projects / mirror_edk2.git / blame
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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 | |
| 83758cdc | 5 | Copyright (c) 2009 - 2013, 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 |
| 47 | #define VARIABLE_RECLAIM_THRESHOLD (1024)\r | |
| 275beb2b | 48 | #define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE | \\r |
| 49 | EFI_VARIABLE_BOOTSERVICE_ACCESS | \\r | |
| 50 | EFI_VARIABLE_RUNTIME_ACCESS | \\r | |
| 51 | EFI_VARIABLE_HARDWARE_ERROR_RECORD | \\r | |
| 52 | EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \\r | |
| 53 | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \\r | |
| 54 | EFI_VARIABLE_APPEND_WRITE)\r | |
| 0c18794e | 55 | \r |
| 56 | ///\r | |
| 57 | /// The size of a 3 character ISO639 language code.\r | |
| 58 | ///\r | |
| 59 | #define ISO_639_2_ENTRY_SIZE 3\r | |
| 60 | \r | |
| 9a000b46 RN |
61 | typedef enum {\r |
| 62 | VariableStoreTypeVolatile,\r | |
| 63 | VariableStoreTypeHob,\r | |
| 64 | VariableStoreTypeNv,\r | |
| 65 | VariableStoreTypeMax\r | |
| 66 | } VARIABLE_STORE_TYPE;\r | |
| 67 | \r | |
| 0c18794e | 68 | typedef struct {\r |
| 69 | VARIABLE_HEADER *CurrPtr;\r | |
| 23b06935 SZ |
70 | //\r |
| 71 | // If both ADDED and IN_DELETED_TRANSITION variable are present,\r | |
| 72 | // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one.\r | |
| 73 | // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one,\r | |
| 74 | // and InDeletedTransitionPtr will be NULL at the same time.\r | |
| 75 | //\r | |
| 76 | VARIABLE_HEADER *InDeletedTransitionPtr;\r | |
| 0c18794e | 77 | VARIABLE_HEADER *EndPtr;\r |
| 78 | VARIABLE_HEADER *StartPtr;\r | |
| 79 | BOOLEAN Volatile;\r | |
| 80 | } VARIABLE_POINTER_TRACK;\r | |
| 81 | \r | |
| 82 | typedef struct {\r | |
| 9a000b46 | 83 | EFI_PHYSICAL_ADDRESS HobVariableBase;\r |
| 0c18794e | 84 | EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r |
| 85 | EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r | |
| 86 | EFI_LOCK VariableServicesLock;\r | |
| 87 | UINT32 ReentrantState;\r | |
| 88 | } VARIABLE_GLOBAL;\r | |
| 89 | \r | |
| 90 | typedef struct {\r | |
| 91 | VARIABLE_GLOBAL VariableGlobal;\r | |
| 92 | UINTN VolatileLastVariableOffset;\r | |
| 93 | UINTN NonVolatileLastVariableOffset;\r | |
| 94 | UINTN CommonVariableTotalSize;\r | |
| 95 | UINTN HwErrVariableTotalSize;\r | |
| 96 | CHAR8 *PlatformLangCodes;\r | |
| 97 | CHAR8 *LangCodes;\r | |
| 98 | CHAR8 *PlatformLang;\r | |
| 99 | CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];\r | |
| 100 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance;\r | |
| 101 | } VARIABLE_MODULE_GLOBAL;\r | |
| 102 | \r | |
| 103 | typedef struct {\r | |
| 104 | EFI_GUID *Guid;\r | |
| 105 | CHAR16 *Name;\r | |
| 106 | UINT32 Attributes;\r | |
| 107 | UINTN DataSize;\r | |
| 108 | VOID *Data;\r | |
| 109 | } VARIABLE_CACHE_ENTRY;\r | |
| 110 | \r | |
| 6ab9f441 RN |
111 | typedef struct {\r |
| 112 | EFI_GUID Guid;\r | |
| 113 | CHAR16 *Name;\r | |
| 114 | LIST_ENTRY Link;\r | |
| 115 | } VARIABLE_ENTRY;\r | |
| 116 | \r | |
| 335e2681 SZ |
117 | /**\r |
| 118 | Flush the HOB variable to flash.\r | |
| 119 | \r | |
| 120 | @param[in] VariableName Name of variable has been updated or deleted.\r | |
| 121 | @param[in] VendorGuid Guid of variable has been updated or deleted.\r | |
| 122 | \r | |
| 123 | **/\r | |
| 124 | VOID\r | |
