Factor code out of main.cc and main.i into a bunch of files

so things are organized in a more sensible manner.  Take apart
finalInit and expose the individual functions which are now
called from python.  Make checkpointing a bit easier to use.

--HG--
extra : convert_revision : f470ddabbb47103e7b4734ef753c40089f2dcd9d

1 files changed, 121 insertions, 0 deletions

diff --git a/src/sim/simulate.cc b/src/sim/simulate.cc
new file mode 100644
index 000000000..55cbb50a9
--- /dev/null
+++ b/src/sim/simulate.cc
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2006 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
+ *          Steve Reinhardt
+ */
+
+#include "base/misc.hh"
+#include "base/pollevent.hh"
+#include "sim/stat_control.hh"
+#include "sim/async.hh"
+#include "sim/eventq.hh"
+#include "sim/host.hh"
+#include "sim/sim_events.hh"
+#include "sim/sim_exit.hh"
+#include "sim/simulate.hh"
+
+/** Simulate for num_cycles additional cycles.  If num_cycles is -1
+ * (the default), do not limit simulation; some other event must
+ * terminate the loop.  Exported to Python via SWIG.
+ * @return The SimLoopExitEvent that caused the loop to exit.
+ */
+SimLoopExitEvent *
+simulate(Tick num_cycles)
+{
+    warn("Entering event queue @ %d.  Starting simulation...\n", curTick);
+
+    if (num_cycles < 0)
+        fatal("simulate: num_cycles must be >= 0 (was %d)\n", num_cycles);
+    else if (curTick + num_cycles < 0)  //Overflow
+        num_cycles = MaxTick;
+    else
+        num_cycles = curTick + num_cycles;
+
+    Event *limit_event;
+    limit_event = schedExitSimLoop("simulate() limit reached", num_cycles);
+
+    while (1) {
+        // there should always be at least one event (the SimLoopExitEvent
+        // we just scheduled) in the queue
+        assert(!mainEventQueue.empty());
+        assert(curTick <= mainEventQueue.nextTick() &&
+               "event scheduled in the past");
+
+        // forward current cycle to the time of the first event on the
+        // queue
+        curTick = mainEventQueue.nextTick();
+        Event *exit_event = mainEventQueue.serviceOne();
+        if (exit_event != NULL) {
+            // hit some kind of exit event; return to Python
+            // event must be subclass of SimLoopExitEvent...
+            SimLoopExitEvent *se_event;
+            se_event = dynamic_cast<SimLoopExitEvent *>(exit_event);
+
+            if (se_event == NULL)
+                panic("Bogus exit event class!");
+
+            // if we didn't hit limit_event, delete it
+            if (se_event != limit_event) {
+                assert(limit_event->scheduled());
+                limit_event->deschedule();
+                delete limit_event;
+            }
+
+            return se_event;
+        }
+
+        if (async_event) {
+            async_event = false;
+            if (async_statdump || async_statreset) {
+                async_statdump = false;
+                async_statreset = false;
+
+                Stats::StatEvent(async_statdump, async_statreset);
+            }
+
+            if (async_exit) {
+                async_exit = false;
+                exitSimLoop("user interrupt received");
+            }
+
+            if (async_io || async_alarm) {
+                async_io = false;
+                async_alarm = false;
+                pollQueue.service();
+            }
+
+            if (async_exception) {
+                async_exception = false;
+                return NULL;
+            }
+        }
+    }
+
+    // not reached... only exit is return on SimLoopExitEvent
+}
+