ruby: Working M5 interface and updated Ruby interface.

This changeset also includes a lot of work from Derek Hower <drh5@cs.wisc.edu>

RubyMemory is now both a driver for Ruby and a port for M5.  Changed
makeRequest/hitCallback interface. Brought packets (superficially)
into the sequencer. Modified tester infrastructure to be packet based.
and Ruby can be used together through the example ruby_se.py
script. SPARC parallel applications work, and the timing *seems* right
from combined M5/Ruby debug traces. To run,
% build/ALPHA_SE/m5.debug configs/example/ruby_se.py -c
  tests/test-progs/hello/bin/alpha/linux/hello -n 4 -t

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mem/ruby/system/System.hh b/src/mem/ruby/system/System.hh
index 12063eeed..8679b55c3 100644
--- a/src/mem/ruby/system/System.hh
+++ b/src/mem/ruby/system/System.hh
@@ -63,6 +63,7 @@ class RubySystem {
 public:
   // Constructors
   RubySystem();
+  RubySystem(Driver* _driver); // used when driver is already instantiated (e.g. M5's RubyMem)
 
   // Destructor
   ~RubySystem();
@@ -98,6 +99,8 @@ public:
 
 private:
   // Private Methods
+  void init();
+  void createDriver();
 
   // Private copy constructor and assignment operator
   RubySystem(const RubySystem& obj);
@@ -107,6 +110,7 @@ private:
   Network* m_network_ptr;
   Vector<AbstractChip*> m_chip_vector;
   Profiler* m_profiler_ptr;
+  bool m_preinitialized_driver;
   Driver* m_driver_ptr;
   Tracer* m_tracer_ptr;
   XactIsolationChecker *m_xact_isolation_checker;