u-boot.git/arch/arm/lib/save_prev_bl_data.c, branch v2023.01Unnamed repository; edit this file 'description' to name the repository.http://cgit.235523.xyz/u-boot.git/atom/arch/arm/lib/save_prev_bl_data.c?h=v2023.012022-04-04T18:53:26Zarm: init: save previous bootloader data2022-04-04T18:53:26ZDzmitry Sankouskidsankouski@gmail.com2022-02-22T18:49:52Zurn:sha1:12a3e1ada06c702c403cf1eebb063ef7a34688cd
When u-boot is used as a chain-loaded bootloader (replacing OS kernel),
previous bootloader leaves data in RAM, that can be reused.
For example, on recent arm linux system, when chainloading u-boot,
there are initramfs and fdt in RAM prepared for OS booting. Initramfs
may be modified to store u-boot's payload, thus providing the ability to
use chainloaded u-boot to boot OS without any storage support.
Two config options added:
- SAVE_PREV_BL_INITRAMFS_START_ADDR
saves initramfs start address to 'prevbl_initrd_start_addr' environment
variable
- SAVE_PREV_BL_FDT_ADDR
saves fdt address to 'prevbl_fdt_addr' environment variable
Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Cc: Tom Rini <trini@konsulko.com>