tools/firmware-utils/src/imagetag.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Axel Gembe <ago@bastart.eu.org>
   7  * Copyright (C) 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <stdint.h>
  14 #include <time.h>
  15 #include <unistd.h>
  16 #include <sys/stat.h>
  17 #include <netinet/in.h>
  18 #include <inttypes.h>
  19
  20 #include "bcm_tag.h"
  21 #include "imagetag_cmdline.h"
  22 #include "cyg_crc.h"
  23
  24 #define DEADCODE                        0xDEADC0DE
  25
  26 /* Kernel header */
  27 struct kernelhdr {
  28         uint32_t                loadaddr;       /* Kernel load address */
  29         uint32_t                entry;          /* Kernel entry point address */
  30         uint32_t                lzmalen;        /* Compressed length of the LZMA data that follows */
  31 };
  32
  33 static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;
  34
  35 void int2tag(char *tag, uint32_t value) {
  36   uint32_t network = htonl(value);
  37   memcpy(tag, (char *)(&network), 4);
  38 }
  39
  40 uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
  41 {
  42         uint8_t readbuf[1024];
  43         size_t read;
  44
  45         fseek(binfile, compute_start, SEEK_SET);
  46
  47         /* read block of 1024 bytes */
  48         while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
  49                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
  50                 crc = cyg_crc32_accumulate(crc, readbuf, read);
  51                 compute_len = compute_len - read;
  52         }
  53
  54         /* Less than 1024 bytes remains, read compute_len bytes */
  55         if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
  56                 read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
  57                 crc = cyg_crc32_accumulate(crc, readbuf, read);
  58         }
  59
  60         return crc;
  61 }
  62
  63 size_t getlen(FILE *fp)
  64 {
  65         size_t retval, curpos;
  66
  67         if (!fp)
  68                 return 0;
  69
  70         curpos = ftell(fp);
  71         fseek(fp, 0, SEEK_END);
  72         retval = ftell(fp);
  73         fseek(fp, curpos, SEEK_SET);
  74
  75         return retval;
  76 }
  77
  78 int tagfile(const char *kernel, const char *rootfs, const char *bin, \
  79                         const struct gengetopt_args_info *args, \
  80                         uint32_t flash_start, uint32_t image_offset, \
  81                         uint32_t block_size, uint32_t load_address, uint32_t entry)
  82 {
  83         struct bcm_tag tag;
  84         struct kernelhdr khdr;
  85         FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile = NULL, *cfefile = NULL;
  86         size_t cfeoff, cfelen, kerneloff, kernellen, rootfsoff, rootfslen, \
  87           read, imagelen, rootfsoffpadlen = 0, kernelfslen, kerneloffpadlen = 0, oldrootfslen, \
  88           rootfsend;
  89         uint8_t readbuf[1024];
  90         uint32_t imagecrc = IMAGETAG_CRC_START;
  91         uint32_t kernelcrc = IMAGETAG_CRC_START;
  92         uint32_t rootfscrc = IMAGETAG_CRC_START;
  93         uint32_t kernelfscrc = IMAGETAG_CRC_START;
  94         uint32_t fwaddr = 0;
  95         uint8_t crc_val;
  96         const uint32_t deadcode = htonl(DEADCODE);
  97         int i;
  98         int is_pirelli = 0;
  99
 100
 101         memset(&tag, 0, sizeof(struct bcm_tag));
 102
 103         if (!kernel || !rootfs) {
 104                 fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
 105         }
 106
 107         if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
 108                 fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
 109                 return 1;
 110         }
 111
 112         if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
 113                 fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
 114                 return 1;
 115         }
 116
 117         if (!bin || !(binfile = fopen(bin, "wb+"))) {
 118                 fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
 119                 return 1;
 120         }
 121
 122         if ((args->cfe_given) && (args->cfe_arg)) {
 123           if (!(cfefile = fopen(args->cfe_arg, "rb"))) {
 124                 fprintf(stderr, "Unable to open CFE file \"%s\"\n", args->cfe_arg);
 125           }
 126         }
 127
 128         fwaddr = flash_start + image_offset;
 129         if (cfefile) {
 130           cfeoff = flash_start;
 131           cfelen = getlen(cfefile);
 132           /* Seek to the start of the file after tag */
 133           fseek(binfile, sizeof(tag), SEEK_SET);
 134
 135           /* Write the cfe */
 136           while (cfefile && !feof(cfefile) && !ferror(cfefile)) {
 137                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), cfefile);
 138                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 139           }
 140
 141         } else {
 142           cfeoff = 0;
 143           cfelen = 0;
 144         }
 145
 146         if (!args->root_first_flag) {
 147           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 148           kerneloff = fwaddr + sizeof(tag);
 149
 150           kernellen = getlen(kernelfile);
 151
 152           if (!args->kernel_file_has_header_flag) {
 153                 /* Build the kernel header */
 154                 khdr.loadaddr   = htonl(load_address);
 155                 khdr.entry      = htonl(entry);
 156                 khdr.lzmalen    = htonl(kernellen);
 157
 158                 /* Increase the kernel size by the header size */
 159                 kernellen += sizeof(khdr);
 160           }
 161
 162           /* Build the rootfs address and length */
 163           rootfsoff = kerneloff + kernellen;
 164           /* align the start if requested */
 165           if (args->align_rootfs_flag)
 166                 rootfsoff = (rootfsoff % block_size) > 0 ? (((rootfsoff / block_size) + 1) * block_size) : rootfsoff;
 167
 168           /* align the end */
 169           rootfsend = rootfsoff + getlen(rootfsfile);
 170           if ((rootfsend % block_size) > 0)
 171                 rootfsend = (((rootfsend / block_size) + 1) * block_size);
 172           rootfslen = rootfsend - rootfsoff;
 173           imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
 174           rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
 175
 176           /* Seek to the start of the kernel */
 177           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 178
