diff options
| author | Joshua Watt | 2023-07-03 10:07:13 -0500 |
|---|---|---|
| committer | Tom Rini | 2023-07-17 16:20:08 -0400 |
| commit | 3430f24bc69d61eadf5b09999d58c468ac67c9fe (patch) | |
| tree | 2be4c8232f5cb3637da9c7cc501f3c8eb9d8f3f0 /doc/android | |
| parent | 55a424437226f9ef50c3e829dafa6b494377d018 (diff) | |
android_ab: Try backup booloader_message
Some devices keep 2 copies of the bootloader_message in the misc
partition and write each in sequence when updating. This ensures that
there is always one valid copy of the bootloader_message. Teach u-boot
to optionally try a backup bootloader_message from a specified offset if
the primary one fails its CRC check.
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Diffstat (limited to 'doc/android')
| -rw-r--r-- | doc/android/ab.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/android/ab.rst b/doc/android/ab.rst index 961895c32e8..2adf88781d6 100644 --- a/doc/android/ab.rst +++ b/doc/android/ab.rst @@ -31,6 +31,12 @@ boot script. This command analyzes and processes A/B metadata stored on a special partition (e.g. ``misc``) and determines which slot should be used for booting up. +If the A/B metadata partition has a backup bootloader_message block that is used +to ensure one is always valid even in the event of interruption when writing, it +can be enabled in your board configuration file:: + + CONFIG_ANDROID_AB_BACKUP_OFFSET=0x1000 + Command usage ------------- |