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   1 /***************************************************************************
   2  *   Copyright (C) 2015 by David Ung                                       *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *                                                                         *
  18  ***************************************************************************/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "breakpoints.h"
  25 #include "aarch64.h"
  26 #include "a64_disassembler.h"
  27 #include "register.h"
  28 #include "target_request.h"
  29 #include "target_type.h"
  30 #include "armv8_opcodes.h"
  31 #include "armv8_cache.h"
  32 #include "arm_coresight.h"
  33 #include "arm_semihosting.h"
  34 #include "jtag/interface.h"
  35 #include "smp.h"
  36 #include <helper/time_support.h>
  37
  38 enum restart_mode {
  39         RESTART_LAZY,
  40         RESTART_SYNC,
  41 };
  42
  43 enum halt_mode {
  44         HALT_LAZY,
  45         HALT_SYNC,
  46 };
  47
  48 struct aarch64_private_config {
  49         struct adiv5_private_config adiv5_config;
  50         struct arm_cti *cti;
  51 };
  52
  53 static int aarch64_poll(struct target *target);
  54 static int aarch64_debug_entry(struct target *target);
  55 static int aarch64_restore_context(struct target *target, bool bpwp);
  56 static int aarch64_set_breakpoint(struct target *target,
  57         struct breakpoint *breakpoint, uint8_t matchmode);
  58 static int aarch64_set_context_breakpoint(struct target *target,
  59         struct breakpoint *breakpoint, uint8_t matchmode);
  60 static int aarch64_set_hybrid_breakpoint(struct target *target,
  61         struct breakpoint *breakpoint);
  62 static int aarch64_unset_breakpoint(struct target *target,
  63         struct breakpoint *breakpoint);
  64 static int aarch64_mmu(struct target *target, int *enabled);
  65 static int aarch64_virt2phys(struct target *target,
  66         target_addr_t virt, target_addr_t *phys);
  67 static int aarch64_read_cpu_memory(struct target *target,
  68         uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
  69
  70 static int aarch64_restore_system_control_reg(struct target *target)
  71 {
  72         enum arm_mode target_mode = ARM_MODE_ANY;
  73         int retval = ERROR_OK;
  74         uint32_t instr;
  75
  76         struct aarch64_common *aarch64 = target_to_aarch64(target);
  77         struct armv8_common *armv8 = target_to_armv8(target);
  78
  79         if (aarch64->system_control_reg != aarch64->system_control_reg_curr) {
  80                 aarch64->system_control_reg_curr = aarch64->system_control_reg;
  81                 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_v8->cp15_control_reg); */
  82
  83                 switch (armv8->arm.core_mode) {
  84                 case ARMV8_64_EL0T:
  85                         target_mode = ARMV8_64_EL1H;
  86                         /* fall through */
  87                 case ARMV8_64_EL1T:
  88                 case ARMV8_64_EL1H:
  89                         instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL1, 0);
  90                         break;
  91                 case ARMV8_64_EL2T:
  92                 case ARMV8_64_EL2H:
  93                         instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL2, 0);
  94                         break;
  95                 case ARMV8_64_EL3H:
  96                 case ARMV8_64_EL3T:
  97                         instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL3, 0);
  98                         break;
  99
 100                 case ARM_MODE_SVC:
 101                 case ARM_MODE_ABT:
 102                 case ARM_MODE_FIQ:
 103                 case ARM_MODE_IRQ:
 104                 case ARM_MODE_HYP:
 105                 case ARM_MODE_UND:
 106                 case ARM_MODE_SYS:
 107                         instr = ARMV4_5_MCR(15, 0, 0, 1, 0, 0);
 108                         break;
 109
 110                 default:
 111                         LOG_ERROR("cannot read system control register in this mode: (%s : 0x%x)",
 112                                         armv8_mode_name(armv8->arm.core_mode), armv8->arm.core_mode);
 113                         return ERROR_FAIL;
 114                 }
 115
 116                 if (target_mode != ARM_MODE_ANY)
 117                         armv8_dpm_modeswitch(&armv8->dpm, target_mode);
 118
 119                 retval = armv8->dpm.instr_write_data_r0(&armv8->dpm, instr, aarch64->system_control_reg);
 120                 if (retval != ERROR_OK)
 121                         return retval;
 122
 123                 if (target_mode != ARM_MODE_ANY)
 124                         armv8_dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
 125         }
 126
 127         return retval;
 128 }
 129
 130 /*  modify system_control_reg in order to enable or disable mmu for :
 131  *  - virt2phys address conversion
 132  *  - read or write memory in phys or virt address */
 133 static int aarch64_mmu_modify(struct target *target, int enable)
 134 {
 135         struct aarch64_common *aarch64 = target_to_aarch64(target);
 136         struct armv8_common *armv8 = &aarch64->armv8_common;
 137         int retval = ERROR_OK;
 138         enum arm_mode target_mode = ARM_MODE_ANY;
 139         uint32_t instr = 0;
 140
 141         if (enable) {
 142                 /*      if mmu enabled at target stop and mmu not enable */
 143                 if (!(aarch64->system_control_reg & 0x1U)) {
 144                         LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
 145                         return ERROR_FAIL;
 146                 }
 147                 if (!(aarch64->system_control_reg_curr & 0x1U))
 148                         aarch64->system_control_reg_curr |= 0x1U;
 149         } else {
 150                 if (aarch64->system_control_reg_curr & 0x4U) {
 151                         /*  data cache is active */
 152                         aarch64->system_control_reg_curr &= ~0x4U;
 153                         /* flush data cache armv8 function to be called */
 154                         if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache)
 155                                 armv8->armv8_mmu.armv8_cache.flush_all_data_cache(target);
 156                 }
 157                 if ((aarch64->system_control_reg_curr & 0x1U)) {
 158                         aarch64->system_control_reg_curr &= ~0x1U;
 159                 }
 160         }
 161
 162         switch (armv8->arm.core_mode) {
 163         case ARMV8_64_EL0T:
 164                 target_mode = ARMV8_64_EL1H;
 165                 /* fall through */
 166         case ARMV8_64_EL1T:
 167         case ARMV8_64_EL1H:
 168                 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL1, 0);
 169                 break;
 170         case ARMV8_64_EL2T:
 171         case ARMV8_64_EL2H:
 172                 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL2, 0);
 173                 break;
 174         case ARMV8_64_EL3H:
 175         case ARMV8_64_EL3T:
 176                 instr = ARMV8_MSR_GP(SYSTEM_SCTLR_EL3, 0);
 177                 break;
 178
 179         case ARM_MODE_SVC:
 180         case ARM_MODE_ABT:
 181         case ARM_MODE_FIQ:
 182         case ARM_MODE_IRQ:
 183         case ARM_MODE_HYP:
 184         case ARM_MODE_UND:
 185         case ARM_MODE_SYS:
 186                 instr = ARMV4_5_MCR(15, 0, 0, 1, 0, 0);
 187                 break;
 188
 189         default:
 190                 LOG_DEBUG("unknown cpu state 0x%x", armv8->arm.core_mode);
 191                 break;
 192         }
 193         if (target_mode != ARM_MODE_ANY)
 194                 armv8_dpm_modeswitch(&armv8->dpm, target_mode);
 195
 196         retval = armv8->dpm.instr_write_data_r0(&armv8->dpm, instr,
 197                                 aarch64->system_control_reg_curr);
 198
 199         if (target_mode != ARM_MODE_ANY)
 200                 armv8_dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
 201
 202         return retval;
 203 }
 204
 205 /*
 206  * Basic debug access, very low level assumes state is saved
 207  */
 208 static int aarch64_init_debug_access(struct target *target)
 209 {
 210         struct armv8_common *armv8 = target_to_armv8(target);
 211         int retval;
 212         uint32_t dummy;
 213
 214         LOG_DEBUG("%s", target_name(target));
 215
 216         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
 217                         armv8->debug_base + CPUV8_DBG_OSLAR, 0);
 218         if (retval != ERROR_OK) {
 219                 LOG_DEBUG("Examine %s failed", "oslock");
 220                 return retval;
 221         }
 222
 223         /* Clear Sticky Power Down status Bit in PRSR to enable access to
 224            the registers in the Core Power Domain */
 225         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 226                         armv8->debug_base + CPUV8_DBG_PRSR, &dummy);
 227         if (retval != ERROR_OK)
 228                 return retval;
 229
 230         /*
 231          * Static CTI configuration:
 232          * Channel 0 -> trigger outputs HALT request to PE
 233          * Channel 1 -> trigger outputs Resume request to PE
 234          * Gate all channel trigger events from entering the CTM
 235          */
 236
 237         /* Enable CTI */
 238         retval = arm_cti_enable(armv8->cti, true);
 239         /* By default, gate all channel events to and from the CTM */
 240         if (retval == ERROR_OK)
 241                 retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
 242         /* output halt requests to PE on channel 0 event */
 243         if (retval == ERROR_OK)
 244                 retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN0, CTI_CHNL(0));
 245         /* output restart requests to PE on channel 1 event */
 246         if (retval == ERROR_OK)
 247                 retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN1, CTI_CHNL(1));
 248         if (retval != ERROR_OK)
 249                 return retval;
 250
 251         /* Resync breakpoint registers */
 252
 253         return ERROR_OK;
 254 }
 255
 256 /* Write to memory mapped registers directly with no cache or mmu handling */
 257 static int aarch64_dap_write_memap_register_u32(struct target *target,
 258         target_addr_t address,
 259         uint32_t value)
 260 {
 261         int retval;
 262         struct armv8_common *armv8 = target_to_armv8(target);
 263
 264         retval = mem_ap_write_atomic_u32(armv8->debug_ap, address, value);
 265
 266         return retval;
 267 }
 268
 269 static int aarch64_dpm_setup(struct aarch64_common *a8, uint64_t debug)
 270 {
 271         struct arm_dpm *dpm = &a8->armv8_common.dpm;
 272         int retval;
 273
 274         dpm->arm = &a8->armv8_common.arm;
 275         dpm->didr = debug;
 276
 277         retval = armv8_dpm_setup(dpm);
 278         if (retval == ERROR_OK)
 279                 retval = armv8_dpm_initialize(dpm);
 280
 281         return retval;
 282 }
 283
 284 static int aarch64_set_dscr_bits(struct target *target, unsigned long bit_mask, unsigned long value)
 285 {
 286         struct armv8_common *armv8 = target_to_armv8(target);
 287         return armv8_set_dbgreg_bits(armv8, CPUV8_DBG_DSCR, bit_mask, value);
 288 }
 289
 290 static int aarch64_check_state_one(struct target *target,
 291                 uint32_t mask, uint32_t val, int *p_result, uint32_t *p_prsr)
 292 {
 293         struct armv8_common *armv8 = target_to_armv8(target);
 294         uint32_t prsr;
 295         int retval;
 296
 297         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 298                         armv8->debug_base + CPUV8_DBG_PRSR, &prsr);
 299         if (retval != ERROR_OK)
 300                 return retval;
 301
 302         if (p_prsr)
 303                 *p_prsr = prsr;
 304
 305         if (p_result)
 306                 *p_result = (prsr & mask) == (val & mask);
 307
 308         return ERROR_OK;
 309 }
 310
 311 static int aarch64_wait_halt_one(struct target *target)
 312 {
 313         int retval = ERROR_OK;
 314         uint32_t prsr;
 315
 316         int64_t then = timeval_ms();
 317         for (;;) {
 318                 int halted;
 319
 320                 retval = aarch64_check_state_one(target, PRSR_HALT, PRSR_HALT, &halted, &prsr);
 321                 if (retval != ERROR_OK || halted)
 322                         break;
 323
 324                 if (timeval_ms() > then + 1000) {
 325                         retval = ERROR_TARGET_TIMEOUT;
 326                         LOG_DEBUG("target %s timeout, prsr=0x%08"PRIx32, target_name(target), prsr);
 327                         break;
 328                 }
 329         }
 330         return retval;
 331 }
 332
 333 static int aarch64_prepare_halt_smp(struct target *target, bool exc_target, struct target **p_first)
 334 {
 335         int retval = ERROR_OK;
 336         struct target_list *head;
 337         struct target *first = NULL;
 338
 339         LOG_DEBUG("target %s exc %i", target_name(target), exc_target);
 340
 341         foreach_smp_target(head, target->smp_targets) {
 342                 struct target *curr = head->target;
 343                 struct armv8_common *armv8 = target_to_armv8(curr);
 344
 345                 if (exc_target && curr == target)
 346                         continue;
 347                 if (!target_was_examined(curr))
 348                         continue;
 349                 if (curr->state != TARGET_RUNNING)
 350                         continue;
 351
 352                 /* HACK: mark this target as prepared for halting */
 353                 curr->debug_reason = DBG_REASON_DBGRQ;
 354
 355                 /* open the gate for channel 0 to let HALT requests pass to the CTM */
 356                 retval = arm_cti_ungate_channel(armv8->cti, 0);
 357                 if (retval == ERROR_OK)
 358                         retval = aarch64_set_dscr_bits(curr, DSCR_HDE, DSCR_HDE);
 359                 if (retval != ERROR_OK)
 360                         break;
 361
 362                 LOG_DEBUG("target %s prepared", target_name(curr));
 363
 364                 if (!first)
 365                         first = curr;
 366         }
 367
 368         if (p_first) {
 369                 if (exc_target && first)
 370                         *p_first = first;
 371                 else
 372                         *p_first = target;
 373         }
 374
 375         return retval;
 376 }
 377
 378 static int aarch64_halt_one(struct target *target, enum halt_mode mode)
 379 {
 380         int retval = ERROR_OK;
 381         struct armv8_common *armv8 = target_to_armv8(target);
 382
 383         LOG_DEBUG("%s", target_name(target));
 384
 385         /* allow Halting Debug Mode */
 386         retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
 387         if (retval != ERROR_OK)
 388                 return retval;
 389
 390         /* trigger an event on channel 0, this outputs a halt request to the PE */
 391         retval = arm_cti_pulse_channel(armv8->cti, 0);
 392         if (retval != ERROR_OK)
 393                 return retval;
 394
 395         if (mode == HALT_SYNC) {
 396                 retval = aarch64_wait_halt_one(target);
 397                 if (retval != ERROR_OK) {
 398                         if (retval == ERROR_TARGET_TIMEOUT)
 399                                 LOG_ERROR("Timeout waiting for target %s halt", target_name(target));
 400                         return retval;
 401                 }
 402         }
 403
 404         return ERROR_OK;
 405 }
 406
 407 static int aarch64_halt_smp(struct target *target, bool exc_target)
 408 {
 409         struct target *next = target;
 410         int retval;
 411
 412         /* prepare halt on all PEs of the group */
 413         retval = aarch64_prepare_halt_smp(target, exc_target, &next);
 414
 415         if (exc_target && next == target)
 416                 return retval;
 417
 418         /* halt the target PE */
 419         if (retval == ERROR_OK)
 420                 retval = aarch64_halt_one(next, HALT_LAZY);
 421
 422         if (retval != ERROR_OK)
 423                 return retval;
 424
 425         /* wait for all PEs to halt */
 426         int64_t then = timeval_ms();
 427         for (;;) {
 428                 bool all_halted = true;
 429                 struct target_list *head;
 430                 struct target *curr;
 431
 432                 foreach_smp_target(head, target->smp_targets) {
 433                         int halted;
 434
 435                         curr = head->target;
 436
 437                         if (!target_was_examined(curr))
 438                                 continue;
 439
 440                         retval = aarch64_check_state_one(curr, PRSR_HALT, PRSR_HALT, &halted, NULL);
 441                         if (retval != ERROR_OK || !halted) {
 442                                 all_halted = false;
 443                                 break;
 444                         }
 445                 }
 446
 447                 if (all_halted)
 448                         break;
 449
 450                 if (timeval_ms() > then + 1000) {
 451                         retval = ERROR_TARGET_TIMEOUT;
 452                         break;
 453                 }
 454
 455                 /*
 456                  * HACK: on Hi6220 there are 8 cores organized in 2 clusters
 457                  * and it looks like the CTI's are not connected by a common
 458                  * trigger matrix. It seems that we need to halt one core in each
 459                  * cluster explicitly. So if we find that a core has not halted
 460                  * yet, we trigger an explicit halt for the second cluster.
