tools/fit_image.c

   1 /*
   2  * (C) Copyright 2008 Semihalf
   3  *
   4  * (C) Copyright 2000-2004
   5  * DENX Software Engineering
   6  * Wolfgang Denk, wd@denx.de
   7  *
   8  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
   9  *              FIT image specific code abstracted from mkimage.c
  10  *              some functions added to address abstraction
  11  *
  12  * All rights reserved.
  13  *
  14  * SPDX-License-Identifier:     GPL-2.0+
  15  */
  16
  17 #include "imagetool.h"
  18 #include "fit_common.h"
  19 #include "mkimage.h"
  20 #include <image.h>
  21 #include <stdarg.h>
  22 #include <version.h>
  23 #include <u-boot/crc.h>
  24
  25 static image_header_t header;
  26
  27 static int fit_add_file_data(struct image_tool_params *params, size_t size_inc,
  28                              const char *tmpfile)
  29 {
  30         int tfd, destfd = 0;
  31         void *dest_blob = NULL;
  32         off_t destfd_size = 0;
  33         struct stat sbuf;
  34         void *ptr;
  35         int ret = 0;
  36
  37         tfd = mmap_fdt(params->cmdname, tmpfile, size_inc, &ptr, &sbuf, true);
  38         if (tfd < 0)
  39                 return -EIO;
  40
  41         if (params->keydest) {
  42                 struct stat dest_sbuf;
  43
  44                 destfd = mmap_fdt(params->cmdname, params->keydest, size_inc,
  45                                   &dest_blob, &dest_sbuf, false);
  46                 if (destfd < 0) {
  47                         ret = -EIO;
  48                         goto err_keydest;
  49                 }
  50                 destfd_size = dest_sbuf.st_size;
  51         }
  52
  53         /* for first image creation, add a timestamp at offset 0 i.e., root  */
  54         if (params->datafile)
  55                 ret = fit_set_timestamp(ptr, 0, sbuf.st_mtime);
  56
  57         if (!ret) {
  58                 ret = fit_add_verification_data(params->keydir, dest_blob, ptr,
  59                                                 params->comment,
  60                                                 params->require_keys);
  61         }
  62
  63         if (dest_blob) {
  64                 munmap(dest_blob, destfd_size);
  65                 close(destfd);
  66         }
  67
  68 err_keydest:
  69         munmap(ptr, sbuf.st_size);
  70         close(tfd);
  71
  72         return ret;
  73 }
  74
  75 /**
  76  * fit_calc_size() - Calculate the approximate size of the FIT we will generate
  77  */
  78 static int fit_calc_size(struct image_tool_params *params)
  79 {
  80         struct content_info *cont;
  81         int size, total_size;
  82
  83         size = imagetool_get_filesize(params, params->datafile);
  84         if (size < 0)
  85                 return -1;
  86
  87         total_size = size;
  88         for (cont = params->content_head; cont; cont = cont->next) {
  89                 size = imagetool_get_filesize(params, cont->fname);
  90                 if (size < 0)
  91                         return -1;
  92
  93                 /* Add space for properties */
  94                 total_size += size + 300;
  95         }
  96
  97         /* Add plenty of space for headers, properties, nodes, etc. */
  98         total_size += 4096;
  99
 100         return total_size;
 101 }
 102
 103 static int fdt_property_file(struct image_tool_params *params,
 104                              void *fdt, const char *name, const char *fname)
 105 {
 106         struct stat sbuf;
 107         void *ptr;
 108         int ret;
 109         int fd;
 110
 111         fd = open(fname, O_RDWR | O_BINARY);
 112         if (fd < 0) {
 113                 fprintf(stderr, "%s: Can't open %s: %s\n",
 114                         params->cmdname, fname, strerror(errno));
 115                 return -1;
 116         }
 117
 118         if (fstat(fd, &sbuf) < 0) {
 119                 fprintf(stderr, "%s: Can't stat %s: %s\n",
 120                         params->cmdname, fname, strerror(errno));
 121                 goto err;
 122         }
 123
 124         ret = fdt_property_placeholder(fdt, "data", sbuf.st_size, &ptr);
 125         if (ret)
 126                 goto err;
 127         ret = read(fd, ptr, sbuf.st_size);
 128         if (ret != sbuf.st_size) {
 129                 fprintf(stderr, "%s: Can't read %s: %s\n",
 130                         params->cmdname, fname, strerror(errno));
 131                 goto err;
 132         }
 133         close(fd);
 134
 135         return 0;
 136 err:
 137         close(fd);
 138         return -1;
 139 }
 140
 141 static int fdt_property_strf(void *fdt, const char *name, const char *fmt, ...)
