1 /* 2 * Copyright (C) 2008 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 #ifndef _RECOVERY_BOOTLOADER_H 18 #define _RECOVERY_BOOTLOADER_H 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 /* Bootloader Message 25 * 26 * This structure describes the content of a block in flash 27 * that is used for recovery and the bootloader to talk to 28 * each other. 29 * 30 * The command field is updated by linux when it wants to 31 * reboot into recovery or to update radio or bootloader firmware. 32 * It is also updated by the bootloader when firmware update 33 * is complete (to boot into recovery for any final cleanup) 34 * 35 * The status field is written by the bootloader after the 36 * completion of an "update-radio" or "update-hboot" command. 37 * 38 * The recovery field is only written by linux and used 39 * for the system to send a message to recovery or the 40 * other way around. 41 */ 42 struct bootloader_message { 43 char command[32]; 44 char status[32]; 45 char recovery[1024]; 46 }; 47 48 /* Read and write the bootloader command from the "misc" partition. 49 * These return zero on success. 50 */ 51 int get_bootloader_message(struct bootloader_message *out); 52 int set_bootloader_message(const struct bootloader_message *in); 53 54 #ifdef __cplusplus 55 } 56 #endif 57 58 #endif 59