xref: /src/sys/arch/usermode/include/intr.h

/* $NetBSD: intr.h,v 1.1.4.2 2008/01/09 01:49:24 matt Exp $ */

/*-
 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by Jared D. McNeill.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _ARCH_USERMODE_INCLUDE_INTR_H
#define _ARCH_USERMODE_INCLUDE_INTR_H

#include <machine/intrdefs.h>

__inline static int
splraise(int x)
{
	extern int usermode_x;
	int oldx = usermode_x;

	usermode_x = x;

	return oldx;
}

__inline static void
spllower(int x)
{
	extern int usermode_x;

	usermode_x = x;
}

#define	spl0()		spllower(IPL_NONE)
#define splx(x)		spllower(x)

typedef uint8_t	ipl_t;
typedef struct {
	ipl_t _ipl;
} ipl_cookie_t;

static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)
{
	return (ipl_cookie_t){._ipl = ipl};
}

static inline int
splraiseipl(ipl_cookie_t icookie)
{
	return splraise(icookie._ipl);
}

#include <sys/spl.h>

#endif /* !_ARCH_USERMODE_INCLUDE_INTR_H */