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c906108c SS |
1 | /* This file is part of the program psim. |
2 | ||
3 | Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | #ifndef _SIM_EVENTS_C_ | |
23 | #define _SIM_EVENTS_C_ | |
24 | ||
25 | #include "sim-main.h" | |
26 | #include "sim-assert.h" | |
27 | ||
28 | #ifdef HAVE_STRING_H | |
29 | #include <string.h> | |
30 | #else | |
31 | #ifdef HAVE_STRINGS_H | |
32 | #include <strings.h> | |
33 | #endif | |
34 | #endif | |
35 | ||
36 | #ifdef HAVE_STDLIB_H | |
37 | #include <stdlib.h> | |
38 | #endif | |
39 | ||
6439295f | 40 | #include <signal.h> /* For SIGPROCMASK et al. */ |
c906108c | 41 | |
c906108c SS |
42 | typedef enum { |
43 | watch_invalid, | |
44 | ||
45 | /* core - target byte order */ | |
46 | watch_core_targ_1, | |
47 | watch_core_targ_2, | |
48 | watch_core_targ_4, | |
49 | watch_core_targ_8, | |
50 | /* core - big-endian */ | |
51 | watch_core_be_1, | |
52 | watch_core_be_2, | |
53 | watch_core_be_4, | |
54 | watch_core_be_8, | |
55 | /* core - little-endian */ | |
56 | watch_core_le_1, | |
57 | watch_core_le_2, | |
58 | watch_core_le_4, | |
59 | watch_core_le_8, | |
60 | ||
61 | /* sim - host byte order */ | |
62 | watch_sim_host_1, | |
63 | watch_sim_host_2, | |
64 | watch_sim_host_4, | |
65 | watch_sim_host_8, | |
66 | /* sim - big-endian */ | |
67 | watch_sim_be_1, | |
68 | watch_sim_be_2, | |
69 | watch_sim_be_4, | |
70 | watch_sim_be_8, | |
71 | /* sim - little-endian */ | |
72 | watch_sim_le_1, | |
73 | watch_sim_le_2, | |
74 | watch_sim_le_4, | |
75 | watch_sim_le_8, | |
76 | ||
77 | /* wallclock */ | |
78 | watch_clock, | |
79 | ||
80 | /* timer */ | |
81 | watch_timer, | |
82 | } sim_event_watchpoints; | |
83 | ||
84 | ||
85 | struct _sim_event { | |
86 | sim_event_watchpoints watching; | |
87 | void *data; | |
88 | sim_event_handler *handler; | |
89 | /* timer event */ | |
90 | signed64 time_of_event; | |
91 | /* watch wallclock event */ | |
92 | unsigned wallclock; | |
93 | /* watch core address */ | |
94 | address_word core_addr; | |
95 | unsigned core_map; | |
96 | /* watch sim addr */ | |
97 | void *host_addr; | |
98 | /* watch core/sim range */ | |
99 | int is_within; /* 0/1 */ | |
100 | unsigned ub; | |
101 | unsigned lb; | |
102 | unsigned64 ub64; | |
103 | unsigned64 lb64; | |
104 | /* trace info (if any) */ | |
105 | char *trace; | |
106 | /* list */ | |
107 | sim_event *next; | |
108 | }; | |
109 | ||
110 | ||
111 | /* The event queue maintains a single absolute time using two | |
112 | variables. | |
113 | ||
114 | TIME_OF_EVENT: this holds the time at which the next event is ment | |
6439295f | 115 | to occur. If no next event it will hold the time of the last |
c906108c SS |
116 | event. |
117 | ||
118 | TIME_FROM_EVENT: The current distance from TIME_OF_EVENT. A value | |
119 | <= 0 (except when poll-event is being processed) indicates that | |
120 | event processing is due. This variable is decremented once for | |
121 | each iteration of a clock cycle. | |
122 | ||
123 | Initially, the clock is started at time one (0) with TIME_OF_EVENT | |
124 | == 0 and TIME_FROM_EVENT == 0 and with NR_TICKS_TO_PROCESS == 1. | |
125 | ||
126 | Clearly there is a bug in that this code assumes that the absolute | |
127 | time counter will never become greater than 2^62. | |
128 | ||
129 | To avoid the need to use 64bit arithmetic, the event queue always | |
130 | contains at least one event scheduled every 16 000 ticks. This | |
131 | limits the time from event counter to values less than | |
132 | 16 000. */ | |
133 | ||
134 | ||
135 | #if !defined (SIM_EVENTS_POLL_RATE) | |
136 | #define SIM_EVENTS_POLL_RATE 0x1000 | |
137 | #endif | |
138 | ||
139 | ||
140 | #define _ETRACE sd, NULL | |
141 | ||
142 | #undef ETRACE_P | |
143 | #define ETRACE_P (WITH_TRACE && STATE_EVENTS (sd)->trace) | |
144 | ||
145 | #undef ETRACE | |
146 | #define ETRACE(ARGS) \ | |
147 | do \ | |
148 | { \ | |
149 | if (ETRACE_P) \ | |
150 | { \ | |
151 | if (STRACE_DEBUG_P (sd)) \ | |
152 | { \ | |
153 | const char *file; \ | |
154 | SIM_FILTER_PATH (file, __FILE__); \ | |
155 | trace_printf (sd, NULL, "%s:%d: ", file, __LINE__); \ | |
156 | } \ | |
157 | trace_printf ARGS; \ | |
158 | } \ | |
159 | } \ | |
160 | while (0) | |
161 | ||
162 | ||
163 | /* event queue iterator - don't iterate over the held queue. */ | |
164 | ||
165 | #if EXTERN_SIM_EVENTS_P | |
166 | static sim_event ** | |
167 | next_event_queue (SIM_DESC sd, | |
168 | sim_event **queue) | |
169 | { | |
170 | if (queue == NULL) | |
171 | return &STATE_EVENTS (sd)->queue; | |
172 | else if (queue == &STATE_EVENTS (sd)->queue) | |
173 | return &STATE_EVENTS (sd)->watchpoints; | |
