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/9.0/sys/arm/include/vmparam.h 221855 2011-05-13 19:35:01Z mdf $
   32  */
   33 
   34 #ifndef _MACHINE_VMPARAM_H_
   35 #define _MACHINE_VMPARAM_H_
   36 
   37 
   38 /*#include <arm/arm32/vmparam.h>
   39 */
   40 /*
   41  * Address space constants
   42  */
   43 
   44 /*
   45  * The line between user space and kernel space
   46  * Mappings >= KERNEL_BASE are constant across all processes
   47  */
   48 #define KERNBASE                0xc0000000
   49 
   50 /*
   51  * max number of non-contig chunks of physical RAM you can have
   52  */
   53 
   54 #define VM_PHYSSEG_MAX          32
   55 
   56 /*
   57  * The physical address space is densely populated.
   58  */
   59 #define VM_PHYSSEG_DENSE
   60 
   61 /*
   62  * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
   63  * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
   64  * the pool from which physical pages for small UMA objects are
   65  * allocated.
   66  */
   67 #define VM_NFREEPOOL            3
   68 #define VM_FREEPOOL_CACHE       2
   69 #define VM_FREEPOOL_DEFAULT     0
   70 #define VM_FREEPOOL_DIRECT      1
   71 
   72 /*
   73  * we support 2 free lists:
   74  *
   75  *      - DEFAULT for all systems
   76  *      - ISADMA for the ISA DMA range on Sharks only
   77  */
   78 
   79 #define VM_NFREELIST            2
   80 #define VM_FREELIST_DEFAULT     0
   81 #define VM_FREELIST_ISADMA      1
   82 
   83 /*
   84  * The largest allocation size is 1MB.
   85  */
   86 #define VM_NFREEORDER           9
   87 
   88 /*
   89  * Only one memory domain.
   90  */
   91 #ifndef VM_NDOMAIN
   92 #define VM_NDOMAIN              1
   93 #endif
   94 
   95 /*
   96  * Disable superpage reservations.
   97  */
   98 #ifndef VM_NRESERVLEVEL
   99 #define VM_NRESERVLEVEL         0
  100 #endif
  101 
  102 #define UPT_MAX_ADDRESS         VADDR(UPTPTDI + 3, 0)
  103 #define UPT_MIN_ADDRESS         VADDR(UPTPTDI, 0)
  104 
  105 #define VM_MIN_ADDRESS          (0x00001000)
  106 #ifdef ARM_USE_SMALL_ALLOC
  107 /* 
  108  * ARM_KERN_DIRECTMAP is used to make sure there's enough space between
  109  * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory.
  110  * It has to be a compile-time constant, even if arm_init_smallalloc(),
  111  * which will do the mapping, gets the real amount of memory at runtime,
  112  * because VM_MAXUSER_ADDRESS is a constant.
  113  */
  114 #ifndef ARM_KERN_DIRECTMAP
  115 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */
  116 #endif
  117 #define VM_MAXUSER_ADDRESS      KERNBASE - ARM_KERN_DIRECTMAP
  118 #else /* ARM_USE_SMALL_ALLOC */
  119 #define VM_MAXUSER_ADDRESS      KERNBASE
  120 #endif /* ARM_USE_SMALL_ALLOC */
  121 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
  122 
  123 #define USRSTACK        VM_MAXUSER_ADDRESS
  124 
  125 /* initial pagein size of beginning of executable file */
  126 #ifndef VM_INITIAL_PAGEIN
  127 #define VM_INITIAL_PAGEIN       16
  128 #endif
  129 
  130 #ifndef VM_MIN_KERNEL_ADDRESS
  131 #define VM_MIN_KERNEL_ADDRESS KERNBASE
  132 #endif
  133 
  134 #define VM_MAX_KERNEL_ADDRESS   0xffffffff
  135 /*
  136  * Virtual size (bytes) for various kernel submaps.
  137  */
  138 
  139 #ifndef VM_KMEM_SIZE
  140 #define VM_KMEM_SIZE            (12*1024*1024)
  141 #endif
  142 
  143 #define MAXTSIZ         (16*1024*1024)
  144 #define DFLDSIZ         (128*1024*1024)
  145 #define MAXDSIZ         (512*1024*1024)
  146 #define DFLSSIZ         (2*1024*1024)
  147 #define MAXSSIZ         (8*1024*1024)
  148 #define SGROWSIZ        (128*1024)
  149 
  150 #ifdef ARM_USE_SMALL_ALLOC
  151 #define UMA_MD_SMALL_ALLOC
  152 #endif /* ARM_USE_SMALL_ALLOC */
  153 
  154 #define ZERO_REGION_SIZE        (64 * 1024)     /* 64KB */
  155 
  156 #endif  /* _MACHINE_VMPARAM_H_ */

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