intr.h revision 1.28
1/* $NetBSD: intr.h,v 1.28 2000/06/05 21:47:19 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS 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/* 40 * Copyright (c) 1997 Christopher G. Demetriou. All rights reserved. 41 * Copyright (c) 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67#ifndef _ALPHA_INTR_H_ 68#define _ALPHA_INTR_H_ 69 70#include <sys/device.h> 71#include <sys/lock.h> 72#include <sys/queue.h> 73#include <machine/atomic.h> 74 75/* 76 * Alpha interrupts come in at one of 4 levels: 77 * 78 * software interrupt level 79 * i/o level 1 80 * i/o level 2 81 * clock level 82 * 83 * However, since we do not have any way to know which hardware 84 * level a particular i/o interrupt comes in on, we have to 85 * whittle it down to 3. 86 */ 87 88#define IPL_NONE 1 /* disable only this interrupt */ 89#define IPL_BIO 1 /* disable block I/O interrupts */ 90#define IPL_NET 1 /* disable network interrupts */ 91#define IPL_TTY 1 /* disable terminal interrupts */ 92#define IPL_CLOCK 2 /* disable clock interrupts */ 93#define IPL_HIGH 3 /* disable all interrupts */ 94#define IPL_SERIAL 1 /* disable serial interrupts */ 95 96#define IPL_SOFTSERIAL 0 /* serial software interrupts */ 97#define IPL_SOFTNET 1 /* network software interrupts */ 98#define IPL_SOFTCLOCK 2 /* clock software interrupts */ 99#define IPL_SOFT 3 /* other software interrupts */ 100#define IPL_NSOFT 4 101 102#define IPL_SOFTNAMES { \ 103 "serial", \ 104 "net", \ 105 "clock", \ 106 "misc", \ 107} 108 109#define IST_UNUSABLE -1 /* interrupt cannot be used */ 110#define IST_NONE 0 /* none (dummy) */ 111#define IST_PULSE 1 /* pulsed */ 112#define IST_EDGE 2 /* edge-triggered */ 113#define IST_LEVEL 3 /* level-triggered */ 114 115#ifdef _KERNEL 116 117/* IPL-lowering/restoring macros */ 118#define splx(s) \ 119 ((s) == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s)) 120#define spllowersoftclock() alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT) 121 122/* IPL-raising functions/macros */ 123static __inline int 124_splraise(int s) 125{ 126 int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK; 127 return (s > cur ? alpha_pal_swpipl(s) : cur); 128} 129#define splsoft() _splraise(ALPHA_PSL_IPL_SOFT) 130#define splsoftserial() splsoft() 131#define splsoftclock() splsoft() 132#define splsoftnet() splsoft() 133#define splnet() _splraise(ALPHA_PSL_IPL_IO) 134#define splbio() _splraise(ALPHA_PSL_IPL_IO) 135#define splimp() _splraise(ALPHA_PSL_IPL_IO) 136#define spltty() _splraise(ALPHA_PSL_IPL_IO) 137#define splserial() _splraise(ALPHA_PSL_IPL_IO) 138#define splclock() _splraise(ALPHA_PSL_IPL_CLOCK) 139#define splstatclock() _splraise(ALPHA_PSL_IPL_CLOCK) 140#define splhigh() _splraise(ALPHA_PSL_IPL_HIGH) 141 142#define spllpt() spltty() 143 144/* 145 * Interprocessor interrupts. In order how we want them processed. 