git.sur5r.net Git - openocd/blob - src/target/arm7_9_common.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "embeddedice.h"
  27 #include "target.h"
  28 #include "target_request.h"
  29 #include "armv4_5.h"
  30 #include "arm_jtag.h"
  31 #include "jtag.h"
  32 #include "log.h"
  33 #include "arm7_9_common.h"
  34 #include "breakpoints.h"
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <sys/time.h>
  43 #include <errno.h>
  44
  45 int arm7_9_debug_entry(target_t *target);
  46 int arm7_9_enable_sw_bkpts(struct target_s *target);
  47
  48 /* command handler forward declarations */
  49 int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  50 int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  51 int handle_arm7_9_read_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  52 int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  53 int handle_arm7_9_sw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  54 int handle_arm7_9_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  55 int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  56 int handle_arm7_9_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  57 int handle_arm7_9_dcc_downloads_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  58 int handle_arm7_9_etm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  59
  60 int arm7_9_reinit_embeddedice(target_t *target)
  61 {
  62         armv4_5_common_t *armv4_5 = target->arch_info;
  63         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  64
  65         breakpoint_t *breakpoint = target->breakpoints;
  66
  67         arm7_9->wp_available = 2;
  68         arm7_9->wp0_used = 0;
  69         arm7_9->wp1_used = 0;
  70
  71         /* mark all hardware breakpoints as unset */
  72         while (breakpoint)
  73         {
  74                 if (breakpoint->type == BKPT_HARD)
  75                 {
  76                         breakpoint->set = 0;
  77                 }
  78                 breakpoint = breakpoint->next;
  79         }
  80
  81         if (arm7_9->sw_bkpts_enabled && arm7_9->sw_bkpts_use_wp)
  82         {
  83                 arm7_9->sw_bkpts_enabled = 0;
  84                 arm7_9_enable_sw_bkpts(target);
  85         }
  86
  87         arm7_9->reinit_embeddedice = 0;
  88
  89         return ERROR_OK;
  90 }
  91
  92 int arm7_9_jtag_callback(enum jtag_event event, void *priv)
  93 {
  94         target_t *target = priv;
  95         armv4_5_common_t *armv4_5 = target->arch_info;
  96         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  97
  98         /* a test-logic reset occured
  99          * the EmbeddedICE registers have been reset
 100          * hardware breakpoints have been cleared
 101          */
 102         if (event == JTAG_TRST_ASSERTED)
 103         {
 104                 arm7_9->reinit_embeddedice = 1;
 105         }
 106
 107         return ERROR_OK;
 108 }
 109
 110 int arm7_9_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p)
 111 {
 112         armv4_5_common_t *armv4_5 = target->arch_info;
 113         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 114
 115         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 116         {
 117                 return -1;
 118         }
 119
 120         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 121         {
 122                 return -1;
 123         }
 124
 125         *armv4_5_p = armv4_5;
 126         *arm7_9_p = arm7_9;
 127
 128         return ERROR_OK;
 129 }
 130
 131 int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 132 {
 133         armv4_5_common_t *armv4_5 = target->arch_info;
 134         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 135
 136         if (target->state != TARGET_HALTED)
 137         {
 138                 LOG_WARNING("target not halted");
 139                 return ERROR_TARGET_NOT_HALTED;
 140         }
 141
 142         if (arm7_9->force_hw_bkpts)
 143                 breakpoint->type = BKPT_HARD;
 144
 145         if (breakpoint->set)
 146         {
 147                 LOG_WARNING("breakpoint already set");
 148                 return ERROR_OK;
 149         }
 150
 151         if (breakpoint->type == BKPT_HARD)
 152         {
 153                 /* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
 154                 u32 mask = (breakpoint->length == 4) ? 0x3u : 0x1u;
 155                 if (!arm7_9->wp0_used)
 156                 {
 157                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], breakpoint->address);
 158                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
 159                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffffu);
 160                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
 161                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
 162
 163                         jtag_execute_queue();
 164                         arm7_9->wp0_used = 1;
 165                         breakpoint->set = 1;
 166                 }
 167                 else if (!arm7_9->wp1_used)
 168                 {
 169                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], breakpoint->address);
 170                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
 171                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffffu);
 172                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
 173                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
 174
 175                         jtag_execute_queue();
 176                         arm7_9->wp1_used = 1;
 177                         breakpoint->set = 2;
 178                 }
 179                 else
 180                 {
 181                         LOG_ERROR("BUG: no hardware comparator available");
 182                         return ERROR_OK;
 183                 }
 184         }
 185         else if (breakpoint->type == BKPT_SOFT)
 186         {
 187                 if (breakpoint->length == 4)
 188                 {
 189                         u32 verify = 0xffffffff;
 190                         /* keep the original instruction in target endianness */
 191                         target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
 192                         /* write the breakpoint instruction in target endianness (arm7_9->arm_bkpt is host endian) */
 193                         target_write_u32(target, breakpoint->address, arm7_9->arm_bkpt);
 194
 195                         target->type->read_memory(target, breakpoint->address, 4, 1, (u8 *)&verify);
 196                         if (verify != arm7_9->arm_bkpt)
 197                         {
 198                                 LOG_ERROR("Unable to set 32 bit software breakpoint at address %08x", breakpoint->address);
 199                                 return ERROR_OK;
 200                         }
 201                 }
 202                 else
 203                 {
 204                         u16 verify = 0xffff;
 205                         /* keep the original instruction in target endianness */
 206                         target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
 207                         /* write the breakpoint instruction in target endianness (arm7_9->thumb_bkpt is host endian) */
 208                         target_write_u16(target, breakpoint->address, arm7_9->thumb_bkpt);
 209
 210                         target->type->read_memory(target, breakpoint->address, 2, 1, (u8 *)&verify);
 211                         if (verify != arm7_9->thumb_bkpt)
 212                         {
 213                                 LOG_ERROR("Unable to set thumb software breakpoint at address %08x", breakpoint->address);
 214                                 return ERROR_OK;
 215                         }
 216                 }
 217                 breakpoint->set = 1;
 218         }
 219
 220         return ERROR_OK;
 221
 222 }
 223
 224 int arm7_9_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 225 {
 226         armv4_5_common_t *armv4_5 = target->arch_info;
 227         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 228
 229         if (target->state != TARGET_HALTED)
 230         {
 231                 LOG_WARNING("target not halted");
 232                 return ERROR_TARGET_NOT_HALTED;
 233         }
 234
 235         if (!breakpoint->set)
 236         {
 237                 LOG_WARNING("breakpoint not set");
 238                 return ERROR_OK;
 239         }
 240
 241         if (breakpoint->type == BKPT_HARD)
 242         {
 243                 if (breakpoint->set == 1)
 244                 {
 245                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
 246                         jtag_execute_queue();
 247                         arm7_9->wp0_used = 0;
 248                 }
 249                 else if (breakpoint->set == 2)
 250                 {
 251                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
 252                         jtag_execute_queue();
 253                         arm7_9->wp1_used = 0;
 254                 }
 255                 breakpoint->set = 0;
 256         }
 257         else
 258         {
 259                 /* restore original instruction (kept in target endianness) */
 260                 if (breakpoint->length == 4)
 261                 {
 262                         u32 current_instr;
 263                         /* check that user program as not modified breakpoint instruction */
 264                         target->type->read_memory(target, breakpoint->address, 4, 1, (u8*)&current_instr);
 265                         if (current_instr==arm7_9->arm_bkpt)
 266                                 target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
 267                 }
 268                 else
 269                 {
 270                         u16 current_instr;
 271                         /* check that user program as not modified breakpoint instruction */
 272                         target->type->read_memory(target, breakpoint->address, 2, 1, (u8*)&current_instr);
 273                         if (current_instr==arm7_9->thumb_bkpt)
 274                                 target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
 275                 }
 276                 breakpoint->set = 0;
 277         }
 278
 279         return ERROR_OK;
 280 }
 281
 282 int arm7_9_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 283 {
 284         armv4_5_common_t *armv4_5 = target->arch_info;
 285         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 286
 287         if (target->state != TARGET_HALTED)
 288         {
 289                 LOG_WARNING("target not halted");
 290                 return ERROR_TARGET_NOT_HALTED;
 291         }
 292
 293         if (arm7_9->force_hw_bkpts)
 294         {
 295                 LOG_DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
 296                 breakpoint->type = BKPT_HARD;
 297         }
 298
 299         if ((breakpoint->type == BKPT_SOFT) && (arm7_9->sw_bkpts_enabled == 0))
 300         {
 301                 LOG_INFO("sw breakpoint requested, but software breakpoints not enabled");
 302                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 303         }
 304
 305         if ((breakpoint->type == BKPT_HARD) && (arm7_9->wp_available < 1))
 306         {
 307                 LOG_INFO("no watchpoint unit available for hardware breakpoint");
 308                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 309         }
 310
 311         if ((breakpoint->length != 2) && (breakpoint->length != 4))
 312         {
 313                 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
 314                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 315         }
 316
 317         if (breakpoint->type == BKPT_HARD)
 318                 arm7_9->wp_available--;
 319
 320         return ERROR_OK;
 321 }
 322
 323 int arm7_9_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 324 {
 325         armv4_5_common_t *armv4_5 = target->arch_info;
 326         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 327
 328         if (target->state != TARGET_HALTED)
 329         {
 330                 LOG_WARNING("target not halted");
 331                 return ERROR_TARGET_NOT_HALTED;
 332         }
 333
 334         if (breakpoint->set)
 335         {
 336                 arm7_9_unset_breakpoint(target, breakpoint);
 337         }
 338
 339         if (breakpoint->type == BKPT_HARD)
 340                 arm7_9->wp_available++;
 341
 342         return ERROR_OK;
 343 }
 344
 345 int arm7_9_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 346 {
 347         armv4_5_common_t *armv4_5 = target->arch_info;
 348         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 349         int rw_mask = 1;
 350         u32 mask;
 351
 352         mask = watchpoint->length - 1;
 353
 354         if (target->state != TARGET_HALTED)
 355         {
 356                 LOG_WARNING("target not halted");
 357                 return ERROR_TARGET_NOT_HALTED;
 358         }
 359
 360         if (watchpoint->rw == WPT_ACCESS)
 361                 rw_mask = 0;
 362         else
 363                 rw_mask = 1;
 364
 365         if (!arm7_9->wp0_used)
 366         {
 367                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], watchpoint->address);
 368                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
 369                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], watchpoint->mask);
 370                 if( watchpoint->mask != 0xffffffffu )
 371                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], watchpoint->value);
 372                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
 373                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
 374
 375                 jtag_execute_queue();
 376                 watchpoint->set = 1;
 377                 arm7_9->wp0_used = 2;
 378         }
 379         else if (!arm7_9->wp1_used)
 380         {
 381                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], watchpoint->address);
 382                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
 383                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], watchpoint->mask);
 384                 if( watchpoint->mask != 0xffffffffu )
 385                         embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], watchpoint->value);
 386                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], 0xff & ~EICE_W_CTRL_nOPC & ~rw_mask);
 387                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE | EICE_W_CTRL_nOPC | (watchpoint->rw & 1));
