arch/arm/cpu/armv7/mx6/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 <asm/io.h>
   9 #include <asm/system.h>
  10 #include <asm/arch/hab.h>
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/sys_proto.h>
  13
  14 /* -------- start of HAB API updates ------------*/
  15
  16 #define hab_rvt_report_event_p                                  \
  17 (                                                               \
  18         ((is_cpu_type(MXC_CPU_MX6Q) ||                          \
  19           is_cpu_type(MXC_CPU_MX6D)) &&                         \
  20           (soc_rev() >= CHIP_REV_1_5)) ?                        \
  21         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :  \
  22         (is_cpu_type(MXC_CPU_MX6DL) &&                          \
  23          (soc_rev() >= CHIP_REV_1_2)) ?                         \
  24         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT_NEW) :  \
  25         ((hab_rvt_report_event_t *)HAB_RVT_REPORT_EVENT)        \
  26 )
  27
  28 #define hab_rvt_report_status_p                                 \
  29 (                                                               \
  30         ((is_cpu_type(MXC_CPU_MX6Q) ||                          \
  31           is_cpu_type(MXC_CPU_MX6D)) &&                         \
  32           (soc_rev() >= CHIP_REV_1_5)) ?                        \
  33         ((hab_rvt_report_status_t *)HAB_RVT_REPORT_STATUS_NEW) :\
  34         (is_cpu_type(MXC_CPU_MX6DL) &&                          \
  35          (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_cpu_type(MXC_CPU_MX6Q) ||                          \
  43           is_cpu_type(MXC_CPU_MX6D)) &&                         \
  44           (soc_rev() >= CHIP_REV_1_5)) ?                        \
  45         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
  46         (is_cpu_type(MXC_CPU_MX6DL) &&                          \
  47          (soc_rev() >= CHIP_REV_1_2)) ?                         \
  48         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE_NEW) : \
  49         ((hab_rvt_authenticate_image_t *)HAB_RVT_AUTHENTICATE_IMAGE)    \
  50 )
  51
  52 #define hab_rvt_entry_p                                         \
  53 (                                                               \
  54         ((is_cpu_type(MXC_CPU_MX6Q) ||                          \
  55           is_cpu_type(MXC_CPU_MX6D)) &&                         \
  56           (soc_rev() >= CHIP_REV_1_5)) ?                        \
  57         ((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :                \
  58         (is_cpu_type(MXC_CPU_MX6DL) &&                          \
  59          (soc_rev() >= CHIP_REV_1_2)) ?                         \
  60         ((hab_rvt_entry_t *)HAB_RVT_ENTRY_NEW) :                \
  61         ((hab_rvt_entry_t *)HAB_RVT_ENTRY)                      \
  62 )
  63
  64 #define hab_rvt_exit_p                                          \
  65 (                                                               \
  66         ((is_cpu_type(MXC_CPU_MX6Q) ||                          \
  67           is_cpu_type(MXC_CPU_MX6D)) &&                         \
  68           (soc_rev() >= CHIP_REV_1_5)) ?                        \
  69         ((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :                  \
  70         (is_cpu_type(MXC_CPU_MX6DL) &&                          \
  71          (soc_rev() >= CHIP_REV_1_2)) ?                         \
  72         ((hab_rvt_exit_t *)HAB_RVT_EXIT_NEW) :                  \
  73         ((hab_rvt_exit_t *)HAB_RVT_EXIT)                        \
  74 )
  75
  76 #define IVT_SIZE                0x20
  77 #define ALIGN_SIZE              0x1000
  78 #define CSF_PAD_SIZE            0x2000
  79 #define MX6DQ_PU_IROM_MMU_EN_VAR        0x009024a8
  80 #define MX6DLS_PU_IROM_MMU_EN_VAR       0x00901dd0
  81 #define MX6SL_PU_IROM_MMU_EN_VAR        0x00900a18
  82
  83 /*
  84  * +------------+  0x0 (DDR_UIMAGE_START) -
  85  * |   Header   |                          |
  86  * +------------+  0x40                    |
  87  * |            |                          |
  88  * |            |                          |
  89  * |            |                          |
  90  * |            |                          |
  91  * | Image Data |                          |
  92  * .            |                          |
  93  * .            |                           > Stuff to be authenticated ----+
  94  * .            |                          |                                |