 142 {
 143         char str[100];
 144         va_list ptr;
 145
 146         va_start(ptr, fmt);
 147         vsnprintf(str, sizeof(str), fmt, ptr);
 148         va_end(ptr);
 149         return fdt_property_string(fdt, name, str);
 150 }
 151
 152 static void get_basename(char *str, int size, const char *fname)
 153 {
 154         const char *p, *start, *end;
 155         int len;
 156
 157         /*
 158          * Use the base name as the 'name' field. So for example:
 159          *
 160          * "arch/arm/dts/sun7i-a20-bananapro.dtb"
 161          * becomes "sun7i-a20-bananapro"
 162          */
 163         p = strrchr(fname, '/');
 164         start = p ? p + 1 : fname;
 165         p = strrchr(fname, '.');
 166         end = p ? p : fname + strlen(fname);
 167         len = end - start;
 168         if (len >= size)
 169                 len = size - 1;
 170         memcpy(str, start, len);
 171         str[len] = '\0';
 172 }
 173
 174 /**
 175  * fit_write_images() - Write out a list of images to the FIT
 176  *
 177  * We always include the main image (params->datafile). If there are device
 178  * tree files, we include an fdt@ node for each of those too.
 179  */
 180 static int fit_write_images(struct image_tool_params *params, char *fdt)
 181 {
 182         struct content_info *cont;
 183         const char *typename;
 184         char str[100];
 185         int upto;
 186         int ret;
 187
 188         fdt_begin_node(fdt, "images");
 189
 190         /* First the main image */
 191         typename = genimg_get_type_short_name(params->fit_image_type);
 192         snprintf(str, sizeof(str), "%s@1", typename);
 193         fdt_begin_node(fdt, str);
 194         fdt_property_string(fdt, "description", params->imagename);
 195         fdt_property_string(fdt, "type", typename);
 196         fdt_property_string(fdt, "arch", genimg_get_arch_name(params->arch));
 197         fdt_property_string(fdt, "os", genimg_get_os_short_name(params->os));
 198         fdt_property_string(fdt, "compression",
 199                             genimg_get_comp_short_name(params->comp));
 200         fdt_property_u32(fdt, "load", params->addr);
 201         fdt_property_u32(fdt, "entry", params->ep);
 202
 203         /*
 204          * Put data last since it is large. SPL may only load the first part
 205          * of the DT, so this way it can access all the above fields.
 206          */
 207         ret = fdt_property_file(params, fdt, "data", params->datafile);
 208         if (ret)
 209                 return ret;
 210         fdt_end_node(fdt);
 211
 212         /* Now the device tree files if available */
 213         upto = 0;
 214         for (cont = params->content_head; cont; cont = cont->next) {
 215                 if (cont->type != IH_TYPE_FLATDT)
 216                         continue;
 217                 snprintf(str, sizeof(str), "%s@%d", FIT_FDT_PROP, ++upto);
 218                 fdt_begin_node(fdt, str);
 219
 220                 get_basename(str, sizeof(str), cont->fname);
 221                 fdt_property_string(fdt, "description", str);
 222                 ret = fdt_property_file(params, fdt, "data", cont->fname);
 223                 if (ret)
 224                         return ret;
 225                 fdt_property_string(fdt, "type", typename);
 226                 fdt_property_string(fdt, "arch",
 227                                     genimg_get_arch_short_name(params->arch));
 228                 fdt_property_string(fdt, "compression",
 229                                     genimg_get_comp_short_name(IH_COMP_NONE));
 230                 fdt_end_node(fdt);
 231         }
 232
 233         fdt_end_node(fdt);
 234
 235         return 0;
 236 }
 237
 238 /**
 239  * fit_write_configs() - Write out a list of configurations to the FIT
 240  *
 241  * If there are device tree files, we include a configuration for each, which
 242  * selects the main image (params->datafile) and its corresponding device
 243  * tree file.
