The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_pager_i.h

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    1 /*      $NetBSD: uvm_pager_i.h,v 1.12 2002/12/01 22:58:43 matt Exp $    */
    2 
    3 /*
    4  *
    5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Charles D. Cranor and
   19  *      Washington University.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * from: Id: uvm_pager_i.h,v 1.1.2.2 1997/10/09 23:05:46 chuck Exp
   35  */
   36 
   37 /*
   38  * uvm_pager_i.h
   39  */
   40 
   41 /*
   42  * inline functions [maybe]
   43  */
   44 
   45 #if defined(UVM_PAGER_INLINE) || defined(UVM_PAGER)
   46 
   47 #ifndef _UVM_UVM_PAGER_I_H_
   48 #define _UVM_UVM_PAGER_I_H_
   49 
   50 /*
   51  * uvm_pageratop: convert KVAs in the pager map back to their page
   52  * structures.
   53  */
   54 
   55 PAGER_INLINE struct vm_page *
   56 uvm_pageratop(kva)
   57         vaddr_t kva;
   58 {
   59         struct vm_page *pg;
   60         paddr_t pa;
   61         boolean_t rv;
   62 
   63         rv = pmap_extract(pmap_kernel(), kva, &pa);
   64         KASSERT(rv);
   65         pg = PHYS_TO_VM_PAGE(pa);
   66         KASSERT(pg != NULL);
   67         return (pg);
   68 }
   69 
   70 #endif /* _UVM_UVM_PAGER_I_H_ */
   71 
   72 #endif /* defined(UVM_PAGER_INLINE) || defined(UVM_PAGER) */

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