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1 | /** @file\r | |
2 | Entry point to a EFI/DXE driver.\r | |
3 | \r | |
4 | Copyright (c) 2006, Intel Corporation<BR>\r | |
5 | All rights reserved. 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 | /**\r | |
16 | Unload function that is registered in the LoadImage protocol. It un-installs\r | |
17 | protocols produced and deallocates pool used by the driver. Called by the core\r | |
18 | when unloading the driver.\r | |
19 | \r | |
20 | @param ImageHandle\r | |
21 | \r | |
22 | @retval EFI_SUCCESS\r | |
23 | \r | |
24 | **/\r | |
25 | \r | |
26 | EFI_EVENT _mDriverExitBootServicesNotifyEvent;\r | |
27 | \r | |
28 | EFI_STATUS\r | |
29 | EFIAPI\r | |
30 | _DriverUnloadHandler (\r | |
31 | EFI_HANDLE ImageHandle\r | |
32 | )\r | |
33 | {\r | |
34 | EFI_STATUS Status;\r | |
35 | \r | |
36 | //\r | |
37 | // If an UnloadImage() handler is specified, then call it\r | |
38 | //\r | |
39 | Status = ProcessModuleUnloadList (ImageHandle);\r | |
40 | \r | |
41 | //\r | |
42 | // If the driver specific unload handler does not return an error, then call all of the\r | |
43 | // library destructors. If the unload handler returned an error, then the driver can not be\r | |
44 | // unloaded, and the library destructors should not be called\r | |
45 | //\r | |
46 | if (!EFI_ERROR (Status)) {\r | |
47 | //\r | |
48 | // Close our ExitBootServices () notify function\r | |
49 | //\r | |
50 | if (_gDriverExitBootServicesEvent[0] != NULL) {\r | |
51 | Status = gBS->CloseEvent (_mDriverExitBootServicesNotifyEvent);\r | |
52 | ASSERT_EFI_ERROR (Status);\r | |
53 | }\r | |
54 | \r | |
55 | ProcessLibraryDestructorList (ImageHandle, gST);\r | |
56 | }\r | |
57 | \r | |
58 | //\r | |
59 | // Return the status from the driver specific unload handler\r | |
60 | //\r | |
61 | return Status;\r | |
62 | }\r | |
63 | \r | |
64 | VOID\r | |
65 | EFIAPI\r | |
66 | _DriverExitBootServices (\r | |
67 | IN EFI_EVENT Event,\r | |
68 | IN VOID *Context\r | |
69 | )\r | |
70 | /*++\r | |
71 | \r | |
72 | Routine Description:\r | |
73 | \r | |
74 | Set AtRuntime flag as TRUE after ExitBootServices\r | |
75 | \r | |
76 | Arguments:\r | |
77 | \r | |
78 | Event - The Event that is being processed\r | |
79 | \r | |
80 | Context - Event Context\r | |
81 | \r | |
82 | Returns: \r | |
83 | \r | |
84 | None\r | |
85 | \r | |
86 | --*/\r | |
87 | {\r | |
88 | EFI_EVENT_NOTIFY ChildNotifyEventHandler;\r | |
89 | UINTN Index;\r | |
90 | \r | |
91 | for (Index = 0; _gDriverExitBootServicesEvent[Index] != NULL; Index++) {\r | |
92 | ChildNotifyEventHandler = _gDriverExitBootServicesEvent[Index];\r | |
93 | ChildNotifyEventHandler (Event, NULL);\r | |
94 | }\r | |
95 | }\r | |
96 | \r | |
97 | /**\r | |
98 | Enrty point to DXE Driver.\r | |
99 | \r | |
100 | @param ImageHandle ImageHandle of the loaded driver.\r | |
101 | @param SystemTable Pointer to the EFI System Table.\r | |
102 | \r | |
103 | @retval EFI_SUCCESS One or more of the drivers returned a success code.\r | |
104 | @retval !EFI_SUCESS The return status from the last driver entry point in the list.\r | |
105 | \r | |
106 | **/\r | |
107 | EFI_STATUS\r | |
