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#ifndef __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_IN_IF_HH__
31#define __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_IN_IF_HH__
32
33#include "../core/sc_interface.hh"
34
35namespace sc_dt
36{
37
38class sc_logic;
39
40};
41
42namespace sc_gem5
43{
44
45class Reset;
46
47} // namespace sc_gem5
48
49namespace sc_core
50{
51
52class sc_event;
53
54template <class T>
55class sc_signal_in_if : virtual public sc_interface
56{
57  public:
58    virtual const T &read() const = 0;
59    virtual const sc_event &value_changed_event() const = 0;
60    virtual bool event() const = 0;
61
62  protected:
63    sc_signal_in_if() : sc_interface() {}
64
65  private:
66    // Disabled
67    sc_signal_in_if(const sc_signal_in_if<T> &) : sc_interface() {}
68    sc_signal_in_if<T> &
69    operator = (const sc_signal_in_if<T> &)
70    {
71        return *this;
72    }
73};
74
75template <>
76class sc_signal_in_if<bool> : virtual public sc_interface
77{
78  public:
79    virtual const bool &read() const = 0;
80
81    virtual const sc_event &value_changed_event() const = 0;
82    virtual const sc_event &posedge_event() const = 0;
83    virtual const sc_event &negedge_event() const = 0;
84
85    virtual bool event() const = 0;
86    virtual bool posedge() const = 0;
87    virtual bool negedge() const = 0;
88
89  protected:
90    sc_signal_in_if() : sc_interface() {}
91
92  private:
93    friend class sc_gem5::Reset;
94    virtual bool
95    _addReset(sc_gem5::Reset *reset) const
96    {
97        return false;
98    }
99
100    // Disabled
101    sc_signal_in_if(const sc_signal_in_if<bool> &) : sc_interface() {}
102    sc_signal_in_if<bool> &
103    operator = (const sc_signal_in_if<bool> &)
104    {
105        return *this;
106    }
107};
108
109template <>
110class sc_signal_in_if<sc_dt::sc_logic> : virtual public sc_interface
111{
112  public:
113    virtual const sc_dt::sc_logic &read() const = 0;
114
115    virtual const sc_event &value_changed_event() const = 0;
116    virtual const sc_event &posedge_event() const = 0;
117    virtual const sc_event &negedge_event() const = 0;
118
119    virtual bool event() const = 0;
120    virtual bool posedge() const = 0;
121    virtual bool negedge() const = 0;
122
123  protected:
124    sc_signal_in_if() : sc_interface() {}
125
126  private:
127    // Disabled
128    sc_signal_in_if(const sc_signal_in_if<sc_dt::sc_logic> &) :
129            sc_interface()
130    {}
131    sc_signal_in_if<sc_dt::sc_logic> &
132    operator = (const sc_signal_in_if<sc_dt::sc_logic> &)
133    {
134        return *this;
135    }
136};
137
138} // namespace sc_core
139
140#endif  //__SYSTEMC_EXT_CHANNEL_SC_SIGNAL_IN_IF_HH__
141