intr.h revision 1.70
1 /* $NetBSD: intr.h,v 1.70 2012/02/06 02:14:13 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001, 2002 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997 Christopher G. Demetriou. All rights reserved. 34 * Copyright (c) 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #ifndef _ALPHA_INTR_H_ 61 #define _ALPHA_INTR_H_ 62 63 #include <sys/evcnt.h> 64 #include <machine/cpu.h> 65 66 /* 67 * The Alpha System Control Block. This is 8k long, and you get 68 * 16 bytes per vector (i.e. the vector numbers are spaced 16 69 * apart). 70 * 71 * This is sort of a "shadow" SCB -- rather than the CPU jumping 72 * to (SCBaddr + (16 * vector)), like it does on the VAX, we get 73 * a vector number in a1. We use the SCB to look up a routine/arg 74 * and jump to it. 75 * 76 * Since we use the SCB only for I/O interrupts, we make it shorter 77 * than normal, starting it at vector 0x800 (the start of the I/O 78 * interrupt vectors). 79 */ 80 #define SCB_IOVECBASE 0x0800 81 #define SCB_VECSIZE 0x0010 82 #define SCB_SIZE 0x2000 83 84 #define SCB_VECTOIDX(x) ((x) >> 4) 85 #define SCB_IDXTOVEC(x) ((x) << 4) 86 87 #define SCB_NIOVECS SCB_VECTOIDX(SCB_SIZE - SCB_IOVECBASE) 88 89 struct scbvec { 90 void (*scb_func)(void *, u_long); 91 void *scb_arg; 92 }; 93 94 /* 95 * Alpha interrupts come in at one of 4 levels: 96 * 97 * software interrupt level 98 * i/o level 1 99 * i/o level 2 100 * clock level 101 * 102 * However, since we do not have any way to know which hardware 103 * level a particular i/o interrupt comes in on, we have to 104 * whittle it down to 3. 105 */ 106 107 #define IPL_NONE 0 /* no interrupt level */ 108 #define IPL_SOFTCLOCK 1 /* generic software interrupts */ 109 #define IPL_SOFTBIO 1 /* generic software interrupts */ 110 #define IPL_SOFTNET 1 /* generic software interrupts */ 111 #define IPL_SOFTSERIAL 1 /* generic software interrupts */ 112 #define IPL_VM 2 /* interrupts that can alloc mem */ 113 #define IPL_SCHED 3 /* clock interrupts */ 114 #define IPL_HIGH 4 /* all interrupts */ 115 116 typedef int ipl_t; 117 typedef struct { 118 uint8_t _psl; 119 } ipl_cookie_t; 120 121 ipl_cookie_t makeiplcookie(ipl_t); 122 123 #define IST_UNUSABLE -1 /* interrupt cannot be used */ 124 #define IST_NONE 0 /* none (dummy) */ 125 #define IST_PULSE 1 /* pulsed */ 126 #define IST_EDGE 2 /* edge-triggered */ 127 #define IST_LEVEL 3 /* level-triggered */ 128 129 #ifdef _KERNEL 130 131 /* Simulated software interrupt register. */ 132 extern volatile unsigned long ssir; 133 134 /* IPL-lowering/restoring macros */ 135 void spl0(void); 136 137 static __inline void 138 splx(int s) 139 { 140 if (s == ALPHA_PSL_IPL_0 && ssir != 0) 141 spl0(); 142 else 143 alpha_pal_swpipl(s); 144 } 145 /* IPL-raising functions/macros */ 146 static __inline int 147 _splraise(int s) 148 { 149 int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK; 150 return (s > cur ? alpha_pal_swpipl(s) : cur); 151 } 152 153 #define splraiseipl(icookie) _splraise((icookie)._psl) 154 155 #include <sys/spl.h> 156 157 /* 158 * Interprocessor interrupts. In order how we want them processed. 159 */ 160 #define ALPHA_IPI_HALT (1UL << 0) 161 #define ALPHA_IPI_MICROSET (1UL << 1) 162 #define ALPHA_IPI_SHOOTDOWN (1UL << 2) 163 #define ALPHA_IPI_IMB (1UL << 3) 164 #define ALPHA_IPI_AST (1UL << 4) 165 #define ALPHA_IPI_PAUSE (1UL << 5) 166 #define ALPHA_IPI_XCALL (1UL << 6) 167 168 #define ALPHA_NIPIS 7 /* must not exceed 64 */ 169 170 struct cpu_info; 171 struct trapframe; 172 173 void alpha_ipi_init(struct cpu_info *); 174 void alpha_ipi_process(struct cpu_info *, struct trapframe *); 175 void alpha_send_ipi(unsigned long, unsigned long); 176 void alpha_broadcast_ipi(unsigned long); 177 void alpha_multicast_ipi(unsigned long, unsigned long); 178 179 /* 180 * Alpha shared-interrupt-line common code. 181 */ 182 183 struct alpha_shared_intrhand { 184 TAILQ_ENTRY(alpha_shared_intrhand) 185 ih_q; 186 struct alpha_shared_intr *ih_intrhead; 187 int (*ih_fn)(void *); 188 void *ih_arg; 189 int ih_level; 190 unsigned int ih_num; 191 }; 192 193 struct alpha_shared_intr { 194 TAILQ_HEAD(,alpha_shared_intrhand) 195 intr_q; 196 struct evcnt intr_evcnt; 197 char *intr_string; 198 void *intr_private; 199 int intr_sharetype; 200 int intr_dfltsharetype; 201 int intr_nstrays; 202 int intr_maxstrays; 203 }; 204 205 #define ALPHA_SHARED_INTR_DISABLE(asi, num) \ 206 ((asi)[num].intr_maxstrays != 0 && \ 207 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays) 208 209 void softintr_dispatch(void); 210 211 struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int, unsigned int); 212 int alpha_shared_intr_dispatch(struct alpha_shared_intr *, 213 unsigned int); 214 void *alpha_shared_intr_establish(struct alpha_shared_intr *, 215 unsigned int, int, int, int (*)(void *), void *, const char *); 216 void alpha_shared_intr_disestablish(struct alpha_shared_intr *, 217 void *, const char *); 218 int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *, 219 unsigned int); 220 int alpha_shared_intr_isactive(struct alpha_shared_intr *, 221 unsigned int); 222 int alpha_shared_intr_firstactive(struct alpha_shared_intr *, 223 unsigned int); 224 void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *, 225 unsigned int, int); 226 void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *, 227 unsigned int, int); 228 void alpha_shared_intr_reset_strays(struct alpha_shared_intr *, 229 unsigned int); 230 void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int, 231 const char *); 232 void alpha_shared_intr_set_private(struct alpha_shared_intr *, 233 unsigned int, void *); 234 void *alpha_shared_intr_get_private(struct alpha_shared_intr *, 235 unsigned int); 236 char *alpha_shared_intr_string(struct alpha_shared_intr *, 237 unsigned int); 238 struct evcnt *alpha_shared_intr_evcnt(struct alpha_shared_intr *, 239 unsigned int); 240 241 extern struct scbvec scb_iovectab[]; 242 243 void scb_init(void); 244 void scb_set(u_long, void (*)(void *, u_long), void *, int); 245 u_long scb_alloc(void (*)(void *, u_long), void *); 246 void scb_free(u_long); 247 248 #define SCB_ALLOC_FAILED ((u_long) -1) 249 250 #endif /* _KERNEL */ 251 #endif /* ! _ALPHA_INTR_H_ */ 252
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