Introduction

For more details and example usage, see MPU for ARMv7 (ARM R5, ARM M4)

Data Structures
struct	MpuP_RegionAttrs
	Attribute's to apply for a MPU region. More...

struct	MpuP_RegionConfig
	Region config structure, this used by SysConfig and not to be used by end-users directly. More...

struct	MpuP_Config
	MPU config structure, this used by SysConfig and not to be used by end-users directly. More...

Functions
void	MpuP_RegionAttrs_init (MpuP_RegionAttrs *region)
	Set default values to MpuP_RegionAttrs. More...

void	MpuP_setRegion (uint32_t regionNum, void addr, uint32_t size, MpuP_RegionAttrs attrs)
	Setup a region in the MPU. More...

void	MpuP_enable ()
	Enable MPU sub-system using the region that are setup using MpuP_setRegion. More...

void	MpuP_disable ()
	Disable MPU sub-system. More...

uint32_t	MpuP_isEnable ()
	Check if MPU sub-system is enabled. More...

void	MpuP_init ()
	Initialize MPU sub-system, called by SysConfig, not to be called by end users. More...

Enumerations
enum	MpuP_AccessPerm { MpuP_AP_ALL_BLOCK = (0x0u), MpuP_AP_S_RW = (0x1u), MpuP_AP_S_RW_U_R = (0x2u), MpuP_AP_ALL_RW = (0x3u), MpuP_AP_S_R = (0x5u), MpuP_AP_ALL_R = (0x6u) }
	Enum's to represent different types of access permissions that are possible for a given MPU region. More...

enum	MpuP_RegionSize { MpuP_RegionSize_32 = 0x4, MpuP_RegionSize_64, MpuP_RegionSize_128, MpuP_RegionSize_256, MpuP_RegionSize_512, MpuP_RegionSize_1K, MpuP_RegionSize_2K, MpuP_RegionSize_4K, MpuP_RegionSize_8K, MpuP_RegionSize_16K, MpuP_RegionSize_32K, MpuP_RegionSize_64K, MpuP_RegionSize_128K, MpuP_RegionSize_256K, MpuP_RegionSize_512K, MpuP_RegionSize_1M, MpuP_RegionSize_2M, MpuP_RegionSize_4M, MpuP_RegionSize_8M, MpuP_RegionSize_16M, MpuP_RegionSize_32M, MpuP_RegionSize_64M, MpuP_RegionSize_128M, MpuP_RegionSize_256M, MpuP_RegionSize_512M, MpuP_RegionSize_1G, MpuP_RegionSize_2G, MpuP_RegionSize_4G }
	Enum's to represent different possible MPU region size. More...

Enumeration Type Documentation

◆ MpuP_AccessPerm

enum MpuP_AccessPerm

Enum's to represent different types of access permissions that are possible for a given MPU region.

Enumerator
MpuP_AP_ALL_BLOCK	All accesses are blocked
MpuP_AP_S_RW	Only RD+WR supervisor mode accesses are allowed
MpuP_AP_S_RW_U_R	RD+WR supervisor and RD only user mode accesses are allowed
MpuP_AP_ALL_RW	All RD+WR accesses are allowed
MpuP_AP_S_R	Only RD supervisor mode accesses are allowed
MpuP_AP_ALL_R	All RD accesses are allowed

◆ MpuP_RegionSize

enum MpuP_RegionSize

Enum's to represent different possible MPU region size.

Enumerator
MpuP_RegionSize_32
MpuP_RegionSize_64
MpuP_RegionSize_128
MpuP_RegionSize_256
MpuP_RegionSize_512
MpuP_RegionSize_1K
MpuP_RegionSize_2K
MpuP_RegionSize_4K
MpuP_RegionSize_8K
MpuP_RegionSize_16K
MpuP_RegionSize_32K
MpuP_RegionSize_64K
MpuP_RegionSize_128K
MpuP_RegionSize_256K
MpuP_RegionSize_512K
MpuP_RegionSize_1M
MpuP_RegionSize_2M
MpuP_RegionSize_4M
MpuP_RegionSize_8M
MpuP_RegionSize_16M
MpuP_RegionSize_32M
MpuP_RegionSize_64M
MpuP_RegionSize_128M
MpuP_RegionSize_256M
MpuP_RegionSize_512M
MpuP_RegionSize_1G
MpuP_RegionSize_2G
MpuP_RegionSize_4G

Function Documentation

◆ MpuP_RegionAttrs_init()

void MpuP_RegionAttrs_init ( MpuP_RegionAttrs * region )

Set default values to MpuP_RegionAttrs.

Strongly recommended to be called before seting values in MpuP_RegionAttrs

Parameters

region [out] parameter structure to set to default

◆ MpuP_setRegion()

void MpuP_setRegion	(	uint32_t	regionNum,
		void *	addr,
		uint32_t	size,
		MpuP_RegionAttrs *	attrs
	)

Setup a region in the MPU.

Note: Refer to ARMv7-R or ARMv7-M architecture manual for more details; Recommended to disable MPU and disable cache before setting up MPU regions

Parameters

regionNum	[in] region to setup
addr	[in] region start address, MUST aligned to region size
size	[in] region size, see MpuP_RegionSize
attrs	[in] region attrs, see MpuP_RegionAttrs

◆ MpuP_enable()

void MpuP_enable ( )

Enable MPU sub-system using the region that are setup using MpuP_setRegion.

◆ MpuP_disable()

void MpuP_disable ( )

Disable MPU sub-system.

◆ MpuP_isEnable()

uint32_t MpuP_isEnable ( )

Check if MPU sub-system is enabled.

Returns: 0: MPU sub-system is disabled, 1: MPU sub-system is enabled

◆ MpuP_init()

void MpuP_init ( )

Initialize MPU sub-system, called by SysConfig, not to be called by end users.