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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 | * | |
faea1114 | 6 | * @(#)param.h 7.12 (Berkeley) %G% |
da7c5cc6 | 7 | */ |
4c542963 SL |
8 | |
9 | /* | |
9487ea54 | 10 | * Machine dependent constants for VAX. |
4c542963 | 11 | */ |
49c8d125 KB |
12 | #define MACHINE "vax" |
13 | ||
5eb07204 | 14 | #ifndef BYTE_ORDER |
9487ea54 KB |
15 | #include <machine/endian.h> |
16 | #endif | |
17 | ||
d58c675e | 18 | #include <machine/machlimits.h> |
153bfc58 | 19 | |
58b14b46 MK |
20 | #define KERNBASE 0x80000000 /* start of kernel virtual */ |
21 | #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) | |
22 | ||
5e09dfcf MK |
23 | #define NBPG 512 /* bytes/page */ |
24 | #define PGOFSET (NBPG-1) /* byte offset into page */ | |
25 | #define PGSHIFT 9 /* LOG2(NBPG) */ | |
26 | #define NPTEPG (NBPG/(sizeof (struct pte))) | |
27 | ||
9487ea54 KB |
28 | #define KERNBASE 0x80000000 /* start of kernel virtual */ |
29 | #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) | |
30 | ||
dd94cc44 | 31 | #ifndef SECSIZE |
5e09dfcf MK |
32 | #define DEV_BSIZE 512 |
33 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ | |
34 | #define BLKDEV_IOSIZE 2048 | |
58b14b46 | 35 | #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ |
dd94cc44 MK |
36 | #else SECSIZE |
37 | /* | |
38 | * Devices without disk labels and the swap virtual device | |
39 | * use "blocks" of exactly pagesize. Devices with disk labels | |
40 | * use device-dependent sector sizes for block and character interfaces. | |
41 | */ | |
42 | #define DEV_BSIZE NBPG | |
43 | #define DEV_BSHIFT PGSHIFT /* log2(DEV_BSIZE) */ | |
44 | #define BLKDEV_IOSIZE NBPG /* NBPG for unlabeled block devices */ | |
45 | #endif SECSIZE | |
46 | #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ | |
4c542963 SL |
47 | |
48 | #define CLSIZE 2 | |
49 | #define CLSIZELOG2 1 | |
50 | ||
5e09dfcf MK |
51 | #define SSIZE 4 /* initial stack size/NBPG */ |
52 | #define SINCR 4 /* increment of stack/NBPG */ | |
4c542963 | 53 | |
faea1114 | 54 | #define UPAGES 12 /* pages of u-area */ |
4c542963 | 55 | |
d58c675e MK |
56 | /* |
57 | * Constants related to network buffer management. | |
58 | * MCLBYTES must be no larger than CLBYTES (the software page size), and, | |
59 | * on machines that exchange pages of input or output buffers with mbuf | |
60 | * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple | |
61 | * of the hardware page size. | |
62 | */ | |
63 | #define MSIZE 128 /* size of an mbuf */ | |
64 | #define MAPPED_MBUFS /* can do scatter-gather I/O */ | |
65 | #if CLBYTES > 1024 | |
66 | #define MCLBYTES 1024 | |
67 | #define MCLSHIFT 10 | |
68 | #define MCLOFSET (MCLBYTES - 1) | |
69 | #else | |
70 | #define MCLBYTES CLBYTES | |
71 | #define MCLSHIFT CLSHIFT | |
72 | #define MCLOFSET CLOFSET | |
73 | #endif | |
74 | #ifdef GATEWAY | |
75 | #define NMBCLUSTERS 512 /* map size, max cluster allocation */ | |
76 | #else | |
77 | #define NMBCLUSTERS 256 /* map size, max cluster allocation */ | |
78 | #endif | |
79 | ||
4c542963 SL |
80 | /* |
81 | * Some macros for units conversion | |
82 | */ | |
83 | /* Core clicks (512 bytes) to segments and vice versa */ | |
84 | #define ctos(x) (x) | |
85 | #define stoc(x) (x) | |
86 | ||
dd94cc44 | 87 | #ifndef SECSIZE |
4c542963 SL |
88 | /* Core clicks (512 bytes) to disk blocks */ |
89 | #define ctod(x) (x) | |
90 | #define dtoc(x) (x) | |
dd94cc44 MK |
91 | #define dtob(x) ((x)<<PGSHIFT) |
92 | #else SECSIZE | |
93 | /* Core clicks (512 bytes) to disk blocks; deprecated */ | |
94 | #define ctod(x) (x) /* XXX */ | |
95 | #define dtoc(x) (x) /* XXX */ | |
96 | #define dtob(x) ((x)<<PGSHIFT) /* XXX */ | |
97 | #endif SECSIZE | |
4c542963 SL |
98 | |
99 | /* clicks to bytes */ | |
100 | #define ctob(x) ((x)<<9) | |
101 | ||
102 | /* bytes to clicks */ | |
103 | #define btoc(x) ((((unsigned)(x)+511)>>9)) | |
104 | ||
dd94cc44 | 105 | #ifndef SECSIZE |
5e09dfcf MK |
106 | #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ |
107 | ((unsigned)(bytes) >> DEV_BSHIFT) | |
108 | #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ | |
109 | ((unsigned)(db) << DEV_BSHIFT) | |
110 | ||
111 | /* | |
112 | * Map a ``block device block'' to a file system block. | |
113 | * This should be device dependent, and will be if we | |
114 | * add an entry to cdevsw/bdevsw for that purpose. | |
115 | * For now though just use DEV_BSIZE. | |
116 | */ | |
117 | #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) | |
dd94cc44 MK |
118 | #else SECSIZE |
119 | /* bytes to "disk blocks" and back; deprecated */ | |
120 | #define btodb(bytes) ((unsigned)(bytes) >> DEV_BSHIFT) /* XXX */ | |
121 | #define dbtob(db) ((unsigned)(db) << DEV_BSHIFT) /* XXX */ | |
122 | #endif SECSIZE | |
5e09dfcf | 123 | |
4c542963 SL |
124 | /* |
125 | * Macros to decode processor status word. | |
126 | */ | |
127 | #define USERMODE(ps) (((ps) & PSL_CURMOD) == PSL_CURMOD) | |
8664db0b | 128 | #define BASEPRI(ps) (((ps) & PSL_IPL) == 0) |
4c542963 | 129 | |
3327052b MK |
130 | #ifdef KERNEL |
131 | #ifndef LOCORE | |
132 | int cpuspeed; | |
3327052b | 133 | #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } |
837583eb | 134 | #endif |
3327052b MK |
135 | |
136 | #else KERNEL | |
4c542963 | 137 | #define DELAY(n) { register int N = (n); while (--N > 0); } |
3327052b | 138 | #endif KERNEL |