Hi Alex, The Android A/B bootloader patch series looks good.
How far along are you to have this work integrated ? Regards, Stan On 04/02/2017 04:49 PM, Alex Deymo wrote: > An "Android Bootloader" has a lot of requirements about how it should > behave which Android partners must implement. In particular, the new > A/B updates [1] added more requirements and flows to the bootloader > which are not common, on top of the existing flows. > > For example, a few uncommon requirements include: > * Lookup in the BCB (boot control block) whether a "recovery" message > is stored. This is used by the recovery environment when applying a > multi-stage update in the legacy update model (recovery reboots to > recovery again) and for interrumpted factory-reset (a reboot during > the factory reset should continue to reboot into factory reset until > it is done). > * A new "repair" mode. In the A/B model, when none of the slots is > bootable, the device would boot into repair mode, which is often the > same as "bootloader" mode (fastboot). > * Recovery as root: In newer version of AOSP, it is possible to mount > the system image as / without an initramfs, which then frees up the > initramfs in the "boot" partition to hold the "recovery" initramfs. > This is the default for new devices and required for the A/B setup. > > This patchset updates the Android-related headers and introduces new > commands to boot a recent Android build. This work is based on the > bootloader used in the Raspberry Pi in Android Things and extensively > tested there. > > [1] https://source.android.com/devices/tech/ota/ab_updates.html > > > Alex Deymo (6): > image: Update include/android_image.h > image: Implement a function to load Android Images. > cmd: Add 'load_android' command to load Android images. > disk: Return the partition number in part_get_info_by_name() > Initial support for the Android Bootloader flow > cmd: Add "boot_android" command. > > README | 25 ++- > cmd/Kconfig | 19 ++ > cmd/Makefile | 2 + > cmd/boot_android.c | 126 +++++++++++++ > cmd/load_android.c | 56 ++++++ > common/Kconfig | 19 ++ > common/Makefile | 1 + > common/android_bootloader.c | 350 > +++++++++++++++++++++++++++++++++++ > common/fb_mmc.c | 6 +- > common/image-android.c | 60 ++++++ > disk/part.c | 2 +- > include/android_bootloader.h | 48 +++++ > include/android_bootloader_message.h | 174 +++++++++++++++++ > include/android_image.h | 24 ++- > include/image.h | 19 ++ > include/part.h | 3 +- > 16 files changed, 920 insertions(+), 14 deletions(-) > create mode 100644 cmd/boot_android.c > create mode 100644 cmd/load_android.c > create mode 100644 common/android_bootloader.c > create mode 100644 include/android_bootloader.h > create mode 100644 include/android_bootloader_message.h > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
