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504214c4 | 1 | /** @file\r |
8d3a5c82 | 2 | \r |
504214c4 LG |
3 | Emulation Variable services operate on the runtime volatile memory.\r |
4 | The nonvolatile variable space doesn't exist.\r | |
5 | \r | |
6 | Copyright (c) 2006 - 2008, Intel Corporation\r | |
8d3a5c82 | 7 | All rights reserved. This program and the accompanying materials\r |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
504214c4 | 15 | **/\r |
8d3a5c82 | 16 | \r |
17 | #include "Variable.h"\r | |
18 | \r | |
1794e506 | 19 | ///\r |
20 | /// Don't use module globals after the SetVirtualAddress map is signaled\r | |
21 | ///\r | |
8d3a5c82 | 22 | ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;\r |
23 | \r | |
e4ddc008 | 24 | VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r |
1794e506 | 25 | \r |
26 | /**\r | |
27 | Acquires lock only at boot time. Simply returns at runtime.\r | |
28 | \r | |
29 | This is a temperary function which will be removed when\r | |
30 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
31 | Runtimer driver in RT phase.\r | |
32 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
33 | at runtime\r | |
34 | \r | |
35 | @param Lock A pointer to the lock to acquire\r | |
36 | \r | |
37 | **/\r | |
8d3a5c82 | 38 | VOID\r |
39 | AcquireLockOnlyAtBootTime (\r | |
40 | IN EFI_LOCK *Lock\r | |
41 | )\r | |
42 | {\r | |
43 | if (!EfiAtRuntime ()) {\r | |
44 | EfiAcquireLock (Lock);\r | |
45 | }\r | |
46 | }\r | |
47 | \r | |
1794e506 | 48 | /**\r |
49 | Releases lock only at boot time. Simply returns at runtime.\r | |
50 | \r | |
51 | This is a temperary function which will be removed when\r | |
52 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
53 | Runtimer driver in RT phase.\r | |
54 | It calls EfiReleaseLock() at boot time, and simply returns\r | |
55 | at runtime\r | |
56 | \r | |
57 | @param Lock A pointer to the lock to release\r | |
58 | \r | |
59 | **/\r | |
8d3a5c82 | 60 | VOID\r |
61 | ReleaseLockOnlyAtBootTime (\r | |
62 | IN EFI_LOCK *Lock\r | |
63 | )\r | |
64 | {\r | |
65 | if (!EfiAtRuntime ()) {\r | |
66 | EfiReleaseLock (Lock);\r | |
67 | }\r | |
68 | }\r | |
69 | \r | |
1794e506 | 70 | /**\r |
71 | Gets pointer to the variable data.\r | |
8d3a5c82 | 72 | \r |
1794e506 | 73 | This function gets the pointer to the variable data according\r |
74 | to the input pointer to the variable header.\r | |
8d3a5c82 | 75 | \r |
1794e506 | 76 | @param Variable Pointer to the variable header.\r |
8d3a5c82 | 77 | \r |
1794e506 | 78 | @return Pointer to variable data\r |
8d3a5c82 | 79 | \r |
1794e506 | 80 | **/\r |
81 | UINT8 *\r | |
82 | GetVariableDataPtr (\r | |
83 | IN VARIABLE_HEADER *Variable\r | |
84 | )\r | |
8d3a5c82 | 85 | {\r |
86 | if (Variable->StartId != VARIABLE_DATA) {\r | |
87 | return NULL;\r | |
88 | }\r | |
89 | //\r | |
90 | // Be careful about pad size for alignment\r | |
91 | //\r | |
92 | return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + Variable->NameSize + GET_PAD_SIZE (Variable->NameSize));\r | |
93 | }\r | |
94 | \r | |
1794e506 | 95 | /**\r |
96 | Gets pointer to header of the next variable.\r | |
8d3a5c82 | 97 | \r |
1794e506 | 98 | This function gets the pointer to the next variable header according\r |
99 | to the input point to the variable header.\r | |
8d3a5c82 | 100 | \r |
1794e506 | 101 | @param Variable Pointer to header of the next variable\r |
8d3a5c82 | 102 | \r |
1794e506 | 103 | @return Pointer to next variable header.\r |
8d3a5c82 | 104 | \r |
1794e506 | 105 | **/\r |
106 | VARIABLE_HEADER *\r | |
107 | GetNextVariablePtr (\r | |
108 | IN VARIABLE_HEADER *Variable\r | |
109 | )\r | |
8d3a5c82 | 110 | {\r |
111 | VARIABLE_HEADER *VarHeader;\r | |
112 | \r | |
113 | if (Variable->StartId != VARIABLE_DATA) {\r | |
114 | return NULL;\r | |
115 | }\r | |
116 | //\r | |
117 | // Be careful about pad size for alignment\r | |
118 | //\r | |
119 | VarHeader = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r | |
120 | \r | |
121 | if (VarHeader->StartId != VARIABLE_DATA ||\r | |
e5618791 | 122 | (sizeof (VARIABLE_HEADER) + VarHeader->DataSize + VarHeader->NameSize) > FixedPcdGet32(PcdMaxVariableSize)\r |
8d3a5c82 | 123 | ) {\r |
124 | return NULL;\r | |
125 | }\r | |
126 | \r | |
127 | return VarHeader;\r | |
128 | }\r | |
129 | \r | |
1794e506 | 130 | /**\r |
131 | Gets pointer to the end of the variable storage area.\r | |
8d3a5c82 | 132 | \r |
1794e506 | 133 | This function gets pointer to the end of the variable storage\r |
134 | area, according to the input variable store header.\r | |
8d3a5c82 | 135 | \r |
1794e506 | 136 | @param VolHeader Pointer to the variale store header\r |
8d3a5c82 | 137 | \r |
1794e506 | 138 | @return Pointer to the end of the variable storage area.\r |
8d3a5c82 | 139 | \r |
1794e506 | 140 | **/\r |
141 | VARIABLE_HEADER *\r | |
142 | GetEndPointer (\r | |
143 | IN VARIABLE_STORE_HEADER *VolHeader\r | |
144 | )\r | |
