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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   Copyright (C) 2010 by Drasko DRASKOVIC                                *
   9  *   drasko.draskovic@gmail.com                                            *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "arm946e.h"
  31 #include "target_type.h"
  32 #include "arm_opcodes.h"
  33
  34 #include "breakpoints.h"
  35
  36 #if 0
  37 #define _DEBUG_INSTRUCTION_EXECUTION_
  38 #endif
  39
  40 #define NB_CACHE_WAYS 4
  41
  42 static uint32_t dc = 0x0;
  43 static uint32_t ic = 0x0;
  44
  45 /**
  46  * flag to give info about cache manipulation during debug :
  47  * "0"  -       cache lines are invalidated "on the fly", for affected addresses.
  48  *                      This is prefered from performance point of view.
  49  * "1"  -       cache is invalidated and switched off on debug_entry, and switched back on on restore.
  50  *                      It is kept off during debugging.
  51  */
  52 static uint8_t arm946e_preserve_cache;
  53
  54 int arm946e_post_debug_entry(struct target *target);
  55 void arm946e_pre_restore_context(struct target *target);
  56 static int arm946e_read_cp15(struct target *target, int reg_addr, uint32_t *value);
  57
  58
  59 int arm946e_init_arch_info(struct target *target, struct arm946e_common *arm946e, struct jtag_tap *tap)
  60 {
  61         struct arm7_9_common *arm7_9 = &arm946e->arm7_9_common;
  62
  63         /* initialize arm7/arm9 specific info (including armv4_5) */
  64         arm9tdmi_init_arch_info(target, arm7_9, tap);
  65
  66         arm946e->common_magic = ARM946E_COMMON_MAGIC;
  67
  68         /**
  69          * The ARM946E-S implements the ARMv5TE architecture which
  70          * has the BKPT instruction, so we don't have to use a watchpoint comparator
  71          */
  72         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
  73         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
  74
  75
  76         arm7_9->post_debug_entry = arm946e_post_debug_entry;
  77         arm7_9->pre_restore_context = arm946e_pre_restore_context;
  78
  79         /**
  80          * disabling linefills leads to lockups, so keep them enabled for now
  81          * this doesn't affect correctness, but might affect timing issues, if
  82          * important data is evicted from the cache during the debug session
  83          */
  84         arm946e_preserve_cache = 0;
  85
  86         /* override hw single-step capability from ARM9TDMI */
  87         //arm7_9->has_single_step = 1;
  88
  89         return ERROR_OK;
  90 }
  91
  92 static int arm946e_target_create(struct target *target, Jim_Interp *interp)
  93 {
  94         struct arm946e_common *arm946e = calloc(1,sizeof(struct arm946e_common));
  95
  96         arm946e_init_arch_info(target, arm946e, target->tap);
  97
  98         return ERROR_OK;
  99 }
 100
 101 static int arm946e_verify_pointer(struct command_context *cmd_ctx,
 102                 struct arm946e_common *arm946e)
 103 {
 104         if (arm946e->common_magic != ARM946E_COMMON_MAGIC) {
 105                 command_print(cmd_ctx, "target is not an ARM946");
 106                 return ERROR_TARGET_INVALID;
 107         }
 108         return ERROR_OK;
 109 }
 110
 111 /*
 112  * REVISIT:  The "read_cp15" and "write_cp15" commands could hook up
 113  * to eventual mrc() and mcr() routines ... the reg_addr values being
 114  * constructed (for CP15 only) from Opcode_1, Opcode_2, and CRn values.
 115  * See section 7.3 of the ARM946E-S TRM.
 116  */
 117 static int arm946e_read_cp15(struct target *target, int reg_addr, uint32_t *value)
 118 {
 119         int retval = ERROR_OK;
 120         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 121         struct arm_jtag *jtag_info = &arm7_9->jtag_info;
 122         struct scan_field fields[3];
 123         uint8_t reg_addr_buf = reg_addr & 0x3f;
 124         uint8_t nr_w_buf = 0;
 125
 126         if ((retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE)) != ERROR_OK)
 127         {
 128                 return retval;
 129         }
 130         retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_IDLE);
 131         if (retval != ERROR_OK)
 132                 return retval;
 133
 134         fields[0].num_bits = 32;
 135         /* REVISIT: table 7-2 shows that bits 31-31 need to be
 136          * specified for accessing BIST registers ...
