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_ */