arch/arm/mach-imx/hab.c

   1 /*
   2  * Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:    GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <config.h>
   9 #include <fuse.h>
  10 #include <asm/io.h>
  11 #include <asm/system.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/sys_proto.h>
  14 #include <asm/mach-imx/hab.h>
  15
  16 /* -------- start of HAB API updates ------------*/
  17
  18 #define hab_rvt_report_event_p                                  \
  19 (                                                               \
  20         (is_mx6dqp()) ?                                         \
  21         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :  \
  22         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
  23         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :  \
  24         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
  25         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :  \
  26         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT)        \
  27 )
  28
  29 #define hab_rvt_report_status_p                                 \
  30 (                                                               \
  31         (is_mx6dqp()) ?                                         \
  32         ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
  33         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
  34         ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
  35         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
  36         ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
  37         ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS)      \
  38 )
  39
  40 #define hab_rvt_authenticate_image_p                            \
  41 (                                                               \
  42         (is_mx6dqp()) ?                                         \
  43         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
  44         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
  45         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
  46         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
  47         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
  48         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE)    \
  49 )
  50
  51 #define hab_rvt_entry_p                                         \
  52 (                                                               \
  53         (is_mx6dqp()) ?                                         \
  54         ((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :                \
  55         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
  56         ((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :                \
  57         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
  58         ((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :                \
  59         ((hab_rvt_entry_t *)HAB_RVT_ENTRY)                      \
  60 )
  61
  62 #define hab_rvt_exit_p                                          \
  63 (                                                               \
  64         (is_mx6dqp()) ?                                         \
  65         ((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :                  \
  66         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
  67         ((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :                  \
  68         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
  69         ((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :                  \
  70         ((hab_rvt_exit_t *)HAB_RVT_EXIT)                        \
  71 )
  72
  73 static inline void hab_rvt_failsafe_new(void)
  74 {
  75 }
  76
  77 #define hab_rvt_failsafe_p                              \
  78 (                                                       \
