Hi Alex,
It's great for this patch set which able to support full android
boot flow,
there was no support for parse misc and enter recovery in U-Boot mainline.
Do you have a public tree or more detail step by step document, I want
to test this patch set on my board.
Thanks,
- Kever
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
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