1 /* $NetBSD: intr.c,v 1.3 2001/10/27 16:34:12 rearnsha 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/intr.h> 48 #include <machine/cpu.h> 49 50 #include <net/netisr.h> 51 52 #include <machine/conf.h> 53 54 #ifndef NPLCOM 55 #define NPLCOM 0 56 #endif 57 58 u_int soft_interrupts = 0; 59 60 extern int current_spl_level; 61 62 extern unsigned spl_mask; 63 64 /* Generate soft interrupt counts if IRQSTATS is defined */ 65 #ifdef IRQSTATS 66 extern u_int sintrcnt[]; 67 #define INC_SINTRCNT(x) ++sintrcnt[x] 68 #else 69 #define INC_SINTRCNT(x) 70 #endif /* IRQSTATS */ 71 72 #define COUNT uvmexp.softs; 73 74 /* Prototypes */ 75 76 #include "com.h" 77 #if NCOM > 0 78 extern void comsoft __P((void)); 79 #endif /* NCOM > 0 */ 80 81 #if NPLCOM > 0 82 extern void plcomsoft __P((void)); 83 #endif /* NPLCOM > 0 */ 84 85 /* Eventually these will become macros */ 86 87 void 88 setsoftintr(intrmask) 89 u_int intrmask; 90 { 91 atomic_set_bit(&soft_interrupts, intrmask); 92 } 93 94 void 95 clearsoftintr(intrmask) 96 u_int intrmask; 97 { 98 atomic_clear_bit(&soft_interrupts, intrmask); 99 } 100 101 void 102 setsoftclock() 103 { 104 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_CLOCK)); 105 } 106 107 void 108 setsoftnet() 109 { 110 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_NET)); 111 } 112 113 void 114 setsoftserial() 115 { 116 atomic_set_bit(&soft_interrupts, SOFTIRQ_BIT(SOFTIRQ_SERIAL)); 117 } 118 119 int astpending; 120 121 /* Handle software interrupts */ 122 123 void 124 dosoftints() 125 { 126 u_int softints; 127 int s; 128 129 softints = soft_interrupts & spl_smasks[current_spl_level]; 130 if (softints == 0) return; 131 132 /* 133 * Software clock interrupts 134 */ 135 136 if (softints & SOFTIRQ_BIT(SOFTIRQ_CLOCK)) { 137 s = splsoftclock(); 138 ++COUNT; 139 INC_SINTRCNT(SOFTIRQ_CLOCK); 140 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_CLOCK)); 141 softclock(NULL); 142 (void)splx(s); 143 } 144 145 /* 146 * Network software interrupts 147 */ 148 149 if (softints & SOFTIRQ_BIT(SOFTIRQ_NET)) { 150 s = splsoftnet(); 151 ++COUNT; 152 INC_SINTRCNT(SOFTIRQ_NET); 153 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_NET)); 154 155 #define DONETISR(bit, fn) do { \ 156 if (netisr & (1 << bit)) { \ 157 atomic_clear_bit(&netisr, (1 << bit)); \ 158 fn(); \ 159 } \ 160 } while (0) 161 162 #include <net/netisr_dispatch.h> 163 164 #undef DONETISR 165 166 (void)splx(s); 167 } 168 /* 169 * Serial software interrupts 170 */ 171 172 if (softints & SOFTIRQ_BIT(SOFTIRQ_SERIAL)) { 173 s = splsoftserial(); 174 ++COUNT; 175 INC_SINTRCNT(SOFTIRQ_SERIAL); 176 clearsoftintr(SOFTIRQ_BIT(SOFTIRQ_SERIAL)); 177 #if NCOM > 0 178 comsoft(); 179 #endif /* NCOM > 0 */ 180 #if NPLCOM > 0 181 plcomsoft(); 182 #endif /* NPLCOM > 0 */ 183 (void)splx(s); 184 } 185 } 186 187 /* End of intr.c */ 188