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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 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include <helper/replacements.h>
  24
  25 #include "armv8.h"
  26 #include "arm_disassembler.h"
  27
  28 #include "register.h"
  29 #include <helper/binarybuffer.h>
  30 #include <helper/command.h>
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35
  36 #include "armv8_opcodes.h"
  37 #include "target.h"
  38 #include "target_type.h"
  39
  40 #define __unused __attribute__((unused))
  41
  42 static const char * const armv8_state_strings[] = {
  43         "AArch32", "Thumb", "Jazelle", "ThumbEE", "AArch64",
  44 };
  45
  46 static const struct {
  47         const char *name;
  48         unsigned psr;
  49         /* For user and system modes, these list indices for all registers.
  50          * otherwise they're just indices for the shadow registers and SPSR.
  51          */
  52         unsigned short n_indices;
  53         const uint8_t *indices;
  54 } armv8_mode_data[] = {
  55         /* These special modes are currently only supported
  56          * by ARMv6M and ARMv7M profiles */
  57         {
  58                 .name = "USR",
  59                 .psr = ARM_MODE_USR,
  60         },
  61         {
  62                 .name = "FIQ",
  63                 .psr = ARM_MODE_FIQ,
  64         },
  65         {
  66                 .name = "IRQ",
  67                 .psr = ARM_MODE_IRQ,
  68         },
  69         {
  70                 .name = "SVC",
  71                 .psr = ARM_MODE_SVC,
  72         },
  73         {
  74                 .name = "MON",
  75                 .psr = ARM_MODE_MON,
  76         },
  77         {
  78                 .name = "ABT",
  79                 .psr = ARM_MODE_ABT,
  80         },
  81         {
  82                 .name = "EL0T",
  83                 .psr = ARMV8_64_EL0T,
  84         },
  85         {
  86                 .name = "EL1T",
  87                 .psr = ARMV8_64_EL1T,
  88         },
  89         {
  90                 .name = "EL1H",
  91                 .psr = ARMV8_64_EL1H,
  92         },
  93         {
  94                 .name = "EL2T",
  95                 .psr = ARMV8_64_EL2T,
  96         },
  97         {
  98                 .name = "EL2H",
  99                 .psr = ARMV8_64_EL2H,
 100         },
 101         {
 102                 .name = "EL3T",
 103                 .psr = ARMV8_64_EL3T,
 104         },
 105         {
 106                 .name = "EL3H",
 107                 .psr = ARMV8_64_EL3H,
 108         },
 109 };
 110
 111 /** Map PSR mode bits to the name of an ARM processor operating mode. */
 112 const char *armv8_mode_name(unsigned psr_mode)
 113 {
 114         for (unsigned i = 0; i < ARRAY_SIZE(armv8_mode_data); i++) {
 115                 if (armv8_mode_data[i].psr == psr_mode)
 116                         return armv8_mode_data[i].name;
 117         }
 118         LOG_ERROR("unrecognized psr mode: %#02x", psr_mode);
 119         return "UNRECOGNIZED";
 120 }
 121
 122 int armv8_mode_to_number(enum arm_mode mode)
 123 {
 124         switch (mode) {
 125                 case ARM_MODE_ANY:
 126                 /* map MODE_ANY to user mode */
 127                 case ARM_MODE_USR:
 128                         return 0;
 129                 case ARM_MODE_FIQ:
 130                         return 1;
 131                 case ARM_MODE_IRQ:
 132                         return 2;
 133                 case ARM_MODE_SVC:
 134                         return 3;
 135                 case ARM_MODE_ABT:
 136                         return 4;
 137                 case ARM_MODE_UND:
 138                         return 5;
 139                 case ARM_MODE_SYS:
 140                         return 6;
 141                 case ARM_MODE_MON:
 142                         return 7;
 143                 case ARMV8_64_EL0T:
 144                         return 8;
 145                 case ARMV8_64_EL1T:
 146                         return 9;
 147                 case ARMV8_64_EL1H:
 148                         return 10;
 149                 case ARMV8_64_EL2T:
