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

100 lines
3.9 KiB
C

/*
* File : drv_mpu.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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);