mirror of https://github.com/acidanthera/audk.git
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
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/*++
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Copyright (c) 2006 - 2007, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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VariableStorage.h
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Abstract:
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handles variable store/reads with memory and file
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Revision History
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--*/
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#ifndef _VARIABLE_STORAGE_H_
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#define _VARIABLE_STORAGE_H_
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#define VAR_DEFAULT_VALUE (0xff)
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#define VAR_DEFAULT_VALUE_16 EFI_SIGNATURE_16 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
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#define VAR_DEFAULT_VALUE_32 EFI_SIGNATURE_32 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE, \
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VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
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typedef struct _VARIABLE_STORAGE VARIABLE_STORAGE;
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EFI_STATUS
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FileStorageConstructor (
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OUT VARIABLE_STORAGE **VarStore,
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OUT EFI_EVENT_NOTIFY *GoVirtualEvent,
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IN EFI_PHYSICAL_ADDRESS NvStorageBase,
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IN UINTN Size,
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IN UINT32 VolumeId,
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IN CHAR16 *FilePath
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);
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EFI_STATUS
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MemStorageConstructor (
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OUT VARIABLE_STORAGE **VarStore,
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OUT EFI_EVENT_NOTIFY *GoVirtualEvent,
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IN UINTN Size
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);
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typedef
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EFI_STATUS
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(EFIAPI *ERASE_STORE) (
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IN VARIABLE_STORAGE *This
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);
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typedef
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EFI_STATUS
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(EFIAPI *WRITE_STORE) (
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IN VARIABLE_STORAGE *This,
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IN UINTN Offset,
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IN UINTN BufferSize,
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IN VOID *Buffer
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);
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struct _VARIABLE_STORAGE {
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//
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// Functions to access the storage
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//
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ERASE_STORE Erase;
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WRITE_STORE Write;
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};
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typedef struct _VS_FILE_INFO {
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UINT8 *FileData; // local buffer for reading acceleration
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EFI_DEVICE_PATH_PROTOCOL *DevicePath; // device having storage file
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UINT32 VolumeId;
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CHAR16 FilePath[256];
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} VS_FILE_INFO;
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typedef struct _VS_MEM_INFO {
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UINT8 *MemData;
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} VS_MEM_INFO;
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typedef struct _VS_DEV {
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UINT32 Signature;
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VARIABLE_STORAGE VarStore;
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UINTN Size;
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union {
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//
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// finally visit FileInfo.FileData or MemInfo.MemData
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//
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UINT8 *Data;
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VS_FILE_INFO FileInfo;
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VS_MEM_INFO MemInfo;
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} Info;
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} VS_DEV;
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#define DEV_FROM_THIS(a) CR (a, VS_DEV, VarStore, VARIABLE_STORE_SIGNATURE)
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#define VAR_DATA_PTR(a) ((a)->Info.Data)
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#define VAR_FILE_DEVICEPATH(a) ((a)->Info.FileInfo.DevicePath)
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#define VAR_FILE_VOLUMEID(a) ((a)->Info.FileInfo.VolumeId)
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#define VAR_FILE_FILEPATH(a) ((a)->Info.FileInfo.FilePath)
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#endif
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