 150                         return 11;
 151                 case ARMV8_64_EL2H:
 152                         return 12;
 153                 case ARMV8_64_EL3T:
 154                         return 13;
 155                 case ARMV8_64_EL3H:
 156                         return 14;
 157
 158                 default:
 159                         LOG_ERROR("invalid mode value encountered %d", mode);
 160                         return -1;
 161         }
 162 }
 163
 164
 165 static int armv8_read_core_reg(struct target *target, struct reg *r,
 166         int num, enum arm_mode mode)
 167 {
 168         uint64_t reg_value;
 169         int retval;
 170         struct arm_reg *armv8_core_reg;
 171         struct armv8_common *armv8 = target_to_armv8(target);
 172
 173         assert(num < (int)armv8->arm.core_cache->num_regs);
 174
 175         armv8_core_reg = armv8->arm.core_cache->reg_list[num].arch_info;
 176         retval = armv8->load_core_reg_u64(target,
 177                         armv8_core_reg->num, &reg_value);
 178
 179         buf_set_u64(armv8->arm.core_cache->reg_list[num].value, 0, 64, reg_value);
 180         armv8->arm.core_cache->reg_list[num].valid = 1;
 181         armv8->arm.core_cache->reg_list[num].dirty = 0;
 182
 183         return retval;
 184 }
 185
 186 #if 0
 187 static int armv8_write_core_reg(struct target *target, struct reg *r,
 188         int num, enum arm_mode mode, target_addr_t value)
 189 {
 190         int retval;
 191         struct arm_reg *armv8_core_reg;
 192         struct armv8_common *armv8 = target_to_armv8(target);
 193
 194         assert(num < (int)armv8->arm.core_cache->num_regs);
 195
 196         armv8_core_reg = armv8->arm.core_cache->reg_list[num].arch_info;
 197         retval = armv8->store_core_reg_u64(target,
 198                                             armv8_core_reg->num,
 199                                             value);
 200         if (retval != ERROR_OK) {
 201                 LOG_ERROR("JTAG failure");
 202                 armv8->arm.core_cache->reg_list[num].dirty = armv8->arm.core_cache->reg_list[num].valid;
 203                 return ERROR_JTAG_DEVICE_ERROR;
 204         }
 205
 206         LOG_DEBUG("write core reg %i value 0x%" PRIx64 "", num, value);
 207         armv8->arm.core_cache->reg_list[num].valid = 1;
 208         armv8->arm.core_cache->reg_list[num].dirty = 0;
 209
 210         return ERROR_OK;
 211 }
 212 #endif
 213
 214 /*  retrieve core id cluster id  */
 215 int armv8_read_mpidr(struct armv8_common *armv8)
 216 {
 217         int retval = ERROR_FAIL;
 218         struct arm_dpm *dpm = armv8->arm.dpm;
 219         uint32_t mpidr;
 220
 221         retval = dpm->prepare(dpm);
 222         if (retval != ERROR_OK)
 223                 goto done;
 224
 225         retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_MPIDR), &mpidr);
 226         if (retval != ERROR_OK)
 227                 goto done;
 228         if (mpidr & 1<<31) {
 229                 armv8->multi_processor_system = (mpidr >> 30) & 1;
 230                 armv8->cluster_id = (mpidr >> 8) & 0xf;
 231                 armv8->cpu_id = mpidr & 0x3;
 232                 LOG_INFO("%s cluster %x core %x %s", target_name(armv8->arm.target),
 233                         armv8->cluster_id,
 234                         armv8->cpu_id,
 235                         armv8->multi_processor_system == 0 ? "multi core" : "mono core");
 236
 237         } else
 238                 LOG_ERROR("mpdir not in multiprocessor format");
 239
 240 done:
 241         dpm->finish(dpm);
 242         return retval;
 243 }
 244
 245 /**
 246  * Configures host-side ARM records to reflect the specified CPSR.
 247  * Later, code can use arm_reg_current() to map register numbers
 248  * according to how they are exposed by this mode.
 249  */
 250 void armv8_set_cpsr(struct arm *arm, uint32_t cpsr)
 251 {
 252         uint32_t mode = cpsr & 0x1F;
 253
 254         /* NOTE:  this may be called very early, before the register
 255          * cache is set up.  We can't defend against many errors, in
 256          * particular against CPSRs that aren't valid *here* ...
