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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  *   This program is free software; you can redistribute it and/or modify  *
  10  *   it under the terms of the GNU General Public License as published by  *
  11  *   the Free Software Foundation; either version 2 of the License, or     *
  12  *   (at your option) any later version.                                   *
  13  *                                                                         *
  14  *   This program is distributed in the hope that it will be useful,       *
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  17  *   GNU General Public License for more details.                          *
  18  *                                                                         *
  19  *   You should have received a copy of the GNU General Public License     *
  20  *   along with this program; if not, write to the                         *
  21  *   Free Software Foundation, Inc.,                                       *
  22  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  23  ***************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include "arm11.h"
  30 #include "armv4_5.h"
  31 #include "arm_simulator.h"
  32 #include "time_support.h"
  33 #include "target_type.h"
  34
  35
  36 #if 0
  37 #define _DEBUG_INSTRUCTION_EXECUTION_
  38 #endif
  39
  40 #if 0
  41 #define FNC_INFO        LOG_DEBUG("-")
  42 #else
  43 #define FNC_INFO
  44 #endif
  45
  46 #if 1
  47 #define FNC_INFO_NOTIMPLEMENTED do { LOG_DEBUG("NOT IMPLEMENTED"); /*exit(-1);*/ } while (0)
  48 #else
  49 #define FNC_INFO_NOTIMPLEMENTED
  50 #endif
  51
  52 static int arm11_on_enter_debug_state(arm11_common_t * arm11);
  53
  54 bool    arm11_config_memwrite_burst                             = true;
  55 bool    arm11_config_memwrite_error_fatal               = true;
  56 uint32_t                arm11_vcr                                                               = 0;
  57 bool    arm11_config_step_irq_enable                    = false;
  58 bool    arm11_config_hardware_step                              = false;
  59
  60 #define ARM11_HANDLER(x)        \
  61         .x                              = arm11_##x
  62
  63 target_type_t arm11_target =
  64 {
  65         .name                   = "arm11",
  66
  67         ARM11_HANDLER(poll),
  68         ARM11_HANDLER(arch_state),
  69
  70         ARM11_HANDLER(target_request_data),
  71
  72         ARM11_HANDLER(halt),
  73         ARM11_HANDLER(resume),
  74         ARM11_HANDLER(step),
  75
  76         ARM11_HANDLER(assert_reset),
  77         ARM11_HANDLER(deassert_reset),
  78         ARM11_HANDLER(soft_reset_halt),
  79
  80         ARM11_HANDLER(get_gdb_reg_list),
  81
  82         ARM11_HANDLER(read_memory),
  83         ARM11_HANDLER(write_memory),
  84
  85         ARM11_HANDLER(bulk_write_memory),
  86
  87         ARM11_HANDLER(checksum_memory),
  88
  89         ARM11_HANDLER(add_breakpoint),
  90         ARM11_HANDLER(remove_breakpoint),
  91         ARM11_HANDLER(add_watchpoint),
  92         ARM11_HANDLER(remove_watchpoint),
  93
  94         ARM11_HANDLER(run_algorithm),
  95
  96         ARM11_HANDLER(register_commands),
  97         ARM11_HANDLER(target_create),
  98         ARM11_HANDLER(init_target),
  99         ARM11_HANDLER(examine),
 100         ARM11_HANDLER(quit),
 101 };
 102
 103 int arm11_regs_arch_type = -1;
 104
 105
 106 enum arm11_regtype
 107 {
 108         ARM11_REGISTER_CORE,
 109         ARM11_REGISTER_CPSR,
 110
 111         ARM11_REGISTER_FX,
 112         ARM11_REGISTER_FPS,
 113
 114         ARM11_REGISTER_FIQ,
 115         ARM11_REGISTER_SVC,
 116         ARM11_REGISTER_ABT,
 117         ARM11_REGISTER_IRQ,
 118         ARM11_REGISTER_UND,
 119         ARM11_REGISTER_MON,
 120
 121         ARM11_REGISTER_SPSR_FIQ,
 122         ARM11_REGISTER_SPSR_SVC,
 123         ARM11_REGISTER_SPSR_ABT,
 124         ARM11_REGISTER_SPSR_IRQ,
 125         ARM11_REGISTER_SPSR_UND,
 126         ARM11_REGISTER_SPSR_MON,
 127
 128         /* debug regs */
 129         ARM11_REGISTER_DSCR,
 130         ARM11_REGISTER_WDTR,
 131         ARM11_REGISTER_RDTR,
 132 };
 133
 134
 135 typedef struct arm11_reg_defs_s
 136 {
 137         char *                                  name;
 138         uint32_t                                                num;
 139         int                                             gdb_num;
 140         enum arm11_regtype              type;
 141 } arm11_reg_defs_t;
 142
 143 /* update arm11_regcache_ids when changing this */
 144 static const arm11_reg_defs_t arm11_reg_defs[] =
 145 {
 146         {"r0",  0,      0,      ARM11_REGISTER_CORE},
 147         {"r1",  1,      1,      ARM11_REGISTER_CORE},
 148         {"r2",  2,      2,      ARM11_REGISTER_CORE},
 149         {"r3",  3,      3,      ARM11_REGISTER_CORE},
 150         {"r4",  4,      4,      ARM11_REGISTER_CORE},
 151         {"r5",  5,      5,      ARM11_REGISTER_CORE},
 152         {"r6",  6,      6,      ARM11_REGISTER_CORE},
 153         {"r7",  7,      7,      ARM11_REGISTER_CORE},
 154         {"r8",  8,      8,      ARM11_REGISTER_CORE},
 155         {"r9",  9,      9,      ARM11_REGISTER_CORE},
 156         {"r10", 10,     10,     ARM11_REGISTER_CORE},
 157         {"r11", 11,     11,     ARM11_REGISTER_CORE},
 158         {"r12", 12,     12,     ARM11_REGISTER_CORE},
 159         {"sp",  13,     13,     ARM11_REGISTER_CORE},
 160         {"lr",  14,     14,     ARM11_REGISTER_CORE},
 161         {"pc",  15,     15,     ARM11_REGISTER_CORE},
 162
 163 #if ARM11_REGCACHE_FREGS
 164         {"f0",  0,      16,     ARM11_REGISTER_FX},
 165         {"f1",  1,      17,     ARM11_REGISTER_FX},
 166         {"f2",  2,      18,     ARM11_REGISTER_FX},
 167         {"f3",  3,      19,     ARM11_REGISTER_FX},
 168         {"f4",  4,      20,     ARM11_REGISTER_FX},
 169         {"f5",  5,      21,     ARM11_REGISTER_FX},
 170         {"f6",  6,      22,     ARM11_REGISTER_FX},
 171         {"f7",  7,      23,     ARM11_REGISTER_FX},
 172         {"fps", 0,      24,     ARM11_REGISTER_FPS},
 173 #endif
 174
 175         {"cpsr",        0,      25,     ARM11_REGISTER_CPSR},
 176
 177 #if ARM11_REGCACHE_MODEREGS
 178         {"r8_fiq",      8,      -1,     ARM11_REGISTER_FIQ},
 179         {"r9_fiq",      9,      -1,     ARM11_REGISTER_FIQ},
 180         {"r10_fiq",     10,     -1,     ARM11_REGISTER_FIQ},
 181         {"r11_fiq",     11,     -1,     ARM11_REGISTER_FIQ},
 182         {"r12_fiq",     12,     -1,     ARM11_REGISTER_FIQ},
 183         {"r13_fiq",     13,     -1,     ARM11_REGISTER_FIQ},
 184         {"r14_fiq",     14,     -1,     ARM11_REGISTER_FIQ},
 185         {"spsr_fiq", 0, -1,     ARM11_REGISTER_SPSR_FIQ},
 186
 187         {"r13_svc",     13,     -1,     ARM11_REGISTER_SVC},
 188         {"r14_svc",     14,     -1,     ARM11_REGISTER_SVC},
 189         {"spsr_svc", 0, -1,     ARM11_REGISTER_SPSR_SVC},
 190
 191         {"r13_abt",     13,     -1,     ARM11_REGISTER_ABT},
 192         {"r14_abt",     14,     -1,     ARM11_REGISTER_ABT},
 193         {"spsr_abt", 0, -1,     ARM11_REGISTER_SPSR_ABT},
 194
 195         {"r13_irq",     13,     -1,     ARM11_REGISTER_IRQ},
 196         {"r14_irq",     14,     -1,     ARM11_REGISTER_IRQ},
 197         {"spsr_irq", 0, -1,     ARM11_REGISTER_SPSR_IRQ},
 198
 199         {"r13_und",     13,     -1,     ARM11_REGISTER_UND},
 200         {"r14_und",     14,     -1,     ARM11_REGISTER_UND},
 201         {"spsr_und", 0, -1,     ARM11_REGISTER_SPSR_UND},
 202
 203         /* ARM1176 only */
 204         {"r13_mon",     13,     -1,     ARM11_REGISTER_MON},
 205         {"r14_mon",     14,     -1,     ARM11_REGISTER_MON},
 206         {"spsr_mon", 0, -1,     ARM11_REGISTER_SPSR_MON},
 207 #endif
 208
 209         /* Debug Registers */
 210         {"dscr",        0,      -1,     ARM11_REGISTER_DSCR},
 211         {"wdtr",        0,      -1,     ARM11_REGISTER_WDTR},
 212         {"rdtr",        0,      -1,     ARM11_REGISTER_RDTR},
 213 };
 214
 215 enum arm11_regcache_ids
 216 {
 217         ARM11_RC_R0,
 218         ARM11_RC_RX                     = ARM11_RC_R0,
 219
 220         ARM11_RC_R1,
 221         ARM11_RC_R2,
 222         ARM11_RC_R3,
 223         ARM11_RC_R4,
 224         ARM11_RC_R5,
 225         ARM11_RC_R6,
 226         ARM11_RC_R7,
 227         ARM11_RC_R8,
 228         ARM11_RC_R9,
 229         ARM11_RC_R10,
 230         ARM11_RC_R11,
 231         ARM11_RC_R12,
 232         ARM11_RC_R13,
 233         ARM11_RC_SP                     = ARM11_RC_R13,
 234         ARM11_RC_R14,
 235         ARM11_RC_LR                     = ARM11_RC_R14,
 236         ARM11_RC_R15,
 237         ARM11_RC_PC                     = ARM11_RC_R15,
 238
 239 #if ARM11_REGCACHE_FREGS
 240         ARM11_RC_F0,
 241         ARM11_RC_FX                     = ARM11_RC_F0,
 242         ARM11_RC_F1,
 243         ARM11_RC_F2,
 244         ARM11_RC_F3,
 245         ARM11_RC_F4,
 246         ARM11_RC_F5,
 247         ARM11_RC_F6,
 248         ARM11_RC_F7,
 249         ARM11_RC_FPS,
 250 #endif
 251
 252         ARM11_RC_CPSR,
 253
 254 #if ARM11_REGCACHE_MODEREGS
 255         ARM11_RC_R8_FIQ,
 256         ARM11_RC_R9_FIQ,
 257         ARM11_RC_R10_FIQ,
 258         ARM11_RC_R11_FIQ,
 259         ARM11_RC_R12_FIQ,
 260         ARM11_RC_R13_FIQ,
 261         ARM11_RC_R14_FIQ,
 262         ARM11_RC_SPSR_FIQ,
 263
 264         ARM11_RC_R13_SVC,
 265         ARM11_RC_R14_SVC,
 266         ARM11_RC_SPSR_SVC,
 267
 268         ARM11_RC_R13_ABT,
 269         ARM11_RC_R14_ABT,
 270         ARM11_RC_SPSR_ABT,
 271
 272         ARM11_RC_R13_IRQ,
 273         ARM11_RC_R14_IRQ,
 274         ARM11_RC_SPSR_IRQ,
 275
 276         ARM11_RC_R13_UND,
 277         ARM11_RC_R14_UND,
 278         ARM11_RC_SPSR_UND,
 279
 280         ARM11_RC_R13_MON,
 281         ARM11_RC_R14_MON,
 282         ARM11_RC_SPSR_MON,
 283 #endif
 284
 285         ARM11_RC_DSCR,
 286         ARM11_RC_WDTR,
 287         ARM11_RC_RDTR,
 288
 289         ARM11_RC_MAX,
 290 };
 291
 292 #define ARM11_GDB_REGISTER_COUNT        26
 293
 294 uint8_t arm11_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 295
 296 reg_t arm11_gdb_dummy_fp_reg =
 297 {
 298         "GDB dummy floating-point register", arm11_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
 299 };
 300
 301 uint8_t arm11_gdb_dummy_fps_value[] = {0, 0, 0, 0};
 302
 303 reg_t arm11_gdb_dummy_fps_reg =
 304 {
 305         "GDB dummy floating-point status register", arm11_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
 306 };
 307
 308
 309
 310 /** Check and if necessary take control of the system
 311  *
 312  * \param arm11         Target state variable.
