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052ad7e1 A |
1 | /** @file\r |
2 | EFI Runtime Variable services.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2007, Intel Corporation \r | |
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 | |
8d3a5c82 | 9 | \r |
052ad7e1 A |
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 | |
8d3a5c82 | 12 | \r |
052ad7e1 | 13 | **/\r |
8d3a5c82 | 14 | \r |
15 | \r | |
16 | #include "Variable.h"\r | |
33a5a666 A |
17 | \r |
18 | \r | |
052ad7e1 A |
19 | VARIABLE_MODULE_GLOBAL mRuntimeData;\r |
20 | VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal = &mRuntimeData;\r | |
21 | EFI_EVENT mVirtualAddressChangeEvent = NULL;\r | |
22 | EFI_HANDLE mHandle = NULL;\r | |
8d3a5c82 | 23 | \r |
33a5a666 | 24 | \r |
8d3a5c82 | 25 | //\r |
26 | // This is a temperary function which will be removed\r | |
27 | // when EfiAcquireLock in UefiLib can handle the\r | |
28 | // the call in UEFI Runtimer driver in RT phase.\r | |
29 | //\r | |
8d3a5c82 | 30 | VOID\r |
31 | AcquireLockOnlyAtBootTime (\r | |
32 | IN EFI_LOCK *Lock\r | |
33 | )\r | |
34 | {\r | |
35 | if (!EfiAtRuntime ()) {\r | |
36 | EfiAcquireLock (Lock);\r | |
37 | }\r | |
38 | }\r | |
39 | \r | |
40 | //\r | |
41 | // This is a temperary function which will be removed\r | |
42 | // when EfiAcquireLock in UefiLib can handle the\r | |
43 | // the call in UEFI Runtimer driver in RT phase.\r | |
44 | //\r | |
8d3a5c82 | 45 | VOID\r |
46 | ReleaseLockOnlyAtBootTime (\r | |
47 | IN EFI_LOCK *Lock\r | |
48 | )\r | |
49 | {\r | |
50 | if (!EfiAtRuntime ()) {\r | |
51 | EfiReleaseLock (Lock);\r | |
52 | }\r | |
53 | }\r | |
54 | \r | |
33a5a666 A |
55 | \r |
56 | GLOBAL_REMOVE_IF_UNREFERENCED VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r | |
57 | \r | |
58 | \r | |
052ad7e1 A |
59 | /**\r |
60 | Routine used to track statistical information about variable usage. \r | |
61 | The data is stored in the EFI system table so it can be accessed later.\r | |
62 | VariableInfo.efi can dump out the table. Only Boot Services variable \r | |
63 | accesses are tracked by this code. The PcdVariableCollectStatistics\r | |
64 | build flag controls if this feature is enabled. \r | |
65 | \r | |
66 | A read that hits in the cache will have Read and Cache true for \r | |
67 | the transaction. Data is allocated by this routine, but never\r | |
68 | freed.\r | |
69 | \r | |
70 | @param[in] VariableName Name of the Variable to track\r | |
71 | @param[in] VendorGuid Guid of the Variable to track\r | |
72 | @param[in] Volatile TRUE if volatile FALSE if non-volatile\r | |
73 | @param[in] Read TRUE if GetVariable() was called\r | |
74 | @param[in] Write TRUE if SetVariable() was called\r | |
75 | @param[in] Delete TRUE if deleted via SetVariable()\r | |
76 | @param[in] Cache TRUE for a cache hit.\r | |
77 | \r | |
78 | **/\r | |
33a5a666 A |
79 | VOID\r |
80 | UpdateVariableInfo (\r | |
81 | IN CHAR16 *VariableName,\r | |
82 | IN EFI_GUID *VendorGuid,\r | |
83 | IN BOOLEAN Volatile,\r | |
84 | IN BOOLEAN Read,\r | |
85 | IN BOOLEAN Write,\r | |
86 | IN BOOLEAN Delete,\r | |
87 | IN BOOLEAN Cache\r | |
88 | )\r | |
89 | {\r | |
90 | VARIABLE_INFO_ENTRY *Entry;\r | |
91 | \r | |
92 | if (FeaturePcdGet (PcdVariableCollectStatistics)) {\r | |
93 | \r | |
94 | if (EfiAtRuntime ()) {\r | |
95 | // Don't collect statistics at runtime\r | |
96 | return;\r | |
97 | }\r | |
98 | \r | |
99 | if (gVariableInfo == NULL) {\r | |
052ad7e1 A |
100 | //\r |
101 | // on the first call allocate a entry and place a pointer to it in\r | |
102 | // the EFI System Table\r | |
103 | //\r | |
33a5a666 | 104 | gVariableInfo = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r |
052ad7e1 A |
105 | ASSERT (gVariableInfo != NULL);\r |
106 | \r | |
33a5a666 A |
107 | CopyGuid (&gVariableInfo->VendorGuid, VendorGuid);\r |
108 | gVariableInfo->Name = AllocatePool (StrLen (VariableName));\r | |
109 | StrCpy (gVariableInfo->Name, VariableName);\r | |
110 | gVariableInfo->Volatile = Volatile;\r | |
111 | \r | |
112 | gBS->InstallConfigurationTable (&gEfiVariableInfoGuid, gVariableInfo);\r | |
113 | }\r | |
114 | \r | |
115 | \r | |
116 | for (Entry = gVariableInfo; Entry != NULL; Entry = Entry->Next) {\r | |
117 | if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {\r | |
118 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
119 | if (Read) {\r | |
120 | Entry->ReadCount++;\r | |
121 | }\r | |
122 | if (Write) {\r | |
123 | Entry->WriteCount++;\r | |
124 | }\r | |
125 | if (Delete) {\r | |
126 | Entry->DeleteCount++;\r | |
127 | }\r | |
128 | if (Cache) {\r | |
129 | Entry->CacheCount++;\r | |
130 | }\r | |
131 | \r | |
132 | return;\r | |
133 | }\r | |
134 | }\r | |
135 | \r | |
136 | if (Entry->Next == NULL) {\r | |
052ad7e1 A |
137 | //\r |
138 | // If the entry is not in the table add it.\r | |
139 | // Next iteration of the loop will fill in the data\r | |
140 | //\r | |
33a5a666 | 141 | Entry->Next = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r |
052ad7e1 | 142 | ASSERT (Entry->Next != NULL);\r |
33a5a666 A |
143 | \r |
144 | CopyGuid (&Entry->Next->VendorGuid, VendorGuid);\r | |
145 | Entry->Next->Name = AllocatePool (StrLen (VariableName));\r | |
146 | StrCpy (Entry->Next->Name, VariableName);\r | |
147 | Entry->Next->Volatile = Volatile;\r | |
148 | }\r | |
149 | \r | |
150 | }\r | |
151 | }\r | |
152 | }\r | |
153 | \r | |
154 | \r | |
8d3a5c82 | 155 | BOOLEAN\r |
8d3a5c82 | 156 | IsValidVariableHeader (\r |
157 | IN VARIABLE_HEADER *Variable\r | |
158 | )\r | |
159 | /*++\r | |
160 | \r | |
161 | Routine Description:\r | |
162 | \r | |
163 | This code checks if variable header is valid or not.\r | |
164 | \r | |
165 | Arguments:\r | |
166 | Variable Pointer to the Variable Header.\r | |
167 | \r | |
168 | Returns:\r | |
169 | TRUE Variable header is valid.\r | |
170 | FALSE Variable header is not valid.\r | |
171 | \r | |
172 | --*/\r | |
173 | {\r | |
fdb7765f | 174 | if (Variable == NULL || Variable->StartId != VARIABLE_DATA) {\r |
8d3a5c82 | 175 | return FALSE;\r |
176 | }\r | |
177 | \r | |
178 | return TRUE;\r | |
179 | }\r | |
180 | \r | |
052ad7e1 | 181 | \r |
8d3a5c82 | 182 | EFI_STATUS\r |
8d3a5c82 | 183 | UpdateVariableStore (\r |
184 | IN VARIABLE_GLOBAL *Global,\r | |
185 | IN BOOLEAN Volatile,\r | |
186 | IN BOOLEAN SetByIndex,\r | |
187 | IN UINTN Instance,\r | |
188 | IN UINTN DataPtrIndex,\r | |
189 | IN UINT32 DataSize,\r | |
190 | IN UINT8 *Buffer\r | |
191 | )\r | |
192 | /*++\r | |
193 | \r | |
194 | Routine Description:\r | |
195 | \r | |
196 | This function writes data to the FWH at the correct LBA even if the LBAs\r | |
197 | are fragmented.\r | |
198 | \r | |
199 | Arguments:\r | |
200 | \r | |
c6492839 | 201 | Global - Pointer to VARAIBLE_GLOBAL structure\r |
202 | Volatile - If the Variable is Volatile or Non-Volatile\r | |
203 | SetByIndex - TRUE: Target pointer is given as index\r | |
204 | FALSE: Target pointer is absolute\r | |
205 | Instance - Instance of FV Block services\r | |
206 | DataPtrIndex - Pointer to the Data from the end of VARIABLE_STORE_HEADER\r | |
207 | structure\r | |
208 | DataSize - Size of data to be written.\r | |
209 | Buffer - Pointer to the buffer from which data is written\r | |
8d3a5c82 | 210 | \r |
211 | Returns:\r | |
212 | \r | |
c6492839 | 213 | EFI_INVALID_PARAMETER - Parameters not valid\r |
214 | EFI_SUCCESS - Variable store successfully updated\r | |
8d3a5c82 | 215 | \r |
216 | --*/\r | |
217 | {\r | |
218 | EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;\r | |
219 | UINTN BlockIndex2;\r | |
220 | UINTN LinearOffset;\r | |
221 | UINTN CurrWriteSize;\r | |
222 | UINTN CurrWritePtr;\r | |
223 | UINT8 *CurrBuffer;\r | |
224 | EFI_LBA LbaNumber;\r | |
225 | UINTN Size;\r | |
226 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
227 | VARIABLE_STORE_HEADER *VolatileBase;\r | |
228 | EFI_PHYSICAL_ADDRESS FvVolHdr;\r | |
229 | EFI_PHYSICAL_ADDRESS DataPtr;\r | |
230 | EFI_STATUS Status;\r | |
231 | \r | |
232 | FwVolHeader = NULL;\r | |
233 | DataPtr = DataPtrIndex;\r | |
234 | \r | |
235 | //\r | |
236 | // Check if the Data is Volatile\r | |
237 | //\r | |
238 | if (!Volatile) {\r | |
239 | EfiFvbGetPhysicalAddress (Instance, &FvVolHdr);\r | |
240 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r | |
241 | //\r | |
242 | // Data Pointer should point to the actual Address where data is to be\r | |
243 | // written\r | |
244 | //\r | |
245 | if (SetByIndex) {\r | |
052ad7e1 | 246 | DataPtr += mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;\r |
8d3a5c82 | 247 | }\r |
248 | \r | |
249 | if ((DataPtr + DataSize) >= ((EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) FwVolHeader + FwVolHeader->FvLength))) {\r | |
250 | return EFI_INVALID_PARAMETER;\r | |
251 | }\r | |
252 | } else {\r | |
253 | //\r | |
254 | // Data Pointer should point to the actual Address where data is to be\r | |
