1 /* Hardware event manager.
2 Copyright (C) 1998-2018 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 */
33 hw_event_callback *callback;
35 struct hw_event_data *entry;
40 struct hw_event event;
41 struct hw_event_data *next;
45 create_hw_event_data (struct hw *me)
47 if (me->events_of_hw != NULL)
48 hw_abort (me, "stray events");
53 delete_hw_event_data (struct hw *me)
55 /* Remove the scheduled event. */
56 while (me->events_of_hw)
57 hw_event_queue_deschedule (me, &me->events_of_hw->event);
61 /* Pass the H/W event onto the real callback */
64 bounce_hw_event (SIM_DESC sd,
68 struct hw_event_data *entry = (struct hw_event_data *) data;
69 struct hw *me = entry->event.me;
70 void *event_data = entry->event.data;
71 hw_event_callback *callback = entry->event.callback;
72 struct hw_event_data **prev = &me->events_of_hw;
73 while ((*prev) != entry)
74 prev = &(*prev)->next;
75 (*prev) = entry->next;
77 callback (me, event_data); /* may not return */
82 /* Map onto the event functions */
85 hw_event_queue_schedule (struct hw *me,
87 hw_event_callback *callback,
90 struct hw_event *event;
92 memset (&dummy, 0, sizeof dummy);
93 event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data,
99 hw_event_queue_schedule_tracef (struct hw *me,
101 hw_event_callback *callback,
106 struct hw_event *event;
109 event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data, fmt, ap);
115 hw_event_queue_schedule_vtracef (struct hw *me,
117 hw_event_callback *callback,
122 struct hw_event_data *entry = HW_ZALLOC (me, struct hw_event_data);
123 entry->next = me->events_of_hw;
124 me->events_of_hw = entry;
126 entry->event.entry = entry;
127 entry->event.data = data;
128 entry->event.callback = callback;
129 entry->event.me = me;
130 entry->event.real = sim_events_schedule_vtracef (hw_system (me),
135 return &entry->event;
140 hw_event_queue_deschedule (struct hw *me,
141 struct hw_event *event_to_remove)
143 /* ZAP the event but only if it is still in the event queue. Note
144 that event_to_remove is only de-referenced after its validity has
146 struct hw_event_data **prev;
147 for (prev = &me->events_of_hw;
149 prev = &(*prev)->next)
151 struct hw_event_data *entry = (*prev);
152 if (&entry->event == event_to_remove)
154 sim_events_deschedule (hw_system (me),
156 (*prev) = entry->next;
165 hw_event_queue_time (struct hw *me)
167 return sim_events_time (hw_system (me));
170 /* Returns the time that remains before the event is raised. */
172 hw_event_remain_time (struct hw *me, struct hw_event *event)
176 t = sim_events_remain_time (hw_system (me), event->real);
180 /* Only worry about this compling on ANSI systems.
181 Build with `make test-hw-events' in sim/<cpu> directory*/
184 #include "sim-main.h"
189 test_handler (struct hw *me,
193 if (*n != hw_event_queue_time (me))
202 host_callback *cb = ZALLOC (host_callback);
203 struct sim_state *sd = sim_state_alloc (0, cb);
204 struct hw *me = ZALLOC (struct hw);
205 sim_pre_argv_init (sd, "test-hw-events");
206 sim_post_argv_init (sd);
207 me->system_of_hw = sd;
209 printf ("Create hw-event-data\n");
211 create_hw_alloc_data (me);
212 create_hw_event_data (me);
213 delete_hw_event_data (me);
214 delete_hw_alloc_data (me);
217 printf ("Create hw-events\n");
223 create_hw_alloc_data (me);
224 create_hw_event_data (me);
225 a = hw_event_queue_schedule (me, 0, NULL, NULL);
226 b = hw_event_queue_schedule (me, 1, NULL, NULL);
227 c = hw_event_queue_schedule (me, 2, NULL, NULL);
228 d = hw_event_queue_schedule (me, 1, NULL, NULL);
229 hw_event_queue_deschedule (me, c);
230 hw_event_queue_deschedule (me, b);
231 hw_event_queue_deschedule (me, a);
232 hw_event_queue_deschedule (me, d);
233 c = HW_ZALLOC (me, struct hw_event);
234 hw_event_queue_deschedule (me, b); /* OOPS! */
236 delete_hw_event_data (me);
237 delete_hw_alloc_data (me);
240 printf ("Schedule hw-events\n");
246 e = HW_NZALLOC (me, struct hw_event *, nr);
247 n = HW_NZALLOC (me, int, nr);
248 create_hw_alloc_data (me);
249 create_hw_event_data (me);
250 for (i = 0; i < nr; i++)
253 e[i] = hw_event_queue_schedule (me, i, test_handler, &n[i]);
255 sim_events_preprocess (sd, 1, 1);
256 for (i = 0; i < nr; i++)
258 if (sim_events_tick (sd))
259 sim_events_process (sd);
261 for (i = 0; i < nr; i++)
265 hw_event_queue_deschedule (me, e[i]);
269 delete_hw_event_data (me);
270 delete_hw_alloc_data (me);