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3dbba770 | 1 | /** @file\r |
bcd70414 | 2 | Framework PEIM to provide the Variable functionality\r |
3 | \r | |
de631489 | 4 | Copyright (c) 2006 - 2008 Intel Corporation. <BR>\r |
7ba905c9 | 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 | Module Name:\r | |
13 | \r | |
3dbba770 | 14 | **/\r |
7ba905c9 | 15 | \r |
16 | \r | |
17 | #include "Variable.h"\r | |
18 | \r | |
19 | //\r | |
20 | // Module globals\r | |
21 | //\r | |
22 | static EFI_PEI_READ_ONLY_VARIABLE_PPI mVariablePpi = {\r | |
23 | PeiGetVariable,\r | |
24 | PeiGetNextVariableName\r | |
25 | };\r | |
26 | \r | |
27 | static EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariable2Ppi = {\r | |
28 | PeiGetVariable2,\r | |
29 | PeiGetNextVariableName2\r | |
30 | };\r | |
31 | \r | |
32 | static EFI_PEI_PPI_DESCRIPTOR mPpiListVariable[] = {\r | |
33 | {\r | |
34 | (EFI_PEI_PPI_DESCRIPTOR_PPI),\r | |
35 | &gEfiPeiReadOnlyVariable2PpiGuid,\r | |
36 | &mVariable2Ppi\r | |
37 | },\r | |
38 | {\r | |
39 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
40 | &gEfiPeiReadOnlyVariablePpiGuid,\r | |
41 | &mVariablePpi\r | |
42 | }\r | |
43 | };\r | |
44 | \r | |
45 | EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID;\r | |
46 | \r | |
bcd70414 | 47 | /**\r |
48 | Provide the functionality of the variable services.\r | |
49 | \r | |
50 | @param FfsHeadher - The FFS file header\r | |
51 | @param PeiServices - General purpose services available to every PEIM.\r | |
52 | \r | |
53 | @return Status - EFI_SUCCESS if the interface could be successfully\r | |
54 | installed\r | |
55 | \r | |
56 | **/\r | |
7ba905c9 | 57 | EFI_STATUS\r |
58 | EFIAPI\r | |
59 | PeimInitializeVariableServices (\r | |
60 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
61 | IN EFI_PEI_SERVICES **PeiServices\r | |
62 | )\r | |
7ba905c9 | 63 | {\r |
64 | //\r | |
65 | // Publish the variable capability to other modules\r | |
66 | //\r | |
507b36ca | 67 | return (**PeiServices).InstallPpi ((CONST EFI_PEI_SERVICES **) PeiServices, &mPpiListVariable[0]);\r |
7ba905c9 | 68 | \r |
69 | }\r | |
70 | \r | |
bcd70414 | 71 | /**\r |
130e2569 | 72 | This code gets the pointer to the first variable memory pointer byte\r |
7ba905c9 | 73 | \r |
bcd70414 | 74 | @param VarStoreHeader Pointer to the Variable Store Header.\r |
130e2569 | 75 | \r |
fdb05fa3 | 76 | @return VARIABLE_HEADER* Pointer to last unavailable Variable Header\r |
130e2569 | 77 | \r |
bcd70414 | 78 | **/\r |
79 | VARIABLE_HEADER *\r | |
80 | GetStartPointer (\r | |
81 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
82 | )\r | |
130e2569 | 83 | {\r |
84 | //\r | |
85 | // The end of variable store\r | |
86 | //\r | |
87 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r | |
88 | }\r | |
89 | \r | |
bcd70414 | 90 | /**\r |
130e2569 | 91 | This code gets the pointer to the last variable memory pointer byte\r |
92 | \r | |
bcd70414 | 93 | @param VarStoreHeader Pointer to the Variable Store Header.\r |
130e2569 | 94 | \r |
fdb05fa3 | 95 | @return VARIABLE_HEADER* Pointer to last unavailable Variable Header\r |
130e2569 | 96 | \r |
bcd70414 | 97 | **/\r |
98 | VARIABLE_HEADER *\r | |
