tport.cc revision 11190
12914Ssaidi@eecs.umich.edu/*
28856Sandreas.hansson@arm.com * Copyright (c) 2012 ARM Limited
38856Sandreas.hansson@arm.com * All rights reserved.
48856Sandreas.hansson@arm.com *
58856Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall
68856Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual
78856Sandreas.hansson@arm.com * property including but not limited to intellectual property relating
88856Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software
98856Sandreas.hansson@arm.com * licensed hereunder.  You may use the software subject to the license
108856Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated
118856Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software,
128856Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form.
138856Sandreas.hansson@arm.com *
142914Ssaidi@eecs.umich.edu * Copyright (c) 2006 The Regents of The University of Michigan
152914Ssaidi@eecs.umich.edu * All rights reserved.
162914Ssaidi@eecs.umich.edu *
172914Ssaidi@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
182914Ssaidi@eecs.umich.edu * modification, are permitted provided that the following conditions are
192914Ssaidi@eecs.umich.edu * met: redistributions of source code must retain the above copyright
202914Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer;
212914Ssaidi@eecs.umich.edu * redistributions in binary form must reproduce the above copyright
222914Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the
232914Ssaidi@eecs.umich.edu * documentation and/or other materials provided with the distribution;
242914Ssaidi@eecs.umich.edu * neither the name of the copyright holders nor the names of its
252914Ssaidi@eecs.umich.edu * contributors may be used to endorse or promote products derived from
262914Ssaidi@eecs.umich.edu * this software without specific prior written permission.
272914Ssaidi@eecs.umich.edu *
282914Ssaidi@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
292914Ssaidi@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
302914Ssaidi@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
312914Ssaidi@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
322914Ssaidi@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
332914Ssaidi@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
342914Ssaidi@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
352914Ssaidi@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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372914Ssaidi@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
382914Ssaidi@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
392914Ssaidi@eecs.umich.edu *
402914Ssaidi@eecs.umich.edu * Authors: Ali Saidi
418856Sandreas.hansson@arm.com *          Andreas Hansson
422914Ssaidi@eecs.umich.edu */
432914Ssaidi@eecs.umich.edu
448708Sandreas.hansson@arm.com#include "mem/mem_object.hh"
452914Ssaidi@eecs.umich.edu#include "mem/tport.hh"
462914Ssaidi@eecs.umich.edu
478914Sandreas.hansson@arm.comSimpleTimingPort::SimpleTimingPort(const std::string& _name,
488914Sandreas.hansson@arm.com                                   MemObject* _owner) :
499097Sandreas.hansson@arm.com    QueuedSlavePort(_name, _owner, queueImpl), queueImpl(*_owner, *this)
505740Snate@binkert.org{
515740Snate@binkert.org}
525740Snate@binkert.org
534490Sstever@eecs.umich.eduvoid
544490Sstever@eecs.umich.eduSimpleTimingPort::recvFunctional(PacketPtr pkt)
554490Sstever@eecs.umich.edu{
5610713Sandreas.hansson@arm.com    if (!respQueue.checkFunctional(pkt)) {
578914Sandreas.hansson@arm.com        // do an atomic access and throw away the returned latency
583296Ssaidi@eecs.umich.edu        recvAtomic(pkt);
594929Sstever@gmail.com    }
603091Sstever@eecs.umich.edu}
613091Sstever@eecs.umich.edu
623091Sstever@eecs.umich.edubool
638975Sandreas.hansson@arm.comSimpleTimingPort::recvTimingReq(PacketPtr pkt)
643091Sstever@eecs.umich.edu{
659662Sandreas.hansson@arm.com    // the SimpleTimingPort should not be used anywhere where there is
669662Sandreas.hansson@arm.com    // a need to deal with inhibited packets
679662Sandreas.hansson@arm.com    if (pkt->memInhibitAsserted())
689662Sandreas.hansson@arm.com        panic("SimpleTimingPort should never see an inhibited request\n");
694670Sstever@eecs.umich.edu
704626Sstever@eecs.umich.edu    bool needsResponse = pkt->needsResponse();
713091Sstever@eecs.umich.edu    Tick latency = recvAtomic(pkt);
723175Srdreslin@umich.edu    // turn packet around to go back to requester if response expected
734626Sstever@eecs.umich.edu    if (needsResponse) {
744670Sstever@eecs.umich.edu        // recvAtomic() should already have turned packet into
754670Sstever@eecs.umich.edu        // atomic response
764626Sstever@eecs.umich.edu        assert(pkt->isResponse());
779163Sandreas.hansson@arm.com        schedTimingResp(pkt, curTick() + latency);
784626Sstever@eecs.umich.edu    } else {
7911190Sandreas.hansson@arm.com        // queue the packet for deletion
8011190Sandreas.hansson@arm.com        pendingDelete.reset(pkt);
813309Srdreslin@umich.edu    }
824670Sstever@eecs.umich.edu
833091Sstever@eecs.umich.edu    return true;
843091Sstever@eecs.umich.edu}
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