param.h revision 183525 
1170076Skmacy/*-
2170076Skmacy * Copyright (c) 1990 The Regents of the University of California.
3170076Skmacy * All rights reserved.
4170076Skmacy *
5174686Skmacy * This code is derived from software contributed to Berkeley by
6174686Skmacy * William Jolitz.
7174637Skmacy *
8267992Shselasky * Redistribution and use in source and binary forms, with or without
9174637Skmacy * modification, are permitted provided that the following conditions
10170076Skmacy * are met:
11170076Skmacy * 1. Redistributions of source code must retain the above copyright
12170076Skmacy *    notice, this list of conditions and the following disclaimer.
13170076Skmacy * 2. Redistributions in binary form must reproduce the above copyright
14170076Skmacy *    notice, this list of conditions and the following disclaimer in the
15170076Skmacy *    documentation and/or other materials provided with the distribution.
16172109Skmacy * 4. Neither the name of the University nor the names of its contributors
17172109Skmacy *    may be used to endorse or promote products derived from this software
18170076Skmacy *    without specific prior written permission.
19170076Skmacy *
20267992Shselasky * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21267992Shselasky * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
33 * $FreeBSD: head/sys/i386/include/param.h 183525 2008-10-01 21:59:04Z jhb $
34 */
35
36/*
37 * Machine dependent constants for Intel 386.
38 */
39
40/*
41 * Round p (pointer or byte index) up to a correctly-aligned value
42 * for all data types (int, long, ...).   The result is unsigned int
43 * and must be cast to any desired pointer type.
44 */
45#ifndef _ALIGNBYTES
46#define _ALIGNBYTES	(sizeof(int) - 1)
47#endif
48#ifndef _ALIGN
49#define _ALIGN(p)	(((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
50#endif
51
52#ifndef _NO_NAMESPACE_POLLUTION
53
54#define __HAVE_ACPI
55#define __PCI_REROUTE_INTERRUPT
56
57#ifndef _MACHINE_PARAM_H_
58#define	_MACHINE_PARAM_H_
59
60#ifndef MACHINE
61#define MACHINE		"i386"
62#endif
63#ifndef MACHINE_ARCH
64#define	MACHINE_ARCH	"i386"
65#endif
66#define MID_MACHINE	MID_I386
67
68#if defined(SMP) || defined(KLD_MODULE)
69#define MAXCPU		32
70#else
71#define MAXCPU		1
72#endif /* SMP || KLD_MODULE */
73
74#define ALIGNBYTES	_ALIGNBYTES
75#define ALIGN(p)	_ALIGN(p)
76
77#define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
78#define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
79#define PAGE_MASK	(PAGE_SIZE-1)
80#define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
81
82#ifdef PAE
83#define NPGPTD		4
84#define PDRSHIFT	21		/* LOG2(NBPDR) */
85#define NPGPTD_SHIFT	9
86#else
87#define NPGPTD		1
88#define PDRSHIFT	22		/* LOG2(NBPDR) */
89#define NPGPTD_SHIFT	10
90#endif
91
92#define NBPTD		(NPGPTD<<PAGE_SHIFT)
93#define NPDEPTD		(NBPTD/(sizeof (pd_entry_t)))
94#define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
95#define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */
96#define PDRMASK		(NBPDR-1)
97
98#define IOPAGES	2		/* pages of i/o permission bitmap */
99
100#ifndef KSTACK_PAGES
101#define KSTACK_PAGES 2		/* Includes pcb! */
102#endif
103#define KSTACK_GUARD_PAGES 1	/* pages of kstack guard; 0 disables */
104
105/*
106 * Ceiling on amount of swblock kva space, can be changed via
107 * the kern.maxswzone /boot/loader.conf variable.
108 */
109#ifndef VM_SWZONE_SIZE_MAX
110#define VM_SWZONE_SIZE_MAX	(32 * 1024 * 1024)
111#endif
112
113/*
114 * Ceiling on size of buffer cache (really only effects write queueing,
115 * the VM page cache is not effected), can be changed via
116 * the kern.maxbcache /boot/loader.conf variable.
117 */
118#ifndef VM_BCACHE_SIZE_MAX
119#define VM_BCACHE_SIZE_MAX	(200 * 1024 * 1024)
120#endif
121
122/*
123 * Mach derived conversion macros
124 */
125#define trunc_page(x)		((x) & ~PAGE_MASK)
126#define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
127#define trunc_4mpage(x)		((x) & ~PDRMASK)
128#define round_4mpage(x)		((((x)) + PDRMASK) & ~PDRMASK)
129
130#define atop(x)			((x) >> PAGE_SHIFT)
131#define ptoa(x)			((x) << PAGE_SHIFT)
132
133#define i386_btop(x)		((x) >> PAGE_SHIFT)
134#define i386_ptob(x)		((x) << PAGE_SHIFT)
135
136#define	pgtok(x)		((x) * (PAGE_SIZE / 1024))
137
138#endif /* !_MACHINE_PARAM_H_ */
139#endif /* !_NO_NAMESPACE_POLLUTION */
140