u-boot-brain/arch/x86/cpu
Simon Glass d1cd045982 x86: Emit post codes in startup code for Chromebooks
On x86 it is common to use 'post codes' which are 8-bit hex values emitted
from the code and visible to the user. Traditionally two 7-segment displays
were made available on the motherboard to show the last post code that was
emitted. This allows diagnosis of a boot problem since it is possible to
see where the code got to before it died.

On modern hardware these codes are not normally visible. On Chromebooks
they are displayed by the Embedded Controller (EC), so it is useful to emit
them. We must enable this feature for the EC to see the codes, so add an
option for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-21 07:34:11 +01:00
..
coreboot x86: Emit post codes in startup code for Chromebooks 2014-11-21 07:34:11 +01:00
ivybridge x86: Add chromebook_link board 2014-11-21 07:34:11 +01:00
call64.S x86: Add support for starting 64-bit kernel 2014-10-28 20:43:47 -06:00
config.mk kconfig: delete redundant CONFIG_${ARCH} definition 2014-07-30 14:42:02 -04:00
cpu.c x86: Replace fill_processor_name() with cpu_get_name() 2014-11-21 07:24:12 +01:00
interrupts.c x86: Fix up some missing prototypes 2014-11-21 07:24:09 +01:00
Makefile x86: Add support for starting 64-bit kernel 2014-10-28 20:43:47 -06:00
resetvec.S Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
start16.S x86: Save the BIST value on reset 2014-11-21 07:24:10 +01:00
start.S x86: Emit post codes in startup code for Chromebooks 2014-11-21 07:34:11 +01:00
u-boot.lds Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00