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 |
7ba905c9 |
83 | VARIABLE_HEADER *\r |
130e2569 |
84 | GetStartPointer (\r |
85 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r |
7ba905c9 |
86 | )\r |
87 | /*++\r |
88 | \r |
89 | Routine Description:\r |
90 | \r |
130e2569 |
91 | This code gets the pointer to the first variable memory pointer byte\r |
7ba905c9 |
92 | \r |
93 | Arguments:\r |
130e2569 |
94 | \r |
95 | VarStoreHeader Pointer to the Variable Store Header.\r |
7ba905c9 |
96 | \r |
97 | Returns:\r |
130e2569 |
98 | \r |
99 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r |
100 | \r |
101 | --*/\r |
102 | {\r |
103 | //\r |
104 | // The end of variable store\r |
105 | //\r |
106 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r |
107 | }\r |
108 | \r |
109 | VARIABLE_HEADER *\r |
110 | GetEndPointer (\r |
111 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r |
112 | )\r |
113 | /*++\r |
114 | \r |
115 | Routine Description:\r |
116 | \r |
117 | This code gets the pointer to the last variable memory pointer byte\r |
118 | \r |
119 | Arguments:\r |
120 | \r |
121 | VarStoreHeader Pointer to the Variable Store Header.\r |
122 | \r |
123 | Returns:\r |
124 | \r |
125 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r |
7ba905c9 |
126 | \r |
127 | --*/\r |
128 | {\r |
130e2569 |
129 | //\r |
130 | // The end of variable store\r |
131 | //\r |
132 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r |
7ba905c9 |
133 | }\r |
134 | \r |
135 | STATIC\r |
136 | BOOLEAN\r |
137 | EFIAPI\r |
138 | IsValidVariableHeader (\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 | if (Variable == NULL || Variable->StartId != VARIABLE_DATA ) {\r |
7ba905c9 |
157 | return FALSE;\r |
158 | }\r |
159 | \r |
160 | return TRUE;\r |
161 | }\r |
162 | \r |
130e2569 |
163 | \r |
164 | UINTN\r |
165 | NameSizeOfVariable (\r |
166 | IN VARIABLE_HEADER *Variable\r |
167 | )\r |
168 | /*++\r |
169 | \r |
170 | Routine Description:\r |
171 | \r |
172 | This code gets the size of name of variable.\r |
173 | \r |
174 | Arguments:\r |
175 | \r |
176 | Variable Pointer to the Variable Header.\r |
177 | \r |
178 | Returns:\r |
179 | \r |
180 | UINTN Size of variable in bytes\r |
181 | \r |
182 | --*/\r |
183 | {\r |
184 | if (Variable->State == (UINT8) (-1) ||\r |
185 | Variable->DataSize == (UINT32) -1 ||\r |
186 | Variable->NameSize == (UINT32) -1 ||\r |
187 | Variable->Attributes == (UINT32) -1) {\r |
188 | return 0;\r |
189 | }\r |
190 | return (UINTN) Variable->NameSize;\r |
191 | }\r |
192 | \r |
193 | UINTN\r |
194 | DataSizeOfVariable (\r |
195 | IN VARIABLE_HEADER *Variable\r |
196 | )\r |
197 | /*++\r |
198 | \r |
199 | Routine Description:\r |
200 | \r |
201 | This code gets the size of name of variable.\r |
202 | \r |
203 | Arguments:\r |
204 | \r |
205 | Variable Pointer to the Variable Header.\r |
206 | \r |
207 | Returns:\r |
208 | \r |
209 | UINTN Size of variable in bytes\r |
210 | \r |
211 | --*/\r |
212 | {\r |
213 | if (Variable->State == (UINT8) -1 ||\r |
214 | Variable->DataSize == (UINT32) -1 ||\r |
215 | Variable->NameSize == (UINT32) -1 ||\r |
216 | Variable->Attributes == (UINT32) -1) {\r |
217 | return 0;\r |
218 | }\r |
219 | return (UINTN) Variable->DataSize;\r |
220 | }\r |
221 | \r |
222 | CHAR16 *\r |
223 | GetVariableNamePtr (\r |
224 | IN VARIABLE_HEADER *Variable\r |
225 | )\r |
226 | /*++\r |
227 | \r |
228 | Routine Description:\r |
229 | \r |
230 | This code gets the pointer to the variable name.\r |
231 | \r |
232 | Arguments:\r |
233 | \r |