 313  * \param dscr          If the current DSCR content is
 314  *                                      available a pointer to a word holding the
 315  *                                      DSCR can be passed. Otherwise use NULL.
 316  */
 317 int arm11_check_init(arm11_common_t * arm11, uint32_t * dscr)
 318 {
 319         FNC_INFO;
 320
 321         uint32_t                        dscr_local_tmp_copy;
 322
 323         if (!dscr)
 324         {
 325                 dscr = &dscr_local_tmp_copy;
 326
 327                 CHECK_RETVAL(arm11_read_DSCR(arm11, dscr));
 328         }
 329
 330         if (!(*dscr & ARM11_DSCR_MODE_SELECT))
 331         {
 332                 LOG_DEBUG("Bringing target into debug mode");
 333
 334                 *dscr |= ARM11_DSCR_MODE_SELECT;                /* Halt debug-mode */
 335                 arm11_write_DSCR(arm11, *dscr);
 336
 337                 /* add further reset initialization here */
 338
 339                 arm11->simulate_reset_on_next_halt = true;
 340
 341                 if (*dscr & ARM11_DSCR_CORE_HALTED)
 342                 {
 343                         /** \todo TODO: this needs further scrutiny because
 344                           * arm11_on_enter_debug_state() never gets properly called.
 345                           * As a result we don't read the actual register states from
 346                           * the target.
 347                           */
 348
 349                         arm11->target->state    = TARGET_HALTED;
 350                         arm11->target->debug_reason     = arm11_get_DSCR_debug_reason(*dscr);
 351                 }
 352                 else
 353                 {
 354                         arm11->target->state    = TARGET_RUNNING;
 355                         arm11->target->debug_reason     = DBG_REASON_NOTHALTED;
 356                 }
 357
 358                 arm11_sc7_clear_vbw(arm11);
 359         }
 360
 361         return ERROR_OK;
 362 }
 363
 364
 365
 366 #define R(x) \
 367         (arm11->reg_values[ARM11_RC_##x])
 368
 369 /** Save processor state.
 370   *
 371   * This is called when the HALT instruction has succeeded
 372   * or on other occasions that stop the processor.
 373   *
 374   */
 375 static int arm11_on_enter_debug_state(arm11_common_t * arm11)
 376 {
 377         int retval;
 378         FNC_INFO;
 379
 380         for (size_t i = 0; i < asizeof(arm11->reg_values); i++)
 381         {
 382                 arm11->reg_list[i].valid        = 1;
 383                 arm11->reg_list[i].dirty        = 0;
 384         }
 385
 386         /* Save DSCR */
 387         CHECK_RETVAL(arm11_read_DSCR(arm11, &R(DSCR)));
 388
 389         /* Save wDTR */
 390
 391         if (R(DSCR) & ARM11_DSCR_WDTR_FULL)
 392         {
 393                 arm11_add_debug_SCAN_N(arm11, 0x05, ARM11_TAP_DEFAULT);
 394
 395                 arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
 396
 397                 scan_field_t    chain5_fields[3];
 398
 399                 arm11_setup_field(arm11, 32, NULL, &R(WDTR),    chain5_fields + 0);
 400                 arm11_setup_field(arm11,  1, NULL, NULL,                chain5_fields + 1);
 401                 arm11_setup_field(arm11,  1, NULL, NULL,                chain5_fields + 2);
 402
 403                 arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_DRPAUSE);
 404         }
 405         else
 406         {
 407                 arm11->reg_list[ARM11_RC_WDTR].valid    = 0;
 408         }
 409
 410
 411         /* DSCR: set ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE */
 412         /* ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode", but not to issue ITRs
 413            ARM1136 seems to require this to issue ITR's as well */
 414
 415         uint32_t new_dscr = R(DSCR) | ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE;
 416
 417         /* this executes JTAG queue: */
 418
 419         arm11_write_DSCR(arm11, new_dscr);
 420
 421
 422         /* From the spec:
 423            Before executing any instruction in debug state you have to drain the write buffer.
 424            This ensures that no imprecise Data Aborts can return at a later point:*/
 425
 426         /** \todo TODO: Test drain write buffer. */
 427
 428 #if 0
 429         while (1)
 430         {
 431                 /* MRC p14,0,R0,c5,c10,0 */
 432                 //      arm11_run_instr_no_data1(arm11, /*0xee150e1a*/0xe320f000);
 433
 434                 /* mcr     15, 0, r0, cr7, cr10, {4} */
 435                 arm11_run_instr_no_data1(arm11, 0xee070f9a);
 436
 437                 uint32_t dscr = arm11_read_DSCR(arm11);
 438
 439                 LOG_DEBUG("DRAIN, DSCR %08x", dscr);
 440
 441                 if (dscr & ARM11_DSCR_STICKY_IMPRECISE_DATA_ABORT)
 442                 {
 443                         arm11_run_instr_no_data1(arm11, 0xe320f000);
 444
 445                         dscr = arm11_read_DSCR(arm11);
 446
 447                         LOG_DEBUG("DRAIN, DSCR %08x (DONE)", dscr);
 448
 449                         break;
 450                 }
 451         }
 452 #endif
 453
 454         retval = arm11_run_instr_data_prepare(arm11);
 455         if (retval != ERROR_OK)
 456                 return retval;
 457
 458         /* save r0 - r14 */
 459
 460         /** \todo TODO: handle other mode registers */
 461
 462         for (size_t i = 0; i < 15; i++)
 463         {
 464                 /* MCR p14,0,R?,c0,c5,0 */
 465                 retval = arm11_run_instr_data_from_core(arm11, 0xEE000E15 | (i << 12), &R(RX + i), 1);
 466                 if (retval != ERROR_OK)
 467                         return retval;
 468         }
 469
 470         /* save rDTR */
 471
 472         /* check rDTRfull in DSCR */
 473
 474         if (R(DSCR) & ARM11_DSCR_RDTR_FULL)
 475         {
 476                 /* MRC p14,0,R0,c0,c5,0 (move rDTR -> r0 (-> wDTR -> local var)) */
 477                 retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xEE100E15, &R(RDTR));
 478                 if (retval != ERROR_OK)
 479                         return retval;
 480         }
 481         else
 482         {
 483                 arm11->reg_list[ARM11_RC_RDTR].valid    = 0;
 484         }
 485
 486         /* save CPSR */
 487
 488         /* MRS r0,CPSR (move CPSR -> r0 (-> wDTR -> local var)) */
 489         retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE10F0000, &R(CPSR));
 490         if (retval != ERROR_OK)
 491                 return retval;
 492
 493         /* save PC */
 494
 495         /* MOV R0,PC (move PC -> r0 (-> wDTR -> local var)) */
 496         retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE1A0000F, &R(PC));
 497         if (retval != ERROR_OK)
 498                 return retval;
 499
 500         /* adjust PC depending on ARM state */
 501
 502         if (R(CPSR) & ARM11_CPSR_J)     /* Java state */
 503         {
 504                 arm11->reg_values[ARM11_RC_PC] -= 0;
 505         }
 506         else if (R(CPSR) & ARM11_CPSR_T)        /* Thumb state */
 507         {
 508                 arm11->reg_values[ARM11_RC_PC] -= 4;
 509         }
 510         else                                    /* ARM state */
 511         {
 512                 arm11->reg_values[ARM11_RC_PC] -= 8;
 513         }
 514
 515         if (arm11->simulate_reset_on_next_halt)
 516         {
 517                 arm11->simulate_reset_on_next_halt = false;
 518
 519                 LOG_DEBUG("Reset c1 Control Register");
 520
 521                 /* Write 0 (reset value) to Control register 0 to disable MMU/Cache etc. */
 522
 523                 /* MCR p15,0,R0,c1,c0,0 */
 524                 retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xee010f10, 0);
 525                 if (retval != ERROR_OK)
 526                         return retval;
 527
 528         }
 529
 530         retval = arm11_run_instr_data_finish(arm11);
 531         if (retval != ERROR_OK)
 532                 return retval;
 533
 534         arm11_dump_reg_changes(arm11);
 535
 536         return ERROR_OK;
 537 }
 538
 539 void arm11_dump_reg_changes(arm11_common_t * arm11)
 540 {
 541
 542         if (!(debug_level >= LOG_LVL_DEBUG))
 543         {
 544                 return;
 545         }
 546
 547         for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
 548         {
 549                 if (!arm11->reg_list[i].valid)
 550                 {
 551                         if (arm11->reg_history[i].valid)
 552                                 LOG_DEBUG("%8s INVALID   (%08" PRIx32 ")", arm11_reg_defs[i].name, arm11->reg_history[i].value);
 553                 }
 554                 else
 555                 {
 556                         if (arm11->reg_history[i].valid)
 557                         {
 558                                 if (arm11->reg_history[i].value != arm11->reg_values[i])
 559                                         LOG_DEBUG("%8s %08" PRIx32 " (%08" PRIx32 ")", arm11_reg_defs[i].name, arm11->reg_values[i], arm11->reg_history[i].value);
 560                         }
 561                         else
 562                         {
 563                                 LOG_DEBUG("%8s %08" PRIx32 " (INVALID)", arm11_reg_defs[i].name, arm11->reg_values[i]);
 564                         }
 565                 }
 566         }
 567 }
 568
 569 /** Restore processor state
 570   *
 571   * This is called in preparation for the RESTART function.
