1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* $OpenBSD: vmparam.h,v 1.11 2002/02/17 22:59:53 maja Exp $ */
/* $NetBSD: vmparam.h,v 1.14 1995/09/26 04:02:10 gwr Exp $ */
/*
* Copyright (c) 1994 Gordon W. Ross
* Copyright (c) 1993 Adam Glass
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
* from: @(#)vmparam.h 7.3 (Berkeley) 5/7/91
* vmparam.h,v 1.2 1993/05/22 07:58:38 cgd Exp
*/
#ifndef _MACHINE_VMPARAM_H
#define _MACHINE_VMPARAM_H
/*
* Machine dependent constants for Sun3
*
* The Sun3 has limited total kernel virtual space (32MB) and
* can not use main memory for page tables. (All active PTEs
* must be installed in special translation RAM in the MMU).
* Therefore, parameters that would normally configure the
* size of various page tables are irrelevant. Only things
* that consume portions of kernel virtual (KV) space matter,
* and those things should be chosen to conserve KV space.
*/
/*
* USRTEXT is the start of the user text/data space, while
* USRSTACK is the top (end) of the user stack.
*/
#define USRTEXT NBPG /* Start of user text */
#define USRSTACK KERNBASE /* High end of user stack */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (8*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (16*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (32*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (512*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ MAXDSIZ /* max stack size */
#endif
/*
* PTEs for mapping user space into the kernel for phyio operations.
* The actual limitation for physio requests will be the DVMA space,
* and that is fixed by hardware design at 1MB. We could make the
* physio map larger than that, but it would not buy us much.
*/
#ifndef USRIOSIZE
#define USRIOSIZE 128 /* 1 MB */
#endif
/*
* PTEs for system V style shared memory.
* This is basically slop for kmempt which we actually allocate (malloc) from.
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 512 /* 4 MB */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* Virtual memory map:
*
* 0000.0000 user space
* 0E00.0000 kernel space
* 0FE0.0000 monitor map (devices)
* 0FF0.0000 DVMA space
* 0FFE.0000 monitor RAM seg.
* 0FFF.E000 monitor RAM page
*/
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vm_offset_t)0)
#define VM_MAX_ADDRESS ((vm_offset_t)KERNBASE)
#define VM_MAXUSER_ADDRESS ((vm_offset_t)KERNBASE)
#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0x0FE00000)
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
#define VM_PHYSSEG_MAX 4
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD /* can't add memory after vm_mem_init */
/*
* pmap specific data stored in the vm_physmem[] array
*/
#define __HAVE_PMAP_PHYSSEG
struct pmap_physseg {
struct pvlist *pv_head;
};
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
#endif /* _MACHINE_VMPARAM_H */
|
