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   1 /***************************************************************************
   2  *   Copyright (C) 2008 digenius technology GmbH.                          *
   3  *   Michael Bruck                                                         *
   4  *                                                                         *
   5  *   Copyright (C) 2008,2009 Oyvind Harboe oyvind.harboe@zylin.com         *
   6  *                                                                         *
   7  *   Copyright (C) 2008 Georg Acher <acher@in.tum.de>                      *
   8  *                                                                         *
   9  *   Copyright (C) 2009 David Brownell                                     *
  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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  25  ***************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include "etm.h"
  32 #include "breakpoints.h"
  33 #include "arm11_dbgtap.h"
  34 #include "arm_simulator.h"
  35 #include <helper/time_support.h>
  36 #include "target_type.h"
  37 #include "algorithm.h"
  38 #include "register.h"
  39 #include "arm_opcodes.h"
  40
  41 #if 0
  42 #define _DEBUG_INSTRUCTION_EXECUTION_
  43 #endif
  44
  45
  46 static int arm11_step(struct target *target, int current,
  47                 uint32_t address, int handle_breakpoints);
  48
  49
  50 /** Check and if necessary take control of the system
  51  *
  52  * \param arm11         Target state variable.
  53  */
  54 static int arm11_check_init(struct arm11_common *arm11)
  55 {
  56         CHECK_RETVAL(arm11_read_DSCR(arm11));
  57
  58         if (!(arm11->dscr & DSCR_HALT_DBG_MODE)) {
  59                 LOG_DEBUG("DSCR %08x", (unsigned) arm11->dscr);
  60                 LOG_DEBUG("Bringing target into debug mode");
  61
  62                 arm11->dscr |= DSCR_HALT_DBG_MODE;
  63                 CHECK_RETVAL(arm11_write_DSCR(arm11, arm11->dscr));
  64
  65                 /* add further reset initialization here */
  66
  67                 arm11->simulate_reset_on_next_halt = true;
  68
  69                 if (arm11->dscr & DSCR_CORE_HALTED) {
  70                         /** \todo TODO: this needs further scrutiny because
  71                           * arm11_debug_entry() never gets called.  (WHY NOT?)
  72                           * As a result we don't read the actual register states from
  73                           * the target.
  74                           */
  75
  76                         arm11->arm.target->state = TARGET_HALTED;
  77                         arm_dpm_report_dscr(arm11->arm.dpm, arm11->dscr);
  78                 } else {
  79                         arm11->arm.target->state = TARGET_RUNNING;
  80                         arm11->arm.target->debug_reason = DBG_REASON_NOTHALTED;
  81                 }
  82
  83                 CHECK_RETVAL(arm11_sc7_clear_vbw(arm11));
  84         }
  85
  86         return ERROR_OK;
  87 }
  88
  89 /**
  90  * Save processor state.  This is called after a HALT instruction
  91  * succeeds, and on other occasions the processor enters debug mode
  92  * (breakpoint, watchpoint, etc).  Caller has updated arm11->dscr.
  93  */
  94 static int arm11_debug_entry(struct arm11_common *arm11)
  95 {
  96         int retval;
  97
  98         arm11->arm.target->state = TARGET_HALTED;
  99         arm_dpm_report_dscr(arm11->arm.dpm, arm11->dscr);
 100
 101         /* REVISIT entire cache should already be invalid !!! */
 102         register_cache_invalidate(arm11->arm.core_cache);
 103
 104         /* See e.g. ARM1136 TRM, "14.8.4 Entering Debug state" */
 105
 106         /* maybe save wDTR (pending DCC write to debug SW, e.g. libdcc) */
 107         arm11->is_wdtr_saved = !!(arm11->dscr & DSCR_DTR_TX_FULL);
 108         if (arm11->is_wdtr_saved) {
 109                 arm11_add_debug_SCAN_N(arm11, 0x05, ARM11_TAP_DEFAULT);
 110
 111                 arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
 112
 113                 struct scan_field chain5_fields[3];
 114
 115                 arm11_setup_field(arm11, 32, NULL,
 116                         &arm11->saved_wdtr, chain5_fields + 0);
 117                 arm11_setup_field(arm11,  1, NULL, NULL, chain5_fields + 1);
 118                 arm11_setup_field(arm11,  1, NULL, NULL, chain5_fields + 2);
 119
 120                 arm11_add_dr_scan_vc(arm11->arm.target->tap, ARRAY_SIZE(
 121                                 chain5_fields), chain5_fields, TAP_DRPAUSE);
 122
 123         }
 124
 125         /* DSCR: set the Execute ARM instruction enable bit.
 126          *
 127          * ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode",
 128          * but not to issue ITRs(?).  The ARMv7 arch spec says it's required
 129          * for executing instructions via ITR.
 130          */
 131         CHECK_RETVAL(arm11_write_DSCR(arm11, DSCR_ITR_EN | arm11->dscr));
 132
 133
 134         /* From the spec:
 135            Before executing any instruction in debug state you have to drain the write buffer.
 136            This ensures that no imprecise Data Aborts can return at a later point:*/
 137
 138         /** \todo TODO: Test drain write buffer. */
 139
 140 #if 0
 141         while (1) {
 142                 /* MRC p14,0,R0,c5,c10,0 */
 143                 /*      arm11_run_instr_no_data1(arm11, / *0xee150e1a* /0xe320f000); */
 144
 145                 /* mcr     15, 0, r0, cr7, cr10, {4} */
 146                 arm11_run_instr_no_data1(arm11, 0xee070f9a);
 147
 148                 uint32_t dscr = arm11_read_DSCR(arm11);
 149
 150                 LOG_DEBUG("DRAIN, DSCR %08x", dscr);
 151
 152                 if (dscr & ARM11_DSCR_STICKY_IMPRECISE_DATA_ABORT) {
 153                         arm11_run_instr_no_data1(arm11, 0xe320f000);
 154
 155                         dscr = arm11_read_DSCR(arm11);
 156
 157                         LOG_DEBUG("DRAIN, DSCR %08x (DONE)", dscr);
 158
 159                         break;
 160                 }
 161         }
 162 #endif
 163
 164         /* Save registers.
 165          *
 166          * NOTE:  ARM1136 TRM suggests saving just R0 here now, then
 167          * CPSR and PC after the rDTR stuff.  We do it all at once.
