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125d9f3306
Android boot flow is a bit different than a regular Linux distro. Android relies on multiple partitions in order to boot. A typical boot flow would be: 1. Parse the Bootloader Control Block (BCB, misc partition) 2. If BCB requested bootonce-bootloader, start fastboot and wait. 3. If BCB requested recovery or normal android, run the following: 3.a. Get slot (A/B) from BCB 3.b. Run AVB (Android Verified Boot) on boot partitions 3.c. Load boot and vendor_boot partitions 3.d. Load device-tree, ramdisk and boot The AOSP documentation has more details at [1], [2], [3] This has been implemented via complex boot scripts such as [4]. However, these boot script are neither very maintainable nor generic. Moreover, DISTRO_DEFAULTS is being deprecated [5]. Add a generic Android bootflow implementation for bootstd. For this initial version, only boot image v4 is supported. [1] https://source.android.com/docs/core/architecture/bootloader [2] https://source.android.com/docs/core/architecture/partitions [3] https://source.android.com/docs/core/architecture/partitions/generic-boot [4] https://source.denx.de/u-boot/u-boot/-/blob/master/include/configs/meson64_android.h [5] https://lore.kernel.org/r/all/20230914165615.1058529-17-sjg@chromium.org/ Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Julien Masson <jmasson@baylibre.com> Tested-by: Guillaume La Roque <glaroque@baylibre.com> Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> |
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| .. | ||
| devicetree | ||
| driver-model | ||
| package | ||
| pics | ||
| statistics | ||
| uefi | ||
| bloblist.rst | ||
| board_best_practices.rst | ||
| bootstd.rst | ||
| cedit.rst | ||
| checkpatch.rst | ||
| ci_testing.rst | ||
| coccinelle.rst | ||
| codingstyle.rst | ||
| commands.rst | ||
| config_binding.rst | ||
| crash_dumps.rst | ||
| cyclic.rst | ||
| designprinciples.rst | ||
| directories.rst | ||
| distro.rst | ||
| docstyle.rst | ||
| environment.rst | ||
| event.rst | ||
| expo.rst | ||
| falcon.rst | ||
| gdb.rst | ||
| global_data.rst | ||
| ide_integration.rst | ||
| index.rst | ||
| logging.rst | ||
| makefiles.rst | ||
| menus.rst | ||
| patman.rst | ||
| printf.rst | ||
| process.rst | ||
| py_testing.rst | ||
| python_cq.rst | ||
| qconfig.rst | ||
| release_cycle.rst | ||
| security.rst | ||
| sending_patches.rst | ||
| smbios.rst | ||
| spl.rst | ||
| system_configuration.rst | ||
| testing.rst | ||
| tests_sandbox.rst | ||
| tests_writing.rst | ||
| trace.rst | ||
| vbe.rst | ||
| version.rst | ||