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052ad7e1 A |
1 | /** @file\r |
2 | EFI Runtime Variable services.\r | |
3 | \r | |
7800593d | 4 | Copyright (c) 2006 - 2008, Intel Corporation \r |
052ad7e1 A |
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 | 17 | \r |
7800593d | 18 | VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r |
052ad7e1 A |
19 | EFI_EVENT mVirtualAddressChangeEvent = NULL;\r |
20 | EFI_HANDLE mHandle = NULL;\r | |
8d3a5c82 | 21 | \r |
33a5a666 | 22 | \r |
8d3a5c82 | 23 | //\r |
24 | // This is a temperary function which will be removed\r | |
25 | // when EfiAcquireLock in UefiLib can handle the\r | |
26 | // the call in UEFI Runtimer driver in RT phase.\r | |
27 | //\r | |
8d3a5c82 | 28 | VOID\r |
29 | AcquireLockOnlyAtBootTime (\r | |
30 | IN EFI_LOCK *Lock\r | |
31 | )\r | |
32 | {\r | |
33 | if (!EfiAtRuntime ()) {\r | |
34 | EfiAcquireLock (Lock);\r | |
35 | }\r | |
36 | }\r | |
37 | \r | |
38 | //\r | |
39 | // This is a temperary function which will be removed\r | |
40 | // when EfiAcquireLock in UefiLib can handle the\r | |
41 | // the call in UEFI Runtimer driver in RT phase.\r | |
42 | //\r | |
8d3a5c82 | 43 | VOID\r |
44 | ReleaseLockOnlyAtBootTime (\r | |
45 | IN EFI_LOCK *Lock\r | |
46 | )\r | |
47 | {\r | |
48 | if (!EfiAtRuntime ()) {\r | |
49 | EfiReleaseLock (Lock);\r | |
50 | }\r | |
51 | }\r | |
52 | \r | |
33a5a666 A |
53 | \r |
54 | GLOBAL_REMOVE_IF_UNREFERENCED VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r | |
55 | \r | |
56 | \r | |
052ad7e1 A |
57 | /**\r |
58 | Routine used to track statistical information about variable usage. \r | |
59 | The data is stored in the EFI system table so it can be accessed later.\r | |
60 | VariableInfo.efi can dump out the table. Only Boot Services variable \r | |
61 | accesses are tracked by this code. The PcdVariableCollectStatistics\r | |
62 | build flag controls if this feature is enabled. \r | |
63 | \r | |
64 | A read that hits in the cache will have Read and Cache true for \r | |
65 | the transaction. Data is allocated by this routine, but never\r | |
66 | freed.\r | |
67 | \r | |
68 | @param[in] VariableName Name of the Variable to track\r | |
69 | @param[in] VendorGuid Guid of the Variable to track\r | |
70 | @param[in] Volatile TRUE if volatile FALSE if non-volatile\r | |
71 | @param[in] Read TRUE if GetVariable() was called\r | |
72 | @param[in] Write TRUE if SetVariable() was called\r | |
73 | @param[in] Delete TRUE if deleted via SetVariable()\r | |
74 | @param[in] Cache TRUE for a cache hit.\r | |
75 | \r | |
76 | **/\r | |
33a5a666 A |
77 | VOID\r |
78 | UpdateVariableInfo (\r | |
79 | IN CHAR16 *VariableName,\r | |
80 | IN EFI_GUID *VendorGuid,\r | |
81 | IN BOOLEAN Volatile,\r | |
82 | IN BOOLEAN Read,\r | |
83 | IN BOOLEAN Write,\r | |
84 | IN BOOLEAN Delete,\r | |
85 | IN BOOLEAN Cache\r | |
86 | )\r | |
87 | {\r | |
88 | VARIABLE_INFO_ENTRY *Entry;\r | |
89 | \r | |
90 | if (FeaturePcdGet (PcdVariableCollectStatistics)) {\r | |
91 | \r | |
92 | if (EfiAtRuntime ()) {\r | |
93 | // Don't collect statistics at runtime\r | |
94 | return;\r | |
95 | }\r | |
96 | \r | |
97 | if (gVariableInfo == NULL) {\r | |
052ad7e1 A |
98 | //\r |
99 | // on the first call allocate a entry and place a pointer to it in\r | |
100 | // the EFI System Table\r | |
101 | //\r | |
33a5a666 | 102 | gVariableInfo = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r |
052ad7e1 A |
103 | ASSERT (gVariableInfo != NULL);\r |
104 | \r | |
33a5a666 A |
105 | CopyGuid (&gVariableInfo->VendorGuid, VendorGuid);\r |
106 | gVariableInfo->Name = AllocatePool (StrLen (VariableName));\r | |
107 | StrCpy (gVariableInfo->Name, VariableName);\r | |
108 | gVariableInfo->Volatile = Volatile;\r | |
109 | \r | |
110 | gBS->InstallConfigurationTable (&gEfiVariableInfoGuid, gVariableInfo);\r | |
111 | }\r | |
112 | \r | |
113 | \r | |
114 | for (Entry = gVariableInfo; Entry != NULL; Entry = Entry->Next) {\r | |
115 | if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {\r | |
116 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
117 | if (Read) {\r | |
118 | Entry->ReadCount++;\r | |
119 | }\r | |
120 | if (Write) {\r | |
121 | Entry->WriteCount++;\r | |
122 | }\r | |
123 | if (Delete) {\r | |
124 | Entry->DeleteCount++;\r | |
125 | }\r | |
126 | if (Cache) {\r | |
127 | Entry->CacheCount++;\r | |
128 | }\r | |
129 | \r | |
130 | return;\r | |
131 | }\r | |
132 | }\r | |
133 | \r | |
134 | if (Entry->Next == NULL) {\r | |
052ad7e1 A |
135 | //\r |
136 | // If the entry is not in the table add it.\r | |
137 | // Next iteration of the loop will fill in the data\r | |
138 | //\r | |
33a5a666 | 139 | Entry->Next = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r |
052ad7e1 | 140 | ASSERT (Entry->Next != NULL);\r |
33a5a666 A |
141 | \r |
142 | CopyGuid (&Entry->Next->VendorGuid, VendorGuid);\r | |
143 | Entry->Next->Name = AllocatePool (StrLen (VariableName));\r | |
144 | StrCpy (Entry->Next->Name, VariableName);\r | |
145 | Entry->Next->Volatile = Volatile;\r | |
146 | }\r | |
147 | \r | |
148 | }\r | |
149 | }\r | |
150 | }\r | |
151 | \r | |
152 | \r | |
8d3a5c82 | 153 | BOOLEAN\r |
8d3a5c82 | 154 | IsValidVariableHeader (\r |
155 | IN VARIABLE_HEADER *Variable\r | |
156 | )\r | |
157 | /*++\r | |
158 | \r | |
159 | Routine Description:\r | |
160 | \r | |
161 | This code checks if variable header is valid or not.\r | |
162 | \r | |
163 | Arguments:\r | |
164 | Variable Pointer to the Variable Header.\r | |
165 | \r | |
166 | Returns:\r | |
167 | TRUE Variable header is valid.\r | |
168 | FALSE Variable header is not valid.\r | |
169 | \r | |
170 | --*/\r | |
171 | {\r | |
fdb7765f | 172 | if (Variable == NULL || Variable->StartId != VARIABLE_DATA) {\r |
8d3a5c82 | 173 | return FALSE;\r |
174 | }\r | |
175 | \r | |
176 | return TRUE;\r | |
177 | }\r | |
178 | \r | |
052ad7e1 | 179 | \r |
8d3a5c82 | 180 | EFI_STATUS\r |
8d3a5c82 | 181 | UpdateVariableStore (\r |
182 | IN VARIABLE_GLOBAL *Global,\r | |
183 | IN BOOLEAN Volatile,\r | |
184 | IN BOOLEAN SetByIndex,\r | |
185 | IN UINTN Instance,\r | |
186 | IN UINTN DataPtrIndex,\r | |
187 | IN UINT32 DataSize,\r | |
188 | IN UINT8 *Buffer\r | |
189 | )\r | |
190 | /*++\r | |
191 | \r | |
192 | Routine Description:\r | |
193 | \r | |
194 | This function writes data to the FWH at the correct LBA even if the LBAs\r | |
195 | are fragmented.\r | |
196 | \r | |
197 | Arguments:\r | |
198 | \r | |
c6492839 | 199 | Global - Pointer to VARAIBLE_GLOBAL structure\r |
200 | Volatile - If the Variable is Volatile or Non-Volatile\r | |
201 | SetByIndex - TRUE: Target pointer is given as index\r | |
202 | FALSE: Target pointer is absolute\r | |
203 | Instance - Instance of FV Block services\r | |
204 | DataPtrIndex - Pointer to the Data from the end of VARIABLE_STORE_HEADER\r | |
205 | structure\r | |
206 | DataSize - Size of data to be written.\r | |
207 | Buffer - Pointer to the buffer from which data is written\r | |
8d3a5c82 | 208 | \r |
209 | Returns:\r | |
210 | \r | |
c6492839 | 211 | EFI_INVALID_PARAMETER - Parameters not valid\r |
212 | EFI_SUCCESS - Variable store successfully updated\r | |
8d3a5c82 | 213 | \r |
214 | --*/\r | |
215 | {\r | |
216 | EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;\r | |
217 | UINTN BlockIndex2;\r | |
218 | UINTN LinearOffset;\r | |
219 | UINTN CurrWriteSize;\r | |
220 | UINTN CurrWritePtr;\r | |
221 | UINT8 *CurrBuffer;\r | |
222 | EFI_LBA LbaNumber;\r | |
223 | UINTN Size;\r | |
224 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
225 | VARIABLE_STORE_HEADER *VolatileBase;\r | |
226 | EFI_PHYSICAL_ADDRESS FvVolHdr;\r | |
227 | EFI_PHYSICAL_ADDRESS DataPtr;\r | |
228 | EFI_STATUS Status;\r | |
229 | \r | |
230 | FwVolHeader = NULL;\r | |
231 | DataPtr = DataPtrIndex;\r | |
232 | \r | |
233 | //\r | |
234 | // Check if the Data is Volatile\r | |
235 | //\r | |
236 | if (!Volatile) {\r | |
237 | EfiFvbGetPhysicalAddress (Instance, &FvVolHdr);\r | |
238 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r | |
239 | //\r | |
240 | // Data Pointer should point to the actual Address where data is to be\r | |
241 | // written\r | |
242 | //\r | |
243 | if (SetByIndex) {\r | |
052ad7e1 | 244 | DataPtr += mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;\r |
8d3a5c82 | 245 | }\r |
246 | \r | |
247 | if ((DataPtr + DataSize) >= ((EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) FwVolHeader + FwVolHeader->FvLength))) {\r | |
248 | return EFI_INVALID_PARAMETER;\r | |
249 | }\r | |
250 | } else {\r | |
251 | //\r | |
252 | // Data Pointer should point to the actual Address where data is to be\r | |
253 | // written\r | |
254 | //\r | |
052ad7e1 | 255 | VolatileBase = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
8d3a5c82 | 256 | if (SetByIndex) {\r |
052ad7e1 | 257 | DataPtr += mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r |
8d3a5c82 | 258 | }\r |
259 | \r | |
260 | if ((DataPtr + DataSize) >= ((UINTN) ((UINT8 *) VolatileBase + VolatileBase->Size))) {\r | |
261 | return EFI_INVALID_PARAMETER;\r | |
262 | }\r | |
c6492839 | 263 | \r |
264 | //\r | |
265 | // If Volatile Variable just do a simple mem copy.\r | |
266 | // \r | |
