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//***************************************************************************** | |
// | |
// mpu.h - Driver for the MPU Module. | |
// | |
//***************************************************************************** | |
#ifndef __MSP430WARE_MPU_H__ | |
#define __MSP430WARE_MPU_H__ | |
#include "inc/hw_memmap.h" | |
#ifdef __MSP430_HAS_MPU__ | |
//***************************************************************************** | |
// | |
// If building with a C++ compiler, make all of the definitions in this header | |
// have a C binding. | |
// | |
//***************************************************************************** | |
#ifdef __cplusplus | |
extern "C" | |
{ | |
#endif | |
#include "inc/hw_regaccess.h" | |
//***************************************************************************** | |
// | |
//! \brief Used in the MPU_initThreeSegments() function as the param parameter. | |
// | |
//***************************************************************************** | |
typedef struct MPU_initThreeSegmentsParam | |
{ | |
//! Valid values can be found in the Family User's Guide | |
uint16_t seg1boundary; | |
//! Valid values can be found in the Family User's Guide | |
uint16_t seg2boundary; | |
//! Is the bit mask of access right for memory segment 1. | |
//! \n Logical OR of any of the following: | |
//! - \b MPU_READ | |
//! - \b MPU_WRITE | |
//! - \b MPU_EXEC | |
//! - \b MPU_NO_READ_WRITE_EXEC | |
uint8_t seg1accmask; | |
//! Is the bit mask of access right for memory segment 2. | |
//! \n Logical OR of any of the following: | |
//! - \b MPU_READ | |
//! - \b MPU_WRITE | |
//! - \b MPU_EXEC | |
//! - \b MPU_NO_READ_WRITE_EXEC | |
uint8_t seg2accmask; | |
//! Is the bit mask of access right for memory segment 3. | |
//! \n Logical OR of any of the following: | |
//! - \b MPU_READ | |
//! - \b MPU_WRITE | |
//! - \b MPU_EXEC | |
//! - \b MPU_NO_READ_WRITE_EXEC | |
uint8_t seg3accmask; | |
} MPU_initThreeSegmentsParam; | |
//***************************************************************************** | |
// | |
// The following are values that can be passed to the accmask parameter for | |
// functions: MPU_initInfoSegment(); the seg2accmask parameter for functions: | |
// MPU_initTwoSegments(); the seg1accmask parameter for functions: | |
// MPU_initTwoSegments(); the param parameter for functions: | |
// MPU_initThreeSegments(), MPU_initThreeSegments(), and | |
// MPU_initThreeSegments(). | |
// | |
//***************************************************************************** | |
#define MPU_READ MPUSEG1RE | |
#define MPU_WRITE MPUSEG1WE | |
#define MPU_EXEC MPUSEG1XE | |
#define MPU_NO_READ_WRITE_EXEC (0x0000) | |
//***************************************************************************** | |
// | |
// The following are values that can be passed to the segment parameter for | |
// functions: MPU_enablePUCOnViolation(), and MPU_disablePUCOnViolation(). | |
// | |
//***************************************************************************** | |
#define MPU_FIRST_SEG MPUSEG1VS | |
#define MPU_SECOND_SEG MPUSEG2VS | |
#define MPU_THIRD_SEG MPUSEG3VS | |
#define MPU_INFO_SEG MPUSEGIVS | |
//***************************************************************************** | |
// | |
// The following are values that can be passed to the memAccFlag parameter for | |
// functions: MPU_getInterruptStatus(), and MPU_clearInterrupt() as well as | |
// returned by the MPU_getInterruptStatus() function, the | |
// MPU_clearAllInterrupts() function and the MPU_clearInterrupt() function. | |
// | |
//***************************************************************************** | |
#define MPU_SEG_1_ACCESS_VIOLATION MPUSEG1IFG | |
#define MPU_SEG_2_ACCESS_VIOLATION MPUSEG2IFG | |
#define MPU_SEG_3_ACCESS_VIOLATION MPUSEG3IFG | |
#define MPU_SEG_INFO_ACCESS_VIOLATION MPUSEGIIFG | |
//***************************************************************************** | |
// | |
// Prototypes for the APIs. | |
// | |
//***************************************************************************** | |
//***************************************************************************** | |
// | |
//! \brief Initializes MPU with two memory segments | |
//! | |
//! This function creates two memory segments in FRAM allowing the user to set | |
//! access right to each segment. To set the correct value for seg1boundary, | |
//! the user must consult the Device Family User's Guide and provide the MPUSBx | |
//! value corresponding to the memory address where the user wants to create | |
//! the partition. Consult the "Segment Border Setting" section in the User's | |
//! Guide to find the options available for MPUSBx. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param seg1boundary Valid values can be found in the Family User's Guide | |
//! \param seg1accmask is the bit mask of access right for memory segment 1. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_READ - Read rights | |
//! - \b MPU_WRITE - Write rights | |
//! - \b MPU_EXEC - Execute rights | |
//! - \b MPU_NO_READ_WRITE_EXEC - no read/write/execute rights | |
//! \param seg2accmask is the bit mask of access right for memory segment 2 | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_READ - Read rights | |
