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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 | |
8d3a5c82 | 370 | UINT8 *\r |
8d3a5c82 | 371 | GetVariableDataPtr (\r |
372 | IN VARIABLE_HEADER *Variable\r | |
373 | )\r | |
374 | /*++\r | |
375 | \r | |
376 | Routine Description:\r | |
377 | \r | |
378 | This code gets the pointer to the variable data.\r | |
379 | \r | |
380 | Arguments:\r | |
381 | \r | |
382 | Variable Pointer to the Variable Header.\r | |
383 | \r | |
384 | Returns:\r | |
385 | \r | |
386 | UINT8* Pointer to Variable Data\r | |
387 | \r | |
388 | --*/\r | |
389 | {\r | |
390 | //\r | |
391 | // Be careful about pad size for alignment\r | |
392 | //\r | |
ab5f0d6d | 393 | return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + NAMESIZE_OF_VARIABLE (Variable) + GET_PAD_SIZE (NAMESIZE_OF_VARIABLE (Variable)));\r |
8d3a5c82 | 394 | }\r |
395 | \r | |
052ad7e1 | 396 | \r |
8d3a5c82 | 397 | VARIABLE_HEADER *\r |
8d3a5c82 | 398 | GetNextVariablePtr (\r |
399 | IN VARIABLE_HEADER *Variable\r | |
400 | )\r | |
401 | /*++\r | |
402 | \r | |
403 | Routine Description:\r | |
404 | \r | |
405 | This code gets the pointer to the next variable header.\r | |
406 | \r | |
407 | Arguments:\r | |
408 | \r | |
409 | Variable Pointer to the Variable Header.\r | |
410 | \r | |
411 | Returns:\r | |
412 | \r | |
413 | VARIABLE_HEADER* Pointer to next variable header.\r | |
414 | \r | |
415 | --*/\r | |
416 | {\r | |
417 | if (!IsValidVariableHeader (Variable)) {\r | |
418 | return NULL;\r | |
419 | }\r | |
420 | //\r | |
421 | // Be careful about pad size for alignment\r | |
422 | //\r | |
ab5f0d6d | 423 | return (VARIABLE_HEADER *) HEADER_ALIGN (((UINTN) GetVariableDataPtr (Variable) + DATASIZE_OF_VARIABLE (Variable) + GET_PAD_SIZE (DATASIZE_OF_VARIABLE (Variable))));\r |
8d3a5c82 | 424 | }\r |
425 | \r | |
9cad030b | 426 | VARIABLE_HEADER *\r |
427 | GetStartPointer (\r | |
428 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
429 | )\r | |
430 | /*++\r | |
431 | \r | |
432 | Routine Description:\r | |
433 | \r | |
434 | This code gets the pointer to the first variable memory pointer byte\r | |
435 | \r | |
436 | Arguments:\r | |
437 | \r | |
438 | VarStoreHeader Pointer to the Variable Store Header.\r | |
439 | \r | |
440 | Returns:\r | |
441 | \r | |
442 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
443 | \r | |
444 | --*/\r | |
445 | {\r | |
446 | //\r | |
447 | // The end of variable store\r | |
448 | //\r | |
449 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r | |
450 | }\r | |
052ad7e1 | 451 | \r |
8d3a5c82 | 452 | VARIABLE_HEADER *\r |
8d3a5c82 | 453 | GetEndPointer (\r |
454 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
455 | )\r | |
456 | /*++\r | |
457 | \r | |
458 | Routine Description:\r | |
459 | \r | |
460 | This code gets the pointer to the last variable memory pointer byte\r | |
461 | \r | |
462 | Arguments:\r | |
463 | \r | |
464 | VarStoreHeader Pointer to the Variable Store Header.\r | |
465 | \r | |
466 | Returns:\r | |
467 | \r | |
468 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
469 | \r | |
470 | --*/\r | |
471 | {\r | |
472 | //\r | |
473 | // The end of variable store\r | |
474 | //\r | |
9cad030b | 475 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r |
8d3a5c82 | 476 | }\r |
477 | \r | |
052ad7e1 | 478 | \r |
8d3a5c82 | 479 | EFI_STATUS\r |
8d3a5c82 | 480 | Reclaim (\r |
481 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
482 | OUT UINTN *LastVariableOffset,\r | |
483 | IN BOOLEAN IsVolatile\r | |
484 | )\r | |
485 | /*++\r | |
486 | \r | |
487 | Routine Description:\r | |
488 | \r | |
489 | Variable store garbage collection and reclaim operation\r | |
490 | \r | |
491 | Arguments:\r | |
492 | \r | |
493 | VariableBase Base address of variable store\r | |
494 | LastVariableOffset Offset of last variable\r | |
495 | IsVolatile The variable store is volatile or not,\r | |
496 | if it is non-volatile, need FTW\r | |
497 | \r | |
498 | Returns:\r | |
499 | \r | |
500 | EFI STATUS\r | |
501 | \r | |
502 | --*/\r | |
503 | {\r | |
504 | VARIABLE_HEADER *Variable;\r | |
505 | VARIABLE_HEADER *NextVariable;\r | |
506 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
507 | UINT8 *ValidBuffer;\r | |
508 | UINTN ValidBufferSize;\r | |
509 | UINTN VariableSize;\r | |
510 | UINT8 *CurrPtr;\r | |
511 | EFI_STATUS Status;\r | |
512 | \r | |
513 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);\r | |
514 | \r | |
515 | //\r | |
516 | // Start Pointers for the variable.\r | |
517 | //\r | |
9cad030b | 518 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 519 | ValidBufferSize = sizeof (VARIABLE_STORE_HEADER);\r |
520 | \r | |
521 | while (IsValidVariableHeader (Variable)) {\r | |
522 | NextVariable = GetNextVariablePtr (Variable);\r | |
523 | if (Variable->State == VAR_ADDED) {\r | |
524 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
525 | ValidBufferSize += VariableSize;\r | |
526 | }\r | |
527 | \r | |
528 | Variable = NextVariable;\r | |
529 | }\r | |
530 | \r | |
531 | ValidBuffer = AllocatePool (ValidBufferSize);\r | |
532 | if (ValidBuffer == NULL) {\r | |
533 | return EFI_OUT_OF_RESOURCES;\r | |
534 | }\r | |
535 | \r | |
536 | SetMem (ValidBuffer, ValidBufferSize, 0xff);\r | |
537 | \r | |
538 | CurrPtr = ValidBuffer;\r | |
539 | \r | |
540 | //\r | |
541 | // Copy variable store header\r | |
542 | //\r | |
543 | CopyMem (CurrPtr, VariableStoreHeader, sizeof (VARIABLE_STORE_HEADER));\r | |
9cad030b | 544 | CurrPtr = (UINT8 *) GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 545 | \r |
546 | //\r | |
547 | // Start Pointers for the variable.\r | |
548 | //\r | |
9cad030b | 549 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 550 | \r |
551 | while (IsValidVariableHeader (Variable)) {\r | |
552 | NextVariable = GetNextVariablePtr (Variable);\r | |
553 | if (Variable->State == VAR_ADDED) {\r | |
554 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
555 | CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r | |
556 | CurrPtr += VariableSize;\r | |
557 | }\r | |
558 | \r | |
559 | Variable = NextVariable;\r | |
560 | }\r | |
561 | \r | |
562 | if (IsVolatile) {\r | |
563 | //\r | |
564 | // If volatile variable store, just copy valid buffer\r | |
565 | //\r | |
566 | SetMem ((UINT8 *) (UINTN) VariableBase, VariableStoreHeader->Size, 0xff);\r | |
567 | CopyMem ((UINT8 *) (UINTN) VariableBase, ValidBuffer, ValidBufferSize);\r | |
568 | *LastVariableOffset = ValidBufferSize;\r | |
569 | Status = EFI_SUCCESS;\r | |
570 | } else {\r | |
571 | //\r | |
572 | // If non-volatile variable store, perform FTW here.\r | |
573 | //\r | |
574 | Status = FtwVariableSpace (\r | |
575 | VariableBase,\r | |
576 | ValidBuffer,\r | |
577 | ValidBufferSize\r | |
578 | );\r | |
579 | if (!EFI_ERROR (Status)) {\r | |
580 | *LastVariableOffset = ValidBufferSize;\r | |
581 | }\r | |
582 | }\r | |
583 | \r | |
584 | FreePool (ValidBuffer);\r | |
585 | \r | |
586 | if (EFI_ERROR (Status)) {\r | |
587 | *LastVariableOffset = 0;\r | |
588 | }\r | |
589 | \r | |
590 | return Status;\r | |
