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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, write to the                         *
  18  *   Free Software Foundation, Inc.,                                       *
  19  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  20  ***************************************************************************/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include <helper/replacements.h>
  27
  28 #include "armv7a.h"
  29 #include "arm_disassembler.h"
  30
  31 #include "register.h"
  32 #include <helper/binarybuffer.h>
  33 #include <helper/command.h>
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <unistd.h>
  38
  39 #include "arm_opcodes.h"
  40 #include "target.h"
  41 #include "target_type.h"
  42
  43 static void armv7a_show_fault_registers(struct target *target)
  44 {
  45         uint32_t dfsr, ifsr, dfar, ifar;
  46         struct armv7a_common *armv7a = target_to_armv7a(target);
  47         struct arm_dpm *dpm = armv7a->arm.dpm;
  48         int retval;
  49
  50         retval = dpm->prepare(dpm);
  51         if (retval != ERROR_OK)
  52                 return;
  53
  54         /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
  55
  56         /* c5/c0 - {data, instruction} fault status registers */
  57         retval = dpm->instr_read_data_r0(dpm,
  58                         ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
  59                         &dfsr);
  60         if (retval != ERROR_OK)
  61                 goto done;
  62
  63         retval = dpm->instr_read_data_r0(dpm,
  64                         ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
  65                         &ifsr);
  66         if (retval != ERROR_OK)
  67                 goto done;
  68
  69         /* c6/c0 - {data, instruction} fault address registers */
  70         retval = dpm->instr_read_data_r0(dpm,
  71                         ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
  72                         &dfar);
  73         if (retval != ERROR_OK)
  74                 goto done;
  75
  76         retval = dpm->instr_read_data_r0(dpm,
  77                         ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
  78                         &ifar);
  79         if (retval != ERROR_OK)
  80                 goto done;
  81
  82         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  83                 ", DFAR: %8.8" PRIx32, dfsr, dfar);
  84         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  85                 ", IFAR: %8.8" PRIx32, ifsr, ifar);
  86
  87 done:
  88         /* (void) */ dpm->finish(dpm);
  89 }
  90
  91
  92 /*  retrieve main id register  */
  93 static int armv7a_read_midr(struct target *target)
  94 {
  95         int retval = ERROR_FAIL;
  96         struct armv7a_common *armv7a = target_to_armv7a(target);
  97         struct arm_dpm *dpm = armv7a->arm.dpm;
  98         uint32_t midr;
  99         retval = dpm->prepare(dpm);
 100         if (retval != ERROR_OK)
 101                 goto done;
 102         /* MRC p15,0,<Rd>,c0,c0,0; read main id register*/
 103
 104         retval = dpm->instr_read_data_r0(dpm,
 105                         ARMV4_5_MRC(15, 0, 0, 0, 0, 0),
 106                         &midr);
 107         if (retval != ERROR_OK)
 108                 goto done;
 109
 110         armv7a->rev = (midr & 0xf);
 111         armv7a->partnum = (midr >> 4) & 0xfff;
 112         armv7a->arch = (midr >> 16) & 0xf;
 113         armv7a->variant = (midr >> 20) & 0xf;
 114         armv7a->implementor = (midr >> 24) & 0xff;
 115         LOG_INFO("%s rev %" PRIx32 ", partnum %" PRIx32 ", arch %" PRIx32
 116                          ", variant %" PRIx32 ", implementor %" PRIx32,
 117                  target->cmd_name,
 118                  armv7a->rev,
 119                  armv7a->partnum,
 120                  armv7a->arch,
 121                  armv7a->variant,
 122                  armv7a->implementor);
 123
 124 done:
 125         dpm->finish(dpm);
 126         return retval;
 127 }
 128
 129 static int armv7a_read_ttbcr(struct target *target)
 130 {
 131         struct armv7a_common *armv7a = target_to_armv7a(target);
 132         struct arm_dpm *dpm = armv7a->arm.dpm;
 133         uint32_t ttbcr, ttbcr_n;
 134         int retval = dpm->prepare(dpm);
 135         if (retval != ERROR_OK)
 136                 goto done;
 137         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
 138         retval = dpm->instr_read_data_r0(dpm,
 139                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
