1 /** @file 2 Help functions used by PCD DXE driver. 3 4 Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR> 5 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 #include "Service.h" 17 #include <Library/DxeServicesLib.h> 18 19 PCD_DATABASE mPcdDatabase; 20 21 UINT32 mPcdTotalTokenCount; 22 UINT32 mPeiLocalTokenCount; 23 UINT32 mDxeLocalTokenCount; 24 UINT32 mPeiNexTokenCount; 25 UINT32 mDxeNexTokenCount; 26 UINT32 mPeiExMapppingTableSize; 27 UINT32 mDxeExMapppingTableSize; 28 UINT32 mPeiGuidTableSize; 29 UINT32 mDxeGuidTableSize; 30 31 BOOLEAN mPeiExMapTableEmpty; 32 BOOLEAN mDxeExMapTableEmpty; 33 BOOLEAN mPeiDatabaseEmpty; 34 35 LIST_ENTRY *mCallbackFnTable; 36 EFI_GUID **TmpTokenSpaceBuffer; 37 UINTN TmpTokenSpaceBufferCount; 38 39 /** 40 Get Local Token Number by Token Number. 41 42 @param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 43 If FALSE, the pcd entry is initialized in DXE phase. 44 @param[in] TokenNumber The PCD token number. 45 46 @return Local Token Number. 47 **/ 48 UINT32 49 GetLocalTokenNumber ( 50 IN BOOLEAN IsPeiDb, 51 IN UINTN TokenNumber 52 ) 53 { 54 UINTN TmpTokenNumber; 55 UINT32 *LocalTokenNumberTable; 56 UINT32 LocalTokenNumber; 57 UINTN Size; 58 UINTN MaxSize; 59 60 // 61 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 62 // We have to decrement TokenNumber by 1 to make it usable 63 // as the array index. 64 // 65 TokenNumber--; 66 67 // 68 // Backup the TokenNumber passed in as GetPtrTypeSize need the original TokenNumber 69 // 70 TmpTokenNumber = TokenNumber; 71 72 LocalTokenNumberTable = IsPeiDb ? (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset) : 73 (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset); 74 TokenNumber = IsPeiDb ? TokenNumber : TokenNumber - mPeiLocalTokenCount; 75 76 LocalTokenNumber = LocalTokenNumberTable[TokenNumber]; 77 78 Size = (LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT; 79 80 if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == PCD_TYPE_SKU_ENABLED) { 81 if (Size == 0) { 82 GetPtrTypeSize (TmpTokenNumber, &MaxSize); 83 } else { 84 MaxSize = Size; 85 } 86 LocalTokenNumber = GetSkuEnabledTokenNumber (LocalTokenNumber & ~PCD_TYPE_SKU_ENABLED, MaxSize, IsPeiDb); 87 } 88 89 return LocalTokenNumber; 90 } 91 92 /** 93 Get PCD type by Local Token Number. 94 95 @param[in] LocalTokenNumber The PCD local token number. 96 97 @return PCD type. 98 **/ 99 EFI_PCD_TYPE 100 GetPcdType ( 101 IN UINT32 LocalTokenNumber 102 ) 103 { 104 switch (LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) { 105 case PCD_DATUM_TYPE_POINTER: 106 return EFI_PCD_TYPE_PTR; 107 case PCD_DATUM_TYPE_UINT8: 108 if ((LocalTokenNumber & PCD_DATUM_TYPE_UINT8_BOOLEAN) == PCD_DATUM_TYPE_UINT8_BOOLEAN) { 109 return EFI_PCD_TYPE_BOOL; 110 } else { 111 return EFI_PCD_TYPE_8; 112 } 113 case PCD_DATUM_TYPE_UINT16: 114 return EFI_PCD_TYPE_16; 115 case PCD_DATUM_TYPE_UINT32: 116 return EFI_PCD_TYPE_32; 117 case PCD_DATUM_TYPE_UINT64: 118 return EFI_PCD_TYPE_64; 119 default: 120 ASSERT (FALSE); 121 return EFI_PCD_TYPE_8; 122 } 123 } 124 125 /** 126 Get PCD name. 127 128 @param[in] OnlyTokenSpaceName If TRUE, only need to get the TokenSpaceCName. 129 If FALSE, need to get the full PCD name. 130 @param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 131 If FALSE, the pcd entry is initialized in DXE phase. 132 @param[in] TokenNumber The PCD token number. 133 134 @return The TokenSpaceCName or full PCD name. 135 **/ 136 CHAR8 * 137 GetPcdName ( 138 IN BOOLEAN OnlyTokenSpaceName, 139 IN BOOLEAN IsPeiDb, 140 IN UINTN TokenNumber 141 ) 142 { 143 PCD_DATABASE_INIT *Database; 144 UINT8 *StringTable; 145 UINTN NameSize; 146 PCD_NAME_INDEX *PcdNameIndex; 147 CHAR8 *TokenSpaceName; 148 CHAR8 *PcdName; 149 CHAR8 *Name; 150 151 // 152 // Return NULL when PCD name table is absent. 153 // 154 if (IsPeiDb) { 155 if (mPcdDatabase.PeiDb->PcdNameTableOffset == 0) { 156 return NULL; 157 } 158 } else { 159 if (mPcdDatabase.DxeDb->PcdNameTableOffset == 0) { 160 return NULL; 161 } 162 } 163 164 // 165 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 166 // We have to decrement TokenNumber by 1 to make it usable 167 // as the array index. 168 // 169 TokenNumber--; 170 171 Database = IsPeiDb ? mPcdDatabase.PeiDb: mPcdDatabase.DxeDb; 172 TokenNumber = IsPeiDb ? TokenNumber : TokenNumber - mPeiLocalTokenCount; 173 174 StringTable = (UINT8 *) Database + Database->StringTableOffset; 175 176 // 177 // Get the PCD name index. 178 // 179 PcdNameIndex = (PCD_NAME_INDEX *)((UINT8 *) Database + Database->PcdNameTableOffset) + TokenNumber; 180 TokenSpaceName = (CHAR8 *)&StringTable[PcdNameIndex->TokenSpaceCNameIndex]; 181 PcdName = (CHAR8 *)&StringTable[PcdNameIndex->PcdCNameIndex]; 182 183 if (OnlyTokenSpaceName) { 184 // 185 // Only need to get the TokenSpaceCName. 186 // 187 Name = AllocateCopyPool (AsciiStrSize (TokenSpaceName), TokenSpaceName); 188 } else { 189 // 190 // Need to get the full PCD name. 191 // 192 NameSize = AsciiStrSize (TokenSpaceName) + AsciiStrSize (PcdName); 193 Name = AllocateZeroPool (NameSize); 194 ASSERT (Name != NULL); 195 // 196 // Catenate TokenSpaceCName and PcdCName with a '.' to form the full PCD name. 197 // 198 AsciiStrCatS (Name, NameSize, TokenSpaceName); 199 Name[AsciiStrSize (TokenSpaceName) - sizeof (CHAR8)] = '.'; 200 AsciiStrCatS (Name, NameSize, PcdName); 201 } 202 203 return Name; 204 } 205 206 /** 207 Retrieve additional information associated with a PCD token. 208 209 This includes information such as the type of value the TokenNumber is associated with as well as possible 210 human readable name that is associated with the token. 211 212 @param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 213 If FALSE, the pcd entry is initialized in DXE phase. 214 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value. 215 @param[in] TokenNumber The PCD token number. 216 @param[out] PcdInfo The returned information associated with the requested TokenNumber. 217 The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName. 218 219 @retval EFI_SUCCESS The PCD information was returned successfully 220 @retval EFI_NOT_FOUND The PCD service could not find the requested token number. 221 **/ 222 EFI_STATUS 223 ExGetPcdInfo ( 224 IN BOOLEAN IsPeiDb, 225 IN CONST EFI_GUID *Guid, 226 IN UINTN TokenNumber, 227 OUT EFI_PCD_INFO *PcdInfo 228 ) 229 { 230 PCD_DATABASE_INIT *Database; 231 UINTN GuidTableIdx; 232 EFI_GUID *MatchGuid; 233 EFI_GUID *GuidTable; 234 DYNAMICEX_MAPPING *ExMapTable; 235 UINTN Index; 236 UINT32 LocalTokenNumber; 237 238 Database = IsPeiDb ? mPcdDatabase.PeiDb: mPcdDatabase.DxeDb; 239 240 GuidTable = (EFI_GUID *)((UINT8 *)Database + Database->GuidTableOffset); 241 MatchGuid = ScanGuid (GuidTable, Database->GuidTableCount * sizeof(EFI_GUID), Guid); 242 243 if (MatchGuid == NULL) { 244 return EFI_NOT_FOUND; 245 } 246 247 GuidTableIdx = MatchGuid - GuidTable; 248 249 ExMapTable = (DYNAMICEX_MAPPING *)((UINT8 *)Database + Database->ExMapTableOffset); 250 251 // 252 // Find the PCD by GuidTableIdx and ExTokenNumber in ExMapTable. 