8d3a5c82 | 145 | {\r |
146 | //\r | |
147 | // The end of variable store\r | |
148 | //\r | |
149 | return (VARIABLE_HEADER *) ((UINTN) VolHeader + VolHeader->Size);\r | |
150 | }\r | |
151 | \r | |
e4ddc008 | 152 | /**\r |
153 | Routine used to track statistical information about variable usage. \r | |
154 | The data is stored in the EFI system table so it can be accessed later.\r | |
155 | VariableInfo.efi can dump out the table. Only Boot Services variable \r | |
156 | accesses are tracked by this code. The PcdVariableCollectStatistics\r | |
157 | build flag controls if this feature is enabled. \r | |
158 | \r | |
159 | A read that hits in the cache will have Read and Cache true for \r | |
160 | the transaction. Data is allocated by this routine, but never\r | |
161 | freed.\r | |
162 | \r | |
163 | @param[in] VariableName Name of the Variable to track\r | |
164 | @param[in] VendorGuid Guid of the Variable to track\r | |
165 | @param[in] Volatile TRUE if volatile FALSE if non-volatile\r | |
166 | @param[in] Read TRUE if GetVariable() was called\r | |
167 | @param[in] Write TRUE if SetVariable() was called\r | |
168 | @param[in] Delete TRUE if deleted via SetVariable()\r | |
169 | @param[in] Cache TRUE for a cache hit.\r | |
170 | \r | |
171 | **/\r | |
172 | VOID\r | |
173 | UpdateVariableInfo (\r | |
174 | IN CHAR16 *VariableName,\r | |
175 | IN EFI_GUID *VendorGuid,\r | |
176 | IN BOOLEAN Volatile,\r | |
177 | IN BOOLEAN Read,\r | |
178 | IN BOOLEAN Write,\r | |
179 | IN BOOLEAN Delete,\r | |
180 | IN BOOLEAN Cache\r | |
181 | )\r | |
182 | {\r | |
183 | VARIABLE_INFO_ENTRY *Entry;\r | |
184 | \r | |
185 | if (FeaturePcdGet (PcdVariableCollectStatistics)) {\r | |
186 | \r | |
187 | if (EfiAtRuntime ()) {\r | |
188 | // Don't collect statistics at runtime\r | |
189 | return;\r | |
190 | }\r | |
191 | \r | |
192 | if (gVariableInfo == NULL) {\r | |
193 | //\r | |
194 | // on the first call allocate a entry and place a pointer to it in\r | |
195 | // the EFI System Table\r | |
196 | //\r | |
197 | gVariableInfo = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r | |
198 | ASSERT (gVariableInfo != NULL);\r | |
199 | \r | |
200 | CopyGuid (&gVariableInfo->VendorGuid, VendorGuid);\r | |
201 | gVariableInfo->Name = AllocatePool (StrLen (VariableName));\r | |
202 | ASSERT (gVariableInfo->Name != NULL);\r | |
203 | StrCpy (gVariableInfo->Name, VariableName);\r | |
204 | gVariableInfo->Volatile = Volatile;\r | |
205 | \r | |
206 | gBS->InstallConfigurationTable (&gEfiVariableGuid, gVariableInfo);\r | |
207 | }\r | |
208 | \r | |
209 | \r | |
210 | for (Entry = gVariableInfo; Entry != NULL; Entry = Entry->Next) {\r | |
211 | if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {\r | |
212 | if (StrCmp (VariableName, Entry->Name) == 0) {\r | |
213 | if (Read) {\r | |
214 | Entry->ReadCount++;\r | |
215 | }\r | |
216 | if (Write) {\r | |
217 | Entry->WriteCount++;\r | |
218 | }\r | |
219 | if (Delete) {\r | |
220 | Entry->DeleteCount++;\r | |
221 | }\r | |
222 | if (Cache) {\r | |
223 | Entry->CacheCount++;\r | |
224 | }\r | |
225 | \r | |
226 | return;\r | |
227 | }\r | |
228 | }\r | |
229 | \r | |
230 | if (Entry->Next == NULL) {\r | |
231 | //\r | |
232 | // If the entry is not in the table add it.\r | |
233 | // Next iteration of the loop will fill in the data\r | |
234 | //\r | |
235 | Entry->Next = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));\r | |
236 | ASSERT (Entry->Next != NULL);\r | |
237 | \r | |
238 | CopyGuid (&Entry->Next->VendorGuid, VendorGuid);\r | |
239 | Entry->Next->Name = AllocatePool (StrLen (VariableName));\r | |
240 | ASSERT (Entry->Next->Name != NULL);\r | |
241 | StrCpy (Entry->Next->Name, VariableName);\r | |
242 | Entry->Next->Volatile = Volatile;\r | |
243 | }\r | |
244 | \r | |
245 | }\r | |
246 | }\r | |
247 | }\r | |
248 | \r | |
1794e506 | 249 | /**\r |
250 | Finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
251 | \r | |
252 | This code finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
253 | If VariableName is an empty string, then we just return the first\r | |
254 | qualified variable without comparing VariableName and VendorGuid.\r | |
255 | Otherwise, VariableName and VendorGuid are compared.\r | |
256 | \r | |
257 | @param VariableName Name of the variable to be found.\r | |
258 | @param VendorGuid Vendor GUID to be found.\r | |
259 | @param PtrTrack VARIABLE_POINTER_TRACK structure for output,\r | |
260 | including the range searched and the target position.\r | |
261 | @param Global Pointer to VARIABLE_GLOBAL structure, including\r | |
262 | base of volatile variable storage area, base of\r | |
263 | NV variable storage area, and a lock.\r | |
264 | \r | |
265 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r | |
266 | VendorGuid is NULL.\r | |
267 | @retval EFI_SUCCESS Variable successfully found.\r | |
268 | @retval EFI_NOT_FOUND Variable not found.\r | |
269 | \r | |
270 | **/\r | |
