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diff --git a/src/sim/System.py b/src/sim/System.py
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+# Copyright (c) 2005-2007 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.SimObject import SimObject
+from m5.params import *
+from m5.proxy import *
+from m5 import build_env
+from PhysicalMemory import *
+
+class MemoryMode(Enum): vals = ['invalid', 'atomic', 'timing']
+
+class System(SimObject):
+    type = 'System'
+    physmem = Param.PhysicalMemory(Parent.any, "phsyical memory")
+    mem_mode = Param.MemoryMode('atomic', "The mode the memory system is in")
+    if build_env['FULL_SYSTEM']:
+        boot_cpu_frequency = Param.Frequency(Self.cpu[0].clock.frequency,
+                                             "boot processor frequency")
+        init_param = Param.UInt64(0, "numerical value to pass into simulator")
+        boot_osflags = Param.String("a", "boot flags to pass to the kernel")
+        kernel = Param.String("", "file that contains the kernel code")
+        readfile = Param.String("", "file to read startup script from")
+        symbolfile = Param.String("", "file to get the symbols from")