//! - \b MPU_WRITE - Write rights | |
//! - \b MPU_EXEC - Execute rights | |
//! - \b MPU_NO_READ_WRITE_EXEC - no read/write/execute rights | |
//! | |
//! Modified bits of \b MPUSAM register, bits of \b MPUSEG register and bits of | |
//! \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_initTwoSegments(uint16_t baseAddress, | |
uint16_t seg1boundary, | |
uint8_t seg1accmask, | |
uint8_t seg2accmask); | |
//***************************************************************************** | |
// | |
//! \brief Initializes MPU with three memory segments | |
//! | |
//! This function creates three memory segments in FRAM allowing the user to | |
//! set access right to each segment. To set the correct value for | |
//! seg1boundary, the user must consult the Device Family User's Guide and | |
//! provide the MPUSBx value corresponding to the memory address where the user | |
//! wants to create the partition. Consult the "Segment Border Setting" section | |
//! in the User's Guide to find the options available for MPUSBx. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param param is the pointer to struct for initializing three segments. | |
//! | |
//! Modified bits of \b MPUSAM register, bits of \b MPUSEG register and bits of | |
//! \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_initThreeSegments(uint16_t baseAddress, | |
MPU_initThreeSegmentsParam *param); | |
//***************************************************************************** | |
// | |
//! \brief Initializes user information memory segment | |
//! | |
//! This function initializes user information memory segment with specified | |
//! access rights. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param accmask is the bit mask of access right for user information memory | |
//! segment. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_READ - Read rights | |
//! - \b MPU_WRITE - Write rights | |
//! - \b MPU_EXEC - Execute rights | |
//! - \b MPU_NO_READ_WRITE_EXEC - no read/write/execute rights | |
//! | |
//! Modified bits of \b MPUSAM register and bits of \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_initInfoSegment(uint16_t baseAddress, | |
uint8_t accmask); | |
//***************************************************************************** | |
// | |
//! \brief The following function enables the NMI Event if a Segment violation | |
//! has occurred. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! | |
//! Modified bits of \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_enableNMIevent(uint16_t baseAddress); | |
//***************************************************************************** | |
// | |
//! \brief The following function enables the MPU module in the device. | |
//! | |
//! This function needs to be called once all memory segmentation has been | |
//! done. If this function is not called the MPU module will not be activated. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! | |
//! Modified bits of \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_start(uint16_t baseAddress); | |
//***************************************************************************** | |
// | |
//! \brief The following function enables PUC generation when an access | |
//! violation has occurred on the memory segment selected by the user. | |
//! | |
//! Note that only specified segments for PUC generation are enabled. Other | |
//! segments for PUC generation are left untouched. Users may call | |
//! MPU_enablePUCOnViolation() and MPU_disablePUCOnViolation() to assure that | |
//! all the bits will be set and/or cleared. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param segment is the bit mask of memory segment that will generate a PUC | |
//! when an access violation occurs. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_FIRST_SEG - PUC generation on first memory segment | |
//! - \b MPU_SECOND_SEG - PUC generation on second memory segment | |
//! - \b MPU_THIRD_SEG - PUC generation on third memory segment | |
//! - \b MPU_INFO_SEG - PUC generation on user information memory | |
//! segment | |
//! | |
//! Modified bits of \b MPUSAM register and bits of \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_enablePUCOnViolation(uint16_t baseAddress, | |
uint16_t segment); | |
//***************************************************************************** | |
// | |
//! \brief The following function disables PUC generation when an access | |
//! violation has occurred on the memory segment selected by the user. | |
//! | |
//! Note that only specified segments for PUC generation are disabled. Other | |
//! segments for PUC generation are left untouched. Users may call | |
//! MPU_enablePUCOnViolation() and MPU_disablePUCOnViolation() to assure that | |
//! all the bits will be set and/or cleared. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param segment is the bit mask of memory segment that will NOT generate a | |
//! PUC when an access violation occurs. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_FIRST_SEG - PUC generation on first memory segment | |
//! - \b MPU_SECOND_SEG - PUC generation on second memory segment | |
//! - \b MPU_THIRD_SEG - PUC generation on third memory segment | |
//! - \b MPU_INFO_SEG - PUC generation on user information memory | |
//! segment | |
//! | |
