2 The common variable operation routines shared by DXE_RUNTIME variable
3 module and DXE_SMM variable module.
5 Caution: This module requires additional review when modified.
6 This driver will have external input - variable data. They may be input in SMM mode.
7 This external input must be validated carefully to avoid security issue like
8 buffer overflow, integer overflow.
10 VariableServiceGetNextVariableName () and VariableServiceQueryVariableInfo() are external API.
11 They need check input parameter.
13 VariableServiceGetVariable() and VariableServiceSetVariable() are external API
14 to receive datasize and data buffer. The size should be checked carefully.
16 VariableServiceSetVariable() should also check authenticate data to avoid buffer overflow,
17 integer overflow. It should also check attribute to avoid authentication bypass.
19 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
20 (C) Copyright 2015-2018 Hewlett Packard Enterprise Development LP<BR>
21 This program and the accompanying materials
22 are licensed and made available under the terms and conditions of the BSD License
23 which accompanies this distribution. The full text of the license may be found at
24 http://opensource.org/licenses/bsd-license.php
26 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
27 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
33 VARIABLE_MODULE_GLOBAL
*mVariableModuleGlobal
;
36 /// Define a memory cache that improves the search performance for a variable.
38 VARIABLE_STORE_HEADER
*mNvVariableCache
= NULL
;
41 /// Memory cache of Fv Header.
43 EFI_FIRMWARE_VOLUME_HEADER
*mNvFvHeaderCache
= NULL
;
46 /// The memory entry used for variable statistics data.
48 VARIABLE_INFO_ENTRY
*gVariableInfo
= NULL
;
51 /// The flag to indicate whether the platform has left the DXE phase of execution.
53 BOOLEAN mEndOfDxe
= FALSE
;
56 /// It indicates the var check request source.
57 /// In the implementation, DXE is regarded as untrusted, and SMM is trusted.
59 VAR_CHECK_REQUEST_SOURCE mRequestSource
= VarCheckFromUntrusted
;
62 // It will record the current boot error flag before EndOfDxe.
64 VAR_ERROR_FLAG mCurrentBootVarErrFlag
= VAR_ERROR_FLAG_NO_ERROR
;
66 VARIABLE_ENTRY_PROPERTY mVariableEntryProperty
[] = {
68 &gEdkiiVarErrorFlagGuid
,
71 VAR_CHECK_VARIABLE_PROPERTY_REVISION
,
72 VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY
,
73 VARIABLE_ATTRIBUTE_NV_BS_RT
,
74 sizeof (VAR_ERROR_FLAG
),
75 sizeof (VAR_ERROR_FLAG
)
80 AUTH_VAR_LIB_CONTEXT_IN mAuthContextIn
= {
81 AUTH_VAR_LIB_CONTEXT_IN_STRUCT_VERSION
,
83 // StructSize, TO BE FILLED
87 // MaxAuthVariableSize, TO BE FILLED
90 VariableExLibFindVariable
,
91 VariableExLibFindNextVariable
,
92 VariableExLibUpdateVariable
,
93 VariableExLibGetScratchBuffer
,
94 VariableExLibCheckRemainingSpaceForConsistency
,
95 VariableExLibAtRuntime
,
98 AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut
;
101 Routine used to track statistical information about variable usage.
102 The data is stored in the EFI system table so it can be accessed later.
103 VariableInfo.efi can dump out the table. Only Boot Services variable
104 accesses are tracked by this code. The PcdVariableCollectStatistics
105 build flag controls if this feature is enabled.
107 A read that hits in the cache will have Read and Cache true for
108 the transaction. Data is allocated by this routine, but never
111 @param[in] VariableName Name of the Variable to track.
112 @param[in] VendorGuid Guid of the Variable to track.
113 @param[in] Volatile TRUE if volatile FALSE if non-volatile.
114 @param[in] Read TRUE if GetVariable() was called.
115 @param[in] Write TRUE if SetVariable() was called.
116 @param[in] Delete TRUE if deleted via SetVariable().
117 @param[in] Cache TRUE for a cache hit.
122 IN CHAR16
*VariableName
,
123 IN EFI_GUID
*VendorGuid
,
131 VARIABLE_INFO_ENTRY
*Entry
;
133 if (FeaturePcdGet (PcdVariableCollectStatistics
)) {
136 // Don't collect statistics at runtime.
140 if (gVariableInfo
== NULL
) {
142 // On the first call allocate a entry and place a pointer to it in
143 // the EFI System Table.
145 gVariableInfo
= AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY
));
146 ASSERT (gVariableInfo
!= NULL
);
148 CopyGuid (&gVariableInfo
->VendorGuid
, VendorGuid
);
149 gVariableInfo
->Name
= AllocateZeroPool (StrSize (VariableName
));
150 ASSERT (gVariableInfo
->Name
!= NULL
);
151 StrCpyS (gVariableInfo
->Name
, StrSize(VariableName
)/sizeof(CHAR16
), VariableName
);
152 gVariableInfo
->Volatile
= Volatile
;
156 for (Entry
= gVariableInfo
; Entry
!= NULL
; Entry
= Entry
->Next
) {
157 if (CompareGuid (VendorGuid
, &Entry
->VendorGuid
)) {
158 if (StrCmp (VariableName
, Entry
->Name
) == 0) {
166 Entry
->DeleteCount
++;
176 if (Entry
->Next
== NULL
) {
178 // If the entry is not in the table add it.
179 // Next iteration of the loop will fill in the data.
181 Entry
->Next
= AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY
));
182 ASSERT (Entry
->Next
!= NULL
);
184 CopyGuid (&Entry
->Next
->VendorGuid
, VendorGuid
);
185 Entry
->Next
->Name
= AllocateZeroPool (StrSize (VariableName
));
186 ASSERT (Entry
->Next
->Name
!= NULL
);
187 StrCpyS (Entry
->Next
->Name
, StrSize(VariableName
)/sizeof(CHAR16
), VariableName
);
188 Entry
->Next
->Volatile
= Volatile
;
198 This code checks if variable header is valid or not.
200 @param Variable Pointer to the Variable Header.
201 @param VariableStoreEnd Pointer to the Variable Store End.
203 @retval TRUE Variable header is valid.
204 @retval FALSE Variable header is not valid.
208 IsValidVariableHeader (
209 IN VARIABLE_HEADER
*Variable
,
210 IN VARIABLE_HEADER
*VariableStoreEnd
213 if ((Variable
== NULL
) || (Variable
>= VariableStoreEnd
) || (Variable
->StartId
!= VARIABLE_DATA
)) {
215 // Variable is NULL or has reached the end of variable store,
216 // or the StartId is not correct.
227 This function writes data to the FWH at the correct LBA even if the LBAs
230 @param Global Pointer to VARAIBLE_GLOBAL structure.
231 @param Volatile Point out the Variable is Volatile or Non-Volatile.
232 @param SetByIndex TRUE if target pointer is given as index.
233 FALSE if target pointer is absolute.
234 @param Fvb Pointer to the writable FVB protocol.
235 @param DataPtrIndex Pointer to the Data from the end of VARIABLE_STORE_HEADER
237 @param DataSize Size of data to be written.
238 @param Buffer Pointer to the buffer from which data is written.
240 @retval EFI_INVALID_PARAMETER Parameters not valid.
241 @retval EFI_UNSUPPORTED Fvb is a NULL for Non-Volatile variable update.
242 @retval EFI_OUT_OF_RESOURCES The remaining size is not enough.
243 @retval EFI_SUCCESS Variable store successfully updated.
247 UpdateVariableStore (
248 IN VARIABLE_GLOBAL
*Global
,
250 IN BOOLEAN SetByIndex
,
251 IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL
*Fvb
,
252 IN UINTN DataPtrIndex
,
257 EFI_FV_BLOCK_MAP_ENTRY
*PtrBlockMapEntry
;
265 EFI_FIRMWARE_VOLUME_HEADER
*FwVolHeader
;
266 VARIABLE_STORE_HEADER
*VolatileBase
;
267 EFI_PHYSICAL_ADDRESS FvVolHdr
;
268 EFI_PHYSICAL_ADDRESS DataPtr
;
272 DataPtr
= DataPtrIndex
;
275 // Check if the Data is Volatile.
279 return EFI_UNSUPPORTED
;
281 Status
= Fvb
->GetPhysicalAddress(Fvb
, &FvVolHdr
);
282 ASSERT_EFI_ERROR (Status
);
284 FwVolHeader
= (EFI_FIRMWARE_VOLUME_HEADER
*) ((UINTN
) FvVolHdr
);
286 // Data Pointer should point to the actual Address where data is to be
290 DataPtr
+= mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
;
293 if ((DataPtr
+ DataSize
) > ((EFI_PHYSICAL_ADDRESS
) (UINTN
) ((UINT8
*) FwVolHeader
+ FwVolHeader
->FvLength
))) {
294 return EFI_OUT_OF_RESOURCES
;
298 // Data Pointer should point to the actual Address where data is to be
301 VolatileBase
= (VARIABLE_STORE_HEADER
*) ((UINTN
) mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
);
303 DataPtr
+= mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
;
306 if ((DataPtr
+ DataSize
) > ((UINTN
) ((UINT8
*) VolatileBase
+ VolatileBase
->Size
))) {
307 return EFI_OUT_OF_RESOURCES
;
311 // If Volatile Variable just do a simple mem copy.
313 CopyMem ((UINT8
*)(UINTN
)DataPtr
, Buffer
, DataSize
);
318 // If we are here we are dealing with Non-Volatile Variables.
320 LinearOffset
= (UINTN
) FwVolHeader
;
321 CurrWritePtr
= (UINTN
) DataPtr
;
322 CurrWriteSize
= DataSize
;
326 if (CurrWritePtr
< LinearOffset
) {
327 return EFI_INVALID_PARAMETER
;
330 for (PtrBlockMapEntry
= mNvFvHeaderCache
->BlockMap
; PtrBlockMapEntry
->NumBlocks
!= 0; PtrBlockMapEntry
++) {
331 for (BlockIndex2
= 0; BlockIndex2
< PtrBlockMapEntry
->NumBlocks
; BlockIndex2
++) {
333 // Check to see if the Variable Writes are spanning through multiple
336 if ((CurrWritePtr
>= LinearOffset
) && (CurrWritePtr
< LinearOffset
+ PtrBlockMapEntry
->Length
)) {
337 if ((CurrWritePtr
+ CurrWriteSize
) <= (LinearOffset
+ PtrBlockMapEntry
->Length
)) {
338 Status
= Fvb
->Write (
341 (UINTN
) (CurrWritePtr
- LinearOffset
),
347 Size
= (UINT32
) (LinearOffset
+ PtrBlockMapEntry
->Length
- CurrWritePtr
);
348 Status
= Fvb
->Write (
351 (UINTN
) (CurrWritePtr
- LinearOffset
),
355 if (EFI_ERROR (Status
)) {
359 CurrWritePtr
= LinearOffset
+ PtrBlockMapEntry
->Length
;
360 CurrBuffer
= CurrBuffer
+ Size
;
361 CurrWriteSize
= CurrWriteSize
- Size
;
365 LinearOffset
+= PtrBlockMapEntry
->Length
;
376 This code gets the current status of Variable Store.
378 @param VarStoreHeader Pointer to the Variable Store Header.
380 @retval EfiRaw Variable store status is raw.
381 @retval EfiValid Variable store status is valid.
382 @retval EfiInvalid Variable store status is invalid.
385 VARIABLE_STORE_STATUS
386 GetVariableStoreStatus (
387 IN VARIABLE_STORE_HEADER
*VarStoreHeader
390 if ((CompareGuid (&VarStoreHeader
->Signature
, &gEfiAuthenticatedVariableGuid
) ||
391 CompareGuid (&VarStoreHeader
->Signature
, &gEfiVariableGuid
)) &&
392 VarStoreHeader
->Format
== VARIABLE_STORE_FORMATTED
&&
393 VarStoreHeader
->State
== VARIABLE_STORE_HEALTHY
397 } else if (((UINT32
*)(&VarStoreHeader
->Signature
))[0] == 0xffffffff &&
398 ((UINT32
*)(&VarStoreHeader
->Signature
))[1] == 0xffffffff &&
399 ((UINT32
*)(&VarStoreHeader
->Signature
))[2] == 0xffffffff &&
400 ((UINT32
*)(&VarStoreHeader
->Signature
))[3] == 0xffffffff &&
401 VarStoreHeader
->Size
== 0xffffffff &&
402 VarStoreHeader
->Format
== 0xff &&
403 VarStoreHeader
->State
== 0xff
413 This code gets the size of variable header.
415 @return Size of variable header in bytes in type UINTN.
419 GetVariableHeaderSize (
425 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
426 Value
= sizeof (AUTHENTICATED_VARIABLE_HEADER
);
428 Value
= sizeof (VARIABLE_HEADER
);
436 This code gets the size of name of variable.
438 @param Variable Pointer to the Variable Header.
440 @return UINTN Size of variable in bytes.
445 IN VARIABLE_HEADER
*Variable
448 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
450 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) Variable
;
451 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
452 if (AuthVariable
->State
== (UINT8
) (-1) ||
453 AuthVariable
->DataSize
== (UINT32
) (-1) ||
454 AuthVariable
->NameSize
== (UINT32
) (-1) ||
455 AuthVariable
->Attributes
== (UINT32
) (-1)) {
458 return (UINTN
) AuthVariable
->NameSize
;
460 if (Variable
->State
== (UINT8
) (-1) ||
461 Variable
->DataSize
== (UINT32
) (-1) ||
462 Variable
->NameSize
== (UINT32
) (-1) ||
463 Variable
->Attributes
== (UINT32
) (-1)) {
466 return (UINTN
) Variable
->NameSize
;
471 This code sets the size of name of variable.
473 @param[in] Variable Pointer to the Variable Header.
474 @param[in] NameSize Name size to set.
478 SetNameSizeOfVariable (
479 IN VARIABLE_HEADER
*Variable
,
483 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
485 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) Variable
;
486 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
487 AuthVariable
->NameSize
= (UINT32
) NameSize
;
489 Variable
->NameSize
= (UINT32
) NameSize
;
495 This code gets the size of variable data.
497 @param Variable Pointer to the Variable Header.
499 @return Size of variable in bytes.
504 IN VARIABLE_HEADER
*Variable
507 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
509 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) Variable
;
510 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
511 if (AuthVariable
->State
== (UINT8
) (-1) ||
512 AuthVariable
->DataSize
== (UINT32
) (-1) ||
513 AuthVariable
->NameSize
== (UINT32
) (-1) ||
514 AuthVariable
->Attributes
== (UINT32
) (-1)) {
517 return (UINTN
) AuthVariable
->DataSize
;
519 if (Variable
->State
== (UINT8
) (-1) ||
520 Variable
->DataSize
== (UINT32
) (-1) ||
521 Variable
->NameSize
== (UINT32
) (-1) ||
522 Variable
->Attributes
== (UINT32
) (-1)) {
525 return (UINTN
) Variable
->DataSize
;
530 This code sets the size of variable data.
532 @param[in] Variable Pointer to the Variable Header.
533 @param[in] DataSize Data size to set.
537 SetDataSizeOfVariable (
538 IN VARIABLE_HEADER
*Variable
,
542 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
544 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) Variable
;
545 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
546 AuthVariable
->DataSize
= (UINT32
) DataSize
;
548 Variable
->DataSize
= (UINT32
) DataSize
;
554 This code gets the pointer to the variable name.
556 @param Variable Pointer to the Variable Header.
558 @return Pointer to Variable Name which is Unicode encoding.
563 IN VARIABLE_HEADER
*Variable
566 return (CHAR16
*) ((UINTN
) Variable
+ GetVariableHeaderSize ());
570 This code gets the pointer to the variable guid.
572 @param Variable Pointer to the Variable Header.
574 @return A EFI_GUID* pointer to Vendor Guid.
579 IN VARIABLE_HEADER
*Variable
582 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
584 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) Variable
;
585 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
586 return &AuthVariable
->VendorGuid
;
588 return &Variable
->VendorGuid
;
594 This code gets the pointer to the variable data.
596 @param Variable Pointer to the Variable Header.
598 @return Pointer to Variable Data.
603 IN VARIABLE_HEADER
*Variable
609 // Be careful about pad size for alignment.
611 Value
= (UINTN
) GetVariableNamePtr (Variable
);
612 Value
+= NameSizeOfVariable (Variable
);
613 Value
+= GET_PAD_SIZE (NameSizeOfVariable (Variable
));
615 return (UINT8
*) Value
;
619 This code gets the variable data offset related to variable header.
621 @param Variable Pointer to the Variable Header.
623 @return Variable Data offset.
627 GetVariableDataOffset (
628 IN VARIABLE_HEADER
*Variable
634 // Be careful about pad size for alignment
636 Value
= GetVariableHeaderSize ();
637 Value
+= NameSizeOfVariable (Variable
);
638 Value
+= GET_PAD_SIZE (NameSizeOfVariable (Variable
));
645 This code gets the pointer to the next variable header.
647 @param Variable Pointer to the Variable Header.
649 @return Pointer to next variable header.
654 IN VARIABLE_HEADER
*Variable
659 Value
= (UINTN
) GetVariableDataPtr (Variable
);
660 Value
+= DataSizeOfVariable (Variable
);
661 Value
+= GET_PAD_SIZE (DataSizeOfVariable (Variable
));
664 // Be careful about pad size for alignment.
666 return (VARIABLE_HEADER
*) HEADER_ALIGN (Value
);
671 Gets the pointer to the first variable header in given variable store area.
673 @param VarStoreHeader Pointer to the Variable Store Header.
675 @return Pointer to the first variable header.
680 IN VARIABLE_STORE_HEADER
*VarStoreHeader
684 // The start of variable store.
686 return (VARIABLE_HEADER
*) HEADER_ALIGN (VarStoreHeader
+ 1);
691 Gets the pointer to the end of the variable storage area.
693 This function gets pointer to the end of the variable storage
694 area, according to the input variable store header.
696 @param VarStoreHeader Pointer to the Variable Store Header.
698 @return Pointer to the end of the variable storage area.
703 IN VARIABLE_STORE_HEADER
*VarStoreHeader
707 // The end of variable store
709 return (VARIABLE_HEADER
*) HEADER_ALIGN ((UINTN
) VarStoreHeader
+ VarStoreHeader
->Size
);
713 Record variable error flag.
715 @param[in] Flag Variable error flag to record.
716 @param[in] VariableName Name of variable.
717 @param[in] VendorGuid Guid of variable.
718 @param[in] Attributes Attributes of the variable.
719 @param[in] VariableSize Size of the variable.
724 IN VAR_ERROR_FLAG Flag
,
725 IN CHAR16
*VariableName
,
726 IN EFI_GUID
*VendorGuid
,
727 IN UINT32 Attributes
,
728 IN UINTN VariableSize
732 VARIABLE_POINTER_TRACK Variable
;
733 VAR_ERROR_FLAG
*VarErrFlag
;
734 VAR_ERROR_FLAG TempFlag
;
737 DEBUG ((EFI_D_ERROR
, "RecordVarErrorFlag (0x%02x) %s:%g - 0x%08x - 0x%x\n", Flag
, VariableName
, VendorGuid
, Attributes
, VariableSize
));
738 if (Flag
== VAR_ERROR_FLAG_SYSTEM_ERROR
) {
740 DEBUG ((EFI_D_ERROR
, "CommonRuntimeVariableSpace = 0x%x - CommonVariableTotalSize = 0x%x\n", mVariableModuleGlobal
->CommonRuntimeVariableSpace
, mVariableModuleGlobal
->CommonVariableTotalSize
));
742 DEBUG ((EFI_D_ERROR
, "CommonVariableSpace = 0x%x - CommonVariableTotalSize = 0x%x\n", mVariableModuleGlobal
->CommonVariableSpace
, mVariableModuleGlobal
->CommonVariableTotalSize
));
745 DEBUG ((EFI_D_ERROR
, "CommonMaxUserVariableSpace = 0x%x - CommonUserVariableTotalSize = 0x%x\n", mVariableModuleGlobal
->CommonMaxUserVariableSpace
, mVariableModuleGlobal
->CommonUserVariableTotalSize
));
751 // Before EndOfDxe, just record the current boot variable error flag to local variable,
752 // and leave the variable error flag in NV flash as the last boot variable error flag.