108 | EFIAPI\r | |
109 | _ModuleEntryPoint (\r | |
110 | IN EFI_HANDLE ImageHandle,\r | |
111 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
112 | )\r | |
113 | {\r | |
114 | EFI_STATUS Status;\r | |
115 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
116 | \r | |
117 | if (_gUefiDriverRevision != 0) {\r | |
118 | //\r | |
119 | // Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver\r | |
120 | //\r | |
121 | if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {\r | |
122 | return EFI_INCOMPATIBLE_VERSION;\r | |
123 | }\r | |
124 | }\r | |
125 | \r | |
126 | //\r | |
127 | // Call constructor for all libraries\r | |
128 | //\r | |
129 | ProcessLibraryConstructorList (ImageHandle, SystemTable);\r | |
130 | \r | |
131 | //\r | |
132 | // Register our ExitBootServices () notify function\r | |
133 | //\r | |
134 | if (_gDriverExitBootServicesEvent[0] != NULL) {\r | |
135 | Status = gBS->CreateEvent (\r | |
136 | EFI_EVENT_SIGNAL_EXIT_BOOT_SERVICES,\r | |
137 | EFI_TPL_NOTIFY,\r | |
138 | _DriverExitBootServices,\r | |
139 | NULL,\r | |
140 | &_mDriverExitBootServicesNotifyEvent\r | |
141 | );\r | |
142 | \r | |
143 | ASSERT_EFI_ERROR (Status);\r | |
144 | }\r | |
145 | \r | |
146 | //\r | |
147 | // Install unload handler...\r | |
148 | //\r | |
149 | if (_gDriverUnloadImageCount != 0) {\r | |
150 | Status = gBS->HandleProtocol (\r | |
151 | ImageHandle,\r | |
152 | &gEfiLoadedImageProtocolGuid,\r | |
153 | (VOID **)&LoadedImage\r | |
154 | );\r | |
155 | ASSERT_EFI_ERROR (Status);\r | |
156 | LoadedImage->Unload = _DriverUnloadHandler;\r | |
157 | }\r | |
158 | \r | |
159 | //\r | |
160 | // Call the driver entry point\r | |
161 | //\r | |
162 | Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);\r | |
163 | \r | |
164 | //\r | |
165 | // If all of the drivers returned errors, then invoke all of the library destructors\r | |
166 | //\r | |
167 | if (EFI_ERROR (Status)) {\r | |
168 | //\r | |
169 | // Close our ExitBootServices () notify function\r | |
170 | //\r | |
171 | if (_gDriverExitBootServicesEvent[0] != NULL) {\r | |
172 | Status = gBS->CloseEvent (_mDriverExitBootServicesNotifyEvent);\r | |
173 | ASSERT_EFI_ERROR (Status);\r | |
174 | }\r | |
175 | \r | |
176 | ProcessLibraryDestructorList (ImageHandle, SystemTable);\r | |
177 | }\r | |
178 | \r | |
179 | //\r | |
180 | // Return the cummalative return status code from all of the driver entry points\r | |
181 | //\r | |
182 | return Status;\r | |
183 | }\r | |
184 | \r | |
185 | \r | |
186 | /**\r | |
187 | Enrty point wrapper of DXE Driver.\r | |
188 | \r | |
189 | @param ImageHandle ImageHandle of the loaded driver.\r | |
190 | @param SystemTable Pointer to the EFI System Table.\r | |
191 | \r | |
192 | @retval EFI_SUCCESS One or more of the drivers returned a success code.\r | |
193 | @retval !EFI_SUCESS The return status from the last driver entry point in the list.\r | |
194 | \r | |
195 | **/\r | |
196 | EFI_STATUS\r | |
197 | EFIAPI\r | |
198 | EfiMain (\r | |
199 | IN EFI_HANDLE ImageHandle,\r | |
200 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
201 | )\r | |
202 | {\r | |
203 | return _ModuleEntryPoint (ImageHandle, SystemTable);\r | |
204 | }\r |