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diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ipf/Ds64Macros.i b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/Ds64Macros.i
new file mode 100644
index 0000000000..7316e199b5
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+++ b/MdeModulePkg/Universal/DebugSupportDxe/Ipf/Ds64Macros.i
@@ -0,0 +1,80 @@
+/// @file
+///  This is set of macros used in calculating offsets in the IVT.
+///
+/// Copyright (c) 2006, 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: Ds64Macros.i
+///
+///
+
+
+#define EXCPT_EXTERNAL_INTERRUPT 12
+#define MASK_0_4        0x000000000000001F  // mask bits 0 through 4
+#define SLOT0           0
+#define SLOT1           1
+#define SLOT2           2
+
+#define PSR_DT          17
+#define PSR_TB          26
+#define PSR_RT          27
+#define PSR_IS          34
+#define PSR_IT          36
+#define PSR_IC          13
+#define PSR_I           14
+#define PSR_SS          40
+#define PSR_BN          44
+#define PSR_RI_MASK     0x60000000000
+
+#define EXCPT_EXTERNAL_INTERRUPT 12
+
+#define SCRATCH_REG0    r23
+#define SCRATCH_REG1    r24
+#define SCRATCH_REG2    r25
+#define SCRATCH_REG3    r26
+#define SCRATCH_REG4    r27
+#define SCRATCH_REG5    r28
+#define SCRATCH_REG6    r29
+#define PR_REG          r30
+#define B0_REG          r31
+
+
+// EXT_INT_OFFSET is the offset of the external interrupt entry in the IVT
+#define EXT_INT_ENTRY_OFFSET    0x03000
+
+// PATCH_ENTRY_OFFSET is the offset into the IVT of the entry that is coopted (stolen)
+// for use by the handler.  The entire entry is restored when the handler is
+// unloaded.
+#define PATCH_ENTRY_OFFSET      0x03400
+
+// PATCH_BUNDLES is the number of bundles actually in the patch
+#define NUM_PATCH_BUNDLES       ((EndPatchCode - PatchCode) / 0x10)
+
+// A hard coded branch back into the external interrupt IVT entry's second bundle
+// is put here, just in case the original bundle zero did not have a branch
+// This is the last bundle in the reserved IVT entry
+#define FAILSAFE_BRANCH_OFFSET  (PATCH_ENTRY_OFFSET + 0x400 - 0x10)
+
+// the original external interrupt IVT entry bundle zero is copied and relocated
+// here... also in the reserved IVT entry
+// This is the second-to-last bundle in the reserved IVT entry
+#define RELOCATED_EXT_INT       (PATCH_ENTRY_OFFSET + 0x400 - 0x20)
+
+// The patch is actually stored at the end of IVT:PATCH_ENTRY.  The PATCH_OFFSET
+// is the offset into IVT where the patch is actually stored.  It is carefully
+// located so that when we run out of patch code, the next bundle is the
+// relocated bundle 0 from the original external interrupt handler
+#define PATCH_OFFSET            (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCode ) - 0x20)
+
+#define PATCH_RETURN_OFFSET     (PATCH_ENTRY_OFFSET + 0x400 - ( EndPatchCode - PatchCodeRet ) - 0x20)
+
+// PATCH_BRANCH is used only in the new bundle that is placed at the beginning
+// of the external interrupt IVT entry.
+#define PATCH_BRANCH            (PATCH_OFFSET - EXT_INT_ENTRY_OFFSET)
+