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/7.3/sys/arm/arm/intr.c 192409 2009-05-19 22:07:54Z jhb $");
   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
   63 arm_setup_irqhandler(const char *name, driver_filter_t *filt, 
   64     void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
   65 {
   66         struct intr_event *event;
   67         int error;
   68 
   69         if (irq < 0 || irq >= NIRQ)
   70                 return;
   71         event = intr_events[irq];
   72         if (event == NULL) {
   73                 error = intr_event_create(&event, (void *)irq, 0, irq,
   74                     (mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
   75                     NULL, NULL, "intr%d:", irq);
   76                 if (error)
   77                         return;
   78                 intr_events[irq] = event;
   79                 last_printed += 
   80                     snprintf(intrnames + last_printed,
   81                     MAXCOMLEN + 1,
   82                     "irq%d: %s", irq, name);
   83                 last_printed++;
   84                 intrcnt_tab[irq] = intrcnt_index;
   85                 intrcnt_index++;
   86                 
   87         }
   88         intr_event_add_handler(event, name, filt, hand, arg,
   89             intr_priority(flags), flags, cookiep);
   90 }
   91 
   92 int
   93 arm_remove_irqhandler(void *cookie)
   94 {
   95         return (intr_event_remove_handler(cookie));
   96 }
   97 
   98 void dosoftints(void);
   99 void
  100 dosoftints(void)
  101 {
  102 }
  103 
  104 void
  105 arm_handler_execute(struct trapframe *frame, int irqnb)
  106 {
  107         struct intr_event *event;
  108         struct thread *td = curthread;
  109         int i;
  110 
  111         PCPU_INC(cnt.v_intr);
  112         td->td_intr_nesting_level++;
  113         while ((i = arm_get_next_irq()) != -1) {
  114                 intrcnt[intrcnt_tab[i]]++;
  115                 event = intr_events[i];
  116                 if (intr_event_handle(event, frame) != 0) {
  117                         /* XXX: Log stray IRQs */
  118                         arm_mask_irq(i);
  119                 }
  120         }
  121         td->td_intr_nesting_level--;
  122 }

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

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