src/target/armv7m.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *   Copyright (C) 2006 by Magnus Lundin                                   *
   5  *   lundin@mlu.mine.nu                                                    *
   6  *                                                                         *
   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.                                   *
  11  *                                                                         *
  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.                          *
  16  *                                                                         *
  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  ***************************************************************************/
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "replacements.h"
  27
  28 #include "armv7m.h"
  29 #include "register.h"
  30 #include "target.h"
  31 #include "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 char* armv7m_mode_strings[] =
  43 {
  44         "Handler", "Thread"
  45 };
  46
  47 char* armv7m_state_strings[] =
  48 {
  49         "Thumb", "Debug"
  50 };
  51
  52 char* armv7m_exception_strings[] =
  53 {
  54         "", "Reset", "NMI", "HardFault", "MemManage", "BusFault", "UsageFault", "RESERVED", "RESERVED", "RESERVED", "RESERVED",
  55         "SVCall", "DebugMonitor", "RESERVED", "PendSV", "SysTick"
  56 };
  57
  58 char* armv7m_core_reg_list[] =
  59 {
  60         /* Registers accessed through core debug */
  61         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12",
  62         "sp", "lr", "pc",
  63         "xPSR", "msp", "psp",
  64         /* Registers accessed through MSR instructions */
  65 //      "apsr", "iapsr", "ipsr", "epsr",
  66         "primask", "basepri", "faultmask", "control"
  67 };
  68
  69 char* armv7m_core_dbgreg_list[] =
  70 {
  71         /* Registers accessed through core debug */
  72         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12",
  73         "sp", "lr", "pc",
  74         "xPSR", "msp", "psp",
  75         /* Registers accessed through MSR instructions */
  76 //      "dbg_apsr", "iapsr", "ipsr", "epsr",
  77         "primask", "basepri", "faultmask", "dbg_control"
  78 };
  79
  80 u8 armv7m_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  81
  82 reg_t armv7m_gdb_dummy_fp_reg =
  83 {
  84         "GDB dummy floating-point register", armv7m_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
  85 };
  86
  87 armv7m_core_reg_t armv7m_core_reg_list_arch_info[] =
  88 {
  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},
 106
 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 */
 110
 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 */
 116
 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 */
 121 };
 122
 123 int armv7m_core_reg_arch_type = -1;
 124
 125 /* Keep different contexts for the process being debugged and debug algorithms */
 126 enum armv7m_runcontext armv7m_get_context(target_t *target)
 127 {
 128         /* get pointers to arch-specific information */
 129         armv7m_common_t *armv7m = target->arch_info;
 130
 131         if (armv7m->process_context == armv7m->core_cache)
 132                 return ARMV7M_PROCESS_CONTEXT;
 133         if (armv7m->debug_context == armv7m->core_cache)
 134                 return ARMV7M_DEBUG_CONTEXT;
 135
 136         ERROR("Invalid runcontext");
 137         exit(-1);
 138 }
 139
 140 int armv7m_use_context(target_t *target, enum armv7m_runcontext new_ctx)
 141 {
 142         int i;
 143         /* get pointers to arch-specific information */
 144         armv7m_common_t *armv7m = target->arch_info;
 145
 146         if ((target->state != TARGET_HALTED) && (target->state != TARGET_RESET))
 147         {
 148                 WARNING("target not halted, switch context ");
 149                 return ERROR_TARGET_NOT_HALTED;
 150         }
 151
 152         if (new_ctx == armv7m_get_context(target))
 153                 return ERROR_OK;
 154
 155         switch (new_ctx)
 156         {
 157                 case ARMV7M_PROCESS_CONTEXT:
 158                          armv7m->core_cache = armv7m->process_context;
 159                          break;
