src/target/armv7a.c

   1 /***************************************************************************
   2  *    Copyright (C) 2009 by David Brownell                                 *
   3  *                                                                         *
   4  *    Copyright (C) ST-Ericsson SA 2011 michel.jaouen@stericsson.com       *
   5  *                                                                         *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  *                                                                         *
  11  *   This program is distributed in the hope that it will be useful,       *
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  18  ***************************************************************************/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <helper/replacements.h>
  25
  26 #include "armv7a.h"
  27 #include "arm_disassembler.h"
  28
  29 #include "register.h"
  30 #include <helper/binarybuffer.h>
  31 #include <helper/command.h>
  32
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <unistd.h>
  36
  37 #include "arm_opcodes.h"
  38 #include "target.h"
  39 #include "target_type.h"
  40
  41 static void armv7a_show_fault_registers(struct target *target)
  42 {
  43         uint32_t dfsr, ifsr, dfar, ifar;
  44         struct armv7a_common *armv7a = target_to_armv7a(target);
  45         struct arm_dpm *dpm = armv7a->arm.dpm;
  46         int retval;
  47
  48         retval = dpm->prepare(dpm);
  49         if (retval != ERROR_OK)
  50                 return;
  51
  52         /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
  53
  54         /* c5/c0 - {data, instruction} fault status registers */
  55         retval = dpm->instr_read_data_r0(dpm,
  56                         ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
  57                         &dfsr);
  58         if (retval != ERROR_OK)
  59                 goto done;
  60
  61         retval = dpm->instr_read_data_r0(dpm,
  62                         ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
  63                         &ifsr);
  64         if (retval != ERROR_OK)
  65                 goto done;
  66
  67         /* c6/c0 - {data, instruction} fault address registers */
  68         retval = dpm->instr_read_data_r0(dpm,
  69                         ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
  70                         &dfar);
  71         if (retval != ERROR_OK)
  72                 goto done;
  73
  74         retval = dpm->instr_read_data_r0(dpm,
  75                         ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
  76                         &ifar);
  77         if (retval != ERROR_OK)
  78                 goto done;
  79
  80         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  81                 ", DFAR: %8.8" PRIx32, dfsr, dfar);
  82         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  83                 ", IFAR: %8.8" PRIx32, ifsr, ifar);
  84
  85 done:
  86         /* (void) */ dpm->finish(dpm);
  87 }
  88
  89
  90 /*  retrieve main id register  */
  91 static int armv7a_read_midr(struct target *target)
  92 {
  93         int retval = ERROR_FAIL;
  94         struct armv7a_common *armv7a = target_to_armv7a(target);
  95         struct arm_dpm *dpm = armv7a->arm.dpm;
  96         uint32_t midr;
  97         retval = dpm->prepare(dpm);
  98         if (retval != ERROR_OK)
  99                 goto done;
 100         /* MRC p15,0,<Rd>,c0,c0,0; read main id register*/
 101
 102         retval = dpm->instr_read_data_r0(dpm,
 103                         ARMV4_5_MRC(15, 0, 0, 0, 0, 0),
 104                         &midr);
 105         if (retval != ERROR_OK)
 106                 goto done;
 107
 108         armv7a->rev = (midr & 0xf);
 109         armv7a->partnum = (midr >> 4) & 0xfff;
 110         armv7a->arch = (midr >> 16) & 0xf;
 111         armv7a->variant = (midr >> 20) & 0xf;
 112         armv7a->implementor = (midr >> 24) & 0xff;
 113         LOG_INFO("%s rev %" PRIx32 ", partnum %" PRIx32 ", arch %" PRIx32
 114                          ", variant %" PRIx32 ", implementor %" PRIx32,
 115                  target->cmd_name,
 116                  armv7a->rev,
 117                  armv7a->partnum,
 118                  armv7a->arch,
 119                  armv7a->variant,
 120                  armv7a->implementor);
 121
 122 done:
 123         dpm->finish(dpm);
 124         return retval;
 125 }
 126
 127 int armv7a_read_ttbcr(struct target *target)
 128 {
 129         struct armv7a_common *armv7a = target_to_armv7a(target);
 130         struct arm_dpm *dpm = armv7a->arm.dpm;
 131         uint32_t ttbcr, ttbcr_n;
 132         int ttbidx;
 133         int retval;
 134
 135         retval = dpm->prepare(dpm);
 136         if (retval != ERROR_OK)
 137                 goto done;
 138
 139         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