  95  * |            |                          |                                |
  96  * |            |                          |                                |
  97  * +------------+                          |                                |
  98  * |            |                          |                                |
  99  * | Fill Data  |                          |                                |
 100  * |            |                          |                                |
 101  * +------------+ Align to ALIGN_SIZE      |                                |
 102  * |    IVT     |                          |                                |
 103  * +------------+ + IVT_SIZE              -                                 |
 104  * |            |                                                           |
 105  * |  CSF DATA  | <---------------------------------------------------------+
 106  * |            |
 107  * +------------+
 108  * |            |
 109  * | Fill Data  |
 110  * |            |
 111  * +------------+ + CSF_PAD_SIZE
 112  */
 113
 114 #define MAX_RECORD_BYTES     (8*1024) /* 4 kbytes */
 115
 116 struct record {
 117         uint8_t  tag;                                           /* Tag */
 118         uint8_t  len[2];                                        /* Length */
 119         uint8_t  par;                                           /* Version */
 120         uint8_t  contents[MAX_RECORD_BYTES];/* Record Data */
 121         bool     any_rec_flag;
 122 };
 123
 124 char *rsn_str[] = {"RSN = HAB_RSN_ANY (0x00)\n",
 125                                    "RSN = HAB_ENG_FAIL (0x30)\n",
 126                                    "RSN = HAB_INV_ADDRESS (0x22)\n",
 127                                    "RSN = HAB_INV_ASSERTION (0x0C)\n",
 128                                    "RSN = HAB_INV_CALL (0x28)\n",
 129                                    "RSN = HAB_INV_CERTIFICATE (0x21)\n",
 130                                    "RSN = HAB_INV_COMMAND (0x06)\n",
 131                                    "RSN = HAB_INV_CSF (0x11)\n",
 132                                    "RSN = HAB_INV_DCD (0x27)\n",
 133                                    "RSN = HAB_INV_INDEX (0x0F)\n",
 134                                    "RSN = HAB_INV_IVT (0x05)\n",
 135                                    "RSN = HAB_INV_KEY (0x1D)\n",
 136                                    "RSN = HAB_INV_RETURN (0x1E)\n",
 137                                    "RSN = HAB_INV_SIGNATURE (0x18)\n",
 138                                    "RSN = HAB_INV_SIZE (0x17)\n",
 139                                    "RSN = HAB_MEM_FAIL (0x2E)\n",
 140                                    "RSN = HAB_OVR_COUNT (0x2B)\n",
 141                                    "RSN = HAB_OVR_STORAGE (0x2D)\n",
 142                                    "RSN = HAB_UNS_ALGORITHM (0x12)\n",
 143                                    "RSN = HAB_UNS_COMMAND (0x03)\n",
 144                                    "RSN = HAB_UNS_ENGINE (0x0A)\n",
 145                                    "RSN = HAB_UNS_ITEM (0x24)\n",
 146                                    "RSN = HAB_UNS_KEY (0x1B)\n",
 147                                    "RSN = HAB_UNS_PROTOCOL (0x14)\n",
 148                                    "RSN = HAB_UNS_STATE (0x09)\n",
 149                                    "RSN = INVALID\n",
 150                                    NULL};
 151
 152 char *sts_str[] = {"STS = HAB_SUCCESS (0xF0)\n",
 153                                    "STS = HAB_FAILURE (0x33)\n",
 154                                    "STS = HAB_WARNING (0x69)\n",
 155                                    "STS = INVALID\n",
 156                                    NULL};
 157
 158 char *eng_str[] = {"ENG = HAB_ENG_ANY (0x00)\n",
 159                                    "ENG = HAB_ENG_SCC (0x03)\n",
 160                                    "ENG = HAB_ENG_RTIC (0x05)\n",
 161                                    "ENG = HAB_ENG_SAHARA (0x06)\n",
 162                                    "ENG = HAB_ENG_CSU (0x0A)\n",
 163                                    "ENG = HAB_ENG_SRTC (0x0C)\n",
 164                                    "ENG = HAB_ENG_DCP (0x1B)\n",
 165                                    "ENG = HAB_ENG_CAAM (0x1D)\n",
 166                                    "ENG = HAB_ENG_SNVS (0x1E)\n",
 167                                    "ENG = HAB_ENG_OCOTP (0x21)\n",
 168                                    "ENG = HAB_ENG_DTCP (0x22)\n",
 169                                    "ENG = HAB_ENG_ROM (0x36)\n",