267 | CopyMem ((UINT8 *)(UINTN)DataPtr, Buffer, DataSize);\r | |
8d3a5c82 | 268 | return EFI_SUCCESS;\r |
269 | }\r | |
c6492839 | 270 | \r |
8d3a5c82 | 271 | //\r |
272 | // If we are here we are dealing with Non-Volatile Variables\r | |
273 | //\r | |
274 | LinearOffset = (UINTN) FwVolHeader;\r | |
275 | CurrWritePtr = (UINTN) DataPtr;\r | |
276 | CurrWriteSize = DataSize;\r | |
277 | CurrBuffer = Buffer;\r | |
278 | LbaNumber = 0;\r | |
279 | \r | |
280 | if (CurrWritePtr < LinearOffset) {\r | |
281 | return EFI_INVALID_PARAMETER;\r | |
282 | }\r | |
283 | \r | |
284 | for (PtrBlockMapEntry = FwVolHeader->BlockMap; PtrBlockMapEntry->NumBlocks != 0; PtrBlockMapEntry++) {\r | |
285 | for (BlockIndex2 = 0; BlockIndex2 < PtrBlockMapEntry->NumBlocks; BlockIndex2++) {\r | |
286 | //\r | |
287 | // Check to see if the Variable Writes are spanning through multiple\r | |
288 | // blocks.\r | |
289 | //\r | |
290 | if ((CurrWritePtr >= LinearOffset) && (CurrWritePtr < LinearOffset + PtrBlockMapEntry->Length)) {\r | |
291 | if ((CurrWritePtr + CurrWriteSize) <= (LinearOffset + PtrBlockMapEntry->Length)) {\r | |
292 | Status = EfiFvbWriteBlock (\r | |
293 | Instance,\r | |
294 | LbaNumber,\r | |
295 | (UINTN) (CurrWritePtr - LinearOffset),\r | |
296 | &CurrWriteSize,\r | |
297 | CurrBuffer\r | |
298 | );\r | |
8d3a5c82 | 299 | return Status;\r |
8d3a5c82 | 300 | } else {\r |
301 | Size = (UINT32) (LinearOffset + PtrBlockMapEntry->Length - CurrWritePtr);\r | |
302 | Status = EfiFvbWriteBlock (\r | |
303 | Instance,\r | |
304 | LbaNumber,\r | |
305 | (UINTN) (CurrWritePtr - LinearOffset),\r | |
306 | &Size,\r | |
307 | CurrBuffer\r | |
308 | );\r | |
309 | if (EFI_ERROR (Status)) {\r | |
310 | return Status;\r | |
311 | }\r | |
312 | \r | |
313 | CurrWritePtr = LinearOffset + PtrBlockMapEntry->Length;\r | |
314 | CurrBuffer = CurrBuffer + Size;\r | |
315 | CurrWriteSize = CurrWriteSize - Size;\r | |
316 | }\r | |
317 | }\r | |
318 | \r | |
319 | LinearOffset += PtrBlockMapEntry->Length;\r | |
320 | LbaNumber++;\r | |
321 | }\r | |
322 | }\r | |
323 | \r | |
324 | return EFI_SUCCESS;\r | |
325 | }\r | |
326 | \r | |
052ad7e1 | 327 | \r |
8d3a5c82 | 328 | VARIABLE_STORE_STATUS\r |
8d3a5c82 | 329 | GetVariableStoreStatus (\r |
330 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
331 | )\r | |
332 | /*++\r | |
333 | \r | |
334 | Routine Description:\r | |
335 | \r | |
336 | This code gets the current status of Variable Store.\r | |
337 | \r | |
338 | Arguments:\r | |
339 | \r | |
340 | VarStoreHeader Pointer to the Variable Store Header.\r | |
341 | \r | |
342 | Returns:\r | |
343 | \r | |
344 | EfiRaw Variable store status is raw\r | |
345 | EfiValid Variable store status is valid\r | |
346 | EfiInvalid Variable store status is invalid\r | |
347 | \r | |
348 | --*/\r | |
349 | {\r | |
350 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r | |
351 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r | |
352 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r | |
353 | ) {\r | |
354 | \r | |
355 | return EfiValid;\r | |
356 | } else if (VarStoreHeader->Signature == 0xffffffff &&\r | |
357 | VarStoreHeader->Size == 0xffffffff &&\r | |
358 | VarStoreHeader->Format == 0xff &&\r | |
359 | VarStoreHeader->State == 0xff\r | |
360 | ) {\r | |
361 | \r | |
362 | return EfiRaw;\r | |
363 | } else {\r | |
364 | return EfiInvalid;\r | |
365 | }\r | |
366 | }\r | |
367 | \r | |
130e2569 | 368 | \r |
369 | UINTN\r | |
370 | NameSizeOfVariable (\r | |
371 | IN VARIABLE_HEADER *Variable\r | |
372 | )\r | |
373 | /*++\r | |
374 | \r | |
375 | Routine Description:\r | |
376 | \r | |
377 | This code gets the size of name of variable.\r | |
378 | \r | |
379 | Arguments:\r | |
380 | \r | |
381 | Variable Pointer to the Variable Header.\r | |
382 | \r | |
383 | Returns:\r | |
384 | \r | |
385 | UINTN Size of variable in bytes\r | |
386 | \r | |
387 | --*/\r | |
388 | {\r | |
389 | if (Variable->State == (UINT8) (-1) ||\r | |
390 | Variable->DataSize == (UINT32) -1 ||\r | |
391 | Variable->NameSize == (UINT32) -1 ||\r | |
392 | Variable->Attributes == (UINT32) -1) {\r | |
393 | return 0;\r | |
394 | }\r | |
395 | return (UINTN) Variable->NameSize;\r | |
396 | }\r | |
397 | \r | |
398 | UINTN\r | |
399 | DataSizeOfVariable (\r | |
400 | IN VARIABLE_HEADER *Variable\r | |
401 | )\r | |
402 | /*++\r | |
403 | \r | |
404 | Routine Description:\r | |
405 | \r | |
406 | This code gets the size of name of variable.\r | |
407 | \r | |
408 | Arguments:\r | |
409 | \r | |
410 | Variable Pointer to the Variable Header.\r | |
411 | \r | |
412 | Returns:\r | |
413 | \r | |
414 | UINTN Size of variable in bytes\r | |
415 | \r | |
416 | --*/\r | |
417 | {\r | |
418 | if (Variable->State == (UINT8) -1 ||\r | |
419 | Variable->DataSize == (UINT32) -1 ||\r | |
420 | Variable->NameSize == (UINT32) -1 ||\r | |
421 | Variable->Attributes == (UINT32) -1) {\r | |
422 | return 0;\r | |
423 | }\r | |
424 | return (UINTN) Variable->DataSize;\r | |
425 | }\r | |
426 | \r | |
427 | CHAR16 *\r | |
428 | GetVariableNamePtr (\r | |
429 | IN VARIABLE_HEADER *Variable\r | |
430 | )\r | |
431 | /*++\r | |
432 | \r | |
433 | Routine Description:\r | |
434 | \r | |
435 | This code gets the pointer to the variable name.\r | |
436 | \r | |
437 | Arguments:\r | |
438 | \r | |
439 | Variable Pointer to the Variable Header.\r | |
440 | \r | |
441 | Returns:\r | |
442 | \r | |
443 | CHAR16* Pointer to Variable Name\r | |
444 | \r | |
445 | --*/\r | |
446 | {\r | |
447 | \r | |
448 | return (CHAR16 *) (Variable + 1);\r | |
449 | }\r | |
450 | \r | |
8d3a5c82 | 451 | UINT8 *\r |
8d3a5c82 | 452 | GetVariableDataPtr (\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 variable data.\r | |
460 | \r | |
461 | Arguments:\r | |
462 | \r | |
463 | Variable Pointer to the Variable Header.\r | |
464 | \r | |
465 | Returns:\r | |
466 | \r | |
467 | UINT8* Pointer to Variable Data\r | |
468 | \r | |
469 | --*/\r | |
470 | {\r | |
130e2569 | 471 | UINTN Value;\r |
472 | \r | |
8d3a5c82 | 473 | //\r |
474 | // Be careful about pad size for alignment\r | |
475 | //\r | |
130e2569 | 476 | Value = (UINTN) GetVariableNamePtr (Variable);\r |
477 | Value += NameSizeOfVariable (Variable);\r | |
478 | Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r | |
479 | \r | |
480 | return (UINT8 *) Value;\r | |
8d3a5c82 | 481 | }\r |
482 | \r | |
052ad7e1 | 483 | \r |
8d3a5c82 | 484 | VARIABLE_HEADER *\r |
8d3a5c82 | 485 | GetNextVariablePtr (\r |
486 | IN VARIABLE_HEADER *Variable\r | |
487 | )\r | |
488 | /*++\r | |
489 | \r | |
490 | Routine Description:\r | |
491 | \r | |
492 | This code gets the pointer to the next variable header.\r | |
493 | \r | |
494 | Arguments:\r | |
495 | \r | |
496 | Variable Pointer to the Variable Header.\r | |
497 | \r | |
498 | Returns:\r | |
499 | \r | |
500 | VARIABLE_HEADER* Pointer to next variable header.\r | |
501 | \r | |
502 | --*/\r | |
503 | {\r | |
130e2569 | 504 | UINTN Value;\r |
505 | \r | |
8d3a5c82 | 506 | if (!IsValidVariableHeader (Variable)) {\r |
507 | return NULL;\r | |
508 | }\r | |
130e2569 | 509 | \r |
510 | Value = (UINTN) GetVariableDataPtr (Variable);\r | |
511 | Value += DataSizeOfVariable (Variable);\r | |
512 | Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r | |
513 | \r | |
8d3a5c82 | 514 | //\r |
515 | // Be careful about pad size for alignment\r | |
516 | //\r | |
130e2569 | 517 | return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r |
8d3a5c82 | 518 | }\r |
519 | \r | |
9cad030b | 520 | VARIABLE_HEADER *\r |
521 | GetStartPointer (\r | |
522 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
523 | )\r | |
524 | /*++\r | |
525 | \r | |
526 | Routine Description:\r | |
527 | \r | |
528 | This code gets the pointer to the first variable memory pointer byte\r | |
529 | \r | |
530 | Arguments:\r | |
531 | \r | |
532 | VarStoreHeader Pointer to the Variable Store Header.\r | |
533 | \r | |
534 | Returns:\r | |
535 | \r | |
536 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
537 | \r | |
538 | --*/\r | |
539 | {\r | |
540 | //\r | |
541 | // The end of variable store\r | |
542 | //\r | |
543 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r | |
544 | }\r | |
052ad7e1 | 545 | \r |
8d3a5c82 | 546 | VARIABLE_HEADER *\r |
8d3a5c82 | 547 | GetEndPointer (\r |
548 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
549 | )\r | |
550 | /*++\r | |
551 | \r | |
552 | Routine Description:\r | |
553 | \r | |
554 | This code gets the pointer to the last variable memory pointer byte\r | |
555 | \r | |
556 | Arguments:\r | |
557 | \r | |
558 | VarStoreHeader Pointer to the Variable Store Header.\r | |
559 | \r | |
560 | Returns:\r | |
561 | \r | |
562 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
563 | \r | |
564 | --*/\r | |
565 | {\r | |
566 | //\r | |
567 | // The end of variable store\r | |
568 | //\r | |
9cad030b | 569 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r |
8d3a5c82 | 570 | }\r |
571 | \r | |
052ad7e1 | 572 | \r |
8d3a5c82 | 573 | EFI_STATUS\r |
8d3a5c82 | 574 | Reclaim (\r |
575 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
576 | OUT UINTN *LastVariableOffset,\r | |
577 | IN BOOLEAN IsVolatile\r | |
578 | )\r | |
579 | /*++\r | |
580 | \r | |
