text: /*	$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
  
  /*
   * 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_SOFTSERIAL		3	/* for IPL_SOFTSERIAL */
  
  #define	SI_NQUEUES		4
  
  #define	SI_QUEUENAMES {							\
  	"generic",							\
  	"clock",							\
  	"net",								\
  	"serial",							\
  }
  
  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;
  	struct evcnt siq_evcnt;
  	int siq_si;
  };
  
  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;			\
  	int __s;							\
  									\
  	__s = splhigh();						\
  	if (__sih->sih_pending == 0) {					\
  		TAILQ_INSERT_TAIL(&__siq->siq_list, __sih, sih_list);	\
  		__sih->sih_pending = 1;					\
  		_setsoftintr(__siq->siq_si);				\
  	}								\
  	splx(__s);							\
  } while (/*CONSTCOND*/0)
  
  /* XXX For legacy software interrupts. */
  extern struct soft_intrhand *softnet_intrhand;
  
  #define	setsoftnet()	softintr_schedule(softnet_intrhand)
  
  #endif /* _KERNEL */
  
  #endif	/* _ARM_SOFTINTR_H_ */
  