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uvm_page.h revision 1.7 
      1 /*	$NetBSD: uvm_page.h,v 1.7 1998/03/22 21:29:30 chuck Exp $	*/
      2 
      3 /*
      4  * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
      5  *         >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
      6  */
      7 /*
      8  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      9  * Copyright (c) 1991, 1993, The Regents of the University of California.
     10  *
     11  * All rights reserved.
     12  *
     13  * This code is derived from software contributed to Berkeley by
     14  * The Mach Operating System project at Carnegie-Mellon University.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by Charles D. Cranor,
     27  *      Washington University, the University of California, Berkeley and
     28  *      its contributors.
     29  * 4. Neither the name of the University nor the names of its contributors
     30  *    may be used to endorse or promote products derived from this software
     31  *    without specific prior written permission.
     32  *
     33  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     36  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     43  * SUCH DAMAGE.
     44  *
     45  *	@(#)vm_page.h   7.3 (Berkeley) 4/21/91
     46  * from: Id: uvm_page.h,v 1.1.2.6 1998/02/04 02:31:42 chuck Exp
     47  *
     48  *
     49  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     50  * All rights reserved.
     51  *
     52  * Permission to use, copy, modify and distribute this software and
     53  * its documentation is hereby granted, provided that both the copyright
     54  * notice and this permission notice appear in all copies of the
     55  * software, derivative works or modified versions, and any portions
     56  * thereof, and that both notices appear in supporting documentation.
     57  *
     58  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     59  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     60  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     61  *
     62  * Carnegie Mellon requests users of this software to return to
     63  *
     64  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     65  *  School of Computer Science
     66  *  Carnegie Mellon University
     67  *  Pittsburgh PA 15213-3890
     68  *
     69  * any improvements or extensions that they make and grant Carnegie the
     70  * rights to redistribute these changes.
     71  */
     72 
     73 #ifndef _UVM_UVM_PAGE_H_
     74 #define _UVM_UVM_PAGE_H_
     75 
     76 /*
     77  * uvm_page.h
     78  */
     79 
     80 /*
     81  * macros
     82  */
     83 
     84 #define uvm_lock_pageq()	simple_lock(&uvm.pageqlock)
     85 #define uvm_unlock_pageq()	simple_unlock(&uvm.pageqlock)
     86 #define uvm_lock_fpageq()	simple_lock(&uvm.fpageqlock)
     87 #define uvm_unlock_fpageq()	simple_unlock(&uvm.fpageqlock)
     88 
     89 #define uvm_pagehash(obj,off) \
     90 	(((unsigned long)obj+(unsigned long)atop(off)) & uvm.page_hashmask)
     91 
     92 /*
     93  * handle inline options
     94  */
     95 
     96 #ifdef UVM_PAGE_INLINE
     97 #define PAGE_INLINE static __inline
     98 #else
     99 #define PAGE_INLINE /* nothing */
    100 #endif /* UVM_PAGE_INLINE */
    101 
    102 /*
    103  * prototypes: the following prototypes define the interface to amaps
    104  */
    105 
    106 void uvm_page_init __P((vm_offset_t *, vm_offset_t *));
    107 #if defined(UVM_PAGE_TRKOWN)
    108 void uvm_page_own __P((struct vm_page *, char *));
    109 #endif
    110 void uvm_page_rehash __P((void));
    111 PAGE_INLINE void uvm_pageactivate __P((struct vm_page *));
    112 vm_offset_t uvm_pageboot_alloc __P((vm_size_t));
    113 PAGE_INLINE void uvm_pagecopy __P((struct vm_page *, struct vm_page *));
    114 PAGE_INLINE void uvm_pagedeactivate __P((struct vm_page *));
    115 void uvm_pagefree __P((struct vm_page *));
    116 PAGE_INLINE struct vm_page *uvm_pagelookup
    117 					__P((struct uvm_object *, vm_offset_t));
    118 void uvm_pageremove __P((struct vm_page *));
    119 /* uvm_pagerename: not needed */
    120 PAGE_INLINE void uvm_pageunwire __P((struct vm_page *));
    121 PAGE_INLINE void uvm_pagewait __P((struct vm_page *, int));
    122 PAGE_INLINE void uvm_pagewake __P((struct vm_page *));
    123 PAGE_INLINE void uvm_pagewire __P((struct vm_page *));
    124 PAGE_INLINE void uvm_pagezero __P((struct vm_page *));
    125 
    126 #endif /* _UVM_UVM_PAGE_H_ */
    127