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   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 "armv7a_mmu.h"
  28 #include "arm_disassembler.h"
  29
  30 #include "register.h"
  31 #include <helper/binarybuffer.h>
  32 #include <helper/command.h>
  33
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <unistd.h>
  37
  38 #include "arm_opcodes.h"
  39 #include "target.h"
  40 #include "target_type.h"
  41
  42 static void armv7a_show_fault_registers(struct target *target)
  43 {
  44         uint32_t dfsr, ifsr, dfar, ifar;
  45         struct armv7a_common *armv7a = target_to_armv7a(target);
  46         struct arm_dpm *dpm = armv7a->arm.dpm;
  47         int retval;
  48
  49         retval = dpm->prepare(dpm);
  50         if (retval != ERROR_OK)
  51                 return;
  52
  53         /* ARMV4_5_MRC(cpnum, op1, r0, crn, crm, op2) */
  54
  55         /* c5/c0 - {data, instruction} fault status registers */
  56         retval = dpm->instr_read_data_r0(dpm,
  57                         ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
  58                         &dfsr);
  59         if (retval != ERROR_OK)
  60                 goto done;
  61
  62         retval = dpm->instr_read_data_r0(dpm,
  63                         ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
  64                         &ifsr);
  65         if (retval != ERROR_OK)
  66                 goto done;
  67
  68         /* c6/c0 - {data, instruction} fault address registers */
  69         retval = dpm->instr_read_data_r0(dpm,
  70                         ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
  71                         &dfar);
  72         if (retval != ERROR_OK)
  73                 goto done;
  74
  75         retval = dpm->instr_read_data_r0(dpm,
  76                         ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
  77                         &ifar);
  78         if (retval != ERROR_OK)
  79                 goto done;
  80
  81         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  82                 ", DFAR: %8.8" PRIx32, dfsr, dfar);
  83         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  84                 ", IFAR: %8.8" PRIx32, ifsr, ifar);
  85
  86 done:
  87         /* (void) */ dpm->finish(dpm);
  88 }
  89
  90
  91 /*  retrieve main id register  */
  92 static int armv7a_read_midr(struct target *target)
  93 {
  94         int retval = ERROR_FAIL;
  95         struct armv7a_common *armv7a = target_to_armv7a(target);
  96         struct arm_dpm *dpm = armv7a->arm.dpm;
  97         uint32_t midr;
  98         retval = dpm->prepare(dpm);
  99         if (retval != ERROR_OK)
 100                 goto done;
 101         /* MRC p15,0,<Rd>,c0,c0,0; read main id register*/
 102
 103         retval = dpm->instr_read_data_r0(dpm,
 104                         ARMV4_5_MRC(15, 0, 0, 0, 0, 0),
 105                         &midr);
 106         if (retval != ERROR_OK)
 107                 goto done;
 108
 109         armv7a->rev = (midr & 0xf);
 110         armv7a->partnum = (midr >> 4) & 0xfff;
 111         armv7a->arch = (midr >> 16) & 0xf;
 112         armv7a->variant = (midr >> 20) & 0xf;
 113         armv7a->implementor = (midr >> 24) & 0xff;
 114         LOG_INFO("%s rev %" PRIx32 ", partnum %" PRIx32 ", arch %" PRIx32
 115                          ", variant %" PRIx32 ", implementor %" PRIx32,
 116                  target->cmd_name,
 117                  armv7a->rev,
 118                  armv7a->partnum,
 119                  armv7a->arch,
 120                  armv7a->variant,
 121                  armv7a->implementor);
 122
 123 done:
 124         dpm->finish(dpm);
 125         return retval;
 126 }
 127
 128 int armv7a_read_ttbcr(struct target *target)
 129 {
 130         struct armv7a_common *armv7a = target_to_armv7a(target);
 131         struct arm_dpm *dpm = armv7a->arm.dpm;
 132         uint32_t ttbcr, ttbcr_n;
 133         int ttbidx;
 134         int retval;
 135
 136         retval = dpm->prepare(dpm);
 137         if (retval != ERROR_OK)
 138                 goto done;
 139
 140         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
 141         retval = dpm->instr_read_data_r0(dpm,
 142                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
 143                         &ttbcr);
 144         if (retval != ERROR_OK)
 145                 goto done;
 146
 147         LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
 148
 149         ttbcr_n = ttbcr & 0x7;
 150         armv7a->armv7a_mmu.ttbcr = ttbcr;
 151         armv7a->armv7a_mmu.cached = 1;
 152
 153         for (ttbidx = 0; ttbidx < 2; ttbidx++) {
 154                 /*  MRC p15,0,<Rt>,c2,c0,ttbidx */
 155                 retval = dpm->instr_read_data_r0(dpm,