 170                                    "ENG = HAB_ENG_HDCP (0x24)\n",
 171                                    "ENG = HAB_ENG_RTL (0x77)\n",
 172                                    "ENG = HAB_ENG_SW (0xFF)\n",
 173                                    "ENG = INVALID\n",
 174                                    NULL};
 175
 176 char *ctx_str[] = {"CTX = HAB_CTX_ANY(0x00)\n",
 177                                    "CTX = HAB_CTX_FAB (0xFF)\n",
 178                                    "CTX = HAB_CTX_ENTRY (0xE1)\n",
 179                                    "CTX = HAB_CTX_TARGET (0x33)\n",
 180                                    "CTX = HAB_CTX_AUTHENTICATE (0x0A)\n",
 181                                    "CTX = HAB_CTX_DCD (0xDD)\n",
 182                                    "CTX = HAB_CTX_CSF (0xCF)\n",
 183                                    "CTX = HAB_CTX_COMMAND (0xC0)\n",
 184                                    "CTX = HAB_CTX_AUT_DAT (0xDB)\n",
 185                                    "CTX = HAB_CTX_ASSERT (0xA0)\n",
 186                                    "CTX = HAB_CTX_EXIT (0xEE)\n",
 187                                    "CTX = INVALID\n",
 188                                    NULL};
 189
 190 uint8_t hab_statuses[5] = {
 191         HAB_STS_ANY,
 192         HAB_FAILURE,
 193         HAB_WARNING,
 194         HAB_SUCCESS,
 195         -1
 196 };
 197
 198 uint8_t hab_reasons[26] = {
 199         HAB_RSN_ANY,
 200         HAB_ENG_FAIL,
 201         HAB_INV_ADDRESS,
 202         HAB_INV_ASSERTION,
 203         HAB_INV_CALL,
 204         HAB_INV_CERTIFICATE,
 205         HAB_INV_COMMAND,
 206         HAB_INV_CSF,
 207         HAB_INV_DCD,
 208         HAB_INV_INDEX,
 209         HAB_INV_IVT,
 210         HAB_INV_KEY,
 211         HAB_INV_RETURN,
 212         HAB_INV_SIGNATURE,
 213         HAB_INV_SIZE,
 214         HAB_MEM_FAIL,
 215         HAB_OVR_COUNT,
 216         HAB_OVR_STORAGE,
 217         HAB_UNS_ALGORITHM,
 218         HAB_UNS_COMMAND,
 219         HAB_UNS_ENGINE,
 220         HAB_UNS_ITEM,
 221         HAB_UNS_KEY,
 222         HAB_UNS_PROTOCOL,
 223         HAB_UNS_STATE,
 224         -1
 225 };
 226
 227 uint8_t hab_contexts[12] = {
 228         HAB_CTX_ANY,
 229         HAB_CTX_FAB,
 230         HAB_CTX_ENTRY,
 231         HAB_CTX_TARGET,
 232         HAB_CTX_AUTHENTICATE,
 233         HAB_CTX_DCD,
 234         HAB_CTX_CSF,
 235         HAB_CTX_COMMAND,
 236         HAB_CTX_AUT_DAT,
 237         HAB_CTX_ASSERT,
 238         HAB_CTX_EXIT,
 239         -1
 240 };
 241
 242 uint8_t hab_engines[16] = {
 243         HAB_ENG_ANY,
 244         HAB_ENG_SCC,
 245         HAB_ENG_RTIC,
 246         HAB_ENG_SAHARA,
 247         HAB_ENG_CSU,
 248         HAB_ENG_SRTC,
 249         HAB_ENG_DCP,
 250         HAB_ENG_CAAM,
 251         HAB_ENG_SNVS,
 252         HAB_ENG_OCOTP,
 253         HAB_ENG_DTCP,
 254         HAB_ENG_ROM,
 255         HAB_ENG_HDCP,
 256         HAB_ENG_RTL,
 257         HAB_ENG_SW,
 258         -1
 259 };
 260
 261 bool is_hab_enabled(void)
 262 {
 263         struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
 264         struct fuse_bank *bank = &ocotp->bank[0];
 265         struct fuse_bank0_regs *fuse =
 266                 (struct fuse_bank0_regs *)bank->fuse_regs;
 267         uint32_t reg = readl(&fuse->cfg5);
 268
 269         return (reg & 0x2) == 0x2;
 270 }
 271
 272 static inline uint8_t get_idx(uint8_t *list, uint8_t tgt)
 273 {
 274         uint8_t idx = 0;
 275         uint8_t element = list[idx];
 276         while (element != -1) {
 277                 if (element == tgt)
 278                         return idx;
 279                 element = list[++idx];
 280         }
 281         return -1;
 282 }
 283
 284 void process_event_record(uint8_t *event_data, size_t bytes)
 285 {
 286         struct record *rec = (struct record *)event_data;
 287
 288         printf("\n\n%s", sts_str[get_idx(hab_statuses, rec->contents[0])]);
 289         printf("%s", rsn_str[get_idx(hab_reasons, rec->contents[1])]);
 290         printf("%s", ctx_str[get_idx(hab_contexts, rec->contents[2])]);
 291         printf("%s", eng_str[get_idx(hab_engines, rec->contents[3])]);
 292 }
 293
 294 void display_event(uint8_t *event_data, size_t bytes)
 295 {
 296         uint32_t i;
 297
 298         if (!(event_data && bytes > 0))
 299                 return;
 300
 301         for (i = 0; i < bytes; i++) {
 302                 if (i == 0)
 303                         printf("\t0x%02x", event_data[i]);
 304                 else if ((i % 8) == 0)
