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 <unistd.h>
  15 #include <sys/stat.h>
  16 #include <netinet/in.h>
  17 #include <inttypes.h>
  18
  19 #include "bcm_tag.h"
  20 #include "imagetag_cmdline.h"
  21 #include "cyg_crc.h"
  22
  23 #define DEADCODE                        0xDEADC0DE
  24
  25 /* Kernel header */
  26 struct kernelhdr {
  27         uint32_t                loadaddr;       /* Kernel load address */
  28         uint32_t                entry;          /* Kernel entry point address */
  29         uint32_t                lzmalen;        /* Compressed length of the LZMA data that follows */
  30 };
  31
  32 static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;
  33
  34 void int2tag(char *tag, uint32_t value) {
  35   uint32_t network = htonl(value);
  36   memcpy(tag, (char *)(&network), 4);
  37 }
  38
  39 uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
  40 {
  41         uint8_t readbuf[1024];
  42         size_t read;
  43
  44         fseek(binfile, compute_start, SEEK_SET);
  45
  46         /* read block of 1024 bytes */
  47         while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
  48                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
  49                 crc = cyg_crc32_accumulate(crc, readbuf, read);
  50                 compute_len = compute_len - read;
  51         }
  52
  53         /* Less than 1024 bytes remains, read compute_len bytes */
  54         if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
  55                 read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
  56                 crc = cyg_crc32_accumulate(crc, readbuf, read);
  57         }
  58
  59         return crc;
  60 }
  61
  62 size_t getlen(FILE *fp)
  63 {
  64         size_t retval, curpos;
  65
  66         if (!fp)
  67                 return 0;
  68
  69         curpos = ftell(fp);
  70         fseek(fp, 0, SEEK_END);
  71         retval = ftell(fp);
  72         fseek(fp, curpos, SEEK_SET);
  73
  74         return retval;
  75 }
  76
  77 int tagfile(const char *kernel, const char *rootfs, const char *bin, \
  78                         const struct gengetopt_args_info *args, \
  79                         uint32_t flash_start, uint32_t image_offset, \
  80                         uint32_t block_size, uint32_t load_address, uint32_t entry)
  81 {
  82         struct bcm_tag tag;
  83         struct kernelhdr khdr;
  84         FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile = NULL, *cfefile = NULL;
  85         size_t cfeoff, cfelen, kerneloff, kernellen, rootfsoff, rootfslen, \
  86           read, imagelen, rootfsoffpadlen = 0, kernelfslen, kerneloffpadlen = 0, oldrootfslen, \
  87           rootfsend;
  88         uint8_t readbuf[1024];
  89         uint32_t imagecrc = IMAGETAG_CRC_START;
  90         uint32_t kernelcrc = IMAGETAG_CRC_START;
  91         uint32_t rootfscrc = IMAGETAG_CRC_START;
  92         uint32_t kernelfscrc = IMAGETAG_CRC_START;
  93         uint32_t fwaddr = 0;
  94         uint8_t crc_val;
  95         const uint32_t deadcode = htonl(DEADCODE);
  96         int i;
  97         int is_pirelli = 0;
  98
  99
 100         memset(&tag, 0, sizeof(struct bcm_tag));
 101
 102         if (!kernel || !rootfs) {
 103                 fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
 104         }
 105
 106         if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
 107                 fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
 108                 return 1;
 109         }
 110
 111         if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
 112                 fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
 113                 return 1;
 114         }
 115
 116         if (!bin || !(binfile = fopen(bin, "wb+"))) {
 117                 fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
 118                 return 1;
 119         }
 120
 121         if ((args->cfe_given) && (args->cfe_arg)) {
 122           if (!(cfefile = fopen(args->cfe_arg, "rb"))) {
 123                 fprintf(stderr, "Unable to open CFE file \"%s\"\n", args->cfe_arg);
 124           }
 125         }
 126
 127         fwaddr = flash_start + image_offset;
 128         if (cfefile) {
 129           cfeoff = flash_start;
 130           cfelen = getlen(cfefile);
 131           /* Seek to the start of the file after tag */
 132           fseek(binfile, sizeof(tag), SEEK_SET);
 133
 134           /* Write the cfe */
 135           while (cfefile && !feof(cfefile) && !ferror(cfefile)) {
 136                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), cfefile);
 137                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 138           }
 139
 140         } else {
 141           cfeoff = 0;
 142           cfelen = 0;
 143         }
 144
 145         if (!args->root_first_flag) {
 146           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 147           kerneloff = fwaddr + sizeof(tag);
 148
 149           kernellen = getlen(kernelfile);
 150
 151           if (!args->kernel_file_has_header_flag) {
 152                 /* Build the kernel header */
 153                 khdr.loadaddr   = htonl(load_address);
 154                 khdr.entry      = htonl(entry);
 155                 khdr.lzmalen    = htonl(kernellen);
 156
 157                 /* Increase the kernel size by the header size */
 158                 kernellen += sizeof(khdr);
 159           }
 160
 161           /* Build the rootfs address and length */
 162           rootfsoff = kerneloff + kernellen;
 163           /* align the start if requested */
 164           if (args->align_rootfs_flag)
 165                 rootfsoff = (rootfsoff % block_size) > 0 ? (((rootfsoff / block_size) + 1) * block_size) : rootfsoff;
 166           else
 167                 rootfsoff = (rootfsoff % 4) > 0 ? (((rootfsoff / 4) + 1) * 4) : rootfsoff;
 168
 169           /* align the end */
 170           rootfsend = rootfsoff + getlen(rootfsfile);
 171           if ((rootfsend % block_size) > 0)
 172                 rootfsend = (((rootfsend / block_size) + 1) * block_size);
 173           rootfslen = rootfsend - rootfsoff;
 174           imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
 175           rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
 176
 177           /* Seek to the start of the kernel */
 178           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 179
 180           /* Write the kernel header */
