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uvm_pglist.h revision 1.8 
      1  1.8  uebayasi /*	$NetBSD: uvm_pglist.h,v 1.8 2010/11/06 15:48:00 uebayasi Exp $	*/
      2  1.1       mrg 
      3  1.1       mrg /*-
      4  1.7        ad  * Copyright (c) 2000, 2001, 2008 The NetBSD Foundation, Inc.
      5  1.1       mrg  * All rights reserved.
      6  1.1       mrg  *
      7  1.1       mrg  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1       mrg  * by Jason R. Thorpe.
      9  1.1       mrg  *
     10  1.1       mrg  * Redistribution and use in source and binary forms, with or without
     11  1.1       mrg  * modification, are permitted provided that the following conditions
     12  1.1       mrg  * are met:
     13  1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     14  1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     15  1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     17  1.1       mrg  *    documentation and/or other materials provided with the distribution.
     18  1.1       mrg  *
     19  1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1       mrg  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1       mrg  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1       mrg  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1       mrg  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1       mrg  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1       mrg  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1       mrg  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1       mrg  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1       mrg  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1       mrg  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1       mrg  */
     31  1.1       mrg 
     32  1.5       chs #ifndef _UVM_UVM_PGLIST_H_
     33  1.5       chs #define _UVM_UVM_PGLIST_H_
     34  1.1       mrg 
     35  1.1       mrg /*
     36  1.1       mrg  * This defines the type of a page queue, e.g. active list, inactive
     37  1.1       mrg  * list, etc.
     38  1.1       mrg  */
     39  1.8  uebayasi struct vm_page;
     40  1.4       chs TAILQ_HEAD(pglist, vm_page);
     41  1.7        ad LIST_HEAD(pgflist, vm_page);
     42  1.1       mrg 
     43  1.1       mrg /*
     44  1.1       mrg  * A page free list consists of free pages of unknown contents and free
     45  1.1       mrg  * pages of all zeros.
     46  1.1       mrg  */
     47  1.1       mrg #define	PGFL_UNKNOWN	0
     48  1.1       mrg #define	PGFL_ZEROS	1
     49  1.1       mrg #define	PGFL_NQUEUES	2
     50  1.1       mrg 
     51  1.2   thorpej struct pgflbucket {
     52  1.7        ad 	struct pgflist pgfl_queues[PGFL_NQUEUES];
     53  1.2   thorpej };
     54  1.2   thorpej 
     55  1.1       mrg struct pgfreelist {
     56  1.3   thorpej 	struct pgflbucket *pgfl_buckets;
     57  1.1       mrg };
     58  1.1       mrg 
     59  1.5       chs #endif /* _UVM_UVM_PGLIST_H_ */
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