1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * Copyright (C) 2006 by Magnus Lundin *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the *
19 * Free Software Foundation, Inc., *
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
21 ***************************************************************************/
26 #include "replacements.h"
39 #define _DEBUG_INSTRUCTION_EXECUTION_
42 char* armv7m_mode_strings[] =
47 char* armv7m_state_strings[] =
52 char* armv7m_exception_strings[] =
54 "", "Reset", "NMI", "HardFault", "MemManage", "BusFault", "UsageFault", "RESERVED", "RESERVED", "RESERVED", "RESERVED",
55 "SVCall", "DebugMonitor", "RESERVED", "PendSV", "SysTick"
58 char* armv7m_core_reg_list[] =
60 /* Registers accessed through core debug */
61 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12",
64 /* Registers accessed through MSR instructions */
65 // "apsr", "iapsr", "ipsr", "epsr",
66 "primask", "basepri", "faultmask", "control"
69 char* armv7m_core_dbgreg_list[] =
71 /* Registers accessed through core debug */
72 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12",
75 /* Registers accessed through MSR instructions */
76 // "dbg_apsr", "iapsr", "ipsr", "epsr",
77 "primask", "basepri", "faultmask", "dbg_control"
80 u8 armv7m_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
82 reg_t armv7m_gdb_dummy_fp_reg =
84 "GDB dummy floating-point register", armv7m_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
87 armv7m_core_reg_t armv7m_core_reg_list_arch_info[] =
89 /* CORE_GP are accesible using the core debug registers */
90 {0, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
91 {1, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
92 {2, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
93 {3, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
94 {4, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
95 {5, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
96 {6, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
97 {7, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
98 {8, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
99 {9, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
100 {10, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
101 {11, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
102 {12, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
103 {13, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
104 {14, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
105 {15, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL},
107 {16, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* xPSR */
108 {17, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* MSP */
109 {18, ARMV7M_REGISTER_CORE_GP, ARMV7M_MODE_ANY, NULL, NULL}, /* PSP */
111 /* CORE_SP are accesible using MSR and MRS instructions */
112 // {0x00, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* APSR */
113 // {0x01, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* IAPSR */
114 // {0x05, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* IPSR */
115 // {0x06, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* EPSR */
117 {0x10, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* PRIMASK */
118 {0x11, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* BASEPRI */
119 {0x13, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL}, /* FAULTMASK */
120 {0x14, ARMV7M_REGISTER_CORE_SP, ARMV7M_MODE_ANY, NULL, NULL} /* CONTROL */
123 int armv7m_core_reg_arch_type = -1;
126 /* Keep different contexts for the process being debugged and debug algorithms */
127 enum armv7m_runcontext armv7m_get_context(target_t *target)
129 /* get pointers to arch-specific information */
130 armv7m_common_t *armv7m = target->arch_info;
132 if (armv7m->process_context == armv7m->core_cache) return ARMV7M_PROCESS_CONTEXT;
133 if (armv7m->debug_context == armv7m->core_cache) return ARMV7M_DEBUG_CONTEXT;
