Merge remote-tracking branch 'remotes/philmd-gitlab/tags/renesas-20201027' into staging
[qemu.git] / hw / core / reset.c
1 /*
2 * Reset handlers.
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2016 Red Hat, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "qemu/osdep.h"
27 #include "qemu/queue.h"
28 #include "sysemu/reset.h"
29
30 /* reset/shutdown handler */
31
32 typedef struct QEMUResetEntry {
33 QTAILQ_ENTRY(QEMUResetEntry) entry;
34 QEMUResetHandler *func;
35 void *opaque;
36 } QEMUResetEntry;
37
38 static QTAILQ_HEAD(, QEMUResetEntry) reset_handlers =
39 QTAILQ_HEAD_INITIALIZER(reset_handlers);
40
41 void qemu_register_reset(QEMUResetHandler *func, void *opaque)
42 {
43 QEMUResetEntry *re = g_malloc0(sizeof(QEMUResetEntry));
44
45 re->func = func;
46 re->opaque = opaque;
47 QTAILQ_INSERT_TAIL(&reset_handlers, re, entry);
48 }
49
50 void qemu_unregister_reset(QEMUResetHandler *func, void *opaque)
51 {
52 QEMUResetEntry *re;
53
54 QTAILQ_FOREACH(re, &reset_handlers, entry) {
55 if (re->func == func && re->opaque == opaque) {
56 QTAILQ_REMOVE(&reset_handlers, re, entry);
57 g_free(re);
58 return;
59 }
60 }
61 }
62
63 void qemu_devices_reset(void)
64 {
65 QEMUResetEntry *re, *nre;
66
67 /* reset all devices */
68 QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) {
69 re->func(re->opaque);
70 }
71 }
72