237 lines
11 KiB
C
237 lines
11 KiB
C
|
/***************************************************************************//**
|
||
|
|
* @file
|
||
|
|
* @brief Memory protection unit (MPU) peripheral API for EFM32.
|
||
|
|
* @author Energy Micro AS
|
||
|
|
* @version 1.3.0
|
||
|
|
*******************************************************************************
|
||
|
|
* @section License
|
||
|
|
* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
|
||
|
|
*******************************************************************************
|
||
|
|
*
|
||
|
|
* This source code is the property of Energy Micro AS. The source and compiled
|
||
|
|
* code may only be used on Energy Micro "EFM32" microcontrollers.
|
||
|
|
*
|
||
|
|
* This copyright notice may not be removed from the source code nor changed.
|
||
|
|
*
|
||
|
|
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
|
||
|
|
* obligation to support this Software. Energy Micro AS is providing the
|
||
|
|
* Software "AS IS", with no express or implied warranties of any kind,
|
||
|
|
* including, but not limited to, any implied warranties of merchantability
|
||
|
|
* or fitness for any particular purpose or warranties against infringement
|
||
|
|
* of any proprietary rights of a third party.
|
||
|
|
*
|
||
|
|
* Energy Micro AS will not be liable for any consequential, incidental, or
|
||
|
|
* special damages, or any other relief, or for any claim by any third party,
|
||
|
|
* arising from your use of this Software.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
#ifndef __EFM32_MPU_H
|
||
|
|
#define __EFM32_MPU_H
|
||
|
|
|
||
|
|
#include "efm32.h"
|
||
|
|
|
||
|
|
#if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1)
|
||
|
|
#include "efm32_assert.h"
|
||
|
|
|
||
|
|
#include <stdbool.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/***************************************************************************//**
|
||
|
|
* @addtogroup EFM32_Library
|
||
|
|
* @{
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/***************************************************************************//**
|
||
|
|
* @addtogroup MPU
|
||
|
|
* @{
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/** @anchor MPU_CTRL_PRIVDEFENA
|
||
|
|
* Argument to MPU_enable(). Enables priviledged
|
||
|
|
* access to default memory map. */
|
||
|
|
#define MPU_CTRL_PRIVDEFENA MPU_CTRL_PRIVDEFENA_Msk
|
||
|
|
|
||
|
|
/** @anchor MPU_CTRL_HFNMIENA
|
||
|
|
* Argument to MPU_enable(). Enables MPU during hard fault,
|
||
|
|
* NMI, and FAULTMASK handlers. */
|
||
|
|
#define MPU_CTRL_HFNMIENA MPU_CTRL_HFNMIENA_Msk
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
******************************** ENUMS ************************************
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Size of an MPU region.
|
||
|
|
*/
|
||
|
|
typedef enum
|
||
|
|
{
|
||
|
|
mpuRegionSize32b = 4, /**< 32 byte region size. */
|
||
|
|
mpuRegionSize64b = 5, /**< 64 byte region size. */
|
||
|
|
mpuRegionSize128b = 6, /**< 128 byte region size. */
|
||
|
|
mpuRegionSize256b = 7, /**< 256 byte region size. */
|
||
|
|
mpuRegionSize512b = 8, /**< 512 byte region size. */
|
||
|
|
mpuRegionSize1Kb = 9, /**< 1K byte region size. */
|
||
|
|
mpuRegionSize2Kb = 10, /**< 2K byte region size. */
|
||
|
|
mpuRegionSize4Kb = 11, /**< 4K byte region size. */