 156                                 ARMV4_5_MRC(15, 0, 0, 2, 0, ttbidx),
 157                                 &armv7a->armv7a_mmu.ttbr[ttbidx]);
 158                 if (retval != ERROR_OK)
 159                         goto done;
 160         }
 161
 162         /*
 163          * ARM Architecture Reference Manual (ARMv7-A and ARMv7-R edition),
 164          * document # ARM DDI 0406C
 165          */
 166         armv7a->armv7a_mmu.ttbr_range[0]  = 0xffffffff >> ttbcr_n;
 167         armv7a->armv7a_mmu.ttbr_range[1] = 0xffffffff;
 168         armv7a->armv7a_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
 169         armv7a->armv7a_mmu.ttbr_mask[1] = 0xffffffff << 14;
 170         armv7a->armv7a_mmu.cached = 1;
 171
 172         retval = armv7a_read_midr(target);
 173         if (retval != ERROR_OK)
 174                 goto done;
 175
 176         /* FIXME: why this special case based on part number? */
 177         if ((armv7a->partnum & 0xf) == 0) {
 178                 /*  ARM DDI 0344H , ARM DDI 0407F */
 179                 armv7a->armv7a_mmu.ttbr_mask[0]  = 7 << (32 - ttbcr_n);
 180         }
 181
 182         LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
 183                   (ttbcr_n != 0) ? "used" : "not used",
 184                   armv7a->armv7a_mmu.ttbr_mask[0],
 185                   armv7a->armv7a_mmu.ttbr_mask[1]);
 186
 187 done:
 188         dpm->finish(dpm);
 189         return retval;
 190 }
 191
 192 /* FIXME: remove it */
 193 static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
 194 {
 195         struct armv7a_l2x_cache *l2x_cache;
 196         struct target_list *head = target->head;
 197         struct target *curr;
 198
 199         struct armv7a_common *armv7a = target_to_armv7a(target);
 200         l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
 201         l2x_cache->base = base;
 202         l2x_cache->way = way;
 203         /*LOG_INFO("cache l2 initialized base %x  way %d",
 204         l2x_cache->base,l2x_cache->way);*/
 205         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
 206                 LOG_INFO("outer cache already initialized\n");
 207         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
 208         /*  initialize all target in this cluster (smp target)
 209          *  l2 cache must be configured after smp declaration */
 210         while (head) {
 211                 curr = head->target;
 212                 if (curr != target) {
 213                         armv7a = target_to_armv7a(curr);
 214                         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
 215                                 LOG_ERROR("smp target : outer cache already initialized\n");
 216                         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
 217                 }
 218                 head = head->next;
 219         }
 220         return JIM_OK;
 221 }
 222
 223 /* FIXME: remove it */
 224 COMMAND_HANDLER(handle_cache_l2x)
 225 {
 226         struct target *target = get_current_target(CMD_CTX);
 227         uint32_t base, way;
 228
 229         if (CMD_ARGC != 2)
 230                 return ERROR_COMMAND_SYNTAX_ERROR;
 231
 232         /* command_print(CMD, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
 233         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
 234         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
 235
 236         /* AP address is in bits 31:24 of DP_SELECT */
 237         armv7a_l2x_cache_init(target, base, way);
 238
 239         return ERROR_OK;
 240 }
 241
 242 int armv7a_handle_cache_info_command(struct command_invocation *cmd,
 243         struct armv7a_cache_common *armv7a_cache)
 244 {
 245         struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
 246                 (armv7a_cache->outer_cache);
 247
 248         int cl;
 249
 250         if (armv7a_cache->info == -1) {
 251                 command_print(cmd, "cache not yet identified");
 252                 return ERROR_OK;
 253         }
 254
 255         for (cl = 0; cl < armv7a_cache->loc; cl++) {
 256                 struct armv7a_arch_cache *arch = &(armv7a_cache->arch[cl]);
 257
 258                 if (arch->ctype & 1) {
 259                         command_print(cmd,
 260                                 "L%d I-Cache: linelen %" PRIu32
 261                                 ", associativity %" PRIu32
 262                                 ", nsets %" PRIu32
 263                                 ", cachesize %" PRIu32 " KBytes",
 264                                 cl+1,
 265                                 arch->i_size.linelen,
 266                                 arch->i_size.associativity,
 267                                 arch->i_size.nsets,
 268                                 arch->i_size.cachesize);
