netisr.h revision 1817 
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 * $Id$
35 */
36
37/*
38 * The networking code runs off software interrupts.
39 *
40 * You can switch into the network by doing splnet() and return by splx().
41 * The software interrupt level for the network is higher than the software
42 * level for the clock (so you can enter the network in routines called
43 * at timeout time).
44 */
45#if defined(vax) || defined(tahoe)
46#define	setsoftnet()	mtpr(SIRR, 12)
47#endif
48
49/*
50 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
51 * word which is used to de-multiplex a single software
52 * interrupt used for scheduling the network code to calls
53 * on the lowest level routine of each protocol.
54 */
55#define	NETISR_RAW	0		/* same as AF_UNSPEC */
56#define	NETISR_IP	2		/* same as AF_INET */
57#define	NETISR_IMP	3		/* same as AF_IMPLINK */
58#define	NETISR_NS	6		/* same as AF_NS */
59#define	NETISR_ISO	7		/* same as AF_ISO */
60#define	NETISR_CCITT	10		/* same as AF_CCITT */
61#define	NETISR_ARP	18		/* same as AF_LINK */
62
63#define	schednetisr(anisr)	{ netisr |= 1<<(anisr); setsoftnet(); }
64
65#ifndef LOCORE
66#ifdef KERNEL
67volatile unsigned int	netisr;				/* scheduling bits for network */
68#endif
69#endif
70