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uvm_user.c revision 1.9 
      1 /*	$NetBSD: uvm_user.c,v 1.9 2001/03/15 06:10:58 chs Exp $	*/
      2 
      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  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Charles D. Cranor and
     19  *      Washington University.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  *
     34  * from: Id: uvm_user.c,v 1.1.2.1 1997/08/14 19:10:41 chuck Exp
     35  */
     36 
     37 /*
     38  * uvm_user.c: high level uvm_allocate/uvm_deallocate interface into vm.
     39  */
     40 
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/proc.h>
     45 
     46 #include <uvm/uvm.h>
     47 
     48 /*
     49  * uvm_deallocate: deallocate memory (unmap)
     50  */
     51 
     52 void
     53 uvm_deallocate(map, start, size)
     54 	vm_map_t map;
     55 	vaddr_t start;
     56 	vsize_t size;
     57 {
     58 
     59 	if (size == 0)
     60 		return;
     61 
     62 	uvm_unmap(map, trunc_page(start), round_page(start + size));
     63 }
     64