projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 8a2d4996 | 1 | /** @file\r |
| 2 | \r | |
| 3 | Implement all four UEFI Runtime Variable services for the nonvolatile\r | |
| 4 | and volatile storage space and install variable architecture protocol\r | |
| 5 | based on SMM variable module.\r | |
| 6 | \r | |
| aab9212f | 7 | Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>\r |
| 8a2d4996 | 8 | This program and the accompanying materials \r |
| 9 | are licensed and made available under the terms and conditions of the BSD License \r | |
| 10 | which accompanies this distribution. The full text of the license may be found at \r | |
| 11 | http://opensource.org/licenses/bsd-license.php \r | |
| 12 | \r | |
| 13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
| 14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
| 15 | \r | |
| 16 | **/\r | |
| d00ed85e | 17 | #include <PiDxe.h>\r |
| 8a2d4996 | 18 | #include <Protocol/VariableWrite.h>\r |
| 19 | #include <Protocol/Variable.h>\r | |
| 20 | #include <Protocol/SmmCommunication.h>\r | |
| d00ed85e | 21 | #include <Protocol/SmmVariable.h>\r |
| ff843847 | 22 | #include <Protocol/VariableLock.h>\r |
| 8a2d4996 | 23 | \r |
| 24 | #include <Library/UefiBootServicesTableLib.h>\r | |
| 25 | #include <Library/UefiRuntimeServicesTableLib.h>\r | |
| 26 | #include <Library/MemoryAllocationLib.h>\r | |
| 27 | #include <Library/UefiDriverEntryPoint.h>\r | |
| 28 | #include <Library/UefiRuntimeLib.h>\r | |
| 29 | #include <Library/BaseMemoryLib.h>\r | |
| 30 | #include <Library/DebugLib.h>\r | |
| 31 | #include <Library/PcdLib.h>\r | |
| 32 | #include <Library/UefiLib.h>\r | |
| 33 | #include <Library/BaseLib.h>\r | |
| 34 | \r | |
| 35 | #include <Guid/EventGroup.h>\r | |
| d00ed85e | 36 | #include <Guid/VariableFormat.h>\r |
| 37 | #include <Guid/SmmVariableCommon.h>\r | |
| 8a2d4996 | 38 | \r |
| 39 | EFI_HANDLE mHandle = NULL; \r | |
| 40 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable = NULL;\r | |
| 41 | EFI_EVENT mVirtualAddressChangeEvent = NULL;\r | |
| 42 | EFI_SMM_COMMUNICATION_PROTOCOL *mSmmCommunication = NULL;\r | |
| 43 | UINT8 *mVariableBuffer = NULL;\r | |
| 44 | UINT8 *mVariableBufferPhysical = NULL;\r | |
| 8a2d4996 | 45 | UINTN mVariableBufferSize;\r |
| 5e5bb2a9 | 46 | UINTN mVariableBufferPayloadSize;\r |
| 6ed1ec59 | 47 | EFI_LOCK mVariableServicesLock;\r |
| ff843847 | 48 | EDKII_VARIABLE_LOCK_PROTOCOL mVariableLock;\r |
| 8a2d4996 | 49 | \r |
| 6ed1ec59 SZ |
50 | /**\r |
| 51 | Acquires lock only at boot time. Simply returns at runtime.\r | |
| 52 | \r | |
| 53 | This is a temperary function that will be removed when\r | |
| 54 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
| 55 | Runtimer driver in RT phase.\r | |
| 56 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
| 57 | at runtime.\r | |
| 58 | \r | |
| 59 | @param Lock A pointer to the lock to acquire.\r | |
| 60 | \r | |
| 61 | **/\r | |
| 62 | VOID\r | |
| 63 | AcquireLockOnlyAtBootTime (\r | |
| 64 | IN EFI_LOCK *Lock\r | |
| 65 | )\r | |
| 66 | {\r | |
| 67 | if (!EfiAtRuntime ()) {\r | |
| 68 | EfiAcquireLock (Lock);\r | |
| 69 | }\r | |
| 70 | }\r | |
| 71 | \r | |
| 72 | /**\r | |
| 73 | Releases lock only at boot time. Simply returns at runtime.\r | |
| 74 | \r | |
| 75 | This is a temperary function which will be removed when\r | |
| 76 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
| 77 | Runtimer driver in RT phase.\r | |
| 78 | It calls EfiReleaseLock() at boot time and simply returns\r | |
| 79 | at runtime.\r | |
| 80 | \r | |
| 81 | @param Lock A pointer to the lock to release.\r | |
| 82 | \r | |
| 83 | **/\r | |
| 84 | VOID\r | |
| 85 | ReleaseLockOnlyAtBootTime (\r | |
| 86 | IN EFI_LOCK *Lock\r | |
| 87 | )\r | |
| 88 | {\r | |
| 89 | if (!EfiAtRuntime ()) {\r | |
| 90 | EfiReleaseLock (Lock);\r | |
| 91 | }\r | |
| 92 | }\r | |
| 8a2d4996 | 93 | \r |
| 94 | /**\r | |
| 95 | Initialize the communicate buffer using DataSize and Function.\r | |
| 96 | \r | |
| 97 | The communicate size is: SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE +\r | |
| 98 | DataSize.\r | |
| 99 | \r | |
| 100 | @param[out] DataPtr Points to the data in the communicate buffer.\r | |
| 101 | @param[in] DataSize The data size to send to SMM.\r | |
