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Annotation of sys/uvm/uvm_user.c, Revision 1.1.1.1

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: }