source: vbox/trunk/src/VBox/Devices/EFI/FirmwareNew/IntelFsp2Pkg/Include/Library/CacheLib.h

/** @file

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

**/

#ifndef _CACHE_LIB_H_
#define _CACHE_LIB_H_

//
// EFI_MEMORY_CACHE_TYPE
//
typedef INT32 EFI_MEMORY_CACHE_TYPE;

#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

/**
 Reset all the MTRRs to a known state.

  @retval  EFI_SUCCESS All MTRRs have been reset successfully.

**/
EFI_STATUS
EFIAPI
ResetCacheAttributes (
  VOID
  );

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

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

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

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

#endif