| 125 | FlushHobVariableToFlash (\r | |
| 126 | IN CHAR16 *VariableName,\r | |
| 127 | IN EFI_GUID *VendorGuid\r | |
| 128 | );\r | |
| 129 | \r | |
| 0c18794e | 130 | /**\r |
| 131 | Writes a buffer to variable storage space, in the working block.\r | |
| 132 | \r | |
| 133 | This function writes a buffer to variable storage space into a firmware\r | |
| 134 | volume block device. The destination is specified by the parameter\r | |
| 135 | VariableBase. Fault Tolerant Write protocol is used for writing.\r | |
| 136 | \r | |
| 137 | @param VariableBase Base address of the variable to write.\r | |
| 138 | @param Buffer Point to the data buffer.\r | |
| 139 | @param BufferSize The number of bytes of the data Buffer.\r | |
| 140 | \r | |
| 141 | @retval EFI_SUCCESS The function completed successfully.\r | |
| 142 | @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.\r | |
| 143 | @retval EFI_ABORTED The function could not complete successfully.\r | |
| 144 | \r | |
| 145 | **/\r | |
| 146 | EFI_STATUS\r | |
| 147 | FtwVariableSpace (\r | |
| 148 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
| 149 | IN UINT8 *Buffer,\r | |
| 150 | IN UINTN BufferSize\r | |
| 151 | );\r | |
| 152 | \r | |
| 153 | /**\r | |
| 154 | Finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
| 155 | \r | |
| 156 | This code finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
| 157 | If VariableName is an empty string, then we just return the first\r | |
| 158 | qualified variable without comparing VariableName and VendorGuid.\r | |
| 9622df63 SZ |
159 | If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check\r |
| 160 | at runtime when searching existing variable, only VariableName and VendorGuid are compared.\r | |
| 161 | Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.\r | |
| 0c18794e | 162 | \r |
| ecc722ad | 163 | @param[in] VariableName Name of the variable to be found.\r |
| 164 | @param[in] VendorGuid Vendor GUID to be found.\r | |
| 165 | @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,\r | |
| 0c18794e | 166 | including the range searched and the target position.\r |
| ecc722ad | 167 | @param[in] Global Pointer to VARIABLE_GLOBAL structure, including\r |
| 0c18794e | 168 | base of volatile variable storage area, base of\r |
| 169 | NV variable storage area, and a lock.\r | |
| 9622df63 SZ |
170 | @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r |
| 171 | check at runtime when searching variable.\r | |
| 0c18794e | 172 | \r |
| 173 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r | |
| 174 | VendorGuid is NULL.\r | |
| 175 | @retval EFI_SUCCESS Variable successfully found.\r | |
| ecc722ad | 176 | @retval EFI_NOT_FOUND Variable not found\r |
| 0c18794e | 177 | \r |
| 178 | **/\r | |
| 179 | EFI_STATUS\r | |
| 180 | FindVariable (\r | |
| 181 | IN CHAR16 *VariableName,\r | |
| 182 | IN EFI_GUID *VendorGuid,\r | |
| 183 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
| ecc722ad | 184 | IN VARIABLE_GLOBAL *Global,\r |
| 9622df63 | 185 | IN BOOLEAN IgnoreRtCheck\r |
| 0c18794e | 186 | );\r |
| 187 | \r | |
| 188 | /**\r | |
| 189 | \r | |
| 190 | This code gets the pointer to the variable data.\r | |
| 191 | \r | |
| 192 | @param Variable Pointer to the Variable Header.\r | |
| 193 | \r | |
| 194 | @return Pointer to Variable Data.\r | |
| 195 | \r | |
| 196 | **/\r | |
| 197 | UINT8 *\r | |
| 198 | GetVariableDataPtr (\r | |
