xref: /netbsd-src/sys/arch/bebox/include/param.h (revision 2a399c6883d870daece976daec6ffa7bb7f934ce)
1 /*	$NetBSD: param.h,v 1.1 1997/10/14 06:48:29 sakamoto Exp $	*/
2 
3 /*-
4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5  * Copyright (C) 1995, 1996 TooLs GmbH.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by TooLs GmbH.
19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #ifdef	_KERNEL
35 #ifndef	_LOCORE
36 #include <machine/cpu.h>
37 #endif	/* _LOCORE */
38 #endif
39 
40 /*
41  * Machine dependent constants for PowerPC (32-bit only currently)
42  */
43 #define	MACHINE		"bebox"
44 #define	MACHINE_ARCH	"powerpc"
45 #define	MID_MACHINE	MID_POWERPC
46 
47 #define	ALIGNBYTES		(sizeof(double) - 1)
48 #define	ALIGN(p)		(((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
49 #define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
50 
51 #define	PGSHIFT		12
52 #define	NBPG		(1 << PGSHIFT)	/* Page size */
53 #define	PGOFSET		(NBPG - 1)
54 
55 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
56 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
57 #define	BLKDEV_IOSIZE	NBPG
58 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
59 
60 #define	CLSIZELOG2	0
61 #define	CLSIZE		(1 << CLSIZELOG2)
62 
63 #define	UPAGES		4
64 #define	USPACE		(UPAGES * NBPG)
65 
66 #ifndef	MSGBUFSIZE
67 #define	MSGBUFSIZE	NBPG		/* default message buffer size */
68 #endif
69 
70 #define	KERNBASE	0x3100
71 
72 /*
73  * Constants related to network buffer management.
74  * MCLBYTES must be no larger than CLBYTES (the software page size), and,
75  * on machines that exchange pages of input or output buffers with mbuf
76  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
77  * of the hardware page size.
78  */
79 #define	MSIZE		128		/* size of an mbuf */
80 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
81 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
82 
83 #ifndef NMBCLUSTERS
84 #ifdef GATEWAY
85 #define	NMBCLUSTERS	512		/* map size, max cluster allocation */
86 #else
87 #define	NMBCLUSTERS	256		/* map size, max cluster allocation */
88 #endif
89 #endif
90 
91 /*
92  * Size of kernel malloc arena in CLBYTES-sized logical pages.
93  */
94 #ifndef	NKMEMCLUSTERS
95 #define	NKMEMCLUSTERS	(128 * 1024 * 1024 / CLBYTES)
96 #endif
97 
98 /*
99  * pages ("clicks") to disk blocks
100  */
101 #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
102 #define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
103 /*
104  * bytes to pages
105  */
106 #define	ctob(x)		((x) << PGSHIFT)
107 #define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
108 
109 /*
110  * bytes to disk blocks
111  */
112 #define	dbtob(x)	((x) << DEV_BSHIFT)
113 #define	btodb(x)	((x) >> DEV_BSHIFT)
114 
115 /*
116  * Segment handling stuff
117  */
118 #define	SEGMENT_LENGTH	0x10000000
119 #define	SEGMENT_MASK	0xf0000000
120 
121 /*
122  * Fixed segments
123  */
124 #define	USER_SR		13
125 #define	KERNEL_SR	14
126 #define	KERNEL_SEGMENT	(0xfffff0 + KERNEL_SR)
127 #define	EMPTY_SEGMENT	0xfffff0
128 #define	USER_ADDR	((void *)(USER_SR << ADDR_SR_SHFT))
129 
130 /*
131  * Some system constants
132  */
133 #ifndef	NPMAPS
134 #define	NPMAPS		32768	/* Number of pmaps in system */
135 #endif
136 
137 /*
138  * Temporary kludge till we do (ov)bcopy in assembler
139  */
140 #define	ovbcopy	bcopy
141