 160                 case ARMV7M_DEBUG_CONTEXT:
 161                          armv7m->core_cache = armv7m->debug_context;
 162                          break;
 163                 default:
 164                         ERROR("Invalid runcontext");
 165                         exit(-1);
 166         }
 167         /* Mark registers in new context as dirty to force reload when run */
 168
 169         for (i = 0; i < armv7m->core_cache->num_regs-1; i++) /* EXCLUDE CONTROL TODOLATER : CHECK THIS */
 170         {
 171                 armv7m->core_cache->reg_list[i].dirty = 1;
 172         }
 173
 174         return ERROR_OK;
 175 }
 176
 177 /* Core state functions */
 178 char enamebuf[32];
 179 char *armv7m_exception_string(int number)
 180 {
 181         if ((number < 0) | (number > 511))
 182                 return "Invalid exception";
 183         if (number < 16)
 184                 return armv7m_exception_strings[number];
 185         sprintf(enamebuf, "External Interrupt(%i)", number - 16);
 186         return enamebuf;
 187 }
 188
 189 int armv7m_get_core_reg(reg_t *reg)
 190 {
 191         int retval;
 192         armv7m_core_reg_t *armv7m_reg = reg->arch_info;
 193         target_t *target = armv7m_reg->target;
 194         armv7m_common_t *armv7m_target = target->arch_info;
 195
 196         if (target->state != TARGET_HALTED)
 197         {
 198                 return ERROR_TARGET_NOT_HALTED;
 199         }
 200
 201         retval = armv7m_target->read_core_reg(target, armv7m_reg->num);
 202
 203         return retval;
 204 }
 205
 206 int armv7m_set_core_reg(reg_t *reg, u8 *buf)
 207 {
 208         armv7m_core_reg_t *armv7m_reg = reg->arch_info;
 209         target_t *target = armv7m_reg->target;
 210         armv7m_common_t *armv7m_target = target->arch_info;
 211         u32 value = buf_get_u32(buf, 0, 32);
 212
 213         if (target->state != TARGET_HALTED)
 214         {
 215                 return ERROR_TARGET_NOT_HALTED;
 216         }
 217
 218         buf_set_u32(reg->value, 0, 32, value);
 219         reg->dirty = 1;
 220         reg->valid = 1;
 221
 222         return ERROR_OK;
 223 }
 224
 225 int armv7m_read_core_reg(struct target_s *target, int num)
 226 {
 227         u32 reg_value;
 228         int retval;
 229         armv7m_core_reg_t * armv7m_core_reg;
 230
 231         /* get pointers to arch-specific information */
 232         armv7m_common_t *armv7m = target->arch_info;
 233
 234         if ((num < 0) || (num >= ARMV7NUMCOREREGS))
 235                 return ERROR_INVALID_ARGUMENTS;
 236
 237         armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
 238         retval = armv7m->load_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, &reg_value);
 239         buf_set_u32(armv7m->core_cache->reg_list[num].value, 0, 32, reg_value);
 240         armv7m->core_cache->reg_list[num].valid = 1;
 241         armv7m->core_cache->reg_list[num].dirty = 0;
 242
 243         return ERROR_OK;
 244 }
 245
 246 int armv7m_write_core_reg(struct target_s *target, int num)
 247 {
 248         int retval;
 249         u32 reg_value;
 250         armv7m_core_reg_t *armv7m_core_reg;
 251
 252         /* get pointers to arch-specific information */
 253         armv7m_common_t *armv7m = target->arch_info;
 254
 255         if ((num < 0) || (num >= ARMV7NUMCOREREGS))
 256                 return ERROR_INVALID_ARGUMENTS;
 257
 258         reg_value = buf_get_u32(armv7m->core_cache->reg_list[num].value, 0, 32);
 259         armv7m_core_reg = armv7m->core_cache->reg_list[num].arch_info;
 260         retval = armv7m->store_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, reg_value);
 261         if (retval != ERROR_OK)
 262         {
 263                 ERROR("JTAG failure");
 264                 armv7m->core_cache->reg_list[num].dirty = 1;
 265                 return ERROR_JTAG_DEVICE_ERROR;
 266         }
 267         DEBUG("write core reg %i value 0x%x", num , reg_value);
 268         armv7m->core_cache->reg_list[num].valid = 1;
 269         armv7m->core_cache->reg_list[num].dirty = 0;
 270
 271         return ERROR_OK;
 272 }
 273
 274 int armv7m_invalidate_core_regs(target_t *target)
 275 {
 276         /* get pointers to arch-specific information */
 277         armv7m_common_t *armv7m = target->arch_info;
