1 files changed, 123 insertions, 0 deletions
diff --git a/dev/etherlink.hh b/dev/etherlink.hh
new file mode 100644
index 000000000..b88d80420
--- /dev/null
+++ b/dev/etherlink.hh
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2003 The Regents of The University of Michigan
+ * 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.
+ */
+
+/* @file
+ * Device module for modelling a fixed bandwidth full duplex ethernet link
+ */
+
+#ifndef __ETHERLINK_HH__
+#define __ETHERLINK_HH__
+
+#include "host.hh"
+#include "eventq.hh"
+#include "etherint.hh"
+#include "etherpkt.hh"
+#include "sim_object.hh"
+
+class EtherDump;
+
+/*
+ * Model for a fixed bandwidth full duplex ethernet link
+ */
+class EtherLink : public SimObject
+{
+  protected:
+    class Interface;
+
+     /*
+      * Model for a single uni-directional link
+      */
+    class Link : public Serializeable {
+      protected:
+        Interface *txint;
+        Interface *rxint;
+
+        double ticks_per_byte;
+        EtherDump *dump;
+
+      protected:
+        /*
+         * Transfer is complete
+         */
+        class DoneEvent : public Event
+        {
+          protected:
+            Link *link;
+
+          public:
+            DoneEvent(EventQueue *q, Link *l)
+                : Event(q), link(l) {}
+            virtual void process() { link->txDone(); }
+            virtual const char *description()
+                { return "ethernet link completion"; }
+        };
+
+        friend class DoneEvent;
+        DoneEvent event;
+        PacketPtr packet;
+
+        void txDone();
+
+      public:
+        Link(const std::string &name, double rate, EtherDump *dump);
+        ~Link() {}
+
+        bool busy() const { return (bool)packet; }
+        bool transmit(PacketPtr packet);
+
+        void setTxInt(Interface *i) { assert(!txint); txint = i; }
+        void setRxInt(Interface *i) { assert(!rxint); rxint = i; }
+    };
+
+    /*
+     * Interface at each end of the link
+     */
+    class Interface : public EtherInt
+    {
+      private:
+        Link *txlink;
+
+      public:
+        Interface(const std::string &name, Link *txlink, Link *rxlink);
+        bool recvPacket(PacketPtr packet) { return txlink->transmit(packet); }
+        void sendDone() { }
+    };
+
+    Link *link1;
+    Link *link2;
+
+    EtherInt *int1;
+    EtherInt *int2;
+
+  public:
+    EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
+              Tick speed, EtherDump *dump);
+    virtual ~EtherLink();
+};
+
+#endif // __ETHERLINK_HH__