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1 | /** @file\r |
2 | The definition for DMA access Library.\r | |
3 | \r | |
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php.\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #ifndef __DMA_ACCESS_LIB_H__\r | |
16 | #define __DMA_ACCESS_LIB_H__\r | |
17 | \r | |
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18 | typedef struct {\r |
19 | UINT8 HostAddressWidth;\r | |
20 | UINTN VTdEngineCount;\r | |
21 | UINT64 VTdEngineAddress[1];\r | |
22 | } VTD_INFO;\r | |
23 | \r | |
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24 | /**\r |
25 | Set DMA protected region.\r | |
26 | \r | |
8e9da4ba | 27 | @param EngineMask The mask of the VTd engine to be accessed.\r |
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28 | @param LowMemoryBase The protected low memory region base.\r |
29 | @param LowMemoryLength The protected low memory region length.\r | |
30 | @param HighMemoryBase The protected high memory region base.\r | |
31 | @param HighMemoryLength The protected high memory region length.\r | |
32 | \r | |
33 | @retval EFI_SUCCESS The DMA protection is set.\r | |
34 | @retval EFI_UNSUPPORTED The DMA protection is not set.\r | |
35 | **/\r | |
36 | EFI_STATUS\r | |
37 | SetDmaProtectedRange (\r | |
8e9da4ba | 38 | IN UINT64 EngineMask,\r |
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39 | IN UINT32 LowMemoryBase,\r |
40 | IN UINT32 LowMemoryLength,\r | |
41 | IN UINT64 HighMemoryBase,\r | |
42 | IN UINT64 HighMemoryLength\r | |
43 | );\r | |
44 | \r | |
45 | /**\r | |
46 | Diable DMA protection.\r | |
47 | \r | |
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48 | @param EngineMask The mask of the VTd engine to be accessed.\r |
49 | \r | |
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50 | @retval DMA protection is disabled.\r |
51 | **/\r | |
52 | EFI_STATUS\r | |
53 | DisableDmaProtection (\r | |
8e9da4ba | 54 | IN UINT64 EngineMask\r |
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55 | );\r |
56 | \r | |
57 | /**\r | |
58 | Get protected low memory alignment.\r | |
59 | \r | |
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60 | @param EngineMask The mask of the VTd engine to be accessed.\r |
61 | \r | |
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62 | @return protected low memory alignment.\r |
63 | **/\r | |
64 | UINT32\r | |
65 | GetLowMemoryAlignment (\r | |
8e9da4ba | 66 | IN UINT64 EngineMask\r |
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67 | );\r |
68 | \r | |
69 | /**\r | |
70 | Get protected high memory alignment.\r | |
71 | \r | |
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72 | @param EngineMask The mask of the VTd engine to be accessed.\r |
73 | \r | |
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74 | @return protected high memory alignment.\r |
75 | **/\r | |
76 | UINT64\r | |
77 | GetHighMemoryAlignment (\r | |
8e9da4ba | 78 | IN UINT64 EngineMask\r |
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79 | );\r |
80 | \r | |
81 | #endif\r | |
82 | \r |