/** @file\r
- EFI Runtime Variable services.\r
+\r
+ Implement all four UEFI Runtime Variable services for the nonvolatile\r
+ and volatile storage space and install variable architecture protocol.\r
\r
- Copyright (c) 2006 - 2008, Intel Corporation \r
- All rights reserved. This program and the accompanying materials \r
- are licensed and made available under the terms and conditions of the BSD License \r
- which accompanies this distribution. The full text of the license may be found at \r
- http://opensource.org/licenses/bsd-license.php \r
+Copyright (c) 2006 - 2008, Intel Corporation \r
+All rights reserved. This program and the accompanying materials \r
+are licensed and made available under the terms and conditions of the BSD License \r
+which accompanies this distribution. The full text of the license may be found at \r
+http://opensource.org/licenses/bsd-license.php \r
\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
\r
**/\r
\r
EFI_EVENT mVirtualAddressChangeEvent = NULL;\r
EFI_HANDLE mHandle = NULL;\r
\r
+//\r
+// The current Hii implementation accesses this variable a larg # of times on every boot.\r
+// Other common variables are only accessed a single time. This is why this cache algorithm\r
+// only targets a single variable. Probably to get an performance improvement out of\r
+// a Cache you would need a cache that improves the search performance for a variable.\r
+//\r
+VARIABLE_CACHE_ENTRY mVariableCache[] = {\r
+ {\r
+ &gEfiGlobalVariableGuid,\r
+ L"Lang",\r
+ 0x00000000,\r
+ 0x00,\r
+ NULL\r
+ }\r
+};\r
+\r
+GLOBAL_REMOVE_IF_UNREFERENCED VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r
+\r
+\r
\r
//\r
// This is a temperary function which will be removed\r
}\r
\r
\r
-GLOBAL_REMOVE_IF_UNREFERENCED VARIABLE_INFO_ENTRY *gVariableInfo = NULL;\r
-\r
-\r
/**\r
Routine used to track statistical information about variable usage. \r
The data is stored in the EFI system table so it can be accessed later.\r
UINT8 *ValidBuffer;\r
UINTN MaximumBufferSize;\r
UINTN VariableSize;\r
+ UINTN VariableNameSize;\r
+ UINTN UpdatingVariableNameSize;\r
UINTN NameSize;\r
UINT8 *CurrPtr;\r
VOID *Point0;\r
VOID *Point1;\r
BOOLEAN FoundAdded;\r
EFI_STATUS Status;\r
+ CHAR16 *VariableNamePtr;\r
+ CHAR16 *UpdatingVariableNamePtr;\r
\r
VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);\r
\r
//\r
\r
//\r
- // Reinstall all ADDED variables\r
+ // Reinstall all ADDED variables as long as they are not identical to Updating Variable\r
// \r
Variable = GetStartPointer (VariableStoreHeader);\r
while (IsValidVariableHeader (Variable)) {\r
NextVariable = GetNextVariablePtr (Variable);\r
if (Variable->State == VAR_ADDED) {\r
+ if (UpdatingVariable != NULL) {\r
+ if (UpdatingVariable == Variable) {\r
+ Variable = NextVariable;\r
+ continue;\r
+ }\r
+\r
+ VariableNameSize = NameSizeOfVariable(Variable);\r
+ UpdatingVariableNameSize = NameSizeOfVariable(UpdatingVariable);\r
+\r
+ VariableNamePtr = GetVariableNamePtr (Variable);\r
+ UpdatingVariableNamePtr = GetVariableNamePtr (UpdatingVariable);\r
+ if (CompareGuid (&Variable->VendorGuid, &UpdatingVariable->VendorGuid) &&\r
+ VariableNameSize == UpdatingVariableNameSize &&\r
+ CompareMem (VariableNamePtr, UpdatingVariableNamePtr, VariableNameSize) == 0 ) {\r
+ Variable = NextVariable;\r
+ continue;\r
+ }\r
+ }\r
VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r
CurrPtr += VariableSize;\r
}\r
-\r
Variable = NextVariable;\r
}\r
+\r
+ //\r
+ // Reinstall the variable being updated if it is not NULL\r
+ //\r
+ if (UpdatingVariable != NULL) {\r
+ VariableSize = (UINTN)(GetNextVariablePtr (UpdatingVariable)) - (UINTN)UpdatingVariable;\r
+ CopyMem (CurrPtr, (UINT8 *) UpdatingVariable, VariableSize);\r
+ CurrPtr += VariableSize;\r
+ }\r
+\r
//\r
// Reinstall all in delete transition variables\r
// \r
Variable = GetStartPointer (VariableStoreHeader);\r
while (IsValidVariableHeader (Variable)) {\r
NextVariable = GetNextVariablePtr (Variable);\r
- if (Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
+ if (Variable != UpdatingVariable && Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {\r
\r
//\r
// Buffer has cached all ADDED variable. \r
) {\r
Point0 = (VOID *) GetVariableNamePtr (AddedVariable);\r
Point1 = (VOID *) GetVariableNamePtr (Variable);\r
- if (!CompareMem (\r
- Point0,\r
- Point1,\r
- NameSizeOfVariable (AddedVariable)\r
- )\r
- ) {\r
+ if (CompareMem (Point0, Point1, NameSizeOfVariable (AddedVariable)) == 0) {\r
FoundAdded = TRUE;\r
break;\r
}\r
AddedVariable = NextAddedVariable;\r
}\r
if (!FoundAdded) {\r
+ //\r
+ // Promote VAR_IN_DELETED_TRANSITION to VAR_ADDED\r
+ //\r
VariableSize = (UINTN) NextVariable - (UINTN) Variable;\r
CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);\r
- if (Variable != UpdatingVariable) {\r
- ((VARIABLE_HEADER *) CurrPtr)->State = VAR_ADDED;\r
- }\r
+ ((VARIABLE_HEADER *) CurrPtr)->State = VAR_ADDED;\r
CurrPtr += VariableSize;\r
}\r
}\r
}\r
\r
\r
-//\r
-// The current Hii implementation accesses this variable a larg # of times on every boot.\r
-// Other common variables are only accessed a single time. This is why this cache algorithm\r
-// only targets a single variable. Probably to get an performance improvement out of\r
-// a Cache you would need a cache that improves the search performance for a variable.\r
-//\r
-VARIABLE_CACHE_ENTRY mVariableCache[] = {\r
- {\r
- &gEfiGlobalVariableGuid,\r
- L"Lang",\r
- 0x00000000,\r
- 0x00,\r
- NULL\r
- }\r
-};\r
-\r
-\r
/**\r
Update the Cache with Variable information. These are the same \r
arguments as the EFI Variable services.\r
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