1/*	$NetBSD: param.h,v 1.74 2020/05/01 08:21:27 isaki Exp $ */
  2
  3/*
  4 * Copyright (c) 1992, 1993
  5 *	The Regents of the University of California.  All rights reserved.
  6 *
  7 * This software was developed by the Computer Systems Engineering group
  8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  9 * contributed to Berkeley.
 10 *
 11 * All advertising materials mentioning features or use of this software
 12 * must display the following acknowledgement:
 13 *	This product includes software developed by the University of
 14 *	California, Lawrence Berkeley Laboratory.
 15 *
 16 * Redistribution and use in source and binary forms, with or without
 17 * modification, are permitted provided that the following conditions
 18 * are met:
 19 * 1. Redistributions of source code must retain the above copyright
 20 *    notice, this list of conditions and the following disclaimer.
 21 * 2. Redistributions in binary form must reproduce the above copyright
 22 *    notice, this list of conditions and the following disclaimer in the
 23 *    documentation and/or other materials provided with the distribution.
 24 * 3. 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 *	@(#)param.h	8.1 (Berkeley) 6/11/93
 41 */
 42/*
 43 * Sun4M support by Aaron Brown, Harvard University.
 44 * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
 45 * All rights reserved.
 46 */
 47#define	_MACHINE	sparc
 48#define	MACHINE		"sparc"
 49#define	_MACHINE_ARCH	sparc
 50#define	MACHINE_ARCH	"sparc"
 51#define	MID_MACHINE	MID_SPARC
 52
 53#include <machine/cpuconf.h>		/* XXX */
 54#ifdef _KERNEL				/* XXX */
 55#ifndef _LOCORE				/* XXX */
 56#include <machine/cpu.h>		/* XXX */
 57#endif					/* XXX */
 58#endif					/* XXX */
 59
 60#define SUN4_PGSHIFT	13	/* for a sun4 machine */
 61#define SUN4CM_PGSHIFT	12	/* for a sun4c or sun4m machine */
 62
 63/*
 64 * The following variables are always defined and initialized (in locore)
 65 * so independently compiled modules (e.g. LKMs) can be used irrespective
 66 * of the `options SUN4?' combination a particular kernel was configured with.
 67 * See also the definitions of NBPG, PGOFSET and PGSHIFT below.
 68 */
 69#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
 70extern int nbpg, pgofset, pgshift;
 71#endif
 72
 73#if !(defined(PROM_AT_F0) || defined(MSIIEP))
 74#define	KERNBASE	0xf0000000	/* start of kernel virtual space */
 75#else
 76/*
 77 * JS1/OF has prom sitting in f000.0000..f007.ffff, modify kernel VA 
 78 * layout to work around that. XXX - kernel should live beyound prom on
 79 * those machines.
 80 */
 81#define	KERNBASE	0xe8000000
 82#endif
 83#define KERNEND		0xfe000000	/* end of kernel virtual space */
 84#define PROM_LOADADDR	0x00004000	/* where the prom loads us */
 85#define	KERNTEXTOFF	(KERNBASE+PROM_LOADADDR)/* start of kernel text */
 86
 87#define	SSIZE		1		/* initial stack size in pages */
 88#define	USPACE		8192
 89
 90/*
 91 * Constants related to network buffer management.
 92 * MCLBYTES must be no larger than NBPG (the software page size), and,
 93 * on machines that exchange pages of input or output buffers with mbuf
 94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 95 * of the hardware page size.
 96 */
 97#define	MSIZE		256		/* size of an mbuf */
 98
 99#ifndef MCLSHIFT
100#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
101					/* 2K cluster can hold Ether frame */
102#endif	/* MCLSHIFT */
103
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#define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
111#define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
112
113#if defined(_KERNEL) || defined(_STANDALONE)
114#ifndef _LOCORE
115
116#ifndef __HIDE_DELAY
117extern void	delay(unsigned int);
118#define	DELAY(n)	delay(n)
119#endif /* __HIDE_DELAY */
120
121#endif /* _LOCORE */
122
123/*
124 * microSPARC-IIep is a sun4m but with an integrated PCI controller.
125 * In a lot of places (like pmap &c) we want it to be treated as SUN4M.
126 * But since various low-level things are done very differently from
127 * normal sparcs (and since for now it requires a relocated kernel
128 * anyway), the MSIIEP kernels are not supposed to support any other
129 * system.  So insist on SUN4M defined and SUN4 and SUN4C not defined.
130 */
131#if defined(MSIIEP)
132#if defined(SUN4) || defined(SUN4C) || defined(SUN4D)
133#error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d"
134#endif
135#if !defined(SUN4M)
136#error "microSPARC-IIep kernel must have 'options SUN4M'"
137#endif
138#endif /* MSIIEP */
139
140/*
141 * Sun4 machines have a page size of 8192.  All other machines have a page
142 * size of 4096.  Short cut page size variables if we can.
143 */
144#if CPU_NTYPES != 0 && !defined(SUN4)
145#	define NBPG		4096
146#	define PGOFSET		(NBPG-1)
147#	define PGSHIFT		SUN4CM_PGSHIFT
148#elif CPU_NTYPES == 1 && defined(SUN4)
149#	define NBPG		8192
150#	define PGOFSET		(NBPG-1)
151#	define PGSHIFT		SUN4_PGSHIFT
152#else
153#	define NBPG		nbpg
154#	define PGOFSET		pgofset
155#	define PGSHIFT		pgshift
156#endif
157
158/* Default audio blocksize in msec.  See sys/dev/audio/audio.c */
159#define	__AUDIO_BLK_MS (40)
160
161#endif /* _KERNEL || _STANDALONE */