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: src/sys/arm/arm/intr.c,v 1.24 2008/09/11 12:36:13 raj Exp $");
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 typedef void (*mask_fn)(void *);
54
55 static struct intr_event *intr_events[NIRQ];
56 static int intrcnt_tab[NIRQ];
57 static int intrcnt_index = 0;
58 static int last_printed = 0;
59
60 void arm_handler_execute(struct trapframe *, int);
61
62 void (*arm_post_filter)(void *) = NULL;
63
64 void
65 arm_setup_irqhandler(const char *name, driver_filter_t *filt,
66 void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
67 {
68 struct intr_event *event;
69 int error;
70
71 if (irq < 0 || irq >= NIRQ)
72 return;
73 event = intr_events[irq];
74 if (event == NULL) {
75 error = intr_event_create(&event, (void *)irq, 0, irq,
76 (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
77 arm_post_filter, NULL, "intr%d:", irq);
78 if (error)
79 return;
80 intr_events[irq] = event;
81 last_printed +=
82 snprintf(intrnames + last_printed,
83 MAXCOMLEN + 1,
84 "irq%d: %s", irq, name);
85 last_printed++;
86 intrcnt_tab[irq] = intrcnt_index;
87 intrcnt_index++;
88
89 }
90 intr_event_add_handler(event, name, filt, hand, arg,
91 intr_priority(flags), flags, cookiep);
92 }
93
94 int
95 arm_remove_irqhandler(int irq, void *cookie)
96 {
97 struct intr_event *event;
98 int error;
99
100 event = intr_events[irq];
101 arm_mask_irq(irq);
102
103 error = intr_event_remove_handler(cookie);
104
105 if (!TAILQ_EMPTY(&event->ie_handlers))
106 arm_unmask_irq(irq);
107 return (error);
108 }
109
110 void dosoftints(void);
111 void
112 dosoftints(void)
113 {
114 }
115
116 void
117 arm_handler_execute(struct trapframe *frame, int irqnb)
118 {
119 struct intr_event *event;
120 int i;
121
122 PCPU_INC(cnt.v_intr);
123 while ((i = arm_get_next_irq()) != -1) {
124 intrcnt[intrcnt_tab[i]]++;
125 event = intr_events[i];
126 if (intr_event_handle(event, frame) != 0) {
127 /* XXX: Log stray IRQs */
128 arm_mask_irq(i);
129 }
130 }
131 }
132 Cache object: 72d3576ca866a321681bf48ea51bf036
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