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diff --git a/src/base/addr_range.hh b/src/base/addr_range.hh
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+/*
+ * Copyright (c) 2012 ARM Limited
+ * 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.
+ *
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * 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: Nathan Binkert
+ *          Steve Reinhardt
+ *          Andreas Hansson
+ */
+
+#ifndef __BASE_ADDR_RANGE_HH__
+#define __BASE_ADDR_RANGE_HH__
+
+#include "base/types.hh"
+
+class AddrRange
+{
+
+  public:
+
+    Addr start;
+    Addr end;
+
+    AddrRange()
+        : start(1), end(0)
+    {}
+
+    AddrRange(Addr _start, Addr _end)
+        : start(_start), end(_end)
+    {}
+
+    AddrRange(const std::pair<Addr, Addr> &r)
+        : start(r.first), end(r.second)
+    {}
+
+    Addr size() const { return end - start + 1; }
+    bool valid() const { return start < end; }
+};
+
+/**
+ * Keep the operators away from SWIG.
+ */
+#ifndef SWIG
+
+/**
+ * @param range1 is a range.
+ * @param range2 is a range.
+ * @return if range1 is less than range2 and does not overlap range1.
+ */
+inline bool
+operator<(const AddrRange& range1, const AddrRange& range2)
+{
+    return range1.start < range2.start;
+}
+
+/**
+ * @param addr address in the range
+ * @param range range compared against.
+ * @return indicates that the address is not within the range.
+ */
+inline bool
+operator!=(const Addr& addr, const AddrRange& range)
+{
+    return addr < range.start || addr > range.end;
+}
+
+/**
+ * @param range range compared against.
+ * @param pos position compared to the range.
+ * @return indicates that position pos is within the range.
+ */
+inline bool
+operator==(const AddrRange& range, const Addr& addr)
+{
+    return addr >= range.start && addr <= range.end;
+}
+
+inline AddrRange
+RangeEx(Addr start, Addr end)
+{ return std::make_pair(start, end - 1); }
+
+inline AddrRange
+RangeIn(Addr start, Addr end)
+{ return std::make_pair(start, end); }
+
+inline AddrRange
+RangeSize(Addr start, Addr size)
+{ return std::make_pair(start, start + size - 1); }
+
+#endif // SWIG
+
+#endif // __BASE_ADDR_RANGE_HH__