 140         retval = dpm->instr_read_data_r0(dpm,
 141                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
 142                         &ttbcr);
 143         if (retval != ERROR_OK)
 144                 goto done;
 145
 146         LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
 147
 148         ttbcr_n = ttbcr & 0x7;
 149         armv7a->armv7a_mmu.ttbcr = ttbcr;
 150         armv7a->armv7a_mmu.cached = 1;
 151
 152         for (ttbidx = 0; ttbidx < 2; ttbidx++) {
 153                 /*  MRC p15,0,<Rt>,c2,c0,ttbidx */
 154                 retval = dpm->instr_read_data_r0(dpm,
 155                                 ARMV4_5_MRC(15, 0, 0, 2, 0, ttbidx),
 156                                 &armv7a->armv7a_mmu.ttbr[ttbidx]);
 157                 if (retval != ERROR_OK)
 158                         goto done;
 159         }
 160
 161         /*
 162          * ARM Architecture Reference Manual (ARMv7-A and ARMv7-Redition),
 163          * document # ARM DDI 0406C
 164          */
 165         armv7a->armv7a_mmu.ttbr_range[0]  = 0xffffffff >> ttbcr_n;
 166         armv7a->armv7a_mmu.ttbr_range[1] = 0xffffffff;
 167         armv7a->armv7a_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
 168         armv7a->armv7a_mmu.ttbr_mask[1] = 0xffffffff << 14;
 169         armv7a->armv7a_mmu.cached = 1;
 170
 171         retval = armv7a_read_midr(target);
 172         if (retval != ERROR_OK)
 173                 goto done;
 174
 175         /* FIXME: why this special case based on part number? */
 176         if ((armv7a->partnum & 0xf) == 0) {
 177                 /*  ARM DDI 0344H , ARM DDI 0407F */
 178                 armv7a->armv7a_mmu.ttbr_mask[0]  = 7 << (32 - ttbcr_n);
 179         }
 180
 181         LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
 182                   (ttbcr_n != 0) ? "used" : "not used",
 183                   armv7a->armv7a_mmu.ttbr_mask[0],
 184                   armv7a->armv7a_mmu.ttbr_mask[1]);
 185
 186 done:
 187         dpm->finish(dpm);
 188         return retval;
 189 }
 190
 191 /*  method adapted to Cortex-A : reused ARM v4 v5 method */
 192 int armv7a_mmu_translate_va(struct target *target,  uint32_t va, uint32_t *val)
 193 {
 194         uint32_t first_lvl_descriptor = 0x0;
 195         uint32_t second_lvl_descriptor = 0x0;
 196         int retval;
 197         struct armv7a_common *armv7a = target_to_armv7a(target);
 198         uint32_t ttbidx = 0;    /*  default to ttbr0 */
 199         uint32_t ttb_mask;
 200         uint32_t va_mask;
 201         uint32_t ttb;
 202
 203         if (target->state != TARGET_HALTED)
 204                 LOG_INFO("target not halted, using cached values for translation table!");
 205
 206         /* if va is above the range handled by ttbr0, select ttbr1 */
 207         if (va > armv7a->armv7a_mmu.ttbr_range[0]) {
 208                 /*  select ttb 1 */
 209                 ttbidx = 1;
 210         }
 211
 212         ttb = armv7a->armv7a_mmu.ttbr[ttbidx];
 213         ttb_mask = armv7a->armv7a_mmu.ttbr_mask[ttbidx];
 214         va_mask = 0xfff00000 & armv7a->armv7a_mmu.ttbr_range[ttbidx];
 215
 216         LOG_DEBUG("ttb_mask %" PRIx32 " va_mask %" PRIx32 " ttbidx %i",
 217                   ttb_mask, va_mask, ttbidx);
 218         retval = armv7a->armv7a_mmu.read_physical_memory(target,
 219                         (ttb & ttb_mask) | ((va & va_mask) >> 18),
 220                         4, 1, (uint8_t *)&first_lvl_descriptor);
 221         if (retval != ERROR_OK)
 222                 return retval;
 223         first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
 224                         &first_lvl_descriptor);
 225         /*  reuse armv4_5 piece of code, specific armv7a changes may come later */
 226         LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor);
 227
 228         if ((first_lvl_descriptor & 0x3) == 0) {
 229                 LOG_ERROR("Address translation failure");
 230                 return ERROR_TARGET_TRANSLATION_FAULT;
 231         }
 232
 233
 234         if ((first_lvl_descriptor & 0x40002) == 2) {
 235                 /* section descriptor */
 236                 *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
 237                 return ERROR_OK;
 238         } else if ((first_lvl_descriptor & 0x40002) == 0x40002) {
 239                 /* supersection descriptor */
 240                 if (first_lvl_descriptor & 0x00f001e0) {
 241                         LOG_ERROR("Physical address does not fit into 32 bits");
 242                         return ERROR_TARGET_TRANSLATION_FAULT;
 243                 }
 244                 *val = (first_lvl_descriptor & 0xff000000) | (va & 0x00ffffff);
 245                 return ERROR_OK;
 246         }
 247
 248         /* page table */
 249         retval = armv7a->armv7a_mmu.read_physical_memory(target,