 137          */
 138         fields[0].out_value = NULL;
 139         fields[0].in_value = NULL;
 140
 141         fields[1].num_bits = 6;
 142         fields[1].out_value = &reg_addr_buf;
 143         fields[1].in_value = NULL;
 144
 145         fields[2].num_bits = 1;
 146         fields[2].out_value = &nr_w_buf;
 147         fields[2].in_value = NULL;
 148
 149         jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
 150
 151         fields[0].in_value = (uint8_t *)value;
 152         jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
 153
 154         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
 155
 156 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 157         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 158 #endif
 159
 160         if ((retval = jtag_execute_queue()) != ERROR_OK)
 161         {
 162                 return retval;
 163         }
 164
 165         return ERROR_OK;
 166 }
 167
 168 int arm946e_write_cp15(struct target *target, int reg_addr, uint32_t value)
 169 {
 170         int retval = ERROR_OK;
 171         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 172         struct arm_jtag *jtag_info = &arm7_9->jtag_info;
 173         struct scan_field fields[3];
 174         uint8_t reg_addr_buf = reg_addr & 0x3f;
 175         uint8_t nr_w_buf = 1;
 176         uint8_t value_buf[4];
 177
 178         buf_set_u32(value_buf, 0, 32, value);
 179
 180         if ((retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE)) != ERROR_OK)
 181         {
 182                 return retval;
 183         }
 184         retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_IDLE);
 185         if (retval != ERROR_OK)
 186                 return retval;
 187
 188         fields[0].num_bits = 32;
 189         fields[0].out_value = value_buf;
 190         fields[0].in_value = NULL;
 191
 192         fields[1].num_bits = 6;
 193         fields[1].out_value = &reg_addr_buf;
 194         fields[1].in_value = NULL;
 195
 196         fields[2].num_bits = 1;
 197         fields[2].out_value = &nr_w_buf;
 198         fields[2].in_value = NULL;
 199
 200         jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
 201
 202 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 203         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 204 #endif
 205
 206         if ((retval = jtag_execute_queue()) != ERROR_OK)
 207         {
 208                 return retval;
 209         }
 210
 211         return ERROR_OK;
 212 }
 213
 214 uint32_t arm946e_invalidate_whole_dcache(struct target *target)
 215 {
 216
 217    uint32_t csize = 0;
 218    uint32_t shift = 0;
 219    uint32_t cp15_idx, seg, dtag;
 220    int nb_idx, idx = 0;
 221    int retval;
 222
 223    /* Get cache type */
 224    arm946e_read_cp15(target, 0x01, (uint32_t *) &csize);
 225
 226    csize = (csize >> 18) & 0x0F;
 227
 228         if (csize == 0)
 229                 shift = 0;
 230         else
 231                 shift = csize - 0x3; /* Now 0 = 4KB, 1 = 8KB, ... */
 232
 233         /* Cache size, given in bytes */
 234         csize = 1 << (12 + shift);
 235         /* One line (index) is 32 bytes (8 words) long */
 236         nb_idx = (csize / 32);  /* gives nb of lines (indexes) in the cache */
 237
 238         /* Loop for all segmentde (i.e. ways) */
 239         for( seg=0; seg < NB_CACHE_WAYS; seg++)
 240         {
 241                 /* Loop for all indexes */
 242                 for(idx=0; idx < nb_idx; idx++)
 243                 {
 244                         /* Form and write cp15 index (segment + line idx) */
 245                         cp15_idx = seg << 30 | idx << 5;
 246                         retval = arm946e_write_cp15(target, 0x3a, cp15_idx);
 247                         if (retval != ERROR_OK)
 248                         {
 249                                 LOG_DEBUG("ERROR writing index\n");
 250                                 return retval;
 251                         }
 252
 253                         /* Read dtag */
 254                         arm946e_read_cp15(target, 0x16, (uint32_t *) &dtag);
 255