 461                  */
 462                 retval = aarch64_halt_one(curr, HALT_LAZY);
 463                 if (retval != ERROR_OK)
 464                         break;
 465         }
 466
 467         return retval;
 468 }
 469
 470 static int update_halt_gdb(struct target *target, enum target_debug_reason debug_reason)
 471 {
 472         struct target *gdb_target = NULL;
 473         struct target_list *head;
 474         struct target *curr;
 475
 476         if (debug_reason == DBG_REASON_NOTHALTED) {
 477                 LOG_DEBUG("Halting remaining targets in SMP group");
 478                 aarch64_halt_smp(target, true);
 479         }
 480
 481         /* poll all targets in the group, but skip the target that serves GDB */
 482         foreach_smp_target(head, target->smp_targets) {
 483                 curr = head->target;
 484                 /* skip calling context */
 485                 if (curr == target)
 486                         continue;
 487                 if (!target_was_examined(curr))
 488                         continue;
 489                 /* skip targets that were already halted */
 490                 if (curr->state == TARGET_HALTED)
 491                         continue;
 492                 /* remember the gdb_service->target */
 493                 if (curr->gdb_service)
 494                         gdb_target = curr->gdb_service->target;
 495                 /* skip it */
 496                 if (curr == gdb_target)
 497                         continue;
 498
 499                 /* avoid recursion in aarch64_poll() */
 500                 curr->smp = 0;
 501                 aarch64_poll(curr);
 502                 curr->smp = 1;
 503         }
 504
 505         /* after all targets were updated, poll the gdb serving target */
 506         if (gdb_target && gdb_target != target)
 507                 aarch64_poll(gdb_target);
 508
 509         return ERROR_OK;
 510 }
 511
 512 /*
 513  * Aarch64 Run control
 514  */
 515
 516 static int aarch64_poll(struct target *target)
 517 {
 518         enum target_state prev_target_state;
 519         int retval = ERROR_OK;
 520         int halted;
 521
 522         retval = aarch64_check_state_one(target,
 523                                 PRSR_HALT, PRSR_HALT, &halted, NULL);
 524         if (retval != ERROR_OK)
 525                 return retval;
 526
 527         if (halted) {
 528                 prev_target_state = target->state;
 529                 if (prev_target_state != TARGET_HALTED) {
 530                         enum target_debug_reason debug_reason = target->debug_reason;
 531
 532                         /* We have a halting debug event */
 533                         target->state = TARGET_HALTED;
 534                         LOG_DEBUG("Target %s halted", target_name(target));
 535                         retval = aarch64_debug_entry(target);
 536                         if (retval != ERROR_OK)
 537                                 return retval;
 538
 539                         if (target->smp)
 540                                 update_halt_gdb(target, debug_reason);
 541
 542                         if (arm_semihosting(target, &retval) != 0)
 543                                 return retval;
 544
 545                         switch (prev_target_state) {
 546                         case TARGET_RUNNING:
 547                         case TARGET_UNKNOWN:
 548                         case TARGET_RESET:
 549                                 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 550                                 break;
 551                         case TARGET_DEBUG_RUNNING:
 552                                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
 553                                 break;
 554                         default:
 555                                 break;
 556                         }
 557                 }
 558         } else
 559                 target->state = TARGET_RUNNING;
 560
 561         return retval;
 562 }
 563
 564 static int aarch64_halt(struct target *target)
 565 {
 566         struct armv8_common *armv8 = target_to_armv8(target);
 567         armv8->last_run_control_op = ARMV8_RUNCONTROL_HALT;
 568
 569         if (target->smp)
 570                 return aarch64_halt_smp(target, false);
 571
 572         return aarch64_halt_one(target, HALT_SYNC);
 573 }
 574
 575 static int aarch64_restore_one(struct target *target, int current,
 576         uint64_t *address, int handle_breakpoints, int debug_execution)
 577 {
 578         struct armv8_common *armv8 = target_to_armv8(target);
 579         struct arm *arm = &armv8->arm;
 580         int retval;
 581         uint64_t resume_pc;
 582
 583         LOG_DEBUG("%s", target_name(target));
 584
 585         if (!debug_execution)
 586                 target_free_all_working_areas(target);
 587
 588         /* current = 1: continue on current pc, otherwise continue at <address> */
 589         resume_pc = buf_get_u64(arm->pc->value, 0, 64);
 590         if (!current)
 591                 resume_pc = *address;
 592         else
 593                 *address = resume_pc;
 594
 595         /* Make sure that the Armv7 gdb thumb fixups does not
 596          * kill the return address
 597          */
 598         switch (arm->core_state) {
 599                 case ARM_STATE_ARM:
 600                         resume_pc &= 0xFFFFFFFC;
 601                         break;
 602                 case ARM_STATE_AARCH64:
 603                         resume_pc &= 0xFFFFFFFFFFFFFFFC;
 604                         break;
 605                 case ARM_STATE_THUMB:
 606                 case ARM_STATE_THUMB_EE:
 607                         /* When the return address is loaded into PC
 608                          * bit 0 must be 1 to stay in Thumb state
 609                          */
 610                         resume_pc |= 0x1;
 611                         break;
 612                 case ARM_STATE_JAZELLE:
 613                         LOG_ERROR("How do I resume into Jazelle state??");
 614                         return ERROR_FAIL;
 615         }
 616         LOG_DEBUG("resume pc = 0x%016" PRIx64, resume_pc);
 617         buf_set_u64(arm->pc->value, 0, 64, resume_pc);
 618         arm->pc->dirty = true;
 619         arm->pc->valid = true;
 620
 621         /* called it now before restoring context because it uses cpu
 622          * register r0 for restoring system control register */
 623         retval = aarch64_restore_system_control_reg(target);
 624         if (retval == ERROR_OK)
 625                 retval = aarch64_restore_context(target, handle_breakpoints);
 626
 627         return retval;
 628 }
 629
 630 /**
 631  * prepare single target for restart
 632  *
 633  *
 634  */
 635 static int aarch64_prepare_restart_one(struct target *target)
 636 {
 637         struct armv8_common *armv8 = target_to_armv8(target);
 638         int retval;
 639         uint32_t dscr;
 640         uint32_t tmp;
 641
 642         LOG_DEBUG("%s", target_name(target));
 643
 644         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 645                         armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
 646         if (retval != ERROR_OK)
 647                 return retval;
 648
 649         if ((dscr & DSCR_ITE) == 0)
 650                 LOG_ERROR("DSCR.ITE must be set before leaving debug!");
 651         if ((dscr & DSCR_ERR) != 0)
 652                 LOG_ERROR("DSCR.ERR must be cleared before leaving debug!");
 653
 654         /* acknowledge a pending CTI halt event */
 655         retval = arm_cti_ack_events(armv8->cti, CTI_TRIG(HALT));
 656         /*
 657          * open the CTI gate for channel 1 so that the restart events
 658          * get passed along to all PEs. Also close gate for channel 0
 659          * to isolate the PE from halt events.
 660          */
 661         if (retval == ERROR_OK)
 662                 retval = arm_cti_ungate_channel(armv8->cti, 1);
 663         if (retval == ERROR_OK)
 664                 retval = arm_cti_gate_channel(armv8->cti, 0);
 665
 666         /* make sure that DSCR.HDE is set */
 667         if (retval == ERROR_OK) {
 668                 dscr |= DSCR_HDE;
 669                 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
 670                                 armv8->debug_base + CPUV8_DBG_DSCR, dscr);
 671         }
 672
 673         if (retval == ERROR_OK) {
 674                 /* clear sticky bits in PRSR, SDR is now 0 */
 675                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 676                                 armv8->debug_base + CPUV8_DBG_PRSR, &tmp);
 677         }
 678
 679         return retval;
 680 }
 681
 682 static int aarch64_do_restart_one(struct target *target, enum restart_mode mode)
 683 {
 684         struct armv8_common *armv8 = target_to_armv8(target);
 685         int retval;
 686
 687         LOG_DEBUG("%s", target_name(target));
 688
 689         /* trigger an event on channel 1, generates a restart request to the PE */
 690         retval = arm_cti_pulse_channel(armv8->cti, 1);
 691         if (retval != ERROR_OK)
 692                 return retval;
 693
 694         if (mode == RESTART_SYNC) {
 695                 int64_t then = timeval_ms();
 696                 for (;;) {
 697                         int resumed;
 698                         /*
 699                          * if PRSR.SDR is set now, the target did restart, even
 700                          * if it's now already halted again (e.g. due to breakpoint)
 701                          */
 702                         retval = aarch64_check_state_one(target,
 703                                                 PRSR_SDR, PRSR_SDR, &resumed, NULL);
 704                         if (retval != ERROR_OK || resumed)
 705                                 break;
 706
 707                         if (timeval_ms() > then + 1000) {
 708                                 LOG_ERROR("%s: Timeout waiting for resume"PRIx32, target_name(target));
 709                                 retval = ERROR_TARGET_TIMEOUT;
 710                                 break;
 711                         }
 712                 }
 713         }
 714
 715         if (retval != ERROR_OK)
 716                 return retval;
 717
 718         target->debug_reason = DBG_REASON_NOTHALTED;
 719         target->state = TARGET_RUNNING;
 720
 721         return ERROR_OK;
 722 }
 723
 724 static int aarch64_restart_one(struct target *target, enum restart_mode mode)
 725 {
 726         int retval;
 727
 728         LOG_DEBUG("%s", target_name(target));
 729
 730         retval = aarch64_prepare_restart_one(target);
 731         if (retval == ERROR_OK)
 732                 retval = aarch64_do_restart_one(target, mode);
 733
 734         return retval;
 735 }
 736
 737 /*
 738  * prepare all but the current target for restart
 739  */
 740 static int aarch64_prep_restart_smp(struct target *target, int handle_breakpoints, struct target **p_first)
 741 {
 742         int retval = ERROR_OK;
 743         struct target_list *head;
 744         struct target *first = NULL;
 745         uint64_t address;
 746
 747         foreach_smp_target(head, target->smp_targets) {
 748                 struct target *curr = head->target;
 749
 750                 /* skip calling target */
 751                 if (curr == target)
 752                         continue;
 753                 if (!target_was_examined(curr))
 754                         continue;
 755                 if (curr->state != TARGET_HALTED)
 756                         continue;
 757
 758                 /*  resume at current address, not in step mode */
 759                 retval = aarch64_restore_one(curr, 1, &address, handle_breakpoints, 0);
 760                 if (retval == ERROR_OK)
 761                         retval = aarch64_prepare_restart_one(curr);
 762                 if (retval != ERROR_OK) {
 763                         LOG_ERROR("failed to restore target %s", target_name(curr));
 764                         break;
 765                 }
 766                 /* remember the first valid target in the group */
 767                 if (!first)
 768                         first = curr;
 769         }
 770
 771         if (p_first)
 772                 *p_first = first;
 773
 774         return retval;
 775 }
 776
 777
 778 static int aarch64_step_restart_smp(struct target *target)
 779 {
 780         int retval = ERROR_OK;
 781         struct target_list *head;
 782         struct target *first = NULL;
 783
 784         LOG_DEBUG("%s", target_name(target));
 785
 786         retval = aarch64_prep_restart_smp(target, 0, &first);
 787         if (retval != ERROR_OK)
 788                 return retval;
 789
 790         if (first)
 791                 retval = aarch64_do_restart_one(first, RESTART_LAZY);
 792         if (retval != ERROR_OK) {
 793                 LOG_DEBUG("error restarting target %s", target_name(first));
 794                 return retval;
 795         }
 796
 797         int64_t then = timeval_ms();
 798         for (;;) {
 799                 struct target *curr = target;
 800                 bool all_resumed = true;
 801
 802                 foreach_smp_target(head, target->smp_targets) {
 803                         uint32_t prsr;
 804                         int resumed;
 805
 806                         curr = head->target;
 807
 808                         if (curr == target)
 809                                 continue;
 810
 811                         if (!target_was_examined(curr))
 812                                 continue;
 813
 814                         retval = aarch64_check_state_one(curr,
 815                                         PRSR_SDR, PRSR_SDR, &resumed, &prsr);
 816                         if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
 817                                 all_resumed = false;
 818                                 break;
 819                         }
 820
 821                         if (curr->state != TARGET_RUNNING) {
 822                                 curr->state = TARGET_RUNNING;
 823                                 curr->debug_reason = DBG_REASON_NOTHALTED;
 824                                 target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
 825                         }
 826                 }
 827
 828                 if (all_resumed)
 829                         break;
 830
 831                 if (timeval_ms() > then + 1000) {
 832                         LOG_ERROR("%s: timeout waiting for target resume", __func__);
 833                         retval = ERROR_TARGET_TIMEOUT;
 834                         break;
 835                 }
 836                 /*
 837                  * HACK: on Hi6220 there are 8 cores organized in 2 clusters
 838                  * and it looks like the CTI's are not connected by a common
 839                  * trigger matrix. It seems that we need to halt one core in each
 840                  * cluster explicitly. So if we find that a core has not halted
 841                  * yet, we trigger an explicit resume for the second cluster.
 842                  */
 843                 retval = aarch64_do_restart_one(curr, RESTART_LAZY);
 844                 if (retval != ERROR_OK)
 845                         break;
 846 }
 847
 848         return retval;
 849 }
 850
 851 static int aarch64_resume(struct target *target, int current,
 852         target_addr_t address, int handle_breakpoints, int debug_execution)
 853 {
 854         int retval = 0;
 855         uint64_t addr = address;
 856
 857         struct armv8_common *armv8 = target_to_armv8(target);
 858         armv8->last_run_control_op = ARMV8_RUNCONTROL_RESUME;
 859
 860         if (target->state != TARGET_HALTED)
 861                 return ERROR_TARGET_NOT_HALTED;
 862
 863         /*
 864          * If this target is part of a SMP group, prepare the others
 865          * targets for resuming. This involves restoring the complete
 866          * target register context and setting up CTI gates to accept
 867          * resume events from the trigger matrix.