234 | Variable Pointer to the Variable Header.\r |
235 | \r |
236 | Returns:\r |
237 | \r |
238 | CHAR16* Pointer to Variable Name\r |
239 | \r |
240 | --*/\r |
241 | {\r |
242 | \r |
243 | return (CHAR16 *) (Variable + 1);\r |
244 | }\r |
245 | \r |
246 | \r |
247 | UINT8 *\r |
248 | GetVariableDataPtr (\r |
249 | IN VARIABLE_HEADER *Variable\r |
250 | )\r |
251 | /*++\r |
252 | \r |
253 | Routine Description:\r |
254 | \r |
255 | This code gets the pointer to the variable data.\r |
256 | \r |
257 | Arguments:\r |
258 | \r |
259 | Variable Pointer to the Variable Header.\r |
260 | \r |
261 | Returns:\r |
262 | \r |
263 | UINT8* Pointer to Variable Data\r |
264 | \r |
265 | --*/\r |
266 | {\r |
267 | UINTN Value;\r |
268 | \r |
269 | //\r |
270 | // Be careful about pad size for alignment\r |
271 | //\r |
272 | Value = (UINTN) GetVariableNamePtr (Variable);\r |
273 | Value += NameSizeOfVariable (Variable);\r |
274 | Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r |
275 | \r |
276 | return (UINT8 *) Value;\r |
277 | }\r |
278 | \r |
279 | VARIABLE_HEADER *\r |
280 | GetNextVariablePtr (\r |
281 | IN VARIABLE_HEADER *Variable\r |
282 | )\r |
283 | /*++\r |
284 | \r |
285 | Routine Description:\r |
286 | \r |
287 | This code gets the pointer to the next variable header.\r |
288 | \r |
289 | Arguments:\r |
290 | \r |
291 | Variable Pointer to the Variable Header.\r |
292 | \r |
293 | Returns:\r |
294 | \r |
295 | VARIABLE_HEADER* Pointer to next variable header.\r |
296 | \r |
297 | --*/\r |
298 | {\r |
299 | UINTN Value;\r |
300 | \r |
301 | if (!IsValidVariableHeader (Variable)) {\r |
302 | return NULL;\r |
303 | }\r |
304 | \r |
305 | Value = (UINTN) GetVariableDataPtr (Variable);\r |
306 | Value += DataSizeOfVariable (Variable);\r |
307 | Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r |
308 | \r |
309 | //\r |
310 | // Be careful about pad size for alignment\r |
311 | //\r |
312 | return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r |
313 | }\r |
314 | \r |
315 | \r |
7ba905c9 |
316 | STATIC\r |
317 | VARIABLE_STORE_STATUS\r |
318 | EFIAPI\r |
319 | GetVariableStoreStatus (\r |
320 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r |
321 | )\r |
322 | /*++\r |
323 | \r |
324 | Routine Description:\r |
325 | \r |
326 | This code gets the pointer to the variable name.\r |
327 | \r |
328 | Arguments:\r |
329 | \r |
330 | VarStoreHeader Pointer to the Variable Store Header.\r |
331 | \r |
332 | Returns:\r |
333 | \r |
334 | EfiRaw Variable store is raw\r |
335 | EfiValid Variable store is valid\r |
336 | EfiInvalid Variable store is invalid\r |
337 | \r |
338 | --*/\r |
339 | {\r |
340 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r |
341 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r |
342 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r |
343 | ) {\r |
344 | \r |
345 | return EfiValid;\r |
346 | }\r |
347 | \r |
348 | if (VarStoreHeader->Signature == 0xffffffff &&\r |
349 | VarStoreHeader->Size == 0xffffffff &&\r |
350 | VarStoreHeader->Format == 0xff &&\r |
351 | VarStoreHeader->State == 0xff\r |
352 | ) {\r |
353 | \r |
354 | return EfiRaw;\r |
355 | } else {\r |
356 | return EfiInvalid;\r |
357 | }\r |
358 | }\r |
359 | \r |
360 | STATIC\r |
361 | EFI_STATUS\r |
362 | CompareWithValidVariable (\r |
363 | IN VARIABLE_HEADER *Variable,\r |
364 | IN CONST CHAR16 *VariableName,\r |
365 | IN CONST EFI_GUID *VendorGuid,\r |
366 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r |
367 | )\r |
368 | /*++\r |
369 | \r |
370 | Routine Description:\r |
371 | \r |
