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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | EmuVariable.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Revision History\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | #include "Variable.h"\r | |
23 | \r | |
24 | //\r | |
25 | // Don't use module globals after the SetVirtualAddress map is signaled\r | |
26 | //\r | |
27 | ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;\r | |
28 | \r | |
29 | UINT32\r | |
30 | EFIAPI\r | |
31 | ArrayLength (\r | |
32 | IN CHAR16 *String\r | |
33 | )\r | |
34 | /*++\r | |
35 | \r | |
36 | Routine Description:\r | |
37 | \r | |
38 | Determine the length of null terminated char16 array.\r | |
39 | \r | |
40 | Arguments:\r | |
41 | \r | |
42 | String Null-terminated CHAR16 array pointer.\r | |
43 | \r | |
44 | Returns:\r | |
45 | \r | |
46 | UINT32 Number of bytes in the string, including the double NULL at the end;\r | |
47 | \r | |
48 | --*/\r | |
49 | {\r | |
50 | UINT32 Count;\r | |
51 | \r | |
52 | if (NULL == String) {\r | |
53 | return 0;\r | |
54 | }\r | |
55 | \r | |
56 | Count = 0;\r | |
57 | \r | |
58 | while (0 != String[Count]) {\r | |
59 | Count++;\r | |
60 | }\r | |
61 | \r | |
62 | return (Count * 2) + 2;\r | |
63 | }\r | |
64 | \r | |
65 | UINTN\r | |
66 | EFIAPI\r | |
67 | GetPadSize (\r | |
68 | IN UINTN Value\r | |
69 | )\r | |
70 | /*++\r | |
71 | \r | |
72 | Routine Description:\r | |
73 | \r | |
74 | This function return the pad size for alignment\r | |
75 | \r | |
76 | Arguments:\r | |
77 | \r | |
78 | Value The value need to align\r | |
79 | \r | |
80 | Returns:\r | |
81 | \r | |
82 | Pad size for value\r | |
83 | \r | |
84 | --*/\r | |
85 | {\r | |
86 | //\r | |
87 | // If alignment is 0 or 1, means no alignment required\r | |
88 | //\r | |
89 | if (ALIGNMENT == 0 || ALIGNMENT == 1) {\r | |
90 | return 0;\r | |
91 | }\r | |
92 | \r | |
93 | return ALIGNMENT - (Value % ALIGNMENT);\r | |
94 | }\r | |
95 | \r | |
96 | VARIABLE_STORE_STATUS\r | |
97 | EFIAPI\r | |
98 | GetVariableStoreStatus (\r | |
99 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
100 | )\r | |
101 | /*++\r | |
102 | \r | |
103 | Routine Description:\r | |
104 | \r | |
105 | This code gets the pointer to the variable name.\r | |
106 | \r | |
107 | Arguments:\r | |
108 | \r | |
109 | VarStoreHeader Pointer to the Variable Store Header.\r | |
110 | \r | |
111 | Returns:\r | |
112 | \r | |
113 | EfiHealthy Variable store is healthy\r | |
114 | EfiRaw Variable store is raw\r | |
115 | EfiInvalid Variable store is invalid\r | |
116 | \r | |
117 | --*/\r | |
118 | {\r | |
119 | if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&\r | |
120 | VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&\r | |
121 | VarStoreHeader->State == VARIABLE_STORE_HEALTHY\r | |
122 | ) {\r | |
123 | \r | |
124 | return EfiValid;\r | |
125 | } else if (VarStoreHeader->Signature == 0xffffffff &&\r | |
126 | VarStoreHeader->Size == 0xffffffff &&\r | |
127 | VarStoreHeader->Format == 0xff &&\r | |
128 | VarStoreHeader->State == 0xff\r | |
129 | ) {\r | |
130 | \r | |
131 | return EfiRaw;\r | |
132 | } else {\r | |
133 | return EfiInvalid;\r | |
134 | }\r | |
135 | }\r | |
136 | \r | |
137 | UINT8 *\r | |
138 | EFIAPI\r | |
139 | GetVariableDataPtr (\r | |
140 | IN VARIABLE_HEADER *Variable\r | |
141 | )\r | |
142 | /*++\r | |
143 | \r | |
144 | Routine Description:\r | |
145 | \r | |
146 | This code gets the pointer to the variable data.\r | |
147 | \r | |
148 | Arguments:\r | |
149 | \r | |
