O3, Ruby: Forward invalidations from Ruby to O3 CPU

This patch implements the functionality for forwarding invalidations and
replacements from the L1 cache of the Ruby memory system to the O3 CPU. The
implementation adds a list of ports to RubyPort. Whenever a replacement or an
invalidation is performed, the L1 cache forwards this to all the ports, which
is the LSQ in case of the O3 CPU.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mem/ruby/system/RubyPort.cc b/src/mem/ruby/system/RubyPort.cc
index ce9973402..b60ca2a07 100644
--- a/src/mem/ruby/system/RubyPort.cc
+++ b/src/mem/ruby/system/RubyPort.cc
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2009 Advanced Micro Devices, Inc.
+ * Copyright (c) 2011 Mark D. Hill and David A. Wood
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -682,3 +683,14 @@ RubyPort::M5Port::deviceBlockSize() const
 {
     return (unsigned) RubySystem::getBlockSizeBytes();
 }
+
+void
+RubyPort::ruby_eviction_callback(const Address& address)
+{
+    DPRINTF(RubyPort, "Sending invalidations.\n");
+    Request req(address.getAddress(), 0, 0);
+    for (CpuPortIter it = cpu_ports.begin(); it != cpu_ports.end(); it++) {
+        Packet *pkt = new Packet(&req, MemCmd::InvalidationReq, -1);
+        (*it)->sendTiming(pkt);
+    }
+}