174 | else if (queue == &STATE_EVENTS (sd)->watchpoints) | |
175 | return &STATE_EVENTS (sd)->watchedpoints; | |
176 | else if (queue == &STATE_EVENTS (sd)->watchedpoints) | |
177 | return NULL; | |
178 | else | |
179 | sim_io_error (sd, "next_event_queue - bad queue"); | |
180 | return NULL; | |
181 | } | |
182 | #endif | |
183 | ||
184 | ||
185 | STATIC_INLINE_SIM_EVENTS\ | |
186 | (void) | |
187 | sim_events_poll (SIM_DESC sd, | |
188 | void *data) | |
189 | { | |
190 | /* just re-schedule in 1000 million ticks time */ | |
191 | sim_events_schedule (sd, SIM_EVENTS_POLL_RATE, sim_events_poll, sd); | |
192 | sim_io_poll_quit (sd); | |
193 | } | |
194 | ||
195 | ||
196 | /* "events" module install handler. | |
197 | This is called via sim_module_install to install the "events" subsystem | |
198 | into the simulator. */ | |
199 | ||
200 | #if EXTERN_SIM_EVENTS_P | |
201 | STATIC_SIM_EVENTS (MODULE_UNINSTALL_FN) sim_events_uninstall; | |
202 | STATIC_SIM_EVENTS (MODULE_INIT_FN) sim_events_init; | |
203 | STATIC_SIM_EVENTS (MODULE_RESUME_FN) sim_events_resume; | |
204 | STATIC_SIM_EVENTS (MODULE_SUSPEND_FN) sim_events_suspend; | |
205 | #endif | |
206 | ||
207 | #if EXTERN_SIM_EVENTS_P | |
208 | SIM_RC | |
209 | sim_events_install (SIM_DESC sd) | |
210 | { | |
211 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
212 | sim_module_add_uninstall_fn (sd, sim_events_uninstall); | |
213 | sim_module_add_init_fn (sd, sim_events_init); | |
214 | sim_module_add_resume_fn (sd, sim_events_resume); | |
215 | sim_module_add_suspend_fn (sd, sim_events_suspend); | |
216 | return SIM_RC_OK; | |
217 | } | |
218 | #endif | |
219 | ||
220 | ||
221 | /* Suspend/resume the event queue manager when the simulator is not | |
222 | running */ | |
223 | ||
224 | #if EXTERN_SIM_EVENTS_P | |
225 | static SIM_RC | |
226 | sim_events_resume (SIM_DESC sd) | |
227 | { | |
228 | sim_events *events = STATE_EVENTS (sd); | |
229 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
230 | SIM_ASSERT (events->resume_wallclock == 0); | |
231 | events->resume_wallclock = sim_elapsed_time_get (); | |
232 | return SIM_RC_OK; | |
233 | } | |
234 | #endif | |
235 | ||
236 | #if EXTERN_SIM_EVENTS_P | |
237 | static SIM_RC | |
238 | sim_events_suspend (SIM_DESC sd) | |
239 | { | |
240 | sim_events *events = STATE_EVENTS (sd); | |
241 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
242 | SIM_ASSERT (events->resume_wallclock != 0); | |
243 | events->elapsed_wallclock += sim_elapsed_time_since (events->resume_wallclock); | |
244 | events->resume_wallclock = 0; | |
245 | return SIM_RC_OK; | |
246 | } | |
247 | #endif | |
248 | ||
249 | ||
250 | /* Uninstall the "events" subsystem from the simulator. */ | |
251 | ||
252 | #if EXTERN_SIM_EVENTS_P | |
253 | static void | |
254 | sim_events_uninstall (SIM_DESC sd) | |
255 | { | |
256 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
257 | /* FIXME: free buffers, etc. */ | |
258 | } | |
259 | #endif | |
260 | ||
261 | ||
262 | /* malloc/free */ | |
263 | ||
264 | #if EXTERN_SIM_EVENTS_P | |
265 | static sim_event * | |
266 | sim_events_zalloc (SIM_DESC sd) | |
267 | { | |
268 | sim_events *events = STATE_EVENTS (sd); | |
269 | sim_event *new = events->free_list; | |
270 | if (new != NULL) | |
271 | { | |
272 | events->free_list = new->next; | |
273 | memset (new, 0, sizeof (*new)); | |
274 | } | |
275 | else | |
276 | { | |
277 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
278 | /*-LOCK-*/ | |
279 | sigset_t old_mask; | |
280 | sigset_t new_mask; | |
281 | sigfillset(&new_mask); | |
282 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); | |
283 | #endif | |
284 | new = ZALLOC (sim_event); | |
285 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
286 | /*-UNLOCK-*/ | |
287 | sigprocmask (SIG_SETMASK, &old_mask, NULL); | |
288 | #endif | |
289 | } | |
290 | return new; | |
291 | } | |
292 | #endif | |
293 | ||
294 | STATIC_INLINE_SIM_EVENTS\ | |
295 | (void) | |
296 | sim_events_free (SIM_DESC sd, | |
297 | sim_event *dead) | |
298 | { | |
299 | sim_events *events = STATE_EVENTS (sd); | |
300 | dead->next = events->free_list; | |
301 | events->free_list = dead; | |
302 | if (dead->trace != NULL) | |
303 | { | |
304 | free (dead->trace); /* NB: asprintf returns a `free' buf */ | |
305 | dead->trace = NULL; | |
306 | } | |
307 | } | |
308 | ||
309 | ||
310 | /* Initialize the simulator event manager */ | |
311 | ||
312 | #if EXTERN_SIM_EVENTS_P | |
313 | SIM_RC | |
314 | sim_events_init (SIM_DESC sd) | |
315 | { | |
316 | sim_events *events = STATE_EVENTS (sd); | |
317 | ||
318 | /* drain the interrupt queue */ | |
319 | events->nr_held = 0; | |
320 | if (events->held == NULL) | |