581 | Routine Description:\r | |
582 | \r | |
583 | Variable store garbage collection and reclaim operation\r | |
584 | \r | |
585 | Arguments:\r | |
586 | \r | |
587 | VariableBase Base address of variable store\r | |
588 | LastVariableOffset Offset of last variable\r | |
589 | IsVolatile The variable store is volatile or not,\r | |
590 | if it is non-volatile, need FTW\r | |
591 | \r | |
592 | Returns:\r | |
593 | \r | |
594 | EFI STATUS\r | |
595 | \r | |
596 | --*/\r | |
597 | {\r | |
598 | VARIABLE_HEADER *Variable;\r | |
599 | VARIABLE_HEADER *NextVariable;\r | |
600 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
601 | UINT8 *ValidBuffer;\r | |
602 | UINTN ValidBufferSize;\r | |
603 | UINTN VariableSize;\r | |
604 | UINT8 *CurrPtr;\r | |
605 | EFI_STATUS Status;\r | |
606 | \r | |
607 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);\r | |
608 | \r | |
609 | //\r | |
610 | // Start Pointers for the variable.\r | |
611 | //\r | |
9cad030b | 612 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 613 | ValidBufferSize = sizeof (VARIABLE_STORE_HEADER);\r |
614 | \r | |
615 | while (IsValidVariableHeader (Variable)) {\r | |
616 | NextVariable = GetNextVariablePtr (Variable);\r | |
617 | if (Variable->State == VAR_ADDED) {\r | |
618 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
619 | ValidBufferSize += VariableSize;\r | |
620 | }\r | |
621 | \r | |
622 | Variable = NextVariable;\r | |
623 | }\r | |
624 | \r | |
625 | ValidBuffer = AllocatePool (ValidBufferSize);\r | |
626 | if (ValidBuffer == NULL) {\r | |
627 | return EFI_OUT_OF_RESOURCES;\r | |
628 | }\r | |
629 | \r | |
630 | SetMem (ValidBuffer, ValidBufferSize, 0xff);\r | |
631 | \r | |
632 | CurrPtr = ValidBuffer;\r | |
633 | \r | |
634 | //\r | |
635 | // Copy variable store header\r | |
636 | //\r | |
637 | CopyMem (CurrPtr, VariableStoreHeader, sizeof (VARIABLE_STORE_HEADER));\r | |
77aa51cd | 638 | CurrPtr = (UINT8 *) GetStartPointer ((VARIABLE_STORE_HEADER *) CurrPtr);\r |
8d3a5c82 | 639 | \r |
640 | //\r | |
641 | // Start Pointers for the variable.\r | |
642 | //\r | |
9cad030b | 643 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 644 | \r |
645 | while (IsValidVariableHeader (Variable)) {\r | |
646 | NextVariable = GetNextVariablePtr (Variable);\r | |
647 | if (Variable->State == VAR_ADDED) {\r | |
648 | VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r | |
649 | CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r | |
650 | CurrPtr += VariableSize;\r | |
651 | }\r | |
652 | \r | |
653 | Variable = NextVariable;\r | |
654 | }\r | |
655 | \r | |
656 | if (IsVolatile) {\r | |
657 | //\r | |
658 | // If volatile variable store, just copy valid buffer\r | |
659 | //\r | |
660 | SetMem ((UINT8 *) (UINTN) VariableBase, VariableStoreHeader->Size, 0xff);\r | |
661 | CopyMem ((UINT8 *) (UINTN) VariableBase, ValidBuffer, ValidBufferSize);\r | |
662 | *LastVariableOffset = ValidBufferSize;\r | |
663 | Status = EFI_SUCCESS;\r | |
664 | } else {\r | |
665 | //\r | |
666 | // If non-volatile variable store, perform FTW here.\r | |
667 | //\r | |
668 | Status = FtwVariableSpace (\r | |
669 | VariableBase,\r | |
670 | ValidBuffer,\r | |
671 | ValidBufferSize\r | |
672 | );\r | |
673 | if (!EFI_ERROR (Status)) {\r | |
674 | *LastVariableOffset = ValidBufferSize;\r | |
675 | }\r | |
676 | }\r | |
677 | \r | |
678 | FreePool (ValidBuffer);\r | |
679 | \r | |
680 | if (EFI_ERROR (Status)) {\r | |
681 | *LastVariableOffset = 0;\r | |
682 | }\r | |
683 | \r | |
684 | return Status;\r | |
685 | }\r | |
686 | \r | |
33a5a666 A |
687 | \r |
688 | //\r | |
689 | // The current Hii implementation accesses this variable a larg # of times on every boot.\r | |
690 | // Other common variables are only accessed a single time. This is why this cache algorithm\r | |
691 | // only targets a single variable. Probably to get an performance improvement out of\r | |
692 | // a Cache you would need a cache that improves the search performance for a variable.\r | |
693 | //\r | |
694 | VARIABLE_CACHE_ENTRY mVariableCache[] = {\r | |
695 | {\r | |
696 | &gEfiGlobalVariableGuid,\r | |
697 | L"Lang",\r | |
698 | 0x00000000,\r | |
699 | 0x00,\r | |
700 | NULL\r | |
701 | }\r | |
702 | };\r | |
703 | \r | |
052ad7e1 A |
704 | \r |
705 | /**\r | |
706 | Update the Cache with Variable information. These are the same \r | |
707 | arguments as the EFI Variable services.\r | |
708 | \r | |
709 | @param[in] VariableName Name of variable\r | |
710 | @param[in] VendorGuid Guid of variable\r | |
711 | @param[in] Attribute Attribue of the variable\r | |
712 | @param[in] DataSize Size of data. 0 means delete\r | |
713 | @param[in] Data Variable data\r | |
714 | \r | |
715 | **/\r | |
33a5a666 A |
716 | VOID\r |
717 | UpdateVariableCache (\r | |
718 | IN CHAR16 *VariableName,\r | |
719 | IN EFI_GUID *VendorGuid,\r | |
052ad7e1 A |
720 | IN UINT32 Attributes,\r |
721 | IN UINTN DataSize,\r | |
722 | IN VOID *Data\r | |
33a5a666 A |
723 | )\r |
724 | {\r | |
725 | VARIABLE_CACHE_ENTRY *Entry;\r | |
726 | UINTN Index;\r | |
727 | \r | |
728 | if (EfiAtRuntime ()) {\r | |
729 | // Don't use the cache at runtime\r | |
730 | return;\r | |
731 | }\r | |
732 | \r | |
733 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
734 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
735 | if (StrCmp (VariableName, Entry->Name) == 0) { \r | |
736 | Entry->Attributes = Attributes;\r | |
737 | if (DataSize == 0) {\r | |
738 | // Delete Case\r | |
739 | if (Entry->DataSize != 0) {\r | |
740 | FreePool (Entry->Data);\r | |
741 | }\r | |
742 | Entry->DataSize = DataSize;\r | |
743 | } else if (DataSize == Entry->DataSize) {\r | |
744 | CopyMem (Entry->Data, Data, DataSize);\r | |
745 | } else {\r | |
746 | Entry->Data = AllocatePool (DataSize);\r | |
747 | Entry->DataSize = DataSize;\r | |
748 | CopyMem (Entry->Data, Data, DataSize);\r | |
749 | }\r | |
750 | }\r | |
751 | }\r | |
752 | }\r | |
753 | }\r | |
754 | \r | |
755 | \r | |
052ad7e1 A |
756 | /**\r |
757 | Search the cache to see if the variable is in the cache.\r | |
758 | \r | |
759 | @param[in] VariableName Name of variable\r | |
760 | @param[in] VendorGuid Guid of variable\r | |
761 | @param[in] Attribute Attribue returned \r | |
762 | @param[in] DataSize Size of data returned\r | |
763 | @param[in] Data Variable data returned\r | |
764 | \r | |
765 | @retval EFI_SUCCESS VariableGuid & VariableName data was returned.\r | |
766 | @retval other Not found.\r | |
767 | \r | |
768 | **/\r | |
33a5a666 A |
769 | EFI_STATUS\r |
770 | FindVariableInCache (\r | |
771 | IN CHAR16 *VariableName,\r | |
772 | IN EFI_GUID *VendorGuid,\r | |
773 | OUT UINT32 *Attributes OPTIONAL,\r | |
774 | IN OUT UINTN *DataSize,\r | |
775 | OUT VOID *Data\r | |
776 | )\r | |
777 | {\r | |
778 | VARIABLE_CACHE_ENTRY *Entry;\r | |
779 | UINTN Index;\r | |
780 | \r | |
781 | if (EfiAtRuntime ()) {\r | |
782 | // Don't use the cache at runtime\r | |
783 | return EFI_NOT_FOUND;\r | |
784 | }\r | |
785 | \r | |
786 | for (Index = 0, Entry = mVariableCache; Index < sizeof (mVariableCache)/sizeof (VARIABLE_CACHE_ENTRY); Index++, Entry++) {\r | |
787 | if (CompareGuid (VendorGuid, Entry->Guid)) {\r | |
788 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
789 | if (Entry->DataSize == 0) {\r | |
052ad7e1 | 790 | // Variable was deleted so return not found\r |
33a5a666 | 791 | return EFI_NOT_FOUND;\r |
aa09397b | 792 | } else if (Entry->DataSize > *DataSize) {\r |
052ad7e1 | 793 | // If the buffer is too small return correct size\r |
33a5a666 A |
794 | *DataSize = Entry->DataSize;\r |
795 | return EFI_BUFFER_TOO_SMALL;\r | |
796 | } else {\r | |
aa09397b | 797 | *DataSize = Entry->DataSize;\r |
052ad7e1 | 798 | // Return the data\r |
33a5a666 A |
799 | CopyMem (Data, Entry->Data, Entry->DataSize);\r |
800 | if (Attributes != NULL) {\r | |
801 | *Attributes = Entry->Attributes;\r | |
802 | }\r | |
803 | return EFI_SUCCESS;\r | |
804 | }\r | |
805 | }\r | |
806 | }\r | |
807 | }\r | |
808 | \r | |
809 | return EFI_NOT_FOUND;\r | |
810 | }\r | |
811 | \r | |
812 | \r | |
8d3a5c82 | 813 | EFI_STATUS\r |
8d3a5c82 | 814 | FindVariable (\r |
815 | IN CHAR16 *VariableName,\r | |
816 | IN EFI_GUID *VendorGuid,\r | |
817 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
818 | IN VARIABLE_GLOBAL *Global\r | |
819 | )\r | |
820 | /*++\r | |
821 | \r | |
822 | Routine Description:\r | |
823 | \r | |
824 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
825 | \r | |
826 | Arguments:\r | |
827 | \r | |
828 | VariableName Name of the variable to be found\r | |
829 | VendorGuid Vendor GUID to be found.\r | |
830 | PtrTrack Variable Track Pointer structure that contains\r | |
831 | Variable Information.\r | |
832 | Contains the pointer of Variable header.\r | |
833 | Global VARIABLE_GLOBAL pointer\r | |
834 | \r | |
835 | Returns:\r | |
836 | \r | |
837 | EFI STATUS\r | |
838 | \r | |
839 | --*/\r | |
840 | {\r | |
841 | VARIABLE_HEADER *Variable[2];\r | |
842 | VARIABLE_STORE_HEADER *VariableStoreHeader[2];\r | |
843 | UINTN Index;\r | |
130e2569 | 844 | VOID *Point;\r |
8d3a5c82 | 845 | \r |
8d3a5c82 | 846 | //\r |
33a5a666 | 847 | // 0: Volatile, 1: Non-Volatile\r |
