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0c18794e | 1 | /** @file\r |
2 | The internal header file includes the common header files, defines\r | |
3 | internal structure and functions used by Variable modules.\r | |
4 | \r | |
b2bd493e | 5 | Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>\r |
0c18794e | 6 | This program and the accompanying materials \r |
7 | are licensed and made available under the terms and conditions of the BSD License \r | |
8 | which accompanies this distribution. The full text of the license may be found at \r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #ifndef _VARIABLE_H_\r | |
17 | #define _VARIABLE_H_\r | |
18 | \r | |
19 | #include <PiDxe.h>\r | |
20 | #include <Protocol/VariableWrite.h>\r | |
21 | #include <Protocol/FaultTolerantWrite.h>\r | |
22 | #include <Protocol/FirmwareVolumeBlock.h>\r | |
23 | #include <Protocol/Variable.h>\r | |
6ab9f441 | 24 | #include <Protocol/VariableLock.h>\r |
0c18794e | 25 | #include <Library/PcdLib.h>\r |
9a000b46 | 26 | #include <Library/HobLib.h>\r |
0c18794e | 27 | #include <Library/UefiDriverEntryPoint.h>\r |
28 | #include <Library/DxeServicesTableLib.h>\r | |
29 | #include <Library/UefiRuntimeLib.h>\r | |
30 | #include <Library/DebugLib.h>\r | |
31 | #include <Library/BaseMemoryLib.h>\r | |
32 | #include <Library/UefiBootServicesTableLib.h>\r | |
33 | #include <Library/UefiLib.h>\r | |
34 | #include <Library/BaseLib.h>\r | |
35 | #include <Library/SynchronizationLib.h>\r | |
36 | #include <Library/MemoryAllocationLib.h>\r | |
37 | #include <Library/BaseCryptLib.h>\r | |
38 | #include <Library/PlatformSecureLib.h>\r | |
39 | #include <Guid/GlobalVariable.h>\r | |
40 | #include <Guid/EventGroup.h>\r | |
41 | #include <Guid/AuthenticatedVariableFormat.h>\r | |
42 | #include <Guid/ImageAuthentication.h>\r | |
4d832aab | 43 | #include <Guid/SystemNvDataGuid.h>\r |
039a40aa | 44 | #include <Guid/FaultTolerantWrite.h>\r |
a5f15e30 | 45 | #include <Guid/HardwareErrorVariable.h>\r |
0c18794e | 46 | \r |
275beb2b | 47 | #define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE | \\r |
48 | EFI_VARIABLE_BOOTSERVICE_ACCESS | \\r | |
49 | EFI_VARIABLE_RUNTIME_ACCESS | \\r | |
50 | EFI_VARIABLE_HARDWARE_ERROR_RECORD | \\r | |
51 | EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \\r | |
52 | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \\r | |
53 | EFI_VARIABLE_APPEND_WRITE)\r | |
0c18794e | 54 | \r |
6675a21f SZ |
55 | #define VARIABLE_ATTRIBUTE_BS_RT (EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS)\r |
56 | #define VARIABLE_ATTRIBUTE_NV_BS_RT (VARIABLE_ATTRIBUTE_BS_RT | EFI_VARIABLE_NON_VOLATILE)\r | |
57 | #define VARIABLE_ATTRIBUTE_NV_BS_RT_AT (VARIABLE_ATTRIBUTE_NV_BS_RT | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS)\r | |
58 | \r | |
59 | typedef struct {\r | |
60 | CHAR16 *Name;\r | |
61 | UINT32 Attributes;\r | |
62 | } GLOBAL_VARIABLE_ENTRY;\r | |
63 | \r | |
0c18794e | 64 | ///\r |
65 | /// The size of a 3 character ISO639 language code.\r | |
66 | ///\r | |
67 | #define ISO_639_2_ENTRY_SIZE 3\r | |
68 | \r | |
9a000b46 RN |
69 | typedef enum {\r |
70 | VariableStoreTypeVolatile,\r | |
71 | VariableStoreTypeHob,\r | |
72 | VariableStoreTypeNv,\r | |
73 | VariableStoreTypeMax\r | |
74 | } VARIABLE_STORE_TYPE;\r | |
75 | \r | |
0c18794e | 76 | typedef struct {\r |
77 | VARIABLE_HEADER *CurrPtr;\r | |
23b06935 SZ |
78 | //\r |
79 | // If both ADDED and IN_DELETED_TRANSITION variable are present,\r | |
80 | // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one.\r | |
81 | // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one,\r | |
82 | // and InDeletedTransitionPtr will be NULL at the same time.\r | |
83 | //\r | |
84 | VARIABLE_HEADER *InDeletedTransitionPtr;\r | |
0c18794e | 85 | VARIABLE_HEADER *EndPtr;\r |
86 | VARIABLE_HEADER *StartPtr;\r | |
87 | BOOLEAN Volatile;\r | |
88 | } VARIABLE_POINTER_TRACK;\r | |
89 | \r | |