  79         (is_mx6dqp()) ?                                 \
  80         ((hab_rvt_failsafe_t *)hab_rvt_failsafe_new) :  \
  81         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?   \
  82         ((hab_rvt_failsafe_t *)hab_rvt_failsafe_new) :  \
  83         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?  \
  84         ((hab_rvt_failsafe_t *)hab_rvt_failsafe_new) :  \
  85         ((hab_rvt_failsafe_t *)HAB_RVT_FAILSAFE)        \
  86 )
  87
  88 static inline enum hab_status hab_rvt_check_target_new(enum hab_target target,
  89                                                        const void *start,
  90                                                        size_t bytes)
  91 {
  92         return HAB_SUCCESS;
  93 }
  94
  95 #define hab_rvt_check_target_p                                  \
  96 (                                                               \
  97         (is_mx6dqp()) ?                                         \
  98         ((hab_rvt_check_target_t *)hab_rvt_check_target_new) :  \
  99         (is_mx6dq() && (soc_rev() >= CHIP_REV_1_5)) ?           \
 100         ((hab_rvt_check_target_t *)hab_rvt_check_target_new) :  \
 101         (is_mx6sdl() && (soc_rev() >= CHIP_REV_1_2)) ?          \
 102         ((hab_rvt_check_target_t *)hab_rvt_check_target_new) :  \
 103         ((hab_rvt_check_target_t *)HAB_RVT_CHECK_TARGET)        \
 104 )
 105
 106 #define ALIGN_SIZE              0x1000
 107 #define MX6DQ_PU_IROM_MMU_EN_VAR        0x009024a8
 108 #define MX6DLS_PU_IROM_MMU_EN_VAR       0x00901dd0
 109 #define MX6SL_PU_IROM_MMU_EN_VAR        0x00900a18
 110 #define IS_HAB_ENABLED_BIT \
 111         (is_soc_type(MXC_SOC_MX7ULP) ? 0x80000000 :     \
 112          (is_soc_type(MXC_SOC_MX7) ? 0x2000000 : 0x2))
 113
 114 static int ivt_header_error(const char *err_str, struct ivt_header *ivt_hdr)
 115 {
 116         printf("%s magic=0x%x length=0x%02x version=0x%x\n", err_str,
 117                ivt_hdr->magic, ivt_hdr->length, ivt_hdr->version);
 118
 119         return 1;
 120 }
 121
 122 static int verify_ivt_header(struct ivt_header *ivt_hdr)
 123 {
 124         int result = 0;
 125
 126         if (ivt_hdr->magic != IVT_HEADER_MAGIC)
 127                 result = ivt_header_error("bad magic", ivt_hdr);
 128
 129         if (be16_to_cpu(ivt_hdr->length) != IVT_TOTAL_LENGTH)
 130                 result = ivt_header_error("bad length", ivt_hdr);
 131
 132         if (ivt_hdr->version != IVT_HEADER_V1 &&
 133             ivt_hdr->version != IVT_HEADER_V2)
 134                 result = ivt_header_error("bad version", ivt_hdr);
 135
 136         return result;
 137 }
 138
 139 #if !defined(CONFIG_SPL_BUILD)
 140
 141 #define MAX_RECORD_BYTES     (8*1024) /* 4 kbytes */
 142
 143 struct record {
 144         uint8_t  tag;                                           /* Tag */
 145         uint8_t  len[2];                                        /* Length */
 146         uint8_t  par;                                           /* Version */
 147         uint8_t  contents[MAX_RECORD_BYTES];/* Record Data */
 148         bool     any_rec_flag;
 149 };
 150
 151 static char *rsn_str[] = {
 152                           "RSN = HAB_RSN_ANY (0x00)\n",
 153                           "RSN = HAB_ENG_FAIL (0x30)\n",
 154                           "RSN = HAB_INV_ADDRESS (0x22)\n",
 155                           "RSN = HAB_INV_ASSERTION (0x0C)\n",
 156                           "RSN = HAB_INV_CALL (0x28)\n",
 157                           "RSN = HAB_INV_CERTIFICATE (0x21)\n",
 158                           "RSN = HAB_INV_COMMAND (0x06)\n",
 159                           "RSN = HAB_INV_CSF (0x11)\n",
 160                           "RSN = HAB_INV_DCD (0x27)\n",
 161                           "RSN = HAB_INV_INDEX (0x0F)\n",
 162                           "RSN = HAB_INV_IVT (0x05)\n",
 163                           "RSN = HAB_INV_KEY (0x1D)\n",
