CacheLib.h File Reference

Macros
#define	EFI_CACHE_UNCACHEABLE   0
#define	EFI_CACHE_WRITECOMBINING   1
#define	EFI_CACHE_WRITETHROUGH   4
#define	EFI_CACHE_WRITEPROTECTED   5
#define	EFI_CACHE_WRITEBACK   6

Typedefs
typedef INT32	EFI_MEMORY_CACHE_TYPE

Functions
EFI_STATUS EFIAPI	ResetCacheAttributes (VOID)
EFI_STATUS EFIAPI	SetCacheAttributes (IN EFI_PHYSICAL_ADDRESS MemoryAddress, IN UINT64 MemoryLength, IN EFI_MEMORY_CACHE_TYPE MemoryCacheType)

Detailed Description

Copyright (c) 2014, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Macro Definition Documentation

#define EFI_CACHE_UNCACHEABLE   0

#define EFI_CACHE_WRITEBACK   6

#define EFI_CACHE_WRITECOMBINING   1

#define EFI_CACHE_WRITEPROTECTED   5

#define EFI_CACHE_WRITETHROUGH   4

Typedef Documentation

typedef INT32 EFI_MEMORY_CACHE_TYPE

Function Documentation

EFI_STATUS EFIAPI ResetCacheAttributes

(

VOID

)

Reset all the MTRRs to a known state.

Return values

EFI_SUCCESS

All MTRRs have been reset successfully.

EFI_STATUS EFIAPI SetCacheAttributes	(	IN EFI_PHYSICAL_ADDRESS	MemoryAddress,
		IN UINT64	MemoryLength,
		IN EFI_MEMORY_CACHE_TYPE	MemoryCacheType
	)

Given the memory range and cache type, programs the MTRRs.

Parameters

[in]	MemoryAddress	Base Address of Memory to program MTRR.
[in]	MemoryLength	Length of Memory to program MTRR.
[in]	MemoryCacheType	Cache Type.

Return values

EFI_SUCCESS	Mtrr are set successfully.
EFI_LOAD_ERROR	No empty MTRRs to use.
EFI_INVALID_PARAMETER	The input parameter is not valid.
others	An error occurs when setting MTTR.