591 | }\r | |
592 | \r | |
33a5a666 A |
593 | \r |
594 | //\r | |
595 | // The current Hii implementation accesses this variable a larg # of times on every boot.\r | |
596 | // Other common variables are only accessed a single time. This is why this cache algorithm\r | |
597 | // only targets a single variable. Probably to get an performance improvement out of\r | |
598 | // a Cache you would need a cache that improves the search performance for a variable.\r | |
599 | //\r | |
600 | VARIABLE_CACHE_ENTRY mVariableCache[] = {\r | |
601 | {\r | |
602 | &gEfiGlobalVariableGuid,\r | |
603 | L"Lang",\r | |
604 | 0x00000000,\r | |
605 | 0x00,\r | |
606 | NULL\r | |
607 | }\r | |
608 | };\r | |
609 | \r | |
052ad7e1 A |
610 | \r |
611 | /**\r | |
612 | Update the Cache with Variable information. These are the same \r | |
613 | arguments as the EFI Variable services.\r | |
614 | \r | |
615 | @param[in] VariableName Name of variable\r | |
616 | @param[in] VendorGuid Guid of variable\r | |
617 | @param[in] Attribute Attribue of the variable\r | |
618 | @param[in] DataSize Size of data. 0 means delete\r | |
619 | @param[in] Data Variable data\r | |
620 | \r | |
621 | **/\r | |
33a5a666 A |
622 | VOID\r |
623 | UpdateVariableCache (\r | |
624 | IN CHAR16 *VariableName,\r | |
625 | IN EFI_GUID *VendorGuid,\r | |
052ad7e1 A |
626 | IN UINT32 Attributes,\r |
627 | IN UINTN DataSize,\r | |
628 | IN VOID *Data\r | |
33a5a666 A |
629 | )\r |
630 | {\r | |
631 | VARIABLE_CACHE_ENTRY *Entry;\r | |
632 | UINTN Index;\r | |
633 | \r | |
634 | if (EfiAtRuntime ()) {\r | |
635 | // Don't use the cache at runtime\r | |
636 | return;\r | |
637 | }\r | |
638 | \r | |
639 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
640 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
641 | if (StrCmp (VariableName, Entry->Name) == 0) { \r | |
642 | Entry->Attributes = Attributes;\r | |
643 | if (DataSize == 0) {\r | |
644 | // Delete Case\r | |
645 | if (Entry->DataSize != 0) {\r | |
646 | FreePool (Entry->Data);\r | |
647 | }\r | |
648 | Entry->DataSize = DataSize;\r | |
649 | } else if (DataSize == Entry->DataSize) {\r | |
650 | CopyMem (Entry->Data, Data, DataSize);\r | |
651 | } else {\r | |
652 | Entry->Data = AllocatePool (DataSize);\r | |
653 | Entry->DataSize = DataSize;\r | |
654 | CopyMem (Entry->Data, Data, DataSize);\r | |
655 | }\r | |
656 | }\r | |
657 | }\r | |
658 | }\r | |
659 | }\r | |
660 | \r | |
661 | \r | |
052ad7e1 A |
662 | /**\r |
663 | Search the cache to see if the variable is in the cache.\r | |
664 | \r | |
665 | @param[in] VariableName Name of variable\r | |
666 | @param[in] VendorGuid Guid of variable\r | |
667 | @param[in] Attribute Attribue returned \r | |
668 | @param[in] DataSize Size of data returned\r | |
669 | @param[in] Data Variable data returned\r | |
670 | \r | |
671 | @retval EFI_SUCCESS VariableGuid & VariableName data was returned.\r | |
672 | @retval other Not found.\r | |
673 | \r | |
674 | **/\r | |
33a5a666 A |
675 | EFI_STATUS\r |
676 | FindVariableInCache (\r | |
677 | IN CHAR16 *VariableName,\r | |
678 | IN EFI_GUID *VendorGuid,\r | |
679 | OUT UINT32 *Attributes OPTIONAL,\r | |
680 | IN OUT UINTN *DataSize,\r | |
681 | OUT VOID *Data\r | |
682 | )\r | |
683 | {\r | |
684 | VARIABLE_CACHE_ENTRY *Entry;\r | |
685 | UINTN Index;\r | |
686 | \r | |
687 | if (EfiAtRuntime ()) {\r | |
688 | // Don't use the cache at runtime\r | |
689 | return EFI_NOT_FOUND;\r | |
690 | }\r | |
691 | \r | |
692 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
693 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
694 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
695 | if (Entry->DataSize == 0) {\r | |
052ad7e1 | 696 | // Variable was deleted so return not found\r |
33a5a666 | 697 | return EFI_NOT_FOUND;\r |
aa09397b | 698 | } else if (Entry->DataSize > *DataSize) {\r |
052ad7e1 | 699 | // If the buffer is too small return correct size\r |
33a5a666 A |
700 | *DataSize = Entry->DataSize;\r |
701 | return EFI_BUFFER_TOO_SMALL;\r | |
702 | } else {\r | |
aa09397b | 703 | *DataSize = Entry->DataSize;\r |
052ad7e1 | 704 | // Return the data\r |
33a5a666 A |
705 | CopyMem (Data, Entry->Data, Entry->DataSize);\r |
706 | if (Attributes != NULL) {\r | |
707 | *Attributes = Entry->Attributes;\r | |
708 | }\r | |
709 | return EFI_SUCCESS;\r | |
710 | }\r | |
711 | }\r | |
712 | }\r | |
713 | }\r | |
714 | \r | |
715 | return EFI_NOT_FOUND;\r | |
716 | }\r | |
717 | \r | |
718 | \r | |
8d3a5c82 | 719 | EFI_STATUS\r |
8d3a5c82 | 720 | FindVariable (\r |
721 | IN CHAR16 *VariableName,\r | |
722 | IN EFI_GUID *VendorGuid,\r | |
723 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
724 | IN VARIABLE_GLOBAL *Global\r | |
725 | )\r | |
726 | /*++\r | |
727 | \r | |
728 | Routine Description:\r | |
729 | \r | |
730 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
731 | \r | |
732 | Arguments:\r | |
733 | \r | |
734 | VariableName Name of the variable to be found\r | |
735 | VendorGuid Vendor GUID to be found.\r | |
736 | PtrTrack Variable Track Pointer structure that contains\r | |
737 | Variable Information.\r | |
738 | Contains the pointer of Variable header.\r | |
739 | Global VARIABLE_GLOBAL pointer\r | |
740 | \r | |
741 | Returns:\r | |
742 | \r | |
743 | EFI STATUS\r | |
744 | \r | |
745 | --*/\r | |
746 | {\r | |
747 | VARIABLE_HEADER *Variable[2];\r | |
748 | VARIABLE_STORE_HEADER *VariableStoreHeader[2];\r | |
749 | UINTN Index;\r | |
750 | \r | |
8d3a5c82 | 751 | //\r |
33a5a666 | 752 | // 0: Volatile, 1: Non-Volatile\r |
36873a61 | 753 | // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName\r |
754 | // make use of this mapping to implement search algorithme.\r | |
8d3a5c82 | 755 | //\r |
052ad7e1 A |
756 | VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
757 | VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r | |
8d3a5c82 | 758 | \r |
759 | //\r | |
760 | // Start Pointers for the variable.\r | |
761 | // Actual Data Pointer where data can be written.\r | |
762 | //\r | |
9cad030b | 763 | Variable[0] = GetStartPointer (VariableStoreHeader[0]);\r |
764 | Variable[1] = GetStartPointer (VariableStoreHeader[1]);\r | |
8d3a5c82 | 765 | \r |
766 | if (VariableName[0] != 0 && VendorGuid == NULL) {\r | |
767 | return EFI_INVALID_PARAMETER;\r | |
768 | }\r | |
769 | //\r | |
33a5a666 | 770 | // Find the variable by walk through volatile and then non-volatile variable store\r |
8d3a5c82 | 771 | //\r |
772 | for (Index = 0; Index < 2; Index++) {\r | |
9cad030b | 773 | PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Index]);\r |
8d3a5c82 | 774 | PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);\r |
775 | \r | |
776 | while (IsValidVariableHeader (Variable[Index]) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {\r | |
777 | if (Variable[Index]->State == VAR_ADDED) {\r | |
c6492839 | 778 | if (!EfiAtRuntime () || (Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r |
8d3a5c82 | 779 | if (VariableName[0] == 0) {\r |
780 | PtrTrack->CurrPtr = Variable[Index];\r | |
33a5a666 | 781 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 782 | return EFI_SUCCESS;\r |
