1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
| 1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
|
35 * $FreeBSD: head/sys/i386/include/vmparam.h 172317 2007-09-25 06:25:06Z alc $
| 35 * $FreeBSD: head/sys/i386/include/vmparam.h 174938 2007-12-27 16:45:39Z alc $
|
36 */
37
38
39#ifndef _MACHINE_VMPARAM_H_
40#define _MACHINE_VMPARAM_H_ 1
41
42/*
43 * Machine dependent constants for 386.
44 */
45
46#ifndef PAE
47#define VM_PROT_READ_IS_EXEC /* if you can read -- then you can exec */
48#endif
49
50/*
51 * Virtual memory related constants, all in bytes
52 */
53#define MAXTSIZ (128UL*1024*1024) /* max text size */
54#ifndef DFLDSIZ
55#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
56#endif
57#ifndef MAXDSIZ
58#define MAXDSIZ (512UL*1024*1024) /* max data size */
59#endif
60#ifndef DFLSSIZ
61#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
62#endif
63#ifndef MAXSSIZ
64#define MAXSSIZ (64UL*1024*1024) /* max stack size */
65#endif
66#ifndef SGROWSIZ
67#define SGROWSIZ (128UL*1024) /* amount to grow stack */
68#endif
69
70/*
71 * The time for a process to be blocked before being very swappable.
72 * This is a number of seconds which the system takes as being a non-trivial
73 * amount of real time. You probably shouldn't change this;
74 * it is used in subtle ways (fractions and multiples of it are, that is, like
75 * half of a ``long time'', almost a long time, etc.)
76 * It is related to human patience and other factors which don't really
77 * change over time.
78 */
79#define MAXSLP 20
80
81
82/*
83 * The physical address space is densely populated.
84 */
85#define VM_PHYSSEG_DENSE
86
87/*
88 * The number of PHYSSEG entries must be one greater than the number
89 * of phys_avail entries because the phys_avail entry that spans the
90 * largest physical address that is accessible by ISA DMA is split
91 * into two PHYSSEG entries.
92 */
93#define VM_PHYSSEG_MAX 17
94
95/*
96 * Create two free page pools. Since the i386 kernel virtual address
97 * space does not include a mapping onto the machine's entire physical
98 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
99 * pool, VM_FREEPOOL_DEFAULT.
100 */
101#define VM_NFREEPOOL 2
102#define VM_FREEPOOL_CACHE 1
103#define VM_FREEPOOL_DEFAULT 0
104#define VM_FREEPOOL_DIRECT 0
105
106/*
107 * Create two free page lists: VM_FREELIST_DEFAULT is for physical
108 * pages that are above the largest physical address that is
109 * accessible by ISA DMA and VM_FREELIST_ISADMA is for physical pages
110 * that are below that address.
111 */
112#define VM_NFREELIST 2
113#define VM_FREELIST_DEFAULT 0
114#define VM_FREELIST_ISADMA 1
115
116/*
117 * The largest allocation size is 2MB under PAE and 4MB otherwise.
118 */
119#ifdef PAE
120#define VM_NFREEORDER 10
121#else
122#define VM_NFREEORDER 11
123#endif
124
125/*
| 36 */
37
38
39#ifndef _MACHINE_VMPARAM_H_
40#define _MACHINE_VMPARAM_H_ 1
41
42/*
43 * Machine dependent constants for 386.
44 */
45
46#ifndef PAE
47#define VM_PROT_READ_IS_EXEC /* if you can read -- then you can exec */
48#endif
49
50/*
51 * Virtual memory related constants, all in bytes
52 */
53#define MAXTSIZ (128UL*1024*1024) /* max text size */
54#ifndef DFLDSIZ
55#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
56#endif
57#ifndef MAXDSIZ
58#define MAXDSIZ (512UL*1024*1024) /* max data size */
59#endif
60#ifndef DFLSSIZ
61#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
62#endif
63#ifndef MAXSSIZ
64#define MAXSSIZ (64UL*1024*1024) /* max stack size */
65#endif
66#ifndef SGROWSIZ
67#define SGROWSIZ (128UL*1024) /* amount to grow stack */
68#endif
69
70/*
71 * The time for a process to be blocked before being very swappable.
72 * This is a number of seconds which the system takes as being a non-trivial
73 * amount of real time. You probably shouldn't change this;
74 * it is used in subtle ways (fractions and multiples of it are, that is, like
75 * half of a ``long time'', almost a long time, etc.)
76 * It is related to human patience and other factors which don't really
77 * change over time.
78 */
79#define MAXSLP 20
80
81
82/*
83 * The physical address space is densely populated.
84 */
85#define VM_PHYSSEG_DENSE
86
87/*
88 * The number of PHYSSEG entries must be one greater than the number
89 * of phys_avail entries because the phys_avail entry that spans the
90 * largest physical address that is accessible by ISA DMA is split
91 * into two PHYSSEG entries.
92 */
93#define VM_PHYSSEG_MAX 17
94
95/*
96 * Create two free page pools. Since the i386 kernel virtual address
97 * space does not include a mapping onto the machine's entire physical
98 * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
99 * pool, VM_FREEPOOL_DEFAULT.