253 // 254 for (Index = 0; Index < Database->ExTokenCount; Index++) { 255 if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) { 256 if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) { 257 // 258 // TokenNumber is 0, follow spec to set PcdType to EFI_PCD_TYPE_8, 259 // PcdSize to 0 and PcdName to the null-terminated ASCII string 260 // associated with the token's namespace Guid. 261 // 262 PcdInfo->PcdType = EFI_PCD_TYPE_8; 263 PcdInfo->PcdSize = 0; 264 // 265 // Here use one representative in the token space to get the TokenSpaceCName. 266 // 267 PcdInfo->PcdName = GetPcdName (TRUE, IsPeiDb, ExMapTable[Index].TokenNumber); 268 return EFI_SUCCESS; 269 } else if (ExMapTable[Index].ExTokenNumber == TokenNumber) { 270 PcdInfo->PcdSize = DxePcdGetSize (ExMapTable[Index].TokenNumber); 271 LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, ExMapTable[Index].TokenNumber); 272 PcdInfo->PcdType = GetPcdType (LocalTokenNumber); 273 PcdInfo->PcdName = GetPcdName (FALSE, IsPeiDb, ExMapTable[Index].TokenNumber); 274 return EFI_SUCCESS; 275 } 276 } 277 } 278 279 return EFI_NOT_FOUND; 280 } 281 282 /** 283 Retrieve additional information associated with a PCD token. 284 285 This includes information such as the type of value the TokenNumber is associated with as well as possible 286 human readable name that is associated with the token. 287 288 @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value. 289 @param[in] TokenNumber The PCD token number. 290 @param[out] PcdInfo The returned information associated with the requested TokenNumber. 291 The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName. 292 293 @retval EFI_SUCCESS The PCD information was returned successfully. 294 @retval EFI_NOT_FOUND The PCD service could not find the requested token number. 295 **/ 296 EFI_STATUS 297 DxeGetPcdInfo ( 298 IN CONST EFI_GUID *Guid, 299 IN UINTN TokenNumber, 300 OUT EFI_PCD_INFO *PcdInfo 301 ) 302 { 303 EFI_STATUS Status; 304 BOOLEAN PeiExMapTableEmpty; 305 BOOLEAN DxeExMapTableEmpty; 306 UINT32 LocalTokenNumber; 307 BOOLEAN IsPeiDb; 308 309 ASSERT (PcdInfo != NULL); 310 311 Status = EFI_NOT_FOUND; 312 PeiExMapTableEmpty = mPeiExMapTableEmpty; 313 DxeExMapTableEmpty = mDxeExMapTableEmpty; 314 315 if (Guid == NULL) { 316 if (((TokenNumber + 1 > mPeiNexTokenCount + 1) && (TokenNumber + 1 <= mPeiLocalTokenCount + 1)) || 317 ((TokenNumber + 1 > (mPeiLocalTokenCount + mDxeNexTokenCount + 1)))) { 318 return EFI_NOT_FOUND; 319 } else if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) { 320 // 321 // TokenNumber is 0, follow spec to set PcdType to EFI_PCD_TYPE_8, 322 // PcdSize to 0 and PcdName to NULL for default Token Space. 323 // 324 PcdInfo->PcdType = EFI_PCD_TYPE_8; 325 PcdInfo->PcdSize = 0; 326 PcdInfo->PcdName = NULL; 327 } else { 328 PcdInfo->PcdSize = DxePcdGetSize (TokenNumber); 329 IsPeiDb = FALSE; 330 if ((TokenNumber + 1 <= mPeiNexTokenCount + 1)) { 331 IsPeiDb = TRUE; 332 } 333 LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber); 334 PcdInfo->PcdType = GetPcdType (LocalTokenNumber); 335 PcdInfo->PcdName = GetPcdName (FALSE, IsPeiDb, TokenNumber); 336 } 337 return EFI_SUCCESS; 338 } 339 340 if (PeiExMapTableEmpty && DxeExMapTableEmpty) { 341 return EFI_NOT_FOUND; 342 } 343 344 if (!PeiExMapTableEmpty) { 345 Status = ExGetPcdInfo ( 346 TRUE, 347 Guid, 348 TokenNumber, 349 PcdInfo 350 ); 351 } 352 353 if (Status == EFI_SUCCESS) { 354 return Status; 355 } 356 357 if (!DxeExMapTableEmpty) { 358 Status = ExGetPcdInfo ( 359 FALSE, 360 Guid, 361 TokenNumber, 362 PcdInfo 363 ); 364 } 365 366 return Status; 367 } 368 369 /** 370 Get the PCD entry pointer in PCD database. 371 372 This routine will visit PCD database to find the PCD entry according to given 373 token number. The given token number is autogened by build tools and it will be 374 translated to local token number. Local token number contains PCD's type and 375 offset of PCD entry in PCD database. 376 377 @param TokenNumber Token's number, it is autogened by build tools 378 @param GetSize The size of token's value 379 380 @return PCD entry pointer in PCD database 381 382 **/ 383 VOID * 384 GetWorker ( 385 IN UINTN TokenNumber, 386 IN UINTN GetSize 387 ) 388 { 389 EFI_GUID *GuidTable; 390 UINT8 *StringTable; 391 EFI_GUID *Guid; 392 UINT16 *Name; 393 VARIABLE_HEAD *VariableHead; 394 UINT8 *VaraiableDefaultBuffer; 395 UINT8 *Data; 396 VPD_HEAD *VpdHead; 397 UINT8 *PcdDb; 398 VOID *RetPtr; 399 UINTN TmpTokenNumber; 400 UINTN DataSize; 401 EFI_STATUS Status; 402 UINT32 LocalTokenNumber; 403 UINT32 Offset; 404 STRING_HEAD StringTableIdx; 405 BOOLEAN IsPeiDb; 406 407 // 408 // Aquire lock to prevent reentrance from TPL_CALLBACK level 409 // 410 EfiAcquireLock (&mPcdDatabaseLock); 411 412 RetPtr = NULL; 413 414 ASSERT (TokenNumber > 0); 415 // 416 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 417 // We have to decrement TokenNumber by 1 to make it usable 418 // as the array index. 419 // 420 TokenNumber--; 421 422 TmpTokenNumber = TokenNumber; 423 424 // 425 // EBC compiler is very choosy. It may report warning about comparison 426 // between UINTN and 0 . So we add 1 in each size of the 427 // comparison. 428 // 429 ASSERT (TokenNumber + 1 < mPcdTotalTokenCount + 1); 430 431 ASSERT ((GetSize == DxePcdGetSize (TokenNumber + 1)) || (GetSize == 0)); 432 433 // EBC compiler is very choosy. It may report warning about comparison 434 // between UINTN and 0 . So we add 1 in each size of the 435 // comparison. 436 IsPeiDb = (BOOLEAN) ((TokenNumber + 1 < mPeiLocalTokenCount + 1) ? TRUE : FALSE); 437 438 LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber + 1); 439 440 PcdDb = IsPeiDb ? ((UINT8 *) mPcdDatabase.PeiDb) : ((UINT8 *) mPcdDatabase.DxeDb); 441 442 if (IsPeiDb) { 443 StringTable = (UINT8 *) ((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->StringTableOffset); 444 } else { 445 StringTable = (UINT8 *) ((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->StringTableOffset); 446 } 447 448 449 Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK; 450 451 switch (LocalTokenNumber & PCD_TYPE_ALL_SET) { 452 case PCD_TYPE_VPD: 453 VpdHead = (VPD_HEAD *) ((UINT8 *) PcdDb + Offset); 454 RetPtr = (VOID *) (UINTN) (PcdGet32 (PcdVpdBaseAddress) + VpdHead->Offset); 455 456 break; 457 458 case PCD_TYPE_HII|PCD_TYPE_STRING: 459 case PCD_TYPE_HII: 460 if (IsPeiDb) { 461 GuidTable = (EFI_GUID *) ((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset); 462 } else { 463 GuidTable = (EFI_GUID *) ((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset); 464 } 465 466 VariableHead = (VARIABLE_HEAD *) (PcdDb + Offset); 467 Guid = GuidTable + VariableHead->GuidTableIndex; 468 Name = (UINT16*)(StringTable + VariableHead->StringIndex); 469 470 if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) { 471 // 472 // If a HII type PCD's datum type is VOID*, the DefaultValueOffset is the index of 473 // string array in string table. 