#include <Uefi.h>
#include <Register/Intel/Cpuid.h>
#include <Register/Intel/Msr.h>
#include <Library/MtrrLib.h>
#include <Library/BaseLib.h>
#include <Library/CpuLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>

Data Structures
struct	MTRR_CONTEXT

struct	MTRR_LIB_ADDRESS

Macros
#define	OR_SEED 0x0101010101010101ull

#define	CLEAR_SEED 0xFFFFFFFFFFFFFFFFull

#define	MAX_WEIGHT MAX_UINT8

#define	SCRATCH_BUFFER_SIZE (4 * SIZE_4KB)

#define	MTRR_LIB_ASSERT_ALIGNED(B, L) ASSERT ((B & ~(L - 1)) == B);

#define	M(x, y) ((x) * VertexCount + (y))

#define	O(x, y) ((y) * VertexCount + (x))

Functions
VOID	MtrrDebugPrintAllMtrrsWorker (IN MTRR_SETTINGS *MtrrSetting)

BOOLEAN	MtrrLibIsMtrrSupported (OUT BOOLEAN FixedMtrrSupported OPTIONAL, OUT UINT32 VariableMtrrCount OPTIONAL)

UINT32	GetVariableMtrrCountWorker (VOID)

UINT32 EFIAPI	GetVariableMtrrCount (VOID)

UINT32	GetFirmwareVariableMtrrCountWorker (VOID)

UINT32 EFIAPI	GetFirmwareVariableMtrrCount (VOID)

MTRR_MEMORY_CACHE_TYPE	MtrrGetDefaultMemoryTypeWorker (IN CONST MTRR_SETTINGS *MtrrSetting)

MTRR_MEMORY_CACHE_TYPE EFIAPI	MtrrGetDefaultMemoryType (VOID)

VOID	MtrrLibPreMtrrChange (OUT MTRR_CONTEXT *MtrrContext)

VOID	MtrrLibPostMtrrChangeEnableCache (IN MTRR_CONTEXT *MtrrContext)

VOID	MtrrLibPostMtrrChange (IN MTRR_CONTEXT *MtrrContext)

MTRR_FIXED_SETTINGS *	MtrrGetFixedMtrrWorker (OUT MTRR_FIXED_SETTINGS *FixedSettings)

MTRR_FIXED_SETTINGS *EFIAPI	MtrrGetFixedMtrr (OUT MTRR_FIXED_SETTINGS *FixedSettings)

MTRR_VARIABLE_SETTINGS *	MtrrGetVariableMtrrWorker (IN MTRR_SETTINGS MtrrSetting, IN UINT32 VariableMtrrCount, OUT MTRR_VARIABLE_SETTINGS VariableSettings)

RETURN_STATUS	MtrrLibProgramFixedMtrr (IN MTRR_MEMORY_CACHE_TYPE Type, IN OUT UINT64 Base, IN OUT UINT64 Length, IN OUT UINT32 LastMsrIndex, OUT UINT64 ClearMask, OUT UINT64 *OrMask)

UINT32	MtrrGetMemoryAttributeInVariableMtrrWorker (IN MTRR_VARIABLE_SETTINGS VariableSettings, IN UINTN VariableMtrrCount, IN UINT64 MtrrValidBitsMask, IN UINT64 MtrrValidAddressMask, OUT VARIABLE_MTRR VariableMtrr)

UINT32	MtrrLibGetRawVariableRanges (IN CONST MTRR_VARIABLE_SETTINGS VariableSettings, IN UINTN VariableMtrrCount, IN UINT64 MtrrValidBitsMask, IN UINT64 MtrrValidAddressMask, OUT MTRR_MEMORY_RANGE VariableMtrr)

UINT32 EFIAPI	MtrrGetMemoryAttributeInVariableMtrr (IN UINT64 MtrrValidBitsMask, IN UINT64 MtrrValidAddressMask, OUT VARIABLE_MTRR *VariableMtrr)

UINT64	MtrrLibBiggestAlignment (UINT64 Address, UINT64 Alignment0)

BOOLEAN	MtrrLibTypeLeftPrecedeRight (IN MTRR_MEMORY_CACHE_TYPE Left, IN MTRR_MEMORY_CACHE_TYPE Right)

VOID	MtrrLibInitializeMtrrMask (OUT UINT64 MtrrValidBitsMask, OUT UINT64 MtrrValidAddressMask)

MTRR_MEMORY_CACHE_TYPE	MtrrLibPrecedence (IN MTRR_MEMORY_CACHE_TYPE MtrrType1, IN MTRR_MEMORY_CACHE_TYPE MtrrType2)

MTRR_MEMORY_CACHE_TYPE	MtrrGetMemoryAttributeByAddressWorker (IN MTRR_SETTINGS *MtrrSetting, IN PHYSICAL_ADDRESS Address)

MTRR_MEMORY_CACHE_TYPE EFIAPI	MtrrGetMemoryAttribute (IN PHYSICAL_ADDRESS Address)

RETURN_STATUS	MtrrLibSetMemoryType (IN MTRR_MEMORY_RANGE Ranges, IN UINTN Capacity, IN OUT UINTN Count, IN UINT64 BaseAddress, IN UINT64 Length, IN MTRR_MEMORY_CACHE_TYPE Type)

UINT8	MtrrLibGetNumberOfTypes (IN CONST MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCount, IN UINT64 BaseAddress, IN UINT64 Length, IN OUT UINT8 Types OPTIONAL)

VOID	MtrrLibCalculateLeastMtrrs (IN UINT16 VertexCount, IN MTRR_LIB_ADDRESS Vertices, IN OUT CONST UINT8 Weight, IN UINT16 Start, IN UINT16 Stop, IN BOOLEAN IncludeOptional)

RETURN_STATUS	MtrrLibAppendVariableMtrr (IN OUT MTRR_MEMORY_RANGE Mtrrs, IN UINT32 MtrrCapacity, IN OUT UINT32 MtrrCount, IN UINT64 BaseAddress, IN UINT64 Length, IN MTRR_MEMORY_CACHE_TYPE Type)