 269                 }
 270
 271                 if (arch->ctype >= 2) {
 272                         command_print(cmd,
 273                                 "L%d D-Cache: linelen %" PRIu32
 274                                 ", associativity %" PRIu32
 275                                 ", nsets %" PRIu32
 276                                 ", cachesize %" PRIu32 " KBytes",
 277                                 cl+1,
 278                                 arch->d_u_size.linelen,
 279                                 arch->d_u_size.associativity,
 280                                 arch->d_u_size.nsets,
 281                                 arch->d_u_size.cachesize);
 282                 }
 283         }
 284
 285         if (l2x_cache)
 286                 command_print(cmd, "Outer unified cache Base Address 0x%" PRIx32 ", %" PRIu32 " ways",
 287                         l2x_cache->base, l2x_cache->way);
 288
 289         return ERROR_OK;
 290 }
 291
 292 /*  retrieve core id cluster id  */
 293 static int armv7a_read_mpidr(struct target *target)
 294 {
 295         int retval = ERROR_FAIL;
 296         struct armv7a_common *armv7a = target_to_armv7a(target);
 297         struct arm_dpm *dpm = armv7a->arm.dpm;
 298         uint32_t mpidr;
 299         retval = dpm->prepare(dpm);
 300         if (retval != ERROR_OK)
 301                 goto done;
 302         /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
 303
 304         retval = dpm->instr_read_data_r0(dpm,
 305                         ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
 306                         &mpidr);
 307         if (retval != ERROR_OK)
 308                 goto done;
 309
 310         /* Is register in Multiprocessing Extensions register format? */
 311         if (mpidr & MPIDR_MP_EXT) {
 312                 LOG_DEBUG("%s: MPIDR 0x%" PRIx32, target_name(target), mpidr);
 313                 armv7a->multi_processor_system = (mpidr >> 30) & 1;
 314                 armv7a->multi_threading_processor = (mpidr >> 24) & 1;
 315                 armv7a->level2_id = (mpidr >> 16) & 0xf;
 316                 armv7a->cluster_id = (mpidr >> 8) & 0xf;
 317                 armv7a->cpu_id = mpidr & 0xf;
 318                 LOG_INFO("%s: MPIDR level2 %x, cluster %x, core %x, %s, %s",
 319                         target_name(target),
 320                         armv7a->level2_id,
 321                         armv7a->cluster_id,
 322                         armv7a->cpu_id,
 323                         armv7a->multi_processor_system == 0 ? "multi core" : "mono core",
 324                         armv7a->multi_threading_processor == 1 ? "SMT" : "no SMT");
 325
 326         } else
 327                 LOG_ERROR("MPIDR not in multiprocessor format");
 328
 329 done:
 330         dpm->finish(dpm);
 331         return retval;
 332
 333
 334 }
 335
 336 static int get_cache_info(struct arm_dpm *dpm, int cl, int ct, uint32_t *cache_reg)
 337 {
 338         int retval = ERROR_OK;
 339
 340         /*  select cache level */
 341         retval = dpm->instr_write_data_r0(dpm,
 342                         ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
 343                         (cl << 1) | (ct == 1 ? 1 : 0));
 344         if (retval != ERROR_OK)
 345                 goto done;
 346
 347         retval = dpm->instr_read_data_r0(dpm,
 348                         ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
 349                         cache_reg);
 350  done:
 351         return retval;
 352 }
 353
 354 static struct armv7a_cachesize decode_cache_reg(uint32_t cache_reg)
 355 {
 356         struct armv7a_cachesize size;
 357         int i = 0;
 358
 359         size.linelen = 16 << (cache_reg & 0x7);
 360         size.associativity = ((cache_reg >> 3) & 0x3ff) + 1;
 361         size.nsets = ((cache_reg >> 13) & 0x7fff) + 1;
 362         size.cachesize = size.linelen * size.associativity * size.nsets / 1024;
 363
 364         /*  compute info for set way operation on cache */
 365         size.index_shift = (cache_reg & 0x7) + 4;
 366         size.index = (cache_reg >> 13) & 0x7fff;
 367         size.way = ((cache_reg >> 3) & 0x3ff);
 368
 369         while (((size.way << i) & 0x80000000) == 0)
 370                 i++;
 371         size.way_shift = i;
 372
 373         return size;
 374 }
 375
 376 int armv7a_identify_cache(struct target *target)
 377 {
 378         /*  read cache descriptor */
 379         int retval = ERROR_FAIL;
 380         struct armv7a_common *armv7a = target_to_armv7a(target);
 381         struct arm_dpm *dpm = armv7a->arm.dpm;
 382         uint32_t csselr, clidr, ctr;
 383         uint32_t cache_reg;
 384         int cl, ctype;
 385         struct armv7a_cache_common *cache =