 168          */
 169         retval = arm_dpm_read_current_registers(&arm11->dpm);
 170         if (retval != ERROR_OK)
 171                 LOG_ERROR("DPM REG READ -- fail");
 172
 173         retval = arm11_run_instr_data_prepare(arm11);
 174         if (retval != ERROR_OK)
 175                 return retval;
 176
 177         /* maybe save rDTR (pending DCC read from debug SW, e.g. libdcc) */
 178         arm11->is_rdtr_saved = !!(arm11->dscr & DSCR_DTR_RX_FULL);
 179         if (arm11->is_rdtr_saved) {
 180                 /* MRC p14,0,R0,c0,c5,0 (move rDTR -> r0 (-> wDTR -> local var)) */
 181                 retval = arm11_run_instr_data_from_core_via_r0(arm11,
 182                                 0xEE100E15, &arm11->saved_rdtr);
 183                 if (retval != ERROR_OK)
 184                         return retval;
 185         }
 186
 187         /* REVISIT Now that we've saved core state, there's may also
 188          * be MMU and cache state to care about ...
 189          */
 190
 191         if (arm11->simulate_reset_on_next_halt) {
 192                 arm11->simulate_reset_on_next_halt = false;
 193
 194                 LOG_DEBUG("Reset c1 Control Register");
 195
 196                 /* Write 0 (reset value) to Control register 0 to disable MMU/Cache etc. */
 197
 198                 /* MCR p15,0,R0,c1,c0,0 */
 199                 retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xee010f10, 0);
 200                 if (retval != ERROR_OK)
 201                         return retval;
 202
 203         }
 204
 205         if (arm11->arm.target->debug_reason == DBG_REASON_WATCHPOINT) {
 206                 uint32_t wfar;
 207
 208                 /* MRC p15, 0, <Rd>, c6, c0, 1 ; Read WFAR */
 209                 retval = arm11_run_instr_data_from_core_via_r0(arm11,
 210                                 ARMV4_5_MRC(15, 0, 0, 6, 0, 1),
 211                                 &wfar);
 212                 if (retval != ERROR_OK)
 213                         return retval;
 214                 arm_dpm_report_wfar(arm11->arm.dpm, wfar);
 215         }
 216
 217
 218         retval = arm11_run_instr_data_finish(arm11);
 219         if (retval != ERROR_OK)
 220                 return retval;
 221
 222         return ERROR_OK;
 223 }
 224
 225 /**
 226  * Restore processor state.  This is called in preparation for
 227  * the RESTART function.
 228  */
 229 static int arm11_leave_debug_state(struct arm11_common *arm11, bool bpwp)
 230 {
 231         int retval;
 232
 233         /* See e.g. ARM1136 TRM, "14.8.5 Leaving Debug state" */
 234
 235         /* NOTE:  the ARM1136 TRM suggests restoring all registers
 236          * except R0/PC/CPSR right now.  Instead, we do them all
 237          * at once, just a bit later on.
 238          */
 239
 240         /* REVISIT once we start caring about MMU and cache state,
 241          * address it here ...
 242          */
 243
 244         /* spec says clear wDTR and rDTR; we assume they are clear as
 245            otherwise our programming would be sloppy */
 246         {
 247                 CHECK_RETVAL(arm11_read_DSCR(arm11));
 248
 249                 if (arm11->dscr & (DSCR_DTR_RX_FULL | DSCR_DTR_TX_FULL)) {
 250                         /*
 251                         The wDTR/rDTR two registers that are used to send/receive data to/from
 252                         the core in tandem with corresponding instruction codes that are
 253                         written into the core. The RDTR FULL/WDTR FULL flag indicates that the
 254                         registers hold data that was written by one side (CPU or JTAG) and not
 255                         read out by the other side.
 256                         */
 257                         LOG_ERROR("wDTR/rDTR inconsistent (DSCR %08x)",
 258                                 (unsigned) arm11->dscr);
 259                         return ERROR_FAIL;
 260                 }
 261         }
 262
 263         /* maybe restore original wDTR */
 264         if (arm11->is_wdtr_saved) {
 265                 retval = arm11_run_instr_data_prepare(arm11);
 266                 if (retval != ERROR_OK)
 267                         return retval;
 268
 269                 /* MCR p14,0,R0,c0,c5,0 */
 270                 retval = arm11_run_instr_data_to_core_via_r0(arm11,
 271                                 0xee000e15, arm11->saved_wdtr);
 272                 if (retval != ERROR_OK)
 273                         return retval;
 274
 275                 retval = arm11_run_instr_data_finish(arm11);
 276                 if (retval != ERROR_OK)
 277                         return retval;
 278         }
 279
 280         /* restore CPSR, PC, and R0 ... after flushing any modified
 281          * registers.
 282          */
 283         CHECK_RETVAL(arm_dpm_write_dirty_registers(&arm11->dpm, bpwp));
 284
 285         CHECK_RETVAL(arm11_bpwp_flush(arm11));
 286
 287         register_cache_invalidate(arm11->arm.core_cache);
 288
 289         /* restore DSCR */
 290         CHECK_RETVAL(arm11_write_DSCR(arm11, arm11->dscr));
 291
 292         /* maybe restore rDTR */
 293         if (arm11->is_rdtr_saved) {
 294                 arm11_add_debug_SCAN_N(arm11, 0x05, ARM11_TAP_DEFAULT);
 295
 296                 arm11_add_IR(arm11, ARM11_EXTEST, ARM11_TAP_DEFAULT);
 297
 298                 struct scan_field chain5_fields[3];
 299
 300                 uint8_t Ready           = 0;                    /* ignored */
 301                 uint8_t Valid           = 0;                    /* ignored */
 302
 303                 arm11_setup_field(arm11, 32, &arm11->saved_rdtr,
 304                         NULL, chain5_fields + 0);
 305                 arm11_setup_field(arm11,  1, &Ready,    NULL, chain5_fields + 1);
 306                 arm11_setup_field(arm11,  1, &Valid,    NULL, chain5_fields + 2);
 307
 308                 arm11_add_dr_scan_vc(arm11->arm.target->tap, ARRAY_SIZE(
 309                                 chain5_fields), chain5_fields, TAP_DRPAUSE);
 310         }
 311
 312         /* now processor is ready to RESTART */
 313
 314         return ERROR_OK;
 315 }
 316
 317 /* poll current target status */
 318 static int arm11_poll(struct target *target)
 319 {
 320         int retval;
 321         struct arm11_common *arm11 = target_to_arm11(target);
 322
 323         CHECK_RETVAL(arm11_check_init(arm11));
 324
 325         if (arm11->dscr & DSCR_CORE_HALTED) {
 326                 if (target->state != TARGET_HALTED) {
 327                         enum target_state old_state = target->state;
 328
 329                         LOG_DEBUG("enter TARGET_HALTED");
 330                         retval = arm11_debug_entry(arm11);
 331                         if (retval != ERROR_OK)
 332                                 return retval;
 333
 334                         target_call_event_callbacks(target,
 335                                 (old_state == TARGET_DEBUG_RUNNING)
 336                                 ? TARGET_EVENT_DEBUG_HALTED
 337                                 : TARGET_EVENT_HALTED);
 338                 }
 339         } else {
 340                 if (target->state != TARGET_RUNNING && target->state != TARGET_DEBUG_RUNNING) {
 341                         LOG_DEBUG("enter TARGET_RUNNING");