| 102 | @param[in] Function The function number to initialize the communicate header.\r | |
| 103 | \r | |
| 104 | @retval EFI_INVALID_PARAMETER The data size is too big.\r | |
| 105 | @retval EFI_SUCCESS Find the specified variable.\r | |
| 106 | \r | |
| 107 | **/\r | |
| 108 | EFI_STATUS\r | |
| 109 | InitCommunicateBuffer (\r | |
| 110 | OUT VOID **DataPtr OPTIONAL,\r | |
| 111 | IN UINTN DataSize,\r | |
| 112 | IN UINTN Function\r | |
| 113 | )\r | |
| 114 | {\r | |
| 115 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader; \r | |
| 116 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader; \r | |
| 117 | \r | |
| 118 | \r | |
| 119 | if (DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE > mVariableBufferSize) {\r | |
| 120 | return EFI_INVALID_PARAMETER;\r | |
| 121 | }\r | |
| 122 | \r | |
| 123 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
| 124 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
| 125 | SmmCommunicateHeader->MessageLength = DataSize + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r | |
| 126 | \r | |
| 127 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r | |
| 128 | SmmVariableFunctionHeader->Function = Function;\r | |
| 129 | if (DataPtr != NULL) {\r | |
| 130 | *DataPtr = SmmVariableFunctionHeader->Data;\r | |
| 131 | }\r | |
| 132 | \r | |
| 133 | return EFI_SUCCESS;\r | |
| 134 | }\r | |
| 135 | \r | |
| 136 | \r | |
| 137 | /**\r | |
| 138 | Send the data in communicate buffer to SMM.\r | |
| 139 | \r | |
| 140 | @param[in] DataSize This size of the function header and the data.\r | |
| 141 | \r | |
| 32732a33 | 142 | @retval EFI_SUCCESS Success is returned from the functin in SMM.\r |
| 143 | @retval Others Failure is returned from the function in SMM. \r | |
| 8a2d4996 | 144 | \r |
| 145 | **/\r | |
| 146 | EFI_STATUS\r | |
| 147 | SendCommunicateBuffer (\r | |
| 148 | IN UINTN DataSize\r | |
| 149 | )\r | |
| 150 | {\r | |
| 151 | EFI_STATUS Status;\r | |
| 152 | UINTN CommSize;\r | |
| 153 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader; \r | |
| 154 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
| 155 | \r | |
| 156 | CommSize = DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r | |
| 157 | Status = mSmmCommunication->Communicate (mSmmCommunication, mVariableBufferPhysical, &CommSize);\r | |
| 158 | ASSERT_EFI_ERROR (Status);\r | |
| 159 | \r | |
| 160 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
| 161 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *)SmmCommunicateHeader->Data;\r | |
| 162 | return SmmVariableFunctionHeader->ReturnStatus;\r | |
| 163 | }\r | |
| 164 | \r | |
| ff843847 RN |
165 | /**\r |
| 166 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
| 167 | \r | |
| 168 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
| 169 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
| 170 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
| 171 | \r | |
| 172 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
| 173 | as pending to be read-only.\r | |
| 174 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
| 175 | Or VariableName is an empty string.\r | |
| 176 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
| 177 | already been signaled.\r | |
| 178 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
| 179 | **/\r | |
| 180 | EFI_STATUS\r | |
| 181 | EFIAPI\r | |
| 182 | VariableLockRequestToLock (\r | |
| 183 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
| 184 | IN CHAR16 *VariableName,\r | |
| 185 | IN EFI_GUID *VendorGuid\r | |
| 186 | )\r | |
| 187 | {\r | |
| 188 | EFI_STATUS Status;\r | |
| 189 | UINTN PayloadSize;\r | |
| 190 | SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *VariableToLock;\r | |
| 191 | \r | |
| 192 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
| 193 | return EFI_INVALID_PARAMETER;\r | |
| 194 | }\r | |
| 195 | \r | |
| 196 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r | |
| 197 | \r | |
| 198 | //\r | |
| 199 | // Init the communicate buffer. The buffer data size is:\r | |
| 200 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
| 201 | //\r | |
| 202 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE, Name) + StrSize (VariableName);\r | |
| 203 | Status = InitCommunicateBuffer ((VOID **) &VariableToLock, PayloadSize, SMM_VARIABLE_FUNCTION_LOCK_VARIABLE);\r | |
| 204 | if (EFI_ERROR (Status)) {\r | |