146 */ 147#define ALPHA_IPI_HALT 0x0000000000000001UL 148#define ALPHA_IPI_TBIA 0x0000000000000002UL 149#define ALPHA_IPI_TBIAP 0x0000000000000004UL 150#define ALPHA_IPI_SHOOTDOWN 0x0000000000000008UL 151#define ALPHA_IPI_IMB 0x0000000000000010UL 152#define ALPHA_IPI_AST 0x0000000000000020UL 153 154#define ALPHA_NIPIS 6 /* must not exceed 64 */ 155 156typedef void (*ipifunc_t)(void); 157extern ipifunc_t ipifuncs[ALPHA_NIPIS]; 158 159void alpha_send_ipi(unsigned long, unsigned long); 160void alpha_broadcast_ipi(unsigned long); 161 162/* 163 * Alpha shared-interrupt-line common code. 164 */ 165 166struct alpha_shared_intrhand { 167 TAILQ_ENTRY(alpha_shared_intrhand) 168 ih_q; 169 struct alpha_shared_intr *ih_intrhead; 170 int (*ih_fn)(void *); 171 void *ih_arg; 172 int ih_level; 173 unsigned int ih_num; 174}; 175 176struct alpha_shared_intr { 177 TAILQ_HEAD(,alpha_shared_intrhand) 178 intr_q; 179 struct evcnt intr_evcnt; 180 char *intr_string; 181 void *intr_private; 182 int intr_sharetype; 183 int intr_dfltsharetype; 184 int intr_nstrays; 185 int intr_maxstrays; 186}; 187 188#define ALPHA_SHARED_INTR_DISABLE(asi, num) \ 189 ((asi)[num].intr_maxstrays != 0 && \ 190 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays) 191 192/* 193 * simulated software interrupt register 194 */ 195extern u_int64_t ssir; 196 197#define setsoft(x) atomic_setbits_ulong(&ssir, 1 << (x)) 198 199#define __GENERIC_SOFT_INTERRUPTS 200struct alpha_soft_intrhand { 201 LIST_ENTRY(alpha_soft_intrhand) 202 sih_q; 203 struct alpha_soft_intr *sih_intrhead; 204 void (*sih_fn)(void *); 205 void *sih_arg; 206 int sih_pending; 207}; 208 209struct alpha_soft_intr { 210 LIST_HEAD(, alpha_soft_intrhand) 211 softintr_q; 212 struct evcnt softintr_evcnt; 213 struct simplelock softintr_slock; 214 unsigned long softintr_ipl; 215}; 216 217void *softintr_establish(int, void (*)(void *), void *); 218void softintr_disestablish(void *); 219void softintr_init(void); 220void softintr_dispatch(void); 221 222#define softintr_schedule(arg) \ 223do { \ 224 struct alpha_soft_intrhand *__sih = (arg); \ 225 __sih->sih_pending = 1; \ 226 setsoft(__sih->sih_intrhead->softintr_ipl); \ 227} while (0) 228 229/* XXX For legacy software interrupts. */ 230extern struct alpha_soft_intrhand *softnet_intrhand; 231extern struct alpha_soft_intrhand *softclock_intrhand; 232 233#define setsoftnet() softintr_schedule(softnet_intrhand) 234#define setsoftclock() softintr_schedule(softclock_intrhand) 235 236struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int, unsigned int); 237int alpha_shared_intr_dispatch(struct alpha_shared_intr *, 238 unsigned int); 239void *alpha_shared_intr_establish(struct alpha_shared_intr *, 240 unsigned int, int, int, int (*)(void *), void *, const char *); 241void alpha_shared_intr_disestablish(struct alpha_shared_intr *, 242 void *, const char *); 243int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *, 244 unsigned int); 245int alpha_shared_intr_isactive(struct alpha_shared_intr *, 246 unsigned int); 247void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *, 248 unsigned int, int); 249void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *, 250 unsigned int, int); 251void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int, 252 const char *); 253void alpha_shared_intr_set_private(struct alpha_shared_intr *, 254 unsigned int, void *); 255void *alpha_shared_intr_get_private(struct alpha_shared_intr *, 256 unsigned int); 257char *alpha_shared_intr_string(struct alpha_shared_intr *, 258 unsigned int); 259struct evcnt *alpha_shared_intr_evcnt(struct alpha_shared_intr *, 260 unsigned int); 261 262void set_iointr(void (*)(void *, unsigned long)); 263 264#endif /* _KERNEL */ 265#endif /* ! _ALPHA_INTR_H_ */ 266