783 | } else {\r | |
784 | if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {\r | |
ab5f0d6d | 785 | ASSERT (NAMESIZE_OF_VARIABLE (Variable[Index]) != 0);\r |
786 | if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), NAMESIZE_OF_VARIABLE (Variable[Index]))) {\r | |
8d3a5c82 | 787 | PtrTrack->CurrPtr = Variable[Index];\r |
33a5a666 | 788 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 789 | return EFI_SUCCESS;\r |
790 | }\r | |
791 | }\r | |
792 | }\r | |
793 | }\r | |
794 | }\r | |
795 | \r | |
796 | Variable[Index] = GetNextVariablePtr (Variable[Index]);\r | |
797 | }\r | |
8d3a5c82 | 798 | }\r |
8d3a5c82 | 799 | PtrTrack->CurrPtr = NULL;\r |
800 | return EFI_NOT_FOUND;\r | |
801 | }\r | |
802 | \r | |
33a5a666 | 803 | \r |
052ad7e1 | 804 | \r |
8d3a5c82 | 805 | /*++\r |
806 | \r | |
807 | Routine Description:\r | |
808 | \r | |
809 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
810 | \r | |
811 | Arguments:\r | |
812 | \r | |
c6492839 | 813 | VariableName Name of Variable to be found\r |
814 | VendorGuid Variable vendor GUID\r | |
815 | Attributes OPTIONAL Attribute value of the variable found\r | |
816 | DataSize Size of Data found. If size is less than the\r | |
817 | data, this value contains the required size.\r | |
818 | Data Data pointer\r | |
819 | Global Pointer to VARIABLE_GLOBAL structure\r | |
820 | Instance Instance of the Firmware Volume.\r | |
8d3a5c82 | 821 | \r |
822 | Returns:\r | |
823 | \r | |
c6492839 | 824 | EFI_INVALID_PARAMETER - Invalid parameter\r |
825 | EFI_SUCCESS - Find the specified variable\r | |
826 | EFI_NOT_FOUND - Not found\r | |
827 | EFI_BUFFER_TO_SMALL - DataSize is too small for the result\r | |
828 | \r | |
8d3a5c82 | 829 | \r |
830 | --*/\r | |
052ad7e1 A |
831 | EFI_STATUS\r |
832 | EFIAPI\r | |
833 | RuntimeServiceGetVariable (\r | |
834 | IN CHAR16 *VariableName,\r | |
835 | IN EFI_GUID *VendorGuid,\r | |
836 | OUT UINT32 *Attributes OPTIONAL,\r | |
837 | IN OUT UINTN *DataSize,\r | |
838 | OUT VOID *Data\r | |
839 | )\r | |
8d3a5c82 | 840 | {\r |
052ad7e1 | 841 | EFI_STATUS Status;\r |
8d3a5c82 | 842 | VARIABLE_POINTER_TRACK Variable;\r |
843 | UINTN VarDataSize;\r | |
8d3a5c82 | 844 | \r |
845 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
846 | return EFI_INVALID_PARAMETER;\r | |
847 | }\r | |
33a5a666 | 848 | \r |
fdb7765f | 849 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
850 | \r | |
8d3a5c82 | 851 | //\r |
852 | // Find existing variable\r | |
853 | //\r | |
33a5a666 A |
854 | Status = FindVariableInCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
855 | if ((Status == EFI_BUFFER_TOO_SMALL) || (Status == EFI_SUCCESS)){\r | |
856 | // Hit in the Cache\r | |
857 | UpdateVariableInfo (VariableName, VendorGuid, FALSE, TRUE, FALSE, FALSE, TRUE);\r | |
fdb7765f | 858 | goto Done;\r |
33a5a666 A |
859 | }\r |
860 | \r | |
052ad7e1 | 861 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 862 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
863 | goto Done;\r | |
864 | }\r | |
33a5a666 | 865 | \r |
8d3a5c82 | 866 | //\r |
867 | // Get data size\r | |
868 | //\r | |
ab5f0d6d | 869 | VarDataSize = DATASIZE_OF_VARIABLE (Variable.CurrPtr);\r |
fdb7765f | 870 | ASSERT (VarDataSize != 0);\r |
871 | \r | |
8d3a5c82 | 872 | if (*DataSize >= VarDataSize) {\r |
873 | if (Data == NULL) {\r | |
874 | Status = EFI_INVALID_PARAMETER;\r | |
875 | goto Done;\r | |
876 | }\r | |
877 | \r | |
878 | CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r | |
879 | if (Attributes != NULL) {\r | |
880 | *Attributes = Variable.CurrPtr->Attributes;\r | |
881 | }\r | |
882 | \r | |
883 | *DataSize = VarDataSize;\r | |
33a5a666 A |
884 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r |
885 | UpdateVariableCache (VariableName, VendorGuid, Variable.CurrPtr->Attributes, VarDataSize, Data);\r | |
886 | \r | |
8d3a5c82 | 887 | Status = EFI_SUCCESS;\r |
888 | goto Done;\r | |
889 | } else {\r | |
890 | *DataSize = VarDataSize;\r | |
891 | Status = EFI_BUFFER_TOO_SMALL;\r | |
892 | goto Done;\r | |
893 | }\r | |
894 | \r | |
895 | Done:\r | |
052ad7e1 | 896 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 897 | return Status;\r |
898 | }\r | |
899 | \r | |
052ad7e1 A |
900 | \r |
901 | \r | |
8d3a5c82 | 902 | /*++\r |
903 | \r | |
904 | Routine Description:\r | |
905 | \r | |
906 | This code Finds the Next available variable\r | |
907 | \r | |
908 | Arguments:\r | |
909 | \r | |
910 | VariableNameSize Size of the variable\r | |
911 | VariableName Pointer to variable name\r | |
912 | VendorGuid Variable Vendor Guid\r | |
913 | Global VARIABLE_GLOBAL structure pointer.\r | |
914 | Instance FV instance\r | |
915 | \r | |
916 | Returns:\r | |
917 | \r | |
918 | EFI STATUS\r | |
919 | \r | |
920 | --*/\r | |
052ad7e1 A |
921 | EFI_STATUS\r |
922 | EFIAPI\r | |
923 | RuntimeServiceGetNextVariableName (\r | |
924 | IN OUT UINTN *VariableNameSize,\r | |
925 | IN OUT CHAR16 *VariableName,\r | |
926 | IN OUT EFI_GUID *VendorGuid\r | |
927 | )\r | |
8d3a5c82 | 928 | {\r |
929 | VARIABLE_POINTER_TRACK Variable;\r | |
930 | UINTN VarNameSize;\r | |
931 | EFI_STATUS Status;\r | |
932 | \r | |
933 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
934 | return EFI_INVALID_PARAMETER;\r | |
935 | }\r | |
936 | \r | |
fdb7765f | 937 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
938 | \r | |
052ad7e1 | 939 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 940 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
941 | goto Done;\r | |
942 | }\r | |
943 | \r | |
944 | if (VariableName[0] != 0) {\r | |
945 | //\r | |
946 | // If variable name is not NULL, get next variable\r | |
947 | //\r | |
948 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
949 | }\r | |
950 | \r | |
951 | while (TRUE) {\r | |
952 | //\r | |
953 | // If both volatile and non-volatile variable store are parsed,\r | |
954 | // return not found\r | |
955 | //\r | |
956 | if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r | |
957 | Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r | |
36873a61 | 958 | if (!Variable.Volatile) {\r |
9cad030b | 959 | Variable.StartPtr = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
960 | Variable.EndPtr = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase));\r | |
8d3a5c82 | 961 | } else {\r |
962 | Status = EFI_NOT_FOUND;\r | |
963 | goto Done;\r | |
964 | }\r | |
965 | \r | |
966 | Variable.CurrPtr = Variable.StartPtr;\r | |
967 | if (!IsValidVariableHeader (Variable.CurrPtr)) {\r | |
968 | continue;\r | |
969 | }\r | |
970 | }\r | |
971 | //\r | |
972 | // Variable is found\r | |
973 | //\r | |
974 | if (IsValidVariableHeader (Variable.CurrPtr) && Variable.CurrPtr->State == VAR_ADDED) {\r | |
975 | if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {\r | |
ab5f0d6d | 976 | VarNameSize = NAMESIZE_OF_VARIABLE (Variable.CurrPtr);\r |
fdb7765f | 977 | ASSERT (VarNameSize != 0);\r |
978 | \r | |
8d3a5c82 | 979 | if (VarNameSize <= *VariableNameSize) {\r |
980 | CopyMem (\r | |
981 | VariableName,\r | |
982 | GET_VARIABLE_NAME_PTR (Variable.CurrPtr),\r | |
