m5: Regression Tester Update

This patch includes the necessary regression updates to test the new ruby
configuration system.  The patch includes support for multiple ruby protocols
and adds the ruby random tester.  The patch removes atomic mode test for
ruby since ruby does not support atomic mode acceses.  These tests can be
added back in when ruby supports atomic mode for real.

--HG--
rename : tests/quick/50.memtest/test.py => tests/quick/60.rubytest/test.py

tests/SConscript

@@ -264,11 +264,23 @@ if env['FULL_SYSTEM']:
 else:
     configs += ['simple-atomic', 'simple-timing', 'o3-timing', 'memtest',
                 'simple-atomic-mp', 'simple-timing-mp', 'o3-timing-mp',
-                'inorder-timing']
+                'inorder-timing', 'rubytest']
 
 if env['RUBY']:
-    # Hack for Ruby
-    configs += [c + '-ruby' for c in configs]
+    # With Ruby, A protocol must be specified in the environment
+    assert(env['PROTOCOL'])
+
+    #
+    # Is there a way to determine what is Protocol EnumVariable
+    # default and eliminate the need to hard code the default protocol below?
+    #
+    # If the binary includes the default ruby protocol, run both ruby and
+    # non-ruby versions of the tests.  Otherwise just run the ruby versions.
+    #
+    if env['PROTOCOL'] == 'MI_example':
+        configs += [c + "-ruby" for c in configs]
+    else:
+        configs = [c + "-ruby-" + env['PROTOCOL'] for c in configs]
 
 cwd = os.getcwd()
 os.chdir(str(Dir('.').srcdir))