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Diff: TARGET_EFM32LG_STK3600/TOOLCHAIN_IAR/em_mpu.h
- Revision:
- 171:3a7713b1edbc
- Parent:
- 160:5571c4ff569f
diff -r e95d10626187 -r 3a7713b1edbc TARGET_EFM32LG_STK3600/TOOLCHAIN_IAR/em_mpu.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_EFM32LG_STK3600/TOOLCHAIN_IAR/em_mpu.h Thu Nov 08 11:45:42 2018 +0000 @@ -0,0 +1,234 @@ +/***************************************************************************//** + * @file em_mpu.h + * @brief Memory protection unit (MPU) peripheral API + * @version 5.3.3 + ******************************************************************************* + * # License + * <b>Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com</b> + ******************************************************************************* + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + * + * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no + * obligation to support this Software. Silicon Labs 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. + * + * Silicon Labs 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 EM_MPU_H +#define EM_MPU_H + +#include "em_device.h" + +#if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1) +#include "em_assert.h" + +#include <stdbool.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/***************************************************************************//** + * @addtogroup emlib + * @{ + ******************************************************************************/ + +/***************************************************************************//** + * @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. */ \ + 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. */ \ + 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(const MPU_RegionInit_TypeDef *init); + +/***************************************************************************//** + * @brief + * Disable the MPU + * @details + * Disable MPU and MPU fault exceptions. + ******************************************************************************/ +__STATIC_INLINE void MPU_Disable(void) +{ +#if defined(SCB_SHCSR_MEMFAULTENA_Msk) + SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk; /* Disable fault exceptions */ +#endif + 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 */ +#if defined(SCB_SHCSR_MEMFAULTENA_Msk) + SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk; /* Enable fault exceptions */ +#endif +} + +/** @} (end addtogroup MPU) */ +/** @} (end addtogroup emlib) */ + +#ifdef __cplusplus +} +#endif + +#endif /* defined(__MPU_PRESENT) && (__MPU_PRESENT == 1) */ + +#endif /* EM_MPU_H */