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| author | Daniel Dickinson <daniel@cshore.neomailbox.net> | 2011-04-15 12:18:25 +0000 |
|---|---|---|
| committer | Daniel Dickinson <daniel@cshore.neomailbox.net> | 2011-04-15 12:18:25 +0000 |
| commit | b2ae50ed2791c7ca9ee1d4592259829e0941f9c3 (patch) | |
| tree | be3eed32a0f0f4abc6895b3890ee1276d15d3a42 /target | |
| parent | 9c505aa1f616514d031341e6fb1d2262b506a9d3 (diff) | |
| download | master-187ad058-b2ae50ed2791c7ca9ee1d4592259829e0941f9c3.tar.gz master-187ad058-b2ae50ed2791c7ca9ee1d4592259829e0941f9c3.tar.bz2 master-187ad058-b2ae50ed2791c7ca9ee1d4592259829e0941f9c3.zip | |
bcm63xx: Move the OpenWrt rootfs length field
Dual image capable CFEs store an image sequence at the same place as
currently OpenWrt stores the actual rootfs length, so it will get
overwritten when flashing through such a CFE.
To prevent this from happening, move the rootfs length field to the next
four bytes, thus completely using the reserved1 field.
Since the reserved1 field is now completely in use, it does not make sense
to allow it to be set from the imagetag utility, so remove the option.
Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26680 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/brcm63xx/files/arch/mips/include/asm/mach-bcm63xx/bcm_tag.h | 4 | ||||
| -rw-r--r-- | target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch | 6 |
2 files changed, 5 insertions, 5 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 index 89650d1ea3..2730edc9ad 100644 --- 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 @@ -61,8 +61,8 @@ struct bcm_tag { 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 rootLength[4]; // 228-231: 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 reserved1[4]; // 232-235: Unused at present + 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 }; diff --git a/target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch b/target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch index cde2b92233..dccd36f4a1 100644 --- a/target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch +++ b/target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch @@ -6,10 +6,10 @@ char kernel_crc[CRC_LEN]; - /* 228-235: Unused at present */ - char reserved1[8]; -+ /* 228-231: OpenWrt: real rootfs length */ ++ /* 228-231: Image sequence number */ ++ char image_sequence[4]; ++ /* 222-235: Openwrt: real rootfs length */ + char real_rootfs_length[4]; -+ /* 222-235: Unused at present */ -+ char reserved1[4]; /* 236-239: CRC32 of header excluding tagVersion */ char header_crc[CRC_LEN]; /* 240-255: Unused at present */ |