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/arm/include/vmparam.h

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    1 /*      $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 1988 The Regents of the University of California.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD: releng/11.1/sys/arm/include/vmparam.h 318637 2017-05-22 12:35:31Z mmel $
   32  */
   33 
   34 #ifndef _MACHINE_VMPARAM_H_
   35 #define _MACHINE_VMPARAM_H_
   36 
   37 /*
   38  * Machine dependent constants for ARM.
   39  */
   40 
   41 /*
   42  * Virtual memory related constants, all in bytes
   43  */
   44 #ifndef MAXTSIZ
   45 #define MAXTSIZ         (256UL*1024*1024)       /* max text size */
   46 #endif
   47 #ifndef DFLDSIZ
   48 #define DFLDSIZ         (128UL*1024*1024)       /* initial data size limit */
   49 #endif
   50 #ifndef MAXDSIZ
   51 #define MAXDSIZ         (512UL*1024*1024)       /* max data size */
   52 #endif
   53 #ifndef DFLSSIZ
   54 #define DFLSSIZ         (2UL*1024*1024)         /* initial stack size limit */
   55 #endif
   56 #ifndef MAXSSIZ
   57 #define MAXSSIZ         (8UL*1024*1024)         /* max stack size */
   58 #endif
   59 #ifndef SGROWSIZ
   60 #define SGROWSIZ        (128UL*1024)            /* amount to grow stack */
   61 #endif
   62 
   63 /*
   64  * Address space constants
   65  */
   66 
   67 /*
   68  * The line between user space and kernel space
   69  * Mappings >= KERNEL_BASE are constant across all processes
   70  */
   71 #ifndef KERNBASE
   72 #define KERNBASE                0xc0000000
   73 #endif
   74 
   75 /*
   76  * max number of non-contig chunks of physical RAM you can have
   77  */
   78 
   79 #define VM_PHYSSEG_MAX          32
   80 
   81 /*
   82  * The physical address space may be sparsely populated on some ARM systems.
   83  */
   84 #define VM_PHYSSEG_SPARSE
   85 
   86 /*
   87  * Create one free page pool.  Since the ARM kernel virtual address
   88  * space does not include a mapping onto the machine's entire physical
   89  * memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
   90  * pool, VM_FREEPOOL_DEFAULT.
   91  */
   92 #define VM_NFREEPOOL            1
   93 #define VM_FREEPOOL_DEFAULT     0
   94 #define VM_FREEPOOL_DIRECT      0
   95 
   96 /*
   97  * We need just one free list:  DEFAULT.
   98  */
   99 #define VM_NFREELIST            1
  100 #define VM_FREELIST_DEFAULT     0
  101 
  102 /*
  103  * The largest allocation size is 1MB.
  104  */
  105 #define VM_NFREEORDER           9
  106 
  107 /*
  108  * Enable superpage reservations: 1 level.
  109  */
  110 #ifndef VM_NRESERVLEVEL
  111 #define VM_NRESERVLEVEL         1
  112 #endif
  113 
  114 /*
  115  * Level 0 reservations consist of 256 pages.
  116  */
  117 #ifndef VM_LEVEL_0_ORDER
  118 #define VM_LEVEL_0_ORDER        8
  119 #endif
  120 
  121 #define VM_MIN_ADDRESS          (0x00001000)
  122 #ifndef VM_MAXUSER_ADDRESS
  123 #define VM_MAXUSER_ADDRESS      (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
  124 #endif
  125 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
  126 
  127 #define SHAREDPAGE              (VM_MAXUSER_ADDRESS - PAGE_SIZE)
  128 #define USRSTACK                SHAREDPAGE
  129 
  130 /* initial pagein size of beginning of executable file */
  131 #ifndef VM_INITIAL_PAGEIN
  132 #define VM_INITIAL_PAGEIN       16
  133 #endif
  134 
  135 #ifndef VM_MIN_KERNEL_ADDRESS
  136 #define VM_MIN_KERNEL_ADDRESS KERNBASE
  137 #endif
  138 
  139 #define VM_MAX_KERNEL_ADDRESS   (vm_max_kernel_address)
  140 
  141 /*
  142  * How many physical pages per kmem arena virtual page.
  143  */
  144 #ifndef VM_KMEM_SIZE_SCALE
  145 #define VM_KMEM_SIZE_SCALE      (3)
  146 #endif
  147 
  148 /*
  149  * Optional floor (in bytes) on the size of the kmem arena.
  150  */
  151 #ifndef VM_KMEM_SIZE_MIN
  152 #define VM_KMEM_SIZE_MIN        (12 * 1024 * 1024)
  153 #endif
  154 
  155 /*
  156  * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
  157  * kernel map.
  158  */
  159 #ifndef VM_KMEM_SIZE_MAX
  160 #define VM_KMEM_SIZE_MAX        ((vm_max_kernel_address - \
  161     VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
  162 #endif
  163 
  164 extern vm_offset_t vm_max_kernel_address;
  165 
  166 #define ZERO_REGION_SIZE        (64 * 1024)     /* 64KB */
  167 
  168 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
  169 #define VM_MAX_AUTOTUNE_MAXUSERS        384
  170 #endif
  171 
  172 #define SFBUF
  173 #define SFBUF_MAP
  174 
  175 #define DEVMAP_MAX_VADDR        ARM_VECTORS_HIGH
  176 
  177 #endif  /* _MACHINE_VMPARAM_H_ */

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