param.h revision 1.16 
1/*	$NetBSD: param.h,v 1.16 2003/02/03 05:15:53 matt 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#ifndef _POWERPC_PARAM_H
35#define	_POWERPC_PARAM_H
36
37#ifdef	_KERNEL
38#ifndef	_LOCORE
39#include <machine/cpu.h>
40#endif	/* _LOCORE */
41#endif
42
43/*
44 * Machine dependent constants for PowerPC (32-bit only currently)
45 */
46#ifndef MACHINE
47#define	MACHINE		"powerpc"
48#endif
49#define	MACHINE_ARCH	"powerpc"
50#define	MID_MACHINE	MID_POWERPC
51
52#define	ALIGNBYTES		(sizeof(double) - 1)
53#define	ALIGN(p)		(((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
54#define ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
55
56#define	PGSHIFT		12
57#define	NBPG		(1 << PGSHIFT)	/* Page size */
58#define	PGOFSET		(NBPG - 1)
59
60#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
61#define	DEV_BSIZE	(1 << DEV_BSHIFT)
62#define	BLKDEV_IOSIZE	NBPG
63#ifndef MAXPHYS
64#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
65#endif
66
67#define	UPAGES		4
68#define	USPACE		(UPAGES * NBPG)
69
70#ifndef	MSGBUFSIZE
71#define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
72#endif
73
74#ifndef KERNBASE
75#define	KERNBASE	0x100000
76#endif
77
78/*
79 * Constants related to network buffer management.
80 * MCLBYTES must be no larger than NBPG (the software page size), and,
81 * on machines that exchange pages of input or output buffers with mbuf
82 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
83 * of the hardware page size.
84 */
85#define	MSIZE		256		/* size of an mbuf */
86#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
87#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
88
89#ifndef NMBCLUSTERS
90
91#if defined(_KERNEL_OPT)
92#include "opt_gateway.h"
93#endif
94
95#ifdef GATEWAY
96#define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
97#else
98#define	NMBCLUSTERS	1024		/* map size, max cluster allocation */
99#endif
100#endif
101
102/*
103 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
104 * logical pages.
105 */
106#ifndef NKMEMPAGES_MIN_DEFAULT
107#define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
108#endif
109#ifndef NKMEMPAGES_MAX_DEFAULT
110#define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
111#endif
112
113/*
114 * pages ("clicks") to disk blocks
115 */
116#define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
117#define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
118/*
119 * bytes to pages
120 */
121#define	ctob(x)		((x) << PGSHIFT)
122#define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
123
124/*
125 * bytes to disk blocks
126 */
127#define	dbtob(x)	((x) << DEV_BSHIFT)
128#define	btodb(x)	((x) >> DEV_BSHIFT)
129
130#endif /* _POWERPC_PARAM_H_ */
131