90 | typedef struct {\r | |
9a000b46 | 91 | EFI_PHYSICAL_ADDRESS HobVariableBase;\r |
0c18794e | 92 | EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r |
93 | EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r | |
94 | EFI_LOCK VariableServicesLock;\r | |
95 | UINT32 ReentrantState;\r | |
96 | } VARIABLE_GLOBAL;\r | |
97 | \r | |
98 | typedef struct {\r | |
99 | VARIABLE_GLOBAL VariableGlobal;\r | |
100 | UINTN VolatileLastVariableOffset;\r | |
101 | UINTN NonVolatileLastVariableOffset;\r | |
102 | UINTN CommonVariableTotalSize;\r | |
103 | UINTN HwErrVariableTotalSize;\r | |
104 | CHAR8 *PlatformLangCodes;\r | |
105 | CHAR8 *LangCodes;\r | |
106 | CHAR8 *PlatformLang;\r | |
107 | CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];\r | |
108 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance;\r | |
109 | } VARIABLE_MODULE_GLOBAL;\r | |
110 | \r | |
111 | typedef struct {\r | |
112 | EFI_GUID *Guid;\r | |
113 | CHAR16 *Name;\r | |
b2bd493e SZ |
114 | UINTN VariableSize;\r |
115 | } VARIABLE_ENTRY_CONSISTENCY;\r | |
0c18794e | 116 | \r |
6ab9f441 RN |
117 | typedef struct {\r |
118 | EFI_GUID Guid;\r | |
119 | CHAR16 *Name;\r | |
120 | LIST_ENTRY Link;\r | |
121 | } VARIABLE_ENTRY;\r | |
122 | \r | |
335e2681 SZ |
123 | /**\r |
124 | Flush the HOB variable to flash.\r | |
125 | \r | |
126 | @param[in] VariableName Name of variable has been updated or deleted.\r | |
127 | @param[in] VendorGuid Guid of variable has been updated or deleted.\r | |
128 | \r | |
129 | **/\r | |
130 | VOID\r | |
131 | FlushHobVariableToFlash (\r | |
132 | IN CHAR16 *VariableName,\r | |
133 | IN EFI_GUID *VendorGuid\r | |
134 | );\r | |
135 | \r | |
0c18794e | 136 | /**\r |
137 | Writes a buffer to variable storage space, in the working block.\r | |
138 | \r | |
139 | This function writes a buffer to variable storage space into a firmware\r | |
140 | volume block device. The destination is specified by the parameter\r | |
141 | VariableBase. Fault Tolerant Write protocol is used for writing.\r | |
142 | \r | |
143 | @param VariableBase Base address of the variable to write.\r | |
128ef095 | 144 | @param VariableBuffer Point to the variable data buffer.\r |
0c18794e | 145 | \r |
146 | @retval EFI_SUCCESS The function completed successfully.\r | |
147 | @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.\r | |
148 | @retval EFI_ABORTED The function could not complete successfully.\r | |
149 | \r | |
150 | **/\r | |
151 | EFI_STATUS\r | |
152 | FtwVariableSpace (\r | |
153 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
128ef095 | 154 | IN VARIABLE_STORE_HEADER *VariableBuffer\r |
0c18794e | 155 | );\r |
156 | \r | |
157 | /**\r | |
158 | Finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
159 | \r | |
160 | This code finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
161 | If VariableName is an empty string, then we just return the first\r | |
162 | qualified variable without comparing VariableName and VendorGuid.\r | |
9622df63 SZ |
163 | If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check\r |
164 | at runtime when searching existing variable, only VariableName and VendorGuid are compared.\r | |
165 | Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.\r | |
0c18794e | 166 | \r |
ecc722ad | 167 | @param[in] VariableName Name of the variable to be found.\r |
168 | @param[in] VendorGuid Vendor GUID to be found.\r | |
169 | @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,\r | |
0c18794e | 170 | including the range searched and the target position.\r |
ecc722ad | 171 | @param[in] Global Pointer to VARIABLE_GLOBAL structure, including\r |
0c18794e | 172 | base of volatile variable storage area, base of\r |
173 | NV variable storage area, and a lock.\r | |
9622df63 SZ |
174 | @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r |
175 | check at runtime when searching variable.\r | |
0c18794e | 176 | \r |