36873a61 | 848 | // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName\r |
849 | // make use of this mapping to implement search algorithme.\r | |
8d3a5c82 | 850 | //\r |
052ad7e1 A |
851 | VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
852 | VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r | |
8d3a5c82 | 853 | \r |
854 | //\r | |
855 | // Start Pointers for the variable.\r | |
856 | // Actual Data Pointer where data can be written.\r | |
857 | //\r | |
9cad030b | 858 | Variable[0] = GetStartPointer (VariableStoreHeader[0]);\r |
859 | Variable[1] = GetStartPointer (VariableStoreHeader[1]);\r | |
8d3a5c82 | 860 | \r |
861 | if (VariableName[0] != 0 && VendorGuid == NULL) {\r | |
862 | return EFI_INVALID_PARAMETER;\r | |
863 | }\r | |
864 | //\r | |
33a5a666 | 865 | // Find the variable by walk through volatile and then non-volatile variable store\r |
8d3a5c82 | 866 | //\r |
867 | for (Index = 0; Index < 2; Index++) {\r | |
9cad030b | 868 | PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Index]);\r |
8d3a5c82 | 869 | PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);\r |
870 | \r | |
871 | while (IsValidVariableHeader (Variable[Index]) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {\r | |
872 | if (Variable[Index]->State == VAR_ADDED) {\r | |
c6492839 | 873 | if (!EfiAtRuntime () || (Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r |
8d3a5c82 | 874 | if (VariableName[0] == 0) {\r |
875 | PtrTrack->CurrPtr = Variable[Index];\r | |
33a5a666 | 876 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 877 | return EFI_SUCCESS;\r |
878 | } else {\r | |
879 | if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {\r | |
130e2569 | 880 | Point = (VOID *) GetVariableNamePtr (Variable[Index]);\r |
881 | \r | |
882 | ASSERT (NameSizeOfVariable (Variable[Index]) != 0);\r | |
883 | if (!CompareMem (VariableName, Point, NameSizeOfVariable (Variable[Index]))) {\r | |
8d3a5c82 | 884 | PtrTrack->CurrPtr = Variable[Index];\r |
33a5a666 | 885 | PtrTrack->Volatile = (BOOLEAN)(Index == 0);\r |
8d3a5c82 | 886 | return EFI_SUCCESS;\r |
887 | }\r | |
888 | }\r | |
889 | }\r | |
890 | }\r | |
891 | }\r | |
892 | \r | |
893 | Variable[Index] = GetNextVariablePtr (Variable[Index]);\r | |
894 | }\r | |
8d3a5c82 | 895 | }\r |
8d3a5c82 | 896 | PtrTrack->CurrPtr = NULL;\r |
897 | return EFI_NOT_FOUND;\r | |
898 | }\r | |
899 | \r | |
33a5a666 | 900 | \r |
052ad7e1 | 901 | \r |
8d3a5c82 | 902 | /*++\r |
903 | \r | |
904 | Routine Description:\r | |
905 | \r | |
906 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
907 | \r | |
908 | Arguments:\r | |
909 | \r | |
c6492839 | 910 | VariableName Name of Variable to be found\r |
911 | VendorGuid Variable vendor GUID\r | |
912 | Attributes OPTIONAL Attribute value of the variable found\r | |
913 | DataSize Size of Data found. If size is less than the\r | |
914 | data, this value contains the required size.\r | |
915 | Data Data pointer\r | |
916 | Global Pointer to VARIABLE_GLOBAL structure\r | |
917 | Instance Instance of the Firmware Volume.\r | |
8d3a5c82 | 918 | \r |
919 | Returns:\r | |
920 | \r | |
c6492839 | 921 | EFI_INVALID_PARAMETER - Invalid parameter\r |
922 | EFI_SUCCESS - Find the specified variable\r | |
923 | EFI_NOT_FOUND - Not found\r | |
924 | EFI_BUFFER_TO_SMALL - DataSize is too small for the result\r | |
925 | \r | |
8d3a5c82 | 926 | \r |
927 | --*/\r | |
052ad7e1 A |
928 | EFI_STATUS\r |
929 | EFIAPI\r | |
930 | RuntimeServiceGetVariable (\r | |
931 | IN CHAR16 *VariableName,\r | |
932 | IN EFI_GUID *VendorGuid,\r | |
933 | OUT UINT32 *Attributes OPTIONAL,\r | |
934 | IN OUT UINTN *DataSize,\r | |
935 | OUT VOID *Data\r | |
936 | )\r | |
8d3a5c82 | 937 | {\r |
052ad7e1 | 938 | EFI_STATUS Status;\r |
8d3a5c82 | 939 | VARIABLE_POINTER_TRACK Variable;\r |
940 | UINTN VarDataSize;\r | |
8d3a5c82 | 941 | \r |
942 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
943 | return EFI_INVALID_PARAMETER;\r | |
944 | }\r | |
33a5a666 | 945 | \r |
fdb7765f | 946 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
947 | \r | |
8d3a5c82 | 948 | //\r |
949 | // Find existing variable\r | |
950 | //\r | |
33a5a666 A |
951 | Status = FindVariableInCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
952 | if ((Status == EFI_BUFFER_TOO_SMALL) || (Status == EFI_SUCCESS)){\r | |
953 | // Hit in the Cache\r | |
954 | UpdateVariableInfo (VariableName, VendorGuid, FALSE, TRUE, FALSE, FALSE, TRUE);\r | |
fdb7765f | 955 | goto Done;\r |
33a5a666 A |
956 | }\r |
957 | \r | |
052ad7e1 | 958 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 959 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
960 | goto Done;\r | |
961 | }\r | |
33a5a666 | 962 | \r |
8d3a5c82 | 963 | //\r |
964 | // Get data size\r | |
965 | //\r | |
130e2569 | 966 | VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r |
fdb7765f | 967 | ASSERT (VarDataSize != 0);\r |
968 | \r | |
8d3a5c82 | 969 | if (*DataSize >= VarDataSize) {\r |
970 | if (Data == NULL) {\r | |
971 | Status = EFI_INVALID_PARAMETER;\r | |
972 | goto Done;\r | |
973 | }\r | |
974 | \r | |
975 | CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r | |
976 | if (Attributes != NULL) {\r | |
977 | *Attributes = Variable.CurrPtr->Attributes;\r | |
978 | }\r | |
979 | \r | |
980 | *DataSize = VarDataSize;\r | |
33a5a666 A |
981 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r |
982 | UpdateVariableCache (VariableName, VendorGuid, Variable.CurrPtr->Attributes, VarDataSize, Data);\r | |
983 | \r | |
8d3a5c82 | 984 | Status = EFI_SUCCESS;\r |
985 | goto Done;\r | |
986 | } else {\r | |
987 | *DataSize = VarDataSize;\r | |
988 | Status = EFI_BUFFER_TOO_SMALL;\r | |
989 | goto Done;\r | |
990 | }\r | |
991 | \r | |
992 | Done:\r | |
052ad7e1 | 993 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 994 | return Status;\r |
995 | }\r | |
996 | \r | |
052ad7e1 A |
997 | \r |
998 | \r | |
8d3a5c82 | 999 | /*++\r |
1000 | \r | |
1001 | Routine Description:\r | |
1002 | \r | |
1003 | This code Finds the Next available variable\r | |
1004 | \r | |
1005 | Arguments:\r | |
1006 | \r | |
1007 | VariableNameSize Size of the variable\r | |
1008 | VariableName Pointer to variable name\r | |
1009 | VendorGuid Variable Vendor Guid\r | |
1010 | Global VARIABLE_GLOBAL structure pointer.\r | |
1011 | Instance FV instance\r | |
1012 | \r | |
1013 | Returns:\r | |
1014 | \r | |
1015 | EFI STATUS\r | |
1016 | \r | |
1017 | --*/\r | |
052ad7e1 A |
1018 | EFI_STATUS\r |
1019 | EFIAPI\r | |
1020 | RuntimeServiceGetNextVariableName (\r | |
1021 | IN OUT UINTN *VariableNameSize,\r | |
1022 | IN OUT CHAR16 *VariableName,\r | |
1023 | IN OUT EFI_GUID *VendorGuid\r | |
1024 | )\r | |
8d3a5c82 | 1025 | {\r |
1026 | VARIABLE_POINTER_TRACK Variable;\r | |
1027 | UINTN VarNameSize;\r | |
1028 | EFI_STATUS Status;\r | |
1029 | \r | |
1030 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
1031 | return EFI_INVALID_PARAMETER;\r | |
1032 | }\r | |
1033 | \r | |
fdb7765f | 1034 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
1035 | \r | |
052ad7e1 | 1036 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
8d3a5c82 | 1037 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r |
1038 | goto Done;\r | |
1039 | }\r | |
1040 | \r | |
1041 | if (VariableName[0] != 0) {\r | |
1042 | //\r | |
1043 | // If variable name is not NULL, get next variable\r | |
1044 | //\r | |
1045 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
1046 | }\r | |
1047 | \r | |
1048 | while (TRUE) {\r | |
1049 | //\r | |
1050 | // If both volatile and non-volatile variable store are parsed,\r | |
1051 | // return not found\r | |
1052 | //\r | |
1053 | if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r | |
1054 | Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r | |
36873a61 | 1055 | if (!Variable.Volatile) {\r |
9cad030b | 1056 | Variable.StartPtr = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
1057 | Variable.EndPtr = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase));\r | |
8d3a5c82 | 1058 | } else {\r |
1059 | Status = EFI_NOT_FOUND;\r | |
1060 | goto Done;\r | |
1061 | }\r | |
1062 | \r | |
1063 | Variable.CurrPtr = Variable.StartPtr;\r | |
1064 | if (!IsValidVariableHeader (Variable.CurrPtr)) {\r | |
1065 | continue;\r | |
1066 | }\r | |
1067 | }\r | |
1068 | //\r | |
1069 | // Variable is found\r | |
1070 | //\r | |
1071 | if (IsValidVariableHeader (Variable.CurrPtr) && Variable.CurrPtr->State == VAR_ADDED) {\r | |
1072 | if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {\r | |
130e2569 | 1073 | VarNameSize = NameSizeOfVariable (Variable.CurrPtr);\r |
fdb7765f | 1074 | ASSERT (VarNameSize != 0);\r |
1075 | \r | |
8d3a5c82 | 1076 | if (VarNameSize <= *VariableNameSize) {\r |
1077 | CopyMem (\r | |
1078 | VariableName,\r | |
130e2569 | 1079 | GetVariableNamePtr (Variable.CurrPtr),\r |
8d3a5c82 | 1080 | VarNameSize\r |
1081 | );\r | |
1082 | CopyMem (\r | |
1083 | VendorGuid,\r | |
1084 | &Variable.CurrPtr->VendorGuid,\r | |
1085 | sizeof (EFI_GUID)\r | |
1086 | );\r | |
1087 | Status = EFI_SUCCESS;\r | |
1088 | } else {\r | |
1089 | Status = EFI_BUFFER_TOO_SMALL;\r | |
1090 | }\r | |
1091 | \r | |
1092 | *VariableNameSize = VarNameSize;\r | |
1093 | goto Done;\r | |
