1 files changed, 25 insertions, 0 deletions
diff --git a/src/sim/Root.py b/src/sim/Root.py
index fff998e0d..c7404a11f 100644
--- a/src/sim/Root.py
+++ b/src/sim/Root.py
@@ -28,7 +28,32 @@
 
 from m5.SimObject import SimObject
 from m5.params import *
+from m5.util import fatal
 
 class Root(SimObject):
+
+    _the_instance = None
+
+    def __new__(cls, **kwargs):
+        if Root._the_instance:
+            fatal("Attempt to allocate multiple instances of Root.")
+            return None
+
+        # first call: allocate the unique instance
+        #
+        # If SimObject ever implements __new__, we may want to pass
+        # kwargs here, but for now this goes straight to
+        # object.__new__ which prints an ugly warning if you pass it
+        # args.  Seems like a bad design but that's the way it is.
+        Root._the_instance = SimObject.__new__(cls)
+        return Root._the_instance
+        
+    @classmethod
+    def getInstance(cls):
+        return Root._the_instance
+
+    def path(self):
+        return 'root'
+
     type = 'Root'
     dummy = Param.Int(0, "We don't support objects without params")