 388
 389                 jtag_execute_queue();
 390                 watchpoint->set = 2;
 391                 arm7_9->wp1_used = 2;
 392         }
 393         else
 394         {
 395                 LOG_ERROR("BUG: no hardware comparator available");
 396                 return ERROR_OK;
 397         }
 398
 399         return ERROR_OK;
 400 }
 401
 402 int arm7_9_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 403 {
 404         armv4_5_common_t *armv4_5 = target->arch_info;
 405         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 406
 407         if (target->state != TARGET_HALTED)
 408         {
 409                 LOG_WARNING("target not halted");
 410                 return ERROR_TARGET_NOT_HALTED;
 411         }
 412
 413         if (!watchpoint->set)
 414         {
 415                 LOG_WARNING("breakpoint not set");
 416                 return ERROR_OK;
 417         }
 418
 419         if (watchpoint->set == 1)
 420         {
 421                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
 422                 jtag_execute_queue();
 423                 arm7_9->wp0_used = 0;
 424         }
 425         else if (watchpoint->set == 2)
 426         {
 427                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
 428                 jtag_execute_queue();
 429                 arm7_9->wp1_used = 0;
 430         }
 431         watchpoint->set = 0;
 432
 433         return ERROR_OK;
 434 }
 435
 436 int arm7_9_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 437 {
 438         armv4_5_common_t *armv4_5 = target->arch_info;
 439         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 440
 441         if (target->state != TARGET_HALTED)
 442         {
 443                 LOG_WARNING("target not halted");
 444                 return ERROR_TARGET_NOT_HALTED;
 445         }
 446
 447         if (arm7_9->wp_available < 1)
 448         {
 449                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 450         }
 451
 452         if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
 453         {
 454                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 455         }
 456
 457         arm7_9->wp_available--;
 458
 459         return ERROR_OK;
 460 }
 461
 462 int arm7_9_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 463 {
 464         armv4_5_common_t *armv4_5 = target->arch_info;
 465         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 466
 467         if (target->state != TARGET_HALTED)
 468         {
 469                 LOG_WARNING("target not halted");
 470                 return ERROR_TARGET_NOT_HALTED;
 471         }
 472
 473         if (watchpoint->set)
 474         {
 475                 arm7_9_unset_watchpoint(target, watchpoint);
 476         }
 477
 478         arm7_9->wp_available++;
 479
 480         return ERROR_OK;
 481 }
 482
 483 int arm7_9_enable_sw_bkpts(struct target_s *target)
 484 {
 485         armv4_5_common_t *armv4_5 = target->arch_info;
 486         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 487         int retval;
 488
 489         if (arm7_9->sw_bkpts_enabled)
 490                 return ERROR_OK;
 491
 492         if (arm7_9->wp_available < 1)
 493         {
 494                 LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
 495                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 496         }
 497         arm7_9->wp_available--;
 498
 499         if (!arm7_9->wp0_used)
 500         {
 501                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
 502                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
 503                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
 504                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
 505                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
 506                 arm7_9->sw_bkpts_enabled = 1;
 507                 arm7_9->wp0_used = 3;
 508         }
 509         else if (!arm7_9->wp1_used)
 510         {
 511                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
 512                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
 513                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
 514                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
 515                 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
 516                 arm7_9->sw_bkpts_enabled = 2;
 517                 arm7_9->wp1_used = 3;
 518         }
 519         else
 520         {
 521                 LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
 522                 exit(-1);
 523         }
 524
 525         if ((retval = jtag_execute_queue()) != ERROR_OK)
 526         {
 527                 LOG_ERROR("error writing EmbeddedICE registers to enable sw breakpoints");
 528                 exit(-1);
 529         };
 530
 531         return ERROR_OK;
 532 }
 533
 534 int arm7_9_disable_sw_bkpts(struct target_s *target)
 535 {
 536         armv4_5_common_t *armv4_5 = target->arch_info;
 537         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 538
 539         if (!arm7_9->sw_bkpts_enabled)
 540                 return ERROR_OK;
 541
 542         if (arm7_9->sw_bkpts_enabled == 1)
 543         {
 544                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
 545                 arm7_9->sw_bkpts_enabled = 0;
 546                 arm7_9->wp0_used = 0;
 547                 arm7_9->wp_available++;
 548         }
 549         else if (arm7_9->sw_bkpts_enabled == 2)
 550         {
 551                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
 552                 arm7_9->sw_bkpts_enabled = 0;
 553                 arm7_9->wp1_used = 0;
 554                 arm7_9->wp_available++;
 555         }
 556
 557         return ERROR_OK;
 558 }
 559
 560 int arm7_9_execute_sys_speed(struct target_s *target)
 561 {
 562         int timeout;
 563         int retval;
 564
 565         armv4_5_common_t *armv4_5 = target->arch_info;
 566         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 567         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 568         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 569
 570         /* set RESTART instruction */
 571         jtag_add_end_state(TAP_RTI);
 572         arm_jtag_set_instr(jtag_info, 0x4, NULL);
 573
 574         for (timeout=0; timeout<50; timeout++)
 575         {
 576                 /* read debug status register */
 577                 embeddedice_read_reg(dbg_stat);
 578                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 579                         return retval;
 580                 if ((buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
 581                                    && (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_SYSCOMP, 1)))
 582                         break;
 583                 usleep(100000);
 584         }
 585         if (timeout == 50)
 586         {
 587                 LOG_ERROR("timeout waiting for SYSCOMP & DBGACK, last DBG_STATUS: %x", buf_get_u32(dbg_stat->value, 0, dbg_stat->size));
 588                 return ERROR_TARGET_TIMEOUT;
 589         }
 590
 591         return ERROR_OK;
 592 }
 593
 594 int arm7_9_execute_fast_sys_speed(struct target_s *target)
 595 {
 596         static int set=0;
 597         static u8 check_value[4], check_mask[4];
 598
 599         armv4_5_common_t *armv4_5 = target->arch_info;
 600         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 601         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 602         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 603
 604         /* set RESTART instruction */
 605         jtag_add_end_state(TAP_RTI);
 606         arm_jtag_set_instr(jtag_info, 0x4, NULL);
 607
 608         if (!set)
 609         {
 610                 /* check for DBGACK and SYSCOMP set (others don't care) */
 611
 612                 /* NB! These are constants that must be available until after next jtag_execute() and
 613                    we evaluate the values upon first execution in lieu of setting up these constants
 614                    during early setup.
 615                 */
 616                 buf_set_u32(check_value, 0, 32, 0x9);
 617                 buf_set_u32(check_mask, 0, 32, 0x9);
 618                 set=1;
 619         }
 620
 621         /* read debug status register */
 622         embeddedice_read_reg_w_check(dbg_stat, check_value, check_value);
 623
 624         return ERROR_OK;
 625 }
 626
 627 int arm7_9_target_request_data(target_t *target, u32 size, u8 *buffer)
 628 {
 629         armv4_5_common_t *armv4_5 = target->arch_info;
 630         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 631         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 632         u32 *data;
 633         int i;
 634
 635         data = malloc(size * (sizeof(u32)));
 636
 637         embeddedice_receive(jtag_info, data, size);
 638
 639         for (i = 0; i < size; i++)
 640         {
 641                 h_u32_to_le(buffer + (i * 4), data[i]);
 642         }
 643
 644         free(data);
 645
 646         return ERROR_OK;
 647 }
 648
 649 int arm7_9_handle_target_request(void *priv)
 650 {
 651         target_t *target = priv;
 652         armv4_5_common_t *armv4_5 = target->arch_info;
 653         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 654         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 655         reg_t *dcc_control = &arm7_9->eice_cache->reg_list[EICE_COMMS_CTRL];
 656
 657         if (!target->dbg_msg_enabled)
 658                 return ERROR_OK;
 659
 660         if (target->state == TARGET_RUNNING)
 661         {
 662                 /* read DCC control register */
 663                 embeddedice_read_reg(dcc_control);
 664                 jtag_execute_queue();
 665
 666                 /* check W bit */
 667                 if (buf_get_u32(dcc_control->value, 1, 1) == 1)
 668                 {
 669                         u32 request;
 670
 671                         embeddedice_receive(jtag_info, &request, 1);
 672                         target_request(target, request);
 673                 }
 674         }
 675
 676         return ERROR_OK;
 677 }
 678
 679 int arm7_9_poll(target_t *target)
 680 {
 681         int retval;
 682         armv4_5_common_t *armv4_5 = target->arch_info;
 683         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 684         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 685
 686         if (arm7_9->reinit_embeddedice)
 687         {
 688                 arm7_9_reinit_embeddedice(target);
 689         }
 690
 691         /* read debug status register */
 692         embeddedice_read_reg(dbg_stat);
 693         if ((retval = jtag_execute_queue()) != ERROR_OK)
 694         {
 695                 return retval;
 696         }
 697
 698         if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1))
 699         {
 700                 LOG_DEBUG("DBGACK set, dbg_state->value: 0x%x", buf_get_u32(dbg_stat->value, 0, 32));
 701                 if (target->state == TARGET_UNKNOWN)
 702                 {
 703                         target->state = TARGET_RUNNING;
 704                         LOG_WARNING("DBGACK set while target was in unknown state. Reset or initialize target.");
 705                 }
 706                 if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET))
 707                 {
 708                         target->state = TARGET_HALTED;
 709                         if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
 710                                 return retval;
 711
 712                         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 713                 }
 714                 if (target->state == TARGET_DEBUG_RUNNING)
 715                 {
 716                         target->state = TARGET_HALTED;
 717                         if ((retval = arm7_9_debug_entry(target)) != ERROR_OK)
 718                                 return retval;
 719
 720                         target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
 721                 }
 722                 if (target->state != TARGET_HALTED)
 723                 {
 724                         LOG_WARNING("DBGACK set, but the target did not end up in the halted stated %d", target->state);
 725                 }
 726         }
 727         else
 728         {
 729                 if (target->state != TARGET_DEBUG_RUNNING)
 730                         target->state = TARGET_RUNNING;
 731         }
 732
 733         return ERROR_OK;
 734 }
 735
 736 int arm7_9_assert_reset(target_t *target)
 737 {
 738         LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
 739
 740         if (!(jtag_reset_config & RESET_HAS_SRST))
 741         {
 742                 LOG_ERROR("Can't assert SRST");
 743                 return ERROR_FAIL;
 744         }
 745
 746         if (target->state == TARGET_HALTED || target->state == TARGET_UNKNOWN)
 747         {
 748                 /* if the target wasn't running, there might be working areas allocated */
 749                 target_free_all_working_areas(target);
 750
 751                 /* assert SRST and TRST */
 752                 /* system would get ouf sync if we didn't reset test-logic, too */
 753                 jtag_add_reset(1, 1);
 754
 755                 jtag_add_sleep(5000);
 756
 757         }
 758
 759         if (jtag_reset_config & RESET_SRST_PULLS_TRST)
 760         {
 761                 jtag_add_reset(1, 1);
 762         } else
 763         {
 764                 jtag_add_reset(0, 1);
 765         }
 766
 767         target->state = TARGET_RESET;
 768         jtag_add_sleep(50000);
 769
 770         armv4_5_invalidate_core_regs(target);
 771
 772         return ERROR_OK;
 773
 774 }
 775
 776 int arm7_9_deassert_reset(target_t *target)
 777 {
 778         LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
 779
 780         /* deassert reset lines */
 781         jtag_add_reset(0, 0);
 782
 783         return ERROR_OK;
 784 }
 785
 786 int arm7_9_clear_halt(target_t *target)
 787 {
 788         armv4_5_common_t *armv4_5 = target->arch_info;
 789         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 790         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 791
 792         /* we used DBGRQ only if we didn't come out of reset */
 793         if (!arm7_9->debug_entry_from_reset && arm7_9->use_dbgrq)
 794         {
 795                 /* program EmbeddedICE Debug Control Register to deassert DBGRQ
 796                  */
