sys/arch/m68k/include/param.h

   1 /*      $NetBSD: param.h,v 1.15 2006/08/28 13:43:35 yamt Exp $  */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: Utah $Hdr: machparam.h 1.16 92/12/20$
  36  *
  37  *      @(#)param.h     8.1 (Berkeley) 6/10/93
  38  */
  39 /*
  40  * Copyright (c) 1988 University of Utah.
  41  *
  42  * This code is derived from software contributed to Berkeley by
  43  * the Systems Programming Group of the University of Utah Computer
  44  * Science Department.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Berkeley and its contributors.
  58  * 4. Neither the name of the University nor the names of its contributors
  59  *    may be used to endorse or promote products derived from this software
  60  *    without specific prior written permission.
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  *
  74  * from: Utah $Hdr: machparam.h 1.16 92/12/20$
  75  *
  76  *      @(#)param.h     8.1 (Berkeley) 6/10/93
  77  */
  78 #ifndef _M68K_PARAM_H_
  79 #define _M68K_PARAM_H_
  80
  81 /*
  82  * Machine independent constants for m68k
  83  */
  84 #ifndef MACHINE_ARCH
  85 #define _MACHINE_ARCH   m68k
  86 #define MACHINE_ARCH    "m68k"
  87 #endif
  88 #ifndef MID_MACHINE
  89 #define MID_MACHINE     MID_M68K
  90 #endif
  91
  92 /*
  93  * Round p (pointer or byte index) up to a correctly-aligned value for all
  94  * data types (int, long, ...).   The result is u_int and must be cast to
  95  * any desired pointer type.
  96  *
  97  * ALIGNED_POINTER is a boolean macro that checks whether an address
  98  * is valid to fetch data elements of type t from on this architecture.
  99  * This does not reflect the optimal alignment, just the possibility
 100  * (within reasonable limits).
 101  *
 102  */
 103 #define ALIGNBYTES              (sizeof(int) - 1)
 104 #define ALIGN(p)                (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
 105 #define ALIGNED_POINTER(p,t)    ((((u_long)(p)) & (sizeof(t)-1)) == 0)
 106
 107 #define NBPG            (1 << PGSHIFT)  /* bytes/page */
 108 #define PGOFSET         (NBPG-1)        /* byte offset into page */
 109
 110 #define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)
 111
 112 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
 113 #define DEV_BSIZE       (1 << DEV_BSHIFT)
 114 #define BLKDEV_IOSIZE   2048
 115 #ifndef MAXPHYS
 116 #define MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
 117 #endif
 118
 119 #define SSIZE           1               /* initial stack size/NBPG */
 120 #define SINCR           1               /* increment of stack/NBPG */
 121
 122 #define USPACE          (UPAGES * NBPG)
 123
 124 #ifndef MSGBUFSIZE
 125 #define MSGBUFSIZE      NBPG            /* default message buffer size */
 126 #endif
 127
 128 /*
 129  * Constants related to network buffer management.
 130  * MCLBYTES must be no larger than NBPG (the software page size), and,
 131  * on machines that exchange pages of input or output buffers with mbuf
 132  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 133  * of the hardware page size.
 134  */
 135 #define MSIZE           256             /* size of an mbuf */
 136
 137 #ifndef MCLSHIFT
 138 #define MCLSHIFT        11              /* convert bytes to m_buf clusters */
 139                                         /* 2K cluster can hold Ether frame */
 140 #endif  /* MCLSHIFT */
 141
 142 #define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 143
 144 #ifndef NMBCLUSTERS
 145 #if defined(_KERNEL_OPT)
 146 #include "opt_gateway.h"
 147 #endif
 148
 149 #ifdef GATEWAY
 150 # define        NMBCLUSTERS     512     /* map size, max cluster allocation */
 151 #else
 152 # define        NMBCLUSTERS     256     /* map size, max cluster allocation */
 153 #endif
 154 #endif
 155
 156 /*
 157  * Mach-derived conversion macros
 158  */
 159 #define m68k_round_page(x)      ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET)
 160 #define m68k_trunc_page(x)      ((vaddr_t)(x) & ~PGOFSET)
 161 #define m68k_page_offset(x)     ((vaddr_t)(x) & PGOFSET)
 162 #define m68k_btop(x)            ((vaddr_t)(x) >> PGSHIFT)
 163 #define m68k_ptob(x)            ((vaddr_t)(x) << PGSHIFT)
 164
 165 #endif  /* !_M68K_PARAM_H_ */