 572   *
 573   */
 574 int arm11_leave_debug_state(arm11_common_t * arm11)
 575 {
 576         FNC_INFO;
 577         int retval;
 578
 579         retval = arm11_run_instr_data_prepare(arm11);
 580         if (retval != ERROR_OK)
 581                 return retval;
 582
 583         /** \todo TODO: handle other mode registers */
 584
 585         /* restore R1 - R14 */
 586
 587         for (size_t i = 1; i < 15; i++)
 588         {
 589                 if (!arm11->reg_list[ARM11_RC_RX + i].dirty)
 590                         continue;
 591
 592                 /* MRC p14,0,r?,c0,c5,0 */
 593                 arm11_run_instr_data_to_core1(arm11, 0xee100e15 | (i << 12), R(RX + i));
 594
 595                 //      LOG_DEBUG("RESTORE R" ZU " %08x", i, R(RX + i));
 596         }
 597
 598         retval = arm11_run_instr_data_finish(arm11);
 599         if (retval != ERROR_OK)
 600                 return retval;
 601
 602         /* spec says clear wDTR and rDTR; we assume they are clear as
 603            otherwise our programming would be sloppy */
 604         {
 605                 uint32_t DSCR;
 606
 607                 CHECK_RETVAL(arm11_read_DSCR(arm11, &DSCR));
 608
 609                 if (DSCR & (ARM11_DSCR_RDTR_FULL | ARM11_DSCR_WDTR_FULL))
 610                 {
 611                         /*
 612                         The wDTR/rDTR two registers that are used to send/receive data to/from
 613                         the core in tandem with corresponding instruction codes that are
 614                         written into the core. The RDTR FULL/WDTR FULL flag indicates that the
 615                         registers hold data that was written by one side (CPU or JTAG) and not
 616                         read out by the other side.
 617                         */
 618                         LOG_ERROR("wDTR/rDTR inconsistent (DSCR %08" PRIx32 ")", DSCR);
 619                         return ERROR_FAIL;
 620                 }
 621         }
 622
 623         retval = arm11_run_instr_data_prepare(arm11);
 624         if (retval != ERROR_OK)
 625                 return retval;
 626
 627         /* restore original wDTR */
 628
 629         if ((R(DSCR) & ARM11_DSCR_WDTR_FULL) || arm11->reg_list[ARM11_RC_WDTR].dirty)
 630         {
 631                 /* MCR p14,0,R0,c0,c5,0 */
 632                 retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xee000e15, R(WDTR));
 633                 if (retval != ERROR_OK)
 634                         return retval;
 635         }
 636
 637         /* restore CPSR */
 638
 639         /* MSR CPSR,R0*/
 640         retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe129f000, R(CPSR));
 641         if (retval != ERROR_OK)
 642                 return retval;
 643
 644
 645         /* restore PC */
 646
 647         /* MOV PC,R0 */
 648         retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe1a0f000, R(PC));
 649         if (retval != ERROR_OK)
 650                 return retval;
 651
 652
 653         /* restore R0 */
 654
 655         /* MRC p14,0,r0,c0,c5,0 */
 656         arm11_run_instr_data_to_core1(arm11, 0xee100e15, R(R0));
 657
 658         retval = arm11_run_instr_data_finish(arm11);
 659         if (retval != ERROR_OK)
 660                 return retval;
 661
 662         /* restore DSCR */
 663
 664         arm11_write_DSCR(arm11, R(DSCR));
 665
 666         /* restore rDTR */
 667
 668         if (R(DSCR) & ARM11_DSCR_RDTR_FULL || arm11->reg_list[ARM11_RC_RDTR].dirty)
 669         {
 670                 arm11_add_debug_SCAN_N(arm11, 0x05, ARM11_TAP_DEFAULT);
 671
 672                 arm11_add_IR(arm11, ARM11_EXTEST, ARM11_TAP_DEFAULT);
 673
 674                 scan_field_t    chain5_fields[3];
 675
 676                 uint8_t                 Ready           = 0;    /* ignored */
 677                 uint8_t                 Valid           = 0;    /* ignored */
 678
 679                 arm11_setup_field(arm11, 32, &R(RDTR),  NULL, chain5_fields + 0);
 680                 arm11_setup_field(arm11,  1, &Ready,    NULL, chain5_fields + 1);
 681                 arm11_setup_field(arm11,  1, &Valid,    NULL, chain5_fields + 2);
 682
 683                 arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_DRPAUSE);
 684         }
 685
 686         arm11_record_register_history(arm11);
 687
 688         return ERROR_OK;
 689 }
 690
 691 void arm11_record_register_history(arm11_common_t * arm11)
 692 {
 693         for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
 694         {
 695                 arm11->reg_history[i].value     = arm11->reg_values[i];
 696                 arm11->reg_history[i].valid     = arm11->reg_list[i].valid;
 697
 698                 arm11->reg_list[i].valid        = 0;
 699                 arm11->reg_list[i].dirty        = 0;
 700         }
 701 }
 702
 703
 704 /* poll current target status */
 705 int arm11_poll(struct target_s *target)
 706 {
 707         FNC_INFO;
 708         int retval;
 709
 710         arm11_common_t * arm11 = target->arch_info;
 711
 712         uint32_t        dscr;
 713
 714         CHECK_RETVAL(arm11_read_DSCR(arm11, &dscr));
 715
 716         LOG_DEBUG("DSCR %08" PRIx32 "", dscr);
 717
 718         CHECK_RETVAL(arm11_check_init(arm11, &dscr));
 719
 720         if (dscr & ARM11_DSCR_CORE_HALTED)
 721         {
 722                 if (target->state != TARGET_HALTED)
 723                 {
 724                         enum target_state old_state = target->state;
 725
 726                         LOG_DEBUG("enter TARGET_HALTED");
 727                         target->state                   = TARGET_HALTED;
 728                         target->debug_reason    = arm11_get_DSCR_debug_reason(dscr);
 729                         retval = arm11_on_enter_debug_state(arm11);
 730                         if (retval != ERROR_OK)
 731                                 return retval;
 732
 733                         target_call_event_callbacks(target,
 734                                 old_state == TARGET_DEBUG_RUNNING ? TARGET_EVENT_DEBUG_HALTED : TARGET_EVENT_HALTED);
 735                 }
 736         }
 737         else
 738         {
 739                 if (target->state != TARGET_RUNNING && target->state != TARGET_DEBUG_RUNNING)
 740                 {
 741                         LOG_DEBUG("enter TARGET_RUNNING");
 742                         target->state                   = TARGET_RUNNING;
 743                         target->debug_reason    = DBG_REASON_NOTHALTED;
 744                 }
 745         }
 746
 747         return ERROR_OK;
 748 }
 749 /* architecture specific status reply */
 750 int arm11_arch_state(struct target_s *target)
 751 {
 752         arm11_common_t * arm11 = target->arch_info;
 753
 754         LOG_USER("target halted due to %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
 755                          Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
 756                          R(CPSR),
 757                          R(PC));
 758
 759         return ERROR_OK;
 760 }
 761
 762 /* target request support */
 763 int arm11_target_request_data(struct target_s *target, uint32_t size, uint8_t *buffer)
 764 {
 765         FNC_INFO_NOTIMPLEMENTED;
 766
 767         return ERROR_OK;
 768 }
 769
 770 /* target execution control */
 771 int arm11_halt(struct target_s *target)
 772 {
 773         FNC_INFO;
 774
 775         arm11_common_t * arm11 = target->arch_info;
 776
 777         LOG_DEBUG("target->state: %s",
 778                 target_state_name(target));
 779
 780         if (target->state == TARGET_UNKNOWN)
 781         {
 782                 arm11->simulate_reset_on_next_halt = true;
 783         }
 784
 785         if (target->state == TARGET_HALTED)
 786         {
 787                 LOG_DEBUG("target was already halted");
 788                 return ERROR_OK;
 789         }
 790
 791         arm11_add_IR(arm11, ARM11_HALT, TAP_IDLE);
 792
 793         CHECK_RETVAL(jtag_execute_queue());
 794
 795         uint32_t dscr;
 796
 797         int i = 0;
 798         while (1)
 799         {
 800                 CHECK_RETVAL(arm11_read_DSCR(arm11, &dscr));
 801
 802                 if (dscr & ARM11_DSCR_CORE_HALTED)
 803                         break;
 804
 805
 806                 long long then = 0;
 807                 if (i == 1000)
 808                 {
 809                         then = timeval_ms();
 810                 }
 811                 if (i >= 1000)
 812                 {
 813                         if ((timeval_ms()-then) > 1000)
 814                         {
 815                                 LOG_WARNING("Timeout (1000ms) waiting for instructions to complete");
 816                                 return ERROR_FAIL;
 817                         }
 818                 }
 819                 i++;
 820         }
 821
 822         arm11_on_enter_debug_state(arm11);
 823
 824         enum target_state old_state     = target->state;
 825
 826         target->state           = TARGET_HALTED;
 827         target->debug_reason    = arm11_get_DSCR_debug_reason(dscr);
 828
 829         CHECK_RETVAL(
 830                 target_call_event_callbacks(target,
 831                         old_state == TARGET_DEBUG_RUNNING ? TARGET_EVENT_DEBUG_HALTED : TARGET_EVENT_HALTED));
 832
 833         return ERROR_OK;
 834 }
 835
 836 int arm11_resume(struct target_s *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
 837 {
 838         FNC_INFO;
 839
 840         //        LOG_DEBUG("current %d  address %08x  handle_breakpoints %d  debug_execution %d",
 841         //      current, address, handle_breakpoints, debug_execution);
 842
 843         arm11_common_t * arm11 = target->arch_info;
 844
 845         LOG_DEBUG("target->state: %s",
 846                 target_state_name(target));
 847
 848
 849         if (target->state != TARGET_HALTED)
