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diff --git a/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/Protocol/CpuIo.h b/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/Protocol/CpuIo.h
new file mode 100644
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--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/Protocol/CpuIo.h
@@ -0,0 +1,128 @@
+/** @file
+  This code abstracts the CPU IO Protocol which installed by some platform or chipset-specific
+  PEIM that abstracts the processor-visible I/O operations.
+
+  Copyright (c) 2007, 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:  CpuIO.h
+
+  @par Revision Reference:
+  CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec
+  Version 0.9
+
+**/
+
+#ifndef _CPUIO_H_
+#define _CPUIO_H_
+
+#include <gpxe/efi/PiDxe.h>
+
+#define EFI_CPU_IO_PROTOCOL_GUID \
+  { \
+    0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \
+  }
+
+typedef struct _EFI_CPU_IO_PROTOCOL EFI_CPU_IO_PROTOCOL;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_WIDTH
+// *******************************************************
+//
+typedef enum {
+  EfiCpuIoWidthUint8,
+  EfiCpuIoWidthUint16,
+  EfiCpuIoWidthUint32,
+  EfiCpuIoWidthUint64,
+  EfiCpuIoWidthFifoUint8,
+  EfiCpuIoWidthFifoUint16,
+  EfiCpuIoWidthFifoUint32,
+  EfiCpuIoWidthFifoUint64,
+  EfiCpuIoWidthFillUint8,
+  EfiCpuIoWidthFillUint16,
+  EfiCpuIoWidthFillUint32,
+  EfiCpuIoWidthFillUint64,
+  EfiCpuIoWidthMaximum
+} EFI_CPU_IO_PROTOCOL_WIDTH;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_IO_MEM
+// *******************************************************
+//
+/**
+  Enables a driver to access memory-mapped registers in the EFI system memory space.
+  Or, Enables a driver to access registers in the EFI CPU I/O space.
+
+  @param  This                  A pointer to the EFI_CPU_IO_PROTOCOL instance.
+  @param  Width                 Signifies the width of the I/O or Memory operation.
+  @param  Address               The base address of the I/O or Memoryoperation.
+  @param  Count                 The number of I/O or Memory operations to perform.
+                                The number of bytes moved is Width size * Count, starting at Address.
+  @param  Buffer                For read operations, the destination buffer to store the results.
+                                For write operations, the source buffer from which to write data.
+
+  @retval EFI_SUCCESS           The data was read from or written to the EFI system.
+  @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+  @retval EFI_UNSUPPORTED       The Buffer is not aligned for the given Width.
+                                Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_CPU_IO_PROTOCOL_IO_MEM)(
+  IN EFI_CPU_IO_PROTOCOL                *This,
+  IN  EFI_CPU_IO_PROTOCOL_WIDTH         Width,
+  IN  UINT64                            Address,
+  IN  UINTN                             Count,
+  IN  OUT VOID                          *Buffer
+  );
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_ACCESS
+// *******************************************************
+//
+typedef struct {
+  EFI_CPU_IO_PROTOCOL_IO_MEM  Read;
+  EFI_CPU_IO_PROTOCOL_IO_MEM  Write;
+} EFI_CPU_IO_PROTOCOL_ACCESS;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL
+// *******************************************************
+//
+/**
+  @par Protocol Description:
+  Provides the basic memory and I/O interfaces that are used to abstract
+  accesses to devices in a system.
+
+  @param Mem.Read
+  Allows reads from memory-mapped I/O space.
+
+  @param Mem.Write
+  Allows writes to memory-mapped I/O space.
+
+  @param Io.Read
+  Allows reads from I/O space.
+
+  @param Io.Write
+  Allows writes to I/O space.
+
+**/
+struct _EFI_CPU_IO_PROTOCOL {
+  EFI_CPU_IO_PROTOCOL_ACCESS  Mem;
+  EFI_CPU_IO_PROTOCOL_ACCESS  Io;
+};
+
+extern EFI_GUID gEfiCpuIoProtocolGuid;
+
+#endif