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https://github.com/u-boot/u-boot.git
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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>
70 lines
2.6 KiB
Makefile
70 lines
2.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2004-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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ifndef CONFIG_SPL_BUILD
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obj-$(CONFIG_BOOT_RETRY) += bootretry.o
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obj-$(CONFIG_CMD_BOOTM) += bootm.o bootm_os.o
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obj-$(CONFIG_CMD_BOOTZ) += bootm.o bootm_os.o
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obj-$(CONFIG_CMD_BOOTI) += bootm.o bootm_os.o
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obj-$(CONFIG_PXE_UTILS) += pxe_utils.o
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obj-$(CONFIG_QFW) += bootmeth_qfw.o
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endif
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obj-y += image.o image-board.o
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obj-$(CONFIG_ANDROID_AB) += android_ab.o
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obj-$(CONFIG_ANDROID_BOOT_IMAGE) += image-android.o image-android-dt.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootdev-uclass.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootflow.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootmeth-uclass.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootstd-uclass.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD_PROG) += prog_boot.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EXTLINUX) += bootmeth_extlinux.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EXTLINUX_PXE) += bootmeth_pxe.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EFILOADER) += bootmeth_efi.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_CROS) += bootm.o bootm_os.o bootmeth_cros.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_SANDBOX) += bootmeth_sandbox.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_SCRIPT) += bootmeth_script.o
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obj-$(CONFIG_$(SPL_TPL_)CEDIT) += cedit.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EFI_BOOTMGR) += bootmeth_efi_mgr.o
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ifdef CONFIG_$(SPL_TPL_)BOOTSTD_FULL
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obj-$(CONFIG_$(SPL_TPL_)EXPO) += bootflow_menu.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootflow_menu.o
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endif
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obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += fdt_support.o
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obj-$(CONFIG_$(SPL_TPL_)FDT_SIMPLEFB) += fdt_simplefb.o
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obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += image-fdt.o
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obj-$(CONFIG_$(SPL_TPL_)FIT_SIGNATURE) += fdt_region.o
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obj-$(CONFIG_$(SPL_TPL_)FIT) += image-fit.o
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obj-$(CONFIG_$(SPL_)MULTI_DTB_FIT) += boot_fit.o common_fit.o
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obj-$(CONFIG_$(SPL_TPL_)IMAGE_PRE_LOAD) += image-pre-load.o
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obj-$(CONFIG_$(SPL_TPL_)IMAGE_SIGN_INFO) += image-sig.o
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obj-$(CONFIG_$(SPL_TPL_)FIT_SIGNATURE) += image-fit-sig.o
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obj-$(CONFIG_$(SPL_TPL_)FIT_CIPHER) += image-cipher.o
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obj-$(CONFIG_CMD_ADTIMG) += image-android-dt.o
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ifdef CONFIG_SPL_BUILD
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obj-$(CONFIG_SPL_LOAD_FIT) += common_fit.o
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endif
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obj-$(CONFIG_$(SPL_TPL_)EXPO) += expo.o scene.o expo_build.o
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obj-$(CONFIG_$(SPL_TPL_)EXPO) += scene_menu.o scene_textline.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_VBE) += vbe.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_VBE_REQUEST) += vbe_request.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_VBE_SIMPLE) += vbe_simple.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_VBE_SIMPLE_FW) += vbe_simple_fw.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_VBE_SIMPLE_OS) += vbe_simple_os.o
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obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_ANDROID) += bootmeth_android.o
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