71 lines
4.2 KiB
C
71 lines
4.2 KiB
C
#ifndef __BCM63XX_TAG_H
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#define __BCM63XX_TAG_H
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#define TAGVER_LEN 4 /* Length of Tag Version */
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#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */
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#define SIG1_LEN 20 /* Company Signature 1 Length */
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#define SIG2_LEN 14 /* Company Signature 2 Lenght */
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#define BOARDID_LEN 16 /* Length of BoardId */
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#define ENDIANFLAG_LEN 2 /* Endian Flag Length */
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#define CHIPID_LEN 6 /* Chip Id Length */
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#define IMAGE_LEN 10 /* Length of Length Field */
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#define ADDRESS_LEN 12 /* Length of Address field */
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#define DUALFLAG_LEN 2 /* Dual Image flag Length */
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#define INACTIVEFLAG_LEN 2 /* Inactie Flag Length */
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#define RSASIG_LEN 20 /* Length of RSA Signature in tag */
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#define TAGINFO1_LEN 30 /* Length of vendor information field1 in tag */
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#define FLASHLAYOUTVER_LEN 4 /* Length of Flash Layout Version String tag */
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#define TAGINFO2_LEN 16 /* Length of vendor information field2 in tag */
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#define CRC_LEN 4 /* Length of CRC in bytes */
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#define ALTTAGINFO_LEN 54 /* Alternate length for vendor information; Pirelli */
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#define NUM_PIRELLI 2
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#define IMAGETAG_CRC_START 0xFFFFFFFF
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#define PIRELLI_BOARDS { \
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"AGPF-S0", \
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"DWV-S0", \
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}
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/*
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* The broadcom firmware assumes the rootfs starts the image,
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* therefore uses the rootfs start (flashImageAddress)
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* to determine where to flash the image. Since we have the kernel first
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* we have to give it the kernel address, but the crc uses the length
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* associated with this address (rootLength), which is added to the kernel
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* length (kernelLength) to determine the length of image to flash and thus
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* needs to be rootfs + deadcode (jffs2 EOF marker)
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*/
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struct bcm_tag {
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char tagVersion[TAGVER_LEN]; // 0-3: Version of the image tag
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char sig_1[SIG1_LEN]; // 4-23: Company Line 1
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char sig_2[SIG2_LEN]; // 24-37: Company Line 2
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char chipid[CHIPID_LEN]; // 38-43: Chip this image is for
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char boardid[BOARDID_LEN]; // 44-59: Board name
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char big_endian[ENDIANFLAG_LEN]; // 60-61: Map endianness -- 1 BE 0 LE
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char totalLength[IMAGE_LEN]; // 62-71: Total length of image
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char cfeAddress[ADDRESS_LEN]; // 72-83: Address in memory of CFE
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char cfeLength[IMAGE_LEN]; // 84-93: Size of CFE
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char flashImageStart[ADDRESS_LEN]; // 94-105: Address in memory of image start (kernel for OpenWRT, rootfs for stock firmware)
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char flashRootLength[IMAGE_LEN]; // 106-115: Size of rootfs for flashing
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char kernelAddress[ADDRESS_LEN]; // 116-127: Address in memory of kernel
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char kernelLength[IMAGE_LEN]; // 128-137: Size of kernel
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char dualImage[DUALFLAG_LEN]; // 138-139: Unused at present
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char inactiveFlag[INACTIVEFLAG_LEN]; // 140-141: Unused at present
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char rsa_signature[RSASIG_LEN]; // 142-161: RSA Signature (unused at present; some vendors may use this)
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char information1[TAGINFO1_LEN]; // 162-191: Compilation and related information (not generated/used by OpenWRT)
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char flashLayoutVer[FLASHLAYOUTVER_LEN];// 192-195: Version flash layout
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char fskernelCRC[CRC_LEN]; // 196-199: kernel+rootfs CRC32
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char information2[TAGINFO2_LEN]; // 200-215: Unused at present except Alice Gate where is is information
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char imageCRC[CRC_LEN]; // 216-219: CRC32 of image less imagetag (kernel for Alice Gate)
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char rootfsCRC[CRC_LEN]; // 220-223: CRC32 of rootfs partition
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char kernelCRC[CRC_LEN]; // 224-227: CRC32 of kernel partition
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char imageSequence[4]; // 228-231: Image sequence number
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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
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char headerCRC[CRC_LEN]; // 236-239: CRC32 of header excluding tagVersion
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char reserved2[16]; // 240-255: Unused at present
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};
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#endif /* __BCM63XX_TAG_H */
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