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/11.2/sys/arm/include/vmparam.h 331722 2018-03-29 02:50:57Z eadler $
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 (256UL*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 * The virtual address the kernel is linked to run at. For armv4/5 platforms
77 * the low-order 30 bits of this must match the low-order bits of the physical
78 * address the kernel is loaded at, so the value is most often provided as a
79 * kernel config option in the std.platform file. For armv6/7 the kernel can
80 * be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB
81 * boundary. It is typically overridden in the std.platform file only when
82 * KERNBASE is also set to a lower address to provide more KVA.
83 */
84 #ifndef KERNVIRTADDR
85 #define KERNVIRTADDR 0xc0000000
86 #endif
87
88 /*
89 * max number of non-contig chunks of physical RAM you can have
90 */
91
92 #define VM_PHYSSEG_MAX 32
93
94 /*
95 * The physical address space may be sparsely populated on some ARM systems.
96 */
97 #define VM_PHYSSEG_SPARSE
98
99 /*
100 * Create one free page pool. Since the ARM kernel virtual address
101 * space does not include a mapping onto the machine's entire physical
102 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
103 * pool, VM_FREEPOOL_DEFAULT.
104 */
105 #define VM_NFREEPOOL 1
106 #define VM_FREEPOOL_DEFAULT 0
107 #define VM_FREEPOOL_DIRECT 0
108
109 /*
110 * We need just one free list: DEFAULT.
111 */
112 #define VM_NFREELIST 1
113 #define VM_FREELIST_DEFAULT 0
114
115 /*
116 * The largest allocation size is 1MB.
117 */
118 #define VM_NFREEORDER 9
119
120 /*
121 * Enable superpage reservations: 1 level.
122 */
123 #ifndef VM_NRESERVLEVEL
124 #define VM_NRESERVLEVEL 1
125 #endif
126
127 /*
128 * Level 0 reservations consist of 256 pages.
129 */
130 #ifndef VM_LEVEL_0_ORDER
131 #define VM_LEVEL_0_ORDER 8
132 #endif
133
134 #define VM_MIN_ADDRESS (0x00001000)
135 #ifndef VM_MAXUSER_ADDRESS
136 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
137 #endif
138 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
139
140 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
141 #define USRSTACK SHAREDPAGE
142
143 /* initial pagein size of beginning of executable file */
144 #ifndef VM_INITIAL_PAGEIN
145 #define VM_INITIAL_PAGEIN 16
146 #endif
147
148 #ifndef VM_MIN_KERNEL_ADDRESS
149 #define VM_MIN_KERNEL_ADDRESS KERNBASE
150 #endif
151
152 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
153
154 /*
155 * How many physical pages per kmem arena virtual page.
156 */
157 #ifndef VM_KMEM_SIZE_SCALE
158 #define VM_KMEM_SIZE_SCALE (3)
159 #endif
160
161 /*
162 * Optional floor (in bytes) on the size of the kmem arena.
163 */
164 #ifndef VM_KMEM_SIZE_MIN
165 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
166 #endif
167
168 /*
169 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
170 * kernel map.
171 */
172 #ifndef VM_KMEM_SIZE_MAX
173 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
174 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
175 #endif
176
177 extern vm_offset_t vm_max_kernel_address;
178
179 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
180
181 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
182 #define VM_MAX_AUTOTUNE_MAXUSERS 384
183 #endif
184
185 #define SFBUF
186 #define SFBUF_MAP
187
188 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
189
190 #endif /* _MACHINE_VMPARAM_H_ */
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