 164                           "RSN = HAB_INV_RETURN (0x1E)\n",
 165                           "RSN = HAB_INV_SIGNATURE (0x18)\n",
 166                           "RSN = HAB_INV_SIZE (0x17)\n",
 167                           "RSN = HAB_MEM_FAIL (0x2E)\n",
 168                           "RSN = HAB_OVR_COUNT (0x2B)\n",
 169                           "RSN = HAB_OVR_STORAGE (0x2D)\n",
 170                           "RSN = HAB_UNS_ALGORITHM (0x12)\n",
 171                           "RSN = HAB_UNS_COMMAND (0x03)\n",
 172                           "RSN = HAB_UNS_ENGINE (0x0A)\n",
 173                           "RSN = HAB_UNS_ITEM (0x24)\n",
 174                           "RSN = HAB_UNS_KEY (0x1B)\n",
 175                           "RSN = HAB_UNS_PROTOCOL (0x14)\n",
 176                           "RSN = HAB_UNS_STATE (0x09)\n",
 177                           "RSN = INVALID\n",
 178                           NULL
 179 };
 180
 181 static char *sts_str[] = {
 182                           "STS = HAB_SUCCESS (0xF0)\n",
 183                           "STS = HAB_FAILURE (0x33)\n",
 184                           "STS = HAB_WARNING (0x69)\n",
 185                           "STS = INVALID\n",
 186                           NULL
 187 };
 188
 189 static char *eng_str[] = {
 190                           "ENG = HAB_ENG_ANY (0x00)\n",
 191                           "ENG = HAB_ENG_SCC (0x03)\n",
 192                           "ENG = HAB_ENG_RTIC (0x05)\n",
 193                           "ENG = HAB_ENG_SAHARA (0x06)\n",
 194                           "ENG = HAB_ENG_CSU (0x0A)\n",
 195                           "ENG = HAB_ENG_SRTC (0x0C)\n",
 196                           "ENG = HAB_ENG_DCP (0x1B)\n",
 197                           "ENG = HAB_ENG_CAAM (0x1D)\n",
 198                           "ENG = HAB_ENG_SNVS (0x1E)\n",
 199                           "ENG = HAB_ENG_OCOTP (0x21)\n",
 200                           "ENG = HAB_ENG_DTCP (0x22)\n",
 201                           "ENG = HAB_ENG_ROM (0x36)\n",
 202                           "ENG = HAB_ENG_HDCP (0x24)\n",
 203                           "ENG = HAB_ENG_RTL (0x77)\n",
 204                           "ENG = HAB_ENG_SW (0xFF)\n",
 205                           "ENG = INVALID\n",
 206                           NULL
 207 };
 208
 209 static char *ctx_str[] = {
 210                           "CTX = HAB_CTX_ANY(0x00)\n",
 211                           "CTX = HAB_CTX_FAB (0xFF)\n",
 212                           "CTX = HAB_CTX_ENTRY (0xE1)\n",
 213                           "CTX = HAB_CTX_TARGET (0x33)\n",
 214                           "CTX = HAB_CTX_AUTHENTICATE (0x0A)\n",
 215                           "CTX = HAB_CTX_DCD (0xDD)\n",
 216                           "CTX = HAB_CTX_CSF (0xCF)\n",
 217                           "CTX = HAB_CTX_COMMAND (0xC0)\n",
 218                           "CTX = HAB_CTX_AUT_DAT (0xDB)\n",
 219                           "CTX = HAB_CTX_ASSERT (0xA0)\n",
 220                           "CTX = HAB_CTX_EXIT (0xEE)\n",
 221                           "CTX = INVALID\n",
 222                           NULL
 223 };
 224
 225 static uint8_t hab_statuses[5] = {
 226         HAB_STS_ANY,
 227         HAB_FAILURE,
 228         HAB_WARNING,
 229         HAB_SUCCESS,
 230         -1
 231 };
 232
 233 static uint8_t hab_reasons[26] = {
 234         HAB_RSN_ANY,
 235         HAB_ENG_FAIL,
 236         HAB_INV_ADDRESS,
 237         HAB_INV_ASSERTION,
 238         HAB_INV_CALL,
 239         HAB_INV_CERTIFICATE,
 240         HAB_INV_COMMAND,
 241         HAB_INV_CSF,
 242         HAB_INV_DCD,
 243         HAB_INV_INDEX,
 244         HAB_INV_IVT,
 245         HAB_INV_KEY,
 246         HAB_INV_RETURN,
 247         HAB_INV_SIGNATURE,
 248         HAB_INV_SIZE,
 249         HAB_MEM_FAIL,
 250         HAB_OVR_COUNT,
 251         HAB_OVR_STORAGE,
 252         HAB_UNS_ALGORITHM,
 253         HAB_UNS_COMMAND,