 181           fwrite(&khdr, sizeof(khdr), 1, binfile);
 182
 183           /* Write the kernel */
 184           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 185                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 186                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 187           }
 188
 189           /* Write the RootFS */
 190           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 191           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 192                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 193                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 194           }
 195
 196           /* Align image to specified erase block size and append deadc0de */
 197           printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
 198           fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
 199           fwrite(&deadcode, sizeof(uint32_t), 1, binfile);
 200
 201           oldrootfslen = rootfslen;
 202           if (args->pad_given) {
 203                 uint32_t allfs = 0xffffffff;
 204                 uint32_t pad_size = args->pad_arg * 1024 * 1024;
 205
 206                 printf("Padding image to %d bytes ...\n", pad_size);
 207                 while (imagelen < pad_size) {
 208                         fwrite(&allfs, sizeof(uint32_t), 1, binfile);
 209                         imagelen += 4;
 210                         rootfslen += 4;
 211                 }
 212           }
 213
 214           /* Flush the binfile buffer so that when we read from file, it contains
 215            * everything in the buffer
 216            */
 217           fflush(binfile);
 218
 219           /* Compute the crc32 of the entire image (deadC0de included) */
 220           imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
 221           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 222           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 223           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 224           kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
 225           /* Compute the crc32 of the flashImageStart to rootLength.
 226            * The broadcom firmware assumes the rootfs starts the image,
 227            * therefore uses the rootfs start to determine where to flash
 228            * the image.  Since we have the kernel first we have to give
 229            * it the kernel address, but the crc uses the length
 230            * associated with this address, which is added to the kernel
 231            * length to determine the length of image to flash and thus
 232            * needs to be rootfs + deadcode
 233            */
 234           rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));
 235
 236         } else {
 237           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 238           rootfsoff = fwaddr + sizeof(tag);
 239           oldrootfslen = getlen(rootfsfile);
 240           rootfslen = oldrootfslen;
 241           rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
 242           kerneloffpadlen = rootfslen - oldrootfslen;
 243           oldrootfslen = rootfslen;
 244
 245           kerneloff = rootfsoff + rootfslen;
 246           kernellen = getlen(kernelfile);
 247
 248           imagelen = cfelen + rootfslen + kernellen;
 249
 250           /* Seek to the start of the kernel */
 251           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 252
 253           if (!args->kernel_file_has_header_flag) {
 254                 /* Build the kernel header */
 255                 khdr.loadaddr   = htonl(load_address);
 256                 khdr.entry      = htonl(entry);
 257                 khdr.lzmalen    = htonl(kernellen);
 258
 259                 /* Write the kernel header */
 260                 fwrite(&khdr, sizeof(khdr), 1, binfile);
 261
 262                 /* Increase the kernel size by the header size */
 263                 kernellen += sizeof(khdr);
 264           }
 265
 266           /* Write the kernel */
 267           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 268                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 269                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 270           }
 271
 272           /* Write the RootFS */
 273           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 274           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 275                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 276                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 277           }
 278
 279           /* Flush the binfile buffer so that when we read from file, it contains
 280            * everything in the buffer
 281            */
 282           fflush(binfile);
 283
 284           /* Compute the crc32 of the entire image (deadC0de included) */
 285           imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
 286           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 287           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 288           kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
 289           rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
 290         }
 291
 292         /* Close the files */
 293         if (cfefile) {
 294           fclose(cfefile);
 295         }
 296         fclose(kernelfile);
 297         fclose(rootfsfile);
 298
 299         /* Build the tag */
 300         strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
 301         strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
 302         strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
 303         strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
 304         strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
 305         strcpy(tag.big_endian, "1");
 306         sprintf(tag.totalLength, "%lu", imagelen);
 307
 308         if (args->cfe_given) {
 309           sprintf(tag.cfeAddress, "%" PRIu32, flash_start);
 310           sprintf(tag.cfeLength, "%lu", cfelen);
 311         } else {
 312           /* We don't include CFE */
 313           strcpy(tag.cfeAddress, "0");
 314           strcpy(tag.cfeLength, "0");
 315         }
 316
 317         sprintf(tag.kernelAddress, "%lu", kerneloff);
 318         sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
 319
 320         if (args->root_first_flag) {
 321           sprintf(tag.flashImageStart, "%lu", rootfsoff);
 322           sprintf(tag.flashRootLength, "%lu", rootfslen);
