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uvm_page.h revision 1.14 
      1 /*	$NetBSD: uvm_page.h,v 1.14 2000/03/26 20:54:47 kleink Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      5  * Copyright (c) 1991, 1993, The Regents of the University of California.
      6  *
      7  * All rights reserved.
      8  *
      9  * This code is derived from software contributed to Berkeley by
     10  * The Mach Operating System project at Carnegie-Mellon University.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by Charles D. Cranor,
     23  *      Washington University, the University of California, Berkeley and
     24  *      its contributors.
     25  * 4. Neither the name of the University nor the names of its contributors
     26  *    may be used to endorse or promote products derived from this software
     27  *    without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     39  * SUCH DAMAGE.
     40  *
     41  *	@(#)vm_page.h   7.3 (Berkeley) 4/21/91
     42  * from: Id: uvm_page.h,v 1.1.2.6 1998/02/04 02:31:42 chuck Exp
     43  *
     44  *
     45  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     46  * All rights reserved.
     47  *
     48  * Permission to use, copy, modify and distribute this software and
     49  * its documentation is hereby granted, provided that both the copyright
     50  * notice and this permission notice appear in all copies of the
     51  * software, derivative works or modified versions, and any portions
     52  * thereof, and that both notices appear in supporting documentation.
     53  *
     54  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     55  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     56  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     57  *
     58  * Carnegie Mellon requests users of this software to return to
     59  *
     60  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     61  *  School of Computer Science
     62  *  Carnegie Mellon University
     63  *  Pittsburgh PA 15213-3890
     64  *
     65  * any improvements or extensions that they make and grant Carnegie the
     66  * rights to redistribute these changes.
     67  */
     68 
     69 #ifndef _UVM_UVM_PAGE_H_
     70 #define _UVM_UVM_PAGE_H_
     71 
     72 /*
     73  * uvm_page.h
     74  */
     75 
     76 #ifdef _KERNEL
     77 
     78 /*
     79  * macros
     80  */
     81 
     82 #define uvm_lock_pageq()	simple_lock(&uvm.pageqlock)
     83 #define uvm_unlock_pageq()	simple_unlock(&uvm.pageqlock)
     84 
     85 #define uvm_pagehash(obj,off) \
     86 	(((unsigned long)obj+(unsigned long)atop(off)) & uvm.page_hashmask)
     87 
     88 /*
     89  * handle inline options
     90  */
     91 
     92 #ifdef UVM_PAGE_INLINE
     93 #define PAGE_INLINE static __inline
     94 #else
     95 #define PAGE_INLINE /* nothing */
     96 #endif /* UVM_PAGE_INLINE */
     97 
     98 /*
     99  * prototypes: the following prototypes define the interface to pages
    100  */
    101 
    102 void uvm_page_init __P((vaddr_t *, vaddr_t *));
    103 #if defined(UVM_PAGE_TRKOWN)
    104 void uvm_page_own __P((struct vm_page *, char *));
    105 #endif
    106 #if !defined(PMAP_STEAL_MEMORY)
    107 boolean_t uvm_page_physget __P((paddr_t *));
    108 #endif
    109 void uvm_page_rehash __P((void));
    110 
    111 PAGE_INLINE int uvm_lock_fpageq __P((void));
    112 PAGE_INLINE void uvm_unlock_fpageq __P((int));
    113 
    114 PAGE_INLINE void uvm_pageactivate __P((struct vm_page *));
    115 vaddr_t uvm_pageboot_alloc __P((vsize_t));
    116 PAGE_INLINE void uvm_pagecopy __P((struct vm_page *, struct vm_page *));
    117 PAGE_INLINE void uvm_pagedeactivate __P((struct vm_page *));
    118 void uvm_pagefree __P((struct vm_page *));
    119 PAGE_INLINE struct vm_page *uvm_pagelookup __P((struct uvm_object *, voff_t));
    120 void uvm_pageremove __P((struct vm_page *));
    121 /* uvm_pagerename: not needed */
    122 PAGE_INLINE void uvm_pageunwire __P((struct vm_page *));
    123 PAGE_INLINE void uvm_pagewait __P((struct vm_page *, int));
    124 PAGE_INLINE void uvm_pagewake __P((struct vm_page *));
    125 PAGE_INLINE void uvm_pagewire __P((struct vm_page *));
    126 PAGE_INLINE void uvm_pagezero __P((struct vm_page *));
    127 
    128 PAGE_INLINE int uvm_page_lookup_freelist __P((struct vm_page *));
    129 
    130 #endif /* _KERNEL */
    131 
    132 #endif /* _UVM_UVM_PAGE_H_ */
    133