intr.h revision 1.27
1 /* $NetBSD: intr.h,v 1.27 2000/06/04 05:23:18 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 (at) 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/lock.h> 71 #include <sys/queue.h> 72 #include <machine/atomic.h> 73 74 /* 75 * Alpha interrupts come in at one of 4 levels: 76 * 77 * software interrupt level 78 * i/o level 1 79 * i/o level 2 80 * clock level 81 * 82 * However, since we do not have any way to know which hardware 83 * level a particular i/o interrupt comes in on, we have to 84 * whittle it down to 3. 85 */ 86 87 #define IPL_NONE 1 /* disable only this interrupt */ 88 #define IPL_BIO 1 /* disable block I/O interrupts */ 89 #define IPL_NET 1 /* disable network interrupts */ 90 #define IPL_TTY 1 /* disable terminal interrupts */ 91 #define IPL_CLOCK 2 /* disable clock interrupts */ 92 #define IPL_HIGH 3 /* disable all interrupts */ 93 #define IPL_SERIAL 1 /* disable serial interrupts */ 94 95 #define IPL_SOFTSERIAL 0 /* serial software interrupts */ 96 #define IPL_SOFTNET 1 /* network software interrupts */ 97 #define IPL_SOFTCLOCK 2 /* clock software interrupts */ 98 #define IPL_SOFT 3 /* other software interrupts */ 99 #define IPL_NSOFT 4 100 101 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 102 #define IST_NONE 0 /* none (dummy) */ 103 #define IST_PULSE 1 /* pulsed */ 104 #define IST_EDGE 2 /* edge-triggered */ 105 #define IST_LEVEL 3 /* level-triggered */ 106 107 #ifdef _KERNEL 108 109 /* IPL-lowering/restoring macros */ 110 #define splx(s) \ 111 ((s) == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s)) 112 #define spllowersoftclock() alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT) 113 114 /* IPL-raising functions/macros */ 115 static __inline int 116 _splraise(int s) 117 { 118 int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK; 119 return (s > cur ? alpha_pal_swpipl(s) : cur); 120 } 121 #define splsoft() _splraise(ALPHA_PSL_IPL_SOFT) 122 #define splsoftserial() splsoft() 123 #define splsoftclock() splsoft() 124 #define splsoftnet() splsoft() 125 #define splnet() _splraise(ALPHA_PSL_IPL_IO) 126 #define splbio() _splraise(ALPHA_PSL_IPL_IO) 127 #define splimp() _splraise(ALPHA_PSL_IPL_IO) 128 #define spltty() _splraise(ALPHA_PSL_IPL_IO) 129 #define splserial() _splraise(ALPHA_PSL_IPL_IO) 130 #define splclock() _splraise(ALPHA_PSL_IPL_CLOCK) 131 #define splstatclock() _splraise(ALPHA_PSL_IPL_CLOCK) 132 #define splhigh() _splraise(ALPHA_PSL_IPL_HIGH) 133 134 #define spllpt() spltty() 135 136 /* 137 * Interprocessor interrupts. In order how we want them processed. 138 */ 139 #define ALPHA_IPI_HALT 0x0000000000000001UL 140 #define ALPHA_IPI_TBIA 0x0000000000000002UL 141 #define ALPHA_IPI_TBIAP 0x0000000000000004UL 142 #define ALPHA_IPI_SHOOTDOWN 0x0000000000000008UL 143 #define ALPHA_IPI_IMB 0x0000000000000010UL 144 #define ALPHA_IPI_AST 0x0000000000000020UL 145 146 #define ALPHA_NIPIS 6 /* must not exceed 64 */ 147 148 typedef void (*ipifunc_t)(void); 149 extern ipifunc_t ipifuncs[ALPHA_NIPIS]; 150 151 void alpha_send_ipi(unsigned long, unsigned long); 152 void alpha_broadcast_ipi(unsigned long); 153 154 /* 155 * Alpha shared-interrupt-line common code. 156 */ 157 158 struct alpha_shared_intrhand { 159 TAILQ_ENTRY(alpha_shared_intrhand) 160 ih_q; 161 struct alpha_shared_intr *ih_intrhead; 162 int (*ih_fn)(void *); 163 void *ih_arg; 164 int ih_level; 165 unsigned int ih_num; 166 }; 167 168 struct alpha_shared_intr { 169 TAILQ_HEAD(,alpha_shared_intrhand) 170 intr_q; 171 void *intr_private; 172 int intr_sharetype; 173 int intr_dfltsharetype; 174 int intr_nstrays; 175 int intr_maxstrays; 176 }; 177 178 #define ALPHA_SHARED_INTR_DISABLE(asi, num) \ 179 ((asi)[num].intr_maxstrays != 0 && \ 180 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays) 181 182 /* 183 * simulated software interrupt register 184 */ 185 extern u_int64_t ssir; 186 187 #define setsoft(x) atomic_setbits_ulong(&ssir, 1 << (x)) 188 189 #define __GENERIC_SOFT_INTERRUPTS 190 struct alpha_soft_intrhand { 191 LIST_ENTRY(alpha_soft_intrhand) 192 sih_q; 193 struct alpha_soft_intr *sih_intrhead; 194 void (*sih_fn)(void *); 195 void *sih_arg; 196 int sih_pending; 197 }; 198 199 struct alpha_soft_intr { 200 LIST_HEAD(, alpha_soft_intrhand) 201 softintr_q; 202 struct simplelock softintr_slock; 203 unsigned long softintr_ipl; 204 }; 205 206 void *softintr_establish(int, void (*)(void *), void *); 207 void softintr_disestablish(void *); 208 void softintr_init(void); 209 void softintr_dispatch(void); 210 211 #define softintr_schedule(arg) \ 212 do { \ 213 struct alpha_soft_intrhand *__sih = (arg); \ 214 __sih->sih_pending = 1; \ 215 setsoft(__sih->sih_intrhead->softintr_ipl); \ 216 } while (0) 217 218 /* XXX For legacy software interrupts. */ 219 extern struct alpha_soft_intrhand *softnet_intrhand; 220 extern struct alpha_soft_intrhand *softclock_intrhand; 221 222 #define setsoftnet() softintr_schedule(softnet_intrhand) 223 #define setsoftclock() softintr_schedule(softclock_intrhand) 224 225 struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int); 226 int alpha_shared_intr_dispatch(struct alpha_shared_intr *, 227 unsigned int); 228 void *alpha_shared_intr_establish(struct alpha_shared_intr *, 229 unsigned int, int, int, int (*)(void *), void *, const char *); 230 void alpha_shared_intr_disestablish(struct alpha_shared_intr *, 231 void *, const char *); 232 int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *, 233 unsigned int); 234 int alpha_shared_intr_isactive(struct alpha_shared_intr *, 235 unsigned int); 236 void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *, 237 unsigned int, int); 238 void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *, 239 unsigned int, int); 240 void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int, 241 const char *); 242 void alpha_shared_intr_set_private(struct alpha_shared_intr *, 243 unsigned int, void *); 244 void *alpha_shared_intr_get_private(struct alpha_shared_intr *, 245 unsigned int); 246 247 #endif /* _KERNEL */ 248 #endif /* ! _ALPHA_INTR_H_ */ 249
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