 342                         target->state                   = TARGET_RUNNING;
 343                         target->debug_reason    = DBG_REASON_NOTHALTED;
 344                 }
 345         }
 346
 347         return ERROR_OK;
 348 }
 349 /* architecture specific status reply */
 350 static int arm11_arch_state(struct target *target)
 351 {
 352         struct arm11_common *arm11 = target_to_arm11(target);
 353         int retval;
 354
 355         retval = arm_arch_state(target);
 356
 357         /* REVISIT also display ARM11-specific MMU and cache status ... */
 358
 359         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 360                 LOG_USER("Watchpoint triggered at PC %#08x",
 361                         (unsigned) arm11->dpm.wp_pc);
 362
 363         return retval;
 364 }
 365
 366 /* target request support */
 367 static int arm11_target_request_data(struct target *target,
 368         uint32_t size, uint8_t *buffer)
 369 {
 370         LOG_WARNING("Not implemented: %s", __func__);
 371
 372         return ERROR_FAIL;
 373 }
 374
 375 /* target execution control */
 376 static int arm11_halt(struct target *target)
 377 {
 378         struct arm11_common *arm11 = target_to_arm11(target);
 379
 380         LOG_DEBUG("target->state: %s",
 381                 target_state_name(target));
 382
 383         if (target->state == TARGET_UNKNOWN)
 384                 arm11->simulate_reset_on_next_halt = true;
 385
 386         if (target->state == TARGET_HALTED) {
 387                 LOG_DEBUG("target was already halted");
 388                 return ERROR_OK;
 389         }
 390
 391         arm11_add_IR(arm11, ARM11_HALT, TAP_IDLE);
 392
 393         CHECK_RETVAL(jtag_execute_queue());
 394
 395         int i = 0;
 396
 397         while (1) {
 398                 CHECK_RETVAL(arm11_read_DSCR(arm11));
 399
 400                 if (arm11->dscr & DSCR_CORE_HALTED)
 401                         break;
 402
 403
 404                 long long then = 0;
 405                 if (i == 1000)
 406                         then = timeval_ms();
 407                 if (i >= 1000) {
 408                         if ((timeval_ms()-then) > 1000) {
 409                                 LOG_WARNING("Timeout (1000ms) waiting for instructions to complete");
 410                                 return ERROR_FAIL;
 411                         }
 412                 }
 413                 i++;
 414         }
 415
 416         enum target_state old_state     = target->state;
 417
 418         CHECK_RETVAL(arm11_debug_entry(arm11));
 419
 420         CHECK_RETVAL(
 421                 target_call_event_callbacks(target,
 422                         old_state ==
 423                         TARGET_DEBUG_RUNNING ? TARGET_EVENT_DEBUG_HALTED : TARGET_EVENT_HALTED));
 424
 425         return ERROR_OK;
 426 }
 427
 428 static uint32_t arm11_nextpc(struct arm11_common *arm11, int current, uint32_t address)
 429 {
 430         void *value = arm11->arm.pc->value;
 431
 432         if (!current)
 433                 buf_set_u32(value, 0, 32, address);
 434         else
 435                 address = buf_get_u32(value, 0, 32);
 436
 437         return address;
 438 }
 439
 440 static int arm11_resume(struct target *target, int current,
 441         uint32_t address, int handle_breakpoints, int debug_execution)
 442 {
 443         /*        LOG_DEBUG("current %d  address %08x  handle_breakpoints %d  debug_execution %d", */
 444         /*      current, address, handle_breakpoints, debug_execution); */
 445
 446         struct arm11_common *arm11 = target_to_arm11(target);
 447
 448         LOG_DEBUG("target->state: %s",
 449                 target_state_name(target));
 450
 451
 452         if (target->state != TARGET_HALTED) {
 453                 LOG_ERROR("Target not halted");
 454                 return ERROR_TARGET_NOT_HALTED;
 455         }
 456
 457         address = arm11_nextpc(arm11, current, address);
 458
 459         LOG_DEBUG("RESUME PC %08" PRIx32 "%s", address, !current ? "!" : "");
 460
 461         /* clear breakpoints/watchpoints and VCR*/
 462         CHECK_RETVAL(arm11_sc7_clear_vbw(arm11));
 463
 464         if (!debug_execution)
 465                 target_free_all_working_areas(target);
 466
 467         /* Should we skip over breakpoints matching the PC? */
 468         if (handle_breakpoints) {
 469                 struct breakpoint *bp;
 470
 471                 for (bp = target->breakpoints; bp; bp = bp->next) {
 472                         if (bp->address == address) {
 473                                 LOG_DEBUG("must step over %08" PRIx32 "", bp->address);
 474                                 arm11_step(target, 1, 0, 0);
 475                                 break;
 476                         }
 477                 }
 478         }
 479
 480         /* activate all breakpoints */
 481         if (true) {
 482                 struct breakpoint *bp;
 483                 unsigned brp_num = 0;
 484
 485                 for (bp = target->breakpoints; bp; bp = bp->next) {
 486                         struct arm11_sc7_action brp[2];
 487
 488                         brp[0].write    = 1;
 489                         brp[0].address  = ARM11_SC7_BVR0 + brp_num;
 490                         brp[0].value    = bp->address;
 491                         brp[1].write    = 1;
 492                         brp[1].address  = ARM11_SC7_BCR0 + brp_num;
 493                         brp[1].value    = 0x1 |
 494                                 (3 <<
 495                                  1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
 496
 497                         CHECK_RETVAL(arm11_sc7_run(arm11, brp, ARRAY_SIZE(brp)));
 498
 499                         LOG_DEBUG("Add BP %d at %08" PRIx32, brp_num,
 500                                 bp->address);
 501
 502                         brp_num++;
 503                 }
 504
 505                 if (arm11->vcr)
 506                         CHECK_RETVAL(arm11_sc7_set_vcr(arm11, arm11->vcr));
 507         }
 508
 509         /* activate all watchpoints and breakpoints */
 510         CHECK_RETVAL(arm11_leave_debug_state(arm11, true));
 511
 512         arm11_add_IR(arm11, ARM11_RESTART, TAP_IDLE);
 513
 514         CHECK_RETVAL(jtag_execute_queue());
 515
 516         int i = 0;
 517         while (1) {
 518                 CHECK_RETVAL(arm11_read_DSCR(arm11));
 519
 520                 LOG_DEBUG("DSCR %08x", (unsigned) arm11->dscr);
 521
 522                 if (arm11->dscr & DSCR_CORE_RESTARTED)
 523                         break;
 524
 525
 526                 long long then = 0;
 527                 if (i == 1000)
 528                         then = timeval_ms();
 529                 if (i >= 1000) {
 530                         if ((timeval_ms()-then) > 1000) {
 531                                 LOG_WARNING("Timeout (1000ms) waiting for instructions to complete");
 532                                 return ERROR_FAIL;
 533                         }
 534                 }
 535                 i++;
 536         }
 537
 538         target->debug_reason = DBG_REASON_NOTHALTED;
 539         if (!debug_execution)
 540                 target->state = TARGET_RUNNING;
 541         else
 542                 target->state = TARGET_DEBUG_RUNNING;
 543         CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_RESUMED));
