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949f388f | 1 | /** @file\r |
2 | Emulator Thunk to abstract OS services from pure EFI code\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2011, Apple Inc. All rights reserved.<BR>\r | |
b8800fc5 | 5 | Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r |
d18d8a1d | 6 | \r |
949f388f | 7 | This program and the accompanying materials\r |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <Uefi.h>\r | |
18 | #include <Library/BaseLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
b8800fc5 | 21 | #include <Library/MemoryAllocationLib.h>\r |
949f388f | 22 | \r |
23 | #include <Protocol/EmuIoThunk.h>\r | |
24 | \r | |
949f388f | 25 | \r |
26 | #define EMU_IO_THUNK_PROTOCOL_DATA_SIGNATURE SIGNATURE_32('E','m','u','T')\r | |
27 | \r | |
28 | typedef struct {\r | |
29 | UINTN Signature;\r | |
30 | EMU_IO_THUNK_PROTOCOL Data;\r | |
31 | BOOLEAN EmuBusDriver;\r | |
32 | LIST_ENTRY Link;\r | |
33 | } EMU_IO_THUNK_PROTOCOL_DATA;\r | |
34 | \r | |
35 | LIST_ENTRY mThunkList = INITIALIZE_LIST_HEAD_VARIABLE (mThunkList);\r | |
36 | \r | |
37 | \r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | AddThunkProtocol (\r | |
d18d8a1d | 41 | IN EMU_IO_THUNK_PROTOCOL *ThunkIo,\r |
949f388f | 42 | IN CHAR16 *ConfigString,\r |
43 | IN BOOLEAN EmuBusDriver\r | |
44 | )\r | |
45 | {\r | |
46 | CHAR16 *StartString;\r | |
47 | CHAR16 *SubString;\r | |
48 | UINTN Instance;\r | |
49 | EMU_IO_THUNK_PROTOCOL_DATA *Private;\r | |
d18d8a1d | 50 | \r |
949f388f | 51 | if (ThunkIo == NULL) {\r |
52 | return EFI_INVALID_PARAMETER;\r | |
53 | }\r | |
d18d8a1d | 54 | \r |
949f388f | 55 | Instance = 0;\r |
b8800fc5 | 56 | StartString = AllocatePool (StrSize (ConfigString));\r |
949f388f | 57 | StrCpy (StartString, ConfigString);\r |
58 | while (*StartString != '\0') {\r | |
59 | \r | |
60 | //\r | |
61 | // Find the end of the sub string\r | |
62 | //\r | |
63 | SubString = StartString;\r | |
64 | while (*SubString != '\0' && *SubString != '!') {\r | |
65 | SubString++;\r | |
66 | }\r | |
67 | \r | |
68 | if (*SubString == '!') {\r | |
69 | //\r | |
70 | // Replace token with '\0' to make sub strings. If this is the end\r | |
71 | // of the string SubString will already point to NULL.\r | |
72 | //\r | |
73 | *SubString = '\0';\r | |
74 | SubString++;\r | |
75 | }\r | |
76 | \r | |
b8800fc5 | 77 | Private = AllocatePool (sizeof (EMU_IO_THUNK_PROTOCOL_DATA));\r |
949f388f | 78 | if (Private == NULL) {\r |
79 | return EFI_OUT_OF_RESOURCES;\r | |
80 | }\r | |
81 | Private->Signature = EMU_IO_THUNK_PROTOCOL_DATA_SIGNATURE;\r | |
82 | Private->EmuBusDriver = EmuBusDriver;\r | |
83 | \r | |
d18d8a1d | 84 | CopyMem (&Private->Data, ThunkIo, sizeof (EMU_IO_THUNK_PROTOCOL));\r |
949f388f | 85 | Private->Data.Instance = Instance++;\r |
86 | Private->Data.ConfigString = StartString;\r | |
d18d8a1d | 87 | \r |
949f388f | 88 | InsertTailList (&mThunkList, &Private->Link);\r |
89 | \r | |
90 | //\r | |
91 | // Parse Next sub string. This will point to '\0' if we are at the end.\r | |
92 | //\r | |
93 | StartString = SubString;\r | |
94 | }\r | |
95 | \r | |
96 | return EFI_SUCCESS;\r | |
97 | }\r | |
98 | \r | |
99 | \r | |
100 | EFI_STATUS\r | |
101 | EFIAPI\r | |
102 | GetNextThunkProtocol (\r | |
103 | IN BOOLEAN EmuBusDriver,\r | |
104 | OUT EMU_IO_THUNK_PROTOCOL **Instance OPTIONAL\r | |
105 | )\r | |
106 | {\r | |
d18d8a1d | 107 | LIST_ENTRY *Link;\r |
108 | EMU_IO_THUNK_PROTOCOL_DATA *Private;\r | |
109 | \r | |
949f388f | 110 | if (mThunkList.ForwardLink == &mThunkList) {\r |
111 | // Skip parsing an empty list\r | |
112 | return EFI_NOT_FOUND;\r | |
113 | }\r | |
d18d8a1d | 114 | \r |
949f388f | 115 | for (Link = mThunkList.ForwardLink; Link != &mThunkList; Link = Link->ForwardLink) {\r |
116 | Private = CR (Link, EMU_IO_THUNK_PROTOCOL_DATA, Link, EMU_IO_THUNK_PROTOCOL_DATA_SIGNATURE);\r | |
117 | if (EmuBusDriver & !Private->EmuBusDriver) {\r | |
118 | continue;\r | |
119 | } else if (*Instance == NULL) {\r | |
120 | // Find 1st match in list\r | |
121 | *Instance = &Private->Data;\r | |
122 | return EFI_SUCCESS;\r | |
123 | } else if (*Instance == &Private->Data) {\r | |
124 | // Matched previous call so look for valid next entry\r | |
125 | Link = Link->ForwardLink;\r | |
126 | if (Link == &mThunkList) {\r | |
127 | return EFI_NOT_FOUND;\r | |
128 | }\r | |
129 | Private = CR (Link, EMU_IO_THUNK_PROTOCOL_DATA, Link, EMU_IO_THUNK_PROTOCOL_DATA_SIGNATURE);\r | |
130 | *Instance = &Private->Data;\r | |
131 | return EFI_SUCCESS;\r | |
132 | }\r | |
133 | }\r | |
d18d8a1d | 134 | \r |
135 | \r | |
949f388f | 136 | return EFI_NOT_FOUND;\r |
137 | }\r | |
138 | \r |