| 205 | goto Done;\r | |
| 206 | }\r | |
| 207 | ASSERT (VariableToLock != NULL);\r | |
| 208 | \r | |
| 209 | CopyGuid (&VariableToLock->Guid, VendorGuid);\r | |
| 210 | VariableToLock->NameSize = StrSize (VariableName);\r | |
| 211 | CopyMem (VariableToLock->Name, VariableName, VariableToLock->NameSize);\r | |
| 212 | \r | |
| 213 | //\r | |
| 214 | // Send data to SMM.\r | |
| 215 | //\r | |
| 216 | Status = SendCommunicateBuffer (PayloadSize);\r | |
| 217 | \r | |
| 218 | Done:\r | |
| 219 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
| 220 | return Status;\r | |
| 221 | }\r | |
| 8a2d4996 | 222 | \r |
| 223 | /**\r | |
| 224 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
| 225 | \r | |
| 226 | @param[in] VariableName Name of Variable to be found.\r | |
| 227 | @param[in] VendorGuid Variable vendor GUID.\r | |
| 228 | @param[out] Attributes Attribute value of the variable found.\r | |
| 229 | @param[in, out] DataSize Size of Data found. If size is less than the\r | |
| 230 | data, this value contains the required size.\r | |
| 231 | @param[out] Data Data pointer.\r | |
| 232 | \r | |
| 233 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 234 | @retval EFI_SUCCESS Find the specified variable.\r | |
| 235 | @retval EFI_NOT_FOUND Not found.\r | |
| 236 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
| 237 | \r | |
| 238 | **/\r | |
| 239 | EFI_STATUS\r | |
| 240 | EFIAPI\r | |
| 241 | RuntimeServiceGetVariable (\r | |
| 242 | IN CHAR16 *VariableName,\r | |
| 243 | IN EFI_GUID *VendorGuid,\r | |
| 244 | OUT UINT32 *Attributes OPTIONAL,\r | |
| 245 | IN OUT UINTN *DataSize,\r | |
| 246 | OUT VOID *Data\r | |
| 247 | )\r | |
| 248 | {\r | |
| 249 | EFI_STATUS Status;\r | |
| 250 | UINTN PayloadSize;\r | |
| 251 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
| 3a146f2a | 252 | UINTN TempDataSize;\r |
| 9d00d20e | 253 | UINTN VariableNameSize;\r |
| 8a2d4996 | 254 | \r |
| 255 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
| 256 | return EFI_INVALID_PARAMETER;\r | |
| 257 | }\r | |
| 258 | \r | |
| 259 | if ((*DataSize != 0) && (Data == NULL)) {\r | |
| 260 | return EFI_INVALID_PARAMETER;\r | |
| 261 | }\r | |
| 6ed1ec59 | 262 | \r |
| 3a146f2a | 263 | TempDataSize = *DataSize;\r |
| 9d00d20e | 264 | VariableNameSize = StrSize (VariableName);\r |
| 3a146f2a | 265 | \r |
| 266 | //\r | |
| 267 | // If VariableName exceeds SMM payload limit. Return failure\r | |
| 268 | //\r | |
| 5e5bb2a9 | 269 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) {\r |
| 3588bb35 SZ |
270 | return EFI_INVALID_PARAMETER;\r |
| 271 | }\r | |
| 272 | \r | |
| 6ed1ec59 SZ |
273 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
| 274 | \r | |
| 8a2d4996 | 275 | //\r |
| 276 | // Init the communicate buffer. The buffer data size is:\r | |
| 6ed1ec59 | 277 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r |
| 8a2d4996 | 278 | //\r |
| 5e5bb2a9 | 279 | if (TempDataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize) {\r |
| 3a146f2a | 280 | //\r |
| 281 | // If output data buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
| 282 | //\r | |
| 5e5bb2a9 | 283 | TempDataSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize;\r |
| 3a146f2a | 284 | }\r |
| 9d00d20e | 285 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + TempDataSize;\r |
| 3a146f2a | 286 | \r |
| 5c7fa429 | 287 | Status = InitCommunicateBuffer ((VOID **)&SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_GET_VARIABLE);\r |
| 8a2d4996 | 288 | if (EFI_ERROR (Status)) {\r |
| 6ed1ec59 | 289 | goto Done;\r |
| 8a2d4996 | 290 | }\r |
| 291 | ASSERT (SmmVariableHeader != NULL);\r | |
| 292 | \r | |
| 293 | CopyGuid (&SmmVariableHeader->Guid, VendorGuid);\r | |
| 3a146f2a | 294 | SmmVariableHeader->DataSize = TempDataSize;\r |
| 9d00d20e | 295 | SmmVariableHeader->NameSize = VariableNameSize;\r |
| 8a2d4996 | 296 | if (Attributes == NULL) {\r |
| 297 | SmmVariableHeader->Attributes = 0;\r | |
| 298 | } else {\r | |
| 299 | SmmVariableHeader->Attributes = *Attributes;\r | |
| 300 | }\r | |
| 301 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
| 302 | \r | |
| 303 | //\r | |
| 304 | // Send data to SMM.\r | |
| 305 | //\r | |
| 306 | Status = SendCommunicateBuffer (PayloadSize);\r | |
| 307 | \r | |
| 308 | //\r | |
| 309 | // Get data from SMM.\r | |
