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

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26 *
27 * Authors: Gabe Black
28 */
29
30#ifndef __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_HH__
31#define __SYSTEMC_EXT_CHANNEL_SC_SIGNAL_HH__
32
33#include <iostream>
34#include <sstream>
35#include <string>
36#include <vector>
37
38#include "../core/sc_event.hh"
39#include "../core/sc_module.hh" // for sc_gen_unique_name
40#include "../core/sc_prim.hh"
41#include "../dt/bit/sc_logic.hh"
42#include "sc_signal_inout_if.hh"
42#include "warn_unimpl.hh" // for warn_unimpl
43
44namespace sc_core
45{
46
47class sc_port_base;
48
49template <class T, sc_writer_policy WRITER_POLICY=SC_ONE_WRITER>
50class sc_signal : public sc_signal_inout_if<T>,
51 public sc_prim_channel
52{
53 public:
54 sc_signal() : sc_signal_inout_if<T>(),
55 sc_prim_channel(sc_gen_unique_name("signal")),
56 m_cur_val(T()), m_new_val(T()), _changeStamp(~0ULL)
56 m_cur_val(T()), m_new_val(T()), _changeStamp(~0ULL),
57 _gem5Writer(NULL)
58 {}
59 explicit sc_signal(const char *name) :
60 sc_signal_inout_if<T>(), sc_prim_channel(name),
60 m_cur_val(T()), m_new_val(T()), _changeStamp(~0ULL)
61 m_cur_val(T()), m_new_val(T()), _changeStamp(~0ULL),
62 _gem5Writer(NULL)
63 {}
64 explicit sc_signal(const char *name, const T &initial_value) :
65 sc_signal_inout_if<T>(), sc_prim_channel(name),
64 m_cur_val(initial_value), m_new_val(initial_value), _changeStamp(~0ULL)
66 m_cur_val(initial_value), m_new_val(initial_value),
67 _changeStamp(~0ULL), _gem5Writer(NULL)
68 {}
69 virtual ~sc_signal() {}
70
71 virtual void
69 register_port(sc_port_base &, const char *)
72 register_port(sc_port_base &port, const char *iface_type_name)
73 {
71 sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
74 if (WRITER_POLICY == SC_ONE_WRITER &&
75 std::string(iface_type_name) ==
76 typeid(sc_signal_inout_if<T>).name()) {
77 if (_gem5Writer) {
78 std::ostringstream ss;
79 ss << "\n signal " << "`" << name() << "' (" <<
80 kind() << ")";
81 ss << "\n first driver `" << _gem5Writer->name() << "' (" <<
82 _gem5Writer->kind() << ")";
83 ss << "\n second driver `" << port.name() << "' (" <<
84 port.kind() << ")";
85 SC_REPORT_ERROR(
86 "(E115) sc_signal<T> cannot have more than one driver",
87 ss.str().c_str());
88 }
89 _gem5Writer = &port;
90 }
91 }
92
93 virtual const T &read() const { return m_cur_val; }
94 operator const T&() const { return read(); }
95
96 virtual sc_writer_policy
97 get_writer_policy() const
98 {

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170 // are not specified in the standard but are referred to directly by one
171 // of the tests.
172 T m_cur_val;
173 T m_new_val;
174
175 private:
176 sc_event _valueChangedEvent;
177 uint64_t _changeStamp;
178 sc_port_base *_gem5Writer;
179
180 // Disabled
181 sc_signal(const sc_signal<T, WRITER_POLICY> &) :
182 sc_signal_inout_if<T>(), sc_prim_channel("")
183 {}
184};
185
186template <class T, sc_writer_policy WRITER_POLICY>

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194template <sc_writer_policy WRITER_POLICY>
195class sc_signal<bool, WRITER_POLICY> :
196 public sc_signal_inout_if<bool>, public sc_prim_channel
197{
198 public:
199 sc_signal() : sc_signal_inout_if<bool>(),
200 sc_prim_channel(sc_gen_unique_name("signal")),
201 m_cur_val(bool()), m_new_val(bool()),
182 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
202 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
203 _gem5Writer(NULL)
204 {}
205 explicit sc_signal(const char *name) :
206 sc_signal_inout_if<bool>(), sc_prim_channel(name),
207 m_cur_val(bool()), m_new_val(bool()),
187 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
208 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
209 _gem5Writer(NULL)
210 {}
211 explicit sc_signal(const char *name, const bool &initial_value) :
212 sc_signal_inout_if<bool>(), sc_prim_channel(name),
213 m_cur_val(initial_value), m_new_val(initial_value),
192 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
214 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
215 _gem5Writer(NULL)
216 {}
217 virtual ~sc_signal() {}
218
219 virtual void
197 register_port(sc_port_base &, const char *)
220 register_port(sc_port_base &port, const char *iface_type_name)
221 {
199 sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
222 if (WRITER_POLICY == SC_ONE_WRITER &&
223 std::string(iface_type_name) ==
224 typeid(sc_signal_inout_if<bool>).name()) {
225 if (_gem5Writer) {
226 std::ostringstream ss;
227 ss << "\n signal " << "`" << name() << "' (" <<
228 kind() << ")";
229 ss << "\n first driver `" << _gem5Writer->name() << "' (" <<
230 _gem5Writer->kind() << ")";
231 ss << "\n second driver `" << port.name() << "' (" <<
232 port.kind() << ")";
233 SC_REPORT_ERROR(
234 "(E115) sc_signal<T> cannot have more than one driver",
235 ss.str().c_str());
236 }
237 _gem5Writer = &port;
238 }
239 }
240
241 virtual const bool &read() const { return m_cur_val; }
242 operator const bool &() const { return read(); }
243
244 virtual sc_writer_policy
245 get_writer_policy() const
246 {

