param.h revision 1.31 
1/*	$NetBSD: param.h,v 1.31 2019/01/07 22:00:30 jdolecek Exp $	*/
2/*      $OpenBSD: param.h,v 1.9 1997/04/30 09:54:15 niklas Exp $ */
3
4/*
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1992, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department and Ralph Campbell.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	from: Utah Hdr: machparam.h 1.11 89/08/14
38 *	from: @(#)param.h	8.1 (Berkeley) 6/10/93
39 */
40
41#ifndef _ARC_PARAM_H_
42#define _ARC_PARAM_H_
43
44/*
45 * Machine-dependent constants (VM, etc) common across MIPS cpus
46 */
47#define	_MACHINE	arc
48#define	MACHINE		"arc"
49
50#include <mips/mips_param.h>
51
52/*
53 * Machine dependent constants for ARC BIOS MIPS machines:
54 *	Acer Labs PICA_61
55 *	Deskstation rPC44
56 *	Deskstation Tyne
57 *	Etc
58 */
59#define	KERNBASE	0x80000000	/* start of kernel virtual */
60#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
61
62#define	SSIZE		1		/* initial stack size/NBPG */
63#define	SINCR		1		/* increment of stack/NBPG */
64
65#if defined(_LOCORE) && defined(notyet)
66#define	UADDR		0xffffffffffffc000	/* address of u */
67#else
68#define	UADDR		0xffffc000	/* address of u */
69#endif
70#define USPACE		(UPAGES*NBPG)	/* size of u-area in bytes */
71#define	UVPN		(UADDR>>PGSHIFT)/* virtual page number of u */
72#define	KERNELSTACK	(UADDR+UPAGES*NBPG)	/* top of kernel stack */
73
74/*
75 * Constants related to network buffer management.
76 * MCLBYTES must be no larger than NBPG (the software page size), and,
77 * on machines that exchange pages of input or output buffers with mbuf
78 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
79 * of the hardware page size.
80 */
81#define	MSIZE		256		/* size of an mbuf */
82
83#ifndef MCLSHIFT
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
90/* bytes to disk blocks */
91#define	btodb(x)	((x) >> DEV_BSHIFT)
92#define dbtob(x)	((x) << DEV_BSHIFT)
93
94#ifdef _KERNEL
95#ifndef _LOCORE
96
97extern int cpuspeed;
98void delay(unsigned int n);
99
100#define	DELAY(n)	delay(n)
101
102#include <machine/intr.h>
103
104#endif /* _LOCORE */
105#endif /* _KERNEL */
106
107#endif /* _ARC_PARAM_H_ */
108