| 310 | //\r | |
| 3a146f2a | 311 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
| 312 | //\r | |
| 313 | // SMM CommBuffer DataSize can be a trimed value\r | |
| 314 | // Only update DataSize when needed\r | |
| 315 | //\r | |
| 316 | *DataSize = SmmVariableHeader->DataSize;\r | |
| 317 | }\r | |
| 8a2d4996 | 318 | if (Attributes != NULL) {\r |
| 319 | *Attributes = SmmVariableHeader->Attributes;\r | |
| 320 | }\r | |
| 321 | \r | |
| 322 | if (EFI_ERROR (Status)) {\r | |
| 6ed1ec59 | 323 | goto Done;\r |
| 8a2d4996 | 324 | }\r |
| 325 | \r | |
| 326 | CopyMem (Data, (UINT8 *)SmmVariableHeader->Name + SmmVariableHeader->NameSize, SmmVariableHeader->DataSize);\r | |
| 327 | \r | |
| 6ed1ec59 SZ |
328 | Done:\r |
| 329 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
| 8a2d4996 | 330 | return Status;\r |
| 331 | }\r | |
| 332 | \r | |
| 333 | \r | |
| 334 | /**\r | |
| 335 | This code Finds the Next available variable.\r | |
| 336 | \r | |
| 337 | @param[in, out] VariableNameSize Size of the variable name.\r | |
| 338 | @param[in, out] VariableName Pointer to variable name.\r | |
| 339 | @param[in, out] VendorGuid Variable Vendor Guid.\r | |
| 340 | \r | |
| 341 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 342 | @retval EFI_SUCCESS Find the specified variable.\r | |
| 343 | @retval EFI_NOT_FOUND Not found.\r | |
| 344 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
| 345 | \r | |
| 346 | **/\r | |
| 347 | EFI_STATUS\r | |
| 348 | EFIAPI\r | |
| 349 | RuntimeServiceGetNextVariableName (\r | |
| 350 | IN OUT UINTN *VariableNameSize,\r | |
| 351 | IN OUT CHAR16 *VariableName,\r | |
| 352 | IN OUT EFI_GUID *VendorGuid\r | |
| 353 | )\r | |
| 354 | {\r | |
| 355 | EFI_STATUS Status;\r | |
| 356 | UINTN PayloadSize;\r | |
| 357 | SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *SmmGetNextVariableName;\r | |
| 9d00d20e SZ |
358 | UINTN OutVariableNameSize;\r |
| 359 | UINTN InVariableNameSize;\r | |
| 8a2d4996 | 360 | \r |
| 361 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
| 362 | return EFI_INVALID_PARAMETER;\r | |
| 363 | }\r | |
| 6ed1ec59 | 364 | \r |
| 9d00d20e SZ |
365 | OutVariableNameSize = *VariableNameSize;\r |
| 366 | InVariableNameSize = StrSize (VariableName);\r | |
| 0c55190f | 367 | \r |
| 368 | //\r | |
| 369 | // If input string exceeds SMM payload limit. Return failure\r | |
| 370 | //\r | |
| 5e5bb2a9 | 371 | if (InVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
| 3588bb35 SZ |
372 | return EFI_INVALID_PARAMETER;\r |
| 373 | }\r | |
| 374 | \r | |
| 6ed1ec59 SZ |
375 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
| 376 | \r | |
| 8a2d4996 | 377 | //\r |
| 378 | // Init the communicate buffer. The buffer data size is:\r | |
| 379 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
| 380 | //\r | |
| 5e5bb2a9 | 381 | if (OutVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
| 0c55190f | 382 | //\r |
| 383 | // If output buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
| 384 | //\r | |
| 5e5bb2a9 | 385 | OutVariableNameSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name);\r |
| 0c55190f | 386 | }\r |
| 387 | //\r | |
| 388 | // Payload should be Guid + NameSize + MAX of Input & Output buffer\r | |
| 389 | //\r | |
| 9d00d20e | 390 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name) + MAX (OutVariableNameSize, InVariableNameSize);\r |
| 0c55190f | 391 | \r |
| 392 | \r | |
| 5c7fa429 | 393 | Status = InitCommunicateBuffer ((VOID **)&SmmGetNextVariableName, PayloadSize, SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME);\r |
| 8a2d4996 | 394 | if (EFI_ERROR (Status)) {\r |
| 6ed1ec59 | 395 | goto Done;\r |
| 8a2d4996 | 396 | }\r |
| 397 | ASSERT (SmmGetNextVariableName != NULL);\r | |
| 398 | \r | |
| 0c55190f | 399 | //\r |
| 400 | // SMM comm buffer->NameSize is buffer size for return string\r | |
| 401 | //\r | |
| 9d00d20e | 402 | SmmGetNextVariableName->NameSize = OutVariableNameSize;\r |
| 0c55190f | 403 | \r |
| 8a2d4996 | 404 | CopyGuid (&SmmGetNextVariableName->Guid, VendorGuid);\r |
| 0c55190f | 405 | //\r |
| 406 | // Copy whole string\r | |
| 407 | //\r | |
| 9d00d20e SZ |
408 | CopyMem (SmmGetNextVariableName->Name, VariableName, InVariableNameSize);\r |
| 409 | if (OutVariableNameSize > InVariableNameSize) {\r | |
