include/linux/bcm963xx_tag.h

   1 #ifndef __LINUX_BCM963XX_TAG_H__
   2 #define __LINUX_BCM963XX_TAG_H__
   3
   4 #include <linux/types.h>
   5
   6 #define TAGVER_LEN              4       /* Length of Tag Version */
   7 #define TAGLAYOUT_LEN           4       /* Length of FlashLayoutVer */
   8 #define SIG1_LEN                20      /* Company Signature 1 Length */
   9 #define SIG2_LEN                14      /* Company Signature 2 Length */
  10 #define BOARDID_LEN             16      /* Length of BoardId */
  11 #define ENDIANFLAG_LEN          2       /* Endian Flag Length */
  12 #define CHIPID_LEN              6       /* Chip Id Length */
  13 #define IMAGE_LEN               10      /* Length of Length Field */
  14 #define ADDRESS_LEN             12      /* Length of Address field */
  15 #define IMAGE_SEQUENCE_LEN      4       /* Image sequence Length */
  16 #define RSASIG_LEN              20      /* Length of RSA Signature in tag */
  17 #define TAGINFO1_LEN            30      /* Length of vendor information field1 in tag */
  18 #define FLASHLAYOUTVER_LEN      4       /* Length of Flash Layout Version String tag */
  19 #define TAGINFO2_LEN            16      /* Length of vendor information field2 in tag */
  20 #define ALTTAGINFO_LEN          54      /* Alternate length for vendor information; Pirelli */
  21
  22 #define NUM_PIRELLI             2
  23 #define IMAGETAG_CRC_START      0xFFFFFFFF
  24
  25 #define PIRELLI_BOARDS { \
  26         "AGPF-S0", \
  27         "DWV-S0", \
  28 }
  29
  30 /* Extended flash address, needs to be subtracted
  31  * from bcm_tag flash image offsets.
  32  */
  33 #define BCM963XX_EXTENDED_SIZE  0xBFC00000
  34
  35 /*
  36  * The broadcom firmware assumes the rootfs starts the image,
  37  * therefore uses the rootfs start (flash_image_address)
  38  * to determine where to flash the image.  Since we have the kernel first
  39  * we have to give it the kernel address, but the crc uses the length
  40  * associated with this address (root_length), which is added to the kernel
  41  * length (kernel_length) to determine the length of image to flash and thus
  42  * needs to be rootfs + deadcode (jffs2 EOF marker)
  43 */
  44
  45 struct bcm_tag {
  46         /* 0-3: Version of the image tag */
  47         char tag_version[TAGVER_LEN];
  48         /* 4-23: Company Line 1 */
  49         char sig_1[SIG1_LEN];
  50         /*  24-37: Company Line 2 */
  51         char sig_2[SIG2_LEN];
  52         /* 38-43: Chip this image is for */
  53         char chip_id[CHIPID_LEN];
  54         /* 44-59: Board name */
  55         char board_id[BOARDID_LEN];
  56         /* 60-61: Map endianness -- 1 BE 0 LE */
  57         char big_endian[ENDIANFLAG_LEN];
  58         /* 62-71: Total length of image */
  59         char total_length[IMAGE_LEN];
  60         /* 72-83: Address in memory of CFE */
  61         char cfe__address[ADDRESS_LEN];
  62         /* 84-93: Size of CFE */
  63         char cfe_length[IMAGE_LEN];
  64         /* 94-105: Address in memory of image start
  65          * (kernel for OpenWRT, rootfs for stock firmware)
  66          */
  67         char flash_image_start[ADDRESS_LEN];
  68         /* 106-115: Size of rootfs */
  69         char root_length[IMAGE_LEN];
  70         /* 116-127: Address in memory of kernel */
  71         char kernel_address[ADDRESS_LEN];
  72         /* 128-137: Size of kernel */
  73         char kernel_length[IMAGE_LEN];
  74         /* 138-141: Image sequence number
  75          * (to be incremented when flashed with a new image)
  76          */
  77         char image_sequence[IMAGE_SEQUENCE_LEN];
  78         /* 142-161: RSA Signature (not used; some vendors may use this) */
  79         char rsa_signature[RSASIG_LEN];
  80         /* 162-191: Compilation and related information (not used in OpenWrt) */
  81         char information1[TAGINFO1_LEN];
  82         /* 192-195: Version flash layout */
  83         char flash_layout_ver[FLASHLAYOUTVER_LEN];
  84         /* 196-199: kernel+rootfs CRC32 */
  85         __u32 fskernel_crc;
  86         /* 200-215: Unused except on Alice Gate where is is information */
  87         char information2[TAGINFO2_LEN];
  88         /* 216-219: CRC32 of image less imagetag (kernel for Alice Gate) */
  89         __u32 image_crc;
  90         /* 220-223: CRC32 of rootfs partition */
  91         __u32 rootfs_crc;
  92         /* 224-227: CRC32 of kernel partition */
  93         __u32 kernel_crc;
  94         /* 228-235: Unused at present */
  95         char reserved1[8];
  96         /* 236-239: CRC32 of header excluding last 20 bytes */
  97         __u32 header_crc;
  98         /* 240-255: Unused at present */
  99         char reserved2[16];
 100 };
 101
 102 #endif /* __LINUX_BCM63XX_TAG_H__ */