f9d8cc1a37
based on diff that rmind@ sent me (and confirmed with chs@ via email). no functional change with this commit.
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* $NetBSD: uvm_aobj.h,v 1.21 2011/02/02 15:28:38 chuck 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
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*/
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/* flags for uao_create: can only be used one time (at bootup) */
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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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/* internal flags */
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#define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */
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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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/*
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* prototypes
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*/
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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 /* defined(VMSWAP) */
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#define uao_find_swslot(obj, 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 /* defined(VMSWAP) */
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#endif /* _KERNEL */
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#endif /* _UVM_UVM_AOBJ_H_ */
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