753 // After EndOfDxe in InitializeVarErrorFlag (), the variable error flag in NV flash
754 // will be initialized to this local current boot variable error flag.
756 mCurrentBootVarErrFlag
&= Flag
;
761 // Record error flag (it should have be initialized).
763 Status
= FindVariable (
765 &gEdkiiVarErrorFlagGuid
,
767 &mVariableModuleGlobal
->VariableGlobal
,
770 if (!EFI_ERROR (Status
)) {
771 VarErrFlag
= (VAR_ERROR_FLAG
*) GetVariableDataPtr (Variable
.CurrPtr
);
772 TempFlag
= *VarErrFlag
;
774 if (TempFlag
== *VarErrFlag
) {
777 Status
= UpdateVariableStore (
778 &mVariableModuleGlobal
->VariableGlobal
,
781 mVariableModuleGlobal
->FvbInstance
,
782 (UINTN
) VarErrFlag
- (UINTN
) mNvVariableCache
+ (UINTN
) mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
,
786 if (!EFI_ERROR (Status
)) {
788 // Update the data in NV cache.
790 *VarErrFlag
= TempFlag
;
796 Initialize variable error flag.
798 Before EndOfDxe, the variable indicates the last boot variable error flag,
799 then it means the last boot variable error flag must be got before EndOfDxe.
800 After EndOfDxe, the variable indicates the current boot variable error flag,
801 then it means the current boot variable error flag must be got after EndOfDxe.
805 InitializeVarErrorFlag (
810 VARIABLE_POINTER_TRACK Variable
;
812 VAR_ERROR_FLAG VarErrFlag
;
818 Flag
= mCurrentBootVarErrFlag
;
819 DEBUG ((EFI_D_INFO
, "Initialize variable error flag (%02x)\n", Flag
));
821 Status
= FindVariable (
823 &gEdkiiVarErrorFlagGuid
,
825 &mVariableModuleGlobal
->VariableGlobal
,
828 if (!EFI_ERROR (Status
)) {
829 VarErrFlag
= *((VAR_ERROR_FLAG
*) GetVariableDataPtr (Variable
.CurrPtr
));
830 if (VarErrFlag
== Flag
) {
837 &gEdkiiVarErrorFlagGuid
,
840 VARIABLE_ATTRIBUTE_NV_BS_RT
,
851 @param[in] Variable Pointer to variable header.
853 @retval TRUE User variable.
854 @retval FALSE System variable.
859 IN VARIABLE_HEADER
*Variable
862 VAR_CHECK_VARIABLE_PROPERTY Property
;
865 // Only after End Of Dxe, the variables belong to system variable are fixed.
866 // If PcdMaxUserNvStorageVariableSize is 0, it means user variable share the same NV storage with system variable,
867 // then no need to check if the variable is user variable or not specially.
869 if (mEndOfDxe
&& (mVariableModuleGlobal
->CommonMaxUserVariableSpace
!= mVariableModuleGlobal
->CommonVariableSpace
)) {
870 if (VarCheckLibVariablePropertyGet (GetVariableNamePtr (Variable
), GetVendorGuidPtr (Variable
), &Property
) == EFI_NOT_FOUND
) {
878 Calculate common user variable total size.
882 CalculateCommonUserVariableTotalSize (
886 VARIABLE_HEADER
*Variable
;
887 VARIABLE_HEADER
*NextVariable
;
889 VAR_CHECK_VARIABLE_PROPERTY Property
;
892 // Only after End Of Dxe, the variables belong to system variable are fixed.
893 // If PcdMaxUserNvStorageVariableSize is 0, it means user variable share the same NV storage with system variable,
894 // then no need to calculate the common user variable total size specially.
896 if (mEndOfDxe
&& (mVariableModuleGlobal
->CommonMaxUserVariableSpace
!= mVariableModuleGlobal
->CommonVariableSpace
)) {
897 Variable
= GetStartPointer (mNvVariableCache
);
898 while (IsValidVariableHeader (Variable
, GetEndPointer (mNvVariableCache
))) {
899 NextVariable
= GetNextVariablePtr (Variable
);
900 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
901 if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
902 if (VarCheckLibVariablePropertyGet (GetVariableNamePtr (Variable
), GetVendorGuidPtr (Variable
), &Property
) == EFI_NOT_FOUND
) {
904 // No property, it is user variable.
906 mVariableModuleGlobal
->CommonUserVariableTotalSize
+= VariableSize
;
910 Variable
= NextVariable
;
916 Initialize variable quota.
920 InitializeVariableQuota (
928 InitializeVarErrorFlag ();
929 CalculateCommonUserVariableTotalSize ();
934 Variable store garbage collection and reclaim operation.
936 @param[in] VariableBase Base address of variable store.
937 @param[out] LastVariableOffset Offset of last variable.
938 @param[in] IsVolatile The variable store is volatile or not;
939 if it is non-volatile, need FTW.
940 @param[in, out] UpdatingPtrTrack Pointer to updating variable pointer track structure.
941 @param[in] NewVariable Pointer to new variable.
942 @param[in] NewVariableSize New variable size.
944 @return EFI_SUCCESS Reclaim operation has finished successfully.
945 @return EFI_OUT_OF_RESOURCES No enough memory resources or variable space.
946 @return Others Unexpect error happened during reclaim operation.
951 IN EFI_PHYSICAL_ADDRESS VariableBase
,
952 OUT UINTN
*LastVariableOffset
,
953 IN BOOLEAN IsVolatile
,
954 IN OUT VARIABLE_POINTER_TRACK
*UpdatingPtrTrack
,
955 IN VARIABLE_HEADER
*NewVariable
,
956 IN UINTN NewVariableSize
959 VARIABLE_HEADER
*Variable
;
960 VARIABLE_HEADER
*AddedVariable
;
961 VARIABLE_HEADER
*NextVariable
;
962 VARIABLE_HEADER
*NextAddedVariable
;
963 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
965 UINTN MaximumBufferSize
;
973 UINTN CommonVariableTotalSize
;
974 UINTN CommonUserVariableTotalSize
;
975 UINTN HwErrVariableTotalSize
;
976 VARIABLE_HEADER
*UpdatingVariable
;
977 VARIABLE_HEADER
*UpdatingInDeletedTransition
;
979 UpdatingVariable
= NULL
;
980 UpdatingInDeletedTransition
= NULL
;
981 if (UpdatingPtrTrack
!= NULL
) {
982 UpdatingVariable
= UpdatingPtrTrack
->CurrPtr
;
983 UpdatingInDeletedTransition
= UpdatingPtrTrack
->InDeletedTransitionPtr
;
986 VariableStoreHeader
= (VARIABLE_STORE_HEADER
*) ((UINTN
) VariableBase
);
988 CommonVariableTotalSize
= 0;
989 CommonUserVariableTotalSize
= 0;
990 HwErrVariableTotalSize
= 0;
994 // Start Pointers for the variable.
996 Variable
= GetStartPointer (VariableStoreHeader
);
997 MaximumBufferSize
= sizeof (VARIABLE_STORE_HEADER
);
999 while (IsValidVariableHeader (Variable
, GetEndPointer (VariableStoreHeader
))) {
1000 NextVariable
= GetNextVariablePtr (Variable
);
1001 if ((Variable
->State
== VAR_ADDED
|| Variable
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) &&
1002 Variable
!= UpdatingVariable
&&
1003 Variable
!= UpdatingInDeletedTransition
1005 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
1006 MaximumBufferSize
+= VariableSize
;
1009 Variable
= NextVariable
;
1012 if (NewVariable
!= NULL
) {
1014 // Add the new variable size.
1016 MaximumBufferSize
+= NewVariableSize
;
1020 // Reserve the 1 Bytes with Oxff to identify the
1021 // end of the variable buffer.
1023 MaximumBufferSize
+= 1;
1024 ValidBuffer
= AllocatePool (MaximumBufferSize
);
1025 if (ValidBuffer
== NULL
) {
1026 return EFI_OUT_OF_RESOURCES
;
1030 // For NV variable reclaim, don't allocate pool here and just use mNvVariableCache
1031 // as the buffer to reduce SMRAM consumption for SMM variable driver.
1033 MaximumBufferSize
= mNvVariableCache
->Size
;
1034 ValidBuffer
= (UINT8
*) mNvVariableCache
;
1037 SetMem (ValidBuffer
, MaximumBufferSize
, 0xff);
1040 // Copy variable store header.
1042 CopyMem (ValidBuffer
, VariableStoreHeader
, sizeof (VARIABLE_STORE_HEADER
));
1043 CurrPtr
= (UINT8
*) GetStartPointer ((VARIABLE_STORE_HEADER
*) ValidBuffer
);
1046 // Reinstall all ADDED variables as long as they are not identical to Updating Variable.
1048 Variable
= GetStartPointer (VariableStoreHeader
);
1049 while (IsValidVariableHeader (Variable
, GetEndPointer (VariableStoreHeader
))) {
1050 NextVariable
= GetNextVariablePtr (Variable
);
1051 if (Variable
!= UpdatingVariable
&& Variable
->State
== VAR_ADDED
) {
1052 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
1053 CopyMem (CurrPtr
, (UINT8
*) Variable
, VariableSize
);
1054 CurrPtr
+= VariableSize
;
1055 if ((!IsVolatile
) && ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
1056 HwErrVariableTotalSize
+= VariableSize
;
1057 } else if ((!IsVolatile
) && ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
1058 CommonVariableTotalSize
+= VariableSize
;
1059 if (IsUserVariable (Variable
)) {
1060 CommonUserVariableTotalSize
+= VariableSize
;
1064 Variable
= NextVariable
;
1068 // Reinstall all in delete transition variables.
1070 Variable
= GetStartPointer (VariableStoreHeader
);
1071 while (IsValidVariableHeader (Variable
, GetEndPointer (VariableStoreHeader
))) {
1072 NextVariable
= GetNextVariablePtr (Variable
);
1073 if (Variable
!= UpdatingVariable
&& Variable
!= UpdatingInDeletedTransition
&& Variable
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
1076 // Buffer has cached all ADDED variable.
1077 // Per IN_DELETED variable, we have to guarantee that
1078 // no ADDED one in previous buffer.
1082 AddedVariable
= GetStartPointer ((VARIABLE_STORE_HEADER
*) ValidBuffer
);
1083 while (IsValidVariableHeader (AddedVariable
, GetEndPointer ((VARIABLE_STORE_HEADER
*) ValidBuffer
))) {
1084 NextAddedVariable
= GetNextVariablePtr (AddedVariable
);
1085 NameSize
= NameSizeOfVariable (AddedVariable
);
1086 if (CompareGuid (GetVendorGuidPtr (AddedVariable
), GetVendorGuidPtr (Variable
)) &&
1087 NameSize
== NameSizeOfVariable (Variable
)
1089 Point0
= (VOID
*) GetVariableNamePtr (AddedVariable
);
1090 Point1
= (VOID
*) GetVariableNamePtr (Variable
);
1091 if (CompareMem (Point0
, Point1
, NameSize
) == 0) {
1096 AddedVariable
= NextAddedVariable
;
1100 // Promote VAR_IN_DELETED_TRANSITION to VAR_ADDED.
1102 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
1103 CopyMem (CurrPtr
, (UINT8
*) Variable
, VariableSize
);
1104 ((VARIABLE_HEADER
*) CurrPtr
)->State
= VAR_ADDED
;
1105 CurrPtr
+= VariableSize
;
1106 if ((!IsVolatile
) && ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
1107 HwErrVariableTotalSize
+= VariableSize
;
1108 } else if ((!IsVolatile
) && ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
1109 CommonVariableTotalSize
+= VariableSize
;
1110 if (IsUserVariable (Variable
)) {
1111 CommonUserVariableTotalSize
+= VariableSize
;
1117 Variable
= NextVariable
;
1121 // Install the new variable if it is not NULL.
1123 if (NewVariable
!= NULL
) {
1124 if (((UINTN
) CurrPtr
- (UINTN
) ValidBuffer
) + NewVariableSize
> VariableStoreHeader
->Size
) {
1126 // No enough space to store the new variable.
1128 Status
= EFI_OUT_OF_RESOURCES
;
1132 if ((NewVariable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
1133 HwErrVariableTotalSize
+= NewVariableSize
;
1134 } else if ((NewVariable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
1135 CommonVariableTotalSize
+= NewVariableSize
;
1136 if (IsUserVariable (NewVariable
)) {
1137 CommonUserVariableTotalSize
+= NewVariableSize
;
1140 if ((HwErrVariableTotalSize
> PcdGet32 (PcdHwErrStorageSize
)) ||
1141 (CommonVariableTotalSize
> mVariableModuleGlobal
->CommonVariableSpace
) ||
1142 (CommonUserVariableTotalSize
> mVariableModuleGlobal
->CommonMaxUserVariableSpace
)) {
1144 // No enough space to store the new variable by NV or NV+HR attribute.
1146 Status
= EFI_OUT_OF_RESOURCES
;
1151 CopyMem (CurrPtr
, (UINT8
*) NewVariable
, NewVariableSize
);
1152 ((VARIABLE_HEADER
*) CurrPtr
)->State
= VAR_ADDED
;
1153 if (UpdatingVariable
!= NULL
) {
1154 UpdatingPtrTrack
->CurrPtr
= (VARIABLE_HEADER
*)((UINTN
)UpdatingPtrTrack
->StartPtr
+ ((UINTN
)CurrPtr
- (UINTN
)GetStartPointer ((VARIABLE_STORE_HEADER
*) ValidBuffer
)));
1155 UpdatingPtrTrack
->InDeletedTransitionPtr
= NULL
;
1157 CurrPtr
+= NewVariableSize
;
1162 // If volatile variable store, just copy valid buffer.
1164 SetMem ((UINT8
*) (UINTN
) VariableBase
, VariableStoreHeader
->Size
, 0xff);
1165 CopyMem ((UINT8
*) (UINTN
) VariableBase
, ValidBuffer
, (UINTN
) CurrPtr
- (UINTN
) ValidBuffer
);
1166 *LastVariableOffset
= (UINTN
) CurrPtr
- (UINTN
) ValidBuffer
;
1167 Status
= EFI_SUCCESS
;
1170 // If non-volatile variable store, perform FTW here.
1172 Status
= FtwVariableSpace (
1174 (VARIABLE_STORE_HEADER
*) ValidBuffer
1176 if (!EFI_ERROR (Status
)) {
1177 *LastVariableOffset
= (UINTN
) CurrPtr
- (UINTN
) ValidBuffer
;
1178 mVariableModuleGlobal
->HwErrVariableTotalSize
= HwErrVariableTotalSize
;
1179 mVariableModuleGlobal
->CommonVariableTotalSize
= CommonVariableTotalSize
;
1180 mVariableModuleGlobal
->CommonUserVariableTotalSize
= CommonUserVariableTotalSize
;
1182 mVariableModuleGlobal
->HwErrVariableTotalSize
= 0;
1183 mVariableModuleGlobal
->CommonVariableTotalSize
= 0;
1184 mVariableModuleGlobal
->CommonUserVariableTotalSize
= 0;
1185 Variable
= GetStartPointer ((VARIABLE_STORE_HEADER
*)(UINTN
)VariableBase
);
1186 while (IsValidVariableHeader (Variable
, GetEndPointer ((VARIABLE_STORE_HEADER
*)(UINTN
)VariableBase
))) {
1187 NextVariable
= GetNextVariablePtr (Variable
);
1188 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
1189 if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
1190 mVariableModuleGlobal
->HwErrVariableTotalSize
+= VariableSize
;
1191 } else if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
1192 mVariableModuleGlobal
->CommonVariableTotalSize
+= VariableSize
;
1193 if (IsUserVariable (Variable
)) {
1194 mVariableModuleGlobal
->CommonUserVariableTotalSize
+= VariableSize
;
1198 Variable
= NextVariable
;
1200 *LastVariableOffset
= (UINTN
) Variable
- (UINTN
) VariableBase
;
1206 FreePool (ValidBuffer
);
1209 // For NV variable reclaim, we use mNvVariableCache as the buffer, so copy the data back.
1211 CopyMem (mNvVariableCache
, (UINT8
*)(UINTN
)VariableBase
, VariableStoreHeader
->Size
);
1218 Find the variable in the specified variable store.
1220 @param[in] VariableName Name of the variable to be found
1221 @param[in] VendorGuid Vendor GUID to be found.
1222 @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute
1223 check at runtime when searching variable.
1224 @param[in, out] PtrTrack Variable Track Pointer structure that contains Variable Information.
1226 @retval EFI_SUCCESS Variable found successfully
1227 @retval EFI_NOT_FOUND Variable not found
1231 IN CHAR16
*VariableName
,
1232 IN EFI_GUID
*VendorGuid
,
1233 IN BOOLEAN IgnoreRtCheck
,
1234 IN OUT VARIABLE_POINTER_TRACK
*PtrTrack
1237 VARIABLE_HEADER
*InDeletedVariable
;
1240 PtrTrack
->InDeletedTransitionPtr
= NULL
;
1243 // Find the variable by walk through HOB, volatile and non-volatile variable store.
1245 InDeletedVariable
= NULL
;
1247 for ( PtrTrack
->CurrPtr
= PtrTrack
->StartPtr
1248 ; IsValidVariableHeader (PtrTrack
->CurrPtr
, PtrTrack
->EndPtr
)
1249 ; PtrTrack
->CurrPtr
= GetNextVariablePtr (PtrTrack
->CurrPtr
)
1251 if (PtrTrack
->CurrPtr
->State
== VAR_ADDED
||
1252 PtrTrack
->CurrPtr
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)
1254 if (IgnoreRtCheck
|| !AtRuntime () || ((PtrTrack
->CurrPtr
->Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) != 0)) {
1255 if (VariableName
[0] == 0) {
1256 if (PtrTrack
->CurrPtr
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
1257 InDeletedVariable
= PtrTrack
->CurrPtr
;
1259 PtrTrack
->InDeletedTransitionPtr
= InDeletedVariable
;
1263 if (CompareGuid (VendorGuid
, GetVendorGuidPtr (PtrTrack
->CurrPtr
))) {
1264 Point
= (VOID
*) GetVariableNamePtr (PtrTrack
->CurrPtr
);
1266 ASSERT (NameSizeOfVariable (PtrTrack
->CurrPtr
) != 0);
1267 if (CompareMem (VariableName
, Point
, NameSizeOfVariable (PtrTrack
->CurrPtr
)) == 0) {
1268 if (PtrTrack
->CurrPtr
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
1269 InDeletedVariable
= PtrTrack
->CurrPtr
;
1271 PtrTrack
->InDeletedTransitionPtr
= InDeletedVariable
;
1281 PtrTrack
->CurrPtr
= InDeletedVariable
;
1282 return (PtrTrack
->CurrPtr
== NULL
) ? EFI_NOT_FOUND
: EFI_SUCCESS
;
1287 Finds variable in storage blocks of volatile and non-volatile storage areas.
1289 This code finds variable in storage blocks of volatile and non-volatile storage areas.
1290 If VariableName is an empty string, then we just return the first
1291 qualified variable without comparing VariableName and VendorGuid.
