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/*
* Copyright (c) 2011-2012,2015,2017 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.
*/
#ifndef __MEM_GEM5_PROTOCOL_FUNCTIONAL_HH__
#define __MEM_GEM5_PROTOCOL_FUNCTIONAL_HH__
#include "mem/backdoor.hh"
#include "mem/packet.hh"
namespace gem5
{
class FunctionalResponseProtocol;
class FunctionalRequestProtocol
{
friend class FunctionalResponseProtocol;
protected:
/**
* Send a functional request packet, where the data is instantly
* updated everywhere in the memory system, without affecting the
* current state of any block or moving the block.
*
* @param pkt Packet to send.
*/
void send(FunctionalResponseProtocol *peer, PacketPtr pkt) const;
/**
* Receive a functional snoop request packet from the peer.
*/
virtual void recvFunctionalSnoop(PacketPtr pkt) = 0;
/**
* Send a request for a back door to a range of memory.
*
* @param req An object which describes what back door is being requested.
* @param backdoor Can be set to a back door pointer by the target to let
* caller have direct access to the requested range.
*/
void sendMemBackdoorReq(FunctionalResponseProtocol *peer,
const MemBackdoorReq &req, MemBackdoorPtr &backdoor);
};
class FunctionalResponseProtocol
{
friend class FunctionalRequestProtocol;
protected:
/**
* Send a functional snoop request packet, where the data is
* instantly updated everywhere in the memory system, without
* affecting the current state of any block or moving the block.
*
* @param pkt Snoop packet to send.
*/
void sendSnoop(FunctionalRequestProtocol *peer, PacketPtr pkt) const;
/**
* Receive a functional request packet from the peer.
*/
virtual void recvFunctional(PacketPtr pkt) = 0;
/**
* Receive a request for a back door to a range of memory.
*
* @param req An object which describes what back door is being requested.
* @param backdoor Can be set to a back door pointer by the target to let
* caller have direct access to the requested range.
*/
virtual void recvMemBackdoorReq(const MemBackdoorReq &req,
MemBackdoorPtr &backdoor) = 0;
};
} // namespace gem5
#endif //__MEM_GEM5_PROTOCOL_FUNCTIONAL_HH__