1/*	$NetBSD: vmparam.h,v 1.46 2020/02/01 19:41:49 tsutsui Exp $	*/
  2
  3/*
  4 * Copyright (c) 1988 University of Utah.
  5 * Copyright (c) 1982, 1990 The Regents of the University of California.
  6 * 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
 37/*-
 38 * Copyright (C) 1993	Allen K. Briggs, Chris P. Caputo,
 39 *			Michael L. Finch, Bradley A. Grantham, and
 40 *			Lawrence A. Kesteloot
 41 * All rights reserved.
 42 *
 43 * Redistribution and use in source and binary forms, with or without
 44 * modification, are permitted provided that the following conditions
 45 * are met:
 46 * 1. Redistributions of source code must retain the above copyright
 47 *    notice, this list of conditions and the following disclaimer.
 48 * 2. Redistributions in binary form must reproduce the above copyright
 49 *    notice, this list of conditions and the following disclaimer in the
 50 *    documentation and/or other materials provided with the distribution.
 51 * 3. All advertising materials mentioning features or use of this software
 52 *    must display the following acknowledgement:
 53 *	This product includes software developed by the Alice Group.
 54 * 4. The names of the Alice Group or any of its members may not be used
 55 *    to endorse or promote products derived from this software without
 56 *    specific prior written permission.
 57 *
 58 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 61 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 67 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 68 *
 69 */
 70/*
 71 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
 72 *
 73 *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
 74 */
 75
 76#ifndef _MAC68K_VMPARAM_H_
 77#define	_MAC68K_VMPARAM_H_
 78
 79/*
 80 * Machine dependent constants for mac68k -- mostly derived from hp300.
 81 */
 82
 83/*
 84 * Use common m68k definitions to define PAGE_SIZE and related constants.
 85 */
 86#include <m68k/vmparam.h>
 87
 88/*
 89 * USRSTACK is the top (end) of the user stack.
 90 *
 91 * NOTE: HP300 uses HIGHPAGES == (0x100000/PAGE_SIZE) for HP/UX compatibility.
 92 * Do we care?  Obviously not at the moment.
 93 */
 94#define	USRSTACK	(-HIGHPAGES*PAGE_SIZE)	/* Start of user stack */
 95#define	BTOPUSRSTACK	(0x100000-HIGHPAGES)	/* btop(USRSTACK) */
 96#define P1PAGES		0x100000
 97#define HIGHPAGES	3			/* UPAGES */
 98
 99/*
100 * Virtual memory related constants, all in bytes
101 */
102#ifndef MAXTSIZ
103#define	MAXTSIZ		(32*1024*1024)		/* max text size */
104#endif
105#ifndef DFLDSIZ
106#define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
107#endif
108#ifndef MAXDSIZ
109#define	MAXDSIZ		(64*1024*1024)		/* max data size */
110#endif
111#ifndef	DFLSSIZ
112#define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
113#endif
114#ifndef	MAXSSIZ
115#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
116#endif
117
118/*
119 * PTEs for mapping user space into the kernel for phyio operations.
120 * One page is enough to handle 4Mb of simultaneous raw IO operations.
121 */
122#ifndef USRIOSIZE
123#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
124#endif
125
126/*
127 * Mach derived constants
128 */
129
130/* user/kernel map constants */
131#define VM_MIN_ADDRESS		((vaddr_t)0)
132#define VM_MAXUSER_ADDRESS	((vaddr_t)(USRSTACK))
133#define VM_MAX_ADDRESS		((vaddr_t)(0-(UPAGES*PAGE_SIZE)))
134#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
135#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0-PAGE_SIZE*NPTEPG))
136
137/* virtual sizes (bytes) for various kernel submaps */
138#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
139
140/* # of kernel PT pages (initial only, can grow dynamically) */
141#define VM_KERNEL_PT_PAGES	((vsize_t)2)
142
143/*
144 * Constants which control the way the VM system deals with memory segments.
145 * Most mac68k systems have only 1 physical memory segment, but some have 2.
146 *
147 * On the systems that have multiple segments, specifically the IIsi and
148 * IIci, the optimal configuration is to put the higher-density SIMMs in
149 * bank B.  This is because the on-board video uses main memory in bank A
150 * for the framebuffer, and a memory controller prevents access during
151 * video refresh cycles.  Even if both banks contain the same amount of
152 * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
153 * for the framebuffer (if on-board video is in use).
154 */
155#define	VM_PHYSSEG_MAX		2
156#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
157
158#define	VM_NFREELIST		1
159#define	VM_FREELIST_DEFAULT	0
160
161#define	__HAVE_PMAP_PHYSSEG
162
163/*
164 * pmap-specific data stored in the vm_physmem[] array.
165 */
166struct pmap_physseg {
167	struct pv_header *pvheader;	/* pv table for this seg */
168};
169
170#endif /* _MAC68K_VMPARAM_H_ */