1292 If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check
1293 at runtime when searching existing variable, only VariableName and VendorGuid are compared.
1294 Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.
1296 @param[in] VariableName Name of the variable to be found.
1297 @param[in] VendorGuid Vendor GUID to be found.
1298 @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,
1299 including the range searched and the target position.
1300 @param[in] Global Pointer to VARIABLE_GLOBAL structure, including
1301 base of volatile variable storage area, base of
1302 NV variable storage area, and a lock.
1303 @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute
1304 check at runtime when searching variable.
1306 @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while
1308 @retval EFI_SUCCESS Variable successfully found.
1309 @retval EFI_NOT_FOUND Variable not found
1314 IN CHAR16
*VariableName
,
1315 IN EFI_GUID
*VendorGuid
,
1316 OUT VARIABLE_POINTER_TRACK
*PtrTrack
,
1317 IN VARIABLE_GLOBAL
*Global
,
1318 IN BOOLEAN IgnoreRtCheck
1322 VARIABLE_STORE_HEADER
*VariableStoreHeader
[VariableStoreTypeMax
];
1323 VARIABLE_STORE_TYPE Type
;
1325 if (VariableName
[0] != 0 && VendorGuid
== NULL
) {
1326 return EFI_INVALID_PARAMETER
;
1330 // 0: Volatile, 1: HOB, 2: Non-Volatile.
1331 // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName
1332 // make use of this mapping to implement search algorithm.
1334 VariableStoreHeader
[VariableStoreTypeVolatile
] = (VARIABLE_STORE_HEADER
*) (UINTN
) Global
->VolatileVariableBase
;
1335 VariableStoreHeader
[VariableStoreTypeHob
] = (VARIABLE_STORE_HEADER
*) (UINTN
) Global
->HobVariableBase
;
1336 VariableStoreHeader
[VariableStoreTypeNv
] = mNvVariableCache
;
1339 // Find the variable by walk through HOB, volatile and non-volatile variable store.
1341 for (Type
= (VARIABLE_STORE_TYPE
) 0; Type
< VariableStoreTypeMax
; Type
++) {
1342 if (VariableStoreHeader
[Type
] == NULL
) {
1346 PtrTrack
->StartPtr
= GetStartPointer (VariableStoreHeader
[Type
]);
1347 PtrTrack
->EndPtr
= GetEndPointer (VariableStoreHeader
[Type
]);
1348 PtrTrack
->Volatile
= (BOOLEAN
) (Type
== VariableStoreTypeVolatile
);
1350 Status
= FindVariableEx (VariableName
, VendorGuid
, IgnoreRtCheck
, PtrTrack
);
1351 if (!EFI_ERROR (Status
)) {
1355 return EFI_NOT_FOUND
;
1359 Get index from supported language codes according to language string.
1361 This code is used to get corresponding index in supported language codes. It can handle
1362 RFC4646 and ISO639 language tags.
1363 In ISO639 language tags, take 3-characters as a delimitation to find matched string and calculate the index.
1364 In RFC4646 language tags, take semicolon as a delimitation to find matched string and calculate the index.
1367 SupportedLang = "engfraengfra"
1369 Iso639Language = TRUE
1370 The return value is "0".
1372 SupportedLang = "en;fr;en-US;fr-FR"
1374 Iso639Language = FALSE
1375 The return value is "3".
1377 @param SupportedLang Platform supported language codes.
1378 @param Lang Configured language.
1379 @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
1381 @retval The index of language in the language codes.
1385 GetIndexFromSupportedLangCodes(
1386 IN CHAR8
*SupportedLang
,
1388 IN BOOLEAN Iso639Language
1392 UINTN CompareLength
;
1393 UINTN LanguageLength
;
1395 if (Iso639Language
) {
1396 CompareLength
= ISO_639_2_ENTRY_SIZE
;
1397 for (Index
= 0; Index
< AsciiStrLen (SupportedLang
); Index
+= CompareLength
) {
1398 if (AsciiStrnCmp (Lang
, SupportedLang
+ Index
, CompareLength
) == 0) {
1400 // Successfully find the index of Lang string in SupportedLang string.
1402 Index
= Index
/ CompareLength
;
1410 // Compare RFC4646 language code
1413 for (LanguageLength
= 0; Lang
[LanguageLength
] != '\0'; LanguageLength
++);
1415 for (Index
= 0; *SupportedLang
!= '\0'; Index
++, SupportedLang
+= CompareLength
) {
1417 // Skip ';' characters in SupportedLang
1419 for (; *SupportedLang
!= '\0' && *SupportedLang
== ';'; SupportedLang
++);
1421 // Determine the length of the next language code in SupportedLang
1423 for (CompareLength
= 0; SupportedLang
[CompareLength
] != '\0' && SupportedLang
[CompareLength
] != ';'; CompareLength
++);
1425 if ((CompareLength
== LanguageLength
) &&
1426 (AsciiStrnCmp (Lang
, SupportedLang
, CompareLength
) == 0)) {
1428 // Successfully find the index of Lang string in SupportedLang string.
1439 Get language string from supported language codes according to index.
1441 This code is used to get corresponding language strings in supported language codes. It can handle
1442 RFC4646 and ISO639 language tags.
1443 In ISO639 language tags, take 3-characters as a delimitation. Find language string according to the index.
1444 In RFC4646 language tags, take semicolon as a delimitation. Find language string according to the index.
1447 SupportedLang = "engfraengfra"
1449 Iso639Language = TRUE
1450 The return value is "fra".
1452 SupportedLang = "en;fr;en-US;fr-FR"
1454 Iso639Language = FALSE
1455 The return value is "fr".
1457 @param SupportedLang Platform supported language codes.
1458 @param Index The index in supported language codes.
1459 @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
1461 @retval The language string in the language codes.
1465 GetLangFromSupportedLangCodes (
1466 IN CHAR8
*SupportedLang
,
1468 IN BOOLEAN Iso639Language
1472 UINTN CompareLength
;
1476 Supported
= SupportedLang
;
1477 if (Iso639Language
) {
1479 // According to the index of Lang string in SupportedLang string to get the language.
1480 // This code will be invoked in RUNTIME, therefore there is not a memory allocate/free operation.
1481 // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.
1483 CompareLength
= ISO_639_2_ENTRY_SIZE
;
1484 mVariableModuleGlobal
->Lang
[CompareLength
] = '\0';
1485 return CopyMem (mVariableModuleGlobal
->Lang
, SupportedLang
+ Index
* CompareLength
, CompareLength
);
1490 // Take semicolon as delimitation, sequentially traverse supported language codes.
1492 for (CompareLength
= 0; *Supported
!= ';' && *Supported
!= '\0'; CompareLength
++) {
1495 if ((*Supported
== '\0') && (SubIndex
!= Index
)) {
1497 // Have completed the traverse, but not find corrsponding string.
1498 // This case is not allowed to happen.
1503 if (SubIndex
== Index
) {
1505 // According to the index of Lang string in SupportedLang string to get the language.
1506 // As this code will be invoked in RUNTIME, therefore there is not memory allocate/free operation.
1507 // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.
1509 mVariableModuleGlobal
->PlatformLang
[CompareLength
] = '\0';
1510 return CopyMem (mVariableModuleGlobal
->PlatformLang
, Supported
- CompareLength
, CompareLength
);
1515 // Skip ';' characters in Supported
1517 for (; *Supported
!= '\0' && *Supported
== ';'; Supported
++);
1523 Returns a pointer to an allocated buffer that contains the best matching language
1524 from a set of supported languages.
1526 This function supports both ISO 639-2 and RFC 4646 language codes, but language
1527 code types may not be mixed in a single call to this function. This function
1528 supports a variable argument list that allows the caller to pass in a prioritized
1529 list of language codes to test against all the language codes in SupportedLanguages.
1531 If SupportedLanguages is NULL, then ASSERT().
1533 @param[in] SupportedLanguages A pointer to a Null-terminated ASCII string that
1534 contains a set of language codes in the format
1535 specified by Iso639Language.
1536 @param[in] Iso639Language If not zero, then all language codes are assumed to be
1537 in ISO 639-2 format. If zero, then all language
1538 codes are assumed to be in RFC 4646 language format
1539 @param[in] ... A variable argument list that contains pointers to
1540 Null-terminated ASCII strings that contain one or more
1541 language codes in the format specified by Iso639Language.
1542 The first language code from each of these language
1543 code lists is used to determine if it is an exact or
1544 close match to any of the language codes in
1545 SupportedLanguages. Close matches only apply to RFC 4646
1546 language codes, and the matching algorithm from RFC 4647
1547 is used to determine if a close match is present. If
1548 an exact or close match is found, then the matching
1549 language code from SupportedLanguages is returned. If
1550 no matches are found, then the next variable argument
1551 parameter is evaluated. The variable argument list
1552 is terminated by a NULL.
1554 @retval NULL The best matching language could not be found in SupportedLanguages.
1555 @retval NULL There are not enough resources available to return the best matching
1557 @retval Other A pointer to a Null-terminated ASCII string that is the best matching
1558 language in SupportedLanguages.
1563 VariableGetBestLanguage (
1564 IN CONST CHAR8
*SupportedLanguages
,
1565 IN UINTN Iso639Language
,
1571 UINTN CompareLength
;
1572 UINTN LanguageLength
;
1573 CONST CHAR8
*Supported
;
1576 if (SupportedLanguages
== NULL
) {
1580 VA_START (Args
, Iso639Language
);
1581 while ((Language
= VA_ARG (Args
, CHAR8
*)) != NULL
) {
1583 // Default to ISO 639-2 mode
1586 LanguageLength
= MIN (3, AsciiStrLen (Language
));
1589 // If in RFC 4646 mode, then determine the length of the first RFC 4646 language code in Language
1591 if (Iso639Language
== 0) {
1592 for (LanguageLength
= 0; Language
[LanguageLength
] != 0 && Language
[LanguageLength
] != ';'; LanguageLength
++);
1596 // Trim back the length of Language used until it is empty
1598 while (LanguageLength
> 0) {
1600 // Loop through all language codes in SupportedLanguages
1602 for (Supported
= SupportedLanguages
; *Supported
!= '\0'; Supported
+= CompareLength
) {
1604 // In RFC 4646 mode, then Loop through all language codes in SupportedLanguages
1606 if (Iso639Language
== 0) {
1608 // Skip ';' characters in Supported
1610 for (; *Supported
!= '\0' && *Supported
== ';'; Supported
++);
1612 // Determine the length of the next language code in Supported
1614 for (CompareLength
= 0; Supported
[CompareLength
] != 0 && Supported
[CompareLength
] != ';'; CompareLength
++);
1616 // If Language is longer than the Supported, then skip to the next language
1618 if (LanguageLength
> CompareLength
) {
1623 // See if the first LanguageLength characters in Supported match Language
1625 if (AsciiStrnCmp (Supported
, Language
, LanguageLength
) == 0) {
1628 Buffer
= (Iso639Language
!= 0) ? mVariableModuleGlobal
->Lang
: mVariableModuleGlobal
->PlatformLang
;
1629 Buffer
[CompareLength
] = '\0';
1630 return CopyMem (Buffer
, Supported
, CompareLength
);
1634 if (Iso639Language
!= 0) {
1636 // If ISO 639 mode, then each language can only be tested once
1641 // If RFC 4646 mode, then trim Language from the right to the next '-' character
1643 for (LanguageLength
--; LanguageLength
> 0 && Language
[LanguageLength
] != '-'; LanguageLength
--);
1650 // No matches were found
1656 This function is to check if the remaining variable space is enough to set
1657 all Variables from argument list successfully. The purpose of the check
1658 is to keep the consistency of the Variables to be in variable storage.
1660 Note: Variables are assumed to be in same storage.
1661 The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
1662 so follow the argument sequence to check the Variables.
1664 @param[in] Attributes Variable attributes for Variable entries.
1665 @param[in] Marker VA_LIST style variable argument list.
1666 The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
1667 A NULL terminates the list. The VariableSize of
1668 VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.
1669 It will be changed to variable total size as output.
1671 @retval TRUE Have enough variable space to set the Variables successfully.
1672 @retval FALSE No enough variable space to set the Variables successfully.
1677 CheckRemainingSpaceForConsistencyInternal (
1678 IN UINT32 Attributes
,
1684 VARIABLE_ENTRY_CONSISTENCY
*VariableEntry
;
1685 UINT64 MaximumVariableStorageSize
;
1686 UINT64 RemainingVariableStorageSize
;
1687 UINT64 MaximumVariableSize
;
1688 UINTN TotalNeededSize
;
1689 UINTN OriginalVarSize
;
1690 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
1691 VARIABLE_POINTER_TRACK VariablePtrTrack
;
1692 VARIABLE_HEADER
*NextVariable
;
1697 // Non-Volatile related.
1699 VariableStoreHeader
= mNvVariableCache
;
1701 Status
= VariableServiceQueryVariableInfoInternal (
1703 &MaximumVariableStorageSize
,
1704 &RemainingVariableStorageSize
,
1705 &MaximumVariableSize
1707 ASSERT_EFI_ERROR (Status
);
1709 TotalNeededSize
= 0;
1710 VA_COPY (Args
, Marker
);
1711 VariableEntry
= VA_ARG (Args
, VARIABLE_ENTRY_CONSISTENCY
*);
1712 while (VariableEntry
!= NULL
) {
1714 // Calculate variable total size.
1716 VarNameSize
= StrSize (VariableEntry
->Name
);
1717 VarNameSize
+= GET_PAD_SIZE (VarNameSize
);
1718 VarDataSize
= VariableEntry
->VariableSize
;
1719 VarDataSize
+= GET_PAD_SIZE (VarDataSize
);
1720 VariableEntry
->VariableSize
= HEADER_ALIGN (GetVariableHeaderSize () + VarNameSize
+ VarDataSize
);
1722 TotalNeededSize
+= VariableEntry
->VariableSize
;
1723 VariableEntry
= VA_ARG (Args
, VARIABLE_ENTRY_CONSISTENCY
*);
1727 if (RemainingVariableStorageSize
>= TotalNeededSize
) {
1729 // Already have enough space.
1732 } else if (AtRuntime ()) {
1734 // At runtime, no reclaim.
1735 // The original variable space of Variables can't be reused.
1740 VA_COPY (Args
, Marker
);
1741 VariableEntry
= VA_ARG (Args
, VARIABLE_ENTRY_CONSISTENCY
*);
1742 while (VariableEntry
!= NULL
) {
1744 // Check if Variable[Index] has been present and get its size.
1746 OriginalVarSize
= 0;
1747 VariablePtrTrack
.StartPtr
= GetStartPointer (VariableStoreHeader
);
1748 VariablePtrTrack
.EndPtr
= GetEndPointer (VariableStoreHeader
);
1749 Status
= FindVariableEx (
1750 VariableEntry
->Name
,
1751 VariableEntry
->Guid
,
1755 if (!EFI_ERROR (Status
)) {
1757 // Get size of Variable[Index].
1759 NextVariable
= GetNextVariablePtr (VariablePtrTrack
.CurrPtr
);
1760 OriginalVarSize
= (UINTN
) NextVariable
- (UINTN
) VariablePtrTrack
.CurrPtr
;
1762 // Add the original size of Variable[Index] to remaining variable storage size.
1764 RemainingVariableStorageSize
+= OriginalVarSize
;
1766 if (VariableEntry
->VariableSize
> RemainingVariableStorageSize
) {
1768 // No enough space for Variable[Index].
1774 // Sub the (new) size of Variable[Index] from remaining variable storage size.
1776 RemainingVariableStorageSize
-= VariableEntry
->VariableSize
;
1777 VariableEntry
= VA_ARG (Args
, VARIABLE_ENTRY_CONSISTENCY
*);
1785 This function is to check if the remaining variable space is enough to set
1786 all Variables from argument list successfully. The purpose of the check
1787 is to keep the consistency of the Variables to be in variable storage.
1789 Note: Variables are assumed to be in same storage.
1790 The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
1791 so follow the argument sequence to check the Variables.
1793 @param[in] Attributes Variable attributes for Variable entries.
1794 @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
1795 A NULL terminates the list. The VariableSize of
1796 VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.
1797 It will be changed to variable total size as output.
1799 @retval TRUE Have enough variable space to set the Variables successfully.
1800 @retval FALSE No enough variable space to set the Variables successfully.
1805 CheckRemainingSpaceForConsistency (
1806 IN UINT32 Attributes
,
1813 VA_START (Marker
, Attributes
);
1815 Return
= CheckRemainingSpaceForConsistencyInternal (Attributes
, Marker
);
1823 Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang.
1825 When setting Lang/LangCodes, simultaneously update PlatformLang/PlatformLangCodes.
1827 According to UEFI spec, PlatformLangCodes/LangCodes are only set once in firmware initialization,
1828 and are read-only. Therefore, in variable driver, only store the original value for other use.
1830 @param[in] VariableName Name of variable.
1832 @param[in] Data Variable data.
1834 @param[in] DataSize Size of data. 0 means delete.
1836 @retval EFI_SUCCESS The update operation is successful or ignored.
1837 @retval EFI_WRITE_PROTECTED Update PlatformLangCodes/LangCodes at runtime.
1838 @retval EFI_OUT_OF_RESOURCES No enough variable space to do the update operation.
1839 @retval Others Other errors happened during the update operation.
1843 AutoUpdateLangVariable (
1844 IN CHAR16
*VariableName
,
1850 CHAR8
*BestPlatformLang
;
1854 VARIABLE_POINTER_TRACK Variable
;
1855 BOOLEAN SetLanguageCodes
;
1856 VARIABLE_ENTRY_CONSISTENCY VariableEntry
[2];
1859 // Don't do updates for delete operation
1861 if (DataSize
== 0) {
1865 SetLanguageCodes
= FALSE
;
1867 if (StrCmp (VariableName
, EFI_PLATFORM_LANG_CODES_VARIABLE_NAME
) == 0) {
1869 // PlatformLangCodes is a volatile variable, so it can not be updated at runtime.
1872 return EFI_WRITE_PROTECTED
;
1875 SetLanguageCodes
= TRUE
;
1878 // According to UEFI spec, PlatformLangCodes is only set once in firmware initialization, and is read-only
1879 // Therefore, in variable driver, only store the original value for other use.
1881 if (mVariableModuleGlobal
->PlatformLangCodes
!= NULL
) {
1882 FreePool (mVariableModuleGlobal
->PlatformLangCodes
);
1884 mVariableModuleGlobal
->PlatformLangCodes
= AllocateRuntimeCopyPool (DataSize
, Data
);
1885 ASSERT (mVariableModuleGlobal
->PlatformLangCodes
!= NULL
);
1888 // PlatformLang holds a single language from PlatformLangCodes,
1889 // so the size of PlatformLangCodes is enough for the PlatformLang.
1891 if (mVariableModuleGlobal
->PlatformLang
!= NULL
) {
1892 FreePool (mVariableModuleGlobal
->PlatformLang
);
1894 mVariableModuleGlobal
->PlatformLang
= AllocateRuntimePool (DataSize
);
1895 ASSERT (mVariableModuleGlobal
->PlatformLang
!= NULL
);
1897 } else if (StrCmp (VariableName
, EFI_LANG_CODES_VARIABLE_NAME
) == 0) {
1899 // LangCodes is a volatile variable, so it can not be updated at runtime.
1902 return EFI_WRITE_PROTECTED
;
1905 SetLanguageCodes
= TRUE
;
1908 // According to UEFI spec, LangCodes is only set once in firmware initialization, and is read-only
1909 // Therefore, in variable driver, only store the original value for other use.
