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uvm_pglist.h revision 1.5 
      1  1.5      chs /*	$NetBSD: uvm_pglist.h,v 1.5 2001/08/25 20:37:46 chs Exp $	*/
      2  1.1      mrg 
      3  1.1      mrg /*-
      4  1.2  thorpej  * Copyright (c) 2000, 2001 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  * 3. All advertising materials mentioning features or use of this software
     19  1.1      mrg  *    must display the following acknowledgement:
     20  1.1      mrg  *	This product includes software developed by the NetBSD
     21  1.1      mrg  *	Foundation, Inc. and its contributors.
     22  1.1      mrg  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  1.1      mrg  *    contributors may be used to endorse or promote products derived
     24  1.1      mrg  *    from this software without specific prior written permission.
     25  1.1      mrg  *
     26  1.1      mrg  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  1.1      mrg  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  1.1      mrg  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  1.1      mrg  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  1.1      mrg  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  1.1      mrg  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  1.1      mrg  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  1.1      mrg  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  1.1      mrg  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  1.1      mrg  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  1.1      mrg  * POSSIBILITY OF SUCH DAMAGE.
     37  1.1      mrg  */
     38  1.1      mrg 
     39  1.5      chs #ifndef _UVM_UVM_PGLIST_H_
     40  1.5      chs #define _UVM_UVM_PGLIST_H_
     41  1.1      mrg 
     42  1.1      mrg /*
     43  1.1      mrg  * This defines the type of a page queue, e.g. active list, inactive
     44  1.1      mrg  * list, etc.
     45  1.1      mrg  */
     46  1.4      chs TAILQ_HEAD(pglist, vm_page);
     47  1.1      mrg 
     48  1.1      mrg /*
     49  1.1      mrg  * A page free list consists of free pages of unknown contents and free
     50  1.1      mrg  * pages of all zeros.
     51  1.1      mrg  */
     52  1.1      mrg #define	PGFL_UNKNOWN	0
     53  1.1      mrg #define	PGFL_ZEROS	1
     54  1.1      mrg #define	PGFL_NQUEUES	2
     55  1.1      mrg 
     56  1.2  thorpej struct pgflbucket {
     57  1.2  thorpej 	struct pglist pgfl_queues[PGFL_NQUEUES];
     58  1.2  thorpej };
     59  1.2  thorpej 
     60  1.1      mrg struct pgfreelist {
     61  1.3  thorpej 	struct pgflbucket *pgfl_buckets;
     62  1.1      mrg };
     63  1.1      mrg 
     64  1.5      chs #endif /* _UVM_UVM_PGLIST_H_ */
     65