MTRR_MEMORY_CACHE_TYPE	MtrrLibLowestType (IN UINT8 TypeBits)

RETURN_STATUS	MtrrLibCalculateSubtractivePath (IN MTRR_MEMORY_CACHE_TYPE DefaultType, IN UINT64 A0, IN CONST MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCount, IN UINT16 VertexCount, IN MTRR_LIB_ADDRESS Vertices, IN OUT UINT8 Weight, IN UINT16 Start, IN UINT16 Stop, IN UINT8 Types, IN UINT8 TypeCount, IN OUT MTRR_MEMORY_RANGE Mtrrs OPTIONAL, IN UINT32 MtrrCapacity OPTIONAL, IN OUT UINT32 *MtrrCount OPTIONAL)

RETURN_STATUS	MtrrLibCalculateMtrrs (IN MTRR_MEMORY_CACHE_TYPE DefaultType, IN UINT64 A0, IN CONST MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCount, IN VOID Scratch, IN OUT UINTN ScratchSize, IN OUT MTRR_MEMORY_RANGE Mtrrs, IN UINT32 MtrrCapacity, IN OUT UINT32 *MtrrCount)

RETURN_STATUS	MtrrLibApplyFixedMtrrs (IN CONST MTRR_FIXED_SETTINGS Fixed, IN OUT MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCapacity, IN OUT UINTN *RangeCount)

RETURN_STATUS	MtrrLibApplyVariableMtrrs (IN CONST MTRR_MEMORY_RANGE VariableMtrr, IN UINT32 VariableMtrrCount, IN OUT MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCapacity, IN OUT UINTN *RangeCount)

UINT8	MtrrLibGetCompatibleTypes (IN CONST MTRR_MEMORY_RANGE *Ranges, IN UINTN RangeCount)

VOID	MtrrLibMergeVariableMtrr (MTRR_MEMORY_RANGE DstMtrrs, UINT32 DstMtrrCount, MTRR_MEMORY_RANGE SrcMtrrs, UINT32 SrcMtrrCount, BOOLEAN *Modified)

RETURN_STATUS	MtrrLibSetMemoryRanges (IN MTRR_MEMORY_CACHE_TYPE DefaultType, IN UINT64 A0, IN MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCount, IN VOID Scratch, IN OUT UINTN ScratchSize, OUT MTRR_MEMORY_RANGE VariableMtrr, IN UINT32 VariableMtrrCapacity, OUT UINT32 *VariableMtrrCount)

RETURN_STATUS	MtrrLibSetBelow1MBMemoryAttribute (IN OUT UINT64 ClearMasks, IN OUT UINT64 OrMasks, IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN MTRR_MEMORY_CACHE_TYPE Type)

RETURN_STATUS EFIAPI	MtrrSetMemoryAttributesInMtrrSettings (IN OUT MTRR_SETTINGS MtrrSetting, IN VOID Scratch, IN OUT UINTN ScratchSize, IN CONST MTRR_MEMORY_RANGE Ranges, IN UINTN RangeCount)

RETURN_STATUS EFIAPI	MtrrSetMemoryAttributeInMtrrSettings (IN OUT MTRR_SETTINGS *MtrrSetting, IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN MTRR_MEMORY_CACHE_TYPE Attribute)

RETURN_STATUS EFIAPI	MtrrSetMemoryAttribute (IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN MTRR_MEMORY_CACHE_TYPE Attribute)

VOID	MtrrSetVariableMtrrWorker (IN MTRR_VARIABLE_SETTINGS *VariableSettings)

VOID	MtrrSetFixedMtrrWorker (IN MTRR_FIXED_SETTINGS *FixedSettings)

MTRR_SETTINGS *EFIAPI	MtrrGetAllMtrrs (OUT MTRR_SETTINGS *MtrrSetting)

MTRR_SETTINGS *EFIAPI	MtrrSetAllMtrrs (IN MTRR_SETTINGS *MtrrSetting)

BOOLEAN EFIAPI	IsMtrrSupported (VOID)

RETURN_STATUS EFIAPI	MtrrGetMemoryAttributesInMtrrSettings (IN CONST MTRR_SETTINGS MtrrSetting OPTIONAL, OUT MTRR_MEMORY_RANGE Ranges, IN OUT UINTN *RangeCount)

VOID EFIAPI	MtrrDebugPrintAllMtrrs (VOID)

Variables
CONST FIXED_MTRR	mMtrrLibFixedMtrrTable []

GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 *	mMtrrMemoryCacheTypeShortName []

Detailed Description

MTRR setting library

Note:: Most of services in this library instance are suggested to be invoked by BSP only, except for MtrrSetAllMtrrs() which is used to sync BSP's MTRR setting to APs.

Copyright (c) 2008 - 2023, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file MtrrLib.c.

Macro Definition Documentation

◆ CLEAR_SEED

#define CLEAR_SEED 0xFFFFFFFFFFFFFFFFull

Definition at line 24 of file MtrrLib.c.

◆ M

#define M	(	x,
		y
	)	((x) * VertexCount + (y))

Definition at line 29 of file MtrrLib.c.

◆ MAX_WEIGHT

#define MAX_WEIGHT MAX_UINT8

Definition at line 25 of file MtrrLib.c.

◆ MTRR_LIB_ASSERT_ALIGNED

#define MTRR_LIB_ASSERT_ALIGNED	(	B,
		L
	)	ASSERT ((B & ~(L - 1)) == B);

Definition at line 27 of file MtrrLib.c.

◆ O

#define O	(	x,
		y
	)	((y) * VertexCount + (x))

Definition at line 30 of file MtrrLib.c.

◆ OR_SEED

#define OR_SEED 0x0101010101010101ull

Definition at line 23 of file MtrrLib.c.

◆ SCRATCH_BUFFER_SIZE

#define SCRATCH_BUFFER_SIZE (4 * SIZE_4KB)

Definition at line 26 of file MtrrLib.c.

Function Documentation

◆ GetFirmwareVariableMtrrCount()

UINT32 EFIAPI GetFirmwareVariableMtrrCount ( VOID )

Returns the firmware usable variable MTRR count for the CPU.