8d3a5c82 | 271 | EFI_STATUS\r |
8d3a5c82 | 272 | FindVariable (\r |
273 | IN CHAR16 *VariableName,\r | |
274 | IN EFI_GUID *VendorGuid,\r | |
275 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
276 | IN VARIABLE_GLOBAL *Global\r | |
277 | )\r | |
8d3a5c82 | 278 | {\r |
279 | VARIABLE_HEADER *Variable[2];\r | |
280 | VARIABLE_STORE_HEADER *VariableStoreHeader[2];\r | |
281 | UINTN Index;\r | |
282 | \r | |
283 | //\r | |
284 | // We aquire the lock at the entry of FindVariable as GetVariable, GetNextVariableName\r | |
285 | // SetVariable all call FindVariable at entry point. Please move "Aquire Lock" to\r | |
286 | // the correct places if this assumption does not hold TRUE anymore.\r | |
287 | //\r | |
288 | AcquireLockOnlyAtBootTime(&Global->VariableServicesLock);\r | |
289 | \r | |
290 | //\r | |
291 | // 0: Non-Volatile, 1: Volatile\r | |
292 | //\r | |
293 | VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);\r | |
294 | VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);\r | |
295 | \r | |
296 | //\r | |
297 | // Start Pointers for the variable.\r | |
298 | // Actual Data Pointer where data can be written.\r | |
299 | //\r | |
300 | Variable[0] = (VARIABLE_HEADER *) (VariableStoreHeader[0] + 1);\r | |
301 | Variable[1] = (VARIABLE_HEADER *) (VariableStoreHeader[1] + 1);\r | |
302 | \r | |
303 | if (VariableName[0] != 0 && VendorGuid == NULL) {\r | |
304 | return EFI_INVALID_PARAMETER;\r | |
305 | }\r | |
306 | //\r | |
307 | // Find the variable by walk through non-volatile and volatile variable store\r | |
308 | //\r | |
309 | for (Index = 0; Index < 2; Index++) {\r | |
310 | PtrTrack->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader[Index] + 1);\r | |
311 | PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);\r | |
312 | \r | |
313 | while ((Variable[Index] != NULL) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {\r | |
314 | if (Variable[Index]->StartId == VARIABLE_DATA && Variable[Index]->State == VAR_ADDED) {\r | |
2374b973 | 315 | if (!(EfiAtRuntime () && ((Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0))) {\r |
8d3a5c82 | 316 | if (VariableName[0] == 0) {\r |
317 | PtrTrack->CurrPtr = Variable[Index];\r | |
318 | PtrTrack->Volatile = (BOOLEAN) Index;\r | |
319 | return EFI_SUCCESS;\r | |
320 | } else {\r | |
321 | if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {\r | |
c24b392c | 322 | if (CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), Variable[Index]->NameSize) == 0) {\r |
8d3a5c82 | 323 | PtrTrack->CurrPtr = Variable[Index];\r |
324 | PtrTrack->Volatile = (BOOLEAN) Index;\r | |
325 | return EFI_SUCCESS;\r | |
326 | }\r | |
327 | }\r | |
328 | }\r | |
329 | }\r | |
330 | }\r | |
331 | \r | |
332 | Variable[Index] = GetNextVariablePtr (Variable[Index]);\r | |
333 | }\r | |
334 | }\r | |
335 | PtrTrack->CurrPtr = NULL;\r | |
336 | return EFI_NOT_FOUND;\r | |
337 | }\r | |
338 | \r | |
1794e506 | 339 | /**\r |
340 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
341 | \r | |
342 | @param VariableName A Null-terminated Unicode string that is the name of\r | |
343 | the vendor's variable.\r | |
344 | @param VendorGuid A unique identifier for the vendor.\r | |
345 | @param Attributes If not NULL, a pointer to the memory location to return the \r | |
346 | attributes bitmask for the variable.\r | |
347 | @param DataSize Size of Data found. If size is less than the\r | |
348 | data, this value contains the required size.\r | |
349 | @param Data On input, the size in bytes of the return Data buffer. \r | |
350 | On output, the size of data returned in Data.\r | |
351 | @param Global Pointer to VARIABLE_GLOBAL structure\r | |
352 | @param Instance Instance of the Firmware Volume.\r | |
353 | \r | |
354 | @retval EFI_SUCCESS The function completed successfully. \r | |
355 | @retval EFI_NOT_FOUND The variable was not found.\r | |
356 | @retval EFI_BUFFER_TOO_SMALL DataSize is too small for the result. DataSize has \r | |
357 | been updated with the size needed to complete the request.\r | |
358 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid or DataSize is NULL.\r | |
359 | \r | |
360 | **/\r | |
8d3a5c82 | 361 | EFI_STATUS\r |
362 | EFIAPI\r | |
363 | GetVariable (\r | |
364 | IN CHAR16 *VariableName,\r | |
365 | IN EFI_GUID * VendorGuid,\r | |
366 | OUT UINT32 *Attributes OPTIONAL,\r | |
367 | IN OUT UINTN *DataSize,\r | |
368 | OUT VOID *Data,\r | |
369 | IN VARIABLE_GLOBAL * Global,\r | |
370 | IN UINT32 Instance\r | |
371 | )\r | |
8d3a5c82 | 372 | {\r |
373 | VARIABLE_POINTER_TRACK Variable;\r | |
374 | UINTN VarDataSize;\r | |
375 | EFI_STATUS Status;\r | |
376 | \r | |
377 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
378 | return EFI_INVALID_PARAMETER;\r | |
379 | }\r | |
380 | //\r | |
381 | // Find existing variable\r | |
382 | //\r | |
383 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r | |
384 | \r | |
385 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r | |
