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>
57 #include <machine/atomic.h>
58 #include <machine/bus.h>
59 #include <machine/intr.h>
60 #include <machine/cpu.h>
63 #include <dev/fdt/fdt_common.h>
64 #include <machine/fdt.h>
67 #define INTRNAME_LEN (MAXCOMLEN + 1)
69 typedef void (*mask_fn)(void *);
71 static struct intr_event *intr_events[NIRQ];
73 void intr_irq_handler(struct trapframe *);
75 void (*arm_post_filter)(void *) = NULL;
76 int (*arm_config_irq)(int irq, enum intr_trigger trig,
77 enum intr_polarity pol) = NULL;
79 /* Data for statistics reporting. */
81 char intrnames[(NIRQ * INTRNAME_LEN) + 1];
82 size_t sintrcnt = sizeof(intrcnt);
83 size_t sintrnames = sizeof(intrnames);
86 * Pre-format intrnames into an array of fixed-size strings containing spaces.
87 * This allows us to avoid the need for an intermediate table of indices into
88 * the names and counts arrays, while still meeting the requirements and
89 * assumptions of vmstat(8) and the kdb "show intrcnt" command, the two
90 * consumers of this data.
93 intr_init(void *unused)
97 for (i = 0; i < NIRQ; ++i) {
98 snprintf(&intrnames[i * INTRNAME_LEN], INTRNAME_LEN, "%-*s",
99 INTRNAME_LEN - 1, "");
103 SYSINIT(intr_init, SI_SUB_INTR, SI_ORDER_FIRST, intr_init, NULL);
107 intr_fdt_map_irq(phandle_t iparent, pcell_t *intr, int icells)
109 fdt_pic_decode_t intr_decode;
110 phandle_t intr_parent;
111 int i, rv, interrupt, trig, pol;
113 intr_parent = OF_node_from_xref(iparent);
114 for (i = 0; i < icells; i++)
115 intr[i] = cpu_to_fdt32(intr[i]);
117 for (i = 0; fdt_pic_table[i] != NULL; i++) {
118 intr_decode = fdt_pic_table[i];
119 rv = intr_decode(intr_parent, intr, &interrupt, &trig, &pol);
122 /* This was recognized as our PIC and decoded. */
123 interrupt = FDT_MAP_IRQ(intr_parent, interrupt);
128 /* Not in table, so guess */
129 interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0]));
136 arm_setup_irqhandler(const char *name, driver_filter_t *filt,
137 void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
139 struct intr_event *event;
142 if (irq < 0 || irq >= NIRQ)
144 event = intr_events[irq];
146 error = intr_event_create(&event, (void *)irq, 0, irq,
147 (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
148 arm_post_filter, NULL, "intr%d:", irq);
151 intr_events[irq] = event;
152 snprintf(&intrnames[irq * INTRNAME_LEN], INTRNAME_LEN,
153 "irq%d: %-*s", irq, INTRNAME_LEN - 1, name);
155 intr_event_add_handler(event, name, filt, hand, arg,
156 intr_priority(flags), flags, cookiep);
160 arm_remove_irqhandler(int irq, void *cookie)
162 struct intr_event *event;
165 event = intr_events[irq];
168 error = intr_event_remove_handler(cookie);
170 if (!TAILQ_EMPTY(&event->ie_handlers))
175 void dosoftints(void);
182 intr_irq_handler(struct trapframe *frame)
184 struct intr_event *event;
187 PCPU_INC(cnt.v_intr);
189 while ((i = arm_get_next_irq(i)) != -1) {
191 event = intr_events[i];
192 if (intr_event_handle(event, frame) != 0) {
193 /* XXX: Log stray IRQs */
198 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN))
199 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, frame);