Eric Lee / smarc-uboot

04 Feb, 2020

1 commit

  • 94f6d0d1b   cmd: abootimg: Add abootimg command ... Browse Code ยป

    This command can be used to extract fields and image payloads from
    Android Boot Image. It can be used for example to implement boot flow
    where dtb is taken from boot.img (as v2 incorporated dtb inside of
    boot.img). Using this command, one can obtain needed dtb blob from
    boot.img in scripting manner, and then apply needed dtbo's (from "dtbo"
    partition) on top of that, providing then the resulting image to bootm
    command in order to boot the Android.

    Also right now this command has the sub-command to get an address and
    size of recovery dtbo from recovery image (for non-A/B devices only,
    see [1,2] for details).

    It can be tested like this:

    => mmc dev 1
    => part start mmc 1 boot_a boot_start
    => part size mmc 1 boot_a boot_size
    => mmc read $loadaddr $boot_start $boot_size
    => abootimg get ver
    => abootimg dump dtb

    [1] https://source.android.com/devices/bootloader/boot-image-header
    [2] https://source.android.com/devices/architecture/dto/partitions

    Signed-off-by: Sam Protsenko
    Signed-off-by: Lokesh Vutla

    Sam Protsenko