1 files changed, 86 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/VariableFormat.h b/MdeModulePkg/Include/Guid/VariableFormat.h
index 2276262..0db3a22 100644
--- a/MdeModulePkg/Include/Guid/VariableFormat.h
+++ b/MdeModulePkg/Include/Guid/VariableFormat.h
@@ -157,4 +157,90 @@ struct _VARIABLE_INFO_ENTRY {
   BOOLEAN             Volatile;    ///< TRUE if volatile, FALSE if non-volatile.
 };
 
+//
+// 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;
+
+///
+/// This structure is used to communicate with SMI handler to get variable statistics information.
+///
+typedef VARIABLE_INFO_ENTRY  SMM_VARIABLE_COMMUNICATE_VARIABLE_INFO_ENTRY;
+
 #endif // _EFI_VARIABLE_H_