1/* $NetBSD: intr.h,v 1.30 2008/06/19 13:56:22 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 */ 53extern 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 68typedef int ipl_t; 69typedef struct { 70 uint16_t _ipl; 71} ipl_cookie_t; 72 73static inline ipl_cookie_t 74makeiplcookie(ipl_t ipl) 75{ 76 77 return (ipl_cookie_t){._ipl = ipl}; 78} 79 80static inline int 81splraiseipl(ipl_cookie_t icookie) 82{ 83 84 return _splraise(ipl2psl_table[icookie._ipl]); 85} 86 87#include <sys/spl.h> 88 89/* intr.c */ 90void intr_init(void); 91void intr_establish(int (*)(void *), void *, int); 92void intr_disestablish(int); 93void intr_dispatch(int); 94 95/* locore.s */ 96int spl0(void); 97#endif /* _KERNEL */ 98 99#endif /* _MAC68K_INTR_H_ */ 100