Align the header of variable from 1 to 4, which can avoid the size of variable conten...

[mirror_edk2.git] / IntelFrameworkModulePkg / Universal / VariablePei / Variable.h

/*++\r
\r
Copyright (c) 2006 - 2007, 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
\r
Module Name:\r
\r
  Variable.h\r
\r
Abstract:\r
\r
  Tiano PEIM to provide the variable functionality\r
\r
--*/\r
\r
#ifndef _PEI_VARIABLE_H\r
#define _PEI_VARIABLE_H\r
\r
#include <PiPei.h>\r
#include <Ppi/ReadOnlyVariable.h>\r
#include <Ppi/ReadOnlyVariable2.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PeimEntryPoint.h>\r
#include <Library/HobLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/PeiServicesTablePointerLib.h>\r
#include <VariableFormat.h>\r
\r
//\r
// Define GET_PAD_SIZE to optimize compiler\r
//\r
#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))\r
#define GET_PAD_SIZE(a) (0)\r
#else\r
#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))\r
#endif\r
\r
#define HEADER_ALIGN(Header)  (((UINTN) (Header) + HEADER_ALIGNMENT - 1) & (~(HEADER_ALIGNMENT - 1)))\r
\r
#define GET_VARIABLE_NAME_PTR(a)  (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))\r
\r
#define GET_VARIABLE_DATA_PTR(a) \\r
  (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (a) + NameSizeOfVariable(a) + GET_PAD_SIZE (NameSizeOfVariable(a) ))\r
\r
typedef struct {\r
  VARIABLE_HEADER *CurrPtr;\r
  VARIABLE_HEADER *EndPtr;\r
  VARIABLE_HEADER *StartPtr;\r
} VARIABLE_POINTER_TRACK;\r
\r
#define VARIABLE_INDEX_TABLE_VOLUME 122\r
\r
#define EFI_VARIABLE_INDEX_TABLE_GUID \\r
  { 0x8cfdb8c8, 0xd6b2, 0x40f3, { 0x8e, 0x97, 0x02, 0x30, 0x7c, 0xc9, 0x8b, 0x7c } }\r
\r
typedef struct {\r
  UINT16          Length;\r
  UINT16          GoneThrough;\r
  VARIABLE_HEADER *EndPtr;\r
  VARIABLE_HEADER *StartPtr;\r
  UINT16          Index[VARIABLE_INDEX_TABLE_VOLUME];\r
} VARIABLE_INDEX_TABLE;\r
\r
\r
//\r
// Functions\r
//\r
EFI_STATUS\r
EFIAPI\r
PeimInitializeVariableServices (\r
  IN EFI_FFS_FILE_HEADER       *FfsHeader,\r
  IN EFI_PEI_SERVICES          **PeiServices\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  TODO: Add function description\r
\r
Arguments:\r
\r
  FfsHeader   - TODO: add argument description\r
  PeiServices - TODO: add argument description\r
\r
Returns:\r
\r
  TODO: add return values\r
\r
--*/\r
;\r
\r
EFI_STATUS\r
EFIAPI\r
PeiGetVariable (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN CHAR16                       *VariableName,\r
  IN EFI_GUID                     * VendorGuid,\r
  OUT UINT32                      *Attributes OPTIONAL,\r
  IN OUT UINTN                    *DataSize,\r
  OUT VOID                        *Data\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  TODO: Add function description\r
\r
Arguments:\r
\r
  PeiServices   - TODO: add argument description\r
  VariableName  - TODO: add argument description\r
  VendorGuid    - TODO: add argument description\r
  Attributes    - TODO: add argument description\r
  DataSize      - TODO: add argument description\r
  Data          - TODO: add argument description\r
\r
Returns:\r
\r
  TODO: add return values\r
\r
--*/\r
;\r
\r
EFI_STATUS\r
EFIAPI\r
PeiGetVariable2 (\r
  IN CONST  EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r
  IN CONST  CHAR16                          *VariableName,\r
  IN CONST  EFI_GUID                        *VariableGuid,\r
  OUT       UINT32                          *Attributes,\r
  IN OUT    UINTN                           *DataSize,\r
  OUT       VOID                            *Data\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Provide the read variable functionality of the variable services.\r
\r
Arguments:\r
\r
  PeiServices - General purpose services available to every PEIM.\r
\r
  VariableName     - The variable name\r
\r
  VendorGuid       - The vendor's GUID\r
\r
  Attributes       - Pointer to the attribute\r
\r
  DataSize         - Size of data\r
\r
  Data             - Pointer to data\r
\r
Returns:\r
\r
  EFI_SUCCESS           - The interface could be successfully installed\r
\r
  EFI_NOT_FOUND         - The variable could not be discovered\r
\r
  EFI_BUFFER_TOO_SMALL  - The caller buffer is not large enough\r
\r
--*/\r
;  \r
  \r
EFI_STATUS\r
EFIAPI\r
PeiGetNextVariableName2 (\r
  IN CONST  EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r
  IN OUT UINTN                              *VariableNameSize,\r
  IN OUT CHAR16                             *VariableName,\r
  IN OUT EFI_GUID                           *VariableGuid\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Provide the get next variable functionality of the variable services.\r
\r
Arguments:\r
\r
  PeiServices        - General purpose services available to every PEIM.\r
  VariabvleNameSize  - The variable name's size.\r
  VariableName       - A pointer to the variable's name.\r
  VariableGuid       - A pointer to the EFI_GUID structure.\r
\r
  VariableNameSize - Size of the variable name\r
\r
  VariableName     - The variable name\r
\r
  VendorGuid       - The vendor's GUID\r
\r
Returns:\r
\r
  EFI_SUCCESS - The interface could be successfully installed\r
\r
  EFI_NOT_FOUND - The variable could not be discovered\r
\r
--*/\r
;\r
  \r
EFI_STATUS\r
EFIAPI\r
PeiGetNextVariableName (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN OUT UINTN                    *VariableNameSize,\r
  IN OUT CHAR16                   *VariableName,\r
  IN OUT EFI_GUID                 *VendorGuid\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  TODO: Add function description\r
\r
Arguments:\r
\r
  PeiServices       - TODO: add argument description\r
  VariableNameSize  - TODO: add argument description\r
  VariableName      - TODO: add argument description\r
  VendorGuid        - TODO: add argument description\r
\r
Returns:\r
\r
  TODO: add return values\r
\r
--*/\r
;\r
\r
/**\r
  Get one variable by the index count.\r
\r
  @param  IndexTable  The pointer to variable index table.\r
  @param  Count       The index count of variable in index table.\r
\r
  @return The pointer to variable header indexed by count.\r
\r
**/\r
VARIABLE_HEADER *\r
GetVariableByIndex (\r
  IN VARIABLE_INDEX_TABLE        *IndexTable,\r
  IN UINT32                      Count\r
  );\r
\r
/**\r
  Record Variable in VariableIndex HOB.\r
\r
  Record Variable in VariableIndex HOB and update the length of variable index table.\r
\r
  @param  IndexTable  The pointer to variable index table.\r
  @param  Variable    The pointer to the variable that will be recorded.\r
\r
  @retval VOID\r
\r
**/\r
VOID\r
VariableIndexTableUpdate (\r
  IN OUT  VARIABLE_INDEX_TABLE   *IndexTable,\r
  IN      VARIABLE_HEADER        *Variable\r
  );\r
\r
#endif // _PEI_VARIABLE_H\r