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/VirtualChannel.hh | 101 +++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/mem/ruby/network/garnet2.0/VirtualChannel.hh

(limited to 'src/mem/ruby/network/garnet2.0/VirtualChannel.hh')

diff --git a/src/mem/ruby/network/garnet2.0/VirtualChannel.hh b/src/mem/ruby/network/garnet2.0/VirtualChannel.hh
new file mode 100644
index 000000000..d5f7687dc
--- /dev/null
+++ b/src/mem/ruby/network/garnet2.0/VirtualChannel.hh
@@ -0,0 +1,101 @@
+/*
+ * 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
+ */
+
+
+#ifndef __MEM_RUBY_NETWORK_GARNET_VIRTUAL_CHANNEL_HH__
+#define __MEM_RUBY_NETWORK_GARNET_VIRTUAL_CHANNEL_HH__
+
+#include <utility>
+
+#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
+#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
+
+class VirtualChannel
+{
+  public:
+    VirtualChannel(int id);
+    ~VirtualChannel();
+
+    bool need_stage(flit_stage stage, Cycles time);
+    void set_idle(Cycles curTime);
+    void set_active(Cycles curTime);
+    void set_outvc(int outvc)               { m_output_vc = outvc; }
+    inline int get_outvc()                  { return m_output_vc; }
+    void set_outport(int outport)           { m_output_port = outport; };
+    inline int get_outport()                  { return m_output_port; }
+
+    inline Cycles get_enqueue_time()          { return m_enqueue_time; }
+    inline void set_enqueue_time(Cycles time) { m_enqueue_time = time; }
+    inline VC_state_type get_state()        { return m_vc_state.first; }
+
+    inline bool isReady(Cycles curTime)
+    {
+        return m_input_buffer->isReady(curTime);
+    }
+
+    inline void
+    insertFlit(flit *t_flit)
+    {
+        m_input_buffer->insert(t_flit);
+    }
+
+    inline void
+    set_state(VC_state_type m_state, Cycles curTime)
+    {
+        m_vc_state.first = m_state;
+        m_vc_state.second = curTime;
+    }
+
+    inline flit*
+    peekTopFlit()
+    {
+        return m_input_buffer->peekTopFlit();
+    }
+
+    inline flit*
+    getTopFlit()
+    {
+        return m_input_buffer->getTopFlit();
+    }
+
+    uint32_t functionalWrite(Packet *pkt);
+
+  private:
+    int m_id;
+    flitBuffer *m_input_buffer;
+    std::pair<VC_state_type, Cycles> m_vc_state;
+    int m_output_port;
+    Cycles m_enqueue_time;
+    int m_output_vc;
+};
+
+#endif // __MEM_RUBY_NETWORK_GARNET_VIRTUAL_CHANNEL_HH__
-- 
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