Returns: Firmware usable variable MTRR count

Definition at line 277 of file MtrrLib.c.

◆ GetFirmwareVariableMtrrCountWorker()

UINT32 GetFirmwareVariableMtrrCountWorker ( VOID )

Worker function returns the firmware usable variable MTRR count for the CPU.

Returns: Firmware usable variable MTRR count

Definition at line 253 of file MtrrLib.c.

◆ GetVariableMtrrCount()

UINT32 EFIAPI GetVariableMtrrCount ( VOID )

Returns the variable MTRR count for the CPU.

Returns: Variable MTRR count

Definition at line 235 of file MtrrLib.c.

◆ GetVariableMtrrCountWorker()

UINT32 GetVariableMtrrCountWorker ( VOID )

Worker function returns the variable MTRR count for the CPU.

Returns: Variable MTRR count

Definition at line 216 of file MtrrLib.c.

◆ IsMtrrSupported()

BOOLEAN EFIAPI IsMtrrSupported ( VOID )

Checks if MTRR is supported.

Return values

TRUE	MTRR is supported.
FALSE	MTRR is not supported.

Definition at line 2960 of file MtrrLib.c.

◆ MtrrDebugPrintAllMtrrs()

VOID EFIAPI MtrrDebugPrintAllMtrrs ( VOID )

This function prints all MTRRs for debugging.

Definition at line 3161 of file MtrrLib.c.

◆ MtrrDebugPrintAllMtrrsWorker()

VOID MtrrDebugPrintAllMtrrsWorker ( IN MTRR_SETTINGS * MtrrSetting )

Worker function prints all MTRRs for debugging.

If MtrrSetting is not NULL, print MTRR settings from input MTRR settings buffer. If MtrrSetting is NULL, print MTRR settings from MTRRs.

Parameters

MtrrSetting A buffer holding all MTRRs content.

Definition at line 3074 of file MtrrLib.c.

◆ MtrrGetAllMtrrs()

MTRR_SETTINGS *EFIAPI MtrrGetAllMtrrs ( OUT MTRR_SETTINGS * MtrrSetting )

This function gets the content in all MTRRs (variable and fixed)

Parameters

[out] MtrrSetting A buffer to hold all MTRRs content.

Return values

the	pointer of MtrrSetting

Definition at line 2851 of file MtrrLib.c.

◆ MtrrGetDefaultMemoryType()

MTRR_MEMORY_CACHE_TYPE EFIAPI MtrrGetDefaultMemoryType ( VOID )

Returns the default MTRR cache type for the system.

Returns: The default MTRR cache type.

Definition at line 324 of file MtrrLib.c.

◆ MtrrGetDefaultMemoryTypeWorker()

MTRR_MEMORY_CACHE_TYPE MtrrGetDefaultMemoryTypeWorker ( IN CONST MTRR_SETTINGS * MtrrSetting )

Worker function returns the default MTRR cache type for the system.

If MtrrSetting is not NULL, returns the default MTRR cache type from input MTRR settings buffer. If MtrrSetting is NULL, returns the default MTRR cache type from MSR.

Parameters

[in] MtrrSetting A buffer holding all MTRRs content.

Returns: The default MTRR cache type.

Definition at line 301 of file MtrrLib.c.

◆ MtrrGetFixedMtrr()

MTRR_FIXED_SETTINGS *EFIAPI MtrrGetFixedMtrr ( OUT MTRR_FIXED_SETTINGS * FixedSettings )

This function gets the content in fixed MTRRs

Parameters

[out] FixedSettings A buffer to hold fixed MTRRs content.

Return values

The	pointer of FixedSettings

Definition at line 474 of file MtrrLib.c.

◆ MtrrGetFixedMtrrWorker()

MTRR_FIXED_SETTINGS * MtrrGetFixedMtrrWorker ( OUT MTRR_FIXED_SETTINGS * FixedSettings )

Worker function gets the content in fixed MTRRs

Parameters

[out] FixedSettings A buffer to hold fixed MTRRs content.

Return values

The	pointer of FixedSettings

Definition at line 450 of file MtrrLib.c.

◆ MtrrGetMemoryAttribute()

MTRR_MEMORY_CACHE_TYPE EFIAPI MtrrGetMemoryAttribute ( IN PHYSICAL_ADDRESS Address )

This function will get the memory cache type of the specific address.

This function is mainly for debug purpose.

Parameters

[in] Address The specific address

Returns: Memory cache type of the specific address

Definition at line 1021 of file MtrrLib.c.

◆ MtrrGetMemoryAttributeByAddressWorker()

MTRR_MEMORY_CACHE_TYPE MtrrGetMemoryAttributeByAddressWorker	(	IN MTRR_SETTINGS *	MtrrSetting,
		IN PHYSICAL_ADDRESS	Address
	)

Worker function will get the memory cache type of the specific address.

If MtrrSetting is not NULL, gets the memory cache type from input MTRR settings buffer. If MtrrSetting is NULL, gets the memory cache type from MTRRs.

Parameters

[in]	MtrrSetting	A buffer holding all MTRRs content.
[in]	Address	The specific address

Returns: Memory cache type of the specific address

Definition at line 911 of file MtrrLib.c.

◆ MtrrGetMemoryAttributeInVariableMtrr()

UINT32 EFIAPI MtrrGetMemoryAttributeInVariableMtrr	(	IN UINT64	MtrrValidBitsMask,
		IN UINT64	MtrrValidAddressMask,
		OUT VARIABLE_MTRR *	VariableMtrr
	)

Gets the attribute of variable MTRRs.

This function shadows the content of variable MTRRs into an internal array: VariableMtrr.

Parameters

[in]	MtrrValidBitsMask	The mask for the valid bit of the MTRR
[in]	MtrrValidAddressMask	The valid address mask for MTRR
[out]	VariableMtrr	The array to shadow variable MTRRs content

Returns: The return value of this parameter indicates the number of MTRRs which has been used.

Definition at line 740 of file MtrrLib.c.