983 | VarNameSize\r | |
984 | );\r | |
985 | CopyMem (\r | |
986 | VendorGuid,\r | |
987 | &Variable.CurrPtr->VendorGuid,\r | |
988 | sizeof (EFI_GUID)\r | |
989 | );\r | |
990 | Status = EFI_SUCCESS;\r | |
991 | } else {\r | |
992 | Status = EFI_BUFFER_TOO_SMALL;\r | |
993 | }\r | |
994 | \r | |
995 | *VariableNameSize = VarNameSize;\r | |
996 | goto Done;\r | |
997 | }\r | |
998 | }\r | |
999 | \r | |
1000 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
1001 | }\r | |
1002 | \r | |
1003 | Done:\r | |
052ad7e1 | 1004 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1005 | return Status;\r |
1006 | }\r | |
1007 | \r | |
052ad7e1 | 1008 | \r |
8d3a5c82 | 1009 | /*++\r |
1010 | \r | |
1011 | Routine Description:\r | |
1012 | \r | |
1013 | This code sets variable in storage blocks (Volatile or Non-Volatile)\r | |
1014 | \r | |
1015 | Arguments:\r | |
1016 | \r | |
1017 | VariableName Name of Variable to be found\r | |
1018 | VendorGuid Variable vendor GUID\r | |
1019 | Attributes Attribute value of the variable found\r | |
1020 | DataSize Size of Data found. If size is less than the\r | |
1021 | data, this value contains the required size.\r | |
1022 | Data Data pointer\r | |
1023 | Global Pointer to VARIABLE_GLOBAL structure\r | |
1024 | VolatileOffset The offset of last volatile variable\r | |
1025 | NonVolatileOffset The offset of last non-volatile variable\r | |
1026 | Instance Instance of the Firmware Volume.\r | |
1027 | \r | |
1028 | Returns:\r | |
1029 | \r | |
8d3a5c82 | 1030 | EFI_INVALID_PARAMETER - Invalid parameter\r |
1031 | EFI_SUCCESS - Set successfully\r | |
1032 | EFI_OUT_OF_RESOURCES - Resource not enough to set variable\r | |
1033 | EFI_NOT_FOUND - Not found\r | |
c6492839 | 1034 | EFI_DEVICE_ERROR - Variable can not be saved due to hardware failure\r |
1035 | EFI_WRITE_PROTECTED - Variable is read-only\r | |
8d3a5c82 | 1036 | \r |
1037 | --*/\r | |
052ad7e1 A |
1038 | EFI_STATUS\r |
1039 | EFIAPI\r | |
1040 | RuntimeServiceSetVariable (\r | |
1041 | IN CHAR16 *VariableName,\r | |
1042 | IN EFI_GUID *VendorGuid,\r | |
1043 | IN UINT32 Attributes,\r | |
1044 | IN UINTN DataSize,\r | |
1045 | IN VOID *Data\r | |
1046 | )\r | |
8d3a5c82 | 1047 | {\r |
1048 | VARIABLE_POINTER_TRACK Variable;\r | |
1049 | EFI_STATUS Status;\r | |
1050 | VARIABLE_HEADER *NextVariable;\r | |
1051 | UINTN VarNameSize;\r | |
1052 | UINTN VarNameOffset;\r | |
1053 | UINTN VarDataOffset;\r | |
1054 | UINTN VarSize;\r | |
1055 | UINT8 State;\r | |
1056 | BOOLEAN Reclaimed;\r | |
052ad7e1 A |
1057 | UINTN *VolatileOffset;\r |
1058 | UINTN *NonVolatileOffset;\r | |
1059 | UINT32 Instance;\r | |
fd51bf70 | 1060 | BOOLEAN Volatile;\r |
fdb7765f | 1061 | EFI_PHYSICAL_ADDRESS Point;\r |
8d3a5c82 | 1062 | \r |
c6492839 | 1063 | //\r |
1064 | // Check input parameters\r | |
1065 | //\r | |
8d3a5c82 | 1066 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r |
1067 | return EFI_INVALID_PARAMETER;\r | |
c6492839 | 1068 | } \r |
1069 | //\r | |
1070 | // Make sure if runtime bit is set, boot service bit is set also\r | |
1071 | //\r | |
1072 | if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r | |
1073 | return EFI_INVALID_PARAMETER;\r | |
8d3a5c82 | 1074 | }\r |
fdb7765f | 1075 | \r |
c6492839 | 1076 | //\r |
1077 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1078 | // the DataSize is limited to maximum size of MAX_HARDWARE_ERROR_VARIABLE_SIZE (32K)\r | |
1079 | // bytes for HwErrRec, and MAX_VARIABLE_SIZE (1024) bytes for the others.\r | |
1080 | //\r | |
1081 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1082 | if ((DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE) || \r | |
1083 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE)) {\r | |
1084 | return EFI_INVALID_PARAMETER;\r | |
1085 | } \r | |
1086 | } else {\r | |
1087 | //\r | |
1088 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1089 | // the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.\r | |
1090 | //\r | |
1091 | if ((DataSize > MAX_VARIABLE_SIZE) ||\r | |
1092 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_VARIABLE_SIZE)) {\r | |
1093 | return EFI_INVALID_PARAMETER;\r | |
1094 | } \r | |
1095 | } \r | |
fdb7765f | 1096 | \r |
1097 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1098 | \r | |
1099 | Reclaimed = FALSE;\r | |
1100 | Instance = mVariableModuleGlobal->FvbInstance;\r | |
1101 | VolatileOffset = &mVariableModuleGlobal->VolatileLastVariableOffset;\r | |
1102 | \r | |
1103 | //\r | |
1104 | // Consider reentrant in MCA/INIT/NMI. It needs be reupdated;\r | |
1105 | //\r | |
1106 | if (1 < InterlockedIncrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState)) {\r | |
fdb7765f | 1107 | Point = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;;\r |
1108 | //\r | |
1109 | // Parse non-volatile variable data and get last variable offset\r | |
1110 | //\r | |
9cad030b | 1111 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point);\r |
fdb7765f | 1112 | while (IsValidVariableHeader (NextVariable)) {\r |
1113 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1114 | }\r | |
1115 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) Point;\r | |
1116 | }\r | |
1117 | \r | |
1118 | NonVolatileOffset = &mVariableModuleGlobal->NonVolatileLastVariableOffset;\r | |
1119 | \r | |
1120 | \r | |
c6492839 | 1121 | //\r |
1122 | // Check whether the input variable is already existed\r | |
1123 | //\r | |
1124 | \r | |
052ad7e1 | 1125 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
c6492839 | 1126 | if (Status == EFI_SUCCESS && Variable.CurrPtr != NULL) {\r |
8d3a5c82 | 1127 | //\r |
c6492839 | 1128 | // Update/Delete existing variable\r |
8d3a5c82 | 1129 | //\r |
fd51bf70 | 1130 | Volatile = Variable.Volatile;\r |
c6492839 | 1131 | \r |
1132 | if (EfiAtRuntime ()) { \r | |
1133 | //\r | |
1134 | // If EfiAtRuntime and the variable is Volatile and Runtime Access, \r | |
1135 | // the volatile is ReadOnly, and SetVariable should be aborted and \r | |
1136 | // return EFI_WRITE_PROTECTED.\r | |
1137 | //\r | |
1138 | if (Variable.Volatile) {\r | |
1139 | Status = EFI_WRITE_PROTECTED;\r | |
1140 | goto Done;\r | |
1141 | }\r | |
1142 | //\r | |
1143 | // Only variable have NV attribute can be updated/deleted in Runtime\r | |
1144 | //\r | |
1145 | if (!(Variable.CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE)) {\r | |
1146 | Status = EFI_INVALID_PARAMETER;\r | |
1147 | goto Done; \r | |
1148 | }\r | |
1149 | }\r | |
8d3a5c82 | 1150 | //\r |
c6492839 | 1151 | // Setting a data variable with no access, or zero DataSize attributes\r |
1152 | // specified causes it to be deleted.\r | |
8d3a5c82 | 1153 | //\r |
c6492839 | 1154 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) { \r |
1155 | State = Variable.CurrPtr->State;\r | |
1156 | State &= VAR_DELETED;\r | |
1157 | \r | |
1158 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1159 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1160 | Variable.Volatile,\r |
1161 | FALSE,\r | |
1162 | Instance,\r | |
1163 | (UINTN) &Variable.CurrPtr->State,\r | |
1164 | sizeof (UINT8),\r | |
