src/target/arm720t.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2009 by Øyvind Harboe                                   *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "arm720t.h"
  28 #include <helper/time_support.h>
  29 #include "target_type.h"
  30 #include "register.h"
  31 #include "arm_opcodes.h"
  32
  33
  34 /*
  35  * ARM720 is an ARM7TDMI-S with MMU and ETM7.  For information, see
  36  * ARM DDI 0229C especially Chapter 9 about debug support.
  37  */
  38
  39 #if 0
  40 #define _DEBUG_INSTRUCTION_EXECUTION_
  41 #endif
  42
  43 static int arm720t_scan_cp15(struct target *target,
  44                 uint32_t out, uint32_t *in, int instruction, int clock_arg)
  45 {
  46         int retval;
  47         struct arm720t_common *arm720t = target_to_arm720(target);
  48         struct arm_jtag *jtag_info;
  49         struct scan_field fields[2];
  50         uint8_t out_buf[4];
  51         uint8_t instruction_buf = instruction;
  52
  53         jtag_info = &arm720t->arm7_9_common.jtag_info;
  54
  55         buf_set_u32(out_buf, 0, 32, flip_u32(out, 32));
  56
  57         if ((retval = arm_jtag_scann(jtag_info, 0xf, TAP_DRPAUSE)) != ERROR_OK)
  58         {
  59                 return retval;
  60         }
  61         if ((retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_DRPAUSE)) != ERROR_OK)
  62         {
  63                 return retval;
  64         }
  65
  66         fields[0].num_bits = 1;
  67         fields[0].out_value = &instruction_buf;
  68         fields[0].in_value = NULL;
  69
  70         fields[1].num_bits = 32;
  71         fields[1].out_value = out_buf;
  72         fields[1].in_value = NULL;
  73
  74         if (in)
  75         {
  76                 fields[1].in_value = (uint8_t *)in;
  77                 jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_DRPAUSE);
  78                 jtag_add_callback(arm7flip32, (jtag_callback_data_t)in);
  79         } else
  80         {
  81                 jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_DRPAUSE);
  82         }
  83
  84         if (clock_arg)
  85                 jtag_add_runtest(0, TAP_DRPAUSE);
  86
  87 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
  88         if ((retval = jtag_execute_queue()) != ERROR_OK)
  89         {
  90                 return retval;
  91         }
  92
  93         if (in)
  94                 LOG_DEBUG("out: %8.8x, in: %8.8x, instruction: %i, clock: %i", out, *in, instruction, clock);
  95         else
  96                 LOG_DEBUG("out: %8.8x, instruction: %i, clock: %i", out, instruction, clock_arg);
  97 #else
  98                 LOG_DEBUG("out: %8.8" PRIx32 ", instruction: %i, clock: %i", out, instruction, clock_arg);
  99 #endif
 100
 101         return ERROR_OK;
 102 }
 103
 104 static int arm720t_read_cp15(struct target *target, uint32_t opcode, uint32_t *value)
 105 {
 106         /* fetch CP15 opcode */
 107         arm720t_scan_cp15(target, opcode, NULL, 1, 1);
 108         /* "DECODE" stage */
 109         arm720t_scan_cp15(target, ARMV4_5_NOP, NULL, 1, 1);
 110         /* "EXECUTE" stage (1) */
 111         arm720t_scan_cp15(target, ARMV4_5_NOP, NULL, 1, 0);
 112         arm720t_scan_cp15(target, 0x0, NULL, 0, 1);
 113         /* "EXECUTE" stage (2) */
 114         arm720t_scan_cp15(target, 0x0, NULL, 0, 1);
 115         /* "EXECUTE" stage (3), CDATA is read */
 116         arm720t_scan_cp15(target, ARMV4_5_NOP, value, 1, 1);
 117
 118         return ERROR_OK;
 119 }
 120
 121 static int arm720t_write_cp15(struct target *target, uint32_t opcode, uint32_t value)
 122 {
 123         /* fetch CP15 opcode */
 124         arm720t_scan_cp15(target, opcode, NULL, 1, 1);
 125         /* "DECODE" stage */
 126         arm720t_scan_cp15(target, ARMV4_5_NOP, NULL, 1, 1);
 127         /* "EXECUTE" stage (1) */
 128         arm720t_scan_cp15(target, ARMV4_5_NOP, NULL, 1, 0);
 129         arm720t_scan_cp15(target, 0x0, NULL, 0, 1);
 130         /* "EXECUTE" stage (2) */
 131         arm720t_scan_cp15(target, value, NULL, 0, 1);
 132         arm720t_scan_cp15(target, ARMV4_5_NOP, NULL, 1, 1);
 133
 134         return ERROR_OK;
 135 }
 136
 137 static int arm720t_get_ttb(struct target *target, uint32_t *result)
 138 {
 139         uint32_t ttb = 0x0;
 140
 141         int retval;
 142
 143         retval = arm720t_read_cp15(target, 0xee120f10, &ttb);
 144         if (retval != ERROR_OK)
 145                 return retval;