 386                 &(armv7a->armv7a_mmu.armv7a_cache);
 387
 388         retval = dpm->prepare(dpm);
 389         if (retval != ERROR_OK)
 390                 goto done;
 391
 392         /* retrieve CTR
 393          * mrc p15, 0, r0, c0, c0, 1            @ read ctr */
 394         retval = dpm->instr_read_data_r0(dpm,
 395                         ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
 396                         &ctr);
 397         if (retval != ERROR_OK)
 398                 goto done;
 399
 400         cache->iminline = 4UL << (ctr & 0xf);
 401         cache->dminline = 4UL << ((ctr & 0xf0000) >> 16);
 402         LOG_DEBUG("ctr %" PRIx32 " ctr.iminline %" PRIu32 " ctr.dminline %" PRIu32,
 403                  ctr, cache->iminline, cache->dminline);
 404
 405         /*  retrieve CLIDR
 406          *  mrc p15, 1, r0, c0, c0, 1           @ read clidr */
 407         retval = dpm->instr_read_data_r0(dpm,
 408                         ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
 409                         &clidr);
 410         if (retval != ERROR_OK)
 411                 goto done;
 412
 413         cache->loc = (clidr & 0x7000000) >> 24;
 414         LOG_DEBUG("Number of cache levels to PoC %" PRId32, cache->loc);
 415
 416         /*  retrieve selected cache for later restore
 417          *  MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
 418         retval = dpm->instr_read_data_r0(dpm,
 419                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 420                         &csselr);
 421         if (retval != ERROR_OK)
 422                 goto done;
 423
 424         /* retrieve all available inner caches */
 425         for (cl = 0; cl < cache->loc; clidr >>= 3, cl++) {
 426
 427                 /* isolate cache type at current level */
 428                 ctype = clidr & 7;
 429
 430                 /* skip reserved values */
 431                 if (ctype > CACHE_LEVEL_HAS_UNIFIED_CACHE)
 432                         continue;
 433
 434                 /* separate d or unified d/i cache at this level ? */
 435                 if (ctype & (CACHE_LEVEL_HAS_UNIFIED_CACHE | CACHE_LEVEL_HAS_D_CACHE)) {
 436                         /* retrieve d-cache info */
 437                         retval = get_cache_info(dpm, cl, 0, &cache_reg);
 438                         if (retval != ERROR_OK)
 439                                 goto done;
 440                         cache->arch[cl].d_u_size = decode_cache_reg(cache_reg);
 441
 442                         LOG_DEBUG("data/unified cache index %" PRIu32 " << %" PRIu32 ", way %" PRIu32 " << %" PRIu32,
 443                                         cache->arch[cl].d_u_size.index,
 444                                         cache->arch[cl].d_u_size.index_shift,
 445                                         cache->arch[cl].d_u_size.way,
 446                                         cache->arch[cl].d_u_size.way_shift);
 447
 448                         LOG_DEBUG("cacheline %" PRIu32 " bytes %" PRIu32 " KBytes asso %" PRIu32 " ways",
 449                                         cache->arch[cl].d_u_size.linelen,
 450                                         cache->arch[cl].d_u_size.cachesize,
 451                                         cache->arch[cl].d_u_size.associativity);
 452                 }
 453
 454                 /* separate i-cache at this level ? */
 455                 if (ctype & CACHE_LEVEL_HAS_I_CACHE) {
 456                         /* retrieve i-cache info */
 457                         retval = get_cache_info(dpm, cl, 1, &cache_reg);
 458                         if (retval != ERROR_OK)
 459                                 goto done;
 460                         cache->arch[cl].i_size = decode_cache_reg(cache_reg);
 461
 462                         LOG_DEBUG("instruction cache index %" PRIu32 " << %" PRIu32 ", way %" PRIu32 " << %" PRIu32,
 463                                         cache->arch[cl].i_size.index,
 464                                         cache->arch[cl].i_size.index_shift,
 465                                         cache->arch[cl].i_size.way,
 466                                         cache->arch[cl].i_size.way_shift);
 467
 468                         LOG_DEBUG("cacheline %" PRIu32 " bytes %" PRIu32 " KBytes asso %" PRIu32 " ways",
 469                                         cache->arch[cl].i_size.linelen,
 470                                         cache->arch[cl].i_size.cachesize,
 471                                         cache->arch[cl].i_size.associativity);
 472                 }
 473
 474                 cache->arch[cl].ctype = ctype;
 475         }
 476
 477         /*  restore selected cache  */
 478         dpm->instr_write_data_r0(dpm,
 479                 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 480                 csselr);
