1 /* $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $ */
4 * Copyright (c) 2004 Olivier Houchard.
5 * Copyright (c) 1994-1998 Mark Brinicombe.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * Soft interrupt and other generic interrupt functions.
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/syslog.h>
44 #include <sys/malloc.h>
47 #include <sys/interrupt.h>
49 #include <machine/atomic.h>
50 #include <machine/intr.h>
51 #include <machine/cpu.h>
53 #define INTRNAME_LEN (MAXCOMLEN + 1)
55 typedef void (*mask_fn)(void *);
57 static struct intr_event *intr_events[NIRQ];
59 void arm_handler_execute(struct trapframe *, int);
61 void (*arm_post_filter)(void *) = NULL;
64 * Pre-format intrnames into an array of fixed-size strings containing spaces.
65 * This allows us to avoid the need for an intermediate table of indices into
66 * the names and counts arrays, while still meeting the requirements and
67 * assumptions of vmstat(8) and the kdb "show intrcnt" command, the two
68 * consumers of this data.
71 arm_intrnames_init(void)
75 for (i = 0; i < NIRQ; ++i) {
76 snprintf(&intrnames[i * INTRNAME_LEN], INTRNAME_LEN, "%-*s",
77 INTRNAME_LEN - 1, "");
82 arm_setup_irqhandler(const char *name, driver_filter_t *filt,
83 void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
85 struct intr_event *event;
88 if (irq < 0 || irq >= NIRQ)
90 event = intr_events[irq];
92 error = intr_event_create(&event, (void *)irq, 0, irq,
93 (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
94 arm_post_filter, NULL, "intr%d:", irq);
97 intr_events[irq] = event;
98 snprintf(&intrnames[irq * INTRNAME_LEN], INTRNAME_LEN,
99 "irq%d: %-*s", irq, INTRNAME_LEN - 1, name);
101 intr_event_add_handler(event, name, filt, hand, arg,
102 intr_priority(flags), flags, cookiep);
106 arm_remove_irqhandler(int irq, void *cookie)
108 struct intr_event *event;
111 event = intr_events[irq];
114 error = intr_event_remove_handler(cookie);
116 if (!TAILQ_EMPTY(&event->ie_handlers))
121 void dosoftints(void);
128 arm_handler_execute(struct trapframe *frame, int irqnb)
130 struct intr_event *event;
133 PCPU_INC(cnt.v_intr);
135 while ((i = arm_get_next_irq(i)) != -1) {
137 event = intr_events[i];
138 if (intr_event_handle(event, frame) != 0) {
139 /* XXX: Log stray IRQs */