1/*	$NetBSD: vmparam.h,v 1.51 2018/03/31 06:34:51 ragge Exp $	*/
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Slightly modified for the VAX port /IC
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. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
37 */
38#ifndef _VMPARAM_H_
39#define _VMPARAM_H_
40
41/*
42 * Machine dependent constants for VAX.
43 */
44
45/*
46 * We use 4K VM pages on the VAX.  Override the PAGE_* definitions
47 * to be compile-time constants.
48 */
49#define	PAGE_SHIFT	12
50#define	PAGE_SIZE	(1 << PAGE_SHIFT)
51#define	PAGE_MASK	(PAGE_SIZE - 1)
52
53/*
54 * USRSTACK is the top (end) of the user stack. Immediately above the
55 * user stack resides kernel.
56 */
57
58#define USRSTACK	KERNBASE
59
60/*
61 * Virtual memory related constants, all in bytes
62 */
63
64#ifndef MAXTSIZ
65#define MAXTSIZ		(32*1024*1024)		/* max text size */
66#endif
67#ifndef DFLDSIZ
68#define DFLDSIZ		(128*1024*1024)		/* initial data size limit */
69#endif
70#ifndef MAXDSIZ
71#define MAXDSIZ		(512*1024*1024)		/* max data size */
72#endif
73#ifndef DFLSSIZ
74#define DFLSSIZ		(512*1024)		/* initial stack size limit */
75#endif
76#ifndef MAXSSIZ
77#define MAXSSIZ		(8*1024*1024)		/* max stack size */
78#endif
79
80#define VM_PHYSSEG_MAX		1
81#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH /* XXX */
82
83#define	VM_NFREELIST		1
84#define	VM_FREELIST_DEFAULT	0
85
86/* MD round macros */
87#define	vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
88#define	vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
89
90/*
91 * Mach derived constants
92 */
93
94/* user/kernel map constants */
95#define VM_MIN_ADDRESS		((vaddr_t)0)
96#define VM_MAXUSER_ADDRESS	((vaddr_t)KERNBASE)
97#define VM_MAX_ADDRESS		((vaddr_t)KERNBASE)
98#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
99#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0xC0000000))
100
101#define __USE_TOPDOWN_VM
102
103#define	USRIOSIZE		(8 * VAX_NPTEPG)	/* 512MB */
104#define	VM_PHYS_SIZE		(USRIOSIZE*VAX_NBPG)
105
106#endif
107