321 | events->held = NZALLOC (sim_event, MAX_NR_SIGNAL_SIM_EVENTS); | |
322 | ||
323 | /* drain the normal queues */ | |
324 | { | |
325 | sim_event **queue = NULL; | |
326 | while ((queue = next_event_queue (sd, queue)) != NULL) | |
327 | { | |
328 | if (queue == NULL) break; | |
329 | while (*queue != NULL) | |
330 | { | |
331 | sim_event *dead = *queue; | |
332 | *queue = dead->next; | |
333 | sim_events_free (sd, dead); | |
334 | } | |
335 | *queue = NULL; | |
336 | } | |
337 | } | |
338 | ||
339 | /* wind time back to zero */ | |
340 | events->nr_ticks_to_process = 1; /* start by doing queue */ | |
341 | events->time_of_event = 0; | |
342 | events->time_from_event = 0; | |
343 | events->elapsed_wallclock = 0; | |
344 | events->resume_wallclock = 0; | |
345 | ||
346 | /* schedule our initial counter event */ | |
347 | sim_events_schedule (sd, 0, sim_events_poll, sd); | |
348 | ||
349 | /* from now on, except when the large-int event is being processed | |
350 | the event queue is non empty */ | |
351 | SIM_ASSERT (events->queue != NULL); | |
352 | ||
353 | return SIM_RC_OK; | |
354 | } | |
355 | #endif | |
356 | ||
357 | ||
358 | INLINE_SIM_EVENTS\ | |
359 | (signed64) | |
360 | sim_events_time (SIM_DESC sd) | |
361 | { | |
362 | sim_events *events = STATE_EVENTS (sd); | |
363 | return (events->time_of_event - events->time_from_event); | |
364 | } | |
365 | ||
366 | ||
367 | INLINE_SIM_EVENTS\ | |
368 | (unsigned long) | |
369 | sim_events_elapsed_time (SIM_DESC sd) | |
370 | { | |
371 | unsigned long elapsed = STATE_EVENTS (sd)->elapsed_wallclock; | |
372 | ||
373 | /* Are we being called inside sim_resume? | |
374 | (Is there a simulation in progress?) */ | |
375 | if (STATE_EVENTS (sd)->resume_wallclock != 0) | |
376 | elapsed += sim_elapsed_time_since (STATE_EVENTS (sd)->resume_wallclock); | |
377 | ||
378 | return elapsed; | |
379 | } | |
380 | ||
381 | ||
38e64f35 AC |
382 | /* Returns the time that remains before the event is raised. */ |
383 | INLINE_SIM_EVENTS\ | |
384 | (signed64) | |
385 | sim_events_remain_time (SIM_DESC sd, sim_event *event) | |
386 | { | |
387 | if (event == 0) | |
388 | return 0; | |
389 | ||
390 | return (event->time_of_event - sim_events_time (sd)); | |
391 | } | |
392 | ||
393 | ||
394 | ||
c906108c SS |
395 | STATIC_INLINE_SIM_EVENTS\ |
396 | (void) | |
397 | update_time_from_event (SIM_DESC sd) | |
398 | { | |
399 | sim_events *events = STATE_EVENTS (sd); | |
400 | signed64 current_time = sim_events_time (sd); | |
401 | if (events->queue != NULL) | |
402 | { | |
403 | events->time_of_event = events->queue->time_of_event; | |
404 | events->time_from_event = (events->queue->time_of_event - current_time); | |
405 | } | |
406 | else | |
407 | { | |
408 | events->time_of_event = current_time - 1; | |
409 | events->time_from_event = -1; | |
410 | } | |
5eb1a8fa AC |
411 | if (ETRACE_P) |
412 | { | |
413 | sim_event *event; | |
414 | int i; | |
415 | for (event = events->queue, i = 0; | |
416 | event != NULL; | |
417 | event = event->next, i++) | |
418 | { | |
419 | ETRACE ((_ETRACE, | |
420 | "event time-from-event - time %ld, delta %ld - event %d, tag 0x%lx, time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
421 | (long)current_time, | |
422 | (long)events->time_from_event, | |
423 | i, | |
424 | (long)event, | |
425 | (long)event->time_of_event, | |
426 | (long)event->handler, | |
427 | (long)event->data, | |
428 | (event->trace != NULL) ? ", " : "", | |
429 | (event->trace != NULL) ? event->trace : "")); | |
430 | } | |
431 | } | |
c906108c SS |
432 | SIM_ASSERT (current_time == sim_events_time (sd)); |
433 | } | |
434 | ||
435 | ||
436 | #if EXTERN_SIM_EVENTS_P | |
437 | static void | |
438 | insert_sim_event (SIM_DESC sd, | |
439 | sim_event *new_event, | |
440 | signed64 delta) | |
441 | { | |
442 | sim_events *events = STATE_EVENTS (sd); | |
443 | sim_event *curr; | |
444 | sim_event **prev; | |
445 | signed64 time_of_event; | |
446 | ||
447 | if (delta < 0) | |
448 | sim_io_error (sd, "what is past is past!\n"); | |
449 | ||
6439295f | 450 | /* compute when the event should occur */ |
c906108c SS |
451 | time_of_event = sim_events_time (sd) + delta; |
452 | ||
453 | /* find the queue insertion point - things are time ordered */ | |
454 | prev = &events->queue; | |
455 | curr = events->queue; | |
456 | while (curr != NULL && time_of_event >= curr->time_of_event) | |
457 | { | |
458 | SIM_ASSERT (curr->next == NULL | |
459 | || curr->time_of_event <= curr->next->time_of_event); | |
460 | prev = &curr->next; | |
461 | curr = curr->next; | |
462 | } | |
463 | SIM_ASSERT (curr == NULL || time_of_event < curr->time_of_event); | |
464 | ||
