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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 224#define IMAGETAG_CRC_START 0xFFFFFFFF25 26#define PIRELLI_BOARDS { \27 "AGPF-S0", \28 "DWV-S0", \29}30 31/* Extended flash address, needs to be subtracted32 * from bcm_tag flash image offsets.33 */34#define BCM963XX_EXTENDED_SIZE 0xBFC0000035 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 first40 * we have to give it the kernel address, but the crc uses the length41 * associated with this address (root_length), which is added to the kernel42 * length (kernel_length) to determine the length of image to flash and thus43 * needs to be rootfs + deadcode (jffs2 EOF marker)44*/45 46struct 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 start66 * (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 number76 * (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 it 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__ */104