On Fri, May 1, 2020 at 9:36 PM Simon Glass sjg@chromium.org wrote:
Coreboot is a first-stage bootloader mostly used on x86 devices as an alternative to UEFI. Coreboot runs in 32-bit mode.
U-Boot currently supports booting from coreboot as a second-stage bootloader, also in 32-bit mode. However it is useful to be able to run U-Boot in 64-bit mode. To do this we can have a 32-bit SPL which switches over the CPU and jumps to a 64-bit U-Boot proper.
Add a new 'coreboot64' board for running 64-bit U-Boot from coreboot. This uses binman to create an image with a 32-bit SPL and a 64-bit U-Boot.
This allows running 64-bit EFI images on x86, for example, without needing a native U-Boot port for a board.
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v5:
- Rewrite commit message to explain what coreboot is
board/coreboot/coreboot/MAINTAINERS | 7 +++++ configs/coreboot64_defconfig | 48 +++++++++++++++++++++++++++++ doc/board/coreboot/coreboot.rst | 10 ++++++ 3 files changed, 65 insertions(+) create mode 100644 configs/coreboot64_defconfig
applied to u-boot-x86, thanks!