 244  *
 245  * Otherwise we just create a configuration with the main image in it.
 246  */
 247 static void fit_write_configs(struct image_tool_params *params, char *fdt)
 248 {
 249         struct content_info *cont;
 250         const char *typename;
 251         char str[100];
 252         int upto;
 253
 254         fdt_begin_node(fdt, "configurations");
 255         fdt_property_string(fdt, "default", "conf@1");
 256
 257         upto = 0;
 258         for (cont = params->content_head; cont; cont = cont->next) {
 259                 if (cont->type != IH_TYPE_FLATDT)
 260                         continue;
 261                 typename = genimg_get_type_short_name(cont->type);
 262                 snprintf(str, sizeof(str), "conf@%d", ++upto);
 263                 fdt_begin_node(fdt, str);
 264
 265                 get_basename(str, sizeof(str), cont->fname);
 266                 fdt_property_string(fdt, "description", str);
 267
 268                 typename = genimg_get_type_short_name(params->fit_image_type);
 269                 snprintf(str, sizeof(str), "%s@1", typename);
 270                 fdt_property_string(fdt, typename, str);
 271
 272                 snprintf(str, sizeof(str), FIT_FDT_PROP "@%d", upto);
 273                 fdt_property_string(fdt, FIT_FDT_PROP, str);
 274                 fdt_end_node(fdt);
 275         }
 276         if (!upto) {
 277                 fdt_begin_node(fdt, "conf@1");
 278                 typename = genimg_get_type_short_name(params->fit_image_type);
 279                 snprintf(str, sizeof(str), "%s@1", typename);
 280                 fdt_property_string(fdt, typename, str);
 281                 fdt_end_node(fdt);
 282         }
 283
 284         fdt_end_node(fdt);
 285 }
 286
 287 static int fit_build_fdt(struct image_tool_params *params, char *fdt, int size)
 288 {
 289         int ret;
 290
 291         ret = fdt_create(fdt, size);
 292         if (ret)
 293                 return ret;
 294         fdt_finish_reservemap(fdt);
 295         fdt_begin_node(fdt, "");
 296         fdt_property_strf(fdt, "description",
 297                           "%s image with one or more FDT blobs",
 298                           genimg_get_type_name(params->fit_image_type));
 299         fdt_property_strf(fdt, "creator", "U-Boot mkimage %s", PLAIN_VERSION);
 300         fdt_property_u32(fdt, "#address-cells", 1);
 301         ret = fit_write_images(params, fdt);
 302         if (ret)
 303                 return ret;
 304         fit_write_configs(params, fdt);
 305         fdt_end_node(fdt);
 306         ret = fdt_finish(fdt);
 307         if (ret)
 308                 return ret;
 309
 310         return fdt_totalsize(fdt);
 311 }
 312
 313 static int fit_build(struct image_tool_params *params, const char *fname)
 314 {
 315         char *buf;
 316         int size;
 317         int ret;
 318         int fd;
 319
 320         size = fit_calc_size(params);
 321         if (size < 0)
 322                 return -1;
 323         buf = malloc(size);
 324         if (!buf) {
 325                 fprintf(stderr, "%s: Out of memory (%d bytes)\n",
 326                         params->cmdname, size);
 327                 return -1;
 328         }
 329         ret = fit_build_fdt(params, buf, size);
 330         if (ret < 0) {
 331                 fprintf(stderr, "%s: Failed to build FIT image\n",
 332                         params->cmdname);
 333                 goto err_buf;
 334         }
 335         size = ret;
 336         fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
 337         if (fd < 0) {
 338                 fprintf(stderr, "%s: Can't open %s: %s\n",
 339                         params->cmdname, fname, strerror(errno));
 340                 goto err;
 341         }
 342         ret = write(fd, buf, size);
 343         if (ret != size) {
 344                 fprintf(stderr, "%s: Can't write %s: %s\n",
 345                         params->cmdname, fname, strerror(errno));
 346                 close(fd);
 347                 goto err;
 348         }
 349         close(fd);
 350         free(buf);
 351
 352         return 0;
 353 err:
 354         close(fd);
 355 err_buf:
 356         free(buf);
 357         return -1;
 358 }
 359
 360 /**
 361  * fit_extract_data() - Move all data outside the FIT
 362  *
 363  * This takes a normal FIT file and removes all the 'data' properties from it.
