1#ifndef __BCM63XX_TAG_H 2#define __BCM63XX_TAG_H 3 4#define TAGVER_LEN 4 /* Length of Tag Version */ 5#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */ 6#define SIG1_LEN 20 /* Company Signature 1 Length */ 7#define SIG2_LEN 14 /* Company Signature 2 Lenght */ 8#define BOARDID_LEN 16 /* Length of BoardId */ 9#define ENDIANFLAG_LEN 2 /* Endian Flag Length */ 10#define CHIPID_LEN 6 /* Chip Id Length */ 11#define IMAGE_LEN 10 /* Length of Length Field */ 12#define ADDRESS_LEN 12 /* Length of Address field */ 13#define DUALFLAG_LEN 2 /* Dual Image flag Length */ 14#define INACTIVEFLAG_LEN 2 /* Inactie Flag Length */ 15#define RSASIG_LEN 20 /* Length of RSA Signature in tag */ 16#define TAGINFO1_LEN 30 /* Length of vendor information field1 in tag */ 17#define FLASHLAYOUTVER_LEN 4 /* Length of Flash Layout Version String tag */ 18#define TAGINFO2_LEN 16 /* Length of vendor information field2 in tag */ 19#define CRC_LEN 4 /* Length of CRC in bytes */ 20#define ALTTAGINFO_LEN 54 /* Alternate length for vendor information; Pirelli */ 21 22#define NUM_PIRELLI 2 23#define IMAGETAG_CRC_START 0xFFFFFFFF 24 25#define PIRELLI_BOARDS { \ 26 "AGPF-S0", \ 27 "DWV-S0", \ 28} 29 30/* 31 * The broadcom firmware assumes the rootfs starts the image, 32 * therefore uses the rootfs start (flashImageAddress) 33 * to determine where to flash the image. Since we have the kernel first 34 * we have to give it the kernel address, but the crc uses the length 35 * associated with this address (rootLength), which is added to the kernel 36 * length (kernelLength) to determine the length of image to flash and thus 37 * needs to be rootfs + deadcode (jffs2 EOF marker) 38*/ 39 40struct bcm_tag { 41 char tagVersion[TAGVER_LEN]; // 0-3: Version of the image tag 42 char sig_1[SIG1_LEN]; // 4-23: Company Line 1 43 char sig_2[SIG2_LEN]; // 24-37: Company Line 2 44 char chipid[CHIPID_LEN]; // 38-43: Chip this image is for 45 char boardid[BOARDID_LEN]; // 44-59: Board name 46 char big_endian[ENDIANFLAG_LEN]; // 60-61: Map endianness -- 1 BE 0 LE 47 char totalLength[IMAGE_LEN]; // 62-71: Total length of image 48 char cfeAddress[ADDRESS_LEN]; // 72-83: Address in memory of CFE 49 char cfeLength[IMAGE_LEN]; // 84-93: Size of CFE 50 char flashImageStart[ADDRESS_LEN]; // 94-105: Address in memory of image start (kernel for OpenWRT, rootfs for stock firmware) 51 char flashRootLength[IMAGE_LEN]; // 106-115: Size of rootfs for flashing 52 char kernelAddress[ADDRESS_LEN]; // 116-127: Address in memory of kernel 53 char kernelLength[IMAGE_LEN]; // 128-137: Size of kernel 54 char dualImage[DUALFLAG_LEN]; // 138-139: Unused at present 55 char inactiveFlag[INACTIVEFLAG_LEN]; // 140-141: Unused at present 56 char rsa_signature[RSASIG_LEN]; // 142-161: RSA Signature (unused at present; some vendors may use this) 57 char information1[TAGINFO1_LEN]; // 162-191: Compilation and related information (not generated/used by OpenWRT) 58 char flashLayoutVer[FLASHLAYOUTVER_LEN];// 192-195: Version flash layout 59 char fskernelCRC[CRC_LEN]; // 196-199: kernel+rootfs CRC32 60 char information2[TAGINFO2_LEN]; // 200-215: Unused at present except Alice Gate where is is information 61 char imageCRC[CRC_LEN]; // 216-219: CRC32 of image less imagetag (kernel for Alice Gate) 62 char rootfsCRC[CRC_LEN]; // 220-223: CRC32 of rootfs partition 63 char kernelCRC[CRC_LEN]; // 224-227: CRC32 of kernel partition 64 char imageSequence[4]; // 228-231: Image sequence number 65 char rootLength[4]; // 232-235: steal from reserved1 to keep the real root length so we can use in the flash map even after we have change the rootLength to 0 to satisfy devices that check CRC on every boot 66 char headerCRC[CRC_LEN]; // 236-239: CRC32 of header excluding tagVersion 67 char reserved2[16]; // 240-255: Unused at present 68}; 69 70#endif /* __BCM63XX_TAG_H */ 71