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/10.0/sys/arm/include/vmparam.h 254915 2013-08-26 16:23:54Z raj $
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 #define KERNBASE 0xc0000000
72
73 /*
74 * max number of non-contig chunks of physical RAM you can have
75 */
76
77 #define VM_PHYSSEG_MAX 32
78
79 /*
80 * The physical address space is densely populated.
81 */
82 #define VM_PHYSSEG_DENSE
83
84 /*
85 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
86 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
87 * the pool from which physical pages for small UMA objects are
88 * allocated.
89 */
90 #define VM_NFREEPOOL 3
91 #define VM_FREEPOOL_CACHE 2
92 #define VM_FREEPOOL_DEFAULT 0
93 #define VM_FREEPOOL_DIRECT 1
94
95 /*
96 * we support 2 free lists:
97 *
98 * - DEFAULT for all systems
99 * - ISADMA for the ISA DMA range on Sharks only
100 */
101
102 #define VM_NFREELIST 2
103 #define VM_FREELIST_DEFAULT 0
104 #define VM_FREELIST_ISADMA 1
105
106 /*
107 * The largest allocation size is 1MB.
108 */
109 #define VM_NFREEORDER 9
110
111 /*
112 * Enable superpage reservations: 1 level.
113 */
114 #ifndef VM_NRESERVLEVEL
115 #define VM_NRESERVLEVEL 1
116 #endif
117
118 /*
119 * Level 0 reservations consist of 256 pages.
120 */
121 #ifndef VM_LEVEL_0_ORDER
122 #define VM_LEVEL_0_ORDER 8
123 #endif
124
125 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0)
126 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0)
127
128 #define VM_MIN_ADDRESS (0x00001000)
129 #ifdef ARM_USE_SMALL_ALLOC
130 /*
131 * ARM_KERN_DIRECTMAP is used to make sure there's enough space between
132 * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory.
133 * It has to be a compile-time constant, even if arm_init_smallalloc(),
134 * which will do the mapping, gets the real amount of memory at runtime,
135 * because VM_MAXUSER_ADDRESS is a constant.
136 */
137 #ifndef ARM_KERN_DIRECTMAP
138 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */
139 #endif
140 #define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP
141 #else /* ARM_USE_SMALL_ALLOC */
142 #ifndef VM_MAXUSER_ADDRESS
143 #define VM_MAXUSER_ADDRESS KERNBASE
144 #endif /* VM_MAXUSER_ADDRESS */
145 #endif /* ARM_USE_SMALL_ALLOC */
146 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
147
148 #define USRSTACK VM_MAXUSER_ADDRESS
149
150 /* initial pagein size of beginning of executable file */
151 #ifndef VM_INITIAL_PAGEIN
152 #define VM_INITIAL_PAGEIN 16
153 #endif
154
155 #ifndef VM_MIN_KERNEL_ADDRESS
156 #define VM_MIN_KERNEL_ADDRESS KERNBASE
157 #endif
158
159 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
160
161 /*
162 * Virtual size (bytes) for various kernel submaps.
163 */
164 #ifndef VM_KMEM_SIZE
165 #define VM_KMEM_SIZE (12*1024*1024)
166 #endif
167 #ifndef VM_KMEM_SIZE_SCALE
168 #define VM_KMEM_SIZE_SCALE (3)
169 #endif
170
171 /*
172 * Ceiling on the size of the kmem submap: 40% of the kernel map.
173 */
174 #ifndef VM_KMEM_SIZE_MAX
175 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
176 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
177 #endif
178
179 #ifdef ARM_USE_SMALL_ALLOC
180 #define UMA_MD_SMALL_ALLOC
181 #endif /* ARM_USE_SMALL_ALLOC */
182
183 extern vm_offset_t vm_max_kernel_address;
184
185 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
186
187 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
188 #define VM_MAX_AUTOTUNE_MAXUSERS 384
189 #endif
190
191 #endif /* _MACHINE_VMPARAM_H_ */
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