common/image-fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2013, Google Inc.
   4  *
   5  * (C) Copyright 2008 Semihalf
   6  *
   7  * (C) Copyright 2000-2006
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  */
  10
  11 #include <common.h>
  12 #include <fdt_support.h>
  13 #include <fdtdec.h>
  14 #include <env.h>
  15 #include <errno.h>
  16 #include <image.h>
  17 #include <linux/libfdt.h>
  18 #include <mapmem.h>
  19 #include <asm/io.h>
  20 #include <tee/optee.h>
  21
  22 #ifndef CONFIG_SYS_FDT_PAD
  23 #define CONFIG_SYS_FDT_PAD 0x3000
  24 #endif
  25
  26 /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
  27 #define FDT_RAMDISK_OVERHEAD    0x80
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 static void fdt_error(const char *msg)
  32 {
  33         puts("ERROR: ");
  34         puts(msg);
  35         puts(" - must RESET the board to recover.\n");
  36 }
  37
  38 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
  39 static const image_header_t *image_get_fdt(ulong fdt_addr)
  40 {
  41         const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
  42
  43         image_print_contents(fdt_hdr);
  44
  45         puts("   Verifying Checksum ... ");
  46         if (!image_check_hcrc(fdt_hdr)) {
  47                 fdt_error("fdt header checksum invalid");
  48                 return NULL;
  49         }
  50
  51         if (!image_check_dcrc(fdt_hdr)) {
  52                 fdt_error("fdt checksum invalid");
  53                 return NULL;
  54         }
  55         puts("OK\n");
  56
  57         if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
  58                 fdt_error("uImage is not a fdt");
  59                 return NULL;
  60         }
  61         if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
  62                 fdt_error("uImage is compressed");
  63                 return NULL;
  64         }
  65         if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
  66                 fdt_error("uImage data is not a fdt");
  67                 return NULL;
  68         }
  69         return fdt_hdr;
  70 }
  71 #endif
  72
  73 static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr,
  74                                     uint64_t size)
  75 {
  76         long ret;
  77
  78         ret = lmb_reserve(lmb, addr, size);
  79         if (ret >= 0) {
  80                 debug("   reserving fdt memory region: addr=%llx size=%llx\n",
  81                       (unsigned long long)addr, (unsigned long long)size);
  82         } else {
  83                 puts("ERROR: reserving fdt memory region failed ");
  84                 printf("(addr=%llx size=%llx)\n",
  85                        (unsigned long long)addr, (unsigned long long)size);
  86         }
  87 }
  88
  89 /**
  90  * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
  91  * sections as unusable
  92  * @lmb: pointer to lmb handle, will be used for memory mgmt
  93  * @fdt_blob: pointer to fdt blob base address
  94  *
  95  * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
  96  * Adding the memreserve regions prevents u-boot from using them to store the
  97  * initrd or the fdt blob.
  98  */
  99 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
 100 {
 101         uint64_t addr, size;
 102         int i, total, ret;
 103         int nodeoffset, subnode;
 104         struct fdt_resource res;
 105
 106         if (fdt_check_header(fdt_blob) != 0)
 107                 return;
 108
 109         /* process memreserve sections */
 110         total = fdt_num_mem_rsv(fdt_blob);
 111         for (i = 0; i < total; i++) {
 112                 if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
 113                         continue;
 114                 boot_fdt_reserve_region(lmb, addr, size);
 115         }
 116
 117         /* process reserved-memory */
 118         nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory");
 119         if (nodeoffset >= 0) {
 120                 subnode = fdt_first_subnode(fdt_blob, nodeoffset);
 121                 while (subnode >= 0) {
 122                         /* check if this subnode has a reg property */
 123                         ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
 124                                                &res);
 125                         if (!ret) {
 126                                 addr = res.start;
 127                                 size = res.end - res.start + 1;
 128                                 boot_fdt_reserve_region(lmb, addr, size);
 129                         }
 130
 131                         subnode = fdt_next_subnode(fdt_blob, subnode);
 132                 }
 133         }
 134 }
 135
 136 /**
 137  * boot_relocate_fdt - relocate flat device tree
 138  * @lmb: pointer to lmb handle, will be used for memory mgmt
 139  * @of_flat_tree: pointer to a char* variable, will hold fdt start address
 140  * @of_size: pointer to a ulong variable, will hold fdt length
 141  *
 142  * boot_relocate_fdt() allocates a region of memory within the bootmap and
 143  * relocates the of_flat_tree into that region, even if the fdt is already in
 144  * the bootmap.  It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
 145  * bytes.
