1 /** @file 2 Sample platform variable cleanup library implementation. 3 4 Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include "PlatVarCleanup.h" 16 17 VAR_ERROR_FLAG mLastVarErrorFlag = VAR_ERROR_FLAG_NO_ERROR; 18 EDKII_VAR_CHECK_PROTOCOL *mVarCheck = NULL; 19 20 /// 21 /// The flag to indicate whether the platform has left the DXE phase of execution. 22 /// 23 BOOLEAN mEndOfDxe = FALSE; 24 25 LIST_ENTRY mUserVariableList = INITIALIZE_LIST_HEAD_VARIABLE (mUserVariableList); 26 UINT16 mUserVariableCount = 0; 27 UINT16 mMarkedUserVariableCount = 0; 28 29 EFI_GUID mVariableCleanupHiiGuid = VARIABLE_CLEANUP_HII_GUID; 30 CHAR16 mVarStoreName[] = L"VariableCleanup"; 31 32 HII_VENDOR_DEVICE_PATH mVarCleanupHiiVendorDevicePath = { 33 { 34 { 35 HARDWARE_DEVICE_PATH, 36 HW_VENDOR_DP, 37 { 38 (UINT8) (sizeof (VENDOR_DEVICE_PATH)), 39 (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8) 40 } 41 }, 42 VARIABLE_CLEANUP_HII_GUID 43 }, 44 { 45 END_DEVICE_PATH_TYPE, 46 END_ENTIRE_DEVICE_PATH_SUBTYPE, 47 { 48 (UINT8) (sizeof (EFI_DEVICE_PATH_PROTOCOL)), 49 (UINT8) ((sizeof (EFI_DEVICE_PATH_PROTOCOL)) >> 8) 50 } 51 } 52 }; 53 54 /** 55 Internal get variable error flag. 56 57 @return Variable error flag. 58 59 **/ 60 VAR_ERROR_FLAG 61 InternalGetVarErrorFlag ( 62 VOID 63 ) 64 { 65 EFI_STATUS Status; 66 UINTN Size; 67 VAR_ERROR_FLAG ErrorFlag; 68 69 Size = sizeof (ErrorFlag); 70 Status = gRT->GetVariable ( 71 VAR_ERROR_FLAG_NAME, 72 &gEdkiiVarErrorFlagGuid, 73 NULL, 74 &Size, 75 &ErrorFlag 76 ); 77 if (EFI_ERROR (Status)) { 78 DEBUG ((EFI_D_INFO, "%s - not found\n", VAR_ERROR_FLAG_NAME)); 79 return VAR_ERROR_FLAG_NO_ERROR; 80 } 81 return ErrorFlag; 82 } 83 84 /** 85 Is user variable? 86 87 @param[in] Name Pointer to variable name. 88 @param[in] Guid Pointer to vendor guid. 89 90 @retval TRUE User variable. 91 @retval FALSE System variable. 92 93 **/ 94 BOOLEAN 95 IsUserVariable ( 96 IN CHAR16 *Name, 97 IN EFI_GUID *Guid 98 ) 99 { 100 EFI_STATUS Status; 101 VAR_CHECK_VARIABLE_PROPERTY Property; 102 103 if (mVarCheck == NULL) { 104 gBS->LocateProtocol ( 105 &gEdkiiVarCheckProtocolGuid, 106 NULL, 107 (VOID **) &mVarCheck 108 ); 109 } 110 ASSERT (mVarCheck != NULL); 111 112 ZeroMem (&Property, sizeof (Property)); 113 Status = mVarCheck->VariablePropertyGet ( 114 Name, 115 Guid, 116 &Property 117 ); 118 if (EFI_ERROR (Status)) { 119 // 120 // No property, it is user variable. 121 // 122 DEBUG ((EFI_D_INFO, "PlatformVarCleanup - User variable: %g:%s\n", Guid, Name)); 123 return TRUE; 124 } 125 126 // DEBUG ((EFI_D_INFO, "PlatformVarCleanup - Variable Property: %g:%s\n", Guid, Name)); 127 // DEBUG ((EFI_D_INFO, " Revision - 0x%04x\n", Property.Revision)); 128 // DEBUG ((EFI_D_INFO, " Property - 0x%04x\n", Property.Property)); 129 // DEBUG ((EFI_D_INFO, " Attribute - 0x%08x\n", Property.Attributes)); 130 // DEBUG ((EFI_D_INFO, " MinSize - 0x%x\n", Property.MinSize)); 131 // DEBUG ((EFI_D_INFO, " MaxSize - 0x%x\n", Property.MaxSize)); 132 133 return FALSE; 134 } 135 136 /** 137 Find user variable node by variable GUID. 138 139 @param[in] Guid Pointer to vendor guid. 140 141 @return Pointer to user variable node. 142 143 **/ 144 USER_VARIABLE_NODE * 145 FindUserVariableNodeByGuid ( 146 IN EFI_GUID *Guid 147 ) 148 { 149 USER_VARIABLE_NODE *UserVariableNode; 150 LIST_ENTRY *Link; 151 152 for (Link = mUserVariableList.ForwardLink 153 ;Link != &mUserVariableList 154 ;Link = Link->ForwardLink) { 155 UserVariableNode = USER_VARIABLE_FROM_LINK (Link); 156 157 if (CompareGuid (Guid, &UserVariableNode->Guid)) { 158 // 159 // Found it. 160 // 161 return UserVariableNode; 162 } 163 } 164 165 // 166 // Create new one if not found. 167 // 168 UserVariableNode = AllocateZeroPool (sizeof (*UserVariableNode)); 169 ASSERT (UserVariableNode != NULL); 170 UserVariableNode->Signature = USER_VARIABLE_NODE_SIGNATURE; 171 CopyGuid (&UserVariableNode->Guid, Guid); 172 // 173 // (36 chars of "########-####-####-####-############" + 1 space + 1 terminator) * sizeof (CHAR16). 174 // 175 UserVariableNode->PromptString = AllocatePool ((36 + 2) * sizeof (CHAR16)); 176 ASSERT (UserVariableNode->PromptString != NULL); 177 UnicodeSPrint (UserVariableNode->PromptString, (36 + 2) * sizeof (CHAR16), L" %g", &UserVariableNode->Guid); 178 InitializeListHead (&UserVariableNode->NameLink); 179 InsertTailList (&mUserVariableList, &UserVariableNode->Link); 180 return UserVariableNode; 181 } 182 183 /** 184 Create user variable node. 185 186 **/ 187 VOID 188 CreateUserVariableNode ( 189 VOID 190 ) 191 { 192 EFI_STATUS Status; 193 EFI_STATUS GetVariableStatus; 194 CHAR16 *VarName; 195 UINTN MaxVarNameSize; 196 UINTN VarNameSize; 197 UINTN MaxDataSize; 198 UINTN DataSize; 199 VOID *Data; 200 UINT32 Attributes; 201 EFI_GUID Guid; 202 USER_VARIABLE_NODE *UserVariableNode; 203 USER_VARIABLE_NAME_NODE *UserVariableNameNode; 204 UINT16 Index; 205 UINTN StringSize; 206 207 // 208 // Initialize 128 * sizeof (CHAR16) variable name size. 209 // 210 MaxVarNameSize = 128 * sizeof (CHAR16); 211 VarName = AllocateZeroPool (MaxVarNameSize); 212 ASSERT (VarName != NULL); 213 214 // 215 // Initialize 0x1000 variable data size. 216 // 217 MaxDataSize = 0x1000; 218 Data = AllocateZeroPool (MaxDataSize); 219 ASSERT (Data != NULL); 220 221 Index = 0; 222 do { 223 VarNameSize = MaxVarNameSize; 224 Status = gRT->GetNextVariableName (&VarNameSize, VarName, &Guid); 225 if (Status == EFI_BUFFER_TOO_SMALL) { 226 VarName = ReallocatePool (MaxVarNameSize, VarNameSize, VarName); 227 ASSERT (VarName != NULL); 228 MaxVarNameSize = VarNameSize; 229 Status = gRT->GetNextVariableName (&VarNameSize, VarName, &Guid); 230 } 231 232 if (!EFI_ERROR (Status)) { 233 if (IsUserVariable (VarName, &Guid)) { 234 DataSize = MaxDataSize; 235 GetVariableStatus = gRT->GetVariable (VarName, &Guid, &Attributes, &DataSize, Data); 236 if (GetVariableStatus == EFI_BUFFER_TOO_SMALL) { 237 Data = ReallocatePool (MaxDataSize, DataSize, Data); 238 ASSERT (Data != NULL); 239 MaxDataSize = DataSize; 240 GetVariableStatus = gRT->GetVariable (VarName, &Guid, &Attributes, &DataSize, Data); 241 } 242 ASSERT_EFI_ERROR (GetVariableStatus); 243 244 if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) { 245 UserVariableNode = FindUserVariableNodeByGuid (&Guid); 246 ASSERT (UserVariableNode != NULL); 247 248 // 249 // Different variables that have same variable GUID share same user variable node. 250 // 251 UserVariableNameNode = AllocateZeroPool (sizeof (*UserVariableNameNode)); 252 ASSERT (UserVariableNameNode != NULL); 253 UserVariableNameNode->Signature = USER_VARIABLE_NAME_NODE_SIGNATURE; 254 UserVariableNameNode->Name = AllocateCopyPool (VarNameSize, VarName); 255 UserVariableNameNode->Attributes = Attributes; 256 UserVariableNameNode->DataSize = DataSize; 257 UserVariableNameNode->Index = Index; 258 UserVariableNameNode->QuestionId = (EFI_QUESTION_ID) (USER_VARIABLE_QUESTION_ID + Index); 259 // 260 // 2 space * sizeof (CHAR16) + StrSize. 261 // 262 StringSize = 2 * sizeof (CHAR16) + StrSize (UserVariableNameNode->Name); 263 UserVariableNameNode->PromptString = AllocatePool (StringSize); 264 ASSERT (UserVariableNameNode->PromptString != NULL); 265 UnicodeSPrint (UserVariableNameNode->PromptString, StringSize, L" %s", UserVariableNameNode->Name); 266 // 267 // (33 chars of "Attribtues = 0x and DataSize = 0x" + 1 terminator + (sizeof (UINT32) + sizeof (UINTN)) * 2) * sizeof (CHAR16). 268 // 269 StringSize = (33 + 1 + (sizeof (UINT32) + sizeof (UINTN)) * 2) * sizeof (CHAR16); 270 UserVariableNameNode->HelpString = AllocatePool (StringSize); 271 ASSERT (UserVariableNameNode->HelpString != NULL); 272 UnicodeSPrint (UserVariableNameNode->HelpString, StringSize, L"Attribtues = 0x%08x and DataSize = 0x%x", UserVariableNameNode->Attributes, UserVariableNameNode->DataSize); 273 UserVariableNameNode->Deleted = FALSE; 274 InsertTailList (&UserVariableNode->NameLink, &UserVariableNameNode->Link); 275 Index++; 276 } 277 } 278 } 279 } while (Status != EFI_NOT_FOUND); 280 281 mUserVariableCount = Index; 282 ASSERT (mUserVariableCount <= MAX_USER_VARIABLE_COUNT); 283 DEBUG ((EFI_D_INFO, "PlatformVarCleanup - User variable count: 0x%04x\n", mUserVariableCount)); 284 285 FreePool (VarName); 286 FreePool (Data); 287 } 288 289 /** 290 Destroy user variable nodes. 291 292 **/ 293 VOID 294 DestroyUserVariableNode ( 295 VOID 296 ) 297 { 298 USER_VARIABLE_NODE *UserVariableNode; 299 LIST_ENTRY *Link; 300 USER_VARIABLE_NAME_NODE *UserVariableNameNode; 301 LIST_ENTRY *NameLink; 302 303 while (mUserVariableList.ForwardLink != &mUserVariableList) { 304 Link = mUserVariableList.ForwardLink; 305 UserVariableNode = USER_VARIABLE_FROM_LINK (Link); 306 307 RemoveEntryList (&UserVariableNode->Link); 308 309 while (UserVariableNode->NameLink.ForwardLink != &UserVariableNode->NameLink) { 310 NameLink = UserVariableNode->NameLink.ForwardLink; 311 UserVariableNameNode = USER_VARIABLE_NAME_FROM_LINK (NameLink); 312 313 RemoveEntryList (&UserVariableNameNode->Link); 314 315 FreePool (UserVariableNameNode->Name); 316 FreePool (UserVariableNameNode->PromptString); 317 FreePool (UserVariableNameNode->HelpString); 318 FreePool (UserVariableNameNode); 319 } 320 321 FreePool (UserVariableNode->PromptString); 322 FreePool (UserVariableNode); 323 } 324 } 325 326 /** 327 Create a time based data payload by concatenating the EFI_VARIABLE_AUTHENTICATION_2 328 descriptor with the input data. NO authentication is required in this function. 329 330 @param[in, out] DataSize On input, the size of Data buffer in bytes. 331 On output, the size of data returned in Data 332 buffer in bytes. 333 @param[in, out] Data On input, Pointer to data buffer to be wrapped or 334 pointer to NULL to wrap an empty payload. 