1094 | }\r | |
1095 | }\r | |
1096 | \r | |
1097 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
1098 | }\r | |
1099 | \r | |
1100 | Done:\r | |
052ad7e1 | 1101 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1102 | return Status;\r |
1103 | }\r | |
1104 | \r | |
052ad7e1 | 1105 | \r |
8d3a5c82 | 1106 | /*++\r |
1107 | \r | |
1108 | Routine Description:\r | |
1109 | \r | |
1110 | This code sets variable in storage blocks (Volatile or Non-Volatile)\r | |
1111 | \r | |
1112 | Arguments:\r | |
1113 | \r | |
1114 | VariableName Name of Variable to be found\r | |
1115 | VendorGuid Variable vendor GUID\r | |
1116 | Attributes Attribute value of the variable found\r | |
1117 | DataSize Size of Data found. If size is less than the\r | |
1118 | data, this value contains the required size.\r | |
1119 | Data Data pointer\r | |
1120 | Global Pointer to VARIABLE_GLOBAL structure\r | |
1121 | VolatileOffset The offset of last volatile variable\r | |
1122 | NonVolatileOffset The offset of last non-volatile variable\r | |
1123 | Instance Instance of the Firmware Volume.\r | |
1124 | \r | |
1125 | Returns:\r | |
1126 | \r | |
8d3a5c82 | 1127 | EFI_INVALID_PARAMETER - Invalid parameter\r |
1128 | EFI_SUCCESS - Set successfully\r | |
1129 | EFI_OUT_OF_RESOURCES - Resource not enough to set variable\r | |
1130 | EFI_NOT_FOUND - Not found\r | |
c6492839 | 1131 | EFI_DEVICE_ERROR - Variable can not be saved due to hardware failure\r |
1132 | EFI_WRITE_PROTECTED - Variable is read-only\r | |
8d3a5c82 | 1133 | \r |
1134 | --*/\r | |
052ad7e1 A |
1135 | EFI_STATUS\r |
1136 | EFIAPI\r | |
1137 | RuntimeServiceSetVariable (\r | |
1138 | IN CHAR16 *VariableName,\r | |
1139 | IN EFI_GUID *VendorGuid,\r | |
1140 | IN UINT32 Attributes,\r | |
1141 | IN UINTN DataSize,\r | |
1142 | IN VOID *Data\r | |
1143 | )\r | |
8d3a5c82 | 1144 | {\r |
1145 | VARIABLE_POINTER_TRACK Variable;\r | |
1146 | EFI_STATUS Status;\r | |
1147 | VARIABLE_HEADER *NextVariable;\r | |
1148 | UINTN VarNameSize;\r | |
1149 | UINTN VarNameOffset;\r | |
1150 | UINTN VarDataOffset;\r | |
1151 | UINTN VarSize;\r | |
1152 | UINT8 State;\r | |
1153 | BOOLEAN Reclaimed;\r | |
052ad7e1 A |
1154 | UINTN *VolatileOffset;\r |
1155 | UINTN *NonVolatileOffset;\r | |
1156 | UINT32 Instance;\r | |
fd51bf70 | 1157 | BOOLEAN Volatile;\r |
fdb7765f | 1158 | EFI_PHYSICAL_ADDRESS Point;\r |
8d3a5c82 | 1159 | \r |
c6492839 | 1160 | //\r |
1161 | // Check input parameters\r | |
1162 | //\r | |
8d3a5c82 | 1163 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r |
1164 | return EFI_INVALID_PARAMETER;\r | |
c6492839 | 1165 | } \r |
1166 | //\r | |
1167 | // Make sure if runtime bit is set, boot service bit is set also\r | |
1168 | //\r | |
1169 | if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r | |
1170 | return EFI_INVALID_PARAMETER;\r | |
8d3a5c82 | 1171 | }\r |
fdb7765f | 1172 | \r |
c6492839 | 1173 | //\r |
1174 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1175 | // the DataSize is limited to maximum size of MAX_HARDWARE_ERROR_VARIABLE_SIZE (32K)\r | |
1176 | // bytes for HwErrRec, and MAX_VARIABLE_SIZE (1024) bytes for the others.\r | |
1177 | //\r | |
1178 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1179 | if ((DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE) || \r | |
1180 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_HARDWARE_ERROR_VARIABLE_SIZE)) {\r | |
1181 | return EFI_INVALID_PARAMETER;\r | |
1182 | } \r | |
1183 | } else {\r | |
1184 | //\r | |
1185 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
1186 | // the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.\r | |
1187 | //\r | |
1188 | if ((DataSize > MAX_VARIABLE_SIZE) ||\r | |
1189 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_VARIABLE_SIZE)) {\r | |
1190 | return EFI_INVALID_PARAMETER;\r | |
1191 | } \r | |
1192 | } \r | |
fdb7765f | 1193 | \r |
1194 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1195 | \r | |
1196 | Reclaimed = FALSE;\r | |
1197 | Instance = mVariableModuleGlobal->FvbInstance;\r | |
1198 | VolatileOffset = &mVariableModuleGlobal->VolatileLastVariableOffset;\r | |
1199 | \r | |
1200 | //\r | |
1201 | // Consider reentrant in MCA/INIT/NMI. It needs be reupdated;\r | |
1202 | //\r | |
1203 | if (1 < InterlockedIncrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState)) {\r | |
fdb7765f | 1204 | Point = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;;\r |
1205 | //\r | |
1206 | // Parse non-volatile variable data and get last variable offset\r | |
1207 | //\r | |
9cad030b | 1208 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point);\r |
fdb7765f | 1209 | while (IsValidVariableHeader (NextVariable)) {\r |
1210 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1211 | }\r | |
1212 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) Point;\r | |
1213 | }\r | |
1214 | \r | |
1215 | NonVolatileOffset = &mVariableModuleGlobal->NonVolatileLastVariableOffset;\r | |
1216 | \r | |
1217 | \r | |
c6492839 | 1218 | //\r |
1219 | // Check whether the input variable is already existed\r | |
1220 | //\r | |
1221 | \r | |
052ad7e1 | 1222 | Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r |
c6492839 | 1223 | if (Status == EFI_SUCCESS && Variable.CurrPtr != NULL) {\r |
8d3a5c82 | 1224 | //\r |
c6492839 | 1225 | // Update/Delete existing variable\r |
8d3a5c82 | 1226 | //\r |
fd51bf70 | 1227 | Volatile = Variable.Volatile;\r |
c6492839 | 1228 | \r |
1229 | if (EfiAtRuntime ()) { \r | |
1230 | //\r | |
1231 | // If EfiAtRuntime and the variable is Volatile and Runtime Access, \r | |
1232 | // the volatile is ReadOnly, and SetVariable should be aborted and \r | |
1233 | // return EFI_WRITE_PROTECTED.\r | |
1234 | //\r | |
1235 | if (Variable.Volatile) {\r | |
1236 | Status = EFI_WRITE_PROTECTED;\r | |
1237 | goto Done;\r | |
1238 | }\r | |
1239 | //\r | |
1240 | // Only variable have NV attribute can be updated/deleted in Runtime\r | |
1241 | //\r | |
1242 | if (!(Variable.CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE)) {\r | |
1243 | Status = EFI_INVALID_PARAMETER;\r | |
1244 | goto Done; \r | |
1245 | }\r | |
1246 | }\r | |
8d3a5c82 | 1247 | //\r |
c6492839 | 1248 | // Setting a data variable with no access, or zero DataSize attributes\r |
1249 | // specified causes it to be deleted.\r | |
8d3a5c82 | 1250 | //\r |
c6492839 | 1251 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) { \r |
1252 | State = Variable.CurrPtr->State;\r | |
1253 | State &= VAR_DELETED;\r | |
1254 | \r | |
1255 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1256 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1257 | Variable.Volatile,\r |
1258 | FALSE,\r | |
1259 | Instance,\r | |
1260 | (UINTN) &Variable.CurrPtr->State,\r | |
1261 | sizeof (UINT8),\r | |
1262 | &State\r | |
1263 | ); \r | |
33a5a666 | 1264 | if (!EFI_ERROR (Status)) {\r |
fd51bf70 | 1265 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, FALSE, TRUE, FALSE);\r |
33a5a666 A |
1266 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1267 | }\r | |
c6492839 | 1268 | goto Done; \r |
1269 | }\r | |
8d3a5c82 | 1270 | //\r |
c6492839 | 1271 | // If the variable is marked valid and the same data has been passed in\r |
1272 | // then return to the caller immediately.\r | |
8d3a5c82 | 1273 | //\r |
130e2569 | 1274 | if (DataSizeOfVariable (Variable.CurrPtr) == DataSize &&\r |
c6492839 | 1275 | (CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize) == 0)) {\r |
33a5a666 | 1276 | \r |
fd51bf70 | 1277 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
c6492839 | 1278 | Status = EFI_SUCCESS;\r |
1279 | goto Done;\r | |
1280 | } else if ((Variable.CurrPtr->State == VAR_ADDED) ||\r | |
1281 | (Variable.CurrPtr->State == (VAR_ADDED & VAR_IN_DELETED_TRANSITION))) {\r | |
1282 | //\r | |
1283 | // Mark the old variable as in delete transition\r | |
1284 | //\r | |
1285 | State = Variable.CurrPtr->State;\r | |
1286 | State &= VAR_IN_DELETED_TRANSITION;\r | |
1287 | \r | |
1288 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1289 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1290 | Variable.Volatile,\r |
1291 | FALSE,\r | |
1292 | Instance,\r | |
1293 | (UINTN) &Variable.CurrPtr->State,\r | |
1294 | sizeof (UINT8),\r | |
1295 | &State\r | |
1296 | ); \r | |
1297 | if (EFI_ERROR (Status)) {\r | |
1298 | goto Done; \r | |
33a5a666 | 1299 | } \r |
c6492839 | 1300 | } \r |
1301 | } else if (Status == EFI_NOT_FOUND) {\r | |
8d3a5c82 | 1302 | //\r |
c6492839 | 1303 | // Create a new variable\r |
1304 | // \r | |
1305 | \r | |
8d3a5c82 | 1306 | //\r |
c6492839 | 1307 | // Make sure we are trying to create a new variable.\r |
1308 | // Setting a data variable with no access, or zero DataSize attributes means to delete it. \r | |
8d3a5c82 | 1309 | //\r |
c6492839 | 1310 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r |
1311 | Status = EFI_NOT_FOUND;\r | |
1312 | goto Done;\r | |
1313 | }\r | |
1314 | \r | |
8d3a5c82 | 1315 | //\r |
c6492839 | 1316 | // Only variable have NV|RT attribute can be created in Runtime\r |
1317 | //\r | |
1318 | if (EfiAtRuntime () &&\r | |
1319 | (!(Attributes & EFI_VARIABLE_RUNTIME_ACCESS) || !(Attributes & EFI_VARIABLE_NON_VOLATILE))) {\r | |
1320 | Status = EFI_INVALID_PARAMETER;\r | |
