2 * Copyright (c) 1990 The Regents of the University of California.
4 * Copyright (c) 1994 John S. Dyson
6 * Copyright (c) 2003 Peter Wemm
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
41 * $FreeBSD: src/sys/amd64/include/vmparam.h,v 1.44 2003/12/07 04:51:04 alc Exp $
42 * $DragonFly: src/sys/platform/pc64/include/vmparam.h,v 1.1 2007/08/21 19:45:45 corecode Exp $
46 #ifndef _MACHINE_VMPARAM_H_
47 #define _MACHINE_VMPARAM_H_
50 * Machine dependent constants for AMD64.
54 * Virtual memory related constants, all in bytes
56 #define MAXTSIZ (128UL*1024*1024) /* max text size */
58 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
61 #define MAXDSIZ (256UL*1024*1024*1024) /* max data size */
64 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
67 #define MAXSSIZ (128UL*1024*1024*1024) /* max stack size */
70 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
74 * The time for a process to be blocked before being very swappable.
75 * This is a number of seconds which the system takes as being a non-trivial
76 * amount of real time. You probably shouldn't change this;
77 * it is used in subtle ways (fractions and multiples of it are, that is, like
78 * half of a ``long time'', almost a long time, etc.)
79 * It is related to human patience and other factors which don't really
85 * We provide a machine specific single page allocator through the use
86 * of the direct mapped segment. This uses 2MB pages for reduced
89 #define UMA_MD_SMALL_ALLOC
92 * Virtual addresses of things. Derived from the page directory and
93 * page table indexes from pmap.h for precision.
94 * Because of the page that is both a PD and PT, it looks a little
95 * messy at times, but hey, we'll do anything to save a page :-)
98 #define VM_MAX_KERNEL_ADDRESS KVADDR(KPML4I, NPDPEPG-1, NKPDE-1, NPTEPG-1)
99 #define VM_MIN_KERNEL_ADDRESS KVADDR(KPML4I, KPDPI, 0, 0)
101 #define DMAP_MIN_ADDRESS KVADDR(DMPML4I, 0, 0, 0)
102 #define DMAP_MAX_ADDRESS KVADDR(DMPML4I+1, 0, 0, 0)
104 #define KERNBASE KVADDR(KPML4I, KPDPI, 0, 0)
106 #define UPT_MAX_ADDRESS KVADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)
107 #define UPT_MIN_ADDRESS KVADDR(PML4PML4I, 0, 0, 0)
109 #define VM_MAXUSER_ADDRESS UVADDR(NUPML4E, 0, 0, 0)
111 #define USRSTACK VM_MAXUSER_ADDRESS
113 #define VM_MAX_ADDRESS UPT_MAX_ADDRESS
114 #define VM_MIN_ADDRESS (0)
116 #define VM_MIN_USER_ADDRESS ((vm_offset_t)0)
117 #define VM_MAX_USER_ADDRESS UVADDR(PTDPTDI, 0, 0, 0)
119 #define PHYS_TO_DMAP(x) ((x) | DMAP_MIN_ADDRESS)
120 #define DMAP_TO_PHYS(x) ((x) & ~DMAP_MIN_ADDRESS)
123 /* initial pagein size of beginning of executable file */
124 #ifndef VM_INITIAL_PAGEIN
125 #define VM_INITIAL_PAGEIN 16
128 #endif /* _MACHINE_VMPARAM_H_ */