 146         retval = jtag_execute_queue();
 147         if (retval != ERROR_OK)
 148                 return retval;
 149
 150         ttb &= 0xffffc000;
 151
 152         *result = ttb;
 153
 154         return ERROR_OK;
 155 }
 156
 157 static int arm720t_disable_mmu_caches(struct target *target,
 158                 int mmu, int d_u_cache, int i_cache)
 159 {
 160         uint32_t cp15_control;
 161         int retval;
 162
 163         /* read cp15 control register */
 164         retval = arm720t_read_cp15(target, 0xee110f10, &cp15_control);
 165         if (retval != ERROR_OK)
 166                 return retval;
 167         retval = jtag_execute_queue();
 168         if (retval != ERROR_OK)
 169                 return retval;
 170
 171         if (mmu)
 172                 cp15_control &= ~0x1U;
 173
 174         if (d_u_cache || i_cache)
 175                 cp15_control &= ~0x4U;
 176
 177         retval = arm720t_write_cp15(target, 0xee010f10, cp15_control);
 178         return retval;
 179 }
 180
 181 static int arm720t_enable_mmu_caches(struct target *target,
 182                 int mmu, int d_u_cache, int i_cache)
 183 {
 184         uint32_t cp15_control;
 185         int retval;
 186
 187         /* read cp15 control register */
 188         retval = arm720t_read_cp15(target, 0xee110f10, &cp15_control);
 189         if (retval != ERROR_OK)
 190                 return retval;
 191         retval = jtag_execute_queue();
 192         if (retval != ERROR_OK)
 193                 return retval;
 194
 195         if (mmu)
 196                 cp15_control |= 0x1U;
 197
 198         if (d_u_cache || i_cache)
 199                 cp15_control |= 0x4U;
 200
 201         retval = arm720t_write_cp15(target, 0xee010f10, cp15_control);
 202         return retval;
 203 }
 204
 205 static int arm720t_post_debug_entry(struct target *target)
 206 {
 207         struct arm720t_common *arm720t = target_to_arm720(target);
 208         int retval;
 209
 210         /* examine cp15 control reg */
 211         retval = arm720t_read_cp15(target, 0xee110f10, &arm720t->cp15_control_reg);
 212         if (retval != ERROR_OK)
 213                 return retval;
 214         retval = jtag_execute_queue();
 215         if (retval != ERROR_OK)
 216                 return retval;
 217         LOG_DEBUG("cp15_control_reg: %8.8" PRIx32 "", arm720t->cp15_control_reg);
 218
 219         arm720t->armv4_5_mmu.mmu_enabled = (arm720t->cp15_control_reg & 0x1U) ? 1 : 0;
 220         arm720t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm720t->cp15_control_reg & 0x4U) ? 1 : 0;
 221         arm720t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 222
 223         /* save i/d fault status and address register */
 224         retval = arm720t_read_cp15(target, 0xee150f10, &arm720t->fsr_reg);
 225         if (retval != ERROR_OK)
 226                 return retval;
 227         retval = arm720t_read_cp15(target, 0xee160f10, &arm720t->far_reg);
 228         if (retval != ERROR_OK)
 229                 return retval;
 230         retval = jtag_execute_queue();
 231         return retval;
 232 }
 233
 234 static void arm720t_pre_restore_context(struct target *target)
 235 {
 236         struct arm720t_common *arm720t = target_to_arm720(target);
 237
 238         /* restore i/d fault status and address register */
 239         arm720t_write_cp15(target, 0xee050f10, arm720t->fsr_reg);
 240         arm720t_write_cp15(target, 0xee060f10, arm720t->far_reg);
 241 }
 242
 243 static int arm720t_verify_pointer(struct command_context *cmd_ctx,
 244                 struct arm720t_common *arm720t)
 245 {
 246         if (arm720t->common_magic != ARM720T_COMMON_MAGIC) {
 247                 command_print(cmd_ctx, "target is not an ARM720");
 248                 return ERROR_TARGET_INVALID;
 249         }
 250         return ERROR_OK;
 251 }
 252
 253 static int arm720t_arch_state(struct target *target)
 254 {
 255         struct arm720t_common *arm720t = target_to_arm720(target);
 256         struct arm *armv4_5;
 257
 258         static const char *state[] =
 259         {
 260                 "disabled", "enabled"
 261         };
 262
 263         armv4_5 = &arm720t->arm7_9_common.armv4_5_common;
 264
 265         arm_arch_state(target);
 266         LOG_USER("MMU: %s, Cache: %s",
 267                          state[arm720t->armv4_5_mmu.mmu_enabled],
 268                          state[arm720t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled]);
 269
