FreeBSD/Linux Kernel Cross Reference
sys/arm/sa11x0/sa11x0_irqhandler.c

     /*      $NetBSD: sa11x0_irqhandler.c,v 1.5 2003/08/07 16:26:54 agc Exp $        */
     
     /*-
      * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to the NetBSD Foundation
      * by IWAMOTO Toshihiro.
      *
     * This code is derived from software contributed to The NetBSD Foundation
     * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
     * Simulation Facility, NASA Ames Research Center.
     *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION 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.
     */
    
    /*-
     * Copyright (c) 1991 The Regents of the University of California.
     * All rights reserved.
     *
     * This code is derived from software contributed to Berkeley by
     * William Jolitz.
     *
     * 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. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
     *
     *      @(#)isa.c       7.2 (Berkeley) 5/13/91
     */
    
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.0/sys/arm/sa11x0/sa11x0_irqhandler.c 203974 2010-02-16 21:59:17Z imp $");
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/syslog.h>
    #include <sys/malloc.h>
    #include <sys/bus.h>
    #include <sys/interrupt.h>
    #include <sys/rman.h>
    
    #include <vm/vm.h>
    #include <vm/vm_extern.h>
    
    #include <arm/sa11x0/sa11x0_reg.h>
    #include <arm/sa11x0/sa11x0_var.h>
    
    #include <machine/cpu.h>
    #include <machine/intr.h>
    
    #define NIRQS 0x20
    struct intrhand *irqhandlers[NIRQS];
    
    int current_intr_depth;
    extern struct sa11x0_softc *sa11x0_softc;
    
    
    static uint32_t sa11x0_irq_mask = 0xfffffff;
   
   extern vm_offset_t saipic_base;
   
   int
   arm_get_next_irq(int last __unused)
   {
           int irq;
   
           if ((irq = (bus_space_read_4(sa11x0_softc->sc_iot, sa11x0_softc->sc_ioh,
               SAIPIC_IP) &
               sa11x0_irq_mask)) != 0)
                   return (ffs(irq) - 1);
           return (-1);
   }
   
   void
   arm_mask_irq(uintptr_t irq)
   {
   
           sa11x0_irq_mask &= ~(1 << irq);
           __asm __volatile("str   %0, [%1, #0x04]" /* SAIPIC_MR */
               : : "r" (sa11x0_irq_mask), "r" (saipic_base));
   }
   
   void
   arm_unmask_irq(uintptr_t irq)
   {
   
           sa11x0_irq_mask |= (1 << irq);
           __asm __volatile("str   %0, [%1, #0x04]" /* SAIPIC_MR */
               : : "r" (sa11x0_irq_mask), "r" (saipic_base));
   }
   
   void stray_irqhandler(void *);
   
   
   
   void
   stray_irqhandler(void *p)
   {
   
           printf("stray interrupt %p\n", p);
   }
   /* End of irqhandler.c */

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