summaryrefslogtreecommitdiff
path: root/src/systemc/core/process.hh
blob: 17f417b6e26183d813db9fda85b21183da84991d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/*
 * Copyright 2018 Google, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Gabe Black
 */

#ifndef __SYSTEMC_CORE_PROCESS_HH__
#define __SYSTEMC_CORE_PROCESS_HH__

#include <functional>
#include <memory>
#include <vector>

#include "base/fiber.hh"
#include "sim/eventq.hh"
#include "systemc/core/bindinfo.hh"
#include "systemc/core/list.hh"
#include "systemc/core/object.hh"
#include "systemc/core/sched_event.hh"
#include "systemc/ext/core/sc_event.hh"
#include "systemc/ext/core/sc_export.hh"
#include "systemc/ext/core/sc_interface.hh"
#include "systemc/ext/core/sc_module.hh"
#include "systemc/ext/core/sc_port.hh"
#include "systemc/ext/core/sc_process_handle.hh"
#include "systemc/ext/utils/sc_report.hh"

namespace sc_gem5
{

class Sensitivity
{
  protected:
    Process *process;

  public:
    Sensitivity(Process *p) : process(p) {}
    virtual ~Sensitivity() {}

    virtual void notifyWork(Event *e);
    void notify(Event *e);
    void notify() { notify(nullptr); }

    const std::string name();
};

class SensitivityTimeout : virtual public Sensitivity
{
  private:
    void timeout();
    ScEvent timeoutEvent;

  public:
    SensitivityTimeout(Process *p, ::sc_core::sc_time t);
    ~SensitivityTimeout();
};

class SensitivityEvent : virtual public Sensitivity
{
  private:
    const ::sc_core::sc_event *event;

  public:
    SensitivityEvent(Process *p, const ::sc_core::sc_event *e);
    ~SensitivityEvent();
};

//XXX This sensitivity can't be reused. To reset it, it has to be deleted and
//recreated. That works for dynamic sensitivities, but not for static.
//Fortunately processes can't be statically sensitive to sc_event_and_lists.
class SensitivityEventAndList : virtual public Sensitivity
{
  private:
    const ::sc_core::sc_event_and_list *list;
    int count;

  public:
    SensitivityEventAndList(
            Process *p, const ::sc_core::sc_event_and_list *list);
    ~SensitivityEventAndList();

    void notifyWork(Event *e) override;
};

class SensitivityEventOrList : virtual public Sensitivity
{
  private:
    const ::sc_core::sc_event_or_list *list;

  public:
    SensitivityEventOrList(
            Process *p, const ::sc_core::sc_event_or_list *list);
    ~SensitivityEventOrList();
};

// Combined sensitivities. These trigger when any of their parts do.

class SensitivityTimeoutAndEvent :
    public SensitivityTimeout, public SensitivityEvent
{
  public:
    SensitivityTimeoutAndEvent(
            Process *p, ::sc_core::sc_time t, const ::sc_core::sc_event *e) :
        Sensitivity(p), SensitivityTimeout(p, t), SensitivityEvent(p, e)
    {}
};

class SensitivityTimeoutAndEventAndList :
    public SensitivityTimeout, public SensitivityEventAndList
{
  public:
    SensitivityTimeoutAndEventAndList(
            Process *p, ::sc_core::sc_time t,
            const ::sc_core::sc_event_and_list *eal) :
        Sensitivity(p), SensitivityTimeout(p, t),
        SensitivityEventAndList(p, eal)
    {}

    void notifyWork(Event *e) override;
};

class SensitivityTimeoutAndEventOrList :
    public SensitivityTimeout, public SensitivityEventOrList
{
  public:
    SensitivityTimeoutAndEventOrList(
            Process *p, ::sc_core::sc_time t,
            const ::sc_core::sc_event_or_list *eol) :
        Sensitivity(p), SensitivityTimeout(p, t),
        SensitivityEventOrList(p, eol)
    {}
};

typedef std::vector<Sensitivity *> Sensitivities;


/*
 * Pending sensitivities. These are records of sensitivities to install later,
 * once all the information to configure them is available.
 */

class PendingSensitivity
{
  protected:
    Process *process;

  public:
    virtual void finalize(Sensitivities &s) = 0;
    PendingSensitivity(Process *p) : process(p) {}
    virtual ~PendingSensitivity() {}
};

class PendingSensitivityEvent : public PendingSensitivity
{
  private:
    const sc_core::sc_event *event;

  public:
    PendingSensitivityEvent(Process *p, const sc_core::sc_event *e) :
        PendingSensitivity(p), event(e) {}

    void
    finalize(Sensitivities &s) override
    {
        s.push_back(new SensitivityEvent(process, event));
    }
};

class PendingSensitivityInterface : public PendingSensitivity
{
  private:
    const sc_core::sc_interface *interface;

