/*++

Copyright (c) 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  Variable.h
   
Abstract:

  Tiano PEIM to provide the variable functionality

--*/

#ifndef _PEI_VARIABLE_H
#define _PEI_VARIABLE_H

//
// BugBug: We need relcate the head file.
// 
#include <Common/Variable.h>
#include <VarMachine.h>

//
// Define GET_PAD_SIZE to optimize compiler
//
#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))
#define GET_PAD_SIZE(a) (0)
#else
#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))
#endif

#define GET_VARIABLE_NAME_PTR(a)  (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))

#define GET_VARIABLE_DATA_PTR(a) \
  (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (a) + (a)->NameSize + GET_PAD_SIZE ((a)->NameSize))

typedef struct {
  VARIABLE_HEADER *CurrPtr;
  VARIABLE_HEADER *EndPtr;
  VARIABLE_HEADER *StartPtr;
} VARIABLE_POINTER_TRACK;

#define VARIABLE_INDEX_TABLE_VOLUME 122

#define EFI_VARIABLE_INDEX_TABLE_GUID \
  { 0x8cfdb8c8, 0xd6b2, 0x40f3, { 0x8e, 0x97, 0x02, 0x30, 0x7c, 0xc9, 0x8b, 0x7c } }

typedef struct {
  UINT16          Length;
  UINT16          GoneThrough;
  VARIABLE_HEADER *EndPtr;
  VARIABLE_HEADER *StartPtr;
  UINT16          Index[VARIABLE_INDEX_TABLE_VOLUME];
} VARIABLE_INDEX_TABLE;

extern EFI_GUID gEfiVariableIndexTableGuid;

//
// Functions
//
EFI_STATUS
EFIAPI
PeimInitializeVariableServices (
  IN EFI_FFS_FILE_HEADER       *FfsHeader,
  IN EFI_PEI_SERVICES          **PeiServices
  )
/*++

Routine Description:

  TODO: Add function description

Arguments:

  FfsHeader   - TODO: add argument description
  PeiServices - TODO: add argument description

Returns:

  TODO: add return values

--*/
;

EFI_STATUS
EFIAPI
PeiGetVariable (
  IN EFI_PEI_SERVICES             **PeiServices,
  IN CHAR16                       *VariableName,
  IN EFI_GUID                     * VendorGuid,
  OUT UINT32                      *Attributes OPTIONAL,
  IN OUT UINTN                    *DataSize,
  OUT VOID                        *Data
  )
/*++

Routine Description:

  TODO: Add function description

Arguments:

  PeiServices   - TODO: add argument description
  VariableName  - TODO: add argument description
  VendorGuid    - TODO: add argument description
  Attributes    - TODO: add argument description
  DataSize      - TODO: add argument description
  Data          - TODO: add argument description

Returns:

  TODO: add return values

--*/
;

EFI_STATUS
EFIAPI
PeiGetNextVariableName (
  IN EFI_PEI_SERVICES             **PeiServices,
  IN OUT UINTN                    *VariableNameSize,
  IN OUT CHAR16                   *VariableName,
  IN OUT EFI_GUID                 *VendorGuid
  )
/*++

Routine Description:

  TODO: Add function description

Arguments:

  PeiServices       - TODO: add argument description
  VariableNameSize  - TODO: add argument description
  VariableName      - TODO: add argument description
  VendorGuid        - TODO: add argument description

Returns:

  TODO: add return values

--*/
;

#endif // _PEI_VARIABLE_H
