]>
Commit | Line | Data |
---|---|---|
7ba905c9 | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006 - 2007 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 | Framework PEIM to provide the Variable functionality\r | |
18 | \r | |
19 | --*/\r | |
20 | \r | |
21 | \r | |
22 | #include "Variable.h"\r | |
23 | \r | |
24 | //\r | |
25 | // Module globals\r | |
26 | //\r | |
27 | static EFI_PEI_READ_ONLY_VARIABLE_PPI mVariablePpi = {\r | |
28 | PeiGetVariable,\r | |
29 | PeiGetNextVariableName\r | |
30 | };\r | |
31 | \r | |
32 | static EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariable2Ppi = {\r | |
33 | PeiGetVariable2,\r | |
34 | PeiGetNextVariableName2\r | |
35 | };\r | |
36 | \r | |
37 | static EFI_PEI_PPI_DESCRIPTOR mPpiListVariable[] = {\r | |
38 | {\r | |
39 | (EFI_PEI_PPI_DESCRIPTOR_PPI),\r | |
40 | &gEfiPeiReadOnlyVariable2PpiGuid,\r | |
41 | &mVariable2Ppi\r | |
42 | },\r | |
43 | {\r | |
44 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
45 | &gEfiPeiReadOnlyVariablePpiGuid,\r | |
46 | &mVariablePpi\r | |
47 | }\r | |
48 | };\r | |
49 | \r | |
50 | EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID;\r | |
51 | \r | |
52 | EFI_STATUS\r | |
53 | EFIAPI\r | |
54 | PeimInitializeVariableServices (\r | |
55 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
56 | IN EFI_PEI_SERVICES **PeiServices\r | |
57 | )\r | |
58 | /*++\r | |
59 | \r | |
60 | Routine Description:\r | |
61 | \r | |
62 | Provide the functionality of the variable services.\r | |
63 | \r | |
64 | Arguments:\r | |
65 | \r | |
66 | FfsHeadher - The FFS file header\r | |
67 | PeiServices - General purpose services available to every PEIM.\r | |
68 | \r | |
69 | Returns:\r | |
70 | \r | |
71 | Status - EFI_SUCCESS if the interface could be successfully\r | |
72 | installed\r | |
73 | \r | |
74 | --*/\r | |
75 | {\r | |
76 | //\r | |
77 | // Publish the variable capability to other modules\r | |
78 | //\r | |
507b36ca | 79 | return (**PeiServices).InstallPpi ((CONST EFI_PEI_SERVICES **) PeiServices, &mPpiListVariable[0]);\r |
7ba905c9 | 80 | \r |
81 | }\r | |
82 | \r | |
9cad030b | 83 | \r |
84 | UINT32\r | |
85 | NameSizeOfVariable (\r | |
86 | IN VARIABLE_HEADER *Variable\r | |
87 | )\r | |
88 | {\r | |
89 | //\r | |
90 | // Check whether the header is valid fully;\r | |
91 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
92 | // \r | |
93 | if (Variable->DataSize == (UINT32) -1 || \r | |
94 | Variable->Attributes == (UINT32) -1 || \r | |
95 | Variable->NameSize == (UINT32) -1) {\r | |
96 | return 0;\r | |
97 | }\r | |
98 | return Variable->NameSize;\r | |
99 | }\r | |
100 | \r | |
101 | UINT32\r | |
102 | DataSizeOfVariable (\r | |
103 | IN VARIABLE_HEADER *Variable\r | |
104 | )\r | |
105 | {\r | |
106 | //\r | |
107 | // Check whether the header is valid fully;\r | |
108 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
109 | // \r | |
110 | if (Variable->DataSize == (UINT32) -1 || \r | |
111 | Variable->Attributes == (UINT32) -1 || \r | |
112 | Variable->NameSize == (UINT32) -1) {\r | |
113 | return 0;\r | |
114 | }\r | |
115 | return Variable->DataSize;\r | |