150 | Variable Pointer to the Variable Header.\r | |
151 | \r | |
152 | Returns:\r | |
153 | \r | |
154 | UINT8* Pointer to Variable Data\r | |
155 | \r | |
156 | --*/\r | |
157 | {\r | |
158 | if (Variable->StartId != VARIABLE_DATA) {\r | |
159 | return NULL;\r | |
160 | }\r | |
161 | //\r | |
162 | // Be careful about pad size for alignment\r | |
163 | //\r | |
164 | return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + Variable->NameSize + GetPadSize (Variable->NameSize));\r | |
165 | }\r | |
166 | \r | |
167 | VARIABLE_HEADER *\r | |
168 | EFIAPI\r | |
169 | GetNextVariablePtr (\r | |
170 | IN VARIABLE_HEADER *Variable\r | |
171 | )\r | |
172 | /*++\r | |
173 | \r | |
174 | Routine Description:\r | |
175 | \r | |
176 | This code gets the pointer to the next variable header.\r | |
177 | \r | |
178 | Arguments:\r | |
179 | \r | |
180 | Variable Pointer to the Variable Header.\r | |
181 | \r | |
182 | Returns:\r | |
183 | \r | |
184 | VARIABLE_HEADER* Pointer to next variable header.\r | |
185 | \r | |
186 | --*/\r | |
187 | {\r | |
188 | VARIABLE_HEADER *VarHeader;\r | |
189 | \r | |
190 | if (Variable->StartId != VARIABLE_DATA) {\r | |
191 | return NULL;\r | |
192 | }\r | |
193 | //\r | |
194 | // Be careful about pad size for alignment\r | |
195 | //\r | |
196 | VarHeader = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r | |
197 | \r | |
198 | if (VarHeader->StartId != VARIABLE_DATA ||\r | |
199 | (sizeof (VARIABLE_HEADER) + VarHeader->DataSize + VarHeader->NameSize) > MAX_VARIABLE_SIZE\r | |
200 | ) {\r | |
201 | return NULL;\r | |
202 | }\r | |
203 | \r | |
204 | return VarHeader;\r | |
205 | }\r | |
206 | \r | |
207 | VARIABLE_HEADER *\r | |
208 | EFIAPI\r | |
209 | GetEndPointer (\r | |
210 | IN VARIABLE_STORE_HEADER *VolHeader\r | |
211 | )\r | |
212 | /*++\r | |
213 | \r | |
214 | Routine Description:\r | |
215 | \r | |
216 | This code gets the pointer to the last variable memory pointer byte\r | |
217 | \r | |
218 | Arguments:\r | |
219 | \r | |
220 | Variable Pointer to the Variable Header.\r | |
221 | \r | |
222 | Returns:\r | |
223 | \r | |
224 | VARIABLE_HEADER* Pointer to last unavailable Variable Header\r | |
225 | \r | |
226 | --*/\r | |
227 | {\r | |
228 | //\r | |
229 | // The end of variable store\r | |
230 | //\r | |
231 | return (VARIABLE_HEADER *) ((UINTN) VolHeader + VolHeader->Size);\r | |
232 | }\r | |
233 | \r | |
234 | EFI_STATUS\r | |
235 | EFIAPI\r | |
236 | FindVariable (\r | |
237 | IN CHAR16 *VariableName,\r | |
238 | IN EFI_GUID *VendorGuid,\r | |
239 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
240 | IN VARIABLE_GLOBAL *Global\r | |
241 | )\r | |
242 | /*++\r | |
243 | \r | |
244 | Routine Description:\r | |
245 | \r | |
246 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
247 | \r | |
248 | Arguments:\r | |
249 | \r | |
250 | VariableName Name of the variable to be found\r | |
251 | VendorGuid Vendor GUID to be found.\r | |
252 | PtrTrack Variable Track Pointer structure that contains\r | |
253 | Variable Information.\r | |
254 | Contains the pointer of Variable header.\r | |
255 | Global VARIABLE_GLOBAL pointer\r | |
256 | \r | |
257 | Returns:\r | |
258 | \r | |
259 | EFI STATUS\r | |
260 | \r | |
261 | --*/\r | |
262 | {\r | |
263 | VARIABLE_HEADER *Variable[2];\r | |
264 | VARIABLE_STORE_HEADER *VariableStoreHeader[2];\r | |
265 | UINTN Index;\r | |
266 | \r | |
267 | //\r | |
268 | // 0: Non-Volatile, 1: Volatile\r | |
269 | //\r | |
270 | VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);\r | |