255 | // written\r | |
256 | //\r | |
052ad7e1 | 257 | VolatileBase = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
8d3a5c82 | 258 | if (SetByIndex) {\r |
052ad7e1 | 259 | DataPtr += mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r |
8d3a5c82 | 260 | }\r |
261 | \r | |
262 | if ((DataPtr + DataSize) >= ((UINTN) ((UINT8 *) VolatileBase + VolatileBase->Size))) {\r | |
263 | return EFI_INVALID_PARAMETER;\r | |
264 | }\r | |
c6492839 | 265 | \r |
266 | //\r | |
267 | // If Volatile Variable just do a simple mem copy.\r | |
268 | // \r | |
269 | CopyMem ((UINT8 *)(UINTN)DataPtr, Buffer, DataSize);\r | |
8d3a5c82 | 270 | return EFI_SUCCESS;\r |
271 | }\r | |
c6492839 | 272 | \r |
8d3a5c82 | 273 | //\r |
274 | // If we are here we are dealing with Non-Volatile Variables\r | |
275 | //\r | |
276 | LinearOffset = (UINTN) FwVolHeader;\r | |
277 | CurrWritePtr = (UINTN) DataPtr;\r | |
278 | CurrWriteSize = DataSize;\r | |
279 | CurrBuffer = Buffer;\r | |
280 | LbaNumber = 0;\r | |
281 | \r | |
282 | if (CurrWritePtr < LinearOffset) {\r | |
283 | return EFI_INVALID_PARAMETER;\r | |
284 | }\r | |
285 | \r | |
286 | for (PtrBlockMapEntry = FwVolHeader->BlockMap; PtrBlockMapEntry->NumBlocks != 0; PtrBlockMapEntry++) {\r | |
287 | for (BlockIndex2 = 0; BlockIndex2 < PtrBlockMapEntry->NumBlocks; BlockIndex2++) {\r | |
288 | //\r | |
289 | // Check to see if the Variable Writes are spanning through multiple\r | |
290 | // blocks.\r | |
291 | //\r | |
292 | if ((CurrWritePtr >= LinearOffset) && (CurrWritePtr < LinearOffset + PtrBlockMapEntry->Length)) {\r | |
293 | if ((CurrWritePtr + CurrWriteSize) <= (LinearOffset + PtrBlockMapEntry->Length)) {\r | |
294 | Status = EfiFvbWriteBlock (\r | |
295 | Instance,\r | |
296 | LbaNumber,\r | |
297 | (UINTN) (CurrWritePtr - LinearOffset),\r | |
298 | &CurrWriteSize,\r | |
299 | CurrBuffer\r | |
300 | );\r | |
8d3a5c82 | 301 | return Status;\r |
8d3a5c82 | 302 | } else {\r |
303 | Size = (UINT32) (LinearOffset + PtrBlockMapEntry->Length - CurrWritePtr);\r | |
304 | Status = EfiFvbWriteBlock (\r | |
305 | Instance,\r | |
306 | LbaNumber,\r | |
307 | (UINTN) (CurrWritePtr - LinearOffset),\r | |
308 | &Size,\r | |
309 | CurrBuffer\r | |
310 | );\r | |
311 | if (EFI_ERROR (Status)) {\r | |
312 | return Status;\r | |
313 | }\r | |
314 | \r | |
315 | CurrWritePtr = LinearOffset + PtrBlockMapEntry->Length;\r | |
316 | CurrBuffer = CurrBuffer + Size;\r | |
317 | CurrWriteSize = CurrWriteSize - Size;\r | |
318 | }\r | |
319 | }\r | |
320 | \r | |
321 | LinearOffset += PtrBlockMapEntry->Length;\r | |
322 | LbaNumber++;\r | |
323 | }\r | |
324 | }\r | |
325 | \r | |
326 | return EFI_SUCCESS;\r | |
327 | }\r | |
328 | \r | |
052ad7e1 | 329 | \r |
8d3a5c82 | 330 | VARIABLE_STORE_STATUS\r |
8d3a5c82 | 331 | GetVariableStoreStatus (\r |
332 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
333 | )\r | |
334 | /*++\r | |
335 | \r | |
336 | Routine Description:\r | |
337 | \r | |
338 | This code gets the current status of Variable Store.\r | |
339 | \r | |
340 | Arguments:\r | |
341 | \r | |
342 | VarStoreHeader Pointer to the Variable Store Header.\r | |
343 | \r | |
344 | Returns:\r | |
345 | \r | |
346 | EfiRaw Variable store status is raw\r | |
347 | EfiValid Variable store status is valid\r | |
348 | EfiInvalid Variable store status is invalid\r | |
349 | \r | |
350 | --*/\r | |
351 | {\r | |
352 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r | |
353 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r | |
354 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r | |
355 | ) {\r | |
356 | \r | |
357 | return EfiValid;\r | |
358 | } else if (VarStoreHeader->Signature == 0xffffffff &&\r | |
359 | VarStoreHeader->Size == 0xffffffff &&\r | |
360 | VarStoreHeader->Format == 0xff &&\r | |
361 | VarStoreHeader->State == 0xff\r | |
362 | ) {\r | |
363 | \r | |
364 | return EfiRaw;\r | |
365 | } else {\r | |
366 | return EfiInvalid;\r | |
367 | }\r | |
368 | }\r | |
369 | \r | |
052ad7e1 | 370 | \r |
fdb7765f | 371 | UINT32\r |
372 | NameSizeOfVariable (\r | |
373 | IN VARIABLE_HEADER *Variable\r | |
374 | )\r | |
375 | {\r | |
376 | //\r | |
377 | // Check whether the header is valid fully;\r | |
378 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
379 | // \r | |
380 | if (Variable->DataSize == (UINT32) -1 || \r | |
381 | Variable->Attributes == (UINT32) -1 || \r | |
382 | Variable->NameSize == (UINT32) -1) {\r | |
383 | return 0;\r | |
384 | }\r | |
385 | return Variable->NameSize;\r | |
386 | }\r | |
387 | \r | |
388 | UINT32\r | |
389 | DataSizeOfVariable (\r | |
390 | IN VARIABLE_HEADER *Variable\r | |
391 | )\r | |
392 | {\r | |
393 | //\r | |
394 | // Check whether the header is valid fully;\r | |
395 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
396 | // \r | |
397 | if (Variable->DataSize == (UINT32) -1 || \r | |
398 | Variable->Attributes == (UINT32) -1 || \r | |
399 | Variable->NameSize == (UINT32) -1) {\r | |
400 | return 0;\r | |
401 | }\r | |
402 | return Variable->DataSize;\r | |
403 | }\r | |
404 | \r | |
405 | UINT32\r | |
406 | AttributesOfVariable (\r | |
407 | IN VARIABLE_HEADER *Variable\r | |
408 | )\r | |
409 | {\r | |
410 | \r | |
411 | //\r | |
412 | // Check whether the header is valid fully;\r | |
413 | // Tricky: The unprogramed data in FLASH equals 0xff.\r | |
414 | // \r | |
415 | if (Variable->DataSize == (UINT32) -1 || \r | |
416 | Variable->Attributes == (UINT32) -1 || \r | |
417 | Variable->NameSize == (UINT32) -1) {\r | |
418 | return 0;\r | |
419 | }\r | |
420 | return Variable->Attributes;\r | |
421 | }\r | |
422 | \r | |
423 | \r | |
8d3a5c82 | 424 | UINT8 *\r |
8d3a5c82 | 425 | GetVariableDataPtr (\r |
426 | IN VARIABLE_HEADER *Variable\r | |
427 | )\r | |
428 | /*++\r | |
429 | \r | |
430 | Routine Description:\r | |
431 | \r | |
432 | This code gets the pointer to the variable data.\r | |
433 | \r | |
434 | Arguments:\r | |
435 | \r | |
436 | Variable Pointer to the Variable Header.\r | |
437 | \r | |
438 | Returns:\r | |
439 | \r | |
440 | UINT8* Pointer to Variable Data\r | |
441 | \r | |
442 | --*/\r | |
443 | {\r | |
444 | //\r | |
445 | // Be careful about pad size for alignment\r | |
446 | //\r | |
fdb7765f | 447 | return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + NameSizeOfVariable (Variable) + GET_PAD_SIZE (NameSizeOfVariable (Variable)));\r |
8d3a5c82 | 448 | }\r |
449 | \r | |
052ad7e1 | 450 | \r |
8d3a5c82 | 451 | VARIABLE_HEADER *\r |
8d3a5c82 | 452 | GetNextVariablePtr (\r |
453 | IN VARIABLE_HEADER *Variable\r | |
454 | )\r | |
455 | /*++\r | |
456 | \r | |
457 | Routine Description:\r | |
458 | \r | |
459 | This code gets the pointer to the next variable header.\r | |
460 | \r | |
461 | Arguments:\r | |
462 | \r | |
463 | Variable Pointer to the Variable Header.\r | |
464 | \r | |
465 | Returns:\r | |
466 | \r | |
467 | VARIABLE_HEADER* Pointer to next variable header.\r | |
468 | \r | |
469 | --*/\r | |
470 | {\r | |
471 | if (!IsValidVariableHeader (Variable)) {\r | |
472 | return NULL;\r | |
473 | }\r | |
474 | //\r | |
475 | // Be careful about pad size for alignment\r | |
476 | //\r | |
9cad030b | 477 | return (VARIABLE_HEADER *) HEADER_ALIGN (((UINTN) GetVariableDataPtr (Variable) + DataSizeOfVariable (Variable) + GET_PAD_SIZE (DataSizeOfVariable (Variable))));\r |
8d3a5c82 | 478 | }\r |
479 | \r | |
9cad030b | 480 | VARIABLE_HEADER *\r |
481 | GetStartPointer (\r | |
482 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
483 | )\r | |
484 | /*++\r | |
485 | \r | |
486 | Routine Description:\r | |
487 | \r | |
488 | This code gets the pointer to the first variable memory pointer byte\r | |
489 | \r | |
490 | Arguments:\r | |
491 | \r | |
492 | VarStoreHeader Pointer to the Variable Store Header.\r | |
493 | \r | |
494 | Returns:\r | |
495 | \r | |
496 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
497 | \r | |
498 | --*/\r | |
499 | {\r | |
500 | //\r | |
501 | // The end of variable store\r | |
502 | //\r | |
503 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r | |
504 | }\r | |
052ad7e1 | 505 | \r |
8d3a5c82 | 506 | VARIABLE_HEADER *\r |
8d3a5c82 | 507 | GetEndPointer (\r |
508 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
509 | )\r | |
510 | /*++\r | |
511 | \r | |
512 | Routine Description:\r | |
513 | \r | |
514 | This code gets the pointer to the last variable memory pointer byte\r | |
515 | \r | |
516 | Arguments:\r | |
517 | \r | |
518 | VarStoreHeader Pointer to the Variable Store Header.\r | |
519 | \r | |
520 | Returns:\r | |
521 | \r | |
522 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
523 | \r | |
524 | --*/\r | |
525 | {\r | |
526 | //\r | |
527 | // The end of variable store\r | |
528 | //\r | |
9cad030b | 529 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r |
8d3a5c82 | 530 | }\r |
531 | \r | |
052ad7e1 | 532 | \r |
8d3a5c82 | 533 | EFI_STATUS\r |
8d3a5c82 | 534 | Reclaim (\r |
