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Annotation of sys/uvm/uvm_pager_i.h, Revision 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_ */