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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 "base/trace.hh"
#include "mem/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;
}
i++;
}
if (dest_id == -1)
panic("Unable to find destination for addr: %llx", addr);
// 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.");
assert(id < interfaces.size() && id >= 0);
Port *port = interfaces[id];
AddrRangeList ranges;
AddrRangeList snoops;
port->getPeerAddressRanges(ranges, snoops);
// not dealing with snooping yet either
assert(snoops.size() == 0);
// or multiple ranges
assert(ranges.size() == 1);
DevMap dm;
dm.portId = id;
dm.range = ranges.front();
DPRINTF(MMU, "Adding range %llx - %llx for id %d\n", dm.range.start,
dm.range.end, id);
portList.push_back(dm);
DPRINTF(MMU, "port list has %d entries\n", portList.size());
}
void
Bus::BusPort::addressRanges(AddrRangeList &resp, AddrRangeList &snoop)
{
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)
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