 868          */
 869         if (target->smp) {
 870                 retval = aarch64_prep_restart_smp(target, handle_breakpoints, NULL);
 871                 if (retval != ERROR_OK)
 872                         return retval;
 873         }
 874
 875         /* all targets prepared, restore and restart the current target */
 876         retval = aarch64_restore_one(target, current, &addr, handle_breakpoints,
 877                                  debug_execution);
 878         if (retval == ERROR_OK)
 879                 retval = aarch64_restart_one(target, RESTART_SYNC);
 880         if (retval != ERROR_OK)
 881                 return retval;
 882
 883         if (target->smp) {
 884                 int64_t then = timeval_ms();
 885                 for (;;) {
 886                         struct target *curr = target;
 887                         struct target_list *head;
 888                         bool all_resumed = true;
 889
 890                         foreach_smp_target(head, target->smp_targets) {
 891                                 uint32_t prsr;
 892                                 int resumed;
 893
 894                                 curr = head->target;
 895                                 if (curr == target)
 896                                         continue;
 897                                 if (!target_was_examined(curr))
 898                                         continue;
 899
 900                                 retval = aarch64_check_state_one(curr,
 901                                                 PRSR_SDR, PRSR_SDR, &resumed, &prsr);
 902                                 if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
 903                                         all_resumed = false;
 904                                         break;
 905                                 }
 906
 907                                 if (curr->state != TARGET_RUNNING) {
 908                                         curr->state = TARGET_RUNNING;
 909                                         curr->debug_reason = DBG_REASON_NOTHALTED;
 910                                         target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
 911                                 }
 912                         }
 913
 914                         if (all_resumed)
 915                                 break;
 916
 917                         if (timeval_ms() > then + 1000) {
 918                                 LOG_ERROR("%s: timeout waiting for target %s to resume", __func__, target_name(curr));
 919                                 retval = ERROR_TARGET_TIMEOUT;
 920                                 break;
 921                         }
 922
 923                         /*
 924                          * HACK: on Hi6220 there are 8 cores organized in 2 clusters
 925                          * and it looks like the CTI's are not connected by a common
 926                          * trigger matrix. It seems that we need to halt one core in each
 927                          * cluster explicitly. So if we find that a core has not halted
 928                          * yet, we trigger an explicit resume for the second cluster.
 929                          */
 930                         retval = aarch64_do_restart_one(curr, RESTART_LAZY);
 931                         if (retval != ERROR_OK)
 932                                 break;
 933                 }
 934         }
 935
 936         if (retval != ERROR_OK)
 937                 return retval;
 938
 939         target->debug_reason = DBG_REASON_NOTHALTED;
 940
 941         if (!debug_execution) {
 942                 target->state = TARGET_RUNNING;
 943                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
 944                 LOG_DEBUG("target resumed at 0x%" PRIx64, addr);
 945         } else {
 946                 target->state = TARGET_DEBUG_RUNNING;
 947                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
 948                 LOG_DEBUG("target debug resumed at 0x%" PRIx64, addr);
 949         }
 950
 951         return ERROR_OK;
 952 }
 953
 954 static int aarch64_debug_entry(struct target *target)
 955 {
 956         int retval = ERROR_OK;
 957         struct armv8_common *armv8 = target_to_armv8(target);
 958         struct arm_dpm *dpm = &armv8->dpm;
 959         enum arm_state core_state;
 960         uint32_t dscr;
 961
 962         /* make sure to clear all sticky errors */
 963         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
 964                         armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
 965         if (retval == ERROR_OK)
 966                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 967                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
 968         if (retval == ERROR_OK)
 969                 retval = arm_cti_ack_events(armv8->cti, CTI_TRIG(HALT));
 970
 971         if (retval != ERROR_OK)
 972                 return retval;
 973
 974         LOG_DEBUG("%s dscr = 0x%08" PRIx32, target_name(target), dscr);
 975
 976         dpm->dscr = dscr;
 977         core_state = armv8_dpm_get_core_state(dpm);
 978         armv8_select_opcodes(armv8, core_state == ARM_STATE_AARCH64);
 979         armv8_select_reg_access(armv8, core_state == ARM_STATE_AARCH64);
 980
 981         /* close the CTI gate for all events */
 982         if (retval == ERROR_OK)
 983                 retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
 984         /* discard async exceptions */
 985         if (retval == ERROR_OK)
 986                 retval = dpm->instr_cpsr_sync(dpm);
 987         if (retval != ERROR_OK)
 988                 return retval;
 989
 990         /* Examine debug reason */
 991         armv8_dpm_report_dscr(dpm, dscr);
 992
 993         /* save the memory address that triggered the watchpoint */
 994         if (target->debug_reason == DBG_REASON_WATCHPOINT) {
 995                 uint32_t tmp;
 996
 997                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
 998                                 armv8->debug_base + CPUV8_DBG_EDWAR0, &tmp);
 999                 if (retval != ERROR_OK)
1000                         return retval;
1001                 target_addr_t edwar = tmp;
1002
1003                 /* EDWAR[63:32] has unknown content in aarch32 state */
1004                 if (core_state == ARM_STATE_AARCH64) {
1005                         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1006                                         armv8->debug_base + CPUV8_DBG_EDWAR1, &tmp);
1007                         if (retval != ERROR_OK)
1008                                 return retval;
1009                         edwar |= ((target_addr_t)tmp) << 32;
1010                 }
1011
1012                 armv8->dpm.wp_addr = edwar;
1013         }
1014
1015         retval = armv8_dpm_read_current_registers(&armv8->dpm);
1016
1017         if (retval == ERROR_OK && armv8->post_debug_entry)
1018                 retval = armv8->post_debug_entry(target);
1019
1020         return retval;
1021 }
1022
1023 static int aarch64_post_debug_entry(struct target *target)
1024 {
1025         struct aarch64_common *aarch64 = target_to_aarch64(target);
1026         struct armv8_common *armv8 = &aarch64->armv8_common;
1027         int retval;
1028         enum arm_mode target_mode = ARM_MODE_ANY;
1029         uint32_t instr;
1030
1031         switch (armv8->arm.core_mode) {
1032         case ARMV8_64_EL0T:
1033                 target_mode = ARMV8_64_EL1H;
1034                 /* fall through */
1035         case ARMV8_64_EL1T:
1036         case ARMV8_64_EL1H:
1037                 instr = ARMV8_MRS(SYSTEM_SCTLR_EL1, 0);
1038                 break;
1039         case ARMV8_64_EL2T:
1040         case ARMV8_64_EL2H:
1041                 instr = ARMV8_MRS(SYSTEM_SCTLR_EL2, 0);
1042                 break;
1043         case ARMV8_64_EL3H:
1044         case ARMV8_64_EL3T:
1045                 instr = ARMV8_MRS(SYSTEM_SCTLR_EL3, 0);
1046                 break;
1047
1048         case ARM_MODE_SVC:
1049         case ARM_MODE_ABT:
1050         case ARM_MODE_FIQ:
1051         case ARM_MODE_IRQ:
1052         case ARM_MODE_HYP:
1053         case ARM_MODE_UND:
1054         case ARM_MODE_SYS:
1055                 instr = ARMV4_5_MRC(15, 0, 0, 1, 0, 0);
1056                 break;
1057
1058         default:
1059                 LOG_ERROR("cannot read system control register in this mode: (%s : 0x%x)",
1060                                 armv8_mode_name(armv8->arm.core_mode), armv8->arm.core_mode);
1061                 return ERROR_FAIL;
1062         }
1063
1064         if (target_mode != ARM_MODE_ANY)
1065                 armv8_dpm_modeswitch(&armv8->dpm, target_mode);
1066
1067         retval = armv8->dpm.instr_read_data_r0(&armv8->dpm, instr, &aarch64->system_control_reg);
1068         if (retval != ERROR_OK)
1069                 return retval;
1070
1071         if (target_mode != ARM_MODE_ANY)
1072                 armv8_dpm_modeswitch(&armv8->dpm, ARM_MODE_ANY);
1073
1074         LOG_DEBUG("System_register: %8.8" PRIx32, aarch64->system_control_reg);
1075         aarch64->system_control_reg_curr = aarch64->system_control_reg;
1076
1077         if (armv8->armv8_mmu.armv8_cache.info == -1) {
1078                 armv8_identify_cache(armv8);
1079                 armv8_read_mpidr(armv8);
1080         }
1081
1082         armv8->armv8_mmu.mmu_enabled =
1083                         (aarch64->system_control_reg & 0x1U) ? 1 : 0;
1084         armv8->armv8_mmu.armv8_cache.d_u_cache_enabled =
1085                 (aarch64->system_control_reg & 0x4U) ? 1 : 0;
1086         armv8->armv8_mmu.armv8_cache.i_cache_enabled =
1087                 (aarch64->system_control_reg & 0x1000U) ? 1 : 0;
1088         return ERROR_OK;
1089 }
1090
1091 /*
1092  * single-step a target
1093  */
1094 static int aarch64_step(struct target *target, int current, target_addr_t address,
1095         int handle_breakpoints)
1096 {
1097         struct armv8_common *armv8 = target_to_armv8(target);
1098         struct aarch64_common *aarch64 = target_to_aarch64(target);
1099         int saved_retval = ERROR_OK;
1100         int retval;
1101         uint32_t edecr;
1102
1103         armv8->last_run_control_op = ARMV8_RUNCONTROL_STEP;
1104
1105         if (target->state != TARGET_HALTED) {
1106                 LOG_WARNING("target not halted");
1107                 return ERROR_TARGET_NOT_HALTED;
1108         }
1109
1110         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1111                         armv8->debug_base + CPUV8_DBG_EDECR, &edecr);
1112         /* make sure EDECR.SS is not set when restoring the register */
1113
1114         if (retval == ERROR_OK) {
1115                 edecr &= ~0x4;
1116                 /* set EDECR.SS to enter hardware step mode */
1117                 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1118                                 armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4));
1119         }
1120         /* disable interrupts while stepping */
1121         if (retval == ERROR_OK && aarch64->isrmasking_mode == AARCH64_ISRMASK_ON)
1122                 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0x3 << 22);
1123         /* bail out if stepping setup has failed */
1124         if (retval != ERROR_OK)
1125                 return retval;
1126
1127         if (target->smp && (current == 1)) {
1128                 /*
1129                  * isolate current target so that it doesn't get resumed
1130                  * together with the others
1131                  */
1132                 retval = arm_cti_gate_channel(armv8->cti, 1);
1133                 /* resume all other targets in the group */
1134                 if (retval == ERROR_OK)
1135                         retval = aarch64_step_restart_smp(target);
1136                 if (retval != ERROR_OK) {
1137                         LOG_ERROR("Failed to restart non-stepping targets in SMP group");
1138                         return retval;
1139                 }
1140                 LOG_DEBUG("Restarted all non-stepping targets in SMP group");
1141         }
1142
1143         /* all other targets running, restore and restart the current target */
1144         retval = aarch64_restore_one(target, current, &address, 0, 0);
1145         if (retval == ERROR_OK)
1146                 retval = aarch64_restart_one(target, RESTART_LAZY);
1147
1148         if (retval != ERROR_OK)
1149                 return retval;
1150
1151         LOG_DEBUG("target step-resumed at 0x%" PRIx64, address);
1152         if (!handle_breakpoints)
1153                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1154
1155         int64_t then = timeval_ms();
1156         for (;;) {
1157                 int stepped;
1158                 uint32_t prsr;
1159
1160                 retval = aarch64_check_state_one(target,
1161                                         PRSR_SDR|PRSR_HALT, PRSR_SDR|PRSR_HALT, &stepped, &prsr);
1162                 if (retval != ERROR_OK || stepped)
1163                         break;
1164
1165                 if (timeval_ms() > then + 100) {
1166                         LOG_ERROR("timeout waiting for target %s halt after step",
1167                                         target_name(target));
1168                         retval = ERROR_TARGET_TIMEOUT;
1169                         break;
1170                 }
1171         }
1172
1173         /*
1174          * At least on one SoC (Renesas R8A7795) stepping over a WFI instruction
1175          * causes a timeout. The core takes the step but doesn't complete it and so
1176          * debug state is never entered. However, you can manually halt the core
1177          * as an external debug even is also a WFI wakeup event.
