| 1 | /*- modified for gcc by bird 2003 (don't really need much of this btw.)
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| 2 | *
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| 3 | * Copyright (c) 1990 The Regents of the University of California.
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * This code is derived from software contributed to Berkeley by
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| 7 | * William Jolitz.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | * 3. All advertising materials mentioning features or use of this software
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| 18 | * must display the following acknowledgement:
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| 19 | * This product includes software developed by the University of
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| 20 | * California, Berkeley and its contributors.
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| 21 | * 4. Neither the name of the University nor the names of its contributors
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| 22 | * may be used to endorse or promote products derived from this software
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| 23 | * without specific prior written permission.
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| 24 | *
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| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 35 | * SUCH DAMAGE.
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| 36 | *
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| 37 | * from: @(#)param.h 5.8 (Berkeley) 6/28/91
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| 38 | * $FreeBSD: src/sys/i386/include/param.h,v 1.54.2.8 2002/08/31 21:15:55 dillon Exp $
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| 39 | */
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| 40 |
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| 41 | /*
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| 42 | * Machine dependent constants for Intel 386.
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| 43 | */
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| 44 |
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| 45 | /*
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| 46 | * Round p (pointer or byte index) up to a correctly-aligned value
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| 47 | * for all data types (int, long, ...). The result is unsigned int
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| 48 | * and must be cast to any desired pointer type.
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| 49 | */
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| 50 | #ifndef _ALIGNBYTES
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| 51 | #define _ALIGNBYTES (sizeof(int) - 1)
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| 52 | #endif
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| 53 | #ifndef _ALIGN
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| 54 | #define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
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| 55 | #endif
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| 56 |
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| 57 | #ifndef _MACHINE
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| 58 | #define _MACHINE i386
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| 59 | #endif
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| 60 | #ifndef _MACHINE_ARCH
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| 61 | #define _MACHINE_ARCH i386
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| 62 | #endif
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| 63 |
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| 64 | #ifndef _NO_NAMESPACE_POLLUTION
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| 65 |
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| 66 | #ifndef _MACHINE_PARAM_H_
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| 67 | #define _MACHINE_PARAM_H_
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| 68 |
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| 69 | #ifndef MACHINE
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| 70 | #define MACHINE "i386"
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| 71 | #endif
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| 72 | #ifndef MACHINE_ARCH
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| 73 | #define MACHINE_ARCH "i386"
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| 74 | #endif
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| 75 | #define MID_MACHINE MID_I386
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| 76 |
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| 77 | /*
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| 78 | * OBJFORMAT_NAMES is a comma-separated list of the object formats
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| 79 | * that are supported on the architecture.
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| 80 | */
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| 81 | #define OBJFORMAT_NAMES "aout", "omf"
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| 82 | #define OBJFORMAT_DEFAULT "aout"
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| 83 |
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| 84 | #ifdef SMP
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| 85 | #define MAXCPU 16
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| 86 | #else
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| 87 | #define MAXCPU 1
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| 88 | #endif /* SMP */
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| 89 |
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| 90 | #define ALIGNBYTES _ALIGNBYTES
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| 91 | #define ALIGN(p) _ALIGN(p)
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| 92 |
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| 93 | #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
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| 94 | #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
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| 95 | #define PAGE_MASK (PAGE_SIZE-1)
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| 96 | #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
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| 97 |
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| 98 | #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
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| 99 | #define PDRSHIFT 22 /* LOG2(NBPDR) */
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| 100 | #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
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| 101 | #define PDRMASK (NBPDR-1)
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| 102 |
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| 103 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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| 104 | #define DEV_BSIZE (1<<DEV_BSHIFT)
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| 105 |
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| 106 | #ifndef BLKDEV_IOSIZE
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| 107 | #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
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| 108 | #endif
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| 109 | #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
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| 110 | #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
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| 111 | #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)
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| 112 |
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| 113 | #define IOPAGES 2 /* pages of i/o permission bitmap */
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| 114 | #define UPAGES 3 /* pages of u-area */
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| 115 |
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| 116 | /*
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| 117 | * Ceiling on amount of swblock kva space, can be changed via
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| 118 | * kern.maxswzone /boot/loader.conf variable.
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| 119 | */
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| 120 | #ifndef VM_SWZONE_SIZE_MAX
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| 121 | #define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
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| 122 | #endif
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| 123 |
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| 124 | /*
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| 125 | * Ceiling on size of buffer cache (really only effects write queueing,
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| 126 | * the VM page cache is not effected), can be changed via
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| 127 | * kern.maxbcache /boot/loader.conf variable.