 850         {
 851                 LOG_ERROR("Target not halted");
 852                 return ERROR_TARGET_NOT_HALTED;
 853         }
 854
 855         if (!current)
 856                 R(PC) = address;
 857
 858         LOG_DEBUG("RESUME PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
 859
 860         /* clear breakpoints/watchpoints and VCR*/
 861         arm11_sc7_clear_vbw(arm11);
 862
 863         /* Set up breakpoints */
 864         if (!debug_execution)
 865         {
 866                 /* check if one matches PC and step over it if necessary */
 867
 868                 breakpoint_t *  bp;
 869
 870                 for (bp = target->breakpoints; bp; bp = bp->next)
 871                 {
 872                         if (bp->address == R(PC))
 873                         {
 874                                 LOG_DEBUG("must step over %08" PRIx32 "", bp->address);
 875                                 arm11_step(target, 1, 0, 0);
 876                                 break;
 877                         }
 878                 }
 879
 880                 /* set all breakpoints */
 881
 882                 size_t          brp_num = 0;
 883
 884                 for (bp = target->breakpoints; bp; bp = bp->next)
 885                 {
 886                         arm11_sc7_action_t      brp[2];
 887
 888                         brp[0].write    = 1;
 889                         brp[0].address  = ARM11_SC7_BVR0 + brp_num;
 890                         brp[0].value    = bp->address;
 891                         brp[1].write    = 1;
 892                         brp[1].address  = ARM11_SC7_BCR0 + brp_num;
 893                         brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
 894
 895                         arm11_sc7_run(arm11, brp, asizeof(brp));
 896
 897                         LOG_DEBUG("Add BP " ZU " at %08" PRIx32 "", brp_num, bp->address);
 898
 899                         brp_num++;
 900                 }
 901
 902                 arm11_sc7_set_vcr(arm11, arm11_vcr);
 903         }
 904
 905         arm11_leave_debug_state(arm11);
 906
 907         arm11_add_IR(arm11, ARM11_RESTART, TAP_IDLE);
 908
 909         CHECK_RETVAL(jtag_execute_queue());
 910
 911         int i = 0;
 912         while (1)
 913         {
 914                 uint32_t dscr;
 915
 916                 CHECK_RETVAL(arm11_read_DSCR(arm11, &dscr));
 917
 918                 LOG_DEBUG("DSCR %08" PRIx32 "", dscr);
 919
 920                 if (dscr & ARM11_DSCR_CORE_RESTARTED)
 921                         break;
 922
 923
 924                 long long then = 0;
 925                 if (i == 1000)
 926                 {
 927                         then = timeval_ms();
 928                 }
 929                 if (i >= 1000)
 930                 {
 931                         if ((timeval_ms()-then) > 1000)
 932                         {
 933                                 LOG_WARNING("Timeout (1000ms) waiting for instructions to complete");
 934                                 return ERROR_FAIL;
 935                         }
 936                 }
 937                 i++;
 938         }
 939
 940         if (!debug_execution)
 941         {
 942                 target->state                   = TARGET_RUNNING;
 943                 target->debug_reason    = DBG_REASON_NOTHALTED;
 944
 945                 CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_RESUMED));
 946         }
 947         else
 948         {
 949                 target->state                   = TARGET_DEBUG_RUNNING;
 950                 target->debug_reason    = DBG_REASON_NOTHALTED;
 951
 952                 CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_RESUMED));
 953         }
 954
 955         return ERROR_OK;
 956 }
 957
 958
 959 static int armv4_5_to_arm11(int reg)
 960 {
 961         if (reg < 16)
 962                 return reg;
 963         switch (reg)
 964         {
 965         case ARMV4_5_CPSR:
 966                 return ARM11_RC_CPSR;
 967         case 16:
 968                 /* FIX!!! handle thumb better! */
 969                 return ARM11_RC_CPSR;
 970         default:
 971                 LOG_ERROR("BUG: register translation from armv4_5 to arm11 not supported %d", reg);
 972                 exit(-1);
 973         }
 974 }
 975
 976
 977 static uint32_t arm11_sim_get_reg(struct arm_sim_interface *sim, int reg)
 978 {
 979         arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
 980
 981         reg=armv4_5_to_arm11(reg);
 982
 983         return buf_get_u32(arm11->reg_list[reg].value, 0, 32);
 984 }
 985
 986 static void arm11_sim_set_reg(struct arm_sim_interface *sim, int reg, uint32_t value)
 987 {
 988         arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
 989
 990         reg=armv4_5_to_arm11(reg);
 991
 992         buf_set_u32(arm11->reg_list[reg].value, 0, 32, value);
 993 }
 994
 995 static uint32_t arm11_sim_get_cpsr(struct arm_sim_interface *sim, int pos, int bits)
 996 {
 997         arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
 998
 999         return buf_get_u32(arm11->reg_list[ARM11_RC_CPSR].value, pos, bits);
1000 }
1001
1002 static enum armv4_5_state arm11_sim_get_state(struct arm_sim_interface *sim)
1003 {
1004 //      arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
1005
1006         /* FIX!!!! we should implement thumb for arm11 */
1007         return ARMV4_5_STATE_ARM;
1008 }
1009
1010 static void arm11_sim_set_state(struct arm_sim_interface *sim, enum armv4_5_state mode)
1011 {
1012 //      arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
1013
1014         /* FIX!!!! we should implement thumb for arm11 */
1015         LOG_ERROR("Not implemetned!");
1016 }
1017
1018
1019 static enum armv4_5_mode arm11_sim_get_mode(struct arm_sim_interface *sim)
1020 {
1021         //arm11_common_t * arm11 = (arm11_common_t *)sim->user_data;
1022
1023         /* FIX!!!! we should implement something that returns the current mode here!!! */
1024         return ARMV4_5_MODE_USR;
1025 }
1026
1027 static int arm11_simulate_step(target_t *target, uint32_t *dry_run_pc)
1028 {
1029         struct arm_sim_interface sim;
1030
1031         sim.user_data=target->arch_info;
1032         sim.get_reg=&arm11_sim_get_reg;
1033         sim.set_reg=&arm11_sim_set_reg;
1034         sim.get_reg_mode=&arm11_sim_get_reg;
1035         sim.set_reg_mode=&arm11_sim_set_reg;
1036         sim.get_cpsr=&arm11_sim_get_cpsr;
1037         sim.get_mode=&arm11_sim_get_mode;
1038         sim.get_state=&arm11_sim_get_state;
1039         sim.set_state=&arm11_sim_set_state;
1040
1041         return arm_simulate_step_core(target, dry_run_pc, &sim);
1042
1043 }
1044
1045 int arm11_step(struct target_s *target, int current, uint32_t address, int handle_breakpoints)
1046 {
1047         FNC_INFO;
1048
1049         LOG_DEBUG("target->state: %s",
1050                 target_state_name(target));
1051
1052         if (target->state != TARGET_HALTED)
1053         {
1054                 LOG_WARNING("target was not halted");
1055                 return ERROR_TARGET_NOT_HALTED;
1056         }
1057
1058         arm11_common_t * arm11 = target->arch_info;
1059
1060         if (!current)
1061                 R(PC) = address;
1062
1063         LOG_DEBUG("STEP PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
1064
1065
1066         /** \todo TODO: Thumb not supported here */
1067
1068         uint32_t        next_instruction;
1069
1070         CHECK_RETVAL(arm11_read_memory_word(arm11, R(PC), &next_instruction));
1071
1072         /* skip over BKPT */
1073         if ((next_instruction & 0xFFF00070) == 0xe1200070)
1074         {
1075                 R(PC) += 4;
1076                 arm11->reg_list[ARM11_RC_PC].valid = 1;
1077                 arm11->reg_list[ARM11_RC_PC].dirty = 0;
1078                 LOG_DEBUG("Skipping BKPT");
1079         }
1080         /* skip over Wait for interrupt / Standby */
1081         /* mcr  15, 0, r?, cr7, cr0, {4} */
1082         else if ((next_instruction & 0xFFFF0FFF) == 0xee070f90)
1083         {
1084                 R(PC) += 4;
1085                 arm11->reg_list[ARM11_RC_PC].valid = 1;
1086                 arm11->reg_list[ARM11_RC_PC].dirty = 0;
1087                 LOG_DEBUG("Skipping WFI");
1088         }
1089         /* ignore B to self */
1090         else if ((next_instruction & 0xFEFFFFFF) == 0xeafffffe)
1091         {
1092                 LOG_DEBUG("Not stepping jump to self");
1093         }
1094         else
1095         {
1096                 /** \todo TODO: check if break-/watchpoints make any sense at all in combination
1097                 * with this. */
1098
1099                 /** \todo TODO: check if disabling IRQs might be a good idea here. Alternatively
1100                 * the VCR might be something worth looking into. */
1101
1102
1103                 /* Set up breakpoint for stepping */
1104
1105                 arm11_sc7_action_t      brp[2];
1106
1107                 brp[0].write    = 1;
1108                 brp[0].address  = ARM11_SC7_BVR0;
1109                 brp[1].write    = 1;
1110                 brp[1].address  = ARM11_SC7_BCR0;
1111
1112                 if (arm11_config_hardware_step)
1113                 {
1114                         /* hardware single stepping be used if possible or is it better to
1115                          * always use the same code path? Hardware single stepping is not supported
1116                          * on all hardware
1117                          */
1118                          brp[0].value   = R(PC);
1119                          brp[1].value   = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (2 << 21);
1120                 } else
1121                 {
1122                         /* sets a breakpoint on the next PC(calculated by simulation),
1123                          */
