CpuMmuCommon.c File Reference

#include "CpuDxe.h"

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Functions
EFI_STATUS	SearchGcdMemorySpaces (IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap, IN UINTN NumberOfDescriptors, IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, OUT UINTN *StartIndex, OUT UINTN *EndIndex)
EFI_STATUS	SetGcdMemorySpaceAttributes (IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap, IN UINTN NumberOfDescriptors, IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 Attributes)
EFI_STATUS EFIAPI	CpuSetMemoryAttributes (IN EFI_CPU_ARCH_PROTOCOL *This, IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 EfiAttributes)

Detailed Description

Copyright (c) 2013, ARM Limited. All rights reserved. Copyright (c) 2017, Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CpuMmuCommon.c.

Function Documentation

CpuSetMemoryAttributes()

EFI_STATUS EFIAPI CpuSetMemoryAttributes	(	IN EFI_CPU_ARCH_PROTOCOL *	This,
		IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64	EfiAttributes
	)

This function modifies the attributes for the memory region specified by BaseAddress and Length from their current attributes to the attributes specified by Attributes.

Parameters

This	The EFI_CPU_ARCH_PROTOCOL instance.
BaseAddress	The physical address that is the start address of a memory region.
Length	The size in bytes of the memory region.
Attributes	The bit mask of attributes to set for the memory region.

Return values

EFI_SUCCESS	The attributes were set for the memory region.
EFI_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
EFI_INVALID_PARAMETER	Length is zero.
EFI_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource range.
EFI_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length. The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length.

Definition at line 228 of file CpuMmuCommon.c.

SearchGcdMemorySpaces()

EFI_STATUS SearchGcdMemorySpaces	(	IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *	MemorySpaceMap,
		IN UINTN	NumberOfDescriptors,
		IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		OUT UINTN *	StartIndex,
		OUT UINTN *	EndIndex
	)

Searches memory descriptors covered by given memory range.

This function searches into the Gcd Memory Space for descriptors (from StartIndex to EndIndex) that contains the memory range specified by BaseAddress and Length.

Parameters

MemorySpaceMap	Gcd Memory Space Map as array.
NumberOfDescriptors	Number of descriptors in map.
BaseAddress	BaseAddress for the requested range.
Length	Length for the requested range.
StartIndex	Start index into the Gcd Memory Space Map.
EndIndex	End index into the Gcd Memory Space Map.

Return values

EFI_SUCCESS	Search successfully.
EFI_NOT_FOUND	The requested descriptors does not exist.

Definition at line 31 of file CpuMmuCommon.c.

SetGcdMemorySpaceAttributes()

EFI_STATUS SetGcdMemorySpaceAttributes	(	IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *	MemorySpaceMap,
		IN UINTN	NumberOfDescriptors,
		IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64	Attributes
	)

Sets the attributes for a specified range in Gcd Memory Space Map.

This function sets the attributes for a specified range in Gcd Memory Space Map.

Parameters

MemorySpaceMap	Gcd Memory Space Map as array
NumberOfDescriptors	Number of descriptors in map
BaseAddress	BaseAddress for the range
Length	Length for the range
Attributes	Attributes to set

Return values

EFI_SUCCESS	Memory attributes set successfully
EFI_NOT_FOUND	The specified range does not exist in Gcd Memory Space

Definition at line 79 of file CpuMmuCommon.c.