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b688fc87 WJ |
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 |