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diff --git a/src/arch/x86/regs/segment.hh b/src/arch/x86/regs/segment.hh
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+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_SEGMENTREGS_HH__
+#define __ARCH_X86_SEGMENTREGS_HH__
+
+namespace X86ISA
+{
+    enum SegmentRegIndex
+    {
+        SEGMENT_REG_ES,
+        SEGMENT_REG_CS,
+        SEGMENT_REG_SS,
+        SEGMENT_REG_DS,
+        SEGMENT_REG_FS,
+        SEGMENT_REG_GS,
+        SEGMENT_REG_HS, // Temporary descriptor
+        SEGMENT_REG_TSL, // Local descriptor table
+        SEGMENT_REG_TSG, // Global descriptor table
+        SEGMENT_REG_LS, // Flat segment
+        SEGMENT_REG_MS, // Emulation memory
+        // These shouldn't be used directly in a load or store since they
+        // are likely accessed in other ways in a real machine. For instance,
+        // they may be loaded into the temporary segment register on demand.
+        SYS_SEGMENT_REG_TR,
+        SYS_SEGMENT_REG_IDTR,
+
+        NUM_SEGMENTREGS
+    };
+};
+
+#endif // __ARCH_X86_SEGMENTREGS_HH__