ARM MPU memory attributes

Files
file	memory-attr-arm.h
	ARM MPU memory attribute DT binding definitions (legacy).

Macros
#define	DT_MEM_ARM_GET(x)
	Extract ARM MPU-specific bits from a full zephyr,memory-attr value.
#define	DT_MEM_ARM_MPU_RAM   DT_MEM_ARM(ATTR_MPU_RAM)
	Standard cacheable RAM region.
#define	DT_MEM_ARM_MPU_RAM_NOCACHE   DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE)
	Non-cacheable RAM region.
#define	DT_MEM_ARM_MPU_FLASH   DT_MEM_ARM(ATTR_MPU_FLASH)
	Flash (ROM) memory region.
#define	DT_MEM_ARM_MPU_PPB   DT_MEM_ARM(ATTR_MPU_PPB)
	Private Peripheral Bus region.
#define	DT_MEM_ARM_MPU_IO   DT_MEM_ARM(ATTR_MPU_IO)
	I/O (peripheral) memory region.
#define	DT_MEM_ARM_MPU_EXTMEM   DT_MEM_ARM(ATTR_MPU_EXTMEM)
	External memory region.
#define	DT_MEM_ARM_MPU_RAM_PXN   DT_MEM_ARM(ATTR_MPU_RAM_PXN)
	RAM region with Privileged Execute Never attribute.
#define	DT_MEM_ARM_MPU_DEVICE   DT_MEM_ARM(ATTR_MPU_DEVICE)
	Device memory region.
#define	DT_MEM_ARM_MPU_RAM_WT   DT_MEM_ARM(ATTR_MPU_RAM_WT)
	Write-through cacheable RAM region.
#define	DT_MEM_ARM_MPU_UNKNOWN   DT_MEM_ARCH_ATTR_UNKNOWN
	Unknown or unsupported ARM MPU memory type.

Detailed Description

Note

This is legacy and should NOT be extended further. New MPU region types must rely on the generic memory attributes.

Macro Definition Documentation

DT_MEM_ARM_GET

#define DT_MEM_ARM_GET

(

x

)

#include <memory-attr-arm.h>

Value:

((x) & DT_MEM_ARM_MASK)

Extract ARM MPU-specific bits from a full zephyr,memory-attr value.

Parameters

x	Value to extract ARM MPU-specific memory attribute bits from.

Returns

ARM MPU-specific memory attribute bits.

DT_MEM_ARM_MPU_DEVICE

#define DT_MEM_ARM_MPU_DEVICE   DT_MEM_ARM(ATTR_MPU_DEVICE)

#include <memory-attr-arm.h>

Device memory region.

DT_MEM_ARM_MPU_EXTMEM

#define DT_MEM_ARM_MPU_EXTMEM   DT_MEM_ARM(ATTR_MPU_EXTMEM)

#include <memory-attr-arm.h>

External memory region.

DT_MEM_ARM_MPU_FLASH

#define DT_MEM_ARM_MPU_FLASH   DT_MEM_ARM(ATTR_MPU_FLASH)

#include <memory-attr-arm.h>

Flash (ROM) memory region.

DT_MEM_ARM_MPU_IO

#define DT_MEM_ARM_MPU_IO   DT_MEM_ARM(ATTR_MPU_IO)

#include <memory-attr-arm.h>

I/O (peripheral) memory region.

DT_MEM_ARM_MPU_PPB

#define DT_MEM_ARM_MPU_PPB   DT_MEM_ARM(ATTR_MPU_PPB)

#include <memory-attr-arm.h>

Private Peripheral Bus region.

DT_MEM_ARM_MPU_RAM

#define DT_MEM_ARM_MPU_RAM   DT_MEM_ARM(ATTR_MPU_RAM)

#include <memory-attr-arm.h>

Standard cacheable RAM region.

DT_MEM_ARM_MPU_RAM_NOCACHE

#define DT_MEM_ARM_MPU_RAM_NOCACHE   DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE)

#include <memory-attr-arm.h>

Non-cacheable RAM region.

DT_MEM_ARM_MPU_RAM_PXN

#define DT_MEM_ARM_MPU_RAM_PXN   DT_MEM_ARM(ATTR_MPU_RAM_PXN)

#include <memory-attr-arm.h>

RAM region with Privileged Execute Never attribute.

DT_MEM_ARM_MPU_RAM_WT

#define DT_MEM_ARM_MPU_RAM_WT   DT_MEM_ARM(ATTR_MPU_RAM_WT)

#include <memory-attr-arm.h>

Write-through cacheable RAM region.

DT_MEM_ARM_MPU_UNKNOWN

#define DT_MEM_ARM_MPU_UNKNOWN   DT_MEM_ARCH_ATTR_UNKNOWN

#include <memory-attr-arm.h>

Unknown or unsupported ARM MPU memory type.