 544
 545         return ERROR_OK;
 546 }
 547
 548 static int arm11_step(struct target *target, int current,
 549         uint32_t address, int handle_breakpoints)
 550 {
 551         LOG_DEBUG("target->state: %s",
 552                 target_state_name(target));
 553
 554         if (target->state != TARGET_HALTED) {
 555                 LOG_WARNING("target was not halted");
 556                 return ERROR_TARGET_NOT_HALTED;
 557         }
 558
 559         struct arm11_common *arm11 = target_to_arm11(target);
 560
 561         address = arm11_nextpc(arm11, current, address);
 562
 563         LOG_DEBUG("STEP PC %08" PRIx32 "%s", address, !current ? "!" : "");
 564
 565
 566         /** \todo TODO: Thumb not supported here */
 567
 568         uint32_t next_instruction;
 569
 570         CHECK_RETVAL(arm11_read_memory_word(arm11, address, &next_instruction));
 571
 572         /* skip over BKPT */
 573         if ((next_instruction & 0xFFF00070) == 0xe1200070) {
 574                 address = arm11_nextpc(arm11, 0, address + 4);
 575                 LOG_DEBUG("Skipping BKPT %08" PRIx32, address);
 576         }
 577         /* skip over Wait for interrupt / Standby
 578          * mcr  15, 0, r?, cr7, cr0, {4} */
 579         else if ((next_instruction & 0xFFFF0FFF) == 0xee070f90) {
 580                 address = arm11_nextpc(arm11, 0, address + 4);
 581                 LOG_DEBUG("Skipping WFI %08" PRIx32, address);
 582         }
 583         /* ignore B to self */
 584         else if ((next_instruction & 0xFEFFFFFF) == 0xeafffffe)
 585                 LOG_DEBUG("Not stepping jump to self");
 586         else {
 587                 /** \todo TODO: check if break-/watchpoints make any sense at all in combination
 588                 * with this. */
 589
 590                 /** \todo TODO: check if disabling IRQs might be a good idea here. Alternatively
 591                 * the VCR might be something worth looking into. */
 592
 593
 594                 /* Set up breakpoint for stepping */
 595
 596                 struct arm11_sc7_action brp[2];
 597
 598                 brp[0].write    = 1;
 599                 brp[0].address  = ARM11_SC7_BVR0;
 600                 brp[1].write    = 1;
 601                 brp[1].address  = ARM11_SC7_BCR0;
 602
 603                 if (arm11->hardware_step) {
 604                         /* Hardware single stepping ("instruction address
 605                          * mismatch") is used if enabled.  It's not quite
 606                          * exactly "run one instruction"; "branch to here"
 607                          * loops won't break, neither will some other cases,
 608                          * but it's probably the best default.
 609                          *
 610                          * Hardware single stepping isn't supported on v6
 611                          * debug modules.  ARM1176 and v7 can support it...
 612                          *
 613                          * FIXME Thumb stepping likely needs to use 0x03
 614                          * or 0xc0 byte masks, not 0x0f.
 615                          */
 616                         brp[0].value   = address;
 617                         brp[1].value   = 0x1 | (3 << 1) | (0x0F << 5)
 618                                 | (0 << 14) | (0 << 16) | (0 << 20)
 619                                 | (2 << 21);
 620                 } else {
 621                         /* Sets a breakpoint on the next PC, as calculated
 622                          * by instruction set simulation.
 623                          *
 624                          * REVISIT stepping Thumb on ARM1156 requires Thumb2
 625                          * support from the simulator.
 626                          */
 627                         uint32_t next_pc;
 628                         int retval;
 629
 630                         retval = arm_simulate_step(target, &next_pc);
 631                         if (retval != ERROR_OK)
 632                                 return retval;
 633
 634                         brp[0].value    = next_pc;
 635                         brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5)
 636                                 | (0 << 14) | (0 << 16) | (0 << 20)
 637                                 | (0 << 21);
 638                 }
 639
 640                 CHECK_RETVAL(arm11_sc7_run(arm11, brp, ARRAY_SIZE(brp)));
 641
 642                 /* resume */
 643
 644
 645                 if (arm11->step_irq_enable)
 646                         /* this disable should be redundant ... */
 647                         arm11->dscr &= ~DSCR_INT_DIS;
 648                 else
 649                         arm11->dscr |= DSCR_INT_DIS;
 650
 651
 652                 CHECK_RETVAL(arm11_leave_debug_state(arm11, handle_breakpoints));
 653
 654                 arm11_add_IR(arm11, ARM11_RESTART, TAP_IDLE);
 655
 656                 CHECK_RETVAL(jtag_execute_queue());
 657
 658                 /* wait for halt */
 659                 int i = 0;
 660
 661                 while (1) {
 662                         const uint32_t mask = DSCR_CORE_RESTARTED
 663                                 | DSCR_CORE_HALTED;
 664
 665                         CHECK_RETVAL(arm11_read_DSCR(arm11));
 666                         LOG_DEBUG("DSCR %08x e", (unsigned) arm11->dscr);
 667
 668                         if ((arm11->dscr & mask) == mask)
 669                                 break;
 670
 671                         long long then = 0;
 672                         if (i == 1000)
 673                                 then = timeval_ms();
 674                         if (i >= 1000) {
 675                                 if ((timeval_ms()-then) > 1000) {
 676                                         LOG_WARNING(
 677                                                 "Timeout (1000ms) waiting for instructions to complete");
 678                                         return ERROR_FAIL;
 679                                 }
 680                         }
 681                         i++;
 682                 }
 683
 684                 /* clear breakpoint */
 685                 CHECK_RETVAL(arm11_sc7_clear_vbw(arm11));
 686
 687                 /* save state */
 688                 CHECK_RETVAL(arm11_debug_entry(arm11));
 689
 690                 /* restore default state */
 691                 arm11->dscr &= ~DSCR_INT_DIS;
 692
 693         }
 694
 695         target->debug_reason = DBG_REASON_SINGLESTEP;
 696
 697         CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_HALTED));
 698
 699         return ERROR_OK;
 700 }
 701
 702 static int arm11_assert_reset(struct target *target)
 703 {
 704         struct arm11_common *arm11 = target_to_arm11(target);
 705
 706         /* optionally catch reset vector */
 707         if (target->reset_halt && !(arm11->vcr & 1))
 708                 CHECK_RETVAL(arm11_sc7_set_vcr(arm11, arm11->vcr | 1));
 709
 710         /* Issue some kind of warm reset. */
 711         if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
 712                 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
 713         else if (jtag_get_reset_config() & RESET_HAS_SRST) {
 714                 /* REVISIT handle "pulls" cases, if there's
 715                  * hardware that needs them to work.