 254         HAB_UNS_ENGINE,
 255         HAB_UNS_ITEM,
 256         HAB_UNS_KEY,
 257         HAB_UNS_PROTOCOL,
 258         HAB_UNS_STATE,
 259         -1
 260 };
 261
 262 static uint8_t hab_contexts[12] = {
 263         HAB_CTX_ANY,
 264         HAB_CTX_FAB,
 265         HAB_CTX_ENTRY,
 266         HAB_CTX_TARGET,
 267         HAB_CTX_AUTHENTICATE,
 268         HAB_CTX_DCD,
 269         HAB_CTX_CSF,
 270         HAB_CTX_COMMAND,
 271         HAB_CTX_AUT_DAT,
 272         HAB_CTX_ASSERT,
 273         HAB_CTX_EXIT,
 274         -1
 275 };
 276
 277 static uint8_t hab_engines[16] = {
 278         HAB_ENG_ANY,
 279         HAB_ENG_SCC,
 280         HAB_ENG_RTIC,
 281         HAB_ENG_SAHARA,
 282         HAB_ENG_CSU,
 283         HAB_ENG_SRTC,
 284         HAB_ENG_DCP,
 285         HAB_ENG_CAAM,
 286         HAB_ENG_SNVS,
 287         HAB_ENG_OCOTP,
 288         HAB_ENG_DTCP,
 289         HAB_ENG_ROM,
 290         HAB_ENG_HDCP,
 291         HAB_ENG_RTL,
 292         HAB_ENG_SW,
 293         -1
 294 };
 295
 296 static inline uint8_t get_idx(uint8_t *list, uint8_t tgt)
 297 {
 298         uint8_t idx = 0;
 299         uint8_t element = list[idx];
 300         while (element != -1) {
 301                 if (element == tgt)
 302                         return idx;
 303                 element = list[++idx];
 304         }
 305         return -1;
 306 }
 307
 308 static void process_event_record(uint8_t *event_data, size_t bytes)
 309 {
 310         struct record *rec = (struct record *)event_data;
 311
 312         printf("\n\n%s", sts_str[get_idx(hab_statuses, rec->contents[0])]);
 313         printf("%s", rsn_str[get_idx(hab_reasons, rec->contents[1])]);
 314         printf("%s", ctx_str[get_idx(hab_contexts, rec->contents[2])]);
 315         printf("%s", eng_str[get_idx(hab_engines, rec->contents[3])]);
 316 }
 317
 318 static void display_event(uint8_t *event_data, size_t bytes)
 319 {
 320         uint32_t i;
 321
 322         if (!(event_data && bytes > 0))
 323                 return;
 324
 325         for (i = 0; i < bytes; i++) {
 326                 if (i == 0)
 327                         printf("\t0x%02x", event_data[i]);
 328                 else if ((i % 8) == 0)
 329                         printf("\n\t0x%02x", event_data[i]);
 330                 else
 331                         printf(" 0x%02x", event_data[i]);
 332         }
 333
 334         process_event_record(event_data, bytes);
 335 }
 336
 337 static int get_hab_status(void)
 338 {
 339         uint32_t index = 0; /* Loop index */
 340         uint8_t event_data[128]; /* Event data buffer */
 341         size_t bytes = sizeof(event_data); /* Event size in bytes */
 342         enum hab_config config = 0;
 343         enum hab_state state = 0;
 344         hab_rvt_report_event_t *hab_rvt_report_event;
 345         hab_rvt_report_status_t *hab_rvt_report_status;
 346
 347         hab_rvt_report_event = hab_rvt_report_event_p;
 348         hab_rvt_report_status = hab_rvt_report_status_p;
 349
 350         if (imx_hab_is_enabled())
 351                 puts("\nSecure boot enabled\n");
 352         else
 353                 puts("\nSecure boot disabled\n");
 354
 355         /* Check HAB status */
 356         if (hab_rvt_report_status(&config, &state) != HAB_SUCCESS) {
 357                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
 358                        config, state);
 359
 360                 /* Display HAB Error events */
 361                 while (hab_rvt_report_event(HAB_FAILURE, index, event_data,
 362                                         &bytes) == HAB_SUCCESS) {
 363                         puts("\n");
 364                         printf("--------- HAB Event %d -----------------\n",
 365                                index + 1);
 366                         puts("event data:\n");
 367                         display_event(event_data, bytes);
