FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_aobj.h

     /*      $OpenBSD: uvm_aobj.h,v 1.19 2022/07/24 11:00:22 mpi Exp $       */
     /*      $NetBSD: uvm_aobj.h,v 1.10 2000/01/11 06:57:49 chs Exp $        */
     
     /*
      * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
      *                    Washington University.
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
     */
    /*
     * uvm_aobj.h: anonymous memory uvm_object pager
     *
     * author: Chuck Silvers <chuq@chuq.com>
     * started: Jan-1998
     *
     * - design mostly from Chuck Cranor
     */
    
    #ifndef _UVM_UVM_AOBJ_H_
    #define _UVM_UVM_AOBJ_H_
    
    /*
     * flags
     */
    
    /* flags for uao_create: can only be used one time (at bootup) */
    #define UAO_FLAG_KERNOBJ        0x1     /* create kernel object */
    #define UAO_FLAG_KERNSWAP       0x2     /* enable kernel swap */
    #define UAO_FLAG_CANFAIL        0x4     /* creation can fail */
    
    /* internal flags */
    #define UAO_FLAG_NOSWAP         0x8     /* aobj can't swap (kernel obj only!) */
    
    #ifdef _KERNEL
    
    /*
     * prototypes
     */
    
    void uao_init(void);
    int uao_set_swslot(struct uvm_object *, int, int);
    int uao_dropswap(struct uvm_object *, int);
    int uao_swap_off(int, int);
    int uao_shrink(struct uvm_object *, int);
    int uao_grow(struct uvm_object *, int);
    
    /*
     * globals
     */
    
    extern const struct uvm_pagerops aobj_pager;
    
    #endif /* _KERNEL */
    
    #endif /* _UVM_UVM_AOBJ_H_ */

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