(target);
635 struct arm *arm = &armv7m->arm;
636 int num_regs = ARMV7M_NUM_REGS;
637 struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
638 struct reg_cache *cache = malloc(sizeof(struct reg_cache));
639 struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
640 struct arm_reg *arch_info = calloc(num_regs, sizeof(struct arm_reg));
641 struct reg_feature *feature;
644 /* Build the process context cache */
645 cache->name = "arm v7m registers";
647 cache->reg_list = reg_list;
648 cache->num_regs = num_regs;
651 for (i = 0; i < num_regs; i++) {
652 arch_info[i].num = armv7m_regs[i].id;
653 arch_info[i].target = target;
654 arch_info[i].arm = arm;
656 reg_list[i].name = armv7m_regs[i].name;
657 reg_list[i].size = armv7m_regs[i].bits;
658 size_t storage_size = DIV_ROUND_UP(armv7m_regs[i].bits, 8);
659 if (storage_size < 4)
661 reg_list[i].value = calloc(1, storage_size);
662 reg_list[i].dirty = false;
663 reg_list[i].valid = false;
664 reg_list[i].type = &armv7m_reg_type;
665 reg_list[i].arch_info = &arch_info[i];
667 reg_list[i].group = armv7m_regs[i].group;
668 reg_list[i].number = i;
669 reg_list[i].exist = true;
670 reg_list[i].caller_save = true; /* gdb defaults to true */
672 feature = calloc(1, sizeof(struct reg_feature));
674 feature->name = armv7m_regs[i].feature;
675 reg_list[i].feature = feature;
677 LOG_ERROR("unable to allocate feature list");
679 reg_list[i].reg_data_type = calloc(1, sizeof(struct reg_data_type));
680 if (reg_list[i].reg_data_type)
681 reg_list[i].reg_data_type->type = armv7m_regs[i].type;
683 LOG_ERROR("unable to allocate reg type list");
686 arm->cpsr = reg_list + ARMV7M_xPSR;
687 arm->pc = reg_list + ARMV7M_PC;
688 arm->core_cache = cache;
693 void armv7m_free_reg_cache(struct target *target)
695 struct armv7m_common *armv7m = target_to_armv7m(target);
696 struct arm *arm = &armv7m->arm;
697 struct reg_cache *cache;
701 cache = arm->core_cache;
706 for (i = 0; i < cache->num_regs; i++) {
707 reg = &cache->reg_list[i];
710 free(reg->reg_data_type);
714 free(cache->reg_list[0].arch_info);
715 free(cache->reg_list);
718 arm->core_cache = NULL;
721 static int armv7m_setup_semihosting(struct target *target, int enable)
723 /* nothing todo for armv7m */
727 /** Sets up target as a generic ARMv7-M core */
728 int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m)
730 struct arm *arm = &armv7m->arm;
732 armv7m->common_magic = ARMV7M_COMMON_MAGIC;
733 armv7m->fp_feature = FP_NONE;
734 armv7m->trace_config.trace_bus_id = 1;
735 /* Enable stimulus port #0 by default */
736 armv7m->trace_config.itm_ter[0] = 1;
738 arm->core_type = ARM_CORE_TYPE_M_PROFILE;
739 arm->arch_info = armv7m;
740 arm->setup_semihosting = armv7m_setup_semihosting;
742 arm->read_core_reg = armv7m_read_core_reg;
743 arm->write_core_reg = armv7m_write_core_reg;
745 return arm_init_arch_info(target, arm);
748 /** Generates a CRC32 checksum of a memory region. */
749 int armv7m_checksum_memory(struct target *target,
750 target_addr_t address, uint32_t count, uint32_t *checksum)
752 struct working_area *crc_algorithm;
753 struct armv7m_algorithm armv7m_info;
754 struct reg_param reg_params[2];
757 static const uint8_t cortex_m_crc_code[] = {
758 #include "../../contrib/loaders/checksum/armv7m_crc.inc"
761 retval = target_alloc_working_area(target, sizeof(cortex_m_crc_code), &crc_algorithm);
762 if (retval != ERROR_OK)
765 retval = target_write_buffer(target, crc_algorithm->address,
766 sizeof(cortex_m_crc_code), (uint8_t *)cortex_m_crc_code);
767 if (retval != ERROR_OK)
770 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
771 armv7m_info.core_mode = ARM_MODE_THREAD;
773 init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT);
774 init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
776 buf_set_u32(reg_params[0].value, 0, 32, address);
777 buf_set_u32(reg_params[1].value, 0, 32, count);
779 int timeout = 20000 * (1 + (count / (1024 * 1024)));
781 retval = target_run_algorithm(target, 0, NULL, 2, reg_params, crc_algorithm->address,
782 crc_algorithm->address + (sizeof(cortex_m_crc_code) - 6),
783 timeout, &armv7m_info);
785 if (retval == ERROR_OK)
786 *checksum = buf_get_u32(reg_params[0].value, 0, 32);
788 LOG_ERROR("error executing cortex_m crc algorithm");
790 destroy_reg_param(®_params[0]);
791 destroy_reg_param(®_params[1]);
794 target_free_working_area(target, crc_algorithm);
799 /** Checks an array of memory regions whether they are erased. */