177 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r | |
178 | VendorGuid is NULL.\r | |
179 | @retval EFI_SUCCESS Variable successfully found.\r | |
ecc722ad | 180 | @retval EFI_NOT_FOUND Variable not found\r |
0c18794e | 181 | \r |
182 | **/\r | |
183 | EFI_STATUS\r | |
184 | FindVariable (\r | |
185 | IN CHAR16 *VariableName,\r | |
186 | IN EFI_GUID *VendorGuid,\r | |
187 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
ecc722ad | 188 | IN VARIABLE_GLOBAL *Global,\r |
9622df63 | 189 | IN BOOLEAN IgnoreRtCheck\r |
0c18794e | 190 | );\r |
191 | \r | |
192 | /**\r | |
193 | \r | |
194 | This code gets the pointer to the variable data.\r | |
195 | \r | |
196 | @param Variable Pointer to the Variable Header.\r | |
197 | \r | |
198 | @return Pointer to Variable Data.\r | |
199 | \r | |
200 | **/\r | |
201 | UINT8 *\r | |
202 | GetVariableDataPtr (\r | |
203 | IN VARIABLE_HEADER *Variable\r | |
204 | );\r | |
205 | \r | |
206 | /**\r | |
207 | \r | |
208 | This code gets the size of variable data.\r | |
209 | \r | |
210 | @param Variable Pointer to the Variable Header.\r | |
211 | \r | |
212 | @return Size of variable in bytes.\r | |
213 | \r | |
214 | **/\r | |
215 | UINTN\r | |
216 | DataSizeOfVariable (\r | |
217 | IN VARIABLE_HEADER *Variable\r | |
218 | );\r | |
219 | \r | |
9a12e582 DG |
220 | /**\r |
221 | This function is to check if the remaining variable space is enough to set\r | |
222 | all Variables from argument list successfully. The purpose of the check\r | |
223 | is to keep the consistency of the Variables to be in variable storage.\r | |
224 | \r | |
225 | Note: Variables are assumed to be in same storage.\r | |
226 | The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r | |
227 | so follow the argument sequence to check the Variables.\r | |
228 | \r | |
229 | @param[in] Attributes Variable attributes for Variable entries.\r | |
230 | @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r | |
231 | A NULL terminates the list. The VariableSize of \r | |
232 | VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r | |
233 | It will be changed to variable total size as output.\r | |
234 | \r | |
235 | @retval TRUE Have enough variable space to set the Variables successfully.\r | |
236 | @retval FALSE No enough variable space to set the Variables successfully.\r | |
237 | \r | |
238 | **/\r | |
239 | BOOLEAN\r | |
240 | EFIAPI\r | |
241 | CheckRemainingSpaceForConsistency (\r | |
242 | IN UINT32 Attributes,\r | |
243 | ...\r | |
244 | );\r | |
245 | \r | |
0c18794e | 246 | /**\r |
247 | Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,\r | |
248 | index of associated public key is needed.\r | |
249 | \r | |
250 | @param[in] VariableName Name of variable.\r | |
251 | @param[in] VendorGuid Guid of variable.\r | |
252 | @param[in] Data Variable data.\r | |
253 | @param[in] DataSize Size of data. 0 means delete.\r | |
254 | @param[in] Attributes Attributes of the variable.\r | |
255 | @param[in] KeyIndex Index of associated public key.\r | |
256 | @param[in] MonotonicCount Value of associated monotonic count.\r | |
23b06935 | 257 | @param[in, out] Variable The variable information that is used to keep track of variable usage.\r |
0c18794e | 258 | \r |
259 | @param[in] TimeStamp Value of associated TimeStamp.\r | |
260 | \r | |
261 | @retval EFI_SUCCESS The update operation is success.\r | |
262 | @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region.\r | |
263 | \r | |
264 | **/\r | |
265 | EFI_STATUS\r | |
266 | UpdateVariable (\r | |
267 | IN CHAR16 *VariableName,\r | |
268 | IN EFI_GUID *VendorGuid,\r | |
269 | IN VOID *Data,\r | |
270 | IN UINTN DataSize,\r | |
271 | IN UINT32 Attributes OPTIONAL,\r | |
272 | IN UINT32 KeyIndex OPTIONAL,\r | |
273 | IN UINT64 MonotonicCount OPTIONAL,\r | |
23b06935 | 274 | IN OUT VARIABLE_POINTER_TRACK *Variable,\r |
0c18794e | 275 | IN EFI_TIME *TimeStamp OPTIONAL \r |
276 | );\r | |
277 | \r | |