535 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
536 | OUT UINTN *LastVariableOffset,\r | |
537 | IN BOOLEAN IsVolatile\r | |
538 | )\r | |
539 | /*++\r | |
540 | \r | |
541 | Routine Description:\r | |
542 | \r | |
543 | Variable store garbage collection and reclaim operation\r | |
544 | \r | |
545 | Arguments:\r | |
546 | \r | |
547 | VariableBase Base address of variable store\r | |
548 | LastVariableOffset Offset of last variable\r | |
549 | IsVolatile The variable store is volatile or not,\r | |
550 | if it is non-volatile, need FTW\r | |
551 | \r | |
552 | Returns:\r | |
553 | \r | |
554 | EFI STATUS\r | |
555 | \r | |
556 | --*/\r | |
557 | {\r | |
558 | VARIABLE_HEADER *Variable;\r | |
559 | VARIABLE_HEADER *NextVariable;\r | |
560 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
561 | UINT8 *ValidBuffer;\r | |
562 | UINTN ValidBufferSize;\r | |
563 | UINTN VariableSize;\r | |
564 | UINT8 *CurrPtr;\r | |
565 | EFI_STATUS Status;\r | |
566 | \r | |
567 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);\r | |
568 | \r | |
569 | //\r | |
570 | // Start Pointers for the variable.\r | |
571 | //\r | |
9cad030b | 572 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 573 | ValidBufferSize = sizeof (VARIABLE_STORE_HEADER);\r |
574 | \r | |
575 | while (IsValidVariableHeader (Variable)) {\r | |
576 | NextVariable = GetNextVariablePtr (Variable);\r | |
577 | if (Variable->State == VAR_ADDED) {\r | |
578 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
579 | ValidBufferSize += VariableSize;\r | |
580 | }\r | |
581 | \r | |
582 | Variable = NextVariable;\r | |
583 | }\r | |
584 | \r | |
585 | ValidBuffer = AllocatePool (ValidBufferSize);\r | |
586 | if (ValidBuffer == NULL) {\r | |
587 | return EFI_OUT_OF_RESOURCES;\r | |
588 | }\r | |
589 | \r | |
590 | SetMem (ValidBuffer, ValidBufferSize, 0xff);\r | |
591 | \r | |
592 | CurrPtr = ValidBuffer;\r | |
593 | \r | |
594 | //\r | |
595 | // Copy variable store header\r | |
596 | //\r | |
597 | CopyMem (CurrPtr, VariableStoreHeader, sizeof (VARIABLE_STORE_HEADER));\r | |
9cad030b | 598 | CurrPtr = (UINT8 *) GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 599 | \r |
600 | //\r | |
601 | // Start Pointers for the variable.\r | |
602 | //\r | |
9cad030b | 603 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 604 | \r |
605 | while (IsValidVariableHeader (Variable)) {\r | |
606 | NextVariable = GetNextVariablePtr (Variable);\r | |
607 | if (Variable->State == VAR_ADDED) {\r | |
608 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
609 | CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r | |
610 | CurrPtr += VariableSize;\r | |
611 | }\r | |
612 | \r | |
613 | Variable = NextVariable;\r | |
614 | }\r | |
615 | \r | |
616 | if (IsVolatile) {\r | |
617 | //\r | |
618 | // If volatile variable store, just copy valid buffer\r | |
619 | //\r | |
620 | SetMem ((UINT8 *) (UINTN) VariableBase, VariableStoreHeader->Size, 0xff);\r | |
621 | CopyMem ((UINT8 *) (UINTN) VariableBase, ValidBuffer, ValidBufferSize);\r | |
622 | *LastVariableOffset = ValidBufferSize;\r | |
623 | Status = EFI_SUCCESS;\r | |
624 | } else {\r | |
625 | //\r | |
626 | // If non-volatile variable store, perform FTW here.\r | |
627 | //\r | |
628 | Status = FtwVariableSpace (\r | |
629 | VariableBase,\r | |
630 | ValidBuffer,\r | |
631 | ValidBufferSize\r | |
632 | );\r | |
633 | if (!EFI_ERROR (Status)) {\r | |
634 | *LastVariableOffset = ValidBufferSize;\r | |
635 | }\r | |
636 | }\r | |
637 | \r | |
638 | FreePool (ValidBuffer);\r | |
639 | \r | |
640 | if (EFI_ERROR (Status)) {\r | |
641 | *LastVariableOffset = 0;\r | |
642 | }\r | |
643 | \r | |
644 | return Status;\r | |
645 | }\r | |
646 | \r | |
33a5a666 A |
647 | \r |
648 | //\r | |
649 | // The current Hii implementation accesses this variable a larg # of times on every boot.\r | |
650 | // Other common variables are only accessed a single time. This is why this cache algorithm\r | |
651 | // only targets a single variable. Probably to get an performance improvement out of\r | |
652 | // a Cache you would need a cache that improves the search performance for a variable.\r | |
653 | //\r | |
654 | VARIABLE_CACHE_ENTRY mVariableCache[] = {\r | |
655 | {\r | |
656 | &gEfiGlobalVariableGuid,\r | |
657 | L"Lang",\r | |
658 | 0x00000000,\r | |
659 | 0x00,\r | |
660 | NULL\r | |
661 | }\r | |
662 | };\r | |
663 | \r | |
052ad7e1 A |
664 | \r |
665 | /**\r | |
666 | Update the Cache with Variable information. These are the same \r | |
667 | arguments as the EFI Variable services.\r | |
668 | \r | |
669 | @param[in] VariableName Name of variable\r | |
670 | @param[in] VendorGuid Guid of variable\r | |
671 | @param[in] Attribute Attribue of the variable\r | |
672 | @param[in] DataSize Size of data. 0 means delete\r | |
673 | @param[in] Data Variable data\r | |
674 | \r | |
675 | **/\r | |
33a5a666 A |
676 | VOID\r |
677 | UpdateVariableCache (\r | |
678 | IN CHAR16 *VariableName,\r | |
679 | IN EFI_GUID *VendorGuid,\r | |
052ad7e1 A |
680 | IN UINT32 Attributes,\r |
681 | IN UINTN DataSize,\r | |
682 | IN VOID *Data\r | |
33a5a666 A |
683 | )\r |
684 | {\r | |
685 | VARIABLE_CACHE_ENTRY *Entry;\r | |
686 | UINTN Index;\r | |
687 | \r | |
688 | if (EfiAtRuntime ()) {\r | |
689 | // Don't use the cache at runtime\r | |
690 | return;\r | |
691 | }\r | |
692 | \r | |
693 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
694 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
695 | if (StrCmp (VariableName, Entry->Name) == 0) { \r | |
696 | Entry->Attributes = Attributes;\r | |
697 | if (DataSize == 0) {\r | |
698 | // Delete Case\r | |
699 | if (Entry->DataSize != 0) {\r | |
700 | FreePool (Entry->Data);\r | |
701 | }\r | |
702 | Entry->DataSize = DataSize;\r | |
703 | } else if (DataSize == Entry->DataSize) {\r | |
704 | CopyMem (Entry->Data, Data, DataSize);\r | |
705 | } else {\r | |
706 | Entry->Data = AllocatePool (DataSize);\r | |
707 | Entry->DataSize = DataSize;\r | |
708 | CopyMem (Entry->Data, Data, DataSize);\r | |
709 | }\r | |
710 | }\r | |
711 | }\r | |
712 | }\r | |
713 | }\r | |
714 | \r | |
715 | \r | |
052ad7e1 A |
716 | /**\r |
717 | Search the cache to see if the variable is in the cache.\r | |
718 | \r | |
719 | @param[in] VariableName Name of variable\r | |
720 | @param[in] VendorGuid Guid of variable\r | |
721 | @param[in] Attribute Attribue returned \r | |
722 | @param[in] DataSize Size of data returned\r | |
723 | @param[in] Data Variable data returned\r | |
724 | \r | |
725 | @retval EFI_SUCCESS VariableGuid & VariableName data was returned.\r | |
726 | @retval other Not found.\r | |
727 | \r | |
728 | **/\r | |
33a5a666 A |
729 | EFI_STATUS\r |
730 | FindVariableInCache (\r | |
731 | IN CHAR16 *VariableName,\r | |
732 | IN EFI_GUID *VendorGuid,\r | |
733 | OUT UINT32 *Attributes OPTIONAL,\r | |
734 | IN OUT UINTN *DataSize,\r | |
735 | OUT VOID *Data\r | |
736 | )\r | |
737 | {\r | |
738 | VARIABLE_CACHE_ENTRY *Entry;\r | |
739 | UINTN Index;\r | |
740 | \r | |
741 | if (EfiAtRuntime ()) {\r | |
742 | // Don't use the cache at runtime\r | |
743 | return EFI_NOT_FOUND;\r | |
744 | }\r | |
745 | \r | |
746 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
747 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
748 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
749 | if (Entry->DataSize == 0) {\r | |
052ad7e1 | 750 | // Variable was deleted so return not found\r |
33a5a666 | 751 | return EFI_NOT_FOUND;\r |
aa09397b | 752 | } else if (Entry->DataSize > *DataSize) {\r |
052ad7e1 | 753 | // If the buffer is too small return correct size\r |
33a5a666 A |
754 | *DataSize = Entry->DataSize;\r |
755 | return EFI_BUFFER_TOO_SMALL;\r | |
756 | } else {\r | |
aa09397b | 757 | *DataSize = Entry->DataSize;\r |
052ad7e1 | 758 | // Return the data\r |
33a5a666 A |
759 | CopyMem (Data, Entry->Data, Entry->DataSize);\r |
760 | if (Attributes != NULL) {\r | |
761 | *Attributes = Entry->Attributes;\r | |
762 | }\r | |
763 | return EFI_SUCCESS;\r | |
764 | }\r | |
765 | }\r | |
766 | }\r | |
767 | }\r | |
768 | \r | |
769 | return EFI_NOT_FOUND;\r | |
770 | }\r | |
771 | \r | |
772 | \r | |
8d3a5c82 | 773 | EFI_STATUS\r |
8d3a5c82 | 774 | FindVariable (\r |
775 | IN CHAR16 *VariableName,\r | |
776 | IN EFI_GUID *VendorGuid,\r | |
777 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
778 | IN VARIABLE_GLOBAL *Global\r | |
779 | )\r | |
780 | /*++\r | |
781 | \r | |
782 | Routine Description:\r | |
783 | \r | |
784 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
785 | \r | |
786 | Arguments:\r | |
787 | \r | |
788 | VariableName Name of the variable to be found\r | |
789 | VendorGuid Vendor GUID to be found.\r | |
790 | PtrTrack Variable Track Pointer structure that contains\r | |
791 | Variable Information.\r | |
792 | Contains the pointer of Variable header.\r | |
793 | Global VARIABLE_GLOBAL pointer\r | |