1165 | &State\r | |
1166 | ); \r | |
33a5a666 | 1167 | if (!EFI_ERROR (Status)) {\r |
fd51bf70 | 1168 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, FALSE, TRUE, FALSE);\r |
33a5a666 A |
1169 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1170 | }\r | |
c6492839 | 1171 | goto Done; \r |
1172 | }\r | |
8d3a5c82 | 1173 | //\r |
c6492839 | 1174 | // If the variable is marked valid and the same data has been passed in\r |
1175 | // then return to the caller immediately.\r | |
8d3a5c82 | 1176 | //\r |
ab5f0d6d | 1177 | if (DATASIZE_OF_VARIABLE (Variable.CurrPtr) == DataSize &&\r |
c6492839 | 1178 | (CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize) == 0)) {\r |
33a5a666 | 1179 | \r |
fd51bf70 | 1180 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
c6492839 | 1181 | Status = EFI_SUCCESS;\r |
1182 | goto Done;\r | |
1183 | } else if ((Variable.CurrPtr->State == VAR_ADDED) ||\r | |
1184 | (Variable.CurrPtr->State == (VAR_ADDED & VAR_IN_DELETED_TRANSITION))) {\r | |
1185 | //\r | |
1186 | // Mark the old variable as in delete transition\r | |
1187 | //\r | |
1188 | State = Variable.CurrPtr->State;\r | |
1189 | State &= VAR_IN_DELETED_TRANSITION;\r | |
1190 | \r | |
1191 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1192 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1193 | Variable.Volatile,\r |
1194 | FALSE,\r | |
1195 | Instance,\r | |
1196 | (UINTN) &Variable.CurrPtr->State,\r | |
1197 | sizeof (UINT8),\r | |
1198 | &State\r | |
1199 | ); \r | |
1200 | if (EFI_ERROR (Status)) {\r | |
1201 | goto Done; \r | |
33a5a666 | 1202 | } \r |
c6492839 | 1203 | } \r |
1204 | } else if (Status == EFI_NOT_FOUND) {\r | |
8d3a5c82 | 1205 | //\r |
c6492839 | 1206 | // Create a new variable\r |
1207 | // \r | |
1208 | \r | |
8d3a5c82 | 1209 | //\r |
c6492839 | 1210 | // Make sure we are trying to create a new variable.\r |
1211 | // Setting a data variable with no access, or zero DataSize attributes means to delete it. \r | |
8d3a5c82 | 1212 | //\r |
c6492839 | 1213 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r |
1214 | Status = EFI_NOT_FOUND;\r | |
1215 | goto Done;\r | |
1216 | }\r | |
1217 | \r | |
8d3a5c82 | 1218 | //\r |
c6492839 | 1219 | // Only variable have NV|RT attribute can be created in Runtime\r |
1220 | //\r | |
1221 | if (EfiAtRuntime () &&\r | |
1222 | (!(Attributes & EFI_VARIABLE_RUNTIME_ACCESS) || !(Attributes & EFI_VARIABLE_NON_VOLATILE))) {\r | |
1223 | Status = EFI_INVALID_PARAMETER;\r | |
1224 | goto Done;\r | |
1225 | } \r | |
1226 | } else {\r | |
8d3a5c82 | 1227 | //\r |
c6492839 | 1228 | // Status should be EFI_INVALID_PARAMETER here according to return status of FindVariable().\r |
8d3a5c82 | 1229 | //\r |
c6492839 | 1230 | ASSERT (Status == EFI_INVALID_PARAMETER);\r |
8d3a5c82 | 1231 | goto Done;\r |
c6492839 | 1232 | }\r |
1233 | \r | |
1234 | //\r | |
1235 | // Function part - create a new variable and copy the data.\r | |
1236 | // Both update a variable and create a variable will come here.\r | |
1237 | //\r | |
1238 | // Tricky part: Use scratch data area at the end of volatile variable store\r | |
1239 | // as a temporary storage.\r | |
1240 | //\r | |
052ad7e1 | 1241 | NextVariable = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r |
c6492839 | 1242 | \r |
1243 | SetMem (NextVariable, SCRATCH_SIZE, 0xff);\r | |
1244 | \r | |
1245 | NextVariable->StartId = VARIABLE_DATA;\r | |
1246 | NextVariable->Attributes = Attributes;\r | |
1247 | //\r | |
1248 | // NextVariable->State = VAR_ADDED;\r | |
1249 | //\r | |
1250 | NextVariable->Reserved = 0;\r | |
1251 | VarNameOffset = sizeof (VARIABLE_HEADER);\r | |
1252 | VarNameSize = StrSize (VariableName);\r | |
1253 | CopyMem (\r | |
1254 | (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r | |
1255 | VariableName,\r | |
1256 | VarNameSize\r | |
1257 | );\r | |
1258 | VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
1259 | CopyMem (\r | |
1260 | (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r | |
1261 | Data,\r | |
1262 | DataSize\r | |
1263 | );\r | |
1264 | CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r | |
1265 | //\r | |
1266 | // There will be pad bytes after Data, the NextVariable->NameSize and\r | |
1267 | // NextVariable->DataSize should not include pad size so that variable\r | |
1268 | // service can get actual size in GetVariable\r | |
1269 | //\r | |
1270 | NextVariable->NameSize = (UINT32)VarNameSize;\r | |
1271 | NextVariable->DataSize = (UINT32)DataSize;\r | |
1272 | \r | |
1273 | //\r | |
1274 | // The actual size of the variable that stores in storage should\r | |
1275 | // include pad size.\r | |
1276 | //\r | |
1277 | VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);\r | |
1278 | if (Attributes & EFI_VARIABLE_NON_VOLATILE) {\r | |
8d3a5c82 | 1279 | //\r |
c6492839 | 1280 | // Create a nonvolatile variable\r |
8d3a5c82 | 1281 | //\r |
fd51bf70 | 1282 | Volatile = FALSE;\r |
c6492839 | 1283 | \r |
1284 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r | |
052ad7e1 | 1285 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
c6492839 | 1286 | ) {\r |
1287 | if (EfiAtRuntime ()) {\r | |
1288 | Status = EFI_OUT_OF_RESOURCES;\r | |
1289 | goto Done;\r | |
1290 | }\r | |
1291 | //\r | |
1292 | // Perform garbage collection & reclaim operation\r | |
1293 | //\r | |
052ad7e1 | 1294 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase, NonVolatileOffset, FALSE);\r |
8d3a5c82 | 1295 | if (EFI_ERROR (Status)) {\r |
1296 | goto Done;\r | |
1297 | }\r | |
8d3a5c82 | 1298 | //\r |
c6492839 | 1299 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1300 | //\r |
c6492839 | 1301 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r |
052ad7e1 | 1302 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
8d3a5c82 | 1303 | ) {\r |
c6492839 | 1304 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1305 | goto Done;\r |
8d3a5c82 | 1306 | }\r |
c6492839 | 1307 | \r |
1308 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1309 | }\r |
1310 | //\r | |
c6492839 | 1311 | // Three steps\r |
1312 | // 1. Write variable header\r | |
1313 | // 2. Write variable data\r | |
1314 | // 3. Set variable state to valid\r | |
8d3a5c82 | 1315 | //\r |
8d3a5c82 | 1316 | //\r |
c6492839 | 1317 | // Step 1:\r |
8d3a5c82 | 1318 | //\r |
c6492839 | 1319 | Status = UpdateVariableStore (\r |
052ad7e1 | 1320 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1321 | FALSE,\r |
1322 | TRUE,\r | |
1323 | Instance,\r | |
1324 | *NonVolatileOffset,\r | |
1325 | sizeof (VARIABLE_HEADER),\r | |
1326 | (UINT8 *) NextVariable\r | |
1327 | );\r | |
1328 | \r | |
1329 | if (EFI_ERROR (Status)) {\r | |
1330 | goto Done;\r | |
1331 | }\r | |
8d3a5c82 | 1332 | //\r |
c6492839 | 1333 | // Step 2:\r |
8d3a5c82 | 1334 | //\r |
c6492839 | 1335 | Status = UpdateVariableStore (\r |
052ad7e1 | 1336 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1337 | FALSE,\r |
1338 | TRUE,\r | |
1339 | Instance,\r | |
1340 | *NonVolatileOffset + sizeof (VARIABLE_HEADER),\r | |
1341 | (UINT32) VarSize - sizeof (VARIABLE_HEADER),\r | |
1342 | (UINT8 *) NextVariable + sizeof (VARIABLE_HEADER)\r | |