271 | VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);\r | |
272 | \r | |
273 | //\r | |
274 | // Start Pointers for the variable.\r | |
275 | // Actual Data Pointer where data can be written.\r | |
276 | //\r | |
277 | Variable[0] = (VARIABLE_HEADER *) (VariableStoreHeader[0] + 1);\r | |
278 | Variable[1] = (VARIABLE_HEADER *) (VariableStoreHeader[1] + 1);\r | |
279 | \r | |
280 | if (VariableName[0] != 0 && VendorGuid == NULL) {\r | |
281 | return EFI_INVALID_PARAMETER;\r | |
282 | }\r | |
283 | //\r | |
284 | // Find the variable by walk through non-volatile and volatile variable store\r | |
285 | //\r | |
286 | for (Index = 0; Index < 2; Index++) {\r | |
287 | PtrTrack->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader[Index] + 1);\r | |
288 | PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);\r | |
289 | \r | |
290 | while ((Variable[Index] != NULL) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {\r | |
291 | if (Variable[Index]->StartId == VARIABLE_DATA && Variable[Index]->State == VAR_ADDED) {\r | |
292 | if (!(EfiAtRuntime () && !(Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {\r | |
293 | if (VariableName[0] == 0) {\r | |
294 | PtrTrack->CurrPtr = Variable[Index];\r | |
295 | PtrTrack->Volatile = (BOOLEAN) Index;\r | |
296 | return EFI_SUCCESS;\r | |
297 | } else {\r | |
298 | if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {\r | |
299 | if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), ArrayLength (VariableName))) {\r | |
300 | PtrTrack->CurrPtr = Variable[Index];\r | |
301 | PtrTrack->Volatile = (BOOLEAN) Index;\r | |
302 | return EFI_SUCCESS;\r | |
303 | }\r | |
304 | }\r | |
305 | }\r | |
306 | }\r | |
307 | }\r | |
308 | \r | |
309 | Variable[Index] = GetNextVariablePtr (Variable[Index]);\r | |
310 | }\r | |
311 | }\r | |
312 | PtrTrack->CurrPtr = NULL;\r | |
313 | return EFI_NOT_FOUND;\r | |
314 | }\r | |
315 | \r | |
316 | EFI_STATUS\r | |
317 | EFIAPI\r | |
318 | GetVariable (\r | |
319 | IN CHAR16 *VariableName,\r | |
320 | IN EFI_GUID * VendorGuid,\r | |
321 | OUT UINT32 *Attributes OPTIONAL,\r | |
322 | IN OUT UINTN *DataSize,\r | |
323 | OUT VOID *Data,\r | |
324 | IN VARIABLE_GLOBAL * Global,\r | |
325 | IN UINT32 Instance\r | |
326 | )\r | |
327 | /*++\r | |
328 | \r | |
329 | Routine Description:\r | |
330 | \r | |
331 | This code finds variable in storage blocks (Volatile or Non-Volatile)\r | |
332 | \r | |
333 | Arguments:\r | |
334 | \r | |
335 | VariableName Name of Variable to be found\r | |
336 | VendorGuid Variable vendor GUID\r | |
337 | Attributes OPTIONAL Attribute value of the variable found\r | |
338 | DataSize Size of Data found. If size is less than the\r | |
339 | data, this value contains the required size.\r | |
340 | Data Data pointer\r | |
341 | Global Pointer to VARIABLE_GLOBAL structure\r | |
342 | Instance Instance of the Firmware Volume.\r | |
343 | \r | |
344 | Returns:\r | |
345 | \r | |
346 | EFI STATUS\r | |
347 | \r | |
348 | --*/\r | |
349 | {\r | |
350 | VARIABLE_POINTER_TRACK Variable;\r | |
351 | UINTN VarDataSize;\r | |
352 | EFI_STATUS Status;\r | |
353 | \r | |
354 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
355 | return EFI_INVALID_PARAMETER;\r | |
356 | }\r | |
357 | //\r | |
358 | // Find existing variable\r | |
359 | //\r | |
360 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r | |
361 | \r | |
362 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r | |
363 | return Status;\r | |
364 | }\r | |
365 | //\r | |
366 | // Get data size\r | |
367 | //\r | |
368 | VarDataSize = Variable.CurrPtr->DataSize;\r | |