794 | \r | |
795 | Returns:\r | |
796 | \r | |
797 | EFI STATUS\r | |
798 | \r | |
799 | --*/\r | |
800 | {\r | |
801 | VARIABLE_HEADER *Variable[2];\r | |
802 | VARIABLE_STORE_HEADER *VariableStoreHeader[2];\r | |
803 | UINTN Index;\r | |
804 | \r | |
8d3a5c82 | 805 | //\r |
33a5a666 | 806 | // 0: Volatile, 1: Non-Volatile\r |
36873a61 | 807 | // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName\r |
808 | // make use of this mapping to implement search algorithme.\r | |
8d3a5c82 | 809 | //\r |
052ad7e1 A |
810 | VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
811 | VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r | |
8d3a5c82 | 812 | \r |
813 | //\r | |
814 | // Start Pointers for the variable.\r | |
815 | // Actual Data Pointer where data can be written.\r | |
816 | //\r | |
9cad030b | 817 | Variable[0] = GetStartPointer (VariableStoreHeader[0]);\r |
818 | Variable[1] = GetStartPointer (VariableStoreHeader[1]);\r | |
8d3a5c82 | 819 | \r |
820 | if (VariableName[0] != 0 && VendorGuid == NULL) {\r | |
821 | return EFI_INVALID_PARAMETER;\r | |
822 | }\r | |
823 | //\r | |
33a5a666 | 824 | // Find the variable by walk through volatile and then non-volatile variable store\r |
8d3a5c82 | 825 | //\r |
826 | for (Index = 0; Index < 2; Index++) {\r | |
9cad030b | 827 | PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Index]);\r |
8d3a5c82 | 828 | PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);\r |
829 | \r | |
830 | while (IsValidVariableHeader (Variable[Index]) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {\r | |
831 | if (Variable[Index]->State == VAR_ADDED) {\r | |
c6492839 | 832 | if (!EfiAtRuntime () || (Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r |
8d3a5c82 | 833 | if (VariableName[0] == 0) {\r |
834 | PtrTrack->CurrPtr = Variable[Index];\r | |
33a5a666 | 835 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 836 | return EFI_SUCCESS;\r |
837 | } else {\r | |
838 | if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {\r | |
fdb7765f | 839 | ASSERT (NameSizeOfVariable (Variable[Index]) != 0);\r |
840 | if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), NameSizeOfVariable (Variable[Index]))) {\r | |
8d3a5c82 | 841 | PtrTrack->CurrPtr = Variable[Index];\r |
33a5a666 | 842 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 843 | return EFI_SUCCESS;\r |
844 | }\r | |
845 | }\r | |
846 | }\r | |
847 | }\r | |
848 | }\r | |
849 | \r | |
850 | Variable[Index] = GetNextVariablePtr (Variable[Index]);\r | |
851 | }\r | |
8d3a5c82 | 852 | }\r |
8d3a5c82 | 853 | PtrTrack->CurrPtr = NULL;\r |
854 | return EFI_NOT_FOUND;\r | |
855 | }\r | |
856 | \r | |
33a5a666 | 857 | \r |
052ad7e1 | 858 | \r |
8d3a5c82 | 859 | /*++\r |
860 | \r | |
861 | Routine Description:\r | |
862 | \r | |
863 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
864 | \r | |
865 | Arguments:\r | |
866 | \r | |
c6492839 | 867 | VariableName Name of Variable to be found\r |
868 | VendorGuid Variable vendor GUID\r | |
869 | Attributes OPTIONAL Attribute value of the variable found\r | |
870 | DataSize Size of Data found. If size is less than the\r | |
871 | data, this value contains the required size.\r | |
872 | Data Data pointer\r | |
873 | Global Pointer to VARIABLE_GLOBAL structure\r | |
874 | Instance Instance of the Firmware Volume.\r | |
8d3a5c82 | 875 | \r |
876 | Returns:\r | |
877 | \r | |
c6492839 | 878 | EFI_INVALID_PARAMETER - Invalid parameter\r |
879 | EFI_SUCCESS - Find the specified variable\r | |
880 | EFI_NOT_FOUND - Not found\r | |
881 | EFI_BUFFER_TO_SMALL - DataSize is too small for the result\r | |
882 | \r | |
8d3a5c82 | 883 | \r |
884 | --*/\r | |
052ad7e1 A |
885 | EFI_STATUS\r |
886 | EFIAPI\r | |
887 | RuntimeServiceGetVariable (\r | |
888 | IN CHAR16 *VariableName,\r | |
889 | IN EFI_GUID *VendorGuid,\r | |
890 | OUT UINT32 *Attributes OPTIONAL,\r | |
891 | IN OUT UINTN *DataSize,\r | |
892 | OUT VOID *Data\r | |
893 | )\r | |
8d3a5c82 | 894 | {\r |
052ad7e1 | 895 | EFI_STATUS Status;\r |
8d3a5c82 | 896 | VARIABLE_POINTER_TRACK Variable;\r |
897 | UINTN VarDataSize;\r | |
8d3a5c82 | 898 | \r |
899 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
900 | return EFI_INVALID_PARAMETER;\r | |
901 | }\r | |
33a5a666 | 902 | \r |
fdb7765f | 903 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
904 | \r | |
8d3a5c82 | 905 | //\r |
906 | // Find existing variable\r | |
907 | //\r | |
33a5a666 A |
908 | Status = FindVariableInCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
909 | if ((Status == EFI_BUFFER_TOO_SMALL) || (Status == EFI_SUCCESS)){\r | |
910 | // Hit in the Cache\r | |
911 | UpdateVariableInfo (VariableName, VendorGuid, FALSE, TRUE, FALSE, FALSE, TRUE);\r | |
fdb7765f | 912 | goto Done;\r |
33a5a666 A |
913 | }\r |
914 | \r | |
052ad7e1 | 915 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 916 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
917 | goto Done;\r | |
918 | }\r | |
33a5a666 | 919 | \r |
8d3a5c82 | 920 | //\r |
921 | // Get data size\r | |
922 | //\r | |
fdb7765f | 923 | VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r |
924 | ASSERT (VarDataSize != 0);\r | |
925 | \r | |
8d3a5c82 | 926 | if (*DataSize >= VarDataSize) {\r |
927 | if (Data == NULL) {\r | |
928 | Status = EFI_INVALID_PARAMETER;\r | |
929 | goto Done;\r | |
930 | }\r | |
931 | \r | |
932 | CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r | |
933 | if (Attributes != NULL) {\r | |
934 | *Attributes = Variable.CurrPtr->Attributes;\r | |
935 | }\r | |
936 | \r | |
937 | *DataSize = VarDataSize;\r | |
33a5a666 A |
938 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r |
939 | UpdateVariableCache (VariableName, VendorGuid, Variable.CurrPtr->Attributes, VarDataSize, Data);\r | |
940 | \r | |
8d3a5c82 | 941 | Status = EFI_SUCCESS;\r |
942 | goto Done;\r | |
943 | } else {\r | |
944 | *DataSize = VarDataSize;\r | |
945 | Status = EFI_BUFFER_TOO_SMALL;\r | |
946 | goto Done;\r | |
947 | }\r | |
948 | \r | |
949 | Done:\r | |
052ad7e1 | 950 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 951 | return Status;\r |
952 | }\r | |
953 | \r | |
052ad7e1 A |
954 | \r |
955 | \r | |
8d3a5c82 | 956 | /*++\r |
957 | \r | |
958 | Routine Description:\r | |
959 | \r | |
960 | This code Finds the Next available variable\r | |
961 | \r | |
962 | Arguments:\r | |
963 | \r | |
964 | VariableNameSize Size of the variable\r | |
965 | VariableName Pointer to variable name\r | |
966 | VendorGuid Variable Vendor Guid\r | |
967 | Global VARIABLE_GLOBAL structure pointer.\r | |
968 | Instance FV instance\r | |
969 | \r | |
970 | Returns:\r | |
971 | \r | |
972 | EFI STATUS\r | |
973 | \r | |
974 | --*/\r | |
052ad7e1 A |
975 | EFI_STATUS\r |
976 | EFIAPI\r | |
977 | RuntimeServiceGetNextVariableName (\r | |
978 | IN OUT UINTN *VariableNameSize,\r | |
979 | IN OUT CHAR16 *VariableName,\r | |
980 | IN OUT EFI_GUID *VendorGuid\r | |
981 | )\r | |
8d3a5c82 | 982 | {\r |
983 | VARIABLE_POINTER_TRACK Variable;\r | |
984 | UINTN VarNameSize;\r | |
985 | EFI_STATUS Status;\r | |
986 | \r | |
987 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
988 | return EFI_INVALID_PARAMETER;\r | |
989 | }\r | |
990 | \r | |
fdb7765f | 991 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
992 | \r | |
052ad7e1 | 993 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 994 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
995 | goto Done;\r | |
996 | }\r | |
997 | \r | |
998 | if (VariableName[0] != 0) {\r | |
999 | //\r | |
1000 | // If variable name is not NULL, get next variable\r | |
1001 | //\r | |
1002 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
1003 | }\r | |
1004 | \r | |
1005 | while (TRUE) {\r | |
1006 | //\r | |
1007 | // If both volatile and non-volatile variable store are parsed,\r | |
1008 | // return not found\r | |
1009 | //\r | |
1010 | if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r | |
1011 | Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r | |
36873a61 | 1012 | if (!Variable.Volatile) {\r |
9cad030b | 1013 | Variable.StartPtr = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
1014 | Variable.EndPtr = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase));\r | |
8d3a5c82 | 1015 | } else {\r |
1016 | Status = EFI_NOT_FOUND;\r | |
1017 | goto Done;\r | |
1018 | }\r | |
1019 | \r | |
1020 | Variable.CurrPtr = Variable.StartPtr;\r | |
1021 | if (!IsValidVariableHeader (Variable.CurrPtr)) {\r | |
1022 | continue;\r | |
1023 | }\r | |
1024 | }\r | |
1025 | //\r | |
1026 | // Variable is found\r | |
1027 | //\r | |
1028 | if (IsValidVariableHeader (Variable.CurrPtr) && Variable.CurrPtr->State == VAR_ADDED) {\r | |
1029 | if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {\r | |
fdb7765f | 1030 | VarNameSize = NameSizeOfVariable (Variable.CurrPtr);\r |
1031 | ASSERT (VarNameSize != 0);\r | |
1032 | \r | |
8d3a5c82 | 1033 | if (VarNameSize <= *VariableNameSize) {\r |