116 | }\r | |
117 | \r | |
118 | UINT32\r | |
119 | AttributesOfVariable (\r | |
120 | IN VARIABLE_HEADER *Variable\r | |
121 | )\r | |
122 | {\r | |
123 | \r | |
124 | //\r | |
125 | // Check whether the header is valid fully;\r | |
126 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
127 | // \r | |
128 | if (Variable->DataSize == (UINT32) -1 || \r | |
129 | Variable->Attributes == (UINT32) -1 || \r | |
130 | Variable->NameSize == (UINT32) -1) {\r | |
131 | return 0;\r | |
132 | }\r | |
133 | return Variable->Attributes;\r | |
134 | }\r | |
135 | \r | |
7ba905c9 | 136 | STATIC\r |
137 | VARIABLE_HEADER *\r | |
138 | GetNextVariablePtr (\r | |
139 | IN VARIABLE_HEADER *Variable\r | |
140 | )\r | |
141 | /*++\r | |
142 | \r | |
143 | Routine Description:\r | |
144 | \r | |
145 | This code checks if variable header is valid or not.\r | |
146 | \r | |
147 | Arguments:\r | |
148 | Variable Pointer to the Variable Header.\r | |
149 | \r | |
150 | Returns:\r | |
151 | TRUE Variable header is valid.\r | |
152 | FALSE Variable header is not valid.\r | |
153 | \r | |
154 | --*/\r | |
155 | {\r | |
9cad030b | 156 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) GET_VARIABLE_DATA_PTR (Variable) + DataSizeOfVariable (Variable) + GET_PAD_SIZE (DataSizeOfVariable (Variable)));\r |
7ba905c9 | 157 | }\r |
158 | \r | |
159 | STATIC\r | |
160 | BOOLEAN\r | |
161 | EFIAPI\r | |
162 | IsValidVariableHeader (\r | |
163 | IN VARIABLE_HEADER *Variable\r | |
164 | )\r | |
165 | /*++\r | |
166 | \r | |
167 | Routine Description:\r | |
168 | \r | |
169 | This code checks if variable header is valid or not.\r | |
170 | \r | |
171 | Arguments:\r | |
172 | Variable Pointer to the Variable Header.\r | |
173 | \r | |
174 | Returns:\r | |
175 | TRUE Variable header is valid.\r | |
176 | FALSE Variable header is not valid.\r | |
177 | \r | |
178 | --*/\r | |
179 | {\r | |
9cad030b | 180 | if (Variable == NULL || Variable->StartId != VARIABLE_DATA ) {\r |
7ba905c9 | 181 | return FALSE;\r |
182 | }\r | |
183 | \r | |
184 | return TRUE;\r | |
185 | }\r | |
186 | \r | |
187 | STATIC\r | |
188 | VARIABLE_STORE_STATUS\r | |
189 | EFIAPI\r | |
190 | GetVariableStoreStatus (\r | |
191 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
192 | )\r | |
193 | /*++\r | |
194 | \r | |
195 | Routine Description:\r | |
196 | \r | |
197 | This code gets the pointer to the variable name.\r | |
198 | \r | |
199 | Arguments:\r | |
200 | \r | |
201 | VarStoreHeader Pointer to the Variable Store Header.\r | |
202 | \r | |
203 | Returns:\r | |
204 | \r | |
205 | EfiRaw Variable store is raw\r | |
206 | EfiValid Variable store is valid\r | |
207 | EfiInvalid Variable store is invalid\r | |
208 | \r | |
209 | --*/\r | |
210 | {\r | |
211 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r | |
212 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r | |
213 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r | |
214 | ) {\r | |
215 | \r | |
216 | return EfiValid;\r | |
217 | }\r | |
218 | \r | |
219 | if (VarStoreHeader->Signature == 0xffffffff &&\r | |
220 | VarStoreHeader->Size == 0xffffffff &&\r | |