1321 | goto Done;\r | |
1322 | } \r | |
1323 | } else {\r | |
8d3a5c82 | 1324 | //\r |
c6492839 | 1325 | // Status should be EFI_INVALID_PARAMETER here according to return status of FindVariable().\r |
8d3a5c82 | 1326 | //\r |
c6492839 | 1327 | ASSERT (Status == EFI_INVALID_PARAMETER);\r |
8d3a5c82 | 1328 | goto Done;\r |
c6492839 | 1329 | }\r |
1330 | \r | |
1331 | //\r | |
1332 | // Function part - create a new variable and copy the data.\r | |
1333 | // Both update a variable and create a variable will come here.\r | |
1334 | //\r | |
1335 | // Tricky part: Use scratch data area at the end of volatile variable store\r | |
1336 | // as a temporary storage.\r | |
1337 | //\r | |
052ad7e1 | 1338 | NextVariable = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r |
c6492839 | 1339 | \r |
1340 | SetMem (NextVariable, SCRATCH_SIZE, 0xff);\r | |
1341 | \r | |
1342 | NextVariable->StartId = VARIABLE_DATA;\r | |
1343 | NextVariable->Attributes = Attributes;\r | |
1344 | //\r | |
1345 | // NextVariable->State = VAR_ADDED;\r | |
1346 | //\r | |
1347 | NextVariable->Reserved = 0;\r | |
1348 | VarNameOffset = sizeof (VARIABLE_HEADER);\r | |
1349 | VarNameSize = StrSize (VariableName);\r | |
1350 | CopyMem (\r | |
1351 | (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r | |
1352 | VariableName,\r | |
1353 | VarNameSize\r | |
1354 | );\r | |
1355 | VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
1356 | CopyMem (\r | |
1357 | (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r | |
1358 | Data,\r | |
1359 | DataSize\r | |
1360 | );\r | |
1361 | CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r | |
1362 | //\r | |
1363 | // There will be pad bytes after Data, the NextVariable->NameSize and\r | |
1364 | // NextVariable->DataSize should not include pad size so that variable\r | |
1365 | // service can get actual size in GetVariable\r | |
1366 | //\r | |
1367 | NextVariable->NameSize = (UINT32)VarNameSize;\r | |
1368 | NextVariable->DataSize = (UINT32)DataSize;\r | |
1369 | \r | |
1370 | //\r | |
1371 | // The actual size of the variable that stores in storage should\r | |
1372 | // include pad size.\r | |
1373 | //\r | |
1374 | VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);\r | |
1375 | if (Attributes & EFI_VARIABLE_NON_VOLATILE) {\r | |
8d3a5c82 | 1376 | //\r |
c6492839 | 1377 | // Create a nonvolatile variable\r |
8d3a5c82 | 1378 | //\r |
fd51bf70 | 1379 | Volatile = FALSE;\r |
c6492839 | 1380 | \r |
1381 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r | |
052ad7e1 | 1382 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
c6492839 | 1383 | ) {\r |
1384 | if (EfiAtRuntime ()) {\r | |
1385 | Status = EFI_OUT_OF_RESOURCES;\r | |
1386 | goto Done;\r | |
1387 | }\r | |
1388 | //\r | |
1389 | // Perform garbage collection & reclaim operation\r | |
1390 | //\r | |
052ad7e1 | 1391 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase, NonVolatileOffset, FALSE);\r |
8d3a5c82 | 1392 | if (EFI_ERROR (Status)) {\r |
1393 | goto Done;\r | |
1394 | }\r | |
8d3a5c82 | 1395 | //\r |
c6492839 | 1396 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1397 | //\r |
c6492839 | 1398 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r |
052ad7e1 | 1399 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size\r |
8d3a5c82 | 1400 | ) {\r |
c6492839 | 1401 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1402 | goto Done;\r |
8d3a5c82 | 1403 | }\r |
c6492839 | 1404 | \r |
1405 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1406 | }\r |
1407 | //\r | |
c6492839 | 1408 | // Three steps\r |
1409 | // 1. Write variable header\r | |
130e2569 | 1410 | // 2. Set variable state to header valid \r |
1411 | // 3. Write variable data\r | |
1412 | // 4. Set variable state to valid\r | |
8d3a5c82 | 1413 | //\r |
8d3a5c82 | 1414 | //\r |
c6492839 | 1415 | // Step 1:\r |
8d3a5c82 | 1416 | //\r |
c6492839 | 1417 | Status = UpdateVariableStore (\r |
052ad7e1 | 1418 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1419 | FALSE,\r |
1420 | TRUE,\r | |
1421 | Instance,\r | |
1422 | *NonVolatileOffset,\r | |
1423 | sizeof (VARIABLE_HEADER),\r | |
1424 | (UINT8 *) NextVariable\r | |
1425 | );\r | |
1426 | \r | |
1427 | if (EFI_ERROR (Status)) {\r | |
1428 | goto Done;\r | |
1429 | }\r | |
130e2569 | 1430 | \r |
8d3a5c82 | 1431 | //\r |
c6492839 | 1432 | // Step 2:\r |
8d3a5c82 | 1433 | //\r |
130e2569 | 1434 | NextVariable->State = VAR_HEADER_VALID_ONLY;\r |
1435 | Status = UpdateVariableStore (\r | |
1436 | &mVariableModuleGlobal->VariableGlobal,\r | |
1437 | FALSE,\r | |
1438 | TRUE,\r | |
1439 | Instance,\r | |
1440 | *NonVolatileOffset,\r | |
1441 | sizeof (VARIABLE_HEADER),\r | |
1442 | (UINT8 *) NextVariable\r | |
1443 | );\r | |
1444 | \r | |
1445 | if (EFI_ERROR (Status)) {\r | |
1446 | goto Done;\r | |
1447 | }\r | |
1448 | //\r | |
1449 | // Step 3:\r | |
1450 | //\r | |
c6492839 | 1451 | Status = UpdateVariableStore (\r |
052ad7e1 | 1452 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1453 | FALSE,\r |
1454 | TRUE,\r | |
1455 | Instance,\r | |
1456 | *NonVolatileOffset + sizeof (VARIABLE_HEADER),\r | |
1457 | (UINT32) VarSize - sizeof (VARIABLE_HEADER),\r | |
1458 | (UINT8 *) NextVariable + sizeof (VARIABLE_HEADER)\r | |
1459 | );\r | |
1460 | \r | |
1461 | if (EFI_ERROR (Status)) {\r | |
1462 | goto Done;\r | |
1463 | }\r | |
8d3a5c82 | 1464 | //\r |
130e2569 | 1465 | // Step 4:\r |
8d3a5c82 | 1466 | //\r |
c6492839 | 1467 | NextVariable->State = VAR_ADDED;\r |
1468 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1469 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1470 | FALSE,\r |
1471 | TRUE,\r | |
1472 | Instance,\r | |
1473 | *NonVolatileOffset,\r | |
1474 | sizeof (VARIABLE_HEADER),\r | |
1475 | (UINT8 *) NextVariable\r | |
1476 | );\r | |
1477 | \r | |
1478 | if (EFI_ERROR (Status)) {\r | |
1479 | goto Done;\r | |
1480 | }\r | |
8d3a5c82 | 1481 | \r |
9cad030b | 1482 | *NonVolatileOffset = HEADER_ALIGN (*NonVolatileOffset + VarSize);\r |
8d3a5c82 | 1483 | \r |
c6492839 | 1484 | } else {\r |
1485 | //\r | |
1486 | // Create a volatile variable\r | |
1487 | // \r | |
fd51bf70 | 1488 | Volatile = TRUE;\r |
c6492839 | 1489 | \r |
1490 | if ((UINT32) (VarSize +*VolatileOffset) >\r | |
052ad7e1 | 1491 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size) {\r |
8d3a5c82 | 1492 | //\r |
c6492839 | 1493 | // Perform garbage collection & reclaim operation\r |
8d3a5c82 | 1494 | //\r |
052ad7e1 | 1495 | Status = Reclaim (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase, VolatileOffset, TRUE);\r |
8d3a5c82 | 1496 | if (EFI_ERROR (Status)) {\r |
1497 | goto Done;\r | |
1498 | }\r | |
1499 | //\r | |
c6492839 | 1500 | // If still no enough space, return out of resources\r |
8d3a5c82 | 1501 | //\r |
8d3a5c82 | 1502 | if ((UINT32) (VarSize +*VolatileOffset) >\r |
052ad7e1 | 1503 | ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size\r |
8d3a5c82 | 1504 | ) {\r |
c6492839 | 1505 | Status = EFI_OUT_OF_RESOURCES;\r |
8d3a5c82 | 1506 | goto Done;\r |
1507 | }\r | |
c6492839 | 1508 | \r |
1509 | Reclaimed = TRUE;\r | |
8d3a5c82 | 1510 | }\r |
8d3a5c82 | 1511 | \r |
c6492839 | 1512 | NextVariable->State = VAR_ADDED;\r |
1513 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1514 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1515 | TRUE,\r |
1516 | TRUE,\r | |
1517 | Instance,\r | |
1518 | *VolatileOffset,\r | |
1519 | (UINT32) VarSize,\r | |
1520 | (UINT8 *) NextVariable\r | |
1521 | );\r | |
1522 | \r | |
1523 | if (EFI_ERROR (Status)) {\r | |
1524 | goto Done;\r | |
8d3a5c82 | 1525 | }\r |
c6492839 | 1526 | \r |
9cad030b | 1527 | *VolatileOffset = HEADER_ALIGN (*VolatileOffset + VarSize);\r |
c6492839 | 1528 | }\r |
1529 | //\r | |
1530 | // Mark the old variable as deleted\r | |
1531 | //\r | |
1532 | if (!Reclaimed && !EFI_ERROR (Status) && Variable.CurrPtr != NULL) {\r | |
1533 | State = Variable.CurrPtr->State;\r | |
1534 | State &= VAR_DELETED;\r | |
1535 | \r | |
1536 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1537 | &mVariableModuleGlobal->VariableGlobal,\r |
c6492839 | 1538 | Variable.Volatile,\r |
1539 | FALSE,\r | |
1540 | Instance,\r | |
1541 | (UINTN) &Variable.CurrPtr->State,\r | |
1542 | sizeof (UINT8),\r | |
1543 | &State\r | |
1544 | );\r | |
33a5a666 A |
1545 | \r |
1546 | if (!EFI_ERROR (Status)) {\r | |
fd51bf70 | 1547 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1548 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1549 | }\r | |
c6492839 | 1550 | goto Done; \r |
8d3a5c82 | 1551 | }\r |
1552 | \r | |
1553 | Status = EFI_SUCCESS;\r | |
fd51bf70 | 1554 | UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);\r |
33a5a666 A |
1555 | UpdateVariableCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r |
1556 | \r | |
8d3a5c82 | 1557 | Done:\r |
fdb7765f | 1558 | InterlockedDecrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState);\r |
052ad7e1 | 1559 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
fdb7765f | 1560 | \r |
8d3a5c82 | 1561 | return Status;\r |
1562 | }\r | |
1563 | \r | |
052ad7e1 | 1564 | \r |
8d3a5c82 | 1565 | /*++\r |
1566 | \r | |
1567 | Routine Description:\r | |
1568 | \r | |
