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/* $NetBSD: uvm_pglist.h,v 1.8 2010/11/06 15:48:00 uebayasi Exp $ */
/*-
* Copyright (c) 2000, 2001, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _UVM_UVM_PGLIST_H_
#define _UVM_UVM_PGLIST_H_
/*
* This defines the type of a page queue, e.g. active list, inactive
* list, etc.
*/
struct vm_page;
TAILQ_HEAD(pglist, vm_page);
LIST_HEAD(pgflist, vm_page);
/*
* A page free list consists of free pages of unknown contents and free
* pages of all zeros.
*/
#define PGFL_UNKNOWN 0
#define PGFL_ZEROS 1
#define PGFL_NQUEUES 2
struct pgflbucket {
struct pgflist pgfl_queues[PGFL_NQUEUES];
};
struct pgfreelist {
struct pgflbucket *pgfl_buckets;
};
#endif /* _UVM_UVM_PGLIST_H_ */
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