369 | if (*DataSize >= VarDataSize) {\r | |
370 | CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r | |
371 | if (Attributes) {\r | |
372 | *Attributes = Variable.CurrPtr->Attributes;\r | |
373 | }\r | |
374 | \r | |
375 | *DataSize = VarDataSize;\r | |
376 | return EFI_SUCCESS;\r | |
377 | } else {\r | |
378 | *DataSize = VarDataSize;\r | |
379 | return EFI_BUFFER_TOO_SMALL;\r | |
380 | }\r | |
381 | }\r | |
382 | \r | |
383 | EFI_STATUS\r | |
384 | EFIAPI\r | |
385 | GetNextVariableName (\r | |
386 | IN OUT UINTN *VariableNameSize,\r | |
387 | IN OUT CHAR16 *VariableName,\r | |
388 | IN OUT EFI_GUID *VendorGuid,\r | |
389 | IN VARIABLE_GLOBAL *Global,\r | |
390 | IN UINT32 Instance\r | |
391 | )\r | |
392 | /*++\r | |
393 | \r | |
394 | Routine Description:\r | |
395 | \r | |
396 | This code Finds the Next available variable\r | |
397 | \r | |
398 | Arguments:\r | |
399 | \r | |
400 | VariableNameSize Size of the variable\r | |
401 | VariableName Pointer to variable name\r | |
402 | VendorGuid Variable Vendor Guid\r | |
403 | Global VARIABLE_GLOBAL structure pointer.\r | |
404 | Instance FV instance\r | |
405 | \r | |
406 | Returns:\r | |
407 | \r | |
408 | EFI STATUS\r | |
409 | \r | |
410 | --*/\r | |
411 | {\r | |
412 | VARIABLE_POINTER_TRACK Variable;\r | |
413 | UINTN VarNameSize;\r | |
414 | EFI_STATUS Status;\r | |
415 | \r | |
416 | if (VariableNameSize == NULL || VendorGuid == NULL) {\r | |
417 | return EFI_INVALID_PARAMETER;\r | |
418 | }\r | |
419 | \r | |
420 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r | |
421 | \r | |
422 | if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r | |
423 | return Status;\r | |
424 | }\r | |
425 | \r | |
426 | while (TRUE) {\r | |
427 | if (VariableName[0] != 0) {\r | |
428 | //\r | |
429 | // If variable name is not NULL, get next variable\r | |
430 | //\r | |
431 | Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r | |
432 | }\r | |
433 | //\r | |
434 | // If both volatile and non-volatile variable store are parsed,\r | |
435 | // return not found\r | |
436 | //\r | |
437 | if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r | |
438 | Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r | |
439 | if (Variable.Volatile) {\r | |
440 | Variable.StartPtr = (VARIABLE_HEADER *) ((UINTN) (Global->VolatileVariableBase + sizeof (VARIABLE_STORE_HEADER)));\r | |
441 | Variable.EndPtr = (VARIABLE_HEADER *) GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase));\r | |
442 | } else {\r | |
443 | return EFI_NOT_FOUND;\r | |
444 | }\r | |
445 | \r | |
446 | Variable.CurrPtr = Variable.StartPtr;\r | |
447 | if (Variable.CurrPtr->StartId != VARIABLE_DATA) {\r | |
448 | continue;\r | |
449 | }\r | |
450 | }\r | |
451 | //\r | |
452 | // Variable is found\r | |
453 | //\r | |
454 | if (Variable.CurrPtr->StartId == VARIABLE_DATA && Variable.CurrPtr->State == VAR_ADDED) {\r | |
455 | if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {\r | |
456 | VarNameSize = Variable.CurrPtr->NameSize;\r | |
457 | if (VarNameSize <= *VariableNameSize) {\r | |
458 | CopyMem (\r | |
459 | VariableName,\r | |
460 | GET_VARIABLE_NAME_PTR (Variable.CurrPtr),\r | |
461 | VarNameSize\r | |
462 | );\r | |
463 | CopyMem (\r | |
464 | VendorGuid,\r | |
465 | &Variable.CurrPtr->VendorGuid,\r | |
466 | sizeof (EFI_GUID)\r | |
467 | );\r | |
468 | Status = EFI_SUCCESS;\r | |
469 | } else {\r | |
470 | Status = EFI_BUFFER_TOO_SMALL;\r | |
471 | }\r | |
472 | \r | |
473 | *VariableNameSize = VarNameSize;\r | |
474 | return Status;\r | |
