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/* $OpenBSD: softintr.h,v 1.5 2010/12/21 14:56:23 claudio Exp $ */
/* $NetBSD: softintr.h,v 1.1 2002/01/29 22:54:14 thorpej Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
#ifndef _ARM_SOFTINTR_H_
#define _ARM_SOFTINTR_H_
#ifdef _KERNEL
#include <sys/mutex.h>
/*
* Generic software interrupt support for all ARM platforms.
*
* To use this code, include <arm/softintr.h> from your platform's
* <machine/intr.h>.
*/
#define SI_SOFT 0 /* for IPL_SOFT */
#define SI_SOFTCLOCK 1 /* for IPL_SOFTCLOCK */
#define SI_SOFTNET 2 /* for IPL_SOFTNET */
#define SI_SOFTTTY 3 /* for IPL_SOFTTTY */
#define SI_NQUEUES 4
struct soft_intrhand {
TAILQ_ENTRY(soft_intrhand) sih_list;
void (*sih_func)(void *);
void *sih_arg;
struct soft_intrq *sih_siq;
int sih_pending;
};
struct soft_intrq {
TAILQ_HEAD(, soft_intrhand)
siq_list;
int siq_si;
struct mutex siq_mtx;
};
void *softintr_establish(int, void (*)(void *), void *);
void softintr_disestablish(void *);
void softintr_init(void);
void softintr_dispatch(int);
#define softintr_schedule(arg) \
do { \
struct soft_intrhand *__sih = (arg); \
struct soft_intrq *__siq = __sih->sih_siq; \
\
mtx_enter(&__siq->siq_mtx); \
if (__sih->sih_pending == 0) { \
TAILQ_INSERT_TAIL(&__siq->siq_list, __sih, sih_list); \
__sih->sih_pending = 1; \
_setsoftintr(__siq->siq_si); \
} \
mtx_leave(&__siq->siq_mtx); \
} while (/*CONSTCOND*/0)
#endif /* _KERNEL */
#endif /* _ARM_SOFTINTR_H_ */
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