474 // 475 StringTableIdx = *(STRING_HEAD*)((UINT8 *) PcdDb + VariableHead->DefaultValueOffset); 476 VaraiableDefaultBuffer = (UINT8 *) (StringTable + StringTableIdx); 477 } else { 478 VaraiableDefaultBuffer = (UINT8 *) PcdDb + VariableHead->DefaultValueOffset; 479 } 480 Status = GetHiiVariable (Guid, Name, &Data, &DataSize); 481 if (Status == EFI_SUCCESS) { 482 if (DataSize >= (VariableHead->Offset + GetSize)) { 483 if (GetSize == 0) { 484 // 485 // It is a pointer type. So get the MaxSize reserved for 486 // this PCD entry. 487 // 488 GetPtrTypeSize (TmpTokenNumber, &GetSize); 489 if (GetSize > (DataSize - VariableHead->Offset)) { 490 // 491 // Use actual valid size. 492 // 493 GetSize = DataSize - VariableHead->Offset; 494 } 495 } 496 // 497 // If the operation is successful, we copy the data 498 // to the default value buffer in the PCD Database. 499 // So that we can free the Data allocated in GetHiiVariable. 500 // 501 CopyMem (VaraiableDefaultBuffer, Data + VariableHead->Offset, GetSize); 502 } 503 FreePool (Data); 504 } 505 RetPtr = (VOID *) VaraiableDefaultBuffer; 506 break; 507 508 case PCD_TYPE_STRING: 509 StringTableIdx = *(STRING_HEAD*)((UINT8 *) PcdDb + Offset); 510 RetPtr = (VOID *) (StringTable + StringTableIdx); 511 break; 512 513 case PCD_TYPE_DATA: 514 RetPtr = (VOID *) ((UINT8 *) PcdDb + Offset); 515 break; 516 517 default: 518 ASSERT (FALSE); 519 break; 520 521 } 522 523 EfiReleaseLock (&mPcdDatabaseLock); 524 525 return RetPtr; 526 527 } 528 529 /** 530 Register the callback function for a PCD entry. 531 532 This routine will register a callback function to a PCD entry by given token number 533 and token space guid. 534 535 @param TokenNumber PCD token's number, it is autogened by build tools. 536 @param Guid PCD token space's guid, 537 if not NULL, this PCD is dynamicEx type PCD. 538 @param CallBackFunction Callback function pointer 539 540 @return EFI_SUCCESS Always success for registering callback function. 541 542 **/ 543 EFI_STATUS 544 DxeRegisterCallBackWorker ( 545 IN UINTN TokenNumber, 546 IN CONST EFI_GUID *Guid, OPTIONAL 547 IN PCD_PROTOCOL_CALLBACK CallBackFunction 548 ) 549 { 550 CALLBACK_FN_ENTRY *FnTableEntry; 551 LIST_ENTRY *ListHead; 552 LIST_ENTRY *ListNode; 553 554 if (Guid != NULL) { 555 TokenNumber = GetExPcdTokenNumber (Guid, (UINT32) TokenNumber); 556 } 557 558 // 559 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 560 // We have to decrement TokenNumber by 1 to make it usable 561 // as the array index of mCallbackFnTable[]. 562 // 563 ListHead = &mCallbackFnTable[TokenNumber - 1]; 564 ListNode = GetFirstNode (ListHead); 565 566 while (ListNode != ListHead) { 567 FnTableEntry = CR_FNENTRY_FROM_LISTNODE(ListNode, CALLBACK_FN_ENTRY, Node); 568 569 if (FnTableEntry->CallbackFn == CallBackFunction) { 570 // 571 // We only allow a Callback function to be register once 572 // for a TokenNumber. So just return EFI_SUCCESS 573 // 574 return EFI_SUCCESS; 575 } 576 ListNode = GetNextNode (ListHead, ListNode); 577 } 578 579 FnTableEntry = AllocatePool (sizeof(CALLBACK_FN_ENTRY)); 580 ASSERT (FnTableEntry != NULL); 581 582 FnTableEntry->CallbackFn = CallBackFunction; 583 InsertTailList (ListHead, &FnTableEntry->Node); 584 585 return EFI_SUCCESS; 586 } 587 588 /** 589 UnRegister the callback function for a PCD entry. 590 591 This routine will unregister a callback function to a PCD entry by given token number 592 and token space guid. 593 594 @param TokenNumber PCD token's number, it is autogened by build tools. 595 @param Guid PCD token space's guid. 596 if not NULL, this PCD is dynamicEx type PCD. 597 @param CallBackFunction Callback function pointer 598 599 @retval EFI_SUCCESS Callback function is success to be unregister. 600 @retval EFI_INVALID_PARAMETER Can not find the PCD entry by given token number. 601 **/ 602 EFI_STATUS 603 DxeUnRegisterCallBackWorker ( 604 IN UINTN TokenNumber, 605 IN CONST EFI_GUID *Guid, OPTIONAL 606 IN PCD_PROTOCOL_CALLBACK CallBackFunction 607 ) 608 { 609 CALLBACK_FN_ENTRY *FnTableEntry; 610 LIST_ENTRY *ListHead; 611 LIST_ENTRY *ListNode; 612 613 if (Guid != NULL) { 614 TokenNumber = GetExPcdTokenNumber (Guid, (UINT32) TokenNumber); 615 } 616 617 // 618 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 619 // We have to decrement TokenNumber by 1 to make it usable 620 // as the array index of mCallbackFnTable[]. 621 // 622 ListHead = &mCallbackFnTable[TokenNumber - 1]; 623 ListNode = GetFirstNode (ListHead); 624 625 while (ListNode != ListHead) { 626 FnTableEntry = CR_FNENTRY_FROM_LISTNODE(ListNode, CALLBACK_FN_ENTRY, Node); 627 628 if (FnTableEntry->CallbackFn == CallBackFunction) { 629 // 630 // We only allow a Callback function to be register once 631 // for a TokenNumber. So we can safely remove the Node from 632 // the Link List and return EFI_SUCCESS. 633 // 634 RemoveEntryList (ListNode); 635 FreePool (FnTableEntry); 636 637 return EFI_SUCCESS; 638 } 639 ListNode = GetNextNode (ListHead, ListNode); 640 } 641 642 return EFI_INVALID_PARAMETER; 643 } 644 645 /** 646 Get next token number in given token space. 647 648 This routine is used for dynamicEx type PCD. It will firstly scan token space 649 table to get token space according to given token space guid. Then scan given 650 token number in found token space, if found, then return next token number in 651 this token space. 652 653 @param Guid Token space guid. Next token number will be scaned in 654 this token space. 655 @param TokenNumber Token number. 656 If PCD_INVALID_TOKEN_NUMBER, return first token number in 657 token space table. 658 If not PCD_INVALID_TOKEN_NUMBER, return next token number 659 in token space table. 660 @param GuidTable Token space guid table. It will be used for scan token space 661 by given token space guid. 662 @param SizeOfGuidTable The size of guid table. 663 @param ExMapTable DynamicEx token number mapping table. 664 @param SizeOfExMapTable The size of dynamicEx token number mapping table. 665 666 @retval EFI_NOT_FOUND Can not given token space or token number. 667 @retval EFI_SUCCESS Success to get next token number. 668 669 **/ 670 EFI_STATUS 671 ExGetNextTokeNumber ( 672 IN CONST EFI_GUID *Guid, 673 IN OUT UINTN *TokenNumber, 674 IN EFI_GUID *GuidTable, 675 IN UINTN SizeOfGuidTable, 676 IN DYNAMICEX_MAPPING *ExMapTable, 677 IN UINTN SizeOfExMapTable 678 ) 679 { 680 EFI_GUID *MatchGuid; 681 UINTN Index; 682 UINTN GuidTableIdx; 683 BOOLEAN Found; 684 UINTN ExMapTableCount; 685 686 // 687 // Scan token space guid 688 // 689 MatchGuid = ScanGuid (GuidTable, SizeOfGuidTable, Guid); 690 if (MatchGuid == NULL) { 691 return EFI_NOT_FOUND; 692 } 693 694 // 695 // Find the token space table in dynamicEx mapping table. 696 // 697 Found = FALSE; 698 GuidTableIdx = MatchGuid - GuidTable; 699 ExMapTableCount = SizeOfExMapTable / sizeof(ExMapTable[0]); 700 for (Index = 0; Index < ExMapTableCount; Index++) { 701 if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) { 702 Found = TRUE; 703 break; 704 } 705 } 706 707 if (Found) { 708 // 709 // If given token number is PCD_INVALID_TOKEN_NUMBER, then return the first 710 // token number in found token space. 