1178          */
1179         if (retval == ERROR_TARGET_TIMEOUT)
1180                 saved_retval = aarch64_halt_one(target, HALT_SYNC);
1181
1182         /* restore EDECR */
1183         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1184                         armv8->debug_base + CPUV8_DBG_EDECR, edecr);
1185         if (retval != ERROR_OK)
1186                 return retval;
1187
1188         /* restore interrupts */
1189         if (aarch64->isrmasking_mode == AARCH64_ISRMASK_ON) {
1190                 retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0);
1191                 if (retval != ERROR_OK)
1192                         return ERROR_OK;
1193         }
1194
1195         if (saved_retval != ERROR_OK)
1196                 return saved_retval;
1197
1198         return ERROR_OK;
1199 }
1200
1201 static int aarch64_restore_context(struct target *target, bool bpwp)
1202 {
1203         struct armv8_common *armv8 = target_to_armv8(target);
1204         struct arm *arm = &armv8->arm;
1205
1206         int retval;
1207
1208         LOG_DEBUG("%s", target_name(target));
1209
1210         if (armv8->pre_restore_context)
1211                 armv8->pre_restore_context(target);
1212
1213         retval = armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
1214         if (retval == ERROR_OK) {
1215                 /* registers are now invalid */
1216                 register_cache_invalidate(arm->core_cache);
1217                 register_cache_invalidate(arm->core_cache->next);
1218         }
1219
1220         return retval;
1221 }
1222
1223 /*
1224  * Cortex-A8 Breakpoint and watchpoint functions
1225  */
1226
1227 /* Setup hardware Breakpoint Register Pair */
1228 static int aarch64_set_breakpoint(struct target *target,
1229         struct breakpoint *breakpoint, uint8_t matchmode)
1230 {
1231         int retval;
1232         int brp_i = 0;
1233         uint32_t control;
1234         uint8_t byte_addr_select = 0x0F;
1235         struct aarch64_common *aarch64 = target_to_aarch64(target);
1236         struct armv8_common *armv8 = &aarch64->armv8_common;
1237         struct aarch64_brp *brp_list = aarch64->brp_list;
1238
1239         if (breakpoint->is_set) {
1240                 LOG_WARNING("breakpoint already set");
1241                 return ERROR_OK;
1242         }
1243
1244         if (breakpoint->type == BKPT_HARD) {
1245                 int64_t bpt_value;
1246                 while (brp_list[brp_i].used && (brp_i < aarch64->brp_num))
1247                         brp_i++;
1248                 if (brp_i >= aarch64->brp_num) {
1249                         LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1250                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1251                 }
1252                 breakpoint_hw_set(breakpoint, brp_i);
1253                 if (breakpoint->length == 2)
1254                         byte_addr_select = (3 << (breakpoint->address & 0x02));
1255                 control = ((matchmode & 0x7) << 20)
1256                         | (1 << 13)
1257                         | (byte_addr_select << 5)
1258                         | (3 << 1) | 1;
1259                 brp_list[brp_i].used = 1;
1260                 brp_list[brp_i].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1261                 brp_list[brp_i].control = control;
1262                 bpt_value = brp_list[brp_i].value;
1263
1264                 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1265                                 + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].brpn,
1266                                 (uint32_t)(bpt_value & 0xFFFFFFFF));
1267                 if (retval != ERROR_OK)
1268                         return retval;
1269                 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1270                                 + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].brpn,
1271                                 (uint32_t)(bpt_value >> 32));
1272                 if (retval != ERROR_OK)
1273                         return retval;
1274
1275                 retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1276                                 + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].brpn,
1277                                 brp_list[brp_i].control);
1278                 if (retval != ERROR_OK)
1279                         return retval;
1280                 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1281                         brp_list[brp_i].control,
1282                         brp_list[brp_i].value);
1283
1284         } else if (breakpoint->type == BKPT_SOFT) {
1285                 uint32_t opcode;
1286                 uint8_t code[4];
1287
1288                 if (armv8_dpm_get_core_state(&armv8->dpm) == ARM_STATE_AARCH64) {
1289                         opcode = ARMV8_HLT(11);
1290
1291                         if (breakpoint->length != 4)
1292                                 LOG_ERROR("bug: breakpoint length should be 4 in AArch64 mode");
1293                 } else {
1294                         /**
1295                          * core_state is ARM_STATE_ARM
1296                          * in that case the opcode depends on breakpoint length:
1297                          *  - if length == 4 => A32 opcode
1298                          *  - if length == 2 => T32 opcode
1299                          *  - if length == 3 => T32 opcode (refer to gdb doc : ARM-Breakpoint-Kinds)
1300                          *    in that case the length should be changed from 3 to 4 bytes
1301                          **/
1302                         opcode = (breakpoint->length == 4) ? ARMV8_HLT_A1(11) :
1303                                         (uint32_t) (ARMV8_HLT_T1(11) | ARMV8_HLT_T1(11) << 16);
1304
1305                         if (breakpoint->length == 3)
1306                                 breakpoint->length = 4;
1307                 }
1308
1309                 buf_set_u32(code, 0, 32, opcode);
1310
1311                 retval = target_read_memory(target,
1312                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1313                                 breakpoint->length, 1,
1314                                 breakpoint->orig_instr);
1315                 if (retval != ERROR_OK)
1316                         return retval;
1317
1318                 armv8_cache_d_inner_flush_virt(armv8,
1319                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1320                                 breakpoint->length);
1321
1322                 retval = target_write_memory(target,
1323                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1324                                 breakpoint->length, 1, code);
1325                 if (retval != ERROR_OK)
1326                         return retval;
1327
1328                 armv8_cache_d_inner_flush_virt(armv8,
1329                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1330                                 breakpoint->length);
1331
1332                 armv8_cache_i_inner_inval_virt(armv8,
1333                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1334                                 breakpoint->length);
1335
1336                 breakpoint->is_set = true;
1337         }
1338
1339         /* Ensure that halting debug mode is enable */
1340         retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
1341         if (retval != ERROR_OK) {
1342                 LOG_DEBUG("Failed to set DSCR.HDE");
1343                 return retval;
1344         }
1345
1346         return ERROR_OK;
1347 }
1348
1349 static int aarch64_set_context_breakpoint(struct target *target,
1350         struct breakpoint *breakpoint, uint8_t matchmode)
1351 {
1352         int retval = ERROR_FAIL;
1353         int brp_i = 0;
1354         uint32_t control;
1355         uint8_t byte_addr_select = 0x0F;
1356         struct aarch64_common *aarch64 = target_to_aarch64(target);
1357         struct armv8_common *armv8 = &aarch64->armv8_common;
1358         struct aarch64_brp *brp_list = aarch64->brp_list;
1359
1360         if (breakpoint->is_set) {
1361                 LOG_WARNING("breakpoint already set");
1362                 return retval;
1363         }
1364         /*check available context BRPs*/
1365         while ((brp_list[brp_i].used ||
1366                 (brp_list[brp_i].type != BRP_CONTEXT)) && (brp_i < aarch64->brp_num))
1367                 brp_i++;
1368
1369         if (brp_i >= aarch64->brp_num) {
1370                 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1371                 return ERROR_FAIL;
1372         }
1373
1374         breakpoint_hw_set(breakpoint, brp_i);
1375         control = ((matchmode & 0x7) << 20)
1376                 | (1 << 13)
1377                 | (byte_addr_select << 5)
1378                 | (3 << 1) | 1;
1379         brp_list[brp_i].used = 1;
1380         brp_list[brp_i].value = (breakpoint->asid);
1381         brp_list[brp_i].control = control;
1382         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1383                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].brpn,
1384                         brp_list[brp_i].value);
1385         if (retval != ERROR_OK)
1386                 return retval;
1387         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1388                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].brpn,
1389                         brp_list[brp_i].control);
1390         if (retval != ERROR_OK)
1391                 return retval;
1392         LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1393                 brp_list[brp_i].control,
1394                 brp_list[brp_i].value);
1395         return ERROR_OK;
1396
1397 }
1398
1399 static int aarch64_set_hybrid_breakpoint(struct target *target, struct breakpoint *breakpoint)
1400 {
1401         int retval = ERROR_FAIL;
1402         int brp_1 = 0;  /* holds the contextID pair */
1403         int brp_2 = 0;  /* holds the IVA pair */
1404         uint32_t control_ctx, control_iva;
1405         uint8_t ctx_byte_addr_select = 0x0F;
1406         uint8_t iva_byte_addr_select = 0x0F;
1407         uint8_t ctx_machmode = 0x03;
1408         uint8_t iva_machmode = 0x01;
1409         struct aarch64_common *aarch64 = target_to_aarch64(target);
1410         struct armv8_common *armv8 = &aarch64->armv8_common;
1411         struct aarch64_brp *brp_list = aarch64->brp_list;
1412
1413         if (breakpoint->is_set) {
1414                 LOG_WARNING("breakpoint already set");
1415                 return retval;
1416         }
1417         /*check available context BRPs*/
1418         while ((brp_list[brp_1].used ||
1419                 (brp_list[brp_1].type != BRP_CONTEXT)) && (brp_1 < aarch64->brp_num))
1420                 brp_1++;
1421
1422         LOG_DEBUG("brp(CTX) found num: %d", brp_1);
1423         if (brp_1 >= aarch64->brp_num) {
1424                 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1425                 return ERROR_FAIL;
1426         }
1427
1428         while ((brp_list[brp_2].used ||
1429                 (brp_list[brp_2].type != BRP_NORMAL)) && (brp_2 < aarch64->brp_num))
1430                 brp_2++;
1431
1432         LOG_DEBUG("brp(IVA) found num: %d", brp_2);
1433         if (brp_2 >= aarch64->brp_num) {
1434                 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1435                 return ERROR_FAIL;
1436         }
1437
1438         breakpoint_hw_set(breakpoint, brp_1);
1439         breakpoint->linked_brp = brp_2;
1440         control_ctx = ((ctx_machmode & 0x7) << 20)
1441                 | (brp_2 << 16)
1442                 | (0 << 14)
1443                 | (ctx_byte_addr_select << 5)
1444                 | (3 << 1) | 1;
1445         brp_list[brp_1].used = 1;
1446         brp_list[brp_1].value = (breakpoint->asid);
1447         brp_list[brp_1].control = control_ctx;
1448         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1449                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_1].brpn,
1450                         brp_list[brp_1].value);
1451         if (retval != ERROR_OK)
1452                 return retval;
1453         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1454                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_1].brpn,
1455                         brp_list[brp_1].control);
1456         if (retval != ERROR_OK)
1457                 return retval;
1458
1459         control_iva = ((iva_machmode & 0x7) << 20)
1460                 | (brp_1 << 16)
1461                 | (1 << 13)
1462                 | (iva_byte_addr_select << 5)
1463                 | (3 << 1) | 1;
1464         brp_list[brp_2].used = 1;
1465         brp_list[brp_2].value = breakpoint->address & 0xFFFFFFFFFFFFFFFC;
1466         brp_list[brp_2].control = control_iva;
1467         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1468                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_2].brpn,
1469                         brp_list[brp_2].value & 0xFFFFFFFF);
1470         if (retval != ERROR_OK)
1471                 return retval;
1472         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1473                         + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_2].brpn,
1474                         brp_list[brp_2].value >> 32);
1475         if (retval != ERROR_OK)
1476                 return retval;
1477         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1478                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_2].brpn,
1479                         brp_list[brp_2].control);
1480         if (retval != ERROR_OK)
1481                 return retval;
1482
1483         return ERROR_OK;
1484 }
1485
1486 static int aarch64_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1487 {
1488         int retval;
1489         struct aarch64_common *aarch64 = target_to_aarch64(target);
1490         struct armv8_common *armv8 = &aarch64->armv8_common;
1491         struct aarch64_brp *brp_list = aarch64->brp_list;
1492
1493         if (!breakpoint->is_set) {
1494                 LOG_WARNING("breakpoint not set");
1495                 return ERROR_OK;
1496         }
1497
1498         if (breakpoint->type == BKPT_HARD) {
1499                 if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
1500                         int brp_i = breakpoint->number;
1501                         int brp_j = breakpoint->linked_brp;
1502                         if (brp_i >= aarch64->brp_num) {
1503                                 LOG_DEBUG("Invalid BRP number in breakpoint");
1504                                 return ERROR_OK;
1505                         }
1506                         LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, brp_i,
1507                                 brp_list[brp_i].control, brp_list[brp_i].value);
1508                         brp_list[brp_i].used = 0;
1509                         brp_list[brp_i].value = 0;
1510                         brp_list[brp_i].control = 0;
1511                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1512                                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].brpn,
1513                                         brp_list[brp_i].control);
1514                         if (retval != ERROR_OK)
1515                                 return retval;
1516                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1517                                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].brpn,
1518                                         (uint32_t)brp_list[brp_i].value);
1519                         if (retval != ERROR_OK)
1520                                 return retval;
1521                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1522                                         + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].brpn,
1523                                         (uint32_t)brp_list[brp_i].value);
1524                         if (retval != ERROR_OK)
1525                                 return retval;
1526                         if ((brp_j < 0) || (brp_j >= aarch64->brp_num)) {
1527                                 LOG_DEBUG("Invalid BRP number in breakpoint");
1528                                 return ERROR_OK;
1529                         }
1530                         LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_j,
1531                                 brp_list[brp_j].control, brp_list[brp_j].value);
1532                         brp_list[brp_j].used = 0;
1533                         brp_list[brp_j].value = 0;
1534                         brp_list[brp_j].control = 0;
1535                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1536                                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_j].brpn,
1537                                         brp_list[brp_j].control);
1538                         if (retval != ERROR_OK)
1539                                 return retval;
1540                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1541                                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_j].brpn,
1542                                         (uint32_t)brp_list[brp_j].value);
1543                         if (retval != ERROR_OK)
1544                                 return retval;
1545                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1546                                         + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_j].brpn,
1547                                         (uint32_t)brp_list[brp_j].value);
1548                         if (retval != ERROR_OK)
1549                                 return retval;
1550
1551                         breakpoint->linked_brp = 0;
1552                         breakpoint->is_set = false;
1553                         return ERROR_OK;