| 199 | IN VARIABLE_HEADER *Variable\r | |
| 200 | );\r | |
| 201 | \r | |
| 202 | /**\r | |
| 203 | \r | |
| 204 | This code gets the size of variable data.\r | |
| 205 | \r | |
| 206 | @param Variable Pointer to the Variable Header.\r | |
| 207 | \r | |
| 208 | @return Size of variable in bytes.\r | |
| 209 | \r | |
| 210 | **/\r | |
| 211 | UINTN\r | |
| 212 | DataSizeOfVariable (\r | |
| 213 | IN VARIABLE_HEADER *Variable\r | |
| 214 | );\r | |
| 215 | \r | |
| 216 | /**\r | |
| 217 | Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,\r | |
| 218 | index of associated public key is needed.\r | |
| 219 | \r | |
| 220 | @param[in] VariableName Name of variable.\r | |
| 221 | @param[in] VendorGuid Guid of variable.\r | |
| 222 | @param[in] Data Variable data.\r | |
| 223 | @param[in] DataSize Size of data. 0 means delete.\r | |
| 224 | @param[in] Attributes Attributes of the variable.\r | |
| 225 | @param[in] KeyIndex Index of associated public key.\r | |
| 226 | @param[in] MonotonicCount Value of associated monotonic count.\r | |
| 23b06935 | 227 | @param[in, out] Variable The variable information that is used to keep track of variable usage.\r |
| 0c18794e | 228 | \r |
| 229 | @param[in] TimeStamp Value of associated TimeStamp.\r | |
| 230 | \r | |
| 231 | @retval EFI_SUCCESS The update operation is success.\r | |
| 232 | @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region.\r | |
| 233 | \r | |
| 234 | **/\r | |
| 235 | EFI_STATUS\r | |
| 236 | UpdateVariable (\r | |
| 237 | IN CHAR16 *VariableName,\r | |
| 238 | IN EFI_GUID *VendorGuid,\r | |
| 239 | IN VOID *Data,\r | |
| 240 | IN UINTN DataSize,\r | |
| 241 | IN UINT32 Attributes OPTIONAL,\r | |
| 242 | IN UINT32 KeyIndex OPTIONAL,\r | |
| 243 | IN UINT64 MonotonicCount OPTIONAL,\r | |
| 23b06935 | 244 | IN OUT VARIABLE_POINTER_TRACK *Variable,\r |
| 0c18794e | 245 | IN EFI_TIME *TimeStamp OPTIONAL \r |
| 246 | );\r | |
| 247 | \r | |
| 248 | \r | |
| 249 | /**\r | |
| 250 | Return TRUE if ExitBootServices () has been called.\r | |
| 251 | \r | |
| 252 | @retval TRUE If ExitBootServices () has been called.\r | |
| 253 | **/\r | |
| 254 | BOOLEAN\r | |
| 255 | AtRuntime (\r | |
| 256 | VOID\r | |
| 257 | );\r | |
| 258 | \r | |
| 259 | /**\r | |
| 260 | Initializes a basic mutual exclusion lock.\r | |
| 261 | \r | |
| 262 | This function initializes a basic mutual exclusion lock to the released state \r | |
| 263 | and returns the lock. Each lock provides mutual exclusion access at its task \r | |
| 264 | priority level. Since there is no preemption or multiprocessor support in EFI,\r | |
| 265 | acquiring the lock only consists of raising to the locks TPL.\r | |
| 266 | If Lock is NULL, then ASSERT().\r | |
| 267 | If Priority is not a valid TPL value, then ASSERT().\r | |
| 268 | \r | |
| 269 | @param Lock A pointer to the lock data structure to initialize.\r | |
| 270 | @param Priority EFI TPL is associated with the lock.\r | |
| 271 | \r | |
| 272 | @return The lock.\r | |
| 273 | \r | |
| 274 | **/\r | |
| 275 | EFI_LOCK *\r | |
| 276 | InitializeLock (\r | |
| 277 | IN OUT EFI_LOCK *Lock,\r | |
| 278 | IN EFI_TPL Priority\r | |
| 279 | );\r | |
| 280 | \r | |
| 281 | \r | |
| 282 | /**\r | |
| 283 | Acquires lock only at boot time. Simply returns at runtime.\r | |
| 284 | \r | |
| 285 | This is a temperary function that will be removed when\r | |