 179           /* Write the kernel header */
 180           fwrite(&khdr, sizeof(khdr), 1, binfile);
 181
 182           /* Write the kernel */
 183           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 184                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 185                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 186           }
 187
 188           /* Write the RootFS */
 189           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 190           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 191                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 192                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 193           }
 194
 195           /* Align image to specified erase block size and append deadc0de */
 196           printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
 197           fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
 198           fwrite(&deadcode, sizeof(uint32_t), 1, binfile);
 199
 200           oldrootfslen = rootfslen;
 201           if (args->pad_given) {
 202                 uint32_t allfs = 0xffffffff;
 203                 uint32_t pad_size = args->pad_arg * 1024 * 1024;
 204
 205                 printf("Padding image to %d bytes ...\n", pad_size);
 206                 while (imagelen < pad_size) {
 207                         fwrite(&allfs, sizeof(uint32_t), 1, binfile);
 208                         imagelen += 4;
 209                         rootfslen += 4;
 210                 }
 211           }
 212
 213           /* Flush the binfile buffer so that when we read from file, it contains
 214            * everything in the buffer
 215            */
 216           fflush(binfile);
 217
 218           /* Compute the crc32 of the entire image (deadC0de included) */
 219           imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
 220           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 221           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 222           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 223           kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
 224           /* Compute the crc32 of the flashImageStart to rootLength.
 225            * The broadcom firmware assumes the rootfs starts the image,
 226            * therefore uses the rootfs start to determine where to flash
 227            * the image.  Since we have the kernel first we have to give
 228            * it the kernel address, but the crc uses the length
 229            * associated with this address, which is added to the kernel
 230            * length to determine the length of image to flash and thus
 231            * needs to be rootfs + deadcode
 232            */
 233           rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));
 234
 235         } else {
 236           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 237           rootfsoff = fwaddr + sizeof(tag);
 238           oldrootfslen = getlen(rootfsfile);
 239           rootfslen = oldrootfslen;
 240           rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
 241           kerneloffpadlen = rootfslen - oldrootfslen;
 242           oldrootfslen = rootfslen;
 243
 244           kerneloff = rootfsoff + rootfslen;
 245           kernellen = getlen(kernelfile);
 246
 247           imagelen = cfelen + rootfslen + kernellen;
 248
 249           /* Seek to the start of the kernel */
 250           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 251
 252           if (!args->kernel_file_has_header_flag) {
 253                 /* Build the kernel header */
 254                 khdr.loadaddr   = htonl(load_address);
 255                 khdr.entry      = htonl(entry);
 256                 khdr.lzmalen    = htonl(kernellen);
 257
 258                 /* Write the kernel header */
 259                 fwrite(&khdr, sizeof(khdr), 1, binfile);
 260
 261                 /* Increase the kernel size by the header size */
 262                 kernellen += sizeof(khdr);
 263           }
 264
 265           /* Write the kernel */
 266           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 267                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 268                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 269           }
 270
 271           /* Write the RootFS */
 272           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 273           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 274                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 275                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 276           }
 277
 278           /* Flush the binfile buffer so that when we read from file, it contains
 279            * everything in the buffer
 280            */
 281           fflush(binfile);
 282
 283           /* Compute the crc32 of the entire image (deadC0de included) */
 284           imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
 285           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 286           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 287           kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
 288           rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
 289         }
 290
 291         /* Close the files */
 292         if (cfefile) {
 293           fclose(cfefile);
 294         }
 295         fclose(kernelfile);
 296         fclose(rootfsfile);
 297
 298         /* Build the tag */
 299         strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
 300         strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
 301         strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
 302         strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
 303         strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
 304         strcpy(tag.big_endian, "1");
 305         sprintf(tag.totalLength, "%lu", imagelen);
 306
 307         if (args->cfe_given) {
 308           sprintf(tag.cfeAddress, "%" PRIu32, flash_start);
 309           sprintf(tag.cfeLength, "%lu", cfelen);
 310         } else {
 311           /* We don't include CFE */
 312           strcpy(tag.cfeAddress, "0");
 313           strcpy(tag.cfeLength, "0");
 314         }
 315
 316         sprintf(tag.kernelAddress, "%lu", kerneloff);
 317         sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
 318
 319         if (args->root_first_flag) {
 320           sprintf(tag.flashImageStart, "%lu", rootfsoff);
