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d47201cc4f
Many files: Fix the minos license so that it is usable for XP and BSD ports. minios.lds: Rename: extras/mini-os/vmlinux.lds -> extras/mini-os/minios.lds .del-list.h~d612a8726e8d42e: Delete: extras/mini-os/h/list.h .del-COPYING~1f9753354580bd13: Delete: extras/mini-os/COPYING
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
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****************************************************************************
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* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
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****************************************************************************
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*
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* File: events.c
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* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
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* Changes:
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*
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* Date: Jul 2003
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*
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* Environment: Xen Minimal OS
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* Description: Deal with events
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*
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****************************************************************************
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* $Id: c-insert.c,v 1.7 2002/11/08 16:04:34 rn Exp $
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****************************************************************************
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*/
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#include <os.h>
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#include <hypervisor.h>
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#include <events.h>
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#include <lib.h>
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static ev_action_t ev_actions[NR_EVS];
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void default_handler(int ev, struct pt_regs *regs);
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/*
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* demux events to different handlers
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*/
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unsigned int do_event(int ev, struct pt_regs *regs)
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{
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ev_action_t *action;
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if (ev >= NR_EVS) {
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printk("Large event number %d\n", ev);
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return 0;
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}
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action = &ev_actions[ev];
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action->count++;
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ack_hypervisor_event(ev);
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if (!action->handler)
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goto out;
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if (action->status & EVS_DISABLED)
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goto out;
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/* call the handler */
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action->handler(ev, regs);
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out:
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return 1;
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}
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/*
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* add a handler
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*/
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unsigned int add_ev_action( int ev, void (*handler)(int, struct pt_regs *) )
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{
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if (ev_actions[ev].handler) {
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printk ("event[%d] already handled by %p", ev, ev_actions[ev].handler);
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return 0;
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}
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ev_actions[ev].handler = handler;
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return 1;
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}
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unsigned int enable_ev_action( int ev )
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{
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if (!ev_actions[ev].handler) {
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printk ("enable event[%d], no handler installed", ev);
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return 0;
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}
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ev_actions[ev].status &= ~EVS_DISABLED;
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return 1;
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}
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unsigned int disable_ev_action( int ev )
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{
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ev_actions[ev].status |= EVS_DISABLED;
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return 1;
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}
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/*
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* initially all events are without a handler and disabled
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*/
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void init_events(void)
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{
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int i;
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/* inintialise event handler */
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for ( i = 0; i < NR_EVS; i++ )
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{
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ev_actions[i].status = EVS_DISABLED;
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ev_actions[i].handler = NULL;
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}
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}
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void default_handler(int ev, struct pt_regs *regs) {
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printk("X[%d] ", ev);
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}
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