 716                  */
 717                 jtag_add_reset(0, 1);
 718         } else {
 719                 LOG_ERROR("%s: how to reset?", target_name(target));
 720                 return ERROR_FAIL;
 721         }
 722
 723         /* registers are now invalid */
 724         register_cache_invalidate(arm11->arm.core_cache);
 725
 726         target->state = TARGET_RESET;
 727
 728         return ERROR_OK;
 729 }
 730
 731 /*
 732  * - There is another bug in the arm11 core.  (iMX31 specific again?)
 733  *   When you generate an access to external logic (for example DDR
 734  *   controller via AHB bus) and that block is not configured (perhaps
 735  *   it is still held in reset), that transaction will never complete.
 736  *   This will hang arm11 core but it will also hang JTAG controller.
 737  *   Nothing short of srst assertion will bring it out of this.
 738  */
 739
 740 static int arm11_deassert_reset(struct target *target)
 741 {
 742         struct arm11_common *arm11 = target_to_arm11(target);
 743         int retval;
 744
 745         /* be certain SRST is off */
 746         jtag_add_reset(0, 0);
 747
 748         /* WORKAROUND i.MX31 problems:  SRST goofs the TAP, and resets
 749          * at least DSCR.  OMAP24xx doesn't show that problem, though
 750          * SRST-only reset seems to be problematic for other reasons.
 751          * (Secure boot sequences being one likelihood!)
 752          */
 753         jtag_add_tlr();
 754
 755         CHECK_RETVAL(arm11_poll(target));
 756
 757         if (target->reset_halt) {
 758                 if (target->state != TARGET_HALTED) {
 759                         LOG_WARNING("%s: ran after reset and before halt ...",
 760                                 target_name(target));
 761                         retval = target_halt(target);
 762                         if (retval != ERROR_OK)
 763                                 return retval;
 764                 }
 765         }
 766
 767         /* maybe restore vector catch config */
 768         if (target->reset_halt && !(arm11->vcr & 1))
 769                 CHECK_RETVAL(arm11_sc7_set_vcr(arm11, arm11->vcr));
 770
 771         return ERROR_OK;
 772 }
 773
 774 /* target memory access
 775  * size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
 776  * count: number of items of <size>
 777  *
 778  * arm11_config_memrw_no_increment - in the future we may want to be able
 779  * to read/write a range of data to a "port". a "port" is an action on
 780  * read memory address for some peripheral.
 781  */
 782 static int arm11_read_memory_inner(struct target *target,
 783         uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer,
 784         bool arm11_config_memrw_no_increment)
 785 {
 786         /** \todo TODO: check if buffer cast to uint32_t* and uint16_t* might cause alignment
 787          *problems */
 788         int retval;
 789
 790         if (target->state != TARGET_HALTED) {
 791                 LOG_WARNING("target was not halted");
 792                 return ERROR_TARGET_NOT_HALTED;
 793         }
 794
 795         LOG_DEBUG("ADDR %08" PRIx32 "  SIZE %08" PRIx32 "  COUNT %08" PRIx32 "",
 796                 address,
 797                 size,
 798                 count);
 799
 800         struct arm11_common *arm11 = target_to_arm11(target);
 801
 802         retval = arm11_run_instr_data_prepare(arm11);
 803         if (retval != ERROR_OK)
 804                 return retval;
 805
 806         /* MRC p14,0,r0,c0,c5,0 */
 807         retval = arm11_run_instr_data_to_core1(arm11, 0xee100e15, address);
 808         if (retval != ERROR_OK)
 809                 return retval;
 810
 811         switch (size) {
 812                 case 1:
 813                         arm11->arm.core_cache->reg_list[1].dirty = true;
 814
 815                         for (size_t i = 0; i < count; i++) {
 816                                 /* ldrb    r1, [r0], #1 */
 817                                 /* ldrb    r1, [r0] */
 818                                 CHECK_RETVAL(arm11_run_instr_no_data1(arm11,
 819                                                 !arm11_config_memrw_no_increment ? 0xe4d01001 : 0xe5d01000));
 820
 821                                 uint32_t res;
 822                                 /* MCR p14,0,R1,c0,c5,0 */
 823                                 CHECK_RETVAL(arm11_run_instr_data_from_core(arm11, 0xEE001E15, &res, 1));
 824
 825                                 *buffer++ = res;
 826                         }
 827
 828                         break;
 829
 830                 case 2:
 831                 {
 832                         arm11->arm.core_cache->reg_list[1].dirty = true;
 833
 834                         for (size_t i = 0; i < count; i++) {
 835                                 /* ldrh    r1, [r0], #2 */
 836                                 CHECK_RETVAL(arm11_run_instr_no_data1(arm11,
 837                                                 !arm11_config_memrw_no_increment ? 0xe0d010b2 : 0xe1d010b0));
 838
 839                                 uint32_t res;
 840
 841                                 /* MCR p14,0,R1,c0,c5,0 */
 842                                 CHECK_RETVAL(arm11_run_instr_data_from_core(arm11, 0xEE001E15, &res, 1));
 843
 844                                 uint16_t svalue = res;
 845                                 memcpy(buffer + i * sizeof(uint16_t), &svalue, sizeof(uint16_t));
 846                         }
 847
 848                         break;
 849                 }
 850
 851                 case 4:
 852                 {
 853                         uint32_t instr = !arm11_config_memrw_no_increment ? 0xecb05e01 : 0xed905e00;
 854                         /** \todo TODO: buffer cast to uint32_t* causes alignment warnings */
 855                         uint32_t *words = (uint32_t *)(void *)buffer;
 856
 857                         /* LDC p14,c5,[R0],#4 */
 858                         /* LDC p14,c5,[R0] */
 859                         CHECK_RETVAL(arm11_run_instr_data_from_core(arm11, instr, words, count));
 860                         break;
 861                 }
 862         }
 863
 864         return arm11_run_instr_data_finish(arm11);
 865 }
 866
 867 static int arm11_read_memory(struct target *target,
 868         uint32_t address,
 869         uint32_t size,
 870         uint32_t count,
 871         uint8_t *buffer)
 872 {
 873         return arm11_read_memory_inner(target, address, size, count, buffer, false);
 874 }
 875
 876 /*
 877 * no_increment - in the future we may want to be able
 878 * to read/write a range of data to a "port". a "port" is an action on
 879 * read memory address for some peripheral.
