1/*	$NetBSD: vmparam.h,v 1.48 2019/03/29 20:18:09 christos 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 *	@(#)vmparam.h	8.1 (Berkeley) 6/11/93
 41 */
 42
 43#ifndef _SPARC_VMPARAM_H_
 44#define _SPARC_VMPARAM_H_
 45
 46#define __USE_TOPDOWN_VM
 47
 48/*
 49 * Machine dependent constants for SPARC
 50 */
 51
 52#include <machine/cpuconf.h>
 53
 54/*
 55 * Sun4 systems have a 8K page size.  All other platforms have a
 56 * 4K page size.  We need to define these upper and lower limits
 57 * for machine-independent code.  We also try to make PAGE_SIZE,
 58 * PAGE_SHIFT, and PAGE_MASK into compile-time constants, if we can.
 59 *
 60 * XXX Should garbage-collect the version of this from <machine/param.h>.
 61 */
 62#define	PAGE_SHIFT_SUN4		13
 63#define	PAGE_SHIFT_SUN4CM	12
 64
 65#define MAX_PAGE_SHIFT		PAGE_SHIFT_SUN4
 66#define MIN_PAGE_SHIFT		PAGE_SHIFT_SUN4CM
 67
 68#define	MIN_PAGE_SIZE		(1 << MIN_PAGE_SHIFT)
 69#define	MAX_PAGE_SIZE		(1 << MAX_PAGE_SHIFT)
 70
 71#if CPU_NTYPES != 0 && !defined(SUN4)
 72#define	PAGE_SHIFT		PAGE_SHIFT_SUN4CM
 73#elif CPU_NTYPES == 1 && defined(SUN4)
 74#define	PAGE_SHIFT		PAGE_SHIFT_SUN4
 75#endif
 76
 77#ifdef	PAGE_SHIFT
 78#define	PAGE_SIZE		(1 << PAGE_SHIFT)
 79#define	PAGE_MASK		(PAGE_SIZE - 1)
 80#endif
 81
 82/*
 83 * USRSTACK is the top (end) of the user stack.
 84 */
 85#define	USRSTACK	KERNBASE		/* Start of user stack */
 86
 87/*
 88 * Virtual memory related constants, all in bytes
 89 */
 90#ifndef MAXTSIZ
 91#define	MAXTSIZ		(64*1024*1024)		/* max text size */
 92#endif
 93#ifndef DFLDSIZ
 94#define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
 95#endif
 96#ifndef MAXDSIZ
 97#define	MAXDSIZ		(512*1024*1024)		/* max data size */
 98#endif
 99#ifndef	DFLSSIZ
100#define	DFLSSIZ		(8*1024*1024)		/* initial stack size limit */
101#endif
102#ifndef	MAXSSIZ
103#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
104#endif
105
106/*
107 * Mach derived constants
108 */
109
110/*
111 * User/kernel map constants.  Note that sparc/vaddrs.h defines the
112 * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS:
113 * tread with care.
114 */
115#define VM_MIN_ADDRESS		((vaddr_t)0)
116#define VM_MAX_ADDRESS		((vaddr_t)KERNBASE)
117#define VM_MAXUSER_ADDRESS	((vaddr_t)KERNBASE)
118#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
119#define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)KERNEND)
120
121#define VM_PHYSSEG_MAX		32       /* up to 32 segments */
122#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
123
124#define	VM_NFREELIST		1
125#define	VM_FREELIST_DEFAULT	0
126
127#endif /* _SPARC_VMPARAM_H_ */