vmparam.h revision 1.29 
1/*	$NetBSD: vmparam.h,v 1.29 2001/06/02 01:19:29 chs 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. All advertising materials mentioning features or use of this software
25 *    must display the following acknowledgement:
26 *	This product includes software developed by the University of
27 *	California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 *    may be used to endorse or promote products derived from this software
30 *    without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 *	@(#)vmparam.h	8.1 (Berkeley) 6/11/93
45 */
46
47#ifndef _SPARC_VMPARAM_H_
48#define _SPARC_VMPARAM_H_
49
50/*
51 * Machine dependent constants for Sun-4c SPARC
52 */
53
54#include <machine/param.h>
55
56/*
57 * USRTEXT is the start of the user text/data space, while USRSTACK
58 * is the top (end) of the user stack.
59 */
60#define	USRTEXT		0x2000			/* Start of user text */
61#define	USRSTACK	KERNBASE		/* Start of user stack */
62
63/*
64 * Virtual memory related constants, all in bytes
65 */
66#ifndef MAXTSIZ
67#define	MAXTSIZ		(64*1024*1024)		/* max text size */
68#endif
69#ifndef DFLDSIZ
70#define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
71#endif
72#ifndef MAXDSIZ
73#define	MAXDSIZ		(256*1024*1024)		/* max data size */
74#endif
75#ifndef	DFLSSIZ
76#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
77#endif
78#ifndef	MAXSSIZ
79#define	MAXSSIZ		MAXDSIZ			/* max stack size */
80#endif
81
82/*
83 * Size of shared memory map
84 */
85#ifndef SHMMAXPGS
86#define SHMMAXPGS	1024
87#endif
88
89/*
90 * The time for a process to be blocked before being very swappable.
91 * This is a number of seconds which the system takes as being a non-trivial
92 * amount of real time.  You probably shouldn't change this;
93 * it is used in subtle ways (fractions and multiples of it are, that is, like
94 * half of a ``long time'', almost a long time, etc.)
95 * It is related to human patience and other factors which don't really
96 * change over time.
97 */
98#define	MAXSLP 		20
99
100/*
101 * Mach derived constants
102 */
103
104/*
105 * User/kernel map constants.  Note that sparc/vaddrs.h defines the
106 * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS:
107 * tread with care.
108 */
109#define VM_MIN_ADDRESS		((vaddr_t)0)
110#define VM_MAX_ADDRESS		((vaddr_t)KERNBASE)
111#define VM_MAXUSER_ADDRESS	((vaddr_t)KERNBASE)
112#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
113#define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)KERNEND)
114
115#define VM_PHYSSEG_MAX		32       /* up to 32 segments */
116#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
117#define VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */
118
119#define	VM_NFREELIST		1
120#define	VM_FREELIST_DEFAULT	0
121
122#if !defined(_LKM)
123/*
124 * Make the VM PAGE_* macros constants, if possible.
125 */
126#if NBPG == 4096 || NBPG == 8192
127#define PAGE_SIZE	NBPG
128#define PAGE_SHIFT	PGSHIFT
129#define PAGE_MASK	(NBPG-1)
130#endif
131#endif /* _LKM */
132
133#define	__HAVE_PMAP_PHYSSEG
134
135/*
136 * pmap specific data stored in the vm_physmem[] array
137 */
138struct pvlist;
139struct pmap_physseg {
140	struct pvlist *pvhead;
141};
142#endif /* _SPARC_VMPARAM_H_ */
143