[Buildroot] [PATCH] cubieboard2: Accommodate U-Boot environment on SD-card

Peter Korsgaard peter at korsgaard.com
Sat Jul 2 11:07:25 UTC 2016


>>>>> "Alexey" == Alexey Brodkin <Alexey.Brodkin at synopsys.com> writes:

 > According to current "include/configs/sunxi-common.h"
 > U-Boot environment is stored on SD-card with offset 544 kB
 > and its size is limited as 128 kB.

 > Given memory layout of sunxi boards:
 >   1. SPL
 >   2. U-Boot
 >   3. U-Boot environment
 >   4. Partitions
 > we need to make sure the first real partition starts at least
 > with 544+128 kB offset. Adding a small safety gap let's put
 > the first partition with offset 1Mb from the beginning of SD-card.

 > Otherwise current setup gets broken as soon as one saves U-Boot
 > environment with "saveenv" which basically overwrites FAT partition with
 > zImage and board no longer boots into Linux kernel.

 > Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
 > Cc: Erico Nunes <nunes.erico at gmail.com>
 > Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
 > Cc: Peter Korsgaard <peter at korsgaard.com>
 > Cc: Carlos Quijano <carlos at crqgestion.es>
 > Cc: Andi Shyti <andi at etezian.org>
 > ---
 >  board/cubietech/cubieboard2/genimage.cfg | 1 +
 >  1 file changed, 1 insertion(+)

 > diff --git a/board/cubietech/cubieboard2/genimage.cfg b/board/cubietech/cubieboard2/genimage.cfg
 > index 8929a72..cde78e1 100644
 > --- a/board/cubietech/cubieboard2/genimage.cfg
 > +++ b/board/cubietech/cubieboard2/genimage.cfg
 > @@ -26,6 +26,7 @@ image sdcard.img {
 >  		partition-type = 0xC
 >  		bootable = "true"
 >  		image = "boot.vfat"
 > +		offset = 1048576

Thanks. I prefer to add the padding to the u-boot "partition", as that
is logically where it belongs, so I've instead set the size of that one
to 1MB - 8K, and committed - Thanks.

We need to do the same for the other sunxi boards as well. I'll do so
now.

-- 
Venlig hilsen,
Peter Korsgaard 


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