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Annotation of sys/uvm/uvm_pglist.h, Revision 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