 140                         &ttbcr);
 141         if (retval != ERROR_OK)
 142                 goto done;
 143
 144         LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
 145
 146         ttbcr_n = ttbcr & 0x7;
 147         armv7a->armv7a_mmu.ttbcr = ttbcr;
 148         armv7a->armv7a_mmu.cached = 1;
 149
 150         /*
 151          * ARM Architecture Reference Manual (ARMv7-A and ARMv7-Redition),
 152          * document # ARM DDI 0406C
 153          */
 154         armv7a->armv7a_mmu.ttbr_range[0]  = 0xffffffff >> ttbcr_n;
 155         armv7a->armv7a_mmu.ttbr_range[1] = 0xffffffff;
 156         armv7a->armv7a_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
 157         armv7a->armv7a_mmu.ttbr_mask[1] = 0xffffffff << 14;
 158         armv7a->armv7a_mmu.cached = 1;
 159
 160         retval = armv7a_read_midr(target);
 161         if (retval != ERROR_OK)
 162                 goto done;
 163
 164         /* FIXME: why this special case based on part number? */
 165         if ((armv7a->partnum & 0xf) == 0) {
 166                 /*  ARM DDI 0344H , ARM DDI 0407F */
 167                 armv7a->armv7a_mmu.ttbr_mask[0]  = 7 << (32 - ttbcr_n);
 168         }
 169
 170         LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
 171                   (ttbcr_n != 0) ? "used" : "not used",
 172                   armv7a->armv7a_mmu.ttbr_mask[0],
 173                   armv7a->armv7a_mmu.ttbr_mask[1]);
 174
 175         /* FIXME: default is hard coded LINUX border  */
 176         armv7a->armv7a_mmu.os_border = 0xc0000000;
 177         if (ttbcr_n != 0) {
 178                 LOG_INFO("SVC access above %" PRIx32,
 179                         armv7a->armv7a_mmu.ttbr_range[0] + 1);
 180                 armv7a->armv7a_mmu.os_border = armv7a->armv7a_mmu.ttbr_range[0] + 1;
 181         }
 182 done:
 183         dpm->finish(dpm);
 184         return retval;
 185 }
 186
 187 /*  method adapted to cortex A : reused arm v4 v5 method*/
 188 int armv7a_mmu_translate_va(struct target *target,  uint32_t va, uint32_t *val)
 189 {
 190         uint32_t first_lvl_descriptor = 0x0;
 191         uint32_t second_lvl_descriptor = 0x0;
 192         int retval;
 193         struct armv7a_common *armv7a = target_to_armv7a(target);
 194         struct arm_dpm *dpm = armv7a->arm.dpm;
 195         uint32_t ttbidx = 0;    /*  default to ttbr0 */
 196         uint32_t ttb_mask;
 197         uint32_t va_mask;
 198         uint32_t ttbcr;
 199         uint32_t ttb;
 200
 201         retval = dpm->prepare(dpm);
 202         if (retval != ERROR_OK)
 203                 goto done;
 204
 205         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
 206         retval = dpm->instr_read_data_r0(dpm,
 207                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
 208                         &ttbcr);
 209         if (retval != ERROR_OK)
 210                 goto done;
 211
 212         /* if ttbcr has changed or was not read before, re-read the information */
 213         if ((armv7a->armv7a_mmu.cached == 0) ||
 214                 (armv7a->armv7a_mmu.ttbcr != ttbcr)) {
 215                 armv7a_read_ttbcr(target);
 216         }
 217
 218         /* if va is above the range handled by ttbr0, select ttbr1 */
 219         if (va > armv7a->armv7a_mmu.ttbr_range[0]) {
 220                 /*  select ttb 1 */
 221                 ttbidx = 1;
 222         }
 223         /*  MRC p15,0,<Rt>,c2,c0,ttbidx */
 224         retval = dpm->instr_read_data_r0(dpm,
 225                         ARMV4_5_MRC(15, 0, 0, 2, 0, ttbidx),
 226                         &ttb);
 227         if (retval != ERROR_OK)
 228                 return retval;
 229
 230         ttb_mask = armv7a->armv7a_mmu.ttbr_mask[ttbidx];
 231         va_mask = 0xfff00000 & armv7a->armv7a_mmu.ttbr_range[ttbidx];
 232
 233         LOG_DEBUG("ttb_mask %" PRIx32 " va_mask %" PRIx32 " ttbidx %i",
 234                   ttb_mask, va_mask, ttbidx);
 235         retval = armv7a->armv7a_mmu.read_physical_memory(target,
 236                         (ttb & ttb_mask) | ((va & va_mask) >> 18),
 237                         4, 1, (uint8_t *)&first_lvl_descriptor);
 238         if (retval != ERROR_OK)
 239                 return retval;
 240         first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
 241                         &first_lvl_descriptor);
 242         /*  reuse armv4_5 piece of code, specific armv7a changes may come later */
 243         LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor);
 244
 245         if ((first_lvl_descriptor & 0x3) == 0) {