221 | VarStoreHeader->Format == 0xff &&\r | |
222 | VarStoreHeader->State == 0xff\r | |
223 | ) {\r | |
224 | \r | |
225 | return EfiRaw;\r | |
226 | } else {\r | |
227 | return EfiInvalid;\r | |
228 | }\r | |
229 | }\r | |
230 | \r | |
231 | STATIC\r | |
232 | EFI_STATUS\r | |
233 | CompareWithValidVariable (\r | |
234 | IN VARIABLE_HEADER *Variable,\r | |
235 | IN CONST CHAR16 *VariableName,\r | |
236 | IN CONST EFI_GUID *VendorGuid,\r | |
237 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r | |
238 | )\r | |
239 | /*++\r | |
240 | \r | |
241 | Routine Description:\r | |
242 | \r | |
243 | This function compares a variable with variable entries in database\r | |
244 | \r | |
245 | Arguments:\r | |
246 | \r | |
247 | Variable - Pointer to the variable in our database\r | |
248 | VariableName - Name of the variable to compare to 'Variable'\r | |
249 | VendorGuid - GUID of the variable to compare to 'Variable'\r | |
250 | PtrTrack - Variable Track Pointer structure that contains\r | |
251 | Variable Information.\r | |
252 | \r | |
253 | Returns:\r | |
254 | \r | |
255 | EFI_SUCCESS - Found match variable\r | |
256 | EFI_NOT_FOUND - Variable not found\r | |
257 | \r | |
258 | --*/\r | |
259 | {\r | |
260 | if (VariableName[0] == 0) {\r | |
261 | PtrTrack->CurrPtr = Variable;\r | |
262 | return EFI_SUCCESS;\r | |
263 | } else {\r | |
264 | //\r | |
265 | // Don't use CompareGuid function here for performance reasons.\r | |
266 | // Instead we compare the GUID a UINT32 at a time and branch\r | |
267 | // on the first failed comparison.\r | |
268 | //\r | |
269 | if ((((INT32 *) VendorGuid)[0] == ((INT32 *) &Variable->VendorGuid)[0]) &&\r | |
270 | (((INT32 *) VendorGuid)[1] == ((INT32 *) &Variable->VendorGuid)[1]) &&\r | |
271 | (((INT32 *) VendorGuid)[2] == ((INT32 *) &Variable->VendorGuid)[2]) &&\r | |
272 | (((INT32 *) VendorGuid)[3] == ((INT32 *) &Variable->VendorGuid)[3])\r | |
273 | ) {\r | |
9cad030b | 274 | ASSERT (NameSizeOfVariable (Variable) != 0);\r |
275 | if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable), NameSizeOfVariable (Variable))) {\r | |
7ba905c9 | 276 | PtrTrack->CurrPtr = Variable;\r |
277 | return EFI_SUCCESS;\r | |
278 | }\r | |
279 | }\r | |
280 | }\r | |
281 | \r | |
282 | return EFI_NOT_FOUND;\r | |
283 | }\r | |
284 | \r | |
285 | STATIC\r | |
286 | EFI_STATUS\r | |
287 | EFIAPI\r | |
288 | FindVariable (\r | |
289 | IN EFI_PEI_SERVICES **PeiServices,\r | |
290 | IN CONST CHAR16 *VariableName,\r | |
291 | IN CONST EFI_GUID *VendorGuid,\r | |
292 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r | |
293 | )\r | |
294 | /*++\r | |
295 | \r | |
296 | Routine Description:\r | |
297 | \r | |
298 | This code finds variable in storage blocks (Non-Volatile)\r | |
299 | \r | |
300 | Arguments:\r | |
301 | \r | |
302 | PeiServices - General purpose services available to every PEIM.\r | |
303 | VariableName - Name of the variable to be found\r | |
304 | VendorGuid - Vendor GUID to be found.\r | |
305 | PtrTrack - Variable Track Pointer structure that contains\r | |
306 | Variable Information.\r | |
307 | \r | |
308 | Returns:\r | |
