[U-Boot] [PATCH] powerpc/mpc85xx: Use GOT when loading IVORs post-relocation

[Shaohui Xie]

> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Friday, April 24, 2015 9:02 AM
> To: u-boot at lists.denx.de; Sun York-R58495
> Cc: Wood Scott-B07421; Alexander Graf; Xie Shaohui-B21989
> Subject: [PATCH] powerpc/mpc85xx: Use GOT when loading IVORs post-
> relocation
> 
> Commit 96d2bb952bb ("powerpc/mpc85xx: Don't relocate exception vectors")
> simplified IVOR initialization a bit too much, failing to use the post-
> relocation offset.  This doesn't cause a problem with normal NOR boot, in
> which both the pre-relocation and post-relocation addresses are 64 KiB
> aligned.  However, if TEXT_BASE is only 4 KiB aligned, such as for
> NAND/SD/etc. boot on some targets, as well as the QEMU target, the post-
> relocation address will not be the same in the lower 16 bits, as
> reserve_uboot() ensures that the relocation address is always 64 KiB
> aligned even if the pre-relocation address was not.
> 
> Use the GOT to get the proper post-relocation offsets.
> 
> Fixes: 96d2bb952bb ("powerpc/mpc85xx: Don't relocate exception vectors")
> Signed-off-by: Scott Wood <scottwood at freescale.com>
> Cc: Alexander Graf <agraf at suse.de>
> Cc: Shaohui Xie <Shaohui.Xie at freescale.com>
> ---
>  arch/powerpc/cpu/mpc85xx/start.S | 35 ++++++++++++++++++++--------------
> -
>  1 file changed, 20 insertions(+), 15 deletions(-)
> 

Tested-by: Shaohui Xie <Shaohui.Xie at freescale.com>