-/*++\r
+/** @file\r
+\r
+ Implement ReadOnly Variable Services required by PEIM and install\r
+ PI ReadOnly Varaiable2 PPI. These services operates the non volatile storage space.\r
\r
-Copyright (c) 2006 - 2007 Intel Corporation. <BR>\r
+Copyright (c) 2006 - 2008 Intel Corporation. <BR>\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
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
Module Name:\r
\r
- Variable.c\r
-\r
-Abstract:\r
-\r
- Framework PEIM to provide the Variable functionality\r
-\r
---*/\r
+**/\r
\r
\r
#include "Variable.h"\r
\r
}\r
\r
-STATIC\r
VARIABLE_HEADER *\r
-GetNextVariablePtr (\r
- IN VARIABLE_HEADER *Variable\r
+GetStartPointer (\r
+ IN VARIABLE_STORE_HEADER *VarStoreHeader\r
)\r
/*++\r
\r
Routine Description:\r
\r
- This code checks if variable header is valid or not.\r
+ This code gets the pointer to the first variable memory pointer byte\r
\r
Arguments:\r
- Variable Pointer to the Variable Header.\r
+\r
+ VarStoreHeader Pointer to the Variable Store Header.\r
\r
Returns:\r
- TRUE Variable header is valid.\r
- FALSE Variable header is not valid.\r
+\r
+ VARIABLE_HEADER* Pointer to last unavailable Variable Header\r
\r
--*/\r
{\r
- return (VARIABLE_HEADER *) ((UINTN) GET_VARIABLE_DATA_PTR (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r
+ //\r
+ // The end of variable store\r
+ //\r
+ return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r
+}\r
+\r
+VARIABLE_HEADER *\r
+GetEndPointer (\r
+ IN VARIABLE_STORE_HEADER *VarStoreHeader\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the pointer to the last variable memory pointer byte\r
+\r
+Arguments:\r
+\r
+ VarStoreHeader Pointer to the Variable Store Header.\r
+\r
+Returns:\r
+\r
+ VARIABLE_HEADER* Pointer to last unavailable Variable Header\r
+\r
+--*/\r
+{\r
+ //\r
+ // The end of variable store\r
+ //\r
+ return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r
}\r
\r
STATIC\r
\r
--*/\r
{\r
- if (Variable == NULL ||\r
- Variable->StartId != VARIABLE_DATA ||\r
- (sizeof (VARIABLE_HEADER) + Variable->DataSize + Variable->NameSize) > MAX_VARIABLE_SIZE\r
- ) {\r
+ if (Variable == NULL || Variable->StartId != VARIABLE_DATA ) {\r
return FALSE;\r
}\r
\r
return TRUE;\r
}\r
\r
+\r
+UINTN\r
+NameSizeOfVariable (\r
+ IN VARIABLE_HEADER *Variable\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the size of name of variable.\r
+\r
+Arguments:\r
+\r
+ Variable Pointer to the Variable Header.\r
+\r
+Returns:\r
+\r
+ UINTN Size of variable in bytes\r
+\r
+--*/\r
+{\r
+ if (Variable->State == (UINT8) (-1) ||\r
+ Variable->DataSize == (UINT32) -1 ||\r
+ Variable->NameSize == (UINT32) -1 ||\r
+ Variable->Attributes == (UINT32) -1) {\r
+ return 0;\r
+ }\r
+ return (UINTN) Variable->NameSize;\r
+}\r
+\r
+UINTN\r
+DataSizeOfVariable (\r
+ IN VARIABLE_HEADER *Variable\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the size of name of variable.\r
+\r
+Arguments:\r
+\r
+ Variable Pointer to the Variable Header.\r
+\r
+Returns:\r
+\r
+ UINTN Size of variable in bytes\r
+\r
+--*/\r
+{\r
+ if (Variable->State == (UINT8) -1 ||\r
+ Variable->DataSize == (UINT32) -1 ||\r
+ Variable->NameSize == (UINT32) -1 ||\r
+ Variable->Attributes == (UINT32) -1) {\r
+ return 0;\r
+ }\r
+ return (UINTN) Variable->DataSize;\r
+}\r
+\r
+CHAR16 *\r
+GetVariableNamePtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the pointer to the variable name.\r
+\r
+Arguments:\r
+\r
+ Variable Pointer to the Variable Header.\r
+\r
+Returns:\r
+\r
+ CHAR16* Pointer to Variable Name\r
+\r
+--*/\r
+{\r
+\r
+ return (CHAR16 *) (Variable + 1);\r
+}\r
+\r
+\r
+UINT8 *\r
+GetVariableDataPtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the pointer to the variable data.\r
+\r
+Arguments:\r
+\r
+ Variable Pointer to the Variable Header.\r
+\r
+Returns:\r
+\r
+ UINT8* Pointer to Variable Data\r
+\r
