freebsd-skq/sys/net/netisr.h

/*
 * Copyright (c) 1980, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)netisr.h	8.1 (Berkeley) 6/10/93
 * $FreeBSD$
 */

#ifndef _NET_NETISR_H_
#define _NET_NETISR_H_

/*
 * 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).
 */
#if defined(vax) || defined(tahoe)
#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_ISO	7		/* same as AF_ISO */
#define	NETISR_CCITT	10		/* same as AF_CCITT */
#define NETISR_ATALK    16              /* same as AF_APPLETALK */
#define	NETISR_ARP	18		/* same as AF_LINK */
#define NETISR_IPX	23		/* same as AF_IPX */
#define	NETISR_ISDN	26		/* same as AF_E164 */
#define	NETISR_PPP	27		/* PPP soft interrupt */
#define	NETISR_NATM	29		/* same as AF_NATM */

#define	schednetisr(anisr)	{ netisr |= 1<<(anisr); setsoftnet(); }

#ifndef LOCORE
#ifdef KERNEL
extern volatile unsigned int	netisr;	/* scheduling bits for network */

typedef void netisr_t __P((void));

struct netisrtab {
	int nit_num;
	netisr_t *nit_isr;
};

int register_netisr __P((int, netisr_t *));
void netisr_sysinit __P((void *));

#define NETISR_SET(num, isr) \
	static struct netisrtab nisr_##num = { num, isr }; \
	SYSINIT(nisr_##num, SI_SUB_CPU, SI_ORDER_ANY, netisr_sysinit, &nisr_##num)
#endif
#endif

#endif