  public:
    PendingSensitivityInterface(Process *p, const sc_core::sc_interface *i) :
        PendingSensitivity(p), interface(i)
    {}

    void
    finalize(Sensitivities &s) override
    {
        s.push_back(new SensitivityEvent(process,
                                         &interface->default_event()));
    }
};

class PendingSensitivityPort : public PendingSensitivity
{
  private:
    const sc_core::sc_port_base *port;

  public:
    PendingSensitivityPort(Process *p, const sc_core::sc_port_base *pb) :
        PendingSensitivity(p), port(pb)
    {}

    void
    finalize(Sensitivities &s) override
    {
        for (int i = 0; i < port->size(); i++) {
            const ::sc_core::sc_event *e =
                &port->_gem5Interface(i)->default_event();
            s.push_back(new SensitivityEvent(process, e));
        }
    }
};

class PendingSensitivityExport : public PendingSensitivity
{
  private:
    const sc_core::sc_export_base *exp;

  public:
    PendingSensitivityExport(Process *p, const sc_core::sc_export_base *exp) :
        PendingSensitivity(p), exp(exp)
    {}

    void
    finalize(Sensitivities &s) override
    {
        s.push_back(new SensitivityEvent(process,
                    &exp->get_interface()->default_event()));
    }
};

class PendingSensitivityFinder : public PendingSensitivity
{
  private:
    const sc_core::sc_event_finder *finder;

  public:
    PendingSensitivityFinder(Process *p, const sc_core::sc_event_finder *f) :
        PendingSensitivity(p), finder(f)
    {}

    void
    finalize(Sensitivities &s) override
    {
        s.push_back(new SensitivityEvent(process, &finder->find_event()));
    }
};

typedef std::vector<PendingSensitivity *> PendingSensitivities;


class Process : public ::sc_core::sc_process_b, public ListNode
{
  public:
    virtual ::sc_core::sc_curr_proc_kind procKind() const = 0;
    bool needsStart() const { return _needsStart; }
    bool dynamic() const { return _dynamic; }
    bool isUnwinding() const { return _isUnwinding; }
    void isUnwinding(bool v) { _isUnwinding = v; }
    bool terminated() const { return _terminated; }

    void forEachKid(const std::function<void(Process *)> &work);

    bool suspended() const { return _suspended; }
    bool disabled() const { return _disabled; }

    void suspend(bool inc_kids);
    void resume(bool inc_kids);
    void disable(bool inc_kids);
    void enable(bool inc_kids);

    void kill(bool inc_kids);
    void reset(bool inc_kids);
    virtual void throw_it(ExceptionWrapperBase &exc, bool inc_kids);

    void injectException(ExceptionWrapperBase &exc);
    ExceptionWrapperBase *excWrapper;

    void syncResetOn(bool inc_kids);
    void syncResetOff(bool inc_kids);

    void incref() { refCount++; }
    void decref() { refCount--; }

    const ::sc_core::sc_event &resetEvent() { return _resetEvent; }
    const ::sc_core::sc_event &terminatedEvent() { return _terminatedEvent; }

    // This should only be called before initialization.
    void dontInitialize();

    void setStackSize(size_t size) { stackSize = size; }

    void finalize();

    void run();

    void addStatic(PendingSensitivity *);
    void setDynamic(Sensitivity *);

    void satisfySensitivity(Sensitivity *);

    void ready();

    virtual Fiber *fiber() { return Fiber::primaryFiber(); }

    static Process *newest() { return _newest; }

    void lastReport(::sc_core::sc_report *report);
    ::sc_core::sc_report *lastReport() const;

  protected:
    Process(const char *name, ProcessFuncWrapper *func, bool _dynamic);

    static Process *_newest;

    virtual ~Process()
    {
        popListNode();
        delete func;
        for (auto s: staticSensitivities)
            delete s;
    }

    ::sc_core::sc_event _resetEvent;
    ::sc_core::sc_event _terminatedEvent;

    ProcessFuncWrapper *func;
    sc_core::sc_curr_proc_kind _procKind;
    bool _needsStart;
    bool _dynamic;
    bool _isUnwinding;
    bool _terminated;

    void terminate();

    bool _suspended;
    bool _suspendedReady;
    bool _disabled;

    bool _syncReset;

    int refCount;

    size_t stackSize;

    Sensitivities staticSensitivities;
    PendingSensitivities pendingStaticSensitivities;

    Sensitivity *dynamicSensitivity;

    std::unique_ptr<::sc_core::sc_report> _lastReport;
};

inline void
Sensitivity::notifyWork(Event *e)
{
    process->satisfySensitivity(this);
}

inline void
Sensitivity::notify(Event *e)
{
    if (!process->disabled())
        notifyWork(e);
}

inline const std::string
Sensitivity::name()
{
    return std::string(process->name()) + ".timeout";
}

} // namespace sc_gem5

#endif  //__SYSTEMC_CORE_PROCESS_HH__