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Annotation of sys/uvm/uvm_user.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: uvm_user.c,v 1.11 2007/04/27 17:01:54 art Exp $       */
        !             2: /*     $NetBSD: uvm_user.c,v 1.8 2000/06/27 17:29:37 mrg 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_user.c,v 1.1.2.1 1997/08/14 19:10:41 chuck Exp
        !            36:  */
        !            37:
        !            38: /*
        !            39:  * uvm_user.c: high level uvm_allocate/uvm_deallocate interface into vm.
        !            40:  */
        !            41:
        !            42:
        !            43: #include <sys/param.h>
        !            44: #include <sys/systm.h>
        !            45: #include <sys/proc.h>
        !            46:
        !            47: #include <uvm/uvm.h>
        !            48:
        !            49: /*
        !            50:  * uvm_deallocate: deallocate memory (unmap)
        !            51:  */
        !            52:
        !            53: void
        !            54: uvm_deallocate(struct vm_map *map, vaddr_t start, vsize_t size)
        !            55: {
        !            56:
        !            57:        if (map == NULL)
        !            58:                panic("uvm_deallocate with null map");
        !            59:
        !            60:        if (size == 0)
        !            61:                return;
        !            62:
        !            63:        uvm_unmap(map, trunc_page(start), round_page(start+size));
        !            64: }