 364  * The data is placed in an area after the FIT so that it can be accessed
 365  * using an offset into that area. The 'data' properties turn into
 366  * 'data-offset' properties.
 367  *
 368  * This function cannot cope with FITs with 'data-offset' properties. All
 369  * data must be in 'data' properties on entry.
 370  */
 371 static int fit_extract_data(struct image_tool_params *params, const char *fname)
 372 {
 373         void *buf;
 374         int buf_ptr;
 375         int fit_size, new_size;
 376         int fd;
 377         struct stat sbuf;
 378         void *fdt;
 379         int ret;
 380         int images;
 381         int node;
 382
 383         fd = mmap_fdt(params->cmdname, fname, 0, &fdt, &sbuf, false);
 384         if (fd < 0)
 385                 return -EIO;
 386         fit_size = fdt_totalsize(fdt);
 387
 388         /* Allocate space to hold the image data we will extract */
 389         buf = malloc(fit_size);
 390         if (!buf) {
 391                 ret = -ENOMEM;
 392                 goto err_munmap;
 393         }
 394         buf_ptr = 0;
 395
 396         images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
 397         if (images < 0) {
 398                 debug("%s: Cannot find /images node: %d\n", __func__, images);
 399                 ret = -EINVAL;
 400                 goto err_munmap;
 401         }
 402
 403         for (node = fdt_first_subnode(fdt, images);
 404              node >= 0;
 405              node = fdt_next_subnode(fdt, node)) {
 406                 const char *data;
 407                 int len;
 408
 409                 data = fdt_getprop(fdt, node, "data", &len);
 410                 if (!data)
 411                         continue;
 412                 memcpy(buf + buf_ptr, data, len);
 413                 debug("Extracting data size %x\n", len);
 414
 415                 ret = fdt_delprop(fdt, node, "data");
 416                 if (ret) {
 417                         ret = -EPERM;
 418                         goto err_munmap;
 419                 }
 420                 fdt_setprop_u32(fdt, node, "data-offset", buf_ptr);
 421                 fdt_setprop_u32(fdt, node, "data-size", len);
 422
 423                 buf_ptr += (len + 3) & ~3;
 424         }
 425
 426         /* Pack the FDT and place the data after it */
 427         fdt_pack(fdt);
 428
 429         debug("Size reduced from %x to %x\n", fit_size, fdt_totalsize(fdt));
 430         debug("External data size %x\n", buf_ptr);
 431         new_size = fdt_totalsize(fdt);
 432         new_size = (new_size + 3) & ~3;
 433         munmap(fdt, sbuf.st_size);
 434
 435         if (ftruncate(fd, new_size)) {
 436                 debug("%s: Failed to truncate file: %s\n", __func__,
 437                       strerror(errno));
 438                 ret = -EIO;
 439                 goto err;
 440         }
 441         if (lseek(fd, new_size, SEEK_SET) < 0) {
 442                 debug("%s: Failed to seek to end of file: %s\n", __func__,
 443                       strerror(errno));
 444                 ret = -EIO;
 445                 goto err;
 446         }
 447         if (write(fd, buf, buf_ptr) != buf_ptr) {
 448                 debug("%s: Failed to write external data to file %s\n",
 449                       __func__, strerror(errno));
 450                 ret = -EIO;
 451                 goto err;
 452         }
 453         close(fd);
 454         return 0;
 455
 456 err_munmap:
 457         munmap(fdt, sbuf.st_size);
 458 err:
 459         if (buf)
 460                 free(buf);
 461         close(fd);
 462         return ret;
 463 }
