diff --git a/src/sim/eventq.cc b/src/sim/eventq.cc
index 78524fe51..b389efcf2 100644
--- a/src/sim/eventq.cc
+++ b/src/sim/eventq.cc
@@ -373,6 +373,14 @@ EventQueue::debugVerify() const
     return true;
 }
 
+Event*
+EventQueue::replaceHead(Event* s)
+{
+    Event* t = head;
+    head = s;
+    return t;
+}
+
 void
 dumpMainQueue()
 {
diff --git a/src/sim/eventq.hh b/src/sim/eventq.hh
index 1509d05a5..6dc25e760 100644
--- a/src/sim/eventq.hh
+++ b/src/sim/eventq.hh
@@ -408,6 +408,16 @@ class EventQueue : public Serializable
 
     bool debugVerify() const;
 
+    /**
+     *  function for replacing the head of the event queue, so that a
+     *  different set of events can run without disturbing events that have
+     *  already been scheduled. Already scheduled events can be processed
+     *  by replacing the original head back.
+     *  USING THIS FUNCTION CAN BE DANGEROUS TO THE HEALTH OF THE SIMULATOR.
+     *  NOT RECOMMENDED FOR USE.
+     */
+    Event* replaceHead(Event* s);
+
 #ifndef SWIG
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);