1554
1555                 } else {
1556                         int brp_i = breakpoint->number;
1557                         if (brp_i >= aarch64->brp_num) {
1558                                 LOG_DEBUG("Invalid BRP number in breakpoint");
1559                                 return ERROR_OK;
1560                         }
1561                         LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, brp_i,
1562                                 brp_list[brp_i].control, brp_list[brp_i].value);
1563                         brp_list[brp_i].used = 0;
1564                         brp_list[brp_i].value = 0;
1565                         brp_list[brp_i].control = 0;
1566                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1567                                         + CPUV8_DBG_BCR_BASE + 16 * brp_list[brp_i].brpn,
1568                                         brp_list[brp_i].control);
1569                         if (retval != ERROR_OK)
1570                                 return retval;
1571                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1572                                         + CPUV8_DBG_BVR_BASE + 16 * brp_list[brp_i].brpn,
1573                                         brp_list[brp_i].value);
1574                         if (retval != ERROR_OK)
1575                                 return retval;
1576
1577                         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1578                                         + CPUV8_DBG_BVR_BASE + 4 + 16 * brp_list[brp_i].brpn,
1579                                         (uint32_t)brp_list[brp_i].value);
1580                         if (retval != ERROR_OK)
1581                                 return retval;
1582                         breakpoint->is_set = false;
1583                         return ERROR_OK;
1584                 }
1585         } else {
1586                 /* restore original instruction (kept in target endianness) */
1587
1588                 armv8_cache_d_inner_flush_virt(armv8,
1589                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1590                                 breakpoint->length);
1591
1592                 if (breakpoint->length == 4) {
1593                         retval = target_write_memory(target,
1594                                         breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1595                                         4, 1, breakpoint->orig_instr);
1596                         if (retval != ERROR_OK)
1597                                 return retval;
1598                 } else {
1599                         retval = target_write_memory(target,
1600                                         breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1601                                         2, 1, breakpoint->orig_instr);
1602                         if (retval != ERROR_OK)
1603                                 return retval;
1604                 }
1605
1606                 armv8_cache_d_inner_flush_virt(armv8,
1607                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1608                                 breakpoint->length);
1609
1610                 armv8_cache_i_inner_inval_virt(armv8,
1611                                 breakpoint->address & 0xFFFFFFFFFFFFFFFE,
1612                                 breakpoint->length);
1613         }
1614         breakpoint->is_set = false;
1615
1616         return ERROR_OK;
1617 }
1618
1619 static int aarch64_add_breakpoint(struct target *target,
1620         struct breakpoint *breakpoint)
1621 {
1622         struct aarch64_common *aarch64 = target_to_aarch64(target);
1623
1624         if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1625                 LOG_INFO("no hardware breakpoint available");
1626                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1627         }
1628
1629         if (breakpoint->type == BKPT_HARD)
1630                 aarch64->brp_num_available--;
1631
1632         return aarch64_set_breakpoint(target, breakpoint, 0x00);        /* Exact match */
1633 }
1634
1635 static int aarch64_add_context_breakpoint(struct target *target,
1636         struct breakpoint *breakpoint)
1637 {
1638         struct aarch64_common *aarch64 = target_to_aarch64(target);
1639
1640         if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1641                 LOG_INFO("no hardware breakpoint available");
1642                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1643         }
1644
1645         if (breakpoint->type == BKPT_HARD)
1646                 aarch64->brp_num_available--;
1647
1648         return aarch64_set_context_breakpoint(target, breakpoint, 0x02);        /* asid match */
1649 }
1650
1651 static int aarch64_add_hybrid_breakpoint(struct target *target,
1652         struct breakpoint *breakpoint)
1653 {
1654         struct aarch64_common *aarch64 = target_to_aarch64(target);
1655
1656         if ((breakpoint->type == BKPT_HARD) && (aarch64->brp_num_available < 1)) {
1657                 LOG_INFO("no hardware breakpoint available");
1658                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1659         }
1660
1661         if (breakpoint->type == BKPT_HARD)
1662                 aarch64->brp_num_available--;
1663
1664         return aarch64_set_hybrid_breakpoint(target, breakpoint);       /* ??? */
1665 }
1666
1667 static int aarch64_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1668 {
1669         struct aarch64_common *aarch64 = target_to_aarch64(target);
1670
1671 #if 0
1672 /* It is perfectly possible to remove breakpoints while the target is running */
1673         if (target->state != TARGET_HALTED) {
1674                 LOG_WARNING("target not halted");
1675                 return ERROR_TARGET_NOT_HALTED;
1676         }
1677 #endif
1678
1679         if (breakpoint->is_set) {
1680                 aarch64_unset_breakpoint(target, breakpoint);
1681                 if (breakpoint->type == BKPT_HARD)
1682                         aarch64->brp_num_available++;
1683         }
1684
1685         return ERROR_OK;
1686 }
1687
1688 /* Setup hardware Watchpoint Register Pair */
1689 static int aarch64_set_watchpoint(struct target *target,
1690         struct watchpoint *watchpoint)
1691 {
1692         int retval;
1693         int wp_i = 0;
1694         uint32_t control, offset, length;
1695         struct aarch64_common *aarch64 = target_to_aarch64(target);
1696         struct armv8_common *armv8 = &aarch64->armv8_common;
1697         struct aarch64_brp *wp_list = aarch64->wp_list;
1698
1699         if (watchpoint->is_set) {
1700                 LOG_WARNING("watchpoint already set");
1701                 return ERROR_OK;
1702         }
1703
1704         while (wp_list[wp_i].used && (wp_i < aarch64->wp_num))
1705                 wp_i++;
1706         if (wp_i >= aarch64->wp_num) {
1707                 LOG_ERROR("ERROR Can not find free Watchpoint Register Pair");
1708                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1709         }
1710
1711         control = (1 << 0)      /* enable */
1712                 | (3 << 1)      /* both user and privileged access */
1713                 | (1 << 13);    /* higher mode control */
1714
1715         switch (watchpoint->rw) {
1716         case WPT_READ:
1717                 control |= 1 << 3;
1718                 break;
1719         case WPT_WRITE:
1720                 control |= 2 << 3;
1721                 break;
1722         case WPT_ACCESS:
1723                 control |= 3 << 3;
1724                 break;
1725         }
1726
1727         /* Match up to 8 bytes. */
1728         offset = watchpoint->address & 7;
1729         length = watchpoint->length;
1730         if (offset + length > sizeof(uint64_t)) {
1731                 length = sizeof(uint64_t) - offset;
1732                 LOG_WARNING("Adjust watchpoint match inside 8-byte boundary");
1733         }
1734         for (; length > 0; offset++, length--)
1735                 control |= (1 << offset) << 5;
1736
1737         wp_list[wp_i].value = watchpoint->address & 0xFFFFFFFFFFFFFFF8ULL;
1738         wp_list[wp_i].control = control;
1739
1740         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1741                         + CPUV8_DBG_WVR_BASE + 16 * wp_list[wp_i].brpn,
1742                         (uint32_t)(wp_list[wp_i].value & 0xFFFFFFFF));
1743         if (retval != ERROR_OK)
1744                 return retval;
1745         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1746                         + CPUV8_DBG_WVR_BASE + 4 + 16 * wp_list[wp_i].brpn,
1747                         (uint32_t)(wp_list[wp_i].value >> 32));
1748         if (retval != ERROR_OK)
1749                 return retval;
1750
1751         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1752                         + CPUV8_DBG_WCR_BASE + 16 * wp_list[wp_i].brpn,
1753                         control);
1754         if (retval != ERROR_OK)
1755                 return retval;
1756         LOG_DEBUG("wp %i control 0x%0" PRIx32 " value 0x%" TARGET_PRIxADDR, wp_i,
1757                 wp_list[wp_i].control, wp_list[wp_i].value);
1758
1759         /* Ensure that halting debug mode is enable */
1760         retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
1761         if (retval != ERROR_OK) {
1762                 LOG_DEBUG("Failed to set DSCR.HDE");
1763                 return retval;
1764         }
1765
1766         wp_list[wp_i].used = 1;
1767         watchpoint_set(watchpoint, wp_i);
1768
1769         return ERROR_OK;
1770 }
1771
1772 /* Clear hardware Watchpoint Register Pair */
1773 static int aarch64_unset_watchpoint(struct target *target,
1774         struct watchpoint *watchpoint)
1775 {
1776         int retval;
1777         struct aarch64_common *aarch64 = target_to_aarch64(target);
1778         struct armv8_common *armv8 = &aarch64->armv8_common;
1779         struct aarch64_brp *wp_list = aarch64->wp_list;
1780
1781         if (!watchpoint->is_set) {
1782                 LOG_WARNING("watchpoint not set");
1783                 return ERROR_OK;
1784         }
1785
1786         int wp_i = watchpoint->number;
1787         if (wp_i >= aarch64->wp_num) {
1788                 LOG_DEBUG("Invalid WP number in watchpoint");
1789                 return ERROR_OK;
1790         }
1791         LOG_DEBUG("rwp %i control 0x%0" PRIx32 " value 0x%0" PRIx64, wp_i,
1792                 wp_list[wp_i].control, wp_list[wp_i].value);
1793         wp_list[wp_i].used = 0;
1794         wp_list[wp_i].value = 0;
1795         wp_list[wp_i].control = 0;
1796         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1797                         + CPUV8_DBG_WCR_BASE + 16 * wp_list[wp_i].brpn,
1798                         wp_list[wp_i].control);
1799         if (retval != ERROR_OK)
1800                 return retval;
1801         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1802                         + CPUV8_DBG_WVR_BASE + 16 * wp_list[wp_i].brpn,
1803                         wp_list[wp_i].value);
1804         if (retval != ERROR_OK)
1805                 return retval;
1806
1807         retval = aarch64_dap_write_memap_register_u32(target, armv8->debug_base
1808                         + CPUV8_DBG_WVR_BASE + 4 + 16 * wp_list[wp_i].brpn,
1809                         (uint32_t)wp_list[wp_i].value);
1810         if (retval != ERROR_OK)
1811                 return retval;
1812         watchpoint->is_set = false;
1813
1814         return ERROR_OK;
1815 }
1816
1817 static int aarch64_add_watchpoint(struct target *target,
1818         struct watchpoint *watchpoint)
1819 {
1820         int retval;
1821         struct aarch64_common *aarch64 = target_to_aarch64(target);
1822
1823         if (aarch64->wp_num_available < 1) {
1824                 LOG_INFO("no hardware watchpoint available");
1825                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1826         }
1827
1828         retval = aarch64_set_watchpoint(target, watchpoint);
1829         if (retval == ERROR_OK)
1830                 aarch64->wp_num_available--;
1831
1832         return retval;
1833 }
1834
1835 static int aarch64_remove_watchpoint(struct target *target,
1836         struct watchpoint *watchpoint)
1837 {
1838         struct aarch64_common *aarch64 = target_to_aarch64(target);
1839
1840         if (watchpoint->is_set) {
1841                 aarch64_unset_watchpoint(target, watchpoint);
1842                 aarch64->wp_num_available++;
1843         }
1844
1845         return ERROR_OK;
1846 }
1847
1848 /**
1849  * find out which watchpoint hits
1850  * get exception address and compare the address to watchpoints
1851  */
1852 int aarch64_hit_watchpoint(struct target *target,
1853         struct watchpoint **hit_watchpoint)
1854 {
1855         if (target->debug_reason != DBG_REASON_WATCHPOINT)
1856                 return ERROR_FAIL;
1857
1858         struct armv8_common *armv8 = target_to_armv8(target);
1859
1860         target_addr_t exception_address;
1861         struct watchpoint *wp;
1862
1863         exception_address = armv8->dpm.wp_addr;
1864
1865         if (exception_address == 0xFFFFFFFF)
1866                 return ERROR_FAIL;
1867
1868         for (wp = target->watchpoints; wp; wp = wp->next)
1869                 if (exception_address >= wp->address && exception_address < (wp->address + wp->length)) {
1870                         *hit_watchpoint = wp;
1871                         return ERROR_OK;
1872                 }
1873
1874         return ERROR_FAIL;
1875 }
1876
1877 /*
1878  * Cortex-A8 Reset functions
1879  */
1880
1881 static int aarch64_enable_reset_catch(struct target *target, bool enable)
1882 {
1883         struct armv8_common *armv8 = target_to_armv8(target);
1884         uint32_t edecr;
1885         int retval;
1886
1887         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1888                         armv8->debug_base + CPUV8_DBG_EDECR, &edecr);
1889         LOG_DEBUG("EDECR = 0x%08" PRIx32 ", enable=%d", edecr, enable);
1890         if (retval != ERROR_OK)
1891                 return retval;
1892
1893         if (enable)
1894                 edecr |= ECR_RCE;
1895         else
1896                 edecr &= ~ECR_RCE;
1897
1898         return mem_ap_write_atomic_u32(armv8->debug_ap,
1899                         armv8->debug_base + CPUV8_DBG_EDECR, edecr);
1900 }
1901
1902 static int aarch64_clear_reset_catch(struct target *target)
1903 {
1904         struct armv8_common *armv8 = target_to_armv8(target);
1905         uint32_t edesr;
1906         int retval;
1907         bool was_triggered;
1908
1909         /* check if Reset Catch debug event triggered as expected */
1910         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
1911                 armv8->debug_base + CPUV8_DBG_EDESR, &edesr);
1912         if (retval != ERROR_OK)
1913                 return retval;
1914
1915         was_triggered = !!(edesr & ESR_RC);
1916         LOG_DEBUG("Reset Catch debug event %s",
1917                         was_triggered ? "triggered" : "NOT triggered!");
1918
1919         if (was_triggered) {
1920                 /* clear pending Reset Catch debug event */
1921                 edesr &= ~ESR_RC;
1922                 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
1923                         armv8->debug_base + CPUV8_DBG_EDESR, edesr);
1924                 if (retval != ERROR_OK)
1925                         return retval;
1926         }
1927
1928         return ERROR_OK;
1929 }
1930
1931 static int aarch64_assert_reset(struct target *target)
1932 {
1933         struct armv8_common *armv8 = target_to_armv8(target);
1934         enum reset_types reset_config = jtag_get_reset_config();
1935         int retval;
1936
1937         LOG_DEBUG(" ");
1938
1939         /* Issue some kind of warm reset. */
1940         if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT))
1941                 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1942         else if (reset_config & RESET_HAS_SRST) {
1943                 bool srst_asserted = false;
1944
1945                 if (target->reset_halt) {
1946                         if (target_was_examined(target)) {
1947
1948                                 if (reset_config & RESET_SRST_NO_GATING) {
1949                                         /*
1950                                          * SRST needs to be asserted *before* Reset Catch
1951                                          * debug event can be set up.
1952                                          */
1953                                         adapter_assert_reset();
1954                                         srst_asserted = true;
1955
1956                                         /* make sure to clear all sticky errors */
1957                                         mem_ap_write_atomic_u32(armv8->debug_ap,
1958                                                         armv8->debug_base + CPUV8_DBG_DRCR, DRCR_CSE);
1959                                 }
1960
1961                                 /* set up Reset Catch debug event to halt the CPU after reset */
1962                                 retval = aarch64_enable_reset_catch(target, true);
1963                                 if (retval != ERROR_OK)
1964                                         LOG_WARNING("%s: Error enabling Reset Catch debug event; the CPU will not halt immediately after reset!",
1965                                                         target_name(target));
1966                         } else {
1967                                 LOG_WARNING("%s: Target not examined, will not halt immediately after reset!",
1968                                                 target_name(target));
1969                         }
1970                 }
1971
1972                 /* REVISIT handle "pulls" cases, if there's
1973                  * hardware that needs them to work.
