1 files changed, 148 insertions, 0 deletions
diff --git a/dev/etherlink.cc b/dev/etherlink.cc
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+++ b/dev/etherlink.cc
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+/*
+ * 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
+ */
+
+#include <deque>
+#include <string>
+#include <vector>
+
+#include <math.h>
+
+#include "etherlink.hh"
+#include "etherdump.hh"
+#include "etherint.hh"
+#include "etherpkt.hh"
+#include "trace.hh"
+#include "universe.hh"
+
+using namespace std;
+
+EtherLink::EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
+                     Tick speed, EtherDump *dump)
+    : SimObject(name)
+{
+    double rate = ((double)ticksPerSecond * 8.0) / (double)speed;
+
+    link1 = new Link(name + ".link1", rate, dump);
+    link2 = new Link(name + ".link2", rate, dump);
+
+    int1 = new Interface(name + ".int1", link1, link2);
+    int2 = new Interface(name + ".int2", link2, link1);
+
+    int1->setPeer(i1);
+    i1->setPeer(int1);
+    int2->setPeer(i2);
+    i2->setPeer(int2);
+}
+
+EtherLink::~EtherLink()
+{
+    delete link1;
+    delete link2;
+
+    delete int1;
+    delete int2;
+}
+
+EtherLink::Interface::Interface(const std::string &name, Link *tx, Link *rx)
+    : EtherInt(name), txlink(tx)
+{
+    tx->setTxInt(this);
+    rx->setRxInt(this);
+}
+
+EtherLink::Link::Link(const std::string &name, double rate, EtherDump *d)
+    : Serializeable(name), txint(NULL), rxint(NULL), ticks_per_byte(rate),
+      dump(d), event(&mainEventQueue, this)
+{}
+
+void
+EtherLink::Link::txDone()
+{
+    rxint->sendPacket(packet);
+
+    if (dump)
+        dump->dump(packet);
+
+    DPRINTF(Ethernet, "EtherLink packet received: len=%d\n", packet->length);
+    DDUMP(EthernetData, packet->data, packet->length);
+
+    packet = 0;
+    assert(!busy());
+
+    txint->sendDone();
+}
+
+bool
+EtherLink::Link::transmit(PacketPtr pkt)
+{
+    if (busy()) {
+        DPRINTF(Ethernet, "EtherLink packet not sent, link busy\n");
+        return false;
+    }
+
+    DPRINTF(Ethernet, "EtherLink packet sent: len=%d\n", pkt->length);
+    DDUMP(EthernetData, pkt->data, pkt->length);
+
+    packet = pkt;
+    int delay = (int)ceil(((double)pkt->length * ticks_per_byte) + 1.0);
+    DPRINTF(Ethernet, "EtherLink scheduling packet: delay=%d, (rate=%f)\n",
+            delay, ticks_per_byte);
+    event.schedule(curTick + delay);
+
+    return true;
+}
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
+
+    SimObjectParam<EtherInt *> interface1;
+    SimObjectParam<EtherInt *> interface2;
+    Param<int> link_speed;
+    SimObjectParam<EtherDump *> packet_dump;
+
+END_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink)
+
+    INIT_PARAM(interface1, "interface 1"),
+    INIT_PARAM(interface2, "interface 2"),
+    INIT_PARAM_DFLT(link_speed, "link speed in bits per second", 100000000),
+    INIT_PARAM_DFLT(packet_dump, "object to dump network packets to", NULL)
+
+END_INIT_SIM_OBJECT_PARAMS(EtherLink)
+
+CREATE_SIM_OBJECT(EtherLink)
+{
+    return new EtherLink(getInstanceName(), interface1, interface2, link_speed,
+                         packet_dump);
+}
+
+REGISTER_SIM_OBJECT("EtherLink", EtherLink)