* * *

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, 1 insertions, 0 deletions

diff --git a/src/mem/protocol/RubySlicc_Types.sm b/src/mem/protocol/RubySlicc_Types.sm
index c7479089b..95fa1db17 100644
--- a/src/mem/protocol/RubySlicc_Types.sm
+++ b/src/mem/protocol/RubySlicc_Types.sm
@@ -126,6 +126,7 @@ structure(RubyRequest, desc="...", interface="Message", external="yes") {
   int Size,                  desc="size in bytes of access";
   PrefetchBit Prefetch,      desc="Is this a prefetch request";
   int contextId,             desc="this goes away but must be replace with Nilay";
+  int wfid,                  desc="Writethrough wavefront";
   HSAScope scope,            desc="HSA scope";
   HSASegment segment,        desc="HSA segment";
 }