 797                 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
 798                 embeddedice_store_reg(dbg_ctrl);
 799         }
 800         else
 801         {
 802                 if (arm7_9->debug_entry_from_reset && arm7_9->has_vector_catch)
 803                 {
 804                         /* if we came out of reset, and vector catch is supported, we used
 805                          * vector catch to enter debug state
 806                          * restore the register in that case
 807                          */
 808                         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH]);
 809                 }
 810                 else
 811                 {
 812                         /* restore registers if watchpoint unit 0 was in use
 813                          */
 814                         if (arm7_9->wp0_used)
 815                         {
 816                                 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
 817                                 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
 818                                 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
 819                         }
 820                         /* control value always has to be restored, as it was either disabled,
 821                          * or enabled with possibly different bits
 822                          */
 823                         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
 824                 }
 825         }
 826
 827         return ERROR_OK;
 828 }
 829
 830 int arm7_9_soft_reset_halt(struct target_s *target)
 831 {
 832         armv4_5_common_t *armv4_5 = target->arch_info;
 833         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 834         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 835         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 836         int i;
 837         int retval;
 838
 839         if ((retval=target->type->halt(target))!=ERROR_OK)
 840                 return retval;
 841
 842         for (i=0; i<10; i++)
 843         {
 844                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) != 0)
 845                         break;
 846                 embeddedice_read_reg(dbg_stat);
 847                 if ((retval=jtag_execute_queue())!=ERROR_OK)
 848                         return retval;
 849                 /* do not eat all CPU, time out after 1 se*/
 850                 usleep(100*1000);
 851
 852         }
 853         if (i==10)
 854         {
 855                 LOG_ERROR("Failed to halt CPU after 1 sec");
 856                 return ERROR_TARGET_TIMEOUT;
 857         }
 858         target->state = TARGET_HALTED;
 859
 860         /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
 861          * ensure that DBGRQ is cleared
 862          */
 863         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
 864         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
 865         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
 866         embeddedice_store_reg(dbg_ctrl);
 867
 868         arm7_9_clear_halt(target);
 869
 870         /* if the target is in Thumb state, change to ARM state */
 871         if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
 872         {
 873                 u32 r0_thumb, pc_thumb;
 874                 LOG_DEBUG("target entered debug from Thumb state, changing to ARM");
 875                 /* Entered debug from Thumb mode */
 876                 armv4_5->core_state = ARMV4_5_STATE_THUMB;
 877                 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
 878         }
 879
 880         /* all register content is now invalid */
 881         armv4_5_invalidate_core_regs(target);
 882
 883         /* SVC, ARM state, IRQ and FIQ disabled */
 884         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 885         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 886         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 887
 888         /* start fetching from 0x0 */
 889         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 890         armv4_5->core_cache->reg_list[15].dirty = 1;
 891         armv4_5->core_cache->reg_list[15].valid = 1;
 892
 893         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 894         armv4_5->core_state = ARMV4_5_STATE_ARM;
 895
 896         /* reset registers */
 897         for (i = 0; i <= 14; i++)
 898         {
 899                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, 0xffffffff);
 900                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 1;
 901                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
 902         }
 903
 904         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 905
 906         return ERROR_OK;
 907 }
 908
 909 int arm7_9_prepare_reset_halt(target_t *target)
 910 {
 911         armv4_5_common_t *armv4_5 = target->arch_info;
 912         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 913
 914         /* poll the target, and resume if it was currently halted */
 915         arm7_9_poll(target);
 916         if (target->state == TARGET_HALTED)
 917         {
 918                 arm7_9_resume(target, 1, 0x0, 0, 1);
 919         }
 920
 921         if (arm7_9->has_vector_catch)
 922         {
 923                 /* program vector catch register to catch reset vector */
 924                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH], 0x1);
 925         }
 926         else
 927         {
 928                 /* program watchpoint unit to match on reset vector address */
 929                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0x3);
 930                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
 931                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x100);
 932                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xf7);
 933         }
 934
 935         return ERROR_OK;
 936 }
 937
 938 int arm7_9_halt(target_t *target)
 939 {
 940         armv4_5_common_t *armv4_5 = target->arch_info;
 941         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 942         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 943
 944         LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
 945
 946         if (target->state == TARGET_HALTED)
 947         {
 948                 LOG_WARNING("target was already halted");
 949                 return ERROR_OK;
 950         }
 951
 952         if (target->state == TARGET_UNKNOWN)
 953         {
 954                 LOG_WARNING("target was in unknown state when halt was requested");
 955         }
 956
 957         if (target->state == TARGET_RESET)
 958         {
 959                 if ((jtag_reset_config & RESET_SRST_PULLS_TRST) && jtag_srst)
 960                 {
 961                         LOG_ERROR("can't request a halt while in reset if nSRST pulls nTRST");
 962                         return ERROR_TARGET_FAILURE;
 963                 }
 964                 else
 965                 {
 966                         /* we came here in a reset_halt or reset_init sequence
 967                          * debug entry was already prepared in arm7_9_prepare_reset_halt()
 968                          */
 969                         target->debug_reason = DBG_REASON_DBGRQ;
 970
 971                         return ERROR_OK;
 972                 }
 973         }
 974
 975         if (arm7_9->use_dbgrq)
 976         {
 977                 /* program EmbeddedICE Debug Control Register to assert DBGRQ
 978                  */
 979                 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 1);
 980                 embeddedice_store_reg(dbg_ctrl);
 981         }
 982         else
 983         {
 984                 /* program watchpoint unit to match on any address
 985                  */
 986                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
 987                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
 988                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x100);
 989                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xf7);
 990         }
 991
 992         target->debug_reason = DBG_REASON_DBGRQ;
 993
 994         return ERROR_OK;
 995 }
 996
 997 int arm7_9_debug_entry(target_t *target)
 998 {
 999         int i;
1000         u32 context[16];
1001         u32* context_p[16];
1002         u32 r0_thumb, pc_thumb;
1003         u32 cpsr;
1004         int retval;
1005         /* get pointers to arch-specific information */
1006         armv4_5_common_t *armv4_5 = target->arch_info;
1007         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1008         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
1009         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1010
1011 #ifdef _DEBUG_ARM7_9_
1012         LOG_DEBUG("-");
1013 #endif
1014
1015         if (arm7_9->pre_debug_entry)
1016                 arm7_9->pre_debug_entry(target);
1017
1018         /* program EmbeddedICE Debug Control Register to assert DBGACK and INTDIS
1019          * ensure that DBGRQ is cleared
1020          */
1021         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
1022         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGRQ, 1, 0);
1023         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 1);
1024         embeddedice_store_reg(dbg_ctrl);
1025
1026         arm7_9_clear_halt(target);
1027
1028         if ((retval = jtag_execute_queue()) != ERROR_OK)
1029         {
1030                 switch (retval)
1031                 {
1032                         case ERROR_JTAG_QUEUE_FAILED:
1033                                 LOG_ERROR("JTAG queue failed while writing EmbeddedICE control register");
1034                                 exit(-1);
1035                                 break;
1036                         default:
1037                                 break;
1038                 }
1039         }
1040
1041         if ((retval = arm7_9->examine_debug_reason(target)) != ERROR_OK)
1042                 return retval;
1043
1044
1045         if (target->state != TARGET_HALTED)
1046         {
1047                 LOG_WARNING("target not halted");
1048                 return ERROR_TARGET_NOT_HALTED;
1049         }
1050
1051         /* if the target is in Thumb state, change to ARM state */
1052         if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_ITBIT, 1))
1053         {
1054                 LOG_DEBUG("target entered debug from Thumb state");
1055                 /* Entered debug from Thumb mode */
1056                 armv4_5->core_state = ARMV4_5_STATE_THUMB;
1057                 arm7_9->change_to_arm(target, &r0_thumb, &pc_thumb);
1058                 LOG_DEBUG("r0_thumb: 0x%8.8x, pc_thumb: 0x%8.8x", r0_thumb, pc_thumb);
1059         }
1060         else
1061         {
1062                 LOG_DEBUG("target entered debug from ARM state");
1063                 /* Entered debug from ARM mode */
1064                 armv4_5->core_state = ARMV4_5_STATE_ARM;
1065         }
1066
1067         for (i = 0; i < 16; i++)
1068                 context_p[i] = &context[i];
1069         /* save core registers (r0 - r15 of current core mode) */
1070         arm7_9->read_core_regs(target, 0xffff, context_p);
1071
1072         arm7_9->read_xpsr(target, &cpsr, 0);
1073
1074         if ((retval = jtag_execute_queue()) != ERROR_OK)
1075                 return retval;
1076
1077         /* if the core has been executing in Thumb state, set the T bit */
1078         if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1079                 cpsr |= 0x20;
1080
1081         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
1082         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
1083         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1084
1085         armv4_5->core_mode = cpsr & 0x1f;
1086
1087         if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
1088         {
1089                 target->state = TARGET_UNKNOWN;
1090                 LOG_ERROR("cpsr contains invalid mode value - communication failure");
1091                 return ERROR_TARGET_FAILURE;
1092         }
1093
1094         LOG_DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
1095
1096         if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1097         {
1098                 LOG_DEBUG("thumb state, applying fixups");
1099                 context[0] = r0_thumb;
1100                 context[15] = pc_thumb;
1101         } else if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1102         {
1103                 /* adjust value stored by STM */
1104                 context[15] -= 3 * 4;
1105         }
1106
1107         if ((target->debug_reason == DBG_REASON_BREAKPOINT)
1108                         || (target->debug_reason == DBG_REASON_SINGLESTEP)
1109                         || (target->debug_reason == DBG_REASON_WATCHPOINT)
1110                         || (target->debug_reason == DBG_REASON_WPTANDBKPT)
1111                         || ((target->debug_reason == DBG_REASON_DBGRQ) && (arm7_9->use_dbgrq == 0)))
1112                 context[15] -= 3 * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
1113         else if (target->debug_reason == DBG_REASON_DBGRQ)
1114                 context[15] -= arm7_9->dbgreq_adjust_pc * ((armv4_5->core_state == ARMV4_5_STATE_ARM) ? 4 : 2);
1115         else
1116         {
1117                 LOG_ERROR("unknown debug reason: %i", target->debug_reason);
1118         }
1119
1120
1121         for (i=0; i<=15; i++)
1122         {
1123                 LOG_DEBUG("r%i: 0x%8.8x", i, context[i]);
1124                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, context[i]);
1125                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
1126                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
1127         }
1128
1129         LOG_DEBUG("entered debug state at PC 0x%x", context[15]);
1130
1131         /* exceptions other than USR & SYS have a saved program status register */
1132         if ((armv4_5_mode_to_number(armv4_5->core_mode) != ARMV4_5_MODE_USR) && (armv4_5_mode_to_number(armv4_5->core_mode) != ARMV4_5_MODE_SYS))
1133         {
1134                 u32 spsr;
1135                 arm7_9->read_xpsr(target, &spsr, 1);
1136                 jtag_execute_queue();
1137                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, spsr);
1138                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
1139                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
1140         }
1141
1142         /* r0 and r15 (pc) have to be restored later */
