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