386 | goto Done;\r | |
387 | }\r | |
388 | //\r | |
389 | // Get data size\r | |
390 | //\r | |
391 | VarDataSize = Variable.CurrPtr->DataSize;\r | |
392 | if (*DataSize >= VarDataSize) {\r | |
393 | if (Data == NULL) {\r | |
394 | Status = EFI_INVALID_PARAMETER;\r | |
395 | goto Done;\r | |
396 | }\r | |
397 | \r | |
398 | CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r | |
399 | if (Attributes != NULL) {\r | |
400 | *Attributes = Variable.CurrPtr->Attributes;\r | |
401 | }\r | |
402 | \r | |
403 | *DataSize = VarDataSize;\r | |
e4ddc008 | 404 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r |
8d3a5c82 | 405 | Status = EFI_SUCCESS;\r |
406 | goto Done;\r | |
407 | } else {\r | |
408 | *DataSize = VarDataSize;\r | |
409 | Status = EFI_BUFFER_TOO_SMALL;\r | |
410 | goto Done;\r | |
411 | }\r | |
412 | \r | |
413 | Done:\r | |
414 | ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);\r | |
415 | return Status;\r | |
416 | }\r | |
417 | \r | |
1794e506 | 418 | /**\r |
419 | \r | |
420 | This code Finds the Next available variable.\r | |
421 | \r | |
422 | @param VariableNameSize Size of the variable.\r | |
423 | @param VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r | |
424 | On output, returns the Null-terminated Unicode string of the current variable.\r | |
425 | @param VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r | |
426 | On output, returns the VendorGuid of the current variable. \r | |
427 | @param Global Pointer to VARIABLE_GLOBAL structure.\r | |
428 | @param Instance Instance of the Firmware Volume.\r | |
429 | \r | |
430 | @retval EFI_SUCCESS The function completed successfully. \r | |
431 | @retval EFI_NOT_FOUND The next variable was not found.\r | |
432 | @retval EFI_BUFFER_TOO_SMALL VariableNameSize is too small for the result. \r | |
433 | VariableNameSize has been updated with the size needed to complete the request.\r | |
434 | @retval EFI_INVALID_PARAMETER VariableNameSize or VariableName or VendorGuid is NULL.\r | |
435 | \r | |
436 | **/\r | |
8d3a5c82 | 437 | EFI_STATUS\r |
438 | EFIAPI\r | |
439 | GetNextVariableName (\r | |
440 | IN OUT UINTN *VariableNameSize,\r | |
441 | IN OUT CHAR16 *VariableName,\r | |
442 | IN OUT EFI_GUID *VendorGuid,\r | |
443 | IN VARIABLE_GLOBAL *Global,\r | |
444 | IN UINT32 Instance\r | |
445 | )\r | |
8d3a5c82 | 446 | {\r |
447 | VARIABLE_POINTER_TRACK Variable;\r | |
448 | UINTN VarNameSize;\r | |
449 | EFI_STATUS Status;\r | |
450 | \r | |
451 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
452 | return EFI_INVALID_PARAMETER;\r | |
453 | }\r | |
454 | \r | |
455 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r | |
456 | \r | |
457 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r | |
458 | goto Done;\r | |
459 | }\r | |
460 | \r | |
461 | while (TRUE) {\r | |
462 | if (VariableName[0] != 0) {\r | |
463 | //\r | |
464 | // If variable name is not NULL, get next variable\r | |
465 | //\r | |
466 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
467 | }\r | |
468 | //\r | |
469 | // If both volatile and non-volatile variable store are parsed,\r | |
470 | // return not found\r | |
471 | //\r | |
472 | if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r | |
473 | Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r | |
474 | if (Variable.Volatile) {\r | |
475 | Variable.StartPtr = (VARIABLE_HEADER *) ((UINTN) (Global->VolatileVariableBase + sizeof (VARIABLE_STORE_HEADER)));\r | |
476 | Variable.EndPtr = (VARIABLE_HEADER *) GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase));\r | |
477 | } else {\r | |
478 | Status = EFI_NOT_FOUND;\r | |
479 | goto Done;\r | |
480 | }\r | |
481 | \r | |
482 | Variable.CurrPtr = Variable.StartPtr;\r | |
483 | if (Variable.CurrPtr->StartId != VARIABLE_DATA) {\r | |
484 | continue;\r | |
485 | }\r | |
486 | }\r | |
487 | //\r | |
488 | // Variable is found\r | |
489 | //\r | |
490 | if (Variable.CurrPtr->StartId == VARIABLE_DATA && Variable.CurrPtr->State == VAR_ADDED) {\r | |
ba5e88f9 | 491 | if (!(EfiAtRuntime () && ((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0))) {\r |
8d3a5c82 | 492 | VarNameSize = Variable.CurrPtr->NameSize;\r |
493 | if (VarNameSize <= *VariableNameSize) {\r | |
494 | CopyMem (\r | |
495 | VariableName,\r | |
496 | GET_VARIABLE_NAME_PTR (Variable.CurrPtr),\r | |
497 | VarNameSize\r | |
498 | );\r | |
499 | CopyMem (\r | |
500 | VendorGuid,\r | |
501 | &Variable.CurrPtr->VendorGuid,\r | |
502 | sizeof (EFI_GUID)\r | |
503 | );\r | |
504 | Status = EFI_SUCCESS;\r | |
505 | } else {\r | |
506 | Status = EFI_BUFFER_TOO_SMALL;\r | |
507 | }\r | |
508 | \r | |
509 | *VariableNameSize = VarNameSize;\r | |
510 | goto Done;\r | |
511 | }\r | |
512 | }\r | |
513 | }\r | |
514 | \r | |
515 | Done:\r | |
516 | ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);\r | |
517 | return Status;\r | |
518 | \r | |
519 | }\r | |
520 | \r | |
1794e506 | 521 | /**\r |
522 | \r | |
