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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2005 - 2007, Intel Corporation. All rights reserved.<BR>\r | |
4 | This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | PciDriverOverride.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | PCI Bus Driver\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
24 | #include "PciBus.h"\r | |
25 | \r | |
26 | EFI_STATUS\r | |
27 | EFIAPI\r | |
28 | GetDriver(\r | |
29 | IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,\r | |
30 | IN OUT EFI_HANDLE *DriverImageHandle\r | |
31 | );\r | |
32 | \r | |
33 | \r | |
34 | \r | |
35 | EFI_STATUS\r | |
36 | InitializePciDriverOverrideInstance (\r | |
37 | PCI_IO_DEVICE *PciIoDevice\r | |
38 | )\r | |
39 | /*++\r | |
40 | \r | |
41 | Routine Description:\r | |
42 | \r | |
43 | Initializes a PCI Driver Override Instance\r | |
44 | \r | |
45 | Arguments:\r | |
46 | \r | |
47 | Returns:\r | |
48 | \r | |
49 | None\r | |
50 | \r | |
51 | --*/\r | |
52 | \r | |
53 | {\r | |
54 | PciIoDevice->PciDriverOverride.GetDriver = GetDriver;\r | |
55 | return EFI_SUCCESS;\r | |
56 | }\r | |
57 | \r | |
58 | EFI_STATUS\r | |
59 | EFIAPI\r | |
60 | GetDriver (\r | |
61 | IN EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *This,\r | |
62 | IN OUT EFI_HANDLE *DriverImageHandle\r | |
63 | )\r | |
64 | /*++\r | |
65 | \r | |
66 | Routine Description:\r | |
67 | \r | |
68 | Get a overriding driver image\r | |
69 | \r | |
70 | Arguments:\r | |
71 | \r | |
72 | Returns:\r | |
73 | \r | |
74 | None\r | |
75 | \r | |
76 | --*/\r | |
77 | {\r | |
78 | PCI_IO_DEVICE *PciIoDevice;\r | |
79 | LIST_ENTRY *CurrentLink;\r | |
80 | PCI_DRIVER_OVERRIDE_LIST *Node;\r | |
81 | \r | |
82 | PciIoDevice = PCI_IO_DEVICE_FROM_PCI_DRIVER_OVERRIDE_THIS (This);\r | |
83 | \r | |
84 | CurrentLink = PciIoDevice->OptionRomDriverList.ForwardLink;\r | |
85 | \r | |
86 | while (CurrentLink && CurrentLink != &PciIoDevice->OptionRomDriverList) {\r | |
87 | \r | |
88 | Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink);\r | |
89 | \r | |
90 | if (*DriverImageHandle == NULL) {\r | |
91 | \r | |
92 | *DriverImageHandle = Node->DriverImageHandle;\r | |
93 | return EFI_SUCCESS;\r | |
94 | }\r | |
95 | \r | |
96 | if (*DriverImageHandle == Node->DriverImageHandle) {\r | |
97 | \r | |
98 | if (CurrentLink->ForwardLink == &PciIoDevice->OptionRomDriverList ||\r | |
99 | CurrentLink->ForwardLink == NULL) {\r | |
100 | return EFI_NOT_FOUND;\r | |
101 | }\r | |
102 | \r | |
103 | //\r | |
104 | // Get next node\r | |
105 | //\r | |
106 | Node = DRIVER_OVERRIDE_FROM_LINK (CurrentLink->ForwardLink);\r | |
107 | *DriverImageHandle = Node->DriverImageHandle;\r | |
108 | return EFI_SUCCESS;\r | |
109 | }\r | |
110 | \r | |
111 | CurrentLink = CurrentLink->ForwardLink;\r | |
112 | }\r | |
113 | \r | |
114 | return EFI_INVALID_PARAMETER;\r | |
115 | }\r | |
116 | \r | |
117 | EFI_STATUS\r | |
118 | AddDriver (\r | |
119 | IN PCI_IO_DEVICE *PciIoDevice,\r | |
120 | IN EFI_HANDLE DriverImageHandle\r | |
121 | )\r | |
122 | /*++\r | |
123 | \r | |
124 | Routine Description:\r | |
125 | \r | |
126 | Add a overriding driver image\r | |
127 | \r | |
128 | Arguments:\r | |
129 | \r | |
130 | Returns:\r | |
131 | \r | |
132 | None\r | |
133 | \r | |
134 | --*/\r | |
135 | \r | |
136 | {\r | |
137 | EFI_STATUS Status;\r | |
138 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
139 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
140 | PCI_DRIVER_OVERRIDE_LIST *Node;\r | |
141 | \r | |
142 | Status = gBS->HandleProtocol (DriverImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &LoadedImage);\r | |
143 | if (EFI_ERROR (Status)) {\r | |
144 | return Status;\r | |
145 | }\r | |
146 | \r | |
147 | Node = AllocatePool (sizeof (PCI_DRIVER_OVERRIDE_LIST));\r | |
148 | if (Node == NULL) {\r | |
149 | return EFI_OUT_OF_RESOURCES;\r | |
150 | }\r | |
151 | \r | |
152 | Node->Signature = DRIVER_OVERRIDE_SIGNATURE;\r | |
153 | Node->DriverImageHandle = DriverImageHandle;\r | |
154 | \r | |
155 | InsertTailList (&PciIoDevice->OptionRomDriverList, &(Node->Link));\r | |
156 | \r | |
157 | PciIoDevice->BusOverride = TRUE;\r | |
158 | \r | |
159 | \r | |
160 | ImageContext.Handle = LoadedImage->ImageBase;\r | |
161 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r | |
162 | \r | |
163 | //\r | |
164 | // Get information about the image \r | |
165 | //\r | |
166 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
167 | if (EFI_ERROR (Status)) {\r | |
168 | return EFI_SUCCESS;\r | |
169 | }\r | |
170 | \r | |
171 | if (ImageContext.Machine != EFI_IMAGE_MACHINE_EBC) {\r | |
172 | return EFI_SUCCESS;\r | |
173 | }\r | |
174 | \r | |
175 | return EFI_SUCCESS;\r | |
176 | }\r |