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/*++
Caution: This file is used for Duet platform only, do not use them in real platform.
All variable code, variable metadata, and variable data used by Duet platform are on
disk. They can be changed by user. BIOS is not able to protoect those.
Duet trusts all meta data from disk. If variable code, variable metadata and variable
data is modified in inproper way, the behavior is undefined.
Copyright (c) 2006 - 2014, 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:
VariableStorage.h
Abstract:
handles variable store/reads with memory and file
Revision History
--*/
#ifndef _VARIABLE_STORAGE_H_
#define _VARIABLE_STORAGE_H_
#define VAR_DEFAULT_VALUE (0xff)
#define VAR_DEFAULT_VALUE_16 SIGNATURE_16 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
#define VAR_DEFAULT_VALUE_32 SIGNATURE_32 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE, \
VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
typedef struct _VARIABLE_STORAGE VARIABLE_STORAGE;
EFI_STATUS
FileStorageConstructor (
OUT VARIABLE_STORAGE **VarStore,
OUT EFI_EVENT_NOTIFY *GoVirtualEvent,
IN EFI_PHYSICAL_ADDRESS NvStorageBase,
IN UINTN Size,
IN UINT32 VolumeId,
IN CHAR16 *FilePath
);
EFI_STATUS
MemStorageConstructor (
OUT VARIABLE_STORAGE **VarStore,
OUT EFI_EVENT_NOTIFY *GoVirtualEvent,
IN UINTN Size
);
typedef
EFI_STATUS
(EFIAPI *ERASE_STORE) (
IN VARIABLE_STORAGE *This
);
typedef
EFI_STATUS
(EFIAPI *WRITE_STORE) (
IN VARIABLE_STORAGE *This,
IN UINTN Offset,
IN UINTN BufferSize,
IN VOID *Buffer
);
struct _VARIABLE_STORAGE {
//
// Functions to access the storage
//
ERASE_STORE Erase;
WRITE_STORE Write;
};
typedef struct _VS_FILE_INFO {
UINT8 *FileData; // local buffer for reading acceleration
EFI_DEVICE_PATH_PROTOCOL *DevicePath; // device having storage file
UINT32 VolumeId;
CHAR16 FilePath[256];
} VS_FILE_INFO;
typedef struct _VS_MEM_INFO {
UINT8 *MemData;
} VS_MEM_INFO;
typedef struct _VS_DEV {
UINT32 Signature;
VARIABLE_STORAGE VarStore;
UINTN Size;
union {
//
// finally visit FileInfo.FileData or MemInfo.MemData
//
UINT8 *Data;
VS_FILE_INFO FileInfo;
VS_MEM_INFO MemInfo;
} Info;
} VS_DEV;
#define VS_DEV_SIGNATURE SIGNATURE_32 ('$', 'V', 'S', 'D')
#define DEV_FROM_THIS(a) CR (a, VS_DEV, VarStore, VS_DEV_SIGNATURE)
#define VAR_DATA_PTR(a) ((a)->Info.Data)
#define VAR_FILE_DEVICEPATH(a) ((a)->Info.FileInfo.DevicePath)
#define VAR_FILE_VOLUMEID(a) ((a)->Info.FileInfo.VolumeId)
#define VAR_FILE_FILEPATH(a) ((a)->Info.FileInfo.FilePath)
#endif
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