278 | \r | |
279 | /**\r | |
280 | Return TRUE if ExitBootServices () has been called.\r | |
281 | \r | |
282 | @retval TRUE If ExitBootServices () has been called.\r | |
283 | **/\r | |
284 | BOOLEAN\r | |
285 | AtRuntime (\r | |
286 | VOID\r | |
287 | );\r | |
288 | \r | |
289 | /**\r | |
290 | Initializes a basic mutual exclusion lock.\r | |
291 | \r | |
292 | This function initializes a basic mutual exclusion lock to the released state \r | |
293 | and returns the lock. Each lock provides mutual exclusion access at its task \r | |
294 | priority level. Since there is no preemption or multiprocessor support in EFI,\r | |
295 | acquiring the lock only consists of raising to the locks TPL.\r | |
296 | If Lock is NULL, then ASSERT().\r | |
297 | If Priority is not a valid TPL value, then ASSERT().\r | |
298 | \r | |
299 | @param Lock A pointer to the lock data structure to initialize.\r | |
300 | @param Priority EFI TPL is associated with the lock.\r | |
301 | \r | |
302 | @return The lock.\r | |
303 | \r | |
304 | **/\r | |
305 | EFI_LOCK *\r | |
306 | InitializeLock (\r | |
307 | IN OUT EFI_LOCK *Lock,\r | |
308 | IN EFI_TPL Priority\r | |
309 | );\r | |
310 | \r | |
311 | \r | |
312 | /**\r | |
313 | Acquires lock only at boot time. Simply returns at runtime.\r | |
314 | \r | |
315 | This is a temperary function that will be removed when\r | |
316 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
317 | Runtimer driver in RT phase.\r | |
318 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
319 | at runtime.\r | |
320 | \r | |
321 | @param Lock A pointer to the lock to acquire.\r | |
322 | \r | |
323 | **/\r | |
324 | VOID\r | |
325 | AcquireLockOnlyAtBootTime (\r | |
326 | IN EFI_LOCK *Lock\r | |
327 | );\r | |
328 | \r | |
329 | \r | |
330 | /**\r | |
331 | Releases lock only at boot time. Simply returns at runtime.\r | |
332 | \r | |
333 | This is a temperary function which will be removed when\r | |
334 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
335 | Runtimer driver in RT phase.\r | |
336 | It calls EfiReleaseLock() at boot time and simply returns\r | |
337 | at runtime.\r | |
338 | \r | |
339 | @param Lock A pointer to the lock to release.\r | |
340 | \r | |
341 | **/\r | |
342 | VOID\r | |
343 | ReleaseLockOnlyAtBootTime (\r | |
344 | IN EFI_LOCK *Lock\r | |
345 | ); \r | |
346 | \r | |
347 | /**\r | |
348 | Retrive the FVB protocol interface by HANDLE.\r | |
349 | \r | |
350 | @param[in] FvBlockHandle The handle of FVB protocol that provides services for\r | |
351 | reading, writing, and erasing the target block.\r | |
352 | @param[out] FvBlock The interface of FVB protocol\r | |
353 | \r | |
354 | @retval EFI_SUCCESS The interface information for the specified protocol was returned.\r | |
355 | @retval EFI_UNSUPPORTED The device does not support the FVB protocol.\r | |
356 | @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.\r | |
357 | \r | |
358 | **/\r | |
359 | EFI_STATUS\r | |
360 | GetFvbByHandle (\r | |
361 | IN EFI_HANDLE FvBlockHandle,\r | |
362 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
363 | );\r | |
364 | \r | |
365 | \r | |
366 | /**\r | |
367 | Retrive the Swap Address Range protocol interface.\r | |
368 | \r | |
369 | @param[out] SarProtocol The interface of SAR protocol\r | |
370 | \r | |
371 | @retval EFI_SUCCESS The SAR protocol instance was found and returned in SarProtocol.\r | |
372 | @retval EFI_NOT_FOUND The SAR protocol instance was not found.\r | |
373 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
374 | \r | |
375 | **/\r | |
376 | EFI_STATUS\r | |
377 | GetSarProtocol (\r | |
378 | OUT VOID **SarProtocol\r | |
379 | );\r | |
380 | \r | |
381 | /**\r | |
382 | Function returns an array of handles that support the FVB protocol\r | |
383 | in a buffer allocated from pool. \r | |
384 | \r | |
385 | @param[out] NumberHandles The number of handles returned in Buffer.\r | |
