vmparam.h revision 1.9 1 /* $NetBSD: vmparam.h,v 1.9 2007/04/07 09:02:50 skrll Exp $ */
2
3 /* $OpenBSD: vmparam.h,v 1.17 2001/09/22 18:00:09 miod Exp $ */
4
5 /*
6 * Copyright (c) 1988-1994, The University of Utah and
7 * the Computer Systems Laboratory at the University of Utah (CSL).
8 * All rights reserved.
9 *
10 * Permission to use, copy, modify and distribute this software is hereby
11 * granted provided that (1) source code retains these copyright, permission,
12 * and disclaimer notices, and (2) redistributions including binaries
13 * reproduce the notices in supporting documentation, and (3) all advertising
14 * materials mentioning features or use of this software display the following
15 * acknowledgement: ``This product includes software developed by the
16 * Computer Systems Laboratory at the University of Utah.''
17 *
18 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
19 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
20 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
21 *
22 * CSL requests users of this software to return to csl-dist (at) cs.utah.edu any
23 * improvements that they make and grant CSL redistribution rights.
24 *
25 * Utah $Hdr: vmparam.h 1.16 94/12/16$
26 */
27
28 #ifndef _HPPA_VMPARAM_H_
29 #define _HPPA_VMPARAM_H_
30
31 /*
32 * Machine dependent constants for HP PA
33 */
34
35 /*
36 * We use 4K pages on the HP PA. Override the PAGE_* definitions
37 * to be compile-time constants.
38 */
39 #define PAGE_SHIFT 12
40 #define PAGE_SIZE (1 << PAGE_SHIFT)
41 #define PAGE_MASK (PAGE_SIZE - 1)
42
43 /*
44 * USRSTACK is the bottom (start) of the user stack.
45 */
46 #define USRSTACK 0x70000000 /* Start of user stack */
47 #define SYSCALLGATE 0xC0000000 /* syscall gateway page */
48
49 /* Alignment requirement for a uspace. */
50 #define USPACE_ALIGN PAGE_SIZE
51
52 /*
53 * Virtual memory related constants, all in bytes
54 */
55 #ifndef MAXTSIZ
56 #define MAXTSIZ (0x40000000) /* max text size */
57 #endif
58 #ifndef DFLDSIZ
59 #define DFLDSIZ (16*1024*1024) /* initial data size limit */
60 #endif
61 #ifndef MAXDSIZ
62 #define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */
63 #endif
64 #ifndef DFLSSIZ
65 #define DFLSSIZ (512*1024) /* initial stack size limit */
66 #endif
67 #ifndef MAXSSIZ
68 #define MAXSSIZ (256*1024*1024) /* max stack size */
69 #endif
70
71 #ifndef USRIOSIZE
72 #define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */
73 #endif
74
75 /*
76 * PTEs for system V style shared memory.
77 * This is basically slop for kmempt which we actually allocate (malloc) from.
78 */
79 #ifndef SHMMAXPGS
80 #define SHMMAXPGS ((1024*1024*10)/PAGE_SIZE) /* 10mb */
81 #endif
82
83 /*
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
90 * change over time.
91 */
92 #define MAXSLP 20
93
94 /* user/kernel map constants */
95 #define VM_MIN_ADDRESS ((vaddr_t)0)
96 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000)
97 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
98 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
99 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xf0000000)
100
101 /* virtual sizes (bytes) for various kernel submaps */
102 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
103
104 #define VM_PHYSSEG_MAX 8 /* this many physmem segments */
105 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
106
107 #define VM_PHYSSEG_NOADD /* XXX until uvm code is fixed */
108
109 #define VM_NFREELIST 1
110 #define VM_FREELIST_DEFAULT 0
111
112 #endif /* _HPPA_VMPARAM_H_ */
113