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evtchn.h revision 1.2 
      1 /*	$NetBSD: evtchn.h,v 1.2 2005/03/09 22:39:20 bouyer Exp $	*/
      2 
      3 /*
      4  *
      5  * Copyright (c) 2004 Christian Limpach.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Christian Limpach.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _XEN_EVENTS_H_
     35 #define _XEN_EVENTS_H_
     36 
     37 #define	NR_IRQS		32
     38 #define NR_PIRQS	32 /* XXX is this enouth ? */
     39 
     40 extern int evtchn_to_irq[];
     41 
     42 /* typedef unsigned int (*ev_handler_t)(int, struct pt_regs *); */
     43 typedef int (*ev_handler_t)(void *);
     44 
     45 void events_default_setup(void);
     46 void init_events(void);
     47 unsigned int do_event(int, struct intrframe *);
     48 int event_set_handler(int, ev_handler_t, void *, int);
     49 int event_remove_handler(int, ev_handler_t, void *);
     50 
     51 int bind_virq_to_irq(int);
     52 int bind_pirq_to_irq(int);
     53 void unbind_pirq_from_irq(int);
     54 void unbind_virq_from_irq(int);
     55 int bind_evtchn_to_irq(int);
     56 int unbind_evtchn_to_irq(int);
     57 
     58 struct pintrhand {
     59 	int pirq;
     60 	int irq;
     61 	int (*func)(void *);
     62 	void *arg;
     63 };
     64 
     65 struct pintrhand *pirq_establish(int, int, int (*)(void *), void *, int);
     66 
     67 #endif /*  _XEN_EVENTS_H_ */
     68