1124                         uint32_t next_pc;
1125                         int retval;
1126                         retval = arm11_simulate_step(target, &next_pc);
1127                         if (retval != ERROR_OK)
1128                                 return retval;
1129
1130                         brp[0].value    = next_pc;
1131                         brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
1132                 }
1133
1134                 CHECK_RETVAL(arm11_sc7_run(arm11, brp, asizeof(brp)));
1135
1136                 /* resume */
1137
1138
1139                 if (arm11_config_step_irq_enable)
1140                         R(DSCR) &= ~ARM11_DSCR_INTERRUPTS_DISABLE;              /* should be redundant */
1141                 else
1142                         R(DSCR) |= ARM11_DSCR_INTERRUPTS_DISABLE;
1143
1144
1145                 CHECK_RETVAL(arm11_leave_debug_state(arm11));
1146
1147                 arm11_add_IR(arm11, ARM11_RESTART, TAP_IDLE);
1148
1149                 CHECK_RETVAL(jtag_execute_queue());
1150
1151                 /* wait for halt */
1152                 int i = 0;
1153                 while (1)
1154                 {
1155                         uint32_t dscr;
1156
1157                         CHECK_RETVAL(arm11_read_DSCR(arm11, &dscr));
1158
1159                         LOG_DEBUG("DSCR %08" PRIx32 "e", dscr);
1160
1161                         if ((dscr & (ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED)) ==
1162                                 (ARM11_DSCR_CORE_RESTARTED | ARM11_DSCR_CORE_HALTED))
1163                                 break;
1164
1165                         long long then = 0;
1166                         if (i == 1000)
1167                         {
1168                                 then = timeval_ms();
1169                         }
1170                         if (i >= 1000)
1171                         {
1172                                 if ((timeval_ms()-then) > 1000)
1173                                 {
1174                                         LOG_WARNING("Timeout (1000ms) waiting for instructions to complete");
1175                                         return ERROR_FAIL;
1176                                 }
1177                         }
1178                         i++;
1179                 }
1180
1181                 /* clear breakpoint */
1182                 arm11_sc7_clear_vbw(arm11);
1183
1184                 /* save state */
1185                 CHECK_RETVAL(arm11_on_enter_debug_state(arm11));
1186
1187             /* restore default state */
1188                 R(DSCR) &= ~ARM11_DSCR_INTERRUPTS_DISABLE;
1189
1190         }
1191
1192         //        target->state         = TARGET_HALTED;
1193         target->debug_reason    = DBG_REASON_SINGLESTEP;
1194
1195         CHECK_RETVAL(target_call_event_callbacks(target, TARGET_EVENT_HALTED));
1196
1197         return ERROR_OK;
1198 }
1199
1200 int arm11_assert_reset(target_t *target)
1201 {
1202         FNC_INFO;
1203
1204         /* FIX! we really should assert srst here, but
1205          * how do we reset the target into the halted state?
1206          *
1207          * Also arm11 behaves "funny" when srst is asserted
1208          * (as of writing the rules are not understood).
1209          */
1210         if (target->reset_halt)
1211         {
1212                 CHECK_RETVAL(target_halt(target));
1213         }
1214
1215         return ERROR_OK;
1216 }
1217
1218 int arm11_deassert_reset(target_t *target)
1219 {
1220         return ERROR_OK;
1221 }
1222
1223 int arm11_soft_reset_halt(struct target_s *target)
1224 {
1225         FNC_INFO_NOTIMPLEMENTED;
1226
1227         return ERROR_OK;
1228 }
1229
1230 /* target register access for gdb */
1231 int arm11_get_gdb_reg_list(struct target_s *target, struct reg_s **reg_list[], int *reg_list_size)
1232 {
1233         FNC_INFO;
1234
1235         arm11_common_t * arm11 = target->arch_info;
1236
1237         *reg_list_size  = ARM11_GDB_REGISTER_COUNT;
1238         *reg_list               = malloc(sizeof(reg_t*) * ARM11_GDB_REGISTER_COUNT);
1239
1240         for (size_t i = 16; i < 24; i++)
1241         {
1242                 (*reg_list)[i] = &arm11_gdb_dummy_fp_reg;
1243         }
1244
1245         (*reg_list)[24] = &arm11_gdb_dummy_fps_reg;
1246
1247         for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
1248         {
1249                 if (arm11_reg_defs[i].gdb_num == -1)
1250                         continue;
1251
1252                 (*reg_list)[arm11_reg_defs[i].gdb_num] = arm11->reg_list + i;
1253         }
1254
1255         return ERROR_OK;
1256 }
1257
1258 /* target memory access
1259  * size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
1260  * count: number of items of <size>
1261  *
1262  * arm11_config_memrw_no_increment - in the future we may want to be able
1263  * to read/write a range of data to a "port". a "port" is an action on
1264  * read memory address for some peripheral.
1265  */
1266 int arm11_read_memory_inner(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer,
1267                 bool arm11_config_memrw_no_increment)
1268 {
1269         /** \todo TODO: check if buffer cast to uint32_t* and uint16_t* might cause alignment problems */
1270         int retval;
1271
1272         FNC_INFO;
1273
1274         if (target->state != TARGET_HALTED)
1275         {
1276                 LOG_WARNING("target was not halted");
1277                 return ERROR_TARGET_NOT_HALTED;
1278         }
1279
1280         LOG_DEBUG("ADDR %08" PRIx32 "  SIZE %08" PRIx32 "  COUNT %08" PRIx32 "", address, size, count);
1281
1282         arm11_common_t * arm11 = target->arch_info;
1283
1284         retval = arm11_run_instr_data_prepare(arm11);
1285         if (retval != ERROR_OK)
1286                 return retval;
1287
1288         /* MRC p14,0,r0,c0,c5,0 */
1289         retval = arm11_run_instr_data_to_core1(arm11, 0xee100e15, address);
1290         if (retval != ERROR_OK)
1291                 return retval;
1292
1293         switch (size)
1294         {
1295         case 1:
1296                 /** \todo TODO: check if dirty is the right choice to force a rewrite on arm11_resume() */
1297                 arm11->reg_list[ARM11_RC_R1].dirty = 1;
1298
1299                 for (size_t i = 0; i < count; i++)
1300                 {
1301                         /* ldrb    r1, [r0], #1 */
1302                         /* ldrb    r1, [r0] */
1303                         arm11_run_instr_no_data1(arm11,
1304                                         !arm11_config_memrw_no_increment ? 0xe4d01001 : 0xe5d01000);
1305
1306                         uint32_t res;
1307                         /* MCR p14,0,R1,c0,c5,0 */
1308                         arm11_run_instr_data_from_core(arm11, 0xEE001E15, &res, 1);
1309
1310                         *buffer++ = res;
1311                 }
1312
1313                 break;
1314
1315         case 2:
1316                 {
1317                         arm11->reg_list[ARM11_RC_R1].dirty = 1;
1318
1319                         for (size_t i = 0; i < count; i++)
1320                         {
1321                                 /* ldrh    r1, [r0], #2 */
1322                                 arm11_run_instr_no_data1(arm11,
1323                                         !arm11_config_memrw_no_increment ? 0xe0d010b2 : 0xe1d010b0);
1324
1325                                 uint32_t res;
1326
1327                                 /* MCR p14,0,R1,c0,c5,0 */
1328                                 arm11_run_instr_data_from_core(arm11, 0xEE001E15, &res, 1);
1329
1330                                 uint16_t svalue = res;
1331                                 memcpy(buffer + i * sizeof(uint16_t), &svalue, sizeof(uint16_t));
1332                         }
1333
1334                         break;
1335                 }
1336
1337         case 4:
1338                 {
1339                 uint32_t instr = !arm11_config_memrw_no_increment ? 0xecb05e01 : 0xed905e00;
1340                 /** \todo TODO: buffer cast to uint32_t* causes alignment warnings */
1341                 uint32_t *words = (uint32_t *)buffer;
1342
1343                 /* LDC p14,c5,[R0],#4 */
1344                 /* LDC p14,c5,[R0] */
1345                 arm11_run_instr_data_from_core(arm11, instr, words, count);
1346                 break;
1347                 }
1348         }
1349
1350         return arm11_run_instr_data_finish(arm11);
1351 }
1352
1353 int arm11_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
1354 {
1355         return arm11_read_memory_inner(target, address, size, count, buffer, false);
1356 }
1357
1358 /*
1359 * arm11_config_memrw_no_increment - in the future we may want to be able
1360 * to read/write a range of data to a "port". a "port" is an action on
1361 * read memory address for some peripheral.
1362 */
1363 int arm11_write_memory_inner(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer,
1364                 bool arm11_config_memrw_no_increment)
1365 {
1366         int retval;
1367         FNC_INFO;
1368
1369         if (target->state != TARGET_HALTED)
1370         {
1371                 LOG_WARNING("target was not halted");
1372                 return ERROR_TARGET_NOT_HALTED;
1373         }
1374
1375         LOG_DEBUG("ADDR %08" PRIx32 "  SIZE %08" PRIx32 "  COUNT %08" PRIx32 "", address, size, count);
1376
1377         arm11_common_t * arm11 = target->arch_info;
1378
1379         retval = arm11_run_instr_data_prepare(arm11);
1380         if (retval != ERROR_OK)
1381                 return retval;
1382
1383         /* MRC p14,0,r0,c0,c5,0 */
1384         retval = arm11_run_instr_data_to_core1(arm11, 0xee100e15, address);
1385         if (retval != ERROR_OK)
1386                 return retval;
1387
1388         /* burst writes are not used for single words as those may well be
1389          * reset init script writes.
