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/vmparam.h

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    1 /*      $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $        */
    2 /*      $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $  */
    3 
    4 /*
    5  * Copyright (c) 1988 University of Utah.
    6  * Copyright (c) 1992, 1993
    7  *      The Regents of the University of California.  All rights reserved.
    8  *
    9  * This code is derived from software contributed to Berkeley by
   10  * the Systems Programming Group of the University of Utah Computer
   11  * Science Department and Ralph Campbell.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  * 4. Neither the name of the University nor the names of its contributors
   22  *    may be used to endorse or promote products derived from this software
   23  *    without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  *      from: Utah Hdr: vmparam.h 1.16 91/01/18
   38  *      @(#)vmparam.h   8.2 (Berkeley) 4/22/94
   39  *      JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish
   40  * $FreeBSD: releng/9.0/sys/mips/include/vmparam.h 221855 2011-05-13 19:35:01Z mdf $
   41  */
   42 
   43 #ifndef _MACHINE_VMPARAM_H_
   44 #define _MACHINE_VMPARAM_H_
   45 
   46 /*
   47  * Machine dependent constants mips processors.
   48  */
   49 
   50 /*
   51  * Virtual memory related constants, all in bytes
   52  */
   53 #ifndef MAXTSIZ
   54 #define MAXTSIZ         (128UL*1024*1024)       /* max text size */
   55 #endif
   56 #ifndef DFLDSIZ
   57 #define DFLDSIZ         (128UL*1024*1024)       /* initial data size limit */
   58 #endif
   59 #ifndef MAXDSIZ
   60 #define MAXDSIZ         (1*1024UL*1024*1024)    /* max data size */
   61 #endif
   62 #ifndef DFLSSIZ
   63 #define DFLSSIZ         (8UL*1024*1024)         /* initial stack size limit */
   64 #endif
   65 #ifndef MAXSSIZ
   66 #define MAXSSIZ         (64UL*1024*1024)        /* max stack size */
   67 #endif
   68 #ifndef SGROWSIZ
   69 #define SGROWSIZ        (128UL*1024)            /* amount to grow stack */
   70 #endif
   71 
   72 /*
   73  * Mach derived constants
   74  */
   75 
   76 /* user/kernel map constants */
   77 #define VM_MIN_ADDRESS          ((vm_offset_t)0x00000000)
   78 #define VM_MAX_ADDRESS          ((vm_offset_t)(intptr_t)(int32_t)0xffffffff)
   79 
   80 #define VM_MINUSER_ADDRESS      ((vm_offset_t)0x00000000)
   81 
   82 #ifdef __mips_n64
   83 #define VM_MAXUSER_ADDRESS      (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG))
   84 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t)0xc000000000000000)
   85 #define VM_MAX_KERNEL_ADDRESS   (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG))
   86 #else
   87 #define VM_MAXUSER_ADDRESS      ((vm_offset_t)0x80000000)
   88 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t)0xC0000000)
   89 #define VM_MAX_KERNEL_ADDRESS   ((vm_offset_t)0xFFFFC000)
   90 #endif
   91 
   92 #define KERNBASE                ((vm_offset_t)(intptr_t)(int32_t)0x80000000)
   93 /*
   94  * USRSTACK needs to start a little below 0x8000000 because the R8000
   95  * and some QED CPUs perform some virtual address checks before the
   96  * offset is calculated.
   97  */
   98 #define USRSTACK                (VM_MAXUSER_ADDRESS - PAGE_SIZE)
   99  
  100 /*
  101  * Only one memory domain.
  102  */
  103 #ifndef VM_NDOMAIN
  104 #define VM_NDOMAIN              1
  105 #endif
  106 
  107 /*
  108  * Disable superpage reservations. (not sure if this is right
  109  * I copied it from ARM)
  110  */
  111 #ifndef VM_NRESERVLEVEL
  112 #define VM_NRESERVLEVEL         0
  113 #endif
  114 
  115 /* virtual sizes (bytes) for various kernel submaps */
  116 #ifndef VM_KMEM_SIZE
  117 #define VM_KMEM_SIZE            (12 * 1024 * 1024)
  118 #endif
  119 
  120 /*
  121  * How many physical pages per KVA page allocated.
  122  * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
  123  * is the total KVA space allocated for kmem_map.
  124  */
  125 #ifndef VM_KMEM_SIZE_SCALE
  126 #define VM_KMEM_SIZE_SCALE      (3)
  127 #endif
  128 
  129 /*
  130  * Ceiling on amount of kmem_map kva space.
  131  */
  132 #ifndef VM_KMEM_SIZE_MAX
  133 #define VM_KMEM_SIZE_MAX        (200 * 1024 * 1024)
  134 #endif
  135 
  136 /* initial pagein size of beginning of executable file */
  137 #ifndef VM_INITIAL_PAGEIN
  138 #define VM_INITIAL_PAGEIN       16
  139 #endif
  140 
  141 #define UMA_MD_SMALL_ALLOC
  142 
  143 /*
  144  * max number of non-contig chunks of physical RAM you can have
  145  */
  146 #define VM_PHYSSEG_MAX          32
  147 
  148 /*
  149  * The physical address space is sparsely populated.
  150  */
  151 #define VM_PHYSSEG_SPARSE
  152 
  153 /*
  154  * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
  155  * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
  156  * the pool from which physical pages for small UMA objects are
  157  * allocated.
  158  */
  159 #define VM_NFREEPOOL            3
  160 #define VM_FREEPOOL_CACHE       2
  161 #define VM_FREEPOOL_DEFAULT     0
  162 #define VM_FREEPOOL_DIRECT      1
  163 
  164 /*
  165  * we support 2 free lists:
  166  *
  167  *      - DEFAULT for direct mapped (KSEG0) pages.
  168  *        Note: This usage of DEFAULT may be misleading because we use
  169  *        DEFAULT for allocating direct mapped pages. The normal page
  170  *        allocations use HIGHMEM if available, and then DEFAULT. 
  171  *      - HIGHMEM for other pages 
  172  */
  173 #ifdef __mips_n64
  174 #define VM_NFREELIST            1
  175 #define VM_FREELIST_DEFAULT     0
  176 #define VM_FREELIST_DIRECT      VM_FREELIST_DEFAULT
  177 #else
  178 #define VM_NFREELIST            2
  179 #define VM_FREELIST_DEFAULT     1
  180 #define VM_FREELIST_HIGHMEM     0
  181 #define VM_FREELIST_DIRECT      VM_FREELIST_DEFAULT
  182 #define VM_HIGHMEM_ADDRESS      ((vm_paddr_t)0x20000000)
  183 #endif
  184 
  185 /*
  186  * The largest allocation size is 1MB.
  187  */
  188 #define VM_NFREEORDER           9
  189 
  190 #define ZERO_REGION_SIZE        (64 * 1024)     /* 64KB */
  191 
  192 #endif /* !_MACHINE_VMPARAM_H_ */

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