|
||
|
|
mpuRegionSize8Kb = 12, /**< 8K byte region size. */
|
||
|
|
mpuRegionSize16Kb = 13, /**< 16K byte region size. */
|
||
|
|
mpuRegionSize32Kb = 14, /**< 32K byte region size. */
|
||
|
|
mpuRegionSize64Kb = 15, /**< 64K byte region size. */
|
||
|
|
mpuRegionSize128Kb = 16, /**< 128K byte region size. */
|
||
|
|
mpuRegionSize256Kb = 17, /**< 256K byte region size. */
|
||
|
|
mpuRegionSize512Kb = 18, /**< 512K byte region size. */
|
||
|
|
mpuRegionSize1Mb = 19, /**< 1M byte region size. */
|
||
|
|
mpuRegionSize2Mb = 20, /**< 2M byte region size. */
|
||
|
|
mpuRegionSize4Mb = 21, /**< 4M byte region size. */
|
||
|
|
mpuRegionSize8Mb = 22, /**< 8M byte region size. */
|
||
|
|
mpuRegionSize16Mb = 23, /**< 16M byte region size. */
|
||
|
|
mpuRegionSize32Mb = 24, /**< 32M byte region size. */
|
||
|
|
mpuRegionSize64Mb = 25, /**< 64M byte region size. */
|
||
|
|
mpuRegionSize128Mb = 26, /**< 128M byte region size. */
|
||
|
|
mpuRegionSize256Mb = 27, /**< 256M byte region size. */
|
||
|
|
mpuRegionSize512Mb = 28, /**< 512M byte region size. */
|
||
|
|
mpuRegionSize1Gb = 29, /**< 1G byte region size. */
|
||
|
|
mpuRegionSize2Gb = 30, /**< 2G byte region size. */
|
||
|
|
mpuRegionSize4Gb = 31 /**< 4G byte region size. */
|
||
|
|
} MPU_RegionSize_TypeDef;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* MPU region access permission attributes.
|
||
|
|
*/
|
||
|
|
typedef enum
|
||
|
|
{
|
||
|
|
mpuRegionNoAccess = 0, /**< No access what so ever. */
|
||
|
|
mpuRegionApPRw = 1, /**< Priviledged state R/W only. */
|
||
|
|
mpuRegionApPRwURo = 2, /**< Priviledged state R/W, User state R only. */
|
||
|
|
mpuRegionApFullAccess = 3, /**< R/W in Priviledged and User state. */
|
||
|
|
mpuRegionApPRo = 5, /**< Priviledged R only. */
|
||
|
|
mpuRegionApPRo_URo = 6 /**< R only in Priviledged and User state. */
|
||
|
|
} MPU_RegionAp_TypeDef;
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
******************************* STRUCTS ***********************************
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/** MPU Region init structure. */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
bool regionEnable; /**< MPU region enable. */
|
||
|
|
uint8_t regionNo; /**< MPU region number. */
|
||
|
|
uint32_t baseAddress; /**< Region baseaddress. */
|
||
|
|
MPU_RegionSize_TypeDef size; /**< Memory region size. */
|
||
|
|
MPU_RegionAp_TypeDef accessPermission; /**< Memory access permissions. */
|
||
|
|
bool disableExec; /**< Disable execution. */
|
||
|
|
bool shareable; /**< Memory shareable attribute. */
|
||
|
|
bool cacheable; /**< Memory cacheable attribute. */
|
||
|
|
bool bufferable; /**< Memory bufferable attribute. */
|
||
|
|
uint8_t srd; /**< Memory subregion disable bits. */
|
||
|
|
uint8_t tex; /**< Memory type extension attributes. */
|
||
|
|
} MPU_RegionInit_TypeDef;
|
||
|
|
|
||
|
|
/** Default configuration of MPU region init structure for flash memory. */
|
||
|
|
#define MPU_INIT_FLASH_DEFAULT \
|
||
|
|
{ \
|
||
|
|
true, /* Enable MPU region. */ \
|
||
|
|
0, /* MPU Region number. */ \
|
||
|
|
FLASH_MEM_BASE, /* Flash base address. */ \
|
||
|
|
mpuRegionSize1Mb, /* Size - Set to max. for EFM32. */ \
|
||
|
|
mpuRegionApFullAccess, /* Access permissions. */ \
|
||
|
|
false, /* Execution allowed. */ \
|
||
|
|
false, /* Not shareable. */ \
