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diff --git a/src/sim/sim_events.cc b/src/sim/sim_events.cc
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+/*
+ * Copyright (c) 2002-2005 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
+ */
+
+#include <string>
+
+#include "base/callback.hh"
+#include "base/hostinfo.hh"
+#include "sim/eventq.hh"
+#include "sim/param.hh"
+#include "sim/sim_events.hh"
+#include "sim/sim_exit.hh"
+#include "sim/startup.hh"
+#include "sim/stats.hh"
+
+using namespace std;
+
+//
+// handle termination event
+//
+void
+SimExitEvent::process()
+{
+ // This event does not autodelete because exitNow may be called,
+ // and the function will never be allowed to finish.
+ if (theQueue() == &mainEventQueue) {
+ string _cause = cause;
+ int _code = code;
+ delete this;
+ exitNow(_cause, _code);
+ } else {
+ new SimExitEvent(cause, code);
+ delete this;
+ }
+}
+
+
+const char *
+SimExitEvent::description()
+{
+ return "simulation termination";
+}
+
+//
+// constructor: automatically schedules at specified time
+//
+CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause,
+ Tick _when, int &_downCounter)
+ : Event(q, Sim_Exit_Pri),
+ cause(_cause),
+ downCounter(_downCounter)
+{
+ // catch stupid mistakes
+ assert(downCounter > 0);
+
+ schedule(_when);
+}
+
+
+//
+// handle termination event
+//
+void
+CountedExitEvent::process()
+{
+ if (--downCounter == 0) {
+ new SimExitEvent(cause, 0);
+ }
+}
+
+
+const char *
+CountedExitEvent::description()
+{
+ return "counted exit";
+}
+
+#ifdef CHECK_SWAP_CYCLES
+new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES);
+#endif
+
+void
+CheckSwapEvent::process()
+{
+ /* Check the amount of free swap space */
+ long swap;
+
+ /* returns free swap in KBytes */
+ swap = procInfo("/proc/meminfo", "SwapFree:");
+
+ if (swap < 1000)
+ ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap);
+
+ if (swap < 100) {
+ cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n";
+ new SimExitEvent("Lack of swap space");
+ }
+
+ schedule(curTick + interval);
+}
+
+const char *
+CheckSwapEvent::description()
+{
+ return "check swap";
+}
+
+//
+// handle progress event: print message and reschedule
+//
+void
+ProgressEvent::process()
+{
+ DPRINTFN("ProgressEvent\n");
+ // reschedule for next interval
+ schedule(curTick + interval);
+}
+
+
+const char *
+ProgressEvent::description()
+{
+ return "progress message";
+}