711 // 712 if (*TokenNumber == PCD_INVALID_TOKEN_NUMBER) { 713 *TokenNumber = ExMapTable[Index].ExTokenNumber; 714 return EFI_SUCCESS; 715 } 716 717 for ( ; Index < ExMapTableCount; Index++) { 718 if (ExMapTable[Index].ExTokenNumber == *TokenNumber) { 719 break; 720 } 721 } 722 723 while (Index < ExMapTableCount) { 724 Index++; 725 if (Index == ExMapTableCount) { 726 // 727 // Exceed the length of ExMap Table 728 // 729 *TokenNumber = PCD_INVALID_TOKEN_NUMBER; 730 return EFI_NOT_FOUND; 731 } else if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) { 732 // 733 // Found the next match 734 // 735 *TokenNumber = ExMapTable[Index].ExTokenNumber; 736 return EFI_SUCCESS; 737 } 738 } 739 } 740 741 return EFI_NOT_FOUND; 742 } 743 744 /** 745 Find the PCD database. 746 747 @retval The base address of external PCD database binary. 748 @retval NULL Return NULL if not find. 749 **/ 750 DXE_PCD_DATABASE * 751 LocateExPcdBinary ( 752 VOID 753 ) 754 { 755 DXE_PCD_DATABASE *DxePcdDbBinary; 756 UINTN DxePcdDbSize; 757 EFI_STATUS Status; 758 759 DxePcdDbBinary = NULL; 760 // 761 // Search the External Pcd database from one section of current FFS, 762 // and read it to memory 763 // 764 Status = GetSectionFromFfs ( 765 EFI_SECTION_RAW, 766 0, 767 (VOID **) &DxePcdDbBinary, 768 &DxePcdDbSize 769 ); 770 ASSERT_EFI_ERROR (Status); 771 772 // 773 // Check the first bytes (Header Signature Guid) and build version. 774 // 775 if (!CompareGuid ((VOID *)DxePcdDbBinary, &gPcdDataBaseSignatureGuid) || 776 (DxePcdDbBinary->BuildVersion != PCD_SERVICE_DXE_VERSION)) { 777 ASSERT (FALSE); 778 } 779 780 return DxePcdDbBinary; 781 } 782 783 /** 784 Initialize the PCD database in DXE phase. 785 786 PCD database in DXE phase also contains PCD database in PEI phase which is copied 787 from GUID Hob. 788 789 **/ 790 VOID 791 BuildPcdDxeDataBase ( 792 VOID 793 ) 794 { 795 PEI_PCD_DATABASE *PeiDatabase; 796 EFI_HOB_GUID_TYPE *GuidHob; 797 UINTN Index; 798 UINT32 PcdDxeDbLen; 799 VOID *PcdDxeDb; 800 801 // 802 // Assign PCD Entries with default value to PCD DATABASE 803 // 804 mPcdDatabase.DxeDb = LocateExPcdBinary (); 805 ASSERT(mPcdDatabase.DxeDb != NULL); 806 PcdDxeDbLen = mPcdDatabase.DxeDb->Length + mPcdDatabase.DxeDb->UninitDataBaseSize; 807 PcdDxeDb = AllocateZeroPool (PcdDxeDbLen); 808 ASSERT (PcdDxeDb != NULL); 809 CopyMem (PcdDxeDb, mPcdDatabase.DxeDb, mPcdDatabase.DxeDb->Length); 810 FreePool (mPcdDatabase.DxeDb); 811 mPcdDatabase.DxeDb = PcdDxeDb; 812 813 GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid); 814 if (GuidHob != NULL) { 815 816 // 817 // If no PEIMs use dynamic Pcd Entry, the Pcd Service PEIM 818 // should not be included at all. So the GuidHob could 819 // be NULL. If it is NULL, we just copy over the DXE Default 820 // Value to PCD Database. 821 // 822 823 PeiDatabase = (PEI_PCD_DATABASE *) GET_GUID_HOB_DATA (GuidHob); 824 // 825 // Assign PCD Entries refereneced in PEI phase to PCD DATABASE 826 // 827 mPcdDatabase.PeiDb = PeiDatabase; 828 // 829 // Inherit the SystemSkuId from PEI phase. 830 // 831 mPcdDatabase.DxeDb->SystemSkuId = mPcdDatabase.PeiDb->SystemSkuId; 832 } else { 833 mPcdDatabase.PeiDb = AllocateZeroPool (sizeof (PEI_PCD_DATABASE)); 834 ASSERT(mPcdDatabase.PeiDb != NULL); 835 } 836 837 // 838 // Initialized the external PCD database local variables 839 // 840 mPeiLocalTokenCount = mPcdDatabase.PeiDb->LocalTokenCount; 841 mDxeLocalTokenCount = mPcdDatabase.DxeDb->LocalTokenCount; 842 843 mPeiExMapppingTableSize = mPcdDatabase.PeiDb->ExTokenCount * sizeof (DYNAMICEX_MAPPING); 844 mDxeExMapppingTableSize = mPcdDatabase.DxeDb->ExTokenCount * sizeof (DYNAMICEX_MAPPING); 845 mPeiGuidTableSize = mPcdDatabase.PeiDb->GuidTableCount * sizeof(GUID); 846 mDxeGuidTableSize = mPcdDatabase.DxeDb->GuidTableCount * sizeof (GUID); 847 848 mPcdTotalTokenCount = mPeiLocalTokenCount + mDxeLocalTokenCount; 849 mPeiNexTokenCount = mPeiLocalTokenCount - mPcdDatabase.PeiDb->ExTokenCount; 850 mDxeNexTokenCount = mDxeLocalTokenCount - mPcdDatabase.DxeDb->ExTokenCount; 851 852 mPeiExMapTableEmpty = (mPcdDatabase.PeiDb->ExTokenCount == 0) ? TRUE : FALSE; 853 mDxeExMapTableEmpty = (mPcdDatabase.DxeDb->ExTokenCount == 0) ? TRUE : FALSE; 854 mPeiDatabaseEmpty = (mPeiLocalTokenCount == 0) ? TRUE : FALSE; 855 856 TmpTokenSpaceBufferCount = mPcdDatabase.PeiDb->ExTokenCount + mPcdDatabase.DxeDb->ExTokenCount; 857 TmpTokenSpaceBuffer = (EFI_GUID **)AllocateZeroPool(TmpTokenSpaceBufferCount * sizeof (EFI_GUID *)); 858 859 // 860 // Initialized the Callback Function Table 861 // 862 mCallbackFnTable = AllocateZeroPool (mPcdTotalTokenCount * sizeof (LIST_ENTRY)); 863 ASSERT(mCallbackFnTable != NULL); 864 865 // 866 // EBC compiler is very choosy. It may report warning about comparison 867 // between UINTN and 0 . So we add 1 in each size of the 868 // comparison. 869 // 870 for (Index = 0; Index + 1 < mPcdTotalTokenCount + 1; Index++) { 871 InitializeListHead (&mCallbackFnTable[Index]); 872 } 873 } 874 875 /** 876 Get Variable which contains HII type PCD entry. 877 878 @param VariableGuid Variable's guid 879 @param VariableName Variable's unicode name string 880 @param VariableData Variable's data pointer, 881 @param VariableSize Variable's size. 882 883 @return the status of gRT->GetVariable 884 **/ 885 EFI_STATUS 886 GetHiiVariable ( 887 IN EFI_GUID *VariableGuid, 888 IN UINT16 *VariableName, 889 OUT UINT8 **VariableData, 890 OUT UINTN *VariableSize 891 ) 892 { 893 UINTN Size; 894 EFI_STATUS Status; 895 UINT8 *Buffer; 896 897 Size = 0; 898 Buffer = NULL; 899 900 // 901 // Firstly get the real size of HII variable 902 // 903 Status = gRT->GetVariable ( 904 (UINT16 *)VariableName, 905 VariableGuid, 906 NULL, 907 &Size, 908 Buffer 909 ); 910 911 // 912 // Allocate buffer to hold whole variable data according to variable size. 913 // 914 if (Status == EFI_BUFFER_TOO_SMALL) { 915 Buffer = (UINT8 *) AllocatePool (Size); 916 917 ASSERT (Buffer != NULL); 918 919 Status = gRT->GetVariable ( 920 VariableName, 921 VariableGuid, 922 NULL, 923 &Size, 924 Buffer 925 ); 926 927 ASSERT (Status == EFI_SUCCESS); 928 *VariableData = Buffer; 929 *VariableSize = Size; 930 } else { 931 // 932 // Use Default Data only when variable is not found. 933 // For other error status, correct data can't be got, and trig ASSERT(). 934 // 935 ASSERT (Status == EFI_NOT_FOUND); 936 } 937 938 return Status; 939 } 940 941 /** 942 Find the local token number according to system SKU ID. 943 944 @param LocalTokenNumber PCD token number 945 @param Size The size of PCD entry. 946 @param IsPeiDb If TRUE, the PCD entry is initialized in PEI phase. 947 If False, the PCD entry is initialized in DXE phase. 