309 | \r | |
310 | EFI_SUCCESS - Variable found successfully\r | |
311 | EFI_NOT_FOUND - Variable not found\r | |
312 | EFI_INVALID_PARAMETER - Invalid variable name\r | |
313 | \r | |
314 | --*/\r | |
315 | {\r | |
316 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
317 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
318 | VARIABLE_HEADER *Variable;\r | |
319 | VARIABLE_HEADER *MaxIndex;\r | |
320 | VARIABLE_INDEX_TABLE *IndexTable;\r | |
321 | UINT32 Count;\r | |
322 | UINT8 *VariableBase;\r | |
323 | \r | |
324 | if (VariableName != 0 && VendorGuid == NULL) {\r | |
325 | return EFI_INVALID_PARAMETER;\r | |
326 | }\r | |
327 | //\r | |
328 | // No Variable Address equals zero, so 0 as initial value is safe.\r | |
329 | //\r | |
330 | MaxIndex = 0;\r | |
331 | \r | |
332 | GuidHob = GetFirstGuidHob (&mEfiVariableIndexTableGuid);\r | |
333 | if (GuidHob == NULL) {\r | |
334 | IndexTable = BuildGuidHob (&mEfiVariableIndexTableGuid, sizeof (VARIABLE_INDEX_TABLE));\r | |
335 | IndexTable->Length = 0;\r | |
336 | IndexTable->StartPtr = NULL;\r | |
337 | IndexTable->EndPtr = NULL;\r | |
338 | IndexTable->GoneThrough = 0;\r | |
339 | } else {\r | |
340 | IndexTable = GET_GUID_HOB_DATA (GuidHob);\r | |
341 | for (Count = 0; Count < IndexTable->Length; Count++)\r | |
342 | {\r | |
343 | MaxIndex = GetVariableByIndex (IndexTable, Count);\r | |
7ba905c9 | 344 | if (CompareWithValidVariable (MaxIndex, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r |
345 | PtrTrack->StartPtr = IndexTable->StartPtr;\r | |
346 | PtrTrack->EndPtr = IndexTable->EndPtr;\r | |
347 | \r | |
348 | return EFI_SUCCESS;\r | |
349 | }\r | |
350 | }\r | |
351 | \r | |
352 | if (IndexTable->GoneThrough) {\r | |
353 | return EFI_NOT_FOUND;\r | |
354 | }\r | |
355 | }\r | |
356 | //\r | |
357 | // If not found in HOB, then let's start from the MaxIndex we've found.\r | |
358 | //\r | |
359 | if (MaxIndex != NULL) {\r | |
360 | Variable = GetNextVariablePtr (MaxIndex);\r | |
361 | } else {\r | |
362 | if (IndexTable->StartPtr || IndexTable->EndPtr) {\r | |
363 | Variable = IndexTable->StartPtr;\r | |
364 | } else {\r | |
365 | VariableBase = (UINT8 *) (UINTN) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
366 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (VariableBase + \\r | |
367 | ((EFI_FIRMWARE_VOLUME_HEADER *) (VariableBase)) -> HeaderLength);\r | |
368 | \r | |
369 | if (GetVariableStoreStatus (VariableStoreHeader) != EfiValid) {\r | |
370 | return EFI_UNSUPPORTED;\r | |
371 | }\r | |
372 | \r | |
373 | if (~VariableStoreHeader->Size == 0) {\r | |
374 | return EFI_NOT_FOUND;\r | |
375 | }\r | |
376 | //\r | |
377 | // Find the variable by walk through non-volatile variable store\r | |
378 | //\r | |
379 | IndexTable->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader + 1);\r | |
380 | IndexTable->EndPtr = (VARIABLE_HEADER *) ((UINTN) VariableStoreHeader + VariableStoreHeader->Size);\r | |
381 | \r | |
382 | //\r | |
383 | // Start Pointers for the variable.\r | |
384 | // Actual Data Pointer where data can be written.\r | |
385 | //\r | |
386 | Variable = IndexTable->StartPtr;\r | |