 246                 LOG_ERROR("Address translation failure");
 247                 return ERROR_TARGET_TRANSLATION_FAULT;
 248         }
 249
 250
 251         if ((first_lvl_descriptor & 0x40002) == 2) {
 252                 /* section descriptor */
 253                 *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
 254                 return ERROR_OK;
 255         } else if ((first_lvl_descriptor & 0x40002) == 0x40002) {
 256                 /* supersection descriptor */
 257                 if (first_lvl_descriptor & 0x00f001e0) {
 258                         LOG_ERROR("Physical address does not fit into 32 bits");
 259                         return ERROR_TARGET_TRANSLATION_FAULT;
 260                 }
 261                 *val = (first_lvl_descriptor & 0xff000000) | (va & 0x00ffffff);
 262                 return ERROR_OK;
 263         }
 264
 265         /* page table */
 266         retval = armv7a->armv7a_mmu.read_physical_memory(target,
 267                         (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
 268                         4, 1, (uint8_t *)&second_lvl_descriptor);
 269         if (retval != ERROR_OK)
 270                 return retval;
 271
 272         second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
 273                         &second_lvl_descriptor);
 274
 275         LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor);
 276
 277         if ((second_lvl_descriptor & 0x3) == 0) {
 278                 LOG_ERROR("Address translation failure");
 279                 return ERROR_TARGET_TRANSLATION_FAULT;
 280         }
 281
 282         if ((second_lvl_descriptor & 0x3) == 1) {
 283                 /* large page descriptor */
 284                 *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
 285         } else {
 286                 /* small page descriptor */
 287                 *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
 288         }
 289
 290         return ERROR_OK;
 291
 292 done:
 293         return retval;
 294 }
 295
 296 /*  V7 method VA TO PA  */
 297 int armv7a_mmu_translate_va_pa(struct target *target, uint32_t va,
 298         uint32_t *val, int meminfo)
 299 {
 300         int retval = ERROR_FAIL;
 301         struct armv7a_common *armv7a = target_to_armv7a(target);
 302         struct arm_dpm *dpm = armv7a->arm.dpm;
 303         uint32_t virt = va & ~0xfff;
 304         uint32_t NOS, NS, INNER, OUTER;
 305         *val = 0xdeadbeef;
 306         retval = dpm->prepare(dpm);
 307         if (retval != ERROR_OK)
 308                 goto done;
 309         /*  mmu must be enable in order to get a correct translation
 310          *  use VA to PA CP15 register for conversion */
 311         retval = dpm->instr_write_data_r0(dpm,
 312                         ARMV4_5_MCR(15, 0, 0, 7, 8, 0),
 313                         virt);
 314         if (retval != ERROR_OK)
 315                 goto done;
 316         retval = dpm->instr_read_data_r0(dpm,
 317                         ARMV4_5_MRC(15, 0, 0, 7, 4, 0),
 318                         val);
 319         /* decode memory attribute */
 320         NOS = (*val >> 10) & 1; /*  Not Outer shareable */
 321         NS = (*val >> 9) & 1;   /* Non secure */
 322         INNER = (*val >> 4) &  0x7;
 323         OUTER = (*val >> 2) & 0x3;
 324
 325         if (retval != ERROR_OK)
 326                 goto done;
 327         *val = (*val & ~0xfff)  +  (va & 0xfff);
 328         if (*val == va)
 329                 LOG_WARNING("virt = phys  : MMU disable !!");
 330         if (meminfo) {
 331                 LOG_INFO("%" PRIx32 " : %" PRIx32 " %s outer shareable %s secured",
 332                         va, *val,
 333                         NOS == 1 ? "not" : " ",
 334                         NS == 1 ? "not" : "");
 335                 switch (OUTER) {
 336                         case 0:
 337                                 LOG_INFO("outer: Non-Cacheable");
 338                                 break;
 339                         case 1:
 340                                 LOG_INFO("outer: Write-Back, Write-Allocate");
 341                                 break;
 342                         case 2:
 343                                 LOG_INFO("outer: Write-Through, No Write-Allocate");
 344                                 break;
 345                         case 3:
 346                                 LOG_INFO("outer: Write-Back, no Write-Allocate");
 347                                 break;
 348                 }
 349                 switch (INNER) {
