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/vm/vm_param.h

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    1 /*-
    2  * SPDX-License-Identifier: (BSD-3-Clause AND MIT-CMU)
    3  *
    4  * Copyright (c) 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * The Mach Operating System project at Carnegie-Mellon University.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      from: @(#)vm_param.h    8.1 (Berkeley) 6/11/93
   35  *
   36  *
   37  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
   38  * All rights reserved.
   39  *
   40  * Authors: Avadis Tevanian, Jr., Michael Wayne Young
   41  *
   42  * Permission to use, copy, modify and distribute this software and
   43  * its documentation is hereby granted, provided that both the copyright
   44  * notice and this permission notice appear in all copies of the
   45  * software, derivative works or modified versions, and any portions
   46  * thereof, and that both notices appear in supporting documentation.
   47  *
   48  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   49  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   50  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   51  *
   52  * Carnegie Mellon requests users of this software to return to
   53  *
   54  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   55  *  School of Computer Science
   56  *  Carnegie Mellon University
   57  *  Pittsburgh PA 15213-3890
   58  *
   59  * any improvements or extensions that they make and grant Carnegie the
   60  * rights to redistribute these changes.
   61  *
   62  * $FreeBSD$
   63  */
   64 
   65 /*
   66  *      Machine independent virtual memory parameters.
   67  */
   68 
   69 #ifndef _VM_PARAM_
   70 #define _VM_PARAM_
   71 
   72 #include <machine/vmparam.h>
   73 
   74 /*
   75  * CTL_VM identifiers
   76  */
   77 #define VM_TOTAL                1       /* struct vmtotal */
   78 #define VM_METER                VM_TOTAL/* deprecated, use VM_TOTAL */
   79 #define VM_LOADAVG              2       /* struct loadavg */
   80 #define VM_V_FREE_MIN           3       /* vm_cnt.v_free_min */
   81 #define VM_V_FREE_TARGET        4       /* vm_cnt.v_free_target */
   82 #define VM_V_FREE_RESERVED      5       /* vm_cnt.v_free_reserved */
   83 #define VM_V_INACTIVE_TARGET    6       /* vm_cnt.v_inactive_target */
   84 #define VM_OBSOLETE_7           7       /* unused, formerly v_cache_min */
   85 #define VM_OBSOLETE_8           8       /* unused, formerly v_cache_max */
   86 #define VM_V_PAGEOUT_FREE_MIN   9       /* vm_cnt.v_pageout_free_min */
   87 #define VM_OBSOLETE_10          10      /* pageout algorithm */
   88 #define VM_SWAPPING_ENABLED     11      /* swapping enabled */
   89 #define VM_OVERCOMMIT           12      /* vm.overcommit */
   90 #define VM_MAXID                13      /* number of valid vm ids */
   91 
   92 /*
   93  * Structure for swap device statistics
   94  */
   95 #define XSWDEV_VERSION  2
   96 struct xswdev {
   97         u_int   xsw_version;
   98         dev_t   xsw_dev;
   99         int     xsw_flags;
  100         int     xsw_nblks;
  101         int     xsw_used;
  102 };
  103 
  104 /*
  105  *      Return values from the VM routines.
  106  */
  107 #define KERN_SUCCESS            0
  108 #define KERN_INVALID_ADDRESS    1
  109 #define KERN_PROTECTION_FAILURE 2
  110 #define KERN_NO_SPACE           3
  111 #define KERN_INVALID_ARGUMENT   4
  112 #define KERN_FAILURE            5
  113 #define KERN_RESOURCE_SHORTAGE  6
  114 #define KERN_NOT_RECEIVER       7
  115 #define KERN_NO_ACCESS          8
  116 #define KERN_OUT_OF_BOUNDS      9
  117 #define KERN_RESTART            10
  118 
  119 #ifndef PA_LOCK_COUNT
  120 #ifdef SMP
  121 #define PA_LOCK_COUNT   32
  122 #else
  123 #define PA_LOCK_COUNT   1
  124 #endif  /* !SMP */
  125 #endif  /* !PA_LOCK_COUNT */
  126 
  127 #ifndef KSTACK_MAX_PAGES
  128 #define KSTACK_MAX_PAGES 32
  129 #endif
  130 
  131 #ifndef PHYS_AVAIL_ENTRIES
  132 #define PHYS_AVAIL_ENTRIES      (VM_PHYSSEG_MAX * 2)
  133 #endif
  134 #define PHYS_AVAIL_COUNT        (PHYS_AVAIL_ENTRIES + 2)
  135 
  136 #ifndef ASSEMBLER
  137 #ifdef _KERNEL
  138 #define num_pages(x) \
  139         ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
  140 extern  unsigned long maxtsiz;
  141 extern  unsigned long dfldsiz;
  142 extern  unsigned long maxdsiz;
  143 extern  unsigned long dflssiz;
  144 extern  unsigned long maxssiz;
  145 extern  unsigned long sgrowsiz;
  146 #endif                          /* _KERNEL */
  147 #endif                          /* ASSEMBLER */
  148 #endif                          /* _VM_PARAM_ */

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