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1 | /**@file\r |
2 | Library utility functions for Runtime driver.\r |
3 | \r |
4 | Copyright (c) 2006 Intel Corporation. <BR>\r |
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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 |
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13 | **/\r |
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14 | \r |
15 | #include <RuntimeLibInternal.h>\r |
16 | \r |
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17 | ///\r |
18 | /// Driver Lib Module Globals\r |
19 | ///\r |
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20 | \r |
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21 | STATIC EFI_EVENT mEfiVirtualNotifyEvent;\r |
22 | STATIC BOOLEAN mEfiGoneVirtual = FALSE;\r |
23 | STATIC BOOLEAN mEfiAtRuntime = FALSE;\r |
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24 | EFI_RUNTIME_SERVICES *mRT;\r |
25 | \r |
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26 | /**\r |
27 | Set AtRuntime flag as TRUE after ExitBootServices\r |
28 | \r |
29 | @param[in] Event The Event that is being processed\r |
30 | @param[in] Context Event Context\r |
31 | **/\r |
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32 | VOID\r |
33 | EFIAPI\r |
34 | RuntimeDriverExitBootServices (\r |
35 | IN EFI_EVENT Event,\r |
36 | IN VOID *Context\r |
37 | )\r |
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38 | {\r |
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39 | //\r |
40 | // Clear out BootService globals\r |
41 | //\r |
42 | gBS = NULL;\r |
43 | \r |
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44 | mEfiAtRuntime = TRUE;\r |
45 | }\r |
46 | \r |
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47 | /**\r |
48 | Fixup internal data so that EFI can be call in virtual mode.\r |
49 | Call the passed in Child Notify event and convert any pointers in \r |
50 | lib to virtual mode.\r |
51 | \r |
52 | @param[in] Event The Event that is being processed\r |
53 | @param[in] Context Event Context\r |
54 | **/\r |
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55 | STATIC\r |
56 | VOID\r |
57 | EFIAPI\r |
58 | RuntimeLibVirtualNotifyEvent (\r |
59 | IN EFI_EVENT Event,\r |
60 | IN VOID *Context\r |
61 | )\r |
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62 | {\r |
63 | UINTN Index;\r |
64 | EFI_EVENT_NOTIFY ChildNotifyEventHandler;\r |
65 | \r |
66 | for (Index = 0; \r |
67 | _gDriverSetVirtualAddressMapEvent[Index] != NULL;\r |
68 | Index++) {\r |
69 | ChildNotifyEventHandler = _gDriverSetVirtualAddressMapEvent[Index];\r |
70 | ChildNotifyEventHandler (Event, NULL);\r |
71 | }\r |
72 | \r |
73 | //\r |
74 | // Update global for Runtime Services Table and IO\r |
75 | //\r |
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76 | EfiConvertPointer (0, (VOID **) &mRT);\r |
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77 | \r |
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78 | mEfiGoneVirtual = TRUE;\r |
79 | }\r |
80 | \r |
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81 | /**\r |
82 | Intialize runtime Driver Lib if it has not yet been initialized. \r |
83 | \r |
84 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
85 | @param[in] SystemTable A pointer to the EFI System Table.\r |
86 | \r |
87 | @return EFI_STATUS always returns EFI_SUCCESS except EFI_ALREADY_STARTED if already started.\r |
88 | **/\r |
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89 | EFI_STATUS\r |
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90 | EFIAPI\r |
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91 | RuntimeDriverLibConstruct (\r |
92 | IN EFI_HANDLE ImageHandle,\r |
93 | IN EFI_SYSTEM_TABLE *SystemTable\r |
94 | )\r |
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95 | {\r |
96 | EFI_STATUS Status;\r |
97 | \r |
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98 | ASSERT (SystemTable != NULL);\r |
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99 | mRT = SystemTable->RuntimeServices;\r |
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100 | ASSERT (mRT != NULL);\r |
101 | \r |
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102 | //\r |
103 | // Register SetVirtualAddressMap () notify function\r |
104 | // \r |
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105 | if (_gDriverSetVirtualAddressMapEvent[0] != NULL) {\r |
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106 | ASSERT (gBS != NULL);\r |
107 | Status = gBS->CreateEvent (\r |
108 | EFI_EVENT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r |
109 | EFI_TPL_NOTIFY,\r |
110 | RuntimeLibVirtualNotifyEvent,\r |
111 | NULL,\r |
112 | &mEfiVirtualNotifyEvent\r |
113 | );\r |
114 | \r |
115 | ASSERT_EFI_ERROR (Status);\r |
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116 | }\r |
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117 | \r |
118 | return EFI_SUCCESS;\r |
119 | }\r |
120 | \r |
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121 | /**\r |
122 | This routine will free some resources which have been allocated in\r |
123 | EfiInitializeRuntimeDriverLib(). If a runtime driver exits with an error, \r |
124 | it must call this routine to free the allocated resource before the exiting.\r |
125 | \r |
126 | @retval EFI_SUCCESS Shutdown the Runtime Driver Lib successfully\r |
127 | @retval EFI_UNSUPPORTED Runtime Driver lib was not initialized at all\r |
128 | **/\r |
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129 | EFI_STATUS\r |
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130 | EFIAPI\r |
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131 | RuntimeDriverLibDeconstruct (\r |
132 | VOID\r |
133 | )\r |
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134 | {\r |
135 | EFI_STATUS Status;\r |
136 | \r |
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137 | //\r |
138 | // Close SetVirtualAddressMap () notify function\r |
139 | //\r |
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140 | if (_gDriverSetVirtualAddressMapEvent[0] != NULL) {\r |
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141 | ASSERT (gBS != NULL);\r |
142 | Status = gBS->CloseEvent (mEfiVirtualNotifyEvent);\r |
143 | ASSERT_EFI_ERROR (Status);\r |
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144 | }\r |
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145 | \r |
146 | return EFI_SUCCESS;\r |
147 | }\r |
148 | \r |
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149 | /**\r |
150 | Return TRUE if ExitBootServices () has been called\r |
151 | \r |
152 | @retval TRUE If ExitBootServices () has been called\r |
153 | **/\r |
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154 | BOOLEAN\r |
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155 | EFIAPI\r |
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156 | EfiAtRuntime (\r |
157 | VOID\r |
158 | )\r |
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159 | {\r |
160 | return mEfiAtRuntime;\r |
161 | }\r |
162 | \r |
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163 | /**\r |
164 | Return TRUE if SetVirtualAddressMap () has been called\r |
165 | \r |
166 | @retval TRUE If SetVirtualAddressMap () has been called\r |
167 | **/\r |
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168 | BOOLEAN\r |
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169 | EFIAPI\r |
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170 | EfiGoneVirtual (\r |
171 | VOID\r |
172 | )\r |
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173 | {\r |
174 | return mEfiGoneVirtual;\r |
175 | }\r |
176 | \r |