The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/param.h

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    1 /*      $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 1988 University of Utah.
    5  * Copyright (c) 1992, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * This code is derived from software contributed to Berkeley by
    9  * the Systems Programming Group of the University of Utah Computer
   10  * Science Department and Ralph Campbell.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      from: Utah Hdr: machparam.h 1.11 89/08/14
   37  *      from: @(#)param.h       8.1 (Berkeley) 6/10/93
   38  *      JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish
   39  * $FreeBSD: releng/10.2/sys/mips/include/param.h 274648 2014-11-18 12:53:32Z kib $
   40  */
   41 
   42 #ifndef _MIPS_INCLUDE_PARAM_H_
   43 #define _MIPS_INCLUDE_PARAM_H_
   44 
   45 #include <machine/_align.h>
   46 
   47 #include <sys/cdefs.h>
   48 #ifdef _KERNEL
   49 #ifndef _LOCORE
   50 #include <machine/cpu.h>
   51 #endif
   52 #endif
   53 
   54 #define __PCI_REROUTE_INTERRUPT
   55 
   56 #ifndef MACHINE
   57 #define MACHINE         "mips"
   58 #endif
   59 #ifndef MACHINE_ARCH
   60 #if _BYTE_ORDER == _BIG_ENDIAN
   61 #ifdef __mips_n64
   62 #define MACHINE_ARCH    "mips64"
   63 #ifndef MACHINE_ARCH32
   64 #define MACHINE_ARCH32  "mips"
   65 #endif
   66 #elif defined(__mips_n32)
   67 #define MACHINE_ARCH    "mipsn32"
   68 #else
   69 #define MACHINE_ARCH    "mips"
   70 #endif
   71 #else
   72 #ifdef __mips_n64
   73 #define MACHINE_ARCH    "mips64el"
   74 #ifndef MACHINE_ARCH32
   75 #define MACHINE_ARCH32  "mipsel"
   76 #endif
   77 #elif defined(__mips_n32)
   78 #define MACHINE_ARCH    "mipsn32el"
   79 #else
   80 #define MACHINE_ARCH    "mipsel"
   81 #endif
   82 #endif
   83 #endif
   84 
   85 /*
   86  * OBJFORMAT_NAMES is a comma-separated list of the object formats
   87  * that are supported on the architecture.
   88  */
   89 #define OBJFORMAT_NAMES         "elf"
   90 #define OBJFORMAT_DEFAULT       "elf"
   91 
   92 #define MID_MACHINE     0       /* None but has to be defined */
   93 
   94 #ifdef SMP
   95 #define MAXSMPCPU       32
   96 #ifndef MAXCPU
   97 #define MAXCPU          MAXSMPCPU
   98 #endif
   99 #else
  100 #define MAXSMPCPU       1
  101 #define MAXCPU          1
  102 #endif
  103 
  104 #ifndef MAXMEMDOM
  105 #define MAXMEMDOM       1
  106 #endif
  107 
  108 /*
  109  * Round p (pointer or byte index) up to a correctly-aligned value for all
  110  * data types (int, long, ...).   The result is u_int and must be cast to
  111  * any desired pointer type.
  112  */
  113 
  114 #define ALIGNBYTES      _ALIGNBYTES
  115 #define ALIGN(p)        _ALIGN(p)
  116 /*
  117  * ALIGNED_POINTER is a boolean macro that checks whether an address
  118  * is valid to fetch data elements of type t from on this architecture.
  119  * This does not reflect the optimal alignment, just the possibility
  120  * (within reasonable limits). 
  121  */
  122 #define ALIGNED_POINTER(p, t)   ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0)
  123 
  124 /*
  125  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
  126  * architecture.  It should be used with appropriate caution.
  127  */
  128 #define CACHE_LINE_SHIFT        6
  129 #define CACHE_LINE_SIZE         (1 << CACHE_LINE_SHIFT)
  130 
  131 #define PAGE_SHIFT              12              /* LOG2(PAGE_SIZE) */
  132 #define PAGE_SIZE               (1<<PAGE_SHIFT) /* bytes/page */
  133 #define PAGE_MASK               (PAGE_SIZE-1)
  134 
  135 #define NPTEPG                  (PAGE_SIZE/(sizeof (pt_entry_t)))
  136 #define NPDEPG                  (PAGE_SIZE/(sizeof (pd_entry_t)))
  137 
  138 #if defined(__mips_n32) || defined(__mips_n64) /*  PHYSADDR_64_BIT */
  139 #define NPTEPGSHIFT             9               /* LOG2(NPTEPG) */
  140 #else
  141 #define NPTEPGSHIFT             10               /* LOG2(NPTEPG) */
  142 #endif
  143 
  144 #ifdef __mips_n64
  145 #define NPDEPGSHIFT             9               /* LOG2(NPTEPG) */
  146 #define SEGSHIFT                (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT)
  147 #define NBSEG                   (1ul << SEGSHIFT)
  148 #define PDRSHIFT                (PAGE_SHIFT + NPTEPGSHIFT)
  149 #define PDRMASK                 ((1 << PDRSHIFT) - 1)
  150 #else
  151 #define NPDEPGSHIFT             10               /* LOG2(NPTEPG) */
  152 #define SEGSHIFT                (PAGE_SHIFT + NPTEPGSHIFT)
  153 #define NBSEG                   (1 << SEGSHIFT) /* bytes/segment */
  154 #define PDRSHIFT                SEGSHIFT        /* alias for SEG in 32 bit */
  155 #define PDRMASK                 ((1 << PDRSHIFT) - 1)
  156 #endif
  157 #define NBPDR                   (1 << PDRSHIFT) /* bytes/pagedir */
  158 #define SEGMASK                 (NBSEG - 1)     /* byte offset into segment */
  159 
  160 #define MAXPAGESIZES            1               /* max supported pagesizes */
  161 
  162 #define MAXDUMPPGS              1               /* xxx: why is this only one? */
  163 
  164 /*
  165  * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary.
  166  */
  167 #define KSTACK_PAGES            2       /* kernel stack */
  168 #define KSTACK_GUARD_PAGES      2       /* pages of kstack guard; 0 disables */
  169 
  170 /*
  171  * Mach derived conversion macros
  172  */
  173 #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
  174 #define trunc_page(x)           ((x) & ~PAGE_MASK)
  175 
  176 #define atop(x)                 ((x) >> PAGE_SHIFT)
  177 #define ptoa(x)                 ((x) << PAGE_SHIFT)
  178 
  179 #define pgtok(x)                ((x) * (PAGE_SIZE / 1024))
  180 
  181 #ifdef _KERNEL
  182 #define NO_FUEWORD      1
  183 #endif
  184 
  185 #endif /* !_MIPS_INCLUDE_PARAM_H_ */

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