 146  *
 147  * of_flat_tree and of_size are set to final (after relocation) values
 148  *
 149  * returns:
 150  *      0 - success
 151  *      1 - failure
 152  */
 153 int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
 154 {
 155         void    *fdt_blob = *of_flat_tree;
 156         void    *of_start = NULL;
 157         char    *fdt_high;
 158         ulong   of_len = 0;
 159         int     err;
 160         int     disable_relocation = 0;
 161
 162         /* nothing to do */
 163         if (*of_size == 0)
 164                 return 0;
 165
 166         if (fdt_check_header(fdt_blob) != 0) {
 167                 fdt_error("image is not a fdt");
 168                 goto error;
 169         }
 170
 171         /* position on a 4K boundary before the alloc_current */
 172         /* Pad the FDT by a specified amount */
 173         of_len = *of_size + CONFIG_SYS_FDT_PAD;
 174
 175         /* If fdt_high is set use it to select the relocation address */
 176         fdt_high = env_get("fdt_high");
 177         if (fdt_high) {
 178                 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);
 179
 180                 if (((ulong) desired_addr) == ~0UL) {
 181                         /* All ones means use fdt in place */
 182                         of_start = fdt_blob;
 183                         lmb_reserve(lmb, (ulong)of_start, of_len);
 184                         disable_relocation = 1;
 185                 } else if (desired_addr) {
 186                         of_start =
 187                             (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
 188                                                            (ulong)desired_addr);
 189                         if (of_start == NULL) {
 190                                 puts("Failed using fdt_high value for Device Tree");
 191                                 goto error;
 192                         }
 193                 } else {
 194                         of_start =
 195                             (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
 196                 }
 197         } else {
 198                 of_start =
 199                     (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
 200                                                    env_get_bootm_mapsize()
 201                                                    + env_get_bootm_low());
 202         }
 203
 204         if (of_start == NULL) {
 205                 puts("device tree - allocation error\n");
 206                 goto error;
 207         }
 208
 209         if (disable_relocation) {
 210                 /*
 211                  * We assume there is space after the existing fdt to use
 212                  * for padding
 213                  */
 214                 fdt_set_totalsize(of_start, of_len);
 215                 printf("   Using Device Tree in place at %p, end %p\n",
 216                        of_start, of_start + of_len - 1);
 217         } else {
 218                 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
 219                       fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
 220
 221                 printf("   Loading Device Tree to %p, end %p ... ",
 222                        of_start, of_start + of_len - 1);
 223
 224                 err = fdt_open_into(fdt_blob, of_start, of_len);
 225                 if (err != 0) {
 226                         fdt_error("fdt move failed");
 227                         goto error;
 228                 }
 229                 puts("OK\n");
 230         }
 231
 232         *of_flat_tree = of_start;
 233         *of_size = of_len;
 234
 235         if (CONFIG_IS_ENABLED(CMD_FDT))
 236                 set_working_fdt_addr(map_to_sysmem(*of_flat_tree));
 237         return 0;
 238
 239 error:
 240         return 1;
 241 }
 242
 243 /**
 244  * boot_get_fdt - main fdt handling routine
 245  * @argc: command argument count
 246  * @argv: command argument list
 247  * @arch: architecture (IH_ARCH_...)
 248  * @images: pointer to the bootm images structure
 249  * @of_flat_tree: pointer to a char* variable, will hold fdt start address
 250  * @of_size: pointer to a ulong variable, will hold fdt length
 251  *
 252  * boot_get_fdt() is responsible for finding a valid flat device tree image.
 253  * Curently supported are the following ramdisk sources:
 254  *      - multicomponent kernel/ramdisk image,
 255  *      - commandline provided address of decicated ramdisk image.