 880 */
 881 static int arm11_write_memory_inner(struct target *target,
 882         uint32_t address, uint32_t size,
 883         uint32_t count, const uint8_t *buffer,
 884         bool no_increment)
 885 {
 886         int retval;
 887
 888         if (target->state != TARGET_HALTED) {
 889                 LOG_WARNING("target was not halted");
 890                 return ERROR_TARGET_NOT_HALTED;
 891         }
 892
 893         LOG_DEBUG("ADDR %08" PRIx32 "  SIZE %08" PRIx32 "  COUNT %08" PRIx32 "",
 894                 address,
 895                 size,
 896                 count);
 897
 898         struct arm11_common *arm11 = target_to_arm11(target);
 899
 900         retval = arm11_run_instr_data_prepare(arm11);
 901         if (retval != ERROR_OK)
 902                 return retval;
 903
 904         /* load r0 with buffer address
 905          * MRC p14,0,r0,c0,c5,0 */
 906         retval = arm11_run_instr_data_to_core1(arm11, 0xee100e15, address);
 907         if (retval != ERROR_OK)
 908                 return retval;
 909
 910         /* burst writes are not used for single words as those may well be
 911          * reset init script writes.
 912          *
 913          * The other advantage is that as burst writes are default, we'll
 914          * now exercise both burst and non-burst code paths with the
 915          * default settings, increasing code coverage.
 916          */
 917         bool burst = arm11->memwrite_burst && (count > 1);
 918
 919         switch (size) {
 920                 case 1:
 921                 {
 922                         arm11->arm.core_cache->reg_list[1].dirty = true;
 923
 924                         for (size_t i = 0; i < count; i++) {
 925                                 /* load r1 from DCC with byte data */
 926                                 /* MRC p14,0,r1,c0,c5,0 */
 927                                 retval = arm11_run_instr_data_to_core1(arm11, 0xee101e15, *buffer++);
 928                                 if (retval != ERROR_OK)
 929                                         return retval;
 930
 931                                 /* write r1 to memory */
 932                                 /* strb    r1, [r0], #1 */
 933                                 /* strb    r1, [r0] */
 934                                 retval = arm11_run_instr_no_data1(arm11,
 935                                                 !no_increment ? 0xe4c01001 : 0xe5c01000);
 936                                 if (retval != ERROR_OK)
 937                                         return retval;
 938                         }
 939
 940                         break;
 941                 }
 942
 943                 case 2:
 944                 {
 945                         arm11->arm.core_cache->reg_list[1].dirty = true;
 946
 947                         for (size_t i = 0; i < count; i++) {
 948                                 uint16_t value;
 949                                 memcpy(&value, buffer + i * sizeof(uint16_t), sizeof(uint16_t));
 950
 951                                 /* load r1 from DCC with halfword data */
 952                                 /* MRC p14,0,r1,c0,c5,0 */
 953                                 retval = arm11_run_instr_data_to_core1(arm11, 0xee101e15, value);
 954                                 if (retval != ERROR_OK)
 955                                         return retval;
 956
 957                                 /* write r1 to memory */
 958                                 /* strh    r1, [r0], #2 */
 959                                 /* strh    r1, [r0] */
 960                                 retval = arm11_run_instr_no_data1(arm11,
 961                                                 !no_increment ? 0xe0c010b2 : 0xe1c010b0);
 962                                 if (retval != ERROR_OK)
 963                                         return retval;
 964                         }
 965
 966                         break;
 967                 }
 968
 969                 case 4: {
 970                         /* stream word data through DCC directly to memory */
 971                         /* increment:           STC p14,c5,[R0],#4 */
 972                         /* no increment:        STC p14,c5,[R0]*/
 973                         uint32_t instr = !no_increment ? 0xeca05e01 : 0xed805e00;
 974
 975                         /** \todo TODO: buffer cast to uint32_t* causes alignment warnings */
 976                         uint32_t *words = (uint32_t *)(void *)buffer;
 977
 978                         /* "burst" here just means trusting each instruction executes
 979                          * fully before we run the next one:  per-word roundtrips, to
 980                          * check the Ready flag, are not used.
 981                          */
 982                         if (!burst)
 983                                 retval = arm11_run_instr_data_to_core(arm11,
 984                                                 instr, words, count);
 985                         else
 986                                 retval = arm11_run_instr_data_to_core_noack(arm11,
 987                                                 instr, words, count);
 988                         if (retval != ERROR_OK)
 989                                 return retval;
 990
 991                         break;
 992                 }
 993         }
 994
 995         /* r0 verification */
 996         if (!no_increment) {
 997                 uint32_t r0;
 998
 999                 /* MCR p14,0,R0,c0,c5,0 */
1000                 retval = arm11_run_instr_data_from_core(arm11, 0xEE000E15, &r0, 1);
1001                 if (retval != ERROR_OK)
1002                         return retval;
1003
1004                 if (address + size * count != r0) {
1005                         LOG_ERROR("Data transfer failed. Expected end "
1006                                 "address 0x%08x, got 0x%08x",
1007                                 (unsigned) (address + size * count),
1008                                 (unsigned) r0);
1009
1010                         if (burst)
1011                                 LOG_ERROR(
1012                                         "use 'arm11 memwrite burst disable' to disable fast burst mode");
1013
1014
1015                         if (arm11->memwrite_error_fatal)
1016                                 return ERROR_FAIL;
1017                 }
1018         }
1019
1020         return arm11_run_instr_data_finish(arm11);
1021 }
1022
1023 static int arm11_write_memory(struct target *target,
1024         uint32_t address, uint32_t size,
1025         uint32_t count, const uint8_t *buffer)
1026 {
1027         /* pointer increment matters only for multi-unit writes ...
