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diff --git a/configs/ruby/Ruby.py b/configs/ruby/Ruby.py
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+# Copyright (c) 2006-2007 The Regents of The University of Michigan
+# Copyright (c) 2009 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.
+#
+# Authors: Brad Beckmann
+
+import m5
+from m5.objects import *
+from m5.defines import buildEnv
+from m5.util import addToPath
+
+import MOESI_hammer
+
+def create_system(options, physmem):
+
+    protocol = buildEnv['PROTOCOL']
+
+    if protocol == "MOESI_hammer":
+        (sequencers, dir_cntrls, all_cntrls) = MOESI_hammer.create_system( \
+                                                options, physmem)
+    else:
+         print "Error: unsupported ruby protocol"
+         sys.exit(1)
+
+    #
+    # Important: the topology constructor must be called before the network
+    # constructor.
+    #
+    network = SimpleNetwork(topology = makeCrossbar(all_cntrls))
+
+    mem_size_mb = sum([int(dir_cntrl.directory.size_mb) \
+                       for dir_cntrl in dir_cntrls])
+
+    #
+    # determine the number of memory controllers and other memory controller
+    # parameters for the profiler
+    #
+    mcCount = len(dir_cntrls)
+    banksPerRank = dir_cntrls[0].memBuffer.banks_per_rank
+    ranksPerDimm = dir_cntrls[0].memBuffer.ranks_per_dimm
+    dimmsPerChannel = dir_cntrls[0].memBuffer.dimms_per_channel
+
+    ruby_profiler = RubyProfiler(mem_cntrl_count = mcCount,
+                                 banks_per_rank = banksPerRank,
+                                 ranks_per_dimm = ranksPerDimm,
+                                 dimms_per_channel = dimmsPerChannel)
+    
+    ruby = RubySystem(clock = '1GHz',
+                      network = network,
+                      profiler = ruby_profiler,
+                      tracer = RubyTracer(),
+                      debug = RubyDebug(filter_string = 'none',
+                                        verbosity_string = 'none',
+                                        protocol_trace = False),
+                      mem_size_mb = mem_size_mb)
+
+    ruby.cpu_ruby_ports = sequencers
+
+    return ruby