 256  *
 257  * returns:
 258  *     0, if fdt image was found and valid, or skipped
 259  *     of_flat_tree and of_size are set to fdt start address and length if
 260  *     fdt image is found and valid
 261  *
 262  *     1, if fdt image is found but corrupted
 263  *     of_flat_tree and of_size are set to 0 if no fdt exists
 264  */
 265 int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
 266                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
 267 {
 268 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 269         const image_header_t *fdt_hdr;
 270         ulong           load, load_end;
 271         ulong           image_start, image_data, image_end;
 272 #endif
 273         ulong           img_addr;
 274         ulong           fdt_addr;
 275         char            *fdt_blob = NULL;
 276         void            *buf;
 277 #if CONFIG_IS_ENABLED(FIT)
 278         const char      *fit_uname_config = images->fit_uname_cfg;
 279         const char      *fit_uname_fdt = NULL;
 280         ulong           default_addr;
 281         int             fdt_noffset;
 282 #endif
 283         const char *select = NULL;
 284
 285         *of_flat_tree = NULL;
 286         *of_size = 0;
 287
 288         img_addr = (argc == 0) ? image_load_addr :
 289                         simple_strtoul(argv[0], NULL, 16);
 290         buf = map_sysmem(img_addr, 0);
 291
 292         if (argc > 2)
 293                 select = argv[2];
 294         if (select || genimg_has_config(images)) {
 295 #if CONFIG_IS_ENABLED(FIT)
 296                 if (select) {
 297                         /*
 298                          * If the FDT blob comes from the FIT image and the
 299                          * FIT image address is omitted in the command line
 300                          * argument, try to use ramdisk or os FIT image
 301                          * address or default load address.
 302                          */
 303                         if (images->fit_uname_rd)
 304                                 default_addr = (ulong)images->fit_hdr_rd;
 305                         else if (images->fit_uname_os)
 306                                 default_addr = (ulong)images->fit_hdr_os;
 307                         else
 308                                 default_addr = image_load_addr;
 309
 310                         if (fit_parse_conf(select, default_addr,
 311                                            &fdt_addr, &fit_uname_config)) {
 312                                 debug("*  fdt: config '%s' from image at 0x%08lx\n",
 313                                       fit_uname_config, fdt_addr);
 314                         } else if (fit_parse_subimage(select, default_addr,
 315                                    &fdt_addr, &fit_uname_fdt)) {
 316                                 debug("*  fdt: subimage '%s' from image at 0x%08lx\n",
 317                                       fit_uname_fdt, fdt_addr);
 318                         } else
 319 #endif
 320                         {
 321                                 fdt_addr = simple_strtoul(select, NULL, 16);
 322                                 debug("*  fdt: cmdline image address = 0x%08lx\n",
 323                                       fdt_addr);
 324                         }
 325 #if CONFIG_IS_ENABLED(FIT)
 326                 } else {
 327                         /* use FIT configuration provided in first bootm
 328                          * command argument
 329                          */
 330                         fdt_addr = map_to_sysmem(images->fit_hdr_os);
 331                         fdt_noffset = fit_get_node_from_config(images,
 332                                                                FIT_FDT_PROP,
 333                                                                fdt_addr);
 334                         if (fdt_noffset == -ENOENT)
 335                                 return 0;
 336                         else if (fdt_noffset < 0)
 337                                 return 1;
 338                 }
 339 #endif
 340                 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
 341                       fdt_addr);
 342
 343                 /*
 344                  * Check if there is an FDT image at the
 345                  * address provided in the second bootm argument
 346                  * check image type, for FIT images get a FIT node.
 347                  */
 348                 buf = map_sysmem(fdt_addr, 0);
 349                 switch (genimg_get_format(buf)) {
 350 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 351                 case IMAGE_FORMAT_LEGACY:
 352                         /* verify fdt_addr points to a valid image header */
 353                         printf("## Flattened Device Tree from Legacy Image at %08lx\n",
 354                                fdt_addr);
 355                         fdt_hdr = image_get_fdt(fdt_addr);
 356                         if (!fdt_hdr)
 357                                 goto no_fdt;
 358
 359                         /*
 360                          * move image data to the load address,
 361                          * make sure we don't overwrite initial image
 362                          */
 363                         image_start = (ulong)fdt_hdr;
 364                         image_data = (ulong)image_get_data(fdt_hdr);
 365                         image_end = image_get_image_end(fdt_hdr);
 366
 367                         load = image_get_load(fdt_hdr);
 368                         load_end = load + image_get_data_size(fdt_hdr);
 369
 370                         if (load == image_start ||
 371                             load == image_data) {
 372                                 fdt_addr = load;
 373                                 break;
 374                         }
 375
 376                         if ((load < image_end) && (load_end > image_start)) {
 377                                 fdt_error("fdt overwritten");
 378                                 goto error;
 379                         }
 380
 381                         debug("   Loading FDT from 0x%08lx to 0x%08lx\n",
 382                               image_data, load);
 383
 384                         memmove((void *)load,
 385                                 (void *)image_data,
 386                                 image_get_data_size(fdt_hdr));
 387
 388                         fdt_addr = load;
 389                         break;
 390 #endif
 391                 case IMAGE_FORMAT_FIT:
 392                         /*
 393                          * This case will catch both: new uImage format
 394                          * (libfdt based) and raw FDT blob (also libfdt
 395                          * based).
