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kern_softint.c revision 1.2 
      1 /*	$NetBSD: kern_softint.c,v 1.2 2007/10/08 15:51:03 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Stub for code to be merged from the vmlocking CVS branch.
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: kern_softint.c,v 1.2 2007/10/08 15:51:03 ad Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/intr.h>
     48 
     49 /*
     50  * softint_init:
     51  *
     52  *	Initialize per-CPU data structures.  Called from mi_cpu_attach().
     53  */
     54 void
     55 softint_init(struct cpu_info *ci)
     56 {
     57 
     58 	/* nothing yet */
     59 }
     60 
     61 /*
     62  * softint_establish:
     63  *
     64  *	Register a software interrupt handler.
     65  */
     66 void *
     67 softint_establish(u_int flags, void (*func)(void *), void *arg)
     68 {
     69 	u_int level;
     70 
     71 	level = (flags & SOFTINT_LVLMASK);
     72 	KASSERT(level < SOFTINT_COUNT);
     73 
     74 	switch (level) {
     75 	case SOFTINT_CLOCK:
     76 		level = IPL_SOFTCLOCK;
     77 		break;
     78 	case SOFTINT_NET:
     79 	case SOFTINT_BIO:
     80 		level = IPL_SOFTNET;
     81 		break;
     82 	case SOFTINT_SERIAL:
     83 #ifdef IPL_SOFTSERIAL
     84 		level = IPL_SOFTSERIAL;
     85 #else
     86 		level = IPL_SOFTNET;
     87 #endif
     88 		break;
     89 	default:
     90 		panic("softint_establish");
     91 	}
     92 
     93 	return softintr_establish(level, func, arg);
     94 }
     95 
     96 /*
     97  * softint_disestablish:
     98  *
     99  *	Unregister a software interrupt handler.
    100  */
    101 void
    102 softint_disestablish(void *arg)
    103 {
    104 
    105 	softintr_disestablish(arg);
    106 }
    107 
    108 /*
    109  * softint_schedule:
    110  *
    111  *	Trigger a software interrupt.  Must be called from a hardware
    112  *	interrupt handler, or with preemption disabled (since we are
    113  *	using the value of curcpu()).
    114  */
    115 void
    116 softint_schedule(void *arg)
    117 {
    118 
    119 	softintr_schedule(arg);
    120 }
    121 
    122 /*
    123  * softint_block:
    124  *
    125  *	Update statistics when the soft interrupt blocks.
    126  */
    127 void
    128 softint_block(lwp_t *l)
    129 {
    130 
    131 	/* nothing yet */
    132 }
    133