523 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
524 | \r | |
525 | @param VariableName A Null-terminated Unicode string that is the name of the vendor's\r | |
526 | variable. Each VariableName is unique for each \r | |
527 | VendorGuid. VariableName must contain 1 or more \r | |
528 | Unicode characters. If VariableName is an empty Unicode \r | |
529 | string, then EFI_INVALID_PARAMETER is returned.\r | |
530 | @param VendorGuid A unique identifier for the vendor\r | |
531 | @param Attributes Attributes bitmask to set for the variable\r | |
532 | @param DataSize The size in bytes of the Data buffer. A size of zero causes the\r | |
533 | variable to be deleted.\r | |
534 | @param Data The contents for the variable\r | |
535 | @param Global Pointer to VARIABLE_GLOBAL structure\r | |
536 | @param VolatileOffset The offset of last volatile variable\r | |
537 | @param NonVolatileOffset The offset of last non-volatile variable\r | |
538 | @param Instance Instance of the Firmware Volume.\r | |
539 | \r | |
540 | @retval EFI_SUCCESS The firmware has successfully stored the variable and its data as \r | |
541 | defined by the Attributes.\r | |
542 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied, or the \r | |
543 | DataSize exceeds the maximum allowed, or VariableName is an empty \r | |
544 | Unicode string, or VendorGuid is NULL.\r | |
545 | @retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.\r | |
546 | @retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.\r | |
547 | @retval EFI_WRITE_PROTECTED The variable in question is read-only or cannot be deleted.\r | |
548 | @retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.\r | |
549 | \r | |
550 | **/\r | |
8d3a5c82 | 551 | EFI_STATUS\r |
552 | EFIAPI\r | |
553 | SetVariable (\r | |
554 | IN CHAR16 *VariableName,\r | |
555 | IN EFI_GUID *VendorGuid,\r | |
556 | IN UINT32 Attributes,\r | |
557 | IN UINTN DataSize,\r | |
558 | IN VOID *Data,\r | |
559 | IN VARIABLE_GLOBAL *Global,\r | |
560 | IN UINTN *VolatileOffset,\r | |
561 | IN UINTN *NonVolatileOffset,\r | |
562 | IN UINT32 Instance\r | |
563 | )\r | |
8d3a5c82 | 564 | {\r |
565 | VARIABLE_POINTER_TRACK Variable;\r | |
566 | EFI_STATUS Status;\r | |
567 | VARIABLE_HEADER *NextVariable;\r | |
568 | UINTN VarNameSize;\r | |
569 | UINTN VarNameOffset;\r | |
570 | UINTN VarDataOffset;\r | |
571 | UINTN VarSize;\r | |
572 | \r | |
c6492839 | 573 | //\r |
574 | // Check input parameters\r | |
575 | //\r | |
8d3a5c82 | 576 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r |
577 | return EFI_INVALID_PARAMETER;\r | |
c6492839 | 578 | } \r |
579 | //\r | |
580 | // Make sure if runtime bit is set, boot service bit is set also\r | |
581 | //\r | |
582 | if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r | |
583 | return EFI_INVALID_PARAMETER;\r | |
8d3a5c82 | 584 | }\r |
c6492839 | 585 | //\r |
586 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
e5618791 LG |
587 | // the DataSize is limited to maximum size of FixedPcdGet32(PcdMaxHardwareErrorVariableSize)\r |
588 | // bytes for HwErrRec, and FixedPcdGet32(PcdMaxVariableSize) bytes for the others.\r | |
c6492839 | 589 | //\r |
590 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
e5618791 LG |
591 | if ((DataSize > FixedPcdGet32(PcdMaxHardwareErrorVariableSize)) || \r |
592 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > FixedPcdGet32(PcdMaxHardwareErrorVariableSize))) {\r | |
c6492839 | 593 | return EFI_INVALID_PARAMETER;\r |
594 | } \r | |
595 | } else {\r | |
596 | //\r | |
597 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
e5618791 | 598 | // the DataSize is limited to maximum size of FixedPcdGet32(PcdMaxVariableSize) bytes.\r |
c6492839 | 599 | //\r |
e5618791 LG |
600 | if ((DataSize > FixedPcdGet32(PcdMaxVariableSize)) ||\r |
601 | (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > FixedPcdGet32(PcdMaxVariableSize))) {\r | |
c6492839 | 602 | return EFI_INVALID_PARAMETER;\r |
603 | } \r | |
604 | } \r | |
605 | //\r | |
606 | // Check whether the input variable is already existed\r | |
607 | //\r | |
608 | \r | |
8d3a5c82 | 609 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r |
610 | \r | |
c6492839 | 611 | if (Status == EFI_SUCCESS && Variable.CurrPtr != NULL) {\r |
8d3a5c82 | 612 | //\r |
c6492839 | 613 | // Update/Delete existing variable\r |
8d3a5c82 | 614 | //\r |
c6492839 | 615 | \r |
616 | if (EfiAtRuntime ()) { \r | |
617 | //\r | |
618 | // If EfiAtRuntime and the variable is Volatile and Runtime Access, \r | |
619 | // the volatile is ReadOnly, and SetVariable should be aborted and \r | |
620 | // return EFI_WRITE_PROTECTED.\r | |
621 | //\r | |
622 | if (Variable.Volatile) {\r | |
623 | Status = EFI_WRITE_PROTECTED;\r | |
624 | goto Done;\r | |
625 | }\r | |
626 | //\r | |
627 | // Only variable have NV attribute can be updated/deleted in Runtime\r | |
628 | //\r | |
c24b392c | 629 | if ((Variable.CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r |
