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 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