intr.h revision 1.1
1/* $NetBSD: intr.h,v 1.1 2003/10/19 03:33:50 matt 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 _IBMNWS_INTR_H_ 40#define _IBMNWS_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 */ 69struct intrhand { 70 int (*ih_fun)(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 78void do_pending_int(void); 79 80void init_intr(void); 81void init_intr_ivr(void); 82 83void enable_intr(void); 84void disable_intr(void); 85 86void *intr_establish(int, int, int, int (*)(void *), void *); 87void intr_disestablish(void *); 88 89void softnet(int); 90void softserial(void); 91int isa_intr(void); 92void isa_intr_mask(int); 93void isa_intr_clr(int); 94void isa_setirqstat(int, int, int); 95 96static __inline int splraise(int); 97static __inline void spllower(int); 98static __inline void set_sint(int); 99 100extern volatile int cpl, ipending, astpending, tickspending; 101extern int imen; 102extern int imask[]; 103extern long intrcnt[]; 104extern unsigned intrcnt2[]; 105extern struct intrhand *intrhand[]; 106extern int intrtype[]; 107extern vaddr_t prep_intr_reg; 108 109/* 110 * Reorder protection in the following inline functions is 111 * achieved with the "eieio" instruction which the assembler 112 * seems to detect and then doesn't move instructions past.... 113 */ 114static __inline int 115splraise(int newcpl) 116{ 117 int oldcpl; 118 119 __asm__ volatile("sync; eieio\n"); /* don't reorder.... */ 120 oldcpl = cpl; 121 cpl = oldcpl | newcpl; 122 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 123 return(oldcpl); 124} 125 126static __inline void 127spllower(int newcpl) 128{ 129 130 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 131 cpl = newcpl; 132 if(ipending & ~newcpl) 133 do_pending_int(); 134 __asm__ volatile("sync; eieio\n"); /* reorder protect */ 135} 136 137/* Following code should be implemented with lwarx/stwcx to avoid 138 * the disable/enable. i need to read the manual once more.... */ 139static __inline void 140set_sint(int pending) 141{ 142 int msrsave; 143 144 __asm__ ("mfmsr %0" : "=r"(msrsave)); 145 __asm__ volatile ("mtmsr %0" :: "r"(msrsave & ~PSL_EE)); 146 ipending |= pending; 147 __asm__ volatile ("mtmsr %0" :: "r"(msrsave)); 148} 149 150#define ICU_LEN 32 151#define IRQ_SLAVE 2 152#define LEGAL_IRQ(x) ((x) >= 0 && (x) < ICU_LEN && (x) != IRQ_SLAVE) 153#define I8259_INTR_NUM 16 154 155#define PREP_INTR_REG 0xbffff000 156#define INTR_VECTOR_REG 0xff0 157 158#define SINT_CLOCK 0x20000000 159#define SINT_NET 0x40000000 160#define SINT_SERIAL 0x80000000 161#define SPL_CLOCK 0x00000001 162#define SINT_MASK (SINT_CLOCK|SINT_NET|SINT_SERIAL) 163 164#define CNT_SINT_NET 29 165#define CNT_SINT_CLOCK 30 166#define CNT_SINT_SERIAL 31 167#define CNT_CLOCK 0 168 169#define splbio() splraise(imask[IPL_BIO]) 170#define splnet() splraise(imask[IPL_NET]) 171#define spltty() splraise(imask[IPL_TTY]) 172#define splclock() splraise(imask[IPL_CLOCK]) 173#define splvm() splraise(imask[IPL_IMP]) 174#define splaudio() splraise(imask[IPL_AUDIO]) 175#define splserial() splraise(imask[IPL_SERIAL]) 176#define splstatclock() splclock() 177#define spllowersoftclock() spllower(imask[IPL_SOFTCLOCK]) 178#define splsoftclock() splraise(imask[IPL_SOFTCLOCK]) 179#define splsoftnet() splraise(imask[IPL_SOFTNET]) 180#define splsoftserial() splraise(imask[IPL_SOFTSERIAL]) 181 182#define spllpt() spltty() 183 184#define setsoftclock() set_sint(SINT_CLOCK); 185#define setsoftnet() set_sint(SINT_NET); 186#define setsoftserial() set_sint(SINT_SERIAL); 187 188#define splhigh() splraise(imask[IPL_HIGH]) 189#define splsched() splhigh() 190#define spllock() splhigh() 191#define splx(x) spllower(x) 192#define spl0() spllower(0) 193 194#define CLKF_BASEPRI(pri) ((pri) != 0) 195 196#endif /* !_LOCORE */ 197 198#endif /* !_IBMNWS_INTR_H_ */ 199