1 files changed, 104 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/SmmVariableCommon.h b/MdeModulePkg/Include/Guid/SmmVariableCommon.h
new file mode 100644
index 0000000000..c7fde00ca2
--- /dev/null
+++ b/MdeModulePkg/Include/Guid/SmmVariableCommon.h
@@ -0,0 +1,104 @@
+/** @file
+  The file defined some common structures used for communicating between SMM variable module and SMM variable wrapper module.
+
+Copyright (c) 2011, 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 that 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.
+
+**/
+
+#ifndef _SMM_VARIABLE_COMMON_H_
+#define _SMM_VARIABLE_COMMON_H_
+
+#define EFI_SMM_VARIABLE_WRITE_GUID \
+  { 0x93ba1826, 0xdffb, 0x45dd, { 0x82, 0xa7, 0xe7, 0xdc, 0xaa, 0x3b, 0xbd, 0xf3 } }
+
+extern EFI_GUID gSmmVariableWriteGuid;
+
+//
+// This structure is used for SMM variable. the collected statistics data is saved in SMRAM. It can be got from 
+// SMI handler. The communication buffer should be: 
+// EFI_SMM_COMMUNICATE_HEADER + SMM_VARIABLE_COMMUNICATE_HEADER + payload.
+//
+typedef struct {
+  UINTN       Function;
+  EFI_STATUS  ReturnStatus;
+  UINT8       Data[1];
+} SMM_VARIABLE_COMMUNICATE_HEADER;
+
+//
+// The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE.
+//
+#define SMM_VARIABLE_FUNCTION_GET_VARIABLE            1
+//
+// The payload for this function is SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME.
+// 
+#define SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME  2
+//
+// The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE.
+// 
+#define SMM_VARIABLE_FUNCTION_SET_VARIABLE            3
+//
+// The payload for this function is SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO.
+// 
+#define SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO     4
+//
+// It is a notify event, no extra payload for this function.
+// 
+#define SMM_VARIABLE_FUNCTION_READY_TO_BOOT           5
+//
+// It is a notify event, no extra payload for this function.
+// 
+#define SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE       6
+//
+// The payload for this function is VARIABLE_INFO_ENTRY. The GUID in EFI_SMM_COMMUNICATE_HEADER 
+// is gEfiSmmVariableProtocolGuid.
+//
+#define SMM_VARIABLE_FUNCTION_GET_STATISTICS          7
+
+///
+/// Size of SMM communicate header, without including the payload.
+///
+#define SMM_COMMUNICATE_HEADER_SIZE  (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data))
+
+///
+/// Size of SMM variable communicate header, without including the payload.
+///
+#define SMM_VARIABLE_COMMUNICATE_HEADER_SIZE  (OFFSET_OF (SMM_VARIABLE_COMMUNICATE_HEADER, Data))
+
+///
+/// This structure is used to communicate with SMI handler by SetVariable and GetVariable.
+///
+typedef struct {
+  EFI_GUID    Guid;
+  UINTN       DataSize;
+  UINTN       NameSize;
+  UINT32      Attributes;  
+  CHAR16      Name[1];
+} SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE;
+
+///
+/// This structure is used to communicate with SMI handler by GetNextVariableName.
+///
+typedef struct {
+  EFI_GUID    Guid;
+  UINTN       NameSize;
+  CHAR16      Name[1];
+} SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME;
+
+///
+/// This structure is used to communicate with SMI handler by QueryVariableInfo.
+///
+typedef struct {
+  UINT64          MaximumVariableStorageSize;
+  UINT64          RemainingVariableStorageSize;
+  UINT64          MaximumVariableSize;
+  UINT32          Attributes; 
+} SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO;
+
+#endif // _SMM_VARIABLE_COMMON_H_
+\ No newline at end of file