netisr.h revision 1541
1/* 2 * Copyright (c) 1980, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)netisr.h 8.1 (Berkeley) 6/10/93 34 */ 35 36/* 37 * The networking code runs off software interrupts. 38 * 39 * You can switch into the network by doing splnet() and return by splx(). 40 * The software interrupt level for the network is higher than the software 41 * level for the clock (so you can enter the network in routines called 42 * at timeout time). 43 */ 44#if defined(vax) || defined(tahoe) 45#define setsoftnet() mtpr(SIRR, 12) 46#endif 47 48/* 49 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status 50 * word which is used to de-multiplex a single software 51 * interrupt used for scheduling the network code to calls 52 * on the lowest level routine of each protocol. 53 */ 54#define NETISR_RAW 0 /* same as AF_UNSPEC */ 55#define NETISR_IP 2 /* same as AF_INET */ 56#define NETISR_IMP 3 /* same as AF_IMPLINK */ 57#define NETISR_NS 6 /* same as AF_NS */ 58#define NETISR_ISO 7 /* same as AF_ISO */ 59#define NETISR_CCITT 10 /* same as AF_CCITT */ 60#define NETISR_ARP 18 /* same as AF_LINK */ 61 62#define schednetisr(anisr) { netisr |= 1<<(anisr); setsoftnet(); } 63 64#ifdef i386 65/* XXX Temporary -- soon to vanish - wfj */ 66#define NETISR_SCLK 11 /* softclock */ 67#define NETISR_AST 12 /* ast -- resched */ 68 69#undef schednetisr 70#define schednetisr(anisr) {\ 71 if(netisr == 0) { \ 72 softem++; \ 73 } \ 74 netisr |= 1<<(anisr); \ 75} 76#ifndef LOCORE 77#ifdef KERNEL 78int softem; 79#endif 80#endif 81#endif /* i386 */ 82 83#ifndef LOCORE 84#ifdef KERNEL 85int netisr; /* scheduling bits for network */ 86#endif 87#endif 88