386 | @param[out] Buffer A pointer to the buffer to return the requested\r | |
387 | array of handles that support FVB protocol.\r | |
388 | \r | |
389 | @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r | |
390 | handles in Buffer was returned in NumberHandles.\r | |
391 | @retval EFI_NOT_FOUND No FVB handle was found.\r | |
392 | @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r | |
393 | @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r | |
394 | \r | |
395 | **/\r | |
396 | EFI_STATUS\r | |
397 | GetFvbCountAndBuffer (\r | |
398 | OUT UINTN *NumberHandles,\r | |
399 | OUT EFI_HANDLE **Buffer\r | |
400 | );\r | |
401 | \r | |
402 | /**\r | |
403 | Initializes variable store area for non-volatile and volatile variable.\r | |
404 | \r | |
405 | @retval EFI_SUCCESS Function successfully executed.\r | |
406 | @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r | |
407 | \r | |
408 | **/\r | |
409 | EFI_STATUS\r | |
410 | VariableCommonInitialize (\r | |
411 | VOID\r | |
412 | );\r | |
413 | \r | |
83758cdc | 414 | /**\r |
415 | \r | |
416 | Variable store garbage collection and reclaim operation.\r | |
417 | \r | |
418 | If ReclaimPubKeyStore is FALSE, reclaim variable space by deleting the obsoleted varaibles.\r | |
419 | If ReclaimPubKeyStore is TRUE, reclaim invalid key in public key database and update the PubKeyIndex\r | |
420 | for all the count-based authenticate variable in NV storage.\r | |
421 | \r | |
ca5a7d87 | 422 | @param[in] VariableBase Base address of variable store.\r |
423 | @param[out] LastVariableOffset Offset of last variable.\r | |
424 | @param[in] IsVolatile The variable store is volatile or not;\r | |
425 | if it is non-volatile, need FTW.\r | |
426 | @param[in, out] UpdatingPtrTrack Pointer to updating variable pointer track structure.\r | |
7baf3c69 SZ |
427 | @param[in] NewVariable Pointer to new variable.\r |
428 | @param[in] NewVariableSize New variable size.\r | |
ca5a7d87 | 429 | @param[in] ReclaimPubKeyStore Reclaim for public key database or not.\r |
83758cdc | 430 | \r |
83758cdc | 431 | @return EFI_SUCCESS Reclaim operation has finished successfully.\r |
7baf3c69 | 432 | @return EFI_OUT_OF_RESOURCES No enough memory resources or variable space.\r |
ca5a7d87 | 433 | @return EFI_DEVICE_ERROR The public key database doesn't exist.\r |
83758cdc | 434 | @return Others Unexpect error happened during reclaim operation.\r |
435 | \r | |
436 | **/\r | |
437 | EFI_STATUS\r | |
438 | Reclaim (\r | |
ca5a7d87 | 439 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r |
440 | OUT UINTN *LastVariableOffset,\r | |
441 | IN BOOLEAN IsVolatile,\r | |
442 | IN OUT VARIABLE_POINTER_TRACK *UpdatingPtrTrack,\r | |
7baf3c69 SZ |
443 | IN VARIABLE_HEADER *NewVariable,\r |
444 | IN UINTN NewVariableSize,\r | |
445 | IN BOOLEAN ReclaimPubKeyStore\r | |
83758cdc | 446 | );\r |
447 | \r | |
0c18794e | 448 | /**\r |
449 | This function reclaims variable storage if free size is below the threshold.\r | |
450 | \r | |
451 | **/\r | |
452 | VOID\r | |
453 | ReclaimForOS(\r | |
454 | VOID\r | |
455 | ); \r | |
456 | \r | |
457 | \r | |
458 | /**\r | |
459 | Initializes variable write service after FVB was ready.\r | |
460 | \r | |
461 | @retval EFI_SUCCESS Function successfully executed.\r | |
462 | @retval Others Fail to initialize the variable service.\r | |
463 | \r | |
464 | **/\r | |
465 | EFI_STATUS\r | |
466 | VariableWriteServiceInitialize (\r | |
467 | VOID\r | |
468 | );\r | |
469 | \r | |
470 | /**\r | |
471 | Retrive the SMM Fault Tolerent Write protocol interface.\r | |
472 | \r | |
473 | @param[out] FtwProtocol The interface of SMM Ftw protocol\r | |
474 | \r | |
475 | @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol.\r | |
476 | @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found.\r | |
477 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
478 | \r | |
479 | **/\r | |
480 | EFI_STATUS\r | |