 278         int i;
 279
 280         for (i = 0; i < armv7m->core_cache->num_regs; i++)
 281         {
 282                 armv7m->core_cache->reg_list[i].valid = 0;
 283                 armv7m->core_cache->reg_list[i].dirty = 0;
 284         }
 285
 286         return ERROR_OK;
 287 }
 288
 289 int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
 290 {
 291         /* get pointers to arch-specific information */
 292         armv7m_common_t *armv7m = target->arch_info;
 293         int i;
 294
 295         if (target->state != TARGET_HALTED)
 296         {
 297                 return ERROR_TARGET_NOT_HALTED;
 298         }
 299
 300         *reg_list_size = 26;
 301         *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
 302
 303         /* TODOLATER correct list of registers, names ? */
 304         for (i = 0; i < *reg_list_size; i++)
 305         {
 306                 if (i < ARMV7NUMCOREREGS)
 307                         (*reg_list)[i] = &armv7m->process_context->reg_list[i];
 308                         //(*reg_list)[i] = &armv7m->core_cache->reg_list[i];
 309                 else
 310                         (*reg_list)[i] = &armv7m_gdb_dummy_fp_reg;
 311         }
 312         /* ARMV7M is always in thumb mode, try to make GDB understand this if it does not support this arch */
 313         //armv7m->core_cache->reg_list[15].value[0] |= 1;
 314         armv7m->process_context->reg_list[15].value[0] |= 1;
 315         //armv7m->core_cache->reg_list[ARMV7M_xPSR].value[0] = (1<<5);
 316         //armv7m->process_context->reg_list[ARMV7M_xPSR].value[0] = (1<<5);
 317         (*reg_list)[25] = &armv7m->process_context->reg_list[ARMV7M_xPSR];
 318         //(*reg_list)[25] = &armv7m->process_context->reg_list[ARMV7M_xPSR];
 319         return ERROR_OK;
 320 }
 321
 322 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)
 323 {
 324         // get pointers to arch-specific information
 325         armv7m_common_t *armv7m = target->arch_info;
 326         armv7m_algorithm_t *armv7m_algorithm_info = arch_info;
 327         enum armv7m_state core_state = armv7m->core_state;
 328         enum armv7m_mode core_mode = armv7m->core_mode;
 329         int retval = ERROR_OK;
 330         u32 pc;
 331         int exit_breakpoint_size = 0;
 332         int i;
 333
 334         armv7m->core_state = core_state;
 335         armv7m->core_mode = core_mode;
 336
 337         if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
 338         {
 339                 ERROR("current target isn't an ARMV7M target");
 340                 return ERROR_TARGET_INVALID;
 341         }
 342
 343         if (target->state != TARGET_HALTED)
 344         {
 345                 WARNING("target not halted");
 346                 return ERROR_TARGET_NOT_HALTED;
 347         }
 348
 349         /* refresh core register cache */
 350         /* Not needed if core register cache is always consistent with target process state */
 351         armv7m_use_context(target, ARMV7M_DEBUG_CONTEXT);
 352
 353         for (i = 0; i < num_mem_params; i++)
 354         {
 355                 target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
 356         }
 357
 358         for (i = 0; i < num_reg_params; i++)
 359         {
 360                 reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
 361                 //reg_t *reg = register_get_by_name(armv7m->debug_context, reg_params[i].reg_name, 0);
 362                 //armv7m_core_reg_t * armv7m_core_reg = reg->arch_info;
 363                 u32 regvalue;
 364
 365                 if (!reg)
 366                 {
 367                         ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 368                         exit(-1);
 369                 }
 370
 371                 if (reg->size != reg_params[i].size)
 372                 {
 373                         ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 374                         exit(-1);
 375                 }
 376
 377                 regvalue = buf_get_u32(reg_params[i].value, 0, 32);
 378                 //armv7m->store_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, regvalue);
 379                 armv7m_set_core_reg(reg, reg_params[i].value);
 380         }
 381