 257          */
 258         if (arm->cpsr) {
 259                 buf_set_u32(arm->cpsr->value, 0, 32, cpsr);
 260                 arm->cpsr->valid = 1;
 261                 arm->cpsr->dirty = 0;
 262         }
 263
 264         /* Older ARMs won't have the J bit */
 265         enum arm_state state = 0xFF;
 266
 267         if (((cpsr & 0x10) >> 4) == 0) {
 268                 state = ARM_STATE_AARCH64;
 269         } else {
 270                 if (cpsr & (1 << 5)) {  /* T */
 271                         if (cpsr & (1 << 24)) { /* J */
 272                                 LOG_WARNING("ThumbEE -- incomplete support");
 273                                 state = ARM_STATE_THUMB_EE;
 274                         } else
 275                                 state = ARM_STATE_THUMB;
 276                 } else {
 277                         if (cpsr & (1 << 24)) { /* J */
 278                                 LOG_ERROR("Jazelle state handling is BROKEN!");
 279                                 state = ARM_STATE_JAZELLE;
 280                         } else
 281                                 state = ARM_STATE_ARM;
 282                 }
 283         }
 284         arm->core_state = state;
 285         if (arm->core_state == ARM_STATE_AARCH64) {
 286                 switch (mode) {
 287                         case SYSTEM_AAR64_MODE_EL0t:
 288                                 arm->core_mode = ARMV8_64_EL0T;
 289                         break;
 290                         case SYSTEM_AAR64_MODE_EL1t:
 291                                 arm->core_mode = ARMV8_64_EL0T;
 292                         break;
 293                         case SYSTEM_AAR64_MODE_EL1h:
 294                                 arm->core_mode = ARMV8_64_EL1H;
 295                         break;
 296                         case SYSTEM_AAR64_MODE_EL2t:
 297                                 arm->core_mode = ARMV8_64_EL2T;
 298                         break;
 299                         case SYSTEM_AAR64_MODE_EL2h:
 300                                 arm->core_mode = ARMV8_64_EL2H;
 301                         break;
 302                         case SYSTEM_AAR64_MODE_EL3t:
 303                                 arm->core_mode = ARMV8_64_EL3T;
 304                         break;
 305                         case SYSTEM_AAR64_MODE_EL3h:
 306                                 arm->core_mode = ARMV8_64_EL3H;
 307                         break;
 308                         default:
 309                                 LOG_DEBUG("unknow mode 0x%x", (unsigned) (mode));
 310                         break;
 311                 }
 312         } else {
 313                 arm->core_mode = mode;
 314         }
 315
 316         LOG_DEBUG("set CPSR %#8.8x: %s mode, %s state", (unsigned) cpsr,
 317                 armv8_mode_name(arm->core_mode),
 318                 armv8_state_strings[arm->core_state]);
 319 }
 320
 321 static void armv8_show_fault_registers32(struct armv8_common *armv8)
 322 {
 323         uint32_t dfsr, ifsr, dfar, ifar;
 324         struct arm_dpm *dpm = armv8->arm.dpm;
 325         int retval;
 326
 327         retval = dpm->prepare(dpm);
 328         if (retval != ERROR_OK)
 329                 return;
 330
 331         /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
 332
 333         /* c5/c0 - {data, instruction} fault status registers */
 334         retval = dpm->instr_read_data_r0(dpm,
 335                         T32_FMTITR(ARMV4_5_MRC(15, 0, 0, 5, 0, 0)),
 336                         &dfsr);
 337         if (retval != ERROR_OK)
 338                 goto done;
 339
 340         retval = dpm->instr_read_data_r0(dpm,
 341                         T32_FMTITR(ARMV4_5_MRC(15, 0, 0, 5, 0, 1)),
 342                         &ifsr);
 343         if (retval != ERROR_OK)
 344                 goto done;
 345
 346         /* c6/c0 - {data, instruction} fault address registers */
 347         retval = dpm->instr_read_data_r0(dpm,
 348                         T32_FMTITR(ARMV4_5_MRC(15, 0, 0, 6, 0, 0)),
 349                         &dfar);
 350         if (retval != ERROR_OK)
 351                 goto done;
 352
 353         retval = dpm->instr_read_data_r0(dpm,
