intr_machdep.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (c) 1991 The Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * William Jolitz.
    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  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 /*-
   33  * Copyright (c) 2002 Benno Rice.
   34  * All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   55  * SUCH DAMAGE.
   56  *
   57  *      from: @(#)isa.c 7.2 (Berkeley) 5/13/91
   58  *      form: src/sys/i386/isa/intr_machdep.c,v 1.57 2001/07/20
   59  *
   60  * $FreeBSD: releng/7.3/sys/powerpc/powerpc/intr_machdep.c 192409 2009-05-19 22:07:54Z jhb $
   61  */
   62 
   63 #include <sys/param.h>
   64 #include <sys/systm.h>
   65 #include <sys/kernel.h>
   66 #include <sys/queue.h>
   67 #include <sys/bus.h>
   68 #include <sys/interrupt.h>
   69 #include <sys/ktr.h>
   70 #include <sys/lock.h>
   71 #include <sys/malloc.h>
   72 #include <sys/mutex.h>
   73 #include <sys/pcpu.h>
   74 #include <sys/syslog.h>
   75 #include <sys/vmmeter.h>
   76 #include <sys/proc.h>
   77 
   78 #include <machine/frame.h>
   79 #include <machine/intr_machdep.h>
   80 #include <machine/md_var.h>
   81 #include <machine/trap.h>
   82 
   83 #include "pic_if.h"
   84 
   85 #define MAX_STRAY_LOG   5
   86 
   87 MALLOC_DEFINE(M_INTR, "intr", "interrupt handler data");
   88 
   89 struct powerpc_intr {
   90         struct intr_event *event;
   91         long    *cntp;
   92         u_int   irq;
   93 };
   94 
   95 static struct powerpc_intr *powerpc_intrs[INTR_VECTORS];
   96 static u_int nvectors;          /* Allocated vectors */
   97 static u_int stray_count;
   98 
   99 device_t pic;
  100 
  101 static void
  102 intrcnt_setname(const char *name, int index)
  103 {
  104         snprintf(intrnames + (MAXCOMLEN + 1) * index, MAXCOMLEN + 1, "%-*s",
  105             MAXCOMLEN, name);
  106 }
  107 
  108 static void
  109 powerpc_intr_eoi(void *arg)
  110 {
  111         u_int irq = (uintptr_t)arg;
  112 
  113         PIC_EOI(pic, irq);
  114 }
  115 
  116 static void
  117 powerpc_intr_mask(void *arg)
  118 {
  119         u_int irq = (uintptr_t)arg;
  120 
  121         PIC_MASK(pic, irq);
  122 }
  123 
  124 static void
  125 powerpc_intr_unmask(void *arg)
  126 {
  127         u_int irq = (uintptr_t)arg;
  128 
  129         PIC_UNMASK(pic, irq);
  130 }
  131 
  132 void
  133 powerpc_register_pic(device_t dev)
  134 {
  135 
  136         pic = dev;
  137 }
  138 
  139 int
  140 powerpc_enable_intr(void)
  141 {
  142         struct powerpc_intr *i;
  143         int vector;
  144 
  145         for (vector = 0; vector < nvectors; vector++) {
  146                 i = powerpc_intrs[vector];
  147                 if (i == NULL)
  148                         continue;
  149 
  150                 PIC_ENABLE(pic, i->irq, vector);
  151         }
  152 
  153         return (0);
  154 }
  155 
  156 int
  157 powerpc_setup_intr(const char *name, u_int irq, driver_filter_t filter, 
  158     driver_intr_t handler, void *arg, enum intr_type flags, void **cookiep)
  159 {
  160         struct powerpc_intr *i;
  161         u_int vector;
  162         int error;
  163 
  164         /* XXX lock */
  165 
  166         i = NULL;
  167         for (vector = 0; vector < nvectors; vector++) {
  168                 i = powerpc_intrs[vector];
  169                 if (i == NULL)
  170                         continue;
  171                 if (i->irq == irq)
  172                         break;
  173                 i = NULL;
  174         }
  175 
  176         if (i == NULL) {
  177                 if (nvectors >= INTR_VECTORS) {
  178                         /* XXX unlock */
  179                         return (ENOENT);
  180                 }
  181 
  182                 i = malloc(sizeof(*i), M_INTR, M_NOWAIT);
  183                 if (i == NULL) {
  184                         /* XXX unlock */
  185                         return (ENOMEM);
  186                 }
  187                 error = intr_event_create(&i->event, (void *)irq, 0, irq,
  188                     powerpc_intr_mask, powerpc_intr_unmask, powerpc_intr_eoi,
  189                     NULL, "irq%u:", irq);
  190                 if (error) {
  191                         /* XXX unlock */
  192                         free(i, M_INTR);
  193                         return (error);
  194                 }
  195 
  196                 vector = nvectors++;
  197                 powerpc_intrs[vector] = i;
  198 
  199                 i->irq = irq;
  200 
  201                 /* XXX unlock */
  202 
  203                 i->cntp = &intrcnt[vector];
  204                 intrcnt_setname(i->event->ie_fullname, vector);
  205 
  206                 if (!cold)
  207                         PIC_ENABLE(pic, i->irq, vector);
  208         } else {
  209                 /* XXX unlock */
  210         }
  211 
  212         error = intr_event_add_handler(i->event, name, filter, handler, arg,
  213             intr_priority(flags), flags, cookiep);
  214         if (!error)
  215                 intrcnt_setname(i->event->ie_fullname, vector);
  216         return (error);
  217 }
  218 
  219 int
  220 powerpc_teardown_intr(void *cookie)
  221 {
  222 
  223         return (intr_event_remove_handler(cookie));
  224 }
  225 
  226 void
  227 powerpc_dispatch_intr(u_int vector, struct trapframe *tf)
  228 {
  229         struct powerpc_intr *i;
  230         struct intr_event *ie;
  231 
  232         i = powerpc_intrs[vector];
  233         if (i == NULL)
  234                 goto stray;
  235 
  236         (*i->cntp)++;
  237 
  238         ie = i->event;
  239         KASSERT(ie != NULL, ("%s: interrupt without an event", __func__));
  240 
  241         if (intr_event_handle(ie, tf) != 0) {
  242                 goto stray;
  243         }
  244         return;
  245 
  246 stray:
  247         stray_count++;
  248         if (stray_count <= MAX_STRAY_LOG) {
  249                 printf("stray irq %d\n", i ? i->irq : -1);
  250                 if (stray_count >= MAX_STRAY_LOG) {
  251                         printf("got %d stray interrupts, not logging anymore\n",
  252                             MAX_STRAY_LOG);
  253                 }
  254         }
  255         if (i != NULL)
  256                 PIC_MASK(pic, i->irq);
  257 }

Cache object: eb2bf3c7bc31343cc88fa2fdff9a1ec1

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/powerpc/powerpc/intr_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/intr_machdep.c