1911 if (mVariableModuleGlobal
->LangCodes
!= NULL
) {
1912 FreePool (mVariableModuleGlobal
->LangCodes
);
1914 mVariableModuleGlobal
->LangCodes
= AllocateRuntimeCopyPool (DataSize
, Data
);
1915 ASSERT (mVariableModuleGlobal
->LangCodes
!= NULL
);
1918 if (SetLanguageCodes
1919 && (mVariableModuleGlobal
->PlatformLangCodes
!= NULL
)
1920 && (mVariableModuleGlobal
->LangCodes
!= NULL
)) {
1922 // Update Lang if PlatformLang is already set
1923 // Update PlatformLang if Lang is already set
1925 Status
= FindVariable (EFI_PLATFORM_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
1926 if (!EFI_ERROR (Status
)) {
1930 VariableName
= EFI_PLATFORM_LANG_VARIABLE_NAME
;
1931 Data
= GetVariableDataPtr (Variable
.CurrPtr
);
1932 DataSize
= DataSizeOfVariable (Variable
.CurrPtr
);
1934 Status
= FindVariable (EFI_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
1935 if (!EFI_ERROR (Status
)) {
1937 // Update PlatformLang
1939 VariableName
= EFI_LANG_VARIABLE_NAME
;
1940 Data
= GetVariableDataPtr (Variable
.CurrPtr
);
1941 DataSize
= DataSizeOfVariable (Variable
.CurrPtr
);
1944 // Neither PlatformLang nor Lang is set, directly return
1951 Status
= EFI_SUCCESS
;
1954 // According to UEFI spec, "Lang" and "PlatformLang" is NV|BS|RT attributions.
1956 Attributes
= EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_BOOTSERVICE_ACCESS
| EFI_VARIABLE_RUNTIME_ACCESS
;
1958 if (StrCmp (VariableName
, EFI_PLATFORM_LANG_VARIABLE_NAME
) == 0) {
1960 // Update Lang when PlatformLangCodes/LangCodes were set.
1962 if ((mVariableModuleGlobal
->PlatformLangCodes
!= NULL
) && (mVariableModuleGlobal
->LangCodes
!= NULL
)) {
1964 // When setting PlatformLang, firstly get most matched language string from supported language codes.
1966 BestPlatformLang
= VariableGetBestLanguage (mVariableModuleGlobal
->PlatformLangCodes
, FALSE
, Data
, NULL
);
1967 if (BestPlatformLang
!= NULL
) {
1969 // Get the corresponding index in language codes.
1971 Index
= GetIndexFromSupportedLangCodes (mVariableModuleGlobal
->PlatformLangCodes
, BestPlatformLang
, FALSE
);
1974 // Get the corresponding ISO639 language tag according to RFC4646 language tag.
1976 BestLang
= GetLangFromSupportedLangCodes (mVariableModuleGlobal
->LangCodes
, Index
, TRUE
);
1979 // Check the variable space for both Lang and PlatformLang variable.
1981 VariableEntry
[0].VariableSize
= ISO_639_2_ENTRY_SIZE
+ 1;
1982 VariableEntry
[0].Guid
= &gEfiGlobalVariableGuid
;
1983 VariableEntry
[0].Name
= EFI_LANG_VARIABLE_NAME
;
1985 VariableEntry
[1].VariableSize
= AsciiStrSize (BestPlatformLang
);
1986 VariableEntry
[1].Guid
= &gEfiGlobalVariableGuid
;
1987 VariableEntry
[1].Name
= EFI_PLATFORM_LANG_VARIABLE_NAME
;
1988 if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT
, &VariableEntry
[0], &VariableEntry
[1], NULL
)) {
1990 // No enough variable space to set both Lang and PlatformLang successfully.
1992 Status
= EFI_OUT_OF_RESOURCES
;
1995 // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.
1997 FindVariable (EFI_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
1999 Status
= UpdateVariable (EFI_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, BestLang
,
2000 ISO_639_2_ENTRY_SIZE
+ 1, Attributes
, 0, 0, &Variable
, NULL
);
2003 DEBUG ((EFI_D_INFO
, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a Status: %r\n", BestPlatformLang
, BestLang
, Status
));
2007 } else if (StrCmp (VariableName
, EFI_LANG_VARIABLE_NAME
) == 0) {
2009 // Update PlatformLang when PlatformLangCodes/LangCodes were set.
2011 if ((mVariableModuleGlobal
->PlatformLangCodes
!= NULL
) && (mVariableModuleGlobal
->LangCodes
!= NULL
)) {
2013 // When setting Lang, firstly get most matched language string from supported language codes.
2015 BestLang
= VariableGetBestLanguage (mVariableModuleGlobal
->LangCodes
, TRUE
, Data
, NULL
);
2016 if (BestLang
!= NULL
) {
2018 // Get the corresponding index in language codes.
2020 Index
= GetIndexFromSupportedLangCodes (mVariableModuleGlobal
->LangCodes
, BestLang
, TRUE
);
2023 // Get the corresponding RFC4646 language tag according to ISO639 language tag.
2025 BestPlatformLang
= GetLangFromSupportedLangCodes (mVariableModuleGlobal
->PlatformLangCodes
, Index
, FALSE
);
2028 // Check the variable space for both PlatformLang and Lang variable.
2030 VariableEntry
[0].VariableSize
= AsciiStrSize (BestPlatformLang
);
2031 VariableEntry
[0].Guid
= &gEfiGlobalVariableGuid
;
2032 VariableEntry
[0].Name
= EFI_PLATFORM_LANG_VARIABLE_NAME
;
2034 VariableEntry
[1].VariableSize
= ISO_639_2_ENTRY_SIZE
+ 1;
2035 VariableEntry
[1].Guid
= &gEfiGlobalVariableGuid
;
2036 VariableEntry
[1].Name
= EFI_LANG_VARIABLE_NAME
;
2037 if (!CheckRemainingSpaceForConsistency (VARIABLE_ATTRIBUTE_NV_BS_RT
, &VariableEntry
[0], &VariableEntry
[1], NULL
)) {
2039 // No enough variable space to set both PlatformLang and Lang successfully.
2041 Status
= EFI_OUT_OF_RESOURCES
;
2044 // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.
2046 FindVariable (EFI_PLATFORM_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
2048 Status
= UpdateVariable (EFI_PLATFORM_LANG_VARIABLE_NAME
, &gEfiGlobalVariableGuid
, BestPlatformLang
,
2049 AsciiStrSize (BestPlatformLang
), Attributes
, 0, 0, &Variable
, NULL
);
2052 DEBUG ((EFI_D_INFO
, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a Status: %r\n", BestLang
, BestPlatformLang
, Status
));
2057 if (SetLanguageCodes
) {
2059 // Continue to set PlatformLangCodes or LangCodes.
2068 Compare two EFI_TIME data.
2071 @param FirstTime A pointer to the first EFI_TIME data.
2072 @param SecondTime A pointer to the second EFI_TIME data.
2074 @retval TRUE The FirstTime is not later than the SecondTime.
2075 @retval FALSE The FirstTime is later than the SecondTime.
2079 VariableCompareTimeStampInternal (
2080 IN EFI_TIME
*FirstTime
,
2081 IN EFI_TIME
*SecondTime
2084 if (FirstTime
->Year
!= SecondTime
->Year
) {
2085 return (BOOLEAN
) (FirstTime
->Year
< SecondTime
->Year
);
2086 } else if (FirstTime
->Month
!= SecondTime
->Month
) {
2087 return (BOOLEAN
) (FirstTime
->Month
< SecondTime
->Month
);
2088 } else if (FirstTime
->Day
!= SecondTime
->Day
) {
2089 return (BOOLEAN
) (FirstTime
->Day
< SecondTime
->Day
);
2090 } else if (FirstTime
->Hour
!= SecondTime
->Hour
) {
2091 return (BOOLEAN
) (FirstTime
->Hour
< SecondTime
->Hour
);
2092 } else if (FirstTime
->Minute
!= SecondTime
->Minute
) {
2093 return (BOOLEAN
) (FirstTime
->Minute
< SecondTime
->Minute
);
2096 return (BOOLEAN
) (FirstTime
->Second
<= SecondTime
->Second
);
2100 Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,
2101 index of associated public key is needed.
2103 @param[in] VariableName Name of variable.
2104 @param[in] VendorGuid Guid of variable.
2105 @param[in] Data Variable data.
2106 @param[in] DataSize Size of data. 0 means delete.
2107 @param[in] Attributes Attributes of the variable.
2108 @param[in] KeyIndex Index of associated public key.
2109 @param[in] MonotonicCount Value of associated monotonic count.
2110 @param[in, out] CacheVariable The variable information which is used to keep track of variable usage.
2111 @param[in] TimeStamp Value of associated TimeStamp.
2113 @retval EFI_SUCCESS The update operation is success.
2114 @retval EFI_OUT_OF_RESOURCES Variable region is full, can not write other data into this region.
2119 IN CHAR16
*VariableName
,
2120 IN EFI_GUID
*VendorGuid
,
2123 IN UINT32 Attributes OPTIONAL
,
2124 IN UINT32 KeyIndex OPTIONAL
,
2125 IN UINT64 MonotonicCount OPTIONAL
,
2126 IN OUT VARIABLE_POINTER_TRACK
*CacheVariable
,
2127 IN EFI_TIME
*TimeStamp OPTIONAL
2131 VARIABLE_HEADER
*NextVariable
;
2134 UINTN VarNameOffset
;
2135 UINTN VarDataOffset
;
2139 EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL
*Fvb
;
2141 VARIABLE_POINTER_TRACK
*Variable
;
2142 VARIABLE_POINTER_TRACK NvVariable
;
2143 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
2145 UINT8
*BufferForMerge
;
2146 UINTN MergedBufSize
;
2149 BOOLEAN IsCommonVariable
;
2150 BOOLEAN IsCommonUserVariable
;
2151 AUTHENTICATED_VARIABLE_HEADER
*AuthVariable
;
2153 if (mVariableModuleGlobal
->FvbInstance
== NULL
) {
2155 // The FVB protocol is not ready, so the EFI_VARIABLE_WRITE_ARCH_PROTOCOL is not installed.
2157 if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
2159 // Trying to update NV variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL
2161 DEBUG ((EFI_D_ERROR
, "Update NV variable before EFI_VARIABLE_WRITE_ARCH_PROTOCOL ready - %r\n", EFI_NOT_AVAILABLE_YET
));
2162 return EFI_NOT_AVAILABLE_YET
;
2163 } else if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
2165 // Trying to update volatile authenticated variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL
2166 // The authenticated variable perhaps is not initialized, just return here.
2168 DEBUG ((EFI_D_ERROR
, "Update AUTH variable before EFI_VARIABLE_WRITE_ARCH_PROTOCOL ready - %r\n", EFI_NOT_AVAILABLE_YET
));
2169 return EFI_NOT_AVAILABLE_YET
;
2174 // Check if CacheVariable points to the variable in variable HOB.
2175 // If yes, let CacheVariable points to the variable in NV variable cache.
2177 if ((CacheVariable
->CurrPtr
!= NULL
) &&
2178 (mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
!= 0) &&
2179 (CacheVariable
->StartPtr
== GetStartPointer ((VARIABLE_STORE_HEADER
*) (UINTN
) mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
))
2181 CacheVariable
->StartPtr
= GetStartPointer (mNvVariableCache
);
2182 CacheVariable
->EndPtr
= GetEndPointer (mNvVariableCache
);
2183 CacheVariable
->Volatile
= FALSE
;
2184 Status
= FindVariableEx (VariableName
, VendorGuid
, FALSE
, CacheVariable
);
2185 if (CacheVariable
->CurrPtr
== NULL
|| EFI_ERROR (Status
)) {
2187 // There is no matched variable in NV variable cache.
2189 if ((((Attributes
& EFI_VARIABLE_APPEND_WRITE
) == 0) && (DataSize
== 0)) || (Attributes
== 0)) {
2191 // It is to delete variable,
2192 // go to delete this variable in variable HOB and
2193 // try to flush other variables from HOB to flash.
2195 UpdateVariableInfo (VariableName
, VendorGuid
, FALSE
, FALSE
, FALSE
, TRUE
, FALSE
);
2196 FlushHobVariableToFlash (VariableName
, VendorGuid
);
2202 if ((CacheVariable
->CurrPtr
== NULL
) || CacheVariable
->Volatile
) {
2203 Variable
= CacheVariable
;
2206 // Update/Delete existing NV variable.
2207 // CacheVariable points to the variable in the memory copy of Flash area
2208 // Now let Variable points to the same variable in Flash area.
2210 VariableStoreHeader
= (VARIABLE_STORE_HEADER
*) ((UINTN
) mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
);
2211 Variable
= &NvVariable
;
2212 Variable
->StartPtr
= GetStartPointer (VariableStoreHeader
);
2213 Variable
->EndPtr
= (VARIABLE_HEADER
*)((UINTN
)Variable
->StartPtr
+ ((UINTN
)CacheVariable
->EndPtr
- (UINTN
)CacheVariable
->StartPtr
));
2215 Variable
->CurrPtr
= (VARIABLE_HEADER
*)((UINTN
)Variable
->StartPtr
+ ((UINTN
)CacheVariable
->CurrPtr
- (UINTN
)CacheVariable
->StartPtr
));
2216 if (CacheVariable
->InDeletedTransitionPtr
!= NULL
) {
2217 Variable
->InDeletedTransitionPtr
= (VARIABLE_HEADER
*)((UINTN
)Variable
->StartPtr
+ ((UINTN
)CacheVariable
->InDeletedTransitionPtr
- (UINTN
)CacheVariable
->StartPtr
));
2219 Variable
->InDeletedTransitionPtr
= NULL
;
2221 Variable
->Volatile
= FALSE
;
2224 Fvb
= mVariableModuleGlobal
->FvbInstance
;
2227 // Tricky part: Use scratch data area at the end of volatile variable store
2228 // as a temporary storage.
2230 NextVariable
= GetEndPointer ((VARIABLE_STORE_HEADER
*) ((UINTN
) mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
));
2231 ScratchSize
= mVariableModuleGlobal
->ScratchBufferSize
;
2232 SetMem (NextVariable
, ScratchSize
, 0xff);
2235 if (Variable
->CurrPtr
!= NULL
) {
2237 // Update/Delete existing variable.
2241 // If AtRuntime and the variable is Volatile and Runtime Access,
2242 // the volatile is ReadOnly, and SetVariable should be aborted and
2243 // return EFI_WRITE_PROTECTED.
2245 if (Variable
->Volatile
) {
2246 Status
= EFI_WRITE_PROTECTED
;
2250 // Only variable that have NV attributes can be updated/deleted in Runtime.
2252 if ((CacheVariable
->CurrPtr
->Attributes
& EFI_VARIABLE_NON_VOLATILE
) == 0) {
2253 Status
= EFI_INVALID_PARAMETER
;
2258 // Only variable that have RT attributes can be updated/deleted in Runtime.
2260 if ((CacheVariable
->CurrPtr
->Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) == 0) {
2261 Status
= EFI_INVALID_PARAMETER
;
2267 // Setting a data variable with no access, or zero DataSize attributes
2268 // causes it to be deleted.
2269 // When the EFI_VARIABLE_APPEND_WRITE attribute is set, DataSize of zero will
2270 // not delete the variable.
2272 if ((((Attributes
& EFI_VARIABLE_APPEND_WRITE
) == 0) && (DataSize
== 0))|| ((Attributes
& (EFI_VARIABLE_RUNTIME_ACCESS
| EFI_VARIABLE_BOOTSERVICE_ACCESS
)) == 0)) {
2273 if (Variable
->InDeletedTransitionPtr
!= NULL
) {
2275 // Both ADDED and IN_DELETED_TRANSITION variable are present,
2276 // set IN_DELETED_TRANSITION one to DELETED state first.
2278 ASSERT (CacheVariable
->InDeletedTransitionPtr
!= NULL
);
2279 State
= CacheVariable
->InDeletedTransitionPtr
->State
;
2280 State
&= VAR_DELETED
;
2281 Status
= UpdateVariableStore (
2282 &mVariableModuleGlobal
->VariableGlobal
,
2286 (UINTN
) &Variable
->InDeletedTransitionPtr
->State
,
2290 if (!EFI_ERROR (Status
)) {
2291 if (!Variable
->Volatile
) {
2292 CacheVariable
->InDeletedTransitionPtr
->State
= State
;
2299 State
= CacheVariable
->CurrPtr
->State
;
2300 State
&= VAR_DELETED
;
2302 Status
= UpdateVariableStore (
2303 &mVariableModuleGlobal
->VariableGlobal
,
2307 (UINTN
) &Variable
->CurrPtr
->State
,
2311 if (!EFI_ERROR (Status
)) {
2312 UpdateVariableInfo (VariableName
, VendorGuid
, Variable
->Volatile
, FALSE
, FALSE
, TRUE
, FALSE
);
2313 if (!Variable
->Volatile
) {
2314 CacheVariable
->CurrPtr
->State
= State
;
2315 FlushHobVariableToFlash (VariableName
, VendorGuid
);
2321 // If the variable is marked valid, and the same data has been passed in,
2322 // then return to the caller immediately.
2324 if (DataSizeOfVariable (CacheVariable
->CurrPtr
) == DataSize
&&
2325 (CompareMem (Data
, GetVariableDataPtr (CacheVariable
->CurrPtr
), DataSize
) == 0) &&
2326 ((Attributes
& EFI_VARIABLE_APPEND_WRITE
) == 0) &&
2327 (TimeStamp
== NULL
)) {
2329 // Variable content unchanged and no need to update timestamp, just return.
2331 UpdateVariableInfo (VariableName
, VendorGuid
, Variable
->Volatile
, FALSE
, TRUE
, FALSE
, FALSE
);
2332 Status
= EFI_SUCCESS
;
2334 } else if ((CacheVariable
->CurrPtr
->State
== VAR_ADDED
) ||
2335 (CacheVariable
->CurrPtr
->State
== (VAR_ADDED
& VAR_IN_DELETED_TRANSITION
))) {
2338 // EFI_VARIABLE_APPEND_WRITE attribute only effects for existing variable.
2340 if ((Attributes
& EFI_VARIABLE_APPEND_WRITE
) != 0) {
2342 // NOTE: From 0 to DataOffset of NextVariable is reserved for Variable Header and Name.
2343 // From DataOffset of NextVariable is to save the existing variable data.
2345 DataOffset
= GetVariableDataOffset (CacheVariable
->CurrPtr
);
2346 BufferForMerge
= (UINT8
*) ((UINTN
) NextVariable
+ DataOffset
);
2347 CopyMem (BufferForMerge
, (UINT8
*) ((UINTN
) CacheVariable
->CurrPtr
+ DataOffset
), DataSizeOfVariable (CacheVariable
->CurrPtr
));
2350 // Set Max Auth/Non-Volatile/Volatile Variable Data Size as default MaxDataSize.
2352 if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
2353 MaxDataSize
= mVariableModuleGlobal
->MaxAuthVariableSize
- DataOffset
;
2354 } else if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
2355 MaxDataSize
= mVariableModuleGlobal
->MaxVariableSize
- DataOffset
;
2357 MaxDataSize
= mVariableModuleGlobal
->MaxVolatileVariableSize
- DataOffset
;
2361 // Append the new data to the end of existing data.
2362 // Max Harware error record variable data size is different from common/auth variable.
2364 if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
2365 MaxDataSize
= PcdGet32 (PcdMaxHardwareErrorVariableSize
) - DataOffset
;
2368 if (DataSizeOfVariable (CacheVariable
->CurrPtr
) + DataSize
> MaxDataSize
) {
2370 // Existing data size + new data size exceed maximum variable size limitation.
