----- Menuconfig -----

u-boot:
Boot options -> Boot images -> Enable support for Android Boot Images
Update support -> Android A/B updates
Library routines -> Android Verified Boot -> Android Verified Boot 2.0 support
Partition Types -> Enable Partition Labels (disklabels) support
Device Drivers -> MMC Host controller Support -> MMC/SD/SDIO card support
Security support -> Build Android Verified Boot operations
Security support -> Define AVB buffer address -> 0x10000000
Security support -> Define AVB buffer SIZE -> 0x200
Command line interface -> Android command support -> ab_select
Command line interface -> Debug commands -> avb

u-boot aosp:
Boot options -> Boot images -> Enable support for Android Boot Images
Init options -> Support for Android Bootloader boot flow
Init options -> Support for Android Recovery Flow on Android 10+ devices
Update support -> Android A/B updates
Library routines -> Android Verified Boot -> Android Verified Boot 2.0 support
Library routines -> Boot Configuration -> Boot Configuration support
Security support -> Build Android Verified Boot options
Command line interface -> Android command support -> ab_select
Command line interface -> Android command support -> boot_android
Command line interface -> Debug commands -> avd



----- Dev files -----

u-boot v2021.10:
/mnt/dev/linux/source/u-boot-v2021.10/include/log.h
/mnt/dev/linux/source/u-boot-v2021.10/include/configs/qemu-arm.h
/mnt/dev/linux/source/u-boot-v2021.10/include/config_distro_bootcmd.h
/mnt/dev/linux/source/u-boot-v2021.10/common/board_f.c
/mnt/dev/linux/source/u-boot-v2021.10/common/command.c
/mnt/dev/linux/source/u-boot-v2021.10/cmd/bootm.c
/mnt/dev/linux/source/u-boot-v2021.10/arch/arm/lib/bootm.c
/mnt/dev/linux/source/u-boot-v2021.10/include/image.h
/mnt/dev/linux/source/u-boot-v2021.10/common/image.c
/mnt/dev/linux/source/u-boot-v2021.10/arch/arm/include/asm/system.h
/mnt/dev/linux/source/u-boot-v2021.10/arch/arm/cpu/armv8/transition.S

u-boot aosp:
/mnt/dev/android/source/u-boot-master/include/log.h
/mnt/dev/android/source/u-boot-master/include/configs/qemu-arm.h
/mnt/dev/android/source/u-boot-master/include/config_distro_bootcmd.h
/mnt/dev/android/source/u-boot-master/common/board_f.c
/mnt/dev/android/source/u-boot-master/common/command.c
/mnt/dev/android/source/u-boot-master/cmd/bootm.c
/mnt/dev/android/source/u-boot-master/boot/bootm.c
/mnt/dev/android/source/u-boot-master/boot/image-board.c
/mnt/dev/android/source/u-boot-master/include/image.h
/mnt/dev/android/source/u-boot-master/boot/image.c
/mnt/dev/android/source/u-boot-master/boot/image-android.c



----- Other -----

printf( "@TDA: [%s:%d] -> \n", __FUNCTION__, __LINE__ );
do_bootm -> do_bootm_states -> bootm_start -> bootm_find_os -> bootm_find_other -> bootm_find_images -> boot_get_ramdisk