1569 | This code returns information about the EFI variables.\r | |
1570 | \r | |
1571 | Arguments:\r | |
1572 | \r | |
1573 | Attributes Attributes bitmask to specify the type of variables\r | |
1574 | on which to return information.\r | |
1575 | MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
1576 | for the EFI variables associated with the attributes specified.\r | |
1577 | RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
c6492839 | 1578 | for EFI variables associated with the attributes specified.\r |
1579 | MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
8d3a5c82 | 1580 | associated with the attributes specified.\r |
1581 | Global Pointer to VARIABLE_GLOBAL structure.\r | |
1582 | Instance Instance of the Firmware Volume.\r | |
1583 | \r | |
1584 | Returns:\r | |
1585 | \r | |
1586 | EFI STATUS\r | |
1587 | EFI_INVALID_PARAMETER - An invalid combination of attribute bits was supplied.\r | |
1588 | EFI_SUCCESS - Query successfully.\r | |
1589 | EFI_UNSUPPORTED - The attribute is not supported on this platform.\r | |
1590 | \r | |
1591 | --*/\r | |
052ad7e1 A |
1592 | EFI_STATUS\r |
1593 | EFIAPI\r | |
1594 | RuntimeServiceQueryVariableInfo (\r | |
1595 | IN UINT32 Attributes,\r | |
1596 | OUT UINT64 *MaximumVariableStorageSize,\r | |
1597 | OUT UINT64 *RemainingVariableStorageSize,\r | |
1598 | OUT UINT64 *MaximumVariableSize\r | |
1599 | )\r | |
8d3a5c82 | 1600 | {\r |
1601 | VARIABLE_HEADER *Variable;\r | |
1602 | VARIABLE_HEADER *NextVariable;\r | |
1603 | UINT64 VariableSize;\r | |
1604 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1605 | \r | |
c6492839 | 1606 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
8d3a5c82 | 1607 | return EFI_INVALID_PARAMETER;\r |
1608 | }\r | |
c6492839 | 1609 | \r |
1610 | if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {\r | |
8d3a5c82 | 1611 | //\r |
1612 | // Make sure the Attributes combination is supported by the platform.\r | |
1613 | //\r | |
c6492839 | 1614 | return EFI_UNSUPPORTED; \r |
8d3a5c82 | 1615 | } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r |
1616 | //\r | |
1617 | // Make sure if runtime bit is set, boot service bit is set also.\r | |
1618 | //\r | |
1619 | return EFI_INVALID_PARAMETER;\r | |
1620 | } else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r | |
1621 | //\r | |
1622 | // Make sure RT Attribute is set if we are in Runtime phase.\r | |
1623 | //\r | |
1624 | return EFI_INVALID_PARAMETER;\r | |
1625 | }\r | |
1626 | \r | |
052ad7e1 | 1627 | AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1628 | \r |
1629 | if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r | |
1630 | //\r | |
1631 | // Query is Volatile related.\r | |
1632 | //\r | |
052ad7e1 | 1633 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);\r |
8d3a5c82 | 1634 | } else {\r |
1635 | //\r | |
1636 | // Query is Non-Volatile related.\r | |
1637 | //\r | |
052ad7e1 | 1638 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1639 | }\r |
1640 | \r | |
1641 | //\r | |
1642 | // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize\r | |
1643 | // with the storage size (excluding the storage header size).\r | |
1644 | //\r | |
1645 | *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1646 | *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
1647 | \r | |
1648 | //\r | |
c6492839 | 1649 | // Let *MaximumVariableSize be MAX_VARIABLE_SIZE with the exception of the variable header size.\r |
8d3a5c82 | 1650 | //\r |
c6492839 | 1651 | *MaximumVariableSize = MAX_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r |
1652 | \r | |
1653 | //\r | |
1654 | // Harware error record variable needs larger size.\r | |
1655 | //\r | |
1656 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
1657 | *MaximumVariableSize = MAX_HARDWARE_ERROR_VARIABLE_SIZE - sizeof (VARIABLE_HEADER);\r | |
1658 | }\r | |
8d3a5c82 | 1659 | \r |
1660 | //\r | |
1661 | // Point to the starting address of the variables.\r | |
1662 | //\r | |
9cad030b | 1663 | Variable = GetStartPointer (VariableStoreHeader);\r |
8d3a5c82 | 1664 | \r |
1665 | //\r | |
1666 | // Now walk through the related variable store.\r | |
1667 | //\r | |
1668 | while (IsValidVariableHeader (Variable) && (Variable < GetEndPointer (VariableStoreHeader))) {\r | |
1669 | NextVariable = GetNextVariablePtr (Variable);\r | |
1670 | VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r | |
1671 | \r | |
1672 | if (EfiAtRuntime ()) {\r | |
1673 | //\r | |
1674 | // we don't take the state of the variables in mind\r | |
1675 | // when calculating RemainingVariableStorageSize,\r | |
1676 | // since the space occupied by variables not marked with\r | |
1677 | // VAR_ADDED is not allowed to be reclaimed in Runtime.\r | |
1678 | //\r | |
1679 | *RemainingVariableStorageSize -= VariableSize;\r | |
1680 | } else {\r | |
1681 | //\r | |
1682 | // Only care about Variables with State VAR_ADDED,because\r | |
1683 | // the space not marked as VAR_ADDED is reclaimable now.\r | |
1684 | //\r | |
1685 | if (Variable->State == VAR_ADDED) {\r | |
1686 | *RemainingVariableStorageSize -= VariableSize;\r | |
1687 | }\r | |
1688 | }\r | |
1689 | \r | |
1690 | //\r | |
1691 | // Go to the next one\r | |
1692 | //\r | |
1693 | Variable = NextVariable;\r | |
1694 | }\r | |
1695 | \r | |
c6492839 | 1696 | if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {\r |
1697 | *MaximumVariableSize = 0;\r | |
1698 | } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {\r | |
1699 | *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);\r | |
1700 | }\r | |
1701 | \r | |
052ad7e1 | 1702 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r |
8d3a5c82 | 1703 | return EFI_SUCCESS;\r |
1704 | }\r | |
1705 | \r | |
7800593d LG |
1706 | VOID\r |
1707 | EFIAPI\r | |
1708 | ReclaimForOS(\r | |
1709 | EFI_EVENT Event,\r | |
1710 | VOID *Context\r | |
1711 | )\r | |
1712 | {\r | |
1713 | UINT32 VarSize;\r | |
1714 | EFI_STATUS Status;\r | |
1715 | \r | |
1716 | VarSize = ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase))->Size;\r | |
1717 | Status = EFI_SUCCESS; \r | |
1718 | \r | |
1719 | //\r | |
1720 | // Check if the free area is blow a threshold\r | |
1721 | //\r | |
1722 | if ((VarSize - mVariableModuleGlobal->NonVolatileLastVariableOffset) < VARIABLE_RECLAIM_THRESHOLD) {\r | |
1723 | Status = Reclaim (\r | |
1724 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r | |
1725 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r | |
1726 | FALSE\r | |
1727 | );\r | |
1728 | ASSERT_EFI_ERROR (Status);\r | |
1729 | }\r | |
1730 | }\r | |
1731 | \r | |
8d3a5c82 | 1732 | EFI_STATUS\r |
8d3a5c82 | 1733 | VariableCommonInitialize (\r |
1734 | IN EFI_HANDLE ImageHandle,\r | |
1735 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1736 | )\r | |
1737 | /*++\r | |
1738 | \r | |
1739 | Routine Description:\r | |
1740 | This function does common initialization for variable services\r | |
1741 | \r | |
1742 | Arguments:\r | |
1743 | \r | |
1744 | ImageHandle - The firmware allocated handle for the EFI image.\r | |
1745 | SystemTable - A pointer to the EFI System Table.\r | |
1746 | \r | |
1747 | Returns:\r | |
1748 | \r | |
1749 | Status code.\r | |
1750 | \r | |
1751 | EFI_NOT_FOUND - Variable store area not found.\r | |
1752 | EFI_UNSUPPORTED - Currently only one non-volatile variable store is supported.\r | |
1753 | EFI_SUCCESS - Variable services successfully initialized.\r | |
1754 | \r | |
1755 | --*/\r | |
1756 | {\r | |
1757 | EFI_STATUS Status;\r | |
1758 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
1759 | CHAR8 *CurrPtr;\r | |
1760 | VARIABLE_STORE_HEADER *VolatileVariableStore;\r | |
1761 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
1762 | VARIABLE_HEADER *NextVariable;\r | |
1763 | UINT32 Instance;\r | |
1764 | EFI_PHYSICAL_ADDRESS FvVolHdr;\r | |
8d3a5c82 | 1765 | UINT64 TempVariableStoreHeader;\r |
8d3a5c82 | 1766 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r |
8d3a5c82 | 1767 | UINT64 BaseAddress;\r |
1768 | UINT64 Length;\r | |
1769 | UINTN Index;\r | |
1770 | UINT8 Data;\r | |
052ad7e1 A |
1771 | UINT64 VariableStoreBase;\r |
1772 | UINT64 VariableStoreLength;\r | |
7800593d | 1773 | EFI_EVENT ReadyToBootEvent;\r |
8d3a5c82 | 1774 | \r |
7800593d LG |
1775 | Status = EFI_SUCCESS;\r |
1776 | //\r | |
1777 | // Allocate runtime memory for variable driver global structure.\r | |
1778 | //\r | |
1779 | mVariableModuleGlobal = AllocateRuntimePool (sizeof (VARIABLE_MODULE_GLOBAL));\r | |
1780 | if (mVariableModuleGlobal == NULL) {\r | |
1781 | return EFI_OUT_OF_RESOURCES;\r | |
1782 | }\r | |
8d3a5c82 | 1783 | \r |
052ad7e1 | 1784 | EfiInitializeLock(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock, TPL_NOTIFY);\r |
fdb7765f | 1785 | mVariableModuleGlobal->VariableGlobal.ReentrantState = 0;\r |
8d3a5c82 | 1786 | \r |
1787 | //\r | |
1788 | // Allocate memory for volatile variable store\r | |
1789 | //\r | |
1790 | VolatileVariableStore = AllocateRuntimePool (VARIABLE_STORE_SIZE + SCRATCH_SIZE);\r | |
1791 | if (VolatileVariableStore == NULL) {\r | |
1792 | FreePool (mVariableModuleGlobal);\r | |
1793 | return EFI_OUT_OF_RESOURCES;\r | |
1794 | }\r | |
1795 | \r | |
1796 | SetMem (VolatileVariableStore, VARIABLE_STORE_SIZE + SCRATCH_SIZE, 0xff);\r | |