2372 Status
= EFI_INVALID_PARAMETER
;
2375 CopyMem ((UINT8
*) ((UINTN
) BufferForMerge
+ DataSizeOfVariable (CacheVariable
->CurrPtr
)), Data
, DataSize
);
2376 MergedBufSize
= DataSizeOfVariable (CacheVariable
->CurrPtr
) + DataSize
;
2379 // BufferForMerge(from DataOffset of NextVariable) has included the merged existing and new data.
2381 Data
= BufferForMerge
;
2382 DataSize
= MergedBufSize
;
2387 // Mark the old variable as in delete transition.
2389 State
= CacheVariable
->CurrPtr
->State
;
2390 State
&= VAR_IN_DELETED_TRANSITION
;
2392 Status
= UpdateVariableStore (
2393 &mVariableModuleGlobal
->VariableGlobal
,
2397 (UINTN
) &Variable
->CurrPtr
->State
,
2401 if (EFI_ERROR (Status
)) {
2404 if (!Variable
->Volatile
) {
2405 CacheVariable
->CurrPtr
->State
= State
;
2410 // Not found existing variable. Create a new variable.
2413 if ((DataSize
== 0) && ((Attributes
& EFI_VARIABLE_APPEND_WRITE
) != 0)) {
2414 Status
= EFI_SUCCESS
;
2419 // Make sure we are trying to create a new variable.
2420 // Setting a data variable with zero DataSize or no access attributes means to delete it.
2422 if (DataSize
== 0 || (Attributes
& (EFI_VARIABLE_RUNTIME_ACCESS
| EFI_VARIABLE_BOOTSERVICE_ACCESS
)) == 0) {
2423 Status
= EFI_NOT_FOUND
;
2428 // Only variable have NV|RT attribute can be created in Runtime.
2431 (((Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) == 0) || ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) == 0))) {
2432 Status
= EFI_INVALID_PARAMETER
;
2438 // Function part - create a new variable and copy the data.
2439 // Both update a variable and create a variable will come here.
2441 NextVariable
->StartId
= VARIABLE_DATA
;
2443 // NextVariable->State = VAR_ADDED;
2445 NextVariable
->Reserved
= 0;
2446 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
2447 AuthVariable
= (AUTHENTICATED_VARIABLE_HEADER
*) NextVariable
;
2448 AuthVariable
->PubKeyIndex
= KeyIndex
;
2449 AuthVariable
->MonotonicCount
= MonotonicCount
;
2450 ZeroMem (&AuthVariable
->TimeStamp
, sizeof (EFI_TIME
));
2452 if (((Attributes
& EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
) != 0) &&
2453 (TimeStamp
!= NULL
)) {
2454 if ((Attributes
& EFI_VARIABLE_APPEND_WRITE
) == 0) {
2455 CopyMem (&AuthVariable
->TimeStamp
, TimeStamp
, sizeof (EFI_TIME
));
2458 // In the case when the EFI_VARIABLE_APPEND_WRITE attribute is set, only
2459 // when the new TimeStamp value is later than the current timestamp associated
2460 // with the variable, we need associate the new timestamp with the updated value.
2462 if (Variable
->CurrPtr
!= NULL
) {
2463 if (VariableCompareTimeStampInternal (&(((AUTHENTICATED_VARIABLE_HEADER
*) CacheVariable
->CurrPtr
)->TimeStamp
), TimeStamp
)) {
2464 CopyMem (&AuthVariable
->TimeStamp
, TimeStamp
, sizeof (EFI_TIME
));
2472 // The EFI_VARIABLE_APPEND_WRITE attribute will never be set in the returned
2473 // Attributes bitmask parameter of a GetVariable() call.
2475 NextVariable
->Attributes
= Attributes
& (~EFI_VARIABLE_APPEND_WRITE
);
2477 VarNameOffset
= GetVariableHeaderSize ();
2478 VarNameSize
= StrSize (VariableName
);
2480 (UINT8
*) ((UINTN
) NextVariable
+ VarNameOffset
),
2484 VarDataOffset
= VarNameOffset
+ VarNameSize
+ GET_PAD_SIZE (VarNameSize
);
2487 // If DataReady is TRUE, it means the variable data has been saved into
2488 // NextVariable during EFI_VARIABLE_APPEND_WRITE operation preparation.
2492 (UINT8
*) ((UINTN
) NextVariable
+ VarDataOffset
),
2498 CopyMem (GetVendorGuidPtr (NextVariable
), VendorGuid
, sizeof (EFI_GUID
));
2500 // There will be pad bytes after Data, the NextVariable->NameSize and
2501 // NextVariable->DataSize should not include pad size so that variable
2502 // service can get actual size in GetVariable.
2504 SetNameSizeOfVariable (NextVariable
, VarNameSize
);
2505 SetDataSizeOfVariable (NextVariable
, DataSize
);
2508 // The actual size of the variable that stores in storage should
2509 // include pad size.
2511 VarSize
= VarDataOffset
+ DataSize
+ GET_PAD_SIZE (DataSize
);
2512 if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
2514 // Create a nonvolatile variable.
2518 IsCommonVariable
= FALSE
;
2519 IsCommonUserVariable
= FALSE
;
2520 if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == 0) {
2521 IsCommonVariable
= TRUE
;
2522 IsCommonUserVariable
= IsUserVariable (NextVariable
);
2524 if ((((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != 0)
2525 && ((VarSize
+ mVariableModuleGlobal
->HwErrVariableTotalSize
) > PcdGet32 (PcdHwErrStorageSize
)))
2526 || (IsCommonVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonVariableTotalSize
) > mVariableModuleGlobal
->CommonVariableSpace
))
2527 || (IsCommonVariable
&& AtRuntime () && ((VarSize
+ mVariableModuleGlobal
->CommonVariableTotalSize
) > mVariableModuleGlobal
->CommonRuntimeVariableSpace
))
2528 || (IsCommonUserVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonUserVariableTotalSize
) > mVariableModuleGlobal
->CommonMaxUserVariableSpace
))) {
2530 if (IsCommonUserVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonUserVariableTotalSize
) > mVariableModuleGlobal
->CommonMaxUserVariableSpace
)) {
2531 RecordVarErrorFlag (VAR_ERROR_FLAG_USER_ERROR
, VariableName
, VendorGuid
, Attributes
, VarSize
);
2533 if (IsCommonVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonVariableTotalSize
) > mVariableModuleGlobal
->CommonRuntimeVariableSpace
)) {
2534 RecordVarErrorFlag (VAR_ERROR_FLAG_SYSTEM_ERROR
, VariableName
, VendorGuid
, Attributes
, VarSize
);
2536 Status
= EFI_OUT_OF_RESOURCES
;
2540 // Perform garbage collection & reclaim operation, and integrate the new variable at the same time.
2543 mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
,
2544 &mVariableModuleGlobal
->NonVolatileLastVariableOffset
,
2548 HEADER_ALIGN (VarSize
)
2550 if (!EFI_ERROR (Status
)) {
2552 // The new variable has been integrated successfully during reclaiming.
2554 if (Variable
->CurrPtr
!= NULL
) {
2555 CacheVariable
->CurrPtr
= (VARIABLE_HEADER
*)((UINTN
) CacheVariable
->StartPtr
+ ((UINTN
) Variable
->CurrPtr
- (UINTN
) Variable
->StartPtr
));
2556 CacheVariable
->InDeletedTransitionPtr
= NULL
;
2558 UpdateVariableInfo (VariableName
, VendorGuid
, FALSE
, FALSE
, TRUE
, FALSE
, FALSE
);
2559 FlushHobVariableToFlash (VariableName
, VendorGuid
);
2561 if (IsCommonUserVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonUserVariableTotalSize
) > mVariableModuleGlobal
->CommonMaxUserVariableSpace
)) {
2562 RecordVarErrorFlag (VAR_ERROR_FLAG_USER_ERROR
, VariableName
, VendorGuid
, Attributes
, VarSize
);
2564 if (IsCommonVariable
&& ((VarSize
+ mVariableModuleGlobal
->CommonVariableTotalSize
) > mVariableModuleGlobal
->CommonVariableSpace
)) {
2565 RecordVarErrorFlag (VAR_ERROR_FLAG_SYSTEM_ERROR
, VariableName
, VendorGuid
, Attributes
, VarSize
);
2572 // 1. Write variable header
2573 // 2. Set variable state to header valid
2574 // 3. Write variable data
2575 // 4. Set variable state to valid
2580 CacheOffset
= mVariableModuleGlobal
->NonVolatileLastVariableOffset
;
2581 Status
= UpdateVariableStore (
2582 &mVariableModuleGlobal
->VariableGlobal
,
2586 mVariableModuleGlobal
->NonVolatileLastVariableOffset
,
2587 (UINT32
) GetVariableHeaderSize (),
2588 (UINT8
*) NextVariable
2591 if (EFI_ERROR (Status
)) {
2598 NextVariable
->State
= VAR_HEADER_VALID_ONLY
;
2599 Status
= UpdateVariableStore (
2600 &mVariableModuleGlobal
->VariableGlobal
,
2604 mVariableModuleGlobal
->NonVolatileLastVariableOffset
+ OFFSET_OF (VARIABLE_HEADER
, State
),
2606 &NextVariable
->State
2609 if (EFI_ERROR (Status
)) {
2615 Status
= UpdateVariableStore (
2616 &mVariableModuleGlobal
->VariableGlobal
,
2620 mVariableModuleGlobal
->NonVolatileLastVariableOffset
+ GetVariableHeaderSize (),
2621 (UINT32
) (VarSize
- GetVariableHeaderSize ()),
2622 (UINT8
*) NextVariable
+ GetVariableHeaderSize ()
2625 if (EFI_ERROR (Status
)) {
2631 NextVariable
->State
= VAR_ADDED
;
2632 Status
= UpdateVariableStore (
2633 &mVariableModuleGlobal
->VariableGlobal
,
2637 mVariableModuleGlobal
->NonVolatileLastVariableOffset
+ OFFSET_OF (VARIABLE_HEADER
, State
),
2639 &NextVariable
->State
2642 if (EFI_ERROR (Status
)) {
2646 mVariableModuleGlobal
->NonVolatileLastVariableOffset
+= HEADER_ALIGN (VarSize
);
2648 if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != 0) {
2649 mVariableModuleGlobal
->HwErrVariableTotalSize
+= HEADER_ALIGN (VarSize
);
2651 mVariableModuleGlobal
->CommonVariableTotalSize
+= HEADER_ALIGN (VarSize
);
2652 if (IsCommonUserVariable
) {
2653 mVariableModuleGlobal
->CommonUserVariableTotalSize
+= HEADER_ALIGN (VarSize
);
2657 // update the memory copy of Flash region.
2659 CopyMem ((UINT8
*)mNvVariableCache
+ CacheOffset
, (UINT8
*)NextVariable
, VarSize
);
2662 // Create a volatile variable.
2666 if ((UINT32
) (VarSize
+ mVariableModuleGlobal
->VolatileLastVariableOffset
) >
2667 ((VARIABLE_STORE_HEADER
*) ((UINTN
) (mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
)))->Size
) {
2669 // Perform garbage collection & reclaim operation, and integrate the new variable at the same time.
2672 mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
,
2673 &mVariableModuleGlobal
->VolatileLastVariableOffset
,
2677 HEADER_ALIGN (VarSize
)
2679 if (!EFI_ERROR (Status
)) {
2681 // The new variable has been integrated successfully during reclaiming.
2683 if (Variable
->CurrPtr
!= NULL
) {
2684 CacheVariable
->CurrPtr
= (VARIABLE_HEADER
*)((UINTN
) CacheVariable
->StartPtr
+ ((UINTN
) Variable
->CurrPtr
- (UINTN
) Variable
->StartPtr
));
2685 CacheVariable
->InDeletedTransitionPtr
= NULL
;
2687 UpdateVariableInfo (VariableName
, VendorGuid
, TRUE
, FALSE
, TRUE
, FALSE
, FALSE
);
2692 NextVariable
->State
= VAR_ADDED
;
2693 Status
= UpdateVariableStore (
2694 &mVariableModuleGlobal
->VariableGlobal
,
2698 mVariableModuleGlobal
->VolatileLastVariableOffset
,
2700 (UINT8
*) NextVariable
2703 if (EFI_ERROR (Status
)) {
2707 mVariableModuleGlobal
->VolatileLastVariableOffset
+= HEADER_ALIGN (VarSize
);
2711 // Mark the old variable as deleted.
2713 if (!EFI_ERROR (Status
) && Variable
->CurrPtr
!= NULL
) {
2714 if (Variable
->InDeletedTransitionPtr
!= NULL
) {
2716 // Both ADDED and IN_DELETED_TRANSITION old variable are present,
2717 // set IN_DELETED_TRANSITION one to DELETED state first.
2719 ASSERT (CacheVariable
->InDeletedTransitionPtr
!= NULL
);
2720 State
= CacheVariable
->InDeletedTransitionPtr
->State
;
2721 State
&= VAR_DELETED
;
2722 Status
= UpdateVariableStore (
2723 &mVariableModuleGlobal
->VariableGlobal
,
2727 (UINTN
) &Variable
->InDeletedTransitionPtr
->State
,
2731 if (!EFI_ERROR (Status
)) {
2732 if (!Variable
->Volatile
) {
2733 CacheVariable
->InDeletedTransitionPtr
->State
= State
;
2740 State
= Variable
->CurrPtr
->State
;
2741 State
&= VAR_DELETED
;
2743 Status
= UpdateVariableStore (
2744 &mVariableModuleGlobal
->VariableGlobal
,
2748 (UINTN
) &Variable
->CurrPtr
->State
,
2752 if (!EFI_ERROR (Status
) && !Variable
->Volatile
) {
2753 CacheVariable
->CurrPtr
->State
= State
;
2757 if (!EFI_ERROR (Status
)) {
2758 UpdateVariableInfo (VariableName
, VendorGuid
, Volatile
, FALSE
, TRUE
, FALSE
, FALSE
);
2760 FlushHobVariableToFlash (VariableName
, VendorGuid
);
2770 This code finds variable in storage blocks (Volatile or Non-Volatile).
2772 Caution: This function may receive untrusted input.
2773 This function may be invoked in SMM mode, and datasize is external input.
2774 This function will do basic validation, before parse the data.
2776 @param VariableName Name of Variable to be found.
2777 @param VendorGuid Variable vendor GUID.
2778 @param Attributes Attribute value of the variable found.
2779 @param DataSize Size of Data found. If size is less than the
2780 data, this value contains the required size.
2781 @param Data The buffer to return the contents of the variable. May be NULL
2782 with a zero DataSize in order to determine the size buffer needed.
2784 @return EFI_INVALID_PARAMETER Invalid parameter.
2785 @return EFI_SUCCESS Find the specified variable.
2786 @return EFI_NOT_FOUND Not found.
2787 @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.
2792 VariableServiceGetVariable (
2793 IN CHAR16
*VariableName
,
2794 IN EFI_GUID
*VendorGuid
,
2795 OUT UINT32
*Attributes OPTIONAL
,
2796 IN OUT UINTN
*DataSize
,
2797 OUT VOID
*Data OPTIONAL
2801 VARIABLE_POINTER_TRACK Variable
;
2804 if (VariableName
== NULL
|| VendorGuid
== NULL
|| DataSize
== NULL
) {
2805 return EFI_INVALID_PARAMETER
;
2808 if (VariableName
[0] == 0) {
2809 return EFI_NOT_FOUND
;
2812 AcquireLockOnlyAtBootTime(&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
2814 Status
= FindVariable (VariableName
, VendorGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
2815 if (Variable
.CurrPtr
== NULL
|| EFI_ERROR (Status
)) {
2822 VarDataSize
= DataSizeOfVariable (Variable
.CurrPtr
);
2823 ASSERT (VarDataSize
!= 0);
2825 if (*DataSize
>= VarDataSize
) {
2827 Status
= EFI_INVALID_PARAMETER
;
2831 CopyMem (Data
, GetVariableDataPtr (Variable
.CurrPtr
), VarDataSize
);
2832 if (Attributes
!= NULL
) {
2833 *Attributes
= Variable
.CurrPtr
->Attributes
;
2836 *DataSize
= VarDataSize
;
2837 UpdateVariableInfo (VariableName
, VendorGuid
, Variable
.Volatile
, TRUE
, FALSE
, FALSE
, FALSE
);
2839 Status
= EFI_SUCCESS
;
2842 *DataSize
= VarDataSize
;
2843 Status
= EFI_BUFFER_TOO_SMALL
;
2848 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
2853 This code Finds the Next available variable.
2855 Caution: This function may receive untrusted input.
2856 This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
2858 @param[in] VariableName Pointer to variable name.
2859 @param[in] VendorGuid Variable Vendor Guid.
2860 @param[out] VariablePtr Pointer to variable header address.
2862 @retval EFI_SUCCESS The function completed successfully.
2863 @retval EFI_NOT_FOUND The next variable was not found.
2864 @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while VendorGuid is NULL.
2865 @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and
2866 GUID of an existing variable.
2871 VariableServiceGetNextVariableInternal (
2872 IN CHAR16
*VariableName
,
2873 IN EFI_GUID
*VendorGuid
,
2874 OUT VARIABLE_HEADER
**VariablePtr
2877 VARIABLE_STORE_TYPE Type
;
2878 VARIABLE_POINTER_TRACK Variable
;
2879 VARIABLE_POINTER_TRACK VariableInHob
;
2880 VARIABLE_POINTER_TRACK VariablePtrTrack
;
2882 VARIABLE_STORE_HEADER
*VariableStoreHeader
[VariableStoreTypeMax
];
2884 Status
= FindVariable (VariableName
, VendorGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
2885 if (Variable
.CurrPtr
== NULL
|| EFI_ERROR (Status
)) {
2887 // For VariableName is an empty string, FindVariable() will try to find and return
2888 // the first qualified variable, and if FindVariable() returns error (EFI_NOT_FOUND)
2889 // as no any variable is found, still go to return the error (EFI_NOT_FOUND).
2891 if (VariableName
[0] != 0) {
2893 // For VariableName is not an empty string, and FindVariable() returns error as
2894 // VariableName and VendorGuid are not a name and GUID of an existing variable,
2895 // there is no way to get next variable, follow spec to return EFI_INVALID_PARAMETER.
2897 Status
= EFI_INVALID_PARAMETER
;
2902 if (VariableName
[0] != 0) {
2904 // If variable name is not NULL, get next variable.
2906 Variable
.CurrPtr
= GetNextVariablePtr (Variable
.CurrPtr
);
2910 // 0: Volatile, 1: HOB, 2: Non-Volatile.
2911 // The index and attributes mapping must be kept in this order as FindVariable
2912 // makes use of this mapping to implement search algorithm.
2914 VariableStoreHeader
[VariableStoreTypeVolatile
] = (VARIABLE_STORE_HEADER
*) (UINTN
) mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
;
2915 VariableStoreHeader
[VariableStoreTypeHob
] = (VARIABLE_STORE_HEADER
*) (UINTN
) mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
;
2916 VariableStoreHeader
[VariableStoreTypeNv
] = mNvVariableCache
;
2920 // Switch from Volatile to HOB, to Non-Volatile.