948 949 @return Token number according to system SKU ID. 950 951 **/ 952 UINT32 953 GetSkuEnabledTokenNumber ( 954 UINT32 LocalTokenNumber, 955 UINTN Size, 956 BOOLEAN IsPeiDb 957 ) 958 { 959 SKU_HEAD *SkuHead; 960 SKU_ID *SkuIdTable; 961 INTN Index; 962 UINT8 *Value; 963 UINT8 *PcdDb; 964 BOOLEAN FoundSku; 965 966 ASSERT ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0); 967 968 PcdDb = IsPeiDb ? (UINT8 *) mPcdDatabase.PeiDb : (UINT8 *) mPcdDatabase.DxeDb; 969 970 SkuHead = (SKU_HEAD *) (PcdDb + (LocalTokenNumber & PCD_DATABASE_OFFSET_MASK)); 971 Value = (UINT8 *) (PcdDb + SkuHead->SkuDataStartOffset); 972 973 SkuIdTable = (SKU_ID *)(PcdDb + SkuHead->SkuIdTableOffset); 974 // 975 // Find the current system's SKU ID entry in SKU ID table. 976 // 977 FoundSku = FALSE; 978 for (Index = 0; Index < SkuIdTable[0]; Index++) { 979 if (mPcdDatabase.DxeDb->SystemSkuId == SkuIdTable[Index + 1]) { 980 FoundSku = TRUE; 981 break; 982 } 983 } 984 985 // 986 // Find the default SKU ID entry in SKU ID table. 987 // 988 989 if(!FoundSku) { 990 for (Index = 0; Index < SkuIdTable[0]; Index++) { 991 if (0 == SkuIdTable[Index + 1]) { 992 break; 993 } 994 } 995 } 996 ASSERT (Index < SkuIdTable[0]); 997 998 switch (LocalTokenNumber & PCD_TYPE_ALL_SET) { 999 case PCD_TYPE_VPD: 1000 Value = (UINT8 *) &(((VPD_HEAD *) Value)[Index]); 1001 return (UINT32) ((Value - PcdDb) | PCD_TYPE_VPD); 1002 1003 case PCD_TYPE_HII: 1004 Value = (UINT8 *) &(((VARIABLE_HEAD *) Value)[Index]); 1005 return (UINT32) ((Value - PcdDb) | PCD_TYPE_HII); 1006 1007 case PCD_TYPE_HII|PCD_TYPE_STRING: 1008 Value = (UINT8 *) &(((VARIABLE_HEAD *) Value)[Index]); 1009 return (UINT32) ((Value - PcdDb) | PCD_TYPE_HII | PCD_TYPE_STRING); 1010 1011 case PCD_TYPE_STRING: 1012 Value = (UINT8 *) &(((STRING_HEAD *) Value)[Index]); 1013 return (UINT32) ((Value - PcdDb) | PCD_TYPE_STRING); 1014 1015 case PCD_TYPE_DATA: 1016 Value += Size * Index; 1017 return (UINT32) ((Value - PcdDb) | PCD_TYPE_DATA); 1018 1019 default: 1020 ASSERT (FALSE); 1021 } 1022 1023 ASSERT (FALSE); 1024 1025 return 0; 1026 1027 } 1028 1029 /** 1030 Invoke the callback function when dynamic PCD entry was set, if this PCD entry 1031 has registered callback function. 1032 1033 @param ExTokenNumber DynamicEx PCD's token number, if this PCD entry is dyanmicEx 1034 type PCD. 1035 @param Guid DynamicEx PCD's guid, if this PCD entry is dynamicEx type 1036 PCD. 1037 @param TokenNumber PCD token number generated by build tools. 1038 @param Data Value want to be set for this PCD entry 1039 @param Size The size of value 1040 1041 **/ 1042 VOID 1043 InvokeCallbackOnSet ( 1044 UINT32 ExTokenNumber, 1045 CONST EFI_GUID *Guid, OPTIONAL 1046 UINTN TokenNumber, 1047 VOID *Data, 1048 UINTN Size 1049 ) 1050 { 1051 CALLBACK_FN_ENTRY *FnTableEntry; 1052 LIST_ENTRY *ListHead; 1053 LIST_ENTRY *ListNode; 1054 1055 // 1056 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 1057 // We have to decrement TokenNumber by 1 to make it usable 1058 // as the array index of mCallbackFnTable[]. 1059 // 1060 ListHead = &mCallbackFnTable[TokenNumber - 1]; 1061 ListNode = GetFirstNode (ListHead); 1062 1063 while (ListNode != ListHead) { 1064 FnTableEntry = CR_FNENTRY_FROM_LISTNODE (ListNode, CALLBACK_FN_ENTRY, Node); 1065 1066 FnTableEntry->CallbackFn(Guid, 1067 (Guid == NULL) ? TokenNumber : ExTokenNumber, 1068 Data, 1069 Size); 1070 1071 ListNode = GetNextNode (ListHead, ListNode); 1072 } 1073 1074 return; 1075 } 1076 1077 1078 /** 1079 Wrapper function for setting non-pointer type value for a PCD entry. 1080 1081 @param TokenNumber Pcd token number autogenerated by build tools. 1082 @param Data Value want to be set for PCD entry 1083 @param Size Size of value. 1084 1085 @return status of SetWorker. 1086 1087 **/ 1088 EFI_STATUS 1089 SetValueWorker ( 1090 IN UINTN TokenNumber, 1091 IN VOID *Data, 1092 IN UINTN Size 1093 ) 1094 { 1095 return SetWorker (TokenNumber, Data, &Size, FALSE); 1096 } 1097 1098 1099 /** 1100 Set value for an PCD entry 1101 1102 @param TokenNumber Pcd token number autogenerated by build tools. 1103 @param Data Value want to be set for PCD entry 1104 @param Size Size of value. 1105 @param PtrType If TRUE, the type of PCD entry's value is Pointer. 1106 If False, the type of PCD entry's value is not Pointer. 1107 1108 @retval EFI_INVALID_PARAMETER If this PCD type is VPD, VPD PCD can not be set. 1109 @retval EFI_INVALID_PARAMETER If Size can not be set to size table. 1110 @retval EFI_INVALID_PARAMETER If Size of non-Ptr type PCD does not match the size information in PCD database. 1111 @retval EFI_NOT_FOUND If value type of PCD entry is intergrate, but not in 1112 range of UINT8, UINT16, UINT32, UINT64 1113 @retval EFI_NOT_FOUND Can not find the PCD type according to token number. 1114 **/ 1115 EFI_STATUS 1116 SetWorker ( 1117 IN UINTN TokenNumber, 1118 IN VOID *Data, 1119 IN OUT UINTN *Size, 1120 IN BOOLEAN PtrType 1121 ) 1122 { 1123 BOOLEAN IsPeiDb; 1124 UINT32 LocalTokenNumber; 1125 EFI_GUID *GuidTable; 1126 UINT8 *StringTable; 1127 EFI_GUID *Guid; 1128 UINT16 *Name; 1129 UINTN VariableOffset; 1130 UINT32 Attributes; 1131 VOID *InternalData; 1132 VARIABLE_HEAD *VariableHead; 1133 UINTN Offset; 1134 UINT8 *PcdDb; 1135 EFI_STATUS Status; 1136 UINTN MaxSize; 1137 UINTN TmpTokenNumber; 1138 1139 // 1140 // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER. 1141 // We have to decrement TokenNumber by 1 to make it usable 1142 // as the array index. 1143 // 1144 TokenNumber--; 1145 1146 TmpTokenNumber = TokenNumber; 1147 1148 // 1149 // EBC compiler is very choosy. It may report warning about comparison 1150 // between UINTN and 0 . So we add 1 in each size of the 1151 // comparison. 1152 // 1153 ASSERT (TokenNumber + 1 < mPcdTotalTokenCount + 1); 1154 1155 if (PtrType) { 1156 // 1157 // Get MaxSize first, then check new size with max buffer size. 1158 // 1159 GetPtrTypeSize (TokenNumber, &MaxSize); 1160 if (*Size > MaxSize) { 1161 *Size = MaxSize; 1162 return EFI_INVALID_PARAMETER; 1163 } 1164 } else { 1165 if (*Size != DxePcdGetSize (TokenNumber + 1)) { 1166 return EFI_INVALID_PARAMETER; 1167 } 1168 } 1169 1170 // 1171 // EBC compiler is very choosy. It may report warning about comparison 1172 // between UINTN and 0 . So we add 1 in each size of the 1173 // comparison. 1174 // 1175 if ((TokenNumber + 1 < mPeiNexTokenCount + 1) || 1176 (TokenNumber + 1 >= mPeiLocalTokenCount + 1 && TokenNumber + 1 < (mPeiLocalTokenCount + mDxeNexTokenCount + 1))) { 1177 InvokeCallbackOnSet (0, NULL, TokenNumber + 1, Data, *Size); 1178 } 1179 1180 // 1181 // Aquire lock to prevent reentrance from TPL_CALLBACK level 1182 // 1183 EfiAcquireLock (&mPcdDatabaseLock); 1184 1185 // 1186 // EBC compiler is very choosy. It may report warning about comparison 1187 // between UINTN and 0 . So we add 1 in each size of the 1188 // comparison. 