1 files changed, 41 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Include/Guid/VariableIndexTable.h b/roms/edk2/MdeModulePkg/Include/Guid/VariableIndexTable.h
new file mode 100644
index 000000000..5d6123330
--- /dev/null
+++ b/roms/edk2/MdeModulePkg/Include/Guid/VariableIndexTable.h
@@ -0,0 +1,41 @@
+/** @file
+  The variable data structures are related to EDK II-specific implementation of UEFI variables.
+  VariableFormat.h defines variable data headers and variable storage region headers.
+
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __VARIABLE_INDEX_TABLE_H__
+#define __VARIABLE_INDEX_TABLE_H__
+
+typedef struct {
+  VARIABLE_HEADER *CurrPtr;
+  VARIABLE_HEADER *EndPtr;
+  VARIABLE_HEADER *StartPtr;
+} VARIABLE_POINTER_TRACK;
+
+#define VARIABLE_INDEX_TABLE_VOLUME 122
+
+#define EFI_VARIABLE_INDEX_TABLE_GUID \
+  { 0x8cfdb8c8, 0xd6b2, 0x40f3, { 0x8e, 0x97, 0x02, 0x30, 0x7c, 0xc9, 0x8b, 0x7c } }
+
+extern EFI_GUID gEfiVariableIndexTableGuid;
+
+///
+/// Use this data structure to store variable-related info, which can decrease
+/// the cost of access to NV.
+///
+typedef struct {
+  UINT16          Length;
+  UINT16          GoneThrough;
+  VARIABLE_HEADER *EndPtr;
+  VARIABLE_HEADER *StartPtr;
+  ///
+  /// This field is used to store the distance of two neighbouring VAR_ADDED type variables.
+  /// The meaning of the field is implement-dependent.
+  UINT16          Index[VARIABLE_INDEX_TABLE_VOLUME];
+} VARIABLE_INDEX_TABLE;
+
+#endif // __VARIABLE_INDEX_TABLE_H__