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  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <stdint.h>
  13 #include <time.h>
  14 #include <unistd.h>
  15 #include <sys/stat.h>
  16 #include <netinet/in.h>
  17
  18 #define IMAGETAG_MAGIC1                 "OpenWRT BCM963xx"
  19 #define IMAGETAG_MAGIC2                 "V1"
  20 #define IMAGETAG_VER                    "6"
  21 #define IMAGETAG_DEFAULT_LOADADDR       0x80010000
  22 #define IMAGETAG_CRC_START              0xFFFFFFFF
  23 #define FLASH_CFE_SIZE                  0x10000                 /* TODO: Make this a command line option */
  24 #define FLASH_START                     0xBFC00000              /* TODO: Make this a command line option */
  25 #define FLASH_BS                        (64 * 1024)             /* TODO: Make this a command line option */
  26
  27 /* Kernel header */
  28 struct kernelhdr {
  29         uint32_t                loadaddr;       /* Kernel load address */
  30         uint32_t                entry;          /* Kernel entry point address */
  31         uint32_t                lzmalen;        /* Compressed length of the LZMA data that follows */
  32 };
  33
  34 /* Image component */
  35 struct imagecomp {
  36         uint8_t                 address[12];    /* Address of this component as ASCII */
  37         uint8_t                 len[10];        /* Length of this component as ASCII */
  38 };
  39
  40 /* Image tag */
  41 struct imagetag {
  42         uint8_t                 tagver[4];      /*   0 -   3: Version of the tag as ASCII (2) */
  43         uint8_t                 sig1[20];       /*   4 -  23: BCM_MAGIC_1 */
  44         uint8_t                 sig2[14];       /*  24 -  37: BCM_MAGIC_2 */
  45         uint8_t                 chipid[6];      /*  38 -  43: Chip id as ASCII (6345) */
  46         uint8_t                 boardid[16];    /*  44 -  59: Board id as ASCII (96345GW2, etc...) */
  47         uint8_t                 bigendian[2];   /*  60 -  61: "1" for big endian, "0" for little endian */
  48         uint8_t                 imagelen[10];   /*  62 -  71: The length of all data that follows */
  49         struct imagecomp        cfe;            /*  72 -  93: The offset and length of CFE */
  50         struct imagecomp        rootfs;         /*  94 - 115: The offset and length of the root file system */
  51         struct imagecomp        kernel;         /* 116 - 137: The offset and length of the kernel */
  52         uint8_t                 dualimage[2];   /* 138 - 139: use "0" here */
  53         uint8_t                 inactive[2];    /* 140 - 141: use "0" here */
  54         uint8_t                 reserved1[74];  /* 142 - 215: reserved */
  55         uint32_t                imagecrc;       /* 216 - 219: crc of the images (net byte order) */
  56         uint8_t                 reserved2[16];  /* 220 - 235: reserved */
  57         uint32_t                headercrc;      /* 236 - 239: crc starting from sig1 until headercrc (net byte order) */
  58         uint8_t                 reserved3[16];  /* 240 - 255: reserved */
  59 };
  60
  61 static uint32_t crc32tab[256] = {
  62         0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
  63         0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
  64         0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
  65         0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
  66         0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
  67         0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
  68         0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
  69         0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
  70         0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
  71         0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
  72         0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
  73         0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
  74         0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
  75         0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
  76         0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
  77         0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
  78         0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
  79         0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
  80         0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
  81         0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
  82         0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
  83         0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
  84         0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
  85         0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
  86         0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
  87         0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
  88         0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
  89         0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
  90         0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
  91         0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
  92         0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
  93         0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
  94 };
  95
  96 uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
  97 {
  98         while (len--)
  99                 crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];
 100
 101         return crc;
 102 }
 103
 104 size_t getlen(FILE *fp)
 105 {
 106         size_t retval, curpos;
 107
 108         if (!fp)
 109                 return 0;
 110
 111         curpos = ftell(fp);
 112         fseek(fp, 0, SEEK_END);
 113         retval = ftell(fp);
 114         fseek(fp, curpos, SEEK_SET);
 115
 116         return retval;
 117 }
 118
 119 int tagfile(const char *kernel, const char *rootfs, const char *bin,
 120             const char *boardid, const char *chipid, const uint32_t loadaddr,
 121             const uint32_t entry)
 122 {
 123         struct imagetag tag;
 124         struct kernelhdr khdr;
 125         FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile;
 126         size_t kerneloff, kernellen, rootfsoff, rootfslen, read;
 127         uint8_t readbuf[1024];
 128         uint32_t crc;
 129
 130         memset(&tag, 0, sizeof(struct imagetag));
 131
 132         if (strlen(boardid) >= sizeof(tag.boardid)) {
 133                 fprintf(stderr, "Board id is too long!\n");
 134                 return 1;
 135         }
 136
 137         if (strlen(chipid) >= sizeof(tag.chipid)) {
 138                 fprintf(stderr, "Chip id is too long!\n");
 139                 return 1;
 140         }
 141
 142         if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
 143                 fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
 144                 return 1;
 145         }
 146
 147         if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
 148                 fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
 149                 return 1;
 150         }
 151
 152         if (!bin || !(binfile = fopen(bin, "wb"))) {
 153                 fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
 154                 return 1;
 155         }
 156
 157         /* Build the kernel address and length (doesn't need to be aligned, read only) */
 158         kerneloff = FLASH_START + FLASH_CFE_SIZE + sizeof(tag);
 159         kernellen = getlen(kernelfile);
 160
 161         /* Build the kernel header */
 162         khdr.loadaddr   = htonl(loadaddr);
 163         khdr.entry      = htonl(entry);
 164         khdr.lzmalen    = htonl(kernellen);
 165
 166         /* Increase the kernel size by the header size */
 167         kernellen += sizeof(khdr);
 168
 169         /* Build the rootfs address and length (start and end do need to be aligned on flash erase block boundaries */
 170         rootfsoff = kerneloff + kernellen;
 171         rootfsoff = (rootfsoff % FLASH_BS) > 0 ? (((rootfsoff / FLASH_BS) + 1) * FLASH_BS) : rootfsoff;
 172         rootfslen = getlen(rootfsfile);
 173         rootfslen = (rootfslen % FLASH_BS) > 0 ? (((rootfslen / FLASH_BS) + 1) * FLASH_BS) : rootfslen;
 174
 175         /* Seek to the start of the kernel */
 176         fseek(binfile, kerneloff - FLASH_START - FLASH_CFE_SIZE, SEEK_SET);
 177
 178         /* Write the kernel header */
 179         crc = crc32(IMAGETAG_CRC_START, (uint8_t*)&khdr, sizeof(khdr));
 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                 crc = crc32(crc, readbuf, read);
 186                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 187         }
 188
 189         /* Write the RootFS */
 190         fseek(binfile, rootfsoff - FLASH_START - FLASH_CFE_SIZE, SEEK_SET);
 191         while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 192                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 193                 /*
 194                  * TODO: Is this necessary ?
