u-boot-brain/arch
Simon Glass e5aa8a9b15 x86: Support a chained-boot development flow
Sometimes it is useful to jump into U-Boot directly from coreboot or UEFI
without any 16-bit init. This can help during development by allowing U-Boot
to avoid doing all the init required by the platform.

U-Boot expects its GDT to be set up correctly by its 16-bit code. If
coreboot doesn't do this (because it hasn't run the payload setup code yet)
then this won't happen.

In this case we cannot rely on the GDT settings. U-Boot will hang or crash
if these are wrong. Provide a development-only option to set up the GDT
correctly. This is just a hack so you can jump to U-Boot from any stage of
coreboot, not just at the end.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-03-17 10:27:27 +08:00
..
arc arc: cache - utilize IO coherency (AKA IOC) engine 2016-02-20 11:20:05 +03:00
arm arm: Add a 64-bit division routine to the private library 2016-03-17 10:27:27 +08:00
avr32
blackfin Use correct spelling of "U-Boot" 2016-02-06 12:00:59 +01:00
m68k m68k: M54418TWR: drop board/freescale/m54418twr/config.mk 2016-01-20 10:19:34 -05:00
microblaze Kconfig: Move CONFIG_FIT and related options to Kconfig 2016-03-14 19:18:07 -04:00
mips MIPS: fix mips_cache fallback without __builtin_mips_cache 2016-03-09 11:00:40 +01:00
nds32 Use correct spelling of "U-Boot" 2016-02-06 12:00:59 +01:00
nios2 dm: Use uclass_first_device_err() where it is useful 2016-03-14 15:34:50 -06:00
openrisc openrisc: Fix build errors 2016-01-25 10:40:01 -05:00
powerpc Kconfig: Move CONFIG_FIT and related options to Kconfig 2016-03-14 19:18:07 -04:00
sandbox sandbox: Fix building with LLVM 2016-03-08 15:01:46 -05:00
sh
sparc Use correct spelling of "U-Boot" 2016-02-06 12:00:59 +01:00
x86 x86: Support a chained-boot development flow 2016-03-17 10:27:27 +08:00
.gitignore
Kconfig