 382         /* ARMV7M always runs in Thumb state */
 383         exit_breakpoint_size = 2;
 384         if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_SOFT)) != ERROR_OK)
 385         {
 386                 ERROR("can't add breakpoint to finish algorithm execution");
 387                 return ERROR_TARGET_FAILURE;
 388         }
 389
 390         /* This code relies on the target specific  resume() and  poll()->debug_entry()
 391         sequence to write register values to the processor and the read them back */
 392         target->type->resume(target, 0, entry_point, 1, 1);
 393         target->type->poll(target);
 394
 395         while (target->state != TARGET_HALTED)
 396         {
 397                 usleep(5000);
 398                 target->type->poll(target);
 399                 if ((timeout_ms -= 5) <= 0)
 400                 {
 401                         ERROR("timeout waiting for algorithm to complete, trying to halt target");
 402                         target->type->halt(target);
 403                         timeout_ms = 1000;
 404                         while (target->state != TARGET_HALTED)
 405                         {
 406                                 usleep(10000);
 407                                 target->type->poll(target);
 408                                 if ((timeout_ms -= 10) <= 0)
 409                                 {
 410                                         ERROR("target didn't reenter debug state, exiting");
 411                                         exit(-1);
 412                                 }
 413                         }
 414                         armv7m->load_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 15, &pc);
 415                         DEBUG("failed algoritm halted at 0x%x ", pc);
 416                         retval = ERROR_TARGET_TIMEOUT;
 417                 }
 418         }
 419
 420         breakpoint_remove(target, exit_point);
 421
 422         /* Read memory values to mem_params[] */
 423         for (i = 0; i < num_mem_params; i++)
 424         {
 425                 if (mem_params[i].direction != PARAM_OUT)
 426                         target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
 427         }
 428
 429         /* Copy core register values to reg_params[] */
 430         for (i = 0; i < num_reg_params; i++)
 431         {
 432                 if (reg_params[i].direction != PARAM_OUT)
 433                 {
 434                         //reg_t *reg = register_get_by_name(armv7m->core_cache, reg_params[i].reg_name, 0);
 435                         reg_t *reg = register_get_by_name(armv7m->debug_context, reg_params[i].reg_name, 0);
 436                         u32 regvalue;
 437
 438                         if (!reg)
 439                         {
 440                                 ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 441                                 exit(-1);
 442                         }
 443
 444                         if (reg->size != reg_params[i].size)
 445                         {
 446                                 ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 447                                 exit(-1);
 448                         }
 449
 450                         armv7m_core_reg_t *armv7m_core_reg = reg->arch_info;
 451                         //armv7m->load_core_reg_u32(target, armv7m_core_reg->type, armv7m_core_reg->num, &regvalue);
 452                         //buf_set_u32(reg_params[i].value, 0, 32, regvalue);
 453                         buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
 454                 }
 455         }
 456
 457         /* Mark all core registers !! except control !! as valid but dirty */
 458         /* This will be done by armv7m_use_context in resume function */
 459         //for (i = 0; i < armv7m->core_cache->num_regs-1; i++)
 460         //{
 461         //      armv7m->core_cache->reg_list[i].dirty = 1;
 462         //}
 463
 464         // ????armv7m->core_state = core_state;
 465         // ????armv7m->core_mode = core_mode;
 466
 467         return retval;
 468 }
 469
 470 int armv7m_arch_state(struct target_s *target, char *buf, int buf_size)
 471 {
 472         /* get pointers to arch-specific information */
