mpu.h

//*****************************************************************************
//
// mpu.h - Defines and Macros for the memory protection unit.
//
// Copyright (c) 2005-2013 Texas Instruments Incorporated.  All rights reserved.
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// 
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//   Redistributions in binary form must reproduce the above copyright
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// 
// This is part of revision 1.1 of the Tiva Peripheral Driver Library.
//
//*****************************************************************************

#ifndef __DRIVERLIB_MPU_H__
#define __DRIVERLIB_MPU_H__

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

//*****************************************************************************
//
// Flags that can be passed to MPUEnable.
//
//*****************************************************************************
#define MPU_CONFIG_PRIV_DEFAULT     4
#define MPU_CONFIG_HARDFLT_NMI      2
#define MPU_CONFIG_NONE             0

//*****************************************************************************
//
// Flags for the region size to be passed to MPURegionSet.
//
//*****************************************************************************
#define MPU_RGN_SIZE_32B            (4 << 1)
#define MPU_RGN_SIZE_64B            (5 << 1)
#define MPU_RGN_SIZE_128B           (6 << 1)
#define MPU_RGN_SIZE_256B           (7 << 1)
#define MPU_RGN_SIZE_512B           (8 << 1)

#define MPU_RGN_SIZE_1K             (9 << 1)
#define MPU_RGN_SIZE_2K             (10 << 1)
#define MPU_RGN_SIZE_4K             (11 << 1)
#define MPU_RGN_SIZE_8K             (12 << 1)
#define MPU_RGN_SIZE_16K            (13 << 1)
#define MPU_RGN_SIZE_32K            (14 << 1)
#define MPU_RGN_SIZE_64K            (15 << 1)
#define MPU_RGN_SIZE_128K           (16 << 1)
#define MPU_RGN_SIZE_256K           (17 << 1)
#define MPU_RGN_SIZE_512K           (18 << 1)

#define MPU_RGN_SIZE_1M             (19 << 1)
#define MPU_RGN_SIZE_2M             (20 << 1)
#define MPU_RGN_SIZE_4M             (21 << 1)
#define MPU_RGN_SIZE_8M             (22 << 1)
#define MPU_RGN_SIZE_16M            (23 << 1)
#define MPU_RGN_SIZE_32M            (24 << 1)
#define MPU_RGN_SIZE_64M            (25 << 1)
#define MPU_RGN_SIZE_128M           (26 << 1)
#define MPU_RGN_SIZE_256M           (27 << 1)
#define MPU_RGN_SIZE_512M           (28 << 1)

#define MPU_RGN_SIZE_1G             (29 << 1)
#define MPU_RGN_SIZE_2G             (30 << 1)
#define MPU_RGN_SIZE_4G             (31 << 1)

//*****************************************************************************
//
// Flags for the permissions to be passed to MPURegionSet.
//
//*****************************************************************************
#define MPU_RGN_PERM_EXEC           0x00000000
#define MPU_RGN_PERM_NOEXEC         0x10000000
#define MPU_RGN_PERM_PRV_NO_USR_NO  0x00000000
#define MPU_RGN_PERM_PRV_RW_USR_NO  0x01000000
#define MPU_RGN_PERM_PRV_RW_USR_RO  0x02000000
#define MPU_RGN_PERM_PRV_RW_USR_RW  0x03000000
#define MPU_RGN_PERM_PRV_RO_USR_NO  0x05000000
#define MPU_RGN_PERM_PRV_RO_USR_RO  0x06000000

//*****************************************************************************
//
// Flags for the sub-region to be passed to MPURegionSet.
//
//*****************************************************************************
#define MPU_SUB_RGN_DISABLE_0       0x00000100
#define MPU_SUB_RGN_DISABLE_1       0x00000200
#define MPU_SUB_RGN_DISABLE_2       0x00000400
#define MPU_SUB_RGN_DISABLE_3       0x00000800
#define MPU_SUB_RGN_DISABLE_4       0x00001000
#define MPU_SUB_RGN_DISABLE_5       0x00002000
#define MPU_SUB_RGN_DISABLE_6       0x00004000
#define MPU_SUB_RGN_DISABLE_7       0x00008000

//*****************************************************************************
//
// Flags to enable or disable a region, to be passed to MPURegionSet.
//
//*****************************************************************************
#define MPU_RGN_ENABLE              1
#define MPU_RGN_DISABLE             0

//*****************************************************************************
//
// API Function prototypes
//
//*****************************************************************************
extern void MPUEnable(uint32_t ui32MPUConfig);
extern void MPUDisable(void);
extern uint32_t MPURegionCountGet(void);
extern void MPURegionEnable(uint32_t ui32Region);
extern void MPURegionDisable(uint32_t ui32Region);
extern void MPURegionSet(uint32_t ui32Region, uint32_t ui32Addr,
                         uint32_t ui32Flags);
extern void MPURegionGet(uint32_t ui32Region, uint32_t *pui32Addr,
                         uint32_t *pui32Flags);
extern void MPUIntRegister(void (*pfnHandler)(void));
extern void MPUIntUnregister(void);

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

#endif // __DRIVERLIB_MPU_H__