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intr.h revision 1.1.4.2 
      1 /* $NetBSD: intr.h,v 1.1.4.2 2008/01/09 01:49:24 matt Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *        This product includes software developed by Jared D. McNeill.
     18  * 4. Neither the name of The NetBSD Foundation nor the names of its
     19  *    contributors may be used to endorse or promote products derived
     20  *    from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     32  * POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #ifndef _ARCH_USERMODE_INCLUDE_INTR_H
     36 #define _ARCH_USERMODE_INCLUDE_INTR_H
     37 
     38 #include <machine/intrdefs.h>
     39 
     40 __inline static int
     41 splraise(int x)
     42 {
     43 	extern int usermode_x;
     44 	int oldx = usermode_x;
     45 
     46 	usermode_x = x;
     47 
     48 	return oldx;
     49 }
     50 
     51 __inline static void
     52 spllower(int x)
     53 {
     54 	extern int usermode_x;
     55 
     56 	usermode_x = x;
     57 }
     58 
     59 #define	spl0()		spllower(IPL_NONE)
     60 #define splx(x)		spllower(x)
     61 
     62 typedef uint8_t	ipl_t;
     63 typedef struct {
     64 	ipl_t _ipl;
     65 } ipl_cookie_t;
     66 
     67 static inline ipl_cookie_t
     68 makeiplcookie(ipl_t ipl)
     69 {
     70 	return (ipl_cookie_t){._ipl = ipl};
     71 }
     72 
     73 static inline int
     74 splraiseipl(ipl_cookie_t icookie)
     75 {
     76 	return splraise(icookie._ipl);
     77 }
     78 
     79 #include <sys/spl.h>
     80 
     81 #endif /* !_ARCH_USERMODE_INCLUDE_INTR_H */
     82