 250                         (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
 251                         4, 1, (uint8_t *)&second_lvl_descriptor);
 252         if (retval != ERROR_OK)
 253                 return retval;
 254
 255         second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
 256                         &second_lvl_descriptor);
 257
 258         LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor);
 259
 260         if ((second_lvl_descriptor & 0x3) == 0) {
 261                 LOG_ERROR("Address translation failure");
 262                 return ERROR_TARGET_TRANSLATION_FAULT;
 263         }
 264
 265         if ((second_lvl_descriptor & 0x3) == 1) {
 266                 /* large page descriptor */
 267                 *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
 268         } else {
 269                 /* small page descriptor */
 270                 *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
 271         }
 272
 273         return ERROR_OK;
 274 }
 275
 276 /*  V7 method VA TO PA  */
 277 int armv7a_mmu_translate_va_pa(struct target *target, uint32_t va,
 278         uint32_t *val, int meminfo)
 279 {
 280         int retval = ERROR_FAIL;
 281         struct armv7a_common *armv7a = target_to_armv7a(target);
 282         struct arm_dpm *dpm = armv7a->arm.dpm;
 283         uint32_t virt = va & ~0xfff;
 284         uint32_t NOS, NS, INNER, OUTER;
 285         *val = 0xdeadbeef;
 286         retval = dpm->prepare(dpm);
 287         if (retval != ERROR_OK)
 288                 goto done;
 289         /*  mmu must be enable in order to get a correct translation
 290          *  use VA to PA CP15 register for conversion */
 291         retval = dpm->instr_write_data_r0(dpm,
 292                         ARMV4_5_MCR(15, 0, 0, 7, 8, 0),
 293                         virt);
 294         if (retval != ERROR_OK)
 295                 goto done;
 296         retval = dpm->instr_read_data_r0(dpm,
 297                         ARMV4_5_MRC(15, 0, 0, 7, 4, 0),
 298                         val);
 299         /* decode memory attribute */
 300         NOS = (*val >> 10) & 1; /*  Not Outer shareable */
 301         NS = (*val >> 9) & 1;   /* Non secure */
 302         INNER = (*val >> 4) &  0x7;
 303         OUTER = (*val >> 2) & 0x3;
 304
 305         if (retval != ERROR_OK)
 306                 goto done;
 307         *val = (*val & ~0xfff)  +  (va & 0xfff);
 308         if (*val == va)
 309                 LOG_WARNING("virt = phys  : MMU disable !!");
 310         if (meminfo) {
 311                 LOG_INFO("%" PRIx32 " : %" PRIx32 " %s outer shareable %s secured",
 312                         va, *val,
 313                         NOS == 1 ? "not" : " ",
 314                         NS == 1 ? "not" : "");
 315                 switch (OUTER) {
 316                         case 0:
 317                                 LOG_INFO("outer: Non-Cacheable");
 318                                 break;
 319                         case 1:
 320                                 LOG_INFO("outer: Write-Back, Write-Allocate");
 321                                 break;
 322                         case 2:
 323                                 LOG_INFO("outer: Write-Through, No Write-Allocate");
 324                                 break;
 325                         case 3:
 326                                 LOG_INFO("outer: Write-Back, no Write-Allocate");
 327                                 break;
 328                 }
 329                 switch (INNER) {
 330                         case 0:
 331                                 LOG_INFO("inner: Non-Cacheable");
 332                                 break;
 333                         case 1:
 334                                 LOG_INFO("inner: Strongly-ordered");
 335                                 break;
 336                         case 3:
 337                                 LOG_INFO("inner: Device");
 338                                 break;
 339                         case 5:
 340                                 LOG_INFO("inner: Write-Back, Write-Allocate");
 341                                 break;
 342                         case 6:
 343                                 LOG_INFO("inner:  Write-Through");
 344                                 break;
 345                         case 7:
 346                                 LOG_INFO("inner: Write-Back, no Write-Allocate");
 347                                 break;
 348                         default:
 349                                 LOG_INFO("inner: %" PRIx32 " ???", INNER);
 350                 }
 351         }
 352
 353 done:
 354         dpm->finish(dpm);
 355
 356         return retval;
 357 }
 358
 359 /* FIXME: remove it */
 360 static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
 361 {
 362         struct armv7a_l2x_cache *l2x_cache;
 363         struct target_list *head = target->head;
 364         struct target *curr;