 350                         case 0:
 351                                 LOG_INFO("inner: Non-Cacheable");
 352                                 break;
 353                         case 1:
 354                                 LOG_INFO("inner: Strongly-ordered");
 355                                 break;
 356                         case 3:
 357                                 LOG_INFO("inner: Device");
 358                                 break;
 359                         case 5:
 360                                 LOG_INFO("inner: Write-Back, Write-Allocate");
 361                                 break;
 362                         case 6:
 363                                 LOG_INFO("inner:  Write-Through");
 364                                 break;
 365                         case 7:
 366                                 LOG_INFO("inner: Write-Back, no Write-Allocate");
 367
 368                         default:
 369                                 LOG_INFO("inner: %" PRIx32 " ???", INNER);
 370                 }
 371         }
 372
 373 done:
 374         dpm->finish(dpm);
 375
 376         return retval;
 377 }
 378
 379 static int armv7a_handle_inner_cache_info_command(struct command_context *cmd_ctx,
 380         struct armv7a_cache_common *armv7a_cache)
 381 {
 382         if (armv7a_cache->ctype == -1) {
 383                 command_print(cmd_ctx, "cache not yet identified");
 384                 return ERROR_OK;
 385         }
 386
 387         command_print(cmd_ctx,
 388                 "D-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
 389                 armv7a_cache->d_u_size.linelen,
 390                 armv7a_cache->d_u_size.associativity,
 391                 armv7a_cache->d_u_size.nsets,
 392                 armv7a_cache->d_u_size.cachesize);
 393
 394         command_print(cmd_ctx,
 395                 "I-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
 396                 armv7a_cache->i_size.linelen,
 397                 armv7a_cache->i_size.associativity,
 398                 armv7a_cache->i_size.nsets,
 399                 armv7a_cache->i_size.cachesize);
 400
 401         return ERROR_OK;
 402 }
 403
 404 static int _armv7a_flush_all_data(struct target *target)
 405 {
 406         struct armv7a_common *armv7a = target_to_armv7a(target);
 407         struct arm_dpm *dpm = armv7a->arm.dpm;
 408         struct armv7a_cachesize *d_u_size =
 409                 &(armv7a->armv7a_mmu.armv7a_cache.d_u_size);
 410         int32_t c_way, c_index = d_u_size->index;
 411         int retval;
 412         /*  check that cache data is on at target halt */
 413         if (!armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled) {
 414                 LOG_INFO("flushed not performed :cache not on at target halt");
 415                 return ERROR_OK;
 416         }
 417         retval = dpm->prepare(dpm);
 418         if (retval != ERROR_OK)
 419                 goto done;
 420         do {
 421                 c_way = d_u_size->way;
 422                 do {
 423                         uint32_t value = (c_index << d_u_size->index_shift)
 424                                 | (c_way << d_u_size->way_shift);
 425                         /*  DCCISW */
 426                         /* LOG_INFO ("%d %d %x",c_way,c_index,value); */
 427                         retval = dpm->instr_write_data_r0(dpm,
 428                                         ARMV4_5_MCR(15, 0, 0, 7, 14, 2),
 429                                         value);
 430                         if (retval != ERROR_OK)
 431                                 goto done;
 432                         c_way -= 1;
 433                 } while (c_way >= 0);
 434                 c_index -= 1;
 435         } while (c_index >= 0);
 436         return retval;
 437 done:
 438         LOG_ERROR("flushed failed");
 439         dpm->finish(dpm);
 440         return retval;
 441 }
 442
 443 static int  armv7a_flush_all_data(struct target *target)
 444 {
 445         int retval = ERROR_FAIL;
 446         /*  check that armv7a_cache is correctly identify */
 447         struct armv7a_common *armv7a = target_to_armv7a(target);
 448         if (armv7a->armv7a_mmu.armv7a_cache.ctype == -1) {
 449                 LOG_ERROR("trying to flush un-identified cache");
 450                 return retval;
 451         }
 452
 453         if (target->smp) {
 454                 /*  look if all the other target have been flushed in order to flush level
 455                  *  2 */
 456                 struct target_list *head;
 457                 struct target *curr;