1034 | CopyMem (\r | |
1035 | VariableName,\r | |
1036 | GET_VARIABLE_NAME_PTR (Variable.CurrPtr),\r | |
1037 | VarNameSize\r | |
1038 | );\r | |
1039 | CopyMem (\r | |
1040 | VendorGuid,\r | |
1041 | &Variable.CurrPtr->VendorGuid,\r | |
1042 | sizeof (EFI_GUID)\r | |
1043 | );\r | |
1044 | Status = EFI_SUCCESS;\r | |
1045 | } else {\r | |
1046 | Status = EFI_BUFFER_TOO_SMALL;\r | |
1047 | }\r | |
1048 | \r | |
1049 | *VariableNameSize = VarNameSize;\r | |
1050 | goto Done;\r | |
1051 | }\r | |
1052 | }\r | |
1053 | \r | |
1054 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
1055 | }\r | |
1056 | \r | |
1057 | Done:\r | |
052ad7e1 | 1058 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1059 | return Status;\r |
1060 | }\r | |
1061 | \r | |
052ad7e1 | 1062 | \r |
8d3a5c82 | 1063 | /*++\r |
1064 | \r | |
1065 | Routine Description:\r | |
1066 | \r | |
1067 | This code sets variable in storage blocks (Volatile or Non-Volatile)\r | |
1068 | \r | |
1069 | Arguments:\r | |
1070 | \r | |
1071 | VariableName Name of Variable to be found\r | |
1072 | VendorGuid Variable vendor GUID\r | |
1073 | Attributes Attribute value of the variable found\r | |
1074 | DataSize Size of Data found. If size is less than the\r | |
1075 | data, this value contains the required size.\r | |
1076 | Data Data pointer\r | |
1077 | Global Pointer to VARIABLE_GLOBAL structure\r | |
1078 | VolatileOffset The offset of last volatile variable\r | |
1079 | NonVolatileOffset The offset of last non-volatile variable\r | |
1080 | Instance Instance of the Firmware Volume.\r | |
1081 | \r | |
1082 | Returns:\r | |
1083 | \r | |
8d3a5c82 | 1084 | EFI_INVALID_PARAMETER - Invalid parameter\r |
1085 | EFI_SUCCESS - Set successfully\r | |
1086 | EFI_OUT_OF_RESOURCES - Resource not enough to set variable\r | |
1087 | EFI_NOT_FOUND - Not found\r | |
c6492839 | 1088 | EFI_DEVICE_ERROR - Variable can not be saved due to hardware failure\r |
1089 | EFI_WRITE_PROTECTED - Variable is read-only\r | |
8d3a5c82 | 1090 | \r |
1091 | --*/\r | |
052ad7e1 A |
1092 | EFI_STATUS\r |
1093 | EFIAPI\r | |
1094 | RuntimeServiceSetVariable (\r | |
1095 | IN CHAR16 *VariableName,\r | |
1096 | IN EFI_GUID *VendorGuid,\r | |
1097 | IN UINT32 Attributes,\r | |
1098 | IN UINTN DataSize,\r | |
1099 | IN VOID *Data\r | |
1100 | )\r | |
8d3a5c82 | 1101 | {\r |
1102 | VARIABLE_POINTER_TRACK Variable;\r | |
1103 | EFI_STATUS Status;\r | |
1104 | VARIABLE_HEADER *NextVariable;\r | |
1105 | UINTN VarNameSize;\r | |
1106 | UINTN VarNameOffset;\r | |
1107 | UINTN VarDataOffset;\r | |
1108 | UINTN VarSize;\r | |
1109 | UINT8 State;\r | |
1110 | BOOLEAN Reclaimed;\r | |
052ad7e1 A |
1111 | UINTN *VolatileOffset;\r |
1112 | UINTN *NonVolatileOffset;\r | |
1113 | UINT32 Instance;\r | |
fd51bf70 | 1114 | BOOLEAN Volatile;\r |
fdb7765f | 1115 | EFI_PHYSICAL_ADDRESS Point;\r |
8d3a5c82 | 1116 | \r |
c6492839 | 1117 | //\r |
1118 | // Check input parameters\r | |
1119 | //\r | |
8d3a5c82 | 1120 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r |
1121 | return EFI_INVALID_PARAMETER;\r | |
c6492839 | 1122 | } \r |
1123 | //\r | |
1124 | // Make sure if runtime bit is set, boot service bit is set also\r | |
1125 | //\r | |
1126 | if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r | |
1127 | return EFI_INVALID_PARAMETER;\r | |
8d3a5c82 | 1128 | }\r |
fdb7765f | 1129 | \r |
c6492839 | 1130 | //\r |
1131 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1132 | // the DataSize is limited to maximum size of MAX_HARDWARE_ERROR_VARIABLE_SIZE (32K)\r | |
1133 | // bytes for HwErrRec, and MAX_VARIABLE_SIZE (1024) bytes for the others.\r | |
1134 | //\r | |
1135 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1136 | if ((DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE) || \r | |
1137 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE)) {\r | |
1138 | return EFI_INVALID_PARAMETER;\r | |
1139 | } \r | |
1140 | } else {\r | |
1141 | //\r | |
1142 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1143 | // the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.\r | |
1144 | //\r | |
1145 | if ((DataSize > MAX_VARIABLE_SIZE) ||\r | |
1146 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_VARIABLE_SIZE)) {\r | |
1147 | return EFI_INVALID_PARAMETER;\r | |
1148 | } \r | |
1149 | } \r | |
fdb7765f | 1150 | \r |
1151 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1152 | \r | |
1153 | Reclaimed = FALSE;\r | |
1154 | Instance = mVariableModuleGlobal->FvbInstance;\r | |
1155 | VolatileOffset = &mVariableModuleGlobal->VolatileLastVariableOffset;\r | |
1156 | \r | |
1157 | //\r | |
1158 | // Consider reentrant in MCA/INIT/NMI. It needs be reupdated;\r | |
1159 | //\r | |
1160 | if (1 < InterlockedIncrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState)) {\r | |
fdb7765f | 1161 | Point = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;;\r |
1162 | //\r | |
1163 | // Parse non-volatile variable data and get last variable offset\r | |
1164 | //\r | |
9cad030b | 1165 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point);\r |
fdb7765f | 1166 | while (IsValidVariableHeader (NextVariable)) {\r |
1167 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1168 | }\r | |
1169 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) Point;\r | |
1170 | }\r | |
1171 | \r | |
1172 | NonVolatileOffset = &mVariableModuleGlobal->NonVolatileLastVariableOffset;\r | |
1173 | \r | |
1174 | \r | |
c6492839 | 1175 | //\r |
1176 | // Check whether the input variable is already existed\r | |
1177 | //\r | |
1178 | \r | |
052ad7e1 | 1179 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
c6492839 | 1180 | if (Status == EFI_SUCCESS && Variable.CurrPtr != NULL) {\r |
8d3a5c82 | 1181 | //\r |
c6492839 | 1182 | // Update/Delete existing variable\r |
8d3a5c82 | 1183 | //\r |
fd51bf70 | 1184 | Volatile = Variable.Volatile;\r |
c6492839 | 1185 | \r |
1186 | if (EfiAtRuntime ()) { \r | |
1187 | //\r | |
1188 | // If EfiAtRuntime and the variable is Volatile and Runtime Access, \r | |
1189 | // the volatile is ReadOnly, and SetVariable should be aborted and \r | |
1190 | // return EFI_WRITE_PROTECTED.\r | |
1191 | //\r | |
1192 | if (Variable.Volatile) {\r | |
1193 | Status = EFI_WRITE_PROTECTED;\r | |
1194 | goto Done;\r | |
1195 | }\r | |
1196 | //\r | |
1197 | // Only variable have NV attribute can be updated/deleted in Runtime\r | |
1198 | //\r | |
1199 | if (!(Variable.CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE)) {\r | |
1200 | Status = EFI_INVALID_PARAMETER;\r | |
1201 | goto Done; \r | |
1202 | }\r | |
1203 | }\r | |
8d3a5c82 | 1204 | //\r |
c6492839 | 1205 | // Setting a data variable with no access, or zero DataSize attributes\r |
1206 | // specified causes it to be deleted.\r | |
8d3a5c82 | 1207 | //\r |
c6492839 | 1208 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) { \r |
1209 | State = Variable.CurrPtr->State;\r | |
1210 | State &= VAR_DELETED;\r | |
1211 | \r | |
1212 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1213 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1214 | Variable.Volatile,\r |
1215 | FALSE,\r | |
1216 | Instance,\r | |
1217 | (UINTN) &Variable.CurrPtr->State,\r | |
1218 | sizeof (UINT8),\r | |
1219 | &State\r | |
1220 | ); \r | |
33a5a666 | 1221 | if (!EFI_ERROR (Status)) {\r |
fd51bf70 | 1222 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, FALSE, TRUE, FALSE);\r |
33a5a666 A |
1223 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1224 | }\r | |
c6492839 | 1225 | goto Done; \r |
1226 | }\r | |
8d3a5c82 | 1227 | //\r |
c6492839 | 1228 | // If the variable is marked valid and the same data has been passed in\r |
1229 | // then return to the caller immediately.\r | |
8d3a5c82 | 1230 | //\r |
fdb7765f | 1231 | if (DataSizeOfVariable (Variable.CurrPtr) == DataSize &&\r |
c6492839 | 1232 | (CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize) == 0)) {\r |
33a5a666 | 1233 | \r |
fd51bf70 | 1234 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
c6492839 | 1235 | Status = EFI_SUCCESS;\r |
1236 | goto Done;\r | |
1237 | } else if ((Variable.CurrPtr->State == VAR_ADDED) ||\r | |
1238 | (Variable.CurrPtr->State == (VAR_ADDED & VAR_IN_DELETED_TRANSITION))) {\r | |
1239 | //\r | |
1240 | // Mark the old variable as in delete transition\r | |
1241 | //\r | |
1242 | State = Variable.CurrPtr->State;\r | |
1243 | State &= VAR_IN_DELETED_TRANSITION;\r | |
1244 | \r | |
1245 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1246 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1247 | Variable.Volatile,\r |
1248 | FALSE,\r | |
1249 | Instance,\r | |
1250 | (UINTN) &Variable.CurrPtr->State,\r | |
1251 | sizeof (UINT8),\r | |
1252 | &State\r | |
1253 | ); \r | |
1254 | if (EFI_ERROR (Status)) {\r | |
1255 | goto Done; \r | |
33a5a666 | 1256 | } \r |
c6492839 | 1257 | } \r |
1258 | } else if (Status == EFI_NOT_FOUND) {\r | |
8d3a5c82 | 1259 | //\r |