465 | /* insert it */ | |
466 | new_event->next = curr; | |
467 | *prev = new_event; | |
468 | new_event->time_of_event = time_of_event; | |
469 | ||
470 | /* adjust the time until the first event */ | |
471 | update_time_from_event (sd); | |
472 | } | |
473 | #endif | |
474 | ||
475 | ||
476 | #if EXTERN_SIM_EVENTS_P | |
477 | sim_event * | |
478 | sim_events_schedule (SIM_DESC sd, | |
479 | signed64 delta_time, | |
480 | sim_event_handler *handler, | |
481 | void *data) | |
482 | { | |
483 | va_list dummy; | |
484 | return sim_events_schedule_vtracef (sd, delta_time, handler, data, | |
485 | NULL, dummy); | |
486 | } | |
487 | #endif | |
488 | ||
489 | ||
490 | #if EXTERN_SIM_EVENTS_P | |
491 | sim_event * | |
492 | sim_events_schedule_tracef (SIM_DESC sd, | |
493 | signed64 delta_time, | |
494 | sim_event_handler *handler, | |
495 | void *data, | |
496 | const char *fmt, | |
497 | ...) | |
498 | { | |
499 | sim_event *new_event; | |
500 | va_list ap; | |
501 | va_start (ap, fmt); | |
502 | new_event = sim_events_schedule_vtracef (sd, delta_time, handler, data, fmt, ap); | |
503 | va_end (ap); | |
504 | return new_event; | |
505 | } | |
506 | #endif | |
507 | ||
508 | ||
509 | #if EXTERN_SIM_EVENTS_P | |
510 | sim_event * | |
511 | sim_events_schedule_vtracef (SIM_DESC sd, | |
512 | signed64 delta_time, | |
513 | sim_event_handler *handler, | |
514 | void *data, | |
515 | const char *fmt, | |
516 | va_list ap) | |
517 | { | |
518 | sim_event *new_event = sim_events_zalloc (sd); | |
519 | new_event->data = data; | |
520 | new_event->handler = handler; | |
521 | new_event->watching = watch_timer; | |
522 | if (fmt == NULL || !ETRACE_P || vasprintf (&new_event->trace, fmt, ap) < 0) | |
523 | new_event->trace = NULL; | |
524 | insert_sim_event(sd, new_event, delta_time); | |
525 | ETRACE((_ETRACE, | |
526 | "event scheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
527 | (long)sim_events_time(sd), | |
528 | (long)new_event, | |
529 | (long)new_event->time_of_event, | |
530 | (long)new_event->handler, | |
531 | (long)new_event->data, | |
532 | (new_event->trace != NULL) ? ", " : "", | |
533 | (new_event->trace != NULL) ? new_event->trace : "")); | |
534 | return new_event; | |
535 | } | |
536 | #endif | |
537 | ||
538 | ||
539 | #if EXTERN_SIM_EVENTS_P | |
540 | void | |
541 | sim_events_schedule_after_signal (SIM_DESC sd, | |
542 | signed64 delta_time, | |
543 | sim_event_handler *handler, | |
544 | void *data) | |
545 | { | |
546 | sim_events *events = STATE_EVENTS (sd); | |
547 | sim_event *new_event; | |
548 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
549 | /*-LOCK-*/ | |
550 | sigset_t old_mask; | |
551 | sigset_t new_mask; | |
552 | sigfillset(&new_mask); | |
553 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); | |
554 | #endif | |
555 | ||
556 | /* allocate an event entry from the signal buffer */ | |
557 | new_event = &events->held [events->nr_held]; | |
558 | events->nr_held ++; | |
559 | if (events->nr_held > MAX_NR_SIGNAL_SIM_EVENTS) | |
560 | { | |
561 | sim_engine_abort (NULL, NULL, NULL_CIA, | |
562 | "sim_events_schedule_after_signal - buffer oveflow"); | |
563 | } | |
564 | ||
565 | new_event->data = data; | |
566 | new_event->handler = handler; | |
567 | new_event->time_of_event = delta_time; /* work it out later */ | |
568 | new_event->next = NULL; | |
569 | ||
570 | events->work_pending = 1; /* notify main process */ | |
571 | ||
572 | #if defined (HAVE_SIGPROCMASK) && defined (SIG_SETMASK) | |
573 | /*-UNLOCK-*/ | |
574 | sigprocmask (SIG_SETMASK, &old_mask, NULL); | |
575 | #endif | |
576 | ||
577 | ETRACE ((_ETRACE, | |
578 | "signal scheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx\n", | |
579 | (long)sim_events_time(sd), | |
580 | (long)new_event, | |
581 | (long)new_event->time_of_event, | |
582 | (long)new_event->handler, | |
583 | (long)new_event->data)); | |
584 | } | |
585 | #endif | |
586 | ||
587 | ||
588 | #if EXTERN_SIM_EVENTS_P | |
589 | sim_event * | |
590 | sim_events_watch_clock (SIM_DESC sd, | |
591 | unsigned delta_ms_time, | |
592 | sim_event_handler *handler, | |
593 | void *data) | |
594 | { | |
595 | sim_events *events = STATE_EVENTS (sd); | |
596 | sim_event *new_event = sim_events_zalloc (sd); | |
597 | /* type */ | |
598 | new_event->watching = watch_clock; | |
599 | /* handler */ | |
600 | new_event->data = data; | |
601 | new_event->handler = handler; | |
602 | /* data */ | |
603 | if (events->resume_wallclock == 0) | |
604 | new_event->wallclock = (events->elapsed_wallclock + delta_ms_time); | |
605 | else | |
606 | new_event->wallclock = (events->elapsed_wallclock | |
607 | + sim_elapsed_time_since (events->resume_wallclock) | |