 354                         T32_FMTITR(ARMV4_5_MRC(15, 0, 0, 6, 0, 2)),
 355                         &ifar);
 356         if (retval != ERROR_OK)
 357                 goto done;
 358
 359         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
 360                 ", DFAR: %8.8" PRIx32, dfsr, dfar);
 361         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
 362                 ", IFAR: %8.8" PRIx32, ifsr, ifar);
 363
 364 done:
 365         /* (void) */ dpm->finish(dpm);
 366 }
 367
 368 static void armv8_show_fault_registers(struct target *target)
 369 {
 370         struct armv8_common *armv8 = target_to_armv8(target);
 371
 372         if (armv8->arm.core_state != ARM_STATE_AARCH64)
 373                 armv8_show_fault_registers32(armv8);
 374 }
 375
 376 static uint8_t armv8_pa_size(uint32_t ps)
 377 {
 378         uint8_t ret = 0;
 379         switch (ps) {
 380                 case 0:
 381                         ret = 32;
 382                         break;
 383                 case 1:
 384                         ret = 36;
 385                         break;
 386                 case 2:
 387                         ret = 40;
 388                         break;
 389                 case 3:
 390                         ret = 42;
 391                         break;
 392                 case 4:
 393                         ret = 44;
 394                         break;
 395                 case 5:
 396                         ret = 48;
 397                         break;
 398                 default:
 399                         LOG_INFO("Unknow physicall address size");
 400                         break;
 401         }
 402         return ret;
 403 }
 404
 405 static __unused int armv8_read_ttbcr32(struct target *target)
 406 {
 407         struct armv8_common *armv8 = target_to_armv8(target);
 408         struct arm_dpm *dpm = armv8->arm.dpm;
 409         uint32_t ttbcr, ttbcr_n;
 410         int retval = dpm->prepare(dpm);
 411         if (retval != ERROR_OK)
 412                 goto done;
 413         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
 414         retval = dpm->instr_read_data_r0(dpm,
 415                         T32_FMTITR(ARMV4_5_MRC(15, 0, 0, 2, 0, 2)),
 416                         &ttbcr);
 417         if (retval != ERROR_OK)
 418                 goto done;
 419
 420         LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
 421
 422         ttbcr_n = ttbcr & 0x7;
 423         armv8->armv8_mmu.ttbcr = ttbcr;
 424
 425         /*
 426          * ARM Architecture Reference Manual (ARMv7-A and ARMv7-Redition),
 427          * document # ARM DDI 0406C
 428          */
 429         armv8->armv8_mmu.ttbr_range[0]  = 0xffffffff >> ttbcr_n;
 430         armv8->armv8_mmu.ttbr_range[1] = 0xffffffff;
 431         armv8->armv8_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
 432         armv8->armv8_mmu.ttbr_mask[1] = 0xffffffff << 14;
 433
 434         LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
 435                   (ttbcr_n != 0) ? "used" : "not used",
 436                   armv8->armv8_mmu.ttbr_mask[0],
 437                   armv8->armv8_mmu.ttbr_mask[1]);
 438
 439 done:
 440         dpm->finish(dpm);
 441         return retval;
 442 }
 443
 444 static int armv8_read_ttbcr(struct target *target)
 445 {
 446         struct armv8_common *armv8 = target_to_armv8(target);
 447         struct arm_dpm *dpm = armv8->arm.dpm;
 448         struct arm *arm = &armv8->arm;
 449         uint32_t ttbcr;
 450         uint64_t ttbcr_64;
 451
 452         int retval = dpm->prepare(dpm);
 453         if (retval != ERROR_OK)
 454                 goto done;
 455
 456         /* claaer ttrr1_used and ttbr0_mask */
 457         memset(&armv8->armv8_mmu.ttbr1_used, 0, sizeof(armv8->armv8_mmu.ttbr1_used));
 458         memset(&armv8->armv8_mmu.ttbr0_mask, 0, sizeof(armv8->armv8_mmu.ttbr0_mask));
 459
 460         switch (arm->core_mode) {
 461                 case ARMV8_64_EL3H:
 462                 case ARMV8_64_EL3T:
 463                         retval = dpm->instr_read_data_r0(dpm,
 464                                         ARMV8_MRS(SYSTEM_TCR_EL3, 0),