c6492839 | 630 | Status = EFI_INVALID_PARAMETER;\r |
631 | goto Done;\r | |
632 | }\r | |
633 | }\r | |
634 | \r | |
8d3a5c82 | 635 | //\r |
636 | // Setting a data variable with no access, or zero DataSize attributes\r | |
637 | // specified causes it to be deleted.\r | |
638 | //\r | |
c6492839 | 639 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r |
8d3a5c82 | 640 | Variable.CurrPtr->State &= VAR_DELETED;\r |
e4ddc008 | 641 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, FALSE, FALSE, TRUE, FALSE);\r |
8d3a5c82 | 642 | Status = EFI_SUCCESS;\r |
643 | goto Done;\r | |
644 | }\r | |
645 | \r | |
c6492839 | 646 | //\r |
647 | // If the variable is marked valid and the same data has been passed in\r | |
648 | // then return to the caller immediately.\r | |
649 | //\r | |
650 | if (Variable.CurrPtr->DataSize == DataSize &&\r | |
c24b392c | 651 | CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize) == 0\r |
c6492839 | 652 | ) {\r |
653 | Status = EFI_SUCCESS;\r | |
654 | goto Done;\r | |
655 | } else if (Variable.CurrPtr->State == VAR_ADDED) {\r | |
8d3a5c82 | 656 | //\r |
c6492839 | 657 | // Mark the old variable as in delete transition\r |
8d3a5c82 | 658 | //\r |
c6492839 | 659 | Variable.CurrPtr->State &= VAR_IN_DELETED_TRANSITION;\r |
8d3a5c82 | 660 | }\r |
c6492839 | 661 | \r |
662 | } else if (Status == EFI_NOT_FOUND) {\r | |
8d3a5c82 | 663 | //\r |
c6492839 | 664 | // Create a new variable\r |
665 | // \r | |
666 | \r | |
8d3a5c82 | 667 | //\r |
c6492839 | 668 | // Make sure we are trying to create a new variable.\r |
669 | // Setting a data variable with no access, or zero DataSize attributes means to delete it. \r | |
670 | //\r | |
671 | if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {\r | |
672 | Status = EFI_NOT_FOUND;\r | |
673 | goto Done;\r | |
8d3a5c82 | 674 | }\r |
c6492839 | 675 | \r |
8d3a5c82 | 676 | //\r |
c6492839 | 677 | // Only variable have NV|RT attribute can be created in Runtime\r |
8d3a5c82 | 678 | //\r |
c6492839 | 679 | if (EfiAtRuntime () &&\r |
1794e506 | 680 | (((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) || ((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0))) {\r |
c6492839 | 681 | Status = EFI_INVALID_PARAMETER;\r |
682 | goto Done;\r | |
683 | } \r | |
684 | } else {\r | |
8d3a5c82 | 685 | //\r |
c6492839 | 686 | // Status should be EFI_INVALID_PARAMETER here according to return status of FindVariable().\r |
8d3a5c82 | 687 | //\r |
c6492839 | 688 | ASSERT (Status == EFI_INVALID_PARAMETER);\r |
689 | goto Done;\r | |
690 | } \r | |
691 | \r | |
692 | //\r | |
693 | // Function part - create a new variable and copy the data.\r | |
694 | // Both update a variable and create a variable will come here.\r | |
695 | //\r | |
696 | \r | |
697 | VarNameOffset = sizeof (VARIABLE_HEADER);\r | |
698 | VarNameSize = StrSize (VariableName);\r | |
699 | VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
700 | VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);\r | |
701 | \r | |
1794e506 | 702 | if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {\r |
c6492839 | 703 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r |
704 | ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->NonVolatileVariableBase)))->Size\r | |
705 | ) {\r | |
706 | Status = EFI_OUT_OF_RESOURCES;\r | |
707 | goto Done;\r | |
8d3a5c82 | 708 | }\r |
c6492839 | 709 | \r |
710 | NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*NonVolatileOffset + (UINTN) Global->NonVolatileVariableBase);\r | |
711 | *NonVolatileOffset = *NonVolatileOffset + VarSize;\r | |
712 | } else {\r | |
713 | if ((UINT32) (VarSize +*VolatileOffset) >\r | |
714 | ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->VolatileVariableBase)))->Size\r | |
715 | ) {\r | |
716 | Status = EFI_OUT_OF_RESOURCES;\r | |
717 | goto Done;\r | |
718 | }\r | |
719 | \r | |
720 | NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*VolatileOffset + (UINTN) Global->VolatileVariableBase);\r | |
721 | *VolatileOffset = *VolatileOffset + VarSize;\r | |
8d3a5c82 | 722 | }\r |
723 | \r | |
c6492839 | 724 | NextVariable->StartId = VARIABLE_DATA;\r |
725 | NextVariable->Attributes = Attributes;\r | |
726 | NextVariable->State = VAR_ADDED;\r | |
727 | NextVariable->Reserved = 0;\r | |
728 | \r | |
729 | //\r | |
730 | // There will be pad bytes after Data, the NextVariable->NameSize and\r | |
731 | // NextVariable->NameSize should not include pad size so that variable\r | |
732 | // service can get actual size in GetVariable\r | |
733 | //\r | |
734 | NextVariable->NameSize = (UINT32)VarNameSize;\r | |
735 | NextVariable->DataSize = (UINT32)DataSize;\r | |
736 | \r | |
737 | CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r | |
738 | CopyMem (\r | |
739 | (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r | |
740 | VariableName,\r | |
741 | VarNameSize\r | |
742 | );\r | |
743 | CopyMem (\r | |
744 | (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r | |