1189 // 1190 IsPeiDb = (BOOLEAN) ((TokenNumber + 1 < mPeiLocalTokenCount + 1) ? TRUE : FALSE); 1191 1192 LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber + 1); 1193 1194 Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK; 1195 1196 PcdDb = IsPeiDb ? ((UINT8 *) mPcdDatabase.PeiDb) : ((UINT8 *) mPcdDatabase.DxeDb); 1197 1198 if (IsPeiDb) { 1199 StringTable = (UINT8 *) ((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->StringTableOffset); 1200 } else { 1201 StringTable = (UINT8 *) ((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->StringTableOffset); 1202 } 1203 1204 1205 InternalData = PcdDb + Offset; 1206 1207 switch (LocalTokenNumber & PCD_TYPE_ALL_SET) { 1208 case PCD_TYPE_VPD: 1209 ASSERT (FALSE); 1210 Status = EFI_INVALID_PARAMETER; 1211 break; 1212 1213 case PCD_TYPE_STRING: 1214 if (SetPtrTypeSize (TmpTokenNumber, Size)) { 1215 CopyMem (StringTable + *((STRING_HEAD *)InternalData), Data, *Size); 1216 Status = EFI_SUCCESS; 1217 } else { 1218 Status = EFI_INVALID_PARAMETER; 1219 } 1220 break; 1221 1222 case PCD_TYPE_HII|PCD_TYPE_STRING: 1223 case PCD_TYPE_HII: 1224 if (PtrType) { 1225 if (!SetPtrTypeSize (TmpTokenNumber, Size)) { 1226 Status = EFI_INVALID_PARAMETER; 1227 break; 1228 } 1229 } 1230 1231 if (IsPeiDb) { 1232 GuidTable = (EFI_GUID *) ((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset); 1233 } else { 1234 GuidTable = (EFI_GUID *) ((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset); 1235 } 1236 1237 VariableHead = (VARIABLE_HEAD *) (PcdDb + Offset); 1238 1239 Guid = GuidTable + VariableHead->GuidTableIndex; 1240 Name = (UINT16*) (StringTable + VariableHead->StringIndex); 1241 VariableOffset = VariableHead->Offset; 1242 Attributes = VariableHead->Attributes; 1243 Status = SetHiiVariable (Guid, Name, Attributes, Data, *Size, VariableOffset); 1244 break; 1245 1246 case PCD_TYPE_DATA: 1247 if (PtrType) { 1248 if (SetPtrTypeSize (TmpTokenNumber, Size)) { 1249 CopyMem (InternalData, Data, *Size); 1250 Status = EFI_SUCCESS; 1251 } else { 1252 Status = EFI_INVALID_PARAMETER; 1253 } 1254 break; 1255 } 1256 1257 Status = EFI_SUCCESS; 1258 switch (*Size) { 1259 case sizeof(UINT8): 1260 *((UINT8 *) InternalData) = *((UINT8 *) Data); 1261 break; 1262 1263 case sizeof(UINT16): 1264 *((UINT16 *) InternalData) = *((UINT16 *) Data); 1265 break; 1266 1267 case sizeof(UINT32): 1268 *((UINT32 *) InternalData) = *((UINT32 *) Data); 1269 break; 1270 1271 case sizeof(UINT64): 1272 *((UINT64 *) InternalData) = *((UINT64 *) Data); 1273 break; 1274 1275 default: 1276 ASSERT (FALSE); 1277 Status = EFI_NOT_FOUND; 1278 break; 1279 } 1280 break; 1281 1282 default: 1283 ASSERT (FALSE); 1284 Status = EFI_NOT_FOUND; 1285 break; 1286 } 1287 1288 EfiReleaseLock (&mPcdDatabaseLock); 1289 1290 return Status; 1291 } 1292 1293 /** 1294 Wrapper function for get PCD value for dynamic-ex PCD. 1295 1296 @param Guid Token space guid for dynamic-ex PCD. 1297 @param ExTokenNumber Token number for dynamic-ex PCD. 1298 @param GetSize The size of dynamic-ex PCD value. 1299 1300 @return PCD entry in PCD database. 1301 1302 **/ 1303 VOID * 1304 ExGetWorker ( 1305 IN CONST EFI_GUID *Guid, 1306 IN UINTN ExTokenNumber, 1307 IN UINTN GetSize 1308 ) 1309 { 1310 return GetWorker(GetExPcdTokenNumber (Guid, (UINT32) ExTokenNumber), GetSize); 1311 } 1312 1313 /** 1314 Wrapper function for set PCD value for non-Pointer type dynamic-ex PCD. 1315 1316 @param ExTokenNumber Token number for dynamic-ex PCD. 1317 @param Guid Token space guid for dynamic-ex PCD. 1318 @param Data Value want to be set. 1319 @param SetSize The size of value. 1320 1321 @return status of ExSetWorker(). 1322 1323 **/ 1324 EFI_STATUS 1325 ExSetValueWorker ( 1326 IN UINTN ExTokenNumber, 1327 IN CONST EFI_GUID *Guid, 1328 IN VOID *Data, 1329 IN UINTN SetSize 1330 ) 1331 { 1332 return ExSetWorker (ExTokenNumber, Guid, Data, &SetSize, FALSE); 1333 } 1334 1335 /** 1336 Set value for a dynamic-ex PCD entry. 1337 1338 This routine find the local token number according to dynamic-ex PCD's token 1339 space guid and token number firstly, and invoke callback function if this PCD 1340 entry registered callback function. Finally, invoken general SetWorker to set 1341 PCD value. 1342 1343 @param ExTokenNumber Dynamic-ex PCD token number. 1344 @param Guid Token space guid for dynamic-ex PCD. 1345 @param Data PCD value want to be set 1346 @param SetSize Size of value. 1347 @param PtrType If TRUE, this PCD entry is pointer type. 1348 If FALSE, this PCD entry is not pointer type. 1349 1350 @return status of SetWorker(). 1351 1352 **/ 1353 EFI_STATUS 1354 ExSetWorker ( 1355 IN UINTN ExTokenNumber, 1356 IN CONST EFI_GUID *Guid, 1357 IN VOID *Data, 1358 IN OUT UINTN *SetSize, 1359 IN BOOLEAN PtrType 1360 ) 1361 { 1362 UINTN TokenNumber; 1363 1364 TokenNumber = GetExPcdTokenNumber (Guid, (UINT32) ExTokenNumber); 1365 1366 InvokeCallbackOnSet ((UINT32) ExTokenNumber, Guid, TokenNumber, Data, *SetSize); 1367 1368 return SetWorker (TokenNumber, Data, SetSize, PtrType); 1369 1370 } 1371 1372 /** 1373 Set value for HII-type PCD. 1374 1375 A HII-type PCD's value is stored in a variable. Setting/Getting the value of 1376 HII-type PCD is to visit this variable. 1377 1378 @param VariableGuid Guid of variable which stored value of a HII-type PCD. 1379 @param VariableName Unicode name of variable which stored value of a HII-type PCD. 1380 @param SetAttributes Attributes bitmask to set for the variable. 1381 @param Data Value want to be set. 1382 @param DataSize Size of value 1383 @param Offset Value offset of HII-type PCD in variable. 1384 1385 @return status of GetVariable()/SetVariable(). 1386 1387 **/ 1388 EFI_STATUS 1389 SetHiiVariable ( 1390 IN EFI_GUID *VariableGuid, 1391 IN UINT16 *VariableName, 1392 IN UINT32 SetAttributes, 1393 IN CONST VOID *Data, 1394 IN UINTN DataSize, 1395 IN UINTN Offset 1396 ) 1397 { 1398 UINTN Size; 1399 VOID *Buffer; 1400 EFI_STATUS Status; 1401 UINT32 Attribute; 1402 UINTN SetSize; 1403 1404 Size = 0; 1405 SetSize = 0; 1406 1407 // 1408 // Try to get original variable size information. 1409 // 1410 Status = gRT->GetVariable ( 1411 (UINT16 *)VariableName, 1412 VariableGuid, 1413 NULL, 1414 &Size, 1415 NULL 1416 ); 1417 1418 if (Status == EFI_BUFFER_TOO_SMALL) { 1419 // 1420 // Patch new PCD's value to offset in given HII variable. 1421 // 1422 if (Size >= (DataSize + Offset)) { 1423 SetSize = Size; 1424 } else { 1425 SetSize = DataSize + Offset; 1426 } 1427 Buffer = AllocatePool (SetSize); 1428 ASSERT (Buffer != NULL); 1429 1430 Status = gRT->GetVariable ( 1431 VariableName, 1432 VariableGuid, 1433 &Attribute, 1434 &Size, 1435 Buffer 1436 ); 1437 1438 ASSERT_EFI_ERROR (Status); 1439 1440 CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize); 1441 1442 if (SetAttributes == 0) { 1443 SetAttributes = Attribute; 1444 } 1445 1446 Status = gRT->SetVariable ( 1447 VariableName, 1448 VariableGuid, 1449 SetAttributes, 1450 SetSize, 1451 Buffer 1452 ); 1453 1454 FreePool (Buffer); 1455 return Status; 1456 } else if (Status == EFI_NOT_FOUND) { 1457 // 1458 // If variable does not exist, a new variable need to be created. 