rt-thread/bsp/stm32h743-nucleo/drivers/drv_mpu.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2017-08-25     LongfeiMa    the first version for stm32h7xx
 */ 

#include "drv_mpu.h"
#include <rtthread.h>
#include "stm32h7xx.h"
int mpu_init(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;
  
  /* Disable the MPU */
  HAL_MPU_Disable();

//  /* Configure the MPU attributes as WT for SRAM */
//  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
//  MPU_InitStruct.BaseAddress = 0x20010000;
//  MPU_InitStruct.Size = MPU_REGION_SIZE_256KB;
//  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
//  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
//  MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
//  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
//  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
//  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
//  MPU_InitStruct.SubRegionDisable = 0x00;
//  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
//
//  HAL_MPU_ConfigRegion(&MPU_InitStruct);
//
//  /* Configure the MPU attributes as WB for SDRAM */
//  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
//  MPU_InitStruct.BaseAddress = 0xC0000000;
//  MPU_InitStruct.Size = MPU_REGION_SIZE_8MB;
//  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
//  MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
//  MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
//  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
//  MPU_InitStruct.Number = MPU_REGION_NUMBER1;
//  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
//  MPU_InitStruct.SubRegionDisable = 0x00;
//  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
//
//  HAL_MPU_ConfigRegion(&MPU_InitStruct);
//
//  /* Configure the MPU attributes as none-cache for 1MB SDRAM */
//  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
//  MPU_InitStruct.BaseAddress = 0xC0100000;
//  MPU_InitStruct.Size = MPU_REGION_SIZE_1MB;
//  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
//  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
//  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
//  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
//  MPU_InitStruct.Number = MPU_REGION_NUMBER2;
//  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
//  MPU_InitStruct.SubRegionDisable = 0x00;
//  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
//
//  HAL_MPU_ConfigRegion(&MPU_InitStruct);
  
	/* Configure the MPU attributes as WT for SRAM */
	MPU_InitStruct.Enable = MPU_REGION_ENABLE;
	MPU_InitStruct.BaseAddress = 0x30040000;
	MPU_InitStruct.Size = MPU_REGION_SIZE_256B;
	MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
	MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
	MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
	MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
	MPU_InitStruct.Number = MPU_REGION_NUMBER0;
	MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
	MPU_InitStruct.SubRegionDisable = 0x00;
	MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

	HAL_MPU_ConfigRegion(&MPU_InitStruct);
    
  /* Enable the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
	return 0;
}
//INIT_BOARD_EXPORT(mpu_init);