2922 while (!IsValidVariableHeader (Variable
.CurrPtr
, Variable
.EndPtr
)) {
2924 // Find current storage index
2926 for (Type
= (VARIABLE_STORE_TYPE
) 0; Type
< VariableStoreTypeMax
; Type
++) {
2927 if ((VariableStoreHeader
[Type
] != NULL
) && (Variable
.StartPtr
== GetStartPointer (VariableStoreHeader
[Type
]))) {
2931 ASSERT (Type
< VariableStoreTypeMax
);
2933 // Switch to next storage
2935 for (Type
++; Type
< VariableStoreTypeMax
; Type
++) {
2936 if (VariableStoreHeader
[Type
] != NULL
) {
2941 // Capture the case that
2942 // 1. current storage is the last one, or
2943 // 2. no further storage
2945 if (Type
== VariableStoreTypeMax
) {
2946 Status
= EFI_NOT_FOUND
;
2949 Variable
.StartPtr
= GetStartPointer (VariableStoreHeader
[Type
]);
2950 Variable
.EndPtr
= GetEndPointer (VariableStoreHeader
[Type
]);
2951 Variable
.CurrPtr
= Variable
.StartPtr
;
2955 // Variable is found
2957 if (Variable
.CurrPtr
->State
== VAR_ADDED
|| Variable
.CurrPtr
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
2958 if (!AtRuntime () || ((Variable
.CurrPtr
->Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) != 0)) {
2959 if (Variable
.CurrPtr
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
2961 // If it is a IN_DELETED_TRANSITION variable,
2962 // and there is also a same ADDED one at the same time,
2965 VariablePtrTrack
.StartPtr
= Variable
.StartPtr
;
2966 VariablePtrTrack
.EndPtr
= Variable
.EndPtr
;
2967 Status
= FindVariableEx (
2968 GetVariableNamePtr (Variable
.CurrPtr
),
2969 GetVendorGuidPtr (Variable
.CurrPtr
),
2973 if (!EFI_ERROR (Status
) && VariablePtrTrack
.CurrPtr
->State
== VAR_ADDED
) {
2974 Variable
.CurrPtr
= GetNextVariablePtr (Variable
.CurrPtr
);
2980 // Don't return NV variable when HOB overrides it
2982 if ((VariableStoreHeader
[VariableStoreTypeHob
] != NULL
) && (VariableStoreHeader
[VariableStoreTypeNv
] != NULL
) &&
2983 (Variable
.StartPtr
== GetStartPointer (VariableStoreHeader
[VariableStoreTypeNv
]))
2985 VariableInHob
.StartPtr
= GetStartPointer (VariableStoreHeader
[VariableStoreTypeHob
]);
2986 VariableInHob
.EndPtr
= GetEndPointer (VariableStoreHeader
[VariableStoreTypeHob
]);
2987 Status
= FindVariableEx (
2988 GetVariableNamePtr (Variable
.CurrPtr
),
2989 GetVendorGuidPtr (Variable
.CurrPtr
),
2993 if (!EFI_ERROR (Status
)) {
2994 Variable
.CurrPtr
= GetNextVariablePtr (Variable
.CurrPtr
);
2999 *VariablePtr
= Variable
.CurrPtr
;
3000 Status
= EFI_SUCCESS
;
3005 Variable
.CurrPtr
= GetNextVariablePtr (Variable
.CurrPtr
);
3014 This code Finds the Next available variable.
3016 Caution: This function may receive untrusted input.
3017 This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
3019 @param VariableNameSize The size of the VariableName buffer. The size must be large
3020 enough to fit input string supplied in VariableName buffer.
3021 @param VariableName Pointer to variable name.
3022 @param VendorGuid Variable Vendor Guid.
3024 @retval EFI_SUCCESS The function completed successfully.
3025 @retval EFI_NOT_FOUND The next variable was not found.
3026 @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.
3027 VariableNameSize has been updated with the size needed to complete the request.
3028 @retval EFI_INVALID_PARAMETER VariableNameSize is NULL.
3029 @retval EFI_INVALID_PARAMETER VariableName is NULL.
3030 @retval EFI_INVALID_PARAMETER VendorGuid is NULL.
3031 @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and
3032 GUID of an existing variable.
3033 @retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of
3034 the input VariableName buffer.
3039 VariableServiceGetNextVariableName (
3040 IN OUT UINTN
*VariableNameSize
,
3041 IN OUT CHAR16
*VariableName
,
3042 IN OUT EFI_GUID
*VendorGuid
3048 VARIABLE_HEADER
*VariablePtr
;
3050 if (VariableNameSize
== NULL
|| VariableName
== NULL
|| VendorGuid
== NULL
) {
3051 return EFI_INVALID_PARAMETER
;
3055 // Calculate the possible maximum length of name string, including the Null terminator.
3057 MaxLen
= *VariableNameSize
/ sizeof (CHAR16
);
3058 if ((MaxLen
== 0) || (StrnLenS (VariableName
, MaxLen
) == MaxLen
)) {
3060 // Null-terminator is not found in the first VariableNameSize bytes of the input VariableName buffer,
3061 // follow spec to return EFI_INVALID_PARAMETER.
3063 return EFI_INVALID_PARAMETER
;
3066 AcquireLockOnlyAtBootTime(&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3068 Status
= VariableServiceGetNextVariableInternal (VariableName
, VendorGuid
, &VariablePtr
);
3069 if (!EFI_ERROR (Status
)) {
3070 VarNameSize
= NameSizeOfVariable (VariablePtr
);
3071 ASSERT (VarNameSize
!= 0);
3072 if (VarNameSize
<= *VariableNameSize
) {
3073 CopyMem (VariableName
, GetVariableNamePtr (VariablePtr
), VarNameSize
);
3074 CopyMem (VendorGuid
, GetVendorGuidPtr (VariablePtr
), sizeof (EFI_GUID
));
3075 Status
= EFI_SUCCESS
;
3077 Status
= EFI_BUFFER_TOO_SMALL
;
3080 *VariableNameSize
= VarNameSize
;
3083 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3089 This code sets variable in storage blocks (Volatile or Non-Volatile).
3091 Caution: This function may receive untrusted input.
3092 This function may be invoked in SMM mode, and datasize and data are external input.
3093 This function will do basic validation, before parse the data.
3094 This function will parse the authentication carefully to avoid security issues, like
3095 buffer overflow, integer overflow.
3096 This function will check attribute carefully to avoid authentication bypass.
3098 @param VariableName Name of Variable to be found.
3099 @param VendorGuid Variable vendor GUID.
3100 @param Attributes Attribute value of the variable found
3101 @param DataSize Size of Data found. If size is less than the
3102 data, this value contains the required size.
3103 @param Data Data pointer.
3105 @return EFI_INVALID_PARAMETER Invalid parameter.
3106 @return EFI_SUCCESS Set successfully.
3107 @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.
3108 @return EFI_NOT_FOUND Not found.
3109 @return EFI_WRITE_PROTECTED Variable is read-only.
3114 VariableServiceSetVariable (
3115 IN CHAR16
*VariableName
,
3116 IN EFI_GUID
*VendorGuid
,
3117 IN UINT32 Attributes
,
3122 VARIABLE_POINTER_TRACK Variable
;
3124 VARIABLE_HEADER
*NextVariable
;
3125 EFI_PHYSICAL_ADDRESS Point
;
3129 // Check input parameters.
3131 if (VariableName
== NULL
|| VariableName
[0] == 0 || VendorGuid
== NULL
) {
3132 return EFI_INVALID_PARAMETER
;
3135 if (DataSize
!= 0 && Data
== NULL
) {
3136 return EFI_INVALID_PARAMETER
;
3140 // Check for reserverd bit in variable attribute.
3141 // EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is deprecated but we still allow
3142 // the delete operation of common authenticated variable at user physical presence.
3143 // So leave EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS attribute check to AuthVariableLib
3145 if ((Attributes
& (~(EFI_VARIABLE_ATTRIBUTES_MASK
| EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
))) != 0) {
3146 return EFI_INVALID_PARAMETER
;
3150 // Make sure if runtime bit is set, boot service bit is set also.
3152 if ((Attributes
& (EFI_VARIABLE_RUNTIME_ACCESS
| EFI_VARIABLE_BOOTSERVICE_ACCESS
)) == EFI_VARIABLE_RUNTIME_ACCESS
) {
3153 if ((Attributes
& EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
) != 0) {
3154 return EFI_UNSUPPORTED
;
3156 return EFI_INVALID_PARAMETER
;
3158 } else if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
3159 if (!mVariableModuleGlobal
->VariableGlobal
.AuthSupport
) {
3161 // Not support authenticated variable write.
3163 return EFI_INVALID_PARAMETER
;
3165 } else if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != 0) {
3166 if (PcdGet32 (PcdHwErrStorageSize
) == 0) {
3168 // Not support harware error record variable variable.
3170 return EFI_INVALID_PARAMETER
;
3175 // EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS and EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS attribute
3176 // cannot be set both.
3178 if (((Attributes
& EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
)
3179 && ((Attributes
& EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
)) {
3180 return EFI_UNSUPPORTED
;
3183 if ((Attributes
& EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
) {
3185 // If DataSize == AUTHINFO_SIZE and then PayloadSize is 0.
3186 // Maybe it's the delete operation of common authenticated variable at user physical presence.
3188 if (DataSize
!= AUTHINFO_SIZE
) {
3189 return EFI_UNSUPPORTED
;
3191 PayloadSize
= DataSize
- AUTHINFO_SIZE
;
3192 } else if ((Attributes
& EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
) {
3194 // Sanity check for EFI_VARIABLE_AUTHENTICATION_2 descriptor.
3196 if (DataSize
< OFFSET_OF_AUTHINFO2_CERT_DATA
||
3197 ((EFI_VARIABLE_AUTHENTICATION_2
*) Data
)->AuthInfo
.Hdr
.dwLength
> DataSize
- (OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2
, AuthInfo
)) ||
3198 ((EFI_VARIABLE_AUTHENTICATION_2
*) Data
)->AuthInfo
.Hdr
.dwLength
< OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID
, CertData
)) {
3199 return EFI_SECURITY_VIOLATION
;
3202 // The MemoryLoadFence() call here is to ensure the above sanity check
3203 // for the EFI_VARIABLE_AUTHENTICATION_2 descriptor has been completed
3204 // before the execution of subsequent codes.
3207 PayloadSize
= DataSize
- AUTHINFO2_SIZE (Data
);
3209 PayloadSize
= DataSize
;
3212 if ((UINTN
)(~0) - PayloadSize
< StrSize(VariableName
)){
3214 // Prevent whole variable size overflow
3216 return EFI_INVALID_PARAMETER
;
3220 // The size of the VariableName, including the Unicode Null in bytes plus
3221 // the DataSize is limited to maximum size of PcdGet32 (PcdMaxHardwareErrorVariableSize)
3222 // bytes for HwErrRec#### variable.
3224 if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
3225 if (StrSize (VariableName
) + PayloadSize
> PcdGet32 (PcdMaxHardwareErrorVariableSize
) - GetVariableHeaderSize ()) {
3226 return EFI_INVALID_PARAMETER
;
3230 // The size of the VariableName, including the Unicode Null in bytes plus
3231 // the DataSize is limited to maximum size of Max(Auth|Volatile)VariableSize bytes.
3233 if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
3234 if (StrSize (VariableName
) + PayloadSize
> mVariableModuleGlobal
->MaxAuthVariableSize
- GetVariableHeaderSize ()) {
3235 return EFI_INVALID_PARAMETER
;
3237 } else if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
3238 if (StrSize (VariableName
) + PayloadSize
> mVariableModuleGlobal
->MaxVariableSize
- GetVariableHeaderSize ()) {
3239 return EFI_INVALID_PARAMETER
;
3242 if (StrSize (VariableName
) + PayloadSize
> mVariableModuleGlobal
->MaxVolatileVariableSize
- GetVariableHeaderSize ()) {
3243 return EFI_INVALID_PARAMETER
;
3249 // Special Handling for MOR Lock variable.
3251 Status
= SetVariableCheckHandlerMor (VariableName
, VendorGuid
, Attributes
, PayloadSize
, (VOID
*) ((UINTN
) Data
+ DataSize
- PayloadSize
));
3252 if (Status
== EFI_ALREADY_STARTED
) {
3254 // EFI_ALREADY_STARTED means the SetVariable() action is handled inside of SetVariableCheckHandlerMor().
3255 // Variable driver can just return SUCCESS.
3259 if (EFI_ERROR (Status
)) {
3263 Status
= VarCheckLibSetVariableCheck (VariableName
, VendorGuid
, Attributes
, PayloadSize
, (VOID
*) ((UINTN
) Data
+ DataSize
- PayloadSize
), mRequestSource
);
3264 if (EFI_ERROR (Status
)) {
3268 AcquireLockOnlyAtBootTime(&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3271 // Consider reentrant in MCA/INIT/NMI. It needs be reupdated.
3273 if (1 < InterlockedIncrement (&mVariableModuleGlobal
->VariableGlobal
.ReentrantState
)) {
3274 Point
= mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
;
3276 // Parse non-volatile variable data and get last variable offset.
3278 NextVariable
= GetStartPointer ((VARIABLE_STORE_HEADER
*) (UINTN
) Point
);
3279 while (IsValidVariableHeader (NextVariable
, GetEndPointer ((VARIABLE_STORE_HEADER
*) (UINTN
) Point
))) {
3280 NextVariable
= GetNextVariablePtr (NextVariable
);
3282 mVariableModuleGlobal
->NonVolatileLastVariableOffset
= (UINTN
) NextVariable
- (UINTN
) Point
;
3286 // Check whether the input variable is already existed.
3288 Status
= FindVariable (VariableName
, VendorGuid
, &Variable
, &mVariableModuleGlobal
->VariableGlobal
, TRUE
);
3289 if (!EFI_ERROR (Status
)) {
3290 if (((Variable
.CurrPtr
->Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) == 0) && AtRuntime ()) {
3291 Status
= EFI_WRITE_PROTECTED
;
3294 if (Attributes
!= 0 && (Attributes
& (~EFI_VARIABLE_APPEND_WRITE
)) != Variable
.CurrPtr
->Attributes
) {
3296 // If a preexisting variable is rewritten with different attributes, SetVariable() shall not
3297 // modify the variable and shall return EFI_INVALID_PARAMETER. Two exceptions to this rule:
3298 // 1. No access attributes specified
3299 // 2. The only attribute differing is EFI_VARIABLE_APPEND_WRITE
3301 Status
= EFI_INVALID_PARAMETER
;
3302 DEBUG ((EFI_D_INFO
, "[Variable]: Rewritten a preexisting variable(0x%08x) with different attributes(0x%08x) - %g:%s\n", Variable
.CurrPtr
->Attributes
, Attributes
, VendorGuid
, VariableName
));
3307 if (!FeaturePcdGet (PcdUefiVariableDefaultLangDeprecate
)) {
3309 // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.
3311 Status
= AutoUpdateLangVariable (VariableName
, Data
, DataSize
);
3312 if (EFI_ERROR (Status
)) {
3314 // The auto update operation failed, directly return to avoid inconsistency between PlatformLang and Lang.
3320 if (mVariableModuleGlobal
->VariableGlobal
.AuthSupport
) {
3321 Status
= AuthVariableLibProcessVariable (VariableName
, VendorGuid
, Data
, DataSize
, Attributes
);
3323 Status
= UpdateVariable (VariableName
, VendorGuid
, Data
, DataSize
, Attributes
, 0, 0, &Variable
, NULL
);
3327 InterlockedDecrement (&mVariableModuleGlobal
->VariableGlobal
.ReentrantState
);
3328 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3330 if (!AtRuntime ()) {
3331 if (!EFI_ERROR (Status
)) {
3344 This code returns information about the EFI variables.
3346 Caution: This function may receive untrusted input.
3347 This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
3349 @param Attributes Attributes bitmask to specify the type of variables
3350 on which to return information.
3351 @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
3352 for the EFI variables associated with the attributes specified.
3353 @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
3354 for EFI variables associated with the attributes specified.
3355 @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
3356 associated with the attributes specified.
3358 @return EFI_SUCCESS Query successfully.
3363 VariableServiceQueryVariableInfoInternal (
3364 IN UINT32 Attributes
,
3365 OUT UINT64
*MaximumVariableStorageSize
,
3366 OUT UINT64
*RemainingVariableStorageSize
,
3367 OUT UINT64
*MaximumVariableSize
3370 VARIABLE_HEADER
*Variable
;
3371 VARIABLE_HEADER
*NextVariable
;
3372 UINT64 VariableSize
;
3373 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
3374 UINT64 CommonVariableTotalSize
;
3375 UINT64 HwErrVariableTotalSize
;
3377 VARIABLE_POINTER_TRACK VariablePtrTrack
;
3379 CommonVariableTotalSize
= 0;
3380 HwErrVariableTotalSize
= 0;
3382 if((Attributes
& EFI_VARIABLE_NON_VOLATILE
) == 0) {
3384 // Query is Volatile related.
3386 VariableStoreHeader
= (VARIABLE_STORE_HEADER
*) ((UINTN
) mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
);
3389 // Query is Non-Volatile related.
3391 VariableStoreHeader
= mNvVariableCache
;
3395 // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize
3396 // with the storage size (excluding the storage header size).
3398 *MaximumVariableStorageSize
= VariableStoreHeader
->Size
- sizeof (VARIABLE_STORE_HEADER
);
3401 // Harware error record variable needs larger size.
3403 if ((Attributes
& (EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) == (EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
3404 *MaximumVariableStorageSize
= PcdGet32 (PcdHwErrStorageSize
);
3405 *MaximumVariableSize
= PcdGet32 (PcdMaxHardwareErrorVariableSize
) - GetVariableHeaderSize ();
3407 if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
3409 *MaximumVariableStorageSize
= mVariableModuleGlobal
->CommonRuntimeVariableSpace
;
3411 *MaximumVariableStorageSize
= mVariableModuleGlobal
->CommonVariableSpace
;
3416 // Let *MaximumVariableSize be Max(Auth|Volatile)VariableSize with the exception of the variable header size.
3418 if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
3419 *MaximumVariableSize
= mVariableModuleGlobal
->MaxAuthVariableSize
- GetVariableHeaderSize ();
3420 } else if ((Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0) {
3421 *MaximumVariableSize
= mVariableModuleGlobal
->MaxVariableSize
- GetVariableHeaderSize ();
3423 *MaximumVariableSize
= mVariableModuleGlobal
->MaxVolatileVariableSize
- GetVariableHeaderSize ();
3428 // Point to the starting address of the variables.
3430 Variable
= GetStartPointer (VariableStoreHeader
);
3433 // Now walk through the related variable store.
3435 while (IsValidVariableHeader (Variable
, GetEndPointer (VariableStoreHeader
))) {
3436 NextVariable
= GetNextVariablePtr (Variable
);
3437 VariableSize
= (UINT64
) (UINTN
) NextVariable
- (UINT64
) (UINTN
) Variable
;
3441 // We don't take the state of the variables in mind
3442 // when calculating RemainingVariableStorageSize,
3443 // since the space occupied by variables not marked with
3444 // VAR_ADDED is not allowed to be reclaimed in Runtime.
3446 if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
3447 HwErrVariableTotalSize
+= VariableSize
;
3449 CommonVariableTotalSize
+= VariableSize
;
3453 // Only care about Variables with State VAR_ADDED, because
3454 // the space not marked as VAR_ADDED is reclaimable now.
3456 if (Variable
->State
== VAR_ADDED
) {
3457 if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
3458 HwErrVariableTotalSize
+= VariableSize
;
3460 CommonVariableTotalSize
+= VariableSize
;
3462 } else if (Variable
->State
== (VAR_IN_DELETED_TRANSITION
& VAR_ADDED
)) {
3464 // If it is a IN_DELETED_TRANSITION variable,
3465 // and there is not also a same ADDED one at the same time,
3466 // this IN_DELETED_TRANSITION variable is valid.