99 | GetEndPointer (\r | |
100 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
101 | )\r | |
7ba905c9 | 102 | \r |
7ba905c9 | 103 | {\r |
130e2569 | 104 | //\r |
105 | // The end of variable store\r | |
106 | //\r | |
107 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r | |
7ba905c9 | 108 | }\r |
109 | \r | |
bcd70414 | 110 | /**\r |
111 | \r | |
112 | This code checks if variable header is valid or not.\r | |
113 | \r | |
114 | @param Variable Pointer to the Variable Header.\r | |
115 | \r | |
116 | @retval TRUE Variable header is valid.\r | |
117 | @retval FALSE Variable header is not valid.\r | |
118 | \r | |
119 | **/\r | |
7ba905c9 | 120 | STATIC\r |
121 | BOOLEAN\r | |
122 | EFIAPI\r | |
123 | IsValidVariableHeader (\r | |
124 | IN VARIABLE_HEADER *Variable\r | |
125 | )\r | |
7ba905c9 | 126 | {\r |
9cad030b | 127 | if (Variable == NULL || Variable->StartId != VARIABLE_DATA ) {\r |
7ba905c9 | 128 | return FALSE;\r |
129 | }\r | |
130 | \r | |
131 | return TRUE;\r | |
132 | }\r | |
133 | \r | |
bcd70414 | 134 | /**\r |
135 | This code gets the size of name of variable.\r | |
136 | \r | |
137 | @param Variable Pointer to the Variable Header.\r | |
130e2569 | 138 | \r |
fdb05fa3 | 139 | @return UINTN Size of variable in bytes\r |
bcd70414 | 140 | \r |
141 | **/\r | |
130e2569 | 142 | UINTN\r |
143 | NameSizeOfVariable (\r | |
144 | IN VARIABLE_HEADER *Variable\r | |
145 | )\r | |
130e2569 | 146 | {\r |
147 | if (Variable->State == (UINT8) (-1) ||\r | |
148 | Variable->DataSize == (UINT32) -1 ||\r | |
149 | Variable->NameSize == (UINT32) -1 ||\r | |
150 | Variable->Attributes == (UINT32) -1) {\r | |
151 | return 0;\r | |
152 | }\r | |
153 | return (UINTN) Variable->NameSize;\r | |
154 | }\r | |
155 | \r | |
bcd70414 | 156 | /**\r |
130e2569 | 157 | This code gets the size of name of variable.\r |
158 | \r | |
bcd70414 | 159 | @param Variable Pointer to the Variable Header.\r |
130e2569 | 160 | \r |
fdb05fa3 | 161 | @return UINTN Size of variable in bytes\r |
130e2569 | 162 | \r |
bcd70414 | 163 | **/\r |
164 | UINTN\r | |
165 | DataSizeOfVariable (\r | |
166 | IN VARIABLE_HEADER *Variable\r | |
167 | )\r | |
130e2569 | 168 | {\r |
169 | if (Variable->State == (UINT8) -1 ||\r | |
170 | Variable->DataSize == (UINT32) -1 ||\r | |
171 | Variable->NameSize == (UINT32) -1 ||\r | |
172 | Variable->Attributes == (UINT32) -1) {\r | |
173 | return 0;\r | |
174 | }\r | |
175 | return (UINTN) Variable->DataSize;\r | |
176 | }\r | |
177 | \r | |
bcd70414 | 178 | /**\r |
130e2569 | 179 | This code gets the pointer to the variable name.\r |
180 | \r | |
bcd70414 | 181 | @param Variable Pointer to the Variable Header.\r |
130e2569 | 182 | \r |
fdb05fa3 | 183 | @return CHAR16* Pointer to Variable Name\r |
130e2569 | 184 | \r |
bcd70414 | 185 | **/\r |
186 | CHAR16 *\r | |
187 | GetVariableNamePtr (\r | |
188 | IN VARIABLE_HEADER *Variable\r | |
189 | )\r | |
130e2569 | 190 | \r |
130e2569 | 191 | {\r |
192 | \r | |
193 | return (CHAR16 *) (Variable + 1);\r | |
194 | }\r | |
195 | \r | |
bcd70414 | 196 | /**\r |
197 | This code gets the pointer to the variable data.\r | |
198 | \r | |
199 | @param Variable Pointer to the Variable Header.\r | |
