1 /*
2  * Copyright (C) 2021 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 
17 #pragma once
18 
19 namespace android {
20 namespace hardware {
21 namespace boot {
22 namespace V1_2 {
23 namespace implementation {
24 
25 //
26 // definitions taken from ABL code
27 //
28 
29 constexpr uint32_t DEVINFO_MAGIC = 0x49564544;
30 constexpr size_t DEVINFO_AB_SLOT_COUNT = 2;
31 
32 struct devinfo_ab_slot_data_t {
33     uint8_t retry_count;
34     uint8_t unbootable : 1;
35     uint8_t successful : 1;
36     uint8_t active : 1;
37     uint8_t fastboot_ok : 1;
38     uint8_t : 4;
39     uint8_t unused[2];
40 } __attribute__((packed));
41 
42 typedef struct {
43     devinfo_ab_slot_data_t slots[DEVINFO_AB_SLOT_COUNT];
44 } __attribute__((packed)) devinfo_ab_data_t;
45 
46 struct devinfo_t {
47     uint32_t magic;
48     uint16_t ver_major;
49     uint16_t ver_minor;
50     uint8_t unused[40];
51     devinfo_ab_data_t ab_data;
52     uint8_t unused1[72];  // use remaining up to complete 128 bytes
53 } __attribute__((packed));
54 
55 static_assert(sizeof(devinfo_t) == 128, "invalid devinfo struct size");
56 
57 }  // namespace implementation
58 }  // namespace V1_2
59 }  // namespace boot
60 }  // namespace hardware
61 }  // namespace android
62