372 | This function compares a variable with variable entries in database\r |
373 | \r |
374 | Arguments:\r |
375 | \r |
376 | Variable - Pointer to the variable in our database\r |
377 | VariableName - Name of the variable to compare to 'Variable'\r |
378 | VendorGuid - GUID of the variable to compare to 'Variable'\r |
379 | PtrTrack - Variable Track Pointer structure that contains\r |
380 | Variable Information.\r |
381 | \r |
382 | Returns:\r |
383 | \r |
384 | EFI_SUCCESS - Found match variable\r |
385 | EFI_NOT_FOUND - Variable not found\r |
386 | \r |
387 | --*/\r |
388 | {\r |
130e2569 |
389 | VOID *Point;\r |
390 | \r |
7ba905c9 |
391 | if (VariableName[0] == 0) {\r |
392 | PtrTrack->CurrPtr = Variable;\r |
393 | return EFI_SUCCESS;\r |
394 | } else {\r |
395 | //\r |
396 | // Don't use CompareGuid function here for performance reasons.\r |
397 | // Instead we compare the GUID a UINT32 at a time and branch\r |
398 | // on the first failed comparison.\r |
399 | //\r |
400 | if ((((INT32 *) VendorGuid)[0] == ((INT32 *) &Variable->VendorGuid)[0]) &&\r |
401 | (((INT32 *) VendorGuid)[1] == ((INT32 *) &Variable->VendorGuid)[1]) &&\r |
402 | (((INT32 *) VendorGuid)[2] == ((INT32 *) &Variable->VendorGuid)[2]) &&\r |
403 | (((INT32 *) VendorGuid)[3] == ((INT32 *) &Variable->VendorGuid)[3])\r |
404 | ) {\r |
130e2569 |
405 | ASSERT (NameSizeOfVariable (Variable) != 0);\r |
406 | Point = (VOID *) GetVariableNamePtr (Variable);\r |
407 | if (!CompareMem (VariableName, Point, NameSizeOfVariable (Variable))) {\r |
7ba905c9 |
408 | PtrTrack->CurrPtr = Variable;\r |
409 | return EFI_SUCCESS;\r |
410 | }\r |
411 | }\r |
412 | }\r |
413 | \r |
414 | return EFI_NOT_FOUND;\r |
415 | }\r |
416 | \r |
417 | STATIC\r |
418 | EFI_STATUS\r |
419 | EFIAPI\r |
420 | FindVariable (\r |
421 | IN EFI_PEI_SERVICES **PeiServices,\r |
422 | IN CONST CHAR16 *VariableName,\r |
423 | IN CONST EFI_GUID *VendorGuid,\r |
424 | OUT VARIABLE_POINTER_TRACK *PtrTrack\r |
425 | )\r |
426 | /*++\r |
427 | \r |
428 | Routine Description:\r |
429 | \r |
430 | This code finds variable in storage blocks (Non-Volatile)\r |
431 | \r |
432 | Arguments:\r |
433 | \r |
434 | PeiServices - General purpose services available to every PEIM.\r |
435 | VariableName - Name of the variable to be found\r |
436 | VendorGuid - Vendor GUID to be found.\r |
437 | PtrTrack - Variable Track Pointer structure that contains\r |
438 | Variable Information.\r |
439 | \r |
440 | Returns:\r |
441 | \r |
442 | EFI_SUCCESS - Variable found successfully\r |
443 | EFI_NOT_FOUND - Variable not found\r |
444 | EFI_INVALID_PARAMETER - Invalid variable name\r |
445 | \r |
446 | --*/\r |
447 | {\r |
448 | EFI_HOB_GUID_TYPE *GuidHob;\r |
449 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r |
450 | VARIABLE_HEADER *Variable;\r |
451 | VARIABLE_HEADER *MaxIndex;\r |
452 | VARIABLE_INDEX_TABLE *IndexTable;\r |
453 | UINT32 Count;\r |
454 | UINT8 *VariableBase;\r |
455 | \r |
456 | if (VariableName != 0 && VendorGuid == NULL) {\r |
457 | return EFI_INVALID_PARAMETER;\r |
458 | }\r |
459 | //\r |
460 | // No Variable Address equals zero, so 0 as initial value is safe.\r |
461 | //\r |
462 | MaxIndex = 0;\r |
463 | \r |
464 | GuidHob = GetFirstGuidHob (&mEfiVariableIndexTableGuid);\r |
465 | if (GuidHob == NULL) {\r |
466 | IndexTable = BuildGuidHob (&mEfiVariableIndexTableGuid, sizeof (VARIABLE_INDEX_TABLE));\r |
467 | IndexTable->Length = 0;\r |
468 | IndexTable->StartPtr = NULL;\r |
469 | IndexTable->EndPtr = NULL;\r |
470 | IndexTable->GoneThrough = 0;\r |
471 | } else {\r |