475 | }\r | |
476 | }\r | |
477 | }\r | |
478 | \r | |
479 | return EFI_NOT_FOUND;\r | |
480 | }\r | |
481 | \r | |
482 | EFI_STATUS\r | |
483 | EFIAPI\r | |
484 | SetVariable (\r | |
485 | IN CHAR16 *VariableName,\r | |
486 | IN EFI_GUID *VendorGuid,\r | |
487 | IN UINT32 Attributes,\r | |
488 | IN UINTN DataSize,\r | |
489 | IN VOID *Data,\r | |
490 | IN VARIABLE_GLOBAL *Global,\r | |
491 | IN UINTN *VolatileOffset,\r | |
492 | IN UINTN *NonVolatileOffset,\r | |
493 | IN UINT32 Instance\r | |
494 | )\r | |
495 | /*++\r | |
496 | \r | |
497 | Routine Description:\r | |
498 | \r | |
499 | This code sets variable in storage blocks (Volatile or Non-Volatile)\r | |
500 | \r | |
501 | Arguments:\r | |
502 | \r | |
503 | VariableName Name of Variable to be found\r | |
504 | VendorGuid Variable vendor GUID\r | |
505 | Attributes Attribute value of the variable found\r | |
506 | DataSize Size of Data found. If size is less than the\r | |
507 | data, this value contains the required size.\r | |
508 | Data Data pointer\r | |
509 | Global Pointer to VARIABLE_GLOBAL structure\r | |
510 | VolatileOffset The offset of last volatile variable\r | |
511 | NonVolatileOffset The offset of last non-volatile variable\r | |
512 | Instance Instance of the Firmware Volume.\r | |
513 | \r | |
514 | Returns:\r | |
515 | \r | |
516 | EFI STATUS\r | |
517 | \r | |
518 | --*/\r | |
519 | {\r | |
520 | VARIABLE_POINTER_TRACK Variable;\r | |
521 | EFI_STATUS Status;\r | |
522 | VARIABLE_HEADER *NextVariable;\r | |
523 | UINTN VarNameSize;\r | |
524 | UINTN VarNameOffset;\r | |
525 | UINTN VarDataOffset;\r | |
526 | UINTN VarSize;\r | |
527 | \r | |
528 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
529 | return EFI_INVALID_PARAMETER;\r | |
530 | }\r | |
531 | \r | |
532 | Status = FindVariable (VariableName, VendorGuid, &Variable, Global);\r | |
533 | \r | |
534 | if (Status == EFI_INVALID_PARAMETER) {\r | |
535 | return Status;\r | |
536 | }\r | |
537 | //\r | |
538 | // The size of the VariableName, including the Unicode Null in bytes plus\r | |
539 | // the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.\r | |
540 | //\r | |
541 | else if (sizeof (VARIABLE_HEADER) + (ArrayLength (VariableName) + DataSize) > MAX_VARIABLE_SIZE) {\r | |
542 | return EFI_INVALID_PARAMETER;\r | |
543 | }\r | |
544 | //\r | |
545 | // Make sure if runtime bit is set, boot service bit is set also\r | |
546 | //\r | |
547 | else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS\r | |
548 | ) {\r | |
549 | return EFI_INVALID_PARAMETER;\r | |
550 | }\r | |
551 | //\r | |
552 | // Runtime but Attribute is not Runtime\r | |
553 | //\r | |
554 | else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r | |
555 | return EFI_INVALID_PARAMETER;\r | |
556 | }\r | |
557 | //\r | |
558 | // Cannot set volatile variable in Runtime\r | |
559 | //\r | |
560 | else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_NON_VOLATILE)) {\r | |
561 | return EFI_INVALID_PARAMETER;\r | |
562 | }\r | |
563 | //\r | |
564 | // Setting a data variable with no access, or zero DataSize attributes\r | |
565 | // specified causes it to be deleted.\r | |
566 | //\r | |
567 | else if (DataSize == 0 || Attributes == 0) {\r | |
568 | if (!EFI_ERROR (Status)) {\r | |
569 | Variable.CurrPtr->State &= VAR_DELETED;\r | |
570 | return EFI_SUCCESS;\r | |
571 | }\r | |
572 | \r | |
573 | return EFI_NOT_FOUND;\r | |
574 | } else {\r | |
575 | if (!EFI_ERROR (Status)) {\r | |
576 | //\r | |
577 | // If the variable is marked valid and the same data has been passed in\r | |