1974                  */
1975                 if (!srst_asserted)
1976                         adapter_assert_reset();
1977         } else {
1978                 LOG_ERROR("%s: how to reset?", target_name(target));
1979                 return ERROR_FAIL;
1980         }
1981
1982         /* registers are now invalid */
1983         if (target_was_examined(target)) {
1984                 register_cache_invalidate(armv8->arm.core_cache);
1985                 register_cache_invalidate(armv8->arm.core_cache->next);
1986         }
1987
1988         target->state = TARGET_RESET;
1989
1990         return ERROR_OK;
1991 }
1992
1993 static int aarch64_deassert_reset(struct target *target)
1994 {
1995         int retval;
1996
1997         LOG_DEBUG(" ");
1998
1999         /* be certain SRST is off */
2000         adapter_deassert_reset();
2001
2002         if (!target_was_examined(target))
2003                 return ERROR_OK;
2004
2005         retval = aarch64_init_debug_access(target);
2006         if (retval != ERROR_OK)
2007                 return retval;
2008
2009         retval = aarch64_poll(target);
2010         if (retval != ERROR_OK)
2011                 return retval;
2012
2013         if (target->reset_halt) {
2014                 /* clear pending Reset Catch debug event */
2015                 retval = aarch64_clear_reset_catch(target);
2016                 if (retval != ERROR_OK)
2017                         LOG_WARNING("%s: Clearing Reset Catch debug event failed",
2018                                         target_name(target));
2019
2020                 /* disable Reset Catch debug event */
2021                 retval = aarch64_enable_reset_catch(target, false);
2022                 if (retval != ERROR_OK)
2023                         LOG_WARNING("%s: Disabling Reset Catch debug event failed",
2024                                         target_name(target));
2025
2026                 if (target->state != TARGET_HALTED) {
2027                         LOG_WARNING("%s: ran after reset and before halt ...",
2028                                 target_name(target));
2029                         if (target_was_examined(target)) {
2030                                 retval = aarch64_halt_one(target, HALT_LAZY);
2031                                 if (retval != ERROR_OK)
2032                                         return retval;
2033                         } else {
2034                                 target->state = TARGET_UNKNOWN;
2035                         }
2036                 }
2037         }
2038
2039         return ERROR_OK;
2040 }
2041
2042 static int aarch64_write_cpu_memory_slow(struct target *target,
2043         uint32_t size, uint32_t count, const uint8_t *buffer, uint32_t *dscr)
2044 {
2045         struct armv8_common *armv8 = target_to_armv8(target);
2046         struct arm_dpm *dpm = &armv8->dpm;
2047         struct arm *arm = &armv8->arm;
2048         int retval;
2049
2050         armv8_reg_current(arm, 1)->dirty = true;
2051
2052         /* change DCC to normal mode if necessary */
2053         if (*dscr & DSCR_MA) {
2054                 *dscr &= ~DSCR_MA;
2055                 retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2056                                 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2057                 if (retval != ERROR_OK)
2058                         return retval;
2059         }
2060
2061         while (count) {
2062                 uint32_t data, opcode;
2063
2064                 /* write the data to store into DTRRX */
2065                 if (size == 1)
2066                         data = *buffer;
2067                 else if (size == 2)
2068                         data = target_buffer_get_u16(target, buffer);
2069                 else
2070                         data = target_buffer_get_u32(target, buffer);
2071                 retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2072                                 armv8->debug_base + CPUV8_DBG_DTRRX, data);
2073                 if (retval != ERROR_OK)
2074                         return retval;
2075
2076                 if (arm->core_state == ARM_STATE_AARCH64)
2077                         retval = dpm->instr_execute(dpm, ARMV8_MRS(SYSTEM_DBG_DTRRX_EL0, 1));
2078                 else
2079                         retval = dpm->instr_execute(dpm, ARMV4_5_MRC(14, 0, 1, 0, 5, 0));
2080                 if (retval != ERROR_OK)
2081                         return retval;
2082
2083                 if (size == 1)
2084                         opcode = armv8_opcode(armv8, ARMV8_OPC_STRB_IP);
2085                 else if (size == 2)
2086                         opcode = armv8_opcode(armv8, ARMV8_OPC_STRH_IP);
2087                 else
2088                         opcode = armv8_opcode(armv8, ARMV8_OPC_STRW_IP);
2089                 retval = dpm->instr_execute(dpm, opcode);
2090                 if (retval != ERROR_OK)
2091                         return retval;
2092
2093                 /* Advance */
2094                 buffer += size;
2095                 --count;
2096         }
2097
2098         return ERROR_OK;
2099 }
2100
2101 static int aarch64_write_cpu_memory_fast(struct target *target,
2102         uint32_t count, const uint8_t *buffer, uint32_t *dscr)
2103 {
2104         struct armv8_common *armv8 = target_to_armv8(target);
2105         struct arm *arm = &armv8->arm;
2106         int retval;
2107
2108         armv8_reg_current(arm, 1)->dirty = true;
2109
2110         /* Step 1.d   - Change DCC to memory mode */
2111         *dscr |= DSCR_MA;
2112         retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2113                         armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2114         if (retval != ERROR_OK)
2115                 return retval;
2116
2117
2118         /* Step 2.a   - Do the write */
2119         retval = mem_ap_write_buf_noincr(armv8->debug_ap,
2120                                         buffer, 4, count, armv8->debug_base + CPUV8_DBG_DTRRX);
2121         if (retval != ERROR_OK)
2122                 return retval;
2123
2124         /* Step 3.a   - Switch DTR mode back to Normal mode */
2125         *dscr &= ~DSCR_MA;
2126         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2127                                 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2128         if (retval != ERROR_OK)
2129                 return retval;
2130
2131         return ERROR_OK;
2132 }
2133
2134 static int aarch64_write_cpu_memory(struct target *target,
2135         uint64_t address, uint32_t size,
2136         uint32_t count, const uint8_t *buffer)
2137 {
2138         /* write memory through APB-AP */
2139         int retval = ERROR_COMMAND_SYNTAX_ERROR;
2140         struct armv8_common *armv8 = target_to_armv8(target);
2141         struct arm_dpm *dpm = &armv8->dpm;
2142         struct arm *arm = &armv8->arm;
2143         uint32_t dscr;
2144
2145         if (target->state != TARGET_HALTED) {
2146                 LOG_WARNING("target not halted");
2147                 return ERROR_TARGET_NOT_HALTED;
2148         }
2149
2150         /* Mark register X0 as dirty, as it will be used
2151          * for transferring the data.
2152          * It will be restored automatically when exiting
2153          * debug mode
2154          */
2155         armv8_reg_current(arm, 0)->dirty = true;
2156
2157         /* This algorithm comes from DDI0487A.g, chapter J9.1 */
2158
2159         /* Read DSCR */
2160         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2161                         armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2162         if (retval != ERROR_OK)
2163                 return retval;
2164
2165         /* Set Normal access mode  */
2166         dscr = (dscr & ~DSCR_MA);
2167         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2168                         armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2169         if (retval != ERROR_OK)
2170                 return retval;
2171
2172         if (arm->core_state == ARM_STATE_AARCH64) {
2173                 /* Write X0 with value 'address' using write procedure */
2174                 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
2175                 /* Step 1.c   - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
2176                 retval = dpm->instr_write_data_dcc_64(dpm,
2177                                 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), address);
2178         } else {
2179                 /* Write R0 with value 'address' using write procedure */
2180                 /* Step 1.a+b - Write the address for read access into DBGDTRRX */
2181                 /* Step 1.c   - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
2182                 retval = dpm->instr_write_data_dcc(dpm,
2183                                 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address);
2184         }
2185
2186         if (retval != ERROR_OK)
2187                 return retval;
2188
2189         if (size == 4 && (address % 4) == 0)
2190                 retval = aarch64_write_cpu_memory_fast(target, count, buffer, &dscr);
2191         else
2192                 retval = aarch64_write_cpu_memory_slow(target, size, count, buffer, &dscr);
2193
2194         if (retval != ERROR_OK) {
2195                 /* Unset DTR mode */
2196                 mem_ap_read_atomic_u32(armv8->debug_ap,
2197                                         armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2198                 dscr &= ~DSCR_MA;
2199                 mem_ap_write_atomic_u32(armv8->debug_ap,
2200                                         armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2201         }
2202
2203         /* Check for sticky abort flags in the DSCR */
2204         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2205                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2206         if (retval != ERROR_OK)
2207                 return retval;
2208
2209         dpm->dscr = dscr;
2210         if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
2211                 /* Abort occurred - clear it and exit */
2212                 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
2213                 armv8_dpm_handle_exception(dpm, true);
2214                 return ERROR_FAIL;
2215         }
2216
2217         /* Done */
2218         return ERROR_OK;
2219 }
2220
2221 static int aarch64_read_cpu_memory_slow(struct target *target,
2222         uint32_t size, uint32_t count, uint8_t *buffer, uint32_t *dscr)
2223 {
2224         struct armv8_common *armv8 = target_to_armv8(target);
2225         struct arm_dpm *dpm = &armv8->dpm;
2226         struct arm *arm = &armv8->arm;
2227         int retval;
2228
2229         armv8_reg_current(arm, 1)->dirty = true;
2230
2231         /* change DCC to normal mode (if necessary) */
2232         if (*dscr & DSCR_MA) {
2233                 *dscr &= DSCR_MA;
2234                 retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2235                                 armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2236                 if (retval != ERROR_OK)
2237                         return retval;
2238         }
2239
2240         while (count) {
2241                 uint32_t opcode, data;
2242
2243                 if (size == 1)
2244                         opcode = armv8_opcode(armv8, ARMV8_OPC_LDRB_IP);
2245                 else if (size == 2)
2246                         opcode = armv8_opcode(armv8, ARMV8_OPC_LDRH_IP);
2247                 else
2248                         opcode = armv8_opcode(armv8, ARMV8_OPC_LDRW_IP);
2249                 retval = dpm->instr_execute(dpm, opcode);
2250                 if (retval != ERROR_OK)
2251                         return retval;
2252
2253                 if (arm->core_state == ARM_STATE_AARCH64)
2254                         retval = dpm->instr_execute(dpm, ARMV8_MSR_GP(SYSTEM_DBG_DTRTX_EL0, 1));
2255                 else
2256                         retval = dpm->instr_execute(dpm, ARMV4_5_MCR(14, 0, 1, 0, 5, 0));
2257                 if (retval != ERROR_OK)
2258                         return retval;
2259
2260                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2261                                 armv8->debug_base + CPUV8_DBG_DTRTX, &data);
2262                 if (retval != ERROR_OK)
2263                         return retval;
2264
2265                 if (size == 1)
2266                         *buffer = (uint8_t)data;
2267                 else if (size == 2)
2268                         target_buffer_set_u16(target, buffer, (uint16_t)data);
2269                 else
2270                         target_buffer_set_u32(target, buffer, data);
2271
2272                 /* Advance */
2273                 buffer += size;
2274                 --count;
2275         }
2276
2277         return ERROR_OK;
2278 }
2279
2280 static int aarch64_read_cpu_memory_fast(struct target *target,
2281         uint32_t count, uint8_t *buffer, uint32_t *dscr)
2282 {
2283         struct armv8_common *armv8 = target_to_armv8(target);
2284         struct arm_dpm *dpm = &armv8->dpm;
2285         struct arm *arm = &armv8->arm;
2286         int retval;
2287         uint32_t value;
2288
2289         /* Mark X1 as dirty */
2290         armv8_reg_current(arm, 1)->dirty = true;
2291
2292         if (arm->core_state == ARM_STATE_AARCH64) {
2293                 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2294                 retval = dpm->instr_execute(dpm, ARMV8_MSR_GP(SYSTEM_DBG_DBGDTR_EL0, 0));
2295         } else {
2296                 /* Step 1.d - Dummy operation to ensure EDSCR.Txfull == 1 */
2297                 retval = dpm->instr_execute(dpm, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
2298         }
2299
2300         if (retval != ERROR_OK)
2301                 return retval;
2302
2303         /* Step 1.e - Change DCC to memory mode */
2304         *dscr |= DSCR_MA;
2305         retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2306                         armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2307         if (retval != ERROR_OK)
2308                 return retval;
2309
2310         /* Step 1.f - read DBGDTRTX and discard the value */
2311         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2312                         armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2313         if (retval != ERROR_OK)
2314                 return retval;
2315
2316         count--;
2317         /* Read the data - Each read of the DTRTX register causes the instruction to be reissued
2318          * Abort flags are sticky, so can be read at end of transactions
2319          *
2320          * This data is read in aligned to 32 bit boundary.
2321          */
2322
2323         if (count) {
2324                 /* Step 2.a - Loop n-1 times, each read of DBGDTRTX reads the data from [X0] and
2325                  * increments X0 by 4. */
2326                 retval = mem_ap_read_buf_noincr(armv8->debug_ap, buffer, 4, count,
2327                                                                         armv8->debug_base + CPUV8_DBG_DTRTX);
2328                 if (retval != ERROR_OK)
2329                         return retval;
2330         }
2331
2332         /* Step 3.a - set DTR access mode back to Normal mode   */
2333         *dscr &= ~DSCR_MA;
2334         retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2335                                         armv8->debug_base + CPUV8_DBG_DSCR, *dscr);
2336         if (retval != ERROR_OK)
2337                 return retval;
2338
2339         /* Step 3.b - read DBGDTRTX for the final value */
2340         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2341                         armv8->debug_base + CPUV8_DBG_DTRTX, &value);
2342         if (retval != ERROR_OK)
2343                 return retval;
2344
2345         target_buffer_set_u32(target, buffer + count * 4, value);
2346         return retval;
2347 }
2348
2349 static int aarch64_read_cpu_memory(struct target *target,
2350         target_addr_t address, uint32_t size,
2351         uint32_t count, uint8_t *buffer)
2352 {
2353         /* read memory through APB-AP */
2354         int retval = ERROR_COMMAND_SYNTAX_ERROR;
2355         struct armv8_common *armv8 = target_to_armv8(target);
2356         struct arm_dpm *dpm = &armv8->dpm;
2357         struct arm *arm = &armv8->arm;
2358         uint32_t dscr;
2359
2360         LOG_DEBUG("Reading CPU memory address 0x%016" PRIx64 " size %" PRIu32 " count %" PRIu32,
2361                         address, size, count);
2362
2363         if (target->state != TARGET_HALTED) {
2364                 LOG_WARNING("target not halted");
2365                 return ERROR_TARGET_NOT_HALTED;
2366         }
2367
2368         /* Mark register X0 as dirty, as it will be used
2369          * for transferring the data.
