1 /* Hardware event manager.
2 Copyright (C) 1998, 2007, 2008 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
5 This file is part of GDB, the GNU debugger.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "sim-events.h"
27 /* The hw-events object is implemented using sim-events */
32 hw_event_callback *callback;
34 struct hw_event_data *entry;
37 struct hw_event_data {
38 struct hw_event event;
39 struct hw_event_data *next;
43 create_hw_event_data (struct hw *me)
45 if (me->events_of_hw != NULL)
46 hw_abort (me, "stray events");
51 delete_hw_event_data (struct hw *me)
53 /* Remove the scheduled event. */
54 while (me->events_of_hw)
55 hw_event_queue_deschedule (me, &me->events_of_hw->event);
59 /* Pass the H/W event onto the real callback */
62 bounce_hw_event (SIM_DESC sd,
66 struct hw_event_data *entry = (struct hw_event_data *) data;
67 struct hw *me = entry->event.me;
68 void *event_data = entry->event.data;
69 hw_event_callback *callback = entry->event.callback;
70 struct hw_event_data **prev = &me->events_of_hw;
71 while ((*prev) != entry)
72 prev = &(*prev)->next;
73 (*prev) = entry->next;
75 callback (me, event_data); /* may not return */
80 /* Map onto the event functions */
83 hw_event_queue_schedule (struct hw *me,
85 hw_event_callback *callback,
88 struct hw_event *event;
90 memset (&dummy, 0, sizeof dummy);
91 event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data,
97 hw_event_queue_schedule_tracef (struct hw *me,
99 hw_event_callback *callback,
104 struct hw_event *event;
107 event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data, fmt, ap);
113 hw_event_queue_schedule_vtracef (struct hw *me,
115 hw_event_callback *callback,
120 struct hw_event_data *entry = HW_ZALLOC (me, struct hw_event_data);
121 entry->next = me->events_of_hw;
122 me->events_of_hw = entry;
124 entry->event.entry = entry;
125 entry->event.data = data;
126 entry->event.callback = callback;
127 entry->event.me = me;
128 entry->event.real = sim_events_schedule_vtracef (hw_system (me),
133 return &entry->event;
138 hw_event_queue_deschedule (struct hw *me,
139 struct hw_event *event_to_remove)
141 /* ZAP the event but only if it is still in the event queue. Note
142 that event_to_remove is only de-referenced after its validity has
144 struct hw_event_data **prev;
145 for (prev = &me->events_of_hw;
147 prev = &(*prev)->next)
149 struct hw_event_data *entry = (*prev);
150 if (&entry->event == event_to_remove)
152 sim_events_deschedule (hw_system (me),
154 (*prev) = entry->next;
163 hw_event_queue_time (struct hw *me)
165 return sim_events_time (hw_system (me));
168 /* Returns the time that remains before the event is raised. */
170 hw_event_remain_time (struct hw *me, struct hw_event *event)
174 t = sim_events_remain_time (hw_system (me), event->real);
178 /* Only worry about this compling on ANSI systems.
179 Build with `make test-hw-events' in sim/<cpu> directory*/
182 #include "sim-main.h"
187 test_handler (struct hw *me,
191 if (*n != hw_event_queue_time (me))
200 host_callback *cb = ZALLOC (host_callback);
201 struct sim_state *sd = sim_state_alloc (0, cb);
202 struct hw *me = ZALLOC (struct hw);
203 sim_pre_argv_init (sd, "test-hw-events");
204 sim_post_argv_init (sd);
205 me->system_of_hw = sd;
207 printf ("Create hw-event-data\n");
209 create_hw_alloc_data (me);
210 create_hw_event_data (me);
211 delete_hw_event_data (me);
212 delete_hw_alloc_data (me);
215 printf ("Create hw-events\n");
221 create_hw_alloc_data (me);
222 create_hw_event_data (me);
223 a = hw_event_queue_schedule (me, 0, NULL, NULL);
224 b = hw_event_queue_schedule (me, 1, NULL, NULL);
225 c = hw_event_queue_schedule (me, 2, NULL, NULL);
226 d = hw_event_queue_schedule (me, 1, NULL, NULL);
227 hw_event_queue_deschedule (me, c);
228 hw_event_queue_deschedule (me, b);
229 hw_event_queue_deschedule (me, a);
230 hw_event_queue_deschedule (me, d);
231 c = HW_ZALLOC (me, struct hw_event);
232 hw_event_queue_deschedule (me, b); /* OOPS! */
234 delete_hw_event_data (me);
235 delete_hw_alloc_data (me);
238 printf ("Schedule hw-events\n");
244 e = HW_NZALLOC (me, struct hw_event *, nr);
245 n = HW_NZALLOC (me, int, nr);
246 create_hw_alloc_data (me);
247 create_hw_event_data (me);
248 for (i = 0; i < nr; i++)
251 e[i] = hw_event_queue_schedule (me, i, test_handler, &n[i]);
253 sim_events_preprocess (sd, 1, 1);
254 for (i = 0; i < nr; i++)
256 if (sim_events_tick (sd))
257 sim_events_process (sd);
259 for (i = 0; i < nr; i++)
263 hw_event_queue_deschedule (me, e[i]);
267 delete_hw_event_data (me);
268 delete_hw_alloc_data (me);