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      1 /*	$NetBSD: evtchn.h,v 1.32 2020/05/07 19:48:58 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  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _XEN_EVENTS_H_
     30 #define _XEN_EVENTS_H_
     31 
     32 extern struct evtsource *evtsource[];
     33 
     34 void events_default_setup(void);
     35 void events_init(void);
     36 bool events_suspend(void);
     37 bool events_resume(void);
     38 
     39 unsigned int evtchn_do_event(int, struct intrframe *);
     40 void call_evtchn_do_event(int, struct intrframe *);
     41 void call_xenevt_event(int);
     42 struct intrhand *event_set_handler(int, int (*func)(void *), void *,
     43     int, const char *, const char *, bool, struct cpu_info *);
     44 int event_remove_handler(int, int (*func)(void *), void *);
     45 
     46 struct cpu_info;
     47 struct intrhand;
     48 
     49 extern int debug_port;
     50 extern int xen_debug_handler(void *);
     51 
     52 int bind_virq_to_evtch(int);
     53 int bind_pirq_to_evtch(int);
     54 int get_pirq_to_evtch(int);
     55 int unbind_pirq_from_evtch(int);
     56 int unbind_virq_from_evtch(int);
     57 
     58 evtchn_port_t bind_vcpu_to_evtch(cpuid_t);
     59 
     60 struct pintrhand {
     61 	/* See comments in x86/include/intr.h:struct intrhand {} */
     62 	struct pic *pic;
     63 	struct intrhand *ih;
     64 	int pirq;
     65 	int evtch;
     66 	int (*func)(void *);
     67 	void *arg;
     68 };
     69 
     70 struct pintrhand *pirq_establish(int, int, int (*)(void *), void *, int,
     71      const char *, const char *, bool);
     72 void pirq_disestablish(struct pintrhand *);
     73 
     74 #endif /*  _XEN_EVENTS_H_ */
     75