1143         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).valid;
1144         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).valid;
1145
1146         if ((retval = jtag_execute_queue()) != ERROR_OK)
1147                 return retval;
1148
1149         if (arm7_9->post_debug_entry)
1150                 arm7_9->post_debug_entry(target);
1151
1152         return ERROR_OK;
1153 }
1154
1155 int arm7_9_full_context(target_t *target)
1156 {
1157         int i;
1158         int retval;
1159         armv4_5_common_t *armv4_5 = target->arch_info;
1160         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1161
1162         LOG_DEBUG("-");
1163
1164         if (target->state != TARGET_HALTED)
1165         {
1166                 LOG_WARNING("target not halted");
1167                 return ERROR_TARGET_NOT_HALTED;
1168         }
1169
1170         /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1171          * SYS shares registers with User, so we don't touch SYS
1172          */
1173         for(i = 0; i < 6; i++)
1174         {
1175                 u32 mask = 0;
1176                 u32* reg_p[16];
1177                 int j;
1178                 int valid = 1;
1179
1180                 /* check if there are invalid registers in the current mode
1181                  */
1182                 for (j = 0; j <= 16; j++)
1183                 {
1184                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1185                                 valid = 0;
1186                 }
1187
1188                 if (!valid)
1189                 {
1190                         u32 tmp_cpsr;
1191
1192                         /* change processor mode (and mask T bit) */
1193                         tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1194                         tmp_cpsr |= armv4_5_number_to_mode(i);
1195                         tmp_cpsr &= ~0x20;
1196                         arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1197
1198                         for (j = 0; j < 15; j++)
1199                         {
1200                                 if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1201                                 {
1202                                         reg_p[j] = (u32*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value;
1203                                         mask |= 1 << j;
1204                                         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
1205                                         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1206                                 }
1207                         }
1208
1209                         /* if only the PSR is invalid, mask is all zeroes */
1210                         if (mask)
1211                                 arm7_9->read_core_regs(target, mask, reg_p);
1212
1213                         /* check if the PSR has to be read */
1214                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid == 0)
1215                         {
1216                                 arm7_9->read_xpsr(target, (u32*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).value, 1);
1217                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
1218                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1219                         }
1220                 }
1221         }
1222
1223         /* restore processor mode (mask T bit) */
1224         arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
1225
1226         if ((retval = jtag_execute_queue()) != ERROR_OK)
1227         {
1228                 LOG_ERROR("JTAG failure");
1229                 exit(-1);
1230         }
1231         return ERROR_OK;
1232 }
1233
1234 int arm7_9_restore_context(target_t *target)
1235 {
1236         armv4_5_common_t *armv4_5 = target->arch_info;
1237         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1238         reg_t *reg;
1239         armv4_5_core_reg_t *reg_arch_info;
1240         enum armv4_5_mode current_mode = armv4_5->core_mode;
1241         int i, j;
1242         int dirty;
1243         int mode_change;
1244
1245         LOG_DEBUG("-");
1246
1247         if (target->state != TARGET_HALTED)
1248         {
1249                 LOG_WARNING("target not halted");
1250                 return ERROR_TARGET_NOT_HALTED;
1251         }
1252
1253         if (arm7_9->pre_restore_context)
1254                 arm7_9->pre_restore_context(target);
1255
1256         /* iterate through processor modes (User, FIQ, IRQ, SVC, ABT, UND)
1257          * SYS shares registers with User, so we don't touch SYS
1258          */
1259         for (i = 0; i < 6; i++)
1260         {
1261                 LOG_DEBUG("examining %s mode", armv4_5_mode_strings[i]);
1262                 dirty = 0;
1263                 mode_change = 0;
1264                 /* check if there are dirty registers in the current mode
1265                 */
1266                 for (j = 0; j <= 16; j++)
1267                 {
1268                         reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
1269                         reg_arch_info = reg->arch_info;
1270                         if (reg->dirty == 1)
1271                         {
1272                                 if (reg->valid == 1)
1273                                 {
1274                                         dirty = 1;
1275                                         LOG_DEBUG("examining dirty reg: %s", reg->name);
1276                                         if ((reg_arch_info->mode != ARMV4_5_MODE_ANY)
1277                                                 && (reg_arch_info->mode != current_mode)
1278                                                 && !((reg_arch_info->mode == ARMV4_5_MODE_USR) && (armv4_5->core_mode == ARMV4_5_MODE_SYS))
1279                                                 && !((reg_arch_info->mode == ARMV4_5_MODE_SYS) && (armv4_5->core_mode == ARMV4_5_MODE_USR)))
1280                                         {
1281                                                 mode_change = 1;
1282                                                 LOG_DEBUG("require mode change");
1283                                         }
1284                                 }
1285                                 else
1286                                 {
1287                                         LOG_ERROR("BUG: dirty register '%s', but no valid data", reg->name);
1288                                 }
1289                         }
1290                 }
1291
1292                 if (dirty)
1293                 {
1294                         u32 mask = 0x0;
1295                         int num_regs = 0;
1296                         u32 regs[16];
1297
1298                         if (mode_change)
1299                         {
1300                                 u32 tmp_cpsr;
1301
1302                                 /* change processor mode (mask T bit) */
1303                                 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1304                                 tmp_cpsr |= armv4_5_number_to_mode(i);
1305                                 tmp_cpsr &= ~0x20;
1306                                 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1307                                 current_mode = armv4_5_number_to_mode(i);
1308                         }
1309
1310                         for (j = 0; j <= 14; j++)
1311                         {
1312                                 reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j);
1313                                 reg_arch_info = reg->arch_info;
1314
1315
1316                                 if (reg->dirty == 1)
1317                                 {
1318                                         regs[j] = buf_get_u32(reg->value, 0, 32);
1319                                         mask |= 1 << j;
1320                                         num_regs++;
1321                                         reg->dirty = 0;
1322                                         reg->valid = 1;
1323                                         LOG_DEBUG("writing register %i of mode %s with value 0x%8.8x", j, armv4_5_mode_strings[i], regs[j]);
1324                                 }
1325                         }
1326
1327                         if (mask)
1328                         {
1329                                 arm7_9->write_core_regs(target, mask, regs);
1330                         }
1331
1332                         reg = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16);
1333                         reg_arch_info = reg->arch_info;
1334                         if ((reg->dirty) && (reg_arch_info->mode != ARMV4_5_MODE_ANY))
1335                         {
1336                                 LOG_DEBUG("writing SPSR of mode %i with value 0x%8.8x", i, buf_get_u32(reg->value, 0, 32));
1337                                 arm7_9->write_xpsr(target, buf_get_u32(reg->value, 0, 32), 1);
1338                         }
1339                 }
1340         }
1341
1342         if ((armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 0) && (armv4_5->core_mode != current_mode))
1343         {
1344                 /* restore processor mode (mask T bit) */
1345                 u32 tmp_cpsr;
1346
1347                 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1348                 tmp_cpsr |= armv4_5_number_to_mode(i);
1349                 tmp_cpsr &= ~0x20;
1350                 LOG_DEBUG("writing lower 8 bit of cpsr with value 0x%2.2x", tmp_cpsr);
1351                 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1352         }
1353         else if (armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty == 1)
1354         {
1355                 /* CPSR has been changed, full restore necessary (mask T bit) */
1356                 LOG_DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1357                 arm7_9->write_xpsr(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32) & ~0x20, 0);
1358                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 0;
1359                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1360         }
1361
1362         /* restore PC */
1363         LOG_DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1364         arm7_9->write_pc(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1365         armv4_5->core_cache->reg_list[15].dirty = 0;
1366
1367         if (arm7_9->post_restore_context)
1368                 arm7_9->post_restore_context(target);
1369
1370         return ERROR_OK;
1371 }
1372
1373 int arm7_9_restart_core(struct target_s *target)
1374 {
1375         armv4_5_common_t *armv4_5 = target->arch_info;
1376         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1377         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
1378
1379         /* set RESTART instruction */
1380         jtag_add_end_state(TAP_RTI);
1381         arm_jtag_set_instr(jtag_info, 0x4, NULL);
1382
1383         jtag_add_runtest(1, TAP_RTI);
1384         if ((jtag_execute_queue()) != ERROR_OK)
1385         {
1386                 exit(-1);
1387         }
1388
1389         return ERROR_OK;
1390 }
1391
1392 void arm7_9_enable_watchpoints(struct target_s *target)
1393 {
1394         watchpoint_t *watchpoint = target->watchpoints;
1395
1396         while (watchpoint)
1397         {
1398                 if (watchpoint->set == 0)
1399                         arm7_9_set_watchpoint(target, watchpoint);
1400                 watchpoint = watchpoint->next;
1401         }
1402 }
1403
1404 void arm7_9_enable_breakpoints(struct target_s *target)
1405 {
1406         breakpoint_t *breakpoint = target->breakpoints;
1407
1408         /* set any pending breakpoints */
1409         while (breakpoint)
1410         {
1411                 if (breakpoint->set == 0)
1412                         arm7_9_set_breakpoint(target, breakpoint);
1413                 breakpoint = breakpoint->next;
1414         }
1415 }
1416
1417 void arm7_9_disable_bkpts_and_wpts(struct target_s *target)
1418 {
1419         breakpoint_t *breakpoint = target->breakpoints;
1420         watchpoint_t *watchpoint = target->watchpoints;
1421
1422         /* set any pending breakpoints */
1423         while (breakpoint)
1424         {
1425                 if (breakpoint->set != 0)
1426                         arm7_9_unset_breakpoint(target, breakpoint);
1427                 breakpoint = breakpoint->next;
1428         }
1429
1430         while (watchpoint)
1431         {
1432                 if (watchpoint->set != 0)
1433                         arm7_9_unset_watchpoint(target, watchpoint);
1434                 watchpoint = watchpoint->next;
1435         }
1436 }
1437
1438 int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
1439 {
1440         armv4_5_common_t *armv4_5 = target->arch_info;
1441         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1442         breakpoint_t *breakpoint = target->breakpoints;
1443         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1444         int err;
1445
1446         LOG_DEBUG("-");
1447
1448         if (target->state != TARGET_HALTED)
1449         {
1450                 LOG_WARNING("target not halted");
1451                 return ERROR_TARGET_NOT_HALTED;
1452         }
1453
1454         if (!debug_execution)
1455         {
1456                 target_free_all_working_areas(target);
1457         }
1458
1459         /* current = 1: continue on current pc, otherwise continue at <address> */
1460         if (!current)
1461                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1462
1463         /* the front-end may request us not to handle breakpoints */
1464         if (handle_breakpoints)
1465         {
1466                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1467                 {
1468                         LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
1469                         arm7_9_unset_breakpoint(target, breakpoint);
1470
1471                         LOG_DEBUG("enable single-step");
1472                         arm7_9->enable_single_step(target);
1473
1474                         target->debug_reason = DBG_REASON_SINGLESTEP;
1475
1476                         arm7_9_restore_context(target);
1477
1478                         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1479                                 arm7_9->branch_resume(target);
1480                         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1481                         {
1482                                 arm7_9->branch_resume_thumb(target);
1483                         }
1484                         else
1485                         {