1343 | );\r | |
1344 | \r | |
1345 | if (EFI_ERROR (Status)) {\r | |
1346 | goto Done;\r | |
1347 | }\r | |
8d3a5c82 | 1348 | //\r |
c6492839 | 1349 | // Step 3:\r |
8d3a5c82 | 1350 | //\r |
c6492839 | 1351 | NextVariable->State = VAR_ADDED;\r |
1352 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1353 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1354 | FALSE,\r |
1355 | TRUE,\r | |
1356 | Instance,\r | |
1357 | *NonVolatileOffset,\r | |
1358 | sizeof (VARIABLE_HEADER),\r | |
1359 | (UINT8 *) NextVariable\r | |
1360 | );\r | |
1361 | \r | |
1362 | if (EFI_ERROR (Status)) {\r | |
1363 | goto Done;\r | |
1364 | }\r | |
8d3a5c82 | 1365 | \r |
9cad030b | 1366 | *NonVolatileOffset = HEADER_ALIGN (*NonVolatileOffset + VarSize);\r |
8d3a5c82 | 1367 | \r |
c6492839 | 1368 | } else {\r |
1369 | //\r | |
1370 | // Create a volatile variable\r | |
1371 | // \r | |
fd51bf70 | 1372 | Volatile = TRUE;\r |
c6492839 | 1373 | \r |
1374 | if ((UINT32) (VarSize +*VolatileOffset) >\r | |
052ad7e1 | 1375 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size) {\r |
8d3a5c82 | 1376 | //\r |
c6492839 | 1377 | // Perform garbage collection & reclaim operation\r |
8d3a5c82 | 1378 | //\r |
052ad7e1 | 1379 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase, VolatileOffset, TRUE);\r |
8d3a5c82 | 1380 | if (EFI_ERROR (Status)) {\r |
1381 | goto Done;\r | |
1382 | }\r | |
1383 | //\r | |
c6492839 | 1384 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1385 | //\r |
8d3a5c82 | 1386 | if ((UINT32) (VarSize +*VolatileOffset) >\r |
052ad7e1 | 1387 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size\r |
8d3a5c82 | 1388 | ) {\r |
c6492839 | 1389 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1390 | goto Done;\r |
1391 | }\r | |
c6492839 | 1392 | \r |
1393 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1394 | }\r |
8d3a5c82 | 1395 | \r |
c6492839 | 1396 | NextVariable->State = VAR_ADDED;\r |
1397 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1398 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1399 | TRUE,\r |
1400 | TRUE,\r | |
1401 | Instance,\r | |
1402 | *VolatileOffset,\r | |
1403 | (UINT32) VarSize,\r | |
1404 | (UINT8 *) NextVariable\r | |
1405 | );\r | |
1406 | \r | |
1407 | if (EFI_ERROR (Status)) {\r | |
1408 | goto Done;\r | |
8d3a5c82 | 1409 | }\r |
c6492839 | 1410 | \r |
9cad030b | 1411 | *VolatileOffset = HEADER_ALIGN (*VolatileOffset + VarSize);\r |
c6492839 | 1412 | }\r |
1413 | //\r | |
1414 | // Mark the old variable as deleted\r | |
1415 | //\r | |
1416 | if (!Reclaimed && !EFI_ERROR (Status) && Variable.CurrPtr != NULL) {\r | |
1417 | State = Variable.CurrPtr->State;\r | |
1418 | State &= VAR_DELETED;\r | |
1419 | \r | |
1420 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1421 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1422 | Variable.Volatile,\r |
1423 | FALSE,\r | |
1424 | Instance,\r | |
1425 | (UINTN) &Variable.CurrPtr->State,\r | |
1426 | sizeof (UINT8),\r | |
1427 | &State\r | |
1428 | );\r | |
33a5a666 A |
1429 | \r |
1430 | if (!EFI_ERROR (Status)) {\r | |
fd51bf70 | 1431 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1432 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1433 | }\r | |
c6492839 | 1434 | goto Done; \r |
8d3a5c82 | 1435 | }\r |
1436 | \r | |
1437 | Status = EFI_SUCCESS;\r | |
fd51bf70 | 1438 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1439 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1440 | \r | |
8d3a5c82 | 1441 | Done:\r |
fdb7765f | 1442 | InterlockedDecrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState);\r |
052ad7e1 | 1443 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
fdb7765f | 1444 | \r |
8d3a5c82 | 1445 | return Status;\r |
1446 | }\r | |
1447 | \r | |
052ad7e1 | 1448 | \r |
8d3a5c82 | 1449 | /*++\r |
1450 | \r | |
1451 | Routine Description:\r | |
1452 | \r | |
1453 | This code returns information about the EFI variables.\r | |
1454 | \r | |
1455 | Arguments:\r | |
1456 | \r | |
1457 | Attributes Attributes bitmask to specify the type of variables\r | |
1458 | on which to return information.\r | |
1459 | MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
1460 | for the EFI variables associated with the attributes specified.\r | |
1461 | RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
c6492839 | 1462 | for EFI variables associated with the attributes specified.\r |
1463 | MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
8d3a5c82 | 1464 | associated with the attributes specified.\r |
1465 | Global Pointer to VARIABLE_GLOBAL structure.\r | |
1466 | Instance Instance of the Firmware Volume.\r | |
1467 | \r | |
1468 | Returns:\r | |
1469 | \r | |
1470 | EFI STATUS\r | |
1471 | EFI_INVALID_PARAMETER - An invalid combination of attribute bits was supplied.\r | |
1472 | EFI_SUCCESS - Query successfully.\r | |
1473 | EFI_UNSUPPORTED - The attribute is not supported on this platform.\r | |
1474 | \r | |
1475 | --*/\r | |
052ad7e1 A |
1476 | EFI_STATUS\r |
1477 | EFIAPI\r | |
1478 | RuntimeServiceQueryVariableInfo (\r | |
1479 | IN UINT32 Attributes,\r | |
1480 | OUT UINT64 *MaximumVariableStorageSize,\r | |
1481 | OUT UINT64 *RemainingVariableStorageSize,\r | |
1482 | OUT UINT64 *MaximumVariableSize\r | |
1483 | )\r | |
8d3a5c82 | 1484 | {\r |
1485 | VARIABLE_HEADER *Variable;\r | |
1486 | VARIABLE_HEADER *NextVariable;\r | |
1487 | UINT64 VariableSize;\r | |
1488 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1489 | \r | |
c6492839 | 1490 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
8d3a5c82 | 1491 | return EFI_INVALID_PARAMETER;\r |
1492 | }\r | |
c6492839 | 1493 | \r |
1494 | if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {\r | |
8d3a5c82 | 1495 | //\r |
1496 | // Make sure the Attributes combination is supported by the platform.\r | |
1497 | //\r | |
c6492839 | 1498 | return EFI_UNSUPPORTED; \r |
8d3a5c82 | 1499 | } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r |
1500 | //\r | |
1501 | // Make sure if runtime bit is set, boot service bit is set also.\r | |
1502 | //\r | |
1503 | return EFI_INVALID_PARAMETER;\r | |
1504 | } else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r | |
1505 | //\r | |
1506 | // Make sure RT Attribute is set if we are in Runtime phase.\r | |
1507 | //\r | |
1508 | return EFI_INVALID_PARAMETER;\r | |
1509 | }\r | |
1510 | \r | |
052ad7e1 | 1511 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1512 | \r |
1513 | if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r | |
1514 | //\r | |
1515 | // Query is Volatile related.\r | |
1516 | //\r | |
052ad7e1 | 1517 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
8d3a5c82 | 1518 | } else {\r |
1519 | //\r | |
1520 | // Query is Non-Volatile related.\r | |
1521 | //\r | |
052ad7e1 | 1522 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1523 | }\r |
1524 | \r | |
1525 | //\r | |
1526 | // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize\r | |
1527 | // with the storage size (excluding the storage header size).\r | |
1528 | //\r | |
