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c906108c | 1 | /* Hardware event manager. |
6aba47ca | 2 | Copyright (C) 1998, 2007 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Support. |
4 | ||
5 | This file is part of GDB, the GNU debugger. | |
6 | ||
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 | |
4744ac1b JB |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
c906108c SS |
11 | |
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. | |
16 | ||
4744ac1b JB |
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/>. */ | |
c906108c SS |
19 | |
20 | ||
21 | #include "hw-main.h" | |
22 | #include "hw-base.h" | |
23 | ||
24 | #include "sim-events.h" | |
25 | ||
26 | ||
27 | /* The hw-events object is implemented using sim-events */ | |
28 | ||
29 | struct hw_event { | |
30 | void *data; | |
31 | struct hw *me; | |
32 | hw_event_callback *callback; | |
33 | sim_event *real; | |
34 | struct hw_event_data *entry; | |
35 | }; | |
36 | ||
37 | struct hw_event_data { | |
38 | struct hw_event event; | |
39 | struct hw_event_data *next; | |
40 | }; | |
41 | ||
42 | void | |
43 | create_hw_event_data (struct hw *me) | |
44 | { | |
45 | if (me->events_of_hw != NULL) | |
46 | hw_abort (me, "stray events"); | |
47 | /* NOP */ | |
48 | } | |
49 | ||
50 | void | |
51 | delete_hw_event_data (struct hw *me) | |
52 | { | |
4e73b9c1 SC |
53 | /* Remove the scheduled event. */ |
54 | while (me->events_of_hw) | |
55 | hw_event_queue_deschedule (me, &me->events_of_hw->event); | |
c906108c SS |
56 | } |
57 | ||
58 | ||
59 | /* Pass the H/W event onto the real callback */ | |
60 | ||
61 | static void | |
62 | bounce_hw_event (SIM_DESC sd, | |
63 | void *data) | |
64 | { | |
65 | /* save the data */ | |
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; | |
74 | hw_free (me, entry); | |
75 | callback (me, event_data); /* may not return */ | |
76 | } | |
77 | ||
78 | ||
79 | ||
80 | /* Map onto the event functions */ | |
81 | ||
82 | struct hw_event * | |
83 | hw_event_queue_schedule (struct hw *me, | |
84 | signed64 delta_time, | |
85 | hw_event_callback *callback, | |
86 | void *data) | |
87 | { | |
88 | struct hw_event *event; | |
89 | va_list dummy; | |
27961795 | 90 | memset (&dummy, 0, sizeof dummy); |
c906108c SS |
91 | event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data, |
92 | NULL, dummy); | |
93 | return event; | |
94 | } | |
95 | ||
96 | struct hw_event * | |
97 | hw_event_queue_schedule_tracef (struct hw *me, | |
98 | signed64 delta_time, | |
99 | hw_event_callback *callback, | |
100 | void *data, | |
101 | const char *fmt, | |
102 | ...) | |
103 | { | |
104 | struct hw_event *event; | |
105 | va_list ap; | |
106 | va_start (ap, fmt); | |
107 | event = hw_event_queue_schedule_vtracef (me, delta_time, callback, data, fmt, ap); | |
108 | va_end (ap); | |
109 | return event; | |
110 | } | |
111 | ||
112 | struct hw_event * | |
113 | hw_event_queue_schedule_vtracef (struct hw *me, | |
114 | signed64 delta_time, | |
115 | hw_event_callback *callback, | |
116 | void *data, | |
117 | const char *fmt, | |
118 | va_list ap) | |
119 | { | |
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; | |
123 | /* fill it in */ | |
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), | |
129 | delta_time, | |
130 | bounce_hw_event, | |
131 | entry, | |
132 | fmt, ap); | |
133 | return &entry->event; | |
134 | } | |
135 | ||
136 | ||
137 | void | |
138 | hw_event_queue_deschedule (struct hw *me, | |
139 | struct hw_event *event_to_remove) | |
140 | { | |
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 | |
143 | been confirmed. */ | |
144 | struct hw_event_data **prev; | |
145 | for (prev = &me->events_of_hw; | |
146 | (*prev) != NULL; | |
147 | prev = &(*prev)->next) | |
148 | { | |
149 | struct hw_event_data *entry = (*prev); | |
150 | if (&entry->event == event_to_remove) | |
151 | { | |
152 | sim_events_deschedule (hw_system (me), | |
153 | entry->event.real); | |
154 | (*prev) = entry->next; | |
155 | hw_free (me, entry); | |
156 | return; | |
157 | } | |
158 | } | |
159 | } | |
160 | ||
161 | ||
162 | signed64 | |
163 | hw_event_queue_time (struct hw *me) | |
164 | { | |
165 | return sim_events_time (hw_system (me)); | |
166 | } | |
167 | ||
38e64f35 AC |
168 | /* Returns the time that remains before the event is raised. */ |
169 | signed64 | |
170 | hw_event_remain_time (struct hw *me, struct hw_event *event) | |
171 | { | |
172 | signed64 t; | |
173 | ||
174 | t = sim_events_remain_time (hw_system (me), event->real); | |
175 | return t; | |
176 | } | |
c906108c SS |
177 | |
178 | /* Only worry about this compling on ANSI systems. | |
179 | Build with `make test-hw-events' in sim/<cpu> directory*/ | |
180 | ||
181 | #if defined (MAIN) | |
182 | #include "sim-main.h" | |
183 | #include <string.h> | |
184 | #include <stdio.h> | |
185 | ||
186 | static void | |
187 | test_handler (struct hw *me, | |
188 | void *data) | |
189 | { | |
190 | int *n = data; | |
191 | if (*n != hw_event_queue_time (me)) | |
192 | abort (); | |
193 | *n = -(*n); | |
194 | } | |
195 | ||
196 | int | |
197 | main (int argc, | |
198 | char **argv) | |
199 | { | |
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; | |
206 | ||
207 | printf ("Create hw-event-data\n"); | |
208 | { | |
209 | create_hw_alloc_data (me); | |
210 | create_hw_event_data (me); | |
211 | delete_hw_event_data (me); | |
212 | delete_hw_alloc_data (me); | |
213 | } | |
214 | ||
215 | printf ("Create hw-events\n"); | |
216 | { | |
217 | struct hw_event *a; | |
218 | struct hw_event *b; | |
219 | struct hw_event *c; | |
220 | struct hw_event *d; | |
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! */ | |
233 | hw_free (me, c); | |
234 | delete_hw_event_data (me); | |
235 | delete_hw_alloc_data (me); | |
236 | } | |
237 | ||
238 | printf ("Schedule hw-events\n"); | |
239 | { | |
240 | struct hw_event **e; | |
241 | int *n; | |
242 | int i; | |
243 | int nr = 4; | |
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++) | |
249 | { | |
250 | n[i] = i; | |
251 | e[i] = hw_event_queue_schedule (me, i, test_handler, &n[i]); | |
252 | } | |
253 | sim_events_preprocess (sd, 1, 1); | |
254 | for (i = 0; i < nr; i++) | |
255 | { | |
256 | if (sim_events_tick (sd)) | |
257 | sim_events_process (sd); | |
258 | } | |
259 | for (i = 0; i < nr; i++) | |
260 | { | |
261 | if (n[i] != -i) | |
262 | abort (); | |
263 | hw_event_queue_deschedule (me, e[i]); | |
264 | } | |
265 | hw_free (me, n); | |
266 | hw_free (me, e); | |
267 | delete_hw_event_data (me); | |
268 | delete_hw_alloc_data (me); | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | #endif |