* * *

mem: support for gpu-style RMWs in ruby

This patch adds support for GPU-style read-modify-write (RMW) operations in
ruby. Such atomic operations are traditionally executed at the memory controller
(instead of through an L1 cache using cache-line locking).

Currently, this patch works by propogating operation functors through the memory
system.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mem/packet.hh b/src/mem/packet.hh
index 0e7135d73..19c7e6397 100644
--- a/src/mem/packet.hh
+++ b/src/mem/packet.hh
@@ -661,6 +661,12 @@ class Packet : public Printable
     }
 
     /**
+     * Accessor function to atomic op.
+     */
+    AtomicOpFunctor *getAtomicOp() const { return req->getAtomicOpFunctor(); }
+    bool isAtomicOp() const { return req->isAtomic(); }
+
+    /**
      * It has been determined that the SC packet should successfully update
      * memory. Therefore, convert this SC packet to a normal write.
      */