1 /* $OpenBSD: softintr.h,v 1.3 2009/04/08 21:19:30 kettenis Exp $ */ 2 /* $NetBSD: softintr.h,v 1.1 2002/01/29 22:54:14 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 2001 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _ARM_SOFTINTR_H_ 40 #define _ARM_SOFTINTR_H_ 41 42 #ifdef _KERNEL 43 44 /* 45 * Generic software interrupt support for all ARM platforms. 46 * 47 * To use this code, include <arm/softintr.h> from your platform's 48 * <machine/intr.h>. 49 */ 50 51 #define SI_SOFT 0 /* for IPL_SOFT */ 52 #define SI_SOFTCLOCK 1 /* for IPL_SOFTCLOCK */ 53 #define SI_SOFTNET 2 /* for IPL_SOFTNET */ 54 #define SI_SOFTTTY 3 /* for IPL_SOFTTTY */ 55 56 #define SI_NQUEUES 4 57 58 struct soft_intrhand { 59 TAILQ_ENTRY(soft_intrhand) sih_list; 60 void (*sih_func)(void *); 61 void *sih_arg; 62 struct soft_intrq *sih_siq; 63 int sih_pending; 64 }; 65 66 struct soft_intrq { 67 TAILQ_HEAD(, soft_intrhand) siq_list; 68 int siq_si; 69 }; 70 71 void *softintr_establish(int, void (*)(void *), void *); 72 void softintr_disestablish(void *); 73 void softintr_init(void); 74 void softintr_dispatch(int); 75 76 #define softintr_schedule(arg) \ 77 do { \ 78 struct soft_intrhand *__sih = (arg); \ 79 struct soft_intrq *__siq = __sih->sih_siq; \ 80 int __s; \ 81 \ 82 __s = splhigh(); \ 83 if (__sih->sih_pending == 0) { \ 84 TAILQ_INSERT_TAIL(&__siq->siq_list, __sih, sih_list); \ 85 __sih->sih_pending = 1; \ 86 _setsoftintr(__siq->siq_si); \ 87 } \ 88 splx(__s); \ 89 } while (/*CONSTCOND*/0) 90 91 /* XXX For legacy software interrupts. */ 92 extern struct soft_intrhand *softnet_intrhand; 93 94 #define setsoftnet() softintr_schedule(softnet_intrhand) 95 96 #endif /* _KERNEL */ 97 98 #endif /* _ARM_SOFTINTR_H_ */ 99