[U-Boot] [PATCH v3 3/5] x86: fsp: Make sure HOB list is not overwritten by U-Boot

[Bin Meng]

On Wed, Feb 17, 2016 at 4:16 PM, Bin Meng <bmeng.cn at gmail.com> wrote:
> Intel IvyBridge FSP seems to be buggy that it does not report memory
> used by FSP itself as reserved in the resource descriptor HOB. The
> FSP specification does not describe how resource descriptor HOBs are
> generated by the FSP to describe what memory regions. It looks newer
> FSPs like Queensbay and BayTrail do not have such issue. This causes
> U-Boot relocation overwrites the important boot service data which is
> used by FSP, and the subsequent call to fsp_notify() will fail.
>
> To resolve this, we find out the lowest memory base address allocated
> by FSP for the boot service data when walking through the HOB list in
> fsp_get_usable_lowmem_top(). Check whether the memory top address is
> below the FSP HOB list, and if not, use the lowest memory base address
> allocated by FSP as the memory top address.
>
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> Tested on link (ivybridge non-FSP)
> Tested-by: Simon Glass <sjg at chromium.org>
>
> ---

applied to u-boot-x86/master, thanks!