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

1.1       nbrk        1: /*     $OpenBSD: uvm_pager_i.h,v 1.10 2001/12/19 08:58:07 art Exp $    */
                      2: /*     $NetBSD: uvm_pager_i.h,v 1.10 2000/11/25 06:28:00 chs Exp $     */
                      3:
                      4: /*
                      5:  *
                      6:  * Copyright (c) 1997 Charles D. Cranor and Washington University.
                      7:  * All rights reserved.
                      8:  *
                      9:  * Redistribution and use in source and binary forms, with or without
                     10:  * modification, are permitted provided that the following conditions
                     11:  * are met:
                     12:  * 1. Redistributions of source code must retain the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer.
                     14:  * 2. Redistributions in binary form must reproduce the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer in the
                     16:  *    documentation and/or other materials provided with the distribution.
                     17:  * 3. All advertising materials mentioning features or use of this software
                     18:  *    must display the following acknowledgement:
                     19:  *      This product includes software developed by Charles D. Cranor and
                     20:  *      Washington University.
                     21:  * 4. The name of the author may not be used to endorse or promote products
                     22:  *    derived from this software without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     25:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     26:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     27:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     28:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     29:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     30:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     31:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     32:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     33:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     34:  *
                     35:  * from: Id: uvm_pager_i.h,v 1.1.2.2 1997/10/09 23:05:46 chuck Exp
                     36:  */
                     37:
                     38: #ifndef _UVM_UVM_PAGER_I_H_
                     39: #define _UVM_UVM_PAGER_I_H_
                     40:
                     41: /*
                     42:  * uvm_pager_i.h
                     43:  */
                     44:
                     45: /*
                     46:  * inline functions [maybe]
                     47:  */
                     48:
                     49: #if defined(UVM_PAGER_INLINE) || defined(UVM_PAGER)
                     50:
                     51: /*
                     52:  * uvm_pageratop: convert KVAs in the pager map back to their page
                     53:  * structures.
                     54:  */
                     55:
                     56: PAGER_INLINE struct vm_page *
                     57: uvm_pageratop(kva)
                     58:        vaddr_t kva;
                     59: {
                     60:        struct vm_page *pg;
                     61:        paddr_t pa;
                     62:        boolean_t rv;
                     63:
                     64:        rv = pmap_extract(pmap_kernel(), kva, &pa);
                     65:        KASSERT(rv);
                     66:        pg = PHYS_TO_VM_PAGE(pa);
                     67:        KASSERT(pg != NULL);
                     68:        return (pg);
                     69: }
                     70:
                     71: #endif /* defined(UVM_PAGER_INLINE) || defined(UVM_PAGER) */
                     72:
                     73: #endif /* _UVM_UVM_PAGER_I_H_ */

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