//! Modified bits of \b MPUSAM register and bits of \b MPUCTL0 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_disablePUCOnViolation(uint16_t baseAddress, | |
uint16_t segment); | |
//***************************************************************************** | |
// | |
//! \brief Returns the memory segment violation flag status requested by the | |
//! user. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param memAccFlag is the is the memory access violation flag. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_SEG_1_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 1 is detected | |
//! - \b MPU_SEG_2_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 2 is detected | |
//! - \b MPU_SEG_3_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 3 is detected | |
//! - \b MPU_SEG_INFO_ACCESS_VIOLATION - is set if an access violation | |
//! in User Information Memory Segment is detected | |
//! | |
//! \return Logical OR of any of the following: | |
//! - \b MPU_SEG_1_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 1 is detected | |
//! - \b MPU_SEG_2_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 2 is detected | |
//! - \b MPU_SEG_3_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 3 is detected | |
//! - \b MPU_SEG_INFO_ACCESS_VIOLATION is set if an access violation in | |
//! User Information Memory Segment is detected | |
//! \n indicating the status of the masked flags. | |
// | |
//***************************************************************************** | |
extern uint16_t MPU_getInterruptStatus(uint16_t baseAddress, | |
uint16_t memAccFlag); | |
//***************************************************************************** | |
// | |
//! \brief Clears the masked interrupt flags | |
//! | |
//! Returns the memory segment violation flag status requested by the user or | |
//! if user is providing a bit mask value, the function will return a value | |
//! indicating if all flags were cleared. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! \param memAccFlag is the is the memory access violation flag. | |
//! Mask value is the logical OR of any of the following: | |
//! - \b MPU_SEG_1_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 1 is detected | |
//! - \b MPU_SEG_2_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 2 is detected | |
//! - \b MPU_SEG_3_ACCESS_VIOLATION - is set if an access violation in | |
//! Main Memory Segment 3 is detected | |
//! - \b MPU_SEG_INFO_ACCESS_VIOLATION - is set if an access violation | |
//! in User Information Memory Segment is detected | |
//! | |
//! \return Logical OR of any of the following: | |
//! - \b MPU_SEG_1_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 1 is detected | |
//! - \b MPU_SEG_2_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 2 is detected | |
//! - \b MPU_SEG_3_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 3 is detected | |
//! - \b MPU_SEG_INFO_ACCESS_VIOLATION is set if an access violation in | |
//! User Information Memory Segment is detected | |
//! \n indicating the status of the masked flags. | |
// | |
//***************************************************************************** | |
extern uint16_t MPU_clearInterrupt(uint16_t baseAddress, | |
uint16_t memAccFlag); | |
//***************************************************************************** | |
// | |
//! \brief Clears all Memory Segment Access Violation Interrupt Flags. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! | |
//! Modified bits of \b MPUCTL1 register. | |
//! | |
//! \return Logical OR of any of the following: | |
//! - \b MPU_SEG_1_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 1 is detected | |
//! - \b MPU_SEG_2_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 2 is detected | |
//! - \b MPU_SEG_3_ACCESS_VIOLATION is set if an access violation in | |
//! Main Memory Segment 3 is detected | |
//! - \b MPU_SEG_INFO_ACCESS_VIOLATION is set if an access violation in | |
//! User Information Memory Segment is detected | |
//! \n indicating the status of the interrupt flags. | |
// | |
//***************************************************************************** | |
extern uint16_t MPU_clearAllInterrupts(uint16_t baseAddress); | |
//***************************************************************************** | |
// | |
//! \brief Lock MPU to protect from write access. | |
//! | |
//! Sets MPULOCK to protect MPU from write access on all MPU registers except | |
//! MPUCTL1, MPUIPC0 and MPUIPSEGBx until a BOR occurs. MPULOCK bit cannot be | |
//! cleared manually. MPU_clearInterrupt() and MPU_clearAllInterrupts() still | |
//! can be used after this API is called. | |
//! | |
//! \param baseAddress is the base address of the MPU module. | |
//! | |
//! Modified bits are \b MPULOCK of \b MPUCTL1 register. | |
//! | |
//! \return None | |
// | |
//***************************************************************************** | |
extern void MPU_lockMPU(uint16_t baseAddress); | |
//***************************************************************************** | |
// | |
// Mark the end of the C bindings section for C++ compilers. | |
// | |
//***************************************************************************** | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif | |
#endif // __MSP430WARE_MPU_H__ |