1529 | *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1530 | *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1531 | \r | |
1532 | //\r | |
c6492839 | 1533 | // Let *MaximumVariableSize be MAX_VARIABLE_SIZE with the exception of the variable header size.\r |
8d3a5c82 | 1534 | //\r |
c6492839 | 1535 | *MaximumVariableSize = MAX_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r |
1536 | \r | |
1537 | //\r | |
1538 | // Harware error record variable needs larger size.\r | |
1539 | //\r | |
1540 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1541 | *MaximumVariableSize = MAX_HARDWARE_ERROR_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r | |
1542 | }\r | |
8d3a5c82 | 1543 | \r |
1544 | //\r | |
1545 | // Point to the starting address of the variables.\r | |
1546 | //\r | |
9cad030b | 1547 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 1548 | \r |
1549 | //\r | |
1550 | // Now walk through the related variable store.\r | |
1551 | //\r | |
1552 | while (IsValidVariableHeader (Variable) && (Variable < GetEndPointer (VariableStoreHeader))) {\r | |
1553 | NextVariable = GetNextVariablePtr (Variable);\r | |
1554 | VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r | |
1555 | \r | |
1556 | if (EfiAtRuntime ()) {\r | |
1557 | //\r | |
1558 | // we don't take the state of the variables in mind\r | |
1559 | // when calculating RemainingVariableStorageSize,\r | |
1560 | // since the space occupied by variables not marked with\r | |
1561 | // VAR_ADDED is not allowed to be reclaimed in Runtime.\r | |
1562 | //\r | |
1563 | *RemainingVariableStorageSize -= VariableSize;\r | |
1564 | } else {\r | |
1565 | //\r | |
1566 | // Only care about Variables with State VAR_ADDED,because\r | |
1567 | // the space not marked as VAR_ADDED is reclaimable now.\r | |
1568 | //\r | |
1569 | if (Variable->State == VAR_ADDED) {\r | |
1570 | *RemainingVariableStorageSize -= VariableSize;\r | |
1571 | }\r | |
1572 | }\r | |
1573 | \r | |
1574 | //\r | |
1575 | // Go to the next one\r | |
1576 | //\r | |
1577 | Variable = NextVariable;\r | |
1578 | }\r | |
1579 | \r | |
c6492839 | 1580 | if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {\r |
1581 | *MaximumVariableSize = 0;\r | |
1582 | } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {\r | |
1583 | *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);\r | |
1584 | }\r | |
1585 | \r | |
052ad7e1 | 1586 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1587 | return EFI_SUCCESS;\r |
1588 | }\r | |
1589 | \r | |
1590 | EFI_STATUS\r | |
8d3a5c82 | 1591 | VariableCommonInitialize (\r |
1592 | IN EFI_HANDLE ImageHandle,\r | |
1593 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1594 | )\r | |
1595 | /*++\r | |
1596 | \r | |
1597 | Routine Description:\r | |
1598 | This function does common initialization for variable services\r | |
1599 | \r | |
1600 | Arguments:\r | |
1601 | \r | |
1602 | ImageHandle - The firmware allocated handle for the EFI image.\r | |
1603 | SystemTable - A pointer to the EFI System Table.\r | |
1604 | \r | |
1605 | Returns:\r | |
1606 | \r | |
1607 | Status code.\r | |
1608 | \r | |
1609 | EFI_NOT_FOUND - Variable store area not found.\r | |
1610 | EFI_UNSUPPORTED - Currently only one non-volatile variable store is supported.\r | |
1611 | EFI_SUCCESS - Variable services successfully initialized.\r | |
1612 | \r | |
1613 | --*/\r | |
1614 | {\r | |
1615 | EFI_STATUS Status;\r | |
1616 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
1617 | CHAR8 *CurrPtr;\r | |
1618 | VARIABLE_STORE_HEADER *VolatileVariableStore;\r | |
1619 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1620 | VARIABLE_HEADER *NextVariable;\r | |
1621 | UINT32 Instance;\r | |
1622 | EFI_PHYSICAL_ADDRESS FvVolHdr;\r | |
8d3a5c82 | 1623 | UINT64 TempVariableStoreHeader;\r |
8d3a5c82 | 1624 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r |
8d3a5c82 | 1625 | UINT64 BaseAddress;\r |
1626 | UINT64 Length;\r | |
1627 | UINTN Index;\r | |
1628 | UINT8 Data;\r | |
052ad7e1 A |
1629 | UINT64 VariableStoreBase;\r |
1630 | UINT64 VariableStoreLength;\r | |
8d3a5c82 | 1631 | \r |
8d3a5c82 | 1632 | \r |
052ad7e1 | 1633 | EfiInitializeLock(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock, TPL_NOTIFY);\r |
fdb7765f | 1634 | mVariableModuleGlobal->VariableGlobal.ReentrantState = 0;\r |
8d3a5c82 | 1635 | \r |
1636 | //\r | |
1637 | // Allocate memory for volatile variable store\r | |
1638 | //\r | |
1639 | VolatileVariableStore = AllocateRuntimePool (VARIABLE_STORE_SIZE + SCRATCH_SIZE);\r | |
1640 | if (VolatileVariableStore == NULL) {\r | |
1641 | FreePool (mVariableModuleGlobal);\r | |
1642 | return EFI_OUT_OF_RESOURCES;\r | |
1643 | }\r | |
1644 | \r | |
1645 | SetMem (VolatileVariableStore, VARIABLE_STORE_SIZE + SCRATCH_SIZE, 0xff);\r | |
1646 | \r | |
1647 | //\r | |
1648 | // Variable Specific Data\r | |
1649 | //\r | |
052ad7e1 | 1650 | mVariableModuleGlobal->VariableGlobal.VolatileVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VolatileVariableStore;\r |
9cad030b | 1651 | mVariableModuleGlobal->VolatileLastVariableOffset = (UINTN) GetStartPointer (VolatileVariableStore) - (UINTN) VolatileVariableStore;\r |
8d3a5c82 | 1652 | \r |
1653 | VolatileVariableStore->Signature = VARIABLE_STORE_SIGNATURE;\r | |
1654 | VolatileVariableStore->Size = VARIABLE_STORE_SIZE;\r | |
1655 | VolatileVariableStore->Format = VARIABLE_STORE_FORMATTED;\r | |
1656 | VolatileVariableStore->State = VARIABLE_STORE_HEALTHY;\r | |
1657 | VolatileVariableStore->Reserved = 0;\r | |
1658 | VolatileVariableStore->Reserved1 = 0;\r | |
1659 | \r | |
1660 | //\r | |
1661 | // Get non volatile varaible store\r | |
1662 | //\r | |
1663 | \r | |
1664 | TempVariableStoreHeader = (UINT64) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
052ad7e1 | 1665 | VariableStoreBase = TempVariableStoreHeader + \\r |
8d3a5c82 | 1666 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
052ad7e1 | 1667 | VariableStoreLength = (UINT64) PcdGet32 (PcdFlashNvStorageVariableSize) - \\r |
8d3a5c82 | 1668 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
1669 | //\r | |
1670 | // Mark the variable storage region of the FLASH as RUNTIME\r | |
1671 | //\r | |
052ad7e1 A |
1672 | BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK);\r |
1673 | Length = VariableStoreLength + (VariableStoreBase - BaseAddress);\r | |
8d3a5c82 | 1674 | Length = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK);\r |
1675 | \r | |
1676 | Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);\r | |
1677 | if (EFI_ERROR (Status)) {\r | |
1678 | FreePool (mVariableModuleGlobal);\r | |
1679 | FreePool (VolatileVariableStore);\r | |
1680 | return EFI_UNSUPPORTED;\r | |
1681 | }\r | |
1682 | \r | |
1683 | Status = gDS->SetMemorySpaceAttributes (\r | |
1684 | BaseAddress,\r | |
1685 | Length,\r | |
1686 | GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME\r | |
1687 | );\r | |
1688 | if (EFI_ERROR (Status)) {\r | |
1689 | FreePool (mVariableModuleGlobal);\r | |
1690 | FreePool (VolatileVariableStore);\r | |
1691 | return EFI_UNSUPPORTED;\r | |
1692 | }\r | |
1693 | //\r | |
1694 | // Get address of non volatile variable store base\r | |