1459 // 1460 1461 Size = Offset + DataSize; 1462 1463 Buffer = AllocateZeroPool (Size); 1464 ASSERT (Buffer != NULL); 1465 1466 CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize); 1467 1468 if (SetAttributes == 0) { 1469 SetAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE; 1470 } 1471 1472 Status = gRT->SetVariable ( 1473 VariableName, 1474 VariableGuid, 1475 SetAttributes, 1476 Size, 1477 Buffer 1478 ); 1479 1480 FreePool (Buffer); 1481 return Status; 1482 } 1483 1484 // 1485 // If we drop to here, the value is failed to be written in to variable area. 1486 // 1487 return Status; 1488 } 1489 1490 /** 1491 Get Token Number according to dynamic-ex PCD's {token space guid:token number} 1492 1493 A dynamic-ex type PCD, developer must provide pair of token space guid: token number 1494 in DEC file. PCD database maintain a mapping table that translate pair of {token 1495 space guid: token number} to Token Number. 1496 1497 @param Guid Token space guid for dynamic-ex PCD entry. 1498 @param ExTokenNumber Dynamic-ex PCD token number. 1499 1500 @return Token Number for dynamic-ex PCD. 1501 1502 **/ 1503 UINTN 1504 GetExPcdTokenNumber ( 1505 IN CONST EFI_GUID *Guid, 1506 IN UINT32 ExTokenNumber 1507 ) 1508 { 1509 UINT32 Index; 1510 DYNAMICEX_MAPPING *ExMap; 1511 EFI_GUID *GuidTable; 1512 EFI_GUID *MatchGuid; 1513 UINTN MatchGuidIdx; 1514 1515 if (!mPeiDatabaseEmpty) { 1516 ExMap = (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->ExMapTableOffset); 1517 GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset); 1518 1519 MatchGuid = ScanGuid (GuidTable, mPeiGuidTableSize, Guid); 1520 1521 if (MatchGuid != NULL) { 1522 1523 MatchGuidIdx = MatchGuid - GuidTable; 1524 1525 for (Index = 0; Index < mPcdDatabase.PeiDb->ExTokenCount; Index++) { 1526 if ((ExTokenNumber == ExMap[Index].ExTokenNumber) && 1527 (MatchGuidIdx == ExMap[Index].ExGuidIndex)) { 1528 return ExMap[Index].TokenNumber; 1529 } 1530 } 1531 } 1532 } 1533 1534 ExMap = (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->ExMapTableOffset); 1535 GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset); 1536 1537 MatchGuid = ScanGuid (GuidTable, mDxeGuidTableSize, Guid); 1538 // 1539 // We need to ASSERT here. If GUID can't be found in GuidTable, this is a 1540 // error in the BUILD system. 1541 // 1542 ASSERT (MatchGuid != NULL); 1543 1544 MatchGuidIdx = MatchGuid - GuidTable; 1545 1546 for (Index = 0; Index < mPcdDatabase.DxeDb->ExTokenCount; Index++) { 1547 if ((ExTokenNumber == ExMap[Index].ExTokenNumber) && 1548 (MatchGuidIdx == ExMap[Index].ExGuidIndex)) { 1549 return ExMap[Index].TokenNumber; 1550 } 1551 } 1552 1553 ASSERT (FALSE); 1554 1555 return 0; 1556 } 1557 1558 /** 1559 Get SKU ID table from PCD database. 1560 1561 @param LocalTokenNumberTableIdx Index of local token number in token number table. 1562 @param IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 1563 If FALSE, the pcd entry is initialized in DXE phase. 1564 @return Pointer to SKU ID array table 1565 1566 **/ 1567 SKU_ID * 1568 GetSkuIdArray ( 1569 IN UINTN LocalTokenNumberTableIdx, 1570 IN BOOLEAN IsPeiDb 1571 ) 1572 { 1573 SKU_HEAD *SkuHead; 1574 UINTN LocalTokenNumber; 1575 UINT8 *Database; 1576 1577 if (IsPeiDb) { 1578 LocalTokenNumber = *((UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset) + LocalTokenNumberTableIdx); 1579 Database = (UINT8 *) mPcdDatabase.PeiDb; 1580 } else { 1581 LocalTokenNumber = *((UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset) + LocalTokenNumberTableIdx); 1582 Database = (UINT8 *) mPcdDatabase.DxeDb; 1583 } 1584 1585 ASSERT ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) != 0); 1586 1587 SkuHead = (SKU_HEAD *) ((UINT8 *)Database + (LocalTokenNumber & PCD_DATABASE_OFFSET_MASK)); 1588 1589 return (SKU_ID *) (Database + SkuHead->SkuIdTableOffset); 1590 1591 } 1592 1593 /** 1594 Wrapper function of getting index of PCD entry in size table. 1595 1596 @param LocalTokenNumberTableIdx Index of this PCD in local token number table. 1597 @param IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 1598 If FALSE, the pcd entry is initialized in DXE phase. 1599 1600 @return index of PCD entry in size table. 1601 **/ 1602 UINTN 1603 GetSizeTableIndex ( 1604 IN UINTN LocalTokenNumberTableIdx, 1605 IN BOOLEAN IsPeiDb 1606 ) 1607 { 1608 UINT32 *LocalTokenNumberTable; 1609 UINTN LocalTokenNumber; 1610 UINTN Index; 1611 UINTN SizeTableIdx; 1612 SKU_ID *SkuIdTable; 1613 1614 if (IsPeiDb) { 1615 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset); 1616 } else { 1617 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset); 1618 } 1619 1620 SizeTableIdx = 0; 1621 1622 for (Index = 0; Index < LocalTokenNumberTableIdx; Index ++) { 1623 LocalTokenNumber = LocalTokenNumberTable[Index]; 1624 1625 if ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER) { 1626 // 1627 // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type 1628 // PCD entry. 1629 // 1630 if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) { 1631 // 1632 // We have only two entry for VPD enabled PCD entry: 1633 // 1) MAX Size. 1634 // 2) Current Size 1635 // Current size is equal to MAX size. 1636 // 1637 SizeTableIdx += 2; 1638 } else { 1639 if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) { 1640 // 1641 // We have only two entry for Non-Sku enabled PCD entry: 1642 // 1) MAX SIZE 1643 // 2) Current Size 1644 // 1645 SizeTableIdx += 2; 1646 } else { 1647 // 1648 // We have these entry for SKU enabled PCD entry 1649 // 1) MAX SIZE 1650 // 2) Current Size for each SKU_ID (It is equal to MaxSku). 1651 // 1652 SkuIdTable = GetSkuIdArray (Index, IsPeiDb); 1653 SizeTableIdx += (UINTN)*SkuIdTable + 1; 1654 } 1655 } 1656 } 1657 1658 } 1659 1660 return SizeTableIdx; 1661 } 1662 1663 /** 1664 Get size of POINTER type PCD value. 1665 1666 @param LocalTokenNumberTableIdx Index of local token number in local token number table. 1667 @param MaxSize Maxmium size of POINTER type PCD value. 1668 1669 @return size of POINTER type PCD value. 1670 1671 **/ 1672 UINTN 1673 GetPtrTypeSize ( 1674 IN UINTN LocalTokenNumberTableIdx, 1675 OUT UINTN *MaxSize 1676 ) 1677 { 1678 INTN SizeTableIdx; 1679 UINTN LocalTokenNumber; 1680 SKU_ID *SkuIdTable; 1681 SIZE_INFO *SizeTable; 1682 UINTN Index; 1683 BOOLEAN IsPeiDb; 1684 UINT32 *LocalTokenNumberTable; 1685 1686 // EBC compiler is very choosy. It may report warning about comparison 1687 // between UINTN and 0 . So we add 1 in each size of the 1688 // comparison. 1689 IsPeiDb = (BOOLEAN) (LocalTokenNumberTableIdx + 1 < mPeiLocalTokenCount + 1); 1690 1691 1692 if (IsPeiDb) { 1693 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset); 1694 SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->SizeTableOffset); 1695 } else { 1696 LocalTokenNumberTableIdx -= mPeiLocalTokenCount; 1697 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset); 1698 SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->SizeTableOffset); 1699 } 1700 1701 LocalTokenNumber = LocalTokenNumberTable[LocalTokenNumberTableIdx]; 1702 1703 ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER); 1704 1705 SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, IsPeiDb); 1706 1707 *MaxSize = SizeTable[SizeTableIdx]; 1708 // 1709 // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type 1710 // PCD entry. 