1028          * not e.g. to a "reset the chip" controller.
1029          */
1030         return arm11_write_memory_inner(target, address, size,
1031                 count, buffer, count == 1);
1032 }
1033
1034 /* target break-/watchpoint control
1035 * rw: 0 = write, 1 = read, 2 = access
1036 */
1037 static int arm11_add_breakpoint(struct target *target,
1038         struct breakpoint *breakpoint)
1039 {
1040         struct arm11_common *arm11 = target_to_arm11(target);
1041
1042 #if 0
1043         if (breakpoint->type == BKPT_SOFT) {
1044                 LOG_INFO("sw breakpoint requested, but software breakpoints not enabled");
1045                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1046         }
1047 #endif
1048
1049         if (!arm11->free_brps) {
1050                 LOG_DEBUG("no breakpoint unit available for hardware breakpoint");
1051                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1052         }
1053
1054         if (breakpoint->length != 4) {
1055                 LOG_DEBUG("only breakpoints of four bytes length supported");
1056                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1057         }
1058
1059         arm11->free_brps--;
1060
1061         return ERROR_OK;
1062 }
1063
1064 static int arm11_remove_breakpoint(struct target *target,
1065         struct breakpoint *breakpoint)
1066 {
1067         struct arm11_common *arm11 = target_to_arm11(target);
1068
1069         arm11->free_brps++;
1070
1071         return ERROR_OK;
1072 }
1073
1074 static int arm11_target_create(struct target *target, Jim_Interp *interp)
1075 {
1076         struct arm11_common *arm11;
1077
1078         if (target->tap == NULL)
1079                 return ERROR_FAIL;
1080
1081         if (target->tap->ir_length != 5) {
1082                 LOG_ERROR("'target arm11' expects IR LENGTH = 5");
1083                 return ERROR_COMMAND_SYNTAX_ERROR;
1084         }
1085
1086         arm11 = calloc(1, sizeof *arm11);
1087         if (!arm11)
1088                 return ERROR_FAIL;
1089
1090         arm11->arm.core_type = ARM_MODE_ANY;
1091         arm_init_arch_info(target, &arm11->arm);
1092
1093         arm11->jtag_info.tap = target->tap;
1094         arm11->jtag_info.scann_size = 5;
1095         arm11->jtag_info.scann_instr = ARM11_SCAN_N;
1096         arm11->jtag_info.cur_scan_chain = ~0;   /* invalid/unknown */
1097         arm11->jtag_info.intest_instr = ARM11_INTEST;
1098
1099         arm11->memwrite_burst = true;
1100         arm11->memwrite_error_fatal = true;
1101
1102         return ERROR_OK;
1103 }
1104
1105 static int arm11_init_target(struct command_context *cmd_ctx,
1106         struct target *target)
1107 {
1108         /* Initialize anything we can set up without talking to the target */
1109         return ERROR_OK;
1110 }
1111
1112 /* talk to the target and set things up */
1113 static int arm11_examine(struct target *target)
1114 {
1115         int retval;
1116         char *type;
1117         struct arm11_common *arm11 = target_to_arm11(target);
1118         uint32_t didr, device_id;
1119         uint8_t implementor;
1120
1121         /* FIXME split into do-first-time and do-every-time logic ... */
1122
1123         /* check IDCODE */
1124
1125         arm11_add_IR(arm11, ARM11_IDCODE, ARM11_TAP_DEFAULT);
1126
1127         struct scan_field idcode_field;
1128
1129         arm11_setup_field(arm11, 32, NULL, &device_id, &idcode_field);
1130
1131         arm11_add_dr_scan_vc(arm11->arm.target->tap, 1, &idcode_field, TAP_DRPAUSE);
1132
1133         /* check DIDR */
1134
1135         arm11_add_debug_SCAN_N(arm11, 0x00, ARM11_TAP_DEFAULT);
1136
1137         arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
1138
1139         struct scan_field chain0_fields[2];
1140
1141         arm11_setup_field(arm11, 32, NULL, &didr, chain0_fields + 0);
1142         arm11_setup_field(arm11,  8, NULL, &implementor, chain0_fields + 1);
1143
1144         arm11_add_dr_scan_vc(arm11->arm.target->tap, ARRAY_SIZE(
1145                         chain0_fields), chain0_fields, TAP_IDLE);
1146
1147         CHECK_RETVAL(jtag_execute_queue());
1148
1149         /* assume the manufacturer id is ok; check the part # */
1150         switch ((device_id >> 12) & 0xFFFF) {
1151                 case 0x7B36:
1152                         type = "ARM1136";
1153                         break;
1154                 case 0x7B37:
1155                         type = "ARM11 MPCore";
1156                         break;
1157                 case 0x7B56:
1158                         type = "ARM1156";
1159                         break;
1160                 case 0x7B76:
1161                         arm11->arm.core_type = ARM_MODE_MON;
1162                         /* NOTE: could default arm11->hardware_step to true */
1163                         type = "ARM1176";
1164                         break;
1165                 default:
1166                         LOG_ERROR("unexpected ARM11 ID code");
1167                         return ERROR_FAIL;
1168         }
1169         LOG_INFO("found %s", type);
1170
1171         /* unlikely this could ever fail, but ... */
1172         switch ((didr >> 16) & 0x0F) {
1173                 case ARM11_DEBUG_V6:
1174                 case ARM11_DEBUG_V61:   /* supports security extensions */
1175                         break;
1176                 default:
1177                         LOG_ERROR("Only ARM v6 and v6.1 debug supported.");
1178                         return ERROR_FAIL;
1179         }
1180
1181         arm11->brp = ((didr >> 24) & 0x0F) + 1;
1182
1183         /** \todo TODO: reserve one brp slot if we allow breakpoints during step */
1184         arm11->free_brps = arm11->brp;
1185
1186         LOG_DEBUG("IDCODE %08" PRIx32 " IMPLEMENTOR %02x DIDR %08" PRIx32,
1187                 device_id, implementor, didr);
1188
1189         /* as a side-effect this reads DSCR and thus
1190          * clears the ARM11_DSCR_STICKY_PRECISE_DATA_ABORT / Sticky Precise Data Abort Flag
1191          * as suggested by the spec.