 270         return ERROR_OK;
 271 }
 272
 273 static int arm720_mmu(struct target *target, int *enabled)
 274 {
 275         if (target->state != TARGET_HALTED) {
 276                 LOG_ERROR("%s: target not halted", __func__);
 277                 return ERROR_TARGET_INVALID;
 278         }
 279
 280         *enabled = target_to_arm720(target)->armv4_5_mmu.mmu_enabled;
 281         return ERROR_OK;
 282 }
 283
 284 static int arm720_virt2phys(struct target *target,
 285                 uint32_t virtual, uint32_t *physical)
 286 {
 287         uint32_t cb;
 288         struct arm720t_common *arm720t = target_to_arm720(target);
 289
 290         uint32_t ret;
 291         int retval = armv4_5_mmu_translate_va(target,
 292                         &arm720t->armv4_5_mmu, virtual, &cb, &ret);
 293         if (retval != ERROR_OK)
 294                 return retval;
 295         *physical = ret;
 296         return ERROR_OK;
 297 }
 298
 299 static int arm720t_read_memory(struct target *target,
 300                 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 301 {
 302         int retval;
 303         struct arm720t_common *arm720t = target_to_arm720(target);
 304
 305         /* disable cache, but leave MMU enabled */
 306         if (arm720t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
 307         {
 308                 retval = arm720t_disable_mmu_caches(target, 0, 1, 0);
 309                 if (retval != ERROR_OK)
 310                         return retval;
 311         }
 312         retval = arm7_9_read_memory(target, address, size, count, buffer);
 313
 314         if (arm720t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
 315         {
 316                 retval = arm720t_enable_mmu_caches(target, 0, 1, 0);
 317                 if (retval != ERROR_OK)
 318                         return retval;
 319         }
 320
 321         return retval;
 322 }
 323
 324 static int arm720t_read_phys_memory(struct target *target,
 325                 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 326 {
 327         struct arm720t_common *arm720t = target_to_arm720(target);
 328
 329         return armv4_5_mmu_read_physical(target, &arm720t->armv4_5_mmu, address, size, count, buffer);
 330 }
 331
 332 static int arm720t_write_phys_memory(struct target *target,
 333                 uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer)
 334 {
 335         struct arm720t_common *arm720t = target_to_arm720(target);
 336
 337         return armv4_5_mmu_write_physical(target, &arm720t->armv4_5_mmu, address, size, count, buffer);
 338 }
 339
 340 static int arm720t_soft_reset_halt(struct target *target)
 341 {
 342         int retval = ERROR_OK;
 343         struct arm720t_common *arm720t = target_to_arm720(target);
 344         struct reg *dbg_stat = &arm720t->arm7_9_common
 345                         .eice_cache->reg_list[EICE_DBG_STAT];
 346         struct arm *armv4_5 = &arm720t->arm7_9_common
 347                         .armv4_5_common;
 348
 349         if ((retval = target_halt(target)) != ERROR_OK)
 350         {
 351                 return retval;
 352         }
 353
 354         long long then = timeval_ms();
 355         int timeout;
 356         while (!(timeout = ((timeval_ms()-then) > 1000)))
 357         {
 358                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 359                 {
 360                         embeddedice_read_reg(dbg_stat);
 361                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 362                         {
 363                                 return retval;
 364                         }
 365                 } else
 366                 {
 367                         break;
 368                 }
 369                 if (debug_level >= 3)
 370                 {
 371                         alive_sleep(100);
 372                 } else
 373                 {
 374                         keep_alive();
 375                 }
 376         }
 377         if (timeout)
 378         {
 379                 LOG_ERROR("Failed to halt CPU after 1 sec");
 380                 return ERROR_TARGET_TIMEOUT;
 381         }
 382
 383         target->state = TARGET_HALTED;
 384
 385         /* SVC, ARM state, IRQ and FIQ disabled */
 386         uint32_t cpsr;
 387
 388         cpsr = buf_get_u32(armv4_5->cpsr->value, 0, 32);
 389         cpsr &= ~0xff;
 390         cpsr |= 0xd3;
 391         arm_set_cpsr(armv4_5, cpsr);
 392         armv4_5->cpsr->dirty = 1;