800 int armv7m_blank_check_memory(struct target *target,
801 struct target_memory_check_block *blocks, int num_blocks, uint8_t erased_value)
803 struct working_area *erase_check_algorithm;
804 struct working_area *erase_check_params;
805 struct reg_param reg_params[2];
806 struct armv7m_algorithm armv7m_info;
809 static bool timed_out;
811 static const uint8_t erase_check_code[] = {
812 #include "../../contrib/loaders/erase_check/armv7m_erase_check.inc"
815 const uint32_t code_size = sizeof(erase_check_code);
817 /* make sure we have a working area */
818 if (target_alloc_working_area(target, code_size,
819 &erase_check_algorithm) != ERROR_OK)
820 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
822 retval = target_write_buffer(target, erase_check_algorithm->address,
823 code_size, erase_check_code);
824 if (retval != ERROR_OK)
827 /* prepare blocks array for algo */
836 uint32_t avail = target_get_working_area_avail(target);
837 int blocks_to_check = avail / sizeof(struct algo_block) - 1;
838 if (num_blocks < blocks_to_check)
839 blocks_to_check = num_blocks;
841 struct algo_block *params = malloc((blocks_to_check+1)*sizeof(struct algo_block));
842 if (params == NULL) {
848 uint32_t total_size = 0;
849 for (i = 0; i < blocks_to_check; i++) {
850 total_size += blocks[i].size;
851 target_buffer_set_u32(target, (uint8_t *)&(params[i].size),
852 blocks[i].size / sizeof(uint32_t));
853 target_buffer_set_u32(target, (uint8_t *)&(params[i].address),
856 target_buffer_set_u32(target, (uint8_t *)&(params[blocks_to_check].size), 0);
858 uint32_t param_size = (blocks_to_check + 1) * sizeof(struct algo_block);
859 if (target_alloc_working_area(target, param_size,
860 &erase_check_params) != ERROR_OK) {
861 retval = ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
865 retval = target_write_buffer(target, erase_check_params->address,
866 param_size, (uint8_t *)params);
867 if (retval != ERROR_OK)
870 uint32_t erased_word = erased_value | (erased_value << 8)
871 | (erased_value << 16) | (erased_value << 24);
873 LOG_DEBUG("Starting erase check of %d blocks, parameters@"
874 TARGET_ADDR_FMT, blocks_to_check, erase_check_params->address);
876 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
877 armv7m_info.core_mode = ARM_MODE_THREAD;
879 init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
880 buf_set_u32(reg_params[0].value, 0, 32, erase_check_params->address);
882 init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
883 buf_set_u32(reg_params[1].value, 0, 32, erased_word);
885 /* assume CPU clk at least 1 MHz */
886 int timeout = (timed_out ? 30000 : 2000) + total_size * 3 / 1000;
888 retval = target_run_algorithm(target,
890 ARRAY_SIZE(reg_params), reg_params,
891 erase_check_algorithm->address,
892 erase_check_algorithm->address + (code_size - 2),
896 timed_out = retval == ERROR_TARGET_TIMEOUT;
897 if (retval != ERROR_OK && !timed_out)
900 retval = target_read_buffer(target, erase_check_params->address,
901 param_size, (uint8_t *)params);
902 if (retval != ERROR_OK)
905 for (i = 0; i < blocks_to_check; i++) {
906 uint32_t result = target_buffer_get_u32(target,
907 (uint8_t *)&(params[i].result));
908 if (result != 0 && result != 1)
911 blocks[i].result = result;
914 LOG_INFO("Slow CPU clock: %d blocks checked, %d remain. Continuing...", i, num_blocks-i);
916 retval = i; /* return number of blocks really checked */
919 destroy_reg_param(®_params[0]);
920 destroy_reg_param(®_params[1]);
923 target_free_working_area(target, erase_check_params);
927 target_free_working_area(target, erase_check_algorithm);
932 int armv7m_maybe_skip_bkpt_inst(struct target *target, bool *inst_found)
934 struct armv7m_common *armv7m = target_to_armv7m(target);
935 struct reg *r = armv7m->arm.pc;
939 /* if we halted last time due to a bkpt instruction
940 * then we have to manually step over it, otherwise
941 * the core will break again */
943 if (target->debug_reason == DBG_REASON_BREAKPOINT) {
945 uint32_t pc = buf_get_u32(r->value, 0, 32);
948 if (target_read_u16(target, pc, &op) == ERROR_OK) {
949 if ((op & 0xFF00) == 0xBE00) {
950 pc = buf_get_u32(r->value, 0, 32) + 2;
951 buf_set_u32(r->value, 0, 32, pc);
955 LOG_DEBUG("Skipping over BKPT instruction");
961 *inst_found = result;
966 const struct command_registration armv7m_command_handlers[] = {
968 .chain = arm_command_handlers,
970 COMMAND_REGISTRATION_DONE