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/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
****************************************************************************
* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
****************************************************************************
*
* File: events.h
* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
* Changes:
*
* Date: Jul 2003
*
* Environment: Xen Minimal OS
* Description: deal with events
*
****************************************************************************
* $Id: h-insert.h,v 1.4 2002/11/08 16:03:55 rn Exp $
****************************************************************************
*/
#ifndef _EVENTS_H_
#define _EVENTS_H_
/* _EVENT_* are defined in hypervisor-if.h */
#define EV_BLKDEV _EVENT_BLKDEV
#define EV_TIMER _EVENT_TIMER
#define EV_DIE _EVENT_DIE
#define EV_DEBUG _EVENT_DEBUG
#define EV_NET _EVENT_NET
#define EV_PS2 _EVENT_PS2
#define NR_EVS (sizeof(HYPERVISOR_shared_info->events) * 8)
/* ev handler status */
#define EVS_INPROGRESS 1 /* Event handler active - do not enter! */
#define EVS_DISABLED 2 /* Event disabled - do not enter! */
#define EVS_PENDING 4 /* Event pending - replay on enable */
#define EVS_REPLAY 8 /* Event has been replayed but not acked yet */
/* this represents a event handler. Chaining or sharing is not allowed */
typedef struct _ev_action_t {
void (*handler)(int, struct pt_regs *);
unsigned int status; /* IRQ status */
u32 count;
} ev_action_t;
/* prototypes */
unsigned int do_event(int ev, struct pt_regs *regs);
unsigned int add_ev_action( int ev, void (*handler)(int, struct pt_regs *) );
unsigned int enable_ev_action( int ev );
unsigned int disable_ev_action( int ev );
void init_events(void);
#endif /* _EVENTS_H_ */
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