 365
 366         struct armv7a_common *armv7a = target_to_armv7a(target);
 367         l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
 368         l2x_cache->base = base;
 369         l2x_cache->way = way;
 370         /*LOG_INFO("cache l2 initialized base %x  way %d",
 371         l2x_cache->base,l2x_cache->way);*/
 372         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
 373                 LOG_INFO("outer cache already initialized\n");
 374         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
 375         /*  initialize all target in this cluster (smp target)
 376          *  l2 cache must be configured after smp declaration */
 377         while (head != (struct target_list *)NULL) {
 378                 curr = head->target;
 379                 if (curr != target) {
 380                         armv7a = target_to_armv7a(curr);
 381                         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
 382                                 LOG_ERROR("smp target : outer cache already initialized\n");
 383                         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
 384                 }
 385                 head = head->next;
 386         }
 387         return JIM_OK;
 388 }
 389
 390 /* FIXME: remove it */
 391 COMMAND_HANDLER(handle_cache_l2x)
 392 {
 393         struct target *target = get_current_target(CMD_CTX);
 394         uint32_t base, way;
 395
 396         if (CMD_ARGC != 2)
 397                 return ERROR_COMMAND_SYNTAX_ERROR;
 398
 399         /* command_print(CMD_CTX, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
 400         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
 401         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
 402
 403         /* AP address is in bits 31:24 of DP_SELECT */
 404         armv7a_l2x_cache_init(target, base, way);
 405
 406         return ERROR_OK;
 407 }
 408
 409 int armv7a_handle_cache_info_command(struct command_context *cmd_ctx,
 410         struct armv7a_cache_common *armv7a_cache)
 411 {
 412         struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
 413                 (armv7a_cache->outer_cache);
 414
 415         int cl;
 416
 417         if (armv7a_cache->info == -1) {
 418                 command_print(cmd_ctx, "cache not yet identified");
 419                 return ERROR_OK;
 420         }
 421
 422         for (cl = 0; cl < armv7a_cache->loc; cl++) {
 423                 struct armv7a_arch_cache *arch = &(armv7a_cache->arch[cl]);
 424
 425                 if (arch->ctype & 1) {
 426                         command_print(cmd_ctx,
 427                                 "L%d I-Cache: linelen %" PRIi32
 428                                 ", associativity %" PRIi32
 429                                 ", nsets %" PRIi32
 430                                 ", cachesize %" PRId32 " KBytes",
 431                                 cl+1,
 432                                 arch->i_size.linelen,
 433                                 arch->i_size.associativity,
 434                                 arch->i_size.nsets,
 435                                 arch->i_size.cachesize);
 436                 }
 437
 438                 if (arch->ctype >= 2) {
 439                         command_print(cmd_ctx,
 440                                 "L%d D-Cache: linelen %" PRIi32
 441                                 ", associativity %" PRIi32
 442                                 ", nsets %" PRIi32
 443                                 ", cachesize %" PRId32 " KBytes",
 444                                 cl+1,
 445                                 arch->d_u_size.linelen,
 446                                 arch->d_u_size.associativity,
 447                                 arch->d_u_size.nsets,
 448                                 arch->d_u_size.cachesize);
 449                 }
 450         }
 451
 452         if (l2x_cache != NULL)
 453                 command_print(cmd_ctx, "Outer unified cache Base Address 0x%" PRIx32 ", %" PRId32 " ways",
 454                         l2x_cache->base, l2x_cache->way);
 455
 456         return ERROR_OK;
 457 }
 458
 459 /*  retrieve core id cluster id  */
 460 static int armv7a_read_mpidr(struct target *target)
 461 {
 462         int retval = ERROR_FAIL;
 463         struct armv7a_common *armv7a = target_to_armv7a(target);
 464         struct arm_dpm *dpm = armv7a->arm.dpm;
 465         uint32_t mpidr;
 466         retval = dpm->prepare(dpm);
 467         if (retval != ERROR_OK)
 468                 goto done;
 469         /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
 470
 471         retval = dpm->instr_read_data_r0(dpm,
 472                         ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
 473                         &mpidr);
 474         if (retval != ERROR_OK)
 475                 goto done;
 476
 477         /* ARMv7R uses a different format for MPIDR.
