52f90890a3
This patch adds the PortID to the QueuedMasterPort. This allows a PortID to be specified as it previously was set to the detault value of -1.
156 lines
5.6 KiB
C++
156 lines
5.6 KiB
C++
/*
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* Copyright (c) 2012 ARM Limited
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Andreas Hansson
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*/
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#ifndef __MEM_QPORT_HH__
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#define __MEM_QPORT_HH__
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/**
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* @file
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* Declaration of the queued port.
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*/
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#include "mem/packet_queue.hh"
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#include "mem/port.hh"
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/**
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* A queued port is a port that has an infinite queue for outgoing
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* packets and thus decouples the module that wants to send
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* request/responses from the flow control (retry mechanism) of the
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* port. A queued port can be used by both a master and a slave. The
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* queue is a parameter to allow tailoring of the queue implementation
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* (used in the cache).
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*/
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class QueuedSlavePort : public SlavePort
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{
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protected:
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/** Packet queue used to store outgoing requests and responses. */
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SlavePacketQueue &queue;
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/** This function is notification that the device should attempt to send a
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* packet again. */
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virtual void recvRetry() { queue.retry(); }
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public:
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/**
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* Create a QueuedPort with a given name, owner, and a supplied
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* implementation of a packet queue. The external definition of
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* the queue enables e.g. the cache to implement a specific queue
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* behaviuor in a subclass, and provide the latter to the
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* QueuePort constructor.
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*/
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QueuedSlavePort(const std::string& name, MemObject* owner,
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SlavePacketQueue &queue) :
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SlavePort(name, owner), queue(queue)
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{ }
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virtual ~QueuedSlavePort() { }
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/**
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* Schedule the sending of a timing response.
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*
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* @param pkt Packet to send
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* @param when Absolute time (in ticks) to send packet
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*/
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void schedTimingResp(PacketPtr pkt, Tick when)
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{ queue.schedSendTiming(pkt, when); }
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/** Check the list of buffered packets against the supplied
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* functional request. */
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bool checkFunctional(PacketPtr pkt) { return queue.checkFunctional(pkt); }
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unsigned int drain(DrainManager *dm) { return queue.drain(dm); }
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};
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class QueuedMasterPort : public MasterPort
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{
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protected:
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/** Packet queue used to store outgoing requests and responses. */
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MasterPacketQueue &queue;
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/** This function is notification that the device should attempt to send a
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* packet again. */
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virtual void recvRetry() { queue.retry(); }
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public:
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/**
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* Create a QueuedPort with a given name, owner, and a supplied
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* implementation of a packet queue. The external definition of
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* the queue enables e.g. the cache to implement a specific queue
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* behaviuor in a subclass, and provide the latter to the
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* QueuePort constructor.
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*/
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QueuedMasterPort(const std::string& name, MemObject* owner,
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MasterPacketQueue &queue, PortID id = InvalidPortID) :
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MasterPort(name, owner, id), queue(queue)
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{ }
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virtual ~QueuedMasterPort() { }
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/**
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* Schedule the sending of a timing request.
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*
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* @param pkt Packet to send
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* @param when Absolute time (in ticks) to send packet
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*/
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void schedTimingReq(PacketPtr pkt, Tick when)
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{ queue.schedSendTiming(pkt, when); }
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/**
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* Schedule the sending of a timing snoop response.
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*
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* @param pkt Packet to send
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* @param when Absolute time (in ticks) to send packet
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*/
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void schedTimingSnoopResp(PacketPtr pkt, Tick when)
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{ queue.schedSendTiming(pkt, when, true); }
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/** Check the list of buffered packets against the supplied
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* functional request. */
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bool checkFunctional(PacketPtr pkt) { return queue.checkFunctional(pkt); }
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unsigned int drain(DrainManager *dm) { return queue.drain(dm); }
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};
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#endif // __MEM_QPORT_HH__
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