 368                         puts("\n");
 369                         bytes = sizeof(event_data);
 370                         index++;
 371                 }
 372         }
 373         /* Display message if no HAB events are found */
 374         else {
 375                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
 376                        config, state);
 377                 puts("No HAB Events Found!\n\n");
 378         }
 379         return 0;
 380 }
 381
 382 static int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc,
 383                          char * const argv[])
 384 {
 385         if ((argc != 1)) {
 386                 cmd_usage(cmdtp);
 387                 return 1;
 388         }
 389
 390         get_hab_status();
 391
 392         return 0;
 393 }
 394
 395 static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc,
 396                                  char * const argv[])
 397 {
 398         ulong   addr, length, ivt_offset;
 399         int     rcode = 0;
 400
 401         if (argc < 4)
 402                 return CMD_RET_USAGE;
 403
 404         addr = simple_strtoul(argv[1], NULL, 16);
 405         length = simple_strtoul(argv[2], NULL, 16);
 406         ivt_offset = simple_strtoul(argv[3], NULL, 16);
 407
 408         rcode = imx_hab_authenticate_image(addr, length, ivt_offset);
 409         if (rcode == 0)
 410                 rcode = CMD_RET_SUCCESS;
 411         else
 412                 rcode = CMD_RET_FAILURE;
 413
 414         return rcode;
 415 }
 416
 417 U_BOOT_CMD(
 418                 hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
 419                 "display HAB status",
 420                 ""
 421           );
 422
 423 U_BOOT_CMD(
 424                 hab_auth_img, 4, 0, do_authenticate_image,
 425                 "authenticate image via HAB",
 426                 "addr length ivt_offset\n"
 427                 "addr - image hex address\n"
 428                 "length - image hex length\n"
 429                 "ivt_offset - hex offset of IVT in the image"
 430           );
 431
 432
 433 #endif /* !defined(CONFIG_SPL_BUILD) */
 434
 435 bool imx_hab_is_enabled(void)
 436 {
 437         struct imx_sec_config_fuse_t *fuse =
 438                 (struct imx_sec_config_fuse_t *)&imx_sec_config_fuse;
 439         uint32_t reg;
 440         int ret;
 441
 442         ret = fuse_read(fuse->bank, fuse->word, &reg);
 443         if (ret) {
 444                 puts("\nSecure boot fuse read error\n");
 445                 return ret;
 446         }
 447
 448         return (reg & IS_HAB_ENABLED_BIT) == IS_HAB_ENABLED_BIT;
 449 }
 450
 451 int imx_hab_authenticate_image(uint32_t ddr_start, uint32_t image_size,
 452                                uint32_t ivt_offset)
 453 {
 454         uint32_t load_addr = 0;
 455         size_t bytes;
 456         uint32_t ivt_addr = 0;
 457         int result = 1;
 458         ulong start;
 459         hab_rvt_authenticate_image_t *hab_rvt_authenticate_image;
 460         hab_rvt_entry_t *hab_rvt_entry;
 461         hab_rvt_exit_t *hab_rvt_exit;
 462         hab_rvt_check_target_t *hab_rvt_check_target;
 463         struct ivt *ivt;
 464         struct ivt_header *ivt_hdr;
 465         enum hab_status status;
 466
 467         hab_rvt_authenticate_image = hab_rvt_authenticate_image_p;
 468         hab_rvt_entry = hab_rvt_entry_p;
 469         hab_rvt_exit = hab_rvt_exit_p;
 470         hab_rvt_check_target = hab_rvt_check_target_p;
 471
 472         if (!imx_hab_is_enabled()) {
 473                 puts("hab fuse not enabled\n");
 474                 return 0;
 475         }
 476
 477         printf("\nAuthenticate image from DDR location 0x%x...\n",
 478                ddr_start);
 479
 480         hab_caam_clock_enable(1);
 481
 482         /* Calculate IVT address header */
 483         ivt_addr = ddr_start + ivt_offset;
 484         ivt = (struct ivt *)ivt_addr;