1192          */
1193
1194         retval = arm11_check_init(arm11);
1195         if (retval != ERROR_OK)
1196                 return retval;
1197
1198         /* Build register cache "late", after target_init(), since we
1199          * want to know if this core supports Secure Monitor mode.
1200          */
1201         if (!target_was_examined(target))
1202                 CHECK_RETVAL(arm11_dpm_init(arm11, didr));
1203
1204         /* ETM on ARM11 still uses original scanchain 6 access mode */
1205         if (arm11->arm.etm && !target_was_examined(target)) {
1206                 *register_get_last_cache_p(&target->reg_cache) =
1207                         etm_build_reg_cache(target, &arm11->jtag_info,
1208                                 arm11->arm.etm);
1209                 CHECK_RETVAL(etm_setup(target));
1210         }
1211
1212         target_set_examined(target);
1213
1214         return ERROR_OK;
1215 }
1216
1217 #define ARM11_BOOL_WRAPPER(name, print_name)    \
1218         COMMAND_HANDLER(arm11_handle_bool_ ## name) \
1219         { \
1220                 struct target *target = get_current_target(CMD_CTX); \
1221                 struct arm11_common *arm11 = target_to_arm11(target); \
1222                 \
1223                 return CALL_COMMAND_HANDLER(handle_command_parse_bool, \
1224                         &arm11->name, print_name); \
1225         }
1226
1227 ARM11_BOOL_WRAPPER(memwrite_burst, "memory write burst mode")
1228 ARM11_BOOL_WRAPPER(memwrite_error_fatal, "fatal error mode for memory writes")
1229 ARM11_BOOL_WRAPPER(step_irq_enable, "IRQs while stepping")
1230 ARM11_BOOL_WRAPPER(hardware_step, "hardware single step")
1231
1232 /* REVISIT handle the VCR bits like other ARMs:  use symbols for
1233  * input and output values.
1234  */
1235
1236 COMMAND_HANDLER(arm11_handle_vcr)
1237 {
1238         struct target *target = get_current_target(CMD_CTX);
1239         struct arm11_common *arm11 = target_to_arm11(target);
1240
1241         switch (CMD_ARGC) {
1242                 case 0:
1243                         break;
1244                 case 1:
1245                         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], arm11->vcr);
1246                         break;
1247                 default:
1248                         return ERROR_COMMAND_SYNTAX_ERROR;
1249         }
1250
1251         LOG_INFO("VCR 0x%08" PRIx32 "", arm11->vcr);
1252         return ERROR_OK;
1253 }
1254
1255 static const struct command_registration arm11_mw_command_handlers[] = {
1256         {
1257                 .name = "burst",
1258                 .handler = arm11_handle_bool_memwrite_burst,
1259                 .mode = COMMAND_ANY,
1260                 .help = "Display or modify flag controlling potentially "
1261                         "risky fast burst mode (default: enabled)",
1262                 .usage = "['enable'|'disable']",
1263         },
1264         {
1265                 .name = "error_fatal",
1266                 .handler = arm11_handle_bool_memwrite_error_fatal,
1267                 .mode = COMMAND_ANY,
1268                 .help = "Display or modify flag controlling transfer "
1269                         "termination on transfer errors"
1270                         " (default: enabled)",
1271                 .usage = "['enable'|'disable']",
1272         },
1273         COMMAND_REGISTRATION_DONE
1274 };
1275 static const struct command_registration arm11_any_command_handlers[] = {
1276         {
1277                 /* "hardware_step" is only here to check if the default
1278                  * simulate + breakpoint implementation is broken.
1279                  * TEMPORARY! NOT DOCUMENTED! */
1280                 .name = "hardware_step",
1281                 .handler = arm11_handle_bool_hardware_step,
1282                 .mode = COMMAND_ANY,
1283                 .help = "DEBUG ONLY - Hardware single stepping"
1284                         " (default: disabled)",
1285                 .usage = "['enable'|'disable']",
1286         },
1287         {
1288                 .name = "memwrite",
1289                 .mode = COMMAND_ANY,
1290                 .help = "memwrite command group",
1291                 .usage = "",
1292                 .chain = arm11_mw_command_handlers,
1293         },
1294         {
1295                 .name = "step_irq_enable",
1296                 .handler = arm11_handle_bool_step_irq_enable,
1297                 .mode = COMMAND_ANY,
1298                 .help = "Display or modify flag controlling interrupt "
1299                         "enable while stepping (default: disabled)",
1300                 .usage = "['enable'|'disable']",
1301         },
1302         {
1303                 .name = "vcr",
1304                 .handler = arm11_handle_vcr,
1305                 .mode = COMMAND_ANY,
1306                 .help = "Display or modify Vector Catch Register",
1307                 .usage = "[value]",
1308         },
1309         COMMAND_REGISTRATION_DONE
1310 };
1311
1312 static const struct command_registration arm11_command_handlers[] = {
1313         {
1314                 .chain = arm_command_handlers,
1315         },
1316         {
1317                 .chain = etm_command_handlers,
1318         },
1319         {
1320                 .name = "arm11",
1321                 .mode = COMMAND_ANY,
1322                 .help = "ARM11 command group",
1323                 .usage = "",
1324                 .chain = arm11_any_command_handlers,
1325         },
1326         COMMAND_REGISTRATION_DONE
1327 };
1328
1329 /** Holds methods for ARM11xx targets. */
1330 struct target_type arm11_target = {
1331         .name = "arm11",
1332
1333         .poll = arm11_poll,
1334         .arch_state = arm11_arch_state,
1335
1336         .target_request_data = arm11_target_request_data,
1337
1338         .halt = arm11_halt,
1339         .resume = arm11_resume,
1340         .step = arm11_step,
1341
1342         .assert_reset = arm11_assert_reset,
1343         .deassert_reset = arm11_deassert_reset,
1344
1345         .get_gdb_reg_list = arm_get_gdb_reg_list,
1346
1347         .read_memory = arm11_read_memory,
1348         .write_memory = arm11_write_memory,
1349
1350         .checksum_memory = arm_checksum_memory,
1351         .blank_check_memory = arm_blank_check_memory,
1352
1353         .add_breakpoint = arm11_add_breakpoint,
1354         .remove_breakpoint = arm11_remove_breakpoint,
1355
1356         .run_algorithm = armv4_5_run_algorithm,
1357
1358         .commands = arm11_command_handlers,
1359         .target_create = arm11_target_create,
1360         .init_target = arm11_init_target,
1361         .examine = arm11_examine,
1362 };