 393
 394         /* start fetching from 0x0 */
 395         buf_set_u32(armv4_5->pc->value, 0, 32, 0x0);
 396         armv4_5->pc->dirty = 1;
 397         armv4_5->pc->valid = 1;
 398
 399         retval = arm720t_disable_mmu_caches(target, 1, 1, 1);
 400         if (retval != ERROR_OK)
 401                 return retval;
 402         arm720t->armv4_5_mmu.mmu_enabled = 0;
 403         arm720t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 404         arm720t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 405
 406         if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
 407         {
 408                 return retval;
 409         }
 410
 411         return ERROR_OK;
 412 }
 413
 414 static int arm720t_init_target(struct command_context *cmd_ctx, struct target *target)
 415 {
 416         return arm7tdmi_init_target(cmd_ctx, target);
 417 }
 418
 419 /* FIXME remove forward decls */
 420 static int arm720t_mrc(struct target *target, int cpnum,
 421                 uint32_t op1, uint32_t op2,
 422                 uint32_t CRn, uint32_t CRm,
 423                 uint32_t *value);
 424 static int arm720t_mcr(struct target *target, int cpnum,
 425                 uint32_t op1, uint32_t op2,
 426                 uint32_t CRn, uint32_t CRm,
 427                 uint32_t value);
 428
 429 static int arm720t_init_arch_info(struct target *target,
 430                 struct arm720t_common *arm720t, struct jtag_tap *tap)
 431 {
 432         struct arm7_9_common *arm7_9 = &arm720t->arm7_9_common;
 433
 434         arm7_9->armv4_5_common.mrc = arm720t_mrc;
 435         arm7_9->armv4_5_common.mcr = arm720t_mcr;
 436
 437         arm7tdmi_init_arch_info(target, arm7_9, tap);
 438
 439         arm720t->common_magic = ARM720T_COMMON_MAGIC;
 440
 441         arm7_9->post_debug_entry = arm720t_post_debug_entry;
 442         arm7_9->pre_restore_context = arm720t_pre_restore_context;
 443
 444         arm720t->armv4_5_mmu.armv4_5_cache.ctype = -1;
 445         arm720t->armv4_5_mmu.get_ttb = arm720t_get_ttb;
 446         arm720t->armv4_5_mmu.read_memory = arm7_9_read_memory;
 447         arm720t->armv4_5_mmu.write_memory = arm7_9_write_memory;
 448         arm720t->armv4_5_mmu.disable_mmu_caches = arm720t_disable_mmu_caches;
 449         arm720t->armv4_5_mmu.enable_mmu_caches = arm720t_enable_mmu_caches;
 450         arm720t->armv4_5_mmu.has_tiny_pages = 0;
 451         arm720t->armv4_5_mmu.mmu_enabled = 0;
 452
 453         return ERROR_OK;
 454 }
 455
 456 static int arm720t_target_create(struct target *target, Jim_Interp *interp)
 457 {
 458         struct arm720t_common *arm720t = calloc(1, sizeof(*arm720t));
 459
 460         arm720t->arm7_9_common.armv4_5_common.is_armv4 = true;
 461         return arm720t_init_arch_info(target, arm720t, target->tap);
 462 }
 463
 464 COMMAND_HANDLER(arm720t_handle_cp15_command)
 465 {
 466         int retval;
 467         struct target *target = get_current_target(CMD_CTX);
 468         struct arm720t_common *arm720t = target_to_arm720(target);
 469         struct arm_jtag *jtag_info;
 470
 471         retval = arm720t_verify_pointer(CMD_CTX, arm720t);
 472         if (retval != ERROR_OK)
 473                 return retval;
 474
 475         jtag_info = &arm720t->arm7_9_common.jtag_info;
 476
 477         if (target->state != TARGET_HALTED)
 478         {
 479                 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
 480                 return ERROR_OK;
 481         }
 482
 483         /* one or more argument, access a single register (write if second argument is given */
 484         if (CMD_ARGC >= 1)
 485         {
 486                 uint32_t opcode;
 487                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], opcode);
 488
 489                 if (CMD_ARGC == 1)
 490                 {
 491                         uint32_t value;
 492                         if ((retval = arm720t_read_cp15(target, opcode, &value)) != ERROR_OK)
 493                         {
 494                                 command_print(CMD_CTX, "couldn't access cp15 with opcode 0x%8.8" PRIx32 "", opcode);
 495                                 return ERROR_OK;
 496                         }
 497
 498                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 499                         {
 500                                 return retval;
 501                         }
 502
 503                         command_print(CMD_CTX, "0x%8.8" PRIx32 ": 0x%8.8" PRIx32 "", opcode, value);
