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bcm63xx: Move the OpenWrt rootfs length field

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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
This commit is contained in:
cshore
2011-04-15 12:18:25 +00:00
parent 1518b9d70c
commit f5c866b902
6 changed files with 7 additions and 40 deletions
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6
target/linux/brcm63xx/patches-2.6.37/041-bcm963xx_real_rootfs_length.patch
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@@ -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 */