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| author | Dzmitry Sankouski <dsankouski@gmail.com> | 2022-02-22 21:49:52 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-04-04 14:53:26 -0400 |
| commit | 12a3e1ada06c702c403cf1eebb063ef7a34688cd (patch) | |
| tree | d58972054d39b90b0b0a92d5c9b093d0547264a6 /common | |
| parent | 5c9b420ada3b4f2a08da4789571f0ea373881565 (diff) | |
| download | u-boot-12a3e1ada06c702c403cf1eebb063ef7a34688cd.zip u-boot-12a3e1ada06c702c403cf1eebb063ef7a34688cd.tar.gz u-boot-12a3e1ada06c702c403cf1eebb063ef7a34688cd.tar.bz2 | |
arm: init: save previous bootloader data
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>
Diffstat (limited to 'common')
| -rw-r--r-- | common/board_r.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/common/board_r.c b/common/board_r.c index b92c1bb..8dc87ed 100644 --- a/common/board_r.c +++ b/common/board_r.c @@ -445,6 +445,11 @@ static int initr_env(void) env_set_hex("fdtcontroladdr", (unsigned long)map_to_sysmem(gd->fdt_blob)); + #if (CONFIG_IS_ENABLED(SAVE_PREV_BL_INITRAMFS_START_ADDR) || \ + CONFIG_IS_ENABLED(SAVE_PREV_BL_FDT_ADDR)) + save_prev_bl_data(); + #endif + /* Initialize from environment */ image_load_addr = env_get_ulong("loadaddr", 16, image_load_addr); |