◆ MtrrGetMemoryAttributeInVariableMtrrWorker()

UINT32 MtrrGetMemoryAttributeInVariableMtrrWorker	(	IN MTRR_VARIABLE_SETTINGS *	VariableSettings,
		IN UINTN	VariableMtrrCount,
		IN UINT64	MtrrValidBitsMask,
		IN UINT64	MtrrValidAddressMask,
		OUT VARIABLE_MTRR *	VariableMtrr
	)

Worker function gets the attribute of variable MTRRs.

This function shadows the content of variable MTRRs into an internal array: VariableMtrr.

Parameters

[in]	VariableSettings	The variable MTRR values to shadow
[in]	VariableMtrrCount	The number of variable MTRRs
[in]	MtrrValidBitsMask	The mask for the valid bit of the MTRR
[in]	MtrrValidAddressMask	The valid address mask for MTRR
[out]	VariableMtrr	The array to shadow variable MTRRs content

Returns: Number of MTRRs which has been used.

Definition at line 656 of file MtrrLib.c.

◆ MtrrGetMemoryAttributesInMtrrSettings()

RETURN_STATUS EFIAPI MtrrGetMemoryAttributesInMtrrSettings	(	IN CONST MTRR_SETTINGS *MtrrSetting	OPTIONAL,
		OUT MTRR_MEMORY_RANGE *	Ranges,
		IN OUT UINTN *	RangeCount
	)

This function returns a Ranges array containing the memory cache types of all memory addresses.

Parameters

[in]	MtrrSetting	MTRR setting buffer to parse.
[out]	Ranges	Pointer to an array of MTRR_MEMORY_RANGE.
[in,out]	RangeCount	Count of MTRR_MEMORY_RANGE. On input, the maximum entries the Ranges can hold. On output, the actual entries that the function returns.

Return values

RETURN_INVALID_PARAMETER	RangeCount is NULL.
RETURN_INVALID_PARAMETER	*RangeCount is not 0 but Ranges is NULL.
RETURN_BUFFER_TOO_SMALL	*RangeCount is too small.
RETURN_SUCCESS	Ranges are successfully returned.

Definition at line 2984 of file MtrrLib.c.

◆ MtrrGetVariableMtrrWorker()

MTRR_VARIABLE_SETTINGS * MtrrGetVariableMtrrWorker	(	IN MTRR_SETTINGS *	MtrrSetting,
		IN UINT32	VariableMtrrCount,
		OUT MTRR_VARIABLE_SETTINGS *	VariableSettings
	)

Worker function will get the raw value in variable MTRRs

If MtrrSetting is not NULL, gets the variable MTRRs raw value from input MTRR settings buffer. If MtrrSetting is NULL, gets the variable MTRRs raw value from MTRRs.

Parameters

[in]	MtrrSetting	A buffer holding all MTRRs content.
[in]	VariableMtrrCount	Number of variable MTRRs.
[out]	VariableSettings	A buffer to hold variable MTRRs content.

Returns: The VariableSettings input pointer

Definition at line 504 of file MtrrLib.c.

◆ MtrrLibAppendVariableMtrr()

RETURN_STATUS MtrrLibAppendVariableMtrr	(	IN OUT MTRR_MEMORY_RANGE *	Mtrrs,
		IN UINT32	MtrrCapacity,
		IN OUT UINT32 *	MtrrCount,
		IN UINT64	BaseAddress,
		IN UINT64	Length,
		IN MTRR_MEMORY_CACHE_TYPE	Type
	)

Append the MTRR setting to MTRR setting array.

Parameters

Mtrrs	Array holding all MTRR settings.
MtrrCapacity	Capacity of the MTRR array.
MtrrCount	The count of MTRR settings in array.
BaseAddress	Base address.
Length	Length.
Type	Memory type.

Return values

RETURN_SUCCESS	MTRR setting is appended to array.
RETURN_OUT_OF_RESOURCES	Array is full.

Definition at line 1306 of file MtrrLib.c.

◆ MtrrLibApplyFixedMtrrs()

RETURN_STATUS MtrrLibApplyFixedMtrrs	(	IN CONST MTRR_FIXED_SETTINGS *	Fixed,
		IN OUT MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCapacity,
		IN OUT UINTN *	RangeCount
	)

Apply the fixed MTRR settings to memory range array.

Parameters

Fixed	The fixed MTRR settings.
Ranges	Return the memory range array holding memory type settings for all memory address.
RangeCapacity	The capacity of memory range array.
RangeCount	Return the count of memory range.

Return values

RETURN_SUCCESS	The memory range array is returned successfully.
RETURN_OUT_OF_RESOURCES	The count of memory ranges exceeds capacity.

Definition at line 1833 of file MtrrLib.c.

◆ MtrrLibApplyVariableMtrrs()

RETURN_STATUS MtrrLibApplyVariableMtrrs	(	IN CONST MTRR_MEMORY_RANGE *	VariableMtrr,
		IN UINT32	VariableMtrrCount,
		IN OUT MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCapacity,
		IN OUT UINTN *	RangeCount
	)

Apply the variable MTRR settings to memory range array.

Parameters

VariableMtrr	The variable MTRR array.
VariableMtrrCount	The count of variable MTRRs.
Ranges	Return the memory range array with new MTRR settings applied.
RangeCapacity	The capacity of memory range array.
RangeCount	Return the count of memory range.

Return values

RETURN_SUCCESS	The memory range array is returned successfully.
RETURN_OUT_OF_RESOURCES	The count of memory ranges exceeds capacity.

Definition at line 1884 of file MtrrLib.c.

◆ MtrrLibBiggestAlignment()

UINT64 MtrrLibBiggestAlignment	(	UINT64	Address,
		UINT64	Alignment0
	)

Return the biggest alignment (lowest set bit) of address. The function is equivalent to: 1 << LowBitSet64 (Address).

Parameters

Address	The address to return the alignment.
Alignment0	The alignment to return when Address is 0.

Returns: The least alignment of the Address.

Definition at line 777 of file MtrrLib.c.