200 | \r | |
fdb05fa3 | 201 | @return UINT8* Pointer to Variable Data\r |
130e2569 | 202 | \r |
bcd70414 | 203 | **/\r |
130e2569 | 204 | UINT8 *\r |
205 | GetVariableDataPtr (\r | |
206 | IN VARIABLE_HEADER *Variable\r | |
207 | )\r | |
130e2569 | 208 | {\r |
209 | UINTN Value;\r | |
210 | \r | |
211 | //\r | |
212 | // Be careful about pad size for alignment\r | |
213 | //\r | |
214 | Value = (UINTN) GetVariableNamePtr (Variable);\r | |
215 | Value += NameSizeOfVariable (Variable);\r | |
216 | Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r | |
217 | \r | |
218 | return (UINT8 *) Value;\r | |
219 | }\r | |
220 | \r | |
bcd70414 | 221 | /**\r |
130e2569 | 222 | This code gets the pointer to the next variable header.\r |
223 | \r | |
bcd70414 | 224 | @param Variable Pointer to the Variable Header.\r |
130e2569 | 225 | \r |
fdb05fa3 | 226 | @return VARIABLE_HEADER* Pointer to next variable header.\r |
130e2569 | 227 | \r |
bcd70414 | 228 | **/\r |
229 | VARIABLE_HEADER *\r | |
230 | GetNextVariablePtr (\r | |
231 | IN VARIABLE_HEADER *Variable\r | |
232 | )\r | |
130e2569 | 233 | \r |
130e2569 | 234 | {\r |
235 | UINTN Value;\r | |
236 | \r | |
237 | if (!IsValidVariableHeader (Variable)) {\r | |
238 | return NULL;\r | |
239 | }\r | |
240 | \r | |
241 | Value = (UINTN) GetVariableDataPtr (Variable);\r | |
242 | Value += DataSizeOfVariable (Variable);\r | |
243 | Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r | |
244 | \r | |
245 | //\r | |
246 | // Be careful about pad size for alignment\r | |
247 | //\r | |
248 | return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r | |
249 | }\r | |
250 | \r | |
bcd70414 | 251 | /**\r |
252 | This code gets the pointer to the variable name.\r | |
253 | \r | |
254 | @param VarStoreHeader Pointer to the Variable Store Header.\r | |
130e2569 | 255 | \r |
bcd70414 | 256 | @retval EfiRaw Variable store is raw\r |
257 | @retval EfiValid Variable store is valid\r | |
258 | @retval EfiInvalid Variable store is invalid\r | |
259 | \r | |
260 | **/\r | |
7ba905c9 | 261 | STATIC\r |
262 | VARIABLE_STORE_STATUS\r | |
263 | EFIAPI\r | |
264 | GetVariableStoreStatus (\r | |
265 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
266 | )\r | |
7ba905c9 | 267 | \r |
7ba905c9 | 268 | {\r |
269 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r | |
270 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r | |
271 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r | |
272 | ) {\r | |
273 | \r | |
274 | return EfiValid;\r | |
275 | }\r | |
276 | \r | |
277 | if (VarStoreHeader->Signature == 0xffffffff &&\r | |
278 | VarStoreHeader->Size == 0xffffffff &&\r | |
279 | VarStoreHeader->Format == 0xff &&\r | |
280 | VarStoreHeader->State == 0xff\r | |
281 | ) {\r | |
282 | \r | |
283 | return EfiRaw;\r | |
284 | } else {\r | |
285 | return EfiInvalid;\r | |
286 | }\r | |
287 | }\r | |
288 | \r | |
bcd70414 | 289 | /**\r |
290 | This function compares a variable with variable entries in database\r | |
291 | \r | |
292 | @param Variable - Pointer to the variable in our database\r | |
293 | @param VariableName - Name of the variable to compare to 'Variable'\r | |
