param.h revision 1.1 1 1.1 ws /* $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws Exp $ */
2 1.1 ws
3 1.1 ws /*-
4 1.1 ws * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 1.1 ws * Copyright (C) 1995, 1996 TooLs GmbH.
6 1.1 ws * All rights reserved.
7 1.1 ws *
8 1.1 ws * Redistribution and use in source and binary forms, with or without
9 1.1 ws * modification, are permitted provided that the following conditions
10 1.1 ws * are met:
11 1.1 ws * 1. Redistributions of source code must retain the above copyright
12 1.1 ws * notice, this list of conditions and the following disclaimer.
13 1.1 ws * 2. Redistributions in binary form must reproduce the above copyright
14 1.1 ws * notice, this list of conditions and the following disclaimer in the
15 1.1 ws * documentation and/or other materials provided with the distribution.
16 1.1 ws * 3. All advertising materials mentioning features or use of this software
17 1.1 ws * must display the following acknowledgement:
18 1.1 ws * This product includes software developed by TooLs GmbH.
19 1.1 ws * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 1.1 ws * derived from this software without specific prior written permission.
21 1.1 ws *
22 1.1 ws * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 1.1 ws * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 1.1 ws * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 1.1 ws * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 1.1 ws * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 1.1 ws * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 1.1 ws * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 1.1 ws * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 1.1 ws * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 1.1 ws * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 1.1 ws */
33 1.1 ws
34 1.1 ws #ifdef _KERNEL
35 1.1 ws #ifndef _LOCORE
36 1.1 ws #include <machine/cpu.h>
37 1.1 ws #endif /* _LOCORE */
38 1.1 ws #endif
39 1.1 ws
40 1.1 ws /*
41 1.1 ws * Machine dependent constants for PowerPC (32-bit only currently)
42 1.1 ws */
43 1.1 ws #define MACHINE "powerpc"
44 1.1 ws #define MACHINE_ARCH "powerpc"
45 1.1 ws #define MID_MACHINE MID_POWERPC
46 1.1 ws
47 1.1 ws #define ALIGNBYTES (sizeof(double) - 1)
48 1.1 ws #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
49 1.1 ws
50 1.1 ws #define PGSHIFT 12
51 1.1 ws #define NBPG (1 << PGSHIFT) /* Page size */
52 1.1 ws #define PGOFSET (NBPG - 1)
53 1.1 ws
54 1.1 ws #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
55 1.1 ws #define DEV_BSIZE (1 << DEV_BSHIFT)
56 1.1 ws #define BLKDEV_IOSIZE NBPG
57 1.1 ws #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
58 1.1 ws
59 1.1 ws #define CLSIZELOG2 0
60 1.1 ws #define CLSIZE (1 << CLSIZELOG2)
61 1.1 ws
62 1.1 ws #define UPAGES 4
63 1.1 ws #define USPACE (UPAGES * NBPG)
64 1.1 ws
65 1.1 ws #define KERNBASE 0x100000
66 1.1 ws
67 1.1 ws /*
68 1.1 ws * Constants related to network buffer management.
69 1.1 ws * MCLBYTES must be no larger than CLBYTES (the software page size), and,
70 1.1 ws * on machines that exchange pages of input or output buffers with mbuf
71 1.1 ws * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
72 1.1 ws * of the hardware page size.
73 1.1 ws */
74 1.1 ws #define MSIZE 128 /* size of an mbuf */
75 1.1 ws #define MCLSHIFT 11 /* convert bytes to m_buf clusters */
76 1.1 ws #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
77 1.1 ws
78 1.1 ws #ifndef NMBCLUSTERS
79 1.1 ws #ifdef GATEWAY
80 1.1 ws #define NMBCLUSTERS 512 /* map size, max cluster allocation */
81 1.1 ws #else
82 1.1 ws #define NMBCLUSTERS 256 /* map size, max cluster allocation */
83 1.1 ws #endif
84 1.1 ws #endif
85 1.1 ws
86 1.1 ws /*
87 1.1 ws * Size of kernel malloc arena in CLBYTES-sized logical pages.
88 1.1 ws */
89 1.1 ws #ifndef NKMEMCLUSTERS
90 1.1 ws #define NKMEMCLUSTERS (128 * 1024 * 1024 / CLBYTES)
91 1.1 ws #endif
92 1.1 ws
93 1.1 ws /*
94 1.1 ws * pages ("clicks") to disk blocks
95 1.1 ws */
96 1.1 ws #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
97 1.1 ws #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
98 1.1 ws /*
99 1.1 ws * bytes to pages
100 1.1 ws */
101 1.1 ws #define ctob(x) ((x) << PGSHIFT)
102 1.1 ws #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
103 1.1 ws
104 1.1 ws /*
105 1.1 ws * bytes to disk blocks
106 1.1 ws */
107 1.1 ws #define dbtob(x) ((x) << DEV_BSHIFT)
108 1.1 ws #define btodb(x) ((x) >> DEV_BSHIFT)
109 1.1 ws
110 1.1 ws /*
111 1.1 ws * Segment handling stuff
112 1.1 ws */
113 1.1 ws #define SEGMENT_LENGTH 0x10000000
114 1.1 ws #define SEGMENT_MASK 0xf0000000
115 1.1 ws
116 1.1 ws /*
117 1.1 ws * Fixed segments
118 1.1 ws */
119 1.1 ws #define USER_SR 13
120 1.1 ws #define KERNEL_SR 14
121 1.1 ws #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR)
122 1.1 ws #define EMPTY_SEGMENT 0xfffff0
123 1.1 ws #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT))
124 1.1 ws
125 1.1 ws /*
126 1.1 ws * Some system constants
127 1.1 ws */
128 1.1 ws #ifndef HTABENTS
129 1.1 ws #define HTABENTS 1024 /* Number of hashslots in HTAB */
130 1.1 ws #endif
131 1.1 ws #ifndef NPMAPS
132 1.1 ws #define NPMAPS 32768 /* Number of pmaps in system */
133 1.1 ws #endif
134 1.1 ws
135 1.1 ws /*
136 1.1 ws * Temporary kludge till we do (ov)bcopy in assembler
137 1.1 ws */
138 1.1 ws #define ovbcopy bcopy
139