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
  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
 167           /* align the end */
 168           rootfsend = rootfsoff + getlen(rootfsfile);
 169           if ((rootfsend % block_size) > 0)
 170                 rootfsend = (((rootfsend / block_size) + 1) * block_size);
 171           rootfslen = rootfsend - rootfsoff;
 172           imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
 173           rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
 174
 175           /* Seek to the start of the kernel */
 176           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 177
 178           /* Write the kernel header */
 179           fwrite(&khdr, sizeof(khdr), 1, binfile);
 180
 181           /* Write the kernel */
 182           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 183                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 184                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 185           }
 186
 187           /* Write the RootFS */
 188           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 189           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 190                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 191                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 192           }
 193
 194           /* Align image to specified erase block size and append deadc0de */
 195           printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
 196           fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
 197           fwrite(&deadcode, sizeof(uint32_t), 1, binfile);
 198
 199           oldrootfslen = rootfslen;
 200           if (args->pad_given) {
 201                 uint32_t allfs = 0xffffffff;
 202                 uint32_t pad_size = args->pad_arg * 1024 * 1024;
 203
 204                 printf("Padding image to %d bytes ...\n", pad_size);
 205                 while (imagelen < pad_size) {
 206                         fwrite(&allfs, sizeof(uint32_t), 1, binfile);
 207                         imagelen += 4;
 208                         rootfslen += 4;
 209                 }
 210           }
 211
 212           /* Flush the binfile buffer so that when we read from file, it contains
 213            * everything in the buffer
 214            */
 215           fflush(binfile);
 216
 217           /* Compute the crc32 of the entire image (deadC0de included) */
 218           imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
 219           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 220           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 221           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 222           kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
 223           /* Compute the crc32 of the flashImageStart to rootLength.
 224            * The broadcom firmware assumes the rootfs starts the image,
 225            * therefore uses the rootfs start to determine where to flash
 226            * the image.  Since we have the kernel first we have to give
 227            * it the kernel address, but the crc uses the length
 228            * associated with this address, which is added to the kernel
 229            * length to determine the length of image to flash and thus
 230            * needs to be rootfs + deadcode
 231            */
 232           rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));
 233
 234         } else {
 235           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 236           rootfsoff = fwaddr + sizeof(tag);
 237           oldrootfslen = getlen(rootfsfile);
 238           rootfslen = oldrootfslen;
 239           rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
 240           kerneloffpadlen = rootfslen - oldrootfslen;
 241           oldrootfslen = rootfslen;
 242
 243           kerneloff = rootfsoff + rootfslen;
 244           kernellen = getlen(kernelfile);
 245
 246           imagelen = cfelen + rootfslen + kernellen;
 247
 248           /* Seek to the start of the kernel */
 249           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 250
 251           if (!args->kernel_file_has_header_flag) {
 252                 /* Build the kernel header */
 253                 khdr.loadaddr   = htonl(load_address);
 254                 khdr.entry      = htonl(entry);
 255                 khdr.lzmalen    = htonl(kernellen);
 256
 257                 /* Write the kernel header */
 258                 fwrite(&khdr, sizeof(khdr), 1, binfile);
 259
 260                 /* Increase the kernel size by the header size */
 261                 kernellen += sizeof(khdr);
 262           }
 263
 264           /* Write the kernel */
 265           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 266                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 267                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 268           }
 269
 270           /* Write the RootFS */
 271           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 272           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 273                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 274                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 275           }
 276
 277           /* Flush the binfile buffer so that when we read from file, it contains
 278            * everything in the buffer
 279            */
 280           fflush(binfile);
 281
 282           /* Compute the crc32 of the entire image (deadC0de included) */
 283           imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
 284           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 285           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 286           kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
 287           rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
 288         }
 289
 290         /* Close the files */
 291         if (cfefile) {
 292           fclose(cfefile);
 293         }
 294         fclose(kernelfile);
 295         fclose(rootfsfile);
 296
 297         /* Build the tag */
 298         strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
 299         strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
 300         strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
 301         strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
 302         strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
 303         strcpy(tag.big_endian, "1");
 304         sprintf(tag.totalLength, "%lu", imagelen);
 305
 306         if (args->cfe_given) {
 307           sprintf(tag.cfeAddress, "%lu", flash_start);
 308           sprintf(tag.cfeLength, "%lu", cfelen);
 309         } else {
 310           /* We don't include CFE */
 311           strcpy(tag.cfeAddress, "0");
