diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.c b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
index bccff24..9b602a1 100644
--- a/UefiCpuPkg/CpuMpPei/CpuMpPei.c
+++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.c
@@ -455,6 +455,8 @@
   ExchangeInfo->PmodeOffset        = PeiCpuMpData->AddressMap.PModeEntryOffset;
   ExchangeInfo->LmodeOffset        = PeiCpuMpData->AddressMap.LModeEntryOffset;
   ExchangeInfo->Cr3                = AsmReadCr3 ();
+  ExchangeInfo->CodeSegment        = AsmReadCs ();
+  ExchangeInfo->DataSegment        = AsmReadDs ();
   ExchangeInfo->CFunction          = (UINTN) ApCFunction;
   ExchangeInfo->NumApsExecuting    = 0;
   ExchangeInfo->PeiCpuMpData       = PeiCpuMpData;
diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.h b/UefiCpuPkg/CpuMpPei/CpuMpPei.h
index 5e56934..4c114de 100644
--- a/UefiCpuPkg/CpuMpPei/CpuMpPei.h
+++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.h
@@ -119,6 +119,8 @@
   UINTN                 BufferStart;
   UINTN                 PmodeOffset;
   UINTN                 NumApsExecuting;
+  UINTN                 CodeSegment;
+  UINTN                 DataSegment;
   UINTN                 LmodeOffset;
   UINTN                 Cr3;
   PEI_CPU_MP_DATA       *PeiCpuMpData;
diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc
index fc637cc..a88185e 100644
--- a/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc
+++ b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc
@@ -1,5 +1,5 @@
 ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2015 - 2016, 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
 ; which accompanies this distribution.  The full text of the license may be found at
@@ -37,4 +37,6 @@
 BufferStartLocation           equ        LockLocation + 1Ch
 PmodeOffsetLocation           equ        LockLocation + 20h
 NumApsExecutingLoction        equ        LockLocation + 24h
+CodeSegmentLocation           equ        LockLocation + 28h
+DataSegmentLocation           equ        LockLocation + 2Ch
 
diff --git a/UefiCpuPkg/CpuMpPei/X64/MpEqu.inc b/UefiCpuPkg/CpuMpPei/X64/MpEqu.inc
index ab851cf..30c7f61 100644
--- a/UefiCpuPkg/CpuMpPei/X64/MpEqu.inc
+++ b/UefiCpuPkg/CpuMpPei/X64/MpEqu.inc
@@ -1,5 +1,5 @@
 ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2015 - 2016, 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
 ; which accompanies this distribution.  The full text of the license may be found at
@@ -39,7 +39,9 @@
 BufferStartLocation           equ        LockLocation + 34h
 PmodeOffsetLocation           equ        LockLocation + 3Ch
 NumApsExecutingLoction        equ        LockLocation + 44h
-LmodeOffsetLocation           equ        LockLocation + 4Ch
-Cr3Location                   equ        LockLocation + 54h
+CodeSegmentLocation           equ        LockLocation + 4Ch
+DataSegmentLocation           equ        LockLocation + 54h
+LmodeOffsetLocation           equ        LockLocation + 5Ch
+Cr3Location                   equ        LockLocation + 64h
 
 ;-------------------------------------------------------------------------------