From dbe8892b761067c5c1e828f889a513ea085b044f Mon Sep 17 00:00:00 2001
From: Tushar Krishna <tushar@ece.gatech.edu>
Date: Thu, 6 Oct 2016 14:35:22 -0400
Subject: ruby: garnet2.0 Revamped version of garnet with more optimized
 single-cycle routers, more configurability, and cleaner code.

---
 src/mem/ruby/network/garnet2.0/flitBuffer.cc | 93 ++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 src/mem/ruby/network/garnet2.0/flitBuffer.cc

(limited to 'src/mem/ruby/network/garnet2.0/flitBuffer.cc')

diff --git a/src/mem/ruby/network/garnet2.0/flitBuffer.cc b/src/mem/ruby/network/garnet2.0/flitBuffer.cc
new file mode 100644
index 000000000..1a089936e
--- /dev/null
+++ b/src/mem/ruby/network/garnet2.0/flitBuffer.cc
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2008 Princeton University
+ * Copyright (c) 2016 Georgia Institute of Technology
+ * 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.
+ *
+ * Authors: Niket Agarwal
+ *          Tushar Krishna
+ */
+
+
+#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
+
+flitBuffer::flitBuffer()
+{
+    max_size = INFINITE_;
+}
+
+flitBuffer::flitBuffer(int maximum_size)
+{
+    max_size = maximum_size;
+}
+
+bool
+flitBuffer::isEmpty()
+{
+    return (m_buffer.size() == 0);
+}
+
+bool
+flitBuffer::isReady(Cycles curTime)
+{
+    if (m_buffer.size() != 0 ) {
+        flit *t_flit = peekTopFlit();
+        if (t_flit->get_time() <= curTime)
+            return true;
+    }
+    return false;
+}
+
+void
+flitBuffer::print(std::ostream& out) const
+{
+    out << "[flitBuffer: " << m_buffer.size() << "] " << std::endl;
+}
+
+bool
+flitBuffer::isFull()
+{
+    return (m_buffer.size() >= max_size);
+}
+
+void
+flitBuffer::setMaxSize(int maximum)
+{
+    max_size = maximum;
+}
+
+uint32_t
+flitBuffer::functionalWrite(Packet *pkt)
+{
+    uint32_t num_functional_writes = 0;
+
+    for (unsigned int i = 0; i < m_buffer.size(); ++i) {
+        if (m_buffer[i]->functionalWrite(pkt)) {
+            num_functional_writes++;
+        }
+    }
+
+    return num_functional_writes;
+}
-- 
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