FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_param.h

     /*-
      * SPDX-License-Identifier: (BSD-3-Clause AND MIT-CMU)
      *
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * The Mach Operating System project at Carnegie-Mellon University.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: @(#)vm_param.h    8.1 (Berkeley) 6/11/93
     *
     *
     * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     * All rights reserved.
     *
     * Authors: Avadis Tevanian, Jr., Michael Wayne Young
     *
     * Permission to use, copy, modify and distribute this software and
     * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     *
     * $FreeBSD: releng/12.0/sys/vm/vm_param.h 326403 2017-11-30 15:48:35Z pfg $
     */
    
    /*
     *      Machine independent virtual memory parameters.
     */
    
    #ifndef _VM_PARAM_
    #define _VM_PARAM_
    
    #include <machine/vmparam.h>
    
    /*
     * CTL_VM identifiers
     */
    #define VM_TOTAL                1       /* struct vmtotal */
    #define VM_METER                VM_TOTAL/* deprecated, use VM_TOTAL */
    #define VM_LOADAVG              2       /* struct loadavg */
    #define VM_V_FREE_MIN           3       /* vm_cnt.v_free_min */
    #define VM_V_FREE_TARGET        4       /* vm_cnt.v_free_target */
    #define VM_V_FREE_RESERVED      5       /* vm_cnt.v_free_reserved */
    #define VM_V_INACTIVE_TARGET    6       /* vm_cnt.v_inactive_target */
    #define VM_OBSOLETE_7           7       /* unused, formerly v_cache_min */
    #define VM_OBSOLETE_8           8       /* unused, formerly v_cache_max */
    #define VM_V_PAGEOUT_FREE_MIN   9       /* vm_cnt.v_pageout_free_min */
    #define VM_OBSOLETE_10          10      /* pageout algorithm */
    #define VM_SWAPPING_ENABLED     11      /* swapping enabled */
    #define VM_OVERCOMMIT           12      /* vm.overcommit */
    #define VM_MAXID                13      /* number of valid vm ids */
    
    /*
     * Structure for swap device statistics
     */
    #define XSWDEV_VERSION  2
    struct xswdev {
            u_int   xsw_version;
            dev_t   xsw_dev;
            int     xsw_flags;
           int     xsw_nblks;
           int     xsw_used;
   };
   
   /*
    *      Return values from the VM routines.
    */
   #define KERN_SUCCESS            0
   #define KERN_INVALID_ADDRESS    1
   #define KERN_PROTECTION_FAILURE 2
   #define KERN_NO_SPACE           3
   #define KERN_INVALID_ARGUMENT   4
   #define KERN_FAILURE            5
   #define KERN_RESOURCE_SHORTAGE  6
   #define KERN_NOT_RECEIVER       7
   #define KERN_NO_ACCESS          8
   
   #ifndef PA_LOCK_COUNT
   #ifdef SMP
   #define PA_LOCK_COUNT   32
   #else
   #define PA_LOCK_COUNT   1
   #endif  /* !SMP */
   #endif  /* !PA_LOCK_COUNT */
   
   #ifndef ASSEMBLER
   #ifdef _KERNEL
   #define num_pages(x) \
           ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
   extern  unsigned long maxtsiz;
   extern  unsigned long dfldsiz;
   extern  unsigned long maxdsiz;
   extern  unsigned long dflssiz;
   extern  unsigned long maxssiz;
   extern  unsigned long sgrowsiz;
   #endif                          /* _KERNEL */
   #endif                          /* ASSEMBLER */
   #endif                          /* _VM_PARAM_ */

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