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__ */