include/linux/bcm963xx_tag.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __LINUX_BCM963XX_TAG_H__
0003 #define __LINUX_BCM963XX_TAG_H__
0004
0005 #include <linux/types.h>
0006
0007 #define TAGVER_LEN      4   /* Length of Tag Version */
0008 #define TAGLAYOUT_LEN       4   /* Length of FlashLayoutVer */
0009 #define SIG1_LEN        20  /* Company Signature 1 Length */
0010 #define SIG2_LEN        14  /* Company Signature 2 Length */
0011 #define BOARDID_LEN     16  /* Length of BoardId */
0012 #define ENDIANFLAG_LEN      2   /* Endian Flag Length */
0013 #define CHIPID_LEN      6   /* Chip Id Length */
0014 #define IMAGE_LEN       10  /* Length of Length Field */
0015 #define ADDRESS_LEN     12  /* Length of Address field */
0016 #define IMAGE_SEQUENCE_LEN  4   /* Image sequence Length */
0017 #define RSASIG_LEN      20  /* Length of RSA Signature in tag */
0018 #define TAGINFO1_LEN        30  /* Length of vendor information field1 in tag */
0019 #define FLASHLAYOUTVER_LEN  4   /* Length of Flash Layout Version String tag */
0020 #define TAGINFO2_LEN        16  /* Length of vendor information field2 in tag */
0021 #define ALTTAGINFO_LEN      54  /* Alternate length for vendor information; Pirelli */
0022
0023 #define NUM_PIRELLI     2
0024 #define IMAGETAG_CRC_START  0xFFFFFFFF
0025
0026 #define PIRELLI_BOARDS { \
0027     "AGPF-S0", \
0028     "DWV-S0", \
0029 }
0030
0031 /* Extended flash address, needs to be subtracted
0032  * from bcm_tag flash image offsets.
0033  */
0034 #define BCM963XX_EXTENDED_SIZE  0xBFC00000
0035
0036 /*
0037  * The broadcom firmware assumes the rootfs starts the image,
0038  * therefore uses the rootfs start (flash_image_address)
0039  * to determine where to flash the image.  Since we have the kernel first
0040  * we have to give it the kernel address, but the crc uses the length
0041  * associated with this address (root_length), which is added to the kernel
0042  * length (kernel_length) to determine the length of image to flash and thus
0043  * needs to be rootfs + deadcode (jffs2 EOF marker)
0044 */
0045
0046 struct bcm_tag {
0047     /* 0-3: Version of the image tag */
0048     char tag_version[TAGVER_LEN];
0049     /* 4-23: Company Line 1 */
0050     char sig_1[SIG1_LEN];
0051     /*  24-37: Company Line 2 */
0052     char sig_2[SIG2_LEN];
0053     /* 38-43: Chip this image is for */
0054     char chip_id[CHIPID_LEN];
0055     /* 44-59: Board name */
0056     char board_id[BOARDID_LEN];
0057     /* 60-61: Map endianness -- 1 BE 0 LE */
0058     char big_endian[ENDIANFLAG_LEN];
0059     /* 62-71: Total length of image */
0060     char total_length[IMAGE_LEN];
0061     /* 72-83: Address in memory of CFE */
0062     char cfe__address[ADDRESS_LEN];
0063     /* 84-93: Size of CFE */
0064     char cfe_length[IMAGE_LEN];
0065     /* 94-105: Address in memory of image start
0066      * (kernel for OpenWRT, rootfs for stock firmware)
0067      */
0068     char flash_image_start[ADDRESS_LEN];
0069     /* 106-115: Size of rootfs */
0070     char root_length[IMAGE_LEN];
0071     /* 116-127: Address in memory of kernel */
0072     char kernel_address[ADDRESS_LEN];
0073     /* 128-137: Size of kernel */
0074     char kernel_length[IMAGE_LEN];
0075     /* 138-141: Image sequence number
0076      * (to be incremented when flashed with a new image)
0077      */
0078     char image_sequence[IMAGE_SEQUENCE_LEN];
0079     /* 142-161: RSA Signature (not used; some vendors may use this) */
0080     char rsa_signature[RSASIG_LEN];
0081     /* 162-191: Compilation and related information (not used in OpenWrt) */
0082     char information1[TAGINFO1_LEN];
0083     /* 192-195: Version flash layout */
0084     char flash_layout_ver[FLASHLAYOUTVER_LEN];
0085     /* 196-199: kernel+rootfs CRC32 */
0086     __u32 fskernel_crc;
0087     /* 200-215: Unused except on Alice Gate where it is information */
0088     char information2[TAGINFO2_LEN];
0089     /* 216-219: CRC32 of image less imagetag (kernel for Alice Gate) */
0090     __u32 image_crc;
0091     /* 220-223: CRC32 of rootfs partition */
0092     __u32 rootfs_crc;
0093     /* 224-227: CRC32 of kernel partition */
0094     __u32 kernel_crc;
0095     /* 228-235: Unused at present */
0096     char reserved1[8];
0097     /* 236-239: CRC32 of header excluding last 20 bytes */
0098     __u32 header_crc;
0099     /* 240-255: Unused at present */
0100     char reserved2[16];
0101 };
0102
0103 #endif /* __LINUX_BCM63XX_TAG_H__ */