arm: dra7xx: Fix Linux boot from eMMC
Right now on OMAP5-based boards we have only one partition defined for
Linux boot, which is rootfs. That doesn't work with bootpart=1:2 (that
is defined in include/environment/ti/boot.h). To fix Linux boot we may
either:
1. Change bootpart to be 1:1
2. Or add preceding partition, so that rootfs is actually 1:2
Second choice seems more reasonable, as DFU is already using similar
partition table and can rely on bootpart to be 1:2.
This patch adds "bootloader" partition. So now eMMC layout for Linux
boot looks like this:
offset content size partition
(KiB) (KiB)
Reviewed-by: Tom Rini <trini@konsulko.com>
=======================================================================
0 +--------------------------------+
| MBR/GPT header | 128 -
128 +--------------------------------+
| MLO | 256 -
384 +--------------------------------+
| u-boot.img | 1792 bootloader
2176 +--------------------------------+
| //////////// hole //////////// | 256 -
2432 +--------------------------------+
| U-Boot environment | 128 -
2560 +--------------------------------+
| U-Boot environment (redundant) | 128 -
2688 +--------------------------------+
| rootfs | remaining rootfs
end +--------------------------------+
=======================================================================
Guard hole appears because U-Boot environment offset was calculated for
Android partition table, which has two additional partitions in place of
that hole ("environment" and "misc" partitions).
This patch also changes rootfs offset from 2 MiB further to 2688 KiB,
so that there won't be any collisions with U-Boot environment when we
flash rootfs.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
1 file changed