578 | // then return to the caller immediately.\r | |
579 | //\r | |
580 | if (Variable.CurrPtr->DataSize == DataSize &&\r | |
581 | !CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize)\r | |
582 | ) {\r | |
583 | return EFI_SUCCESS;\r | |
584 | } else if (Variable.CurrPtr->State == VAR_ADDED) {\r | |
585 | //\r | |
586 | // Mark the old variable as in delete transition\r | |
587 | //\r | |
588 | Variable.CurrPtr->State &= VAR_IN_DELETED_TRANSITION;\r | |
589 | }\r | |
590 | }\r | |
591 | //\r | |
592 | // Create a new variable and copy the data.\r | |
593 | //\r | |
594 | VarNameOffset = sizeof (VARIABLE_HEADER);\r | |
595 | VarNameSize = ArrayLength (VariableName);\r | |
596 | VarDataOffset = VarNameOffset + VarNameSize + GetPadSize (VarNameSize);\r | |
597 | VarSize = VarDataOffset + DataSize + GetPadSize (DataSize);\r | |
598 | \r | |
599 | if (Attributes & EFI_VARIABLE_NON_VOLATILE) {\r | |
600 | if ((UINT32) (VarSize +*NonVolatileOffset) >\r | |
601 | ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->NonVolatileVariableBase)))->Size\r | |
602 | ) {\r | |
603 | return EFI_OUT_OF_RESOURCES;\r | |
604 | }\r | |
605 | \r | |
606 | NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*NonVolatileOffset + (UINTN) Global->NonVolatileVariableBase);\r | |
607 | *NonVolatileOffset = *NonVolatileOffset + VarSize;\r | |
608 | } else {\r | |
609 | if (EfiAtRuntime ()) {\r | |
610 | return EFI_INVALID_PARAMETER;\r | |
611 | }\r | |
612 | \r | |
613 | if ((UINT32) (VarSize +*VolatileOffset) >\r | |
614 | ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->VolatileVariableBase)))->Size\r | |
615 | ) {\r | |
616 | return EFI_OUT_OF_RESOURCES;\r | |
617 | }\r | |
618 | \r | |
619 | NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*VolatileOffset + (UINTN) Global->VolatileVariableBase);\r | |
620 | *VolatileOffset = *VolatileOffset + VarSize;\r | |
621 | }\r | |
622 | \r | |
623 | NextVariable->StartId = VARIABLE_DATA;\r | |
624 | NextVariable->Attributes = Attributes;\r | |
625 | NextVariable->State = VAR_ADDED;\r | |
626 | NextVariable->Reserved = 0;\r | |
627 | \r | |
628 | //\r | |
629 | // There will be pad bytes after Data, the NextVariable->NameSize and\r | |
630 | // NextVariable->NameSize should not include pad size so that variable\r | |
631 | // service can get actual size in GetVariable\r | |
632 | //\r | |
633 | NextVariable->NameSize = (UINT32)VarNameSize;\r | |
634 | NextVariable->DataSize = (UINT32)DataSize;\r | |
635 | \r | |
636 | CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));\r | |
637 | CopyMem (\r | |
638 | (UINT8 *) ((UINTN) NextVariable + VarNameOffset),\r | |
639 | VariableName,\r | |
640 | VarNameSize\r | |
641 | );\r | |
642 | CopyMem (\r | |
643 | (UINT8 *) ((UINTN) NextVariable + VarDataOffset),\r | |
644 | Data,\r | |
645 | DataSize\r | |
646 | );\r | |
647 | \r | |
648 | //\r | |
649 | // Mark the old variable as deleted\r | |
650 | //\r | |
651 | if (!EFI_ERROR (Status)) {\r | |
652 | Variable.CurrPtr->State &= VAR_DELETED;\r | |
653 | }\r | |
654 | }\r | |
655 | \r | |
656 | return EFI_SUCCESS;\r | |
657 | }\r | |
658 | \r | |
045f4521 | 659 | #if (EFI_SPECIFICATION_VERSION >= 0x00020000)\r |
660 | EFI_STATUS\r | |
661 | EFIAPI\r | |
662 | QueryVariableInfo (\r | |
663 | IN UINT32 Attributes,\r | |
664 | OUT UINT64 *MaximumVariableStorageSize,\r | |
665 | OUT UINT64 *RemainingVariableStorageSize,\r | |
666 | OUT UINT64 *MaximumVariableSize,\r | |
667 | IN VARIABLE_GLOBAL *Global,\r | |
668 | IN UINT32 Instance\r | |