135 ERROR("Invalid runcontext");
139 int armv7m_use_context(target_t *target, enum armv7m_runcontext new_ctx)
142 /* get pointers to arch-specific information */
143 armv7m_common_t *armv7m = target->arch_info;
145 if ((target->state != TARGET_HALTED) && (target->state != TARGET_RESET))
147 WARNING("target not halted, switch context ");
148 return ERROR_TARGET_NOT_HALTED;
151 if (new_ctx == armv7m_get_context(target))
156 case ARMV7M_PROCESS_CONTEXT:
157 armv7m->core_cache = armv7m->process_context;
159 case ARMV7M_DEBUG_CONTEXT:
160 armv7m->core_cache = armv7m->debug_context;
163 ERROR("Invalid runcontext");
166 /* Mark registers in new context as dirty to force reload when run */
168 for (i = 0; i < armv7m->core_cache->num_regs-1; i++) /* EXCLUDE CONTROL TODOLATER : CHECK THIS */
170 armv7m->core_cache->reg_list[i].dirty = 1;
176 /* Core state functions */
178 char *armv7m_exception_string(int number)
180 if ((number<0)|(number>511)) return "Invalid exception";
181 if (number<16) return armv7m_exception_strings[number];
182 sprintf(enamebuf,"External Interrupt(%i)",number-16);
186 int armv7m_get_core_reg(reg_t *reg)
189 armv7m_core_reg_t *armv7m_reg = reg->arch_info;
190 target_t *target = armv7m_reg->target;
191 armv7m_common_t *armv7m_target = target->arch_info;
193 if (target->state != TARGET_HALTED)
195 return ERROR_TARGET_NOT_HALTED;
198 retval = armv7m_target->read_core_reg(target, armv7m_reg->num);
203 int armv7m_set_core_reg(reg_t *reg, u8 *buf)
205 armv7m_core_reg_t *armv7m_reg = reg->arch_info;
206 target_t *target = armv7m_reg->target;
207 armv7m_common_t *armv7m_target = target->arch_info;
208 u32 value = buf_get_u32(buf, 0, 32);
210 if (target->state != TARGET_HALTED)
212 return ERROR_TARGET_NOT_HALTED;
215 buf_set_u32(reg->value, 0, 32, value);
222 int armv7m_read_core_reg(struct target_s *target, int num)
226 armv7m_core_reg_t * armv7m_core_reg;
228 /* get pointers to arch-specific information */
229 armv7m_common_t *armv7m = target->arch_info;
231 if ((num < 0) || (num >= ARMV7NUMCOREREGS))
232 return ERROR_INVALID_ARGUMENTS;
234 armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
235 retval = armv7m->load_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, ®_value);
236 buf_set_u32(armv7m->core_cache->reg_list[num].value, 0, 32, reg_value);
237 armv7m->core_cache->reg_list[num].valid=1;
238 armv7m->core_cache->reg_list[num].dirty=0;
243 int armv7m_write_core_reg(struct target_s *target, int num)
247 armv7m_core_reg_t * armv7m_core_reg;
249 /* get pointers to arch-specific information */
250 armv7m_common_t *armv7m = target->arch_info;
252 if ((num < 0) || (num >= ARMV7NUMCOREREGS))
253 return ERROR_INVALID_ARGUMENTS;
256 reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32);
257 armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
258 retval = armv7m->store_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, reg_value);
259 if (retval != ERROR_OK)
261 ERROR("JTAG failure");
262 armv7m->core_cache->reg_list[num].dirty=1;
263 return ERROR_JTAG_DEVICE_ERROR;
265 DEBUG("write core reg %i value 0x%x",num ,reg_value);
266 armv7m->core_cache->reg_list[num].valid=1;
267 armv7m->core_cache->reg_list[num].dirty=0;
275 int armv7m_invalidate_core_regs(target_t *target)
277 /* get pointers to arch-specific information */
278 armv7m_common_t *armv7m = target->arch_info;
281 for (i = 0; i < armv7m->core_cache->num_regs; i++)
283 armv7m->core_cache->reg_list[i].valid = 0;
284 armv7m->core_cache->reg_list[i].dirty = 0;
291 int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
293 /* get pointers to arch-specific information */
294 armv7m_common_t *armv7m = target->arch_info;
298 if (target->state != TARGET_HALTED)
300 return ERROR_TARGET_NOT_HALTED;
304 *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
306 /* TODOLATER correct list of registers, names ? */
307 for (i = 0; i < *reg_list_size; i++)
