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

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    1 /*      $NetBSD: uvm_aobj.h,v 1.21 2011/02/02 15:28:38 chuck 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  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
   29  */
   30 /*
   31  * uvm_aobj.h: anonymous memory uvm_object pager
   32  *
   33  * author: Chuck Silvers <chuq@chuq.com>
   34  * started: Jan-1998
   35  *
   36  * - design mostly from Chuck Cranor
   37  */
   38 
   39 #ifndef _UVM_UVM_AOBJ_H_
   40 #define _UVM_UVM_AOBJ_H_
   41 
   42 /*
   43  * flags
   44  */
   45 
   46 /* flags for uao_create: can only be used one time (at bootup) */
   47 #define UAO_FLAG_KERNOBJ        0x1     /* create kernel object */
   48 #define UAO_FLAG_KERNSWAP       0x2     /* enable kernel swap */
   49 
   50 /* internal flags */
   51 #define UAO_FLAG_NOSWAP         0x8     /* aobj can't swap (kernel obj only!) */
   52 
   53 #ifdef _KERNEL
   54 #if defined(_KERNEL_OPT)
   55 #include "opt_vmswap.h"
   56 #endif
   57 
   58 /*
   59  * prototypes
   60  */
   61 
   62 void uao_init(void);
   63 int uao_set_swslot(struct uvm_object *, int, int);
   64 #if defined(VMSWAP)
   65 int uao_find_swslot(struct uvm_object *, int);
   66 void uao_dropswap(struct uvm_object *, int);
   67 bool uao_swap_off(int, int);
   68 void uao_dropswap_range(struct uvm_object *, voff_t, voff_t);
   69 #else /* defined(VMSWAP) */
   70 #define uao_find_swslot(obj, off)       0
   71 #define uao_dropswap(obj, off)          /* nothing */
   72 #define uao_dropswap_range(obj, lo, hi) /* nothing */
   73 #endif /* defined(VMSWAP) */
   74 
   75 #endif /* _KERNEL */
   76 
   77 #endif /* _UVM_UVM_AOBJ_H_ */

Cache object: 518a70ecbf1dad1afd9b1deec7823060


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