294 | @param VendorGuid - GUID of the variable to compare to 'Variable'\r | |
295 | @param PtrTrack - Variable Track Pointer structure that contains\r | |
296 | Variable Information.\r | |
297 | \r | |
fdb05fa3 | 298 | @retval EFI_SUCCESS - Found match variable\r |
bcd70414 | 299 | @retval EFI_NOT_FOUND - Variable not found\r |
300 | \r | |
301 | **/\r | |
7ba905c9 | 302 | STATIC\r |
303 | EFI_STATUS\r | |
304 | CompareWithValidVariable (\r | |
305 | IN VARIABLE_HEADER *Variable,\r | |
306 | IN CONST CHAR16 *VariableName,\r | |
307 | IN CONST EFI_GUID *VendorGuid,\r | |
308 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r | |
309 | )\r | |
7ba905c9 | 310 | \r |
7ba905c9 | 311 | {\r |
130e2569 | 312 | VOID *Point;\r |
313 | \r | |
7ba905c9 | 314 | if (VariableName[0] == 0) {\r |
315 | PtrTrack->CurrPtr = Variable;\r | |
316 | return EFI_SUCCESS;\r | |
317 | } else {\r | |
318 | //\r | |
319 | // Don't use CompareGuid function here for performance reasons.\r | |
320 | // Instead we compare the GUID a UINT32 at a time and branch\r | |
321 | // on the first failed comparison.\r | |
322 | //\r | |
323 | if ((((INT32 *) VendorGuid)[0] == ((INT32 *) &Variable->VendorGuid)[0]) &&\r | |
324 | (((INT32 *) VendorGuid)[1] == ((INT32 *) &Variable->VendorGuid)[1]) &&\r | |
325 | (((INT32 *) VendorGuid)[2] == ((INT32 *) &Variable->VendorGuid)[2]) &&\r | |
326 | (((INT32 *) VendorGuid)[3] == ((INT32 *) &Variable->VendorGuid)[3])\r | |
327 | ) {\r | |
130e2569 | 328 | ASSERT (NameSizeOfVariable (Variable) != 0);\r |
329 | Point = (VOID *) GetVariableNamePtr (Variable);\r | |
330 | if (!CompareMem (VariableName, Point, NameSizeOfVariable (Variable))) {\r | |
7ba905c9 | 331 | PtrTrack->CurrPtr = Variable;\r |
332 | return EFI_SUCCESS;\r | |
333 | }\r | |
334 | }\r | |
335 | }\r | |
336 | \r | |
337 | return EFI_NOT_FOUND;\r | |
338 | }\r | |
339 | \r | |
bcd70414 | 340 | /**\r |
341 | This code finds variable in storage blocks (Non-Volatile)\r | |
342 | \r | |
343 | @param PeiServices - General purpose services available to every PEIM.\r | |
344 | @param VariableName - Name of the variable to be found\r | |
345 | @param VendorGuid - Vendor GUID to be found.\r | |
346 | @param PtrTrack - Variable Track Pointer structure that contains\r | |
347 | Variable Information.\r | |
348 | \r | |
349 | @retval EFI_SUCCESS - Variable found successfully\r | |
350 | @retval EFI_NOT_FOUND - Variable not found\r | |
351 | @retval EFI_INVALID_PARAMETER - Invalid variable name\r | |
352 | \r | |
353 | **/\r | |
7ba905c9 | 354 | STATIC\r |
355 | EFI_STATUS\r | |
356 | EFIAPI\r | |
357 | FindVariable (\r | |
358 | IN EFI_PEI_SERVICES **PeiServices,\r | |
359 | IN CONST CHAR16 *VariableName,\r | |
360 | IN CONST EFI_GUID *VendorGuid,\r | |
361 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r | |
362 | )\r | |
7ba905c9 | 363 | \r |
7ba905c9 | 364 | {\r |
365 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
366 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
367 | VARIABLE_HEADER *Variable;\r | |
368 | VARIABLE_HEADER *MaxIndex;\r | |
369 | VARIABLE_INDEX_TABLE *IndexTable;\r | |
370 | UINT32 Count;\r | |
371 | UINT8 *VariableBase;\r | |
372 | \r | |
