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/uvm/uvm_aobj.h

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    1 /*      $NetBSD: uvm_aobj.h,v 1.18 2005/12/11 12:25:29 christos Exp $   */
    2 
    3 /*
    4  * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
    5  *                    Washington University.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Charles D. Cranor and
   19  *      Washington University.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
   35  */
   36 /*
   37  * uvm_aobj.h: anonymous memory uvm_object pager
   38  *
   39  * author: Chuck Silvers <chuq@chuq.com>
   40  * started: Jan-1998
   41  *
   42  * - design mostly from Chuck Cranor
   43  */
   44 
   45 #ifndef _UVM_UVM_AOBJ_H_
   46 #define _UVM_UVM_AOBJ_H_
   47 
   48 /*
   49  * flags
   50  */
   51 
   52 /* flags for uao_create: can only be used one time (at bootup) */
   53 #define UAO_FLAG_KERNOBJ        0x1     /* create kernel object */
   54 #define UAO_FLAG_KERNSWAP       0x2     /* enable kernel swap */
   55 
   56 /* internal flags */
   57 #define UAO_FLAG_NOSWAP         0x8     /* aobj can't swap (kernel obj only!) */
   58 
   59 #ifdef _KERNEL
   60 #if defined(_KERNEL_OPT)
   61 #include "opt_vmswap.h"
   62 #endif
   63 
   64 /*
   65  * prototypes
   66  */
   67 
   68 void uao_init(void);
   69 int uao_set_swslot(struct uvm_object *, int, int);
   70 #if defined(VMSWAP)
   71 int uao_find_swslot(struct uvm_object *, int);
   72 void uao_dropswap(struct uvm_object *, int);
   73 int uao_swap_off(int, int);
   74 void uao_dropswap_range(struct uvm_object *, voff_t, voff_t);
   75 #else /* defined(VMSWAP) */
   76 #define uao_find_swslot(obj, off)       0
   77 #define uao_dropswap(obj, off)          /* nothing */
   78 #define uao_dropswap_range(obj, lo, hi) /* nothing */
   79 #endif /* defined(VMSWAP) */
   80 
   81 /*
   82  * globals
   83  */
   84 
   85 extern struct uvm_pagerops aobj_pager;
   86 
   87 #endif /* _KERNEL */
   88 
   89 #endif /* _UVM_UVM_AOBJ_H_ */

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