| 410 | ZeroMem ((UINT8 *) SmmGetNextVariableName->Name + InVariableNameSize, OutVariableNameSize - InVariableNameSize);\r | |
| 411 | }\r | |
| 8a2d4996 | 412 | \r |
| 413 | //\r | |
| 414 | // Send data to SMM\r | |
| 415 | //\r | |
| 416 | Status = SendCommunicateBuffer (PayloadSize);\r | |
| 417 | \r | |
| 418 | //\r | |
| 419 | // Get data from SMM.\r | |
| 420 | //\r | |
| 9d00d20e SZ |
421 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
| 422 | //\r | |
| 423 | // SMM CommBuffer NameSize can be a trimed value\r | |
| 424 | // Only update VariableNameSize when needed\r | |
| 425 | //\r | |
| 426 | *VariableNameSize = SmmGetNextVariableName->NameSize;\r | |
| 427 | }\r | |
| 8a2d4996 | 428 | if (EFI_ERROR (Status)) {\r |
| 6ed1ec59 | 429 | goto Done;\r |
| 8a2d4996 | 430 | }\r |
| 431 | \r | |
| 432 | CopyGuid (VendorGuid, &SmmGetNextVariableName->Guid);\r | |
| 433 | CopyMem (VariableName, SmmGetNextVariableName->Name, SmmGetNextVariableName->NameSize); \r | |
| 434 | \r | |
| 6ed1ec59 SZ |
435 | Done:\r |
| 436 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
| 8a2d4996 | 437 | return Status;\r |
| 438 | }\r | |
| 439 | \r | |
| 440 | /**\r | |
| 441 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
| 442 | \r | |
| 443 | @param[in] VariableName Name of Variable to be found.\r | |
| 444 | @param[in] VendorGuid Variable vendor GUID.\r | |
| 445 | @param[in] Attributes Attribute value of the variable found\r | |
| 446 | @param[in] DataSize Size of Data found. If size is less than the\r | |
| 447 | data, this value contains the required size.\r | |
| 448 | @param[in] Data Data pointer.\r | |
| 449 | \r | |
| 450 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
| 451 | @retval EFI_SUCCESS Set successfully.\r | |
| 452 | @retval EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
| 453 | @retval EFI_NOT_FOUND Not found.\r | |
| 454 | @retval EFI_WRITE_PROTECTED Variable is read-only.\r | |
| 455 | \r | |
| 456 | **/\r | |
| 457 | EFI_STATUS\r | |
| 458 | EFIAPI\r | |
| 459 | RuntimeServiceSetVariable (\r | |
| 460 | IN CHAR16 *VariableName,\r | |
| 461 | IN EFI_GUID *VendorGuid,\r | |
| 462 | IN UINT32 Attributes,\r | |
| 463 | IN UINTN DataSize,\r | |
| 464 | IN VOID *Data\r | |
| 465 | )\r | |
| 466 | {\r | |
| 467 | EFI_STATUS Status;\r | |
| 468 | UINTN PayloadSize; \r | |
| 469 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
| 9d00d20e | 470 | UINTN VariableNameSize;\r |
| 8a2d4996 | 471 | \r |
| 472 | //\r | |
| 473 | // Check input parameters.\r | |
| 474 | //\r | |
| 475 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
| 476 | return EFI_INVALID_PARAMETER;\r | |
| 477 | } \r | |
| 478 | \r | |
| 479 | if (DataSize != 0 && Data == NULL) {\r | |
| 480 | return EFI_INVALID_PARAMETER;\r | |
| 481 | }\r | |
| 6ed1ec59 | 482 | \r |
| 9d00d20e | 483 | VariableNameSize = StrSize (VariableName);\r |
| 3588bb35 | 484 | \r |
| 5e5bb2a9 SZ |
485 | //\r |
| 486 | // If VariableName or DataSize exceeds SMM payload limit. Return failure\r | |
| 487 | //\r | |
| 488 | if ((VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) ||\r | |
| 489 | (DataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize)){\r | |
| 56251c66 | 490 | return EFI_INVALID_PARAMETER;\r |
| 491 | }\r | |
| 492 | \r | |
| 6ed1ec59 SZ |
493 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
| 494 | \r | |
| 8a2d4996 | 495 | //\r |
| 496 | // Init the communicate buffer. The buffer data size is:\r | |
| 497 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
| 498 | //\r | |
| 9d00d20e | 499 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + DataSize;\r |
| 5c7fa429 | 500 | Status = InitCommunicateBuffer ((VOID **)&SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_SET_VARIABLE);\r |
| 8a2d4996 | 501 | if (EFI_ERROR (Status)) {\r |
| 6ed1ec59 | 502 | goto Done;\r |
| 8a2d4996 | 503 | }\r |
| 504 | ASSERT (SmmVariableHeader != NULL);\r | |
| 505 | \r | |
| 506 | CopyGuid ((EFI_GUID *) &SmmVariableHeader->Guid, VendorGuid);\r | |
| 507 | SmmVariableHeader->DataSize = DataSize;\r | |
| 9d00d20e | 508 | SmmVariableHeader->NameSize = VariableNameSize;\r |
| 8a2d4996 | 509 | SmmVariableHeader->Attributes = Attributes;\r |
| 510 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
| 511 | CopyMem ((UINT8 *) SmmVariableHeader->Name + SmmVariableHeader->NameSize, Data, DataSize);\r | |
