Various serialization changes to make it possible for the O3CPU to checkpoint.

src/arch/alpha/regfile.hh:
    Define serialize/unserialize functions on MiscRegFile itself.
src/cpu/o3/regfile.hh:
    Remove old commented code.
src/cpu/simple_thread.cc:
src/cpu/simple_thread.hh:
    Push common serialization code to ThreadState level.  Also allow the SimpleThread to be used for checkpointing by other models.
src/cpu/thread_state.cc:
src/cpu/thread_state.hh:
    Move common serialization code into ThreadState.

--HG--
extra : convert_revision : ef64ef515355437439af967eda2e610e8c1b658b

src/cpu/simple_thread.hh

@@ -119,16 +119,18 @@ class SimpleThread : public ThreadState
 #else
     SimpleThread(BaseCPU *_cpu, int _thread_num, Process *_process, int _asid,
                  MemObject *memobj);
-    // Constructor to use SimpleThread to pass reg file around.  Not
-    // used for anything else.
-    SimpleThread(RegFile *regFile);
 #endif
+
+    SimpleThread(ThreadContext *oldContext);
+
     virtual ~SimpleThread();
 
     virtual void takeOverFrom(ThreadContext *oldContext);
 
     void regStats(const std::string &name);
 
+    void copyState(ThreadContext *oldContext);
+
     void serialize(std::ostream &os);
     void unserialize(Checkpoint *cp, const std::string &section);