 465                                         &ttbcr);
 466                         retval += dpm->instr_read_data_r0_64(dpm,
 467                                         ARMV8_MRS(SYSTEM_TTBR0_EL3, 0),
 468                                         &armv8->ttbr_base);
 469                         if (retval != ERROR_OK)
 470                                 goto done;
 471                         armv8->va_size = 64 - (ttbcr & 0x3F);
 472                         armv8->pa_size = armv8_pa_size((ttbcr >> 16) & 7);
 473                         armv8->page_size = (ttbcr >> 14) & 3;
 474                         break;
 475                 case ARMV8_64_EL2T:
 476                 case ARMV8_64_EL2H:
 477                         retval = dpm->instr_read_data_r0(dpm,
 478                                         ARMV8_MRS(SYSTEM_TCR_EL2, 0),
 479                                         &ttbcr);
 480                         retval += dpm->instr_read_data_r0_64(dpm,
 481                                         ARMV8_MRS(SYSTEM_TTBR0_EL2, 0),
 482                                         &armv8->ttbr_base);
 483                         if (retval != ERROR_OK)
 484                                 goto done;
 485                         armv8->va_size = 64 - (ttbcr & 0x3F);
 486                         armv8->pa_size = armv8_pa_size((ttbcr >> 16) & 7);
 487                         armv8->page_size = (ttbcr >> 14) & 3;
 488                         break;
 489                 case ARMV8_64_EL0T:
 490                 case ARMV8_64_EL1T:
 491                 case ARMV8_64_EL1H:
 492                         retval = dpm->instr_read_data_r0_64(dpm,
 493                                         ARMV8_MRS(SYSTEM_TCR_EL1, 0),
 494                                         &ttbcr_64);
 495                         armv8->va_size = 64 - (ttbcr_64 & 0x3F);
 496                         armv8->pa_size = armv8_pa_size((ttbcr_64 >> 32) & 7);
 497                         armv8->page_size = (ttbcr_64 >> 14) & 3;
 498                         armv8->armv8_mmu.ttbr1_used = (((ttbcr_64 >> 16) & 0x3F) != 0) ? 1 : 0;
 499                         armv8->armv8_mmu.ttbr0_mask  = 0x0000FFFFFFFFFFFF;
 500                         retval += dpm->instr_read_data_r0_64(dpm,
 501                                         ARMV8_MRS(SYSTEM_TTBR0_EL1 | (armv8->armv8_mmu.ttbr1_used), 0),
 502                                         &armv8->ttbr_base);
 503                         if (retval != ERROR_OK)
 504                                 goto done;
 505                         break;
 506                 default:
 507                         LOG_ERROR("unknow core state");
 508                         retval = ERROR_FAIL;
 509                         break;
 510         }
 511         if (retval != ERROR_OK)
 512                 goto done;
 513
 514 #if 0
 515         LOG_INFO("ttb1 %s ,ttb0_mask %llx",
 516                 armv8->armv8_mmu.ttbr1_used ? "used" : "not used",
 517                 armv8->armv8_mmu.ttbr0_mask);
 518 #endif
 519         if (armv8->armv8_mmu.ttbr1_used == 1) {
 520                 LOG_INFO("TTBR0 access above %" PRIx64,
 521                          (uint64_t)(armv8->armv8_mmu.ttbr0_mask));
 522                 armv8->armv8_mmu.os_border = armv8->armv8_mmu.ttbr0_mask;
 523         } else {
 524                 /*  fix me , default is hard coded LINUX border  */
 525                 armv8->armv8_mmu.os_border = 0xc0000000;
 526         }
 527 done:
 528         dpm->finish(dpm);
 529         return retval;
 530 }
 531
 532 static int armv8_4K_translate(struct target *target,  target_addr_t va, target_addr_t *val)
 533 {
 534         LOG_ERROR("4K page Address translation need to add");
 535         return ERROR_FAIL;
 536 }
 537
 538
 539 /*  method adapted to cortex A : reused arm v4 v5 method*/
 540 int armv8_mmu_translate_va(struct target *target,  target_addr_t va, target_addr_t *val)
 541 {
 542         int retval = ERROR_FAIL;
 543         struct armv8_common *armv8 = target_to_armv8(target);
 544         struct arm_dpm *dpm = armv8->arm.dpm;
 545
 546         retval = dpm->prepare(dpm);
 547         retval += armv8_read_ttbcr(target);