 473         armv7m_common_t *armv7m = target->arch_info;
 474
 475         snprintf(buf, buf_size,
 476                  "target halted in %s state due to %s, current mode: %s %s\nxPSR: 0x%8.8x pc: 0x%8.8x",
 477                  armv7m_state_strings[armv7m->core_state],
 478                  target_debug_reason_strings[target->debug_reason],
 479                  armv7m_mode_strings[armv7m->core_mode],
 480                  armv7m_exception_string(armv7m->exception_number),
 481                  buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32),
 482                  buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32));
 483
 484         return ERROR_OK;
 485 }
 486
 487 reg_cache_t *armv7m_build_reg_cache(target_t *target)
 488 {
 489         /* get pointers to arch-specific information */
 490         armv7m_common_t *armv7m = target->arch_info;
 491         arm_jtag_t *jtag_info = &armv7m->jtag_info;
 492
 493         int num_regs = ARMV7NUMCOREREGS;
 494         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 495         reg_cache_t *cache = malloc(sizeof(reg_cache_t));
 496         reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
 497         armv7m_core_reg_t *arch_info = malloc(sizeof(armv7m_core_reg_t) * num_regs);
 498         int i;
 499
 500         if (armv7m_core_reg_arch_type == -1)
 501                 armv7m_core_reg_arch_type = register_reg_arch_type(armv7m_get_core_reg, armv7m_set_core_reg);
 502
 503         /* Build the process context cache */
 504         cache->name = "arm v7m registers";
 505         cache->next = NULL;
 506         cache->reg_list = reg_list;
 507         cache->num_regs = num_regs;
 508         (*cache_p) = cache;
 509         armv7m->core_cache = cache;
 510         armv7m->process_context = cache;
 511
 512         for (i = 0; i < num_regs; i++)
 513         {
 514                 arch_info[i] = armv7m_core_reg_list_arch_info[i];
 515                 arch_info[i].target = target;
 516                 arch_info[i].armv7m_common = armv7m;
 517                 reg_list[i].name = armv7m_core_reg_list[i];
 518                 reg_list[i].size = 32;
 519                 reg_list[i].value = calloc(1, 4);
 520                 reg_list[i].dirty = 0;
 521                 reg_list[i].valid = 0;
 522                 reg_list[i].bitfield_desc = NULL;
 523                 reg_list[i].num_bitfields = 0;
 524                 reg_list[i].arch_type = armv7m_core_reg_arch_type;
 525                 reg_list[i].arch_info = &arch_info[i];
 526         }
 527
 528         /* Build the debug context cache*/
 529         cache = malloc(sizeof(reg_cache_t));
 530         reg_list = malloc(sizeof(reg_t) * num_regs);
 531
 532         cache->name = "arm v7m debug registers";
 533         cache->next = NULL;
 534         cache->reg_list = reg_list;
 535         cache->num_regs = num_regs;
 536         armv7m->debug_context = cache;
 537         armv7m->process_context->next = cache;
 538
 539         for (i = 0; i < num_regs; i++)
 540         {
 541                 reg_list[i].name = armv7m_core_dbgreg_list[i];
 542                 reg_list[i].size = 32;
 543                 reg_list[i].value = calloc(1, 4);
 544                 reg_list[i].dirty = 0;
 545                 reg_list[i].valid = 0;
 546                 reg_list[i].bitfield_desc = NULL;
 547                 reg_list[i].num_bitfields = 0;
 548                 reg_list[i].arch_type = armv7m_core_reg_arch_type;
 549                 reg_list[i].arch_info = &arch_info[i];
 550         }
 551
 552     return cache;
 553 }
 554
 555 int armv7m_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 556 {
 557         armv7m_build_reg_cache(target);
 558
 559         return ERROR_OK;
 560 }
 561
 562 int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m)
 563 {
 564         /* register arch-specific functions */
 565
 566         target->arch_info = armv7m;
 567         armv7m->core_state = ARMV7M_STATE_THUMB;
 568         armv7m->read_core_reg = armv7m_read_core_reg;
 569         armv7m->write_core_reg = armv7m_write_core_reg;
 570
 571         return ERROR_OK;
 572 }
 573
 574 int armv7m_register_commands(struct command_context_s *cmd_ctx)
 575 {
 576         int retval;
 577
 578         return ERROR_OK;
 579 }