◆ MtrrLibCalculateLeastMtrrs()

VOID MtrrLibCalculateLeastMtrrs	(	IN UINT16	VertexCount,
		IN MTRR_LIB_ADDRESS *	Vertices,
		IN OUT CONST UINT8 *	Weight,
		IN UINT16	Start,
		IN UINT16	Stop,
		IN BOOLEAN	IncludeOptional
	)

Calculate the least MTRR number from vertex Start to Stop and update the Previous of all vertices from Start to Stop is updated to reflect how the memory range is covered by MTRR.

Parameters

VertexCount	The count of vertices in the graph.
Vertices	Array holding all vertices.
Weight	2-dimention array holding weights between vertices.
Start	Start vertex.
Stop	Stop vertex.
IncludeOptional	TRUE to count the optional weight.

Definition at line 1228 of file MtrrLib.c.

◆ MtrrLibCalculateMtrrs()

RETURN_STATUS MtrrLibCalculateMtrrs	(	IN MTRR_MEMORY_CACHE_TYPE	DefaultType,
		IN UINT64	A0,
		IN CONST MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount,
		IN VOID *	Scratch,
		IN OUT UINTN *	ScratchSize,
		IN OUT MTRR_MEMORY_RANGE *	Mtrrs,
		IN UINT32	MtrrCapacity,
		IN OUT UINT32 *	MtrrCount
	)

Calculate MTRR settings to cover the specified memory ranges.

Parameters

DefaultType	Default memory type.
A0	Alignment to use when base address is 0.
Ranges	Memory range array holding the memory type settings for all memory address.
RangeCount	Count of memory ranges.
Scratch	A temporary scratch buffer that is used to perform the calculation. This is an optional parameter that may be NULL.
ScratchSize	Pointer to the size in bytes of the scratch buffer. It may be updated to the actual required size when the calculation needs more scratch buffer.
Mtrrs	Array holding all MTRR settings.
MtrrCapacity	Capacity of the MTRR array.
MtrrCount	The count of MTRR settings in array.

Return values

RETURN_SUCCESS	Variable MTRRs are allocated successfully.
RETURN_OUT_OF_RESOURCES	Count of variable MTRRs exceeds capacity.
RETURN_BUFFER_TOO_SMALL	The scratch buffer is too small for MTRR calculation.

Definition at line 1592 of file MtrrLib.c.

◆ MtrrLibCalculateSubtractivePath()

RETURN_STATUS MtrrLibCalculateSubtractivePath	(	IN MTRR_MEMORY_CACHE_TYPE	DefaultType,
		IN UINT64	A0,
		IN CONST MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount,
		IN UINT16	VertexCount,
		IN MTRR_LIB_ADDRESS *	Vertices,
		IN OUT UINT8 *	Weight,
		IN UINT16	Start,
		IN UINT16	Stop,
		IN UINT8	Types,
		IN UINT8	TypeCount,
		IN OUT MTRR_MEMORY_RANGE *Mtrrs	OPTIONAL,
		IN UINT32 MtrrCapacity	OPTIONAL,
		IN OUT UINT32 *MtrrCount	OPTIONAL
	)

Calculate the subtractive path from vertex Start to Stop.

Parameters

DefaultType	Default memory type.
A0	Alignment to use when base address is 0.
Ranges	Array holding memory type settings for all memory regions.
RangeCount	The count of memory ranges the array holds.
VertexCount	The count of vertices in the graph.
Vertices	Array holding all vertices.
Weight	2-dimention array holding weights between vertices.
Start	Start vertex.
Stop	Stop vertex.
Types	Type bit mask of memory range from Start to Stop.
TypeCount	Number of different memory types from Start to Stop.
Mtrrs	Array holding all MTRR settings.
MtrrCapacity	Capacity of the MTRR array.
MtrrCount	The count of MTRR settings in array.

Return values

RETURN_SUCCESS	The subtractive path is calculated successfully.
RETURN_OUT_OF_RESOURCES	The MTRR setting array is full.

Definition at line 1370 of file MtrrLib.c.

◆ MtrrLibGetCompatibleTypes()

UINT8 MtrrLibGetCompatibleTypes	(	IN CONST MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount
	)

Return the memory type bit mask that's compatible to first type in the Ranges.

Parameters

Ranges	Memory range array holding the memory type settings for all memory address.
RangeCount	Count of memory ranges.

Returns: Compatible memory type bit mask.

Definition at line 1973 of file MtrrLib.c.

◆ MtrrLibGetNumberOfTypes()

UINT8 MtrrLibGetNumberOfTypes	(	IN CONST MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount,
		IN UINT64	BaseAddress,
		IN UINT64	Length,
		IN OUT UINT8 *Types	OPTIONAL
	)

Return the number of memory types in range [BaseAddress, BaseAddress + Length).

Parameters

Ranges	Array holding memory type settings for all memory regions.
RangeCount	The count of memory ranges the array holds.
BaseAddress	Base address.
Length	Length.
Types	Return bit mask to indicate all memory types in the specified range.

Return values

Number of memory types.

Definition at line 1175 of file MtrrLib.c.

◆ MtrrLibGetRawVariableRanges()

UINT32 MtrrLibGetRawVariableRanges	(	IN CONST MTRR_VARIABLE_SETTINGS *	VariableSettings,
		IN UINTN	VariableMtrrCount,
		IN UINT64	MtrrValidBitsMask,
		IN UINT64	MtrrValidAddressMask,
		OUT MTRR_MEMORY_RANGE *	VariableMtrr
	)

Convert variable MTRRs to a RAW MTRR_MEMORY_RANGE array. One MTRR_MEMORY_RANGE element is created for each MTRR setting. The routine doesn't remove the overlap or combine the near-by region.

Parameters

[in]	VariableSettings	The variable MTRR values to shadow
[in]	VariableMtrrCount	The number of variable MTRRs
[in]	MtrrValidBitsMask	The mask for the valid bit of the MTRR
[in]	MtrrValidAddressMask	The valid address mask for MTRR
[out]	VariableMtrr	The array to shadow variable MTRRs content

Returns: Number of MTRRs which has been used.

Definition at line 699 of file MtrrLib.c.