472 | IndexTable = GET_GUID_HOB_DATA (GuidHob);\r |
473 | for (Count = 0; Count < IndexTable->Length; Count++)\r |
474 | {\r |
475 | MaxIndex = GetVariableByIndex (IndexTable, Count);\r |
130e2569 |
476 | \r |
7ba905c9 |
477 | if (CompareWithValidVariable (MaxIndex, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r |
478 | PtrTrack->StartPtr = IndexTable->StartPtr;\r |
479 | PtrTrack->EndPtr = IndexTable->EndPtr;\r |
480 | \r |
481 | return EFI_SUCCESS;\r |
482 | }\r |
483 | }\r |
484 | \r |
485 | if (IndexTable->GoneThrough) {\r |
486 | return EFI_NOT_FOUND;\r |
487 | }\r |
488 | }\r |
489 | //\r |
490 | // If not found in HOB, then let's start from the MaxIndex we've found.\r |
491 | //\r |
492 | if (MaxIndex != NULL) {\r |
493 | Variable = GetNextVariablePtr (MaxIndex);\r |
494 | } else {\r |
495 | if (IndexTable->StartPtr || IndexTable->EndPtr) {\r |
496 | Variable = IndexTable->StartPtr;\r |
497 | } else {\r |
498 | VariableBase = (UINT8 *) (UINTN) PcdGet32 (PcdFlashNvStorageVariableBase);\r |
499 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (VariableBase + \\r |
500 | ((EFI_FIRMWARE_VOLUME_HEADER *) (VariableBase)) -> HeaderLength);\r |
501 | \r |
502 | if (GetVariableStoreStatus (VariableStoreHeader) != EfiValid) {\r |
503 | return EFI_UNSUPPORTED;\r |
504 | }\r |
505 | \r |
506 | if (~VariableStoreHeader->Size == 0) {\r |
507 | return EFI_NOT_FOUND;\r |
508 | }\r |
509 | //\r |
510 | // Find the variable by walk through non-volatile variable store\r |
511 | //\r |
130e2569 |
512 | IndexTable->StartPtr = GetStartPointer (VariableStoreHeader);\r |
513 | IndexTable->EndPtr = GetEndPointer (VariableStoreHeader);\r |
7ba905c9 |
514 | \r |
515 | //\r |
516 | // Start Pointers for the variable.\r |
517 | // Actual Data Pointer where data can be written.\r |
518 | //\r |
519 | Variable = IndexTable->StartPtr;\r |
520 | }\r |
521 | }\r |
522 | //\r |
523 | // Find the variable by walk through non-volatile variable store\r |
524 | //\r |
525 | PtrTrack->StartPtr = IndexTable->StartPtr;\r |
526 | PtrTrack->EndPtr = IndexTable->EndPtr;\r |
527 | \r |
528 | while (IsValidVariableHeader (Variable) && (Variable <= IndexTable->EndPtr)) {\r |
529 | if (Variable->State == VAR_ADDED) {\r |
530 | //\r |
531 | // Record Variable in VariableIndex HOB\r |
532 | //\r |
533 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME)\r |
534 | {\r |
535 | VariableIndexTableUpdate (IndexTable, Variable);\r |
536 | }\r |
537 | \r |
538 | if (CompareWithValidVariable (Variable, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {\r |
539 | return EFI_SUCCESS;\r |
540 | }\r |
541 | }\r |
542 | \r |
543 | Variable = GetNextVariablePtr (Variable);\r |
544 | }\r |
545 | //\r |
546 | // If gone through the VariableStore, that means we never find in Firmware any more.\r |
547 | //\r |
548 | if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME) {\r |
549 | IndexTable->GoneThrough = 1;\r |
550 | }\r |
551 | \r |
552 | PtrTrack->CurrPtr = NULL;\r |
553 | \r |
554 | return EFI_NOT_FOUND;\r |
555 | }\r |
556 | \r |
557 | EFI_STATUS\r |
558 | EFIAPI\r |
559 | PeiGetVariable (\r |
560 | IN EFI_PEI_SERVICES **PeiServices,\r |
561 | IN CHAR16 *VariableName,\r |
562 | IN EFI_GUID * VendorGuid,\r |
563 | OUT UINT32 *Attributes OPTIONAL,\r |
564 | IN OUT UINTN *DataSize,\r |
565 | OUT VOID *Data\r |
566 | )\r |
567 | /*++\r |
568 | \r |
569 | Routine Description:\r |
570 | \r |
571 | Provide the read variable functionality of the variable services.\r |
572 | \r |
573 | Arguments:\r |
574 | \r |
575 | PeiServices - General purpose services available to every PEIM.\r |