c6492839 | 1260 | // Create a new variable\r |
1261 | // \r | |
1262 | \r | |
8d3a5c82 | 1263 | //\r |
c6492839 | 1264 | // Make sure we are trying to create a new variable.\r |
1265 | // Setting a data variable with no access, or zero DataSize attributes means to delete it. \r | |
8d3a5c82 | 1266 | //\r |
c6492839 | 1267 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r |
1268 | Status = EFI_NOT_FOUND;\r | |
1269 | goto Done;\r | |
1270 | }\r | |
1271 | \r | |
8d3a5c82 | 1272 | //\r |
c6492839 | 1273 | // Only variable have NV|RT attribute can be created in Runtime\r |
1274 | //\r | |
1275 | if (EfiAtRuntime () &&\r | |
1276 | (!(Attributes & EFI_VARIABLE_RUNTIME_ACCESS) || !(Attributes & EFI_VARIABLE_NON_VOLATILE))) {\r | |
1277 | Status = EFI_INVALID_PARAMETER;\r | |
1278 | goto Done;\r | |
1279 | } \r | |
1280 | } else {\r | |
8d3a5c82 | 1281 | //\r |
c6492839 | 1282 | // Status should be EFI_INVALID_PARAMETER here according to return status of FindVariable().\r |
8d3a5c82 | 1283 | //\r |
c6492839 | 1284 | ASSERT (Status == EFI_INVALID_PARAMETER);\r |
8d3a5c82 | 1285 | goto Done;\r |
c6492839 | 1286 | }\r |
1287 | \r | |
1288 | //\r | |
1289 | // Function part - create a new variable and copy the data.\r | |
1290 | // Both update a variable and create a variable will come here.\r | |
1291 | //\r | |
1292 | // Tricky part: Use scratch data area at the end of volatile variable store\r | |
1293 | // as a temporary storage.\r | |
1294 | //\r | |
052ad7e1 | 1295 | NextVariable = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r |
c6492839 | 1296 | \r |
1297 | SetMem (NextVariable, SCRATCH_SIZE, 0xff);\r | |
1298 | \r | |
1299 | NextVariable->StartId = VARIABLE_DATA;\r | |
1300 | NextVariable->Attributes = Attributes;\r | |
1301 | //\r | |
1302 | // NextVariable->State = VAR_ADDED;\r | |
1303 | //\r | |
1304 | NextVariable->Reserved = 0;\r | |
1305 | VarNameOffset = sizeof (VARIABLE_HEADER);\r | |
1306 | VarNameSize = StrSize (VariableName);\r | |
1307 | CopyMem (\r | |
1308 | (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r | |
1309 | VariableName,\r | |
1310 | VarNameSize\r | |
1311 | );\r | |
1312 | VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
1313 | CopyMem (\r | |
1314 | (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r | |
1315 | Data,\r | |
1316 | DataSize\r | |
1317 | );\r | |
1318 | CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r | |
1319 | //\r | |
1320 | // There will be pad bytes after Data, the NextVariable->NameSize and\r | |
1321 | // NextVariable->DataSize should not include pad size so that variable\r | |
1322 | // service can get actual size in GetVariable\r | |
1323 | //\r | |
1324 | NextVariable->NameSize = (UINT32)VarNameSize;\r | |
1325 | NextVariable->DataSize = (UINT32)DataSize;\r | |
1326 | \r | |
1327 | //\r | |
1328 | // The actual size of the variable that stores in storage should\r | |
1329 | // include pad size.\r | |
1330 | //\r | |
1331 | VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);\r | |
1332 | if (Attributes & EFI_VARIABLE_NON_VOLATILE) {\r | |
8d3a5c82 | 1333 | //\r |
c6492839 | 1334 | // Create a nonvolatile variable\r |
8d3a5c82 | 1335 | //\r |
fd51bf70 | 1336 | Volatile = FALSE;\r |
c6492839 | 1337 | \r |
1338 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r | |
052ad7e1 | 1339 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
c6492839 | 1340 | ) {\r |
1341 | if (EfiAtRuntime ()) {\r | |
1342 | Status = EFI_OUT_OF_RESOURCES;\r | |
1343 | goto Done;\r | |
1344 | }\r | |
1345 | //\r | |
1346 | // Perform garbage collection & reclaim operation\r | |
1347 | //\r | |
052ad7e1 | 1348 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase, NonVolatileOffset, FALSE);\r |
8d3a5c82 | 1349 | if (EFI_ERROR (Status)) {\r |
1350 | goto Done;\r | |
1351 | }\r | |
8d3a5c82 | 1352 | //\r |
c6492839 | 1353 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1354 | //\r |
c6492839 | 1355 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r |
052ad7e1 | 1356 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
8d3a5c82 | 1357 | ) {\r |
c6492839 | 1358 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1359 | goto Done;\r |
8d3a5c82 | 1360 | }\r |
c6492839 | 1361 | \r |
1362 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1363 | }\r |
1364 | //\r | |
c6492839 | 1365 | // Three steps\r |
1366 | // 1. Write variable header\r | |
1367 | // 2. Write variable data\r | |
1368 | // 3. Set variable state to valid\r | |
8d3a5c82 | 1369 | //\r |
8d3a5c82 | 1370 | //\r |
c6492839 | 1371 | // Step 1:\r |
8d3a5c82 | 1372 | //\r |
c6492839 | 1373 | Status = UpdateVariableStore (\r |
052ad7e1 | 1374 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1375 | FALSE,\r |
1376 | TRUE,\r | |
1377 | Instance,\r | |
1378 | *NonVolatileOffset,\r | |
1379 | sizeof (VARIABLE_HEADER),\r | |
1380 | (UINT8 *) NextVariable\r | |
1381 | );\r | |
1382 | \r | |
1383 | if (EFI_ERROR (Status)) {\r | |
1384 | goto Done;\r | |
1385 | }\r | |
8d3a5c82 | 1386 | //\r |
c6492839 | 1387 | // Step 2:\r |
8d3a5c82 | 1388 | //\r |
c6492839 | 1389 | Status = UpdateVariableStore (\r |
052ad7e1 | 1390 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1391 | FALSE,\r |
1392 | TRUE,\r | |
1393 | Instance,\r | |
1394 | *NonVolatileOffset + sizeof (VARIABLE_HEADER),\r | |
1395 | (UINT32) VarSize - sizeof (VARIABLE_HEADER),\r | |
1396 | (UINT8 *) NextVariable + sizeof (VARIABLE_HEADER)\r | |
1397 | );\r | |
1398 | \r | |
1399 | if (EFI_ERROR (Status)) {\r | |
1400 | goto Done;\r | |
1401 | }\r | |
8d3a5c82 | 1402 | //\r |
c6492839 | 1403 | // Step 3:\r |
8d3a5c82 | 1404 | //\r |
c6492839 | 1405 | NextVariable->State = VAR_ADDED;\r |
1406 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1407 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1408 | FALSE,\r |
1409 | TRUE,\r | |
1410 | Instance,\r | |
1411 | *NonVolatileOffset,\r | |
1412 | sizeof (VARIABLE_HEADER),\r | |
1413 | (UINT8 *) NextVariable\r | |
1414 | );\r | |
1415 | \r | |
1416 | if (EFI_ERROR (Status)) {\r | |
1417 | goto Done;\r | |
1418 | }\r | |
8d3a5c82 | 1419 | \r |
9cad030b | 1420 | *NonVolatileOffset = HEADER_ALIGN (*NonVolatileOffset + VarSize);\r |
8d3a5c82 | 1421 | \r |
c6492839 | 1422 | } else {\r |
1423 | //\r | |
1424 | // Create a volatile variable\r | |
1425 | // \r | |
fd51bf70 | 1426 | Volatile = TRUE;\r |
c6492839 | 1427 | \r |
1428 | if ((UINT32) (VarSize +*VolatileOffset) >\r | |
052ad7e1 | 1429 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size) {\r |
8d3a5c82 | 1430 | //\r |
c6492839 | 1431 | // Perform garbage collection & reclaim operation\r |
8d3a5c82 | 1432 | //\r |
052ad7e1 | 1433 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase, VolatileOffset, TRUE);\r |
8d3a5c82 | 1434 | if (EFI_ERROR (Status)) {\r |
1435 | goto Done;\r | |
1436 | }\r | |
1437 | //\r | |
c6492839 | 1438 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1439 | //\r |
8d3a5c82 | 1440 | if ((UINT32) (VarSize +*VolatileOffset) >\r |
052ad7e1 | 1441 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size\r |
8d3a5c82 | 1442 | ) {\r |
c6492839 | 1443 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1444 | goto Done;\r |
1445 | }\r | |
c6492839 | 1446 | \r |
1447 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1448 | }\r |
8d3a5c82 | 1449 | \r |
c6492839 | 1450 | NextVariable->State = VAR_ADDED;\r |
1451 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1452 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1453 | TRUE,\r |
1454 | TRUE,\r | |
1455 | Instance,\r | |
1456 | *VolatileOffset,\r | |
1457 | (UINT32) VarSize,\r | |
1458 | (UINT8 *) NextVariable\r | |
1459 | );\r | |
1460 | \r | |
1461 | if (EFI_ERROR (Status)) {\r | |
1462 | goto Done;\r | |
8d3a5c82 | 1463 | }\r |
c6492839 | 1464 | \r |
9cad030b | 1465 | *VolatileOffset = HEADER_ALIGN (*VolatileOffset + VarSize);\r |
c6492839 | 1466 | }\r |
1467 | //\r | |
1468 | // Mark the old variable as deleted\r | |
1469 | //\r | |
1470 | if (!Reclaimed && !EFI_ERROR (Status) && Variable.CurrPtr != NULL) {\r | |
1471 | State = Variable.CurrPtr->State;\r | |
1472 | State &= VAR_DELETED;\r | |
1473 | \r | |
1474 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1475 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1476 | Variable.Volatile,\r |
1477 | FALSE,\r | |
1478 | Instance,\r | |
1479 | (UINTN) &Variable.CurrPtr->State,\r | |
1480 | sizeof (UINT8),\r | |
1481 | &State\r | |
1482 | );\r | |
33a5a666 A |
1483 | \r |
1484 | if (!EFI_ERROR (Status)) {\r | |
fd51bf70 | 1485 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1486 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1487 | }\r | |
c6492839 | 1488 | goto Done; \r |
8d3a5c82 | 1489 | }\r |
1490 | \r | |
1491 | Status = EFI_SUCCESS;\r | |
fd51bf70 | 1492 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1493 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1494 | \r | |
8d3a5c82 | 1495 | Done:\r |
