1 /* 2 * Copyright (c) 1980, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)netisr.h 7.4 (Berkeley) 06/27/88 18 */ 19 20 /* 21 * The networking code runs off software interrupts. 22 * 23 * You can switch into the network by doing splnet() and return by splx(). 24 * The software interrupt level for the network is higher than the software 25 * level for the clock (so you can enter the network in routines called 26 * at timeout time). 27 */ 28 #if defined(vax) || defined(tahoe) 29 #define setsoftnet() mtpr(SIRR, 12) 30 #endif 31 32 /* 33 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status 34 * word which is used to de-multiplex a single software 35 * interrupt used for scheduling the network code to calls 36 * on the lowest level routine of each protocol. 37 */ 38 #define NETISR_RAW 0 /* same as AF_UNSPEC */ 39 #define NETISR_IP 2 /* same as AF_INET */ 40 #define NETISR_IMP 3 /* same as AF_IMPLINK */ 41 #define NETISR_NS 6 /* same as AF_NS */ 42 43 #define schednetisr(anisr) { netisr |= 1<<(anisr); setsoftnet(); } 44 45 #ifndef LOCORE 46 #ifdef KERNEL 47 int netisr; /* scheduling bits for network */ 48 #endif 49 #endif 50