1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
2
3 /*-
4 * Copyright (c) 1988 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD: releng/10.2/sys/arm/include/vmparam.h 283339 2015-05-23 23:27:00Z ian $
32 */
33
34 #ifndef _MACHINE_VMPARAM_H_
35 #define _MACHINE_VMPARAM_H_
36
37 /*
38 * Machine dependent constants for ARM.
39 */
40
41 /*
42 * Virtual memory related constants, all in bytes
43 */
44 #ifndef MAXTSIZ
45 #define MAXTSIZ (64UL*1024*1024) /* max text size */
46 #endif
47 #ifndef DFLDSIZ
48 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
49 #endif
50 #ifndef MAXDSIZ
51 #define MAXDSIZ (512UL*1024*1024) /* max data size */
52 #endif
53 #ifndef DFLSSIZ
54 #define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */
55 #endif
56 #ifndef MAXSSIZ
57 #define MAXSSIZ (8UL*1024*1024) /* max stack size */
58 #endif
59 #ifndef SGROWSIZ
60 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
61 #endif
62
63 /*
64 * Address space constants
65 */
66
67 /*
68 * The line between user space and kernel space
69 * Mappings >= KERNEL_BASE are constant across all processes
70 */
71 #ifndef KERNBASE
72 #define KERNBASE 0xc0000000
73 #endif
74
75 /*
76 * max number of non-contig chunks of physical RAM you can have
77 */
78
79 #define VM_PHYSSEG_MAX 32
80
81 /*
82 * The physical address space may be sparsely populated on some ARM systems.
83 */
84 #define VM_PHYSSEG_SPARSE
85
86 /*
87 * Create two free page pools. Since the ARM kernel virtual address
88 * space does not include a mapping onto the machine's entire physical
89 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
90 * pool, VM_FREEPOOL_DEFAULT.
91 */
92 #define VM_NFREEPOOL 2
93 #define VM_FREEPOOL_CACHE 1
94 #define VM_FREEPOOL_DEFAULT 0
95 #define VM_FREEPOOL_DIRECT 0
96
97 /*
98 * We need just one free list: DEFAULT.
99 */
100 #define VM_NFREELIST 1
101 #define VM_FREELIST_DEFAULT 0
102
103 /*
104 * The largest allocation size is 1MB.
105 */
106 #define VM_NFREEORDER 9
107
108 /*
109 * Enable superpage reservations: 1 level.
110 */
111 #ifndef VM_NRESERVLEVEL
112 #define VM_NRESERVLEVEL 1
113 #endif
114
115 /*
116 * Level 0 reservations consist of 256 pages.
117 */
118 #ifndef VM_LEVEL_0_ORDER
119 #define VM_LEVEL_0_ORDER 8
120 #endif
121
122 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0)
123 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0)
124
125 #define VM_MIN_ADDRESS (0x00001000)
126 #ifndef VM_MAXUSER_ADDRESS
127 #define VM_MAXUSER_ADDRESS KERNBASE
128 #endif /* VM_MAXUSER_ADDRESS */
129 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
130
131 #define USRSTACK VM_MAXUSER_ADDRESS
132
133 /* initial pagein size of beginning of executable file */
134 #ifndef VM_INITIAL_PAGEIN
135 #define VM_INITIAL_PAGEIN 16
136 #endif
137
138 #ifndef VM_MIN_KERNEL_ADDRESS
139 #define VM_MIN_KERNEL_ADDRESS KERNBASE
140 #endif
141
142 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
143
144 /*
145 * How many physical pages per kmem arena virtual page.
146 */
147 #ifndef VM_KMEM_SIZE_SCALE
148 #define VM_KMEM_SIZE_SCALE (3)
149 #endif
150
151 /*
152 * Optional floor (in bytes) on the size of the kmem arena.
153 */
154 #ifndef VM_KMEM_SIZE_MIN
155 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
156 #endif
157
158 /*
159 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
160 * kernel map.
161 */
162 #ifndef VM_KMEM_SIZE_MAX
163 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
164 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
165 #endif
166
167 extern vm_offset_t vm_max_kernel_address;
168
169 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
170
171 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
172 #define VM_MAX_AUTOTUNE_MAXUSERS 384
173 #endif
174
175 #endif /* _MACHINE_VMPARAM_H_ */
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