335 On output, Pointer to the new payload date buffer allocated from pool, 336 it's caller's responsibility to free the memory after using it. 337 338 @retval EFI_SUCCESS Create time based payload successfully. 339 @retval EFI_OUT_OF_RESOURCES There are not enough memory resourses to create time based payload. 340 @retval EFI_INVALID_PARAMETER The parameter is invalid. 341 @retval Others Unexpected error happens. 342 343 **/ 344 EFI_STATUS 345 CreateTimeBasedPayload ( 346 IN OUT UINTN *DataSize, 347 IN OUT UINT8 **Data 348 ) 349 { 350 EFI_STATUS Status; 351 UINT8 *NewData; 352 UINT8 *Payload; 353 UINTN PayloadSize; 354 EFI_VARIABLE_AUTHENTICATION_2 *DescriptorData; 355 UINTN DescriptorSize; 356 EFI_TIME Time; 357 358 if (Data == NULL || DataSize == NULL) { 359 return EFI_INVALID_PARAMETER; 360 } 361 362 // 363 // At user physical presence, the variable does not need to be signed but the 364 // parameters to the SetVariable() call still need to be prepared as authenticated 365 // variable. So we create EFI_VARIABLE_AUTHENTICATED_2 descriptor without certificate 366 // data in it. 367 // 368 Payload = *Data; 369 PayloadSize = *DataSize; 370 371 DescriptorSize = OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2, AuthInfo) + OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData); 372 NewData = (UINT8 *) AllocateZeroPool (DescriptorSize + PayloadSize); 373 if (NewData == NULL) { 374 return EFI_OUT_OF_RESOURCES; 375 } 376 377 if ((Payload != NULL) && (PayloadSize != 0)) { 378 CopyMem (NewData + DescriptorSize, Payload, PayloadSize); 379 } 380 381 DescriptorData = (EFI_VARIABLE_AUTHENTICATION_2 *) (NewData); 382 383 ZeroMem (&Time, sizeof (EFI_TIME)); 384 Status = gRT->GetTime (&Time, NULL); 385 if (EFI_ERROR (Status)) { 386 FreePool (NewData); 387 return Status; 388 } 389 Time.Pad1 = 0; 390 Time.Nanosecond = 0; 391 Time.TimeZone = 0; 392 Time.Daylight = 0; 393 Time.Pad2 = 0; 394 CopyMem (&DescriptorData->TimeStamp, &Time, sizeof (EFI_TIME)); 395 396 DescriptorData->AuthInfo.Hdr.dwLength = OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData); 397 DescriptorData->AuthInfo.Hdr.wRevision = 0x0200; 398 DescriptorData->AuthInfo.Hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID; 399 CopyGuid (&DescriptorData->AuthInfo.CertType, &gEfiCertPkcs7Guid); 400 401 if (Payload != NULL) { 402 FreePool (Payload); 403 } 404 405 *DataSize = DescriptorSize + PayloadSize; 406 *Data = NewData; 407 return EFI_SUCCESS; 408 } 409 410 /** 411 Create a counter based data payload by concatenating the EFI_VARIABLE_AUTHENTICATION 412 descriptor with the input data. NO authentication is required in this function. 413 414 @param[in, out] DataSize On input, the size of Data buffer in bytes. 415 On output, the size of data returned in Data 416 buffer in bytes. 417 @param[in, out] Data On input, Pointer to data buffer to be wrapped or 418 pointer to NULL to wrap an empty payload. 419 On output, Pointer to the new payload date buffer allocated from pool, 420 it's caller's responsibility to free the memory after using it. 421 422 @retval EFI_SUCCESS Create counter based payload successfully. 423 @retval EFI_OUT_OF_RESOURCES There are not enough memory resourses to create time based payload. 424 @retval EFI_INVALID_PARAMETER The parameter is invalid. 425 @retval Others Unexpected error happens. 426 427 **/ 428 EFI_STATUS 429 CreateCounterBasedPayload ( 430 IN OUT UINTN *DataSize, 431 IN OUT UINT8 **Data 432 ) 433 { 434 EFI_STATUS Status; 435 UINT8 *NewData; 436 UINT8 *Payload; 437 UINTN PayloadSize; 438 EFI_VARIABLE_AUTHENTICATION *DescriptorData; 439 UINTN DescriptorSize; 440 UINT64 MonotonicCount; 441 442 if (Data == NULL || DataSize == NULL) { 443 return EFI_INVALID_PARAMETER; 444 } 445 446 // 447 // At user physical presence, the variable does not need to be signed but the 448 // parameters to the SetVariable() call still need to be prepared as authenticated 449 // variable. So we create EFI_VARIABLE_AUTHENTICATED descriptor without certificate 450 // data in it. 451 // 452 Payload = *Data; 453 PayloadSize = *DataSize; 454 455 DescriptorSize = (OFFSET_OF (EFI_VARIABLE_AUTHENTICATION, AuthInfo)) + \ 456 (OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData)) + \ 457 sizeof (EFI_CERT_BLOCK_RSA_2048_SHA256); 458 NewData = (UINT8 *) AllocateZeroPool (DescriptorSize + PayloadSize); 459 if (NewData == NULL) { 460 return EFI_OUT_OF_RESOURCES; 461 } 462 463 if ((Payload != NULL) && (PayloadSize != 0)) { 464 CopyMem (NewData + DescriptorSize, Payload, PayloadSize); 465 } 466 467 DescriptorData = (EFI_VARIABLE_AUTHENTICATION *) (NewData); 468 469 Status = gBS->GetNextMonotonicCount (&MonotonicCount); 470 if (EFI_ERROR (Status)) { 471 FreePool (NewData); 472 return Status; 473 } 474 DescriptorData->MonotonicCount = MonotonicCount; 475 476 DescriptorData->AuthInfo.Hdr.dwLength = OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData) + sizeof (EFI_CERT_BLOCK_RSA_2048_SHA256); 477 DescriptorData->AuthInfo.Hdr.wRevision = 0x0200; 478 DescriptorData->AuthInfo.Hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID; 479 CopyGuid (&DescriptorData->AuthInfo.CertType, &gEfiCertTypeRsa2048Sha256Guid); 480 481 if (Payload != NULL) { 482 FreePool (Payload); 483 } 484 485 *DataSize = DescriptorSize + PayloadSize; 486 *Data = NewData; 487 return EFI_SUCCESS; 488 } 489 490 /** 491 Delete user variable. 