 464
 465 static int fit_import_data(struct image_tool_params *params, const char *fname)
 466 {
 467         void *fdt, *old_fdt;
 468         int fit_size, new_size, size, data_base;
 469         int fd;
 470         struct stat sbuf;
 471         int ret;
 472         int images;
 473         int node;
 474
 475         fd = mmap_fdt(params->cmdname, fname, 0, &old_fdt, &sbuf, false);
 476         if (fd < 0)
 477                 return -EIO;
 478         fit_size = fdt_totalsize(old_fdt);
 479         data_base = (fit_size + 3) & ~3;
 480
 481         /* Allocate space to hold the new FIT */
 482         size = sbuf.st_size + 16384;
 483         fdt = malloc(size);
 484         if (!fdt) {
 485                 fprintf(stderr, "%s: Failed to allocate memory (%d bytes)\n",
 486                         __func__, size);
 487                 ret = -ENOMEM;
 488                 goto err;
 489         }
 490         ret = fdt_open_into(old_fdt, fdt, size);
 491         if (ret) {
 492                 debug("%s: Failed to expand FIT: %s\n", __func__,
 493                       fdt_strerror(errno));
 494                 ret = -EINVAL;
 495                 goto err;
 496         }
 497
 498         images = fdt_path_offset(fdt, FIT_IMAGES_PATH);
 499         if (images < 0) {
 500                 debug("%s: Cannot find /images node: %d\n", __func__, images);
 501                 ret = -EINVAL;
 502                 goto err;
 503         }
 504
 505         for (node = fdt_first_subnode(fdt, images);
 506              node >= 0;
 507              node = fdt_next_subnode(fdt, node)) {
 508                 int buf_ptr;
 509                 int len;
 510
 511                 buf_ptr = fdtdec_get_int(fdt, node, "data-offset", -1);
 512                 len = fdtdec_get_int(fdt, node, "data-size", -1);
 513                 if (buf_ptr == -1 || len == -1)
 514                         continue;
 515                 debug("Importing data size %x\n", len);
 516
 517                 ret = fdt_setprop(fdt, node, "data", fdt + data_base + buf_ptr,
 518                                   len);
 519                 if (ret) {
 520                         debug("%s: Failed to write property: %s\n", __func__,
 521                               fdt_strerror(ret));
 522                         ret = -EINVAL;
 523                         goto err;
 524                 }
 525         }
 526
 527         munmap(old_fdt, sbuf.st_size);
 528         close(fd);
 529
 530         /* Pack the FDT and place the data after it */
 531         fdt_pack(fdt);
 532
 533         new_size = fdt_totalsize(fdt);
 534         debug("Size expanded from %x to %x\n", fit_size, new_size);
 535
 536         fd = open(fname, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0666);
 537         if (fd < 0) {
 538                 fprintf(stderr, "%s: Can't open %s: %s\n",
 539                         params->cmdname, fname, strerror(errno));
 540                 free(fdt);
 541                 return -EIO;
 542         }
 543         if (write(fd, fdt, new_size) != new_size) {
 544                 debug("%s: Failed to write external data to file %s\n",
 545                       __func__, strerror(errno));
 546                 ret = -EIO;
 547                 goto err;
 548         }
 549
 550         ret = 0;
 551
 552 err:
 553         free(fdt);
 554         close(fd);
 555         return ret;
 556 }
 557
 558 /**
 559  * fit_handle_file - main FIT file processing function
 560  *
 561  * fit_handle_file() runs dtc to convert .its to .itb, includes
 562  * binary data, updates timestamp property and calculates hashes.