1486                                 LOG_ERROR("unhandled core state");
1487                                 exit(-1);
1488                         }
1489
1490                         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1491                         embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1492                         err = arm7_9_execute_sys_speed(target);
1493
1494                         LOG_DEBUG("disable single-step");
1495                         arm7_9->disable_single_step(target);
1496
1497                         if (err != ERROR_OK)
1498                         {
1499                                 arm7_9_set_breakpoint(target, breakpoint);
1500                                 target->state = TARGET_UNKNOWN;
1501                                 return err;
1502                         }
1503
1504                         arm7_9_debug_entry(target);
1505                         LOG_DEBUG("new PC after step: 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1506
1507                         LOG_DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
1508                         arm7_9_set_breakpoint(target, breakpoint);
1509                 }
1510         }
1511
1512         /* enable any pending breakpoints and watchpoints */
1513         arm7_9_enable_breakpoints(target);
1514         arm7_9_enable_watchpoints(target);
1515
1516         arm7_9_restore_context(target);
1517
1518         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1519         {
1520                 arm7_9->branch_resume(target);
1521         }
1522         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1523         {
1524                 arm7_9->branch_resume_thumb(target);
1525         }
1526         else
1527         {
1528                 LOG_ERROR("unhandled core state");
1529                 exit(-1);
1530         }
1531
1532         /* deassert DBGACK and INTDIS */
1533         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1534         /* INTDIS only when we really resume, not during debug execution */
1535         if (!debug_execution)
1536                 buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_INTDIS, 1, 0);
1537         embeddedice_write_reg(dbg_ctrl, buf_get_u32(dbg_ctrl->value, 0, dbg_ctrl->size));
1538
1539         arm7_9_restart_core(target);
1540
1541         target->debug_reason = DBG_REASON_NOTHALTED;
1542
1543         if (!debug_execution)
1544         {
1545                 /* registers are now invalid */
1546                 armv4_5_invalidate_core_regs(target);
1547                 target->state = TARGET_RUNNING;
1548                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1549         }
1550         else
1551         {
1552                 target->state = TARGET_DEBUG_RUNNING;
1553                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1554         }
1555
1556         LOG_DEBUG("target resumed");
1557
1558         return ERROR_OK;
1559 }
1560
1561 void arm7_9_enable_eice_step(target_t *target)
1562 {
1563         armv4_5_common_t *armv4_5 = target->arch_info;
1564         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1565
1566         /* setup an inverse breakpoint on the current PC
1567         * - comparator 1 matches the current address
1568         * - rangeout from comparator 1 is connected to comparator 0 rangein
1569         * - comparator 0 matches any address, as long as rangein is low */
1570         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff);
1571         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
1572         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x100);
1573         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0x77);
1574         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1575         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0);
1576         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff);
1577         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
1578         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], 0xf7);
1579 }
1580
1581 void arm7_9_disable_eice_step(target_t *target)
1582 {
1583         armv4_5_common_t *armv4_5 = target->arch_info;
1584         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1585
1586         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
1587         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
1588         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
1589         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
1590         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE]);
1591         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK]);
1592         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK]);
1593         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK]);
1594         embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE]);
1595 }
1596
1597 int arm7_9_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
1598 {
1599         armv4_5_common_t *armv4_5 = target->arch_info;
1600         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1601         breakpoint_t *breakpoint = NULL;
1602         int err;
1603
1604         if (target->state != TARGET_HALTED)
1605         {
1606                 LOG_WARNING("target not halted");
1607                 return ERROR_TARGET_NOT_HALTED;
1608         }
1609
1610         /* current = 1: continue on current pc, otherwise continue at <address> */
1611         if (!current)
1612                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1613
1614         /* the front-end may request us not to handle breakpoints */
1615         if (handle_breakpoints)
1616                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1617                         arm7_9_unset_breakpoint(target, breakpoint);
1618
1619         target->debug_reason = DBG_REASON_SINGLESTEP;
1620
1621         arm7_9_restore_context(target);
1622
1623         arm7_9->enable_single_step(target);
1624
1625         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
1626         {
1627                 arm7_9->branch_resume(target);
1628         }
1629         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
1630         {
1631                 arm7_9->branch_resume_thumb(target);
1632         }
1633         else
1634         {
1635                 LOG_ERROR("unhandled core state");
1636                 exit(-1);
1637         }
1638
1639         target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1640
1641         err = arm7_9_execute_sys_speed(target);
1642         arm7_9->disable_single_step(target);
1643
1644         /* registers are now invalid */
1645         armv4_5_invalidate_core_regs(target);
1646
1647         if (err != ERROR_OK)
1648         {
1649                 target->state = TARGET_UNKNOWN;
1650         } else {
1651                 arm7_9_debug_entry(target);
1652                 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1653                 LOG_DEBUG("target stepped");
1654         }
1655
1656         if (breakpoint)
1657                 arm7_9_set_breakpoint(target, breakpoint);
1658
1659         return err;
1660
1661 }
1662
1663 int arm7_9_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
1664 {
1665         u32* reg_p[16];
1666         u32 value;
1667         int retval;
1668         armv4_5_common_t *armv4_5 = target->arch_info;
1669         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1670         enum armv4_5_mode reg_mode = ((armv4_5_core_reg_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
1671
1672         if ((num < 0) || (num > 16))
1673                 return ERROR_INVALID_ARGUMENTS;
1674
1675         if ((mode != ARMV4_5_MODE_ANY)
1676                         && (mode != armv4_5->core_mode)
1677                         && (reg_mode != ARMV4_5_MODE_ANY))
1678         {
1679                 u32 tmp_cpsr;
1680
1681                 /* change processor mode (mask T bit) */
1682                 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1683                 tmp_cpsr |= mode;
1684                 tmp_cpsr &= ~0x20;
1685                 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1686         }
1687
1688         if ((num >= 0) && (num <= 15))
1689         {
1690                 /* read a normal core register */
1691                 reg_p[num] = &value;
1692
1693                 arm7_9->read_core_regs(target, 1 << num, reg_p);
1694         }
1695         else
1696         {
1697                 /* read a program status register
1698                  * if the register mode is MODE_ANY, we read the cpsr, otherwise a spsr
1699                  */
1700                 armv4_5_core_reg_t *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
1701                 int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
1702
1703                 arm7_9->read_xpsr(target, &value, spsr);
1704         }
1705
1706         if ((retval = jtag_execute_queue()) != ERROR_OK)
1707         {
1708                 LOG_ERROR("JTAG failure");
1709                 exit(-1);
1710         }
1711
1712         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
1713         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
1714         buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).value, 0, 32, value);
1715
1716         if ((mode != ARMV4_5_MODE_ANY)
1717                         && (mode != armv4_5->core_mode)
1718                         && (reg_mode != ARMV4_5_MODE_ANY))      {
1719                 /* restore processor mode (mask T bit) */
1720                 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
1721         }
1722
1723         return ERROR_OK;
1724
1725 }
1726
1727 int arm7_9_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
1728 {
1729         u32 reg[16];
1730         armv4_5_common_t *armv4_5 = target->arch_info;
1731         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1732         enum armv4_5_mode reg_mode = ((armv4_5_core_reg_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
1733
1734         if ((num < 0) || (num > 16))
1735                 return ERROR_INVALID_ARGUMENTS;
1736
1737         if ((mode != ARMV4_5_MODE_ANY)
1738                         && (mode != armv4_5->core_mode)
1739                         && (reg_mode != ARMV4_5_MODE_ANY))      {
1740                 u32 tmp_cpsr;
1741
1742                 /* change processor mode (mask T bit) */
1743                 tmp_cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & 0xE0;
1744                 tmp_cpsr |= mode;
1745                 tmp_cpsr &= ~0x20;
1746                 arm7_9->write_xpsr_im8(target, tmp_cpsr & 0xff, 0, 0);
1747         }
1748
1749         if ((num >= 0) && (num <= 15))
1750         {
1751                 /* write a normal core register */
1752                 reg[num] = value;
1753
1754                 arm7_9->write_core_regs(target, 1 << num, reg);
1755         }
1756         else
1757         {
1758                 /* write a program status register
1759                 * if the register mode is MODE_ANY, we write the cpsr, otherwise a spsr
1760                 */
1761                 armv4_5_core_reg_t *arch_info = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info;
1762                 int spsr = (arch_info->mode == ARMV4_5_MODE_ANY) ? 0 : 1;
1763
1764                 /* if we're writing the CPSR, mask the T bit */
1765                 if (!spsr)
1766                         value &= ~0x20;
1767
1768                 arm7_9->write_xpsr(target, value, spsr);
1769         }
1770
1771         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
1772         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
1773
1774         if ((mode != ARMV4_5_MODE_ANY)
1775                         && (mode != armv4_5->core_mode)
1776                         && (reg_mode != ARMV4_5_MODE_ANY))      {
1777                 /* restore processor mode (mask T bit) */
1778                 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
1779         }
1780
1781         return jtag_execute_queue();
1782 }
1783
1784 int arm7_9_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1785 {
1786         armv4_5_common_t *armv4_5 = target->arch_info;
1787         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1788
1789         u32 reg[16];
1790         int num_accesses = 0;
1791         int thisrun_accesses;
1792         int i;
1793         u32 cpsr;
1794         int retval;
1795         int last_reg = 0;
1796
1797         LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
1798
1799         if (target->state != TARGET_HALTED)
1800         {
1801                 LOG_WARNING("target not halted");
1802                 return ERROR_TARGET_NOT_HALTED;
1803         }
1804
1805         /* sanitize arguments */
1806         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1807                 return ERROR_INVALID_ARGUMENTS;
1808
1809         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1810                 return ERROR_TARGET_UNALIGNED_ACCESS;
1811
1812         /* load the base register with the address of the first word */
1813         reg[0] = address;
1814         arm7_9->write_core_regs(target, 0x1, reg);
1815
1816         switch (size)
1817         {
1818                 case 4:
1819                         while (num_accesses < count)
1820                         {
1821                                 u32 reg_list;
1822                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
1823                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
1824
1825                                 if (last_reg <= thisrun_accesses)
1826                                         last_reg = thisrun_accesses;
1827
1828                                 arm7_9->load_word_regs(target, reg_list);
1829
1830                                 /* fast memory reads are only safe when the target is running
1831                                  * from a sufficiently high clock (32 kHz is usually too slow)
1832                                  */
1833                                 if (arm7_9->fast_memory_access)
1834                                         arm7_9_execute_fast_sys_speed(target);
1835                                 else
1836                                         arm7_9_execute_sys_speed(target);
1837
1838                                 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 4);
1839
1840                                 /* advance buffer, count number of accesses */
1841                                 buffer += thisrun_accesses * 4;
1842                                 num_accesses += thisrun_accesses;
1843                         }
1844                         break;
