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Annotation of Net2/net/netisr.h, revision 1.1.1.1

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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