fdb7765f | 1496 | InterlockedDecrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState);\r |
052ad7e1 | 1497 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
fdb7765f | 1498 | \r |
8d3a5c82 | 1499 | return Status;\r |
1500 | }\r | |
1501 | \r | |
052ad7e1 | 1502 | \r |
8d3a5c82 | 1503 | /*++\r |
1504 | \r | |
1505 | Routine Description:\r | |
1506 | \r | |
1507 | This code returns information about the EFI variables.\r | |
1508 | \r | |
1509 | Arguments:\r | |
1510 | \r | |
1511 | Attributes Attributes bitmask to specify the type of variables\r | |
1512 | on which to return information.\r | |
1513 | MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
1514 | for the EFI variables associated with the attributes specified.\r | |
1515 | RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
c6492839 | 1516 | for EFI variables associated with the attributes specified.\r |
1517 | MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
8d3a5c82 | 1518 | associated with the attributes specified.\r |
1519 | Global Pointer to VARIABLE_GLOBAL structure.\r | |
1520 | Instance Instance of the Firmware Volume.\r | |
1521 | \r | |
1522 | Returns:\r | |
1523 | \r | |
1524 | EFI STATUS\r | |
1525 | EFI_INVALID_PARAMETER - An invalid combination of attribute bits was supplied.\r | |
1526 | EFI_SUCCESS - Query successfully.\r | |
1527 | EFI_UNSUPPORTED - The attribute is not supported on this platform.\r | |
1528 | \r | |
1529 | --*/\r | |
052ad7e1 A |
1530 | EFI_STATUS\r |
1531 | EFIAPI\r | |
1532 | RuntimeServiceQueryVariableInfo (\r | |
1533 | IN UINT32 Attributes,\r | |
1534 | OUT UINT64 *MaximumVariableStorageSize,\r | |
1535 | OUT UINT64 *RemainingVariableStorageSize,\r | |
1536 | OUT UINT64 *MaximumVariableSize\r | |
1537 | )\r | |
8d3a5c82 | 1538 | {\r |
1539 | VARIABLE_HEADER *Variable;\r | |
1540 | VARIABLE_HEADER *NextVariable;\r | |
1541 | UINT64 VariableSize;\r | |
1542 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1543 | \r | |
c6492839 | 1544 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
8d3a5c82 | 1545 | return EFI_INVALID_PARAMETER;\r |
1546 | }\r | |
c6492839 | 1547 | \r |
1548 | if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {\r | |
8d3a5c82 | 1549 | //\r |
1550 | // Make sure the Attributes combination is supported by the platform.\r | |
1551 | //\r | |
c6492839 | 1552 | return EFI_UNSUPPORTED; \r |
8d3a5c82 | 1553 | } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r |
1554 | //\r | |
1555 | // Make sure if runtime bit is set, boot service bit is set also.\r | |
1556 | //\r | |
1557 | return EFI_INVALID_PARAMETER;\r | |
1558 | } else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r | |
1559 | //\r | |
1560 | // Make sure RT Attribute is set if we are in Runtime phase.\r | |
1561 | //\r | |
1562 | return EFI_INVALID_PARAMETER;\r | |
1563 | }\r | |
1564 | \r | |
052ad7e1 | 1565 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1566 | \r |
1567 | if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r | |
1568 | //\r | |
1569 | // Query is Volatile related.\r | |
1570 | //\r | |
052ad7e1 | 1571 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
8d3a5c82 | 1572 | } else {\r |
1573 | //\r | |
1574 | // Query is Non-Volatile related.\r | |
1575 | //\r | |
052ad7e1 | 1576 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1577 | }\r |
1578 | \r | |
1579 | //\r | |
1580 | // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize\r | |
1581 | // with the storage size (excluding the storage header size).\r | |
1582 | //\r | |
1583 | *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1584 | *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1585 | \r | |
1586 | //\r | |
c6492839 | 1587 | // Let *MaximumVariableSize be MAX_VARIABLE_SIZE with the exception of the variable header size.\r |
8d3a5c82 | 1588 | //\r |
c6492839 | 1589 | *MaximumVariableSize = MAX_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r |
1590 | \r | |
1591 | //\r | |
1592 | // Harware error record variable needs larger size.\r | |
1593 | //\r | |
1594 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1595 | *MaximumVariableSize = MAX_HARDWARE_ERROR_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r | |
1596 | }\r | |
8d3a5c82 | 1597 | \r |
1598 | //\r | |
1599 | // Point to the starting address of the variables.\r | |
1600 | //\r | |
9cad030b | 1601 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 1602 | \r |
1603 | //\r | |
1604 | // Now walk through the related variable store.\r | |
1605 | //\r | |
1606 | while (IsValidVariableHeader (Variable) && (Variable < GetEndPointer (VariableStoreHeader))) {\r | |
1607 | NextVariable = GetNextVariablePtr (Variable);\r | |
1608 | VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r | |
1609 | \r | |
1610 | if (EfiAtRuntime ()) {\r | |
1611 | //\r | |
1612 | // we don't take the state of the variables in mind\r | |
1613 | // when calculating RemainingVariableStorageSize,\r | |
1614 | // since the space occupied by variables not marked with\r | |
1615 | // VAR_ADDED is not allowed to be reclaimed in Runtime.\r | |
1616 | //\r | |
1617 | *RemainingVariableStorageSize -= VariableSize;\r | |
1618 | } else {\r | |
1619 | //\r | |
1620 | // Only care about Variables with State VAR_ADDED,because\r | |
1621 | // the space not marked as VAR_ADDED is reclaimable now.\r | |
1622 | //\r | |
1623 | if (Variable->State == VAR_ADDED) {\r | |
1624 | *RemainingVariableStorageSize -= VariableSize;\r | |
1625 | }\r | |
1626 | }\r | |
1627 | \r | |
1628 | //\r | |
1629 | // Go to the next one\r | |
1630 | //\r | |
1631 | Variable = NextVariable;\r | |
1632 | }\r | |
1633 | \r | |
c6492839 | 1634 | if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {\r |
1635 | *MaximumVariableSize = 0;\r | |
1636 | } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {\r | |
1637 | *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);\r | |
1638 | }\r | |
1639 | \r | |
052ad7e1 | 1640 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1641 | return EFI_SUCCESS;\r |
1642 | }\r | |
1643 | \r | |
1644 | EFI_STATUS\r | |
8d3a5c82 | 1645 | VariableCommonInitialize (\r |
1646 | IN EFI_HANDLE ImageHandle,\r | |
1647 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1648 | )\r | |
1649 | /*++\r | |
1650 | \r | |
1651 | Routine Description:\r | |
1652 | This function does common initialization for variable services\r | |
1653 | \r | |
1654 | Arguments:\r | |
1655 | \r | |
1656 | ImageHandle - The firmware allocated handle for the EFI image.\r | |
1657 | SystemTable - A pointer to the EFI System Table.\r | |
1658 | \r | |
1659 | Returns:\r | |
1660 | \r | |
1661 | Status code.\r | |
1662 | \r | |
1663 | EFI_NOT_FOUND - Variable store area not found.\r | |
1664 | EFI_UNSUPPORTED - Currently only one non-volatile variable store is supported.\r | |
1665 | EFI_SUCCESS - Variable services successfully initialized.\r | |
1666 | \r | |
1667 | --*/\r | |
1668 | {\r | |
1669 | EFI_STATUS Status;\r | |
1670 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
1671 | CHAR8 *CurrPtr;\r | |
1672 | VARIABLE_STORE_HEADER *VolatileVariableStore;\r | |
1673 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1674 | VARIABLE_HEADER *NextVariable;\r | |
1675 | UINT32 Instance;\r | |
1676 | EFI_PHYSICAL_ADDRESS FvVolHdr;\r | |
8d3a5c82 | 1677 | UINT64 TempVariableStoreHeader;\r |
8d3a5c82 | 1678 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r |
8d3a5c82 | 1679 | UINT64 BaseAddress;\r |
1680 | UINT64 Length;\r | |
1681 | UINTN Index;\r | |
1682 | UINT8 Data;\r | |
052ad7e1 A |
1683 | UINT64 VariableStoreBase;\r |
1684 | UINT64 VariableStoreLength;\r | |
8d3a5c82 | 1685 | \r |
8d3a5c82 | 1686 | \r |
052ad7e1 | 1687 | EfiInitializeLock(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock, TPL_NOTIFY);\r |
fdb7765f | 1688 | mVariableModuleGlobal->VariableGlobal.ReentrantState = 0;\r |
8d3a5c82 | 1689 | \r |
1690 | //\r | |
1691 | // Allocate memory for volatile variable store\r | |
1692 | //\r | |
1693 | VolatileVariableStore = AllocateRuntimePool (VARIABLE_STORE_SIZE + SCRATCH_SIZE);\r | |
1694 | if (VolatileVariableStore == NULL) {\r | |
1695 | FreePool (mVariableModuleGlobal);\r | |
1696 | return EFI_OUT_OF_RESOURCES;\r | |
1697 | }\r | |
1698 | \r | |
1699 | SetMem (VolatileVariableStore, VARIABLE_STORE_SIZE + SCRATCH_SIZE, 0xff);\r | |
1700 | \r | |
1701 | //\r | |
1702 | // Variable Specific Data\r | |
1703 | //\r | |
052ad7e1 | 1704 | mVariableModuleGlobal->VariableGlobal.VolatileVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VolatileVariableStore;\r |
9cad030b | 1705 | mVariableModuleGlobal->VolatileLastVariableOffset = (UINTN) GetStartPointer (VolatileVariableStore) - (UINTN) VolatileVariableStore;\r |
8d3a5c82 | 1706 | \r |
1707 | VolatileVariableStore->Signature = VARIABLE_STORE_SIGNATURE;\r | |
1708 | VolatileVariableStore->Size = VARIABLE_STORE_SIZE;\r | |