1711 // 1712 if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) { 1713 // 1714 // We have only two entry for VPD enabled PCD entry: 1715 // 1) MAX Size. 1716 // 2) Current Size 1717 // We consider current size is equal to MAX size. 1718 // 1719 return *MaxSize; 1720 } else { 1721 if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) { 1722 // 1723 // We have only two entry for Non-Sku enabled PCD entry: 1724 // 1) MAX SIZE 1725 // 2) Current Size 1726 // 1727 return SizeTable[SizeTableIdx + 1]; 1728 } else { 1729 // 1730 // We have these entry for SKU enabled PCD entry 1731 // 1) MAX SIZE 1732 // 2) Current Size for each SKU_ID (It is equal to MaxSku). 1733 // 1734 SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, IsPeiDb); 1735 for (Index = 0; Index < SkuIdTable[0]; Index++) { 1736 if (SkuIdTable[1 + Index] == mPcdDatabase.DxeDb->SystemSkuId) { 1737 return SizeTable[SizeTableIdx + 1 + Index]; 1738 } 1739 } 1740 return SizeTable[SizeTableIdx + 1]; 1741 } 1742 } 1743 } 1744 1745 /** 1746 Set size of POINTER type PCD value. The size should not exceed the maximum size 1747 of this PCD value. 1748 1749 @param LocalTokenNumberTableIdx Index of local token number in local token number table. 1750 @param CurrentSize Size of POINTER type PCD value. 1751 1752 @retval TRUE Success to set size of PCD value. 1753 @retval FALSE Fail to set size of PCD value. 1754 **/ 1755 BOOLEAN 1756 SetPtrTypeSize ( 1757 IN UINTN LocalTokenNumberTableIdx, 1758 IN OUT UINTN *CurrentSize 1759 ) 1760 { 1761 INTN SizeTableIdx; 1762 UINTN LocalTokenNumber; 1763 SKU_ID *SkuIdTable; 1764 SIZE_INFO *SizeTable; 1765 UINTN Index; 1766 UINTN MaxSize; 1767 BOOLEAN IsPeiDb; 1768 UINT32 *LocalTokenNumberTable; 1769 1770 // 1771 // EBC compiler is very choosy. It may report warning about comparison 1772 // between UINTN and 0 . So we add 1 in each size of the 1773 // comparison. 1774 // 1775 IsPeiDb = (BOOLEAN) (LocalTokenNumberTableIdx + 1 < mPeiLocalTokenCount + 1); 1776 1777 if (IsPeiDb) { 1778 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset); 1779 SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->SizeTableOffset); 1780 } else { 1781 LocalTokenNumberTableIdx -= mPeiLocalTokenCount; 1782 LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset); 1783 SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->SizeTableOffset); 1784 } 1785 1786 LocalTokenNumber = LocalTokenNumberTable[LocalTokenNumberTableIdx]; 1787 1788 ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER); 1789 1790 SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, IsPeiDb); 1791 1792 MaxSize = SizeTable[SizeTableIdx]; 1793 // 1794 // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type 1795 // PCD entry. 1796 // 1797 if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) { 1798 // 1799 // We shouldn't come here as we don't support SET for VPD 1800 // 1801 ASSERT (FALSE); 1802 return FALSE; 1803 } else { 1804 if ((*CurrentSize > MaxSize) || 1805 (*CurrentSize == MAX_ADDRESS)) { 1806 *CurrentSize = MaxSize; 1807 return FALSE; 1808 } 1809 1810 if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) { 1811 // 1812 // We have only two entry for Non-Sku enabled PCD entry: 1813 // 1) MAX SIZE 1814 // 2) Current Size 1815 // 1816 SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize; 1817 return TRUE; 1818 } else { 1819 // 1820 // We have these entry for SKU enabled PCD entry 1821 // 1) MAX SIZE 1822 // 2) Current Size for each SKU_ID (It is equal to MaxSku). 1823 // 1824 SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, IsPeiDb); 1825 for (Index = 0; Index < SkuIdTable[0]; Index++) { 1826 if (SkuIdTable[1 + Index] == mPcdDatabase.DxeDb->SystemSkuId) { 1827 SizeTable[SizeTableIdx + 1 + Index] = (SIZE_INFO) *CurrentSize; 1828 return TRUE; 1829 } 1830 } 1831 SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize; 1832 return TRUE; 1833 } 1834 } 1835 } 1836 1837 /** 1838 VariableLock DynamicHiiPcd. 1839 1840 @param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase, 1841 If FALSE, the pcd entry is initialized in DXE phase. 1842 @param[in] VariableLock Pointer to VariableLockProtocol. 1843 1844 **/ 1845 VOID 1846 VariableLockDynamicHiiPcd ( 1847 IN BOOLEAN IsPeiDb, 1848 IN EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock 1849 ) 1850 { 1851 EFI_STATUS Status; 1852 PCD_DATABASE_INIT *Database; 1853 UINT32 LocalTokenCount; 1854 UINTN TokenNumber; 1855 UINT32 LocalTokenNumber; 1856 UINTN Offset; 1857 EFI_GUID *GuidTable; 1858 UINT8 *StringTable; 1859 VARIABLE_HEAD *VariableHead; 1860 EFI_GUID *Guid; 1861 UINT16 *Name; 1862 1863 Database = IsPeiDb ? mPcdDatabase.PeiDb: mPcdDatabase.DxeDb; 1864 LocalTokenCount = IsPeiDb ? mPeiLocalTokenCount: mDxeLocalTokenCount; 1865 1866 // 1867 // Go through PCD database to find out DynamicHii PCDs. 1868 // 1869 for (TokenNumber = 1; TokenNumber <= LocalTokenCount; TokenNumber++) { 1870 if (IsPeiDb) { 1871 LocalTokenNumber = GetLocalTokenNumber (TRUE, TokenNumber); 1872 } else { 1873 LocalTokenNumber = GetLocalTokenNumber (FALSE, TokenNumber + mPeiLocalTokenCount); 1874 } 1875 if ((LocalTokenNumber & PCD_TYPE_HII) != 0) { 1876 Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK; 1877 VariableHead = (VARIABLE_HEAD *) ((UINT8 *) Database + Offset); 1878 // 1879 // Why not to set property by VarCheckProtocol with Attributes and Property directly here? 1880 // It is because that set property by VarCheckProtocol will indicate the variable to 1881 // be a system variable, but the unknown max size of the variable is dangerous to 1882 // the system variable region. 1883 // 1884 if ((VariableHead->Property & VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY) != 0) { 1885 // 1886 // DynamicHii PCD with RO property set in *.dsc. 1887 // 1888 StringTable = (UINT8 *) ((UINT8 *) Database + Database->StringTableOffset); 1889 GuidTable = (EFI_GUID *) ((UINT8 *) Database + Database->GuidTableOffset); 1890 Guid = GuidTable + VariableHead->GuidTableIndex; 1891 Name = (UINT16*) (StringTable + VariableHead->StringIndex); 1892 Status = VariableLock->RequestToLock (VariableLock, Name, Guid); 1893 ASSERT_EFI_ERROR (Status); 1894 } 1895 } 1896 } 1897 } 1898 1899 /** 1900 VariableLockProtocol callback 1901 to lock the variables referenced by DynamicHii PCDs with RO property set in *.dsc. 1902 1903 @param[in] Event Event whose notification function is being invoked. 1904 @param[in] Context Pointer to the notification function's context. 1905 1906 **/ 1907 VOID 1908 EFIAPI 1909 VariableLockCallBack ( 1910 IN EFI_EVENT Event, 1911 IN VOID *Context 1912 ) 1913 { 1914 EFI_STATUS Status; 1915 EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock; 1916 1917 Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **) &VariableLock); 1918 if (!EFI_ERROR (Status)) { 1919 VariableLockDynamicHiiPcd (TRUE, VariableLock); 1920 VariableLockDynamicHiiPcd (FALSE, VariableLock); 1921 } 1922 } 1923 1924
