mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 08:59:33 +00:00
d5c4ec4aa3
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 <dsankouski@gmail.com> |
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| .. | ||
| actions | ||
| advantech | ||
| allwinner | ||
| amlogic | ||
| AndesTech | ||
| apple | ||
| armltd | ||
| atmel | ||
| broadcom | ||
| congatec | ||
| coreboot | ||
| emulation | ||
| highbank | ||
| intel | ||
| kontron | ||
| microchip | ||
| nokia | ||
| nxp | ||
| openpiton | ||
| qualcomm | ||
| rockchip | ||
| samsung | ||
| siemens | ||
| sifive | ||
| sipeed | ||
| socionext | ||
| st | ||
| ste | ||
| tbs | ||
| ti | ||
| toradex | ||
| variscite | ||
| xen | ||
| xilinx | ||
| index.rst | ||