 256                         /* Check cache line VALID bit */
 257                         if ( !(dtag >> 4 & 0x1) )
 258                                 continue;
 259
 260                         /* Clean data cache line */
 261                         retval = arm946e_write_cp15(target, 0x35, 0x1);
 262                         if (retval != ERROR_OK)
 263                         {
 264                                 LOG_DEBUG("ERROR cleaning cache line\n");
 265                                 return retval;
 266                         }
 267
 268                         /* Flush data cache line */
 269                         retval = arm946e_write_cp15(target, 0x1a, 0x1);
 270                         if (retval != ERROR_OK)
 271                         {
 272                                 LOG_DEBUG("ERROR flushing cache line\n");
 273                                 return retval;
 274                         }
 275                 }
 276         }
 277
 278         return ERROR_OK;
 279 }
 280
 281 uint32_t arm946e_invalidate_whole_icache(struct target *target)
 282 {
 283         int retval;
 284
 285         LOG_DEBUG("FLUSHING I$");
 286
 287         /**
 288          *  Invalidate (flush) I$
 289          *  mcr 15, 0, r0, cr7, cr5, {0}
 290          */
 291         retval = arm946e_write_cp15(target, 0x0f, 0x1);
 292         if (retval != ERROR_OK)
 293         {
 294                 LOG_DEBUG("ERROR flushing I$\n");
 295                 return retval;
 296         }
 297
 298         return ERROR_OK;
 299 }
 300
 301 int arm946e_post_debug_entry(struct target *target)
 302 {
 303         uint32_t ctr_reg = 0x0;
 304         uint32_t retval = ERROR_OK;
 305
 306         /* See if CACHES are enabled, and save that info
 307          * in the global vars, so that arm946e_pre_restore_context() can use them */
 308         arm946e_read_cp15(target, 0x02, (uint32_t *) &ctr_reg);
 309         dc = (ctr_reg >> 2) & 0x01;
 310         ic = (ctr_reg >> 12) & 0x01;
 311
 312         if (arm946e_preserve_cache)
 313         {
 314                 if (dc == 1)
 315                 {
 316                         /* Clean and flush D$ */
 317                         arm946e_invalidate_whole_dcache(target);
 318
 319                         /* Disable D$ */
 320                         ctr_reg &= ~(1 << 2);
 321                 }
 322
 323                 if (ic == 1)
 324                 {
 325                         /* Flush I$ */
 326                         arm946e_invalidate_whole_icache(target);
 327
 328                         /* Disable I$ */
 329                         ctr_reg &= ~(1 << 12);
 330                 }
 331
 332                 /* Write the new configuration */
 333                 retval = arm946e_write_cp15(target, 0x02, ctr_reg);
 334                 if (retval != ERROR_OK)
 335                 {
 336                         LOG_DEBUG("ERROR disabling cache");
 337                         return retval;
 338                 }
 339         } /* if preserve_cache */
 340
 341         return ERROR_OK;
 342 }
 343
 344 void arm946e_pre_restore_context(struct target *target)
 345 {
 346         uint32_t ctr_reg = 0x0;
 347         uint32_t retval;
 348
 349         if (arm946e_preserve_cache)
 350         {
 351                 /* Get the contents of the CTR reg */
 352                 arm946e_read_cp15(target, 0x02, (uint32_t *) &ctr_reg);
 353
 354                 /**
 355                  * Read-modify-write CP15 test state register
 356                  * to reenable I/D-cache linefills
 357                  */
 358                 if (dc == 1)
 359                 {
 360                         /* Enable D$ */
 361                         ctr_reg |= 1 << 2;
 362                 }
 363
 364                 if (ic == 1)
 365                 {
 366                         /* Enable I$ */
 367                         ctr_reg |= 1 << 12;
 368                 }
 369
 370                 /* Write the new configuration */
 371                 retval = arm946e_write_cp15(target, 0x02, ctr_reg);
 372                 if (retval != ERROR_OK)
 373                 {