 323         } else {
 324           sprintf(tag.flashImageStart, "%lu", kerneloff);
 325           sprintf(tag.flashRootLength, "%lu", rootfslen + sizeof(deadcode));
 326         }
 327         int2tag(tag.rootLength, oldrootfslen + sizeof(deadcode));
 328
 329         if (args->rsa_signature_given) {
 330             strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
 331         }
 332
 333         if (args->layoutver_given) {
 334             strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
 335         }
 336
 337         if (args->info1_given) {
 338           strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
 339         }
 340
 341         if (args->info2_given) {
 342           strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
 343         }
 344
 345         if (args->reserved2_given) {
 346           strncpy(tag.reserved2, args->reserved2_arg, 16);
 347         }
 348
 349         if (args->altinfo_given) {
 350           strncpy(tag.information1, args->altinfo_arg, TAGINFO1_LEN);
 351         }
 352
 353         if (args->second_image_flag_given) {
 354           if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {
 355                 strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
 356           }
 357         }
 358
 359         if (args->inactive_given) {
 360           if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {
 361                 strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
 362           }
 363         }
 364
 365         for (i = 0; i < NUM_PIRELLI; i++) {
 366                 if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
 367                         is_pirelli = 1;
 368                         break;
 369                 }
 370         }
 371
 372         if ( !is_pirelli ) {
 373           int2tag(tag.imageCRC, kernelfscrc);
 374         } else {
 375           int2tag(tag.imageCRC, kernelcrc);
 376         }
 377
 378         int2tag(&(tag.rootfsCRC[0]), rootfscrc);
 379         int2tag(tag.kernelCRC, kernelcrc);
 380         int2tag(tag.fskernelCRC, kernelfscrc);
 381         int2tag(tag.headerCRC, cyg_crc32_accumulate(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
 382
 383         fseek(binfile, 0L, SEEK_SET);
 384         fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
 385
 386     fflush(binfile);
 387         fclose(binfile);
 388
 389         return 0;
 390 }
 391
 392 int main(int argc, char **argv)
 393 {
 394     int c, i;
 395         char *kernel, *rootfs, *bin;
 396         uint32_t flash_start, image_offset, block_size, load_address, entry;
 397         flash_start = image_offset = block_size = load_address = entry = 0;
 398         struct gengetopt_args_info parsed_args;
 399
 400         kernel = rootfs = bin = NULL;
 401
 402         if (imagetag_cmdline(argc, argv, &parsed_args)) {
 403           exit(1);
 404         }
 405
 406         printf("Broadcom 63xx image tagger - v2.0.0\n");
 407         printf("Copyright (C) 2008 Axel Gembe\n");
 408         printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
 409         printf("Licensed under the terms of the Gnu General Public License\n");
 410
 411         kernel = parsed_args.kernel_arg;
 412         rootfs = parsed_args.rootfs_arg;
 413         bin = parsed_args.output_arg;
 414         if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
 415           fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
 416           exit(1);
 417         }
 418         if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
 419           fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
 420           exit(1);
 421         }
 422         if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
 423           fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
 424           exit(1);
 425         }
 426         if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
 427           fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
 428           exit(1);
 429         }
 430         if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
 431           fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
 432           exit(1);
 433         }
 434         if (parsed_args.layoutver_given) {
 435           if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
 436                 fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
 437                 exit(1);
 438           }
 439         }
 440         if (parsed_args.rsa_signature_given) {
 441           if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
 442                 fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
 443                 exit(1);
 444           }
 445         }
 446
 447         if (parsed_args.info1_given) {
 448           if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
 449                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 450                 exit(1);
 451           }
 452         }
 453
 454         if (parsed_args.info2_given) {
 455           if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
 456                 fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
 457                 exit(1);
 458           }
 459         }
 460
 461         if (parsed_args.altinfo_given) {
 462           if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
 463                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 464                 exit(1);
 465           }
 466         }
 467
 468         if (parsed_args.pad_given) {
 469           if (parsed_args.pad_arg < 0) {
 470                 fprintf(stderr, "Error: pad size must be positive.\r");
 471                 exit(1);
 472           }
 473         }
 474
 475         flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
 476         image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
 477         block_size = strtoul(parsed_args.block_size_arg, NULL, 16);
 478
 479         if (!parsed_args.kernel_file_has_header_flag) {
 480           load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
 481           entry = strtoul(parsed_args.entry_arg, NULL, 16);
 482           if (load_address == 0) {
 483                 fprintf(stderr, "Error: Invalid value for load address\n");
 484           }
 485           if (entry == 0) {
 486                 fprintf(stderr, "Error: Invalid value for entry\n");
 487           }
 488         }
 489
 490         return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
 491 }