 563  *
 564  * datafile  - .its file
 565  * imagefile - .itb file
 566  *
 567  * returns:
 568  *     only on success, otherwise calls exit (EXIT_FAILURE);
 569  */
 570 static int fit_handle_file(struct image_tool_params *params)
 571 {
 572         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
 573         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
 574         size_t size_inc;
 575         int ret;
 576
 577         /* Flattened Image Tree (FIT) format  handling */
 578         debug ("FIT format handling\n");
 579
 580         /* call dtc to include binary properties into the tmp file */
 581         if (strlen (params->imagefile) +
 582                 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
 583                 fprintf (stderr, "%s: Image file name (%s) too long, "
 584                                 "can't create tmpfile",
 585                                 params->imagefile, params->cmdname);
 586                 return (EXIT_FAILURE);
 587         }
 588         sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
 589
 590         /* We either compile the source file, or use the existing FIT image */
 591         if (params->auto_its) {
 592                 if (fit_build(params, tmpfile)) {
 593                         fprintf(stderr, "%s: failed to build FIT\n",
 594                                 params->cmdname);
 595                         return EXIT_FAILURE;
 596                 }
 597                 *cmd = '\0';
 598         } else if (params->datafile) {
 599                 /* dtc -I dts -O dtb -p 500 datafile > tmpfile */
 600                 snprintf(cmd, sizeof(cmd), "%s %s %s > %s",
 601                          MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
 602                 debug("Trying to execute \"%s\"\n", cmd);
 603         } else {
 604                 snprintf(cmd, sizeof(cmd), "cp %s %s",
 605                          params->imagefile, tmpfile);
 606         }
 607         if (*cmd && system(cmd) == -1) {
 608                 fprintf (stderr, "%s: system(%s) failed: %s\n",
 609                                 params->cmdname, cmd, strerror(errno));
 610                 goto err_system;
 611         }
 612
 613         /* Move the data so it is internal to the FIT, if needed */
 614         ret = fit_import_data(params, tmpfile);
 615         if (ret)
 616                 goto err_system;
 617
 618         /*
 619          * Set hashes for images in the blob. Unfortunately we may need more
 620          * space in either FDT, so keep trying until we succeed.
 621          *
 622          * Note: this is pretty inefficient for signing, since we must
 623          * calculate the signature every time. It would be better to calculate
 624          * all the data and then store it in a separate step. However, this
 625          * would be considerably more complex to implement. Generally a few
 626          * steps of this loop is enough to sign with several keys.
 627          */
 628         for (size_inc = 0; size_inc < 64 * 1024; size_inc += 1024) {
 629                 ret = fit_add_file_data(params, size_inc, tmpfile);
 630                 if (!ret || ret != -ENOSPC)
 631                         break;
 632         }
 633
 634         if (ret) {
 635                 fprintf(stderr, "%s Can't add hashes to FIT blob\n",
 636                         params->cmdname);
 637                 goto err_system;
 638         }
 639
 640         /* Move the data so it is external to the FIT, if requested */
 641         if (params->external_data) {
 642                 ret = fit_extract_data(params, tmpfile);
 643                 if (ret)
 644                         goto err_system;
 645         }
 646
 647         if (rename (tmpfile, params->imagefile) == -1) {
 648                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 649                                 params->cmdname, tmpfile, params->imagefile,
 650                                 strerror (errno));
 651                 unlink (tmpfile);
 652                 unlink (params->imagefile);
 653                 return EXIT_FAILURE;
 654         }
 655         return EXIT_SUCCESS;
 656
 657 err_system:
 658         unlink(tmpfile);
 659         return -1;
 660 }
 661
 662 /**
 663  * fit_image_extract - extract a FIT component image
 664  * @fit: pointer to the FIT format image header
 665  * @image_noffset: offset of the component image node
 666  * @file_name: name of the file to store the FIT sub-image
 667  *
 668  * returns:
 669  *     zero in case of success or a negative value if fail.