1845                 case 2:
1846                         while (num_accesses < count)
1847                         {
1848                                 u32 reg_list;
1849                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
1850                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
1851
1852                                 for (i = 1; i <= thisrun_accesses; i++)
1853                                 {
1854                                         if (i > last_reg)
1855                                                 last_reg = i;
1856                                         arm7_9->load_hword_reg(target, i);
1857                                         /* fast memory reads are only safe when the target is running
1858                                          * from a sufficiently high clock (32 kHz is usually too slow)
1859                                          */
1860                                         if (arm7_9->fast_memory_access)
1861                                                 arm7_9_execute_fast_sys_speed(target);
1862                                         else
1863                                                 arm7_9_execute_sys_speed(target);
1864                                 }
1865
1866                                 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 2);
1867
1868                                 /* advance buffer, count number of accesses */
1869                                 buffer += thisrun_accesses * 2;
1870                                 num_accesses += thisrun_accesses;
1871                         }
1872                         break;
1873                 case 1:
1874                         while (num_accesses < count)
1875                         {
1876                                 u32 reg_list;
1877                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
1878                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
1879
1880                                 for (i = 1; i <= thisrun_accesses; i++)
1881                                 {
1882                                         if (i > last_reg)
1883                                                 last_reg = i;
1884                                         arm7_9->load_byte_reg(target, i);
1885                                         /* fast memory reads are only safe when the target is running
1886                                          * from a sufficiently high clock (32 kHz is usually too slow)
1887                                          */
1888                                         if (arm7_9->fast_memory_access)
1889                                                 arm7_9_execute_fast_sys_speed(target);
1890                                         else
1891                                                 arm7_9_execute_sys_speed(target);
1892                                 }
1893
1894                                 arm7_9->read_core_regs_target_buffer(target, reg_list, buffer, 1);
1895
1896                                 /* advance buffer, count number of accesses */
1897                                 buffer += thisrun_accesses * 1;
1898                                 num_accesses += thisrun_accesses;
1899                         }
1900                         break;
1901                 default:
1902                         LOG_ERROR("BUG: we shouldn't get here");
1903                         exit(-1);
1904                         break;
1905         }
1906
1907         for (i=0; i<=last_reg; i++)
1908                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
1909
1910         arm7_9->read_xpsr(target, &cpsr, 0);
1911         if ((retval = jtag_execute_queue()) != ERROR_OK)
1912         {
1913                 LOG_ERROR("JTAG error while reading cpsr");
1914                 return ERROR_TARGET_DATA_ABORT;
1915         }
1916
1917         if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
1918         {
1919                 LOG_WARNING("memory read caused data abort (address: 0x%8.8x, size: 0x%x, count: 0x%x)", address, size, count);
1920
1921                 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
1922
1923                 return ERROR_TARGET_DATA_ABORT;
1924         }
1925
1926         return ERROR_OK;
1927 }
1928
1929 int arm7_9_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1930 {
1931         armv4_5_common_t *armv4_5 = target->arch_info;
1932         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
1933         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
1934
1935         u32 reg[16];
1936         int num_accesses = 0;
1937         int thisrun_accesses;
1938         int i;
1939         u32 cpsr;
1940         int retval;
1941         int last_reg = 0;
1942
1943 #ifdef _DEBUG_ARM7_9_
1944         LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
1945 #endif
1946
1947         if (target->state != TARGET_HALTED)
1948         {
1949                 LOG_WARNING("target not halted");
1950                 return ERROR_TARGET_NOT_HALTED;
1951         }
1952
1953         /* sanitize arguments */
1954         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1955                 return ERROR_INVALID_ARGUMENTS;
1956
1957         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1958                 return ERROR_TARGET_UNALIGNED_ACCESS;
1959
1960         /* load the base register with the address of the first word */
1961         reg[0] = address;
1962         arm7_9->write_core_regs(target, 0x1, reg);
1963
1964         /* Clear DBGACK, to make sure memory fetches work as expected */
1965         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 0);
1966         embeddedice_store_reg(dbg_ctrl);
1967
1968         switch (size)
1969         {
1970                 case 4:
1971                         while (num_accesses < count)
1972                         {
1973                                 u32 reg_list;
1974                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
1975                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
1976
1977                                 for (i = 1; i <= thisrun_accesses; i++)
1978                                 {
1979                                         if (i > last_reg)
1980                                                 last_reg = i;
1981                                         reg[i] = target_buffer_get_u32(target, buffer);
1982                                         buffer += 4;
1983                                 }
1984
1985                                 arm7_9->write_core_regs(target, reg_list, reg);
1986
1987                                 arm7_9->store_word_regs(target, reg_list);
1988
1989                                 /* fast memory writes are only safe when the target is running
1990                                  * from a sufficiently high clock (32 kHz is usually too slow)
1991                                  */
1992                                 if (arm7_9->fast_memory_access)
1993                                         arm7_9_execute_fast_sys_speed(target);
1994                                 else
1995                                         arm7_9_execute_sys_speed(target);
1996
1997                                 num_accesses += thisrun_accesses;
1998                         }
1999                         break;
2000                 case 2:
2001                         while (num_accesses < count)
2002                         {
2003                                 u32 reg_list;
2004                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2005                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2006
2007                                 for (i = 1; i <= thisrun_accesses; i++)
2008                                 {
2009                                         if (i > last_reg)
2010                                                 last_reg = i;
2011                                         reg[i] = target_buffer_get_u16(target, buffer) & 0xffff;
2012                                         buffer += 2;
2013                                 }
2014
2015                                 arm7_9->write_core_regs(target, reg_list, reg);
2016
2017                                 for (i = 1; i <= thisrun_accesses; i++)
2018                                 {
2019                                         arm7_9->store_hword_reg(target, i);
2020
2021                                         /* fast memory writes are only safe when the target is running
2022                                          * from a sufficiently high clock (32 kHz is usually too slow)
2023                                          */
2024                                         if (arm7_9->fast_memory_access)
2025                                                 arm7_9_execute_fast_sys_speed(target);
2026                                         else
2027                                                 arm7_9_execute_sys_speed(target);
2028                                 }
2029
2030                                 num_accesses += thisrun_accesses;
2031                         }
2032                         break;
2033                 case 1:
2034                         while (num_accesses < count)
2035                         {
2036                                 u32 reg_list;
2037                                 thisrun_accesses = ((count - num_accesses) >= 14) ? 14 : (count - num_accesses);
2038                                 reg_list = (0xffff >> (15 - thisrun_accesses)) & 0xfffe;
2039
2040                                 for (i = 1; i <= thisrun_accesses; i++)
2041                                 {
2042                                         if (i > last_reg)
2043                                                 last_reg = i;
2044                                         reg[i] = *buffer++ & 0xff;
2045                                 }
2046
2047                                 arm7_9->write_core_regs(target, reg_list, reg);
2048
2049                                 for (i = 1; i <= thisrun_accesses; i++)
2050                                 {
2051                                         arm7_9->store_byte_reg(target, i);
2052                                         /* fast memory writes are only safe when the target is running
2053                                          * from a sufficiently high clock (32 kHz is usually too slow)
2054                                          */
2055                                         if (arm7_9->fast_memory_access)
2056                                                 arm7_9_execute_fast_sys_speed(target);
2057                                         else
2058                                                 arm7_9_execute_sys_speed(target);
2059                                 }
2060
2061                                 num_accesses += thisrun_accesses;
2062                         }
2063                         break;
2064                 default:
2065                         LOG_ERROR("BUG: we shouldn't get here");
2066                         exit(-1);
2067                         break;
2068         }
2069
2070         /* Re-Set DBGACK */
2071         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_DBGACK, 1, 1);
2072         embeddedice_store_reg(dbg_ctrl);
2073
2074         for (i=0; i<=last_reg; i++)
2075                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid;
2076
2077         arm7_9->read_xpsr(target, &cpsr, 0);
2078         if ((retval = jtag_execute_queue()) != ERROR_OK)
2079         {
2080                 LOG_ERROR("JTAG error while reading cpsr");
2081                 return ERROR_TARGET_DATA_ABORT;
2082         }
2083
2084         if (((cpsr & 0x1f) == ARMV4_5_MODE_ABT) && (armv4_5->core_mode != ARMV4_5_MODE_ABT))
2085         {
2086                 LOG_WARNING("memory write caused data abort (address: 0x%8.8x, size: 0x%x, count: 0x%x)", address, size, count);
2087
2088                 arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
2089
2090                 return ERROR_TARGET_DATA_ABORT;
2091         }
2092
2093         return ERROR_OK;
2094 }
2095
2096 int arm7_9_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
2097 {
2098         armv4_5_common_t *armv4_5 = target->arch_info;
2099         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
2100         enum armv4_5_state core_state = armv4_5->core_state;
2101         u32 r0 = buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32);
2102         u32 r1 = buf_get_u32(armv4_5->core_cache->reg_list[1].value, 0, 32);
2103         u32 pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
2104         int i;
2105
2106         u32 dcc_code[] =
2107         {
2108                 /* MRC      TST         BNE         MRC         STR         B */
2109                 0xee101e10, 0xe3110001, 0x0afffffc, 0xee111e10, 0xe4801004, 0xeafffff9
2110         };
2111
2112         if (!arm7_9->dcc_downloads)
2113                 return target->type->write_memory(target, address, 4, count, buffer);
2114
2115         /* regrab previously allocated working_area, or allocate a new one */
2116         if (!arm7_9->dcc_working_area)
2117         {
2118                 u8 dcc_code_buf[6 * 4];
2119
2120                 /* make sure we have a working area */
2121                 if (target_alloc_working_area(target, 24, &arm7_9->dcc_working_area) != ERROR_OK)
2122                 {
2123                         LOG_INFO("no working area available, falling back to memory writes");
2124                         return target->type->write_memory(target, address, 4, count, buffer);
2125                 }
2126
2127                 /* copy target instructions to target endianness */
2128                 for (i = 0; i < 6; i++)
2129                 {
2130                         target_buffer_set_u32(target, dcc_code_buf + i*4, dcc_code[i]);
2131                 }
2132
2133                 /* write DCC code to working area */
2134                 target->type->write_memory(target, arm7_9->dcc_working_area->address, 4, 6, dcc_code_buf);
2135         }
2136
2137         buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, address);
2138         armv4_5->core_cache->reg_list[0].valid = 1;
2139         armv4_5->core_cache->reg_list[0].dirty = 1;
2140         armv4_5->core_state = ARMV4_5_STATE_ARM;
2141
2142         arm7_9_resume(target, 0, arm7_9->dcc_working_area->address, 1, 1);
2143
2144         int little=target->endianness==TARGET_LITTLE_ENDIAN;
2145         if (count>2)
2146         {
2147                 /* Handle first & last using standard embeddedice_write_reg and the middle ones w/the
2148                    core function repeated.
