port.cc

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 * Authors: Steve Reinhardt
 *          Andreas Hansson
 *          William Wang
 */

#include "mem/port.hh"

#include "base/trace.hh"
#include "sim/sim_object.hh"

MasterPort::MasterPort(const std::string& name, SimObject* _owner, PortID _id)
    : Port(name, _id), _slavePort(NULL), owner(*_owner)
{
}

MasterPort::~MasterPort()
{
}

void
MasterPort::bind(Port &peer)
{
    auto *slave_port = dynamic_cast<SlavePort *>(&peer);
    if (!slave_port) {
        fatal("Attempt to bind port %s to non-slave port %s.",
                name(), peer.name());
    }
    // master port keeps track of the slave port
    _slavePort = slave_port;
    Port::bind(peer);
    // slave port also keeps track of master port
    _slavePort->slaveBind(*this);
}

void
MasterPort::unbind()
{
    if (_slavePort == NULL)
        panic("Attempting to unbind master port %s that is not connected\n",
              name());
    _slavePort->slaveUnbind();
    _slavePort = nullptr;
    Port::unbind();
}

AddrRangeList
MasterPort::getAddrRanges() const
{
    return _slavePort->getAddrRanges();
}

void
MasterPort::printAddr(Addr a)
{
    auto req = std::make_shared<Request>(
        a, 1, 0, Request::funcMasterId);

    Packet pkt(req, MemCmd::PrintReq);
    Packet::PrintReqState prs(std::cerr);
    pkt.senderState = &prs;

    sendFunctional(&pkt);
}

SlavePort::SlavePort(const std::string& name, SimObject* _owner, PortID id)
    : Port(name, id), _masterPort(NULL), defaultBackdoorWarned(false),
    owner(*_owner)
{
}

SlavePort::~SlavePort()
{
}

void
SlavePort::slaveUnbind()
{
    _masterPort = NULL;
    Port::unbind();
}

void
SlavePort::slaveBind(MasterPort& master_port)
{
    _masterPort = &master_port;
    Port::bind(master_port);
}

Tick
SlavePort::recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor)
{
    if (!defaultBackdoorWarned) {
        warn("Port %s doesn't support requesting a back door.", name());
        defaultBackdoorWarned = true;
    }
    return recvAtomic(pkt);
}