 305                         printf("\n\t0x%02x", event_data[i]);
 306                 else
 307                         printf(" 0x%02x", event_data[i]);
 308         }
 309
 310         process_event_record(event_data, bytes);
 311 }
 312
 313 int get_hab_status(void)
 314 {
 315         uint32_t index = 0; /* Loop index */
 316         uint8_t event_data[128]; /* Event data buffer */
 317         size_t bytes = sizeof(event_data); /* Event size in bytes */
 318         enum hab_config config = 0;
 319         enum hab_state state = 0;
 320         hab_rvt_report_event_t *hab_rvt_report_event;
 321         hab_rvt_report_status_t *hab_rvt_report_status;
 322
 323         hab_rvt_report_event = hab_rvt_report_event_p;
 324         hab_rvt_report_status = hab_rvt_report_status_p;
 325
 326         if (is_hab_enabled())
 327                 puts("\nSecure boot enabled\n");
 328         else
 329                 puts("\nSecure boot disabled\n");
 330
 331         /* Check HAB status */
 332         if (hab_rvt_report_status(&config, &state) != HAB_SUCCESS) {
 333                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
 334                        config, state);
 335
 336                 /* Display HAB Error events */
 337                 while (hab_rvt_report_event(HAB_FAILURE, index, event_data,
 338                                         &bytes) == HAB_SUCCESS) {
 339                         puts("\n");
 340                         printf("--------- HAB Event %d -----------------\n",
 341                                index + 1);
 342                         puts("event data:\n");
 343                         display_event(event_data, bytes);
 344                         puts("\n");
 345                         bytes = sizeof(event_data);
 346                         index++;
 347                 }
 348         }
 349         /* Display message if no HAB events are found */
 350         else {
 351                 printf("\nHAB Configuration: 0x%02x, HAB State: 0x%02x\n",
 352                        config, state);
 353                 puts("No HAB Events Found!\n\n");
 354         }
 355         return 0;
 356 }
 357
 358 uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size)
 359 {
 360         uint32_t load_addr = 0;
 361         size_t bytes;
 362         ptrdiff_t ivt_offset = 0;
 363         int result = 0;
 364         ulong start;
 365         hab_rvt_authenticate_image_t *hab_rvt_authenticate_image;
 366         hab_rvt_entry_t *hab_rvt_entry;
 367         hab_rvt_exit_t *hab_rvt_exit;
 368
 369         hab_rvt_authenticate_image = hab_rvt_authenticate_image_p;
 370         hab_rvt_entry = hab_rvt_entry_p;
 371         hab_rvt_exit = hab_rvt_exit_p;
 372
 373         if (is_hab_enabled()) {
 374                 printf("\nAuthenticate image from DDR location 0x%x...\n",
 375                        ddr_start);
 376
 377                 hab_caam_clock_enable(1);
 378
 379                 if (hab_rvt_entry() == HAB_SUCCESS) {
 380                         /* If not already aligned, Align to ALIGN_SIZE */
 381                         ivt_offset = (image_size + ALIGN_SIZE - 1) &
 382                                         ~(ALIGN_SIZE - 1);
 383
 384                         start = ddr_start;
 385                         bytes = ivt_offset + IVT_SIZE + CSF_PAD_SIZE;
 386 #ifdef DEBUG
 387                         printf("\nivt_offset = 0x%x, ivt addr = 0x%x\n",
 388                                ivt_offset, ddr_start + ivt_offset);
 389                         puts("Dumping IVT\n");
 390                         print_buffer(ddr_start + ivt_offset,
 391                                      (void *)(ddr_start + ivt_offset),
 392                                      4, 0x8, 0);
 393
 394                         puts("Dumping CSF Header\n");
 395                         print_buffer(ddr_start + ivt_offset+IVT_SIZE,
 396                                      (void *)(ddr_start + ivt_offset+IVT_SIZE),
 397                                      4, 0x10, 0);
 398
 399                         get_hab_status();
 400
 401                         puts("\nCalling authenticate_image in ROM\n");
 402                         printf("\tivt_offset = 0x%x\n", ivt_offset);
 403                         printf("\tstart = 0x%08lx\n", start);
 404                         printf("\tbytes = 0x%x\n", bytes);
 405 #endif
 406                         /*
 407                          * If the MMU is enabled, we have to notify the ROM
 408                          * code, or it won't flush the caches when needed.