 374                         LOG_DEBUG("ERROR enabling cache\n");
 375                 }
 376         } /* if preserve_cache */
 377 }
 378
 379 uint32_t arm946e_invalidate_dcache(struct target *target, uint32_t address,
 380                 uint32_t size, uint32_t count)
 381 {
 382         uint32_t csize = 0x0;
 383         uint32_t shift = 0;
 384         uint32_t cur_addr = 0x0;
 385         uint32_t cp15_idx, set, way, dtag;
 386         int nb_idx;
 387         uint32_t i = 0;
 388         int retval;
 389
 390         for(i = 0; i < count*size; i++)
 391         {
 392                 cur_addr = address + i;
 393
 394                 /* Get cache type */
 395                 arm946e_read_cp15(target, 0x01, (uint32_t *) &csize);
 396
 397                 /* Conclude cache size to find number of lines */
 398                 csize = (csize >> 18) & 0x0F;
 399
 400                 if (csize == 0)
 401                         shift = 0;
 402                 else
 403                         shift = csize - 0x3; /* Now 0 = 4KB, 1 = 8KB, ... */
 404
 405                 csize = 1 << (12 + shift);
 406                 nb_idx = (csize / 32);
 407
 408                 set = (cur_addr >> 5) & 0xff;   /* set field is 8 bits long */
 409
 410                 for (way = 0; way < NB_CACHE_WAYS; way++)
 411                 {
 412                         /**
 413                          * Find if the affected address is kept in the cache.
 414                          * Because JTAG Scan Chain 15 offers limited approach,
 415                          * we have to loop through all cache ways (segments) and
 416                          * read cache tags, then compare them with with address.
 417                          */
 418
 419                         /* Form and write cp15 index (segment + line idx) */
 420                         cp15_idx = way << 30 | set << 5;
 421                         retval = arm946e_write_cp15(target, 0x3a, cp15_idx);
 422                         if (retval != ERROR_OK)
 423                         {
 424                                 LOG_DEBUG("ERROR writing index\n");
 425                                 return retval;
 426                         }
 427
 428                         /* Read dtag */
 429                         arm946e_read_cp15(target, 0x16, (uint32_t *) &dtag);
 430
 431                         /* Check cache line VALID bit */
 432                         if ( !(dtag >> 4 & 0x1) )
 433                                 continue;
 434
 435                         /* If line is valid and corresponds to affected address - invalidate it */
 436                         if (dtag >> 5 == cur_addr >> 5)
 437                         {
 438                                 /* Clean data cache line */
 439                                 retval = arm946e_write_cp15(target, 0x35, 0x1);
 440                                 if (retval != ERROR_OK)
 441                                 {
 442                                         LOG_DEBUG("ERROR cleaning cache line\n");
 443                                         return retval;
 444                                 }
 445
 446                                 /* Flush data cache line */
 447                                 retval = arm946e_write_cp15(target, 0x1c, 0x1);
 448                                 if (retval != ERROR_OK)
 449                                 {
 450                                         LOG_DEBUG("ERROR flushing cache line\n");
 451                                         return retval;
 452                                 }
 453
 454                                 break;
 455                         }
 456                 } /* loop through all 4 ways */
 457         } /* loop through all addresses */
 458
 459         return ERROR_OK;
 460 }
 461
 462 uint32_t arm946e_invalidate_icache(struct target *target, uint32_t address,
 463                 uint32_t size, uint32_t count)
 464 {
 465         uint32_t cur_addr = 0x0;
 466         uint32_t cp15_idx, set, way, itag;
 467         uint32_t i = 0;
 468         int retval;
 469
 470         for(i = 0; i < count*size; i++)