| 286 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
| 287 | Runtimer driver in RT phase.\r | |
| 288 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
| 289 | at runtime.\r | |
| 290 | \r | |
| 291 | @param Lock A pointer to the lock to acquire.\r | |
| 292 | \r | |
| 293 | **/\r | |
| 294 | VOID\r | |
| 295 | AcquireLockOnlyAtBootTime (\r | |
| 296 | IN EFI_LOCK *Lock\r | |
| 297 | );\r | |
| 298 | \r | |
| 299 | \r | |
| 300 | /**\r | |
| 301 | Releases lock only at boot time. Simply returns at runtime.\r | |
| 302 | \r | |
| 303 | This is a temperary function which will be removed when\r | |
| 304 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
| 305 | Runtimer driver in RT phase.\r | |
| 306 | It calls EfiReleaseLock() at boot time and simply returns\r | |
| 307 | at runtime.\r | |
| 308 | \r | |
| 309 | @param Lock A pointer to the lock to release.\r | |
| 310 | \r | |
| 311 | **/\r | |
| 312 | VOID\r | |
| 313 | ReleaseLockOnlyAtBootTime (\r | |
| 314 | IN EFI_LOCK *Lock\r | |
| 315 | ); \r | |
| 316 | \r | |
| 317 | /**\r | |
| 318 | Retrive the FVB protocol interface by HANDLE.\r | |
| 319 | \r | |
| 320 | @param[in] FvBlockHandle The handle of FVB protocol that provides services for\r | |
| 321 | reading, writing, and erasing the target block.\r | |
| 322 | @param[out] FvBlock The interface of FVB protocol\r | |
| 323 | \r | |
| 324 | @retval EFI_SUCCESS The interface information for the specified protocol was returned.\r | |
| 325 | @retval EFI_UNSUPPORTED The device does not support the FVB protocol.\r | |
| 326 | @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.\r | |
| 327 | \r | |
| 328 | **/\r | |
| 329 | EFI_STATUS\r | |
| 330 | GetFvbByHandle (\r | |
| 331 | IN EFI_HANDLE FvBlockHandle,\r | |
| 332 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
| 333 | );\r | |
| 334 | \r | |
| 335 | \r | |
| 336 | /**\r | |
| 337 | Retrive the Swap Address Range protocol interface.\r | |
| 338 | \r | |
| 339 | @param[out] SarProtocol The interface of SAR protocol\r | |
| 340 | \r | |
| 341 | @retval EFI_SUCCESS The SAR protocol instance was found and returned in SarProtocol.\r | |
| 342 | @retval EFI_NOT_FOUND The SAR protocol instance was not found.\r | |
| 343 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
| 344 | \r | |
| 345 | **/\r | |
| 346 | EFI_STATUS\r | |
| 347 | GetSarProtocol (\r | |
| 348 | OUT VOID **SarProtocol\r | |
| 349 | );\r | |
| 350 | \r | |
| 351 | /**\r | |
| 352 | Function returns an array of handles that support the FVB protocol\r | |
| 353 | in a buffer allocated from pool. \r | |
| 354 | \r | |
| 355 | @param[out] NumberHandles The number of handles returned in Buffer.\r | |
| 356 | @param[out] Buffer A pointer to the buffer to return the requested\r | |
| 357 | array of handles that support FVB protocol.\r | |
| 358 | \r | |
| 359 | @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r | |
| 360 | handles in Buffer was returned in NumberHandles.\r | |
| 361 | @retval EFI_NOT_FOUND No FVB handle was found.\r | |
| 362 | @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r | |
| 363 | @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r | |
| 364 | \r | |
| 365 | **/\r | |
| 366 | EFI_STATUS\r | |
| 367 | GetFvbCountAndBuffer (\r | |
| 368 | OUT UINTN *NumberHandles,\r | |
| 369 | OUT EFI_HANDLE **Buffer\r | |
| 370 | );\r | |
| 371 | \r | |
| 372 | /**\r | |
