ruby: initialize replacement policies with their own simobjs

this is in preparation for other replacement policies that take additional
parameters.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/mem/ruby/structures/LRUPolicy.cc b/src/mem/ruby/structures/LRUPolicy.cc
new file mode 100644
index 000000000..a1e3b277e
--- /dev/null
+++ b/src/mem/ruby/structures/LRUPolicy.cc
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013 Advanced Micro Devices, Inc
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Derek Hower
+ */
+
+#include "mem/ruby/structures/LRUPolicy.hh"
+
+
+
+LRUPolicy::LRUPolicy(const Params * p)
+    : AbstractReplacementPolicy(p)
+{
+}
+
+
+LRUPolicy::~LRUPolicy()
+{
+}
+
+LRUPolicy *
+LRUReplacementPolicyParams::create()
+{
+    return new LRUPolicy(this);
+}
+
+
+void
+LRUPolicy::touch(int64 set, int64 index, Tick time)
+{
+    assert(index >= 0 && index < m_assoc);
+    assert(set >= 0 && set < m_num_sets);
+
+    m_last_ref_ptr[set][index] = time;
+}
+
+int64
+LRUPolicy::getVictim(int64 set) const
+{
+    Tick time, smallest_time;
+    int64 smallest_index;
+
+    smallest_index = 0;
+    smallest_time = m_last_ref_ptr[set][0];
+
+    for (unsigned i = 0; i < m_assoc; i++) {
+        time = m_last_ref_ptr[set][i];
+
+        if (time < smallest_time) {
+            smallest_index = i;
+            smallest_time = time;
+        }
+    }
+
+    return smallest_index;
+}