On Thu, Sep 21, 2017 at 10:37:57PM +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) > ======================================================================= > > 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>
Reviewed-by: Tom Rini <tr...@konsulko.com> -- Tom
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