 481
 482         if (retval != ERROR_OK)
 483                 goto done;
 484
 485         /*  if no l2 cache initialize l1 data cache flush function function */
 486         if (!armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache) {
 487                 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
 488                         armv7a_cache_auto_flush_all_data;
 489         }
 490
 491         armv7a->armv7a_mmu.armv7a_cache.info = 1;
 492 done:
 493         dpm->finish(dpm);
 494         armv7a_read_mpidr(target);
 495         return retval;
 496
 497 }
 498
 499 static int armv7a_setup_semihosting(struct target *target, int enable)
 500 {
 501         struct armv7a_common *armv7a = target_to_armv7a(target);
 502         uint32_t vcr;
 503         int ret;
 504
 505         ret = mem_ap_read_atomic_u32(armv7a->debug_ap,
 506                                          armv7a->debug_base + CPUDBG_VCR,
 507                                          &vcr);
 508         if (ret < 0) {
 509                 LOG_ERROR("Failed to read VCR register\n");
 510                 return ret;
 511         }
 512
 513         if (enable)
 514                 vcr |= DBG_VCR_SVC_MASK;
 515         else
 516                 vcr &= ~DBG_VCR_SVC_MASK;
 517
 518         ret = mem_ap_write_atomic_u32(armv7a->debug_ap,
 519                                           armv7a->debug_base + CPUDBG_VCR,
 520                                           vcr);
 521         if (ret < 0)
 522                 LOG_ERROR("Failed to write VCR register\n");
 523
 524         return ret;
 525 }
 526
 527 int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
 528 {
 529         struct arm *arm = &armv7a->arm;
 530         arm->arch_info = armv7a;
 531         target->arch_info = &armv7a->arm;
 532         arm->setup_semihosting = armv7a_setup_semihosting;
 533         /*  target is useful in all function arm v4 5 compatible */
 534         armv7a->arm.target = target;
 535         armv7a->arm.common_magic = ARM_COMMON_MAGIC;
 536         armv7a->common_magic = ARMV7_COMMON_MAGIC;
 537         armv7a->armv7a_mmu.armv7a_cache.info = -1;
 538         armv7a->armv7a_mmu.armv7a_cache.outer_cache = NULL;
 539         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
 540         armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled = 1;
 541         return ERROR_OK;
 542 }
 543
 544 int armv7a_arch_state(struct target *target)
 545 {
 546         static const char *state[] = {
 547                 "disabled", "enabled"
 548         };
 549
 550         struct armv7a_common *armv7a = target_to_armv7a(target);
 551         struct arm *arm = &armv7a->arm;
 552
 553         if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
 554                 LOG_ERROR("BUG: called for a non-ARMv7A target");
 555                 return ERROR_COMMAND_SYNTAX_ERROR;
 556         }
 557
 558         arm_arch_state(target);
 559
 560         if (armv7a->is_armv7r) {
 561                 LOG_USER("D-Cache: %s, I-Cache: %s",
 562                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 563                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 564         } else {
 565                 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 566                         state[armv7a->armv7a_mmu.mmu_enabled],
 567                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 568                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 569         }
 570
 571         if (arm->core_mode == ARM_MODE_ABT)
 572                 armv7a_show_fault_registers(target);
 573
 574         return ERROR_OK;
 575 }
 576
 577 static const struct command_registration l2_cache_commands[] = {
 578         {
 579                 .name = "l2x",
 580                 .handler = handle_cache_l2x,
 581                 .mode = COMMAND_EXEC,
 582                 .help = "configure l2x cache",
 583                 .usage = "[base_addr] [number_of_way]",
 584         },
 585         COMMAND_REGISTRATION_DONE
 586
 587 };
 588
 589 static const struct command_registration l2x_cache_command_handlers[] = {
 590         {
 591                 .name = "cache_config",
 592                 .mode = COMMAND_EXEC,
 593                 .help = "cache configuration for a target",
 594                 .usage = "",
 595                 .chain = l2_cache_commands,
 596         },
 597         COMMAND_REGISTRATION_DONE
 598 };
 599
 600 const struct command_registration armv7a_command_handlers[] = {
 601         {
 602                 .chain = l2x_cache_command_handlers,
 603         },
 604         {
 605                 .chain = arm7a_cache_command_handlers,
 606         },
 607         COMMAND_REGISTRATION_DONE
 608 };