3468 VariablePtrTrack
.StartPtr
= GetStartPointer (VariableStoreHeader
);
3469 VariablePtrTrack
.EndPtr
= GetEndPointer (VariableStoreHeader
);
3470 Status
= FindVariableEx (
3471 GetVariableNamePtr (Variable
),
3472 GetVendorGuidPtr (Variable
),
3476 if (!EFI_ERROR (Status
) && VariablePtrTrack
.CurrPtr
->State
!= VAR_ADDED
) {
3477 if ((Variable
->Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
3478 HwErrVariableTotalSize
+= VariableSize
;
3480 CommonVariableTotalSize
+= VariableSize
;
3487 // Go to the next one.
3489 Variable
= NextVariable
;
3492 if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
){
3493 *RemainingVariableStorageSize
= *MaximumVariableStorageSize
- HwErrVariableTotalSize
;
3495 if (*MaximumVariableStorageSize
< CommonVariableTotalSize
) {
3496 *RemainingVariableStorageSize
= 0;
3498 *RemainingVariableStorageSize
= *MaximumVariableStorageSize
- CommonVariableTotalSize
;
3502 if (*RemainingVariableStorageSize
< GetVariableHeaderSize ()) {
3503 *MaximumVariableSize
= 0;
3504 } else if ((*RemainingVariableStorageSize
- GetVariableHeaderSize ()) < *MaximumVariableSize
) {
3505 *MaximumVariableSize
= *RemainingVariableStorageSize
- GetVariableHeaderSize ();
3513 This code returns information about the EFI variables.
3515 Caution: This function may receive untrusted input.
3516 This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
3518 @param Attributes Attributes bitmask to specify the type of variables
3519 on which to return information.
3520 @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
3521 for the EFI variables associated with the attributes specified.
3522 @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
3523 for EFI variables associated with the attributes specified.
3524 @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
3525 associated with the attributes specified.
3527 @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
3528 @return EFI_SUCCESS Query successfully.
3529 @return EFI_UNSUPPORTED The attribute is not supported on this platform.
3534 VariableServiceQueryVariableInfo (
3535 IN UINT32 Attributes
,
3536 OUT UINT64
*MaximumVariableStorageSize
,
3537 OUT UINT64
*RemainingVariableStorageSize
,
3538 OUT UINT64
*MaximumVariableSize
3543 if(MaximumVariableStorageSize
== NULL
|| RemainingVariableStorageSize
== NULL
|| MaximumVariableSize
== NULL
|| Attributes
== 0) {
3544 return EFI_INVALID_PARAMETER
;
3547 if ((Attributes
& EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
) != 0) {
3549 // Deprecated attribute, make this check as highest priority.
3551 return EFI_UNSUPPORTED
;
3554 if ((Attributes
& EFI_VARIABLE_ATTRIBUTES_MASK
) == 0) {
3556 // Make sure the Attributes combination is supported by the platform.
3558 return EFI_UNSUPPORTED
;
3559 } else if ((Attributes
& (EFI_VARIABLE_RUNTIME_ACCESS
| EFI_VARIABLE_BOOTSERVICE_ACCESS
)) == EFI_VARIABLE_RUNTIME_ACCESS
) {
3561 // Make sure if runtime bit is set, boot service bit is set also.
3563 return EFI_INVALID_PARAMETER
;
3564 } else if (AtRuntime () && ((Attributes
& EFI_VARIABLE_RUNTIME_ACCESS
) == 0)) {
3566 // Make sure RT Attribute is set if we are in Runtime phase.
3568 return EFI_INVALID_PARAMETER
;
3569 } else if ((Attributes
& (EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD
) {
3571 // Make sure Hw Attribute is set with NV.
3573 return EFI_INVALID_PARAMETER
;
3574 } else if ((Attributes
& VARIABLE_ATTRIBUTE_AT_AW
) != 0) {
3575 if (!mVariableModuleGlobal
->VariableGlobal
.AuthSupport
) {
3577 // Not support authenticated variable write.
3579 return EFI_UNSUPPORTED
;
3581 } else if ((Attributes
& EFI_VARIABLE_HARDWARE_ERROR_RECORD
) != 0) {
3582 if (PcdGet32 (PcdHwErrStorageSize
) == 0) {
3584 // Not support harware error record variable variable.
3586 return EFI_UNSUPPORTED
;
3590 AcquireLockOnlyAtBootTime(&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3592 Status
= VariableServiceQueryVariableInfoInternal (
3594 MaximumVariableStorageSize
,
3595 RemainingVariableStorageSize
,
3599 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3604 This function reclaims variable storage if free size is below the threshold.
3606 Caution: This function may be invoked at SMM mode.
3607 Care must be taken to make sure not security issue.
3616 UINTN RemainingCommonRuntimeVariableSpace
;
3617 UINTN RemainingHwErrVariableSpace
;
3618 STATIC BOOLEAN Reclaimed
;
3621 // This function will be called only once at EndOfDxe or ReadyToBoot event.
3628 Status
= EFI_SUCCESS
;
3630 if (mVariableModuleGlobal
->CommonRuntimeVariableSpace
< mVariableModuleGlobal
->CommonVariableTotalSize
) {
3631 RemainingCommonRuntimeVariableSpace
= 0;
3633 RemainingCommonRuntimeVariableSpace
= mVariableModuleGlobal
->CommonRuntimeVariableSpace
- mVariableModuleGlobal
->CommonVariableTotalSize
;
3636 RemainingHwErrVariableSpace
= PcdGet32 (PcdHwErrStorageSize
) - mVariableModuleGlobal
->HwErrVariableTotalSize
;
3639 // Check if the free area is below a threshold.
3641 if (((RemainingCommonRuntimeVariableSpace
< mVariableModuleGlobal
->MaxVariableSize
) ||
3642 (RemainingCommonRuntimeVariableSpace
< mVariableModuleGlobal
->MaxAuthVariableSize
)) ||
3643 ((PcdGet32 (PcdHwErrStorageSize
) != 0) &&
3644 (RemainingHwErrVariableSpace
< PcdGet32 (PcdMaxHardwareErrorVariableSize
)))){
3646 mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
,
3647 &mVariableModuleGlobal
->NonVolatileLastVariableOffset
,
3653 ASSERT_EFI_ERROR (Status
);
3658 Get non-volatile maximum variable size.
3660 @return Non-volatile maximum variable size.
3664 GetNonVolatileMaxVariableSize (
3668 if (PcdGet32 (PcdHwErrStorageSize
) != 0) {
3669 return MAX (MAX (PcdGet32 (PcdMaxVariableSize
), PcdGet32 (PcdMaxAuthVariableSize
)),
3670 PcdGet32 (PcdMaxHardwareErrorVariableSize
));
3672 return MAX (PcdGet32 (PcdMaxVariableSize
), PcdGet32 (PcdMaxAuthVariableSize
));
3677 Get maximum variable size, covering both non-volatile and volatile variables.
3679 @return Maximum variable size.
3683 GetMaxVariableSize (
3687 UINTN MaxVariableSize
;
3689 MaxVariableSize
= GetNonVolatileMaxVariableSize();
3691 // The condition below fails implicitly if PcdMaxVolatileVariableSize equals
3692 // the default zero value.
3694 if (MaxVariableSize
< PcdGet32 (PcdMaxVolatileVariableSize
)) {
3695 MaxVariableSize
= PcdGet32 (PcdMaxVolatileVariableSize
);
3697 return MaxVariableSize
;
3701 Init non-volatile variable store.
3703 @param[out] NvFvHeader Output pointer to non-volatile FV header address.
3705 @retval EFI_SUCCESS Function successfully executed.
3706 @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
3707 @retval EFI_VOLUME_CORRUPTED Variable Store or Firmware Volume for Variable Store is corrupted.
3711 InitNonVolatileVariableStore (
3712 OUT EFI_FIRMWARE_VOLUME_HEADER
**NvFvHeader
3715 EFI_FIRMWARE_VOLUME_HEADER
*FvHeader
;
3716 VARIABLE_HEADER
*Variable
;
3717 VARIABLE_HEADER
*NextVariable
;
3718 EFI_PHYSICAL_ADDRESS VariableStoreBase
;
3719 UINT64 VariableStoreLength
;
3721 EFI_HOB_GUID_TYPE
*GuidHob
;
3722 EFI_PHYSICAL_ADDRESS NvStorageBase
;
3723 UINT8
*NvStorageData
;
3724 UINT32 NvStorageSize
;
3725 FAULT_TOLERANT_WRITE_LAST_WRITE_DATA
*FtwLastWriteData
;
3726 UINT32 BackUpOffset
;
3728 UINT32 HwErrStorageSize
;
3729 UINT32 MaxUserNvVariableSpaceSize
;
3730 UINT32 BoottimeReservedNvVariableSpaceSize
;
3734 mVariableModuleGlobal
->FvbInstance
= NULL
;
3737 // Allocate runtime memory used for a memory copy of the FLASH region.
3738 // Keep the memory and the FLASH in sync as updates occur.
3740 NvStorageSize
= PcdGet32 (PcdFlashNvStorageVariableSize
);
3741 NvStorageData
= AllocateRuntimeZeroPool (NvStorageSize
);
3742 if (NvStorageData
== NULL
) {
3743 return EFI_OUT_OF_RESOURCES
;
3746 NvStorageBase
= (EFI_PHYSICAL_ADDRESS
) PcdGet64 (PcdFlashNvStorageVariableBase64
);
3747 if (NvStorageBase
== 0) {
3748 NvStorageBase
= (EFI_PHYSICAL_ADDRESS
) PcdGet32 (PcdFlashNvStorageVariableBase
);
3751 // Copy NV storage data to the memory buffer.
3753 CopyMem (NvStorageData
, (UINT8
*) (UINTN
) NvStorageBase
, NvStorageSize
);
3755 Status
= GetFtwProtocol ((VOID
**)&FtwProtocol
);
3757 // If FTW protocol has been installed, no need to check FTW last write data hob.
3759 if (EFI_ERROR (Status
)) {
3761 // Check the FTW last write data hob.
3763 GuidHob
= GetFirstGuidHob (&gEdkiiFaultTolerantWriteGuid
);
3764 if (GuidHob
!= NULL
) {
3765 FtwLastWriteData
= (FAULT_TOLERANT_WRITE_LAST_WRITE_DATA
*) GET_GUID_HOB_DATA (GuidHob
);
3766 if (FtwLastWriteData
->TargetAddress
== NvStorageBase
) {
3767 DEBUG ((EFI_D_INFO
, "Variable: NV storage is backed up in spare block: 0x%x\n", (UINTN
) FtwLastWriteData
->SpareAddress
));
3769 // Copy the backed up NV storage data to the memory buffer from spare block.
3771 CopyMem (NvStorageData
, (UINT8
*) (UINTN
) (FtwLastWriteData
->SpareAddress
), NvStorageSize
);
3772 } else if ((FtwLastWriteData
->TargetAddress
> NvStorageBase
) &&
3773 (FtwLastWriteData
->TargetAddress
< (NvStorageBase
+ NvStorageSize
))) {
3775 // Flash NV storage from the Offset is backed up in spare block.
3777 BackUpOffset
= (UINT32
) (FtwLastWriteData
->TargetAddress
- NvStorageBase
);
3778 BackUpSize
= NvStorageSize
- BackUpOffset
;
3779 DEBUG ((EFI_D_INFO
, "Variable: High partial NV storage from offset: %x is backed up in spare block: 0x%x\n", BackUpOffset
, (UINTN
) FtwLastWriteData
->SpareAddress
));
3781 // Copy the partial backed up NV storage data to the memory buffer from spare block.
3783 CopyMem (NvStorageData
+ BackUpOffset
, (UINT8
*) (UINTN
) FtwLastWriteData
->SpareAddress
, BackUpSize
);
3788 FvHeader
= (EFI_FIRMWARE_VOLUME_HEADER
*) NvStorageData
;
3791 // Check if the Firmware Volume is not corrupted
3793 if ((FvHeader
->Signature
!= EFI_FVH_SIGNATURE
) || (!CompareGuid (&gEfiSystemNvDataFvGuid
, &FvHeader
->FileSystemGuid
))) {
3794 FreePool (NvStorageData
);
3795 DEBUG ((EFI_D_ERROR
, "Firmware Volume for Variable Store is corrupted\n"));
3796 return EFI_VOLUME_CORRUPTED
;
3799 VariableStoreBase
= (UINTN
) FvHeader
+ FvHeader
->HeaderLength
;
3800 VariableStoreLength
= NvStorageSize
- FvHeader
->HeaderLength
;
3802 mNvFvHeaderCache
= FvHeader
;
3803 mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
= VariableStoreBase
;
3804 mNvVariableCache
= (VARIABLE_STORE_HEADER
*) (UINTN
) VariableStoreBase
;
3805 if (GetVariableStoreStatus (mNvVariableCache
) != EfiValid
) {
3806 FreePool (NvStorageData
);
3807 mNvFvHeaderCache
= NULL
;
3808 mNvVariableCache
= NULL
;
3809 DEBUG((EFI_D_ERROR
, "Variable Store header is corrupted\n"));
3810 return EFI_VOLUME_CORRUPTED
;
3812 ASSERT(mNvVariableCache
->Size
== VariableStoreLength
);
3814 ASSERT (sizeof (VARIABLE_STORE_HEADER
) <= VariableStoreLength
);
3816 mVariableModuleGlobal
->VariableGlobal
.AuthFormat
= (BOOLEAN
)(CompareGuid (&mNvVariableCache
->Signature
, &gEfiAuthenticatedVariableGuid
));
3818 HwErrStorageSize
= PcdGet32 (PcdHwErrStorageSize
);
3819 MaxUserNvVariableSpaceSize
= PcdGet32 (PcdMaxUserNvVariableSpaceSize
);
3820 BoottimeReservedNvVariableSpaceSize
= PcdGet32 (PcdBoottimeReservedNvVariableSpaceSize
);
3823 // Note that in EdkII variable driver implementation, Hardware Error Record type variable
3824 // is stored with common variable in the same NV region. So the platform integrator should
3825 // ensure that the value of PcdHwErrStorageSize is less than the value of
3826 // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)).
3828 ASSERT (HwErrStorageSize
< (VariableStoreLength
- sizeof (VARIABLE_STORE_HEADER
)));
3830 // Ensure that the value of PcdMaxUserNvVariableSpaceSize is less than the value of
3831 // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)) - PcdGet32 (PcdHwErrStorageSize).
3833 ASSERT (MaxUserNvVariableSpaceSize
< (VariableStoreLength
- sizeof (VARIABLE_STORE_HEADER
) - HwErrStorageSize
));
3835 // Ensure that the value of PcdBoottimeReservedNvVariableSpaceSize is less than the value of
3836 // (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)) - PcdGet32 (PcdHwErrStorageSize).
3838 ASSERT (BoottimeReservedNvVariableSpaceSize
< (VariableStoreLength
- sizeof (VARIABLE_STORE_HEADER
) - HwErrStorageSize
));
3840 mVariableModuleGlobal
->CommonVariableSpace
= ((UINTN
) VariableStoreLength
- sizeof (VARIABLE_STORE_HEADER
) - HwErrStorageSize
);
3841 mVariableModuleGlobal
->CommonMaxUserVariableSpace
= ((MaxUserNvVariableSpaceSize
!= 0) ? MaxUserNvVariableSpaceSize
: mVariableModuleGlobal
->CommonVariableSpace
);
3842 mVariableModuleGlobal
->CommonRuntimeVariableSpace
= mVariableModuleGlobal
->CommonVariableSpace
- BoottimeReservedNvVariableSpaceSize
;
3844 DEBUG ((EFI_D_INFO
, "Variable driver common space: 0x%x 0x%x 0x%x\n", mVariableModuleGlobal
->CommonVariableSpace
, mVariableModuleGlobal
->CommonMaxUserVariableSpace
, mVariableModuleGlobal
->CommonRuntimeVariableSpace
));
3847 // The max NV variable size should be < (VariableStoreLength - sizeof (VARIABLE_STORE_HEADER)).
3849 ASSERT (GetNonVolatileMaxVariableSize () < (VariableStoreLength
- sizeof (VARIABLE_STORE_HEADER
)));
3851 mVariableModuleGlobal
->MaxVariableSize
= PcdGet32 (PcdMaxVariableSize
);
3852 mVariableModuleGlobal
->MaxAuthVariableSize
= ((PcdGet32 (PcdMaxAuthVariableSize
) != 0) ? PcdGet32 (PcdMaxAuthVariableSize
) : mVariableModuleGlobal
->MaxVariableSize
);
3855 // Parse non-volatile variable data and get last variable offset.
3857 Variable
= GetStartPointer ((VARIABLE_STORE_HEADER
*)(UINTN
)VariableStoreBase
);
3858 while (IsValidVariableHeader (Variable
, GetEndPointer ((VARIABLE_STORE_HEADER
*)(UINTN
)VariableStoreBase
))) {
3859 NextVariable
= GetNextVariablePtr (Variable
);
3860 VariableSize
= (UINTN
) NextVariable
- (UINTN
) Variable
;
3861 if ((Variable
->Attributes
& (EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) == (EFI_VARIABLE_NON_VOLATILE
| EFI_VARIABLE_HARDWARE_ERROR_RECORD
)) {
3862 mVariableModuleGlobal
->HwErrVariableTotalSize
+= VariableSize
;
3864 mVariableModuleGlobal
->CommonVariableTotalSize
+= VariableSize
;
3867 Variable
= NextVariable
;
3869 mVariableModuleGlobal
->NonVolatileLastVariableOffset
= (UINTN
) Variable
- (UINTN
) VariableStoreBase
;
3871 *NvFvHeader
= FvHeader
;
3876 Flush the HOB variable to flash.
3878 @param[in] VariableName Name of variable has been updated or deleted.
3879 @param[in] VendorGuid Guid of variable has been updated or deleted.
3883 FlushHobVariableToFlash (
3884 IN CHAR16
*VariableName
,
3885 IN EFI_GUID
*VendorGuid
3889 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
3890 VARIABLE_HEADER
*Variable
;
3892 VARIABLE_POINTER_TRACK VariablePtrTrack
;
3898 // Flush the HOB variable to flash.
3900 if (mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
!= 0) {
3901 VariableStoreHeader
= (VARIABLE_STORE_HEADER
*) (UINTN
) mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
;
3903 // Set HobVariableBase to 0, it can avoid SetVariable to call back.
3905 mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
= 0;
3906 for ( Variable
= GetStartPointer (VariableStoreHeader
)
3907 ; IsValidVariableHeader (Variable
, GetEndPointer (VariableStoreHeader
))
3908 ; Variable
= GetNextVariablePtr (Variable
)
3910 if (Variable
->State
!= VAR_ADDED
) {
3912 // The HOB variable has been set to DELETED state in local.
3916 ASSERT ((Variable
->Attributes
& EFI_VARIABLE_NON_VOLATILE
) != 0);
3917 if (VendorGuid
== NULL
|| VariableName
== NULL
||
3918 !CompareGuid (VendorGuid
, GetVendorGuidPtr (Variable
)) ||
3919 StrCmp (VariableName
, GetVariableNamePtr (Variable
)) != 0) {
3920 VariableData
= GetVariableDataPtr (Variable
);
3921 FindVariable (GetVariableNamePtr (Variable
), GetVendorGuidPtr (Variable
), &VariablePtrTrack
, &mVariableModuleGlobal
->VariableGlobal
, FALSE
);
3922 Status
= UpdateVariable (
3923 GetVariableNamePtr (Variable
),
3924 GetVendorGuidPtr (Variable
),
3926 DataSizeOfVariable (Variable
),
3927 Variable
->Attributes
,
3933 DEBUG ((EFI_D_INFO
, "Variable driver flush the HOB variable to flash: %g %s %r\n", GetVendorGuidPtr (Variable
), GetVariableNamePtr (Variable
), Status
));
3936 // The updated or deleted variable is matched with this HOB variable.