| 373 | Initializes variable store area for non-volatile and volatile variable.\r | |
| 374 | \r | |
| 375 | @retval EFI_SUCCESS Function successfully executed.\r | |
| 376 | @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r | |
| 377 | \r | |
| 378 | **/\r | |
| 379 | EFI_STATUS\r | |
| 380 | VariableCommonInitialize (\r | |
| 381 | VOID\r | |
| 382 | );\r | |
| 383 | \r | |
| 83758cdc | 384 | /**\r |
| 385 | \r | |
| 386 | Variable store garbage collection and reclaim operation.\r | |
| 387 | \r | |
| 388 | If ReclaimPubKeyStore is FALSE, reclaim variable space by deleting the obsoleted varaibles.\r | |
| 389 | If ReclaimPubKeyStore is TRUE, reclaim invalid key in public key database and update the PubKeyIndex\r | |
| 390 | for all the count-based authenticate variable in NV storage.\r | |
| 391 | \r | |
| ca5a7d87 | 392 | @param[in] VariableBase Base address of variable store.\r |
| 393 | @param[out] LastVariableOffset Offset of last variable.\r | |
| 394 | @param[in] IsVolatile The variable store is volatile or not;\r | |
| 395 | if it is non-volatile, need FTW.\r | |
| 396 | @param[in, out] UpdatingPtrTrack Pointer to updating variable pointer track structure.\r | |
| 397 | @param[in] ReclaimPubKeyStore Reclaim for public key database or not.\r | |
| 398 | @param[in] ReclaimAnyway If TRUE, do reclaim anyway.\r | |
| 83758cdc | 399 | \r |
| 83758cdc | 400 | @return EFI_SUCCESS Reclaim operation has finished successfully.\r |
| ca5a7d87 | 401 | @return EFI_OUT_OF_RESOURCES No enough memory resources.\r |
| 402 | @return EFI_DEVICE_ERROR The public key database doesn't exist.\r | |
| 83758cdc | 403 | @return Others Unexpect error happened during reclaim operation.\r |
| 404 | \r | |
| 405 | **/\r | |
| 406 | EFI_STATUS\r | |
| 407 | Reclaim (\r | |
| ca5a7d87 | 408 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r |
| 409 | OUT UINTN *LastVariableOffset,\r | |
| 410 | IN BOOLEAN IsVolatile,\r | |
| 411 | IN OUT VARIABLE_POINTER_TRACK *UpdatingPtrTrack,\r | |
| 412 | IN BOOLEAN ReclaimPubKeyStore,\r | |
| 413 | IN BOOLEAN ReclaimAnyway\r | |
| 83758cdc | 414 | );\r |
| 415 | \r | |
| 0c18794e | 416 | /**\r |
| 417 | This function reclaims variable storage if free size is below the threshold.\r | |
| 418 | \r | |
| 419 | **/\r | |
| 420 | VOID\r | |
| 421 | ReclaimForOS(\r | |
| 422 | VOID\r | |
| 423 | ); \r | |
| 424 | \r | |
| 425 | \r | |
| 426 | /**\r | |
| 427 | Initializes variable write service after FVB was ready.\r | |
| 428 | \r | |
| 429 | @retval EFI_SUCCESS Function successfully executed.\r | |
| 430 | @retval Others Fail to initialize the variable service.\r | |
| 431 | \r | |
| 432 | **/\r | |
| 433 | EFI_STATUS\r | |
| 434 | VariableWriteServiceInitialize (\r | |
| 435 | VOID\r | |
| 436 | );\r | |
| 437 | \r | |
| 438 | /**\r | |
| 439 | Retrive the SMM Fault Tolerent Write protocol interface.\r | |
| 440 | \r | |
| 441 | @param[out] FtwProtocol The interface of SMM Ftw protocol\r | |
| 442 | \r | |
| 443 | @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol.\r | |
| 444 | @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found.\r | |
| 445 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
| 446 | \r | |
| 447 | **/\r | |
| 448 | EFI_STATUS\r | |
| 449 | GetFtwProtocol (\r | |
| 450 | OUT VOID **FtwProtocol\r | |
| 451 | );\r | |
| 452 | \r | |
| 453 | /**\r | |
| 454 | Get the proper fvb handle and/or fvb protocol by the given Flash address.\r | |