 670  */
 671 static int fit_image_extract(
 672         const void *fit,
 673         int image_noffset,
 674         const char *file_name)
 675 {
 676         const void *file_data;
 677         size_t file_size = 0;
 678
 679         /* get the "data" property of component at offset "image_noffset" */
 680         fit_image_get_data(fit, image_noffset, &file_data, &file_size);
 681
 682         /* save the "file_data" into the file specified by "file_name" */
 683         return imagetool_save_subimage(file_name, (ulong) file_data, file_size);
 684 }
 685
 686 /**
 687  * fit_extract_contents - retrieve a sub-image component from the FIT image
 688  * @ptr: pointer to the FIT format image header
 689  * @params: command line parameters
 690  *
 691  * returns:
 692  *     zero in case of success or a negative value if fail.
 693  */
 694 static int fit_extract_contents(void *ptr, struct image_tool_params *params)
 695 {
 696         int images_noffset;
 697         int noffset;
 698         int ndepth;
 699         const void *fit = ptr;
 700         int count = 0;
 701         const char *p;
 702
 703         /* Indent string is defined in header image.h */
 704         p = IMAGE_INDENT_STRING;
 705
 706         if (!fit_check_format(fit)) {
 707                 printf("Bad FIT image format\n");
 708                 return -1;
 709         }
 710
 711         /* Find images parent node offset */
 712         images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
 713         if (images_noffset < 0) {
 714                 printf("Can't find images parent node '%s' (%s)\n",
 715                        FIT_IMAGES_PATH, fdt_strerror(images_noffset));
 716                 return -1;
 717         }
 718
 719         /* Avoid any overrun */
 720         count = fit_get_subimage_count(fit, images_noffset);
 721         if ((params->pflag < 0) || (count <= params->pflag)) {
 722                 printf("No such component at '%d'\n", params->pflag);
 723                 return -1;
 724         }
 725
 726         /* Process its subnodes, extract the desired component from image */
 727         for (ndepth = 0, count = 0,
 728                 noffset = fdt_next_node(fit, images_noffset, &ndepth);
 729                 (noffset >= 0) && (ndepth > 0);
 730                 noffset = fdt_next_node(fit, noffset, &ndepth)) {
 731                 if (ndepth == 1) {
 732                         /*
 733                          * Direct child node of the images parent node,
 734                          * i.e. component image node.
 735                          */
 736                         if (params->pflag == count) {
 737                                 printf("Extracted:\n%s Image %u (%s)\n", p,
 738                                        count, fit_get_name(fit, noffset, NULL));
 739
 740                                 fit_image_print(fit, noffset, p);
 741
 742                                 return fit_image_extract(fit, noffset,
 743                                                 params->outfile);
 744                         }
 745
 746                         count++;
 747                 }
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int fit_check_params(struct image_tool_params *params)
 754 {
 755         if (params->auto_its)
 756                 return 0;
 757         return  ((params->dflag && (params->fflag || params->lflag)) ||
 758                 (params->fflag && (params->dflag || params->lflag)) ||
 759                 (params->lflag && (params->dflag || params->fflag)));
 760 }
 761
 762 U_BOOT_IMAGE_TYPE(
 763         fitimage,
 764         "FIT Image support",
 765         sizeof(image_header_t),
 766         (void *)&header,
 767         fit_check_params,
 768         fit_verify_header,
 769         fit_print_contents,
 770         NULL,
 771         fit_extract_contents,
 772         fit_check_image_types,
 773         fit_handle_file,
 774         NULL /* FIT images use DTB header */
 775 );