| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * SPDX-License-Identifier: BSD-2-Clause |
| */ |
| |
| #ifndef __ANDROID_AB_H |
| #define __ANDROID_AB_H |
| |
| #include <common.h> |
| |
| /* Android standard boot slot names are 'a', 'b', 'c', ... */ |
| #define ANDROID_BOOT_SLOT_NAME(slot_num) ('a' + (slot_num)) |
| |
| /* Number of slots */ |
| #define ANDROID_NUM_SLOTS 2 |
| |
| /** android_ab_select - 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. |
| * |
| * @dev_desc: Place to store the device description pointer. |
| * @part_info: Place to store the partition information. |
| * @return the slot number (0-based) on success, or -1 on error. |
| */ |
| int android_ab_select(struct blk_desc *dev_desc, disk_partition_t *part_info); |
| |
| #endif |