| 512 | \r | |
| 513 | //\r | |
| 514 | // Send data to SMM.\r | |
| 515 | //\r | |
| 516 | Status = SendCommunicateBuffer (PayloadSize);\r | |
| 6ed1ec59 SZ |
517 | \r |
| 518 | Done:\r | |
| 519 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
| 8a2d4996 | 520 | return Status;\r |
| 521 | }\r | |
| 522 | \r | |
| 523 | \r | |
| 524 | /**\r | |
| 525 | This code returns information about the EFI variables.\r | |
| 526 | \r | |
| 527 | @param[in] Attributes Attributes bitmask to specify the type of variables\r | |
| 528 | on which to return information.\r | |
| 529 | @param[out] MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
| 530 | for the EFI variables associated with the attributes specified.\r | |
| 531 | @param[out] RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
| 532 | for EFI variables associated with the attributes specified.\r | |
| 533 | @param[out] MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
| 534 | associated with the attributes specified.\r | |
| 535 | \r | |
| 536 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
| 537 | @retval EFI_SUCCESS Query successfully.\r | |
| 538 | @retval EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
| 539 | \r | |
| 540 | **/\r | |
| 541 | EFI_STATUS\r | |
| 542 | EFIAPI\r | |
| 543 | RuntimeServiceQueryVariableInfo (\r | |
| 544 | IN UINT32 Attributes,\r | |
| 545 | OUT UINT64 *MaximumVariableStorageSize,\r | |
| 546 | OUT UINT64 *RemainingVariableStorageSize,\r | |
| 547 | OUT UINT64 *MaximumVariableSize\r | |
| 548 | )\r | |
| 549 | {\r | |
| 550 | EFI_STATUS Status;\r | |
| 551 | UINTN PayloadSize;\r | |
| 552 | SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *SmmQueryVariableInfo;\r | |
| 553 | \r | |
| 554 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r | |
| 555 | return EFI_INVALID_PARAMETER;\r | |
| 556 | }\r | |
| 6ed1ec59 SZ |
557 | \r |
| 558 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r | |
| 559 | \r | |
| 8a2d4996 | 560 | //\r |
| 561 | // Init the communicate buffer. The buffer data size is:\r | |
| 562 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize;\r | |
| 563 | //\r | |
| d00ed85e | 564 | PayloadSize = sizeof (SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO);\r |
| 5c7fa429 | 565 | Status = InitCommunicateBuffer ((VOID **)&SmmQueryVariableInfo, PayloadSize, SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO);\r |
| 8a2d4996 | 566 | if (EFI_ERROR (Status)) {\r |
| 6ed1ec59 | 567 | goto Done;\r |
| 8a2d4996 | 568 | }\r |
| 569 | ASSERT (SmmQueryVariableInfo != NULL);\r | |
| 570 | \r | |
| 571 | SmmQueryVariableInfo->Attributes = Attributes;\r | |
| 572 | \r | |
| 573 | //\r | |
| 574 | // Send data to SMM.\r | |
| 575 | //\r | |
| 576 | Status = SendCommunicateBuffer (PayloadSize);\r | |
| 577 | if (EFI_ERROR (Status)) {\r | |
| 6ed1ec59 | 578 | goto Done;\r |
| 8a2d4996 | 579 | }\r |
| 580 | \r | |
| 581 | //\r | |
| 582 | // Get data from SMM.\r | |
| 583 | //\r | |
| 584 | *MaximumVariableSize = SmmQueryVariableInfo->MaximumVariableSize;\r | |
| 585 | *MaximumVariableStorageSize = SmmQueryVariableInfo->MaximumVariableStorageSize;\r | |
| 586 | *RemainingVariableStorageSize = SmmQueryVariableInfo->RemainingVariableStorageSize; \r | |
| 6ed1ec59 SZ |
587 | \r |
| 588 | Done:\r | |
| 589 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
| aab9212f | 590 | return Status;\r |
| 8a2d4996 | 591 | }\r |
| 592 | \r | |
| 593 | \r | |
| 594 | /**\r | |
| 595 | Exit Boot Services Event notification handler.\r | |
| 596 | \r | |
| 597 | Notify SMM variable driver about the event.\r | |
| 598 | \r | |
| 599 | @param[in] Event Event whose notification function is being invoked.\r | |
| 600 | @param[in] Context Pointer to the notification function's context.\r | |
| 601 | \r | |
| 602 | **/\r | |
| 603 | VOID\r | |
| 604 | EFIAPI\r | |
| 605 | OnExitBootServices (\r | |
| 606 | IN EFI_EVENT Event,\r | |
| 607 | IN VOID *Context\r | |
| 608 | )\r | |
| 609 | {\r | |
| 610 | //\r | |
| 611 | // Init the communicate buffer. The buffer data size is:\r | |
| 612 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
| 613 | //\r | |
| 614 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE); \r | |
| 615 | \r | |
| 616 | //\r | |
| 617 | // Send data to SMM.\r | |
| 618 | //\r | |