373 | if (VariableName != 0 && VendorGuid == NULL) {\r | |
374 | return EFI_INVALID_PARAMETER;\r | |
375 | }\r | |
376 | //\r | |
377 | // No Variable Address equals zero, so 0 as initial value is safe.\r | |
378 | //\r | |
379 | MaxIndex = 0;\r | |
380 | \r | |
381 | GuidHob = GetFirstGuidHob (&mEfiVariableIndexTableGuid);\r | |
382 | if (GuidHob == NULL) {\r | |
383 | IndexTable = BuildGuidHob (&mEfiVariableIndexTableGuid, sizeof (VARIABLE_INDEX_TABLE));\r | |
384 | IndexTable->Length = 0;\r | |
385 | IndexTable->StartPtr = NULL;\r | |
386 | IndexTable->EndPtr = NULL;\r | |
387 | IndexTable->GoneThrough = 0;\r | |
388 | } else {\r | |
389 | IndexTable = GET_GUID_HOB_DATA (GuidHob);\r | |
390 | for (Count = 0; Count < IndexTable->Length; Count++)\r | |
391 | {\r | |
392 | MaxIndex = GetVariableByIndex (IndexTable, Count);\r | |
130e2569 | 393 | \r |
7ba905c9 | 394 | if (CompareWithValidVariable (MaxIndex, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r |
395 | PtrTrack->StartPtr = IndexTable->StartPtr;\r | |
396 | PtrTrack->EndPtr = IndexTable->EndPtr;\r | |
397 | \r | |
398 | return EFI_SUCCESS;\r | |
399 | }\r | |
400 | }\r | |
401 | \r | |
402 | if (IndexTable->GoneThrough) {\r | |
403 | return EFI_NOT_FOUND;\r | |
404 | }\r | |
405 | }\r | |
406 | //\r | |
407 | // If not found in HOB, then let's start from the MaxIndex we've found.\r | |
408 | //\r | |
409 | if (MaxIndex != NULL) {\r | |
410 | Variable = GetNextVariablePtr (MaxIndex);\r | |
411 | } else {\r | |
412 | if (IndexTable->StartPtr || IndexTable->EndPtr) {\r | |
413 | Variable = IndexTable->StartPtr;\r | |
414 | } else {\r | |
415 | VariableBase = (UINT8 *) (UINTN) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
416 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (VariableBase + \\r | |
417 | ((EFI_FIRMWARE_VOLUME_HEADER *) (VariableBase)) -> HeaderLength);\r | |
418 | \r | |
419 | if (GetVariableStoreStatus (VariableStoreHeader) != EfiValid) {\r | |
420 | return EFI_UNSUPPORTED;\r | |
421 | }\r | |
422 | \r | |
423 | if (~VariableStoreHeader->Size == 0) {\r | |
424 | return EFI_NOT_FOUND;\r | |
425 | }\r | |
426 | //\r | |
427 | // Find the variable by walk through non-volatile variable store\r | |
428 | //\r | |
130e2569 | 429 | IndexTable->StartPtr = GetStartPointer (VariableStoreHeader);\r |
430 | IndexTable->EndPtr = GetEndPointer (VariableStoreHeader);\r | |
7ba905c9 | 431 | \r |
432 | //\r | |
433 | // Start Pointers for the variable.\r | |
434 | // Actual Data Pointer where data can be written.\r | |
435 | //\r | |
436 | Variable = IndexTable->StartPtr;\r | |
437 | }\r | |
438 | }\r | |
439 | //\r | |
440 | // Find the variable by walk through non-volatile variable store\r | |
441 | //\r | |
442 | PtrTrack->StartPtr = IndexTable->StartPtr;\r | |
443 | PtrTrack->EndPtr = IndexTable->EndPtr;\r | |
444 | \r | |
445 | while (IsValidVariableHeader (Variable) && (Variable <= IndexTable->EndPtr)) {\r | |
446 | if (Variable->State == VAR_ADDED) {\r | |
447 | //\r | |
448 | // Record Variable in VariableIndex HOB\r | |
449 | //\r | |
450 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME)\r | |
451 | {\r | |
452 | VariableIndexTableUpdate (IndexTable, Variable);\r | |