309 if (i<ARMV7NUMCOREREGS)
310 (*reg_list)[i] = &armv7m->process_context->reg_list[i];
311 //(*reg_list)[i] = &armv7m->core_cache->reg_list[i];
313 (*reg_list)[i] = &armv7m_gdb_dummy_fp_reg;
315 /* ARMV7M is always in thumb mode, try to make GDB understand this if it does not support this arch */
316 //armv7m->core_cache->reg_list[15].value[0] |= 1;
317 armv7m->process_context->reg_list[15].value[0] |= 1;
318 //armv7m->core_cache->reg_list[ARMV7M_xPSR].value[0] = (1<<5);
319 //armv7m->process_context->reg_list[ARMV7M_xPSR].value[0] = (1<<5);
320 (*reg_list)[25] = &armv7m->process_context->reg_list[ARMV7M_xPSR];
321 //(*reg_list)[25] = &armv7m->process_context->reg_list[ARMV7M_xPSR];
325 int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, u32 entry_point, u32 exit_point, int timeout_ms, void *arch_info)
327 // get pointers to arch-specific information
328 armv7m_common_t *armv7m = target->arch_info;
329 armv7m_algorithm_t *armv7m_algorithm_info = arch_info;
330 enum armv7m_state core_state = armv7m->core_state;
331 enum armv7m_mode core_mode = armv7m->core_mode;
332 int retval = ERROR_OK;
334 int exit_breakpoint_size = 0;
337 armv7m->core_state = core_state;
338 armv7m->core_mode = core_mode;
340 if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
342 ERROR("current target isn't an ARMV7M target");
343 return ERROR_TARGET_INVALID;
346 if (target->state != TARGET_HALTED)
348 WARNING("target not halted");
349 return ERROR_TARGET_NOT_HALTED;
352 /* refresh core register cache */
353 /* Not needed if core register cache is always consistent with target process state */
354 armv7m_use_context(target, ARMV7M_DEBUG_CONTEXT);
356 for (i = 0; i < num_mem_params; i++)
358 target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
361 for (i = 0; i < num_reg_params; i++)
363 reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
364 //reg_t *reg = register_get_by_name(armv7m->debug_context, reg_params[i].reg_name, 0);
365 //armv7m_core_reg_t * armv7m_core_reg = reg->arch_info;
370 ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
374 if (reg->size != reg_params[i].size)
376 ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
380 regvalue = buf_get_u32(reg_params[i].value, 0, 32);
381 //armv7m->store_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, regvalue);
382 armv7m_set_core_reg(reg, reg_params[i].value);
385 /* ARMV7M always runs in Tumb state */
386 exit_breakpoint_size = 2;
387 if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_SOFT)) != ERROR_OK)
389 ERROR("can't add breakpoint to finish algorithm execution");
390 return ERROR_TARGET_FAILURE;
393 /* This code relies on the target specific resume() and poll()->debug_entry()
394 sequence to write register values to the processor and the read them back */
395 target->type->resume(target, 0, entry_point, 1, 1);
396 target->type->poll(target);
398 while (target->state != TARGET_HALTED)
401 target->type->poll(target);
402 if ((timeout_ms -= 5) <= 0)
404 ERROR("timeout waiting for algorithm to complete, trying to halt target");
405 target->type->halt(target);
407 while (target->state != TARGET_HALTED)
410 target->type->poll(target);
411 if ((timeout_ms -= 10) <= 0)
413 ERROR("target didn't reenter debug state, exiting");
417 armv7m->load_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 15, &pc);
418 DEBUG("failed algoritm halted at 0x%x ",pc);
419 retval = ERROR_TARGET_TIMEOUT;
423 breakpoint_remove(target, exit_point);
425 /* Read memory values to mem_params[] */
426 for (i = 0; i < num_mem_params; i++)
428 if (mem_params[i].direction != PARAM_OUT)
429 target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
432 /* Copy core register values to reg_params[] */
433 for (i = 0; i < num_reg_params; i++)
435 if (reg_params[i].direction != PARAM_OUT)
437 //reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
438 reg_t *reg = register_get_by_name(armv7m->debug_context, reg_params[i].reg_name, 0);
