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+/*
+ * Copyright (c) 2002-2005 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 Decleration of a bus object.
+ */
+
+#ifndef __MEM_BUS_HH__
+#define __MEM_BUS_HH__
+
+#include <string>
+#include <list>
+#include <inttypes.h>
+
+#include "base/range.hh"
+#include "mem/mem_object.hh"
+#include "mem/packet.hh"
+
+class Bus : public MemObject
+{
+    /** Function called by the port when the bus is recieving a Timing
+        transaction.*/
+    SendResult recvTiming(Packet &pkt, int id);
+
+    /** Function called by the port when the bus is recieving a Atomic
+        transaction.*/
+    SendResult recvAtomic(Packet &pkt, int id);
+
+    /** Function called by the port when the bus is recieving a Functional
+        transaction.*/
+    SendResult recvFunctional(Packet &pkt, int id);
+
+    /** Function called by the port when the bus is recieving a status change.*/
+    void recvStatusChange(Port::Status status, int id);
+
+    /** Decleration of the buses port type, one will be instantiated for each
+        of the interfaces connecting to the bus. */
+    class BusPort : public Port
+    {
+        /** A pointer to the bus to which this port belongs. */
+        Bus *bus;
+
+        /** A id to keep track of the intercafe ID this port is connected to. */
+        int id;
+
+      public:
+
+        /** Constructor for the BusPort.*/
+        BusPort(Bus *_bus, int _id)
+            : bus(_bus), id(_id)
+        { }
+
+      protected:
+
+        /** When reciving a timing request from the peer port (at id),
+            pass it to the bus. */
+        virtual SendResult recvTiming(Packet &pkt)
+        { return bus->recvTiming(pkt, id); }
+
+        /** When reciving a Atomic requestfrom the peer port (at id),
+            pass it to the bus. */
+        virtual SendResult recvAtomic(Packet &pkt)
+        { return bus->recvAtomic(pkt, id); }
+
+        /** When reciving a Functional requestfrom the peer port (at id),
+            pass it to the bus. */
+        virtual SendResult recvFunctional(Packet &pkt)
+        { return bus->recvFunctional(pkt, id); }
+
+        /** When reciving a status changefrom the peer port (at id),
+            pass it to the bus. */
+        virtual void recvStatusChange(Status status)
+        { bus->recvStatusChange(status, id); }
+
+        // This should return all the 'owned' addresses that are
+        // downstream from this bus, yes?  That is, the union of all
+        // the 'owned' address ranges of all the other interfaces on
+        // this bus...
+        virtual void addressRanges(std::list<Range<Addr> > &range_list,
+                                   bool &owner);
+    };
+
+    /** A count of the number of interfaces connected to this bus. */
+    int num_interfaces;
+
+    /** An array of pointers to the peer port interfaces
+        connected to this bus.*/
+    Port *interfaces[];
+
+  public:
+
+    /** A function used to return the port associated with this bus object. */
+    virtual Port *getPort(const char *if_name)
+    {
+        // if_name ignored?  forced to be empty?
+        int id = num_interfaces++;
+        interfaces[id] = new BusPort(this, id);
+        return interfaces[id];
+    }
+};
+
+#endif //__MEM_BUS_HH__