1/*
2 * Copyright (c) 2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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29 * Nathan Binkert
30 */
31
32#include "base/trace.hh"
33#include "dev/io_device.hh"
34#include "sim/builder.hh"
35
36
37PioPort::PioPort(PioDevice *dev, Platform *p)
38 : Port(dev->name() + "-pioport"), device(dev), platform(p)
39{ }
40
41
42Tick
43PioPort::recvAtomic(Packet *pkt)
44{
45 return device->recvAtomic(pkt);
46}

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74PioPort::SendEvent::process()
75{
76 if (port->Port::sendTiming(packet))
77 return;
78
79 port->transmitList.push_back(packet);
80}
81
82
83
84bool
85PioPort::recvTiming(Packet *pkt)
86{
87 if (pkt->result == Packet::Nacked) {
88 pkt->reinitNacked();
89 if (transmitList.size()) {
90 transmitList.push_front(pkt);
91 } else {
92 if (!Port::sendTiming(pkt))
93 transmitList.push_front(pkt);
94 }
95 } else {
96 Tick latency = device->recvAtomic(pkt);
97 // turn packet around to go back to requester
98 pkt->makeTimingResponse();
99 sendTiming(pkt, latency);
100 }
101 return true;
102}

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