Line data    Source code

       1             : /*      $OpenBSD: uvm_user.c,v 1.14 2014/09/14 14:17:27 jsg Exp $       */
       2             : /*      $NetBSD: uvm_user.c,v 1.8 2000/06/27 17:29:37 mrg Exp $ */
       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             :  *
      17             :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      18             :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      19             :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      20             :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      21             :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      22             :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      23             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      24             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      25             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      26             :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      27             :  *
      28             :  * from: Id: uvm_user.c,v 1.1.2.1 1997/08/14 19:10:41 chuck Exp
      29             :  */
      30             : 
      31             : /*
      32             :  * uvm_user.c: high level uvm_allocate/uvm_deallocate interface into vm.
      33             :  */
      34             : 
      35             : 
      36             : #include <sys/param.h>
      37             : #include <sys/systm.h>
      38             : 
      39             : #include <uvm/uvm.h>
      40             : 
      41             : /*
      42             :  * uvm_deallocate: deallocate memory (unmap)
      43             :  */
      44             : void
      45           0 : uvm_deallocate(struct vm_map *map, vaddr_t start, vsize_t size)
      46             : {
      47             : 
      48           0 :         if (map == NULL)
      49           0 :                 panic("uvm_deallocate with null map");
      50             : 
      51           0 :         if (size == 0)
      52             :                 return;
      53             : 
      54           0 :         uvm_unmap(map, trunc_page(start), round_page(start+size));
      55           0 : }