rt-thread-official/bsp/stm32f7-disco/drivers/drv_mpu.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-05-17     ZYH          first implementation
 */
#include "drv_mpu.h"
#include <rtthread.h>
#include "stm32f7xx.h"
int bsp_mpu_hw_init(void)
{
    MPU_Region_InitTypeDef MPU_InitStruct;

    /* Disables the MPU */
    HAL_MPU_Disable();
    /**Initializes and configures the Region and the memory to be protected
    */
    MPU_InitStruct.Enable = MPU_REGION_ENABLE;
    MPU_InitStruct.Number = MPU_REGION_NUMBER0;
    MPU_InitStruct.BaseAddress = 0x20000000;
    MPU_InitStruct.Size = MPU_REGION_SIZE_512KB;
    MPU_InitStruct.SubRegionDisable = 0x0;
    MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
    MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
    MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
    MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
    MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
    MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;

    HAL_MPU_ConfigRegion(&MPU_InitStruct);

    /* Enables the MPU */
    HAL_MPU_Enable(MPU_HFNMI_PRIVDEF);
    return 0;
}