 458                 head = target->head;
 459                 while (head != (struct target_list *)NULL) {
 460                         curr = head->target;
 461                         if (curr->state == TARGET_HALTED) {
 462                                 LOG_INFO("Wait flushing data l1 on core %" PRId32, curr->coreid);
 463                                 retval = _armv7a_flush_all_data(curr);
 464                         }
 465                         head = head->next;
 466                 }
 467         } else
 468                 retval = _armv7a_flush_all_data(target);
 469         return retval;
 470 }
 471
 472 /* L2 is not specific to armv7a  a specific file is needed */
 473 static int armv7a_l2x_flush_all_data(struct target *target)
 474 {
 475
 476 #define L2X0_CLEAN_INV_WAY              0x7FC
 477         int retval = ERROR_FAIL;
 478         struct armv7a_common *armv7a = target_to_armv7a(target);
 479         struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
 480                 (armv7a->armv7a_mmu.armv7a_cache.l2_cache);
 481         uint32_t base = l2x_cache->base;
 482         uint32_t l2_way = l2x_cache->way;
 483         uint32_t l2_way_val = (1 << l2_way) - 1;
 484         retval = armv7a_flush_all_data(target);
 485         if (retval != ERROR_OK)
 486                 return retval;
 487         retval = target->type->write_phys_memory(target,
 488                         (uint32_t)(base+(uint32_t)L2X0_CLEAN_INV_WAY),
 489                         (uint32_t)4,
 490                         (uint32_t)1,
 491                         (uint8_t *)&l2_way_val);
 492         return retval;
 493 }
 494
 495 static int armv7a_handle_l2x_cache_info_command(struct command_context *cmd_ctx,
 496         struct armv7a_cache_common *armv7a_cache)
 497 {
 498
 499         struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
 500                 (armv7a_cache->l2_cache);
 501
 502         if (armv7a_cache->ctype == -1) {
 503                 command_print(cmd_ctx, "cache not yet identified");
 504                 return ERROR_OK;
 505         }
 506
 507         command_print(cmd_ctx,
 508                 "L1 D-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
 509                 armv7a_cache->d_u_size.linelen,
 510                 armv7a_cache->d_u_size.associativity,
 511                 armv7a_cache->d_u_size.nsets,
 512                 armv7a_cache->d_u_size.cachesize);
 513
 514         command_print(cmd_ctx,
 515                 "L1 I-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
 516                 armv7a_cache->i_size.linelen,
 517                 armv7a_cache->i_size.associativity,
 518                 armv7a_cache->i_size.nsets,
 519                 armv7a_cache->i_size.cachesize);
 520         command_print(cmd_ctx, "L2 unified cache Base Address 0x%" PRIx32 ", %" PRId32 " ways",
 521                 l2x_cache->base, l2x_cache->way);
 522
 523
 524         return ERROR_OK;
 525 }
 526
 527
 528 static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
 529 {
 530         struct armv7a_l2x_cache *l2x_cache;
 531         struct target_list *head = target->head;
 532         struct target *curr;
 533
 534         struct armv7a_common *armv7a = target_to_armv7a(target);
 535         l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
 536         l2x_cache->base = base;
 537         l2x_cache->way = way;
 538         /*LOG_INFO("cache l2 initialized base %x  way %d",
 539         l2x_cache->base,l2x_cache->way);*/
 540         if (armv7a->armv7a_mmu.armv7a_cache.l2_cache)
 541                 LOG_INFO("cache l2 already initialized\n");
 542         armv7a->armv7a_mmu.armv7a_cache.l2_cache = l2x_cache;
 543         /*  initialize l1 / l2x cache function  */
 544         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache
 545                 = armv7a_l2x_flush_all_data;
 546         armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
 547                 armv7a_handle_l2x_cache_info_command;
 548         /*  initialize all target in this cluster (smp target)
 549          *  l2 cache must be configured after smp declaration */
 550         while (head != (struct target_list *)NULL) {
 551                 curr = head->target;
 552                 if (curr != target) {
 553                         armv7a = target_to_armv7a(curr);
 554                         if (armv7a->armv7a_mmu.armv7a_cache.l2_cache)
 555                                 LOG_ERROR("smp target : cache l2 already initialized\n");
