param.h revision 1.30 1 /* $NetBSD: param.h,v 1.30 1995/11/10 22:04:48 gwr Exp $ */
2
3 /*
4 * Copyright (c) 1994, 1995 Gordon W. Ross
5 * Copyright (c) 1993 Adam Glass
6 * Copyright (c) 1988 University of Utah.
7 * Copyright (c) 1982, 1986, 1990, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * the Systems Programming Group of the University of Utah Computer
12 * Science Department.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by the University of
25 * California, Berkeley and its contributors.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 *
42 * from: Utah Hdr: machparam.h 1.16 92/12/20
43 * from: @(#)param.h 8.1 (Berkeley) 6/10/93
44 */
45
46 #ifndef MACHINE
47
48 /*
49 * Machine dependent constants for the Sun3 series.
50 */
51 #define MACHINE "sun3"
52 #define MACHINE_ARCH "m68k"
53 #define MID_MACHINE MID_M68K
54
55 /*
56 * Round p (pointer or byte index) up to a correctly-aligned value
57 * for all data types (int, long, ...). The result is u_int and
58 * must be cast to any desired pointer type.
59 */
60 #define ALIGNBYTES 3
61 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
62
63 #define NBPG 8192 /* bytes/page */
64 #define PGOFSET (NBPG-1) /* byte offset into page */
65 #define PGSHIFT 13 /* LOG2(NBPG) */
66
67 #define NBSG 0x20000 /* bytes/segment */
68 #define SEGOFSET (NBSG-1) /* byte offset into segment */
69 #define SEGSHIFT 17 /* LOG2(NBSG) */
70
71 #define KERNBASE 0x0E000000 /* start of kernel virtual */
72 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
73 #define KERNTEXTOFF 0x0E004000 /* start of kernel text */
74
75 #define DEV_BSIZE 512
76 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
77 #define BLKDEV_IOSIZE 2048
78 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
79
80 #define CLSIZE 1
81 #define CLSIZELOG2 0
82
83 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
84 #define SSIZE 1 /* initial stack size/NBPG */
85 #define SINCR 1 /* increment of stack/NBPG */
86
87 #define UPAGES 2 /* pages of u-area */
88 #define USPACE (UPAGES << PGSHIFT)
89
90 /*
91 * Constants related to network buffer management.
92 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
93 * on machines that exchange pages of input or output buffers with mbuf
94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
95 * of the hardware page size.
96 */
97 #define MSIZE 128 /* size of an mbuf */
98 #define MCLBYTES 2048 /* large enough for ether MTU */
99 #define MCLSHIFT 11
100 #define MCLOFSET (MCLBYTES - 1)
101 #ifndef NMBCLUSTERS
102 #ifdef GATEWAY
103 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
104 #else
105 #define NMBCLUSTERS 256 /* map size, max cluster allocation */
106 #endif
107 #endif
108
109 /*
110 * Size of kernel malloc arena in CLBYTES-sized logical pages
111 */
112 #ifndef NKMEMCLUSTERS
113 #define NKMEMCLUSTERS (2048*1024/CLBYTES)
114 #endif
115
116 /* pages ("clicks") to disk blocks */
117 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
118 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
119
120 /* pages to bytes */
121 #define ctob(x) ((x) << PGSHIFT)
122 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
123
124 /* bytes to disk blocks */
125 #define btodb(x) ((x) >> DEV_BSHIFT)
126 #define dbtob(x) ((x) << DEV_BSHIFT)
127
128 /*
129 * Map a ``block device block'' to a file system block.
130 * This should be device dependent, and should use the bsize
131 * field from the disk label.
132 * For now though just use DEV_BSIZE.
133 */
134 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
135
136 /*
137 * Mach derived conversion macros
138 */
139 #define sun3_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET)
140 #define sun3_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET)
141 #define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT)
142 #define sun3_stob(x) ((unsigned)(x) << SEGSHIFT)
143
144 #define sun3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
145 #define sun3_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
146 #define sun3_btop(x) ((unsigned)(x) >> PGSHIFT)
147 #define sun3_ptob(x) ((unsigned)(x) << PGSHIFT)
148
149 /* XXX - Does this really belong here? -gwr */
150 #include <machine/psl.h>
151
152 #ifdef _KERNEL
153 #ifndef LOCORE
154 #define DELAY(n) delay(n)
155 extern int cpuspeed;
156 static inline void delay2us()
157 {
158 register int n = cpuspeed;
159
160 __asm __volatile ("0: subql #4,%0; jgt 0b" : "=d" (n) : "0" (n));
161 }
162 #endif /* !LOCORE */
163 #endif /* _KERNEL */
164
165 #endif /* MACHINE */
166