492 493 @param[in] DeleteAll Delete all user variables. 494 @param[in] VariableCleanupData Pointer to variable cleanup data. 495 496 **/ 497 VOID 498 DeleteUserVariable ( 499 IN BOOLEAN DeleteAll, 500 IN VARIABLE_CLEANUP_DATA *VariableCleanupData OPTIONAL 501 ) 502 { 503 EFI_STATUS Status; 504 USER_VARIABLE_NODE *UserVariableNode; 505 LIST_ENTRY *Link; 506 USER_VARIABLE_NAME_NODE *UserVariableNameNode; 507 LIST_ENTRY *NameLink; 508 UINTN DataSize; 509 UINT8 *Data; 510 511 for (Link = mUserVariableList.ForwardLink 512 ;Link != &mUserVariableList 513 ;Link = Link->ForwardLink) { 514 UserVariableNode = USER_VARIABLE_FROM_LINK (Link); 515 516 for (NameLink = UserVariableNode->NameLink.ForwardLink 517 ;NameLink != &UserVariableNode->NameLink 518 ;NameLink = NameLink->ForwardLink) { 519 UserVariableNameNode = USER_VARIABLE_NAME_FROM_LINK (NameLink); 520 521 if (!UserVariableNameNode->Deleted && (DeleteAll || ((VariableCleanupData != NULL) && (VariableCleanupData->UserVariable[UserVariableNameNode->Index] == TRUE)))) { 522 DEBUG ((EFI_D_INFO, "PlatformVarCleanup - Delete variable: %g:%s\n", &UserVariableNode->Guid, UserVariableNameNode->Name)); 523 if ((UserVariableNameNode->Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) != 0) { 524 DataSize = 0; 525 Data = NULL; 526 Status = CreateTimeBasedPayload (&DataSize, &Data); 527 if (!EFI_ERROR (Status)) { 528 Status = gRT->SetVariable (UserVariableNameNode->Name, &UserVariableNode->Guid, UserVariableNameNode->Attributes, DataSize, Data); 529 FreePool (Data); 530 } 531 } else if ((UserVariableNameNode->Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) != 0) { 532 DataSize = 0; 533 Data = NULL; 534 Status = CreateCounterBasedPayload (&DataSize, &Data); 535 if (!EFI_ERROR (Status)) { 536 Status = gRT->SetVariable (UserVariableNameNode->Name, &UserVariableNode->Guid, UserVariableNameNode->Attributes, DataSize, Data); 537 FreePool (Data); 538 } 539 } else { 540 Status = gRT->SetVariable (UserVariableNameNode->Name, &UserVariableNode->Guid, 0, 0, NULL); 541 } 542 if (!EFI_ERROR (Status)) { 543 UserVariableNameNode->Deleted = TRUE; 544 } else { 545 DEBUG ((EFI_D_INFO, "PlatformVarCleanup - Delete variable fail: %g:%s\n", &UserVariableNode->Guid, UserVariableNameNode->Name)); 546 } 547 } 548 } 549 } 550 } 551 552 /** 553 This function allows a caller to extract the current configuration for one 554 or more named elements from the target driver. 555 556 @param[in] This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL. 557 @param[in] Request A null-terminated Unicode string in <ConfigRequest> format. 558 @param[out] Progress On return, points to a character in the Request string. 559 Points to the string's null terminator if request was successful. 560 Points to the most recent '&' before the first failing name/value 561 pair (or the beginning of the string if the failure is in the 562 first name/value pair) if the request was not successful. 563 @param[out] Results A null-terminated Unicode string in <ConfigAltResp> format which 564 has all values filled in for the names in the Request string. 565 String to be allocated by the called function. 566 567 @retval EFI_SUCCESS The Results is filled with the requested values. 568 @retval EFI_OUT_OF_RESOURCES Not enough memory to store the results. 569 @retval EFI_INVALID_PARAMETER Request is illegal syntax, or unknown name. 570 @retval EFI_NOT_FOUND Routing data doesn't match any storage in this driver. 571 572 **/ 573 EFI_STATUS 574 EFIAPI 575 VariableCleanupHiiExtractConfig ( 576 IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This, 577 IN CONST EFI_STRING Request, 578 OUT EFI_STRING *Progress, 579 OUT EFI_STRING *Results 580 ) 581 { 582 EFI_STATUS Status; 583 VARIABLE_CLEANUP_HII_PRIVATE_DATA *Private; 584 UINTN BufferSize; 585 EFI_STRING ConfigRequestHdr; 586 EFI_STRING ConfigRequest; 587 BOOLEAN AllocatedRequest; 588 UINTN Size; 589 590 if (Progress == NULL || Results == NULL) { 591 return EFI_INVALID_PARAMETER; 592 } 593 594 *Progress = Request; 595 if ((Request != NULL) && !HiiIsConfigHdrMatch (Request, &mVariableCleanupHiiGuid, mVarStoreName)) { 596 return EFI_NOT_FOUND; 597 } 598 599 ConfigRequestHdr = NULL; 600 ConfigRequest = NULL; 601 AllocatedRequest = FALSE; 602 Size = 0; 603 604 Private = VARIABLE_CLEANUP_HII_PRIVATE_FROM_THIS (This); 605 // 606 // Convert buffer data to <ConfigResp> by helper function BlockToConfig(). 