387 | }\r | |
388 | }\r | |
389 | //\r | |
390 | // Find the variable by walk through non-volatile variable store\r | |
391 | //\r | |
392 | PtrTrack->StartPtr = IndexTable->StartPtr;\r | |
393 | PtrTrack->EndPtr = IndexTable->EndPtr;\r | |
394 | \r | |
395 | while (IsValidVariableHeader (Variable) && (Variable <= IndexTable->EndPtr)) {\r | |
396 | if (Variable->State == VAR_ADDED) {\r | |
397 | //\r | |
398 | // Record Variable in VariableIndex HOB\r | |
399 | //\r | |
400 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME)\r | |
401 | {\r | |
402 | VariableIndexTableUpdate (IndexTable, Variable);\r | |
403 | }\r | |
404 | \r | |
405 | if (CompareWithValidVariable (Variable, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r | |
406 | return EFI_SUCCESS;\r | |
407 | }\r | |
408 | }\r | |
409 | \r | |
410 | Variable = GetNextVariablePtr (Variable);\r | |
411 | }\r | |
412 | //\r | |
413 | // If gone through the VariableStore, that means we never find in Firmware any more.\r | |
414 | //\r | |
415 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME) {\r | |
416 | IndexTable->GoneThrough = 1;\r | |
417 | }\r | |
418 | \r | |
419 | PtrTrack->CurrPtr = NULL;\r | |
420 | \r | |
421 | return EFI_NOT_FOUND;\r | |
422 | }\r | |
423 | \r | |
424 | EFI_STATUS\r | |
425 | EFIAPI\r | |
426 | PeiGetVariable (\r | |
427 | IN EFI_PEI_SERVICES **PeiServices,\r | |
428 | IN CHAR16 *VariableName,\r | |
429 | IN EFI_GUID * VendorGuid,\r | |
430 | OUT UINT32 *Attributes OPTIONAL,\r | |
431 | IN OUT UINTN *DataSize,\r | |
432 | OUT VOID *Data\r | |
433 | )\r | |
434 | /*++\r | |
435 | \r | |
436 | Routine Description:\r | |
437 | \r | |
438 | Provide the read variable functionality of the variable services.\r | |
439 | \r | |
440 | Arguments:\r | |
441 | \r | |
442 | PeiServices - General purpose services available to every PEIM.\r | |
443 | \r | |
444 | VariableName - The variable name\r | |
445 | \r | |
446 | VendorGuid - The vendor's GUID\r | |
447 | \r | |
448 | Attributes - Pointer to the attribute\r | |
449 | \r | |
450 | DataSize - Size of data\r | |
451 | \r | |
452 | Data - Pointer to data\r | |
453 | \r | |
454 | Returns:\r | |
455 | \r | |
456 | EFI_SUCCESS - The interface could be successfully installed\r | |
457 | \r | |
458 | EFI_NOT_FOUND - The variable could not be discovered\r | |
459 | \r | |
460 | EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r | |
461 | \r | |
462 | --*/\r | |
463 | {\r | |
464 | VARIABLE_POINTER_TRACK Variable;\r | |
465 | UINTN VarDataSize;\r | |
466 | EFI_STATUS Status;\r | |
467 | \r | |
468 | if (VariableName == NULL || VendorGuid == NULL) {\r | |
469 | return EFI_INVALID_PARAMETER;\r | |
470 | }\r | |
471 | //\r | |
472 | // Find existing variable\r | |
473 | //\r | |
474 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r | |
475 | \r | |
476 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r | |
477 | return Status;\r | |
478 | }\r | |
479 | //\r | |
480 | // Get data size\r | |
481 | //\r | |
9cad030b | 482 | VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r |
7ba905c9 | 483 | if (*DataSize >= VarDataSize) {\r |