453 | }\r | |
454 | \r | |
455 | if (CompareWithValidVariable (Variable, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r | |
456 | return EFI_SUCCESS;\r | |
457 | }\r | |
458 | }\r | |
459 | \r | |
460 | Variable = GetNextVariablePtr (Variable);\r | |
461 | }\r | |
462 | //\r | |
463 | // If gone through the VariableStore, that means we never find in Firmware any more.\r | |
464 | //\r | |
465 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME) {\r | |
466 | IndexTable->GoneThrough = 1;\r | |
467 | }\r | |
468 | \r | |
469 | PtrTrack->CurrPtr = NULL;\r | |
470 | \r | |
471 | return EFI_NOT_FOUND;\r | |
472 | }\r | |
473 | \r | |
bcd70414 | 474 | /**\r |
7ba905c9 | 475 | Provide the read variable functionality of the variable services.\r |
476 | \r | |
bcd70414 | 477 | @param PeiServices - General purpose services available to every PEIM.\r |
7ba905c9 | 478 | \r |
bcd70414 | 479 | @param VariableName - The variable name\r |
7ba905c9 | 480 | \r |
bcd70414 | 481 | @param VendorGuid - The vendor's GUID\r |
7ba905c9 | 482 | \r |
bcd70414 | 483 | @param Attributes - Pointer to the attribute\r |
7ba905c9 | 484 | \r |
bcd70414 | 485 | @param DataSize - Size of data\r |
7ba905c9 | 486 | \r |
bcd70414 | 487 | @param Data - Pointer to data\r |
7ba905c9 | 488 | \r |
bcd70414 | 489 | @retval EFI_SUCCESS - The interface could be successfully installed\r |
7ba905c9 | 490 | \r |
bcd70414 | 491 | @retval EFI_NOT_FOUND - The variable could not be discovered\r |
7ba905c9 | 492 | \r |
bcd70414 | 493 | @retval EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r |
7ba905c9 | 494 | \r |
bcd70414 | 495 | **/\r |
496 | EFI_STATUS\r | |
497 | EFIAPI\r | |
498 | PeiGetVariable (\r | |
499 | IN EFI_PEI_SERVICES **PeiServices,\r | |
500 | IN CHAR16 *VariableName,\r | |
501 | IN EFI_GUID * VendorGuid,\r | |
502 | OUT UINT32 *Attributes OPTIONAL,\r | |
503 | IN OUT UINTN *DataSize,\r | |
504 | OUT VOID *Data\r | |
505 | )\r | |
7ba905c9 | 506 | \r |
7ba905c9 | 507 | {\r |
508 | VARIABLE_POINTER_TRACK Variable;\r | |
509 | UINTN VarDataSize;\r | |
510 | EFI_STATUS Status;\r | |
511 | \r | |
de631489 | 512 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r |
7ba905c9 | 513 | return EFI_INVALID_PARAMETER;\r |
514 | }\r | |
515 | //\r | |
516 | // Find existing variable\r | |
517 | //\r | |
518 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r | |
519 | \r | |
520 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r | |
521 | return Status;\r | |
522 | }\r | |
523 | //\r | |
524 | // Get data size\r | |
525 | //\r | |
130e2569 | 526 | VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r |
7ba905c9 | 527 | if (*DataSize >= VarDataSize) {\r |
fd431a9b | 528 | //\r |
529 | // PO-TKW: Address one checking in this place\r | |
530 | //\r | |
531 | if (Data == NULL) {\r | |
532 | return EFI_INVALID_PARAMETER;\r | |
533 | }\r | |
534 | \r | |
130e2569 | 535 | (*PeiServices)->CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r |
7ba905c9 | 536 | \r |
537 | if (Attributes != NULL) {\r | |
538 | *Attributes = Variable.CurrPtr->Attributes;\r | |
539 | }\r | |
540 | \r | |
541 | *DataSize = VarDataSize;\r | |
542 | return EFI_SUCCESS;\r | |
