1 files changed, 111 insertions, 0 deletions
diff --git a/DuetPkg/FSVariable/VariableStorage.h b/DuetPkg/FSVariable/VariableStorage.h
new file mode 100644
index 0000000000..3ebfaeb5db
--- /dev/null
+++ b/DuetPkg/FSVariable/VariableStorage.h
@@ -0,0 +1,111 @@
+/*++
+
+Copyright (c) 2006 - 2007, Intel Corporation                                                         
+All rights reserved. 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        EFI_SIGNATURE_16 (VAR_DEFAULT_VALUE, VAR_DEFAULT_VALUE)
+#define VAR_DEFAULT_VALUE_32        EFI_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 DEV_FROM_THIS(a)        CR (a, VS_DEV, VarStore, VARIABLE_STORE_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