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
|
/* $OpenBSD: vmparam.h,v 1.28 2003/06/02 23:27:47 millert Exp $ */
/* $NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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. 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.
*
* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
*/
#ifndef _MACHINE_VM_PARAM_H_
#define _MACHINE_VM_PARAM_H_
/*
* Machine dependent constants for 386.
*/
/*
* Virtual address space arrangement. On 386, both user and kernel
* share the address space, not unlike the vax.
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack. Immediately above the user stack
* resides the user structure, which is UPAGES long and contains the
* kernel stack.
*
* Immediately after the user structure is the page table map, and then
* kernal address space.
*/
#define USRTEXT PAGE_SIZE
#define USRSTACK VM_MAXUSER_ADDRESS
/*
* Virtual memory related constants, all in bytes
*/
#define MAXTSIZ (64*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (64*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
/* I386 has a line where all code is executable: 0 - I386_MAX_EXE_ADDR */
#define I386_MAX_EXE_ADDR 0x20000000 /* exec line */
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 2048
#endif
/*
* Size of User Raw I/O map
*/
#define USRIOSIZE 300
/*
* 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
/* XXX Compatibility */
#define APTDPTDI PDSLOT_APTE
#define PTDPTDI PDSLOT_PTE
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAXUSER_ADDRESS ((vaddr_t)((PTDPTDI<<PDSHIFT) - USPACE))
#define VM_MAX_ADDRESS ((vaddr_t)((PTDPTDI<<PDSHIFT) + (PTDPTDI<<PGSHIFT)))
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(APTDPTDI<<PDSHIFT))
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
#define VM_PHYSSEG_MAX 4 /* actually we could have this many segments */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
#define VM_NFREELIST 2
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_FIRST16 1
/*
* pmap specific data stored in the vm_physmem[] array
*/
#define __HAVE_PMAP_PHYSSEG
struct pmap_physseg {
struct pv_head *pvhead; /* pv_head array */
char *attrs; /* attrs array */
};
#endif /* _MACHINE_VM_PARAM_H_ */
|