 556                         armv7a->armv7a_mmu.armv7a_cache.l2_cache = l2x_cache;
 557                         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
 558                                 armv7a_l2x_flush_all_data;
 559                         armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
 560                                 armv7a_handle_l2x_cache_info_command;
 561                 }
 562                 head = head->next;
 563         }
 564         return JIM_OK;
 565 }
 566
 567 COMMAND_HANDLER(handle_cache_l2x)
 568 {
 569         struct target *target = get_current_target(CMD_CTX);
 570         uint32_t base, way;
 571
 572         if (CMD_ARGC != 2)
 573                 return ERROR_COMMAND_SYNTAX_ERROR;
 574
 575         /* command_print(CMD_CTX, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
 576         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
 577         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
 578
 579         /* AP address is in bits 31:24 of DP_SELECT */
 580         armv7a_l2x_cache_init(target, base, way);
 581
 582         return ERROR_OK;
 583 }
 584
 585 int armv7a_handle_cache_info_command(struct command_context *cmd_ctx,
 586         struct armv7a_cache_common *armv7a_cache)
 587 {
 588         if (armv7a_cache->ctype == -1) {
 589                 command_print(cmd_ctx, "cache not yet identified");
 590                 return ERROR_OK;
 591         }
 592
 593         if (armv7a_cache->display_cache_info)
 594                 armv7a_cache->display_cache_info(cmd_ctx, armv7a_cache);
 595         return ERROR_OK;
 596 }
 597
 598 /*  retrieve core id cluster id  */
 599 static int armv7a_read_mpidr(struct target *target)
 600 {
 601         int retval = ERROR_FAIL;
 602         struct armv7a_common *armv7a = target_to_armv7a(target);
 603         struct arm_dpm *dpm = armv7a->arm.dpm;
 604         uint32_t mpidr;
 605         retval = dpm->prepare(dpm);
 606         if (retval != ERROR_OK)
 607                 goto done;
 608         /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
 609
 610         retval = dpm->instr_read_data_r0(dpm,
 611                         ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
 612                         &mpidr);
 613         if (retval != ERROR_OK)
 614                 goto done;
 615
 616         /* ARMv7R uses a different format for MPIDR.
 617          * When configured uniprocessor (most R cores) it reads as 0.
 618          * This will need to be implemented for multiprocessor ARMv7R cores. */
 619         if (armv7a->is_armv7r) {
 620                 if (mpidr)
 621                         LOG_ERROR("MPIDR nonzero in ARMv7-R target");
 622                 goto done;
 623         }
 624
 625         if (mpidr & 1<<31) {
 626                 armv7a->multi_processor_system = (mpidr >> 30) & 1;
 627                 armv7a->cluster_id = (mpidr >> 8) & 0xf;
 628                 armv7a->cpu_id = mpidr & 0x3;
 629                 LOG_INFO("%s cluster %x core %x %s", target_name(target),
 630                         armv7a->cluster_id,
 631                         armv7a->cpu_id,
 632                         armv7a->multi_processor_system == 0 ? "multi core" : "mono core");
 633
 634         } else
 635                 LOG_ERROR("MPIDR not in multiprocessor format");
 636
 637 done:
 638         dpm->finish(dpm);
 639         return retval;
 640
 641
 642 }
 643
 644 int armv7a_identify_cache(struct target *target)
 645 {
 646         /*  read cache descriptor */
 647         int retval = ERROR_FAIL;
 648         struct armv7a_common *armv7a = target_to_armv7a(target);
 649         struct arm_dpm *dpm = armv7a->arm.dpm;
 650         uint32_t cache_selected, clidr;
 651         uint32_t cache_i_reg, cache_d_reg;
 652         struct armv7a_cache_common *cache = &(armv7a->armv7a_mmu.armv7a_cache);
 653         if (!armv7a->is_armv7r)
 654                 armv7a_read_ttbcr(target);
 655         retval = dpm->prepare(dpm);
 656
 657         if (retval != ERROR_OK)
 658                 goto done;
 659         /*  retrieve CLIDR
 660          *  mrc p15, 1, r0, c0, c0, 1           @ read clidr */
 661         retval = dpm->instr_read_data_r0(dpm,
 662                         ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
 663                         &clidr);
 664         if (retval != ERROR_OK)
 665                 goto done;
 666         clidr = (clidr & 0x7000000) >> 23;
 667         LOG_INFO("number of cache level %" PRIx32, (uint32_t)(clidr / 2));
 668         if ((clidr / 2) > 1) {
