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e386b444 | 1 | /** @file\r |
2 | Entry point to a EFI/DXE driver.\r | |
3 | \r | |
7eb2c64d | 4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r |
19388d29 | 5 | This program and the accompanying materials\r |
e386b444 | 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 | |
c892d846 | 16 | \r |
c7d265a9 | 17 | #include <Uefi.h>\r |
c892d846 | 18 | \r |
c7d265a9 | 19 | #include <Protocol/LoadedImage.h>\r |
c892d846 | 20 | \r |
c7d265a9 | 21 | #include <Library/UefiDriverEntryPoint.h>\r |
6517edbe | 22 | #include <Library/BaseLib.h>\r |
c7d265a9 | 23 | #include <Library/DebugLib.h>\r |
24 | #include <Library/UefiBootServicesTableLib.h>\r | |
e386b444 | 25 | \r |
26 | \r | |
27 | /**\r | |
7eb2c64d | 28 | Unloads an image from memory.\r |
e386b444 | 29 | \r |
7eb2c64d LG |
30 | This function is a callback that a driver registers to do cleanup \r |
31 | when the UnloadImage boot service function is called.\r | |
32 | \r | |
33 | @param ImageHandle The handle to the image to unload.\r | |
e386b444 | 34 | \r |
373b5cf9 | 35 | @return Status returned by all unload().\r |
e386b444 | 36 | \r |
37 | **/\r | |
e386b444 | 38 | EFI_STATUS\r |
39 | EFIAPI\r | |
40 | _DriverUnloadHandler (\r | |
41 | EFI_HANDLE ImageHandle\r | |
42 | )\r | |
43 | {\r | |
44 | EFI_STATUS Status;\r | |
45 | \r | |
46 | //\r | |
47 | // If an UnloadImage() handler is specified, then call it\r | |
48 | //\r | |
49 | Status = ProcessModuleUnloadList (ImageHandle);\r | |
50 | \r | |
51 | //\r | |
52 | // If the driver specific unload handler does not return an error, then call all of the\r | |
53 | // library destructors. If the unload handler returned an error, then the driver can not be\r | |
54 | // unloaded, and the library destructors should not be called\r | |
55 | //\r | |
56 | if (!EFI_ERROR (Status)) {\r | |
e386b444 | 57 | ProcessLibraryDestructorList (ImageHandle, gST);\r |
58 | }\r | |
59 | \r | |
60 | //\r | |
61 | // Return the status from the driver specific unload handler\r | |
62 | //\r | |
63 | return Status;\r | |
64 | }\r | |
65 | \r | |
66 | \r | |
e386b444 | 67 | /**\r |
58380e9c | 68 | The entry point of PE/COFF Image for a DXE Driver, DXE Runtime Driver, DXE SMM \r |
69 | Driver, or UEFI Driver. \r | |
66770ccb | 70 | \r |
71 | This function is the entry point for a DXE Driver, DXE Runtime Driver, DXE SMM Driver,\r | |
72 | or UEFI Driver. This function must call ProcessLibraryConstructorList() and\r | |
73 | ProcessModuleEntryPointList(). If the return status from ProcessModuleEntryPointList()\r | |
58380e9c | 74 | is an error status, then ProcessLibraryDestructorList() must be called. The return \r |
75 | value from ProcessModuleEntryPointList() is returned. If _gDriverUnloadImageCount \r | |
76 | is greater than zero, then an unload handler must be registered for this image \r | |
77 | and the unload handler must invoke ProcessModuleUnloadList().\r | |
78 | If _gUefiDriverRevision is not zero and SystemTable->Hdr.Revision is less than \r | |
79 | _gUefiDriverRevison, then return EFI_INCOMPATIBLE_VERSION.\r | |
e386b444 | 80 | \r |
e386b444 | 81 | \r |
58380e9c | 82 | @param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver, \r |
83 | DXE SMM Driver, or UEFI Driver.\r | |
f6d2bcc6 | 84 | @param SystemTable A pointer to the EFI System Table.\r |
