Help functions used by PCD DXE driver.\r
\r
Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>\r
-Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r
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
CHAR8 *PcdName;\r
CHAR8 *Name;\r
\r
+ //\r
+ // Return NULL when PCD name table is absent. \r
+ //\r
+ if (IsPeiDb) {\r
+ if (mPcdDatabase.PeiDb->PcdNameTableOffset == 0) {\r
+ return NULL;\r
+ }\r
+ } else {\r
+ if (mPcdDatabase.DxeDb->PcdNameTableOffset == 0) {\r
+ return NULL;\r
+ }\r
+ }\r
+\r
//\r
// TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.\r
// We have to decrement TokenNumber by 1 to make it usable\r
EFI_GUID *Guid;\r
UINT16 *Name;\r
UINTN VariableOffset;\r
+ UINT32 Attributes;\r
VOID *InternalData;\r
VARIABLE_HEAD *VariableHead;\r
UINTN Offset;\r
Guid = GuidTable + VariableHead->GuidTableIndex;\r
Name = (UINT16*) (StringTable + VariableHead->StringIndex);\r
VariableOffset = VariableHead->Offset;\r
- Status = SetHiiVariable (Guid, Name, Data, *Size, VariableOffset);\r
-\r
- if (EFI_NOT_FOUND == Status) {\r
- if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {\r
- CopyMem (\r
- StringTable + *(STRING_HEAD *)(PcdDb + VariableHead->DefaultValueOffset),\r
- Data,\r
- *Size\r
- );\r
- } else {\r
- CopyMem (PcdDb + VariableHead->DefaultValueOffset, Data, *Size);\r
- } \r
- Status = EFI_SUCCESS;\r
- }\r
+ Attributes = VariableHead->Attributes;\r
+ Status = SetHiiVariable (Guid, Name, Attributes, Data, *Size, VariableOffset);\r
break;\r
\r
case PCD_TYPE_DATA:\r
\r
@param VariableGuid Guid of variable which stored value of a HII-type PCD.\r
@param VariableName Unicode name of variable which stored value of a HII-type PCD.\r
+ @param SetAttributes Attributes bitmask to set for the variable.\r
@param Data Value want to be set.\r
@param DataSize Size of value\r
@param Offset Value offset of HII-type PCD in variable.\r
SetHiiVariable (\r
IN EFI_GUID *VariableGuid,\r
IN UINT16 *VariableName,\r
+ IN UINT32 SetAttributes,\r
IN CONST VOID *Data,\r
IN UINTN DataSize,\r
IN UINTN Offset\r
//\r
// Patch new PCD's value to offset in given HII variable.\r
//\r
- if (Size >= (DataSize + Offset)) {\r
+ if (Size >= (DataSize + Offset)) {\r
SetSize = Size;\r
} else {\r
SetSize = DataSize + Offset;\r
\r
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);\r
\r
+ if (SetAttributes == 0) {\r
+ SetAttributes = Attribute;\r
+ }\r
+\r
Status = gRT->SetVariable (\r
VariableName,\r
VariableGuid,\r
- Attribute,\r
+ SetAttributes,\r
SetSize,\r
Buffer\r
);\r
ASSERT (Buffer != NULL);\r
\r
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);\r
- \r
+\r
+ if (SetAttributes == 0) {\r
+ SetAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE;\r
+ }\r
+\r
Status = gRT->SetVariable (\r
VariableName,\r
VariableGuid,\r
- EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r
+ SetAttributes,\r
Size,\r
Buffer\r
);\r
}\r
\r
//\r
- // If we drop to here, the value is failed to be written in to variable area\r
- // So, we will save the data in the PCD Database's volatile area.\r
+ // If we drop to here, the value is failed to be written in to variable area.\r
//\r
return Status;\r
}\r
}\r
}\r
}\r
+\r
+/**\r
+ VariableLock DynamicHiiPcd.\r
+\r
+ @param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,\r
+ If FALSE, the pcd entry is initialized in DXE phase.\r
+ @param[in] VariableLock Pointer to VariableLockProtocol.\r
+\r
+**/\r
+VOID\r
+VariableLockDynamicHiiPcd (\r
+ IN BOOLEAN IsPeiDb,\r
+ IN EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ PCD_DATABASE_INIT *Database;\r
+ UINT32 LocalTokenCount; \r
+ UINTN TokenNumber;\r
+ UINT32 LocalTokenNumber;\r
+ UINTN Offset;\r
+ EFI_GUID *GuidTable;\r
+ UINT8 *StringTable;\r
+ VARIABLE_HEAD *VariableHead;\r
+ EFI_GUID *Guid;\r
+ UINT16 *Name;\r
+\r
+ Database = IsPeiDb ? mPcdDatabase.PeiDb: mPcdDatabase.DxeDb;\r
+ LocalTokenCount = IsPeiDb ? mPeiLocalTokenCount: mDxeLocalTokenCount;\r
+\r
+ //\r
+ // Go through PCD database to find out DynamicHii PCDs.\r
+ //\r
+ for (TokenNumber = 0; TokenNumber < LocalTokenCount; TokenNumber++) {\r
+ if (IsPeiDb) {\r
+ LocalTokenNumber = GetLocalTokenNumber (TRUE, TokenNumber);\r
+ } else {\r
+ LocalTokenNumber = GetLocalTokenNumber (FALSE, TokenNumber + mPeiLocalTokenCount);\r
+ }\r
+ if ((LocalTokenNumber & PCD_TYPE_HII) != 0) {\r
+ Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;\r
+ VariableHead = (VARIABLE_HEAD *) ((UINT8 *) Database + Offset);\r
+ //\r
+ // Why not to set property by VarCheckProtocol with Attributes and Property directly here?\r
+ // It is because that set property by VarCheckProtocol will indicate the variable to\r
+ // be a system variable, but the unknown max size of the variable is dangerous to\r
+ // the system variable region.\r
+ //\r
+ if ((VariableHead->Property & VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY) != 0) {\r
+ //\r
+ // DynamicHii PCD with RO property set in *.dsc.\r
+ //\r
+ StringTable = (UINT8 *) ((UINT8 *) Database + Database->StringTableOffset);\r
+ GuidTable = (EFI_GUID *) ((UINT8 *) Database + Database->GuidTableOffset);\r
+ Guid = GuidTable + VariableHead->GuidTableIndex;\r
+ Name = (UINT16*) (StringTable + VariableHead->StringIndex);\r
+ Status = VariableLock->RequestToLock (VariableLock, Name, Guid);\r
+ ASSERT_EFI_ERROR (Status);\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+/**\r
+ VariableLockProtocol callback\r
+ to lock the variables referenced by DynamicHii PCDs with RO property set in *.dsc.\r
+\r
+ @param[in] Event Event whose notification function is being invoked.\r
+ @param[in] Context Pointer to the notification function's context.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+VariableLockCallBack (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *Context\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock;\r
+\r
+ Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **) &VariableLock);\r
+ if (!EFI_ERROR (Status)) {\r
+ VariableLockDynamicHiiPcd (TRUE, VariableLock);\r
+ VariableLockDynamicHiiPcd (FALSE, VariableLock);\r
+ }\r
+}\r
+\r
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