 548         if (retval != ERROR_OK)
 549                 goto done;
 550         if (armv8->page_size == 0)
 551                 return armv8_4K_translate(target, va, val);
 552
 553 done:
 554         dpm->finish(dpm);
 555         return ERROR_FAIL;
 556 }
 557
 558 /*  V8 method VA TO PA  */
 559 int armv8_mmu_translate_va_pa(struct target *target, target_addr_t va,
 560         target_addr_t *val, int meminfo)
 561 {
 562         return ERROR_OK;
 563 }
 564
 565 int armv8_handle_cache_info_command(struct command_context *cmd_ctx,
 566         struct armv8_cache_common *armv8_cache)
 567 {
 568         if (armv8_cache->info == -1) {
 569                 command_print(cmd_ctx, "cache not yet identified");
 570                 return ERROR_OK;
 571         }
 572
 573         if (armv8_cache->display_cache_info)
 574                 armv8_cache->display_cache_info(cmd_ctx, armv8_cache);
 575         return ERROR_OK;
 576 }
 577
 578 int armv8_init_arch_info(struct target *target, struct armv8_common *armv8)
 579 {
 580         struct arm *arm = &armv8->arm;
 581         arm->arch_info = armv8;
 582         target->arch_info = &armv8->arm;
 583         /*  target is useful in all function arm v4 5 compatible */
 584         armv8->arm.target = target;
 585         armv8->arm.common_magic = ARM_COMMON_MAGIC;
 586         armv8->common_magic = ARMV8_COMMON_MAGIC;
 587
 588         arm->read_core_reg = armv8_read_core_reg;
 589 #if 0
 590         arm->write_core_reg = armv8_write_core_reg;
 591 #endif
 592
 593         armv8->armv8_mmu.armv8_cache.l2_cache = NULL;
 594         armv8->armv8_mmu.armv8_cache.info = -1;
 595         armv8->armv8_mmu.armv8_cache.flush_all_data_cache = NULL;
 596         armv8->armv8_mmu.armv8_cache.display_cache_info = NULL;
 597         return ERROR_OK;
 598 }
 599
 600 int armv8_aarch64_state(struct target *target)
 601 {
 602         struct arm *arm = target_to_arm(target);
 603
 604         if (arm->common_magic != ARM_COMMON_MAGIC) {
 605                 LOG_ERROR("BUG: called for a non-ARM target");
 606                 return ERROR_FAIL;
 607         }
 608
 609         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
 610                 "cpsr: 0x%8.8" PRIx32 " pc: 0x%" PRIx64 "%s",
 611                 armv8_state_strings[arm->core_state],
 612                 debug_reason_name(target),
 613                 armv8_mode_name(arm->core_mode),
 614                 buf_get_u32(arm->cpsr->value, 0, 32),
 615                 buf_get_u64(arm->pc->value, 0, 64),
 616                 arm->is_semihosting ? ", semihosting" : "");
 617
 618         return ERROR_OK;
 619 }
 620
 621 int armv8_arch_state(struct target *target)
 622 {
 623         static const char * const state[] = {
 624                 "disabled", "enabled"
 625         };
 626
 627         struct armv8_common *armv8 = target_to_armv8(target);
 628         struct arm *arm = &armv8->arm;
 629
 630         if (armv8->common_magic != ARMV8_COMMON_MAGIC) {
 631                 LOG_ERROR("BUG: called for a non-Armv8 target");
 632                 return ERROR_COMMAND_SYNTAX_ERROR;
 633         }
 634
 635         if (arm->core_state == ARM_STATE_AARCH64)
 636                 armv8_aarch64_state(target);
 637         else
 638                 arm_arch_state(target);
 639
 640         LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 641                 state[armv8->armv8_mmu.mmu_enabled],
 642                 state[armv8->armv8_mmu.armv8_cache.d_u_cache_enabled],
 643                 state[armv8->armv8_mmu.armv8_cache.i_cache_enabled]);
 644
 645         if (arm->core_mode == ARM_MODE_ABT)
 646                 armv8_show_fault_registers(target);
 647
 648         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 649                 LOG_USER("Watchpoint triggered at PC %#08x",
 650                         (unsigned) armv8->dpm.wp_pc);
 651
 652         return ERROR_OK;
 653 }
 654
 655 static const struct {
 656         unsigned id;
 657         const char *name;
 658         unsigned bits;
 659         enum reg_type type;
 660         const char *group;
 661         const char *feature;
