]>
git.proxmox.com Git - mirror_edk2.git/blob - DuetPkg/FSVariable/MemStorage.c
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 emulated memory
29 #include "FSVariable.h"
33 OnVirtualAddressChangeMs (
41 IN VARIABLE_STORAGE
*This
47 IN VARIABLE_STORAGE
*This
,
54 MemStorageConstructor (
55 OUT VARIABLE_STORAGE
**VarStore
,
56 OUT EFI_EVENT_NOTIFY
*GoVirtualEvent
,
63 Status
= gBS
->AllocatePool (EfiRuntimeServicesData
, sizeof(VS_DEV
), (VOID
**) &Dev
);
64 ASSERT_EFI_ERROR (Status
);
66 ZeroMem (Dev
, sizeof(VS_DEV
));
68 Dev
->Signature
= VS_DEV_SIGNATURE
;
71 Dev
->VarStore
.Erase
= MemEraseStore
;
72 Dev
->VarStore
.Write
= MemWriteStore
;
74 Status
= gBS
->AllocatePool (EfiRuntimeServicesData
, Size
, (VOID
**) &VAR_DATA_PTR (Dev
));
75 ASSERT_EFI_ERROR (Status
);
77 DEBUG ((EFI_D_ERROR
, "VStorage: Size = 0x%x\n", Size
));
79 *VarStore
= &Dev
->VarStore
;
80 *GoVirtualEvent
= OnVirtualAddressChangeMs
;
87 OnVirtualAddressChangeMs (
94 Dev
= DEV_FROM_THIS (Context
);
96 EfiConvertPointer (0, (VOID
**)&VAR_DATA_PTR (Dev
));
97 EfiConvertPointer (0, (VOID
**)&Dev
->VarStore
.Erase
);
98 EfiConvertPointer (0, (VOID
**)&Dev
->VarStore
.Write
);
104 IN VARIABLE_STORAGE
*This
109 Dev
= DEV_FROM_THIS(This
);
110 SetMem (VAR_DATA_PTR (Dev
), Dev
->Size
, VAR_DEFAULT_VALUE
);
118 IN VARIABLE_STORAGE
*This
,
126 Dev
= DEV_FROM_THIS(This
);
128 ASSERT (Offset
+ BufferSize
< Dev
->Size
);
130 // For better performance
131 if (VAR_DATA_PTR (Dev
) + Offset
!= UserBuffer
) {
132 CopyMem (VAR_DATA_PTR (Dev
) + Offset
, UserBuffer
, BufferSize
);