607 // 608 BufferSize = sizeof (VARIABLE_CLEANUP_DATA); 609 ConfigRequest = Request; 610 if ((Request == NULL) || (StrStr (Request, L"OFFSET") == NULL)) { 611 // 612 // Request has no request element, construct full request string. 613 // Allocate and fill a buffer large enough to hold the <ConfigHdr> template 614 // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator. 615 // 616 ConfigRequestHdr = HiiConstructConfigHdr (&mVariableCleanupHiiGuid, mVarStoreName, Private->HiiHandle); 617 Size = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16); 618 ConfigRequest = AllocateZeroPool (Size); 619 ASSERT (ConfigRequest != NULL); 620 AllocatedRequest = TRUE; 621 UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", ConfigRequestHdr, (UINT64)BufferSize); 622 FreePool (ConfigRequestHdr); 623 } 624 625 Status = Private->ConfigRouting->BlockToConfig ( 626 Private->ConfigRouting, 627 ConfigRequest, 628 (UINT8 *) &Private->VariableCleanupData, 629 BufferSize, 630 Results, 631 Progress 632 ); 633 ASSERT_EFI_ERROR (Status); 634 635 // 636 // Free the allocated config request string. 637 // 638 if (AllocatedRequest) { 639 FreePool (ConfigRequest); 640 ConfigRequest = NULL; 641 } 642 // 643 // Set Progress string to the original request string or the string's null terminator. 644 // 645 if (Request == NULL) { 646 *Progress = NULL; 647 } else if (StrStr (Request, L"OFFSET") == NULL) { 648 *Progress = Request + StrLen (Request); 649 } 650 651 return Status; 652 } 653 654 /** 655 Update user variable form. 656 657 @param[in] Private Points to the VARIABLE_CLEANUP_HII_PRIVATE_DATA. 658 659 **/ 660 VOID 661 UpdateUserVariableForm ( 662 IN VARIABLE_CLEANUP_HII_PRIVATE_DATA *Private 663 ) 664 { 665 EFI_STRING_ID PromptStringToken; 666 EFI_STRING_ID HelpStringToken; 667 VOID *StartOpCodeHandle; 668 VOID *EndOpCodeHandle; 669 EFI_IFR_GUID_LABEL *StartLabel; 670 EFI_IFR_GUID_LABEL *EndLabel; 671 USER_VARIABLE_NODE *UserVariableNode; 672 LIST_ENTRY *Link; 673 USER_VARIABLE_NAME_NODE *UserVariableNameNode; 674 LIST_ENTRY *NameLink; 675 BOOLEAN Created; 676 677 // 678 // Init OpCode Handle. 679 // 680 StartOpCodeHandle = HiiAllocateOpCodeHandle (); 681 ASSERT (StartOpCodeHandle != NULL); 682 683 EndOpCodeHandle = HiiAllocateOpCodeHandle (); 684 ASSERT (EndOpCodeHandle != NULL); 685 686 // 687 // Create Hii Extend Label OpCode as the start opcode. 688 // 689 StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL)); 690 StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL; 691 StartLabel->Number = LABEL_START; 692 693 // 694 // Create Hii Extend Label OpCode as the end opcode. 695 // 696 EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL)); 697 EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL; 698 EndLabel->Number = LABEL_END; 699 700 HiiUpdateForm ( 701 Private->HiiHandle, 702 &mVariableCleanupHiiGuid, 703 FORM_ID_VARIABLE_CLEANUP, 704 StartOpCodeHandle, // LABEL_START 705 EndOpCodeHandle // LABEL_END 706 ); 707 708 for (Link = mUserVariableList.ForwardLink 709 ;Link != &mUserVariableList 710 ;Link = Link->ForwardLink) { 711 UserVariableNode = USER_VARIABLE_FROM_LINK (Link); 712 713 // 714 // Create checkbox opcode for variables in the same variable GUID space. 715 // 716 Created = FALSE; 717 for (NameLink = UserVariableNode->NameLink.ForwardLink 718 ;NameLink != &UserVariableNode->NameLink 719 ;NameLink = NameLink->ForwardLink) { 720 UserVariableNameNode = USER_VARIABLE_NAME_FROM_LINK (NameLink); 721 722 if (!UserVariableNameNode->Deleted) { 723 if (!Created) { 724 // 725 // Create subtitle opcode for variable GUID. 726 // 727 PromptStringToken = HiiSetString (Private->HiiHandle, 0, UserVariableNode->PromptString, NULL); 728 HiiCreateSubTitleOpCode (StartOpCodeHandle, PromptStringToken, 0, 0, 0); 729 Created = TRUE; 730 } 731 732 // 733 // Only create opcode for the non-deleted variables. 734 // 735 PromptStringToken = HiiSetString (Private->HiiHandle, 0, UserVariableNameNode->PromptString, NULL); 736 HelpStringToken = HiiSetString (Private->HiiHandle, 0, UserVariableNameNode->HelpString, NULL); 737 HiiCreateCheckBoxOpCode ( 738 StartOpCodeHandle, 739 UserVariableNameNode->QuestionId, 740 VARIABLE_CLEANUP_VARSTORE_ID, 741 (UINT16) (USER_VARIABLE_VAR_OFFSET + UserVariableNameNode->Index), 742 PromptStringToken, 743 HelpStringToken, 744 EFI_IFR_FLAG_CALLBACK, 745 Private->VariableCleanupData.UserVariable[UserVariableNameNode->Index], 746 NULL 747 ); 748 } 749 } 750 } 751 752 HiiCreateSubTitleOpCode ( 753 StartOpCodeHandle, 754 STRING_TOKEN (STR_NULL_STRING), 755 0, 756 0, 757 0 758 ); 759 760 // 761 // Create the "Apply changes" and "Discard changes" tags. 762 // 763 HiiCreateActionOpCode ( 764 StartOpCodeHandle, 765 SAVE_AND_EXIT_QUESTION_ID, 766 STRING_TOKEN (STR_SAVE_AND_EXIT), 767 STRING_TOKEN (STR_NULL_STRING), 768 EFI_IFR_FLAG_CALLBACK, 769 0 770 ); 771 HiiCreateActionOpCode ( 772 StartOpCodeHandle, 773 NO_SAVE_AND_EXIT_QUESTION_ID, 774 STRING_TOKEN (STR_NO_SAVE_AND_EXIT), 775 STRING_TOKEN (STR_NULL_STRING), 776 EFI_IFR_FLAG_CALLBACK, 777 0 778 ); 779 780 HiiUpdateForm ( 781 Private->HiiHandle, 782 &mVariableCleanupHiiGuid, 783 FORM_ID_VARIABLE_CLEANUP, 784 StartOpCodeHandle, // LABEL_START 785 EndOpCodeHandle // LABEL_END 786 ); 787 788 HiiFreeOpCodeHandle (StartOpCodeHandle); 789 HiiFreeOpCodeHandle (EndOpCodeHandle); 790 } 791 792 /** 793 This function applies changes in a driver's configuration. 794 Input is a Configuration, which has the routing data for this 795 driver followed by name / value configuration pairs. The driver 796 must apply those pairs to its configurable storage. If the 797 driver's configuration is stored in a linear block of data 798 and the driver's name / value pairs are in <BlockConfig> 799 format, it may use the ConfigToBlock helper function (above) to 800 simplify the job. Currently not implemented. 801 802 @param[in] This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL. 803 @param[in] Configuration A null-terminated Unicode string in 804 <ConfigString> format. 805 @param[out] Progress A pointer to a string filled in with the 806 offset of the most recent '&' before the 807 first failing name / value pair (or the 808 beginn ing of the string if the failure 809 is in the first name / value pair) or 810 the terminating NULL if all was 811 successful. 812 813 @retval EFI_SUCCESS The results have been distributed or are 814 awaiting distribution. 815 @retval EFI_OUT_OF_RESOURCES Not enough memory to store the 816 parts of the results that must be 817 stored awaiting possible future 818 protocols. 819 @retval EFI_INVALID_PARAMETERS Passing in a NULL for the 820 Results parameter would result 821 in this type of error. 822 @retval EFI_NOT_FOUND Target for the specified routing data 823 was not found. 824 825 **/ 826 EFI_STATUS 827 EFIAPI 828 VariableCleanupHiiRouteConfig ( 829 IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This, 830 IN CONST EFI_STRING Configuration, 831 OUT EFI_STRING *Progress 832 ) 833 { 834 EFI_STATUS Status; 835 VARIABLE_CLEANUP_HII_PRIVATE_DATA *Private; 836 UINTN BufferSize; 837 838 if (Progress == NULL) { 839 return EFI_INVALID_PARAMETER; 840 } 841 *Progress = Configuration; 842 843 if (Configuration == NULL) { 844 return EFI_INVALID_PARAMETER; 845 } 846 847 // 848 // Check routing data in <ConfigHdr>. 849 // Note: there is no name for Name/Value storage, only GUID will be checked. 850 // 851 if (!HiiIsConfigHdrMatch (Configuration, &mVariableCleanupHiiGuid, mVarStoreName)) { 852 return EFI_NOT_FOUND; 853 } 854 855 Private = VARIABLE_CLEANUP_HII_PRIVATE_FROM_THIS (This); 856 // 857 // Get Buffer Storage data. 858 // 859 BufferSize = sizeof (VARIABLE_CLEANUP_DATA); 860 // 861 // Convert <ConfigResp> to buffer data by helper function ConfigToBlock(). 862 // 863 Status = Private->ConfigRouting->ConfigToBlock ( 864 Private->ConfigRouting, 865 Configuration, 866 (UINT8 *) &Private->VariableCleanupData, 867 &BufferSize, 868 Progress 869 ); 870 ASSERT_EFI_ERROR (Status); 871 872 DeleteUserVariable (FALSE, &Private->VariableCleanupData); 873 // 874 // For "F10" hotkey to refresh the form. 875 // 876 // UpdateUserVariableForm (Private); 877 878 return EFI_SUCCESS; 879 } 880 881 /** 882 This function is called to provide results data to the driver. 883 This data consists of a unique key that is used to identify 884 which data is either being passed back or being asked for. 885 886 @param[in] This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL. 887 @param[in] Action Specifies the type of action taken by the browser. 888 @param[in] QuestionId A unique value which is sent to the original 889 exporting driver so that it can identify the type 890 of data to expect. The format of the data tends to 891 vary based on the opcode that generated the callback. 892 @param[in] Type The type of value for the question. 893 @param[in] Value A pointer to the data being sent to the original 894 exporting driver. 895 @param[out] ActionRequest On return, points to the action requested by the 896 callback function. 897 898 @retval EFI_SUCCESS The callback successfully handled the action. 899 @retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the 900 variable and its data. 901 @retval EFI_DEVICE_ERROR The variable could not be saved. 902 @retval EFI_UNSUPPORTED The specified Action is not supported by the 903 callback. 