1 /* $NetBSD: intr.h,v 1.33 2024/02/28 13:05:40 thorpej 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 #if defined(_KERNEL) || defined(_KMEMUSER) 36 typedef struct { 37 uint16_t _ipl; 38 } ipl_cookie_t; 39 #endif 40 41 #ifdef _KERNEL 42 43 /* spl0 requires checking for software interrupts */ 44 45 #define IPL_NONE 0 46 #define IPL_SOFTCLOCK 1 47 #define IPL_SOFTBIO 2 48 #define IPL_SOFTNET 3 49 #define IPL_SOFTSERIAL 4 50 #define IPL_VM 5 51 #define IPL_SCHED 6 52 #define IPL_HIGH 7 53 #define NIPL 8 54 55 /* 56 * This array contains the appropriate PSL_S|PSL_IPL? values 57 * to raise interrupt priority to the requested level. 58 */ 59 extern uint16_t ipl2psl_table[NIPL]; 60 61 /* These spl calls are _not_ to be used by machine-independent code. */ 62 #define splzs() splserial() 63 64 /* 65 * These should be used for: 66 * 1) ensuring mutual exclusion (why use processor level?) 67 * 2) allowing faster devices to take priority 68 */ 69 70 /* watch out for side effects */ 71 #define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0()) 72 73 74 typedef int ipl_t; 75 76 static inline ipl_cookie_t 77 makeiplcookie(ipl_t ipl) 78 { 79 80 return (ipl_cookie_t){._ipl = ipl}; 81 } 82 83 static inline int 84 splraiseipl(ipl_cookie_t icookie) 85 { 86 87 return _splraise(ipl2psl_table[icookie._ipl]); 88 } 89 90 #include <sys/spl.h> 91 92 /* intr.c */ 93 struct clockframe; 94 void intr_init(void); 95 void intr_establish(int (*)(void *), void *, int); 96 void intr_disestablish(int); 97 void intr_dispatch(struct clockframe); 98 99 /* locore.s */ 100 int spl0(void); 101 #endif /* _KERNEL */ 102 103 #endif /* _MAC68K_INTR_H_ */ 104