1/*	$NetBSD: vmparam.h,v 1.38 2020/02/01 19:41:49 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 _MVME68K_VMPARAM_H_
42#define _MVME68K_VMPARAM_H_
43
44/*
45 * Machine dependent constants for MVME68K
46 */
47
48/*
49 * Use common m68k definitions to define PAGE_SIZE and related constants.
50 */
51#include <m68k/vmparam.h>
52
53/*
54 * USRSTACK is the top (end) of the user stack.
55 *
56 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
57 * is for HPUX compatibility.  Why??  Because HPUX's debuggers
58 * have the user's stack hard-wired at FFF00000 for post-mortems,
59 * and we must be compatible...
60 */
61#define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
62#define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
63#define	P1PAGES		0x100000
64#define	HIGHPAGES	(0x100000/PAGE_SIZE)
65
66/*
67 * Virtual memory related constants, all in bytes
68 */
69#ifndef MAXTSIZ
70#define	MAXTSIZ		(32*1024*1024)		/* max text size */
71#endif
72#ifndef DFLDSIZ
73#define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
74#endif
75#ifndef MAXDSIZ
76#define	MAXDSIZ		(64*1024*1024)		/* max data size */
77#endif
78#ifndef	DFLSSIZ
79#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
80#endif
81#ifndef	MAXSSIZ
82#define	MAXSSIZ		MAXDSIZ			/* max stack size */
83#endif
84
85/*
86 * PTEs for mapping user space into the kernel for phyio operations.
87 * One page is enough to handle 4Mb of simultaneous raw IO operations.
88 */
89#ifndef USRIOSIZE
90#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
91#endif
92
93/*
94 * Mach derived constants
95 */
96
97/* user/kernel map constants */
98#define VM_MIN_ADDRESS		((vaddr_t)0)
99#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFF00000)
100#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
101#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
102#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0-PAGE_SIZE*NPTEPG))
103
104/* virtual sizes (bytes) for various kernel submaps */
105#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
106
107/* # of kernel PT pages (initial only, can grow dynamically) */
108#define VM_KERNEL_PT_PAGES	((vsize_t)2)
109
110/*
111 * Constants which control the way the VM system deals with memory segments.
112 * The mvme68k port has two physical memory segments: 1 for onboard RAM
113 * and another for contiguous VMEbus RAM.
114 */
115#define	VM_PHYSSEG_MAX		2
116#define	VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
117
118#define	VM_NFREELIST		2
119#define	VM_FREELIST_DEFAULT	0
120#define	VM_FREELIST_VMEMEM	1
121
122#define	__HAVE_PMAP_PHYSSEG
123
124/*
125 * pmap-specific data stored in the vm_physmem[] array.
126 */
127struct pmap_physseg {
128	struct pv_header *pvheader;	/* pv table for this seg */
129};
130
131#endif /* _MVME68K_VMPARAM_H_ */
132