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4259256b | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006 - 2008 Intel Corporation. <BR>\r | |
4 | All rights reserved. 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 | Module Name:\r | |
12 | \r | |
13 | Variable.c\r | |
14 | \r | |
15 | Abstract:\r | |
16 | \r | |
17 | PEIM to provide the Variable functionality\r | |
18 | \r | |
19 | --*/\r | |
20 | \r | |
21 | #include <PiPei.h>\r | |
22 | #include <Ppi/ReadOnlyVariable2.h>\r | |
23 | #include <Ppi/ReadOnlyVariable.h>\r | |
24 | #include <Library/DebugLib.h>\r | |
25 | #include <Library/PeiServicesTablePointerLib.h>\r | |
26 | #include <Library/PeiServicesLib.h>\r | |
27 | \r | |
28 | //\r | |
29 | // Function Prototypes\r | |
30 | //\r | |
31 | EFI_STATUS\r | |
32 | EFIAPI\r | |
33 | PeiGetVariable (\r | |
34 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
35 | IN CONST CHAR16 *VariableName,\r | |
36 | IN CONST EFI_GUID *VariableGuid,\r | |
37 | OUT UINT32 *Attributes,\r | |
38 | IN OUT UINTN *DataSize,\r | |
39 | OUT VOID *Data\r | |
40 | );\r | |
41 | \r | |
42 | EFI_STATUS\r | |
43 | EFIAPI\r | |
44 | PeiGetNextVariableName (\r | |
45 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
46 | IN OUT UINTN *VariableNameSize,\r | |
47 | IN OUT CHAR16 *VariableName,\r | |
48 | IN OUT EFI_GUID *VariableGuid\r | |
49 | );\r | |
50 | \r | |
51 | //\r | |
52 | // Module globals\r | |
53 | //\r | |
54 | EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariablePpi = {\r | |
55 | PeiGetVariable,\r | |
56 | PeiGetNextVariableName\r | |
57 | };\r | |
58 | \r | |
59 | EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {\r | |
60 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
61 | &gEfiPeiReadOnlyVariable2PpiGuid,\r | |
62 | &mVariablePpi\r | |
63 | };\r | |
64 | \r | |
65 | EFI_STATUS\r | |
66 | EFIAPI\r | |
67 | PeimInitializeReadOnlyVariable2 (\r | |
68 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
69 | IN EFI_PEI_SERVICES **PeiServices\r | |
70 | )\r | |
71 | /*++\r | |
72 | \r | |
73 | Routine Description:\r | |
74 | \r | |
75 | Provide the functionality of the variable services.\r | |
76 | \r | |
77 | Arguments:\r | |
78 | \r | |
79 | FfsHeadher - The FFS file header\r | |
80 | PeiServices - General purpose services available to every PEIM.\r | |
81 | \r | |
82 | Returns:\r | |
83 | \r | |
84 | Status - EFI_SUCCESS if the interface could be successfully\r | |
85 | installed\r | |
86 | \r | |
87 | --*/\r | |
88 | {\r | |
89 | //\r | |
90 | // Publish the variable capability to other modules\r | |
91 | //\r | |
92 | return PeiServicesInstallPpi (&mPpiListVariable);\r | |
93 | }\r | |
94 | \r | |
95 | EFI_STATUS\r | |
96 | EFIAPI\r | |
97 | PeiGetVariable (\r | |
98 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
99 | IN CONST CHAR16 *VariableName,\r | |
100 | IN CONST EFI_GUID *VariableGuid,\r | |
101 | OUT UINT32 *Attributes,\r | |
102 | IN OUT UINTN *DataSize,\r | |
103 | OUT VOID *Data\r | |
104 | )\r | |
105 | /*++\r | |
106 | \r | |
107 | Routine Description:\r | |
108 | \r | |
109 | Provide the read variable functionality of the variable services.\r | |
110 | \r | |
111 | Arguments:\r | |
112 | \r | |
113 | PeiServices - General purpose services available to every PEIM.\r | |
114 | \r | |
115 | VariableName - The variable name\r | |
116 | \r | |
117 | VendorGuid - The vendor's GUID\r | |
118 | \r | |
119 | Attributes - Pointer to the attribute\r | |
120 | \r | |
121 | DataSize - Size of data\r | |
122 | \r | |
123 | Data - Pointer to data\r | |
124 | \r | |
125 | Returns:\r | |
126 | \r | |
127 | EFI_SUCCESS - The interface could be successfully installed\r | |
128 | \r | |
129 | EFI_NOT_FOUND - The variable could not be discovered\r | |
130 | \r | |
131 | EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r | |
132 | \r | |
133 | --*/\r | |
134 | {\r | |
135 | EFI_STATUS Status;\r | |
136 | EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;\r | |
137 | \r | |
138 | Status = PeiServicesLocatePpi (\r | |
139 | &gEfiPeiReadOnlyVariablePpiGuid,\r | |
140 | 0,\r | |
141 | NULL,\r | |
142 | (VOID **)&ReadOnlyVariable\r | |
143 | );\r | |
144 | ASSERT_EFI_ERROR (Status);\r | |
145 | \r | |
146 | return ReadOnlyVariable->PeiGetVariable (\r | |
147 | GetPeiServicesTablePointer (),\r | |
148 | (CHAR16 *)VariableName,\r | |
149 | (EFI_GUID *)VariableGuid,\r | |
150 | Attributes,\r | |
151 | DataSize,\r | |
152 | Data\r | |
153 | );\r | |
154 | }\r | |
155 | \r | |
156 | EFI_STATUS\r | |
157 | EFIAPI\r | |
158 | PeiGetNextVariableName (\r | |
159 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
160 | IN OUT UINTN *VariableNameSize,\r | |
161 | IN OUT CHAR16 *VariableName,\r | |
162 | IN OUT EFI_GUID *VariableGuid\r | |
163 | )\r | |
164 | /*++\r | |
165 | \r | |
166 | Routine Description:\r | |
167 | \r | |
168 | Provide the get next variable functionality of the variable services.\r | |
169 | \r | |
170 | Arguments:\r | |
171 | \r | |
172 | PeiServices - General purpose services available to every PEIM.\r | |
173 | VariabvleNameSize - The variable name's size.\r | |
174 | VariableName - A pointer to the variable's name.\r | |
175 | VariableGuid - A pointer to the EFI_GUID structure.\r | |
176 | \r | |
177 | VariableNameSize - Size of the variable name\r | |
178 | \r | |
179 | VariableName - The variable name\r | |
180 | \r | |
181 | VendorGuid - The vendor's GUID\r | |
182 | \r | |
183 | Returns:\r | |
184 | \r | |
185 | EFI_SUCCESS - The interface could be successfully installed\r | |
186 | \r | |
187 | EFI_NOT_FOUND - The variable could not be discovered\r | |
188 | \r | |
189 | --*/\r | |
190 | {\r | |
191 | EFI_STATUS Status;\r | |
192 | EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;\r | |
193 | \r | |
194 | Status = PeiServicesLocatePpi (\r | |
195 | &gEfiPeiReadOnlyVariablePpiGuid,\r | |
196 | 0,\r | |
197 | NULL,\r | |
198 | (VOID **)&ReadOnlyVariable\r | |
199 | );\r | |
200 | ASSERT_EFI_ERROR (Status);\r | |
201 | \r | |
202 | return ReadOnlyVariable->PeiGetNextVariableName (\r | |
203 | GetPeiServicesTablePointer (),\r | |
204 | VariableNameSize,\r | |
205 | VariableName,\r | |
206 | VariableGuid\r | |
207 | );\r | |
208 | }\r |