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 "opt_platform.h"
40 #include "opt_hwpmc_hooks.h"
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/syslog.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
52 #include <sys/interrupt.h>
55 #include <sys/pmckern.h>
56 #include <sys/vmmeter.h>
58 #include <machine/atomic.h>
59 #include <machine/bus.h>
60 #include <machine/intr.h>
61 #include <machine/cpu.h>
64 #include <dev/fdt/fdt_common.h>
65 #include <machine/fdt.h>
68 #define INTRNAME_LEN (MAXCOMLEN + 1)
70 typedef void (*mask_fn)(void *);
72 static struct intr_event *intr_events[NIRQ];
74 void intr_irq_handler(struct trapframe *);
76 void (*arm_post_filter)(void *) = NULL;
77 int (*arm_config_irq)(int irq, enum intr_trigger trig,
78 enum intr_polarity pol) = NULL;
80 /* Data for statistics reporting. */
82 char intrnames[(NIRQ * INTRNAME_LEN) + 1];
83 size_t sintrcnt = sizeof(intrcnt);
84 size_t sintrnames = sizeof(intrnames);
87 * Pre-format intrnames into an array of fixed-size strings containing spaces.
88 * This allows us to avoid the need for an intermediate table of indices into
89 * the names and counts arrays, while still meeting the requirements and
90 * assumptions of vmstat(8) and the kdb "show intrcnt" command, the two
91 * consumers of this data.
94 intr_init(void *unused)
98 for (i = 0; i < NIRQ; ++i) {
99 snprintf(&intrnames[i * INTRNAME_LEN], INTRNAME_LEN, "%-*s",
100 INTRNAME_LEN - 1, "");
104 SYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL);
108 intr_fdt_map_irq(phandle_t iparent, pcell_t *intr, int icells)
110 fdt_pic_decode_t intr_decode;
111 phandle_t intr_parent;
112 int i, rv, interrupt, trig, pol;
114 intr_parent = OF_node_from_xref(iparent);
115 for (i = 0; i < icells; i++)
116 intr[i] = cpu_to_fdt32(intr[i]);
118 for (i = 0; fdt_pic_table[i] != NULL; i++) {
119 intr_decode = fdt_pic_table[i];
120 rv = intr_decode(intr_parent, intr, &interrupt, &trig, &pol);
123 /* This was recognized as our PIC and decoded. */
124 interrupt = FDT_MAP_IRQ(intr_parent, interrupt);
129 /* Not in table, so guess */
130 interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0]));
137 arm_setup_irqhandler(const char *name, driver_filter_t *filt,
138 void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
140 struct intr_event *event;
143 if (irq < 0 || irq >= NIRQ)
145 event = intr_events[irq];
147 error = intr_event_create(&event, (void *)irq, 0, irq,
148 (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
149 arm_post_filter, NULL, "intr%d:", irq);
152 intr_events[irq] = event;
153 snprintf(&intrnames[irq * INTRNAME_LEN], INTRNAME_LEN,
154 "irq%d: %-*s", irq, INTRNAME_LEN - 1, name);
156 intr_event_add_handler(event, name, filt, hand, arg,
157 intr_priority(flags), flags, cookiep);
161 arm_remove_irqhandler(int irq, void *cookie)
163 struct intr_event *event;
166 event = intr_events[irq];
169 error = intr_event_remove_handler(cookie);
171 if (!TAILQ_EMPTY(&event->ie_handlers))
176 void dosoftints(void);
183 intr_irq_handler(struct trapframe *frame)
185 struct intr_event *event;
190 while ((i = arm_get_next_irq(i)) != -1) {
192 event = intr_events[i];
193 if (intr_event_handle(event, frame) != 0) {
194 /* XXX: Log stray IRQs */
199 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN))
200 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, frame);