| 455 | \r | |
| 456 | @param[in] Address The Flash address.\r | |
| 457 | @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.\r | |
| 458 | @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.\r | |
| 459 | \r | |
| 460 | **/\r | |
| 461 | EFI_STATUS\r | |
| 462 | GetFvbInfoByAddress (\r | |
| 463 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
| 464 | OUT EFI_HANDLE *FvbHandle OPTIONAL,\r | |
| 465 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL\r | |
| 466 | );\r | |
| 467 | \r | |
| 468 | /**\r | |
| 469 | \r | |
| 470 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
| 471 | \r | |
| dc204d5a JY |
472 | Caution: This function may receive untrusted input.\r |
| 473 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
| 474 | This function will do basic validation, before parse the data.\r | |
| 475 | \r | |
| 0c18794e | 476 | @param VariableName Name of Variable to be found.\r |
| 477 | @param VendorGuid Variable vendor GUID.\r | |
| 478 | @param Attributes Attribute value of the variable found.\r | |
| 479 | @param DataSize Size of Data found. If size is less than the\r | |
| 480 | data, this value contains the required size.\r | |
| 481 | @param Data Data pointer.\r | |
| 482 | \r | |
| 483 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 484 | @return EFI_SUCCESS Find the specified variable.\r | |
| 485 | @return EFI_NOT_FOUND Not found.\r | |
| 486 | @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
| 487 | \r | |
| 488 | **/\r | |
| 489 | EFI_STATUS\r | |
| 490 | EFIAPI\r | |
| 491 | VariableServiceGetVariable (\r | |
| 492 | IN CHAR16 *VariableName,\r | |
| 493 | IN EFI_GUID *VendorGuid,\r | |
| 494 | OUT UINT32 *Attributes OPTIONAL,\r | |
| 495 | IN OUT UINTN *DataSize,\r | |
| 496 | OUT VOID *Data\r | |
| 497 | );\r | |
| 498 | \r | |
| 499 | /**\r | |
| 500 | \r | |
| 501 | This code Finds the Next available variable.\r | |
| 502 | \r | |
| dc204d5a JY |
503 | Caution: This function may receive untrusted input.\r |
| 504 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
| 505 | \r | |
| 0c18794e | 506 | @param VariableNameSize Size of the variable name.\r |
| 507 | @param VariableName Pointer to variable name.\r | |
| 508 | @param VendorGuid Variable Vendor Guid.\r | |
| 509 | \r | |
| 510 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 511 | @return EFI_SUCCESS Find the specified variable.\r | |
| 512 | @return EFI_NOT_FOUND Not found.\r | |
| 513 | @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
| 514 | \r | |
| 515 | **/\r | |
| 516 | EFI_STATUS\r | |
| 517 | EFIAPI\r | |
| 518 | VariableServiceGetNextVariableName (\r | |
| 519 | IN OUT UINTN *VariableNameSize,\r | |
| 520 | IN OUT CHAR16 *VariableName,\r | |
| 521 | IN OUT EFI_GUID *VendorGuid\r | |
| 522 | );\r | |
| 523 | \r | |
| 524 | /**\r | |
| 525 | \r | |
| 526 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
| 527 | \r | |
| dc204d5a JY |
528 | Caution: This function may receive untrusted input.\r |
| 529 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
| 530 | This function will do basic validation, before parse the data.\r | |
| 531 | This function will parse the authentication carefully to avoid security issues, like\r | |
| 532 | buffer overflow, integer overflow.\r | |
| 533 | This function will check attribute carefully to avoid authentication bypass.\r | |
| 534 | \r | |
