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 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 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__ */ 104