 195                  * crc = crc32(crc, readbuf, read);
 196                  */
 197                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 198         }
 199
 200         /* Close the files */
 201         fclose(kernelfile);
 202         fclose(rootfsfile);
 203
 204         /* Build the tag */
 205         strcpy(tag.tagver, IMAGETAG_VER);
 206         strncpy(tag.sig1, IMAGETAG_MAGIC1, sizeof(tag.sig1) - 1);
 207         strncpy(tag.sig2, IMAGETAG_MAGIC2, sizeof(tag.sig1) - 1);
 208         strcpy(tag.chipid, chipid);
 209         strcpy(tag.boardid, boardid);
 210         strcpy(tag.bigendian, "1");
 211         sprintf(tag.imagelen, "%lu", kernellen + rootfslen);
 212
 213         /* We don't include CFE */
 214         strcpy(tag.cfe.address, "0");
 215         strcpy(tag.cfe.len, "0");
 216
 217         if (kernelfile) {
 218                 sprintf(tag.kernel.address, "%lu", kerneloff);
 219                 sprintf(tag.kernel.len, "%lu", kernellen);
 220         }
 221
 222         if (rootfsfile) {
 223                 sprintf(tag.rootfs.address, "%lu", rootfsoff);
 224                 sprintf(tag.rootfs.len, "%lu", rootfslen);
 225         }
 226
 227         tag.imagecrc = htonl(crc);
 228         tag.headercrc = htonl(crc32(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
 229
 230         fseek(binfile, 0L, SEEK_SET);
 231         fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
 232
 233         fclose(binfile);
 234
 235         return 0;
 236 }
 237
 238 int main(int argc, char **argv)
 239 {
 240         int c;
 241         char *kernel, *rootfs, *bin, *boardid, *chipid;
 242         uint32_t loadaddr, entry;
 243
 244         kernel = rootfs = bin = boardid = chipid = NULL;
 245         entry = 0;
 246
 247         loadaddr = IMAGETAG_DEFAULT_LOADADDR;
 248
 249         printf("Broadcom image tagger - v0.1.0\n");
 250         printf("Copyright (C) 2008 Axel Gembe\n");
 251
 252         while ((c = getopt(argc, argv, "i:f:o:b:c:l:e:h")) != -1) {
 253                 switch (c) {
 254                         case 'i':
 255                                 kernel = optarg;
 256                                 break;
 257                         case 'f':
 258                                 rootfs = optarg;
 259                                 break;
 260                         case 'o':
 261                                 bin = optarg;
 262                                 break;
 263                         case 'b':
 264                                 boardid = optarg;
 265                                 break;
 266                         case 'c':
 267                                 chipid = optarg;
 268                                 break;
 269                         case 'l':
 270                                 loadaddr = strtoul(optarg, NULL, 16);
 271                                 break;
 272                         case 'e':
 273                                 entry = strtoul(optarg, NULL, 16);
 274                                 break;
 275                         case 'h':
 276                         default:
 277                                 fprintf(stderr, "Usage: imagetag <parameters>\n");
 278                                 fprintf(stderr, "-i <kernel>   - The LZMA compressed kernel file to include in the image\n");
 279                                 fprintf(stderr, "-f <rootfs>   - The RootFS file to include in the image\n");
 280                                 fprintf(stderr, "-o <bin>      - The output file\n");
 281                                 fprintf(stderr, "-b <boardid>  - The board id to set in the image (i.e. \"96345GW2\")\n");
 282                                 fprintf(stderr, "-c <chipid>   - The chip id to set in the image (i.e. \"6345\")\n");
 283                                 fprintf(stderr, "-l <loadaddr> - Address where the kernel expects to be loaded (defaults to 0x80010000)\n");
 284                                 fprintf(stderr, "-e <entry>    - Address where the kernel entry point will end up\n");
 285                                 fprintf(stderr, "-h            - Displays this text\n");
 286                                 return 1;
 287                 }
 288         }
 289
 290         if (!boardid || !chipid) {
 291                 fprintf(stderr, "You need to specify the board (-b) and chip id (-c)!\n");
 292                 return 1;
 293         }
 294
 295         if (entry == 0) {
 296                 fprintf(stderr, "You need to specify the kernel entry (-e)\n");
 297                 return 1;
 298         }
 299
 300         return tagfile(kernel, rootfs, bin, boardid, chipid, loadaddr, entry);
 301 }