| 0c18794e | 535 | @param VariableName Name of Variable to be found.\r |
| 536 | @param VendorGuid Variable vendor GUID.\r | |
| 537 | @param Attributes Attribute value of the variable found\r | |
| 538 | @param DataSize Size of Data found. If size is less than the\r | |
| 539 | data, this value contains the required size.\r | |
| 540 | @param Data Data pointer.\r | |
| 541 | \r | |
| 542 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 543 | @return EFI_SUCCESS Set successfully.\r | |
| 544 | @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
| 545 | @return EFI_NOT_FOUND Not found.\r | |
| 546 | @return EFI_WRITE_PROTECTED Variable is read-only.\r | |
| 547 | \r | |
| 548 | **/\r | |
| 549 | EFI_STATUS\r | |
| 550 | EFIAPI\r | |
| 551 | VariableServiceSetVariable (\r | |
| 552 | IN CHAR16 *VariableName,\r | |
| 553 | IN EFI_GUID *VendorGuid,\r | |
| 554 | IN UINT32 Attributes,\r | |
| 555 | IN UINTN DataSize,\r | |
| 556 | IN VOID *Data\r | |
| 557 | );\r | |
| 558 | \r | |
| 559 | /**\r | |
| 560 | \r | |
| 561 | This code returns information about the EFI variables.\r | |
| 562 | \r | |
| dc204d5a JY |
563 | Caution: This function may receive untrusted input.\r |
| 564 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
| 565 | \r | |
| 0c18794e | 566 | @param Attributes Attributes bitmask to specify the type of variables\r |
| 567 | on which to return information.\r | |
| 568 | @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
| 569 | for the EFI variables associated with the attributes specified.\r | |
| 570 | @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
| 571 | for EFI variables associated with the attributes specified.\r | |
| 572 | @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
| 573 | associated with the attributes specified.\r | |
| 574 | \r | |
| 575 | @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
| 576 | @return EFI_SUCCESS Query successfully.\r | |
| 577 | @return EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
| 578 | \r | |
| 579 | **/\r | |
| 580 | EFI_STATUS\r | |
| 581 | EFIAPI\r | |
| 582 | VariableServiceQueryVariableInfo (\r | |
| 583 | IN UINT32 Attributes,\r | |
| 584 | OUT UINT64 *MaximumVariableStorageSize,\r | |
| 585 | OUT UINT64 *RemainingVariableStorageSize,\r | |
| 586 | OUT UINT64 *MaximumVariableSize\r | |
| 587 | ); \r | |
| 6ab9f441 RN |
588 | \r |
| 589 | /**\r | |
| 590 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
| 591 | \r | |
| 592 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
| 593 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
| 594 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
| 595 | \r | |
| 596 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
| 597 | as pending to be read-only.\r | |
| 598 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
| 599 | Or VariableName is an empty string.\r | |
| 600 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
| 601 | already been signaled.\r | |
| 602 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
| 603 | **/\r | |
| 604 | EFI_STATUS\r | |
| 605 | EFIAPI\r | |
| 606 | VariableLockRequestToLock (\r | |
| 607 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
| 608 | IN CHAR16 *VariableName,\r | |
| 609 | IN EFI_GUID *VendorGuid\r | |
| 610 | );\r | |
| 611 | \r | |
| 0c18794e | 612 | extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r |
| 613 | \r | |
| 614 | #endif\r |