mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 20:54:31 +00:00
d65e8da92e
This patch determines the A/B-specific bootloader message structure that is the basis for implementation of recovery and A/B update functions. A/B metadata is stored in this structure and used to decide which slot should we use to boot the device. Also some basic functions for A/B metadata manipulation are implemented (like slot selection). The patch was extracted from commits [1], [2] with some coding style fixes. [1] https://android-review.googlesource.com/c/platform/external/u-boot/+/729878/2 [2] https://android-review.googlesource.com/c/platform/external/u-boot/+/729880/2 Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko@linaro.org> Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (C) 2017 The Android Open Source Project
|
|
*/
|
|
|
|
#ifndef __ANDROID_AB_H
|
|
#define __ANDROID_AB_H
|
|
|
|
#include <common.h>
|
|
|
|
/* Android standard boot slot names are 'a', 'b', 'c', ... */
|
|
#define BOOT_SLOT_NAME(slot_num) ('a' + (slot_num))
|
|
|
|
/* Number of slots */
|
|
#define NUM_SLOTS 2
|
|
|
|
/**
|
|
* Select the slot where to boot from.
|
|
*
|
|
* On Android devices with more than one boot slot (multiple copies of the
|
|
* kernel and system images) selects which slot should be used to boot from and
|
|
* registers the boot attempt. This is used in by the new A/B update model where
|
|
* one slot is updated in the background while running from the other slot. If
|
|
* the selected slot did not successfully boot in the past, a boot attempt is
|
|
* registered before returning from this function so it isn't selected
|
|
* indefinitely.
|
|
*
|
|
* @param[in] dev_desc Place to store the device description pointer
|
|
* @param[in] part_info Place to store the partition information
|
|
* @return The slot number (>= 0) on success, or a negative on error
|
|
*/
|
|
int ab_select_slot(struct blk_desc *dev_desc, disk_partition_t *part_info);
|
|
|
|
#endif /* __ANDROID_AB_H */
|