2370          * It will be restored automatically when exiting
2371          * debug mode
2372          */
2373         armv8_reg_current(arm, 0)->dirty = true;
2374
2375         /* Read DSCR */
2376         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2377                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2378         if (retval != ERROR_OK)
2379                 return retval;
2380
2381         /* This algorithm comes from DDI0487A.g, chapter J9.1 */
2382
2383         /* Set Normal access mode  */
2384         dscr &= ~DSCR_MA;
2385         retval =  mem_ap_write_atomic_u32(armv8->debug_ap,
2386                         armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2387         if (retval != ERROR_OK)
2388                 return retval;
2389
2390         if (arm->core_state == ARM_STATE_AARCH64) {
2391                 /* Write X0 with value 'address' using write procedure */
2392                 /* Step 1.a+b - Write the address for read access into DBGDTR_EL0 */
2393                 /* Step 1.c   - Copy value from DTR to R0 using instruction mrs DBGDTR_EL0, x0 */
2394                 retval = dpm->instr_write_data_dcc_64(dpm,
2395                                 ARMV8_MRS(SYSTEM_DBG_DBGDTR_EL0, 0), address);
2396         } else {
2397                 /* Write R0 with value 'address' using write procedure */
2398                 /* Step 1.a+b - Write the address for read access into DBGDTRRXint */
2399                 /* Step 1.c   - Copy value from DTR to R0 using instruction mrc DBGDTRTXint, r0 */
2400                 retval = dpm->instr_write_data_dcc(dpm,
2401                                 ARMV4_5_MRC(14, 0, 0, 0, 5, 0), address);
2402         }
2403
2404         if (retval != ERROR_OK)
2405                 return retval;
2406
2407         if (size == 4 && (address % 4) == 0)
2408                 retval = aarch64_read_cpu_memory_fast(target, count, buffer, &dscr);
2409         else
2410                 retval = aarch64_read_cpu_memory_slow(target, size, count, buffer, &dscr);
2411
2412         if (dscr & DSCR_MA) {
2413                 dscr &= ~DSCR_MA;
2414                 mem_ap_write_atomic_u32(armv8->debug_ap,
2415                                         armv8->debug_base + CPUV8_DBG_DSCR, dscr);
2416         }
2417
2418         if (retval != ERROR_OK)
2419                 return retval;
2420
2421         /* Check for sticky abort flags in the DSCR */
2422         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2423                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2424         if (retval != ERROR_OK)
2425                 return retval;
2426
2427         dpm->dscr = dscr;
2428
2429         if (dscr & (DSCR_ERR | DSCR_SYS_ERROR_PEND)) {
2430                 /* Abort occurred - clear it and exit */
2431                 LOG_ERROR("abort occurred - dscr = 0x%08" PRIx32, dscr);
2432                 armv8_dpm_handle_exception(dpm, true);
2433                 return ERROR_FAIL;
2434         }
2435
2436         /* Done */
2437         return ERROR_OK;
2438 }
2439
2440 static int aarch64_read_phys_memory(struct target *target,
2441         target_addr_t address, uint32_t size,
2442         uint32_t count, uint8_t *buffer)
2443 {
2444         int retval = ERROR_COMMAND_SYNTAX_ERROR;
2445
2446         if (count && buffer) {
2447                 /* read memory through APB-AP */
2448                 retval = aarch64_mmu_modify(target, 0);
2449                 if (retval != ERROR_OK)
2450                         return retval;
2451                 retval = aarch64_read_cpu_memory(target, address, size, count, buffer);
2452         }
2453         return retval;
2454 }
2455
2456 static int aarch64_read_memory(struct target *target, target_addr_t address,
2457         uint32_t size, uint32_t count, uint8_t *buffer)
2458 {
2459         int mmu_enabled = 0;
2460         int retval;
2461
2462         /* determine if MMU was enabled on target stop */
2463         retval = aarch64_mmu(target, &mmu_enabled);
2464         if (retval != ERROR_OK)
2465                 return retval;
2466
2467         if (mmu_enabled) {
2468                 /* enable MMU as we could have disabled it for phys access */
2469                 retval = aarch64_mmu_modify(target, 1);
2470                 if (retval != ERROR_OK)
2471                         return retval;
2472         }
2473         return aarch64_read_cpu_memory(target, address, size, count, buffer);
2474 }
2475
2476 static int aarch64_write_phys_memory(struct target *target,
2477         target_addr_t address, uint32_t size,
2478         uint32_t count, const uint8_t *buffer)
2479 {
2480         int retval = ERROR_COMMAND_SYNTAX_ERROR;
2481
2482         if (count && buffer) {
2483                 /* write memory through APB-AP */
2484                 retval = aarch64_mmu_modify(target, 0);
2485                 if (retval != ERROR_OK)
2486                         return retval;
2487                 return aarch64_write_cpu_memory(target, address, size, count, buffer);
2488         }
2489
2490         return retval;
2491 }
2492
2493 static int aarch64_write_memory(struct target *target, target_addr_t address,
2494         uint32_t size, uint32_t count, const uint8_t *buffer)
2495 {
2496         int mmu_enabled = 0;
2497         int retval;
2498
2499         /* determine if MMU was enabled on target stop */
2500         retval = aarch64_mmu(target, &mmu_enabled);
2501         if (retval != ERROR_OK)
2502                 return retval;
2503
2504         if (mmu_enabled) {
2505                 /* enable MMU as we could have disabled it for phys access */
2506                 retval = aarch64_mmu_modify(target, 1);
2507                 if (retval != ERROR_OK)
2508                         return retval;
2509         }
2510         return aarch64_write_cpu_memory(target, address, size, count, buffer);
2511 }
2512
2513 static int aarch64_handle_target_request(void *priv)
2514 {
2515         struct target *target = priv;
2516         struct armv8_common *armv8 = target_to_armv8(target);
2517         int retval;
2518
2519         if (!target_was_examined(target))
2520                 return ERROR_OK;
2521         if (!target->dbg_msg_enabled)
2522                 return ERROR_OK;
2523
2524         if (target->state == TARGET_RUNNING) {
2525                 uint32_t request;
2526                 uint32_t dscr;
2527                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2528                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2529
2530                 /* check if we have data */
2531                 while ((dscr & DSCR_DTR_TX_FULL) && (retval == ERROR_OK)) {
2532                         retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2533                                         armv8->debug_base + CPUV8_DBG_DTRTX, &request);
2534                         if (retval == ERROR_OK) {
2535                                 target_request(target, request);
2536                                 retval = mem_ap_read_atomic_u32(armv8->debug_ap,
2537                                                 armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
2538                         }
2539                 }
2540         }
2541
2542         return ERROR_OK;
2543 }
2544
2545 static int aarch64_examine_first(struct target *target)
2546 {
2547         struct aarch64_common *aarch64 = target_to_aarch64(target);
2548         struct armv8_common *armv8 = &aarch64->armv8_common;
2549         struct adiv5_dap *swjdp = armv8->arm.dap;
2550         struct aarch64_private_config *pc = target->private_config;
2551         int i;
2552         int retval = ERROR_OK;
2553         uint64_t debug, ttypr;
2554         uint32_t cpuid;
2555         uint32_t tmp0, tmp1, tmp2, tmp3;
2556         debug = ttypr = cpuid = 0;
2557
2558         if (!pc)
2559                 return ERROR_FAIL;
2560
2561         if (pc->adiv5_config.ap_num == DP_APSEL_INVALID) {
2562                 /* Search for the APB-AB */
2563                 retval = dap_find_ap(swjdp, AP_TYPE_APB_AP, &armv8->debug_ap);
2564                 if (retval != ERROR_OK) {
2565                         LOG_ERROR("Could not find APB-AP for debug access");
2566                         return retval;
2567                 }
2568         } else {
2569                 armv8->debug_ap = dap_ap(swjdp, pc->adiv5_config.ap_num);
2570         }
2571
2572         retval = mem_ap_init(armv8->debug_ap);
2573         if (retval != ERROR_OK) {
2574                 LOG_ERROR("Could not initialize the APB-AP");
2575                 return retval;
2576         }
2577
2578         armv8->debug_ap->memaccess_tck = 10;
2579
2580         if (!target->dbgbase_set) {
2581                 /* Lookup Processor DAP */
2582                 retval = dap_lookup_cs_component(armv8->debug_ap, ARM_CS_C9_DEVTYPE_CORE_DEBUG,
2583                                 &armv8->debug_base, target->coreid);
2584                 if (retval != ERROR_OK)
2585                         return retval;
2586                 LOG_DEBUG("Detected core %" PRId32 " dbgbase: " TARGET_ADDR_FMT,
2587                                 target->coreid, armv8->debug_base);
2588         } else
2589                 armv8->debug_base = target->dbgbase;
2590
2591         retval = mem_ap_write_atomic_u32(armv8->debug_ap,
2592                         armv8->debug_base + CPUV8_DBG_OSLAR, 0);
2593         if (retval != ERROR_OK) {
2594                 LOG_DEBUG("Examine %s failed", "oslock");
2595                 return retval;
2596         }
2597
2598         retval = mem_ap_read_u32(armv8->debug_ap,
2599                         armv8->debug_base + CPUV8_DBG_MAINID0, &cpuid);
2600         if (retval != ERROR_OK) {
2601                 LOG_DEBUG("Examine %s failed", "CPUID");
2602                 return retval;
2603         }
2604
2605         retval = mem_ap_read_u32(armv8->debug_ap,
2606                         armv8->debug_base + CPUV8_DBG_MEMFEATURE0, &tmp0);
2607         retval += mem_ap_read_u32(armv8->debug_ap,
2608                         armv8->debug_base + CPUV8_DBG_MEMFEATURE0 + 4, &tmp1);
2609         if (retval != ERROR_OK) {
2610                 LOG_DEBUG("Examine %s failed", "Memory Model Type");
2611                 return retval;
2612         }
2613         retval = mem_ap_read_u32(armv8->debug_ap,
2614                         armv8->debug_base + CPUV8_DBG_DBGFEATURE0, &tmp2);
2615         retval += mem_ap_read_u32(armv8->debug_ap,
2616                         armv8->debug_base + CPUV8_DBG_DBGFEATURE0 + 4, &tmp3);
2617         if (retval != ERROR_OK) {
2618                 LOG_DEBUG("Examine %s failed", "ID_AA64DFR0_EL1");
2619                 return retval;
2620         }
2621
2622         retval = dap_run(armv8->debug_ap->dap);
2623         if (retval != ERROR_OK) {
2624                 LOG_ERROR("%s: examination failed\n", target_name(target));
2625                 return retval;
2626         }
2627
2628         ttypr |= tmp1;
2629         ttypr = (ttypr << 32) | tmp0;
2630         debug |= tmp3;
2631         debug = (debug << 32) | tmp2;
2632
2633         LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
2634         LOG_DEBUG("ttypr = 0x%08" PRIx64, ttypr);
2635         LOG_DEBUG("debug = 0x%08" PRIx64, debug);
2636
2637         if (!pc->cti) {
2638                 LOG_TARGET_ERROR(target, "CTI not specified");
2639                 return ERROR_FAIL;
2640         }
2641
2642         armv8->cti = pc->cti;
2643
2644         retval = aarch64_dpm_setup(aarch64, debug);
2645         if (retval != ERROR_OK)
2646                 return retval;
2647
2648         /* Setup Breakpoint Register Pairs */
2649         aarch64->brp_num = (uint32_t)((debug >> 12) & 0x0F) + 1;
2650         aarch64->brp_num_context = (uint32_t)((debug >> 28) & 0x0F) + 1;
2651         aarch64->brp_num_available = aarch64->brp_num;
2652         aarch64->brp_list = calloc(aarch64->brp_num, sizeof(struct aarch64_brp));
2653         for (i = 0; i < aarch64->brp_num; i++) {
2654                 aarch64->brp_list[i].used = 0;
2655                 if (i < (aarch64->brp_num-aarch64->brp_num_context))
2656                         aarch64->brp_list[i].type = BRP_NORMAL;
2657                 else
2658                         aarch64->brp_list[i].type = BRP_CONTEXT;
2659                 aarch64->brp_list[i].value = 0;
2660                 aarch64->brp_list[i].control = 0;
2661                 aarch64->brp_list[i].brpn = i;
2662         }
2663
2664         /* Setup Watchpoint Register Pairs */
2665         aarch64->wp_num = (uint32_t)((debug >> 20) & 0x0F) + 1;
2666         aarch64->wp_num_available = aarch64->wp_num;
2667         aarch64->wp_list = calloc(aarch64->wp_num, sizeof(struct aarch64_brp));
2668         for (i = 0; i < aarch64->wp_num; i++) {
2669                 aarch64->wp_list[i].used = 0;
2670                 aarch64->wp_list[i].type = BRP_NORMAL;
2671                 aarch64->wp_list[i].value = 0;
2672                 aarch64->wp_list[i].control = 0;
2673                 aarch64->wp_list[i].brpn = i;
2674         }
2675
2676         LOG_DEBUG("Configured %i hw breakpoints, %i watchpoints",
2677                 aarch64->brp_num, aarch64->wp_num);
2678
2679         target->state = TARGET_UNKNOWN;
2680         target->debug_reason = DBG_REASON_NOTHALTED;
2681         aarch64->isrmasking_mode = AARCH64_ISRMASK_ON;
2682         target_set_examined(target);
2683         return ERROR_OK;
2684 }
2685
2686 static int aarch64_examine(struct target *target)
2687 {
2688         int retval = ERROR_OK;
2689
2690         /* don't re-probe hardware after each reset */
2691         if (!target_was_examined(target))
2692                 retval = aarch64_examine_first(target);
2693
2694         /* Configure core debug access */
2695         if (retval == ERROR_OK)
2696                 retval = aarch64_init_debug_access(target);
2697
2698         return retval;
2699 }
2700
2701 /*
2702  *      Cortex-A8 target creation and initialization
2703  */
2704
2705 static int aarch64_init_target(struct command_context *cmd_ctx,
2706         struct target *target)
2707 {
2708         /* examine_first() does a bunch of this */
2709         arm_semihosting_init(target);
2710         return ERROR_OK;
2711 }
2712
2713 static int aarch64_init_arch_info(struct target *target,
2714         struct aarch64_common *aarch64, struct adiv5_dap *dap)
2715 {
2716         struct armv8_common *armv8 = &aarch64->armv8_common;
2717
2718         /* Setup struct aarch64_common */
2719         aarch64->common_magic = AARCH64_COMMON_MAGIC;
2720         armv8->arm.dap = dap;
2721
2722         /* register arch-specific functions */
2723         armv8->examine_debug_reason = NULL;
2724         armv8->post_debug_entry = aarch64_post_debug_entry;
2725         armv8->pre_restore_context = NULL;
2726         armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
2727
2728         armv8_init_arch_info(target, armv8);
2729         target_register_timer_callback(aarch64_handle_target_request, 1,
2730                 TARGET_TIMER_TYPE_PERIODIC, target);
2731
2732         return ERROR_OK;
2733 }
2734
2735 static int aarch64_target_create(struct target *target, Jim_Interp *interp)
2736 {
2737         struct aarch64_private_config *pc = target->private_config;
2738         struct aarch64_common *aarch64;
2739
2740         if (adiv5_verify_config(&pc->adiv5_config) != ERROR_OK)
2741                 return ERROR_FAIL;
2742
2743         aarch64 = calloc(1, sizeof(struct aarch64_common));
2744         if (!aarch64) {
2745                 LOG_ERROR("Out of memory");
2746                 return ERROR_FAIL;
2747         }
2748
2749         return aarch64_init_arch_info(target, aarch64, pc->adiv5_config.dap);
2750 }
2751
2752 static void aarch64_deinit_target(struct target *target)
2753 {
2754         struct aarch64_common *aarch64 = target_to_aarch64(target);
2755         struct armv8_common *armv8 = &aarch64->armv8_common;
2756         struct arm_dpm *dpm = &armv8->dpm;
2757
2758         armv8_free_reg_cache(target);
2759         free(aarch64->brp_list);
2760         free(dpm->dbp);
2761         free(dpm->dwp);
2762         free(target->private_config);
2763         free(aarch64);
2764 }
2765
2766 static int aarch64_mmu(struct target *target, int *enabled)
2767 {
2768         if (target->state != TARGET_HALTED) {
2769                 LOG_ERROR("%s: target %s not halted", __func__, target_name(target));
2770                 return ERROR_TARGET_INVALID;
2771         }
2772
2773         *enabled = target_to_aarch64(target)->armv8_common.armv8_mmu.mmu_enabled;
2774         return ERROR_OK;
2775 }
2776
2777 static int aarch64_virt2phys(struct target *target, target_addr_t virt,
2778                              target_addr_t *phys)
2779 {
2780         return armv8_mmu_translate_va_pa(target, virt, phys, 1);
2781 }
2782
2783 /*
2784  * private target configuration items
2785  */
2786 enum aarch64_cfg_param {
2787         CFG_CTI,
2788 };
2789
2790 static const struct jim_nvp nvp_config_opts[] = {
2791         { .name = "-cti", .value = CFG_CTI },
2792         { .name = NULL, .value = -1 }
2793 };
2794
2795 static int aarch64_jim_configure(struct target *target, struct jim_getopt_info *goi)
2796 {
2797         struct aarch64_private_config *pc;
2798         struct jim_nvp *n;
2799         int e;
2800
2801         pc = (struct aarch64_private_config *)target->private_config;
2802         if (!pc) {
2803                         pc = calloc(1, sizeof(struct aarch64_private_config));
2804                         pc->adiv5_config.ap_num = DP_APSEL_INVALID;
2805                         target->private_config = pc;
2806         }
2807
2808         /*
2809          * Call adiv5_jim_configure() to parse the common DAP options
2810          * It will return JIM_CONTINUE if it didn't find any known
2811          * options, JIM_OK if it correctly parsed the topmost option
2812          * and JIM_ERR if an error occurred during parameter evaluation.
