On Thu, Sep 21, 2017 at 10:37:56PM +0300, Sam Protsenko wrote:
> 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 <tr...@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.protse...@linaro.org>Applied to u-boot/master, thanks! -- Tom
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