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diff --git a/src/learning_gem5/part2/HelloObject.py b/src/learning_gem5/part2/HelloObject.py
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+++ b/src/learning_gem5/part2/HelloObject.py
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+# -*- coding: utf-8 -*-
+# Copyright (c) 2017 Jason Lowe-Power
+# 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: Jason Lowe-Power
+
+from m5.params import *
+from m5.SimObject import SimObject
+
+class HelloObject(SimObject):
+    type = 'HelloObject'
+    cxx_header = "learning_gem5/part2/hello_object.hh"
+
+    time_to_wait = Param.Latency("Time before firing the event")
+    number_of_fires = Param.Int(1, "Number of times to fire the event before "
+                                   "goodbye")
+
+    goodbye_object = Param.GoodbyeObject("A goodbye object")
+
+class GoodbyeObject(SimObject):
+    type = 'GoodbyeObject'
+    cxx_header = "learning_gem5/part2/goodbye_object.hh"
+
+    buffer_size = Param.MemorySize('1kB',
+                                   "Size of buffer to fill with goodbye")
+    write_bandwidth = Param.MemoryBandwidth('100MB/s', "Bandwidth to fill "
+                                            "the buffer")