param.h revision 1.27 
1/*	$NetBSD: param.h,v 1.27 1999/02/09 17:15:52 tv Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department and Ralph Campbell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by the University of
23 *	California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: Utah Hdr: machparam.h 1.11 89/08/14
41 *
42 *	@(#)param.h	8.1 (Berkeley) 6/10/93
43 */
44
45/*
46 * Machine-dependent constants (VM, etc) common across MIPS cpus
47 */
48
49#include <mips/mips_param.h>
50
51/*
52 * Machine dependent constants for mips-based DECstations.
53 */
54
55#define	_MACHINE_ARCH	mipsel
56#define	MACHINE_ARCH	"mipsel"
57#define	_MACHINE	pmax
58#define	MACHINE		"pmax"
59#define	MID_MACHINE	MID_PMAX
60
61#define	KERNBASE	0x80000000	/* start of kernel virtual */
62#define KERNTEXTOFF	0x80030000	/* start of kernel text for kvm_mkdb */
63#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
64
65#define	DEV_BSIZE	512
66#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
67#define BLKDEV_IOSIZE	2048
68#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
69
70#define	CLSIZE		1
71#define	CLSIZELOG2	0
72
73/*
74 * Constants related to network buffer management.
75 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
76 * on machines that exchange pages of input or output buffers with mbuf
77 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
78 * of the hardware page size.
79 */
80#define	MSIZE		128		/* size of an mbuf */
81
82#ifndef MCLSHIFT
83
84# define	MCLSHIFT	11	/* convert bytes to m_buf clusters */
85					/* 2K cluster can hold Ether frame */
86#endif	/* MCLSHIFT */
87
88#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
89#define	MCLOFSET	(MCLBYTES - 1)
90
91#ifndef NMBCLUSTERS
92
93#if defined(_KERNEL) && !defined(_LKM)
94#include "opt_gateway.h"
95#endif /* _KERNEL && ! _LKM */
96
97#ifdef GATEWAY
98#define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
99#else
100#define	NMBCLUSTERS	1024		/* map size, max cluster allocation */
101#endif
102#endif
103
104#include <machine/intr.h>
105
106#ifdef _KERNEL
107#ifndef _LOCORE
108
109extern void delay __P((int n));
110extern int cpuspeed;
111#define	DELAY(n)	{ register int N = cpuspeed * (n); while (--N > 0); }
112
113#endif	/* !_LOCORE */
114#endif	/* _KERNEL */
115