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kernel: mtdsplit: Add support for Mikrotik NOR firmware

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The RouterBOOT bootloader does not care where the kernel lives in the SPI
flash, all that matters is that the kernel is wrapped in the custom yaffs
container as generated by kernel2minor.

This container has a fixed signature as follows:
00000000  00 00 00 01 00 00 00 01  ff ff 6b 65 72 6e 65 6c  |..........kernel|

This patch adds mtdsplit support for identifying that signature and
triggering the search for the rootfs. rootfs is expected at EB boundary since
we use wget mtd_find_rootfs_from(). We make no use of the yaffs file size
field because it contains invalid data in the image generated by kernel2minor.

Signed-off-by: Thibaut VARENE <hacks@slashdirt.org>
This commit is contained in:
Thibaut VARENE
2017-02-14 14:42:10 +01:00
committed by Felix Fietkau
parent 2c8cb0c572
commit 890daca9e2
5 changed files with 125 additions and 0 deletions
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target/linux/generic/files/drivers/mtd/mtdsplit/Makefile
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@@ -9,3 +9,4 @@ obj-$(CONFIG_MTD_SPLIT_TRX_FW) += mtdsplit_trx.o
obj-$(CONFIG_MTD_SPLIT_BRNIMAGE_FW) += mtdsplit_brnimage.o
obj-$(CONFIG_MTD_SPLIT_EVA_FW) += mtdsplit_eva.o
obj-$(CONFIG_MTD_SPLIT_WRGG_FW) += mtdsplit_wrgg.o
obj-$(CONFIG_MTD_SPLIT_MINOR_FW) += mtdsplit_minor.o