sensitivity.cc revision 13206:c944ef4abb48 
1/*
2 * Copyright 2018 Google, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met: redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer;
8 * redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution;
11 * neither the name of the copyright holders nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Authors: Gabe Black
28 */
29
30#include "systemc/core/sensitivity.hh"
31
32#include "systemc/core/event.hh"
33#include "systemc/core/scheduler.hh"
34#include "systemc/ext/core/sc_export.hh"
35#include "systemc/ext/core/sc_interface.hh"
36#include "systemc/ext/core/sc_port.hh"
37
38namespace sc_gem5
39{
40
41void
42Sensitivity::satisfy()
43{
44    process->satisfySensitivity(this);
45}
46
47bool
48Sensitivity::notify(Event *e)
49{
50    if (process->disabled())
51        return false;
52    return notifyWork(e);
53}
54
55
56void
57DynamicSensitivity::addToEvent(const ::sc_core::sc_event *e)
58{
59    Event::getFromScEvent(e)->addSensitivity(this);
60}
61
62void
63DynamicSensitivity::delFromEvent(const ::sc_core::sc_event *e)
64{
65    Event::getFromScEvent(e)->delSensitivity(this);
66}
67
68void
69StaticSensitivity::addToEvent(const ::sc_core::sc_event *e)
70{
71    Event::getFromScEvent(e)->addSensitivity(this);
72}
73
74void
75StaticSensitivity::delFromEvent(const ::sc_core::sc_event *e)
76{
77    Event::getFromScEvent(e)->delSensitivity(this);
78}
79
80void
81StaticSensitivityInterface::finalize()
82{
83    event = &interface->default_event();
84    SensitivityEvent::finalize();
85}
86
87void
88StaticSensitivityPort::finalize()
89{
90    for (int i = 0; i < port->size(); i++) {
91        const ::sc_core::sc_event *event =
92            &port->_gem5Interface(i)->default_event();
93        events.insert(event);
94        addToEvent(event);
95    }
96}
97
98void
99StaticSensitivityExport::finalize()
100{
101    event = &exp->get_interface()->default_event();
102    SensitivityEvent::finalize();
103}
104
105void
106StaticSensitivityFinder::finalize()
107{
108    const ::sc_core::sc_port_base *port = finder->port();
109    int size = port->size();
110    for (int i = 0; i < size; i++) {
111        ::sc_core::sc_interface *interface = port->_gem5Interface(i);
112        const ::sc_core::sc_event *event = &finder->find_event(interface);
113        events.insert(event);
114        addToEvent(event);
115    }
116}
117
118bool
119DynamicSensitivityEventOrList::notifyWork(Event *e)
120{
121    events.erase(e->sc_event());
122
123    // All the other events need this deleted from their lists since this
124    // sensitivity has been satisfied without them triggering.
125    for (auto le: events)
126        delFromEvent(le);
127
128    satisfy();
129    return true;
130}
131
132DynamicSensitivityEventOrList::DynamicSensitivityEventOrList(
133        Process *p, const sc_core::sc_event_or_list *eol) :
134    Sensitivity(p), DynamicSensitivity(p), events(eol->events)
135{}
136
137void
138DynamicSensitivityEventOrList::finalize()
139{
140    for (auto e: events)
141        addToEvent(e);
142}
143
144void
145DynamicSensitivityEventOrList::clear()
146{
147    for (auto e: events)
148        delFromEvent(e);
149}
150
151bool
152DynamicSensitivityEventAndList::notifyWork(Event *e)
153{
154    events.erase(e->sc_event());
155
156    // This sensitivity is satisfied if all events have triggered.
157    if (events.empty())
158        satisfy();
159
160    return true;
161}
162
163DynamicSensitivityEventAndList::DynamicSensitivityEventAndList(
164        Process *p, const sc_core::sc_event_and_list *eal) :
165    Sensitivity(p), DynamicSensitivity(p), events(eal->events)
166{}
167
168void
169DynamicSensitivityEventAndList::finalize()
170{
171    for (auto e: events)
172        addToEvent(e);
173}
174
175void
176DynamicSensitivityEventAndList::clear()
177{
178    for (auto e: events)
179        delFromEvent(e);
180}
181
182} // namespace sc_gem5
183