608 | + delta_ms_time); | |
609 | /* insert */ | |
610 | new_event->next = events->watchpoints; | |
611 | events->watchpoints = new_event; | |
612 | events->work_pending = 1; | |
613 | ETRACE ((_ETRACE, | |
614 | "event watching clock at %ld - tag 0x%lx - wallclock %ld, handler 0x%lx, data 0x%lx\n", | |
615 | (long)sim_events_time (sd), | |
616 | (long)new_event, | |
617 | (long)new_event->wallclock, | |
618 | (long)new_event->handler, | |
619 | (long)new_event->data)); | |
620 | return new_event; | |
621 | } | |
622 | #endif | |
623 | ||
624 | ||
625 | #if EXTERN_SIM_EVENTS_P | |
626 | sim_event * | |
627 | sim_events_watch_sim (SIM_DESC sd, | |
628 | void *host_addr, | |
629 | int nr_bytes, | |
630 | int byte_order, | |
631 | int is_within, | |
632 | unsigned64 lb, | |
633 | unsigned64 ub, | |
634 | sim_event_handler *handler, | |
635 | void *data) | |
636 | { | |
637 | sim_events *events = STATE_EVENTS (sd); | |
638 | sim_event *new_event = sim_events_zalloc (sd); | |
639 | /* type */ | |
640 | switch (byte_order) | |
641 | { | |
642 | case 0: | |
643 | switch (nr_bytes) | |
644 | { | |
645 | case 1: new_event->watching = watch_sim_host_1; break; | |
646 | case 2: new_event->watching = watch_sim_host_2; break; | |
647 | case 4: new_event->watching = watch_sim_host_4; break; | |
648 | case 8: new_event->watching = watch_sim_host_8; break; | |
649 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
650 | } | |
651 | break; | |
652 | case BIG_ENDIAN: | |
653 | switch (nr_bytes) | |
654 | { | |
655 | case 1: new_event->watching = watch_sim_be_1; break; | |
656 | case 2: new_event->watching = watch_sim_be_2; break; | |
657 | case 4: new_event->watching = watch_sim_be_4; break; | |
658 | case 8: new_event->watching = watch_sim_be_8; break; | |
659 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
660 | } | |
661 | break; | |
662 | case LITTLE_ENDIAN: | |
663 | switch (nr_bytes) | |
664 | { | |
665 | case 1: new_event->watching = watch_sim_le_1; break; | |
666 | case 2: new_event->watching = watch_sim_le_2; break; | |
667 | case 4: new_event->watching = watch_sim_le_4; break; | |
668 | case 8: new_event->watching = watch_sim_le_8; break; | |
669 | default: sim_io_error (sd, "sim_events_watch_sim - invalid nr bytes"); | |
670 | } | |
671 | break; | |
672 | default: | |
673 | sim_io_error (sd, "sim_events_watch_sim - invalid byte order"); | |
674 | } | |
675 | /* handler */ | |
676 | new_event->data = data; | |
677 | new_event->handler = handler; | |
678 | /* data */ | |
679 | new_event->host_addr = host_addr; | |
680 | new_event->lb = lb; | |
681 | new_event->lb64 = lb; | |
682 | new_event->ub = ub; | |
683 | new_event->ub64 = ub; | |
684 | new_event->is_within = (is_within != 0); | |
685 | /* insert */ | |
686 | new_event->next = events->watchpoints; | |
687 | events->watchpoints = new_event; | |
688 | events->work_pending = 1; | |
689 | ETRACE ((_ETRACE, | |
690 | "event watching host at %ld - tag 0x%lx - host-addr 0x%lx, 0x%lx..0x%lx, handler 0x%lx, data 0x%lx\n", | |
691 | (long)sim_events_time (sd), | |
692 | (long)new_event, | |
693 | (long)new_event->host_addr, | |
694 | (long)new_event->lb, | |
695 | (long)new_event->ub, | |
696 | (long)new_event->handler, | |
697 | (long)new_event->data)); | |
698 | return new_event; | |
699 | } | |
700 | #endif | |
701 | ||
702 | ||
703 | #if EXTERN_SIM_EVENTS_P | |
704 | sim_event * | |
705 | sim_events_watch_core (SIM_DESC sd, | |
706 | address_word core_addr, | |
707 | unsigned core_map, | |
708 | int nr_bytes, | |
709 | int byte_order, | |
710 | int is_within, | |
711 | unsigned64 lb, | |
712 | unsigned64 ub, | |
713 | sim_event_handler *handler, | |
714 | void *data) | |
715 | { | |
716 | sim_events *events = STATE_EVENTS (sd); | |
717 | sim_event *new_event = sim_events_zalloc (sd); | |
718 | /* type */ | |
719 | switch (byte_order) | |
720 | { | |
721 | case 0: | |
722 | switch (nr_bytes) | |
723 | { | |
724 | case 1: new_event->watching = watch_core_targ_1; break; | |
725 | case 2: new_event->watching = watch_core_targ_2; break; | |
726 | case 4: new_event->watching = watch_core_targ_4; break; | |
727 | case 8: new_event->watching = watch_core_targ_8; break; | |
728 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
729 | } | |
730 | break; | |
731 | case BIG_ENDIAN: | |
732 | switch (nr_bytes) | |
733 | { | |
734 | case 1: new_event->watching = watch_core_be_1; break; | |
735 | case 2: new_event->watching = watch_core_be_2; break; | |
736 | case 4: new_event->watching = watch_core_be_4; break; | |
737 | case 8: new_event->watching = watch_core_be_8; break; | |
738 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
739 | } | |
