common/image-fdt.c

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