From d658b6e1cc22de852fef611e28f448257acc298a Mon Sep 17 00:00:00 2001
From: Tony Gutierrez <anthony.gutierrez@amd.com>
Date: Tue, 19 Jan 2016 13:57:50 -0500
Subject: * * * 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.
---
 src/mem/packet.hh | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/mem/packet.hh')

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
@@ -660,6 +660,12 @@ class Packet : public Printable
         return _isSecure;
     }
 
+    /**
+     * 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.
-- 
cgit v1.2.3