sim: Remove SimObject::setMemoryMode

Remove SimObject::setMemoryMode from the main SimObject class since it
is only valid for the System class. In addition to removing the method
from the C++ sources, this patch also removes getMemoryMode and
changeTiming from SimObject.py and updates the simulation code to call
the (get|set)MemoryMode method on the System object instead.

src/python/m5/SimObject.py

@@ -1050,19 +1050,6 @@ class SimObject(object):
         for portRef in self._port_refs.itervalues():
             portRef.ccConnect()
 
-    def getMemoryMode(self):
-        if not isinstance(self, m5.objects.System):
-            return None
-
-        return self._ccObject.getMemoryMode()
-
-    def changeTiming(self, mode):
-        if isinstance(self, m5.objects.System):
-            # i don't know if there's a better way to do this - calling
-            # setMemoryMode directly from self._ccObject results in calling
-            # SimObject::setMemoryMode, not the System::setMemoryMode
-            self._ccObject.setMemoryMode(mode)
-
     def takeOverFrom(self, old_cpu):
         self._ccObject.takeOverFrom(old_cpu._ccObject)
 

src/python/m5/simulate.py

@@ -194,8 +194,7 @@ def changeToAtomic(system):
     if system.getMemoryMode() != objects.params.atomic:
         doDrain(system)
         print "Changing memory mode to atomic"
-        for obj in system.descendants():
-            obj.changeTiming(objects.params.atomic)
+        system.setMemoryMode(objects.params.atomic)
 
 def changeToTiming(system):
     if not isinstance(system, (objects.Root, objects.System)):
@@ -204,8 +203,7 @@ def changeToTiming(system):
 
     if system.getMemoryMode() != objects.params.timing:
         print "Changing memory mode to timing"
-        for obj in system.descendants():
-            obj.changeTiming(objects.params.timing)
+        system.setMemoryMode(objects.params.timing)
 
 def switchCpus(cpuList):
     print "switching cpus"

src/sim/sim_object.cc

@@ -163,12 +163,6 @@ SimObject::resume()
     state = Running;
 }
 
-void
-SimObject::setMemoryMode(Enums::MemoryMode new_mode)
-{
-    panic("setMemoryMode() should only be called on systems");
-}
-
 void
 SimObject::switchOut()
 {

src/sim/sim_object.hh

@@ -255,13 +255,6 @@ class SimObject : public EventManager, public Serializable
      */
     virtual void resume();
 
-    /**
-     * Change the memory mode the simulator operates in.
-     *
-     * @note Should only be implemented in the System object.
-     */
-    virtual void setMemoryMode(Enums::MemoryMode new_mode);
-
     /**
      * Prepare a CPU model to be switched out, invoked on active CPUs
      * that are about to be replaced.