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author | Gabe Black <gblack@eecs.umich.edu> | 2008-10-12 12:08:51 -0700 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2008-10-12 12:08:51 -0700 |
commit | e4590131825d27293d9642d2ac118ff03cc894f4 (patch) | |
tree | bb3523a68f0b9d3aacad411e58838ba87109e23d /src/mem/mport.hh | |
parent | e0f137a87c21eca5faa35cf0b9b529c4243d3ff3 (diff) | |
download | gem5-e4590131825d27293d9642d2ac118ff03cc894f4.tar.xz |
Create a message port for sending messages as apposed to reading/writing a memory range.
Diffstat (limited to 'src/mem/mport.hh')
-rw-r--r-- | src/mem/mport.hh | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/mem/mport.hh b/src/mem/mport.hh new file mode 100644 index 000000000..5975f89f0 --- /dev/null +++ b/src/mem/mport.hh @@ -0,0 +1,80 @@ +/* + * 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/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 MessagePort : public SimpleTimingPort +{ + public: + MessagePort(std::string pname, MemObject *_owner = NULL) : + SimpleTimingPort(pname, _owner) + {} + + virtual ~MessagePort() + {} + + void + recvFunctional(PacketPtr pkt) + { + recvAtomic(pkt); + } + + Tick recvAtomic(PacketPtr pkt); + + virtual Tick recvMessage(PacketPtr pkt) = 0; + + // Accept and ignore responses. + virtual Tick recvResponse(PacketPtr pkt) + { + return 0; + } + + // Since by default we're assuming everything we send is accepted, panic. + virtual Tick recvNack(PacketPtr pkt) + { + panic("Unhandled message nack.\n"); + } + + void sendMessageTiming(PacketPtr pkt, Tick latency); + Tick sendMessageAtomic(PacketPtr pkt); +}; + +#endif |