53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/*
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* File : drv_mpu.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2018-05-17 ZYH first implementation
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*/
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#include "drv_mpu.h"
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#include <rtthread.h>
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#include "stm32f7xx.h"
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int bsp_mpu_hw_init(void)
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{
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MPU_Region_InitTypeDef MPU_InitStruct;
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/* Disables the MPU */
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HAL_MPU_Disable();
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/**Initializes and configures the Region and the memory to be protected
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*/
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MPU_InitStruct.Enable = MPU_REGION_ENABLE;
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MPU_InitStruct.Number = MPU_REGION_NUMBER0;
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MPU_InitStruct.BaseAddress = 0x20000000;
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MPU_InitStruct.Size = MPU_REGION_SIZE_512KB;
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MPU_InitStruct.SubRegionDisable = 0x0;
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MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
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MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
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MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
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MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
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MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
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MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
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HAL_MPU_ConfigRegion(&MPU_InitStruct);
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/* Enables the MPU */
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HAL_MPU_Enable(MPU_HFNMI_PRIVDEF);
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return 0;
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}
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