576 | \r |
577 | VariableName - The variable name\r |
578 | \r |
579 | VendorGuid - The vendor's GUID\r |
580 | \r |
581 | Attributes - Pointer to the attribute\r |
582 | \r |
583 | DataSize - Size of data\r |
584 | \r |
585 | Data - Pointer to data\r |
586 | \r |
587 | Returns:\r |
588 | \r |
589 | EFI_SUCCESS - The interface could be successfully installed\r |
590 | \r |
591 | EFI_NOT_FOUND - The variable could not be discovered\r |
592 | \r |
593 | EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r |
594 | \r |
595 | --*/\r |
596 | {\r |
597 | VARIABLE_POINTER_TRACK Variable;\r |
598 | UINTN VarDataSize;\r |
599 | EFI_STATUS Status;\r |
600 | \r |
601 | if (VariableName == NULL || VendorGuid == NULL) {\r |
602 | return EFI_INVALID_PARAMETER;\r |
603 | }\r |
604 | //\r |
605 | // Find existing variable\r |
606 | //\r |
607 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r |
608 | \r |
609 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r |
610 | return Status;\r |
611 | }\r |
612 | //\r |
613 | // Get data size\r |
614 | //\r |
130e2569 |
615 | VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r |
7ba905c9 |
616 | if (*DataSize >= VarDataSize) {\r |
130e2569 |
617 | (*PeiServices)->CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r |
7ba905c9 |
618 | \r |
619 | if (Attributes != NULL) {\r |
620 | *Attributes = Variable.CurrPtr->Attributes;\r |
621 | }\r |
622 | \r |
623 | *DataSize = VarDataSize;\r |
624 | return EFI_SUCCESS;\r |
625 | } else {\r |
626 | *DataSize = VarDataSize;\r |
627 | return EFI_BUFFER_TOO_SMALL;\r |
628 | }\r |
629 | }\r |
630 | \r |
631 | \r |
632 | EFI_STATUS\r |
633 | EFIAPI\r |
634 | PeiGetVariable2 (\r |
635 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r |
636 | IN CONST CHAR16 *VariableName,\r |
637 | IN CONST EFI_GUID *VariableGuid,\r |
638 | OUT UINT32 *Attributes,\r |
639 | IN OUT UINTN *DataSize,\r |
640 | OUT VOID *Data\r |
641 | )\r |
642 | /*++\r |
643 | \r |
644 | Routine Description:\r |
645 | \r |
646 | Provide the read variable functionality of the variable services.\r |
647 | \r |
648 | Arguments:\r |
649 | \r |
650 | PeiServices - General purpose services available to every PEIM.\r |
651 | \r |
652 | VariableName - The variable name\r |
653 | \r |
654 | VendorGuid - The vendor's GUID\r |
655 | \r |
656 | Attributes - Pointer to the attribute\r |
657 | \r |
658 | DataSize - Size of data\r |
659 | \r |
660 | Data - Pointer to data\r |
661 | \r |
662 | Returns:\r |
663 | \r |
664 | EFI_SUCCESS - The interface could be successfully installed\r |
665 | \r |
666 | EFI_NOT_FOUND - The variable could not be discovered\r |
667 | \r |
668 | EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r |
669 | \r |
670 | --*/\r |
671 | {\r |
672 | return PeiGetVariable (\r |
673 | GetPeiServicesTablePointer (),\r |
674 | (CHAR16*)VariableName,\r |
675 | (EFI_GUID*)VariableGuid,\r |
676 | Attributes,\r |
677 | DataSize,\r |
678 | Data\r |
679 | );\r |
680 | }\r |
681 | \r |
682 | EFI_STATUS\r |
683 | EFIAPI\r |
684 | PeiGetNextVariableName (\r |
685 | IN EFI_PEI_SERVICES **PeiServices,\r |
686 | IN OUT UINTN *VariableNameSize,\r |
687 | IN OUT CHAR16 *VariableName,\r |
688 | IN OUT EFI_GUID *VendorGuid\r |
689 | )\r |
690 | /*++\r |
691 | \r |
692 | Routine Description:\r |
693 | \r |
694 | Provide the get next variable functionality of the variable services.\r |
695 | \r |
696 | Arguments:\r |
697 | \r |
698 | PeiServices - General purpose services available to every PEIM.\r |
699 | VariabvleNameSize - The variable name's size.\r |