◆ MtrrLibInitializeMtrrMask()

VOID MtrrLibInitializeMtrrMask	(	OUT UINT64 *	MtrrValidBitsMask,
		OUT UINT64 *	MtrrValidAddressMask
	)

Initializes the valid bits mask and valid address mask for MTRRs.

This function initializes the valid bits mask and valid address mask for MTRRs.

Parameters

[out]	MtrrValidBitsMask	The mask for the valid bit of the MTRR
[out]	MtrrValidAddressMask	The valid address mask for the MTRR

Definition at line 823 of file MtrrLib.c.

◆ MtrrLibIsMtrrSupported()

BOOLEAN MtrrLibIsMtrrSupported	(	OUT BOOLEAN *FixedMtrrSupported	OPTIONAL,
		OUT UINT32 *VariableMtrrCount	OPTIONAL
	)

Return whether MTRR is supported.

Parameters

[out]	FixedMtrrSupported	Return whether fixed MTRR is supported.
[out]	VariableMtrrCount	Return the max number of variable MTRRs.

Return values

TRUE	MTRR is supported when either fixed MTRR is supported or max number of variable MTRRs is not 0.
FALSE	MTRR is not supported when both fixed MTRR is not supported and max number of variable MTRRs is 0.

Definition at line 156 of file MtrrLib.c.

◆ MtrrLibLowestType()

MTRR_MEMORY_CACHE_TYPE MtrrLibLowestType ( IN UINT8 TypeBits )

Return the memory type that has the least precedence.

Parameters

TypeBits Bit mask of memory type.

Return values

Memory type that has the least precedence.

Definition at line 1334 of file MtrrLib.c.

◆ MtrrLibMergeVariableMtrr()

VOID MtrrLibMergeVariableMtrr	(	MTRR_MEMORY_RANGE *	DstMtrrs,
		UINT32	DstMtrrCount,
		MTRR_MEMORY_RANGE *	SrcMtrrs,
		UINT32	SrcMtrrCount,
		BOOLEAN *	Modified
	)

Overwrite the destination MTRR settings with the source MTRR settings. This routine is to make sure the modification to destination MTRR settings is as small as possible.

Parameters

DstMtrrs	Destination MTRR settings.
DstMtrrCount	Count of destination MTRR settings.
SrcMtrrs	Source MTRR settings.
SrcMtrrCount	Count of source MTRR settings.
Modified	Flag array to indicate which destination MTRR setting is modified.

Definition at line 2020 of file MtrrLib.c.

◆ MtrrLibPostMtrrChange()

VOID MtrrLibPostMtrrChange ( IN MTRR_CONTEXT * MtrrContext )

Cleaning up after programming MTRRs.

This function will do some clean up after programming MTRRs: enable MTRR caching functionality, and enable cache

Parameters

[in] MtrrContext Pointer to context to restore

Definition at line 426 of file MtrrLib.c.

◆ MtrrLibPostMtrrChangeEnableCache()

VOID MtrrLibPostMtrrChangeEnableCache ( IN MTRR_CONTEXT * MtrrContext )

Cleaning up after programming MTRRs.

This function will do some clean up after programming MTRRs: Flush all TLBs, re-enable caching, restore CR4.

Parameters

[in] MtrrContext Pointer to context to restore

Definition at line 391 of file MtrrLib.c.

◆ MtrrLibPrecedence()

MTRR_MEMORY_CACHE_TYPE MtrrLibPrecedence	(	IN MTRR_MEMORY_CACHE_TYPE	MtrrType1,
		IN MTRR_MEMORY_CACHE_TYPE	MtrrType2
	)

Determines the real attribute of a memory range.

This function is to arbitrate the real attribute of the memory when there are 2 MTRRs covers the same memory range. For further details, please refer the IA32 Software Developer's Manual, Volume 3, Section "MTRR Precedences".

Parameters

[in]	MtrrType1	The first kind of Memory type
[in]	MtrrType2	The second kind of memory type

Definition at line 876 of file MtrrLib.c.

◆ MtrrLibPreMtrrChange()

VOID MtrrLibPreMtrrChange ( OUT MTRR_CONTEXT * MtrrContext )

Preparation before programming MTRR.

This function will do some preparation for programming MTRRs: disable cache, invalid cache and disable MTRR caching functionality

Parameters

[out] MtrrContext Pointer to context to save

Definition at line 345 of file MtrrLib.c.

◆ MtrrLibProgramFixedMtrr()

RETURN_STATUS MtrrLibProgramFixedMtrr	(	IN MTRR_MEMORY_CACHE_TYPE	Type,
		IN OUT UINT64 *	Base,
		IN OUT UINT64 *	Length,
		IN OUT UINT32 *	LastMsrIndex,
		OUT UINT64 *	ClearMask,
		OUT UINT64 *	OrMask
	)

Programs fixed MTRRs registers.

Parameters

[in]	Type	The memory type to set.
[in,out]	Base	The base address of memory range.
[in,out]	Length	The length of memory range.
[in,out]	LastMsrIndex	On input, the last index of the fixed MTRR MSR to program. On return, the current index of the fixed MTRR MSR to program.
[out]	ClearMask	The bits to clear in the fixed MTRR MSR.
[out]	OrMask	The bits to set in the fixed MTRR MSR.

Return values

RETURN_SUCCESS	The cache type was updated successfully
RETURN_UNSUPPORTED	The requested range or cache type was invalid for the fixed MTRRs.

Definition at line 546 of file MtrrLib.c.

◆ MtrrLibSetBelow1MBMemoryAttribute()

RETURN_STATUS MtrrLibSetBelow1MBMemoryAttribute	(	IN OUT UINT64 *	ClearMasks,
		IN OUT UINT64 *	OrMasks,
		IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN MTRR_MEMORY_CACHE_TYPE	Type
	)

Set the below-1MB memory attribute to fixed MTRR buffer. Modified flag array indicates which fixed MTRR is modified.

Parameters

[in,out]	ClearMasks	The bits (when set) to clear in the fixed MTRR MSR.
[in,out]	OrMasks	The bits to set in the fixed MTRR MSR.
[in]	BaseAddress	Base address.
[in]	Length	Length.
[in]	Type	Memory type.