904 **/ 905 EFI_STATUS 906 EFIAPI 907 VariableCleanupHiiCallback ( 908 IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This, 909 IN EFI_BROWSER_ACTION Action, 910 IN EFI_QUESTION_ID QuestionId, 911 IN UINT8 Type, 912 IN EFI_IFR_TYPE_VALUE *Value, 913 OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest 914 ) 915 { 916 VARIABLE_CLEANUP_HII_PRIVATE_DATA *Private; 917 VARIABLE_CLEANUP_DATA *VariableCleanupData; 918 919 Private = VARIABLE_CLEANUP_HII_PRIVATE_FROM_THIS (This); 920 921 if ((Action != EFI_BROWSER_ACTION_CHANGING) && (Action != EFI_BROWSER_ACTION_CHANGED)) { 922 // 923 // All other action return unsupported. 924 // 925 return EFI_UNSUPPORTED; 926 } 927 928 // 929 // Retrieve uncommitted data from Form Browser. 930 // 931 VariableCleanupData = &Private->VariableCleanupData; 932 HiiGetBrowserData (&mVariableCleanupHiiGuid, mVarStoreName, sizeof (VARIABLE_CLEANUP_DATA), (UINT8 *) VariableCleanupData); 933 if (Action == EFI_BROWSER_ACTION_CHANGING) { 934 if (Value == NULL) { 935 return EFI_INVALID_PARAMETER; 936 } 937 } else if (Action == EFI_BROWSER_ACTION_CHANGED) { 938 if ((Value == NULL) || (ActionRequest == NULL)) { 939 return EFI_INVALID_PARAMETER; 940 } 941 if ((QuestionId >= USER_VARIABLE_QUESTION_ID) && (QuestionId < USER_VARIABLE_QUESTION_ID + MAX_USER_VARIABLE_COUNT)) { 942 if (Value->b){ 943 // 944 // Means one user variable checkbox is marked to delete but not press F10 or "Commit Changes and Exit" menu. 945 // 946 mMarkedUserVariableCount++; 947 ASSERT (mMarkedUserVariableCount <= mUserVariableCount); 948 if (mMarkedUserVariableCount == mUserVariableCount) { 949 // 950 // All user variables have been marked, then also mark the SelectAll checkbox. 951 // 952 VariableCleanupData->SelectAll = TRUE; 953 } 954 } else { 955 // 956 // Means one user variable checkbox is unmarked. 957 // 958 mMarkedUserVariableCount--; 959 // 960 // Also unmark the SelectAll checkbox. 961 // 962 VariableCleanupData->SelectAll = FALSE; 963 } 964 } else { 965 switch (QuestionId) { 966 case SELECT_ALL_QUESTION_ID: 967 if (Value->b){ 968 // 969 // Means the SelectAll checkbox is marked to delete all user variables but not press F10 or "Commit Changes and Exit" menu. 970 // 971 SetMem (VariableCleanupData->UserVariable, sizeof (VariableCleanupData->UserVariable), TRUE); 972 mMarkedUserVariableCount = mUserVariableCount; 973 } else { 974 // 975 // Means the SelectAll checkbox is unmarked. 976 // 977 SetMem (VariableCleanupData->UserVariable, sizeof (VariableCleanupData->UserVariable), FALSE); 978 mMarkedUserVariableCount = 0; 979 } 980 break; 981 case SAVE_AND_EXIT_QUESTION_ID: 982 DeleteUserVariable (FALSE, VariableCleanupData); 983 *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT; 984 break; 985 986 case NO_SAVE_AND_EXIT_QUESTION_ID: 987 // 988 // Restore local maintain data. 989 // 990 *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT; 991 break; 992 993 default: 994 break; 995 } 996 } 997 } 998 999 // 1000 // Pass changed uncommitted data back to Form Browser. 1001 // 1002 HiiSetBrowserData (&mVariableCleanupHiiGuid, mVarStoreName, sizeof (VARIABLE_CLEANUP_DATA), (UINT8 *) VariableCleanupData, NULL); 1003 return EFI_SUCCESS; 1004 } 1005 1006 /** 1007 Platform variable cleanup. 1008 1009 @param[in] Flag Variable error flag. 1010 @param[in] Type Variable cleanup type. 1011 If it is VarCleanupManually, the interface must be called after console connected. 1012 1013 @retval EFI_SUCCESS No error or error processed. 1014 @retval EFI_UNSUPPORTED The specified Flag or Type is not supported. 1015 For example, system error may be not supported to process and Platform should have mechanism to reset system to manufacture mode. 1016 Another, if system and user variables are wanted to be distinguished to process, the interface must be called after EndOfDxe. 1017 @retval EFI_OUT_OF_RESOURCES Not enough resource to process the error. 1018 @retval EFI_INVALID_PARAMETER The specified Flag or Type is an invalid value. 1019 @retval Others Other failure occurs. 1020 1021 **/ 1022 EFI_STATUS 1023 EFIAPI 1024 PlatformVarCleanup ( 1025 IN VAR_ERROR_FLAG Flag, 1026 IN VAR_CLEANUP_TYPE Type 1027 ) 1028 { 1029 EFI_STATUS Status; 1030 EFI_FORM_BROWSER2_PROTOCOL *FormBrowser2; 1031 VARIABLE_CLEANUP_HII_PRIVATE_DATA *Private; 1032 1033 if (!mEndOfDxe) { 1034 // 1035 // This implementation must be called after EndOfDxe. 1036 // 1037 return EFI_UNSUPPORTED; 1038 } 1039 1040 if ((Type >= VarCleanupMax) || ((Flag & ((VAR_ERROR_FLAG) (VAR_ERROR_FLAG_SYSTEM_ERROR & VAR_ERROR_FLAG_USER_ERROR))) == 0)) { 1041 return EFI_INVALID_PARAMETER; 1042 } 1043 1044 if (Flag == VAR_ERROR_FLAG_NO_ERROR) { 1045 // 1046 // Just return success if no error. 1047 // 1048 return EFI_SUCCESS; 1049 } 1050 1051 if ((Flag & (~((VAR_ERROR_FLAG) VAR_ERROR_FLAG_SYSTEM_ERROR))) == 0) { 1052 // 1053 // This sample does not support system variables cleanup. 