543 | } else {\r | |
544 | *DataSize = VarDataSize;\r | |
545 | return EFI_BUFFER_TOO_SMALL;\r | |
546 | }\r | |
547 | }\r | |
548 | \r | |
bcd70414 | 549 | /**\r |
7ba905c9 | 550 | Provide the read variable functionality of the variable services.\r |
551 | \r | |
bcd70414 | 552 | @param PeiServices - General purpose services available to every PEIM.\r |
7ba905c9 | 553 | \r |
bcd70414 | 554 | @param VariableName - The variable name\r |
7ba905c9 | 555 | \r |
bcd70414 | 556 | @param VendorGuid - The vendor's GUID\r |
7ba905c9 | 557 | \r |
bcd70414 | 558 | @param Attributes - Pointer to the attribute\r |
7ba905c9 | 559 | \r |
bcd70414 | 560 | @param DataSize - Size of data\r |
7ba905c9 | 561 | \r |
bcd70414 | 562 | @param Data - Pointer to data\r |
7ba905c9 | 563 | \r |
bcd70414 | 564 | @retval EFI_SUCCESS - The interface could be successfully installed\r |
7ba905c9 | 565 | \r |
bcd70414 | 566 | @retval EFI_NOT_FOUND - The variable could not be discovered\r |
7ba905c9 | 567 | \r |
bcd70414 | 568 | @retval EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r |
7ba905c9 | 569 | \r |
bcd70414 | 570 | **/\r |
571 | EFI_STATUS\r | |
572 | EFIAPI\r | |
573 | PeiGetVariable2 (\r | |
574 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
575 | IN CONST CHAR16 *VariableName,\r | |
576 | IN CONST EFI_GUID *VariableGuid,\r | |
577 | OUT UINT32 *Attributes,\r | |
578 | IN OUT UINTN *DataSize,\r | |
579 | OUT VOID *Data\r | |
580 | )\r | |
7ba905c9 | 581 | \r |
7ba905c9 | 582 | {\r |
583 | return PeiGetVariable (\r | |
584 | GetPeiServicesTablePointer (),\r | |
585 | (CHAR16*)VariableName,\r | |
586 | (EFI_GUID*)VariableGuid,\r | |
587 | Attributes,\r | |
588 | DataSize,\r | |
589 | Data\r | |
590 | );\r | |
591 | }\r | |
592 | \r | |
bcd70414 | 593 | /**\r |
7ba905c9 | 594 | Provide the get next variable functionality of the variable services.\r |
595 | \r | |
bcd70414 | 596 | @param PeiServices - General purpose services available to every PEIM.\r |
597 | @param VariabvleNameSize - The variable name's size.\r | |
598 | @param VariableName - A pointer to the variable's name.\r | |
599 | @param VendorGuid - A pointer to the EFI_GUID structure.\r | |
7ba905c9 | 600 | \r |
bcd70414 | 601 | @param VariableNameSize - Size of the variable name\r |
7ba905c9 | 602 | \r |
bcd70414 | 603 | @param VariableName - The variable name\r |
7ba905c9 | 604 | \r |
bcd70414 | 605 | @param VendorGuid - The vendor's GUID\r |
7ba905c9 | 606 | \r |
bcd70414 | 607 | @retval EFI_SUCCESS - The interface could be successfully installed\r |
7ba905c9 | 608 | \r |
bcd70414 | 609 | @retval EFI_NOT_FOUND - The variable could not be discovered\r |
7ba905c9 | 610 | \r |
bcd70414 | 611 | **/\r |
612 | EFI_STATUS\r | |
613 | EFIAPI\r | |
614 | PeiGetNextVariableName (\r | |
615 | IN EFI_PEI_SERVICES **PeiServices,\r | |
616 | IN OUT UINTN *VariableNameSize,\r | |
617 | IN OUT CHAR16 *VariableName,\r | |
618 | IN OUT EFI_GUID *VendorGuid\r | |
619 | )\r | |
7ba905c9 | 620 | \r |
7ba905c9 | 621 | {\r |
622 | VARIABLE_POINTER_TRACK Variable;\r | |
623 | UINTN VarNameSize;\r | |
624 | EFI_STATUS Status;\r | |
625 | \r | |
de631489 | 626 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r |