484 | (*PeiServices)->CopyMem (Data, GET_VARIABLE_DATA_PTR (Variable.CurrPtr), VarDataSize);\r | |
485 | \r | |
486 | if (Attributes != NULL) {\r | |
487 | *Attributes = Variable.CurrPtr->Attributes;\r | |
488 | }\r | |
489 | \r | |
490 | *DataSize = VarDataSize;\r | |
491 | return EFI_SUCCESS;\r | |
492 | } else {\r | |
493 | *DataSize = VarDataSize;\r | |
494 | return EFI_BUFFER_TOO_SMALL;\r | |
495 | }\r | |
496 | }\r | |
497 | \r | |
498 | \r | |
499 | EFI_STATUS\r | |
500 | EFIAPI\r | |
501 | PeiGetVariable2 (\r | |
502 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
503 | IN CONST CHAR16 *VariableName,\r | |
504 | IN CONST EFI_GUID *VariableGuid,\r | |
505 | OUT UINT32 *Attributes,\r | |
506 | IN OUT UINTN *DataSize,\r | |
507 | OUT VOID *Data\r | |
508 | )\r | |
509 | /*++\r | |
510 | \r | |
511 | Routine Description:\r | |
512 | \r | |
513 | Provide the read variable functionality of the variable services.\r | |
514 | \r | |
515 | Arguments:\r | |
516 | \r | |
517 | PeiServices - General purpose services available to every PEIM.\r | |
518 | \r | |
519 | VariableName - The variable name\r | |
520 | \r | |
521 | VendorGuid - The vendor's GUID\r | |
522 | \r | |
523 | Attributes - Pointer to the attribute\r | |
524 | \r | |
525 | DataSize - Size of data\r | |
526 | \r | |
527 | Data - Pointer to data\r | |
528 | \r | |
529 | Returns:\r | |
530 | \r | |
531 | EFI_SUCCESS - The interface could be successfully installed\r | |
532 | \r | |
533 | EFI_NOT_FOUND - The variable could not be discovered\r | |
534 | \r | |
535 | EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r | |
536 | \r | |
537 | --*/\r | |
538 | {\r | |
539 | return PeiGetVariable (\r | |
540 | GetPeiServicesTablePointer (),\r | |
541 | (CHAR16*)VariableName,\r | |
542 | (EFI_GUID*)VariableGuid,\r | |
543 | Attributes,\r | |
544 | DataSize,\r | |
545 | Data\r | |
546 | );\r | |
547 | }\r | |
548 | \r | |
549 | EFI_STATUS\r | |
550 | EFIAPI\r | |
551 | PeiGetNextVariableName (\r | |
552 | IN EFI_PEI_SERVICES **PeiServices,\r | |
553 | IN OUT UINTN *VariableNameSize,\r | |
554 | IN OUT CHAR16 *VariableName,\r | |
555 | IN OUT EFI_GUID *VendorGuid\r | |
556 | )\r | |
557 | /*++\r | |
558 | \r | |
559 | Routine Description:\r | |
560 | \r | |
561 | Provide the get next variable functionality of the variable services.\r | |
562 | \r | |
563 | Arguments:\r | |
564 | \r | |
565 | PeiServices - General purpose services available to every PEIM.\r | |
566 | VariabvleNameSize - The variable name's size.\r | |
567 | VariableName - A pointer to the variable's name.\r | |
568 | VendorGuid - A pointer to the EFI_GUID structure.\r | |
569 | \r | |
570 | VariableNameSize - Size of the variable name\r | |
571 | \r | |
572 | VariableName - The variable name\r | |
573 | \r | |
574 | VendorGuid - The vendor's GUID\r | |
575 | \r | |
576 | Returns:\r | |
577 | \r | |
578 | EFI_SUCCESS - The interface could be successfully installed\r | |
579 | \r | |
580 | EFI_NOT_FOUND - The variable could not be discovered\r | |
581 | \r | |
582 | --*/\r | |
583 | {\r | |
584 | VARIABLE_POINTER_TRACK Variable;\r | |
