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1/** @file\r
2\r
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3 The protocol provides support to allocate, free, map and umap a DMA buffer\r
4 for bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations\r
5 must be performed on unencrypted buffer hence protocol clear the encryption\r
6 bit from the DMA buffer.\r
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7\r
8 Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r
9 Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
8dccfa6d 10 (C) Copyright 2017 Hewlett Packard Enterprise Development LP<BR>\r
b26f0cf9 11 SPDX-License-Identifier: BSD-2-Clause-Patent\r
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12\r
13**/\r
14\r
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15#ifndef _AMD_SEV_IOMMU_H_\r
16#define _AMD_SEV_IOMMU_H_\r
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17\r
18#include <Protocol/IoMmu.h>\r
19\r
20#include <Library/BaseLib.h>\r
f9d129e6 21#include <Library/BaseMemoryLib.h>\r
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22#include <Library/DebugLib.h>\r
23#include <Library/MemEncryptSevLib.h>\r
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24#include <Library/MemoryAllocationLib.h>\r
25#include <Library/UefiBootServicesTableLib.h>\r
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26\r
27/**\r
28 Install IOMMU protocol to provide the DMA support for PciHostBridge and\r
29 MemEncryptSevLib.\r
30\r
31**/\r
db125079 32EFI_STATUS\r
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33EFIAPI\r
34AmdSevInstallIoMmuProtocol (\r
35 VOID\r
36 );\r
37\r
38#endif\r