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/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
****************************************************************************
* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
* (C) 2005 - Grzegorz Milos - Intel Reseach Cambridge
****************************************************************************
*
* File: events.h
* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
* Changes: Grzegorz Milos (gm281@cam.ac.uk)
*
* Date: Jul 2003, changes Jun 2005
*
* Environment: Xen Minimal OS
* Description: Deals with events on the event channels
*
****************************************************************************
*/
#ifndef _EVENTS_H_
#define _EVENTS_H_
#include<traps.h>
#include <xen/event_channel.h>
#define NR_EVS 1024
/* 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 */
int do_event(u32 port, struct pt_regs *regs);
int bind_virq( u32 virq, void (*handler)(int, struct pt_regs *) );
void bind_evtchn( u32 virq, void (*handler)(int, struct pt_regs *) );
void init_events(void);
static inline int notify_via_evtchn(int port)
{
evtchn_op_t op;
op.cmd = EVTCHNOP_send;
op.u.send.local_port = port;
return HYPERVISOR_event_channel_op(&op);
}
#endif /* _EVENTS_H_ */
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