66770ccb | 85 | \r |
58380e9c | 86 | @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM \r |
87 | Driver, or UEFI Driver exited normally.\r | |
88 | @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than \r | |
89 | SystemTable->Hdr.Revision.\r | |
66770ccb | 90 | @retval Other Return value from ProcessModuleEntryPointList().\r |
e386b444 | 91 | \r |
92 | **/\r | |
93 | EFI_STATUS\r | |
94 | EFIAPI\r | |
95 | _ModuleEntryPoint (\r | |
96 | IN EFI_HANDLE ImageHandle,\r | |
97 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
98 | )\r | |
99 | {\r | |
100 | EFI_STATUS Status;\r | |
101 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
102 | \r | |
103 | if (_gUefiDriverRevision != 0) {\r | |
104 | //\r | |
105 | // Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver\r | |
106 | //\r | |
107 | if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {\r | |
108 | return EFI_INCOMPATIBLE_VERSION;\r | |
109 | }\r | |
110 | }\r | |
111 | \r | |
c7d265a9 | 112 | //\r |
113 | // Call constructor for all libraries\r | |
114 | //\r | |
115 | ProcessLibraryConstructorList (ImageHandle, SystemTable);\r | |
116 | \r | |
e386b444 | 117 | //\r |
118 | // Install unload handler...\r | |
119 | //\r | |
120 | if (_gDriverUnloadImageCount != 0) {\r | |
121 | Status = gBS->HandleProtocol (\r | |
122 | ImageHandle,\r | |
123 | &gEfiLoadedImageProtocolGuid,\r | |
124 | (VOID **)&LoadedImage\r | |
125 | );\r | |
126 | ASSERT_EFI_ERROR (Status);\r | |
127 | LoadedImage->Unload = _DriverUnloadHandler;\r | |
128 | }\r | |
129 | \r | |
e386b444 | 130 | //\r |
131 | // Call the driver entry point\r | |
132 | //\r | |
133 | Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);\r | |
134 | \r | |
135 | //\r | |
136 | // If all of the drivers returned errors, then invoke all of the library destructors\r | |
137 | //\r | |
138 | if (EFI_ERROR (Status)) {\r | |
139 | ProcessLibraryDestructorList (ImageHandle, SystemTable);\r | |
140 | }\r | |
141 | \r | |
142 | //\r | |
143 | // Return the cummalative return status code from all of the driver entry points\r | |
144 | //\r | |
145 | return Status;\r | |
146 | }\r | |
147 | \r | |
148 | \r | |
149 | /**\r | |
66770ccb | 150 | Required by the EBC compiler and identical in functionality to _ModuleEntryPoint(). \r |
151 | \r | |
58380e9c | 152 | This function is required to call _ModuleEntryPoint() passing in ImageHandle,\r |
153 | and SystemTable.\r | |
e386b444 | 154 | \r |
58380e9c | 155 | @param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver, DXE \r |
156 | SMM Driver, or UEFI Driver.\r | |
f6d2bcc6 | 157 | @param SystemTable A pointer to the EFI System Table.\r |
e386b444 | 158 | \r |
58380e9c | 159 | @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM \r |
160 | Driver, or UEFI Driver exited normally.\r | |
161 | @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than \r | |
162 | SystemTable->Hdr.Revision.\r | |
66770ccb | 163 | @retval Other Return value from ProcessModuleEntryPointList().\r |
e386b444 | 164 | **/\r |
165 | EFI_STATUS\r | |
166 | EFIAPI\r | |
167 | EfiMain (\r | |
168 | IN EFI_HANDLE ImageHandle,\r | |
169 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
170 | )\r | |
171 | {\r | |
172 | return _ModuleEntryPoint (ImageHandle, SystemTable);\r | |
173 | }\r |