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

     /*      $NetBSD: uvm_aobj.h,v 1.23 2013/10/18 17:48:44 christos 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 for uao_create: UAO_FLAG_KERNOBJ and UAO_FLAG_KERNSWAP are
     * used only once, to initialise UVM.
     */
    #define UAO_FLAG_KERNOBJ        0x1     /* create kernel object */
    #define UAO_FLAG_KERNSWAP       0x2     /* enable kernel swap */
    #define UAO_FLAG_NOSWAP         0x8     /* aobj may not swap */
    
    #ifdef _KERNEL
    #if defined(_KERNEL_OPT)
    #include "opt_vmswap.h"
    #endif
    
    void    uao_init(void);
    int     uao_set_swslot(struct uvm_object *, int, int);
    
    #if     defined(VMSWAP)
    int     uao_find_swslot(struct uvm_object *, int);
    void    uao_dropswap(struct uvm_object *, int);
    bool    uao_swap_off(int, int);
    void    uao_dropswap_range(struct uvm_object *, voff_t, voff_t);
    #else
    #define uao_find_swslot(obj, off)       (__USE(off), 0)
    #define uao_dropswap(obj, off)          /* nothing */
    #define uao_dropswap_range(obj, lo, hi) /* nothing */
    #endif
    
    #endif /* _KERNEL */
    
    #endif /* _UVM_UVM_AOBJ_H_ */

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