60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* $NetBSD: uvm_pglist.h,v 1.8 2010/11/06 15:48:00 uebayasi Exp $ */
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/*-
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* Copyright (c) 2000, 2001, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _UVM_UVM_PGLIST_H_
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#define _UVM_UVM_PGLIST_H_
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/*
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* This defines the type of a page queue, e.g. active list, inactive
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* list, etc.
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*/
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struct vm_page;
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TAILQ_HEAD(pglist, vm_page);
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LIST_HEAD(pgflist, vm_page);
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/*
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* A page free list consists of free pages of unknown contents and free
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* pages of all zeros.
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*/
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#define PGFL_UNKNOWN 0
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#define PGFL_ZEROS 1
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#define PGFL_NQUEUES 2
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struct pgflbucket {
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struct pgflist pgfl_queues[PGFL_NQUEUES];
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};
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struct pgfreelist {
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struct pgflbucket *pgfl_buckets;
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};
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#endif /* _UVM_UVM_PGLIST_H_ */
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