1390          *
1391          * The other advantage is that as burst writes are default, we'll
1392          * now exercise both burst and non-burst code paths with the
1393          * default settings, increasing code coverage.
1394          */
1395         bool burst = arm11_config_memwrite_burst && (count > 1);
1396
1397         switch (size)
1398         {
1399         case 1:
1400                 {
1401                         arm11->reg_list[ARM11_RC_R1].dirty = 1;
1402
1403                         for (size_t i = 0; i < count; i++)
1404                         {
1405                                 /* MRC p14,0,r1,c0,c5,0 */
1406                                 retval = arm11_run_instr_data_to_core1(arm11, 0xee101e15, *buffer++);
1407                                 if (retval != ERROR_OK)
1408                                         return retval;
1409
1410                                 /* strb    r1, [r0], #1 */
1411                                 /* strb    r1, [r0] */
1412                                 retval = arm11_run_instr_no_data1(arm11,
1413                                         !arm11_config_memrw_no_increment ? 0xe4c01001 : 0xe5c01000);
1414                                 if (retval != ERROR_OK)
1415                                         return retval;
1416                         }
1417
1418                         break;
1419                 }
1420
1421         case 2:
1422                 {
1423                         arm11->reg_list[ARM11_RC_R1].dirty = 1;
1424
1425                         for (size_t i = 0; i < count; i++)
1426                         {
1427                                 uint16_t value;
1428                                 memcpy(&value, buffer + i * sizeof(uint16_t), sizeof(uint16_t));
1429
1430                                 /* MRC p14,0,r1,c0,c5,0 */
1431                                 retval = arm11_run_instr_data_to_core1(arm11, 0xee101e15, value);
1432                                 if (retval != ERROR_OK)
1433                                         return retval;
1434
1435                                 /* strh    r1, [r0], #2 */
1436                                 /* strh    r1, [r0] */
1437                                 retval = arm11_run_instr_no_data1(arm11,
1438                                         !arm11_config_memrw_no_increment ? 0xe0c010b2 : 0xe1c010b0);
1439                                 if (retval != ERROR_OK)
1440                                         return retval;
1441                         }
1442
1443                         break;
1444                 }
1445
1446         case 4: {
1447                 uint32_t instr = !arm11_config_memrw_no_increment ? 0xeca05e01 : 0xed805e00;
1448
1449                 /** \todo TODO: buffer cast to uint32_t* causes alignment warnings */
1450                 uint32_t *words = (uint32_t*)buffer;
1451
1452                 if (!burst)
1453                 {
1454                         /* STC p14,c5,[R0],#4 */
1455                         /* STC p14,c5,[R0]*/
1456                         retval = arm11_run_instr_data_to_core(arm11, instr, words, count);
1457                         if (retval != ERROR_OK)
1458                                 return retval;
1459                 }
1460                 else
1461                 {
1462                         /* STC p14,c5,[R0],#4 */
1463                         /* STC p14,c5,[R0]*/
1464                         retval = arm11_run_instr_data_to_core_noack(arm11, instr, words, count);
1465                         if (retval != ERROR_OK)
1466                                 return retval;
1467                 }
1468
1469                 break;
1470         }
1471         }
1472
1473         /* r0 verification */
1474         if (!arm11_config_memrw_no_increment)
1475         {
1476                 uint32_t r0;
1477
1478                 /* MCR p14,0,R0,c0,c5,0 */
1479                 retval = arm11_run_instr_data_from_core(arm11, 0xEE000E15, &r0, 1);
1480                 if (retval != ERROR_OK)
1481                         return retval;
1482
1483                 if (address + size * count != r0)
1484                 {
1485                         LOG_ERROR("Data transfer failed. Expected end "
1486                                         "address 0x%08x, got 0x%08x",
1487                                         (unsigned) (address + size * count),
1488                                         (unsigned) r0);
1489
1490                         if (burst)
1491                                 LOG_ERROR("use 'arm11 memwrite burst disable' to disable fast burst mode");
1492
1493                         if (arm11_config_memwrite_error_fatal)
1494                                 return ERROR_FAIL;
1495                 }
1496         }
1497
1498         return arm11_run_instr_data_finish(arm11);
1499 }
1500
1501 int arm11_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
1502 {
1503         return arm11_write_memory_inner(target, address, size, count, buffer, false);
1504 }
1505
1506 /* write target memory in multiples of 4 byte, optimized for writing large quantities of data */
1507 int arm11_bulk_write_memory(struct target_s *target, uint32_t address, uint32_t count, uint8_t *buffer)
1508 {
1509         FNC_INFO;
1510
1511         if (target->state != TARGET_HALTED)
1512         {
1513                 LOG_WARNING("target was not halted");
1514                 return ERROR_TARGET_NOT_HALTED;
1515         }
1516
1517         return arm11_write_memory(target, address, 4, count, buffer);
1518 }
1519
1520 /* here we have nothing target specific to contribute, so we fail and then the
1521  * fallback code will read data from the target and calculate the CRC on the
1522  * host.
1523  */
1524 int arm11_checksum_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* checksum)
1525 {
1526         return ERROR_FAIL;
1527 }
1528
1529 /* target break-/watchpoint control
1530 * rw: 0 = write, 1 = read, 2 = access
1531 */
1532 int arm11_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
1533 {
1534         FNC_INFO;
1535
1536         arm11_common_t * arm11 = target->arch_info;
1537
1538 #if 0
1539         if (breakpoint->type == BKPT_SOFT)
1540         {
1541                 LOG_INFO("sw breakpoint requested, but software breakpoints not enabled");
1542                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1543         }
1544 #endif
1545
1546         if (!arm11->free_brps)
1547         {
1548                 LOG_DEBUG("no breakpoint unit available for hardware breakpoint");
1549                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1550         }
1551
1552         if (breakpoint->length != 4)
1553         {
1554                 LOG_DEBUG("only breakpoints of four bytes length supported");
1555                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1556         }
1557
1558         arm11->free_brps--;
1559
1560         return ERROR_OK;
1561 }
1562
1563 int arm11_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
1564 {
1565         FNC_INFO;
1566
1567         arm11_common_t * arm11 = target->arch_info;
1568
1569         arm11->free_brps++;
1570
1571         return ERROR_OK;
1572 }
1573
1574 int arm11_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
1575 {
1576         FNC_INFO_NOTIMPLEMENTED;
1577
1578         return ERROR_OK;
1579 }
1580
1581 int arm11_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
1582 {
1583         FNC_INFO_NOTIMPLEMENTED;
1584
1585         return ERROR_OK;
1586 }
1587
1588 // HACKHACKHACK - FIXME mode/state
1589 /* target algorithm support */
1590 int arm11_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params,
1591                         int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point,
1592                         int timeout_ms, void *arch_info)
1593 {
1594                 arm11_common_t *arm11 = target->arch_info;
1595 //      enum armv4_5_state core_state = arm11->core_state;
1596 //      enum armv4_5_mode core_mode = arm11->core_mode;
1597         uint32_t context[16];
1598         uint32_t cpsr;
1599         int exit_breakpoint_size = 0;
1600         int retval = ERROR_OK;
1601                 LOG_DEBUG("Running algorithm");
1602
1603
1604         if (target->state != TARGET_HALTED)
1605         {
1606                 LOG_WARNING("target not halted");
1607                 return ERROR_TARGET_NOT_HALTED;
1608         }
1609
1610         // FIXME
1611 //      if (armv4_5_mode_to_number(arm11->core_mode)==-1)
1612 //              return ERROR_FAIL;
1613
1614         // Save regs
1615         for (size_t i = 0; i < 16; i++)
1616         {
1617                 context[i] = buf_get_u32((uint8_t*)(&arm11->reg_values[i]),0,32);
1618                 LOG_DEBUG("Save %zi: 0x%" PRIx32 "",i,context[i]);
1619         }
1620
1621         cpsr = buf_get_u32((uint8_t*)(arm11->reg_values + ARM11_RC_CPSR),0,32);
1622         LOG_DEBUG("Save CPSR: 0x%" PRIx32 "", cpsr);
1623
1624         for (int i = 0; i < num_mem_params; i++)
1625         {
1626                 target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
1627         }
1628
1629         // Set register parameters
1630         for (int i = 0; i < num_reg_params; i++)
1631         {
1632                 reg_t *reg = register_get_by_name(arm11->core_cache, reg_params[i].reg_name, 0);
1633                 if (!reg)
1634                 {
1635                         LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
1636                         exit(-1);
1637                 }
1638
1639                 if (reg->size != reg_params[i].size)
1640                 {
1641                         LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
1642                         exit(-1);
1643                 }
1644                 arm11_set_reg(reg,reg_params[i].value);
1645 //              printf("%i: Set %s =%08x\n", i, reg_params[i].reg_name,val);
1646         }
1647
1648         exit_breakpoint_size = 4;
1649
1650 /*      arm11->core_state = arm11_algorithm_info->core_state;
1651         if (arm11->core_state == ARMV4_5_STATE_ARM)
1652                                 exit_breakpoint_size = 4;
1653         else if (arm11->core_state == ARMV4_5_STATE_THUMB)
1654                 exit_breakpoint_size = 2;
1655         else
1656         {
1657                 LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
1658                 exit(-1);
