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Annotation of sys/uvm/uvm_pglist.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: uvm_pglist.h,v 1.5 2001/12/19 08:58:07 art Exp $      */
                      2: /*     $NetBSD: uvm_pglist.h,v 1.3 2001/05/02 01:22:20 thorpej Exp $   */
                      3:
                      4: /*-
                      5:  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by Jason R. Thorpe.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the NetBSD
                     22:  *     Foundation, Inc. and its contributors.
                     23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     24:  *    contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     37:  * POSSIBILITY OF SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef _PGLIST_H_
                     41: #define _PGLIST_H_
                     42:
                     43: /*
                     44:  * This defines the type of a page queue, e.g. active list, inactive
                     45:  * list, etc.
                     46:  */
                     47: TAILQ_HEAD(pglist, vm_page);
                     48:
                     49: /*
                     50:  * A page free list consists of free pages of unknown contents and free
                     51:  * pages of all zeros.
                     52:  */
                     53: #define        PGFL_UNKNOWN    0
                     54: #define        PGFL_ZEROS      1
                     55: #define        PGFL_NQUEUES    2
                     56:
                     57: struct pgfreelist {
                     58:        struct pglist pgfl_queues[PGFL_NQUEUES];
                     59: };
                     60:
                     61: #endif