sys/arch/alpha/include/param.h

   1 /* $NetBSD$ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  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 and Ralph Campbell.
  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 $Hdr: machparam.h 1.11 89/08/14$
  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 and Ralph Campbell.
  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 $Hdr: machparam.h 1.11 89/08/14$
  75  *
  76  *      @(#)param.h     8.1 (Berkeley) 6/10/93
  77  */
  78
  79 /*
  80  * Machine dependent constants for the Alpha.
  81  */
  82 #define _MACHINE        alpha
  83 #define MACHINE         "alpha"
  84 #define _MACHINE_ARCH   alpha
  85 #define MACHINE_ARCH    "alpha"
  86 #define MID_MACHINE     MID_ALPHA
  87
  88 #include <machine/cpu.h>
  89
  90 /*
  91  * Round p (pointer or byte index) up to a correctly-aligned value for all
  92  * data types (int, long, ...).   The result is u_long and must be cast to
  93  * any desired pointer type.
  94  *
  95  * ALIGNED_POINTER is a boolean macro that checks whether an address
  96  * is valid to fetch data elements of type t from on this architecture.
  97  * This does not reflect the optimal alignment, just the possibility
  98  * (within reasonable limits).
  99  *
 100  */
 101 #define ALIGNBYTES              7
 102 #define ALIGN(p)                (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
 103 #define ALIGNED_POINTER(p,t)    ((((u_long)(p)) & (sizeof(t)-1)) == 0)
 104
 105 #define NBPG            (1 << ALPHA_PGSHIFT)            /* bytes/page */
 106 #define PGOFSET         (NBPG-1)                        /* byte off. into pg */
 107 #define PGSHIFT         ALPHA_PGSHIFT                   /* LOG2(NBPG) */
 108
 109 #define KERNBASE        0xfffffc0000230000      /* start of kernel virtual */
 110 #define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)
 111
 112 #define DEV_BSIZE       512
 113 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
 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 UPAGES          2                       /* pages of u-area */
 123 #define USPACE          (UPAGES * NBPG)         /* total size of u-area */
 124
 125 #ifndef MSGBUFSIZE
 126 #define MSGBUFSIZE      NBPG            /* default message buffer size */
 127 #endif
 128
 129 /*
 130  * Constants related to network buffer management.
 131  * MCLBYTES must be no larger than NBPG (the software page size), and,
 132  * on machines that exchange pages of input or output buffers with mbuf
 133  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 134  * of the hardware page size.
 135  */
 136 #define MSIZE           256             /* size of an mbuf */
 137
 138 #ifndef MCLSHIFT
 139 #define MCLSHIFT        11              /* convert bytes to m_buf clusters */
 140                                         /* 2K cluster can hold Ether frame */
 141 #endif  /* MCLSHIFT */
 142
 143 #define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 144
 145 #ifndef NMBCLUSTERS
 146 #if defined(_KERNEL_OPT)
 147 #include "opt_gateway.h"
 148 #endif
 149
 150 #ifdef GATEWAY
 151 #define NMBCLUSTERS     4096            /* map size, max cluster allocation */
 152 #else
 153 #define NMBCLUSTERS     2048            /* map size, max cluster allocation */
 154 #endif
 155 #endif
 156
 157 /*
 158  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 159  * logical pages.
 160  */
 161 #define NKMEMPAGES_MIN_DEFAULT  ((8 * 1024 * 1024) >> PAGE_SHIFT)
 162 #define NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
 163
 164 /*
 165  * Mach derived conversion macros
 166  */
 167 #define alpha_round_page(x)     ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1))
 168 #define alpha_trunc_page(x)     ((unsigned long)(x) & ~(NBPG-1))
 169 #define alpha_btop(x)           ((unsigned long)(x) >> PGSHIFT)
 170 #define alpha_ptob(x)           ((unsigned long)(x) << PGSHIFT)
 171
 172 #ifdef _KERNEL
 173 #ifndef _LOCORE
 174
 175 #include <machine/intr.h>
 176
 177 void    delay(unsigned long);
 178 #define DELAY(n)        delay(n)
 179
 180 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */
 181 paddr_t alpha_XXX_dmamap(vaddr_t);
 182 /* XXX END BUS.H */
 183
 184 #endif
 185 #endif /* !_KERNEL */