sys/arch/sparc/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 software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)param.h     8.1 (Berkeley) 6/11/93
  41  */
  42 /*
  43  * Sun4M support by Aaron Brown, Harvard University.
  44  * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
  45  * All rights reserved.
  46  */
  47 #define _MACHINE        sparc
  48 #define MACHINE         "sparc"
  49 #define _MACHINE_ARCH   sparc
  50 #define MACHINE_ARCH    "sparc"
  51 #define MID_MACHINE     MID_SPARC
  52
  53 #include <machine/cpuconf.h>            /* XXX */
  54 #ifdef _KERNEL                          /* XXX */
  55 #ifndef _LOCORE                         /* XXX */
  56 #include <machine/cpu.h>                /* XXX */
  57 #endif                                  /* XXX */
  58 #endif                                  /* XXX */
  59
  60 /*
  61  * Round p (pointer or byte index) up to a correctly-aligned value for
  62  * the machine's strictest data type.  The result is u_int and must be
  63  * cast to any desired pointer type.
  64  *
  65  * ALIGNED_POINTER is a boolean macro that checks whether an address
  66  * is valid to fetch data elements of type t from on this architecture.
  67  * This does not reflect the optimal alignment, just the possibility
  68  * (within reasonable limits).
  69  *
  70  */
  71 #define ALIGNBYTES              7
  72 #define ALIGN(p)                (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
  73 #define ALIGNED_POINTER(p,t)    ((((u_long)(p)) & (sizeof(t)-1)) == 0)
  74
  75 #define SUN4_PGSHIFT    13      /* for a sun4 machine */
  76 #define SUN4CM_PGSHIFT  12      /* for a sun4c or sun4m machine */
  77
  78 /*
  79  * The following variables are always defined and initialized (in locore)
  80  * so independently compiled modules (e.g. LKMs) can be used irrespective
  81  * of the `options SUN4?' combination a particular kernel was configured with.
  82  * See also the definitions of NBPG, PGOFSET and PGSHIFT below.
  83  */
  84 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
  85 extern int nbpg, pgofset, pgshift;
  86 #endif
  87
  88 #if !(defined(PROM_AT_F0) || defined(MSIIEP))
  89 #define KERNBASE        0xf0000000      /* start of kernel virtual space */
  90 #else
  91 /*
  92  * JS1/OF has prom sitting in f000.0000..f007.ffff, modify kernel VA
  93  * layout to work around that. XXX - kernel should live beyound prom on
  94  * those machines.
  95  */
  96 #define KERNBASE        0xe8000000
  97 #endif
  98 #define KERNEND         0xfe000000      /* end of kernel virtual space */
  99 /* Arbitrarily only use 1/4 of the kernel address space for buffers. */
 100 #define VM_MAX_KERNEL_BUF       ((KERNEND - KERNBASE)/4)
 101 #define PROM_LOADADDR   0x00004000      /* where the prom loads us */
 102 #define KERNTEXTOFF     (KERNBASE+PROM_LOADADDR)/* start of kernel text */
 103
 104 #define DEV_BSIZE       512
 105 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
 106 #define BLKDEV_IOSIZE   2048
 107 #define MAXPHYS         (64 * 1024)
 108
 109 #define SSIZE           1               /* initial stack size in pages */
 110 #define USPACE          8192
 111
 112 /*
 113  * Constants related to network buffer management.
 114  * MCLBYTES must be no larger than NBPG (the software page size), and,
 115  * on machines that exchange pages of input or output buffers with mbuf
 116  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 117  * of the hardware page size.
 118  */
 119 #define MSIZE           256             /* size of an mbuf */
 120
 121 #ifndef MCLSHIFT
 122 #define MCLSHIFT        11              /* convert bytes to m_buf clusters */
 123                                         /* 2K cluster can hold Ether frame */
 124 #endif  /* MCLSHIFT */
 125
 126 #define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 127
 128 #ifndef NMBCLUSTERS
 129 #if defined(_KERNEL_OPT)
 130 #include "opt_gateway.h"
 131 #endif
 132
 133 #ifdef GATEWAY
 134 #define NMBCLUSTERS     512             /* map size, max cluster allocation */
 135 #else
 136 #define NMBCLUSTERS     256             /* map size, max cluster allocation */
 137 #endif
 138 #endif
 139
 140 /*
 141  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 142  * logical pages.
 143  */
 144 #define NKMEMPAGES_MIN_DEFAULT  ((6 * 1024 * 1024) >> PAGE_SHIFT)
 145 #define NKMEMPAGES_MAX_DEFAULT  ((32 * 1024 * 1024) >> PAGE_SHIFT)
 146
 147 #if defined(_KERNEL) || defined(_STANDALONE)
 148 #ifndef _LOCORE
 149 extern void     delay(unsigned int);
 150 #define DELAY(n)        delay(n)
 151 #endif /* _LOCORE */
 152
 153 /*
 154  * microSPARC-IIep is a sun4m but with an integrated PCI controller.
 155  * In a lot of places (like pmap &c) we want it to be treated as SUN4M.
 156  * But since various low-level things are done very differently from
 157  * normal sparcs (and since for now it requires a relocated kernel
 158  * anyway), the MSIIEP kernels are not supposed to support any other
 159  * system.  So insist on SUN4M defined and SUN4 and SUN4C not defined.
 160  */
 161 #if defined(MSIIEP)
 162 #if defined(SUN4) || defined(SUN4C) || defined(SUN4D)
 163 #error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d"
 164 #endif
 165 #if !defined(SUN4M)
 166 #error "microSPARC-IIep kernel must have 'options SUN4M'"
 167 #endif
 168 #endif /* MSIIEP */
 169
 170 /*
 171  * Sun4 machines have a page size of 8192.  All other machines have a page
 172  * size of 4096.  Short cut page size variables if we can.
 173  */
 174 #if CPU_NTYPES != 0 && !defined(SUN4)
 175 #       define NBPG             4096
 176 #       define PGOFSET          (NBPG-1)
 177 #       define PGSHIFT          SUN4CM_PGSHIFT
 178 #elif CPU_NTYPES == 1 && defined(SUN4)
 179 #       define NBPG             8192
 180 #       define PGOFSET          (NBPG-1)
 181 #       define PGSHIFT          SUN4_PGSHIFT
 182 #else
 183 #       define NBPG             nbpg
 184 #       define PGOFSET          pgofset
 185 #       define PGSHIFT          pgshift
 186 #endif
 187
 188 #endif /* _KERNEL || _STANDALONE */