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/*
* Copyright (c) 2012 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) 2008 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: Gabe Black
*/
#ifndef __MEM_MPORT_HH__
#define __MEM_MPORT_HH__
#include "mem/mem_object.hh"
#include "mem/tport.hh"
/*
* This file defines a port class which is used for sending and receiving
* messages. These messages are atomic units which don't interact and
* should be smaller than a cache block. This class is based on
* the underpinnings of SimpleTimingPort, but it tweaks some of the external
* functions.
*/
class MessageSlavePort : public SimpleTimingPort
{
public:
MessageSlavePort(const std::string &name, MemObject *owner) :
SimpleTimingPort(name, owner)
{}
virtual ~MessageSlavePort()
{}
protected:
Tick recvAtomic(PacketPtr pkt);
virtual Tick recvMessage(PacketPtr pkt) = 0;
};
class MessageMasterPort : public QueuedMasterPort
{
public:
MessageMasterPort(const std::string &name, MemObject *owner) :
QueuedMasterPort(name, owner, queue), queue(*owner, *this)
{}
virtual ~MessageMasterPort()
{}
bool recvTiming(PacketPtr pkt) { recvResponse(pkt); return true; }
protected:
/** A packet queue for outgoing packets. */
PacketQueue queue;
// Accept and ignore responses.
virtual Tick recvResponse(PacketPtr pkt)
{
return 0;
}
};
#endif
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