 409                          * This is done, by setting the "pu_irom_mmu_enabled"
 410                          * word to 1. You can find its address by looking in
 411                          * the ROM map. This is critical for
 412                          * authenticate_image(). If MMU is enabled, without
 413                          * setting this bit, authentication will fail and may
 414                          * crash.
 415                          */
 416                         /* Check MMU enabled */
 417                         if (get_cr() & CR_M) {
 418                                 if (is_cpu_type(MXC_CPU_MX6Q) ||
 419                                     is_cpu_type(MXC_CPU_MX6D)) {
 420                                         /*
 421                                          * This won't work on Rev 1.0.0 of
 422                                          * i.MX6Q/D, since their ROM doesn't
 423                                          * do cache flushes. don't think any
 424                                          * exist, so we ignore them.
 425                                          */
 426                                         writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
 427                                 } else if (is_cpu_type(MXC_CPU_MX6DL) ||
 428                                            is_cpu_type(MXC_CPU_MX6SOLO)) {
 429                                         writel(1, MX6DLS_PU_IROM_MMU_EN_VAR);
 430                                 } else if (is_cpu_type(MXC_CPU_MX6SL)) {
 431                                         writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
 432                                 }
 433                         }
 434
 435                         load_addr = (uint32_t)hab_rvt_authenticate_image(
 436                                         HAB_CID_UBOOT,
 437                                         ivt_offset, (void **)&start,
 438                                         (size_t *)&bytes, NULL);
 439                         if (hab_rvt_exit() != HAB_SUCCESS) {
 440                                 puts("hab exit function fail\n");
 441                                 load_addr = 0;
 442                         }
 443                 } else {
 444                         puts("hab entry function fail\n");
 445                 }
 446
 447                 hab_caam_clock_enable(0);
 448
 449                 get_hab_status();
 450         } else {
 451                 puts("hab fuse not enabled\n");
 452         }
 453
 454         if ((!is_hab_enabled()) || (load_addr != 0))
 455                 result = 1;
 456
 457         return result;
 458 }
 459
 460 int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 461 {
 462         if ((argc != 1)) {
 463                 cmd_usage(cmdtp);
 464                 return 1;
 465         }
 466
 467         get_hab_status();
 468
 469         return 0;
 470 }
 471
 472 static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc,
 473                                 char * const argv[])
 474 {
 475         ulong   addr, ivt_offset;
 476         int     rcode = 0;
 477
 478         if (argc < 3)
 479                 return CMD_RET_USAGE;
 480
 481         addr = simple_strtoul(argv[1], NULL, 16);
 482         ivt_offset = simple_strtoul(argv[2], NULL, 16);
 483
 484         rcode = authenticate_image(addr, ivt_offset);
 485
 486         return rcode;
 487 }
 488
 489 U_BOOT_CMD(
 490                 hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
 491                 "display HAB status",
 492                 ""
 493           );
 494
 495 U_BOOT_CMD(
 496                 hab_auth_img, 3, 0, do_authenticate_image,
 497                 "authenticate image via HAB",
 498                 "addr ivt_offset\n"
 499                 "addr - image hex address\n"
 500                 "ivt_offset - hex offset of IVT in the image"
 501           );