481 | GetFtwProtocol (\r | |
482 | OUT VOID **FtwProtocol\r | |
483 | );\r | |
484 | \r | |
485 | /**\r | |
486 | Get the proper fvb handle and/or fvb protocol by the given Flash address.\r | |
487 | \r | |
488 | @param[in] Address The Flash address.\r | |
489 | @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.\r | |
490 | @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.\r | |
491 | \r | |
492 | **/\r | |
493 | EFI_STATUS\r | |
494 | GetFvbInfoByAddress (\r | |
495 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
496 | OUT EFI_HANDLE *FvbHandle OPTIONAL,\r | |
497 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL\r | |
498 | );\r | |
499 | \r | |
500 | /**\r | |
501 | \r | |
502 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
503 | \r | |
dc204d5a JY |
504 | Caution: This function may receive untrusted input.\r |
505 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
506 | This function will do basic validation, before parse the data.\r | |
507 | \r | |
0c18794e | 508 | @param VariableName Name of Variable to be found.\r |
509 | @param VendorGuid Variable vendor GUID.\r | |
510 | @param Attributes Attribute value of the variable found.\r | |
511 | @param DataSize Size of Data found. If size is less than the\r | |
512 | data, this value contains the required size.\r | |
513 | @param Data Data pointer.\r | |
514 | \r | |
515 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
516 | @return EFI_SUCCESS Find the specified variable.\r | |
517 | @return EFI_NOT_FOUND Not found.\r | |
518 | @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
519 | \r | |
520 | **/\r | |
521 | EFI_STATUS\r | |
522 | EFIAPI\r | |
523 | VariableServiceGetVariable (\r | |
524 | IN CHAR16 *VariableName,\r | |
525 | IN EFI_GUID *VendorGuid,\r | |
526 | OUT UINT32 *Attributes OPTIONAL,\r | |
527 | IN OUT UINTN *DataSize,\r | |
528 | OUT VOID *Data\r | |
529 | );\r | |
530 | \r | |
531 | /**\r | |
532 | \r | |
533 | This code Finds the Next available variable.\r | |
534 | \r | |
dc204d5a JY |
535 | Caution: This function may receive untrusted input.\r |
536 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
537 | \r | |
0c18794e | 538 | @param VariableNameSize Size of the variable name.\r |
539 | @param VariableName Pointer to variable name.\r | |
540 | @param VendorGuid Variable Vendor Guid.\r | |
541 | \r | |
542 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
543 | @return EFI_SUCCESS Find the specified variable.\r | |
544 | @return EFI_NOT_FOUND Not found.\r | |
545 | @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
546 | \r | |
547 | **/\r | |
548 | EFI_STATUS\r | |
549 | EFIAPI\r | |
550 | VariableServiceGetNextVariableName (\r | |
551 | IN OUT UINTN *VariableNameSize,\r | |
552 | IN OUT CHAR16 *VariableName,\r | |
553 | IN OUT EFI_GUID *VendorGuid\r | |
554 | );\r | |
555 | \r | |
556 | /**\r | |
557 | \r | |
558 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
559 | \r | |
dc204d5a JY |
560 | Caution: This function may receive untrusted input.\r |
561 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
562 | This function will do basic validation, before parse the data.\r | |
563 | This function will parse the authentication carefully to avoid security issues, like\r | |
564 | buffer overflow, integer overflow.\r | |
565 | This function will check attribute carefully to avoid authentication bypass.\r | |
566 | \r | |
0c18794e | 567 | @param VariableName Name of Variable to be found.\r |
568 | @param VendorGuid Variable vendor GUID.\r | |
569 | @param Attributes Attribute value of the variable found\r | |
570 | @param DataSize Size of Data found. If size is less than the\r | |
571 | data, this value contains the required size.\r | |
572 | @param Data Data pointer.\r | |
573 | \r | |
574 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
575 | @return EFI_SUCCESS Set successfully.\r | |
576 | @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