 669                 /* FIXME not supported present in cortex A8 and later */
 670                 /*  in cortex A7, A15 */
 671                 LOG_ERROR("cache l2 present :not supported");
 672         }
 673         /*  retrieve selected cache
 674          *  MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
 675         retval = dpm->instr_read_data_r0(dpm,
 676                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 677                         &cache_selected);
 678         if (retval != ERROR_OK)
 679                 goto done;
 680
 681         retval = armv7a->arm.mrc(target, 15,
 682                         2, 0,   /* op1, op2 */
 683                         0, 0,   /* CRn, CRm */
 684                         &cache_selected);
 685         if (retval != ERROR_OK)
 686                 goto done;
 687         /* select instruction cache
 688          *  MCR p15, 2,<Rd>, c0, c0, 0; Write CSSELR
 689          *  [0]  : 1 instruction cache selection , 0 data cache selection */
 690         retval = dpm->instr_write_data_r0(dpm,
 691                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 692                         1);
 693         if (retval != ERROR_OK)
 694                 goto done;
 695
 696         /* read CCSIDR
 697          * MRC P15,1,<RT>,C0, C0,0 ;on cortex A9 read CCSIDR
 698          * [2:0] line size  001 eight word per line
 699          * [27:13] NumSet 0x7f 16KB, 0xff 32Kbytes, 0x1ff 64Kbytes */
 700         retval = dpm->instr_read_data_r0(dpm,
 701                         ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
 702                         &cache_i_reg);
 703         if (retval != ERROR_OK)
 704                 goto done;
 705
 706         /*  select data cache*/
 707         retval = dpm->instr_write_data_r0(dpm,
 708                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 709                         0);
 710         if (retval != ERROR_OK)
 711                 goto done;
 712
 713         retval = dpm->instr_read_data_r0(dpm,
 714                         ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
 715                         &cache_d_reg);
 716         if (retval != ERROR_OK)
 717                 goto done;
 718
 719         /*  restore selected cache  */
 720         dpm->instr_write_data_r0(dpm,
 721                 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
 722                 cache_selected);
 723
 724         if (retval != ERROR_OK)
 725                 goto done;
 726         dpm->finish(dpm);
 727
 728         /* put fake type */
 729         cache->d_u_size.linelen = 16 << (cache_d_reg & 0x7);
 730         cache->d_u_size.cachesize = (((cache_d_reg >> 13) & 0x7fff)+1)/8;
 731         cache->d_u_size.nsets = (cache_d_reg >> 13) & 0x7fff;
 732         cache->d_u_size.associativity = ((cache_d_reg >> 3) & 0x3ff) + 1;
 733         /*  compute info for set way operation on cache */
 734         cache->d_u_size.index_shift = (cache_d_reg & 0x7) + 4;
 735         cache->d_u_size.index = (cache_d_reg >> 13) & 0x7fff;
 736         cache->d_u_size.way = ((cache_d_reg >> 3) & 0x3ff);
 737         cache->d_u_size.way_shift = cache->d_u_size.way + 1;
 738         {
 739                 int i = 0;
 740                 while (((cache->d_u_size.way_shift >> i) & 1) != 1)
 741                         i++;
 742                 cache->d_u_size.way_shift = 32-i;
 743         }
 744 #if 0
 745         LOG_INFO("data cache index %d << %d, way %d << %d",
 746                         cache->d_u_size.index, cache->d_u_size.index_shift,
 747                         cache->d_u_size.way,
 748                         cache->d_u_size.way_shift);
 749
 750         LOG_INFO("data cache %d bytes %d KBytes asso %d ways",
 751                         cache->d_u_size.linelen,
 752                         cache->d_u_size.cachesize,
 753                         cache->d_u_size.associativity);
 754 #endif
 755         cache->i_size.linelen = 16 << (cache_i_reg & 0x7);
 756         cache->i_size.associativity = ((cache_i_reg >> 3) & 0x3ff) + 1;
 757         cache->i_size.nsets = (cache_i_reg >> 13) & 0x7fff;
 758         cache->i_size.cachesize = (((cache_i_reg >> 13) & 0x7fff)+1)/8;
 759         /*  compute info for set way operation on cache */
 760         cache->i_size.index_shift = (cache_i_reg & 0x7) + 4;
 761         cache->i_size.index = (cache_i_reg >> 13) & 0x7fff;
 762         cache->i_size.way = ((cache_i_reg >> 3) & 0x3ff);
 763         cache->i_size.way_shift = cache->i_size.way + 1;
 764         {
 765                 int i = 0;