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348 sc_event _valueChangedEvent;
349 sc_event _posedgeEvent;
350 sc_event _negedgeEvent;
351
352 uint64_t _changeStamp;
353 uint64_t _posStamp;
354 uint64_t _negStamp;
355
356 sc_port_base *_gem5Writer;
357
358 // Disabled
359 sc_signal(const sc_signal<bool, WRITER_POLICY> &) :
360 sc_signal_inout_if<bool>(), sc_prim_channel("")
361 {}
362};
363
364template <sc_writer_policy WRITER_POLICY>
365class sc_signal<sc_dt::sc_logic, WRITER_POLICY> :
366 public sc_signal_inout_if<sc_dt::sc_logic>, public sc_prim_channel
367{
368 public:
369 sc_signal() : sc_signal_inout_if<sc_dt::sc_logic>(),
370 sc_prim_channel(sc_gen_unique_name("signal")),
371 m_cur_val(sc_dt::sc_logic()), m_new_val(sc_dt::sc_logic()),
331 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
372 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
373 _gem5Writer(NULL)
374 {}
375 explicit sc_signal(const char *name) :
376 sc_signal_inout_if<sc_dt::sc_logic>(), sc_prim_channel(name),
377 m_cur_val(sc_dt::sc_logic()), m_new_val(sc_dt::sc_logic()),
336 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
378 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
379 _gem5Writer(NULL)
380 {}
381 explicit sc_signal(const char *name,
382 const sc_dt::sc_logic &initial_value) :
383 sc_signal_inout_if<sc_dt::sc_logic>(), sc_prim_channel(name),
384 m_cur_val(initial_value), m_new_val(initial_value),
342 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL)
385 _changeStamp(~0ULL), _posStamp(~0ULL), _negStamp(~0ULL),
386 _gem5Writer(NULL)
387 {}
388 virtual ~sc_signal() {}
389
390 virtual void
347 register_port(sc_port_base &, const char *)
391 register_port(sc_port_base &port, const char *iface_type_name)
392 {
349 sc_channel_warn_unimpl(__PRETTY_FUNCTION__);
393 if (WRITER_POLICY == SC_ONE_WRITER &&
394 std::string(iface_type_name) ==
395 typeid(sc_signal_inout_if<sc_dt::sc_logic>).name()) {
396 if (_gem5Writer) {
397 std::ostringstream ss;
398 ss << "\n signal " << "`" << name() << "' (" <<
399 kind() << ")";
400 ss << "\n first driver `" << _gem5Writer->name() << "' (" <<
401 _gem5Writer->kind() << ")";
402 ss << "\n second driver `" << port.name() << "' (" <<
403 port.kind() << ")";
404 SC_REPORT_ERROR(
405 "(E115) sc_signal<T> cannot have more than one driver",
406 ss.str().c_str());
407 }
408 _gem5Writer = &port;
409 }
410 }
411
412 virtual const sc_dt::sc_logic &read() const { return m_cur_val; }
413 operator const sc_dt::sc_logic &() const { return read(); }
414
415 virtual sc_writer_policy
416 get_writer_policy() const
417 {

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519 sc_event _valueChangedEvent;
520 sc_event _posedgeEvent;
521 sc_event _negedgeEvent;
522
523 uint64_t _changeStamp;
524 uint64_t _posStamp;
525 uint64_t _negStamp;
526
527 sc_port_base *_gem5Writer;
528
529 // Disabled
530 sc_signal(const sc_signal<sc_dt::sc_logic, WRITER_POLICY> &) :
531 sc_signal_inout_if<sc_dt::sc_logic>(), sc_prim_channel("")
532 {}
533};
534
535} // namespace sc_core
536
537#endif //__SYSTEMC_EXT_CHANNEL_SC_SIGNAL_HH__