1659         }
1660 */
1661
1662
1663 /* arm11 at this point only supports ARM not THUMB mode
1664    however if this test needs to be reactivated the current state can be read back
1665    from CPSR */
1666 #if 0
1667         if (arm11_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
1668         {
1669                 LOG_DEBUG("setting core_mode: 0x%2.2x", arm11_algorithm_info->core_mode);
1670                 buf_set_u32(arm11->reg_list[ARM11_RC_CPSR].value, 0, 5, arm11_algorithm_info->core_mode);
1671                 arm11->reg_list[ARM11_RC_CPSR].dirty = 1;
1672                 arm11->reg_list[ARM11_RC_CPSR].valid = 1;
1673         }
1674 #endif
1675
1676         if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_HARD)) != ERROR_OK)
1677         {
1678                 LOG_ERROR("can't add breakpoint to finish algorithm execution");
1679                 retval = ERROR_TARGET_FAILURE;
1680                 goto restore;
1681         }
1682
1683         // no debug, otherwise breakpoint is not set
1684         CHECK_RETVAL(target_resume(target, 0, entry_point, 1, 0));
1685
1686         CHECK_RETVAL(target_wait_state(target, TARGET_HALTED, timeout_ms));
1687
1688         if (target->state != TARGET_HALTED)
1689         {
1690                 CHECK_RETVAL(target_halt(target));
1691
1692                 CHECK_RETVAL(target_wait_state(target, TARGET_HALTED, 500));
1693
1694                 retval = ERROR_TARGET_TIMEOUT;
1695
1696                 goto del_breakpoint;
1697         }
1698
1699         if (buf_get_u32(arm11->reg_list[15].value, 0, 32) != exit_point)
1700         {
1701                 LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4" PRIx32 "",
1702                         buf_get_u32(arm11->reg_list[15].value, 0, 32));
1703                 retval = ERROR_TARGET_TIMEOUT;
1704                 goto del_breakpoint;
1705         }
1706
1707         for (int i = 0; i < num_mem_params; i++)
1708         {
1709                 if (mem_params[i].direction != PARAM_OUT)
1710                         target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
1711         }
1712
1713         for (int i = 0; i < num_reg_params; i++)
1714         {
1715                 if (reg_params[i].direction != PARAM_OUT)
1716                 {
1717                         reg_t *reg = register_get_by_name(arm11->core_cache, reg_params[i].reg_name, 0);
1718                         if (!reg)
1719                         {
1720                                 LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
1721                                 exit(-1);
1722                         }
1723
1724                         if (reg->size != reg_params[i].size)
1725                         {
1726                                 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
1727                                 exit(-1);
1728                         }
1729
1730                         buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
1731                 }
1732         }
1733
1734 del_breakpoint:
1735         breakpoint_remove(target, exit_point);
1736
1737 restore:
1738         // Restore context
1739         for (size_t i = 0; i < 16; i++)
1740         {
1741                 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32 "",
1742                          arm11->reg_list[i].name, context[i]);
1743                 arm11_set_reg(&arm11->reg_list[i], (uint8_t*)&context[i]);
1744         }
1745         LOG_DEBUG("restoring CPSR with value 0x%8.8" PRIx32 "", cpsr);
1746         arm11_set_reg(&arm11->reg_list[ARM11_RC_CPSR], (uint8_t*)&cpsr);
1747
1748 //      arm11->core_state = core_state;
1749 //      arm11->core_mode = core_mode;
1750
1751         return retval;
1752 }
1753
1754 int arm11_target_create(struct target_s *target, Jim_Interp *interp)
1755 {
1756         FNC_INFO;
1757
1758         NEW(arm11_common_t, arm11, 1);
1759
1760         arm11->target = target;
1761
1762         if (target->tap == NULL)
1763                 return ERROR_FAIL;
1764
1765         if (target->tap->ir_length != 5)
1766         {
1767                 LOG_ERROR("'target arm11' expects IR LENGTH = 5");
1768                 return ERROR_COMMAND_SYNTAX_ERROR;
1769         }
1770
1771         target->arch_info = arm11;
1772
1773         return ERROR_OK;
1774 }
1775
1776 int arm11_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
1777 {
1778         /* Initialize anything we can set up without talking to the target */
1779         return arm11_build_reg_cache(target);
1780 }
1781
1782 /* talk to the target and set things up */
1783 int arm11_examine(struct target_s *target)
1784 {
1785         int retval;
1786
1787         FNC_INFO;
1788
1789         arm11_common_t * arm11 = target->arch_info;
1790
1791         /* check IDCODE */
1792
1793         arm11_add_IR(arm11, ARM11_IDCODE, ARM11_TAP_DEFAULT);
1794
1795         scan_field_t            idcode_field;
1796
1797         arm11_setup_field(arm11, 32, NULL, &arm11->device_id, &idcode_field);
1798
1799         arm11_add_dr_scan_vc(1, &idcode_field, TAP_DRPAUSE);
1800
1801         /* check DIDR */
1802
1803         arm11_add_debug_SCAN_N(arm11, 0x00, ARM11_TAP_DEFAULT);
1804
1805         arm11_add_IR(arm11, ARM11_INTEST, ARM11_TAP_DEFAULT);
1806
1807         scan_field_t            chain0_fields[2];
1808
1809         arm11_setup_field(arm11, 32, NULL,      &arm11->didr,           chain0_fields + 0);
1810         arm11_setup_field(arm11,  8, NULL,      &arm11->implementor,    chain0_fields + 1);
1811
1812         arm11_add_dr_scan_vc(asizeof(chain0_fields), chain0_fields, TAP_IDLE);
1813
1814         CHECK_RETVAL(jtag_execute_queue());
1815
1816         switch (arm11->device_id & 0x0FFFF000)
1817         {
1818         case 0x07B36000:        LOG_INFO("found ARM1136"); break;
1819         case 0x07B56000:        LOG_INFO("found ARM1156"); break;
1820         case 0x07B76000:        LOG_INFO("found ARM1176"); break;
1821         default:
1822         {
1823                 LOG_ERROR("'target arm11' expects IDCODE 0x*7B*7****");
1824                 return ERROR_FAIL;
1825         }
1826         }
1827
1828         arm11->debug_version = (arm11->didr >> 16) & 0x0F;
1829
1830         if (arm11->debug_version != ARM11_DEBUG_V6 &&
1831                 arm11->debug_version != ARM11_DEBUG_V61)
1832         {
1833                 LOG_ERROR("Only ARMv6 v6 and v6.1 architectures supported.");
1834                 return ERROR_FAIL;
1835         }
1836
1837         arm11->brp      = ((arm11->didr >> 24) & 0x0F) + 1;
1838         arm11->wrp      = ((arm11->didr >> 28) & 0x0F) + 1;
1839
1840         /** \todo TODO: reserve one brp slot if we allow breakpoints during step */
1841         arm11->free_brps = arm11->brp;
1842         arm11->free_wrps = arm11->wrp;
1843
1844         LOG_DEBUG("IDCODE %08" PRIx32 " IMPLEMENTOR %02x DIDR %08" PRIx32 "",
1845                 arm11->device_id,
1846                 (int)(arm11->implementor),
1847                 arm11->didr);
1848
1849         /* as a side-effect this reads DSCR and thus
1850          * clears the ARM11_DSCR_STICKY_PRECISE_DATA_ABORT / Sticky Precise Data Abort Flag
1851          * as suggested by the spec.
1852          */
1853
1854         retval = arm11_check_init(arm11, NULL);
1855         if (retval != ERROR_OK)
1856                 return retval;
1857
1858         target_set_examined(target);
1859
1860         return ERROR_OK;
1861 }
1862
1863 int arm11_quit(void)
1864 {
1865         FNC_INFO_NOTIMPLEMENTED;
1866
1867         return ERROR_OK;
1868 }
1869
1870 /** Load a register that is marked !valid in the register cache */
1871 int arm11_get_reg(reg_t *reg)
1872 {
1873         FNC_INFO;
1874
1875         target_t * target = ((arm11_reg_state_t *)reg->arch_info)->target;
1876
1877         if (target->state != TARGET_HALTED)
1878         {
1879                 LOG_WARNING("target was not halted");
1880                 return ERROR_TARGET_NOT_HALTED;
1881         }
1882
1883         /** \todo TODO: Check this. We assume that all registers are fetched at debug entry. */
1884
1885 #if 0
1886         arm11_common_t *arm11 = target->arch_info;
1887         const arm11_reg_defs_t * arm11_reg_info = arm11_reg_defs + ((arm11_reg_state_t *)reg->arch_info)->def_index;
1888 #endif
1889
1890         return ERROR_OK;
1891 }
1892
1893 /** Change a value in the register cache */
1894 int arm11_set_reg(reg_t *reg, uint8_t *buf)
1895 {
1896         FNC_INFO;
1897
1898         target_t * target = ((arm11_reg_state_t *)reg->arch_info)->target;
1899         arm11_common_t *arm11 = target->arch_info;
1900 //        const arm11_reg_defs_t * arm11_reg_info = arm11_reg_defs + ((arm11_reg_state_t *)reg->arch_info)->def_index;
1901
1902         arm11->reg_values[((arm11_reg_state_t *)reg->arch_info)->def_index] = buf_get_u32(buf, 0, 32);
1903         reg->valid      = 1;
1904         reg->dirty      = 1;
1905
1906         return ERROR_OK;
1907 }
1908
1909 int arm11_build_reg_cache(target_t *target)
1910 {
1911         arm11_common_t *arm11 = target->arch_info;
1912
1913         NEW(reg_cache_t,                cache,                          1);
1914         NEW(reg_t,                              reg_list,                       ARM11_REGCACHE_COUNT);
1915         NEW(arm11_reg_state_t,  arm11_reg_states,       ARM11_REGCACHE_COUNT);
1916
1917         if (arm11_regs_arch_type == -1)
1918                 arm11_regs_arch_type = register_reg_arch_type(arm11_get_reg, arm11_set_reg);
1919
1920         register_init_dummy(&arm11_gdb_dummy_fp_reg);
1921         register_init_dummy(&arm11_gdb_dummy_fps_reg);
1922
1923         arm11->reg_list = reg_list;
1924
1925         /* Build the process context cache */
1926         cache->name             = "arm11 registers";
1927         cache->next             = NULL;
1928         cache->reg_list = reg_list;
1929         cache->num_regs = ARM11_REGCACHE_COUNT;
1930
1931         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
1932         (*cache_p) = cache;
1933
1934         arm11->core_cache = cache;
1935 //        armv7m->process_context = cache;
1936
1937         size_t i;
1938
1939         /* Not very elegant assertion */
1940         if (ARM11_REGCACHE_COUNT != asizeof(arm11->reg_values) ||
1941                 ARM11_REGCACHE_COUNT != asizeof(arm11_reg_defs) ||
1942                 ARM11_REGCACHE_COUNT != ARM11_RC_MAX)