100 */
101#define VM_NFREEPOOL 2
102#define VM_FREEPOOL_CACHE 1
103#define VM_FREEPOOL_DEFAULT 0
104#define VM_FREEPOOL_DIRECT 0
105
106/*
107 * Create two free page lists: VM_FREELIST_DEFAULT is for physical
108 * pages that are above the largest physical address that is
109 * accessible by ISA DMA and VM_FREELIST_ISADMA is for physical pages
110 * that are below that address.
111 */
112#define VM_NFREELIST 2
113#define VM_FREELIST_DEFAULT 0
114#define VM_FREELIST_ISADMA 1
115
116/*
117 * The largest allocation size is 2MB under PAE and 4MB otherwise.
118 */
119#ifdef PAE
120#define VM_NFREEORDER 10
121#else
122#define VM_NFREEORDER 11
123#endif
124
125/*
|
| 126 * Disable superpage reservations.
127 */
128#ifndef VM_NRESERVLEVEL
129#define VM_NRESERVLEVEL 0
130#endif
131
132/*
133 * Level 0 reservations consist of 512 pages under PAE and 1024 pages
134 * otherwise.
135 */
136#ifndef VM_LEVEL_0_ORDER
137#ifdef PAE
138#define VM_LEVEL_0_ORDER 9
139#else
140#define VM_LEVEL_0_ORDER 10
141#endif
142#endif
143
144/*
|
126 * Kernel physical load address.
127 */
128#ifndef KERNLOAD
129#define KERNLOAD (1 << PDRSHIFT)
130#endif
131
132/*
133 * Virtual addresses of things. Derived from the page directory and
134 * page table indexes from pmap.h for precision.
135 * Because of the page that is both a PD and PT, it looks a little
136 * messy at times, but hey, we'll do anything to save a page :-)
137 */
138
139#define VM_MAX_KERNEL_ADDRESS VADDR(KPTDI+NKPDE-1, NPTEPG-1)
140#define VM_MIN_KERNEL_ADDRESS VADDR(PTDPTDI, PTDPTDI)
141
142#define KERNBASE VADDR(KPTDI, 0)
143
144#define UPT_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
145#define UPT_MIN_ADDRESS VADDR(PTDPTDI, 0)
146
147#define VM_MAXUSER_ADDRESS VADDR(PTDPTDI, 0)
148
149#define USRSTACK VM_MAXUSER_ADDRESS
150
151#define VM_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
152#define VM_MIN_ADDRESS ((vm_offset_t)0)
153
154/* virtual sizes (bytes) for various kernel submaps */
155#ifndef VM_KMEM_SIZE
156#define VM_KMEM_SIZE (12 * 1024 * 1024)
157#endif
158
159/*
160 * How many physical pages per KVA page allocated.
161 * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE),
162 * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX)
163 * is the total KVA space allocated for kmem_map.
164 */
165#ifndef VM_KMEM_SIZE_SCALE
166#define VM_KMEM_SIZE_SCALE (3)
167#endif
168
169/*
170 * Ceiling on amount of kmem_map kva space.
171 */
172#ifndef VM_KMEM_SIZE_MAX
173#define VM_KMEM_SIZE_MAX (320 * 1024 * 1024)
174#endif
175
176/* initial pagein size of beginning of executable file */
177#ifndef VM_INITIAL_PAGEIN
178#define VM_INITIAL_PAGEIN 16
179#endif
180
181#endif /* _MACHINE_VMPARAM_H_ */
| 145 * Kernel physical load address.
146 */
147#ifndef KERNLOAD
148#define KERNLOAD (1 << PDRSHIFT)
149#endif
150
151/*
152 * Virtual addresses of things. Derived from the page directory and
153 * page table indexes from pmap.h for precision.
154 * Because of the page that is both a PD and PT, it looks a little
155 * messy at times, but hey, we'll do anything to save a page :-)
156 */
157
158#define VM_MAX_KERNEL_ADDRESS VADDR(KPTDI+NKPDE-1, NPTEPG-1)
159#define VM_MIN_KERNEL_ADDRESS VADDR(PTDPTDI, PTDPTDI)
160
161#define KERNBASE VADDR(KPTDI, 0)
162
163#define UPT_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
164#define UPT_MIN_ADDRESS VADDR(PTDPTDI, 0)
165
166#define VM_MAXUSER_ADDRESS VADDR(PTDPTDI, 0)
167
168#define USRSTACK VM_MAXUSER_ADDRESS
169
170#define VM_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
171#define VM_MIN_ADDRESS ((vm_offset_t)0)
172
173/* virtual sizes (bytes) for various kernel submaps */
174#ifndef VM_KMEM_SIZE
175#define VM_KMEM_SIZE (12 * 1024 * 1024)
176#endif
177
178/*
179 * How many physical pages per KVA page allocated.
180 * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE),
181 * VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX)
182 * is the total KVA space allocated for kmem_map.
183 */
184#ifndef VM_KMEM_SIZE_SCALE
185#define VM_KMEM_SIZE_SCALE (3)
186#endif
187
188/*
189 * Ceiling on amount of kmem_map kva space.
190 */
191#ifndef VM_KMEM_SIZE_MAX
192#define VM_KMEM_SIZE_MAX (320 * 1024 * 1024)
193#endif
194
195/* initial pagein size of beginning of executable file */
196#ifndef VM_INITIAL_PAGEIN
197#define VM_INITIAL_PAGEIN 16
198#endif
199
200#endif /* _MACHINE_VMPARAM_H_ */
|