/*
 * Copyright (c) 1996, 1998 University of Utah and the Flux Group.
 * All rights reserved.
 * 
 * This file is part of the Flux OSKit.  The OSKit is free software, also known
 * as "open source;" you can redistribute it and/or modify it under the terms
 * of the GNU General Public License (GPL), version 2, as published by the Free
 * Software Foundation (FSF).  To explore alternate licensing terms, contact
 * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
 * 
 * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
 * received a copy of the GPL along with the OSKit; see the file COPYING.  If
 * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
 */
/*
 * Simple "global critical section" implementation for panic, debugging, etc.
 * This implementation is for uniprocessors; for multiprocessors,
 * the SMP startup code in libsmp.a overrides it with a different version.
 */

#include <oskit/x86/proc_reg.h>

static unsigned entry_count;
static unsigned saved_eflags;

void base_critical_enter(void)
{
	if (entry_count == 0) {
		saved_eflags = get_eflags();
		cli();
	}
	entry_count++;
}

void base_critical_leave(void)
{
	if (--entry_count == 0) {
		set_eflags(saved_eflags);
	}
}