vmparam.h revision 1.24 
1/*	$NetBSD: vmparam.h,v 1.24 2023/01/15 05:08:33 tsutsui Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
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 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
37 *
38 *	@(#)vmparam.h	8.2 (Berkeley) 4/19/94
39 */
40
41#ifndef _MACHINE_VMPARAM_H_
42#define _MACHINE_VMPARAM_H_
43
44/*
45 * Use common m68k definitions to define PAGE_SIZE and related constants.
46 */
47#include <m68k/vmparam.h>
48
49/*
50 * USRSTACK is the top (end) of the user stack.
51 */
52#define USRSTACK	VM_MAXUSER_ADDRESS
53
54/*
55 * Virtual memory related constants, all in bytes
56 */
57#ifndef MAXTSIZ
58#define MAXTSIZ		(32*1024*1024)		/* max text size */
59#endif
60#ifndef DFLDSIZ
61#define DFLDSIZ		(16*1024*1024)		/* initial data size limit */
62#endif
63#ifndef MAXDSIZ
64#define MAXDSIZ		(64*1024*1024)		/* max data size */
65#endif
66#ifndef	DFLSSIZ
67#define DFLSSIZ		(512*1024)		/* initial stack size limit */
68#endif
69#ifndef	MAXSSIZ
70#define MAXSSIZ		MAXDSIZ			/* max stack size */
71#endif
72
73/*
74 * PTEs for mapping user space into the kernel for phyio operations.
75 * One page is enough to handle 4Mb of simultaneous raw IO operations.
76 */
77#ifndef USRIOSIZE
78#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
79#endif
80
81/*
82 * Mach derived constants
83 */
84
85/* user/kernel map constants */
86#define VM_MIN_ADDRESS		((vaddr_t)0)
87#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
88#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
89#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
90#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0x40000000-PAGE_SIZE*NPTEPG))
91
92/* virtual sizes (bytes) for various kernel submaps */
93#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
94
95/* # of kernel PT pages (initial only, can grow dynamically) */
96#define VM_KERNEL_PT_PAGES	((vsize_t)2)
97
98/*
99 * Constants which control the way the VM system deals with memory segments.
100 * Only one physical contigous memory segment.
101 */
102#define VM_PHYSSEG_MAX		1
103#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
104
105#define VM_NFREELIST		1
106#define VM_FREELIST_DEFAULT	0
107
108#define	__HAVE_PMAP_PHYSSEG
109
110/*
111 * pmap-specific data stored in the vm_physmem[] array.
112 */
113struct pmap_physseg {
114	struct pv_header *pvheader;	/* pv table for this seg */
115};
116
117#endif /* _MACHINE_VMPARAM_H_ */
118