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intr.h revision 1.2 
      1 /* $NetBSD: intr.h,v 1.2 2009/10/21 16:06:59 snj 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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _ARCH_USERMODE_INCLUDE_INTR_H
     30 #define _ARCH_USERMODE_INCLUDE_INTR_H
     31 
     32 #include <machine/intrdefs.h>
     33 
     34 __inline static int
     35 splraise(int x)
     36 {
     37 	extern int usermode_x;
     38 	int oldx = usermode_x;
     39 
     40 	usermode_x = x;
     41 
     42 	return oldx;
     43 }
     44 
     45 __inline static void
     46 spllower(int x)
     47 {
     48 	extern int usermode_x;
     49 
     50 	usermode_x = x;
     51 }
     52 
     53 #define	spl0()		spllower(IPL_NONE)
     54 #define splx(x)		spllower(x)
     55 
     56 typedef uint8_t	ipl_t;
     57 typedef struct {
     58 	ipl_t _ipl;
     59 } ipl_cookie_t;
     60 
     61 static inline ipl_cookie_t
     62 makeiplcookie(ipl_t ipl)
     63 {
     64 	return (ipl_cookie_t){._ipl = ipl};
     65 }
     66 
     67 static inline int
     68 splraiseipl(ipl_cookie_t icookie)
     69 {
     70 	return splraise(icookie._ipl);
     71 }
     72 
     73 #include <sys/spl.h>
     74 
     75 #endif /* !_ARCH_USERMODE_INCLUDE_INTR_H */
     76