1 /* $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
2 /* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department and Ralph Campbell.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * from: Utah Hdr: vmparam.h 1.16 91/01/18
38 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94
39 * JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish
43 #ifndef _MACHINE_VMPARAM_H_
44 #define _MACHINE_VMPARAM_H_
47 * Machine dependent constants mips processors.
50 * USRTEXT is the start of the user text/data space, while USRSTACK
51 * is the top (end) of the user stack.
53 #define USRTEXT (1*PAGE_SIZE)
55 * USRSTACK needs to start a little below 0x8000000 because the R8000
56 * and some QED CPUs perform some virtual address checks before the
57 * offset is calculated.
59 #define USRSTACK 0x7ffff000 /* Start of user stack */
62 * Virtual memory related constants, all in bytes
65 #define MAXTSIZ (128UL*1024*1024) /* max text size */
68 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
71 #define MAXDSIZ (1*1024UL*1024*1024) /* max data size */
74 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
77 #define MAXSSIZ (64UL*1024*1024) /* max stack size */
80 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
84 * The time for a process to be blocked before being very swappable.
85 * This is a number of seconds which the system takes as being a non-trivial
86 * amount of real time. You probably shouldn't change this;
87 * it is used in subtle ways (fractions and multiples of it are, that is, like
88 * half of a ``long time'', almost a long time, etc.)
89 * It is related to human patience and other factors which don't really
95 * Mach derived constants
98 /* user/kernel map constants */
99 #define VM_MIN_ADDRESS ((vm_offset_t)0x00000000)
100 #define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000)
101 #define VM_MAX_MMAP_ADDR VM_MAXUSER_ADDRESS
102 #define VM_MAX_ADDRESS ((vm_offset_t)0x80000000)
104 #ifndef VM_KERNEL_ALLOC_OFFSET
105 #define VM_KERNEL_ALLOC_OFFSET ((vm_offset_t)0x00000000)
108 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000)
109 #define VM_KERNEL_WIRED_ADDR_END (VM_MIN_KERNEL_ADDRESS + VM_KERNEL_ALLOC_OFFSET)
110 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000)
113 * Disable superpage reservations. (not sure if this is right
114 * I copied it from ARM)
116 #ifndef VM_NRESERVLEVEL
117 #define VM_NRESERVLEVEL 0
121 /* virtual sizes (bytes) for various kernel submaps */
123 #define VM_KMEM_SIZE (12 * 1024 * 1024)
127 * How many physical pages per KVA page allocated.
128 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
129 * is the total KVA space allocated for kmem_map.
131 #ifndef VM_KMEM_SIZE_SCALE
132 #define VM_KMEM_SIZE_SCALE (3)
136 * Ceiling on amount of kmem_map kva space.
138 #ifndef VM_KMEM_SIZE_MAX
139 #define VM_KMEM_SIZE_MAX (200 * 1024 * 1024)
142 /* initial pagein size of beginning of executable file */
143 #ifndef VM_INITIAL_PAGEIN
144 #define VM_INITIAL_PAGEIN 16
148 * max number of non-contig chunks of physical RAM you can have
150 #define VM_PHYSSEG_MAX 32
153 * The physical address space is densely populated.
155 #define VM_PHYSSEG_DENSE
158 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
159 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
160 * the pool from which physical pages for small UMA objects are
163 #define VM_NFREEPOOL 3
164 #define VM_FREEPOOL_CACHE 2
165 #define VM_FREEPOOL_DEFAULT 0
166 #define VM_FREEPOOL_DIRECT 1
169 * we support 1 free list:
171 * - DEFAULT for all systems
174 #define VM_NFREELIST 1
175 #define VM_FREELIST_DEFAULT 0
178 * The largest allocation size is 1MB.
180 #define VM_NFREEORDER 9
183 * XXXMIPS: This values need to be changed!!!
186 #define VM_MIN_ADDRESS ((vm_offset_t)0x0000000000010000)
187 #define VM_MAXUSER_ADDRESS ((vm_offset_t)MIPS_KSEG0_START-1)
188 #define VM_MAX_ADDRESS ((vm_offset_t)0x0000000100000000)
189 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)MIPS_KSEG3_START)
190 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)MIPS_KSEG3_END)
191 #define KERNBASE (VM_MIN_KERNEL_ADDRESS)
193 /* virtual sizes (bytes) for various kernel submaps */
194 #define VM_KMEM_SIZE (16*1024*1024) /* XXX ??? */
197 #define NBSEG 0x400000 /* bytes/segment */
198 #define SEGOFSET (NBSEG-1) /* byte offset into segment */
199 #define SEGSHIFT 22 /* LOG2(NBSEG) */
201 #endif /* !_MACHINE_VMPARAM_H_ */