669 | )\r | |
670 | /*++\r | |
671 | \r | |
672 | Routine Description:\r | |
673 | \r | |
674 | This code returns information about the EFI variables.\r | |
675 | \r | |
676 | Arguments:\r | |
677 | \r | |
678 | Attributes Attributes bitmask to specify the type of variables \r | |
679 | on which to return information.\r | |
680 | MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
681 | for the EFI variables associated with the attributes specified.\r | |
682 | RemainingVariableStorageSize Pointer to the remaining size of the storage space available \r | |
683 | for the EFI variables associated with the attributes specified.\r | |
684 | MaximumVariableSize Pointer to the maximum size of the individual EFI variables\r | |
685 | associated with the attributes specified.\r | |
686 | Global Pointer to VARIABLE_GLOBAL structure.\r | |
687 | Instance Instance of the Firmware Volume.\r | |
688 | \r | |
689 | Returns:\r | |
690 | \r | |
691 | EFI STATUS\r | |
692 | EFI_INVALID_PARAMETER - An invalid combination of attribute bits was supplied.\r | |
693 | EFI_SUCCESS - Query successfully.\r | |
694 | EFI_UNSUPPORTED - The attribute is not supported on this platform.\r | |
695 | \r | |
696 | --*/\r | |
697 | {\r | |
698 | VARIABLE_HEADER *Variable;\r | |
699 | VARIABLE_HEADER *NextVariable;\r | |
700 | UINT64 VariableSize;\r | |
701 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
702 | \r | |
703 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL) {\r | |
704 | return EFI_INVALID_PARAMETER;\r | |
705 | }\r | |
706 | \r | |
707 | if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS)) == 0) {\r | |
708 | //\r | |
709 | // Make sure the Attributes combination is supported by the platform.\r | |
710 | //\r | |
711 | return EFI_UNSUPPORTED;\r | |
712 | } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r | |
713 | //\r | |
714 | // Make sure if runtime bit is set, boot service bit is set also.\r | |
715 | //\r | |
716 | return EFI_INVALID_PARAMETER;\r | |
717 | } else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r | |
718 | //\r | |
719 | // Make sure RT Attribute is set if we are in Runtime phase.\r | |
720 | //\r | |
721 | return EFI_INVALID_PARAMETER;\r | |
722 | }\r | |
723 | \r | |
724 | if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r | |
725 | //\r | |
726 | // Query is Volatile related.\r | |
727 | //\r | |
728 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase); \r | |
729 | } else {\r | |
730 | //\r | |
731 | // Query is Non-Volatile related.\r | |
732 | //\r | |
733 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);\r | |
734 | }\r | |
735 | \r | |
736 | //\r | |
737 | // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize \r | |
738 | // with the storage size (excluding the storage header size)\r | |
739 | //\r | |
740 | *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
741 | *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r | |
742 | \r | |
743 | //\r | |
744 | // Let *MaximumVariableSize be MAX_VARIABLE_SIZE \r | |
745 | //\r | |
746 | *MaximumVariableSize = MAX_VARIABLE_SIZE;\r | |
747 | \r | |
748 | //\r | |
749 | // Point to the starting address of the variables.\r | |
750 | //\r | |
751 | Variable = (VARIABLE_HEADER *) (VariableStoreHeader + 1);\r | |
752 | \r | |
753 | //\r | |
754 | // Now walk through the related variable store.\r | |
755 | //\r | |
756 | while (Variable < GetEndPointer (VariableStoreHeader)) {\r | |
757 | if (Variable->StartId != VARIABLE_DATA) {\r | |
758 | break;\r | |
759 | }\r | |
760 | \r | |