740 | break; | |
741 | case LITTLE_ENDIAN: | |
742 | switch (nr_bytes) | |
743 | { | |
744 | case 1: new_event->watching = watch_core_le_1; break; | |
745 | case 2: new_event->watching = watch_core_le_2; break; | |
746 | case 4: new_event->watching = watch_core_le_4; break; | |
747 | case 8: new_event->watching = watch_core_le_8; break; | |
748 | default: sim_io_error (sd, "sim_events_watch_core - invalid nr bytes"); | |
749 | } | |
750 | break; | |
751 | default: | |
752 | sim_io_error (sd, "sim_events_watch_core - invalid byte order"); | |
753 | } | |
754 | /* handler */ | |
755 | new_event->data = data; | |
756 | new_event->handler = handler; | |
757 | /* data */ | |
758 | new_event->core_addr = core_addr; | |
759 | new_event->core_map = core_map; | |
760 | new_event->lb = lb; | |
761 | new_event->lb64 = lb; | |
762 | new_event->ub = ub; | |
763 | new_event->ub64 = ub; | |
764 | new_event->is_within = (is_within != 0); | |
765 | /* insert */ | |
766 | new_event->next = events->watchpoints; | |
767 | events->watchpoints = new_event; | |
768 | events->work_pending = 1; | |
769 | ETRACE ((_ETRACE, | |
770 | "event watching host at %ld - tag 0x%lx - host-addr 0x%lx, 0x%lx..0x%lx, handler 0x%lx, data 0x%lx\n", | |
771 | (long)sim_events_time (sd), | |
772 | (long)new_event, | |
773 | (long)new_event->host_addr, | |
774 | (long)new_event->lb, | |
775 | (long)new_event->ub, | |
776 | (long)new_event->handler, | |
777 | (long)new_event->data)); | |
778 | return new_event; | |
779 | } | |
780 | #endif | |
781 | ||
782 | ||
783 | #if EXTERN_SIM_EVENTS_P | |
784 | void | |
785 | sim_events_deschedule (SIM_DESC sd, | |
786 | sim_event *event_to_remove) | |
787 | { | |
788 | sim_events *events = STATE_EVENTS (sd); | |
789 | sim_event *to_remove = (sim_event*)event_to_remove; | |
790 | if (event_to_remove != NULL) | |
791 | { | |
792 | sim_event **queue = NULL; | |
793 | while ((queue = next_event_queue (sd, queue)) != NULL) | |
794 | { | |
795 | sim_event **ptr_to_current; | |
796 | for (ptr_to_current = queue; | |
797 | *ptr_to_current != NULL && *ptr_to_current != to_remove; | |
798 | ptr_to_current = &(*ptr_to_current)->next); | |
799 | if (*ptr_to_current == to_remove) | |
800 | { | |
801 | sim_event *dead = *ptr_to_current; | |
802 | *ptr_to_current = dead->next; | |
803 | ETRACE ((_ETRACE, | |
804 | "event/watch descheduled at %ld - tag 0x%lx - time %ld, handler 0x%lx, data 0x%lx%s%s\n", | |
805 | (long) sim_events_time (sd), | |
806 | (long) event_to_remove, | |
807 | (long) dead->time_of_event, | |
808 | (long) dead->handler, | |
809 | (long) dead->data, | |
810 | (dead->trace != NULL) ? ", " : "", | |
811 | (dead->trace != NULL) ? dead->trace : "")); | |
812 | sim_events_free (sd, dead); | |
813 | update_time_from_event (sd); | |
814 | SIM_ASSERT ((events->time_from_event >= 0) == (events->queue != NULL)); | |
815 | return; | |
816 | } | |
817 | } | |
818 | } | |
819 | ETRACE ((_ETRACE, | |
820 | "event/watch descheduled at %ld - tag 0x%lx - not found\n", | |
821 | (long) sim_events_time (sd), | |
822 | (long) event_to_remove)); | |
823 | } | |
824 | #endif | |
825 | ||
826 | ||
827 | STATIC_INLINE_SIM_EVENTS\ | |
828 | (int) | |
829 | sim_watch_valid (SIM_DESC sd, | |
830 | sim_event *to_do) | |
831 | { | |
832 | switch (to_do->watching) | |
833 | { | |
834 | ||
835 | #define WATCH_CORE(N,OP,EXT) \ | |
836 | int ok; \ | |
837 | unsigned_##N word = 0; \ | |
838 | int nr_read = sim_core_read_buffer (sd, NULL, to_do->core_map, &word, \ | |
839 | to_do->core_addr, sizeof (word)); \ | |
840 | OP (word); \ | |
841 | ok = (nr_read == sizeof (unsigned_##N) \ | |
842 | && (to_do->is_within \ | |
843 | == (word >= to_do->lb##EXT \ | |
844 | && word <= to_do->ub##EXT))); | |
845 | ||
846 | case watch_core_targ_1: | |
847 | { | |
848 | WATCH_CORE (1, T2H,); | |
849 | return ok; | |
850 | } | |
851 | case watch_core_targ_2: | |
852 | { | |
853 | WATCH_CORE (2, T2H,); | |
854 | return ok; | |
855 | } | |
856 | case watch_core_targ_4: | |
857 | { | |
858 | WATCH_CORE (4, T2H,); | |
859 | return ok; | |
860 | } | |
861 | case watch_core_targ_8: | |
862 | { | |
863 | WATCH_CORE (8, T2H,64); | |
864 | return ok; | |
865 | } | |
866 | ||
867 | case watch_core_be_1: | |
868 | { | |
869 | WATCH_CORE (1, BE2H,); | |
870 | return ok; | |
871 | } | |
872 | case watch_core_be_2: | |
873 | { | |
874 | WATCH_CORE (2, BE2H,); | |
875 | return ok; | |
876 | } | |
877 | case watch_core_be_4: | |
878 | { | |
879 | WATCH_CORE (4, BE2H,); | |
880 | return ok; | |
881 | } | |
882 | case watch_core_be_8: | |
883 | { | |
884 | WATCH_CORE (8, BE2H,64); | |
885 | return ok; | |
886 | } | |
887 | ||
888 | case watch_core_le_1: | |
