FreeBSD/Linux Kernel Cross Reference
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: releng/5.0/sys/net/netisr.h 100763 2002-07-27 19:53:02Z rwatson $
     */
    
    #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).
     */
    
    /*
     * 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_POLL     0               /* polling callback, must be first */
    #define NETISR_IP       2               /* same as AF_INET */
    #define NETISR_NS       6               /* same as AF_NS */
    #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_USB      25              /* USB soft interrupt */
    #define NETISR_PPP      27              /* PPP soft interrupt */
    #define NETISR_IPV6     28              /* same as AF_INET6 */
    #define NETISR_NATM     29              /* same as AF_NATM */
    #define NETISR_ATM      30              /* same as AF_ATM */
    #define NETISR_NETGRAPH 31              /* same as AF_NETGRAPH */
    
    
    #ifndef LOCORE
    #ifdef _KERNEL
    
    void legacy_setsoftnet(void);
    
    extern volatile unsigned int    netisr; /* scheduling bits for network */
    extern  void    (*netisrs[32])(void);
    #define schednetisr(anisr) do {                                         \
            atomic_set_rel_int(&netisr, 1 << (anisr));                      \
            legacy_setsoftnet();                                            \
    } while (0)
    
    typedef void netisr_t(void);
    
    int register_netisr(int, netisr_t *);
    int unregister_netisr(int);
    
    #endif
    #endif
    
    #endif

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