FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/intr.c
1 /* $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 2004 Olivier Houchard.
5 * Copyright (c) 1994-1998 Mark Brinicombe.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Mark Brinicombe
19 * for the NetBSD Project.
20 * 4. The name of the company nor the name of the author may be used to
21 * endorse or promote products derived from this software without specific
22 * prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * Soft interrupt and other generic interrupt functions.
37 */
38
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD: releng/6.2/sys/arm/arm/intr.c 156543 2006-03-10 19:37:35Z jhb $");
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/syslog.h>
44 #include <sys/malloc.h>
45 #include <sys/proc.h>
46 #include <sys/bus.h>
47 #include <sys/interrupt.h>
48 #include <sys/conf.h>
49 #include <machine/atomic.h>
50 #include <machine/intr.h>
51 #include <machine/cpu.h>
52
53 static struct intr_event *intr_events[NIRQ];
54 static int intrcnt_tab[NIRQ];
55 static int intrcnt_index = 0;
56 static int last_printed = 0;
57
58 void arm_handler_execute(void *, int);
59
60 void
61 arm_setup_irqhandler(const char *name, void (*hand)(void*), void *arg,
62 int irq, int flags, void **cookiep)
63 {
64 struct intr_event *event;
65 int error;
66
67 if (irq < 0 || irq >= NIRQ)
68 return;
69 event = intr_events[irq];
70 if (event == NULL) {
71 error = intr_event_create(&event, (void *)irq, 0,
72 (void (*)(void *))arm_unmask_irq, "intr%d:", irq);
73 if (error)
74 return;
75 intr_events[irq] = event;
76 last_printed +=
77 snprintf(intrnames + last_printed,
78 MAXCOMLEN + 1,
79 "irq%d: %s", irq, name);
80 last_printed++;
81 intrcnt_tab[irq] = intrcnt_index;
82 intrcnt_index++;
83
84 }
85 intr_event_add_handler(event, name, hand, arg,
86 intr_priority(flags), flags, cookiep);
87 }
88
89 int
90 arm_remove_irqhandler(void *cookie)
91 {
92 return (intr_event_remove_handler(cookie));
93 }
94
95 void dosoftints(void);
96 void
97 dosoftints(void)
98 {
99 }
100
101 void
102 arm_handler_execute(void *frame, int irqnb)
103 {
104 struct intr_event *event;
105 struct intr_handler *ih;
106 struct thread *td = curthread;
107 int i, thread;
108
109 td->td_intr_nesting_level++;
110 while ((i = arm_get_next_irq()) != -1) {
111 arm_mask_irq(i);
112 intrcnt[intrcnt_tab[i]]++;
113 event = intr_events[i];
114 if (!event || TAILQ_EMPTY(&event->ie_handlers))
115 continue;
116
117 /* Execute fast handlers. */
118 thread = 0;
119 TAILQ_FOREACH(ih, &event->ie_handlers, ih_next) {
120 if (!(ih->ih_flags & IH_FAST))
121 thread = 1;
122 else
123 ih->ih_handler(ih->ih_argument ?
124 ih->ih_argument : frame);
125 }
126
127 /* Schedule thread if needed. */
128 if (thread)
129 intr_event_schedule_thread(event);
130 else
131 arm_unmask_irq(i);
132 }
133 td->td_intr_nesting_level--;
134 }
Cache object: fdb2b2b7be052164402410d3ef930c8d
|