889 | { | |
890 | WATCH_CORE (1, LE2H,); | |
891 | return ok; | |
892 | } | |
893 | case watch_core_le_2: | |
894 | { | |
895 | WATCH_CORE (2, LE2H,); | |
896 | return ok; | |
897 | } | |
898 | case watch_core_le_4: | |
899 | { | |
900 | WATCH_CORE (4, LE2H,); | |
901 | return ok; | |
902 | } | |
903 | case watch_core_le_8: | |
904 | { | |
905 | WATCH_CORE (8, LE2H,64); | |
906 | return ok; | |
907 | } | |
908 | #undef WATCH_CORE | |
909 | ||
910 | #define WATCH_SIM(N,OP,EXT) \ | |
911 | int ok; \ | |
912 | unsigned_##N word = *(unsigned_##N*)to_do->host_addr; \ | |
913 | OP (word); \ | |
914 | ok = (to_do->is_within \ | |
915 | == (word >= to_do->lb##EXT \ | |
916 | && word <= to_do->ub##EXT)); | |
917 | ||
918 | case watch_sim_host_1: | |
919 | { | |
920 | WATCH_SIM (1, word = ,); | |
921 | return ok; | |
922 | } | |
923 | case watch_sim_host_2: | |
924 | { | |
925 | WATCH_SIM (2, word = ,); | |
926 | return ok; | |
927 | } | |
928 | case watch_sim_host_4: | |
929 | { | |
930 | WATCH_SIM (4, word = ,); | |
931 | return ok; | |
932 | } | |
933 | case watch_sim_host_8: | |
934 | { | |
935 | WATCH_SIM (8, word = ,64); | |
936 | return ok; | |
937 | } | |
938 | ||
939 | case watch_sim_be_1: | |
940 | { | |
941 | WATCH_SIM (1, BE2H,); | |
942 | return ok; | |
943 | } | |
944 | case watch_sim_be_2: | |
945 | { | |
946 | WATCH_SIM (2, BE2H,); | |
947 | return ok; | |
948 | } | |
949 | case watch_sim_be_4: | |
950 | { | |
951 | WATCH_SIM (4, BE2H,); | |
952 | return ok; | |
953 | } | |
954 | case watch_sim_be_8: | |
955 | { | |
956 | WATCH_SIM (8, BE2H,64); | |
957 | return ok; | |
958 | } | |
959 | ||
960 | case watch_sim_le_1: | |
961 | { | |
962 | WATCH_SIM (1, LE2H,); | |
963 | return ok; | |
964 | } | |
965 | case watch_sim_le_2: | |
966 | { | |
967 | WATCH_SIM (1, LE2H,); | |
968 | return ok; | |
969 | } | |
970 | case watch_sim_le_4: | |
971 | { | |
972 | WATCH_SIM (1, LE2H,); | |
973 | return ok; | |
974 | } | |
975 | case watch_sim_le_8: | |
976 | { | |
977 | WATCH_SIM (1, LE2H,64); | |
978 | return ok; | |
979 | } | |
980 | #undef WATCH_SIM | |
981 | ||
982 | case watch_clock: /* wallclock */ | |
983 | { | |
984 | unsigned long elapsed_time = sim_events_elapsed_time (sd); | |
985 | return (elapsed_time >= to_do->wallclock); | |
986 | } | |
987 | ||
988 | default: | |
989 | sim_io_error (sd, "sim_watch_valid - bad switch"); | |
990 | break; | |
991 | ||
992 | } | |
993 | return 1; | |
994 | } | |
995 | ||
996 | ||
997 | INLINE_SIM_EVENTS\ | |
998 | (int) | |
999 | sim_events_tick (SIM_DESC sd) | |
1000 | { | |
1001 | sim_events *events = STATE_EVENTS (sd); | |
1002 | ||
1003 | /* this should only be called after the previous ticks have been | |
1004 | fully processed */ | |
1005 | ||
1006 | /* Advance the time but *only* if there is nothing to process */ | |
1007 | if (events->work_pending | |
1008 | || events->time_from_event == 0) | |
1009 | { | |
1010 | events->nr_ticks_to_process += 1; | |
1011 | return 1; | |
1012 | } | |
1013 | else | |
1014 | { | |
1015 | events->time_from_event -= 1; | |
1016 | return 0; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | ||
1021 | INLINE_SIM_EVENTS\ | |
1022 | (int) | |
1023 | sim_events_tickn (SIM_DESC sd, | |
1024 | int n) | |
1025 | { | |
1026 | sim_events *events = STATE_EVENTS (sd); | |
1027 | SIM_ASSERT (n > 0); | |
1028 | ||
1029 | /* this should only be called after the previous ticks have been | |
1030 | fully processed */ | |
1031 | ||
1032 | /* Advance the time but *only* if there is nothing to process */ | |
1033 | if (events->work_pending || events->time_from_event < n) | |
1034 | { | |
1035 | events->nr_ticks_to_process += n; | |
1036 | return 1; | |
1037 | } | |
1038 | else | |
1039 | { | |
1040 | events->time_from_event -= n; | |
1041 | return 0; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | ||
1046 | INLINE_SIM_EVENTS\ | |
1047 | (void) | |
1048 | sim_events_slip (SIM_DESC sd, | |
1049 | int slip) | |
1050 | { | |
1051 | sim_events *events = STATE_EVENTS (sd); | |
1052 | SIM_ASSERT (slip > 0); | |
1053 | ||
1054 | /* Flag a ready event with work_pending instead of number of ticks | |
1055 | to process so that the time continues to be correct */ | |
1056 | if (events->time_from_event < slip) | |
1057 | { | |
1058 | events->work_pending = 1; | |
1059 | } | |
1060 | events->time_from_event -= slip; | |
1061 | } | |
1062 | ||
1063 | ||
1064 | INLINE_SIM_EVENTS\ | |
1065 | (void) | |
1066 | sim_events_preprocess (SIM_DESC sd, | |
1067 | int events_were_last, | |
1068 | int events_were_next) | |
1069 | { | |
1070 | sim_events *events = STATE_EVENTS(sd); | |
1071 | if (events_were_last) | |
1072 | { | |
