include/linux/bcm963xx_tag.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_BCM963XX_TAG_H__
   3 #define __LINUX_BCM963XX_TAG_H__
   4
   5 #include <linux/types.h>
   6
   7 #define TAGVER_LEN              4       /* Length of Tag Version */
   8 #define TAGLAYOUT_LEN           4       /* Length of FlashLayoutVer */
   9 #define SIG1_LEN                20      /* Company Signature 1 Length */
  10 #define SIG2_LEN                14      /* Company Signature 2 Length */
  11 #define BOARDID_LEN             16      /* Length of BoardId */
  12 #define ENDIANFLAG_LEN          2       /* Endian Flag Length */
  13 #define CHIPID_LEN              6       /* Chip Id Length */
  14 #define IMAGE_LEN               10      /* Length of Length Field */
  15 #define ADDRESS_LEN             12      /* Length of Address field */
  16 #define IMAGE_SEQUENCE_LEN      4       /* Image sequence Length */
  17 #define RSASIG_LEN              20      /* Length of RSA Signature in tag */
  18 #define TAGINFO1_LEN            30      /* Length of vendor information field1 in tag */
  19 #define FLASHLAYOUTVER_LEN      4       /* Length of Flash Layout Version String tag */
  20 #define TAGINFO2_LEN            16      /* Length of vendor information field2 in tag */
  21 #define ALTTAGINFO_LEN          54      /* Alternate length for vendor information; Pirelli */
  22
  23 #define NUM_PIRELLI             2
  24 #define IMAGETAG_CRC_START      0xFFFFFFFF
  25
  26 #define PIRELLI_BOARDS { \
  27         "AGPF-S0", \
  28         "DWV-S0", \
  29 }
  30
  31 /* Extended flash address, needs to be subtracted
  32  * from bcm_tag flash image offsets.
  33  */
  34 #define BCM963XX_EXTENDED_SIZE  0xBFC00000
  35
  36 /*
  37  * The broadcom firmware assumes the rootfs starts the image,
  38  * therefore uses the rootfs start (flash_image_address)
  39  * to determine where to flash the image.  Since we have the kernel first
  40  * we have to give it the kernel address, but the crc uses the length
  41  * associated with this address (root_length), which is added to the kernel
  42  * length (kernel_length) to determine the length of image to flash and thus
  43  * needs to be rootfs + deadcode (jffs2 EOF marker)
  44 */
  45
  46 struct bcm_tag {
  47         /* 0-3: Version of the image tag */
  48         char tag_version[TAGVER_LEN];
  49         /* 4-23: Company Line 1 */
  50         char sig_1[SIG1_LEN];
  51         /*  24-37: Company Line 2 */
  52         char sig_2[SIG2_LEN];
  53         /* 38-43: Chip this image is for */
  54         char chip_id[CHIPID_LEN];
  55         /* 44-59: Board name */
  56         char board_id[BOARDID_LEN];
  57         /* 60-61: Map endianness -- 1 BE 0 LE */
  58         char big_endian[ENDIANFLAG_LEN];
  59         /* 62-71: Total length of image */
  60         char total_length[IMAGE_LEN];
  61         /* 72-83: Address in memory of CFE */
  62         char cfe__address[ADDRESS_LEN];
  63         /* 84-93: Size of CFE */
  64         char cfe_length[IMAGE_LEN];
  65         /* 94-105: Address in memory of image start
  66          * (kernel for OpenWRT, rootfs for stock firmware)
  67          */
  68         char flash_image_start[ADDRESS_LEN];
  69         /* 106-115: Size of rootfs */
  70         char root_length[IMAGE_LEN];
  71         /* 116-127: Address in memory of kernel */
  72         char kernel_address[ADDRESS_LEN];
  73         /* 128-137: Size of kernel */
  74         char kernel_length[IMAGE_LEN];
  75         /* 138-141: Image sequence number
  76          * (to be incremented when flashed with a new image)
  77          */
  78         char image_sequence[IMAGE_SEQUENCE_LEN];
  79         /* 142-161: RSA Signature (not used; some vendors may use this) */
  80         char rsa_signature[RSASIG_LEN];
  81         /* 162-191: Compilation and related information (not used in OpenWrt) */
  82         char information1[TAGINFO1_LEN];
  83         /* 192-195: Version flash layout */
  84         char flash_layout_ver[FLASHLAYOUTVER_LEN];
  85         /* 196-199: kernel+rootfs CRC32 */
  86         __u32 fskernel_crc;
  87         /* 200-215: Unused except on Alice Gate where is is information */
  88         char information2[TAGINFO2_LEN];
  89         /* 216-219: CRC32 of image less imagetag (kernel for Alice Gate) */
  90         __u32 image_crc;
  91         /* 220-223: CRC32 of rootfs partition */
  92         __u32 rootfs_crc;
  93         /* 224-227: CRC32 of kernel partition */
  94         __u32 kernel_crc;
  95         /* 228-235: Unused at present */
  96         char reserved1[8];
  97         /* 236-239: CRC32 of header excluding last 20 bytes */
  98         __u32 header_crc;
  99         /* 240-255: Unused at present */
 100         char reserved2[16];
 101 };
 102
 103 #endif /* __LINUX_BCM63XX_TAG_H__ */