netisr.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*	@(#)netisr.h	4.3	(ULTRIX)	9/4/90	*/

/************************************************************************
 *									*
 *			Copyright (c) 1983 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
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 *   This software is furnished under a license and may be used and	*
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 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
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 *   The information in this software is subject to change  without	*
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 *   Equipment Corporation.						*
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 ************************************************************************/
/*
 * 09-Nov-89	jaw
 *	add atomic acess to netisr for SMP..
 *
 * 15-Jan-88	lp
 *	Added isr define for appletalk
 */

/*	netisr.h	6.1	83/07/29	*/

/*
 * The networking code runs off software interrupts.
 *
 * You can switch into the network by doing splnet() and return by splx().
 * The software interrupt level for the network is higher than the software
 * level for the clock (so you can enter the network in routines called
 * at timeout time).
 */
#ifdef KERNEL
#include "../h/ansi_compat.h"
#else
#include <ansi_compat.h>
#endif

#ifdef __vax
#define	setsoftnet()	mtpr(SIRR, 12)
#endif

/*
 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
 * word which is used to de-multiplex a single software
 * interrupt used for scheduling the network code to calls
 * on the lowest level routine of each protocol.
 */
#define	NETISR_RAW	0		/* same as AF_UNSPEC */
#define	NETISR_IP	2		/* same as AF_INET */
#define NETISR_IMP	3		/* same as AF_IMPLINK */
#define	NETISR_NS	6		/* same as AF_NS */
#define	NETISR_ND	7		/* network disk protocol */
#define NETISR_DDP	9		/* Appletalk */
#define NETISR_DN	12		/* same as AF_DECnet */
#define NETISR_DLI	13		/* same as AF_DLI */
#define NETISR_LAT	14		/* same as AF_LAT */
#define NETISR_BSC	15		/* same as AF_BSC */
#define NETISR_DLO      19              /* same as AF_OSI */

#define	schednetisr(anisr)	{ set_bit_atomic(anisr,&netisr); setsoftnet(); }

#ifndef LOCORE
#ifdef KERNEL
int	netisr;				/* scheduling bits for network */
#endif
#endif