1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 1988 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD$
34 */
35
36 #ifndef _MACHINE_VMPARAM_H_
37 #define _MACHINE_VMPARAM_H_
38
39 /*
40 * Machine dependent constants for ARM.
41 */
42
43 /*
44 * Virtual memory related constants, all in bytes
45 */
46 #ifndef MAXTSIZ
47 #define MAXTSIZ (256UL*1024*1024) /* max text size */
48 #endif
49 #ifndef DFLDSIZ
50 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
51 #endif
52 #ifndef MAXDSIZ
53 #define MAXDSIZ (512UL*1024*1024) /* max data size */
54 #endif
55 #ifndef DFLSSIZ
56 #define DFLSSIZ (4UL*1024*1024) /* initial stack size limit */
57 #endif
58 #ifndef MAXSSIZ
59 #define MAXSSIZ (64UL*1024*1024) /* max stack size */
60 #endif
61 #ifndef SGROWSIZ
62 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
63 #endif
64
65 /*
66 * Address space constants
67 */
68
69 /*
70 * The line between user space and kernel space
71 * Mappings >= KERNEL_BASE are constant across all processes
72 */
73 #ifndef KERNBASE
74 #define KERNBASE 0xc0000000
75 #endif
76
77 /*
78 * The virtual address the kernel is linked to run at. For armv4/5 platforms
79 * the low-order 30 bits of this must match the low-order bits of the physical
80 * address the kernel is loaded at, so the value is most often provided as a
81 * kernel config option in the std.platform file. For armv6/7 the kernel can
82 * be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB
83 * boundary. It is typically overridden in the std.platform file only when
84 * KERNBASE is also set to a lower address to provide more KVA.
85 */
86 #ifndef KERNVIRTADDR
87 #define KERNVIRTADDR 0xc0000000
88 #endif
89
90 /*
91 * max number of non-contig chunks of physical RAM you can have
92 */
93
94 #define VM_PHYSSEG_MAX 32
95
96 /*
97 * The physical address space may be sparsely populated on some ARM systems.
98 */
99 #define VM_PHYSSEG_SPARSE
100
101 /*
102 * Create one free page pool. Since the ARM kernel virtual address
103 * space does not include a mapping onto the machine's entire physical
104 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
105 * pool, VM_FREEPOOL_DEFAULT.
106 */
107 #define VM_NFREEPOOL 1
108 #define VM_FREEPOOL_DEFAULT 0
109 #define VM_FREEPOOL_DIRECT 0
110
111 /*
112 * We need just one free list: DEFAULT.
113 */
114 #define VM_NFREELIST 1
115 #define VM_FREELIST_DEFAULT 0
116
117 /*
118 * The largest allocation size is 1MB.
119 */
120 #define VM_NFREEORDER 9
121
122 /*
123 * Enable superpage reservations: 1 level.
124 */
125 #ifndef VM_NRESERVLEVEL
126 #define VM_NRESERVLEVEL 1
127 #endif
128
129 /*
130 * Level 0 reservations consist of 256 pages.
131 */
132 #ifndef VM_LEVEL_0_ORDER
133 #define VM_LEVEL_0_ORDER 8
134 #endif
135
136 #define VM_MIN_ADDRESS (0x00001000)
137 #ifndef VM_MAXUSER_ADDRESS
138 #define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
139 #endif
140 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
141
142 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
143 #define USRSTACK SHAREDPAGE
144
145 /* initial pagein size of beginning of executable file */
146 #ifndef VM_INITIAL_PAGEIN
147 #define VM_INITIAL_PAGEIN 16
148 #endif
149
150 #ifndef VM_MIN_KERNEL_ADDRESS
151 #define VM_MIN_KERNEL_ADDRESS KERNBASE
152 #endif
153
154 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
155
156 /*
157 * How many physical pages per kmem arena virtual page.
158 */
159 #ifndef VM_KMEM_SIZE_SCALE
160 #define VM_KMEM_SIZE_SCALE (3)
161 #endif
162
163 /*
164 * Optional floor (in bytes) on the size of the kmem arena.
165 */
166 #ifndef VM_KMEM_SIZE_MIN
167 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
168 #endif
169
170 /*
171 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
172 * 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 extern vm_offset_t vm_max_kernel_address;
180
181 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
182
183 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
184 #define VM_MAX_AUTOTUNE_MAXUSERS 384
185 #endif
186
187 #define SFBUF
188 #define SFBUF_MAP
189
190 #define PMAP_HAS_DMAP 0
191 #define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
192 #define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; })
193
194 #define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
195
196 /*
197 * No non-transparent large page support in the pmap.
198 */
199 #define PMAP_HAS_LARGEPAGES 0
200
201 /*
202 * Need a page dump array for minidump.
203 */
204 #define MINIDUMP_PAGE_TRACKING 1
205
206 #endif /* _MACHINE_VMPARAM_H_ */
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