577 | @return EFI_NOT_FOUND Not found.\r | |
578 | @return EFI_WRITE_PROTECTED Variable is read-only.\r | |
579 | \r | |
580 | **/\r | |
581 | EFI_STATUS\r | |
582 | EFIAPI\r | |
583 | VariableServiceSetVariable (\r | |
584 | IN CHAR16 *VariableName,\r | |
585 | IN EFI_GUID *VendorGuid,\r | |
586 | IN UINT32 Attributes,\r | |
587 | IN UINTN DataSize,\r | |
588 | IN VOID *Data\r | |
589 | );\r | |
590 | \r | |
b2bd493e SZ |
591 | /**\r |
592 | \r | |
593 | This code returns information about the EFI variables.\r | |
594 | \r | |
595 | Caution: This function may receive untrusted input.\r | |
596 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
597 | \r | |
598 | @param Attributes Attributes bitmask to specify the type of variables\r | |
599 | on which to return information.\r | |
600 | @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
601 | for the EFI variables associated with the attributes specified.\r | |
602 | @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
603 | for EFI variables associated with the attributes specified.\r | |
604 | @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
605 | associated with the attributes specified.\r | |
606 | \r | |
607 | @return EFI_SUCCESS Query successfully.\r | |
608 | \r | |
609 | **/\r | |
610 | EFI_STATUS\r | |
611 | EFIAPI\r | |
612 | VariableServiceQueryVariableInfoInternal (\r | |
613 | IN UINT32 Attributes,\r | |
614 | OUT UINT64 *MaximumVariableStorageSize,\r | |
615 | OUT UINT64 *RemainingVariableStorageSize,\r | |
616 | OUT UINT64 *MaximumVariableSize\r | |
617 | );\r | |
618 | \r | |
0c18794e | 619 | /**\r |
620 | \r | |
621 | This code returns information about the EFI variables.\r | |
622 | \r | |
dc204d5a JY |
623 | Caution: This function may receive untrusted input.\r |
624 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
625 | \r | |
0c18794e | 626 | @param Attributes Attributes bitmask to specify the type of variables\r |
627 | on which to return information.\r | |
628 | @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
629 | for the EFI variables associated with the attributes specified.\r | |
630 | @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
631 | for EFI variables associated with the attributes specified.\r | |
632 | @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
633 | associated with the attributes specified.\r | |
634 | \r | |
635 | @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
636 | @return EFI_SUCCESS Query successfully.\r | |
637 | @return EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
638 | \r | |
639 | **/\r | |
640 | EFI_STATUS\r | |
641 | EFIAPI\r | |
642 | VariableServiceQueryVariableInfo (\r | |
643 | IN UINT32 Attributes,\r | |
644 | OUT UINT64 *MaximumVariableStorageSize,\r | |
645 | OUT UINT64 *RemainingVariableStorageSize,\r | |
646 | OUT UINT64 *MaximumVariableSize\r | |
647 | ); \r | |
6ab9f441 RN |
648 | \r |
649 | /**\r | |
650 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
651 | \r | |
652 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
653 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
654 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
655 | \r | |
656 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
657 | as pending to be read-only.\r | |
658 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
659 | Or VariableName is an empty string.\r | |
660 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
661 | already been signaled.\r | |
662 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
663 | **/\r | |
664 | EFI_STATUS\r | |
665 | EFIAPI\r | |
666 | VariableLockRequestToLock (\r | |
667 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
668 | IN CHAR16 *VariableName,\r | |
669 | IN EFI_GUID *VendorGuid\r | |
670 | );\r | |
671 | \r | |
0c18794e | 672 | extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r |
673 | \r | |
674 | #endif\r |