1 /* $NetBSD: intr.h,v 1.1 2000/02/29 15:21:29 nonaka Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 #ifndef _PREP_INTR_H_ 40 #define _PREP_INTR_H_ 41 42 /* Interrupt priority `levels'. */ 43 #define IPL_NONE 9 /* nothing */ 44 #define IPL_SOFTCLOCK 8 /* software clock interrupt */ 45 #define IPL_SOFTNET 7 /* software network interrupt */ 46 #define IPL_BIO 6 /* block I/O */ 47 #define IPL_NET 5 /* network */ 48 #define IPL_SOFTSERIAL 4 /* software serial interrupt */ 49 #define IPL_TTY 3 /* terminal */ 50 #define IPL_IMP 3 /* memory allocation */ 51 #define IPL_AUDIO 2 /* audio */ 52 #define IPL_CLOCK 1 /* clock */ 53 #define IPL_HIGH 1 /* everything */ 54 #define IPL_SERIAL 0 /* serial */ 55 #define NIPL 10 56 57 /* Interrupt sharing types. */ 58 #define IST_NONE 0 /* none */ 59 #define IST_PULSE 1 /* pulsed */ 60 #define IST_EDGE 2 /* edge-triggered */ 61 #define IST_LEVEL 3 /* level-triggered */ 62 63 #ifndef _LOCORE 64 65 /* 66 * Interrupt handler chains. intr_establish() inserts a handler into 67 * the list. The handler is called with its (single) argument. 68 */ 69 struct intrhand { 70 int (*ih_fun) __P((void *)); 71 void *ih_arg; 72 u_long ih_count; 73 struct intrhand *ih_next; 74 int ih_level; 75 int ih_irq; 76 }; 77 78 void setsoftclock __P((void)); 79 void clearsoftclock __P((void)); 80 int splsoftclock __P((void)); 81 void setsoftnet __P((void)); 82 void clearsoftnet __P((void)); 83 int splsoftnet __P((void)); 84 85 void do_pending_int __P((void)); 86 87 void ext_intr __P((void)); 88 89 void enable_intr __P((void)); 90 void disable_intr __P((void)); 91 92 void *intr_establish __P((int, int, int, int (*) __P((void *)), void *)); 93 void intr_disestablish __P((void *)); 94 95 void softnet __P((void)); 96 void softserial __P((void)); 97 98 static __inline int splraise __P((int)); 99 static __inline int spllower __P((int)); 100 static __inline void splx __P((int)); 101 static __inline void set_sint __P((int)); 102 103 extern volatile int cpl, ipending, astpending, tickspending; 104 extern int imask[]; 105 extern long intrcnt[]; 106 107 /* 108 * Reorder protection in the following inline functions is 109 * achived with the "eieio" instruction which the assembler 110 * seems to detect and then doen't move instructions past.... 111 */ 112 static __inline int 113 splraise(newcpl) 114 int newcpl; 115 { 116 int oldcpl; 117 118 __asm__ volatile("sync; eieio\n"); /* don't reorder.... */ 119 oldcpl = cpl; 120 cpl = oldcpl | newcpl; 121 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 122 return(oldcpl); 123 } 124 125 static __inline void 126 splx(newcpl) 127 int newcpl; 128 { 129 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 130 cpl = newcpl; 131 if(ipending & ~newcpl) 132 do_pending_int(); 133 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 134 } 135 136 static __inline int 137 spllower(newcpl) 138 int newcpl; 139 { 140 int oldcpl; 141 142 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 143 oldcpl = cpl; 144 cpl = newcpl; 145 if(ipending & ~newcpl) 146 do_pending_int(); 147 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 148 return(oldcpl); 149 } 150 151 /* Following code should be implemented with lwarx/stwcx to avoid 152 * the disable/enable. i need to read the manual once more.... */ 153 static __inline void 154 set_sint(pending) 155 int pending; 156 { 157 int msrsave; 158 159 __asm__ ("mfmsr %0" : "=r"(msrsave)); 160 __asm__ volatile ("mtmsr %0" :: "r"(msrsave & ~PSL_EE)); 161 ipending |= pending; 162 __asm__ volatile ("mtmsr %0" :: "r"(msrsave)); 163 } 164 165 #define ICU_LEN 32 166 #define IRQ_SLAVE 2 167 #define LEGAL_IRQ(x) ((x) >= 0 && (x) < ICU_LEN && (x) != IRQ_SLAVE) 168 169 #define PREP_INTR_REG 0xbffff000 170 #define INTR_VECTOR_REG 0xff0 171 172 #define SINT_CLOCK 0x20000000 173 #define SINT_NET 0x40000000 174 #define SINT_SERIAL 0x80000000 175 #define SPL_CLOCK 0x00000001 176 #define SINT_MASK (SINT_CLOCK|SINT_NET|SINT_SERIAL) 177 178 #define CNT_SINT_NET 29 179 #define CNT_SINT_CLOCK 30 180 #define CNT_SINT_SERIAL 31 181 #define CNT_CLOCK 0 182 183 #define splbio() splraise(imask[IPL_BIO]) 184 #define splnet() splraise(imask[IPL_NET]) 185 #define spltty() splraise(imask[IPL_TTY]) 186 #define splclock() splraise(imask[IPL_CLOCK]) 187 #define splimp() splraise(imask[IPL_IMP]) 188 #define splaudio() splraise(imask[IPL_AUDIO]) 189 #define splserial() splraise(imask[IPL_SERIAL]) 190 #define splstatclock() splclock() 191 #define spllowersoftclock() spllower(imask[IPL_SOFTCLOCK]) 192 #define splsoftclock() splraise(imask[IPL_SOFTCLOCK]) 193 #define splsoftnet() splraise(imask[IPL_SOFTNET]) 194 #define splsoftserial() splraise(imask[IPL_SOFTSERIAL]) 195 196 #define spllpt() spltty() 197 198 #define setsoftclock() set_sint(SINT_CLOCK); 199 #define setsoftnet() set_sint(SINT_NET); 200 #define setsoftserial() set_sint(SINT_SERIAL); 201 202 #define splhigh() splraise(imask[IPL_HIGH]) 203 #define spl0() spllower(0) 204 205 #endif /* !_LOCORE */ 206 207 #endif /* !_PREP_INTR_H_ */ 208