2813          * For JIM_CONTINUE, we check our own params.
2814          *
2815          * adiv5_jim_configure() assumes 'private_config' to point to
2816          * 'struct adiv5_private_config'. Override 'private_config'!
2817          */
2818         target->private_config = &pc->adiv5_config;
2819         e = adiv5_jim_configure(target, goi);
2820         target->private_config = pc;
2821         if (e != JIM_CONTINUE)
2822                 return e;
2823
2824         /* parse config or cget options ... */
2825         if (goi->argc > 0) {
2826                 Jim_SetEmptyResult(goi->interp);
2827
2828                 /* check first if topmost item is for us */
2829                 e = jim_nvp_name2value_obj(goi->interp, nvp_config_opts,
2830                                 goi->argv[0], &n);
2831                 if (e != JIM_OK)
2832                         return JIM_CONTINUE;
2833
2834                 e = jim_getopt_obj(goi, NULL);
2835                 if (e != JIM_OK)
2836                         return e;
2837
2838                 switch (n->value) {
2839                 case CFG_CTI: {
2840                         if (goi->isconfigure) {
2841                                 Jim_Obj *o_cti;
2842                                 struct arm_cti *cti;
2843                                 e = jim_getopt_obj(goi, &o_cti);
2844                                 if (e != JIM_OK)
2845                                         return e;
2846                                 cti = cti_instance_by_jim_obj(goi->interp, o_cti);
2847                                 if (!cti) {
2848                                         Jim_SetResultString(goi->interp, "CTI name invalid!", -1);
2849                                         return JIM_ERR;
2850                                 }
2851                                 pc->cti = cti;
2852                         } else {
2853                                 if (goi->argc != 0) {
2854                                         Jim_WrongNumArgs(goi->interp,
2855                                                         goi->argc, goi->argv,
2856                                                         "NO PARAMS");
2857                                         return JIM_ERR;
2858                                 }
2859
2860                                 if (!pc || !pc->cti) {
2861                                         Jim_SetResultString(goi->interp, "CTI not configured", -1);
2862                                         return JIM_ERR;
2863                                 }
2864                                 Jim_SetResultString(goi->interp, arm_cti_name(pc->cti), -1);
2865                         }
2866                         break;
2867                 }
2868
2869                 default:
2870                         return JIM_CONTINUE;
2871                 }
2872         }
2873
2874         return JIM_OK;
2875 }
2876
2877 COMMAND_HANDLER(aarch64_handle_cache_info_command)
2878 {
2879         struct target *target = get_current_target(CMD_CTX);
2880         struct armv8_common *armv8 = target_to_armv8(target);
2881
2882         return armv8_handle_cache_info_command(CMD,
2883                         &armv8->armv8_mmu.armv8_cache);
2884 }
2885
2886 COMMAND_HANDLER(aarch64_handle_dbginit_command)
2887 {
2888         struct target *target = get_current_target(CMD_CTX);
2889         if (!target_was_examined(target)) {
2890                 LOG_ERROR("target not examined yet");
2891                 return ERROR_FAIL;
2892         }
2893
2894         return aarch64_init_debug_access(target);
2895 }
2896
2897 COMMAND_HANDLER(aarch64_handle_disassemble_command)
2898 {
2899         struct target *target = get_current_target(CMD_CTX);
2900
2901         if (!target) {
2902                 LOG_ERROR("No target selected");
2903                 return ERROR_FAIL;
2904         }
2905
2906         struct aarch64_common *aarch64 = target_to_aarch64(target);
2907
2908         if (aarch64->common_magic != AARCH64_COMMON_MAGIC) {
2909                 command_print(CMD, "current target isn't an AArch64");
2910                 return ERROR_FAIL;
2911         }
2912
2913         int count = 1;
2914         target_addr_t address;
2915
2916         switch (CMD_ARGC) {
2917                 case 2:
2918                         COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], count);
2919                 /* FALL THROUGH */
2920                 case 1:
2921                         COMMAND_PARSE_ADDRESS(CMD_ARGV[0], address);
2922                         break;
2923                 default:
2924                         return ERROR_COMMAND_SYNTAX_ERROR;
2925         }
2926
2927         return a64_disassemble(CMD, target, address, count);
2928 }
2929
2930 COMMAND_HANDLER(aarch64_mask_interrupts_command)
2931 {
2932         struct target *target = get_current_target(CMD_CTX);
2933         struct aarch64_common *aarch64 = target_to_aarch64(target);
2934
2935         static const struct jim_nvp nvp_maskisr_modes[] = {
2936                 { .name = "off", .value = AARCH64_ISRMASK_OFF },
2937                 { .name = "on", .value = AARCH64_ISRMASK_ON },
2938                 { .name = NULL, .value = -1 },
2939         };
2940         const struct jim_nvp *n;
2941
2942         if (CMD_ARGC > 0) {
2943                 n = jim_nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
2944                 if (!n->name) {
2945                         LOG_ERROR("Unknown parameter: %s - should be off or on", CMD_ARGV[0]);
2946                         return ERROR_COMMAND_SYNTAX_ERROR;
2947                 }
2948
2949                 aarch64->isrmasking_mode = n->value;
2950         }
2951
2952         n = jim_nvp_value2name_simple(nvp_maskisr_modes, aarch64->isrmasking_mode);
2953         command_print(CMD, "aarch64 interrupt mask %s", n->name);
2954
2955         return ERROR_OK;
2956 }
2957
2958 static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
2959 {
2960         struct command *c = jim_to_command(interp);
2961         struct command_context *context;
2962         struct target *target;
2963         struct arm *arm;
2964         int retval;
2965         bool is_mcr = false;
2966         int arg_cnt = 0;
2967
2968         if (!strcmp(c->name, "mcr")) {
2969                 is_mcr = true;
2970                 arg_cnt = 7;
2971         } else {
2972                 arg_cnt = 6;
2973         }
2974
2975         context = current_command_context(interp);
2976         assert(context);
2977
2978         target = get_current_target(context);
2979         if (!target) {
2980                 LOG_ERROR("%s: no current target", __func__);
2981                 return JIM_ERR;
2982         }
2983         if (!target_was_examined(target)) {
2984                 LOG_ERROR("%s: not yet examined", target_name(target));
2985                 return JIM_ERR;
2986         }
2987
2988         arm = target_to_arm(target);
2989         if (!is_arm(arm)) {
2990                 LOG_ERROR("%s: not an ARM", target_name(target));
2991                 return JIM_ERR;
2992         }
2993
2994         if (target->state != TARGET_HALTED)
2995                 return ERROR_TARGET_NOT_HALTED;
2996
2997         if (arm->core_state == ARM_STATE_AARCH64) {
2998                 LOG_ERROR("%s: not 32-bit arm target", target_name(target));
2999                 return JIM_ERR;
3000         }
3001
3002         if (argc != arg_cnt) {
3003                 LOG_ERROR("%s: wrong number of arguments", __func__);
3004                 return JIM_ERR;
3005         }
3006
3007         int cpnum;
3008         uint32_t op1;
3009         uint32_t op2;
3010         uint32_t crn;
3011         uint32_t crm;
3012         uint32_t value;
3013         long l;
3014
3015         /* NOTE:  parameter sequence matches ARM instruction set usage:
3016          *      MCR     pNUM, op1, rX, CRn, CRm, op2    ; write CP from rX
3017          *      MRC     pNUM, op1, rX, CRn, CRm, op2    ; read CP into rX
3018          * The "rX" is necessarily omitted; it uses Tcl mechanisms.
3019          */
3020         retval = Jim_GetLong(interp, argv[1], &l);
3021         if (retval != JIM_OK)
3022                 return retval;
3023         if (l & ~0xf) {
3024                 LOG_ERROR("%s: %s %d out of range", __func__,
3025                         "coprocessor", (int) l);
3026                 return JIM_ERR;
3027         }
3028         cpnum = l;
3029
3030         retval = Jim_GetLong(interp, argv[2], &l);
3031         if (retval != JIM_OK)
3032                 return retval;
3033         if (l & ~0x7) {
3034                 LOG_ERROR("%s: %s %d out of range", __func__,
3035                         "op1", (int) l);
3036                 return JIM_ERR;
3037         }
3038         op1 = l;
3039
3040         retval = Jim_GetLong(interp, argv[3], &l);
3041         if (retval != JIM_OK)
3042                 return retval;
3043         if (l & ~0xf) {
3044                 LOG_ERROR("%s: %s %d out of range", __func__,
3045                         "CRn", (int) l);
3046                 return JIM_ERR;
3047         }
3048         crn = l;
3049
3050         retval = Jim_GetLong(interp, argv[4], &l);
3051         if (retval != JIM_OK)
3052                 return retval;
3053         if (l & ~0xf) {
3054                 LOG_ERROR("%s: %s %d out of range", __func__,
3055                         "CRm", (int) l);
3056                 return JIM_ERR;
3057         }
3058         crm = l;
3059
3060         retval = Jim_GetLong(interp, argv[5], &l);
3061         if (retval != JIM_OK)
3062                 return retval;
3063         if (l & ~0x7) {
3064                 LOG_ERROR("%s: %s %d out of range", __func__,
3065                         "op2", (int) l);
3066                 return JIM_ERR;
3067         }
3068         op2 = l;
3069
3070         value = 0;
3071
3072         if (is_mcr == true) {
3073                 retval = Jim_GetLong(interp, argv[6], &l);
3074                 if (retval != JIM_OK)
3075                         return retval;
3076                 value = l;
3077
3078                 /* NOTE: parameters reordered! */
3079                 /* ARMV4_5_MCR(cpnum, op1, 0, crn, crm, op2) */
3080                 retval = arm->mcr(target, cpnum, op1, op2, crn, crm, value);
3081                 if (retval != ERROR_OK)
3082                         return JIM_ERR;
3083         } else {
3084                 /* NOTE: parameters reordered! */
3085                 /* ARMV4_5_MRC(cpnum, op1, 0, crn, crm, op2) */
3086                 retval = arm->mrc(target, cpnum, op1, op2, crn, crm, &value);
3087                 if (retval != ERROR_OK)
3088                         return JIM_ERR;
3089
3090                 Jim_SetResult(interp, Jim_NewIntObj(interp, value));
3091         }
3092
3093         return JIM_OK;
3094 }
3095
3096 static const struct command_registration aarch64_exec_command_handlers[] = {
3097         {
3098                 .name = "cache_info",
3099                 .handler = aarch64_handle_cache_info_command,
3100                 .mode = COMMAND_EXEC,
3101                 .help = "display information about target caches",
3102                 .usage = "",
3103         },
3104         {
3105                 .name = "dbginit",
3106                 .handler = aarch64_handle_dbginit_command,
3107                 .mode = COMMAND_EXEC,
3108                 .help = "Initialize core debug",
3109                 .usage = "",
3110         },
3111         {
3112                 .name = "disassemble",
3113                 .handler = aarch64_handle_disassemble_command,
3114                 .mode = COMMAND_EXEC,
3115                 .help = "Disassemble instructions",
3116                 .usage = "address [count]",
3117         },
3118         {
3119                 .name = "maskisr",
3120                 .handler = aarch64_mask_interrupts_command,
3121                 .mode = COMMAND_ANY,
3122                 .help = "mask aarch64 interrupts during single-step",
3123                 .usage = "['on'|'off']",
3124         },
3125         {
3126                 .name = "mcr",
3127                 .mode = COMMAND_EXEC,
3128                 .jim_handler = jim_mcrmrc,
3129                 .help = "write coprocessor register",
3130                 .usage = "cpnum op1 CRn CRm op2 value",
3131         },
3132         {
3133                 .name = "mrc",
3134                 .mode = COMMAND_EXEC,
3135                 .jim_handler = jim_mcrmrc,
3136                 .help = "read coprocessor register",
3137                 .usage = "cpnum op1 CRn CRm op2",
3138         },
3139         {
3140                 .chain = smp_command_handlers,
3141         },
3142
3143
3144         COMMAND_REGISTRATION_DONE
3145 };
3146
3147 extern const struct command_registration semihosting_common_handlers[];
3148
3149 static const struct command_registration aarch64_command_handlers[] = {
3150         {
3151                 .name = "arm",
3152                 .mode = COMMAND_ANY,
3153                 .help = "ARM Command Group",
3154                 .usage = "",
3155                 .chain = semihosting_common_handlers
3156         },
3157         {
3158                 .chain = armv8_command_handlers,
3159         },
3160         {
3161                 .name = "aarch64",
3162                 .mode = COMMAND_ANY,
3163                 .help = "Aarch64 command group",
3164                 .usage = "",
3165                 .chain = aarch64_exec_command_handlers,
3166         },
3167         COMMAND_REGISTRATION_DONE
3168 };
3169
3170 struct target_type aarch64_target = {
3171         .name = "aarch64",
3172
3173         .poll = aarch64_poll,
3174         .arch_state = armv8_arch_state,
3175
3176         .halt = aarch64_halt,
3177         .resume = aarch64_resume,
3178         .step = aarch64_step,
3179
3180         .assert_reset = aarch64_assert_reset,
3181         .deassert_reset = aarch64_deassert_reset,
3182
3183         /* REVISIT allow exporting VFP3 registers ... */
3184         .get_gdb_arch = armv8_get_gdb_arch,
3185         .get_gdb_reg_list = armv8_get_gdb_reg_list,
3186
3187         .read_memory = aarch64_read_memory,
3188         .write_memory = aarch64_write_memory,
3189
3190         .add_breakpoint = aarch64_add_breakpoint,
3191         .add_context_breakpoint = aarch64_add_context_breakpoint,
3192         .add_hybrid_breakpoint = aarch64_add_hybrid_breakpoint,
3193         .remove_breakpoint = aarch64_remove_breakpoint,
3194         .add_watchpoint = aarch64_add_watchpoint,
3195         .remove_watchpoint = aarch64_remove_watchpoint,
3196         .hit_watchpoint = aarch64_hit_watchpoint,
3197
3198         .commands = aarch64_command_handlers,
3199         .target_create = aarch64_target_create,
3200         .target_jim_configure = aarch64_jim_configure,
3201         .init_target = aarch64_init_target,
3202         .deinit_target = aarch64_deinit_target,
3203         .examine = aarch64_examine,
3204
3205         .read_phys_memory = aarch64_read_phys_memory,
3206         .write_phys_memory = aarch64_write_phys_memory,
3207         .mmu = aarch64_mmu,
3208         .virt2phys = aarch64_virt2phys,
3209 };