projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| da7c5cc6 | 1 | /* |
| 0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
| da7c5cc6 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | * | |
| 5e09dfcf | 6 | * @(#)param.h 7.4 (Berkeley) %G% |
| da7c5cc6 | 7 | */ |
| 4c542963 SL |
8 | |
| 9 | /* | |
| 10 | * Machine dependent constants for vax. | |
| 11 | */ | |
| 837583eb MK |
12 | |
| 13 | #ifndef ENDIAN | |
| 14 | /* | |
| 15 | * Definitions for byte order, | |
| 16 | * according to byte significance from low address to high. | |
| 17 | */ | |
| 18 | #define LITTLE 1234 /* least-significant byte first (vax) */ | |
| 19 | #define BIG 4321 /* most-significant byte first */ | |
| 20 | #define PDP 3412 /* LSB first in word, MSW first in long (pdp) */ | |
| 21 | #define ENDIAN LITTLE /* byte order on vax */ | |
| 22 | ||
| b410e761 MK |
23 | /* |
| 24 | * Macros for network/external number representation conversion. | |
| 25 | */ | |
| 26 | #if ENDIAN == BIG && !defined(lint) | |
| 27 | #define ntohl(x) (x) | |
| 28 | #define ntohs(x) (x) | |
| 29 | #define htonl(x) (x) | |
| 30 | #define htons(x) (x) | |
| 31 | #else | |
| 32 | u_short ntohs(), htons(); | |
| 33 | u_long ntohl(), htonl(); | |
| 34 | #endif | |
| 35 | ||
| 5e09dfcf MK |
36 | #define NBPG 512 /* bytes/page */ |
| 37 | #define PGOFSET (NBPG-1) /* byte offset into page */ | |
| 38 | #define PGSHIFT 9 /* LOG2(NBPG) */ | |
| 39 | #define NPTEPG (NBPG/(sizeof (struct pte))) | |
| 40 | ||
| 41 | #define DEV_BSIZE 512 | |
| 42 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ | |
| 43 | #define BLKDEV_IOSIZE 2048 | |
| 4c542963 SL |
44 | |
| 45 | #define CLSIZE 2 | |
| 46 | #define CLSIZELOG2 1 | |
| 47 | ||
| 5e09dfcf MK |
48 | #define SSIZE 4 /* initial stack size/NBPG */ |
| 49 | #define SINCR 4 /* increment of stack/NBPG */ | |
| 4c542963 | 50 | |
| 5e09dfcf | 51 | #define UPAGES 10 /* pages of u-area */ |
| 4c542963 SL |
52 | |
| 53 | /* | |
| 54 | * Some macros for units conversion | |
| 55 | */ | |
| 56 | /* Core clicks (512 bytes) to segments and vice versa */ | |
| 57 | #define ctos(x) (x) | |
| 58 | #define stoc(x) (x) | |
| 59 | ||
| 60 | /* Core clicks (512 bytes) to disk blocks */ | |
| 61 | #define ctod(x) (x) | |
| 62 | #define dtoc(x) (x) | |
| 63 | #define dtob(x) ((x)<<9) | |
| 64 | ||
| 65 | /* clicks to bytes */ | |
| 66 | #define ctob(x) ((x)<<9) | |
| 67 | ||
| 68 | /* bytes to clicks */ | |
| 69 | #define btoc(x) ((((unsigned)(x)+511)>>9)) | |
| 70 | ||
| 5e09dfcf MK |
71 | #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ |
| 72 | ((unsigned)(bytes) >> DEV_BSHIFT) | |
| 73 | #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ | |
| 74 | ((unsigned)(db) << DEV_BSHIFT) | |
| 75 | ||
| 76 | /* | |
| 77 | * Map a ``block device block'' to a file system block. | |
| 78 | * This should be device dependent, and will be if we | |
| 79 | * add an entry to cdevsw/bdevsw for that purpose. | |
| 80 | * For now though just use DEV_BSIZE. | |
| 81 | */ | |
| 82 | #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) | |
| 83 | ||
| 4c542963 SL |
84 | /* |
| 85 | * Macros to decode processor status word. | |
| 86 | */ | |
| 87 | #define USERMODE(ps) (((ps) & PSL_CURMOD) == PSL_CURMOD) | |
| 8664db0b | 88 | #define BASEPRI(ps) (((ps) & PSL_IPL) == 0) |
| 4c542963 | 89 | |
| 3327052b MK |
90 | #ifdef KERNEL |
| 91 | #ifndef LOCORE | |
| 92 | int cpuspeed; | |
| 3327052b | 93 | #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } |
| 837583eb | 94 | #endif |
| 3327052b MK |
95 | |
| 96 | #else KERNEL | |
| 4c542963 | 97 | #define DELAY(n) { register int N = (n); while (--N > 0); } |
| 3327052b | 98 | #endif KERNEL |
| b410e761 | 99 | #endif ENDIAN |