585 | UINTN VarNameSize;\r | |
586 | EFI_STATUS Status;\r | |
587 | \r | |
588 | if (VariableName == NULL) {\r | |
589 | return EFI_INVALID_PARAMETER;\r | |
590 | }\r | |
591 | \r | |
592 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r | |
593 | \r | |
594 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r | |
595 | return Status;\r | |
596 | }\r | |
597 | \r | |
598 | if (VariableName[0] != 0) {\r | |
599 | //\r | |
600 | // If variable name is not NULL, get next variable\r | |
601 | //\r | |
602 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
603 | }\r | |
604 | \r | |
605 | while (!(Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL)) {\r | |
606 | if (IsValidVariableHeader (Variable.CurrPtr)) {\r | |
607 | if (Variable.CurrPtr->State == VAR_ADDED) {\r | |
9cad030b | 608 | ASSERT (NameSizeOfVariable (Variable.CurrPtr) != 0);\r |
609 | \r | |
610 | VarNameSize = (UINTN) NameSizeOfVariable (Variable.CurrPtr);\r | |
7ba905c9 | 611 | if (VarNameSize <= *VariableNameSize) {\r |
612 | (*PeiServices)->CopyMem (VariableName, GET_VARIABLE_NAME_PTR (Variable.CurrPtr), VarNameSize);\r | |
613 | \r | |
614 | (*PeiServices)->CopyMem (VendorGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));\r | |
615 | \r | |
616 | Status = EFI_SUCCESS;\r | |
617 | } else {\r | |
618 | Status = EFI_BUFFER_TOO_SMALL;\r | |
619 | }\r | |
620 | \r | |
621 | *VariableNameSize = VarNameSize;\r | |
622 | return Status;\r | |
623 | //\r | |
624 | // Variable is found\r | |
625 | //\r | |
626 | } else {\r | |
627 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
628 | }\r | |
629 | } else {\r | |
630 | break;\r | |
631 | }\r | |
632 | }\r | |
633 | \r | |
634 | return EFI_NOT_FOUND;\r | |
635 | }\r | |
636 | \r | |
637 | EFI_STATUS\r | |
638 | EFIAPI\r | |
639 | PeiGetNextVariableName2 (\r | |
640 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r | |
641 | IN OUT UINTN *VariableNameSize,\r | |
642 | IN OUT CHAR16 *VariableName,\r | |
643 | IN OUT EFI_GUID *VariableGuid\r | |
644 | )\r | |
645 | /*++\r | |
646 | \r | |
647 | Routine Description:\r | |
648 | \r | |
649 | Provide the get next variable functionality of the variable services.\r | |
650 | \r | |
651 | Arguments:\r | |
652 | \r | |
653 | PeiServices - General purpose services available to every PEIM.\r | |
654 | VariabvleNameSize - The variable name's size.\r | |
655 | VariableName - A pointer to the variable's name.\r | |
656 | VariableGuid - A pointer to the EFI_GUID structure.\r | |
657 | \r | |
658 | VariableNameSize - Size of the variable name\r | |
659 | \r | |
660 | VariableName - The variable name\r | |
661 | \r | |
662 | VendorGuid - The vendor's GUID\r | |
663 | \r | |
664 | Returns:\r | |
665 | \r | |
666 | EFI_SUCCESS - The interface could be successfully installed\r | |
667 | \r | |
668 | EFI_NOT_FOUND - The variable could not be discovered\r | |
669 | \r | |
670 | --*/\r | |
671 | {\r | |
672 | return PeiGetNextVariableName (\r | |
673 | GetPeiServicesTablePointer (),\r | |
674 | VariableNameSize,\r | |
675 | VariableName,\r | |
676 | VariableGuid\r | |
677 | );\r | |
6bee1632 | 678 | }\r |