ruby: replace global g_system_ptr with per-object pointers

This is another step in the process of removing global variables
from Ruby to enable multiple RubySystem instances in a single simulation.

With possibly multiple RubySystem objects, we can no longer use a global
variable to find "the" RubySystem object.  Instead, each Ruby component
has to carry a pointer to the RubySystem object to which it belongs.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mem/ruby/structures/WireBuffer.hh b/src/mem/ruby/structures/WireBuffer.hh
index a724f1381..4282f524e 100644
--- a/src/mem/ruby/structures/WireBuffer.hh
+++ b/src/mem/ruby/structures/WireBuffer.hh
@@ -94,6 +94,8 @@ class WireBuffer : public SimObject
     // queues where memory requests live
     std::vector<MsgPtr> m_message_queue;
 
+    RubySystem * m_ruby_system;
+
 };
 
 std::ostream& operator<<(std::ostream& out, const WireBuffer& obj);