|
||
|
|
true, /* Cacheable. */ \
|
||
|
|
false, /* Not bufferable. */ \
|
||
|
|
0, /* No subregions. */ \
|
||
|
|
0 /* No TEX attributes. */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** Default configuration of MPU region init structure for sram memory. */
|
||
|
|
#define MPU_INIT_SRAM_DEFAULT \
|
||
|
|
{ \
|
||
|
|
true, /* Enable MPU region. */ \
|
||
|
|
1, /* MPU Region number. */ \
|
||
|
|
RAM_MEM_BASE, /* SRAM base address. */ \
|
||
|
|
mpuRegionSize128Kb, /* Size - Set to max. for EFM32. */ \
|
||
|
|
mpuRegionApFullAccess, /* Access permissions. */ \
|
||
|
|
false, /* Execution allowed. */ \
|
||
|
|
true, /* Shareable. */ \
|
||
|
|
true, /* Cacheable. */ \
|
||
|
|
false, /* Not bufferable. */ \
|
||
|
|
0, /* No subregions. */ \
|
||
|
|
0 /* No TEX attributes. */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** Default configuration of MPU region init structure for onchip peripherals.*/
|
||
|
|
#define MPU_INIT_PERIPHERAL_DEFAULT \
|
||
|
|
{ \
|
||
|
|
true, /* Enable MPU region. */ \
|
||
|
|
0, /* MPU Region number. */ \
|
||
|
|
0, /* Region base address. */ \
|
||
|
|
mpuRegionSize32b, /* Size - Set to minimum */ \
|
||
|
|
mpuRegionApFullAccess, /* Access permissions. */ \
|
||
|
|
true, /* Execution not allowed. */ \
|
||
|
|
true, /* Shareable. */ \
|
||
|
|
false, /* Not cacheable. */ \
|
||
|
|
true, /* Bufferable. */ \
|
||
|
|
0, /* No subregions. */ \
|
||
|
|
0 /* No TEX attributes. */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
***************************** PROTOTYPES **********************************
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
void MPU_ConfigureRegion(MPU_RegionInit_TypeDef *init);
|
||
|
|
|
||
|
|
|
||
|
|
/***************************************************************************//**
|
||
|
|
* @brief
|
||
|
|
* Disable the MPU
|
||
|
|
* @details
|
||
|
|
* Disable MPU and MPU fault exceptions.
|
||
|
|
******************************************************************************/
|
||
|
|
static __INLINE void MPU_Disable(void)
|
||
|
|
{
|
||
|
|
SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk; /* Disable fault exceptions */
|
||
|
|
MPU->CTRL &= ~MPU_CTRL_ENABLE_Msk; /* Disable the MPU */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***************************************************************************//**
|
||
|
|
* @brief
|
||
|
|
* Enable the MPU
|
||
|
|
* @details
|
||
|
|
* Enable MPU and MPU fault exceptions.
|
||
|
|
* @param[in] flags
|
||
|
|
* Use a logical OR of @ref MPU_CTRL_PRIVDEFENA and
|
||
|
|
* @ref MPU_CTRL_HFNMIENA as needed.
|
||
|
|
******************************************************************************/
|
||
|
|
static __INLINE void MPU_Enable(uint32_t flags)
|
||
|
|
{
|
||
|
|
EFM_ASSERT(!(flags & ~(MPU_CTRL_PRIVDEFENA_Msk |
|
||
|
|
MPU_CTRL_HFNMIENA_Msk |
|
||
|
|
MPU_CTRL_ENABLE_Msk)));
|
||
|
|
|
||
|
|
MPU->CTRL = flags | MPU_CTRL_ENABLE_Msk; /* Enable the MPU */
|
||
|
|
SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk; /* Enable fault exceptions */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** @} (end addtogroup MPU) */
|
||
|
|
/** @} (end addtogroup EFM32_Library) */
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* defined(__MPU_PRESENT) && (EBI_COUNT == 1) */
|
||
|
|
|
||
|
|
#endif /* __EFM32_MPU_H */
|