 478          * When configured uniprocessor (most R cores) it reads as 0.
 479          * This will need to be implemented for multiprocessor ARMv7R cores. */
 480         if (armv7a->is_armv7r) {
 481                 if (mpidr)
 482                         LOG_ERROR("MPIDR nonzero in ARMv7-R target");
 483                 goto done;
 484         }
 485
 486         if (mpidr & 1<<31) {
 487                 armv7a->multi_processor_system = (mpidr >> 30) & 1;
 488                 armv7a->cluster_id = (mpidr >> 8) & 0xf;
 489                 armv7a->cpu_id = mpidr & 0x3;
 490                 LOG_INFO("%s cluster %x core %x %s", target_name(target),
 491                         armv7a->cluster_id,
 492                         armv7a->cpu_id,
 493                         armv7a->multi_processor_system == 0 ? "multi core" : "mono core");
 494
 495         } else
 496                 LOG_ERROR("MPIDR not in multiprocessor format");
 497
 498 done:
 499         dpm->finish(dpm);
 500         return retval;
 501
 502
 503 }
 504
 505 static int get_cache_info(struct arm_dpm *dpm, int cl, int ct, uint32_t *cache_reg)
 506 {
 507         int retval = ERROR_OK;
 508
 509         /*  select cache level */
 510         retval = dpm->instr_write_data_r0(dpm,
 511                         ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
 512                         (cl << 1) | (ct == 1 ? 1 : 0));
 513         if (retval != ERROR_OK)
 514                 goto done;
 515
 516         retval = dpm->instr_read_data_r0(dpm,
 517                         ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
 518                         cache_reg);
 519  done:
 520         return retval;
 521 }
 522
 523 static struct armv7a_cachesize decode_cache_reg(uint32_t cache_reg)
 524 {
 525         struct armv7a_cachesize size;
 526         int i = 0;
 527
 528         size.linelen = 16 << (cache_reg & 0x7);
 529         size.associativity = ((cache_reg >> 3) & 0x3ff) + 1;
 530         size.nsets = ((cache_reg >> 13) & 0x7fff) + 1;
 531         size.cachesize = size.linelen * size.associativity * size.nsets / 1024;
 532
 533         /*  compute info for set way operation on cache */
 534         size.index_shift = (cache_reg & 0x7) + 4;
 535         size.index = (cache_reg >> 13) & 0x7fff;
 536         size.way = ((cache_reg >> 3) & 0x3ff);
 537
 538         while (((size.way << i) & 0x80000000) == 0)
 539                 i++;
 540         size.way_shift = i;
 541
 542         return size;
 543 }
 544
 545 int armv7a_identify_cache(struct target *target)
 546 {
 547         /*  read cache descriptor */
 548         int retval = ERROR_FAIL;
 549         struct armv7a_common *armv7a = target_to_armv7a(target);
 550         struct arm_dpm *dpm = armv7a->arm.dpm;
 551         uint32_t csselr, clidr, ctr;
 552         uint32_t cache_reg;
 553         int cl, ctype;
 554         struct armv7a_cache_common *cache =
 555                 &(armv7a->armv7a_mmu.armv7a_cache);
 556
 557         retval = dpm->prepare(dpm);
 558         if (retval != ERROR_OK)
 559                 goto done;
 560
 561         /* retrieve CTR
 562          * mrc p15, 0, r0, c0, c0, 1            @ read ctr */
 563         retval = dpm->instr_read_data_r0(dpm,
 564                         ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
 565                         &ctr);
 566         if (retval != ERROR_OK)
 567                 goto done;
 568
 569         cache->iminline = 4UL << (ctr & 0xf);
 570         cache->dminline = 4UL << ((ctr & 0xf0000) >> 16);
 571         LOG_DEBUG("ctr %" PRIx32 " ctr.iminline %" PRId32 " ctr.dminline %" PRId32,
 572                  ctr, cache->iminline, cache->dminline);
 573
 574         /*  retrieve CLIDR
 575          *  mrc p15, 1, r0, c0, c0, 1           @ read clidr */
 576         retval = dpm->instr_read_data_r0(dpm,
 577                         ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
 578                         &clidr);
 579         if (retval != ERROR_OK)
 580                 goto done;
 581
 582         cache->loc = (clidr & 0x7000000) >> 24;
 583         LOG_DEBUG("Number of cache levels to PoC %" PRId32, cache->loc);
 584
