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@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