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/** @file
The definition for DMA access Library.
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __DMA_ACCESS_LIB_H__
#define __DMA_ACCESS_LIB_H__
/**
Set DMA protected region.
@param LowMemoryBase The protected low memory region base.
@param LowMemoryLength The protected low memory region length.
@param HighMemoryBase The protected high memory region base.
@param HighMemoryLength The protected high memory region length.
@retval EFI_SUCCESS The DMA protection is set.
@retval EFI_UNSUPPORTED The DMA protection is not set.
**/
EFI_STATUS
SetDmaProtectedRange (
IN UINT32 LowMemoryBase,
IN UINT32 LowMemoryLength,
IN UINT64 HighMemoryBase,
IN UINT64 HighMemoryLength
);
/**
Diable DMA protection.
@retval DMA protection is disabled.
**/
EFI_STATUS
DisableDmaProtection (
VOID
);
/**
Get protected low memory alignment.
@return protected low memory alignment.
**/
UINT32
GetLowMemoryAlignment (
VOID
);
/**
Get protected high memory alignment.
@return protected high memory alignment.
**/
UINT64
GetHighMemoryAlignment (
VOID
);
#endif
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