3 Caution: This file is used for Duet platform only, do not use them in real platform.
4 All variable code, variable metadata, and variable data used by Duet platform are on
5 disk. They can be changed by user. BIOS is not able to protoect those.
6 Duet trusts all meta data from disk. If variable code, variable metadata and variable
7 data is modified in inproper way, the behavior is undefined.
9 Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
10 This program and the accompanying materials
11 are licensed and made available under the terms and conditions of the BSD License
12 which accompanies this distribution. The full text of the license may be found at
13 http://opensource.org/licenses/bsd-license.php
15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
16 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
24 handles variable store/reads with memory and file
29 #ifndef _VARIABLE_STORAGE_H_
30 #define _VARIABLE_STORAGE_H_
32 #define VAR_DEFAULT_VALUE (0xff)
33 #define VAR_DEFAULT_VALUE_16 SIGNATURE_16 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
34 #define VAR_DEFAULT_VALUE_32 SIGNATURE_32 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE, \
35 VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
37 typedef struct _VARIABLE_STORAGE VARIABLE_STORAGE
;
40 FileStorageConstructor (
41 OUT VARIABLE_STORAGE
**VarStore
,
42 OUT EFI_EVENT_NOTIFY
*GoVirtualEvent
,
43 IN EFI_PHYSICAL_ADDRESS NvStorageBase
,
50 MemStorageConstructor (
51 OUT VARIABLE_STORAGE
**VarStore
,
52 OUT EFI_EVENT_NOTIFY
*GoVirtualEvent
,
58 (EFIAPI
*ERASE_STORE
) (
59 IN VARIABLE_STORAGE
*This
64 (EFIAPI
*WRITE_STORE
) (
65 IN VARIABLE_STORAGE
*This
,
71 struct _VARIABLE_STORAGE
{
74 // Functions to access the storage
80 typedef struct _VS_FILE_INFO
{
81 UINT8
*FileData
; // local buffer for reading acceleration
83 EFI_DEVICE_PATH_PROTOCOL
*DevicePath
; // device having storage file
88 typedef struct _VS_MEM_INFO
{
92 typedef struct _VS_DEV
{
94 VARIABLE_STORAGE VarStore
;
99 // finally visit FileInfo.FileData or MemInfo.MemData
103 VS_FILE_INFO FileInfo
;
109 #define VS_DEV_SIGNATURE SIGNATURE_32 ('$', 'V', 'S', 'D')
110 #define DEV_FROM_THIS(a) CR (a, VS_DEV, VarStore, VS_DEV_SIGNATURE)
112 #define VAR_DATA_PTR(a) ((a)->Info.Data)
113 #define VAR_FILE_DEVICEPATH(a) ((a)->Info.FileInfo.DevicePath)
114 #define VAR_FILE_VOLUMEID(a) ((a)->Info.FileInfo.VolumeId)
115 #define VAR_FILE_FILEPATH(a) ((a)->Info.FileInfo.FilePath)