 471         {
 472                 cur_addr = address + i;
 473
 474                 set = (cur_addr >> 5) & 0xff;   /* set field is 8 bits long */
 475
 476                 for (way = 0; way < NB_CACHE_WAYS; way++)
 477                 {
 478                         /* Form and write cp15 index (segment + line idx) */
 479                         cp15_idx = way << 30 | set << 5;
 480                         retval = arm946e_write_cp15(target, 0x3a, cp15_idx);
 481                         if (retval != ERROR_OK)
 482                         {
 483                                 LOG_DEBUG("ERROR writing index\n");
 484                                 return retval;
 485                         }
 486
 487                         /* Read itag */
 488                         arm946e_read_cp15(target, 0x17, (uint32_t *) &itag);
 489
 490                         /* Check cache line VALID bit */
 491                         if ( !(itag >> 4 & 0x1) )
 492                                 continue;
 493
 494                         /* If line is valid and corresponds to affected address - invalidate it */
 495                         if (itag >> 5 == cur_addr >> 5)
 496                         {
 497                                 /* Flush I$ line */
 498                                 retval = arm946e_write_cp15(target, 0x1d, 0x0);
 499                                 if (retval != ERROR_OK)
 500                                 {
 501                                         LOG_DEBUG("ERROR flushing cache line\n");
 502                                         return retval;
 503                                 }
 504
 505                                 break;
 506                         }
 507                 } /* way loop */
 508         } /* addr loop */
 509
 510         return ERROR_OK;
 511 }
 512
 513 /** Writes a buffer, in the specified word size, with current MMU settings. */
 514 int arm946e_write_memory(struct target *target, uint32_t address,
 515                 uint32_t size, uint32_t count, uint8_t *buffer)
 516 {
 517         int retval;
 518
 519         LOG_DEBUG("-");
 520
 521         /* Invalidate D$ if it is ON */
 522         if (!arm946e_preserve_cache && dc == 1)
 523         {
 524                 arm946e_invalidate_dcache(target, address, size, count);
 525         }
 526
 527         /**
 528          * Write memory
 529          */
 530         if ( ( retval = arm7_9_write_memory(target, address,
 531                         size, count, buffer) ) != ERROR_OK )
 532         {
 533                 return retval;
 534         }
 535
 536         /* *
 537          * Invalidate I$ if it is ON.
 538          *
 539          * D$ has been cleaned and flushed before mem write thus forcing it to behave like write-through,
 540          * because arm7_9_write_memory() has seen non-valid bit in D$
 541          * and wrote data into physical RAM (without touching or allocating the cache line).
 542          * From ARM946ES Technical Reference Manual we can see that it uses "allocate on read-miss"
 543          * policy for both I$ and D$ (Chapter 3.2 and 3.3)
 544          *
 545          * Explanation :
 546          * "ARM system developer's guide: designing and optimizing system software" by
 547          * Andrew N. Sloss, Dominic Symes and Chris Wright,
 548          * Chapter 12.3.3 Allocating Policy on a Cache Miss :
 549          * A read allocate on cache miss policy allocates a cache line only during a read from main memory.
 550          * If the victim cache line contains valid data, then it is written to main memory before the cache line
 551          * is filled with new data.
 552          * Under this strategy, a write of new data to memory does not update the contents of the cache memory
 553          * unless a cache line was allocated on a previous read from main memory.
 554          * If the cache line contains valid data, then the write updates the cache and may update the main memory if
 555          * the cache write policy is write-through.
 556          * If the data is not in the cache, the controller writes to main memory only.
