mpu.h

Go to the documentation of this file.

//*****************************************************************************
//
// mpu.h - Defines and Macros for the memory protection unit.
//
// Copyright (c) 2005-2017 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
//
//   Redistribution and use in source and binary forms, with or without
//   modification, are permitted provided that the following conditions
//   are met:
//
//   Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the
//   distribution.
//
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//*****************************************************************************

#ifndef __DRIVERLIB_MPU_H__
#define __DRIVERLIB_MPU_H__

#include <stdint.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__