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diff --git a/src/mem/ruby/network/simple/SimpleLink.hh b/src/mem/ruby/network/simple/SimpleLink.hh
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+++ b/src/mem/ruby/network/simple/SimpleLink.hh
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+/*
+ * Copyright (c) 2011 Advanced Micro Devices, Inc.
+ * 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.
+ */
+
+#ifndef __MEM_RUBY_NETWORK_SIMPLE_LINK_HH__
+#define __MEM_RUBY_NETWORK_SIMPLE_LINK_HH__
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "params/SimpleExtLink.hh"
+#include "params/SimpleIntLink.hh"
+#include "mem/ruby/network/BasicLink.hh"
+
+class SimpleExtLink : public BasicExtLink
+{
+  public:
+    typedef SimpleExtLinkParams Params;
+    SimpleExtLink(const Params *p);
+    const Params *params() const { return (const Params *)_params; }
+
+    friend class Topology;
+    void print(std::ostream& out) const;
+
+    int m_bw_multiplier;
+};
+
+inline std::ostream&
+operator<<(std::ostream& out, const SimpleExtLink& obj)
+{
+    obj.print(out);
+    out << std::flush;
+    return out;
+}
+
+class SimpleIntLink : public BasicIntLink
+{
+  public:
+    typedef SimpleIntLinkParams Params;
+    SimpleIntLink(const Params *p);
+    const Params *params() const { return (const Params *)_params; }
+
+    friend class Topology;
+    void print(std::ostream& out) const;
+
+    int m_bw_multiplier;
+};
+
+inline std::ostream&
+operator<<(std::ostream& out, const SimpleIntLink& obj)
+{
+    obj.print(out);
+    out << std::flush;
+    return out;
+}
+
+#endif // __MEM_RUBY_NETWORK_SIMPLE_LINK_HH__