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evtchn.h revision 1.30 
      1 /*	$NetBSD: evtchn.h,v 1.30 2020/04/25 15:26:17 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 #define NR_PIRQS	256
     33 
     34 extern struct evtsource *evtsource[];
     35 
     36 void events_default_setup(void);
     37 void events_init(void);
     38 bool events_suspend(void);
     39 bool events_resume(void);
     40 
     41 unsigned int evtchn_do_event(int, struct intrframe *);
     42 void call_evtchn_do_event(int, struct intrframe *);
     43 void call_xenevt_event(int);
     44 struct intrhand *event_set_handler(int, int (*func)(void *), void *,
     45     int, const char *, const char *, bool, bool);
     46 int event_remove_handler(int, int (*func)(void *), void *);
     47 
     48 struct cpu_info;
     49 struct intrhand;
     50 void event_set_iplhandler(struct cpu_info *, struct intrhand *, int);
     51 
     52 extern int debug_port;
     53 extern int xen_debug_handler(void *);
     54 
     55 int bind_virq_to_evtch(int);
     56 int bind_pirq_to_evtch(int);
     57 int get_pirq_to_evtch(int);
     58 int unbind_pirq_from_evtch(int);
     59 int unbind_virq_from_evtch(int);
     60 
     61 evtchn_port_t bind_vcpu_to_evtch(cpuid_t);
     62 
     63 struct pintrhand {
     64 	/* See comments in x86/include/intr.h:struct intrhand {} */
     65 	struct pic *pic;
     66 	struct intrhand *ih;
     67 	int pirq;
     68 	int evtch;
     69 	int (*func)(void *);
     70 	void *arg;
     71 };
     72 
     73 struct pintrhand *pirq_establish(int, int, int (*)(void *), void *, int,
     74      const char *, const char *, bool);
     75 void pirq_disestablish(struct pintrhand *);
     76 
     77 #endif /*  _XEN_EVENTS_H_ */
     78