1943         {
1944                 LOG_ERROR("BUG: arm11->reg_values inconsistent (%d " ZU " " ZU " %d)", ARM11_REGCACHE_COUNT, asizeof(arm11->reg_values), asizeof(arm11_reg_defs), ARM11_RC_MAX);
1945                 exit(-1);
1946         }
1947
1948         for (i = 0; i < ARM11_REGCACHE_COUNT; i++)
1949         {
1950                 reg_t *                                         r       = reg_list                      + i;
1951                 const arm11_reg_defs_t *        rd      = arm11_reg_defs        + i;
1952                 arm11_reg_state_t *                     rs      = arm11_reg_states      + i;
1953
1954                 r->name                         = rd->name;
1955                 r->size                         = 32;
1956                 r->value                        = (uint8_t *)(arm11->reg_values + i);
1957                 r->dirty                        = 0;
1958                 r->valid                        = 0;
1959                 r->bitfield_desc        = NULL;
1960                 r->num_bitfields        = 0;
1961                 r->arch_type            = arm11_regs_arch_type;
1962                 r->arch_info            = rs;
1963
1964                 rs->def_index           = i;
1965                 rs->target                      = target;
1966         }
1967
1968         return ERROR_OK;
1969 }
1970
1971 int arm11_handle_bool(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, bool * var, char * name)
1972 {
1973         if (argc == 0)
1974         {
1975                 LOG_INFO("%s is %s.", name, *var ? "enabled" : "disabled");
1976                 return ERROR_OK;
1977         }
1978
1979         if (argc != 1)
1980                 return ERROR_COMMAND_SYNTAX_ERROR;
1981
1982         switch (args[0][0])
1983         {
1984         case '0':       /* 0 */
1985         case 'f':       /* false */
1986         case 'F':
1987         case 'd':       /* disable */
1988         case 'D':
1989                 *var = false;
1990                 break;
1991
1992         case '1':       /* 1 */
1993         case 't':       /* true */
1994         case 'T':
1995         case 'e':       /* enable */
1996         case 'E':
1997                 *var = true;
1998                 break;
1999         }
2000
2001         LOG_INFO("%s %s.", *var ? "Enabled" : "Disabled", name);
2002
2003         return ERROR_OK;
2004 }
2005
2006 #define BOOL_WRAPPER(name, print_name)  \
2007 int arm11_handle_bool_##name(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) \
2008 { \
2009         return arm11_handle_bool(cmd_ctx, cmd, args, argc, &arm11_config_##name, print_name); \
2010 }
2011
2012 BOOL_WRAPPER(memwrite_burst,                    "memory write burst mode")
2013 BOOL_WRAPPER(memwrite_error_fatal,              "fatal error mode for memory writes")
2014 BOOL_WRAPPER(step_irq_enable,                   "IRQs while stepping")
2015 BOOL_WRAPPER(hardware_step,                     "hardware single step")
2016
2017 int arm11_handle_vcr(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2018 {
2019         if (argc == 1)
2020         {
2021                 arm11_vcr = strtoul(args[0], NULL, 0);
2022         }
2023         else if (argc != 0)
2024         {
2025                 return ERROR_COMMAND_SYNTAX_ERROR;
2026         }
2027
2028         LOG_INFO("VCR 0x%08" PRIx32 "", arm11_vcr);
2029         return ERROR_OK;
2030 }
2031
2032 const uint32_t arm11_coproc_instruction_limits[] =
2033 {
2034         15,                             /* coprocessor */
2035         7,                              /* opcode 1 */
2036         15,                             /* CRn */
2037         15,                             /* CRm */
2038         7,                              /* opcode 2 */
2039         0xFFFFFFFF,             /* value */
2040 };
2041
2042 arm11_common_t * arm11_find_target(const char * arg)
2043 {
2044         jtag_tap_t *    tap;
2045         target_t *              t;
2046
2047         tap = jtag_tap_by_string(arg);
2048
2049         if (!tap)
2050                 return 0;
2051
2052         for (t = all_targets; t; t = t->next)
2053         {
2054                 if (t->tap != tap)
2055                         continue;
2056
2057                 /* if (t->type == arm11_target) */
2058                 if (0 == strcmp(target_get_name(t), "arm11"))
2059                         return t->arch_info;
2060         }
2061
2062         return 0;
2063 }
2064
2065 int arm11_handle_mrc_mcr(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, bool read)
2066 {
2067         int retval;
2068
2069         if (argc != (read ? 6 : 7))
2070         {
2071                 LOG_ERROR("Invalid number of arguments.");
2072                 return ERROR_COMMAND_SYNTAX_ERROR;
2073         }
2074
2075         arm11_common_t * arm11 = arm11_find_target(args[0]);
2076
2077         if (!arm11)
2078         {
2079                 LOG_ERROR("Parameter 1 is not a the JTAG chain position of an ARM11 device.");
2080                 return ERROR_COMMAND_SYNTAX_ERROR;
2081         }
2082
2083         if (arm11->target->state != TARGET_HALTED)
2084         {
2085                 LOG_WARNING("target was not halted");
2086                 return ERROR_TARGET_NOT_HALTED;
2087         }
2088
2089         uint32_t        values[6];
2090
2091         for (size_t i = 0; i < (read ? 5 : 6); i++)
2092         {
2093                 values[i] = strtoul(args[i + 1], NULL, 0);
2094
2095                 if (values[i] > arm11_coproc_instruction_limits[i])
2096                 {
2097                         LOG_ERROR("Parameter %ld out of bounds (%" PRId32 " max).",
2098                                   (long)(i + 2),
2099                                   arm11_coproc_instruction_limits[i]);
2100                         return ERROR_COMMAND_SYNTAX_ERROR;
2101                 }
2102         }
2103
2104         uint32_t instr = 0xEE000010     |
2105                 (values[0] <<  8) |
2106                 (values[1] << 21) |
2107                 (values[2] << 16) |
2108                 (values[3] <<  0) |
2109                 (values[4] <<  5);
2110
2111         if (read)
2112                 instr |= 0x00100000;
2113
2114         retval = arm11_run_instr_data_prepare(arm11);
2115         if (retval != ERROR_OK)
2116                 return retval;
2117
2118         if (read)
2119         {
2120                 uint32_t result;
2121                 retval = arm11_run_instr_data_from_core_via_r0(arm11, instr, &result);
2122                 if (retval != ERROR_OK)
2123                         return retval;
2124
2125                 LOG_INFO("MRC p%d, %d, R0, c%d, c%d, %d = 0x%08" PRIx32 " (%" PRId32 ")",
2126                          (int)(values[0]),
2127                          (int)(values[1]),
2128                          (int)(values[2]),
2129                          (int)(values[3]),
2130                          (int)(values[4]), result, result);
2131         }
2132         else
2133         {
2134                 retval = arm11_run_instr_data_to_core_via_r0(arm11, instr, values[5]);
2135                 if (retval != ERROR_OK)
2136                         return retval;
2137
2138                 LOG_INFO("MRC p%d, %d, R0 (#0x%08" PRIx32 "), c%d, c%d, %d",
2139                          (int)(values[0]), (int)(values[1]),
2140                          values[5],
2141                          (int)(values[2]), (int)(values[3]), (int)(values[4]));
2142         }
2143
2144         return arm11_run_instr_data_finish(arm11);
2145 }
2146
2147 int arm11_handle_mrc(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2148 {
2149         return arm11_handle_mrc_mcr(cmd_ctx, cmd, args, argc, true);
2150 }
2151
2152 int arm11_handle_mcr(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2153 {
2154         return arm11_handle_mrc_mcr(cmd_ctx, cmd, args, argc, false);
2155 }
2156
2157 int arm11_register_commands(struct command_context_s *cmd_ctx)
2158 {
2159         FNC_INFO;
2160
2161         command_t *top_cmd, *mw_cmd;
2162
2163         top_cmd = register_command(cmd_ctx, NULL, "arm11",
2164                         NULL, COMMAND_ANY, NULL);
2165
2166         /* "hardware_step" is only here to check if the default
2167          * simulate + breakpoint implementation is broken.
2168          * TEMPORARY! NOT DOCUMENTED!
2169          */
2170         register_command(cmd_ctx, top_cmd, "hardware_step",
2171                         arm11_handle_bool_hardware_step, COMMAND_ANY,
2172                         "DEBUG ONLY - Hardware single stepping"
2173                                 " (default: disabled)");
2174
2175         register_command(cmd_ctx, top_cmd, "mcr",
2176                         arm11_handle_mcr, COMMAND_ANY,
2177                         "Write Coprocessor register. mcr <jtag_target> <coprocessor> <opcode 1> <CRn> <CRm> <opcode 2> <32bit value to write>. All parameters are numbers only.");
2178
2179         mw_cmd = register_command(cmd_ctx, top_cmd, "memwrite",
2180                         NULL, COMMAND_ANY, NULL);
2181         register_command(cmd_ctx, mw_cmd, "burst",
2182                         arm11_handle_bool_memwrite_burst, COMMAND_ANY,
2183                         "Enable/Disable non-standard but fast burst mode"
2184                                 " (default: enabled)");
2185         register_command(cmd_ctx, mw_cmd, "error_fatal",
2186                         arm11_handle_bool_memwrite_error_fatal, COMMAND_ANY,
2187                         "Terminate program if transfer error was found"
2188                                 " (default: enabled)");
2189
2190         register_command(cmd_ctx, top_cmd, "mrc",
2191                         arm11_handle_mrc, COMMAND_ANY,
2192                         "Read Coprocessor register. mrc <jtag_target> <coprocessor> <opcode 1> <CRn> <CRm> <opcode 2>. All parameters are numbers only.");
2193         register_command(cmd_ctx, top_cmd, "step_irq_enable",
2194                         arm11_handle_bool_step_irq_enable, COMMAND_ANY,
2195                         "Enable interrupts while stepping"
2196                                 " (default: disabled)");
2197         register_command(cmd_ctx, top_cmd, "vcr",
2198                         arm11_handle_vcr, COMMAND_ANY,
2199                         "Control (Interrupt) Vector Catch Register");
2200
2201         return ERROR_OK;
2202 }