 396                          */
 397 #if CONFIG_IS_ENABLED(FIT)
 398                         /* check FDT blob vs FIT blob */
 399                         if (fit_check_format(buf)) {
 400                                 ulong load, len;
 401
 402                                 fdt_noffset = boot_get_fdt_fit(images,
 403                                         fdt_addr, &fit_uname_fdt,
 404                                         &fit_uname_config,
 405                                         arch, &load, &len);
 406
 407                                 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
 408                                 images->fit_uname_fdt = fit_uname_fdt;
 409                                 images->fit_noffset_fdt = fdt_noffset;
 410                                 fdt_addr = load;
 411
 412                                 break;
 413                         } else
 414 #endif
 415                         {
 416                                 /*
 417                                  * FDT blob
 418                                  */
 419                                 debug("*  fdt: raw FDT blob\n");
 420                                 printf("## Flattened Device Tree blob at %08lx\n",
 421                                        (long)fdt_addr);
 422                         }
 423                         break;
 424                 default:
 425                         puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
 426                         goto no_fdt;
 427                 }
 428
 429                 printf("   Booting using the fdt blob at %#08lx\n", fdt_addr);
 430                 fdt_blob = map_sysmem(fdt_addr, 0);
 431         } else if (images->legacy_hdr_valid &&
 432                         image_check_type(&images->legacy_hdr_os_copy,
 433                                          IH_TYPE_MULTI)) {
 434                 ulong fdt_data, fdt_len;
 435
 436                 /*
 437                  * Now check if we have a legacy multi-component image,
 438                  * get second entry data start address and len.
 439                  */
 440                 printf("## Flattened Device Tree from multi component Image at %08lX\n",
 441                        (ulong)images->legacy_hdr_os);
 442
 443                 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
 444                                    &fdt_len);
 445                 if (fdt_len) {
 446                         fdt_blob = (char *)fdt_data;
 447                         printf("   Booting using the fdt at 0x%p\n", fdt_blob);
 448
 449                         if (fdt_check_header(fdt_blob) != 0) {
 450                                 fdt_error("image is not a fdt");
 451                                 goto error;
 452                         }
 453
 454                         if (fdt_totalsize(fdt_blob) != fdt_len) {
 455                                 fdt_error("fdt size != image size");
 456                                 goto error;
 457                         }
 458                 } else {
 459                         debug("## No Flattened Device Tree\n");
 460                         goto no_fdt;
 461                 }
 462 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 463         } else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
 464                 struct andr_img_hdr *hdr = buf;
 465                 ulong fdt_data, fdt_len;
 466
 467                 if (!android_image_get_second(hdr, &fdt_data, &fdt_len) &&
 468                     !fdt_check_header((char *)fdt_data)) {
 469                         fdt_blob = (char *)fdt_data;
 470                         if (fdt_totalsize(fdt_blob) != fdt_len)
 471                                 goto error;
 472
 473                         debug("## Using FDT in Android image second area\n");
 474                 } else {
 475                         fdt_addr = env_get_hex("fdtaddr", 0);
 476                         if (!fdt_addr)
 477                                 goto no_fdt;
 478
 479                         fdt_blob = map_sysmem(fdt_addr, 0);
 480                         if (fdt_check_header(fdt_blob))
 481                                 goto no_fdt;
 482
 483                         debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
 484                 }
 485 #endif
 486         } else {
 487                 debug("## No Flattened Device Tree\n");
 488                 goto no_fdt;
 489         }
 490
 491         *of_flat_tree = fdt_blob;
 492         *of_size = fdt_totalsize(fdt_blob);
 493         debug("   of_flat_tree at 0x%08lx size 0x%08lx\n",
 494               (ulong)*of_flat_tree, *of_size);
 495
 496         return 0;
 497
 498 no_fdt:
 499         debug("Continuing to boot without FDT\n");
 500         return 0;
 501 error:
 502         return 1;
 503 }
 504
 505 /*
 506  * Verify the device tree.