+--*/\r
+{\r
+ UINTN Value;\r
+ \r
+ //\r
+ // Be careful about pad size for alignment\r
+ //\r
+ Value = (UINTN) GetVariableNamePtr (Variable);\r
+ Value += NameSizeOfVariable (Variable);\r
+ Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r
+\r
+ return (UINT8 *) Value;\r
+}\r
+\r
+VARIABLE_HEADER *\r
+GetNextVariablePtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+ This code gets the pointer to the next variable header.\r
+\r
+Arguments:\r
+\r
+ Variable Pointer to the Variable Header.\r
+\r
+Returns:\r
+\r
+ VARIABLE_HEADER* Pointer to next variable header.\r
+\r
+--*/\r
+{\r
+ UINTN Value;\r
+\r
+ if (!IsValidVariableHeader (Variable)) {\r
+ return NULL;\r
+ }\r
+\r
+ Value = (UINTN) GetVariableDataPtr (Variable);\r
+ Value += DataSizeOfVariable (Variable);\r
+ Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r
+\r
+ //\r
+ // Be careful about pad size for alignment\r
+ //\r
+ return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r
+}\r
+\r
+\r
STATIC\r
VARIABLE_STORE_STATUS\r
EFIAPI\r
\r
--*/\r
{\r
+ VOID *Point;\r
+\r
if (VariableName[0] == 0) {\r
PtrTrack->CurrPtr = Variable;\r
return EFI_SUCCESS;\r
(((INT32 *) VendorGuid)[2] == ((INT32 *) &Variable->VendorGuid)[2]) &&\r
(((INT32 *) VendorGuid)[3] == ((INT32 *) &Variable->VendorGuid)[3])\r
) {\r
- if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable), Variable->NameSize)) {\r
+ ASSERT (NameSizeOfVariable (Variable) != 0);\r
+ Point = (VOID *) GetVariableNamePtr (Variable);\r
+ if (!CompareMem (VariableName, Point, NameSizeOfVariable (Variable))) {\r
PtrTrack->CurrPtr = Variable;\r
return EFI_SUCCESS;\r
}\r
//\r
// Find the variable by walk through non-volatile variable store\r
//\r
- IndexTable->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader + 1);\r
- IndexTable->EndPtr = (VARIABLE_HEADER *) ((UINTN) VariableStoreHeader + VariableStoreHeader->Size);\r
+ IndexTable->StartPtr = GetStartPointer (VariableStoreHeader);\r
+ IndexTable->EndPtr = GetEndPointer (VariableStoreHeader);\r
\r
//\r
// Start Pointers for the variable.\r
EFI_PEI_SERVICES **PeiServices;\r
\r
PeiServices = GetPeiServicesTablePointer ();\r
- if (VariableName == NULL || VariableGuid == NULL) {\r
+ if (VariableName == NULL || VariableGuid == NULL || DataSize == NULL) {\r
return EFI_INVALID_PARAMETER;\r
}\r
//\r
//\r
// Get data size\r
//\r
- VarDataSize = Variable.CurrPtr->DataSize;\r
+ VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r
if (*DataSize >= VarDataSize) {\r
- (*PeiServices)->CopyMem (Data, GET_VARIABLE_DATA_PTR (Variable.CurrPtr), VarDataSize);\r
+ //\r
+ // PO-TKW: Address one checking in this place\r
+ //\r
+ if (Data == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ (*PeiServices)->CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r
\r
if (Attributes != NULL) {\r
*Attributes = Variable.CurrPtr->Attributes;\r
EFI_PEI_SERVICES **PeiServices;\r
\r
PeiServices = GetPeiServicesTablePointer ();\r
- if (VariableName == NULL) {\r
+ if (VariableName == NULL || VariableGuid == NULL || VariableNameSize == NULL) {\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
while (!(Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL)) {\r
if (IsValidVariableHeader (Variable.CurrPtr)) {\r
if (Variable.CurrPtr->State == VAR_ADDED) {\r
- VarNameSize = (UINTN) Variable.CurrPtr->NameSize;\r
+ ASSERT (NameSizeOfVariable (Variable.CurrPtr) != 0);\r
+\r
+ VarNameSize = (UINTN) NameSizeOfVariable (Variable.CurrPtr);\r
if (VarNameSize <= *VariableNameSize) {\r
- (*PeiServices)->CopyMem (VariableName, GET_VARIABLE_NAME_PTR (Variable.CurrPtr), VarNameSize);\r
+ (*PeiServices)->CopyMem (VariableName, GetVariableNamePtr (Variable.CurrPtr), VarNameSize);\r
\r
(*PeiServices)->CopyMem (VariableGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));\r
\r
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