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
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 (4UL*1024*1024) /* initial stack size limit */
55#endif
56#ifndef MAXSSIZ
57#define MAXSSIZ (64UL*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
177extern 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 PMAP_HAS_DMAP 0
189#define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
190#define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; })
191
192#define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
193
194/*
195 * No non-transparent large page support in the pmap.
196 */
197#define PMAP_HAS_LARGEPAGES 0
198
199/*
200 * Need a page dump array for minidump.
201 */
202#define MINIDUMP_PAGE_TRACKING 1
203#define MINIDUMP_STARTUP_PAGE_TRACKING 0
204
205#endif /* _MACHINE_VMPARAM_H_ */