443 ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
447 if (reg->size != reg_params[i].size)
449 ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
453 armv7m_core_reg_t * armv7m_core_reg = reg->arch_info;
454 //armv7m->load_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, ®value);
455 //buf_set_u32(reg_params[i].value, 0, 32, regvalue);
456 buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
460 /* Mark all core registers !! except control !! as valid but dirty */
461 /* This will be done by armv7m_use_context in resume function */
462 //for (i = 0; i < armv7m->core_cache->num_regs-1; i++)
464 // armv7m->core_cache->reg_list[i].dirty = 1;
468 // ????armv7m->core_state = core_state;
469 // ????armv7m->core_mode = core_mode;
475 int armv7m_arch_state(struct target_s *target, char *buf, int buf_size)
477 /* get pointers to arch-specific information */
478 armv7m_common_t *armv7m = target->arch_info;
480 snprintf(buf, buf_size,
481 "target halted in %s state due to %s, current mode: %s %s\nxPSR: 0x%8.8x pc: 0x%8.8x",
482 armv7m_state_strings[armv7m->core_state],
483 target_debug_reason_strings[target->debug_reason],
484 armv7m_mode_strings[armv7m->core_mode],
485 armv7m_exception_string(armv7m->exception_number),
486 buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32),
487 buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32));
492 reg_cache_t *armv7m_build_reg_cache(target_t *target)
495 /* get pointers to arch-specific information */
496 armv7m_common_t *armv7m = target->arch_info;
497 arm_jtag_t *jtag_info = &armv7m->jtag_info;
499 int num_regs = ARMV7NUMCOREREGS;
500 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
501 reg_cache_t *cache = malloc(sizeof(reg_cache_t));
502 reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
503 armv7m_core_reg_t *arch_info = malloc(sizeof(armv7m_core_reg_t) * num_regs);
506 if (armv7m_core_reg_arch_type == -1)
507 armv7m_core_reg_arch_type = register_reg_arch_type(armv7m_get_core_reg, armv7m_set_core_reg);
509 /* Build the process context cache */
510 cache->name = "arm v7m registers";
512 cache->reg_list = reg_list;
513 cache->num_regs = num_regs;
515 armv7m->core_cache = cache;
516 armv7m->process_context = cache;
518 for (i = 0; i < num_regs; i++)
520 arch_info[i] = armv7m_core_reg_list_arch_info[i];
521 arch_info[i].target = target;
522 arch_info[i].armv7m_common = armv7m;
523 reg_list[i].name = armv7m_core_reg_list[i];
524 reg_list[i].size = 32;
525 reg_list[i].value = calloc(1, 4);
526 reg_list[i].dirty = 0;
527 reg_list[i].valid = 0;
528 reg_list[i].bitfield_desc = NULL;
529 reg_list[i].num_bitfields = 0;
530 reg_list[i].arch_type = armv7m_core_reg_arch_type;
531 reg_list[i].arch_info = &arch_info[i];
534 /* Build the debug context cache*/
535 cache = malloc(sizeof(reg_cache_t));
536 reg_list = malloc(sizeof(reg_t) * num_regs);
538 cache->name = "arm v7m debug registers";
540 cache->reg_list = reg_list;
541 cache->num_regs = num_regs;
542 armv7m->debug_context = cache;
543 armv7m->process_context->next = cache;
545 for (i = 0; i < num_regs; i++)
547 reg_list[i].name = armv7m_core_dbgreg_list[i];
548 reg_list[i].size = 32;
549 reg_list[i].value = calloc(1, 4);
550 reg_list[i].dirty = 0;
551 reg_list[i].valid = 0;
552 reg_list[i].bitfield_desc = NULL;
553 reg_list[i].num_bitfields = 0;
554 reg_list[i].arch_type = armv7m_core_reg_arch_type;
555 reg_list[i].arch_info = &arch_info[i];
561 int armv7m_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
564 armv7m_build_reg_cache(target);
570 int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m)
573 /* register arch-specific functions */
575 target->arch_info = armv7m;
576 armv7m->core_state = ARMV7M_STATE_THUMB;
577 armv7m->read_core_reg = armv7m_read_core_reg;
578 armv7m->write_core_reg = armv7m_write_core_reg;
584 int armv7m_register_commands(struct command_context_s *cmd_ctx)