3937 // Don't break here because we will try to set other HOB variables
3938 // since this variable could be set successfully.
3940 Status
= EFI_SUCCESS
;
3942 if (!EFI_ERROR (Status
)) {
3944 // If set variable successful, or the updated or deleted variable is matched with the HOB variable,
3945 // set the HOB variable to DELETED state in local.
3947 DEBUG ((EFI_D_INFO
, "Variable driver set the HOB variable to DELETED state in local: %g %s\n", GetVendorGuidPtr (Variable
), GetVariableNamePtr (Variable
)));
3948 Variable
->State
&= VAR_DELETED
;
3955 // We still have HOB variable(s) not flushed in flash.
3957 mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) VariableStoreHeader
;
3960 // All HOB variables have been flushed in flash.
3962 DEBUG ((EFI_D_INFO
, "Variable driver: all HOB variables have been flushed in flash.\n"));
3963 if (!AtRuntime ()) {
3964 FreePool ((VOID
*) VariableStoreHeader
);
3972 Initializes variable write service after FTW was ready.
3974 @retval EFI_SUCCESS Function successfully executed.
3975 @retval Others Fail to initialize the variable service.
3979 VariableWriteServiceInitialize (
3986 EFI_PHYSICAL_ADDRESS VariableStoreBase
;
3987 EFI_PHYSICAL_ADDRESS NvStorageBase
;
3988 VARIABLE_ENTRY_PROPERTY
*VariableEntry
;
3990 AcquireLockOnlyAtBootTime(&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
3992 NvStorageBase
= (EFI_PHYSICAL_ADDRESS
) PcdGet64 (PcdFlashNvStorageVariableBase64
);
3993 if (NvStorageBase
== 0) {
3994 NvStorageBase
= (EFI_PHYSICAL_ADDRESS
) PcdGet32 (PcdFlashNvStorageVariableBase
);
3996 VariableStoreBase
= NvStorageBase
+ (mNvFvHeaderCache
->HeaderLength
);
3999 // Let NonVolatileVariableBase point to flash variable store base directly after FTW ready.
4001 mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
= VariableStoreBase
;
4004 // Check if the free area is really free.
4006 for (Index
= mVariableModuleGlobal
->NonVolatileLastVariableOffset
; Index
< mNvVariableCache
->Size
; Index
++) {
4007 Data
= ((UINT8
*) mNvVariableCache
)[Index
];
4010 // There must be something wrong in variable store, do reclaim operation.
4013 mVariableModuleGlobal
->VariableGlobal
.NonVolatileVariableBase
,
4014 &mVariableModuleGlobal
->NonVolatileLastVariableOffset
,
4020 if (EFI_ERROR (Status
)) {
4021 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
4028 FlushHobVariableToFlash (NULL
, NULL
);
4030 Status
= EFI_SUCCESS
;
4031 ZeroMem (&mAuthContextOut
, sizeof (mAuthContextOut
));
4032 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
4034 // Authenticated variable initialize.
4036 mAuthContextIn
.StructSize
= sizeof (AUTH_VAR_LIB_CONTEXT_IN
);
4037 mAuthContextIn
.MaxAuthVariableSize
= mVariableModuleGlobal
->MaxAuthVariableSize
- GetVariableHeaderSize ();
4038 Status
= AuthVariableLibInitialize (&mAuthContextIn
, &mAuthContextOut
);
4039 if (!EFI_ERROR (Status
)) {
4040 DEBUG ((EFI_D_INFO
, "Variable driver will work with auth variable support!\n"));
4041 mVariableModuleGlobal
->VariableGlobal
.AuthSupport
= TRUE
;
4042 if (mAuthContextOut
.AuthVarEntry
!= NULL
) {
4043 for (Index
= 0; Index
< mAuthContextOut
.AuthVarEntryCount
; Index
++) {
4044 VariableEntry
= &mAuthContextOut
.AuthVarEntry
[Index
];
4045 Status
= VarCheckLibVariablePropertySet (
4046 VariableEntry
->Name
,
4047 VariableEntry
->Guid
,
4048 &VariableEntry
->VariableProperty
4050 ASSERT_EFI_ERROR (Status
);
4053 } else if (Status
== EFI_UNSUPPORTED
) {
4054 DEBUG ((EFI_D_INFO
, "NOTICE - AuthVariableLibInitialize() returns %r!\n", Status
));
4055 DEBUG ((EFI_D_INFO
, "Variable driver will continue to work without auth variable support!\n"));
4056 mVariableModuleGlobal
->VariableGlobal
.AuthSupport
= FALSE
;
4057 Status
= EFI_SUCCESS
;
4061 if (!EFI_ERROR (Status
)) {
4062 for (Index
= 0; Index
< ARRAY_SIZE (mVariableEntryProperty
); Index
++) {
4063 VariableEntry
= &mVariableEntryProperty
[Index
];
4064 Status
= VarCheckLibVariablePropertySet (VariableEntry
->Name
, VariableEntry
->Guid
, &VariableEntry
->VariableProperty
);
4065 ASSERT_EFI_ERROR (Status
);
4069 ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
);
4072 // Initialize MOR Lock variable.
4080 Convert normal variable storage to the allocated auth variable storage.
4082 @param[in] NormalVarStorage Pointer to the normal variable storage header
4084 @retval the allocated auth variable storage
4087 ConvertNormalVarStorageToAuthVarStorage (
4088 VARIABLE_STORE_HEADER
*NormalVarStorage
4091 VARIABLE_HEADER
*StartPtr
;
4093 VARIABLE_HEADER
*EndPtr
;
4094 UINTN AuthVarStroageSize
;
4095 AUTHENTICATED_VARIABLE_HEADER
*AuthStartPtr
;
4096 VARIABLE_STORE_HEADER
*AuthVarStorage
;
4098 AuthVarStroageSize
= sizeof (VARIABLE_STORE_HEADER
);
4100 // Set AuthFormat as FALSE for normal variable storage
4102 mVariableModuleGlobal
->VariableGlobal
.AuthFormat
= FALSE
;
4105 // Calculate Auth Variable Storage Size
4107 StartPtr
= GetStartPointer (NormalVarStorage
);
4108 EndPtr
= GetEndPointer (NormalVarStorage
);
4109 while (StartPtr
< EndPtr
) {
4110 if (StartPtr
->State
== VAR_ADDED
) {
4111 AuthVarStroageSize
= HEADER_ALIGN (AuthVarStroageSize
);
4112 AuthVarStroageSize
+= sizeof (AUTHENTICATED_VARIABLE_HEADER
);
4113 AuthVarStroageSize
+= StartPtr
->NameSize
+ GET_PAD_SIZE (StartPtr
->NameSize
);
4114 AuthVarStroageSize
+= StartPtr
->DataSize
+ GET_PAD_SIZE (StartPtr
->DataSize
);
4116 StartPtr
= GetNextVariablePtr (StartPtr
);
4120 // Allocate Runtime memory for Auth Variable Storage
4122 AuthVarStorage
= AllocateRuntimeZeroPool (AuthVarStroageSize
);
4123 ASSERT (AuthVarStorage
!= NULL
);
4124 if (AuthVarStorage
== NULL
) {
4129 // Copy Variable from Normal storage to Auth storage
4131 StartPtr
= GetStartPointer (NormalVarStorage
);
4132 EndPtr
= GetEndPointer (NormalVarStorage
);
4133 AuthStartPtr
= (AUTHENTICATED_VARIABLE_HEADER
*) GetStartPointer (AuthVarStorage
);
4134 while (StartPtr
< EndPtr
) {
4135 if (StartPtr
->State
== VAR_ADDED
) {
4136 AuthStartPtr
= (AUTHENTICATED_VARIABLE_HEADER
*) HEADER_ALIGN (AuthStartPtr
);
4138 // Copy Variable Header
4140 AuthStartPtr
->StartId
= StartPtr
->StartId
;
4141 AuthStartPtr
->State
= StartPtr
->State
;
4142 AuthStartPtr
->Attributes
= StartPtr
->Attributes
;
4143 AuthStartPtr
->NameSize
= StartPtr
->NameSize
;
4144 AuthStartPtr
->DataSize
= StartPtr
->DataSize
;
4145 CopyGuid (&AuthStartPtr
->VendorGuid
, &StartPtr
->VendorGuid
);
4147 // Copy Variable Name
4149 NextPtr
= (UINT8
*) (AuthStartPtr
+ 1);
4150 CopyMem (NextPtr
, GetVariableNamePtr (StartPtr
), AuthStartPtr
->NameSize
);
4152 // Copy Variable Data
4154 NextPtr
= NextPtr
+ AuthStartPtr
->NameSize
+ GET_PAD_SIZE (AuthStartPtr
->NameSize
);
4155 CopyMem (NextPtr
, GetVariableDataPtr (StartPtr
), AuthStartPtr
->DataSize
);
4157 // Go to next variable
4159 AuthStartPtr
= (AUTHENTICATED_VARIABLE_HEADER
*) (NextPtr
+ AuthStartPtr
->DataSize
+ GET_PAD_SIZE (AuthStartPtr
->DataSize
));
4161 StartPtr
= GetNextVariablePtr (StartPtr
);
4164 // Update Auth Storage Header
4166 AuthVarStorage
->Format
= NormalVarStorage
->Format
;
4167 AuthVarStorage
->State
= NormalVarStorage
->State
;
4168 AuthVarStorage
->Size
= (UINT32
)((UINTN
)AuthStartPtr
- (UINTN
)AuthVarStorage
);
4169 CopyGuid (&AuthVarStorage
->Signature
, &gEfiAuthenticatedVariableGuid
);
4170 ASSERT (AuthVarStorage
->Size
<= AuthVarStroageSize
);
4173 // Restore AuthFormat
4175 mVariableModuleGlobal
->VariableGlobal
.AuthFormat
= TRUE
;
4176 return AuthVarStorage
;
4180 Get HOB variable store.
4182 @param[in] VariableGuid NV variable store signature.
4184 @retval EFI_SUCCESS Function successfully executed.
4185 @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
4189 GetHobVariableStore (
4190 IN EFI_GUID
*VariableGuid
4193 VARIABLE_STORE_HEADER
*VariableStoreHeader
;
4194 UINT64 VariableStoreLength
;
4195 EFI_HOB_GUID_TYPE
*GuidHob
;
4196 BOOLEAN NeedConvertNormalToAuth
;
4199 // Make sure there is no more than one Variable HOB.
4202 GuidHob
= GetFirstGuidHob (&gEfiAuthenticatedVariableGuid
);
4203 if (GuidHob
!= NULL
) {
4204 if ((GetNextGuidHob (&gEfiAuthenticatedVariableGuid
, GET_NEXT_HOB (GuidHob
)) != NULL
)) {
4205 DEBUG ((DEBUG_ERROR
, "ERROR: Found two Auth Variable HOBs\n"));
4207 } else if (GetFirstGuidHob (&gEfiVariableGuid
) != NULL
) {
4208 DEBUG ((DEBUG_ERROR
, "ERROR: Found one Auth + one Normal Variable HOBs\n"));
4212 GuidHob
= GetFirstGuidHob (&gEfiVariableGuid
);
4213 if (GuidHob
!= NULL
) {
4214 if ((GetNextGuidHob (&gEfiVariableGuid
, GET_NEXT_HOB (GuidHob
)) != NULL
)) {
4215 DEBUG ((DEBUG_ERROR
, "ERROR: Found two Normal Variable HOBs\n"));
4223 // Combinations supported:
4224 // 1. Normal NV variable store +
4225 // Normal HOB variable store
4226 // 2. Auth NV variable store +
4227 // Auth HOB variable store
4228 // 3. Auth NV variable store +
4229 // Normal HOB variable store (code will convert it to Auth Format)
4231 NeedConvertNormalToAuth
= FALSE
;
4232 GuidHob
= GetFirstGuidHob (VariableGuid
);
4233 if (GuidHob
== NULL
&& VariableGuid
== &gEfiAuthenticatedVariableGuid
) {
4235 // Try getting it from normal variable HOB
4237 GuidHob
= GetFirstGuidHob (&gEfiVariableGuid
);
4238 NeedConvertNormalToAuth
= TRUE
;
4240 if (GuidHob
!= NULL
) {
4241 VariableStoreHeader
= GET_GUID_HOB_DATA (GuidHob
);
4242 VariableStoreLength
= GuidHob
->Header
.HobLength
- sizeof (EFI_HOB_GUID_TYPE
);
4243 if (GetVariableStoreStatus (VariableStoreHeader
) == EfiValid
) {
4244 if (!NeedConvertNormalToAuth
) {
4245 mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) AllocateRuntimeCopyPool ((UINTN
) VariableStoreLength
, (VOID
*) VariableStoreHeader
);
4247 mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) ConvertNormalVarStorageToAuthVarStorage ((VOID
*) VariableStoreHeader
);
4249 if (mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
== 0) {
4250 return EFI_OUT_OF_RESOURCES
;
4253 DEBUG ((EFI_D_ERROR
, "HOB Variable Store header is corrupted!\n"));
4261 Initializes variable store area for non-volatile and volatile variable.
4263 @retval EFI_SUCCESS Function successfully executed.
4264 @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
4268 VariableCommonInitialize (
4273 VARIABLE_STORE_HEADER
*VolatileVariableStore
;
4275 EFI_GUID
*VariableGuid
;
4276 EFI_FIRMWARE_VOLUME_HEADER
*NvFvHeader
;
4279 // Allocate runtime memory for variable driver global structure.
4281 mVariableModuleGlobal
= AllocateRuntimeZeroPool (sizeof (VARIABLE_MODULE_GLOBAL
));
4282 if (mVariableModuleGlobal
== NULL
) {
4283 return EFI_OUT_OF_RESOURCES
;
4286 InitializeLock (&mVariableModuleGlobal
->VariableGlobal
.VariableServicesLock
, TPL_NOTIFY
);
4289 // Init non-volatile variable store.
4292 Status
= InitNonVolatileVariableStore (&NvFvHeader
);
4293 if (EFI_ERROR (Status
)) {
4294 FreePool (mVariableModuleGlobal
);
4299 // mVariableModuleGlobal->VariableGlobal.AuthFormat
4300 // has been initialized in InitNonVolatileVariableStore().
4302 if (mVariableModuleGlobal
->VariableGlobal
.AuthFormat
) {
4303 DEBUG ((EFI_D_INFO
, "Variable driver will work with auth variable format!\n"));
4305 // Set AuthSupport to FALSE first, VariableWriteServiceInitialize() will initialize it.
4307 mVariableModuleGlobal
->VariableGlobal
.AuthSupport
= FALSE
;
4308 VariableGuid
= &gEfiAuthenticatedVariableGuid
;
4310 DEBUG ((EFI_D_INFO
, "Variable driver will work without auth variable support!\n"));
4311 mVariableModuleGlobal
->VariableGlobal
.AuthSupport
= FALSE
;
4312 VariableGuid
= &gEfiVariableGuid
;
4316 // Get HOB variable store.
4318 Status
= GetHobVariableStore (VariableGuid
);
4319 if (EFI_ERROR (Status
)) {
4320 FreePool (NvFvHeader
);
4321 FreePool (mVariableModuleGlobal
);
4325 mVariableModuleGlobal
->MaxVolatileVariableSize
= ((PcdGet32 (PcdMaxVolatileVariableSize
) != 0) ?
4326 PcdGet32 (PcdMaxVolatileVariableSize
) :
4327 mVariableModuleGlobal
->MaxVariableSize
4330 // Allocate memory for volatile variable store, note that there is a scratch space to store scratch data.
4332 ScratchSize
= GetMaxVariableSize ();
4333 mVariableModuleGlobal
->ScratchBufferSize
= ScratchSize
;
4334 VolatileVariableStore
= AllocateRuntimePool (PcdGet32 (PcdVariableStoreSize
) + ScratchSize
);
4335 if (VolatileVariableStore
== NULL
) {
4336 if (mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
!= 0) {
4337 FreePool ((VOID
*) (UINTN
) mVariableModuleGlobal
->VariableGlobal
.HobVariableBase
);
4339 FreePool (NvFvHeader
);
4340 FreePool (mVariableModuleGlobal
);
4341 return EFI_OUT_OF_RESOURCES
;
4344 SetMem (VolatileVariableStore
, PcdGet32 (PcdVariableStoreSize
) + ScratchSize
, 0xff);
4347 // Initialize Variable Specific Data.
4349 mVariableModuleGlobal
->VariableGlobal
.VolatileVariableBase
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) VolatileVariableStore
;
4350 mVariableModuleGlobal
->VolatileLastVariableOffset
= (UINTN
) GetStartPointer (VolatileVariableStore
) - (UINTN
) VolatileVariableStore
;
4352 CopyGuid (&VolatileVariableStore
->Signature
, VariableGuid
);
4353 VolatileVariableStore
->Size
= PcdGet32 (PcdVariableStoreSize
);
4354 VolatileVariableStore
->Format
= VARIABLE_STORE_FORMATTED
;
4355 VolatileVariableStore
->State
= VARIABLE_STORE_HEALTHY
;
4356 VolatileVariableStore
->Reserved
= 0;
4357 VolatileVariableStore
->Reserved1
= 0;
4364 Get the proper fvb handle and/or fvb protocol by the given Flash address.
4366 @param[in] Address The Flash address.
4367 @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.
4368 @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.
4372 GetFvbInfoByAddress (
4373 IN EFI_PHYSICAL_ADDRESS Address
,
4374 OUT EFI_HANDLE
*FvbHandle OPTIONAL
,
4375 OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL
**FvbProtocol OPTIONAL
4379 EFI_HANDLE
*HandleBuffer
;
4382 EFI_PHYSICAL_ADDRESS FvbBaseAddress
;
4383 EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL
*Fvb
;
4384 EFI_FVB_ATTRIBUTES_2 Attributes
;
4386 UINTN NumberOfBlocks
;
4388 HandleBuffer
= NULL
;
4390 // Get all FVB handles.
4392 Status
= GetFvbCountAndBuffer (&HandleCount
, &HandleBuffer
);
4393 if (EFI_ERROR (Status
)) {
4394 return EFI_NOT_FOUND
;
4398 // Get the FVB to access variable store.
4401 for (Index
= 0; Index
< HandleCount
; Index
+= 1, Status
= EFI_NOT_FOUND
, Fvb
= NULL
) {
4402 Status
= GetFvbByHandle (HandleBuffer
[Index
], &Fvb
);
4403 if (EFI_ERROR (Status
)) {
4404 Status
= EFI_NOT_FOUND
;
4409 // Ensure this FVB protocol supported Write operation.
4411 Status
= Fvb
->GetAttributes (Fvb
, &Attributes
);
4412 if (EFI_ERROR (Status
) || ((Attributes
& EFI_FVB2_WRITE_STATUS
) == 0)) {
4417 // Compare the address and select the right one.
4419 Status
= Fvb
->GetPhysicalAddress (Fvb
, &FvbBaseAddress
);
4420 if (EFI_ERROR (Status
)) {
4425 // Assume one FVB has one type of BlockSize.
4427 Status
= Fvb
->GetBlockSize (Fvb
, 0, &BlockSize
, &NumberOfBlocks
);
4428 if (EFI_ERROR (Status
)) {
4432 if ((Address
>= FvbBaseAddress
) && (Address
< (FvbBaseAddress
+ BlockSize
* NumberOfBlocks
))) {
4433 if (FvbHandle
!= NULL
) {
4434 *FvbHandle
= HandleBuffer
[Index
];
4436 if (FvbProtocol
!= NULL
) {
4439 Status
= EFI_SUCCESS
;
4443 FreePool (HandleBuffer
);
4446 Status
= EFI_NOT_FOUND
;