 321           sprintf(tag.flashRootLength, "%lu", rootfslen);
 322         } else {
 323           sprintf(tag.flashImageStart, "%lu", kerneloff);
 324           sprintf(tag.flashRootLength, "%lu", rootfslen + sizeof(deadcode));
 325         }
 326         int2tag(tag.rootLength, oldrootfslen + sizeof(deadcode));
 327
 328         if (args->rsa_signature_given) {
 329             strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
 330         }
 331
 332         if (args->layoutver_given) {
 333             strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
 334         }
 335
 336         if (args->info1_given) {
 337           strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
 338         }
 339
 340         if (args->info2_given) {
 341           strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
 342         }
 343
 344         if (args->reserved2_given) {
 345           strncpy(tag.reserved2, args->reserved2_arg, 16);
 346         }
 347
 348         if (args->altinfo_given) {
 349           strncpy(tag.information1, args->altinfo_arg, TAGINFO1_LEN);
 350         }
 351
 352         if (args->second_image_flag_given) {
 353           if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {
 354                 strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
 355           }
 356         }
 357
 358         if (args->inactive_given) {
 359           if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {
 360                 strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
 361           }
 362         }
 363
 364         for (i = 0; i < NUM_PIRELLI; i++) {
 365                 if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
 366                         is_pirelli = 1;
 367                         break;
 368                 }
 369         }
 370
 371         if ( !is_pirelli ) {
 372           int2tag(tag.imageCRC, kernelfscrc);
 373         } else {
 374           int2tag(tag.imageCRC, kernelcrc);
 375         }
 376
 377         int2tag(&(tag.rootfsCRC[0]), rootfscrc);
 378         int2tag(tag.kernelCRC, kernelcrc);
 379         int2tag(tag.fskernelCRC, kernelfscrc);
 380         int2tag(tag.headerCRC, cyg_crc32_accumulate(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
 381
 382         fseek(binfile, 0L, SEEK_SET);
 383         fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
 384
 385     fflush(binfile);
 386         fclose(binfile);
 387
 388         return 0;
 389 }
 390
 391 int main(int argc, char **argv)
 392 {
 393     int c, i;
 394         char *kernel, *rootfs, *bin;
 395         uint32_t flash_start, image_offset, block_size, load_address, entry;
 396         flash_start = image_offset = block_size = load_address = entry = 0;
 397         struct gengetopt_args_info parsed_args;
 398
 399         kernel = rootfs = bin = NULL;
 400
 401         if (imagetag_cmdline(argc, argv, &parsed_args)) {
 402           exit(1);
 403         }
 404
 405         printf("Broadcom 63xx image tagger - v2.0.0\n");
 406         printf("Copyright (C) 2008 Axel Gembe\n");
 407         printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
 408         printf("Licensed under the terms of the Gnu General Public License\n");
 409
 410         kernel = parsed_args.kernel_arg;
 411         rootfs = parsed_args.rootfs_arg;
 412         bin = parsed_args.output_arg;
 413         if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
 414           fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
 415           exit(1);
 416         }
 417         if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
 418           fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
 419           exit(1);
 420         }
 421         if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
 422           fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
 423           exit(1);
 424         }
 425         if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
 426           fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
 427           exit(1);
 428         }
 429         if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
 430           fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
 431           exit(1);
 432         }
 433         if (parsed_args.layoutver_given) {
 434           if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
 435                 fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
 436                 exit(1);
 437           }
 438         }
 439         if (parsed_args.rsa_signature_given) {
 440           if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
 441                 fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
 442                 exit(1);
 443           }
 444         }
 445
 446         if (parsed_args.info1_given) {
 447           if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
 448                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 449                 exit(1);
 450           }
 451         }
 452
 453         if (parsed_args.info2_given) {
 454           if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
 455                 fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
 456                 exit(1);
 457           }
 458         }
 459
 460         if (parsed_args.altinfo_given) {
 461           if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
 462                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 463                 exit(1);
 464           }
 465         }
 466
 467         if (parsed_args.pad_given) {
 468           if (parsed_args.pad_arg < 0) {
 469                 fprintf(stderr, "Error: pad size must be positive.\r");
 470                 exit(1);
 471           }
 472         }
 473
 474         flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
 475         image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
 476         block_size = strtoul(parsed_args.block_size_arg, NULL, 16);
 477
 478         if (!parsed_args.kernel_file_has_header_flag) {
 479           load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
 480           entry = strtoul(parsed_args.entry_arg, NULL, 16);
 481           if (load_address == 0) {
 482                 fprintf(stderr, "Error: Invalid value for load address\n");
 483           }
 484           if (entry == 0) {
 485                 fprintf(stderr, "Error: Invalid value for entry\n");
 486           }
 487         }
 488
 489         return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
 490 }