 504                 }
 505                 else if (CMD_ARGC == 2)
 506                 {
 507                         uint32_t value;
 508                         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
 509
 510                         if ((retval = arm720t_write_cp15(target, opcode, value)) != ERROR_OK)
 511                         {
 512                                 command_print(CMD_CTX, "couldn't access cp15 with opcode 0x%8.8" PRIx32 "", opcode);
 513                                 return ERROR_OK;
 514                         }
 515                         command_print(CMD_CTX, "0x%8.8" PRIx32 ": 0x%8.8" PRIx32 "", opcode, value);
 516                 }
 517         }
 518
 519         return ERROR_OK;
 520 }
 521
 522 static int arm720t_mrc(struct target *target, int cpnum,
 523                 uint32_t op1, uint32_t op2,
 524                 uint32_t CRn, uint32_t CRm,
 525                 uint32_t *value)
 526 {
 527         if (cpnum!=15)
 528         {
 529                 LOG_ERROR("Only cp15 is supported");
 530                 return ERROR_FAIL;
 531         }
 532
 533         /* read "to" r0 */
 534         return arm720t_read_cp15(target,
 535                         ARMV4_5_MRC(cpnum, op1, 0, CRn, CRm, op2),
 536                         value);
 537
 538 }
 539
 540 static int arm720t_mcr(struct target *target, int cpnum,
 541                 uint32_t op1, uint32_t op2,
 542                 uint32_t CRn, uint32_t CRm,
 543                 uint32_t value)
 544 {
 545         if (cpnum!=15)
 546         {
 547                 LOG_ERROR("Only cp15 is supported");
 548                 return ERROR_FAIL;
 549         }
 550
 551         /* write "from" r0 */
 552         return arm720t_write_cp15(target,
 553                         ARMV4_5_MCR(cpnum, op1, 0, CRn, CRm, op2),
 554                         value);
 555 }
 556
 557 static const struct command_registration arm720t_exec_command_handlers[] = {
 558         {
 559                 .name = "cp15",
 560                 .handler = arm720t_handle_cp15_command,
 561                 .mode = COMMAND_EXEC,
 562                 /* prefer using less error-prone "arm mcr" or "arm mrc" */
 563                 .help = "display/modify cp15 register using ARM opcode"
 564                         " (DEPRECATED)",
 565                 .usage = "instruction [value]",
 566         },
 567         COMMAND_REGISTRATION_DONE
 568 };
 569
 570 static const struct command_registration arm720t_command_handlers[] = {
 571         {
 572                 .chain = arm7_9_command_handlers,
 573         },
 574         {
 575                 .name = "arm720t",
 576                 .mode = COMMAND_ANY,
 577                 .help = "arm720t command group",
 578                 .chain = arm720t_exec_command_handlers,
 579         },
 580         COMMAND_REGISTRATION_DONE
 581 };
 582
 583 /** Holds methods for ARM720 targets. */
 584 struct target_type arm720t_target =
 585 {
 586         .name = "arm720t",
 587
 588         .poll = arm7_9_poll,
 589         .arch_state = arm720t_arch_state,
 590
 591         .halt = arm7_9_halt,
 592         .resume = arm7_9_resume,
 593         .step = arm7_9_step,
 594
 595         .assert_reset = arm7_9_assert_reset,
 596         .deassert_reset = arm7_9_deassert_reset,
 597         .soft_reset_halt = arm720t_soft_reset_halt,
 598
 599         .get_gdb_reg_list = arm_get_gdb_reg_list,
 600
 601         .read_memory = arm720t_read_memory,
 602         .write_memory = arm7_9_write_memory,
 603         .read_phys_memory = arm720t_read_phys_memory,
 604         .write_phys_memory = arm720t_write_phys_memory,
 605         .mmu = arm720_mmu,
 606         .virt2phys = arm720_virt2phys,
 607
 608         .bulk_write_memory = arm7_9_bulk_write_memory,
 609
 610         .checksum_memory = arm_checksum_memory,
 611         .blank_check_memory = arm_blank_check_memory,
 612
 613         .run_algorithm = armv4_5_run_algorithm,
 614
 615         .add_breakpoint = arm7_9_add_breakpoint,
 616         .remove_breakpoint = arm7_9_remove_breakpoint,
 617         .add_watchpoint = arm7_9_add_watchpoint,
 618         .remove_watchpoint = arm7_9_remove_watchpoint,
 619
 620         .commands = arm720t_command_handlers,
 621         .target_create = arm720t_target_create,
 622         .init_target = arm720t_init_target,
 623         .examine = arm7_9_examine,
 624         .check_reset = arm7_9_check_reset,
 625 };