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1 | /* |
2 | * Copyright (c) 1992 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This software was developed by the Computer Systems Engineering group | |
6 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and | |
7 | * contributed to Berkeley. | |
8 | * | |
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9 | * All advertising materials mentioning features or use of this software |
10 | * must display the following acknowledgement: | |
11 | * This product includes software developed by the University of | |
dc41e9e6 | 12 | * California, Lawrence Berkeley Laboratory. |
b480239a | 13 | * |
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14 | * %sccs.include.redist.c% |
15 | * | |
d35066dd | 16 | * @(#)param.h 7.5 (Berkeley) %G% |
fe663dea | 17 | * |
d35066dd | 18 | * from: $Header: param.h,v 1.13 92/11/26 02:04:38 torek Exp $ (LBL) |
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19 | */ |
20 | ||
21 | /* | |
22 | * Machine dependent constants for Sun-4c (SPARCstation) | |
23 | */ | |
24 | #define MACHINE "sparc" | |
25 | ||
26 | #ifdef KERNEL /* XXX */ | |
5548a02f | 27 | #include <machine/cpu.h> /* XXX */ |
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28 | #endif /* XXX */ |
29 | ||
30 | /* | |
31 | * Round p (pointer or byte index) up to a correctly-aligned value for | |
32 | * the machine's strictest data type. The result is u_int and must be | |
33 | * cast to any desired pointer type. | |
34 | */ | |
35 | #define ALIGNBYTES 7 | |
36 | #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) | |
37 | ||
38 | #define NBPG 4096 /* bytes/page */ | |
39 | #define PGOFSET (NBPG-1) /* byte offset into page */ | |
40 | #define PGSHIFT 12 /* log2(NBPG) */ | |
41 | ||
42 | #define KERNBASE 0xf8000000 /* start of kernel virtual space */ | |
43 | #define KERNTEXTOFF 0xf8004000 /* start of kernel text */ | |
44 | #define BTOPKERNBASE ((u_long)KERNBASE >> PG_SHIFT) | |
45 | ||
46 | #define DEV_BSIZE 512 | |
47 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ | |
48 | #define BLKDEV_IOSIZE 2048 | |
49 | #define MAXPHYS (64 * 1024) | |
50 | ||
51 | #define CLSIZE 1 | |
52 | #define CLSIZELOG2 0 | |
53 | ||
54 | /* NOTE: SSIZE and UPAGES must be multiples of CLSIZE */ | |
55 | #define SSIZE 1 /* initial stack size/NBPG */ | |
56 | #define UPAGES 2 /* pages of u-area */ | |
57 | ||
58 | /* | |
59 | * Constants related to network buffer management. | |
60 | * MCLBYTES must be no larger than CLBYTES (the software page size), and, | |
61 | * on machines that exchange pages of input or output buffers with mbuf | |
62 | * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple | |
63 | * of the hardware page size. | |
64 | */ | |
65 | #define MSIZE 128 /* size of an mbuf */ | |
66 | #define MCLBYTES 2048 /* enough for whole Ethernet packet */ | |
67 | #define MCLSHIFT 11 /* log2(MCLBYTES) */ | |
68 | #define MCLOFSET (MCLBYTES - 1) | |
69 | ||
70 | #ifndef NMBCLUSTERS | |
71 | #ifdef GATEWAY | |
72 | #define NMBCLUSTERS 512 /* map size, max cluster allocation */ | |
73 | #else | |
74 | #define NMBCLUSTERS 256 /* map size, max cluster allocation */ | |
75 | #endif | |
76 | #endif | |
77 | ||
78 | /* | |
79 | * Size of kernel malloc arena in CLBYTES-sized logical pages. | |
80 | */ | |
81 | #ifndef NKMEMCLUSTERS | |
dc41e9e6 | 82 | #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) |
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83 | #endif |
84 | ||
85 | /* pages ("clicks") (4096 bytes) to disk blocks */ | |
86 | #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) | |
87 | #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) | |
88 | #define dtob(x) ((x) << DEV_BSHIFT) | |
89 | ||
90 | /* pages to bytes */ | |
91 | #define ctob(x) ((x) << PGSHIFT) | |
92 | ||
93 | /* bytes to pages */ | |
94 | #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) | |
95 | ||
96 | #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ | |
97 | ((unsigned)(bytes) >> DEV_BSHIFT) | |
98 | #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ | |
99 | ((unsigned)(db) << DEV_BSHIFT) | |
100 | ||
101 | /* | |
102 | * Map a ``block device block'' to a file system block. | |
103 | * This should be device dependent, and should use the bsize | |
104 | * field from the disk label. | |
105 | * For now though just use DEV_BSIZE. | |
106 | */ | |
107 | #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) | |
108 | ||
109 | #ifdef KERNEL | |
110 | #ifndef LOCORE | |
111 | #define DELAY(n) delay(n) | |
112 | #endif | |
113 | #else | |
114 | #define DELAY(n) { register volatile int N = (n); while (--N > 0); } | |
115 | #endif |