 585         /*  retrieve selected cache for later restore
 586          *  MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
 587         retval = dpm->instr_read_data_r0(dpm,
 588                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 589                         &csselr);
 590         if (retval != ERROR_OK)
 591                 goto done;
 592
 593         /* retrieve all available inner caches */
 594         for (cl = 0; cl < cache->loc; clidr >>= 3, cl++) {
 595
 596                 /* isolate cache type at current level */
 597                 ctype = clidr & 7;
 598
 599                 /* skip reserved values */
 600                 if (ctype > CACHE_LEVEL_HAS_UNIFIED_CACHE)
 601                         continue;
 602
 603                 /* separate d or unified d/i cache at this level ? */
 604                 if (ctype & (CACHE_LEVEL_HAS_UNIFIED_CACHE | CACHE_LEVEL_HAS_D_CACHE)) {
 605                         /* retrieve d-cache info */
 606                         retval = get_cache_info(dpm, cl, 0, &cache_reg);
 607                         if (retval != ERROR_OK)
 608                                 goto done;
 609                         cache->arch[cl].d_u_size = decode_cache_reg(cache_reg);
 610
 611                         LOG_DEBUG("data/unified cache index %d << %d, way %d << %d",
 612                                         cache->arch[cl].d_u_size.index,
 613                                         cache->arch[cl].d_u_size.index_shift,
 614                                         cache->arch[cl].d_u_size.way,
 615                                         cache->arch[cl].d_u_size.way_shift);
 616
 617                         LOG_DEBUG("cacheline %d bytes %d KBytes asso %d ways",
 618                                         cache->arch[cl].d_u_size.linelen,
 619                                         cache->arch[cl].d_u_size.cachesize,
 620                                         cache->arch[cl].d_u_size.associativity);
 621                 }
 622
 623                 /* separate i-cache at this level ? */
 624                 if (ctype & CACHE_LEVEL_HAS_I_CACHE) {
 625                         /* retrieve i-cache info */
 626                         retval = get_cache_info(dpm, cl, 1, &cache_reg);
 627                         if (retval != ERROR_OK)
 628                                 goto done;
 629                         cache->arch[cl].i_size = decode_cache_reg(cache_reg);
 630
 631                         LOG_DEBUG("instruction cache index %d << %d, way %d << %d",
 632                                         cache->arch[cl].i_size.index,
 633                                         cache->arch[cl].i_size.index_shift,
 634                                         cache->arch[cl].i_size.way,
 635                                         cache->arch[cl].i_size.way_shift);
 636
 637                         LOG_DEBUG("cacheline %d bytes %d KBytes asso %d ways",
 638                                         cache->arch[cl].i_size.linelen,
 639                                         cache->arch[cl].i_size.cachesize,
 640                                         cache->arch[cl].i_size.associativity);
 641                 }
 642
 643                 cache->arch[cl].ctype = ctype;
 644         }
 645
 646         /*  restore selected cache  */
 647         dpm->instr_write_data_r0(dpm,
 648                 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 649                 csselr);
 650
 651         if (retval != ERROR_OK)
 652                 goto done;
 653
 654         /*  if no l2 cache initialize l1 data cache flush function function */
 655         if (armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache == NULL) {
 656                 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
 657                         armv7a_cache_auto_flush_all_data;
 658         }
 659
 660         armv7a->armv7a_mmu.armv7a_cache.info = 1;
 661 done:
 662         dpm->finish(dpm);
 663         armv7a_read_mpidr(target);
 664         return retval;
 665
 666 }
 667
 668 static int armv7a_setup_semihosting(struct target *target, int enable)
 669 {
 670         struct armv7a_common *armv7a = target_to_armv7a(target);
 671         uint32_t vcr;