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| 128 | */
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| 129 | #ifndef VM_BCACHE_SIZE_MAX
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| 130 | #define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
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| 131 | #endif
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| 132 |
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| 133 |
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| 134 | /*
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| 135 | * Constants related to network buffer management.
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| 136 | * MCLBYTES must be no larger than CLBYTES (the software page size), and,
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| 137 | * on machines that exchange pages of input or output buffers with mbuf
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| 138 | * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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| 139 | * of the hardware page size.
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| 140 | */
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| 141 | #ifndef MSIZE
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| 142 | #define MSIZE 256 /* size of an mbuf */
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| 143 | #endif /* MSIZE */
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| 144 |
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| 145 | #ifndef MCLSHIFT
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| 146 | #define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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| 147 | #endif /* MCLSHIFT */
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| 148 | #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
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| 149 | #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
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| 150 |
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| 151 | /*
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| 152 | * Some macros for units conversion
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| 153 | */
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| 154 |
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| 155 | /* clicks to bytes */
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| 156 | #define ctob(x) ((x)<<PAGE_SHIFT)
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| 157 |
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| 158 | /* bytes to clicks */
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| 159 | #define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)
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| 160 |
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| 161 | /*
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| 162 | * btodb() is messy and perhaps slow because `bytes' may be an off_t. We
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| 163 | * want to shift an unsigned type to avoid sign extension and we don't
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| 164 | * want to widen `bytes' unnecessarily. Assume that the result fits in
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| 165 | * a daddr_t.
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| 166 | */
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| 167 | #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
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| 168 | (sizeof (bytes) > sizeof(long) \
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| 169 | ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
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| 170 | : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
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| 171 |
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| 172 | #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
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| 173 | ((off_t)(db) << DEV_BSHIFT)
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| 174 |
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| 175 | /*
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| 176 | * Mach derived conversion macros
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| 177 | */
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| 178 | #define trunc_page(x) ((x) & ~PAGE_MASK)
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| 179 | #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
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| 180 | #define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK)
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| 181 | #define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
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| 182 |
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| 183 | #define atop(x) ((unsigned)(x) >> PAGE_SHIFT)
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| 184 | #define ptoa(x) ((unsigned)(x) << PAGE_SHIFT)
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| 185 |
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| 186 | #define i386_btop(x) ((unsigned)(x) >> PAGE_SHIFT)
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| 187 | #define i386_ptob(x) ((unsigned)(x) << PAGE_SHIFT)
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| 188 |
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| 189 | #define pgtok(x) ((x) * (PAGE_SIZE / 1024))
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| 190 |
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| 191 | #ifdef _KERNEL
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| 192 |
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| 193 | /*
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| 194 | * We put here the definition of two debugging macros/function which
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| 195 | * are very convenient to have available.
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| 196 | * The macro is called TSTMP() and is used to timestamp events in the
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| 197 | * kernel using the TSC register, and export them to userland through
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| 198 | * the sysctl variable debug.timestamp, which is a circular buffer
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| 199 | * holding pairs of u_int32_t variables <timestamp, argument> .
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| 200 | * They can be retrieved with something like
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| 201 | *
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| 202 | * sysctl -b debug.timestamp | hexdump -e '"%15u %15u\n"'
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| 203 | *
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| 204 | * The function _TSTMP() is defined in i386/isa/clock.c. It does not
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| 205 | * try to grab any locks or block interrupts or identify which CPU it
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| 206 | * is running on. You are supposed to know what to do if you use it.
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| 207 | *
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| 208 | * The macros must be enabled with "options KERN_TIMESTAMP" in the kernel
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| 209 | * config file, otherwise they default to an empty block.
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| 210 | */
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| 211 |
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| 212 | #ifdef KERN_TIMESTAMP
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| 213 | extern void _TSTMP(u_int32_t argument);
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| 214 | #define TSTMP(class, unit, event, par) _TSTMP( \
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| 215 | (((class) & 0x0f) << 28 ) | \
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| 216 | (((unit) & 0x0f) << 24 ) | \
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| 217 | (((event) & 0xff) << 16 ) | \
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| 218 | (((par) & 0xffff) ) )
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| 219 |
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| 220 | #else /* !KERN_TIMESTAMP */
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| 221 | #define _TSTMP(x) {}
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| 222 | #define TSTMP(class, unit, event, par) _TSTMP(0)
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| 223 | #endif /* !KERN_TIMESTAMP */
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| 224 | #endif /* _KERNEL */
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| 225 |
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| 226 | #endif /* !_MACHINE_PARAM_H_ */
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| 227 | #endif /* !_NO_NAMESPACE_POLLUTION */
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