| 619 | SendCommunicateBuffer (0);\r | |
| 620 | }\r | |
| 621 | \r | |
| 622 | \r | |
| 623 | /**\r | |
| 624 | On Ready To Boot Services Event notification handler.\r | |
| 625 | \r | |
| 626 | Notify SMM variable driver about the event.\r | |
| 627 | \r | |
| 628 | @param[in] Event Event whose notification function is being invoked\r | |
| 629 | @param[in] Context Pointer to the notification function's context\r | |
| 630 | \r | |
| 631 | **/\r | |
| 632 | VOID\r | |
| 633 | EFIAPI\r | |
| 634 | OnReadyToBoot (\r | |
| 635 | IN EFI_EVENT Event,\r | |
| 636 | IN VOID *Context\r | |
| 637 | )\r | |
| 638 | {\r | |
| 639 | //\r | |
| 640 | // Init the communicate buffer. The buffer data size is:\r | |
| 641 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
| 642 | //\r | |
| 643 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_READY_TO_BOOT);\r | |
| 644 | \r | |
| 645 | //\r | |
| 646 | // Send data to SMM.\r | |
| 647 | //\r | |
| 648 | SendCommunicateBuffer (0);\r | |
| 649 | }\r | |
| 650 | \r | |
| 651 | \r | |
| 652 | /**\r | |
| 653 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
| 654 | \r | |
| 655 | This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r | |
| 656 | It convers pointer to new virtual address.\r | |
| 657 | \r | |
| 658 | @param[in] Event Event whose notification function is being invoked.\r | |
| 659 | @param[in] Context Pointer to the notification function's context.\r | |
| 660 | \r | |
| 661 | **/\r | |
| 662 | VOID\r | |
| 663 | EFIAPI\r | |
| 664 | VariableAddressChangeEvent (\r | |
| 665 | IN EFI_EVENT Event,\r | |
| 666 | IN VOID *Context\r | |
| 667 | )\r | |
| 668 | {\r | |
| 669 | EfiConvertPointer (0x0, (VOID **) &mVariableBuffer);\r | |
| 670 | EfiConvertPointer (0x0, (VOID **) &mSmmCommunication);\r | |
| 671 | }\r | |
| 672 | \r | |
| 673 | \r | |
| 674 | /**\r | |
| 675 | Initialize variable service and install Variable Architectural protocol.\r | |
| 676 | \r | |
| 677 | @param[in] Event Event whose notification function is being invoked.\r | |
| 678 | @param[in] Context Pointer to the notification function's context.\r | |
| 679 | \r | |
| 680 | **/\r | |
| 681 | VOID\r | |
| 682 | EFIAPI\r | |
| 683 | SmmVariableReady (\r | |
| 684 | IN EFI_EVENT Event,\r | |
| 685 | IN VOID *Context\r | |
| 686 | )\r | |
| 687 | {\r | |
| 688 | EFI_STATUS Status;\r | |
| 689 | \r | |
| 690 | Status = gBS->LocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID **)&mSmmVariable);\r | |
| 691 | if (EFI_ERROR (Status)) {\r | |
| 692 | return;\r | |
| 693 | }\r | |
| 694 | \r | |
| 695 | Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &mSmmCommunication);\r | |
| 696 | ASSERT_EFI_ERROR (Status);\r | |
| 697 | \r | |
| 698 | //\r | |
| 5e5bb2a9 | 699 | // Allocate memory for variable communicate buffer.\r |
| 8a2d4996 | 700 | //\r |
| 5e5bb2a9 SZ |
701 | mVariableBufferPayloadSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)) +\r |
| 702 | OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - sizeof (VARIABLE_HEADER);\r | |
| 703 | mVariableBufferSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + mVariableBufferPayloadSize;\r | |
| 8a2d4996 | 704 | mVariableBuffer = AllocateRuntimePool (mVariableBufferSize);\r |
| 705 | ASSERT (mVariableBuffer != NULL);\r | |
| 706 | \r | |
| 707 | //\r | |
| 708 | // Save the buffer physical address used for SMM conmunication.\r | |
| 709 | //\r | |
| 710 | mVariableBufferPhysical = mVariableBuffer;\r | |
| 711 | \r | |
| 712 | gRT->GetVariable = RuntimeServiceGetVariable;\r | |
| 713 | gRT->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
| 714 | gRT->SetVariable = RuntimeServiceSetVariable;\r | |
| 715 | gRT->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
| 716 | \r | |
| 717 | //\r | |
| 718 | // Install the Variable Architectural Protocol on a new handle.\r | |
| 719 | //\r | |
| 720 | Status = gBS->InstallProtocolInterface (\r | |
| 721 | &mHandle,\r | |
| 722 | &gEfiVariableArchProtocolGuid, \r | |
| 723 | EFI_NATIVE_INTERFACE,\r | |
| 724 | NULL\r | |
| 725 | );\r | |
| 726 | ASSERT_EFI_ERROR (Status);\r | |
| 727 | }\r | |
| 728 | \r | |
| 729 | \r | |
| 730 | /**\r | |
| 731 | SMM Non-Volatile variable write service is ready notify event handler.\r | |
| 732 | \r | |
| 733 | @param[in] Event Event whose notification function is being invoked.\r | |