 507  *
 508  * This function is called after all device tree fix-ups have been enacted,
 509  * so that the final device tree can be verified.  The definition of "verified"
 510  * is up to the specific implementation.  However, it generally means that the
 511  * addresses of some of the devices in the device tree are compared with the
 512  * actual addresses at which U-Boot has placed them.
 513  *
 514  * Returns 1 on success, 0 on failure.  If 0 is returned, U-Boot will halt the
 515  * boot process.
 516  */
 517 __weak int ft_verify_fdt(void *fdt)
 518 {
 519         return 1;
 520 }
 521
 522 __weak int arch_fixup_fdt(void *blob)
 523 {
 524         return 0;
 525 }
 526
 527 int image_setup_libfdt(bootm_headers_t *images, void *blob,
 528                        int of_size, struct lmb *lmb)
 529 {
 530         ulong *initrd_start = &images->initrd_start;
 531         ulong *initrd_end = &images->initrd_end;
 532         int ret = -EPERM;
 533         int fdt_ret;
 534
 535         if (fdt_root(blob) < 0) {
 536                 printf("ERROR: root node setup failed\n");
 537                 goto err;
 538         }
 539         if (fdt_chosen(blob) < 0) {
 540                 printf("ERROR: /chosen node create failed\n");
 541                 goto err;
 542         }
 543         if (arch_fixup_fdt(blob) < 0) {
 544                 printf("ERROR: arch-specific fdt fixup failed\n");
 545                 goto err;
 546         }
 547         /* Update ethernet nodes */
 548         fdt_fixup_ethernet(blob);
 549         if (IMAGE_OF_BOARD_SETUP) {
 550                 fdt_ret = ft_board_setup(blob, gd->bd);
 551                 if (fdt_ret) {
 552                         printf("ERROR: board-specific fdt fixup failed: %s\n",
 553                                fdt_strerror(fdt_ret));
 554                         goto err;
 555                 }
 556         }
 557         if (IMAGE_OF_SYSTEM_SETUP) {
 558                 fdt_ret = ft_system_setup(blob, gd->bd);
 559                 if (fdt_ret) {
 560                         printf("ERROR: system-specific fdt fixup failed: %s\n",
 561                                fdt_strerror(fdt_ret));
 562                         goto err;
 563                 }
 564         }
 565
 566         fdt_ret = optee_copy_fdt_nodes(gd->fdt_blob, blob);
 567         if (fdt_ret) {
 568                 printf("ERROR: transfer of optee nodes to new fdt failed: %s\n",
 569                        fdt_strerror(fdt_ret));
 570                 goto err;
 571         }
 572
 573         /* Delete the old LMB reservation */
 574         if (lmb)
 575                 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
 576                          (phys_size_t)fdt_totalsize(blob));
 577
 578         ret = fdt_shrink_to_minimum(blob, 0);
 579         if (ret < 0)
 580                 goto err;
 581         of_size = ret;
 582
 583         if (*initrd_start && *initrd_end) {
 584                 of_size += FDT_RAMDISK_OVERHEAD;
 585                 fdt_set_totalsize(blob, of_size);
 586         }
 587         /* Create a new LMB reservation */
 588         if (lmb)
 589                 lmb_reserve(lmb, (ulong)blob, of_size);
 590
 591         fdt_initrd(blob, *initrd_start, *initrd_end);
 592         if (!ft_verify_fdt(blob))
 593                 goto err;
 594
 595 #if defined(CONFIG_SOC_KEYSTONE)
 596         if (IMAGE_OF_BOARD_SETUP)
 597                 ft_board_setup_ex(blob, gd->bd);
 598 #endif
 599
 600         return 0;
 601 err:
 602         printf(" - must RESET the board to recover.\n\n");
 603
 604         return ret;
 605 }