 312           strcpy(tag.cfeLength, "0");
 313         }
 314
 315         sprintf(tag.kernelAddress, "%lu", kerneloff);
 316         sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
 317
 318         if (args->root_first_flag) {
 319           sprintf(tag.flashImageStart, "%lu", rootfsoff);
 320           sprintf(tag.flashRootLength, "%lu", rootfslen);
 321         } else {
 322           sprintf(tag.flashImageStart, "%lu", kerneloff);
 323           sprintf(tag.flashRootLength, "%lu", rootfslen + sizeof(deadcode));
 324         }
 325         int2tag(tag.rootLength, oldrootfslen + sizeof(deadcode));
 326
 327         if (args->rsa_signature_given) {
 328             strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
 329         }
 330
 331         if (args->layoutver_given) {
 332             strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
 333         }
 334
 335         if (args->info1_given) {
 336           strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
 337         }
 338
 339         if (args->info2_given) {
 340           strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
 341         }
 342
 343         if (args->reserved2_given) {
 344           strncpy(tag.reserved2, args->reserved2_arg, 16);
 345         }
 346
 347         if (args->altinfo_given) {
 348           strncpy(&tag.information1[0], args->altinfo_arg, ALTTAGINFO_LEN);
 349         }
 350
 351         if (args->second_image_flag_given) {
 352           if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {
 353                 strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
 354           }
 355         }
 356
 357         if (args->inactive_given) {
 358           if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {
 359                 strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
 360           }
 361         }
 362
 363         for (i = 0; i < NUM_PIRELLI; i++) {
 364                 if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
 365                         is_pirelli = 1;
 366                         break;
 367                 }
 368         }
 369
 370         if ( !is_pirelli ) {
 371           int2tag(tag.imageCRC, kernelfscrc);
 372         } else {
 373           int2tag(tag.imageCRC, kernelcrc);
 374         }
 375
 376         int2tag(&(tag.rootfsCRC[0]), rootfscrc);
 377         int2tag(tag.kernelCRC, kernelcrc);
 378         int2tag(tag.fskernelCRC, kernelfscrc);
 379         int2tag(tag.headerCRC, cyg_crc32_accumulate(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
 380
 381         fseek(binfile, 0L, SEEK_SET);
 382         fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
 383
 384     fflush(binfile);
 385         fclose(binfile);
 386
 387         return 0;
 388 }
 389
 390 int main(int argc, char **argv)
 391 {
 392     int c, i;
 393         char *kernel, *rootfs, *bin;
 394         uint32_t flash_start, image_offset, block_size, load_address, entry;
 395         flash_start = image_offset = block_size = load_address = entry = 0;
 396         struct gengetopt_args_info parsed_args;
 397
 398         kernel = rootfs = bin = NULL;
 399
 400         if (imagetag_cmdline(argc, argv, &parsed_args)) {
 401           exit(1);
 402         }
 403
 404         printf("Broadcom 63xx image tagger - v2.0.0\n");
 405         printf("Copyright (C) 2008 Axel Gembe\n");
 406         printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
 407         printf("Licensed under the terms of the Gnu General Public License\n");
 408
 409         kernel = parsed_args.kernel_arg;
 410         rootfs = parsed_args.rootfs_arg;
 411         bin = parsed_args.output_arg;
 412         if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
 413           fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
 414           exit(1);
 415         }
 416         if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
 417           fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
 418           exit(1);
 419         }
 420         if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
 421           fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
 422           exit(1);
 423         }
 424         if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
 425           fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
 426           exit(1);
 427         }
 428         if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
 429           fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
 430           exit(1);
 431         }
 432         if (parsed_args.layoutver_given) {
 433           if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
 434                 fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
 435                 exit(1);
 436           }
 437         }
 438         if (parsed_args.rsa_signature_given) {
 439           if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
 440                 fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
 441                 exit(1);
 442           }
 443         }
 444
 445         if (parsed_args.info1_given) {
 446           if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
 447                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 448                 exit(1);
 449           }
 450         }
 451
 452         if (parsed_args.info2_given) {
 453           if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
 454                 fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
 455                 exit(1);
 456           }
 457         }
 458
 459         if (parsed_args.altinfo_given) {
 460           if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
 461                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 462                 exit(1);
 463           }
 464         }
 465
 466         if (parsed_args.pad_given) {
 467           if (parsed_args.pad_arg < 0) {
 468                 fprintf(stderr, "Error: pad size must be positive.\r");
 469                 exit(1);
 470           }
 471         }
 472
 473         flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
 474         image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
 475         block_size = strtoul(parsed_args.block_size_arg, NULL, 16);
 476
 477         if (!parsed_args.kernel_file_has_header_flag) {
 478           load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
 479           entry = strtoul(parsed_args.entry_arg, NULL, 16);
 480           if (load_address == 0) {
 481                 fprintf(stderr, "Error: Invalid value for load address\n");
 482           }
 483           if (entry == 0) {
 484                 fprintf(stderr, "Error: Invalid value for entry\n");
 485           }
 486         }
 487
 488         return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
 489 }