2149                  */
2150                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2151                 buffer+=4;
2152
2153                 embeddedice_reg_t *ice_reg = arm7_9->eice_cache->reg_list[EICE_COMMS_DATA].arch_info;
2154                 u8 reg_addr = ice_reg->addr & 0x1f;
2155                 int chain_pos = ice_reg->jtag_info->chain_pos;
2156                 /* we want the compiler to duplicate the code, which it does not
2157                  * do automatically.
2158                  */
2159                 if (little)
2160                 {
2161                         for (i = 1; i < count - 1; i++)
2162                         {
2163                                 embeddedice_write_reg_inner(chain_pos, reg_addr, fast_target_buffer_get_u32(buffer, little));
2164                                 buffer += 4;
2165                         }
2166                 } else
2167                 {
2168                         for (i = 1; i < count - 1; i++)
2169                         {
2170                                 embeddedice_write_reg_inner(chain_pos, reg_addr, fast_target_buffer_get_u32(buffer, little));
2171                                 buffer += 4;
2172                         }
2173                 }
2174                 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2175         } else
2176         {
2177                 for (i = 0; i < count; i++)
2178                 {
2179                         embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], fast_target_buffer_get_u32(buffer, little));
2180                         buffer += 4;
2181                 }
2182         }
2183
2184         target->type->halt(target);
2185
2186         for (i=0; i<100; i++)
2187         {
2188                 target->type->poll(target);
2189                 if (target->state == TARGET_HALTED)
2190                         break;
2191                 usleep(1000); /* sleep 1ms */
2192         }
2193         if (i == 100)
2194         {
2195                 LOG_ERROR("bulk write timed out, target not halted");
2196                 return ERROR_TARGET_TIMEOUT;
2197         }
2198
2199         /* restore target state */
2200         buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, r0);
2201         armv4_5->core_cache->reg_list[0].valid = 1;
2202         armv4_5->core_cache->reg_list[0].dirty = 1;
2203         buf_set_u32(armv4_5->core_cache->reg_list[1].value, 0, 32, r1);
2204         armv4_5->core_cache->reg_list[1].valid = 1;
2205         armv4_5->core_cache->reg_list[1].dirty = 1;
2206         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc);
2207         armv4_5->core_cache->reg_list[15].valid = 1;
2208         armv4_5->core_cache->reg_list[15].dirty = 1;
2209         armv4_5->core_state = core_state;
2210
2211         return ERROR_OK;
2212 }
2213
2214 int arm7_9_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum)
2215 {
2216         working_area_t *crc_algorithm;
2217         armv4_5_algorithm_t armv4_5_info;
2218         reg_param_t reg_params[2];
2219         int retval;
2220
2221         u32 arm7_9_crc_code[] = {
2222                 0xE1A02000,                             /* mov          r2, r0 */
2223                 0xE3E00000,                             /* mov          r0, #0xffffffff */
2224                 0xE1A03001,                             /* mov          r3, r1 */
2225                 0xE3A04000,                             /* mov          r4, #0 */
2226                 0xEA00000B,                             /* b            ncomp */
2227                                                                 /* nbyte: */
2228                 0xE7D21004,                             /* ldrb r1, [r2, r4] */
2229                 0xE59F7030,                             /* ldr          r7, CRC32XOR */
2230                 0xE0200C01,                             /* eor          r0, r0, r1, asl 24 */
2231                 0xE3A05000,                             /* mov          r5, #0 */
2232                                                                 /* loop: */
2233                 0xE3500000,                             /* cmp          r0, #0 */
2234                 0xE1A06080,                             /* mov          r6, r0, asl #1 */
2235                 0xE2855001,                             /* add          r5, r5, #1 */
2236                 0xE1A00006,                             /* mov          r0, r6 */
2237                 0xB0260007,                             /* eorlt        r0, r6, r7 */
2238                 0xE3550008,                             /* cmp          r5, #8 */
2239                 0x1AFFFFF8,                             /* bne          loop */
2240                 0xE2844001,                             /* add          r4, r4, #1 */
2241                                                                 /* ncomp: */
2242                 0xE1540003,                             /* cmp          r4, r3 */
2243                 0x1AFFFFF1,                             /* bne          nbyte */
2244                                                                 /* end: */
2245                 0xEAFFFFFE,                             /* b            end */
2246                 0x04C11DB7                              /* CRC32XOR:    .word 0x04C11DB7 */
2247         };
2248
2249         int i;
2250
2251         if (target_alloc_working_area(target, sizeof(arm7_9_crc_code), &crc_algorithm) != ERROR_OK)
2252         {
2253                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2254         }
2255
2256         /* convert flash writing code into a buffer in target endianness */
2257         for (i = 0; i < (sizeof(arm7_9_crc_code)/sizeof(u32)); i++)
2258                 target_write_u32(target, crc_algorithm->address + i*sizeof(u32), arm7_9_crc_code[i]);
2259
2260         armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
2261         armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
2262         armv4_5_info.core_state = ARMV4_5_STATE_ARM;
2263
2264         init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT);
2265         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
2266
2267         buf_set_u32(reg_params[0].value, 0, 32, address);
2268         buf_set_u32(reg_params[1].value, 0, 32, count);
2269
2270         if ((retval = target->type->run_algorithm(target, 0, NULL, 2, reg_params,
2271                 crc_algorithm->address, crc_algorithm->address + (sizeof(arm7_9_crc_code) - 8), 20000, &armv4_5_info)) != ERROR_OK)
2272         {
2273                 LOG_ERROR("error executing arm7_9 crc algorithm");
2274                 destroy_reg_param(&reg_params[0]);
2275                 destroy_reg_param(&reg_params[1]);
2276                 target_free_working_area(target, crc_algorithm);
2277                 return retval;
2278         }
2279
2280         *checksum = buf_get_u32(reg_params[0].value, 0, 32);
2281
2282         destroy_reg_param(&reg_params[0]);
2283         destroy_reg_param(&reg_params[1]);
2284
2285         target_free_working_area(target, crc_algorithm);
2286
2287         return ERROR_OK;
2288 }
2289
2290 int arm7_9_register_commands(struct command_context_s *cmd_ctx)
2291 {
2292         command_t *arm7_9_cmd;
2293
2294         arm7_9_cmd = register_command(cmd_ctx, NULL, "arm7_9", NULL, COMMAND_ANY, "arm7/9 specific commands");
2295
2296         register_command(cmd_ctx, arm7_9_cmd, "write_xpsr", handle_arm7_9_write_xpsr_command, COMMAND_EXEC, "write program status register <value> <not cpsr|spsr>");
2297         register_command(cmd_ctx, arm7_9_cmd, "write_xpsr_im8", handle_arm7_9_write_xpsr_im8_command, COMMAND_EXEC, "write program status register <8bit immediate> <rotate> <not cpsr|spsr>");
2298
2299         register_command(cmd_ctx, arm7_9_cmd, "write_core_reg", handle_arm7_9_write_core_reg_command, COMMAND_EXEC, "write core register <num> <mode> <value>");
2300
2301         register_command(cmd_ctx, arm7_9_cmd, "sw_bkpts", handle_arm7_9_sw_bkpts_command, COMMAND_EXEC, "support for software breakpoints <enable|disable>");
2302         register_command(cmd_ctx, arm7_9_cmd, "force_hw_bkpts", handle_arm7_9_force_hw_bkpts_command, COMMAND_EXEC, "use hardware breakpoints for all breakpoints (disables sw breakpoint support) <enable|disable>");
2303         register_command(cmd_ctx, arm7_9_cmd, "dbgrq", handle_arm7_9_dbgrq_command,
2304                 COMMAND_ANY, "use EmbeddedICE dbgrq instead of breakpoint for target halt requests <enable|disable>");
2305         register_command(cmd_ctx, arm7_9_cmd, "fast_writes", handle_arm7_9_fast_memory_access_command,
2306                  COMMAND_ANY, "(deprecated, see: arm7_9 fast_memory_access)");
2307         register_command(cmd_ctx, arm7_9_cmd, "fast_memory_access", handle_arm7_9_fast_memory_access_command,
2308                  COMMAND_ANY, "use fast memory accesses instead of slower but potentially unsafe slow accesses <enable|disable>");
2309         register_command(cmd_ctx, arm7_9_cmd, "dcc_downloads", handle_arm7_9_dcc_downloads_command,
2310                 COMMAND_ANY, "use DCC downloads for larger memory writes <enable|disable>");
2311
2312         armv4_5_register_commands(cmd_ctx);
2313
2314         etm_register_commands(cmd_ctx);
2315
2316         return ERROR_OK;
2317 }
2318
2319 int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2320 {
2321         u32 value;
2322         int spsr;
2323         int retval;
2324         target_t *target = get_current_target(cmd_ctx);
2325         armv4_5_common_t *armv4_5;
2326         arm7_9_common_t *arm7_9;
2327
2328         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2329         {
2330                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2331                 return ERROR_OK;
2332         }
2333
2334         if (target->state != TARGET_HALTED)
2335         {
2336                 command_print(cmd_ctx, "can't write registers while running");
2337                 return ERROR_OK;
2338         }
2339
2340         if (argc < 2)
2341         {
2342                 command_print(cmd_ctx, "usage: write_xpsr <value> <not cpsr|spsr>");
2343                 return ERROR_OK;
2344         }
2345
2346         value = strtoul(args[0], NULL, 0);
2347         spsr = strtol(args[1], NULL, 0);
2348
2349         /* if we're writing the CPSR, mask the T bit */
2350         if (!spsr)
2351                 value &= ~0x20;
2352
2353         arm7_9->write_xpsr(target, value, spsr);
2354         if ((retval = jtag_execute_queue()) != ERROR_OK)