Return values

RETURN_SUCCESS	The memory attribute is set successfully.
RETURN_UNSUPPORTED	The requested range or cache type was invalid for the fixed MTRRs.

Definition at line 2279 of file MtrrLib.c.

◆ MtrrLibSetMemoryRanges()

RETURN_STATUS MtrrLibSetMemoryRanges	(	IN MTRR_MEMORY_CACHE_TYPE	DefaultType,
		IN UINT64	A0,
		IN MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount,
		IN VOID *	Scratch,
		IN OUT UINTN *	ScratchSize,
		OUT MTRR_MEMORY_RANGE *	VariableMtrr,
		IN UINT32	VariableMtrrCapacity,
		OUT UINT32 *	VariableMtrrCount
	)

Calculate the variable MTRR settings for all memory ranges.

Parameters

DefaultType	Default memory type.
A0	Alignment to use when base address is 0.
Ranges	Memory range array holding the memory type settings for all memory address.
RangeCount	Count of memory ranges.
Scratch	Scratch buffer to be used in MTRR calculation.
ScratchSize	Pointer to the size of scratch buffer.
VariableMtrr	Array holding all MTRR settings.
VariableMtrrCapacity	Capacity of the MTRR array.
VariableMtrrCount	The count of MTRR settings in array.

Return values

RETURN_SUCCESS	Variable MTRRs are allocated successfully.
RETURN_OUT_OF_RESOURCES	Count of variable MTRRs exceeds capacity.
RETURN_BUFFER_TOO_SMALL	The scratch buffer is too small for MTRR calculation. The required scratch buffer size is returned through ScratchSize.

Definition at line 2108 of file MtrrLib.c.

◆ MtrrLibSetMemoryType()

RETURN_STATUS MtrrLibSetMemoryType	(	IN MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	Capacity,
		IN OUT UINTN *	Count,
		IN UINT64	BaseAddress,
		IN UINT64	Length,
		IN MTRR_MEMORY_CACHE_TYPE	Type
	)

Update the Ranges array to change the specified range identified by BaseAddress and Length to Type.

Parameters

Ranges	Array holding memory type settings for all memory regions.
Capacity	The maximum count of memory ranges the array can hold.
Count	Return the new memory range count in the array.
BaseAddress	The base address of the memory range to change type.
Length	The length of the memory range to change type.
Type	The new type of the specified memory range.

Return values

RETURN_SUCCESS	The type of the specified memory range is changed successfully.
RETURN_ALREADY_STARTED	The type of the specified memory range equals to the desired type.
RETURN_OUT_OF_RESOURCES	The new type set causes the count of memory range exceeds capacity.

Definition at line 1051 of file MtrrLib.c.

◆ MtrrLibTypeLeftPrecedeRight()

BOOLEAN MtrrLibTypeLeftPrecedeRight	(	IN MTRR_MEMORY_CACHE_TYPE	Left,
		IN MTRR_MEMORY_CACHE_TYPE	Right
	)

Return whether the left MTRR type precedes the right MTRR type.

The MTRR type precedence rules are:

UC precedes any other type
WT precedes WB For further details, please refer the IA32 Software Developer's Manual, Volume 3, Section "MTRR Precedences".

Parameters

Left	The left MTRR type.
Right	The right MTRR type.

Return values

TRUE	Left precedes Right.
FALSE	Left doesn't precede Right.

Definition at line 805 of file MtrrLib.c.

◆ MtrrSetAllMtrrs()

MTRR_SETTINGS *EFIAPI MtrrSetAllMtrrs ( IN MTRR_SETTINGS * MtrrSetting )

This function sets all MTRRs includes Variable and Fixed.

The behavior of this function is to program everything in MtrrSetting to hardware. MTRRs might not be enabled because the enable bit is clear in MtrrSetting->MtrrDefType.

Parameters

[in] MtrrSetting A buffer holding all MTRRs content.

Return values

The	pointer of MtrrSetting

Definition at line 2908 of file MtrrLib.c.

◆ MtrrSetFixedMtrrWorker()

VOID MtrrSetFixedMtrrWorker ( IN MTRR_FIXED_SETTINGS * FixedSettings )

Worker function setting fixed MTRRs

Parameters

[in] FixedSettings A buffer to hold fixed MTRRs content.

Definition at line 2827 of file MtrrLib.c.

◆ MtrrSetMemoryAttribute()

RETURN_STATUS EFIAPI MtrrSetMemoryAttribute	(	IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN MTRR_MEMORY_CACHE_TYPE	Attribute
	)

This function attempts to set the attributes for a memory range.

Parameters

[in]	BaseAddress	The physical address that is the start address of a memory range.
[in]	Length	The size in bytes of the memory range.
[in]	Attributes	The bit mask of attributes to set for the memory range.

Return values

RETURN_SUCCESS	The attributes were set for the memory range.
RETURN_INVALID_PARAMETER	Length is zero.
RETURN_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length.
RETURN_UNSUPPORTED	The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length.
RETURN_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
RETURN_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource range. Multiple memory range attributes setting by calling this API multiple times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean the number of CPU MTRRs are too small to set such memory attributes. Pass the multiple memory range attributes to one call of MtrrSetMemoryAttributesInMtrrSettings() may succeed.
RETURN_BUFFER_TOO_SMALL	The fixed internal scratch buffer is too small for MTRR calculation. Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify external scratch buffer.

Definition at line 2782 of file MtrrLib.c.

◆ MtrrSetMemoryAttributeInMtrrSettings()

RETURN_STATUS EFIAPI MtrrSetMemoryAttributeInMtrrSettings	(	IN OUT MTRR_SETTINGS *	MtrrSetting,
		IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN MTRR_MEMORY_CACHE_TYPE	Attribute
	)

This function attempts to set the attributes into MTRR setting buffer for a memory range.

Parameters

[in,out]	MtrrSetting	MTRR setting buffer to be set.
[in]	BaseAddress	The physical address that is the start address of a memory range.
[in]	Length	The size in bytes of the memory range.
[in]	Attribute	The bit mask of attributes to set for the memory range.

