vmparam.h revision 1.20 
1/*	$NetBSD: vmparam.h,v 1.20 2017/02/02 21:50:23 rin 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 _NEWS68K_VMPARAM_H_
42#define	_NEWS68K_VMPARAM_H_
43
44/*
45 * Machine dependent constants for news68k
46 */
47
48/*
49 * We use 4K pages on the news68k.  Override the PAGE_* definitions
50 * to be compile time constants.
51 */
52#define	PAGE_SHIFT	PGSHIFT
53#define	PAGE_SIZE	(1 << PAGE_SHIFT)
54#define	PAGE_MASK	(PAGE_SIZE - 1)
55
56/*
57 * USRSTACK is the top (end) of the user stack.
58 *
59 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
60 * is for HPUX compatibility.  Why??  Because HPUX's debuggers
61 * have the user's stack hard-wired at FFF00000 for post-mortems,
62 * and we must be compatible...
63 */
64#define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
65#define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
66#define P1PAGES		0x100000
67#define HIGHPAGES	(0x100000/PAGE_SIZE)
68
69/*
70 * Virtual memory related constants, all in bytes
71 */
72#ifndef MAXTSIZ
73#define	MAXTSIZ		(8*1024*1024)		/* max text size */
74#endif
75#ifndef DFLDSIZ
76#define	DFLDSIZ		(16*1024*1024)		/* initial data size limit */
77#endif
78#ifndef MAXDSIZ
79#define	MAXDSIZ		(64*1024*1024)		/* max data size */
80#endif
81#ifndef	DFLSSIZ
82#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
83#endif
84#ifndef	MAXSSIZ
85#define	MAXSSIZ		MAXDSIZ			/* max stack size */
86#endif
87
88/*
89 * PTEs for mapping user space into the kernel for phyio operations.
90 * One page is enough to handle 4Mb of simultaneous raw IO operations.
91 */
92#ifndef USRIOSIZE
93#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
94#endif
95
96/*
97 * Mach derived constants
98 */
99
100/* user/kernel map constants */
101#define VM_MIN_ADDRESS		((vaddr_t)0)
102#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
103#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
104#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
105#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0xC0000000-PAGE_SIZE*NPTEPG))
106
107/* virtual sizes (bytes) for various kernel submaps */
108#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
109
110/* # of kernel PT pages (initial only, can grow dynamically) */
111#define VM_KERNEL_PT_PAGES	((vsize_t)2)
112
113/*
114 * Constants which control the way the VM system deals with memory segments.
115 * The news68k only has one physical memory segment?
116 */
117#define	VM_PHYSSEG_MAX		1
118#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
119
120#define	VM_NFREELIST		1
121#define	VM_FREELIST_DEFAULT	0
122
123#define	__HAVE_PMAP_PHYSSEG
124
125/*
126 * pmap-specific data stored in the vm_physmem[] array.
127 */
128struct pmap_physseg {
129	struct pv_header *pvheader;	/* pv table for this seg */
130};
131
132#endif /* _NEWS68K_VMPARAM_H_ */
133