 672         int ret;
 673
 674         ret = mem_ap_read_atomic_u32(armv7a->debug_ap,
 675                                          armv7a->debug_base + CPUDBG_VCR,
 676                                          &vcr);
 677         if (ret < 0) {
 678                 LOG_ERROR("Failed to read VCR register\n");
 679                 return ret;
 680         }
 681
 682         if (enable)
 683                 vcr |= DBG_VCR_SVC_MASK;
 684         else
 685                 vcr &= ~DBG_VCR_SVC_MASK;
 686
 687         ret = mem_ap_write_atomic_u32(armv7a->debug_ap,
 688                                           armv7a->debug_base + CPUDBG_VCR,
 689                                           vcr);
 690         if (ret < 0)
 691                 LOG_ERROR("Failed to write VCR register\n");
 692
 693         return ret;
 694 }
 695
 696 int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
 697 {
 698         struct arm *arm = &armv7a->arm;
 699         arm->arch_info = armv7a;
 700         target->arch_info = &armv7a->arm;
 701         arm->setup_semihosting = armv7a_setup_semihosting;
 702         /*  target is useful in all function arm v4 5 compatible */
 703         armv7a->arm.target = target;
 704         armv7a->arm.common_magic = ARM_COMMON_MAGIC;
 705         armv7a->common_magic = ARMV7_COMMON_MAGIC;
 706         armv7a->armv7a_mmu.armv7a_cache.info = -1;
 707         armv7a->armv7a_mmu.armv7a_cache.outer_cache = NULL;
 708         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
 709         armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled = 1;
 710         return ERROR_OK;
 711 }
 712
 713 int armv7a_arch_state(struct target *target)
 714 {
 715         static const char *state[] = {
 716                 "disabled", "enabled"
 717         };
 718
 719         struct armv7a_common *armv7a = target_to_armv7a(target);
 720         struct arm *arm = &armv7a->arm;
 721
 722         if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
 723                 LOG_ERROR("BUG: called for a non-ARMv7A target");
 724                 return ERROR_COMMAND_SYNTAX_ERROR;
 725         }
 726
 727         arm_arch_state(target);
 728
 729         if (armv7a->is_armv7r) {
 730                 LOG_USER("D-Cache: %s, I-Cache: %s",
 731                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 732                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 733         } else {
 734                 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 735                         state[armv7a->armv7a_mmu.mmu_enabled],
 736                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 737                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 738         }
 739
 740         if (arm->core_mode == ARM_MODE_ABT)
 741                 armv7a_show_fault_registers(target);
 742         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 743                 LOG_USER("Watchpoint triggered at PC %#08x",
 744                         (unsigned) armv7a->dpm.wp_pc);
 745
 746         return ERROR_OK;
 747 }
 748
 749 static const struct command_registration l2_cache_commands[] = {
 750         {
 751                 .name = "l2x",
 752                 .handler = handle_cache_l2x,
 753                 .mode = COMMAND_EXEC,
 754                 .help = "configure l2x cache "
 755                         "",
 756                 .usage = "[base_addr] [number_of_way]",
 757         },
 758         COMMAND_REGISTRATION_DONE
 759
 760 };
 761
 762 const struct command_registration l2x_cache_command_handlers[] = {
 763         {
 764                 .name = "cache_config",
 765                 .mode = COMMAND_EXEC,
 766                 .help = "cache configuration for a target",
 767                 .usage = "",
 768                 .chain = l2_cache_commands,
 769         },
 770         COMMAND_REGISTRATION_DONE
 771 };
 772
 773 const struct command_registration armv7a_command_handlers[] = {
 774         {
 775                 .chain = l2x_cache_command_handlers,
 776         },
 777         {
 778                 .chain = arm7a_cache_command_handlers,
 779         },
 780         COMMAND_REGISTRATION_DONE
 781 };