1 // SPDX-License-Identifier: GPL-2.0-only 2 #ifndef __BCM63XX_TAG_H 3 #define __BCM63XX_TAG_H 4 5 #define TAGVER_LEN 4 /* Length of Tag Version */ 6 #define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */ 7 #define SIG1_LEN 20 /* Company Signature 1 Length */ 8 #define SIG2_LEN 14 /* Company Signature 2 Lenght */ 9 #define BOARDID_LEN 16 /* Length of BoardId */ 10 #define ENDIANFLAG_LEN 2 /* Endian Flag Length */ 11 #define CHIPID_LEN 6 /* Chip Id Length */ 12 #define IMAGE_LEN 10 /* Length of Length Field */ 13 #define ADDRESS_LEN 12 /* Length of Address field */ 14 #define DUALFLAG_LEN 2 /* Dual Image flag Length */ 15 #define INACTIVEFLAG_LEN 2 /* Inactie Flag Length */ 16 #define RSASIG_LEN 20 /* Length of RSA Signature in tag */ 17 #define TAGINFO1_LEN 30 /* Length of vendor information field1 in tag */ 18 #define FLASHLAYOUTVER_LEN 4 /* Length of Flash Layout Version String tag */ 19 #define TAGINFO2_LEN 16 /* Length of vendor information field2 in tag */ 20 #define CRC_LEN 4 /* Length of CRC in bytes */ 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 /* 32 * The broadcom firmware assumes the rootfs starts the image, 33 * therefore uses the rootfs start (flashImageAddress) 34 * to determine where to flash the image. Since we have the kernel first 35 * we have to give it the kernel address, but the crc uses the length 36 * associated with this address (rootLength), which is added to the kernel 37 * length (kernelLength) to determine the length of image to flash and thus 38 * needs to be rootfs + deadcode (jffs2 EOF marker) 39 */ 40 41 struct bcm_tag { 42 char tagVersion[TAGVER_LEN]; // 0-3: Version of the image tag 43 char sig_1[SIG1_LEN]; // 4-23: Company Line 1 44 char sig_2[SIG2_LEN]; // 24-37: Company Line 2 45 char chipid[CHIPID_LEN]; // 38-43: Chip this image is for 46 char boardid[BOARDID_LEN]; // 44-59: Board name 47 char big_endian[ENDIANFLAG_LEN]; // 60-61: Map endianness -- 1 BE 0 LE 48 char totalLength[IMAGE_LEN]; // 62-71: Total length of image 49 char cfeAddress[ADDRESS_LEN]; // 72-83: Address in memory of CFE 50 char cfeLength[IMAGE_LEN]; // 84-93: Size of CFE 51 char flashImageStart[ADDRESS_LEN]; // 94-105: Address in memory of image start (kernel for OpenWRT, rootfs for stock firmware) 52 char flashRootLength[IMAGE_LEN]; // 106-115: Size of rootfs for flashing 53 char kernelAddress[ADDRESS_LEN]; // 116-127: Address in memory of kernel 54 char kernelLength[IMAGE_LEN]; // 128-137: Size of kernel 55 char dualImage[DUALFLAG_LEN]; // 138-139: Unused at present 56 char inactiveFlag[INACTIVEFLAG_LEN]; // 140-141: Unused at present 57 char rsa_signature[RSASIG_LEN]; // 142-161: RSA Signature (unused at present; some vendors may use this) 58 char information1[TAGINFO1_LEN]; // 162-191: Compilation and related information (not generated/used by OpenWRT) 59 char flashLayoutVer[FLASHLAYOUTVER_LEN];// 192-195: Version flash layout 60 char fskernelCRC[CRC_LEN]; // 196-199: kernel+rootfs CRC32 61 char information2[TAGINFO2_LEN]; // 200-215: Unused at present except Alice Gate where is is information 62 char imageCRC[CRC_LEN]; // 216-219: CRC32 of image less imagetag (kernel for Alice Gate) 63 char rootfsCRC[CRC_LEN]; // 220-223: CRC32 of rootfs partition 64 char kernelCRC[CRC_LEN]; // 224-227: CRC32 of kernel partition 65 char imageSequence[4]; // 228-231: Image sequence number 66 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 67 char headerCRC[CRC_LEN]; // 236-239: CRC32 of header excluding tagVersion 68 char reserved2[16]; // 240-255: Unused at present 69 }; 70 71 #endif /* __BCM63XX_TAG_H */ 72
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