Home | History | Annotate | Line # | Download | only in uvm
uvm_pglist.h revision 1.5.118.1 
      1  1.5.118.1      mjf /*	$NetBSD: uvm_pglist.h,v 1.5.118.1 2008/06/02 13:24:38 mjf 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  *
     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        1.4      chs TAILQ_HEAD(pglist, vm_page);
     40        1.1      mrg 
     41        1.1      mrg /*
     42        1.1      mrg  * A page free list consists of free pages of unknown contents and free
     43        1.1      mrg  * pages of all zeros.
     44        1.1      mrg  */
     45        1.1      mrg #define	PGFL_UNKNOWN	0
     46        1.1      mrg #define	PGFL_ZEROS	1
     47        1.1      mrg #define	PGFL_NQUEUES	2
     48        1.1      mrg 
     49        1.2  thorpej struct pgflbucket {
     50        1.2  thorpej 	struct pglist pgfl_queues[PGFL_NQUEUES];
     51        1.2  thorpej };
     52        1.2  thorpej 
     53        1.1      mrg struct pgfreelist {
     54        1.3  thorpej 	struct pgflbucket *pgfl_buckets;
     55        1.1      mrg };
     56        1.1      mrg 
     57        1.5      chs #endif /* _UVM_UVM_PGLIST_H_ */
     58