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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 1994 John S. Dyson
* 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. 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: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
* from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30
* $FreeBSD$
*/
#ifndef _MACHINE_VMPARAM_H_
#define _MACHINE_VMPARAM_H_
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (1*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (128*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (1*1024*1024*1024) /* max stack size */
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128*1024) /* amount to grow stack */
#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
/*
* Address space layout.
*
* UltraSPARC I and II implement a 44 bit virtual address space. The address
* space is split into 2 regions at each end of the 64 bit address space, with
* an out of range "hole" in the middle. UltraSPARC III implements the full
* 64 bit virtual address space, but we don't really have any use for it and
* 43 bits of user address space is considered to be "enough", so we ignore it.
*
* Upper region: 0xffffffffffffffff
* 0xfffff80000000000
*
* Hole: 0xfffff7ffffffffff
* 0x0000080000000000
*
* Lower region: 0x000007ffffffffff
* 0x0000000000000000
*
* In general we ignore the upper region, and use the lower region as mappable
* space.
*
* We define some interesting address constants:
*
* VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and of the entire 64 bit
* address space, mostly just for convenience.
*
* VM_MIN_DIRECT_ADDRESS and VM_MAX_DIRECT_ADDRESS define the start and end
* of the direct mapped region. This maps virtual addresses to physical
* addresses directly using 4mb tlb entries, with the physical address encoded
* in the lower 43 bits of virtual address. These mappings are convenient
* because they do not require page tables, and because they never change they
* do not require tlb flushes. However, since these mappings are cacheable,
* we must ensure that all pages accessed this way are either not double
* mapped, or that all other mappings have virtual color equal to physical
* color, in order to avoid creating illegal aliases in the data cache.
*
* VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of
* mappable kernel virtual address space. VM_MIN_KERNEL_ADDRESS is basically
* arbitrary, a convenient address is chosen which allows both the kernel text
* and data and the prom's address space to be mapped with 1 4mb tsb page.
* VM_MAX_KERNEL_ADDRESS is variable, computed at startup time based on the
* amount of physical memory available. Each 4mb tsb page provides 1g of
* virtual address space, with the only practical limit being available
* phsyical memory.
*
* VM_MIN_PROM_ADDRESS and VM_MAX_PROM_ADDRESS define the start and end of the
* prom address space. On startup the prom's mappings are duplicated in the
* kernel tsb, to allow prom memory to be accessed normally by the kernel.
*
* VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the
* user address space. There are some hardware errata about using addresses
* at the boundary of the va hole, so we allow just under 43 bits of user
* address space. Note that the kernel and user address spaces overlap, but
* this doesn't matter because they use different tlb contexts, and because
* the kernel address space is not mapped into each process' address space.
*/
#define VM_MIN_ADDRESS (0x0000000000000000UL)
#define VM_MAX_ADDRESS (0xffffffffffffffffUL)
#define VM_MIN_DIRECT_ADDRESS (0xfffff80000000000UL)
#define VM_MAX_DIRECT_ADDRESS (VM_MAX_ADDRESS)
#define VM_MIN_KERNEL_ADDRESS (0x00000000c0000000UL)
#define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
#define VM_MIN_PROM_ADDRESS (0x00000000f0000000UL)
#define VM_MAX_PROM_ADDRESS (0x00000000ffffe000UL)
#define VM_MIN_USER_ADDRESS (0x0000000000000000UL)
#define VM_MAX_USER_ADDRESS (0x000007fe00000000UL)
#define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS)
#define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS)
#define KERNBASE (VM_MIN_KERNEL_ADDRESS)
#define USRSTACK (VM_MAX_USER_ADDRESS)
/*
* Virtual size (bytes) for various kernel submaps.
*/
#ifndef VM_KMEM_SIZE
#define VM_KMEM_SIZE (16*1024*1024)
#endif
/*
* How many physical pages per KVA page allocated.
* min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
* is the total KVA space allocated for kmem_map.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (3)
#endif
/*
* Initial pagein size of beginning of executable file.
*/
#ifndef VM_INITIAL_PAGEIN
#define VM_INITIAL_PAGEIN 16
#endif
#define UMA_MD_SMALL_ALLOC
extern vm_offset_t vm_max_kernel_address;
#endif /* !_MACHINE_VMPARAM_H_ */
|
