1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * 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 * $FreeBSD$
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 16
70 #else
71 #define MAXCPU 1
72 #endif /* SMP */
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 #else
86 #define NPGPTD 1
87 #define PDRSHIFT 22 /* LOG2(NBPDR) */
88 #endif
89
90 #define NBPTD (NPGPTD<<PAGE_SHIFT)
91 #define NPDEPTD (NBPTD/(sizeof (pd_entry_t)))
92 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
93 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
94 #define PDRMASK (NBPDR-1)
95
96 #define IOPAGES 2 /* pages of i/o permission bitmap */
97
98 #ifndef KSTACK_PAGES
99 #define KSTACK_PAGES 2 /* Includes pcb! */
100 #endif
101 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
102
103 /*
104 * Ceiling on amount of swblock kva space, can be changed via
105 * the kern.maxswzone /boot/loader.conf variable.
106 */
107 #ifndef VM_SWZONE_SIZE_MAX
108 #define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
109 #endif
110
111 /*
112 * Ceiling on size of buffer cache (really only effects write queueing,
113 * the VM page cache is not effected), can be changed via
114 * the kern.maxbcache /boot/loader.conf variable.
115 */
116 #ifndef VM_BCACHE_SIZE_MAX
117 #define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
118 #endif
119
120 /*
121 * Mach derived conversion macros
122 */
123 #define trunc_page(x) ((x) & ~PAGE_MASK)
124 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
125 #define trunc_4mpage(x) ((x) & ~PDRMASK)
126 #define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK)
127
128 #define atop(x) ((x) >> PAGE_SHIFT)
129 #define ptoa(x) ((x) << PAGE_SHIFT)
130
131 #define i386_btop(x) ((x) >> PAGE_SHIFT)
132 #define i386_ptob(x) ((x) << PAGE_SHIFT)
133
134 #define pgtok(x) ((x) * (PAGE_SIZE / 1024))
135
136 #endif /* !_MACHINE_PARAM_H_ */
137 #endif /* !_NO_NAMESPACE_POLLUTION */
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