1709 | VolatileVariableStore->Format = VARIABLE_STORE_FORMATTED;\r | |
1710 | VolatileVariableStore->State = VARIABLE_STORE_HEALTHY;\r | |
1711 | VolatileVariableStore->Reserved = 0;\r | |
1712 | VolatileVariableStore->Reserved1 = 0;\r | |
1713 | \r | |
1714 | //\r | |
1715 | // Get non volatile varaible store\r | |
1716 | //\r | |
1717 | \r | |
1718 | TempVariableStoreHeader = (UINT64) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
052ad7e1 | 1719 | VariableStoreBase = TempVariableStoreHeader + \\r |
8d3a5c82 | 1720 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
052ad7e1 | 1721 | VariableStoreLength = (UINT64) PcdGet32 (PcdFlashNvStorageVariableSize) - \\r |
8d3a5c82 | 1722 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
1723 | //\r | |
1724 | // Mark the variable storage region of the FLASH as RUNTIME\r | |
1725 | //\r | |
052ad7e1 A |
1726 | BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK);\r |
1727 | Length = VariableStoreLength + (VariableStoreBase - BaseAddress);\r | |
8d3a5c82 | 1728 | Length = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK);\r |
1729 | \r | |
1730 | Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);\r | |
1731 | if (EFI_ERROR (Status)) {\r | |
1732 | FreePool (mVariableModuleGlobal);\r | |
1733 | FreePool (VolatileVariableStore);\r | |
1734 | return EFI_UNSUPPORTED;\r | |
1735 | }\r | |
1736 | \r | |
1737 | Status = gDS->SetMemorySpaceAttributes (\r | |
1738 | BaseAddress,\r | |
1739 | Length,\r | |
1740 | GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME\r | |
1741 | );\r | |
1742 | if (EFI_ERROR (Status)) {\r | |
1743 | FreePool (mVariableModuleGlobal);\r | |
1744 | FreePool (VolatileVariableStore);\r | |
1745 | return EFI_UNSUPPORTED;\r | |
1746 | }\r | |
1747 | //\r | |
1748 | // Get address of non volatile variable store base\r | |
1749 | //\r | |
052ad7e1 | 1750 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;\r |
8d3a5c82 | 1751 | \r |
1752 | //\r | |
1753 | // Check Integrity\r | |
1754 | //\r | |
1755 | //\r | |
1756 | // Find the Correct Instance of the FV Block Service.\r | |
1757 | //\r | |
1758 | Instance = 0;\r | |
052ad7e1 | 1759 | CurrPtr = (CHAR8 *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1760 | while (EfiFvbGetPhysicalAddress (Instance, &FvVolHdr) == EFI_SUCCESS) {\r |
1761 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r | |
1762 | if (CurrPtr >= (CHAR8 *) FwVolHeader && CurrPtr < (((CHAR8 *) FwVolHeader) + FwVolHeader->FvLength)) {\r | |
1763 | mVariableModuleGlobal->FvbInstance = Instance;\r | |
1764 | break;\r | |
1765 | }\r | |
1766 | \r | |
1767 | Instance++;\r | |
1768 | }\r | |
1769 | \r | |
1770 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) CurrPtr;\r | |
1771 | if (GetVariableStoreStatus (VariableStoreHeader) == EfiValid) {\r | |
1772 | if (~VariableStoreHeader->Size == 0) {\r | |
1773 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1774 | &mVariableModuleGlobal->VariableGlobal,\r |
8d3a5c82 | 1775 | FALSE,\r |
1776 | FALSE,\r | |
1777 | mVariableModuleGlobal->FvbInstance,\r | |
1778 | (UINTN) &VariableStoreHeader->Size,\r | |
1779 | sizeof (UINT32),\r | |
052ad7e1 | 1780 | (UINT8 *) &VariableStoreLength\r |
8d3a5c82 | 1781 | );\r |
1782 | //\r | |
1783 | // As Variables are stored in NV storage, which are slow devices,such as flash.\r | |
1784 | // Variable operation may skip checking variable program result to improve performance,\r | |
1785 | // We can assume Variable program is OK through some check point.\r | |
1786 | // Variable Store Size Setting should be the first Variable write operation,\r | |
1787 | // We can assume all Read/Write is OK if we can set Variable store size successfully.\r | |
1788 | // If write fail, we will assert here\r | |
1789 | //\r | |
052ad7e1 | 1790 | ASSERT(VariableStoreHeader->Size == VariableStoreLength);\r |
8d3a5c82 | 1791 | \r |
1792 | if (EFI_ERROR (Status)) {\r | |
1793 | return Status;\r | |
1794 | }\r | |
1795 | }\r | |
1796 | \r | |
052ad7e1 | 1797 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = (EFI_PHYSICAL_ADDRESS) ((UINTN) CurrPtr);\r |
8d3a5c82 | 1798 | //\r |
1799 | // Parse non-volatile variable data and get last variable offset\r | |
1800 | //\r | |
9cad030b | 1801 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) CurrPtr);\r |
8d3a5c82 | 1802 | Status = EFI_SUCCESS;\r |
1803 | \r | |
1804 | while (IsValidVariableHeader (NextVariable)) {\r | |
1805 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1806 | }\r | |
1807 | \r | |
1808 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) CurrPtr;\r | |
1809 | \r | |
1810 | //\r | |
1811 | // Check if the free area is blow a threshold\r | |
1812 | //\r | |
1813 | if ((((VARIABLE_STORE_HEADER *)((UINTN) CurrPtr))->Size - mVariableModuleGlobal->NonVolatileLastVariableOffset) < VARIABLE_RECLAIM_THRESHOLD) {\r | |
1814 | Status = Reclaim (\r | |
052ad7e1 | 1815 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r |
8d3a5c82 | 1816 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r |
1817 | FALSE\r | |
1818 | );\r | |
1819 | }\r | |
1820 | \r | |
1821 | if (EFI_ERROR (Status)) {\r | |
1822 | FreePool (mVariableModuleGlobal);\r | |
1823 | FreePool (VolatileVariableStore);\r | |
1824 | return Status;\r | |
1825 | }\r | |
1826 | \r | |
1827 | //\r | |
1828 | // Check if the free area is really free.\r | |
1829 | //\r | |
1830 | for (Index = mVariableModuleGlobal->NonVolatileLastVariableOffset; Index < VariableStoreHeader->Size; Index++) {\r | |
052ad7e1 | 1831 | Data = ((UINT8 *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)[Index];\r |
8d3a5c82 | 1832 | if (Data != 0xff) {\r |
1833 | //\r | |
1834 | // There must be something wrong in variable store, do reclaim operation.\r | |
1835 | //\r | |
1836 | Status = Reclaim (\r | |
052ad7e1 | 1837 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r |
8d3a5c82 | 1838 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r |
1839 | FALSE\r | |
1840 | );\r | |
1841 | break;\r | |
1842 | }\r | |
1843 | }\r | |
1844 | }\r | |
1845 | \r | |
1846 | if (EFI_ERROR (Status)) {\r | |
1847 | FreePool (mVariableModuleGlobal);\r | |
1848 | FreePool (VolatileVariableStore);\r | |
1849 | }\r | |
1850 | \r | |
1851 | return Status;\r | |
1852 | }\r | |
052ad7e1 A |
1853 | \r |
1854 | \r | |
1855 | \r | |
1856 | \r | |
1857 | VOID\r | |
1858 | EFIAPI\r | |
1859 | VariableClassAddressChangeEvent (\r | |
1860 | IN EFI_EVENT Event,\r | |
1861 | IN VOID *Context\r | |
1862 | )\r | |
1863 | {\r | |
1864 | EfiConvertPointer (\r | |
1865 | 0x0,\r | |
1866 | (VOID **) &mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase\r | |
1867 | );\r | |
1868 | EfiConvertPointer (\r | |
1869 | 0x0,\r | |
1870 | (VOID **) &mVariableModuleGlobal->VariableGlobal.VolatileVariableBase\r | |
1871 | );\r | |
1872 | EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);\r | |
1873 | }\r | |
1874 | \r | |
1875 | \r | |
1876 | /**\r | |
1877 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
1878 | runtime services in the EFI System Table and installs arch protocols \r | |
1879 | for variable read and write services being availible. \r | |
1880 | \r | |
1881 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
1882 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
1883 | \r | |
1884 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
1885 | @retval other Some error occurs when executing this entry point.\r | |
1886 | \r | |
1887 | **/\r | |
1888 | EFI_STATUS\r | |
1889 | EFIAPI\r | |
1890 | VariableServiceInitialize (\r | |
1891 | IN EFI_HANDLE ImageHandle,\r | |
1892 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1893 | )\r | |
1894 | {\r | |
1895 | EFI_STATUS Status;\r | |
1896 | \r | |
1897 | Status = VariableCommonInitialize (ImageHandle, SystemTable);\r | |
1898 | ASSERT_EFI_ERROR (Status);\r | |
1899 | \r | |
1900 | SystemTable->RuntimeServices->GetVariable = RuntimeServiceGetVariable;\r | |
1901 | SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
1902 | SystemTable->RuntimeServices->SetVariable = RuntimeServiceSetVariable;\r | |
1903 | SystemTable->RuntimeServices->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
1904 | \r | |
1905 | //\r | |
1906 | // Now install the Variable Runtime Architectural Protocol on a new handle\r | |
1907 | //\r | |
1908 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1909 | &mHandle,\r | |
1910 | &gEfiVariableArchProtocolGuid, NULL,\r | |
1911 | &gEfiVariableWriteArchProtocolGuid, NULL,\r | |
1912 | NULL\r | |
1913 | );\r | |
1914 | ASSERT_EFI_ERROR (Status);\r | |
1915 | \r | |
1916 | Status = gBS->CreateEvent (\r | |
1917 | EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r | |
1918 | TPL_NOTIFY,\r | |
1919 | VariableClassAddressChangeEvent,\r | |
1920 | NULL,\r | |
1921 | &mVirtualAddressChangeEvent\r | |
1922 | );\r | |
1923 | ASSERT_EFI_ERROR (Status);\r | |
1924 | \r | |
1925 | return EFI_SUCCESS;\r | |
1926 | }\r | |
1927 | \r |