1 /* $NetBSD: intr.c,v 1.1 2001/07/28 13:28:03 chris Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe 18 * for the NetBSD Project. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Soft interrupt and other generic interrupt functions. 36 */ 37 38 #include "opt_irqstats.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/syslog.h> 43 #include <sys/malloc.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/irqhandler.h> 48 #include <machine/cpu.h> 49 50 #include <net/netisr.h> 51 52 u_int soft_interrupts = 0; 53 54 extern int current_spl_level; 55 56 /* Generate soft interrupt counts if IRQSTATS is defined */ 57 #ifdef IRQSTATS 58 extern u_int sintrcnt[]; 59 #define INC_SINTRCNT(x) ++sintrcnt[x] 60 #else 61 #define INC_SINTRCNT(x) 62 #endif /* IRQSTATS */ 63 64 #define COUNT uvmexp.softs; 65 66 /* Prototypes */ 67 68 #include "com.h" 69 #if NCOM > 0 70 extern void comsoft __P((void)); 71 #endif /* NCOM > 0 */ 72 73 /* Eventually these will become macros */ 74 75 void 76 setsoftintr(intrmask) 77 u_int intrmask; 78 { 79 atomic_set_bit(&soft_interrupts, intrmask); 80 } 81 82 void 83 clearsoftintr(intrmask) 84 u_int intrmask; 85 { 86 atomic_clear_bit(&soft_interrupts, intrmask); 87 } 88 89 void 90 setsoftclock() 91 { 92 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_CLOCK)); 93 } 94 95 void 96 setsoftnet() 97 { 98 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_NET)); 99 } 100 101 void 102 setsoftserial() 103 { 104 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_SERIAL)); 105 } 106 107 int astpending; 108 109 /* Handle software interrupts */ 110 111 void 112 dosoftints() 113 { 114 u_int softints; 115 int s; 116 117 softints = soft_interrupts & spl_smasks[current_spl_level]; 118 if (softints == 0) return; 119 120 /* 121 * Software clock interrupts 122 */ 123 124 if (softints & SOFTIRQ_BIT(SOFTIRQ_CLOCK)) { 125 s = splsoftclock(); 126 ++COUNT; 127 INC_SINTRCNT(SOFTIRQ_CLOCK); 128 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_CLOCK)); 129 softclock(NULL); 130 (void)splx(s); 131 } 132 133 /* 134 * Network software interrupts 135 */ 136 137 if (softints & SOFTIRQ_BIT(SOFTIRQ_NET)) { 138 s = splsoftnet(); 139 ++COUNT; 140 INC_SINTRCNT(SOFTIRQ_NET); 141 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_NET)); 142 143 #define DONETISR(bit, fn) do { \ 144 if (netisr & (1 << bit)) { \ 145 atomic_clear_bit(&netisr, (1 << bit)); \ 146 fn(); \ 147 } \ 148 } while (0) 149 150 #include <net/netisr_dispatch.h> 151 152 #undef DONETISR 153 154 (void)splx(s); 155 } 156 /* 157 * Serial software interrupts 158 */ 159 160 if (softints & SOFTIRQ_BIT(SOFTIRQ_SERIAL)) { 161 s = splsoftserial(); 162 ++COUNT; 163 INC_SINTRCNT(SOFTIRQ_SERIAL); 164 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_SERIAL)); 165 #if NCOM > 0 166 comsoft(); 167 #endif /* NCOM > 0 */ 168 (void)splx(s); 169 } 170 } 171 172 /* End of intr.c */ 173