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  * SPDX-License-Identifier: BSD-3-Clause
    6  *
    7  * Copyright (c) 1988 University of Utah.
    8  * Copyright (c) 1992, 1993
    9  *      The Regents of the University of California.  All rights reserved.
   10  *
   11  * This code is derived from software contributed to Berkeley by
   12  * the Systems Programming Group of the University of Utah Computer
   13  * Science Department and Ralph Campbell.
   14  *
   15  * Redistribution and use in source and binary forms, with or without
   16  * modification, are permitted provided that the following conditions
   17  * are met:
   18  * 1. Redistributions of source code must retain the above copyright
   19  *    notice, this list of conditions and the following disclaimer.
   20  * 2. Redistributions in binary form must reproduce the above copyright
   21  *    notice, this list of conditions and the following disclaimer in the
   22  *    documentation and/or other materials provided with the distribution.
   23  * 3. Neither the name of the University nor the names of its contributors
   24  *    may be used to endorse or promote products derived from this software
   25  *    without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   37  * SUCH DAMAGE.
   38  *
   39  *      from: Utah Hdr: vmparam.h 1.16 91/01/18
   40  *      @(#)vmparam.h   8.2 (Berkeley) 4/22/94
   41  *      JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish
   42  * $FreeBSD$
   43  */
   44 
   45 #ifndef _MACHINE_VMPARAM_H_
   46 #define _MACHINE_VMPARAM_H_
   47 
   48 /*
   49  * Machine dependent constants mips processors.
   50  */
   51 
   52 /*
   53  * Virtual memory related constants, all in bytes
   54  */
   55 #ifndef MAXTSIZ
   56 #define MAXTSIZ         (128UL*1024*1024)       /* max text size */
   57 #endif
   58 #ifndef DFLDSIZ
   59 #define DFLDSIZ         (128UL*1024*1024)       /* initial data size limit */
   60 #endif
   61 #ifndef MAXDSIZ
   62 #define MAXDSIZ         (1*1024UL*1024*1024)    /* max data size */
   63 #endif
   64 #ifndef DFLSSIZ
   65 #define DFLSSIZ         (8UL*1024*1024)         /* initial stack size limit */
   66 #endif
   67 #ifndef MAXSSIZ
   68 #define MAXSSIZ         (64UL*1024*1024)        /* max stack size */
   69 #endif
   70 #ifndef SGROWSIZ
   71 #define SGROWSIZ        (128UL*1024)            /* amount to grow stack */
   72 #endif
   73 
   74 /*
   75  * Mach derived constants
   76  */
   77 
   78 /* user/kernel map constants */
   79 #define VM_MIN_ADDRESS          ((vm_offset_t)0x00000000)
   80 #define VM_MAX_ADDRESS          ((vm_offset_t)(intptr_t)(int32_t)0xffffffff)
   81 
   82 #define VM_MINUSER_ADDRESS      ((vm_offset_t)0x00000000)
   83 
   84 #ifdef __mips_n64
   85 #define VM_MAXUSER_ADDRESS      (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG))
   86 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t)0xc000000000000000)
   87 #define VM_MAX_KERNEL_ADDRESS   (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG))
   88 #else
   89 #define VM_MAXUSER_ADDRESS      ((vm_offset_t)0x80000000)
   90 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t)0xC0000000)
   91 #define VM_MAX_KERNEL_ADDRESS   ((vm_offset_t)0xFFFFC000)
   92 #endif
   93 
   94 #define KERNBASE                ((vm_offset_t)(intptr_t)(int32_t)0x80000000)
   95 /*
   96  * USRSTACK needs to start a little below 0x8000000 because the R8000
   97  * and some QED CPUs perform some virtual address checks before the
   98  * offset is calculated.
   99  */
  100 #define USRSTACK                (VM_MAXUSER_ADDRESS - PAGE_SIZE)
  101 #ifdef __mips_n64
  102 #define FREEBSD32_USRSTACK      (((vm_offset_t)0x80000000) - PAGE_SIZE)
  103 #endif
  104 
  105 /*
  106  * Disable superpage reservations. (not sure if this is right
  107  * I copied it from ARM)
  108  */
  109 #ifndef VM_NRESERVLEVEL
  110 #define VM_NRESERVLEVEL         0
  111 #endif
  112 
  113 /*
  114  * How many physical pages per kmem arena virtual page.
  115  */
  116 #ifndef VM_KMEM_SIZE_SCALE
  117 #define VM_KMEM_SIZE_SCALE      (3)
  118 #endif
  119 
  120 /*
  121  * Optional floor (in bytes) on the size of the kmem arena.
  122  */
  123 #ifndef VM_KMEM_SIZE_MIN
  124 #define VM_KMEM_SIZE_MIN        (12 * 1024 * 1024)
  125 #endif
  126 
  127 /*
  128  * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
  129  * kernel map.
  130  */
  131 #ifndef VM_KMEM_SIZE_MAX
  132 #define VM_KMEM_SIZE_MAX        ((VM_MAX_KERNEL_ADDRESS - \
  133     VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
  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 two 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            2
  160 #define VM_FREEPOOL_DEFAULT     0
  161 #define VM_FREEPOOL_DIRECT      1
  162 
  163 /*
  164  * Create up to two free lists on !__mips_n64: VM_FREELIST_DEFAULT is for
  165  * physical pages that are above the largest physical address that is
  166  * accessible through the direct map (KSEG0) and VM_FREELIST_LOWMEM is for
  167  * physical pages that are below that address.  VM_LOWMEM_BOUNDARY is the
  168  * physical address for the end of the direct map (KSEG0).
  169  */
  170 #ifdef __mips_n64
  171 #define VM_NFREELIST            1
  172 #define VM_FREELIST_DEFAULT     0
  173 #define VM_FREELIST_DIRECT      VM_FREELIST_DEFAULT
  174 #else
  175 #define VM_NFREELIST            2
  176 #define VM_FREELIST_DEFAULT     0
  177 #define VM_FREELIST_LOWMEM      1
  178 #define VM_FREELIST_DIRECT      VM_FREELIST_LOWMEM
  179 #define VM_LOWMEM_BOUNDARY      ((vm_paddr_t)0x20000000)
  180 #endif
  181 
  182 /*
  183  * The largest allocation size is 1MB.
  184  */
  185 #define VM_NFREEORDER           9
  186 
  187 #define ZERO_REGION_SIZE        (64 * 1024)     /* 64KB */
  188 
  189 #ifndef __mips_n64
  190 #define SFBUF
  191 #define SFBUF_MAP
  192 #define PMAP_HAS_DMAP   0
  193 #else
  194 #define PMAP_HAS_DMAP   1
  195 #endif
  196 
  197 #define PHYS_TO_DMAP(x) MIPS_PHYS_TO_DIRECT(x)
  198 #define DMAP_TO_PHYS(x) MIPS_DIRECT_TO_PHYS(x)
  199 
  200 #endif /* !_MACHINE_VMPARAM_H_ */

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