diff options
Diffstat (limited to 'target/linux/brcm63xx/files/arch')
| -rw-r--r-- | target/linux/brcm63xx/files/arch/mips/include/asm/mach-bcm63xx/bcm_tag.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/files/arch/mips/include/asm/mach-bcm63xx/bcm_tag.h b/target/linux/brcm63xx/files/arch/mips/include/asm/mach-bcm63xx/bcm_tag.h new file mode 100644 index 000000000..2730edc9a --- /dev/null +++ b/target/linux/brcm63xx/files/arch/mips/include/asm/mach-bcm63xx/bcm_tag.h @@ -0,0 +1,70 @@ +#ifndef __BCM63XX_TAG_H +#define __BCM63XX_TAG_H + +#define TAGVER_LEN 4 /* Length of Tag Version */ +#define TAGLAYOUT_LEN 4 /* Length of FlashLayoutVer */ +#define SIG1_LEN 20 /* Company Signature 1 Length */ +#define SIG2_LEN 14 /* Company Signature 2 Lenght */ +#define BOARDID_LEN 16 /* Length of BoardId */ +#define ENDIANFLAG_LEN 2 /* Endian Flag Length */ +#define CHIPID_LEN 6 /* Chip Id Length */ +#define IMAGE_LEN 10 /* Length of Length Field */ +#define ADDRESS_LEN 12 /* Length of Address field */ +#define DUALFLAG_LEN 2 /* Dual Image flag Length */ +#define INACTIVEFLAG_LEN 2 /* Inactie Flag Length */ +#define RSASIG_LEN 20 /* Length of RSA Signature in tag */ +#define TAGINFO1_LEN 30 /* Length of vendor information field1 in tag */ +#define FLASHLAYOUTVER_LEN 4 /* Length of Flash Layout Version String tag */ +#define TAGINFO2_LEN 16 /* Length of vendor information field2 in tag */ +#define CRC_LEN 4 /* Length of CRC in bytes */ +#define ALTTAGINFO_LEN 54 /* Alternate length for vendor information; Pirelli */ + +#define NUM_PIRELLI 2 +#define IMAGETAG_CRC_START 0xFFFFFFFF + +#define PIRELLI_BOARDS { \ + "AGPF-S0", \ + "DWV-S0", \ +} + +/* + * The broadcom firmware assumes the rootfs starts the image, + * therefore uses the rootfs start (flashImageAddress) + * to determine where to flash the image. Since we have the kernel first + * we have to give it the kernel address, but the crc uses the length + * associated with this address (rootLength), which is added to the kernel + * length (kernelLength) to determine the length of image to flash and thus + * needs to be rootfs + deadcode (jffs2 EOF marker) +*/ + +struct bcm_tag { + char tagVersion[TAGVER_LEN]; // 0-3: Version of the image tag + char sig_1[SIG1_LEN]; // 4-23: Company Line 1 + char sig_2[SIG2_LEN]; // 24-37: Company Line 2 + char chipid[CHIPID_LEN]; // 38-43: Chip this image is for + char boardid[BOARDID_LEN]; // 44-59: Board name + char big_endian[ENDIANFLAG_LEN]; // 60-61: Map endianness -- 1 BE 0 LE + char totalLength[IMAGE_LEN]; // 62-71: Total length of image + char cfeAddress[ADDRESS_LEN]; // 72-83: Address in memory of CFE + char cfeLength[IMAGE_LEN]; // 84-93: Size of CFE + char flashImageStart[ADDRESS_LEN]; // 94-105: Address in memory of image start (kernel for OpenWRT, rootfs for stock firmware) + char flashRootLength[IMAGE_LEN]; // 106-115: Size of rootfs for flashing + char kernelAddress[ADDRESS_LEN]; // 116-127: Address in memory of kernel + char kernelLength[IMAGE_LEN]; // 128-137: Size of kernel + char dualImage[DUALFLAG_LEN]; // 138-139: Unused at present + char inactiveFlag[INACTIVEFLAG_LEN]; // 140-141: Unused at present + char rsa_signature[RSASIG_LEN]; // 142-161: RSA Signature (unused at present; some vendors may use this) + char information1[TAGINFO1_LEN]; // 162-191: Compilation and related information (not generated/used by OpenWRT) + char flashLayoutVer[FLASHLAYOUTVER_LEN];// 192-195: Version flash layout + char fskernelCRC[CRC_LEN]; // 196-199: kernel+rootfs CRC32 + char information2[TAGINFO2_LEN]; // 200-215: Unused at present except Alice Gate where is is information + char imageCRC[CRC_LEN]; // 216-219: CRC32 of image less imagetag (kernel for Alice Gate) + char rootfsCRC[CRC_LEN]; // 220-223: CRC32 of rootfs partition + char kernelCRC[CRC_LEN]; // 224-227: CRC32 of kernel partition + char imageSequence[4]; // 228-231: Image sequence number + 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 + char headerCRC[CRC_LEN]; // 236-239: CRC32 of header excluding tagVersion + char reserved2[16]; // 240-255: Unused at present +}; + +#endif /* __BCM63XX_TAG_H */ |