 766                 while (((cache->i_size.way_shift >> i) & 1) != 1)
 767                         i++;
 768                 cache->i_size.way_shift = 32-i;
 769         }
 770 #if 0
 771         LOG_INFO("instruction cache index %d << %d, way %d << %d",
 772                         cache->i_size.index, cache->i_size.index_shift,
 773                         cache->i_size.way, cache->i_size.way_shift);
 774
 775         LOG_INFO("instruction cache %d bytes %d KBytes asso %d ways",
 776                         cache->i_size.linelen,
 777                         cache->i_size.cachesize,
 778                         cache->i_size.associativity);
 779 #endif
 780         /*  if no l2 cache initialize l1 data cache flush function function */
 781         if (armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache == NULL) {
 782                 armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
 783                         armv7a_handle_inner_cache_info_command;
 784                 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
 785                         armv7a_flush_all_data;
 786         }
 787         armv7a->armv7a_mmu.armv7a_cache.ctype = 0;
 788
 789 done:
 790         dpm->finish(dpm);
 791         armv7a_read_mpidr(target);
 792         return retval;
 793
 794 }
 795
 796 int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
 797 {
 798         struct arm *arm = &armv7a->arm;
 799         arm->arch_info = armv7a;
 800         target->arch_info = &armv7a->arm;
 801         /*  target is useful in all function arm v4 5 compatible */
 802         armv7a->arm.target = target;
 803         armv7a->arm.common_magic = ARM_COMMON_MAGIC;
 804         armv7a->common_magic = ARMV7_COMMON_MAGIC;
 805         armv7a->armv7a_mmu.armv7a_cache.l2_cache = NULL;
 806         armv7a->armv7a_mmu.armv7a_cache.ctype = -1;
 807         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
 808         armv7a->armv7a_mmu.armv7a_cache.display_cache_info = NULL;
 809         return ERROR_OK;
 810 }
 811
 812 int armv7a_arch_state(struct target *target)
 813 {
 814         static const char *state[] = {
 815                 "disabled", "enabled"
 816         };
 817
 818         struct armv7a_common *armv7a = target_to_armv7a(target);
 819         struct arm *arm = &armv7a->arm;
 820
 821         if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
 822                 LOG_ERROR("BUG: called for a non-ARMv7A target");
 823                 return ERROR_COMMAND_SYNTAX_ERROR;
 824         }
 825
 826         arm_arch_state(target);
 827
 828         if (armv7a->is_armv7r) {
 829                 LOG_USER("D-Cache: %s, I-Cache: %s",
 830                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 831                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 832         } else {
 833                 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 834                         state[armv7a->armv7a_mmu.mmu_enabled],
 835                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
 836                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
 837         }
 838
 839         if (arm->core_mode == ARM_MODE_ABT)
 840                 armv7a_show_fault_registers(target);
 841         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 842                 LOG_USER("Watchpoint triggered at PC %#08x",
 843                         (unsigned) armv7a->dpm.wp_pc);
 844
 845         return ERROR_OK;
 846 }
 847
 848 static const struct command_registration l2_cache_commands[] = {
 849         {
 850                 .name = "l2x",
 851                 .handler = handle_cache_l2x,
 852                 .mode = COMMAND_EXEC,
 853                 .help = "configure l2x cache "
 854                         "",
 855                 .usage = "[base_addr] [number_of_way]",
 856         },
 857         COMMAND_REGISTRATION_DONE
 858
 859 };
 860
 861 const struct command_registration l2x_cache_command_handlers[] = {
 862         {
 863                 .name = "cache_config",
 864                 .mode = COMMAND_EXEC,
 865                 .help = "cache configuration for a target",
 866                 .usage = "",
 867                 .chain = l2_cache_commands,
 868         },
 869         COMMAND_REGISTRATION_DONE
 870 };
 871
 872
 873 const struct command_registration armv7a_command_handlers[] = {
 874         {
 875                 .chain = dap_command_handlers,
 876         },
 877         {
 878                 .chain = l2x_cache_command_handlers,
 879         },
 880         COMMAND_REGISTRATION_DONE
 881 };