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diff --git a/src/mem/RubyMemory.py b/src/mem/RubyMemory.py
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+++ b/src/mem/RubyMemory.py
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+# Copyright (c) 2005-2008 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
+
+from m5.params import *
+from m5.proxy import *
+
+from PhysicalMemory import PhysicalMemory
+
+class RubyMemory(PhysicalMemory):
+    type = 'RubyMemory'
+    clock = Param.Clock('1t', "ruby clock speed")
+    phase = Param.Latency('0ns', "ruby clock phase")
+    config_file = Param.String("", "path to the Ruby config file")
+    config_options = Param.String("", "extra Ruby options (one per line)")
+    stats_file = Param.String("ruby.stats",
+        "file to which ruby dumps its stats")
+    num_cpus = Param.Int(1, "Number of CPUs connected to the Ruby memory")
+    debug = Param.Bool(False, "Use ruby debug")
+    debug_file = Param.String("",
+        "path to the Ruby debug output file (stdout if blank)")
+