1073 | /* Halted part way through event processing */ | |
1074 | ASSERT (events->nr_ticks_to_process != 0); | |
1075 | /* The external world can't tell if the event that stopped the | |
1076 | simulator was the last event to process. */ | |
1077 | ASSERT (events_were_next); | |
1078 | sim_events_process (sd); | |
1079 | } | |
1080 | else if (events_were_next) | |
1081 | { | |
1082 | /* Halted by the last processor */ | |
1083 | if (sim_events_tick (sd)) | |
1084 | sim_events_process (sd); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | ||
1089 | INLINE_SIM_EVENTS\ | |
1090 | (void) | |
1091 | sim_events_process (SIM_DESC sd) | |
1092 | { | |
1093 | sim_events *events = STATE_EVENTS(sd); | |
1094 | signed64 event_time = sim_events_time(sd); | |
1095 | ||
1096 | /* Clear work_pending before checking nr_held. Clearing | |
1097 | work_pending after nr_held (with out a lock could loose an | |
1098 | event). */ | |
1099 | events->work_pending = 0; | |
1100 | ||
1101 | /* move any events that were asynchronously queued by any signal | |
1102 | handlers onto the real event queue. */ | |
1103 | if (events->nr_held > 0) | |
1104 | { | |
1105 | int i; | |
1106 | ||
1107 | #if defined(HAVE_SIGPROCMASK) && defined(SIG_SETMASK) | |
1108 | /*-LOCK-*/ | |
1109 | sigset_t old_mask; | |
1110 | sigset_t new_mask; | |
1111 | sigfillset(&new_mask); | |
1112 | sigprocmask(SIG_SETMASK, &new_mask, &old_mask); | |
1113 | #endif | |
1114 | ||
1115 | for (i = 0; i < events->nr_held; i++) | |
1116 | { | |
1117 | sim_event *entry = &events->held [i]; | |
1118 | sim_events_schedule (sd, | |
1119 | entry->time_of_event, | |
1120 | entry->handler, | |
1121 | entry->data); | |
1122 | } | |
1123 | events->nr_held = 0; | |
1124 | ||
1125 | #if defined(HAVE_SIGPROCMASK) && defined(SIG_SETMASK) | |
1126 | /*-UNLOCK-*/ | |
1127 | sigprocmask(SIG_SETMASK, &old_mask, NULL); | |
1128 | #endif | |
1129 | ||
1130 | } | |
1131 | ||
1132 | /* Process any watchpoints. Be careful to allow a watchpoint to | |
1133 | appear/disappear under our feet. | |
1134 | To ensure that watchpoints are processed only once per cycle, | |
1135 | they are moved onto a watched queue, this returned to the | |
1136 | watchpoint queue when all queue processing has been | |
1137 | completed. */ | |
1138 | while (events->watchpoints != NULL) | |
1139 | { | |
1140 | sim_event *to_do = events->watchpoints; | |
1141 | events->watchpoints = to_do->next; | |
1142 | if (sim_watch_valid (sd, to_do)) | |
1143 | { | |
1144 | sim_event_handler *handler = to_do->handler; | |
1145 | void *data = to_do->data; | |
1146 | ETRACE((_ETRACE, | |
1147 | "event issued at %ld - tag 0x%lx - handler 0x%lx, data 0x%lx%s%s\n", | |
1148 | (long) event_time, | |
1149 | (long) to_do, | |
1150 | (long) handler, | |
1151 | (long) data, | |
1152 | (to_do->trace != NULL) ? ", " : "", | |
1153 | (to_do->trace != NULL) ? to_do->trace : "")); | |
1154 | sim_events_free (sd, to_do); | |
1155 | handler (sd, data); | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | to_do->next = events->watchedpoints; | |
1160 | events->watchedpoints = to_do; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* consume all events for this or earlier times. Be careful to | |
1165 | allow an event to appear/disappear under our feet */ | |
1166 | while (events->queue->time_of_event < | |
1167 | (event_time + events->nr_ticks_to_process)) | |
1168 | { | |
1169 | sim_event *to_do = events->queue; | |
1170 | sim_event_handler *handler = to_do->handler; | |
1171 | void *data = to_do->data; | |
1172 | events->queue = to_do->next; | |
1173 | update_time_from_event (sd); | |
1174 | ETRACE((_ETRACE, | |
1175 | "event issued at %ld - tag 0x%lx - handler 0x%lx, data 0x%lx%s%s\n", | |
1176 | (long) event_time, | |
1177 | (long) to_do, | |
1178 | (long) handler, | |
1179 | (long) data, | |
1180 | (to_do->trace != NULL) ? ", " : "", | |
1181 | (to_do->trace != NULL) ? to_do->trace : "")); | |
1182 | sim_events_free (sd, to_do); | |
1183 | handler (sd, data); | |
1184 | } | |
1185 | ||
1186 | /* put things back where they belong ready for the next iteration */ | |
1187 | events->watchpoints = events->watchedpoints; | |
1188 | events->watchedpoints = NULL; | |
1189 | if (events->watchpoints != NULL) | |
1190 | events->work_pending = 1; | |
1191 | ||
1192 | /* advance the time */ | |
1193 | SIM_ASSERT (events->time_from_event >= events->nr_ticks_to_process); | |
1194 | SIM_ASSERT (events->queue != NULL); /* always poll event */ | |
1195 | events->time_from_event -= events->nr_ticks_to_process; | |
1196 | ||
1197 | /* this round of processing complete */ | |
1198 | events->nr_ticks_to_process = 0; | |
c906108c SS |
1199 | } |
1200 | ||
1201 | #endif |