Return values

RETURN_SUCCESS	The attributes were set for the memory range.
RETURN_INVALID_PARAMETER	Length is zero.
RETURN_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length.
RETURN_UNSUPPORTED	The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length.
RETURN_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
RETURN_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource range. Multiple memory range attributes setting by calling this API multiple times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean the number of CPU MTRRs are too small to set such memory attributes. Pass the multiple memory range attributes to one call of MtrrSetMemoryAttributesInMtrrSettings() may succeed.
RETURN_BUFFER_TOO_SMALL	The fixed internal scratch buffer is too small for MTRR calculation. Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify external scratch buffer.

Definition at line 2729 of file MtrrLib.c.

◆ MtrrSetMemoryAttributesInMtrrSettings()

RETURN_STATUS EFIAPI MtrrSetMemoryAttributesInMtrrSettings	(	IN OUT MTRR_SETTINGS *	MtrrSetting,
		IN VOID *	Scratch,
		IN OUT UINTN *	ScratchSize,
		IN CONST MTRR_MEMORY_RANGE *	Ranges,
		IN UINTN	RangeCount
	)

This function attempts to set the attributes into MTRR setting buffer for multiple memory ranges.

Parameters

[in,out]	MtrrSetting	MTRR setting buffer to be set.
[in]	Scratch	A temporary scratch buffer that is used to perform the calculation.
[in,out]	ScratchSize	Pointer to the size in bytes of the scratch buffer. It may be updated to the actual required size when the calculation needs more scratch buffer.
[in]	Ranges	Pointer to an array of MTRR_MEMORY_RANGE. When range overlap happens, the last one takes higher priority. When the function returns, either all the attributes are set successfully, or none of them is set.
[in]	RangeCount	Count of MTRR_MEMORY_RANGE.

Return values

RETURN_SUCCESS	The attributes were set for all the memory ranges.
RETURN_INVALID_PARAMETER	Length in any range is zero.
RETURN_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length in any range.
RETURN_UNSUPPORTED	The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length in any range.
RETURN_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource ranges.
RETURN_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
RETURN_BUFFER_TOO_SMALL	The scratch buffer is too small for MTRR calculation.

Definition at line 2336 of file MtrrLib.c.

◆ MtrrSetVariableMtrrWorker()

VOID MtrrSetVariableMtrrWorker ( IN MTRR_VARIABLE_SETTINGS * VariableSettings )

Worker function setting variable MTRRs

Parameters

[in] VariableSettings A buffer to hold variable MTRRs content.

Definition at line 2798 of file MtrrLib.c.

Variable Documentation

◆ mMtrrLibFixedMtrrTable

CONST FIXED_MTRR mMtrrLibFixedMtrrTable[]

Definition at line 58 of file MtrrLib.c.

◆ mMtrrMemoryCacheTypeShortName

GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8* mMtrrMemoryCacheTypeShortName[]

Initial value:

= {
  "UC",  
  "WC",  
  "R*",  
  "R*",  
  "WT",  
  "WP",  
  "WB",  
  "R*"   
}

Definition at line 119 of file MtrrLib.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ CLEAR_SEED

◆ M

◆ MAX_WEIGHT

◆ MTRR_LIB_ASSERT_ALIGNED

◆ O

◆ OR_SEED

◆ SCRATCH_BUFFER_SIZE

Function Documentation

◆ GetFirmwareVariableMtrrCount()

◆ GetFirmwareVariableMtrrCountWorker()

◆ GetVariableMtrrCount()

◆ GetVariableMtrrCountWorker()

◆ IsMtrrSupported()

◆ MtrrDebugPrintAllMtrrs()

◆ MtrrDebugPrintAllMtrrsWorker()

◆ MtrrGetAllMtrrs()

◆ MtrrGetDefaultMemoryType()

◆ MtrrGetDefaultMemoryTypeWorker()

◆ MtrrGetFixedMtrr()

◆ MtrrGetFixedMtrrWorker()

◆ MtrrGetMemoryAttribute()

◆ MtrrGetMemoryAttributeByAddressWorker()

◆ MtrrGetMemoryAttributeInVariableMtrr()

◆ MtrrGetMemoryAttributeInVariableMtrrWorker()

◆ MtrrGetMemoryAttributesInMtrrSettings()

◆ MtrrGetVariableMtrrWorker()

◆ MtrrLibAppendVariableMtrr()

◆ MtrrLibApplyFixedMtrrs()

◆ MtrrLibApplyVariableMtrrs()

◆ MtrrLibBiggestAlignment()

◆ MtrrLibCalculateLeastMtrrs()

◆ MtrrLibCalculateMtrrs()

◆ MtrrLibCalculateSubtractivePath()

◆ MtrrLibGetCompatibleTypes()

◆ MtrrLibGetNumberOfTypes()

◆ MtrrLibGetRawVariableRanges()

◆ MtrrLibInitializeMtrrMask()

◆ MtrrLibIsMtrrSupported()

◆ MtrrLibLowestType()

◆ MtrrLibMergeVariableMtrr()

◆ MtrrLibPostMtrrChange()

◆ MtrrLibPostMtrrChangeEnableCache()

◆ MtrrLibPrecedence()

◆ MtrrLibPreMtrrChange()

◆ MtrrLibProgramFixedMtrr()

◆ MtrrLibSetBelow1MBMemoryAttribute()

◆ MtrrLibSetMemoryRanges()

◆ MtrrLibSetMemoryType()

◆ MtrrLibTypeLeftPrecedeRight()

◆ MtrrSetAllMtrrs()

◆ MtrrSetFixedMtrrWorker()

◆ MtrrSetMemoryAttribute()

◆ MtrrSetMemoryAttributeInMtrrSettings()

◆ MtrrSetMemoryAttributesInMtrrSettings()

◆ MtrrSetVariableMtrrWorker()

Variable Documentation

◆ mMtrrLibFixedMtrrTable

◆ mMtrrMemoryCacheTypeShortName