1 /* 2 * Copyright (C) 2016 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 _MPU_H_ 18 #define _MPU_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 25 /* 26 * MPU is very specific to each platform, so here really we just 27 * leave it to the platform code to do the right thing for all the 28 * requisite areas and such. Thhe simplest valid MPU implementation 29 * will do nothing. Clearly we should strive to do more than that 30 */ 31 32 void mpuStart(void); 33 void mpuAllowRamExecution(bool allowSvcExecute); /* for Supervisor only, if possible */ 34 void mpuAllowRomWrite(bool allowSvcWrite); /* for Supervisor only, if possible */ 35 36 37 #ifdef __cplusplus 38 } 39 #endif 40 41 #endif 42 43