sim_events.cc revision 11070 
1/*
2 * Copyright (c) 2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
15 * Copyright (c) 2013 Advanced Micro Devices, Inc.
16 * Copyright (c) 2013 Mark D. Hill and David A. Wood
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are
21 * met: redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer;
23 * redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution;
26 * neither the name of the copyright holders nor the names of its
27 * contributors may be used to endorse or promote products derived from
28 * this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 * Authors: Nathan Binkert
43 */
44
45#include <string>
46
47#include "base/callback.hh"
48#include "base/hostinfo.hh"
49#include "sim/eventq_impl.hh"
50#include "sim/sim_events.hh"
51#include "sim/sim_exit.hh"
52#include "sim/stats.hh"
53
54using namespace std;
55
56GlobalSimLoopExitEvent::GlobalSimLoopExitEvent(Tick when,
57                                               const std::string &_cause,
58                                               int c, Tick r)
59    : GlobalEvent(when, Sim_Exit_Pri, IsExitEvent),
60      cause(_cause), code(c), repeat(r)
61{
62}
63
64const char *
65GlobalSimLoopExitEvent::description() const
66{
67    return "global simulation loop exit";
68}
69
70//
71// handle termination event
72//
73void
74GlobalSimLoopExitEvent::process()
75{
76    if (repeat) {
77        schedule(curTick() + repeat);
78    }
79}
80
81void
82exitSimLoop(const std::string &message, int exit_code, Tick when, Tick repeat,
83            bool serialize)
84{
85    warn_if(serialize && (when != curTick() || repeat),
86            "exitSimLoop called with a delay and auto serialization. This is "
87            "currently unsupported.");
88
89    new GlobalSimLoopExitEvent(when + simQuantum, message, exit_code, repeat);
90}
91
92LocalSimLoopExitEvent::LocalSimLoopExitEvent(const std::string &_cause, int c,
93                                   Tick r)
94    : Event(Sim_Exit_Pri, IsExitEvent),
95      cause(_cause), code(c), repeat(r)
96{
97}
98
99//
100// handle termination event
101//
102void
103LocalSimLoopExitEvent::process()
104{
105    exitSimLoop(cause, 0);
106}
107
108
109const char *
110LocalSimLoopExitEvent::description() const
111{
112    return "simulation loop exit";
113}
114
115void
116LocalSimLoopExitEvent::serialize(CheckpointOut &cp) const
117{
118    Event::serialize(cp);
119
120    SERIALIZE_SCALAR(cause);
121    SERIALIZE_SCALAR(code);
122    SERIALIZE_SCALAR(repeat);
123}
124
125void
126LocalSimLoopExitEvent::unserialize(CheckpointIn &cp)
127{
128    Event::unserialize(cp);
129
130    UNSERIALIZE_SCALAR(cause);
131    UNSERIALIZE_SCALAR(code);
132    UNSERIALIZE_SCALAR(repeat);
133}
134
135//
136// constructor: automatically schedules at specified time
137//
138CountedExitEvent::CountedExitEvent(const std::string &_cause, int &counter)
139    : Event(Sim_Exit_Pri), cause(_cause), downCounter(counter)
140{
141    // catch stupid mistakes
142    assert(downCounter > 0);
143}
144
145
146//
147// handle termination event
148//
149void
150CountedExitEvent::process()
151{
152    if (--downCounter == 0) {
153        exitSimLoop(cause, 0);
154    }
155}
156
157
158const char *
159CountedExitEvent::description() const
160{
161    return "counted exit";
162}
163