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

     /*      $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $  */
     
     /*-
      * Copyright (c) 2004 Olivier Houchard.
      * Copyright (c) 1994-1998 Mark Brinicombe.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Mark Brinicombe
     *      for the NetBSD Project.
     * 4. The name of the company nor the name of the author may be used to
     *    endorse or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * Soft interrupt and other generic interrupt functions.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/6.0/sys/arm/arm/intr.c 147166 2005-06-09 12:26:20Z cognet $");
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/syslog.h> 
    #include <sys/malloc.h>
    #include <sys/proc.h>
    #include <sys/bus.h>
    #include <sys/interrupt.h>
    #include <sys/conf.h>
    #include <machine/atomic.h>
    #include <machine/intr.h>
    #include <machine/cpu.h>
    
    static struct ithd *ithreads[NIRQ];
    static int intrcnt_tab[NIRQ];
    static int intrcnt_index = 0;
    static int last_printed = 0;
    
    void    arm_handler_execute(void *, int);
    
    void
    arm_setup_irqhandler(const char *name, void (*hand)(void*), void *arg, 
        int irq, int flags, void **cookiep)
    {
            struct ithd *cur_ith;
            int error;
    
            if (irq < 0 || irq >= NIRQ)
                    return;
            cur_ith = ithreads[irq];
            if (cur_ith == NULL) {
                    error = ithread_create(&cur_ith, irq, 0, arm_mask_irq,
                        arm_unmask_irq, "intr%d:", irq);
                    if (error)
                            return;
                    ithreads[irq] = cur_ith;
                    last_printed += 
                        snprintf(intrnames + last_printed,
                        MAXCOMLEN + 1,
                        "irq%d: %s", irq, name);
                    last_printed++;
                    intrcnt_tab[irq] = intrcnt_index;
                    intrcnt_index++;
                    
            }
            ithread_add_handler(cur_ith, name, hand, arg, 
                ithread_priority(flags), flags, cookiep);
    }
    
    int
    arm_remove_irqhandler(void *cookie)
    {
            return (ithread_remove_handler(cookie));
    }
    
    void dosoftints(void);
    void
    dosoftints(void)
    {
    }
   
   void
   arm_handler_execute(void *frame, int irqnb)
   {
           struct ithd *ithd;
           int i;
           struct intrhand *ih;
           struct thread *td = curthread;
   
           td->td_intr_nesting_level++;
           while ((i = arm_get_next_irq()) != -1) {
                   intrcnt[intrcnt_tab[i]]++;
                   ithd = ithreads[i];
                   if (!ithd)
                           continue;
                   ih = TAILQ_FIRST(&ithd->it_handlers);
                   if (ih && ih->ih_flags & IH_FAST) {
                           TAILQ_FOREACH(ih, &ithd->it_handlers,
                               ih_next) {
                                   ih->ih_handler(ih->ih_argument ?
                                       ih->ih_argument : frame);
                           }
                   } else if (ih) {
                           arm_mask_irq(i);
                           ithread_schedule(ithd);
                   }
           }
           td->td_intr_nesting_level--;
   }

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