 557          */
 558         if (!arm946e_preserve_cache && ic == 1)
 559         {
 560                 arm946e_invalidate_icache(target, address, size, count);
 561         }
 562
 563         return ERROR_OK;
 564
 565 }
 566
 567 int arm946e_read_memory(struct target *target, uint32_t address,
 568                 uint32_t size, uint32_t count, uint8_t *buffer)
 569 {
 570         int retval;
 571
 572         LOG_DEBUG("-");
 573
 574         if ( ( retval = arm7_9_read_memory(target, address,
 575                         size, count, buffer) ) != ERROR_OK )
 576         {
 577                 return retval;
 578         }
 579
 580         return ERROR_OK;
 581 }
 582
 583
 584 COMMAND_HANDLER(arm946e_handle_cp15_command)
 585 {
 586         int retval;
 587         struct target *target = get_current_target(CMD_CTX);
 588         struct arm946e_common *arm946e = target_to_arm946(target);
 589
 590         retval = arm946e_verify_pointer(CMD_CTX, arm946e);
 591         if (retval != ERROR_OK)
 592                 return retval;
 593
 594         if (target->state != TARGET_HALTED)
 595         {
 596                 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
 597                 return ERROR_OK;
 598         }
 599
 600         /* one or more argument, access a single register (write if second argument is given */
 601         if (CMD_ARGC >= 1)
 602         {
 603                 uint32_t address;
 604                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
 605
 606                 if (CMD_ARGC == 1)
 607                 {
 608                         uint32_t value;
 609                         if ((retval = arm946e_read_cp15(target, address, &value)) != ERROR_OK)
 610                         {
 611                                 command_print(CMD_CTX,
 612                                                 "couldn't access reg %" PRIi32,
 613                                                 address);
 614                                 return ERROR_OK;
 615                         }
 616                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 617                         {
 618                                 return retval;
 619                         }
 620
 621                         command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
 622                                         address, value);
 623                 }
 624                 else if (CMD_ARGC == 2)
 625                 {
 626                         uint32_t value;
 627                         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
 628                         if ((retval = arm946e_write_cp15(target, address, value)) != ERROR_OK)
 629                         {
 630                                 command_print(CMD_CTX,
 631                                                 "couldn't access reg %" PRIi32,
 632                                                 address);
 633                                 return ERROR_OK;
 634                         }
 635                         command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
 636                                         address, value);
 637                 }
 638         }
 639
 640         return ERROR_OK;
 641 }
 642
 643 static const struct command_registration arm946e_exec_command_handlers[] = {
 644         {
 645                 .name = "cp15",
 646                 .handler = arm946e_handle_cp15_command,
 647                 .mode = COMMAND_EXEC,
 648                 .usage = "regnum [value]",
 649                 .help = "display/modify cp15 register",
 650         },
 651         COMMAND_REGISTRATION_DONE
 652 };
 653
 654 const struct command_registration arm946e_command_handlers[] = {
 655         {
 656                 .chain = arm9tdmi_command_handlers,
 657         },
 658         {
 659                 .name = "arm946e",
 660                 .mode = COMMAND_ANY,
 661                 .help = "arm946e command group",
 662                 .chain = arm946e_exec_command_handlers,
 663         },
 664         COMMAND_REGISTRATION_DONE
 665 };
 666
 667 /** Holds methods for ARM946 targets. */
 668 struct target_type arm946e_target =
 669 {
 670         .name = "arm946e",
 671
 672         .poll = arm7_9_poll,
 673         .arch_state = arm_arch_state,
 674
 675         .target_request_data = arm7_9_target_request_data,
 676
 677         .halt = arm7_9_halt,
 678         .resume = arm7_9_resume,
 679         .step = arm7_9_step,
 680
 681         .assert_reset = arm7_9_assert_reset,
 682         .deassert_reset = arm7_9_deassert_reset,
 683         .soft_reset_halt = arm7_9_soft_reset_halt,
 684
 685         .get_gdb_reg_list = arm_get_gdb_reg_list,
 686
 687         //.read_memory = arm7_9_read_memory,
 688         //.write_memory = arm7_9_write_memory,
 689         .read_memory = arm946e_read_memory,
 690         .write_memory = arm946e_write_memory,
 691
 692         .bulk_write_memory = arm7_9_bulk_write_memory,
 693
 694         .checksum_memory = arm_checksum_memory,
 695         .blank_check_memory = arm_blank_check_memory,
 696
 697         .run_algorithm = armv4_5_run_algorithm,
 698
 699         .add_breakpoint = arm7_9_add_breakpoint,
 700         .remove_breakpoint = arm7_9_remove_breakpoint,
 701         //.add_breakpoint = arm946e_add_breakpoint,
 702         //.remove_breakpoint = arm946e_remove_breakpoint,
 703
 704         .add_watchpoint = arm7_9_add_watchpoint,
 705         .remove_watchpoint = arm7_9_remove_watchpoint,
 706
 707         .commands = arm946e_command_handlers,
 708         .target_create = arm946e_target_create,
 709         .init_target = arm9tdmi_init_target,
 710         .examine = arm7_9_examine,
 711         .check_reset = arm7_9_check_reset,
 712 };