param.h revision 1.24 
1/*	$NetBSD: param.h,v 1.24 2011/06/20 06:29:54 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#if defined(_KERNEL_OPT)
39#include "opt_ppcarch.h"
40#endif
41#endif
42
43/*
44 * Machine dependent constants for PowerPC (32-bit only currently)
45 * For userland regardless of port, force MACHINE to be "powerpc"
46 */
47#ifndef _KERNEL
48#undef MACHINE
49#endif
50#ifndef MACHINE
51#define	MACHINE		"powerpc"
52#endif
53#define	MACHINE_ARCH	"powerpc"
54#define	MID_MACHINE	MID_POWERPC
55
56#define	ALIGNBYTES		(sizeof(double) - 1)
57#define	ALIGN(p)		(((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
58#define	ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
59
60#ifdef PPC_IBM4XX
61#define	PGSHIFT		14	/* Use 16KB to reduce TLB thrashing */
62#define	UPAGES		1
63#else
64#define	PGSHIFT		12
65#define	UPAGES		4
66#endif
67#define	NBPG		(1 << PGSHIFT)	/* Page size */
68#define	PGOFSET		(NBPG - 1)
69
70#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
71#define	DEV_BSIZE	(1 << DEV_BSHIFT)
72#define	BLKDEV_IOSIZE	NBPG
73#ifndef MAXPHYS
74#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
75#endif
76
77#define	USPACE		(UPAGES * NBPG)
78
79#ifndef	MSGBUFSIZE
80#define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
81#endif
82
83#ifndef KERNBASE
84#define	KERNBASE	0x100000
85#endif
86
87/*
88 * Constants related to network buffer management.
89 * MCLBYTES must be no larger than NBPG (the software page size), and,
90 * on machines that exchange pages of input or output buffers with mbuf
91 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
92 * of the hardware page size.
93 */
94#ifndef MSIZE
95#ifdef _LP64
96#define	MSIZE		512		/* size of an mbuf */
97#else  /* _LP64 */
98#define	MSIZE		256		/* size of an mbuf */
99#endif /* _LP64 */
100#endif
101#ifndef MCLSHIFT
102#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
103#endif
104#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
105
106/*
107 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
108 * logical pages.
109 */
110#ifndef NKMEMPAGES_MIN_DEFAULT
111#define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
112#endif
113#ifndef NKMEMPAGES_MAX_DEFAULT
114#define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
115#endif
116
117#if defined(_KERNEL) && !defined(_LOCORE)
118#include <machine/cpu.h>
119#endif	/* _KERNEL && !_LOCORE */
120
121#endif /* _POWERPC_PARAM_H_ */
122