745 | Data,\r | |
746 | DataSize\r | |
747 | );\r | |
748 | \r | |
749 | //\r | |
750 | // Mark the old variable as deleted\r | |
751 | //\r | |
752 | if (!EFI_ERROR (Status)) {\r | |
753 | Variable.CurrPtr->State &= VAR_DELETED;\r | |
754 | }\r | |
755 | \r | |
e4ddc008 | 756 | UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, FALSE, TRUE, FALSE, FALSE);\r |
757 | \r | |
8d3a5c82 | 758 | Status = EFI_SUCCESS;\r |
759 | Done:\r | |
760 | ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);\r | |
761 | return Status;\r | |
762 | }\r | |
763 | \r | |
1794e506 | 764 | /**\r |
765 | \r | |
766 | This code returns information about the EFI variables.\r | |
767 | \r | |
768 | @param Attributes Attributes bitmask to specify the type of variables\r | |
769 | on which to return information.\r | |
770 | @param MaximumVariableStorageSize On output the maximum size of the storage space available for \r | |
771 | the EFI variables associated with the attributes specified. \r | |
772 | @param RemainingVariableStorageSize Returns the remaining size of the storage space available for EFI \r | |
773 | variables associated with the attributes specified.\r | |
774 | @param MaximumVariableSize Returns the maximum size of an individual EFI variable \r | |
775 | associated with the attributes specified.\r | |
776 | @param Global Pointer to VARIABLE_GLOBAL structure.\r | |
777 | @param Instance Instance of the Firmware Volume.\r | |
778 | \r | |
779 | @retval EFI_SUCCESS Valid answer returned.\r | |
780 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied\r | |
781 | @retval EFI_UNSUPPORTED The attribute is not supported on this platform, and the \r | |
782 | MaximumVariableStorageSize, RemainingVariableStorageSize, \r | |
783 | MaximumVariableSize are undefined.\r | |
784 | \r | |
785 | **/\r | |
8d3a5c82 | 786 | EFI_STATUS\r |
787 | EFIAPI\r | |
788 | QueryVariableInfo (\r | |
789 | IN UINT32 Attributes,\r | |
790 | OUT UINT64 *MaximumVariableStorageSize,\r | |
791 | OUT UINT64 *RemainingVariableStorageSize,\r | |
792 | OUT UINT64 *MaximumVariableSize,\r | |
793 | IN VARIABLE_GLOBAL *Global,\r | |
794 | IN UINT32 Instance\r | |
795 | )\r | |
8d3a5c82 | 796 | {\r |
797 | VARIABLE_HEADER *Variable;\r | |
798 | VARIABLE_HEADER *NextVariable;\r | |
799 | UINT64 VariableSize;\r | |
800 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
801 | \r | |
c6492839 | 802 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
8d3a5c82 | 803 | return EFI_INVALID_PARAMETER;\r |
804 | }\r | |
c6492839 | 805 | \r |
806 | if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {\r | |
8d3a5c82 | 807 | //\r |
808 | // Make sure the Attributes combination is supported by the platform.\r | |
809 | //\r | |
c6492839 | 810 | return EFI_UNSUPPORTED; \r |
8d3a5c82 | 811 | } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r |
812 | //\r | |
813 | // Make sure if runtime bit is set, boot service bit is set also.\r | |
814 | //\r | |
815 | return EFI_INVALID_PARAMETER;\r | |
1794e506 | 816 | } else if (EfiAtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {\r |
8d3a5c82 | 817 | //\r |
818 | // Make sure RT Attribute is set if we are in Runtime phase.\r | |
819 | //\r | |
820 | return EFI_INVALID_PARAMETER;\r | |
8d3a5c82 | 821 | }\r |
822 | \r | |
823 | AcquireLockOnlyAtBootTime(&Global->VariableServicesLock);\r | |
824 | \r | |
825 | if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r | |
826 | //\r | |
827 | // Query is Volatile related.\r | |
828 | //\r | |
829 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);\r | |
830 | } else {\r | |
831 | //\r | |
832 | // Query is Non-Volatile related.\r | |
833 | //\r | |
834 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);\r | |
835 | }\r | |
836 | \r | |
837 | //\r | |
838 | // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize\r | |
839 | // with the storage size (excluding the storage header size)\r | |
840 | //\r | |
841 | *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
842 | *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
843 | \r | |
844 | //\r | |
e5618791 | 845 | // Let *MaximumVariableSize be FixedPcdGet32(PcdMaxVariableSize) with the exception of the variable header size.\r |
8d3a5c82 | 846 | //\r |
e5618791 | 847 | *MaximumVariableSize = FixedPcdGet32(PcdMaxVariableSize) - sizeof (VARIABLE_HEADER);\r |
c6492839 | 848 | \r |
849 | //\r | |
850 | // Harware error record variable needs larger size.\r | |
851 | //\r | |
852 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
e5618791 | 853 | *MaximumVariableSize = FixedPcdGet32(PcdMaxHardwareErrorVariableSize) - sizeof (VARIABLE_HEADER);\r |
c6492839 | 854 | }\r |
8d3a5c82 | 855 | \r |
856 | //\r | |
857 | // Point to the starting address of the variables.\r | |
858 | //\r | |
859 | Variable = (VARIABLE_HEADER *) (VariableStoreHeader + 1);\r | |
860 | \r | |
861 | //\r | |
862 | // Now walk through the related variable store.\r | |
