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Annotation of Net2/net/netisr.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
        !             3:  * 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    7.8 (Berkeley) 5/7/91
        !            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: 
        !            61: #define        schednetisr(anisr)      { netisr |= 1<<(anisr); setsoftnet(); }
        !            62: 
        !            63: #ifdef i386
        !            64: /* XXX Temporary -- soon to vanish - wfj */
        !            65: #define        NETISR_SCLK     11              /* softclock */
        !            66: #define        NETISR_AST      12              /* ast -- resched */
        !            67: 
        !            68: #undef schednetisr
        !            69: #define        schednetisr(anisr)      {\
        !            70:        if(netisr == 0) { \
        !            71:                softem++; \
        !            72:        } \
        !            73:        netisr |= 1<<(anisr); \
        !            74: }
        !            75: #ifndef LOCORE
        !            76: #ifdef KERNEL
        !            77: int    softem; 
        !            78: #endif
        !            79: #endif
        !            80: #endif /* i386 */
        !            81: 
        !            82: #ifndef LOCORE
        !            83: #ifdef KERNEL
        !            84: int    netisr;                         /* scheduling bits for network */
        !            85: #endif
        !            86: #endif

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