The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/intr.c

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    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: releng/8.1/sys/arm/arm/intr.c 193847 2009-06-09 18:18:41Z marcel $");
   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         i = -1;
  124         while ((i = arm_get_next_irq(i)) != -1) {
  125                 intrcnt[intrcnt_tab[i]]++;
  126                 event = intr_events[i];
  127                 if (intr_event_handle(event, frame) != 0) {
  128                         /* XXX: Log stray IRQs */
  129                         arm_mask_irq(i);
  130                 }
  131         }
  132 }

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