mirror of https://github.com/ARMmbed/mbed-os.git
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/** \addtogroup platform */
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/** @{*/
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/**
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* \defgroup platform_mpu_mgmt MPU management functions
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* @{
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*/
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/* mbed Microcontroller Library
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* Copyright (c) 2006-2018 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBED_MPU_MGMT_H
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#define MBED_MPU_MGMT_H
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#include "mbed_toolchain.h"
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#include "hal/mpu_api.h"
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if (DEVICE_MPU && MBED_CONF_PLATFORM_USE_MPU) || defined(DOXYGEN_ONLY)
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#define mbed_mpu_manager_init() mbed_mpu_init()
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#define mbed_mpu_manager_deinit() mbed_mpu_free()
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/** Lock ram execute never mode off
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*
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* This disables the MPU's execute never ram protection and allows
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* functions to run from RAM. Execution directly from ram will be
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* allowed if this function is invoked at least once (the internal
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* counter is non-zero).
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*
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* Use this locking mechanism for code which needs to execute from
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* ram such as flash programming algorithms and ram thunks.
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*
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* The lock is a counter, can be locked up to USHRT_MAX
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* This function is IRQ and thread safe
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*/
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void mbed_mpu_manager_lock_ram_execution(void);
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/** Unlock ram execute never mode
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*
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* Use unlocking in pair with mbed_mpu_manager_lock_ram_execution().
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*
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* The lock is a counter, should be equally unlocked as locked
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* This function is IRQ and thread safe
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*/
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void mbed_mpu_manager_unlock_ram_execution(void);
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/** Lock rom write never mode off
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*
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* This disables the MPU's read only ROM protection and allows
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* ROM to be written to. Writing to ROM will not result in an MPU
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* fault if this function is invoked at least once (the internal
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* counter is non-zero).
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*
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* Use this locking mechanism for code which needs to write to
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* ROM such as flash programming algorithms.
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*
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* The lock is a counter, can be locked up to USHRT_MAX
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* This function is IRQ and thread safe
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*/
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void mbed_mpu_manager_lock_rom_write(void);
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/** Unlock rom write never mode
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*
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* Use unlocking in pair with mbed_mpu_manager_lock_rom_write().
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*
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* The lock is a counter, should be equally unlocked as locked
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* This function is IRQ and thread safe
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*/
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void mbed_mpu_manager_unlock_rom_write(void);
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#else
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#define mbed_mpu_manager_init() (void)0
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#define mbed_mpu_manager_deinit() (void)0
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#define mbed_mpu_manager_lock_ram_execution() (void)0
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#define mbed_mpu_manager_unlock_ram_execution() (void)0
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#define mbed_mpu_manager_lock_rom_write() (void)0
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#define mbed_mpu_manager_unlock_rom_write() (void)0
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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/** @}*/
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/** @}*/
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