1/* 2 * Copyright 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware.boot@1.2; 18 19import @1.0::IBootControl; 20import @1.0::Slot; 21import @1.1::IBootControl; 22 23interface IBootControl extends @1.1::IBootControl { 24 25 /** 26 * Returns the active slot to boot into on the next boot. If 27 * setActiveBootSlot() has been called, the getter function should return the 28 * same slot as the one provided in the last setActiveBootSlot() call. 29 * The returned value is always guaranteed to be strictly less than the 30 * value returned by getNumberSlots. Slots start at 0 and finish at 31 * getNumberSlots() - 1. For instance, a system with A/B must return 0 or 1. 32 */ 33 getActiveBootSlot() generates (Slot slot); 34}; 35 36