 662 } armv8_regs[] = {
 663         { ARMV8_R0,  "x0",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 664         { ARMV8_R1,  "x1",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 665         { ARMV8_R2,  "x2",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 666         { ARMV8_R3,  "x3",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 667         { ARMV8_R4,  "x4",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 668         { ARMV8_R5,  "x5",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 669         { ARMV8_R6,  "x6",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 670         { ARMV8_R7,  "x7",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 671         { ARMV8_R8,  "x8",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 672         { ARMV8_R9,  "x9",  64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 673         { ARMV8_R10, "x10", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 674         { ARMV8_R11, "x11", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 675         { ARMV8_R12, "x12", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 676         { ARMV8_R13, "x13", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 677         { ARMV8_R14, "x14", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 678         { ARMV8_R15, "x15", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 679         { ARMV8_R16, "x16", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 680         { ARMV8_R17, "x17", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 681         { ARMV8_R18, "x18", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 682         { ARMV8_R19, "x19", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 683         { ARMV8_R20, "x20", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 684         { ARMV8_R21, "x21", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 685         { ARMV8_R22, "x22", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 686         { ARMV8_R23, "x23", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 687         { ARMV8_R24, "x24", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 688         { ARMV8_R25, "x25", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 689         { ARMV8_R26, "x26", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 690         { ARMV8_R27, "x27", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 691         { ARMV8_R28, "x28", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 692         { ARMV8_R29, "x29", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 693         { ARMV8_R30, "x30", 64, REG_TYPE_UINT64, "general", "org.gnu.gdb.aarch64.core" },
 694
 695         { ARMV8_R31, "sp", 64, REG_TYPE_DATA_PTR, "general", "org.gnu.gdb.aarch64.core" },
 696         { ARMV8_PC,  "pc", 64, REG_TYPE_CODE_PTR, "general", "org.gnu.gdb.aarch64.core" },
 697
 698         { ARMV8_xPSR, "CPSR", 32, REG_TYPE_UINT32, "general", "org.gnu.gdb.aarch64.core" },
 699 };
 700
 701 #define ARMV8_NUM_REGS ARRAY_SIZE(armv8_regs)
 702
 703
 704 static int armv8_get_core_reg(struct reg *reg)
 705 {
 706         int retval;
 707         struct arm_reg *armv8_reg = reg->arch_info;
 708         struct target *target = armv8_reg->target;
 709         struct arm *arm = target_to_arm(target);
 710
 711         if (target->state != TARGET_HALTED)
 712                 return ERROR_TARGET_NOT_HALTED;
 713
 714         retval = arm->read_core_reg(target, reg, armv8_reg->num, arm->core_mode);
 715
 716         return retval;
 717 }
 718
 719 static int armv8_set_core_reg(struct reg *reg, uint8_t *buf)
 720 {
 721         struct arm_reg *armv8_reg = reg->arch_info;
 722         struct target *target = armv8_reg->target;
 723         struct arm *arm = target_to_arm(target);
 724         uint64_t value = buf_get_u64(buf, 0, 64);
 725
 726         if (target->state != TARGET_HALTED)
 727                 return ERROR_TARGET_NOT_HALTED;
 728
 729         if (reg == arm->cpsr) {
 730                 armv8_set_cpsr(arm, (uint32_t)value);
 731         } else {
 732                 buf_set_u64(reg->value, 0, 64, value);
 733                 reg->valid = 1;
 734         }
 735
