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/*
* Copyright (c) 2012,2015,2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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.
*
* Authors: Steve Reinhardt
* Andreas Hansson
* William Wang
*/
/**
* @file
* Port object definitions.
*/
#include "mem/port.hh"
#include "base/trace.hh"
#include "sim/sim_object.hh"
BaseMasterPort::BaseMasterPort(const std::string &name, PortID _id)
: Port(name, _id), _baseSlavePort(NULL)
{
}
BaseMasterPort::~BaseMasterPort()
{
}
BaseSlavePort&
BaseMasterPort::getSlavePort() const
{
if (_baseSlavePort == NULL)
panic("Cannot getSlavePort on master port %s that is not connected\n",
name());
return *_baseSlavePort;
}
BaseSlavePort::BaseSlavePort(const std::string &name, PortID _id)
: Port(name, _id), _baseMasterPort(NULL)
{
}
BaseSlavePort::~BaseSlavePort()
{
}
BaseMasterPort&
BaseSlavePort::getMasterPort() const
{
if (_baseMasterPort == NULL)
panic("Cannot getMasterPort on slave port %s that is not connected\n",
name());
return *_baseMasterPort;
}
/**
* Master port
*/
MasterPort::MasterPort(const std::string& name, SimObject* _owner, PortID _id)
: BaseMasterPort(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());
}
// bind on the level of the base ports
_baseSlavePort = slave_port;
// master port keeps track of the slave port
_slavePort = slave_port;
_connected = true;
// 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 = NULL;
_connected = false;
_baseSlavePort = NULL;
}
AddrRangeList
MasterPort::getAddrRanges() const
{
return _slavePort->getAddrRanges();
}
Tick
MasterPort::sendAtomic(PacketPtr pkt)
{
assert(pkt->isRequest());
return _slavePort->recvAtomic(pkt);
}
Tick
MasterPort::sendAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor)
{
assert(pkt->isRequest());
return _slavePort->recvAtomicBackdoor(pkt, backdoor);
}
void
MasterPort::sendFunctional(PacketPtr pkt)
{
assert(pkt->isRequest());
return _slavePort->recvFunctional(pkt);
}
bool
MasterPort::sendTimingReq(PacketPtr pkt)
{
assert(pkt->isRequest());
return _slavePort->recvTimingReq(pkt);
}
bool
MasterPort::tryTiming(PacketPtr pkt) const
{
assert(pkt->isRequest());
return _slavePort->tryTiming(pkt);
}
bool
MasterPort::sendTimingSnoopResp(PacketPtr pkt)
{
assert(pkt->isResponse());
return _slavePort->recvTimingSnoopResp(pkt);
}
void
MasterPort::sendRetryResp()
{
_slavePort->recvRespRetry();
}
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);
}
/**
* Slave port
*/
SlavePort::SlavePort(const std::string& name, SimObject* _owner, PortID id)
: BaseSlavePort(name, id), _masterPort(NULL), defaultBackdoorWarned(false),
owner(*_owner)
{
}
SlavePort::~SlavePort()
{
}
void
SlavePort::slaveUnbind()
{
_baseMasterPort = NULL;
_masterPort = NULL;
_connected = false;
}
void
SlavePort::slaveBind(MasterPort& master_port)
{
_baseMasterPort = &master_port;
_masterPort = &master_port;
_connected = true;
}
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);
}
Tick
SlavePort::sendAtomicSnoop(PacketPtr pkt)
{
assert(pkt->isRequest());
return _masterPort->recvAtomicSnoop(pkt);
}
void
SlavePort::sendFunctionalSnoop(PacketPtr pkt)
{
assert(pkt->isRequest());
return _masterPort->recvFunctionalSnoop(pkt);
}
bool
SlavePort::sendTimingResp(PacketPtr pkt)
{
assert(pkt->isResponse());
return _masterPort->recvTimingResp(pkt);
}
void
SlavePort::sendTimingSnoopReq(PacketPtr pkt)
{
assert(pkt->isRequest());
_masterPort->recvTimingSnoopReq(pkt);
}
void
SlavePort::sendRetryReq()
{
_masterPort->recvReqRetry();
}
void
SlavePort::sendRetrySnoopResp()
{
_masterPort->recvRetrySnoopResp();
}