7ba905c9 | 627 | return EFI_INVALID_PARAMETER;\r |
628 | }\r | |
629 | \r | |
630 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r | |
631 | \r | |
632 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r | |
633 | return Status;\r | |
634 | }\r | |
635 | \r | |
636 | if (VariableName[0] != 0) {\r | |
637 | //\r | |
638 | // If variable name is not NULL, get next variable\r | |
639 | //\r | |
640 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
641 | }\r | |
642 | \r | |
643 | while (!(Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL)) {\r | |
644 | if (IsValidVariableHeader (Variable.CurrPtr)) {\r | |
645 | if (Variable.CurrPtr->State == VAR_ADDED) {\r | |
130e2569 | 646 | ASSERT (NameSizeOfVariable (Variable.CurrPtr) != 0);\r |
9cad030b | 647 | \r |
130e2569 | 648 | VarNameSize = (UINTN) NameSizeOfVariable (Variable.CurrPtr);\r |
7ba905c9 | 649 | if (VarNameSize <= *VariableNameSize) {\r |
130e2569 | 650 | (*PeiServices)->CopyMem (VariableName, GetVariableNamePtr (Variable.CurrPtr), VarNameSize);\r |
7ba905c9 | 651 | \r |
652 | (*PeiServices)->CopyMem (VendorGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));\r | |
653 | \r | |
654 | Status = EFI_SUCCESS;\r | |
655 | } else {\r | |
656 | Status = EFI_BUFFER_TOO_SMALL;\r | |
657 | }\r | |
658 | \r | |
659 | *VariableNameSize = VarNameSize;\r | |
660 | return Status;\r | |
661 | //\r | |
662 | // Variable is found\r | |
663 | //\r | |
664 | } else {\r | |
665 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
666 | }\r | |
667 | } else {\r | |
668 | break;\r | |
669 | }\r | |
670 | }\r | |
671 | \r | |
672 | return EFI_NOT_FOUND;\r | |
673 | }\r | |
674 | \r | |
bcd70414 | 675 | /**\r |
7ba905c9 | 676 | Provide the get next variable functionality of the variable services.\r |
677 | \r | |
bcd70414 | 678 | @param PeiServices - General purpose services available to every PEIM.\r |
679 | @param VariabvleNameSize - The variable name's size.\r | |
680 | @param VariableName - A pointer to the variable's name.\r | |
681 | @param VariableGuid - A pointer to the EFI_GUID structure.\r | |
7ba905c9 | 682 | \r |
bcd70414 | 683 | @param VariableNameSize - Size of the variable name\r |
7ba905c9 | 684 | \r |
bcd70414 | 685 | @param VariableName - The variable name\r |
7ba905c9 | 686 | \r |
bcd70414 | 687 | @param VendorGuid - The vendor's GUID\r |
7ba905c9 | 688 | \r |
7ba905c9 | 689 | \r |
bcd70414 | 690 | @retval EFI_SUCCESS - The interface could be successfully installed\r |
7ba905c9 | 691 | \r |
bcd70414 | 692 | @retval EFI_NOT_FOUND - The variable could not be discovered\r |
7ba905c9 | 693 | \r |
bcd70414 | 694 | **/\r |
695 | EFI_STATUS\r | |
696 | EFIAPI\r | |
697 | PeiGetNextVariableName2 (\r | |
698 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
699 | IN OUT UINTN *VariableNameSize,\r | |
700 | IN OUT CHAR16 *VariableName,\r | |
701 | IN OUT EFI_GUID *VariableGuid\r | |
702 | )\r | |
7ba905c9 | 703 | \r |
7ba905c9 | 704 | {\r |
705 | return PeiGetNextVariableName (\r | |
706 | GetPeiServicesTablePointer (),\r | |
707 | VariableNameSize,\r | |
708 | VariableName,\r | |
709 | VariableGuid\r | |
710 | );\r | |
6bee1632 | 711 | }\r |
bcd70414 | 712 | \r |