root / lab4 / .minix-src / include / uvm / uvm_aobj.h @ 14
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/* $NetBSD: uvm_aobj.h,v 1.23 2013/10/18 17:48:44 christos Exp $ */
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/*
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* Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
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* Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
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*/
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/*
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* uvm_aobj.h: anonymous memory uvm_object pager
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*
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* author: Chuck Silvers <chuq@chuq.com>
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* started: Jan-1998
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*
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* - design mostly from Chuck Cranor
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*/
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#ifndef _UVM_UVM_AOBJ_H_
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#define _UVM_UVM_AOBJ_H_
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/*
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* Flags for uao_create: UAO_FLAG_KERNOBJ and UAO_FLAG_KERNSWAP are
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* used only once, to initialise UVM.
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*/
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#define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */ |
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#define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */ |
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#define UAO_FLAG_NOSWAP 0x8 /* aobj may not swap */ |
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#ifdef _KERNEL
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#if defined(_KERNEL_OPT)
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#include "opt_vmswap.h" |
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#endif
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void uao_init(void); |
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int uao_set_swslot(struct uvm_object *, int, int); |
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#if defined(VMSWAP)
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int uao_find_swslot(struct uvm_object *, int); |
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void uao_dropswap(struct uvm_object *, int); |
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bool uao_swap_off(int, int); |
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void uao_dropswap_range(struct uvm_object *, voff_t, voff_t); |
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#else
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#define uao_find_swslot(obj, off) (__USE(off), 0) |
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#define uao_dropswap(obj, off) /* nothing */ |
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#define uao_dropswap_range(obj, lo, hi) /* nothing */ |
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#endif
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#endif /* _KERNEL */ |
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#endif /* _UVM_UVM_AOBJ_H_ */ |