 485         ivt_hdr = &ivt->hdr;
 486
 487         /* Verify IVT header bugging out on error */
 488         if (verify_ivt_header(ivt_hdr))
 489                 goto hab_caam_clock_disable;
 490
 491         /* Verify IVT body */
 492         if (ivt->self != ivt_addr) {
 493                 printf("ivt->self 0x%08x pointer is 0x%08x\n",
 494                        ivt->self, ivt_addr);
 495                 goto hab_caam_clock_disable;
 496         }
 497
 498         start = ddr_start;
 499         bytes = image_size;
 500
 501         if (hab_rvt_entry() != HAB_SUCCESS) {
 502                 puts("hab entry function fail\n");
 503                 goto hab_exit_failure_print_status;
 504         }
 505
 506         status = hab_rvt_check_target(HAB_TGT_MEMORY, (void *)ddr_start, bytes);
 507         if (status != HAB_SUCCESS) {
 508                 printf("HAB check target 0x%08x-0x%08x fail\n",
 509                        ddr_start, ddr_start + bytes);
 510                 goto hab_exit_failure_print_status;
 511         }
 512 #ifdef DEBUG
 513         printf("\nivt_offset = 0x%x, ivt addr = 0x%x\n", ivt_offset, ivt_addr);
 514         printf("ivt entry = 0x%08x, dcd = 0x%08x, csf = 0x%08x\n", ivt->entry,
 515                ivt->dcd, ivt->csf);
 516         puts("Dumping IVT\n");
 517         print_buffer(ivt_addr, (void *)(ivt_addr), 4, 0x8, 0);
 518
 519         puts("Dumping CSF Header\n");
 520         print_buffer(ivt->csf, (void *)(ivt->csf), 4, 0x10, 0);
 521
 522 #if  !defined(CONFIG_SPL_BUILD)
 523         get_hab_status();
 524 #endif
 525
 526         puts("\nCalling authenticate_image in ROM\n");
 527         printf("\tivt_offset = 0x%x\n", ivt_offset);
 528         printf("\tstart = 0x%08lx\n", start);
 529         printf("\tbytes = 0x%x\n", bytes);
 530 #endif
 531         /*
 532          * If the MMU is enabled, we have to notify the ROM
 533          * code, or it won't flush the caches when needed.
 534          * This is done, by setting the "pu_irom_mmu_enabled"
 535          * word to 1. You can find its address by looking in
 536          * the ROM map. This is critical for
 537          * authenticate_image(). If MMU is enabled, without
 538          * setting this bit, authentication will fail and may
 539          * crash.
 540          */
 541         /* Check MMU enabled */
 542         if (is_soc_type(MXC_SOC_MX6) && get_cr() & CR_M) {
 543                 if (is_mx6dq()) {
 544                         /*
 545                          * This won't work on Rev 1.0.0 of
 546                          * i.MX6Q/D, since their ROM doesn't
 547                          * do cache flushes. don't think any
 548                          * exist, so we ignore them.
 549                          */
 550                         if (!is_mx6dqp())
 551                                 writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
 552                 } else if (is_mx6sdl()) {
 553                         writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);
 554                 } else if (is_mx6sl()) {
 555                         writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
 556                 }
 557         }
 558
 559         load_addr = (uint32_t)hab_rvt_authenticate_image(
 560                         HAB_CID_UBOOT,
 561                         ivt_offset, (void **)&start,
 562                         (size_t *)&bytes, NULL);
 563         if (hab_rvt_exit() != HAB_SUCCESS) {
 564                 puts("hab exit function fail\n");
 565                 load_addr = 0;
 566         }
 567
 568 hab_exit_failure_print_status:
 569 #if !defined(CONFIG_SPL_BUILD)
 570         get_hab_status();
 571 #endif
 572
 573 hab_caam_clock_disable:
 574         hab_caam_clock_enable(0);
 575
 576         if (load_addr != 0)
 577                 result = 0;
 578
 579         return result;
 580 }