1 /* $NetBSD: intr.h,v 1.31 2008/07/17 16:13:33 tsutsui Exp $ */ 2 3 /* 4 * Copyright (C) 1997 Scott Reynolds 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _MAC68K_INTR_H_ 31 #define _MAC68K_INTR_H_ 32 33 #include <machine/psl.h> 34 35 #ifdef _KERNEL 36 37 /* spl0 requires checking for software interrupts */ 38 39 #define IPL_NONE 0 40 #define IPL_SOFTCLOCK 1 41 #define IPL_SOFTBIO 2 42 #define IPL_SOFTNET 3 43 #define IPL_SOFTSERIAL 4 44 #define IPL_VM 5 45 #define IPL_SCHED 6 46 #define IPL_HIGH 7 47 #define NIPL 8 48 49 /* 50 * This array contains the appropriate PSL_S|PSL_IPL? values 51 * to raise interrupt priority to the requested level. 52 */ 53 extern uint16_t ipl2psl_table[NIPL]; 54 55 /* These spl calls are _not_ to be used by machine-independent code. */ 56 #define splzs() splserial() 57 58 /* 59 * These should be used for: 60 * 1) ensuring mutual exclusion (why use processor level?) 61 * 2) allowing faster devices to take priority 62 */ 63 64 /* watch out for side effects */ 65 #define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0()) 66 67 68 typedef int ipl_t; 69 typedef struct { 70 uint16_t _ipl; 71 } ipl_cookie_t; 72 73 static inline ipl_cookie_t 74 makeiplcookie(ipl_t ipl) 75 { 76 77 return (ipl_cookie_t){._ipl = ipl}; 78 } 79 80 static inline int 81 splraiseipl(ipl_cookie_t icookie) 82 { 83 84 return _splraise(ipl2psl_table[icookie._ipl]); 85 } 86 87 #include <sys/spl.h> 88 89 /* intr.c */ 90 void intr_init(void); 91 void intr_establish(int (*)(void *), void *, int); 92 void intr_disestablish(int); 93 void intr_dispatch(int); 94 95 /* locore.s */ 96 int spl0(void); 97 #endif /* _KERNEL */ 98 99 #endif /* _MAC68K_INTR_H_ */ 100