1054 // 1055 DEBUG ((EFI_D_ERROR, "NOTICE - VAR_ERROR_FLAG_SYSTEM_ERROR\n")); 1056 DEBUG ((EFI_D_ERROR, "Platform should have mechanism to reset system to manufacture mode\n")); 1057 return EFI_UNSUPPORTED; 1058 } 1059 1060 // 1061 // Continue to process VAR_ERROR_FLAG_USER_ERROR. 1062 // 1063 1064 // 1065 // Create user variable nodes for the following processing. 1066 // 1067 CreateUserVariableNode (); 1068 1069 switch (Type) { 1070 case VarCleanupAll: 1071 DeleteUserVariable (TRUE, NULL); 1072 // 1073 // Destroyed the created user variable nodes 1074 // 1075 DestroyUserVariableNode (); 1076 return EFI_SUCCESS; 1077 break; 1078 1079 case VarCleanupManually: 1080 // 1081 // Locate FormBrowser2 protocol. 1082 // 1083 Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **) &FormBrowser2); 1084 if (EFI_ERROR (Status)) { 1085 return Status; 1086 } 1087 1088 Private = AllocateZeroPool (sizeof (VARIABLE_CLEANUP_HII_PRIVATE_DATA)); 1089 if (Private == NULL) { 1090 return EFI_OUT_OF_RESOURCES; 1091 } 1092 1093 Private->Signature = VARIABLE_CLEANUP_HII_PRIVATE_SIGNATURE; 1094 Private->ConfigAccess.ExtractConfig = VariableCleanupHiiExtractConfig; 1095 Private->ConfigAccess.RouteConfig = VariableCleanupHiiRouteConfig; 1096 Private->ConfigAccess.Callback = VariableCleanupHiiCallback; 1097 1098 Status = gBS->LocateProtocol ( 1099 &gEfiHiiConfigRoutingProtocolGuid, 1100 NULL, 1101 (VOID **) &Private->ConfigRouting 1102 ); 1103 if (EFI_ERROR (Status)) { 1104 goto Done; 1105 } 1106 1107 // 1108 // Install Device Path Protocol and Config Access protocol to driver handle. 1109 // 1110 Status = gBS->InstallMultipleProtocolInterfaces ( 1111 &Private->DriverHandle, 1112 &gEfiDevicePathProtocolGuid, 1113 &mVarCleanupHiiVendorDevicePath, 1114 &gEfiHiiConfigAccessProtocolGuid, 1115 &Private->ConfigAccess, 1116 NULL 1117 ); 1118 if (EFI_ERROR (Status)) { 1119 goto Done; 1120 } 1121 1122 // 1123 // Publish our HII data. 1124 // 1125 Private->HiiHandle = HiiAddPackages ( 1126 &mVariableCleanupHiiGuid, 1127 Private->DriverHandle, 1128 PlatformVarCleanupLibStrings, 1129 PlatVarCleanupBin, 1130 NULL 1131 ); 1132 if (Private->HiiHandle == NULL) { 1133 Status = EFI_OUT_OF_RESOURCES; 1134 goto Done; 1135 } 1136 1137 UpdateUserVariableForm (Private); 1138 1139 Status = FormBrowser2->SendForm ( 1140 FormBrowser2, 1141 &Private->HiiHandle, 1142 1, 1143 NULL, 1144 0, 1145 NULL, 1146 NULL 1147 ); 1148 break; 1149 1150 default: 1151 return EFI_UNSUPPORTED; 1152 break; 1153 } 1154 1155 Done: 1156 if (Private->DriverHandle != NULL) { 1157 gBS->UninstallMultipleProtocolInterfaces ( 1158 Private->DriverHandle, 1159 &gEfiDevicePathProtocolGuid, 1160 &mVarCleanupHiiVendorDevicePath, 1161 &gEfiHiiConfigAccessProtocolGuid, 1162 &Private->ConfigAccess, 1163 NULL 1164 ); 1165 } 1166 if (Private->HiiHandle != NULL) { 1167 HiiRemovePackages (Private->HiiHandle); 1168 } 1169 1170 FreePool (Private); 1171 1172 // 1173 // Destroyed the created user variable nodes 1174 // 1175 DestroyUserVariableNode (); 1176 return Status; 1177 } 1178 1179 /** 1180 Get last boot variable error flag. 1181 1182 @return Last boot variable error flag. 1183 1184 **/ 1185 VAR_ERROR_FLAG 1186 EFIAPI 1187 GetLastBootVarErrorFlag ( 1188 ) 1189 { 1190 return mLastVarErrorFlag; 1191 } 1192 1193 /** 1194 Notification function of END_OF_DXE. 1195 1196 This is a notification function registered on END_OF_DXE event. 1197 1198 @param[in] Event Event whose notification function is being invoked. 1199 @param[in] Context Pointer to the notification function's context. 1200 1201 **/ 1202 VOID 1203 EFIAPI 1204 PlatformVarCleanupEndOfDxeEvent ( 1205 IN EFI_EVENT Event, 1206 IN VOID *Context 1207 ) 1208 { 1209 mEndOfDxe = TRUE; 1210 } 1211 1212 /** 1213 The constructor function caches the pointer to VarCheck protocol and last boot variable error flag. 1214 1215 The constructor function locates VarCheck protocol from protocol database. 1216 It will ASSERT() if that operation fails and it will always return EFI_SUCCESS. 1217 1218 @param ImageHandle The firmware allocated handle for the EFI image. 1219 @param SystemTable A pointer to the EFI System Table. 1220 1221 @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS. 1222 1223 **/ 1224 EFI_STATUS 1225 EFIAPI 1226 PlatformVarCleanupLibConstructor ( 1227 IN EFI_HANDLE ImageHandle, 1228 IN EFI_SYSTEM_TABLE *SystemTable 1229 ) 1230 { 1231 EFI_STATUS Status; 1232 EFI_EVENT Event; 1233 1234 mLastVarErrorFlag = InternalGetVarErrorFlag (); 1235 DEBUG ((EFI_D_INFO, "mLastVarErrorFlag - 0x%02x\n", mLastVarErrorFlag)); 1236 1237 // 1238 // Register EFI_END_OF_DXE_EVENT_GROUP_GUID event. 1239 // 1240 Status = gBS->CreateEventEx ( 1241 EVT_NOTIFY_SIGNAL, 1242 TPL_CALLBACK, 1243 PlatformVarCleanupEndOfDxeEvent, 1244 NULL, 1245 &gEfiEndOfDxeEventGroupGuid, 1246 &Event 1247 ); 1248 ASSERT_EFI_ERROR (Status); 1249 1250 return EFI_SUCCESS; 1251 } 1252 1253
