vmparam.h revision 1.22 
1/*	$NetBSD: vmparam.h,v 1.22 2019/06/28 15:17:44 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 _NEWS68K_VMPARAM_H_
42#define	_NEWS68K_VMPARAM_H_
43
44/*
45 * Machine dependent constants for news68k
46 */
47
48/*
49 * hp300 pmap derived m68k ports can use 4K or 8K pages.
50 * The page size is specified by PGSHIFT in <machine/param.h>.
51 * Override the PAGE_* definitions to be compile-time constants.
52 */
53#define	PAGE_SHIFT	PGSHIFT
54#define	PAGE_SIZE	(1 << PAGE_SHIFT)
55#define	PAGE_MASK	(PAGE_SIZE - 1)
56
57/*
58 * USRSTACK is the top (end) of the user stack.
59 *
60 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
61 * is for HPUX compatibility.  Why??  Because HPUX's debuggers
62 * have the user's stack hard-wired at FFF00000 for post-mortems,
63 * and we must be compatible...
64 */
65#define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
66#define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
67#define P1PAGES		0x100000
68#define HIGHPAGES	(0x100000/PAGE_SIZE)
69
70/*
71 * Virtual memory related constants, all in bytes
72 */
73#ifndef MAXTSIZ
74#define	MAXTSIZ		(32*1024*1024)		/* max text size */
75#endif
76#ifndef DFLDSIZ
77#define	DFLDSIZ		(16*1024*1024)		/* initial data size limit */
78#endif
79#ifndef MAXDSIZ
80#define	MAXDSIZ		(64*1024*1024)		/* max data size */
81#endif
82#ifndef	DFLSSIZ
83#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
84#endif
85#ifndef	MAXSSIZ
86#define	MAXSSIZ		MAXDSIZ			/* max stack size */
87#endif
88
89/*
90 * PTEs for mapping user space into the kernel for phyio operations.
91 * One page is enough to handle 4Mb of simultaneous raw IO operations.
92 */
93#ifndef USRIOSIZE
94#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
95#endif
96
97/*
98 * Mach derived constants
99 */
100
101/* user/kernel map constants */
102#define VM_MIN_ADDRESS		((vaddr_t)0)
103#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
104#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
105#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
106#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0xC0000000-PAGE_SIZE*NPTEPG))
107
108/* virtual sizes (bytes) for various kernel submaps */
109#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
110
111/* # of kernel PT pages (initial only, can grow dynamically) */
112#define VM_KERNEL_PT_PAGES	((vsize_t)2)
113
114/*
115 * Constants which control the way the VM system deals with memory segments.
116 * The news68k only has one physical memory segment?
117 */
118#define	VM_PHYSSEG_MAX		1
119#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
120
121#define	VM_NFREELIST		1
122#define	VM_FREELIST_DEFAULT	0
123
124#define	__HAVE_PMAP_PHYSSEG
125
126/*
127 * pmap-specific data stored in the vm_physmem[] array.
128 */
129struct pmap_physseg {
130	struct pv_header *pvheader;	/* pv table for this seg */
131};
132
133#endif /* _NEWS68K_VMPARAM_H_ */
134