863 | //\r | |
864 | while (Variable < GetEndPointer (VariableStoreHeader)) {\r | |
865 | if (Variable->StartId != VARIABLE_DATA) {\r | |
866 | break;\r | |
867 | }\r | |
868 | \r | |
869 | NextVariable = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r | |
870 | VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r | |
871 | \r | |
872 | if (Variable->State == VAR_ADDED) {\r | |
873 | *RemainingVariableStorageSize -= VariableSize;\r | |
874 | }\r | |
875 | \r | |
876 | //\r | |
877 | // Go to the next one.\r | |
878 | //\r | |
879 | Variable = NextVariable;\r | |
880 | }\r | |
881 | \r | |
c6492839 | 882 | if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {\r |
883 | *MaximumVariableSize = 0;\r | |
884 | } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {\r | |
885 | *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);\r | |
886 | }\r | |
887 | \r | |
8d3a5c82 | 888 | ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);\r |
889 | return EFI_SUCCESS;\r | |
890 | }\r | |
891 | \r | |
1794e506 | 892 | /**\r |
893 | Initializes variable store area.\r | |
894 | \r | |
895 | This function allocates memory space for variable store area and initializes its attributes.\r | |
896 | \r | |
897 | @param VariableBase Base of the variable store area created\r | |
898 | @param LastVariableOffset Size of VARIABLE_STORE_HEADER\r | |
899 | \r | |
900 | **/\r | |
8d3a5c82 | 901 | EFI_STATUS\r |
8d3a5c82 | 902 | InitializeVariableStore (\r |
903 | OUT EFI_PHYSICAL_ADDRESS *VariableBase,\r | |
904 | OUT UINTN *LastVariableOffset\r | |
905 | )\r | |
8d3a5c82 | 906 | {\r |
907 | VARIABLE_STORE_HEADER *VariableStore;\r | |
908 | \r | |
909 | //\r | |
910 | // Allocate memory for volatile variable store\r | |
911 | //\r | |
912 | VariableStore = (VARIABLE_STORE_HEADER *) AllocateRuntimePool (\r | |
e5618791 | 913 | FixedPcdGet32(PcdVariableStoreSize)\r |
8d3a5c82 | 914 | );\r |
915 | if (NULL == VariableStore) {\r | |
916 | return EFI_OUT_OF_RESOURCES;\r | |
917 | }\r | |
918 | \r | |
e5618791 | 919 | SetMem (VariableStore, FixedPcdGet32(PcdVariableStoreSize), 0xff);\r |
8d3a5c82 | 920 | \r |
921 | //\r | |
922 | // Variable Specific Data\r | |
923 | //\r | |
924 | *VariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VariableStore;\r | |
925 | *LastVariableOffset = sizeof (VARIABLE_STORE_HEADER);\r | |
926 | \r | |
3709c4cd | 927 | CopyGuid (&VariableStore->Signature, &gEfiVariableGuid);\r |
e5618791 | 928 | VariableStore->Size = FixedPcdGet32(PcdVariableStoreSize);\r |
8d3a5c82 | 929 | VariableStore->Format = VARIABLE_STORE_FORMATTED;\r |
930 | VariableStore->State = VARIABLE_STORE_HEALTHY;\r | |
931 | VariableStore->Reserved = 0;\r | |
932 | VariableStore->Reserved1 = 0;\r | |
933 | \r | |
934 | return EFI_SUCCESS;\r | |
935 | }\r | |
936 | \r | |
1794e506 | 937 | /**\r |
938 | Initializes variable store area for non-volatile and volatile variable.\r | |
939 | \r | |
940 | This function allocates and initializes memory space for global context of ESAL\r | |
941 | variable service and variable store area for non-volatile and volatile variable.\r | |
942 | \r | |
943 | @param ImageHandle The Image handle of this driver.\r | |
944 | @param SystemTable The pointer of EFI_SYSTEM_TABLE.\r | |
945 | \r | |
946 | @retval EFI_SUCCESS Function successfully executed.\r | |
947 | @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r | |
948 | \r | |
949 | **/\r | |
8d3a5c82 | 950 | EFI_STATUS\r |
951 | EFIAPI\r | |
952 | VariableCommonInitialize (\r | |
953 | IN EFI_HANDLE ImageHandle,\r | |
954 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
955 | )\r | |
8d3a5c82 | 956 | {\r |
957 | EFI_STATUS Status;\r | |
958 | \r | |
959 | //\r | |
960 | // Allocate memory for mVariableModuleGlobal\r | |
961 | //\r | |
962 | mVariableModuleGlobal = (ESAL_VARIABLE_GLOBAL *) AllocateRuntimePool (\r | |
963 | sizeof (ESAL_VARIABLE_GLOBAL)\r | |
964 | );\r | |
965 | if (NULL == mVariableModuleGlobal) {\r | |
966 | return EFI_OUT_OF_RESOURCES;\r | |
967 | }\r | |
968 | \r | |
969 | EfiInitializeLock(&mVariableModuleGlobal->VariableGlobal[Physical].VariableServicesLock, TPL_NOTIFY);\r | |
970 | \r | |
971 | //\r | |
972 | // Intialize volatile variable store\r | |
973 | //\r | |
974 | Status = InitializeVariableStore (\r | |
975 | &mVariableModuleGlobal->VariableGlobal[Physical].VolatileVariableBase,\r | |
976 | &mVariableModuleGlobal->VolatileLastVariableOffset\r | |
977 | );\r | |
978 | \r | |
979 | if (EFI_ERROR (Status)) {\r | |
5bb820af | 980 | FreePool(mVariableModuleGlobal);\r |
8d3a5c82 | 981 | return Status;\r |
982 | }\r | |
983 | //\r | |
984 | // Intialize non volatile variable store\r | |
985 | //\r | |
986 | Status = InitializeVariableStore (\r | |
987 | &mVariableModuleGlobal->VariableGlobal[Physical].NonVolatileVariableBase,\r | |
988 | &mVariableModuleGlobal->NonVolatileLastVariableOffset\r | |
989 | );\r | |
990 | \r | |
991 | return Status;\r | |
992 | }\r |