2355         {
2356                 LOG_ERROR("JTAG error while writing to xpsr");
2357                 return retval;
2358         }
2359
2360         return ERROR_OK;
2361 }
2362
2363 int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2364 {
2365         u32 value;
2366         int rotate;
2367         int spsr;
2368         int retval;
2369         target_t *target = get_current_target(cmd_ctx);
2370         armv4_5_common_t *armv4_5;
2371         arm7_9_common_t *arm7_9;
2372
2373         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2374         {
2375                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2376                 return ERROR_OK;
2377         }
2378
2379         if (target->state != TARGET_HALTED)
2380         {
2381                 command_print(cmd_ctx, "can't write registers while running");
2382                 return ERROR_OK;
2383         }
2384
2385         if (argc < 3)
2386         {
2387                 command_print(cmd_ctx, "usage: write_xpsr_im8 <im8> <rotate> <not cpsr|spsr>");
2388                 return ERROR_OK;
2389         }
2390
2391         value = strtoul(args[0], NULL, 0);
2392         rotate = strtol(args[1], NULL, 0);
2393         spsr = strtol(args[2], NULL, 0);
2394
2395         arm7_9->write_xpsr_im8(target, value, rotate, spsr);
2396         if ((retval = jtag_execute_queue()) != ERROR_OK)
2397         {
2398                 LOG_ERROR("JTAG error while writing 8-bit immediate to xpsr");
2399                 return retval;
2400         }
2401
2402         return ERROR_OK;
2403 }
2404
2405 int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2406 {
2407         u32 value;
2408         u32 mode;
2409         int num;
2410         target_t *target = get_current_target(cmd_ctx);
2411         armv4_5_common_t *armv4_5;
2412         arm7_9_common_t *arm7_9;
2413
2414         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2415         {
2416                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2417                 return ERROR_OK;
2418         }
2419
2420         if (target->state != TARGET_HALTED)
2421         {
2422                 command_print(cmd_ctx, "can't write registers while running");
2423                 return ERROR_OK;
2424         }
2425
2426         if (argc < 3)
2427         {
2428                 command_print(cmd_ctx, "usage: write_core_reg <num> <mode> <value>");
2429                 return ERROR_OK;
2430         }
2431
2432         num = strtol(args[0], NULL, 0);
2433         mode = strtoul(args[1], NULL, 0);
2434         value = strtoul(args[2], NULL, 0);
2435
2436         arm7_9_write_core_reg(target, num, mode, value);
2437
2438         return ERROR_OK;
2439 }
2440
2441 int handle_arm7_9_sw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2442 {
2443         target_t *target = get_current_target(cmd_ctx);
2444         armv4_5_common_t *armv4_5;
2445         arm7_9_common_t *arm7_9;
2446
2447         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2448         {
2449                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2450                 return ERROR_OK;
2451         }
2452
2453         if (argc == 0)
2454         {
2455                 command_print(cmd_ctx, "software breakpoints %s", (arm7_9->sw_bkpts_enabled) ? "enabled" : "disabled");
2456                 return ERROR_OK;
2457         }
2458
2459         if (strcmp("enable", args[0]) == 0)
2460         {
2461                 if (arm7_9->sw_bkpts_use_wp)
2462                 {
2463                         arm7_9_enable_sw_bkpts(target);
2464                 }
2465                 else
2466                 {
2467                         arm7_9->sw_bkpts_enabled = 1;
2468                 }
2469         }
2470         else if (strcmp("disable", args[0]) == 0)
2471         {
2472                 if (arm7_9->sw_bkpts_use_wp)
2473                 {
2474                         arm7_9_disable_sw_bkpts(target);
2475                 }
2476                 else
2477                 {
2478                         arm7_9->sw_bkpts_enabled = 0;
2479                 }
2480         }
2481         else
2482         {
2483                 command_print(cmd_ctx, "usage: arm7_9 sw_bkpts <enable|disable>");
2484         }
2485
2486         command_print(cmd_ctx, "software breakpoints %s", (arm7_9->sw_bkpts_enabled) ? "enabled" : "disabled");
2487
2488         return ERROR_OK;
2489 }
2490
2491 int handle_arm7_9_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2492 {
2493         target_t *target = get_current_target(cmd_ctx);
2494         armv4_5_common_t *armv4_5;
2495         arm7_9_common_t *arm7_9;
2496
2497         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2498         {
2499                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2500                 return ERROR_OK;
2501         }
2502
2503         if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
2504         {
2505                 arm7_9->force_hw_bkpts = 1;
2506                 if (arm7_9->sw_bkpts_use_wp)
2507                 {
2508                         arm7_9_disable_sw_bkpts(target);
2509                 }
2510         }
2511         else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
2512         {
2513                 arm7_9->force_hw_bkpts = 0;
2514         }
2515         else
2516         {
2517                 command_print(cmd_ctx, "usage: arm7_9 force_hw_bkpts <enable|disable>");
2518         }
2519
2520         command_print(cmd_ctx, "force hardware breakpoints %s", (arm7_9->force_hw_bkpts) ? "enabled" : "disabled");
2521
2522         return ERROR_OK;
2523 }
2524
2525 int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2526 {
2527         target_t *target = get_current_target(cmd_ctx);
2528         armv4_5_common_t *armv4_5;
2529         arm7_9_common_t *arm7_9;
2530
2531         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2532         {
2533                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2534                 return ERROR_OK;
2535         }
2536
2537         if (argc > 0)
2538         {
2539                 if (strcmp("enable", args[0]) == 0)
2540                 {
2541                         arm7_9->use_dbgrq = 1;
2542                 }
2543                 else if (strcmp("disable", args[0]) == 0)
2544                 {
2545                         arm7_9->use_dbgrq = 0;
2546                 }
2547                 else
2548                 {
2549                         command_print(cmd_ctx, "usage: arm7_9 dbgrq <enable|disable>");
2550                 }
2551         }
2552
2553         command_print(cmd_ctx, "use of EmbeddedICE dbgrq instead of breakpoint for target halt %s", (arm7_9->use_dbgrq) ? "enabled" : "disabled");
2554
2555         return ERROR_OK;
2556 }
2557
2558 int handle_arm7_9_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2559 {
2560         target_t *target = get_current_target(cmd_ctx);
2561         armv4_5_common_t *armv4_5;
2562         arm7_9_common_t *arm7_9;
2563
2564         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2565         {
2566                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2567                 return ERROR_OK;
2568         }
2569
2570         if (argc > 0)
2571         {
2572                 if (strcmp("enable", args[0]) == 0)
2573                 {
2574                         arm7_9->fast_memory_access = 1;
2575                 }
2576                 else if (strcmp("disable", args[0]) == 0)
2577                 {
2578                         arm7_9->fast_memory_access = 0;
2579                 }
2580                 else
2581                 {
2582                         command_print(cmd_ctx, "usage: arm7_9 fast_memory_access <enable|disable>");
2583                 }
2584         }
2585
2586         command_print(cmd_ctx, "fast memory access is %s", (arm7_9->fast_memory_access) ? "enabled" : "disabled");
2587
2588         return ERROR_OK;
2589 }
2590
2591 int handle_arm7_9_dcc_downloads_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2592 {
2593         target_t *target = get_current_target(cmd_ctx);
2594         armv4_5_common_t *armv4_5;
2595         arm7_9_common_t *arm7_9;
2596
2597         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
2598         {
2599                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
2600                 return ERROR_OK;
2601         }
2602
2603         if (argc > 0)
2604         {
2605                 if (strcmp("enable", args[0]) == 0)
2606                 {
2607                         arm7_9->dcc_downloads = 1;
2608                 }
2609                 else if (strcmp("disable", args[0]) == 0)
2610                 {
2611                         arm7_9->dcc_downloads = 0;
2612                 }
2613                 else
2614                 {
2615                         command_print(cmd_ctx, "usage: arm7_9 dcc_downloads <enable|disable>");
2616                 }
2617         }
2618
2619         command_print(cmd_ctx, "dcc downloads are %s", (arm7_9->dcc_downloads) ? "enabled" : "disabled");
2620
2621         return ERROR_OK;
2622 }
2623
2624 int arm7_9_init_arch_info(target_t *target, arm7_9_common_t *arm7_9)
2625 {
2626         armv4_5_common_t *armv4_5 = &arm7_9->armv4_5_common;
2627
2628         arm7_9->common_magic = ARM7_9_COMMON_MAGIC;
2629
2630         arm_jtag_setup_connection(&arm7_9->jtag_info);
2631         arm7_9->wp_available = 2;
2632         arm7_9->wp0_used = 0;
2633         arm7_9->wp1_used = 0;
2634         arm7_9->force_hw_bkpts = 0;
2635         arm7_9->use_dbgrq = 0;
2636
2637         arm7_9->etm_ctx = NULL;
2638         arm7_9->has_single_step = 0;
2639         arm7_9->has_monitor_mode = 0;
2640         arm7_9->has_vector_catch = 0;
2641
2642         arm7_9->reinit_embeddedice = 0;
2643
2644         arm7_9->debug_entry_from_reset = 0;
2645
2646         arm7_9->dcc_working_area = NULL;
2647
2648         arm7_9->fast_memory_access = 0;
2649         arm7_9->dcc_downloads = 0;
2650
2651         jtag_register_event_callback(arm7_9_jtag_callback, target);
2652
2653         armv4_5->arch_info = arm7_9;
2654         armv4_5->read_core_reg = arm7_9_read_core_reg;
2655         armv4_5->write_core_reg = arm7_9_write_core_reg;
2656         armv4_5->full_context = arm7_9_full_context;
2657
2658         armv4_5_init_arch_info(target, armv4_5);
2659
2660         target_register_timer_callback(arm7_9_handle_target_request, 1, 1, target);
2661
2662         return ERROR_OK;
2663 }