python: Move native wrappers to the _m5 namespace

Swig wrappers for native objects currently share the _m5.internal name
space with Python code. This is undesirable if we ever want to switch
from Swig to some other framework for native binding (e.g., PyBind11
or Boost::Python). This changeset moves all of such wrappers to the
_m5 namespace, which is now reserved for native code.

Change-Id: I2d2bc12dbc05b57b7c5a75f072e08124413d77f3
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

src/python/m5/ticks.py

@@ -34,11 +34,11 @@ tps_fixed = False    # once set to true, can't be changed
 
 # fix the global frequency and tell C++ about it
 def fixGlobalFrequency():
-    import internal
+    import _m5.core
     global tps, tps_fixed
     if not tps_fixed:
         tps_fixed = True
-        internal.core.setClockFrequency(int(tps))
+        _m5.core.setClockFrequency(int(tps))
         print "Global frequency set at %d ticks per second" % int(tps)
 
 def setGlobalFrequency(ticksPerSecond):