 736         reg->dirty = 1;
 737
 738         return ERROR_OK;
 739 }
 740
 741 static const struct reg_arch_type armv8_reg_type = {
 742         .get = armv8_get_core_reg,
 743         .set = armv8_set_core_reg,
 744 };
 745
 746 /** Builds cache of architecturally defined registers.  */
 747 struct reg_cache *armv8_build_reg_cache(struct target *target)
 748 {
 749         struct armv8_common *armv8 = target_to_armv8(target);
 750         struct arm *arm = &armv8->arm;
 751         int num_regs = ARMV8_NUM_REGS;
 752         struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
 753         struct reg_cache *cache = malloc(sizeof(struct reg_cache));
 754         struct reg *reg_list = calloc(num_regs, sizeof(struct reg));
 755         struct arm_reg *arch_info = calloc(num_regs, sizeof(struct arm_reg));
 756         struct reg_feature *feature;
 757         int i;
 758
 759         /* Build the process context cache */
 760         cache->name = "arm v8 registers";
 761         cache->next = NULL;
 762         cache->reg_list = reg_list;
 763         cache->num_regs = num_regs;
 764         (*cache_p) = cache;
 765
 766         for (i = 0; i < num_regs; i++) {
 767                 arch_info[i].num = armv8_regs[i].id;
 768                 arch_info[i].target = target;
 769                 arch_info[i].arm = arm;
 770
 771                 reg_list[i].name = armv8_regs[i].name;
 772                 reg_list[i].size = armv8_regs[i].bits;
 773                 reg_list[i].value = calloc(1, 8);
 774                 reg_list[i].dirty = 0;
 775                 reg_list[i].valid = 0;
 776                 reg_list[i].type = &armv8_reg_type;
 777                 reg_list[i].arch_info = &arch_info[i];
 778
 779                 reg_list[i].group = armv8_regs[i].group;
 780                 reg_list[i].number = i;
 781                 reg_list[i].exist = true;
 782                 reg_list[i].caller_save = true; /* gdb defaults to true */
 783
 784                 feature = calloc(1, sizeof(struct reg_feature));
 785                 if (feature) {
 786                         feature->name = armv8_regs[i].feature;
 787                         reg_list[i].feature = feature;
 788                 } else
 789                         LOG_ERROR("unable to allocate feature list");
 790
 791                 reg_list[i].reg_data_type = calloc(1, sizeof(struct reg_data_type));
 792                 if (reg_list[i].reg_data_type)
 793                         reg_list[i].reg_data_type->type = armv8_regs[i].type;
 794                 else
 795                         LOG_ERROR("unable to allocate reg type list");
 796         }
 797
 798         arm->cpsr = reg_list + ARMV8_xPSR;
 799         arm->pc = reg_list + ARMV8_PC;
 800         arm->core_cache = cache;
 801
 802         return cache;
 803 }
 804
 805 struct reg *armv8_reg_current(struct arm *arm, unsigned regnum)
 806 {
 807         struct reg *r;
 808
 809         if (regnum > (ARMV8_LAST_REG - 1))
 810                 return NULL;
 811
 812         r = arm->core_cache->reg_list + regnum;
 813         return r;
 814 }
 815
 816 const struct command_registration armv8_command_handlers[] = {
 817         {
 818                 .chain = dap_command_handlers,
 819         },
 820         COMMAND_REGISTRATION_DONE
 821 };
 822
 823
 824 int armv8_get_gdb_reg_list(struct target *target,
 825         struct reg **reg_list[], int *reg_list_size,
 826         enum target_register_class reg_class)
 827 {
 828         struct arm *arm = target_to_arm(target);
 829         int i;
 830
 831         switch (reg_class) {
 832         case REG_CLASS_GENERAL:
 833         case REG_CLASS_ALL:
 834                 *reg_list_size = ARMV8_LAST_REG;
 835                 *reg_list = malloc(sizeof(struct reg *) * (*reg_list_size));
 836
 837                 for (i = 0; i < ARMV8_LAST_REG; i++)
 838                                 (*reg_list)[i] = armv8_reg_current(arm, i);
 839
 840                 return ERROR_OK;
 841
 842         default:
 843                 LOG_ERROR("not a valid register class type in query.");
 844                 return ERROR_FAIL;
 845                 break;
 846         }
 847 }