1 files changed, 127 insertions, 0 deletions
diff --git a/mem/bus.cc b/mem/bus.cc
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+++ b/mem/bus.cc
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+/*
+ * Copyright (c) 2006 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 Definition of a bus object.
+ */
+
+
+#include "bus.hh"
+#include "sim/builder.hh"
+
+/** Function called by the port when the bus is recieving a Timing
+ * transaction.*/
+bool
+Bus::recvTiming(Packet &pkt, int id)
+{
+
+    panic("I need to be implemented, but not right now.");
+}
+
+Port *
+Bus::findPort(Addr addr, int id)
+{
+    /* An interval tree would be a better way to do this. --ali. */
+    int dest_id = -1;
+    int i = 0;
+    bool found = false;
+
+    while (i < portList.size() && !found)
+    {
+        if (portList[i].range == addr) {
+            dest_id = portList[i].portId;
+            found = true;
+        }
+    }
+    assert(dest_id != -1 && "Unable to find destination");
+    // we shouldn't be sending this back to where it came from
+    assert(dest_id != id);
+
+    return interfaces[dest_id];
+}
+
+/** Function called by the port when the bus is recieving a Atomic
+ * transaction.*/
+Tick
+Bus::recvAtomic(Packet &pkt, int id)
+{
+    return findPort(pkt.addr, id)->sendAtomic(pkt);
+}
+
+/** Function called by the port when the bus is recieving a Functional
+ * transaction.*/
+void
+Bus::recvFunctional(Packet &pkt, int id)
+{
+    findPort(pkt.addr, id)->sendFunctional(pkt);
+}
+
+/** Function called by the port when the bus is recieving a status change.*/
+void
+Bus::recvStatusChange(Port::Status status, int id)
+{
+    assert(status == Port:: RangeChange &&
+           "The other statuses need to be implemented.");
+    Port *port = interfaces[id];
+    AddrRangeList ranges;
+    bool owner;
+
+    port->getPeerAddressRanges(ranges, owner);
+    // not dealing with snooping yet either
+    assert(owner == true);
+    // or multiple ranges
+    assert(ranges.size() == 1);
+    DevMap dm;
+    dm.portId = id;
+    dm.range = ranges.front();
+
+    portList.push_back(dm);
+}
+
+void
+Bus::BusPort::addressRanges(AddrRangeList &range_list, bool &owner)
+{
+    panic("I'm not implemented.\n");
+}
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(Bus)
+
+    Param<int> bus_id;
+
+END_DECLARE_SIM_OBJECT_PARAMS(Bus)
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(Bus)
+    INIT_PARAM(bus_id, "junk bus id")
+END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
+
+CREATE_SIM_OBJECT(Bus)
+{
+    return new Bus(getInstanceName());
+}
+
+REGISTER_SIM_OBJECT("Bus", Bus)