xref: /freebsd/sys/powerpc/include/vmparam.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3  * Copyright (C) 1995, 1996 TooLs GmbH.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by TooLs GmbH.
17  * 4. The name of TooLs GmbH may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  *
31  *	$NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
32  * $FreeBSD$
33  */
34 
35 #ifndef _MACHINE_VMPARAM_H_
36 #define	_MACHINE_VMPARAM_H_
37 
38 #define	USRSTACK	VM_MAXUSER_ADDRESS
39 
40 #ifndef	MAXTSIZ
41 #define	MAXTSIZ		(16*1024*1024)		/* max text size */
42 #endif
43 
44 #ifndef	DFLDSIZ
45 #define	DFLDSIZ		(32*1024*1024)		/* default data size */
46 #endif
47 
48 #ifndef	MAXDSIZ
49 #define	MAXDSIZ		(512*1024*1024)		/* max data size */
50 #endif
51 
52 #ifndef	DFLSSIZ
53 #define	DFLSSIZ		(1*1024*1024)		/* default stack size */
54 #endif
55 
56 #ifndef	MAXSSIZ
57 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
58 #endif
59 
60 /*
61  * Size of shared memory map
62  */
63 #ifndef	SHMMAXPGS
64 #define	SHMMAXPGS	1024
65 #endif
66 
67 /*
68  * The time for a process to be blocked before being very swappable.
69  * This is a number of seconds which the system takes as being a non-trivial
70  * amount of real time.  You probably shouldn't change this;
71  * it is used in subtle ways (fractions and multiples of it are, that is, like
72  * half of a ``long time'', almost a long time, etc.)
73  * It is related to human patience and other factors which don't really
74  * change over time.
75  */
76 #define	MAXSLP 		20
77 
78 /*
79  * Use the direct-mapped BAT registers for UMA small allocs. This
80  * takes pressure off the small amount of available KVA.
81  */
82 #define UMA_MD_SMALL_ALLOC
83 
84 /*
85  * Would like to have MAX addresses = 0, but this doesn't (currently) work
86  */
87 #define	VM_MIN_ADDRESS		((vm_offset_t)0)
88 #define	VM_MAXUSER_ADDRESS	((vm_offset_t)0x7ffff000)
89 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
90 #define	VM_MIN_KERNEL_ADDRESS	((vm_offset_t)(KERNEL_SR << ADDR_SR_SHFT))
91 #define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH - 1)
92 
93 #define	KERNBASE	0x100000	/* start of kernel virtual */
94 
95 /* XXX max. amount of KVM to be used by buffers. */
96 #ifndef VM_MAX_KERNEL_BUF
97 #define	VM_MAX_KERNEL_BUF	(SEGMENT_LENGTH * 7 / 10)
98 #endif
99 
100 struct pmap_physseg {
101 	struct pv_entry *pvent;
102 	char *attrs;
103 };
104 
105 #define	VM_PHYSSEG_MAX		16	/* 1? */
106 
107 /*
108  * The physical address space is densely populated.
109  */
110 #define	VM_PHYSSEG_DENSE
111 
112 /*
113  * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
114  * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
115  * the pool from which physical pages for small UMA objects are
116  * allocated.
117  */
118 #define	VM_NFREEPOOL		3
119 #define	VM_FREEPOOL_CACHE	2
120 #define	VM_FREEPOOL_DEFAULT	0
121 #define	VM_FREEPOOL_DIRECT	1
122 
123 /*
124  * Create one free page list.
125  */
126 #define	VM_NFREELIST		1
127 #define	VM_FREELIST_DEFAULT	0
128 
129 /*
130  * The largest allocation size is 4MB.
131  */
132 #define	VM_NFREEORDER		11
133 
134 /*
135  * Disable superpage reservations.
136  */
137 #ifndef	VM_NRESERVLEVEL
138 #define	VM_NRESERVLEVEL		0
139 #endif
140 
141 #ifndef VM_INITIAL_PAGEIN
142 #define	VM_INITIAL_PAGEIN	16
143 #endif
144 
145 #ifndef SGROWSIZ
146 #define	SGROWSIZ	(128UL*1024)		/* amount to grow stack */
147 #endif
148 
149 #ifndef VM_KMEM_SIZE
150 #define	VM_KMEM_SIZE		(12 * 1024 * 1024)
151 #endif
152 
153 #endif /* _MACHINE_VMPARAM_H_ */
154