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1 | /*++ @file\r | |
2 | \r | |
3 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
4 | Portions copyright (c) 2011, Apple Inc. All rights reserved.\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 | #include <PiDxe.h>\r | |
16 | \r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/HobLib.h>\r | |
19 | #include <Library/EmuThunkLib.h>\r | |
20 | #include <Library/BaseMemoryLib.h>\r | |
21 | \r | |
22 | EMU_THUNK_PROTOCOL *gEmuThunk = NULL;\r | |
23 | \r | |
24 | \r | |
25 | /**\r | |
26 | The constructor function caches the pointer of EMU Thunk protocol.\r | |
27 | \r | |
28 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
29 | @param SystemTable A pointer to the EFI System Table.\r | |
30 | \r | |
31 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
32 | \r | |
33 | **/\r | |
34 | EFI_STATUS\r | |
35 | EFIAPI\r | |
36 | DxeEmuLibConstructor (\r | |
37 | IN EFI_HANDLE ImageHandle,\r | |
38 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
39 | )\r | |
40 | {\r | |
41 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
42 | \r | |
43 | GuidHob = GetFirstGuidHob (&gEmuThunkProtocolGuid);\r | |
44 | ASSERT (GuidHob != NULL);\r | |
45 | \r | |
46 | gEmuThunk = (EMU_THUNK_PROTOCOL *)(*(UINTN *)(GET_GUID_HOB_DATA (GuidHob)));\r | |
47 | ASSERT (gEmuThunk != NULL);\r | |
48 | \r | |
49 | return EFI_SUCCESS;\r | |
50 | }\r | |
51 | \r | |
52 | \r | |
53 | /**\r | |
54 | Serach the EMU IO Thunk database for a matching EMU IO Thunk\r | |
55 | Protocol instance.\r | |
56 | \r | |
57 | @param Protocol Protocol to search for.\r | |
58 | @param Instance Instance of protocol to search for.\r | |
59 | \r | |
60 | @retval NULL Protocol and Instance not found.\r | |
61 | @retval other EMU IO Thunk protocol that matched.\r | |
62 | \r | |
63 | **/\r | |
64 | EMU_IO_THUNK_PROTOCOL *\r | |
65 | EFIAPI\r | |
66 | GetIoThunkInstance (\r | |
67 | IN EFI_GUID *Protocol,\r | |
68 | IN UINTN Instance\r | |
69 | )\r | |
70 | {\r | |
71 | EFI_STATUS Status;\r | |
72 | EMU_IO_THUNK_PROTOCOL *EmuIoThunk;\r | |
73 | \r | |
74 | for (Status = EFI_SUCCESS, EmuIoThunk = NULL; !EFI_ERROR (Status); ) {\r | |
75 | Status = gEmuThunk->GetNextProtocol (FALSE, &EmuIoThunk);\r | |
76 | if (EFI_ERROR (Status)) {\r | |
77 | break;\r | |
78 | }\r | |
79 | \r | |
80 | if (EmuIoThunk->Instance == Instance) {\r | |
81 | if (CompareGuid (EmuIoThunk->Protocol, Protocol)) {\r | |
82 | return EmuIoThunk;\r | |
83 | }\r | |
84 | }\r | |
85 | }\r | |
86 | \r | |
87 | return NULL;\r | |
88 | } |