diff options
| author | Dzmitry Sankouski <[email protected]> | 2022-02-22 21:49:54 +0300 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-04-04 19:02:03 -0400 |
| commit | d5c4ec4aa3aaa833cb535daa64a583a14304fc95 (patch) | |
| tree | 0d5106a3e30ded64eed021c762039b48c8378e99 /include | |
| parent | f8a1b33889a2ed880062d9960a68718463093de6 (diff) | |
board: axy17lte: get board usable - add bootcmd and docs
U-boot is intended to replace linux kernel in android boot image(ABL), and
it's FIT payload to replace initramfs file. The boot process is similar to
boot image with linux:
- android bootloader (ABL) unpacks android boot image
- ABL sets `linux,initrd-start property` in chosen node in unpacked FDT
- ABL sets x0 register to FDT address, and passes control to u-boot
- u-boot reads x0 register, and stores it in `prevbl_fdt_addr` env variable
- u-boot reads `linux,initrd-start` property,
and stores it in `prevbl_initrd_start_addr`
In this way, u-boot bootcmd relies on `prevbl_initrd_start_addr` env
variable, and boils down to `bootm $prevbl_initrd_start_addr`.
If more control on boot process is desired, pack a boot script in
FIT image, and put it to default configuration
What done:
- Rearrange defconfig option order
- Add CONFIG_SAVE_PREV_BL_* options
- Doc updates:
- remove wrong SBOOT memory corruption note, because
memory is changed during u-boot bringup process,
not by SBOOT
- put payload on ramdisk place in abl boot image
creation step
Signed-off-by: Dzmitry Sankouski <[email protected]>
Diffstat (limited to 'include')
| -rw-r--r-- | include/configs/exynos78x0-common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/configs/exynos78x0-common.h b/include/configs/exynos78x0-common.h index 53396aa4229..457057ce71f 100644 --- a/include/configs/exynos78x0-common.h +++ b/include/configs/exynos78x0-common.h @@ -35,6 +35,7 @@ #define CONFIG_SYS_SDRAM_BASE 0x40000000 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_TEXT_BASE + SZ_2M - GENERATED_GBL_DATA_SIZE) +#define CONFIG_SYS_BOOTM_LEN SZ_32M /* DRAM Memory Banks */ #define SDRAM_BANK_SIZE (256UL << 20UL) /* 256 MB */ #define PHYS_SDRAM_1 CONFIG_SYS_SDRAM_BASE @@ -79,7 +80,10 @@ #define EXYNOS_FDTFILE_SETTING #endif +/* Cannot use bootdelay > 0, because timer is not working */ #define EXTRA_ENV_SETTINGS \ + "bootdelay=0\0" \ + "bootcmd=source $prevbl_initrd_start_addr:bootscript\0" \ EXYNOS_DEVICE_SETTINGS \ EXYNOS_FDTFILE_SETTING \ MEM_LAYOUT_ENV_SETTINGS |