Re: [PATCH v4 8/9] x86: Use the existing stack when chain-loading

On Sun, Apr 26, 2020 at 11:13 PM Simon Glass sjg@chromium.org wrote:

With chromebook_coral we normally run TPL->SPL->U-Boot. This is the 'bare metal' case.

When running from coreboot we put u-boot.bin in the RW_LEGACY portion of the image, e.g. with:

cbfstool image-coral.serial.bin add-flat-binary -r RW_LEGACY \ -f /tmp/b/chromebook_coral/u-boot.bin -n altfw/u-boot \ -c lzma -l 0x1110000 -e 0x1110000

In this case U-Boot is run from coreboot (actually Depthcharge, its payload) so we cannot access CAR. Use the existing stack instead.

Signed-off-by: Simon Glass sjg@chromium.org

Changes in v4:

• Update to use locate_coreboot_table()

Changes in v3: None Changes in v2: None

arch/x86/cpu/start_from_spl.S | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)

Reviewed-by: Bin Meng bmeng.cn@gmail.com