700 | VariableName - A pointer to the variable's name.\r |
701 | VendorGuid - A pointer to the EFI_GUID structure.\r |
702 | \r |
703 | VariableNameSize - Size of the variable name\r |
704 | \r |
705 | VariableName - The variable name\r |
706 | \r |
707 | VendorGuid - The vendor's GUID\r |
708 | \r |
709 | Returns:\r |
710 | \r |
711 | EFI_SUCCESS - The interface could be successfully installed\r |
712 | \r |
713 | EFI_NOT_FOUND - The variable could not be discovered\r |
714 | \r |
715 | --*/\r |
716 | {\r |
717 | VARIABLE_POINTER_TRACK Variable;\r |
718 | UINTN VarNameSize;\r |
719 | EFI_STATUS Status;\r |
720 | \r |
721 | if (VariableName == NULL) {\r |
722 | return EFI_INVALID_PARAMETER;\r |
723 | }\r |
724 | \r |
725 | Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);\r |
726 | \r |
727 | if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {\r |
728 | return Status;\r |
729 | }\r |
730 | \r |
731 | if (VariableName[0] != 0) {\r |
732 | //\r |
733 | // If variable name is not NULL, get next variable\r |
734 | //\r |
735 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r |
736 | }\r |
737 | \r |
738 | while (!(Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL)) {\r |
739 | if (IsValidVariableHeader (Variable.CurrPtr)) {\r |
740 | if (Variable.CurrPtr->State == VAR_ADDED) {\r |
130e2569 |
741 | ASSERT (NameSizeOfVariable (Variable.CurrPtr) != 0);\r |
9cad030b |
742 | \r |
130e2569 |
743 | VarNameSize = (UINTN) NameSizeOfVariable (Variable.CurrPtr);\r |
7ba905c9 |
744 | if (VarNameSize <= *VariableNameSize) {\r |
130e2569 |
745 | (*PeiServices)->CopyMem (VariableName, GetVariableNamePtr (Variable.CurrPtr), VarNameSize);\r |
7ba905c9 |
746 | \r |
747 | (*PeiServices)->CopyMem (VendorGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));\r |
748 | \r |
749 | Status = EFI_SUCCESS;\r |
750 | } else {\r |
751 | Status = EFI_BUFFER_TOO_SMALL;\r |
752 | }\r |
753 | \r |
754 | *VariableNameSize = VarNameSize;\r |
755 | return Status;\r |
756 | //\r |
757 | // Variable is found\r |
758 | //\r |
759 | } else {\r |
760 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r |
761 | }\r |
762 | } else {\r |
763 | break;\r |
764 | }\r |
765 | }\r |
766 | \r |
767 | return EFI_NOT_FOUND;\r |
768 | }\r |
769 | \r |
770 | EFI_STATUS\r |
771 | EFIAPI\r |
772 | PeiGetNextVariableName2 (\r |
773 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r |
774 | IN OUT UINTN *VariableNameSize,\r |
775 | IN OUT CHAR16 *VariableName,\r |
776 | IN OUT EFI_GUID *VariableGuid\r |
777 | )\r |
778 | /*++\r |
779 | \r |
780 | Routine Description:\r |
781 | \r |
782 | Provide the get next variable functionality of the variable services.\r |
783 | \r |
784 | Arguments:\r |
785 | \r |
786 | PeiServices - General purpose services available to every PEIM.\r |
787 | VariabvleNameSize - The variable name's size.\r |
788 | VariableName - A pointer to the variable's name.\r |
789 | VariableGuid - A pointer to the EFI_GUID structure.\r |
790 | \r |
791 | VariableNameSize - Size of the variable name\r |
792 | \r |
793 | VariableName - The variable name\r |
794 | \r |
795 | VendorGuid - The vendor's GUID\r |
796 | \r |
797 | Returns:\r |
798 | \r |
799 | EFI_SUCCESS - The interface could be successfully installed\r |
800 | \r |
801 | EFI_NOT_FOUND - The variable could not be discovered\r |
802 | \r |
803 | --*/\r |
804 | {\r |
805 | return PeiGetNextVariableName (\r |
806 | GetPeiServicesTablePointer (),\r |
807 | VariableNameSize,\r |
808 | VariableName,\r |
809 | VariableGuid\r |
810 | );\r |
6bee1632 |
811 | }\r |