| 734 | @param[in] Context Pointer to the notification function's context.\r | |
| 735 | \r | |
| 736 | **/\r | |
| 737 | VOID\r | |
| 738 | EFIAPI\r | |
| 739 | SmmVariableWriteReady (\r | |
| 740 | IN EFI_EVENT Event,\r | |
| 741 | IN VOID *Context\r | |
| 742 | )\r | |
| 743 | {\r | |
| 744 | EFI_STATUS Status;\r | |
| 745 | VOID *ProtocolOps;\r | |
| 746 | \r | |
| 747 | //\r | |
| 748 | // Check whether the protocol is installed or not.\r | |
| 749 | //\r | |
| d00ed85e | 750 | Status = gBS->LocateProtocol (&gSmmVariableWriteGuid, NULL, (VOID **) &ProtocolOps);\r |
| 8a2d4996 | 751 | if (EFI_ERROR (Status)) {\r |
| 752 | return;\r | |
| 753 | }\r | |
| 754 | \r | |
| 755 | Status = gBS->InstallProtocolInterface (\r | |
| 756 | &mHandle,\r | |
| 757 | &gEfiVariableWriteArchProtocolGuid, \r | |
| 758 | EFI_NATIVE_INTERFACE,\r | |
| 759 | NULL\r | |
| 760 | );\r | |
| 761 | ASSERT_EFI_ERROR (Status); \r | |
| 762 | }\r | |
| 763 | \r | |
| 764 | \r | |
| 765 | /**\r | |
| 766 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
| 767 | runtime services in the EFI System Table and installs arch protocols \r | |
| d00ed85e | 768 | for variable read and write services being available. It also registers\r |
| 8a2d4996 | 769 | a notification function for an EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r |
| 770 | \r | |
| 771 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
| 772 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
| 773 | \r | |
| 774 | @retval EFI_SUCCESS Variable service successfully initialized.\r | |
| 775 | \r | |
| 776 | **/\r | |
| 777 | EFI_STATUS\r | |
| 778 | EFIAPI\r | |
| 779 | VariableSmmRuntimeInitialize (\r | |
| 780 | IN EFI_HANDLE ImageHandle,\r | |
| 781 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 782 | )\r | |
| 783 | {\r | |
| ff843847 | 784 | EFI_STATUS Status;\r |
| 8a2d4996 | 785 | VOID *SmmVariableRegistration;\r |
| 786 | VOID *SmmVariableWriteRegistration;\r | |
| 787 | EFI_EVENT OnReadyToBootEvent;\r | |
| 788 | EFI_EVENT ExitBootServiceEvent;\r | |
| 6ed1ec59 SZ |
789 | \r |
| 790 | EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);\r | |
| 791 | \r | |
| ff843847 RN |
792 | mVariableLock.RequestToLock = VariableLockRequestToLock;\r |
| 793 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
| 794 | &mHandle,\r | |
| 795 | &gEdkiiVariableLockProtocolGuid,\r | |
| 796 | &mVariableLock,\r | |
| 797 | NULL\r | |
| 798 | );\r | |
| 799 | ASSERT_EFI_ERROR (Status);\r | |
| 800 | \r | |
| 8a2d4996 | 801 | //\r |
| 802 | // Smm variable service is ready\r | |
| 803 | //\r | |
| 804 | EfiCreateProtocolNotifyEvent (\r | |
| 805 | &gEfiSmmVariableProtocolGuid, \r | |
| 806 | TPL_CALLBACK, \r | |
| 807 | SmmVariableReady, \r | |
| 808 | NULL, \r | |
| 809 | &SmmVariableRegistration\r | |
| 810 | );\r | |
| 811 | \r | |
| 812 | //\r | |
| 813 | // Smm Non-Volatile variable write service is ready\r | |
| 814 | //\r | |
| 815 | EfiCreateProtocolNotifyEvent (\r | |
| d00ed85e | 816 | &gSmmVariableWriteGuid, \r |
| 8a2d4996 | 817 | TPL_CALLBACK, \r |
| 818 | SmmVariableWriteReady, \r | |
| 819 | NULL, \r | |
| 820 | &SmmVariableWriteRegistration\r | |
| 821 | );\r | |
| 822 | \r | |
| 823 | //\r | |
| 824 | // Register the event to reclaim variable for OS usage.\r | |
| 825 | //\r | |
| 826 | EfiCreateEventReadyToBootEx (\r | |
| 827 | TPL_NOTIFY, \r | |
| 828 | OnReadyToBoot, \r | |
| 829 | NULL, \r | |
| 830 | &OnReadyToBootEvent\r | |
| 831 | ); \r | |
| 832 | \r | |
| 833 | //\r | |
| 834 | // Register the event to inform SMM variable that it is at runtime.\r | |
| 835 | //\r | |
| 836 | gBS->CreateEventEx (\r | |
| 837 | EVT_NOTIFY_SIGNAL,\r | |
| 838 | TPL_NOTIFY,\r | |
| 839 | OnExitBootServices,\r | |
| 840 | NULL,\r | |
| 841 | &gEfiEventExitBootServicesGuid,\r | |
| 842 | &ExitBootServiceEvent\r | |
| 843 | ); \r | |
| 844 | \r | |
| 845 | //\r | |
| 846 | // Register the event to convert the pointer for runtime.\r | |
| 847 | //\r | |
| 848 | gBS->CreateEventEx (\r | |
| 849 | EVT_NOTIFY_SIGNAL,\r | |
| 850 | TPL_NOTIFY,\r | |
| 851 | VariableAddressChangeEvent,\r | |
| 852 | NULL,\r | |
| 853 | &gEfiEventVirtualAddressChangeGuid,\r | |
| 854 | &mVirtualAddressChangeEvent\r | |
| 855 | );\r | |
| 856 | \r | |
| 857 | return EFI_SUCCESS;\r | |
| 858 | }\r | |
| 859 | \r |