intr.h revision 1.32
1/* $NetBSD: intr.h,v 1.32 2000/08/15 22:16:19 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 */ 118void spl0(void); 119static __inline void 120splx(int s) 121{ 122 if (s == ALPHA_PSL_IPL_0) 123 spl0(); 124 else 125 alpha_pal_swpipl(s); 126} 127#define spllowersoftclock() ((void)alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT)) 128 129/* IPL-raising functions/macros */ 130static __inline int 131_splraise(int s) 132{ 133 int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK; 134 return (s > cur ? alpha_pal_swpipl(s) : cur); 135} 136#define splsoft() _splraise(ALPHA_PSL_IPL_SOFT) 137#define splsoftserial() splsoft() 138#define splsoftclock() splsoft() 139#define splsoftnet() splsoft() 140#define splnet() _splraise(ALPHA_PSL_IPL_IO) 141#define splbio() _splraise(ALPHA_PSL_IPL_IO) 142#define splimp() _splraise(ALPHA_PSL_IPL_IO) 143#define spltty() _splraise(ALPHA_PSL_IPL_IO) 144#define splserial() _splraise(ALPHA_PSL_IPL_IO) 145#define splclock() _splraise(ALPHA_PSL_IPL_CLOCK) 146#define splstatclock() _splraise(ALPHA_PSL_IPL_CLOCK) 147#define splhigh() _splraise(ALPHA_PSL_IPL_HIGH) 148 149#define spllpt() spltty() 150 151/* 152 * Interprocessor interrupts. In order how we want them processed. 153 */ 154#define ALPHA_IPI_HALT 0x0000000000000001UL 155#define ALPHA_IPI_TBIA 0x0000000000000002UL 156#define ALPHA_IPI_TBIAP 0x0000000000000004UL 157#define ALPHA_IPI_SHOOTDOWN 0x0000000000000008UL 158#define ALPHA_IPI_IMB 0x0000000000000010UL 159#define ALPHA_IPI_AST 0x0000000000000020UL 160#define ALPHA_IPI_SYNCH_FPU 0x0000000000000040UL 161#define ALPHA_IPI_DISCARD_FPU 0x0000000000000080UL 162 163#define ALPHA_NIPIS 8 /* must not exceed 64 */ 164 165typedef void (*ipifunc_t)(void); 166extern ipifunc_t ipifuncs[ALPHA_NIPIS]; 167 168void alpha_send_ipi(unsigned long, unsigned long); 169void alpha_broadcast_ipi(unsigned long); 170void alpha_multicast_ipi(unsigned long, unsigned long); 171 172/* 173 * Alpha shared-interrupt-line common code. 174 */ 175 176struct alpha_shared_intrhand { 177 TAILQ_ENTRY(alpha_shared_intrhand) 178 ih_q; 179 struct alpha_shared_intr *ih_intrhead; 180 int (*ih_fn)(void *); 181 void *ih_arg; 182 int ih_level; 183 unsigned int ih_num; 184}; 185 186struct alpha_shared_intr { 187 TAILQ_HEAD(,alpha_shared_intrhand) 188 intr_q; 189 struct evcnt intr_evcnt; 190 char *intr_string; 191 void *intr_private; 192 int intr_sharetype; 193 int intr_dfltsharetype; 194 int intr_nstrays; 195 int intr_maxstrays; 196}; 197 198#define ALPHA_SHARED_INTR_DISABLE(asi, num) \ 199 ((asi)[num].intr_maxstrays != 0 && \ 200 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays) 201 202/* 203 * simulated software interrupt register 204 */ 205extern u_int64_t ssir; 206 207#define setsoft(x) atomic_setbits_ulong(&ssir, 1 << (x)) 208 209#define __GENERIC_SOFT_INTERRUPTS 210struct alpha_soft_intrhand { 211 LIST_ENTRY(alpha_soft_intrhand) 212 sih_q; 213 struct alpha_soft_intr *sih_intrhead; 214 void (*sih_fn)(void *); 215 void *sih_arg; 216 int sih_pending; 217}; 218 219struct alpha_soft_intr { 220 LIST_HEAD(, alpha_soft_intrhand) 221 softintr_q; 222 struct evcnt softintr_evcnt; 223 struct simplelock softintr_slock; 224 unsigned long softintr_ipl; 225}; 226 227void *softintr_establish(int, void (*)(void *), void *); 228void softintr_disestablish(void *); 229void softintr_init(void); 230void softintr_dispatch(void); 231 232#define softintr_schedule(arg) \ 233do { \ 234 struct alpha_soft_intrhand *__sih = (arg); \ 235 __sih->sih_pending = 1; \ 236 setsoft(__sih->sih_intrhead->softintr_ipl); \ 237} while (0) 238 239/* XXX For legacy software interrupts. */ 240extern struct alpha_soft_intrhand *softnet_intrhand; 241extern struct alpha_soft_intrhand *softclock_intrhand; 242 243#define setsoftnet() softintr_schedule(softnet_intrhand) 244#define setsoftclock() softintr_schedule(softclock_intrhand) 245 246struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int, unsigned int); 247int alpha_shared_intr_dispatch(struct alpha_shared_intr *, 248 unsigned int); 249void *alpha_shared_intr_establish(struct alpha_shared_intr *, 250 unsigned int, int, int, int (*)(void *), void *, const char *); 251void alpha_shared_intr_disestablish(struct alpha_shared_intr *, 252 void *, const char *); 253int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *, 254 unsigned int); 255int alpha_shared_intr_isactive(struct alpha_shared_intr *, 256 unsigned int); 257void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *, 258 unsigned int, int); 259void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *, 260 unsigned int, int); 261void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int, 262 const char *); 263void alpha_shared_intr_set_private(struct alpha_shared_intr *, 264 unsigned int, void *); 265void *alpha_shared_intr_get_private(struct alpha_shared_intr *, 266 unsigned int); 267char *alpha_shared_intr_string(struct alpha_shared_intr *, 268 unsigned int); 269struct evcnt *alpha_shared_intr_evcnt(struct alpha_shared_intr *, 270 unsigned int); 271 272void set_iointr(void (*)(void *, unsigned long)); 273 274#endif /* _KERNEL */ 275#endif /* ! _ALPHA_INTR_H_ */ 276