source: vbox/trunk/src/VBox/Devices/EFI/Firmware/OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.h@ 52386

/*++

Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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:

  FwBlockService.h
  
Abstract:

  Firmware volume block driver for Intel Firmware Hub (FWH) device

--*/

#ifndef _FW_BLOCK_SERVICE_H
#define _FW_BLOCK_SERVICE_H

//
// Fvb Protocol instance data
//
#define FVB_DEVICE_FROM_THIS(a)         CR (a, EFI_FW_VOL_BLOCK_DEVICE, FwVolBlockInstance, FVB_DEVICE_SIGNATURE)
#define FVB_DEVICE_SIGNATURE            SIGNATURE_32 ('F', 'V', 'B', 'N')

#pragma pack (1)

typedef struct {

  EFI_FIRMWARE_VOLUME_HEADER FvHdr;
  EFI_FV_BLOCK_MAP_ENTRY     EndBlockMap;
  VARIABLE_STORE_HEADER      VarHdr;

} FVB_FV_HDR_AND_VARS_TEMPLATE;

typedef struct {
  MEMMAP_DEVICE_PATH        MemMapDevPath;
  EFI_DEVICE_PATH_PROTOCOL  EndDevPath;
} FV_DEVICE_PATH;

#pragma pack ()

typedef struct {
  UINTN                               Signature;
  FV_DEVICE_PATH                      DevicePath;
  VOID                                *BufferPtr;
  UINTN                               BlockSize;
  UINTN                               Size;
  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  FwVolBlockInstance;
} EFI_FW_VOL_BLOCK_DEVICE;


//
// Constants
//
#define EMU_FVB_BLOCK_SIZE (FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize))
#define EMU_FVB_SIZE (2 * FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize))
#define FTW_WRITE_QUEUE_SIZE \
  (FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) - \
   sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER))
#define EMU_FV_HEADER_LENGTH OFFSET_OF (FVB_FV_HDR_AND_VARS_TEMPLATE, VarHdr)

#define NOT_ERASED_BIT 0
#define ERASED_BIT     1
#define ERASED_UINT8   0xff
#define ERASED_UINT32  0xffffffff

//
// Protocol APIs
//
EFI_STATUS
EFIAPI
FvbProtocolGetAttributes (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  OUT       EFI_FVB_ATTRIBUTES_2                *Attributes
  )
;

EFI_STATUS
EFIAPI
FvbProtocolSetAttributes (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN OUT    EFI_FVB_ATTRIBUTES_2                *Attributes
  )
;

EFI_STATUS
EFIAPI
FvbProtocolGetPhysicalAddress (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  OUT       EFI_PHYSICAL_ADDRESS                *Address
  )
;

EFI_STATUS
EFIAPI
FvbProtocolGetBlockSize (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN        EFI_LBA                             Lba,
  OUT       UINTN                               *BlockSize,
  OUT       UINTN                               *NumberOfBlocks
  )
;

EFI_STATUS
EFIAPI
FvbProtocolRead (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN        EFI_LBA                             Lba,
  IN        UINTN                               Offset,
  IN OUT    UINTN                               *NumBytes,
  IN OUT    UINT8                               *Buffer
  )
;

EFI_STATUS
EFIAPI
FvbProtocolWrite (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  IN        EFI_LBA                             Lba,
  IN        UINTN                               Offset,
  IN OUT    UINTN                               *NumBytes,
  IN        UINT8                               *Buffer
  )
;

EFI_STATUS
EFIAPI
FvbProtocolEraseBlocks (
  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL  *This,
  ...
  )
;

#endif