1797 | \r | |
1798 | //\r | |
1799 | // Variable Specific Data\r | |
1800 | //\r | |
052ad7e1 | 1801 | mVariableModuleGlobal->VariableGlobal.VolatileVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VolatileVariableStore;\r |
9cad030b | 1802 | mVariableModuleGlobal->VolatileLastVariableOffset = (UINTN) GetStartPointer (VolatileVariableStore) - (UINTN) VolatileVariableStore;\r |
8d3a5c82 | 1803 | \r |
1804 | VolatileVariableStore->Signature = VARIABLE_STORE_SIGNATURE;\r | |
1805 | VolatileVariableStore->Size = VARIABLE_STORE_SIZE;\r | |
1806 | VolatileVariableStore->Format = VARIABLE_STORE_FORMATTED;\r | |
1807 | VolatileVariableStore->State = VARIABLE_STORE_HEALTHY;\r | |
1808 | VolatileVariableStore->Reserved = 0;\r | |
1809 | VolatileVariableStore->Reserved1 = 0;\r | |
1810 | \r | |
1811 | //\r | |
1812 | // Get non volatile varaible store\r | |
1813 | //\r | |
1814 | \r | |
1815 | TempVariableStoreHeader = (UINT64) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
052ad7e1 | 1816 | VariableStoreBase = TempVariableStoreHeader + \\r |
8d3a5c82 | 1817 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
052ad7e1 | 1818 | VariableStoreLength = (UINT64) PcdGet32 (PcdFlashNvStorageVariableSize) - \\r |
8d3a5c82 | 1819 | (((EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) (TempVariableStoreHeader)) -> HeaderLength);\r |
1820 | //\r | |
1821 | // Mark the variable storage region of the FLASH as RUNTIME\r | |
1822 | //\r | |
052ad7e1 A |
1823 | BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK);\r |
1824 | Length = VariableStoreLength + (VariableStoreBase - BaseAddress);\r | |
8d3a5c82 | 1825 | Length = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK);\r |
1826 | \r | |
1827 | Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);\r | |
1828 | if (EFI_ERROR (Status)) {\r | |
7800593d | 1829 | goto Done;\r |
8d3a5c82 | 1830 | }\r |
1831 | \r | |
1832 | Status = gDS->SetMemorySpaceAttributes (\r | |
1833 | BaseAddress,\r | |
1834 | Length,\r | |
1835 | GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME\r | |
1836 | );\r | |
1837 | if (EFI_ERROR (Status)) {\r | |
7800593d | 1838 | goto Done;\r |
8d3a5c82 | 1839 | }\r |
1840 | //\r | |
1841 | // Get address of non volatile variable store base\r | |
1842 | //\r | |
052ad7e1 | 1843 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;\r |
8d3a5c82 | 1844 | \r |
1845 | //\r | |
1846 | // Check Integrity\r | |
1847 | //\r | |
1848 | //\r | |
1849 | // Find the Correct Instance of the FV Block Service.\r | |
1850 | //\r | |
1851 | Instance = 0;\r | |
052ad7e1 | 1852 | CurrPtr = (CHAR8 *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r |
8d3a5c82 | 1853 | while (EfiFvbGetPhysicalAddress (Instance, &FvVolHdr) == EFI_SUCCESS) {\r |
1854 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);\r | |
1855 | if (CurrPtr >= (CHAR8 *) FwVolHeader && CurrPtr < (((CHAR8 *) FwVolHeader) + FwVolHeader->FvLength)) {\r | |
1856 | mVariableModuleGlobal->FvbInstance = Instance;\r | |
1857 | break;\r | |
1858 | }\r | |
1859 | \r | |
1860 | Instance++;\r | |
1861 | }\r | |
1862 | \r | |
1863 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) CurrPtr;\r | |
1864 | if (GetVariableStoreStatus (VariableStoreHeader) == EfiValid) {\r | |
1865 | if (~VariableStoreHeader->Size == 0) {\r | |
1866 | Status = UpdateVariableStore (\r | |
052ad7e1 | 1867 | &mVariableModuleGlobal->VariableGlobal,\r |
8d3a5c82 | 1868 | FALSE,\r |
1869 | FALSE,\r | |
1870 | mVariableModuleGlobal->FvbInstance,\r | |
1871 | (UINTN) &VariableStoreHeader->Size,\r | |
1872 | sizeof (UINT32),\r | |
052ad7e1 | 1873 | (UINT8 *) &VariableStoreLength\r |
8d3a5c82 | 1874 | );\r |
1875 | //\r | |
1876 | // As Variables are stored in NV storage, which are slow devices,such as flash.\r | |
1877 | // Variable operation may skip checking variable program result to improve performance,\r | |
1878 | // We can assume Variable program is OK through some check point.\r | |
1879 | // Variable Store Size Setting should be the first Variable write operation,\r | |
1880 | // We can assume all Read/Write is OK if we can set Variable store size successfully.\r | |
1881 | // If write fail, we will assert here\r | |
1882 | //\r | |
052ad7e1 | 1883 | ASSERT(VariableStoreHeader->Size == VariableStoreLength);\r |
8d3a5c82 | 1884 | \r |
1885 | if (EFI_ERROR (Status)) {\r | |
7800593d | 1886 | goto Done;\r |
8d3a5c82 | 1887 | }\r |
1888 | }\r | |
1889 | \r | |
052ad7e1 | 1890 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = (EFI_PHYSICAL_ADDRESS) ((UINTN) CurrPtr);\r |
8d3a5c82 | 1891 | //\r |
1892 | // Parse non-volatile variable data and get last variable offset\r | |
1893 | //\r | |
9cad030b | 1894 | NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) CurrPtr);\r |
8d3a5c82 | 1895 | Status = EFI_SUCCESS;\r |
1896 | \r | |
1897 | while (IsValidVariableHeader (NextVariable)) {\r | |
1898 | NextVariable = GetNextVariablePtr (NextVariable);\r | |
1899 | }\r | |
1900 | \r | |
1901 | mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) CurrPtr;\r | |
1902 | \r | |
8d3a5c82 | 1903 | //\r |
1904 | // Check if the free area is really free.\r | |
1905 | //\r | |
1906 | for (Index = mVariableModuleGlobal->NonVolatileLastVariableOffset; Index < VariableStoreHeader->Size; Index++) {\r | |
052ad7e1 | 1907 | Data = ((UINT8 *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)[Index];\r |
8d3a5c82 | 1908 | if (Data != 0xff) {\r |
1909 | //\r | |
1910 | // There must be something wrong in variable store, do reclaim operation.\r | |
1911 | //\r | |
1912 | Status = Reclaim (\r | |
052ad7e1 | 1913 | mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,\r |
8d3a5c82 | 1914 | &mVariableModuleGlobal->NonVolatileLastVariableOffset,\r |
1915 | FALSE\r | |
1916 | );\r | |
7800593d LG |
1917 | \r |
1918 | if (EFI_ERROR (Status)) {\r | |
1919 | goto Done;\r | |
1920 | }\r | |
1921 | \r | |
8d3a5c82 | 1922 | break;\r |
1923 | }\r | |
1924 | }\r | |
7800593d LG |
1925 | \r |
1926 | //\r | |
1927 | // Register the event handling function to reclaim variable for OS usage.\r | |
1928 | //\r | |
1929 | Status = EfiCreateEventReadyToBootEx (\r | |
1930 | TPL_NOTIFY, \r | |
1931 | ReclaimForOS, \r | |
1932 | NULL, \r | |
1933 | &ReadyToBootEvent\r | |
1934 | );\r | |
8d3a5c82 | 1935 | }\r |
1936 | \r | |
7800593d | 1937 | Done:\r |
8d3a5c82 | 1938 | if (EFI_ERROR (Status)) {\r |
1939 | FreePool (mVariableModuleGlobal);\r | |
1940 | FreePool (VolatileVariableStore);\r | |
1941 | }\r | |
1942 | \r | |
1943 | return Status;\r | |
1944 | }\r | |
052ad7e1 | 1945 | \r |
052ad7e1 A |
1946 | VOID\r |
1947 | EFIAPI\r | |
1948 | VariableClassAddressChangeEvent (\r | |
1949 | IN EFI_EVENT Event,\r | |
1950 | IN VOID *Context\r | |
1951 | )\r | |
1952 | {\r | |
1953 | EfiConvertPointer (\r | |
1954 | 0x0,\r | |
1955 | (VOID **) &mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase\r | |
1956 | );\r | |
1957 | EfiConvertPointer (\r | |
1958 | 0x0,\r | |
1959 | (VOID **) &mVariableModuleGlobal->VariableGlobal.VolatileVariableBase\r | |
1960 | );\r | |
1961 | EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);\r | |
1962 | }\r | |
1963 | \r | |
1964 | \r | |
1965 | /**\r | |
1966 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
1967 | runtime services in the EFI System Table and installs arch protocols \r | |
1968 | for variable read and write services being availible. \r | |
1969 | \r | |
1970 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
1971 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
1972 | \r | |
1973 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
1974 | @retval other Some error occurs when executing this entry point.\r | |
1975 | \r | |
1976 | **/\r | |
1977 | EFI_STATUS\r | |
1978 | EFIAPI\r | |
1979 | VariableServiceInitialize (\r | |
1980 | IN EFI_HANDLE ImageHandle,\r | |
1981 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1982 | )\r | |
1983 | {\r | |
1984 | EFI_STATUS Status;\r | |
1985 | \r | |
1986 | Status = VariableCommonInitialize (ImageHandle, SystemTable);\r | |
1987 | ASSERT_EFI_ERROR (Status);\r | |
1988 | \r | |
1989 | SystemTable->RuntimeServices->GetVariable = RuntimeServiceGetVariable;\r | |
1990 | SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
1991 | SystemTable->RuntimeServices->SetVariable = RuntimeServiceSetVariable;\r | |
1992 | SystemTable->RuntimeServices->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
1993 | \r | |
1994 | //\r | |
1995 | // Now install the Variable Runtime Architectural Protocol on a new handle\r | |
1996 | //\r | |
1997 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1998 | &mHandle,\r | |
1999 | &gEfiVariableArchProtocolGuid, NULL,\r | |
2000 | &gEfiVariableWriteArchProtocolGuid, NULL,\r | |
2001 | NULL\r | |
2002 | );\r | |
2003 | ASSERT_EFI_ERROR (Status);\r | |
2004 | \r | |
2005 | Status = gBS->CreateEvent (\r | |
2006 | EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r | |
2007 | TPL_NOTIFY,\r | |
2008 | VariableClassAddressChangeEvent,\r | |
2009 | NULL,\r | |
2010 | &mVirtualAddressChangeEvent\r | |
2011 | );\r | |
2012 | ASSERT_EFI_ERROR (Status);\r | |
2013 | \r | |
2014 | return EFI_SUCCESS;\r | |
2015 | }\r | |
2016 | \r |