1695 | //\r | |
052ad7e1 | 1696 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;\r |
8d3a5c82 | 1697 | \r |
1698 | //\r | |
1699 | // Check Integrity\r | |
1700 | //\r | |
1701 | //\r | |
1702 | // Find the Correct Instance of the FV Block Service.\r | |
1703 | //\r | |
1704 | Instance = 0;\r | |
052ad7e1 | 1705 | CurrPtr = (CHAR8 *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1706 | while (EfiFvbGetPhysicalAddress (Instance, &FvVolHdr) == EFI_SUCCESS) {\r |
1707 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r | |
1708 | if (CurrPtr >= (CHAR8 *) FwVolHeader && CurrPtr < (((CHAR8 *) FwVolHeader) + FwVolHeader->FvLength)) {\r | |
1709 | mVariableModuleGlobal->FvbInstance = Instance;\r | |
1710 | break;\r | |
1711 | }\r | |
1712 | \r | |
1713 | Instance++;\r | |
1714 | }\r | |
1715 | \r | |
1716 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) CurrPtr;\r | |
1717 | if (GetVariableStoreStatus (VariableStoreHeader) == EfiValid) {\r | |
1718 | if (~VariableStoreHeader->Size == 0) {\r | |
1719 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1720 | &mVariableModuleGlobal->VariableGlobal,\r |
8d3a5c82 | 1721 | FALSE,\r |
1722 | FALSE,\r | |
1723 | mVariableModuleGlobal->FvbInstance,\r | |
1724 | (UINTN) &VariableStoreHeader->Size,\r | |
1725 | sizeof (UINT32),\r | |
052ad7e1 | 1726 | (UINT8 *) &VariableStoreLength\r |
8d3a5c82 | 1727 | );\r |
1728 | //\r | |
1729 | // As Variables are stored in NV storage, which are slow devices,such as flash.\r | |
1730 | // Variable operation may skip checking variable program result to improve performance,\r | |
1731 | // We can assume Variable program is OK through some check point.\r | |
1732 | // Variable Store Size Setting should be the first Variable write operation,\r | |
1733 | // We can assume all Read/Write is OK if we can set Variable store size successfully.\r | |
1734 | // If write fail, we will assert here\r | |
1735 | //\r | |
052ad7e1 | 1736 | ASSERT(VariableStoreHeader->Size == VariableStoreLength);\r |
8d3a5c82 | 1737 | \r |
1738 | if (EFI_ERROR (Status)) {\r | |
1739 | return Status;\r | |
1740 | }\r | |
1741 | }\r | |
1742 | \r | |
052ad7e1 | 1743 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = (EFI_PHYSICAL_ADDRESS) ((UINTN) CurrPtr);\r |
8d3a5c82 | 1744 | //\r |
1745 | // Parse non-volatile variable data and get last variable offset\r | |
1746 | //\r | |
9cad030b | 1747 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) CurrPtr);\r |
8d3a5c82 | 1748 | Status = EFI_SUCCESS;\r |
1749 | \r | |
1750 | while (IsValidVariableHeader (NextVariable)) {\r | |
1751 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1752 | }\r | |
1753 | \r | |
1754 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) CurrPtr;\r | |
1755 | \r | |
1756 | //\r | |
1757 | // Check if the free area is blow a threshold\r | |
1758 | //\r | |
1759 | if ((((VARIABLE_STORE_HEADER *)((UINTN) CurrPtr))->Size - mVariableModuleGlobal->NonVolatileLastVariableOffset) < VARIABLE_RECLAIM_THRESHOLD) {\r | |
1760 | Status = Reclaim (\r | |
052ad7e1 | 1761 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r |
8d3a5c82 | 1762 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r |
1763 | FALSE\r | |
1764 | );\r | |
1765 | }\r | |
1766 | \r | |
1767 | if (EFI_ERROR (Status)) {\r | |
1768 | FreePool (mVariableModuleGlobal);\r | |
1769 | FreePool (VolatileVariableStore);\r | |
1770 | return Status;\r | |
1771 | }\r | |
1772 | \r | |
1773 | //\r | |
1774 | // Check if the free area is really free.\r | |
1775 | //\r | |
1776 | for (Index = mVariableModuleGlobal->NonVolatileLastVariableOffset; Index < VariableStoreHeader->Size; Index++) {\r | |
052ad7e1 | 1777 | Data = ((UINT8 *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)[Index];\r |
8d3a5c82 | 1778 | if (Data != 0xff) {\r |
1779 | //\r | |
1780 | // There must be something wrong in variable store, do reclaim operation.\r | |
1781 | //\r | |
1782 | Status = Reclaim (\r | |
052ad7e1 | 1783 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r |
8d3a5c82 | 1784 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r |
1785 | FALSE\r | |
1786 | );\r | |
1787 | break;\r | |
1788 | }\r | |
1789 | }\r | |
1790 | }\r | |
1791 | \r | |
1792 | if (EFI_ERROR (Status)) {\r | |
1793 | FreePool (mVariableModuleGlobal);\r | |
1794 | FreePool (VolatileVariableStore);\r | |
1795 | }\r | |
1796 | \r | |
1797 | return Status;\r | |
1798 | }\r | |
052ad7e1 A |
1799 | \r |
1800 | \r | |
1801 | \r | |
1802 | \r | |
1803 | VOID\r | |
1804 | EFIAPI\r | |
1805 | VariableClassAddressChangeEvent (\r | |
1806 | IN EFI_EVENT Event,\r | |
1807 | IN VOID *Context\r | |
1808 | )\r | |
1809 | {\r | |
1810 | EfiConvertPointer (\r | |
1811 | 0x0,\r | |
1812 | (VOID **) &mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase\r | |
1813 | );\r | |
1814 | EfiConvertPointer (\r | |
1815 | 0x0,\r | |
1816 | (VOID **) &mVariableModuleGlobal->VariableGlobal.VolatileVariableBase\r | |
1817 | );\r | |
1818 | EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);\r | |
1819 | }\r | |
1820 | \r | |
1821 | \r | |
1822 | /**\r | |
1823 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
1824 | runtime services in the EFI System Table and installs arch protocols \r | |
1825 | for variable read and write services being availible. \r | |
1826 | \r | |
1827 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
1828 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
1829 | \r | |
1830 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
1831 | @retval other Some error occurs when executing this entry point.\r | |
1832 | \r | |
1833 | **/\r | |
1834 | EFI_STATUS\r | |
1835 | EFIAPI\r | |
1836 | VariableServiceInitialize (\r | |
1837 | IN EFI_HANDLE ImageHandle,\r | |
1838 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1839 | )\r | |
1840 | {\r | |
1841 | EFI_STATUS Status;\r | |
1842 | \r | |
1843 | Status = VariableCommonInitialize (ImageHandle, SystemTable);\r | |
1844 | ASSERT_EFI_ERROR (Status);\r | |
1845 | \r | |
1846 | SystemTable->RuntimeServices->GetVariable = RuntimeServiceGetVariable;\r | |
1847 | SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
1848 | SystemTable->RuntimeServices->SetVariable = RuntimeServiceSetVariable;\r | |
1849 | SystemTable->RuntimeServices->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
1850 | \r | |
1851 | //\r | |
1852 | // Now install the Variable Runtime Architectural Protocol on a new handle\r | |
1853 | //\r | |
1854 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1855 | &mHandle,\r | |
1856 | &gEfiVariableArchProtocolGuid, NULL,\r | |
1857 | &gEfiVariableWriteArchProtocolGuid, NULL,\r | |
1858 | NULL\r | |
1859 | );\r | |
1860 | ASSERT_EFI_ERROR (Status);\r | |
1861 | \r | |
1862 | Status = gBS->CreateEvent (\r | |
1863 | EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r | |
1864 | TPL_NOTIFY,\r | |
1865 | VariableClassAddressChangeEvent,\r | |
1866 | NULL,\r | |
1867 | &mVirtualAddressChangeEvent\r | |
1868 | );\r | |
1869 | ASSERT_EFI_ERROR (Status);\r | |
1870 | \r | |
1871 | return EFI_SUCCESS;\r | |
1872 | }\r | |
1873 | \r |