761 | NextVariable = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r | |
762 | VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r | |
763 | \r | |
764 | if (Variable->State == VAR_ADDED) {\r | |
765 | *RemainingVariableStorageSize -= VariableSize;\r | |
766 | }\r | |
767 | \r | |
768 | //\r | |
769 | // Go to the next one.\r | |
770 | //\r | |
771 | Variable = NextVariable;\r | |
772 | }\r | |
773 | \r | |
774 | return EFI_SUCCESS;\r | |
775 | }\r | |
776 | #endif\r | |
777 | \r | |
878ddf1f | 778 | EFI_STATUS\r |
779 | EFIAPI\r | |
780 | InitializeVariableStore (\r | |
781 | OUT EFI_PHYSICAL_ADDRESS *VariableBase,\r | |
782 | OUT UINTN *LastVariableOffset\r | |
783 | )\r | |
784 | /*++\r | |
785 | \r | |
786 | Routine Description:\r | |
787 | This function initializes variable store\r | |
788 | \r | |
789 | Arguments:\r | |
790 | \r | |
791 | Returns:\r | |
792 | \r | |
793 | --*/\r | |
794 | {\r | |
795 | VARIABLE_STORE_HEADER *VariableStore;\r | |
796 | \r | |
797 | //\r | |
798 | // Allocate memory for volatile variable store\r | |
799 | //\r | |
800 | VariableStore = (VARIABLE_STORE_HEADER *) AllocateRuntimePool (\r | |
801 | VARIABLE_STORE_SIZE\r | |
802 | );\r | |
803 | if (NULL == VariableStore) {\r | |
804 | return EFI_OUT_OF_RESOURCES;\r | |
805 | }\r | |
806 | \r | |
807 | SetMem (VariableStore, VARIABLE_STORE_SIZE, 0xff);\r | |
808 | \r | |
809 | //\r | |
810 | // Variable Specific Data\r | |
811 | //\r | |
812 | *VariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VariableStore;\r | |
813 | *LastVariableOffset = sizeof (VARIABLE_STORE_HEADER);\r | |
814 | \r | |
815 | VariableStore->Signature = VARIABLE_STORE_SIGNATURE;\r | |
816 | VariableStore->Size = VARIABLE_STORE_SIZE;\r | |
817 | VariableStore->Format = VARIABLE_STORE_FORMATTED;\r | |
818 | VariableStore->State = VARIABLE_STORE_HEALTHY;\r | |
819 | VariableStore->Reserved = 0;\r | |
820 | VariableStore->Reserved1 = 0;\r | |
821 | \r | |
822 | return EFI_SUCCESS;\r | |
823 | }\r | |
824 | \r | |
825 | EFI_STATUS\r | |
826 | EFIAPI\r | |
827 | VariableCommonInitialize (\r | |
828 | IN EFI_HANDLE ImageHandle,\r | |
829 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
830 | )\r | |
831 | /*++\r | |
832 | \r | |
833 | Routine Description:\r | |
834 | This function does common initialization for variable services\r | |
835 | \r | |
836 | Arguments:\r | |
837 | \r | |
838 | Returns:\r | |
839 | \r | |
840 | --*/\r | |
841 | {\r | |
842 | EFI_STATUS Status;\r | |
843 | \r | |
844 | //\r | |
845 | // Allocate memory for mVariableModuleGlobal\r | |
846 | //\r | |
847 | mVariableModuleGlobal = (ESAL_VARIABLE_GLOBAL *) AllocateRuntimePool (\r | |
848 | sizeof (ESAL_VARIABLE_GLOBAL)\r | |
849 | );\r | |
850 | if (NULL == mVariableModuleGlobal) {\r | |
851 | return EFI_OUT_OF_RESOURCES;\r | |
852 | }\r | |
853 | //\r | |
854 | // Intialize volatile variable store\r | |
855 | //\r | |
856 | Status = InitializeVariableStore (\r | |
857 | &mVariableModuleGlobal->VariableBase[Physical].VolatileVariableBase,\r | |
858 | &mVariableModuleGlobal->VolatileLastVariableOffset\r | |
859 | );\r | |
860 | \r | |
861 | if (EFI_ERROR (Status)) {\r | |
862 | return Status;\r | |
863 | }\r | |
864 | //\r | |
865 | // Intialize non volatile variable store\r | |
866 | //\r | |
867 | Status = InitializeVariableStore (\r | |
868 | &mVariableModuleGlobal->VariableBase[Physical].NonVolatileVariableBase,\r | |
869 | &mVariableModuleGlobal->NonVolatileLastVariableOffset\r | |
870 | );\r | |
871 | \r | |
872 | return Status;\r | |
873 | }\r |