sim: Reuse the code to change memory mode.

changeToAtomic and changeToTiming both do essentially the same thing,
they check the type of their input argument, drain the system, and
switch to the desired memory mode. This patch moves all of that code
to a separate method (changeMemoryMode) and calls that from both
changeToAtomic and changeToTiming.

src/python/m5/simulate.py

@@ -192,24 +192,23 @@ def checkpoint(dir):
     internal.core.serializeAll(dir)
     resume(root)
 
-def changeToAtomic(system):
+def changeMemoryMode(system, mode):
     if not isinstance(system, (objects.Root, objects.System)):
         raise TypeError, "Parameter of type '%s'.  Must be type %s or %s." % \
               (type(system), objects.Root, objects.System)
-    if system.getMemoryMode() != objects.params.atomic:
+    if system.getMemoryMode() != mode:
         doDrain(system)
-        print "Changing memory mode to atomic"
-        system.setMemoryMode(objects.params.atomic)
+        system.setMemoryMode(mode)
+    else:
+        print "System already in target mode. Memory mode unchanged."
 
-def changeToTiming(system):
-    if not isinstance(system, (objects.Root, objects.System)):
-        raise TypeError, "Parameter of type '%s'.  Must be type %s or %s." % \
-              (type(system), objects.Root, objects.System)
+def changeToAtomic(system, **kwargs):
+    print "Changing memory mode to atomic"
+    changeMemoryMode(system, objects.params.atomic, **kwargs)
 
-    if system.getMemoryMode() != objects.params.timing:
-        doDrain(system)
-        print "Changing memory mode to timing"
-        system.setMemoryMode(objects.params.timing)
+def changeToTiming(system, **kwargs):
+    print "Changing memory mode to timing"
+    changeMemoryMode(system, objects.params.timing, **kwargs)
 
 def switchCpus(cpuList):
     print "switching cpus"