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uvm_user.c revision 1.10.2.1
      1  1.10.2.1  thorpej /*	$NetBSD: uvm_user.c,v 1.10.2.1 2002/01/10 20:05:49 thorpej Exp $	*/
      2       1.1      mrg 
      3       1.1      mrg /*
      4       1.1      mrg  *
      5       1.1      mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      6       1.1      mrg  * All rights reserved.
      7       1.1      mrg  *
      8       1.1      mrg  * Redistribution and use in source and binary forms, with or without
      9       1.1      mrg  * modification, are permitted provided that the following conditions
     10       1.1      mrg  * are met:
     11       1.1      mrg  * 1. Redistributions of source code must retain the above copyright
     12       1.1      mrg  *    notice, this list of conditions and the following disclaimer.
     13       1.1      mrg  * 2. Redistributions in binary form must reproduce the above copyright
     14       1.1      mrg  *    notice, this list of conditions and the following disclaimer in the
     15       1.1      mrg  *    documentation and/or other materials provided with the distribution.
     16       1.1      mrg  * 3. All advertising materials mentioning features or use of this software
     17       1.1      mrg  *    must display the following acknowledgement:
     18       1.1      mrg  *      This product includes software developed by Charles D. Cranor and
     19       1.1      mrg  *      Washington University.
     20       1.1      mrg  * 4. The name of the author may not be used to endorse or promote products
     21       1.1      mrg  *    derived from this software without specific prior written permission.
     22       1.1      mrg  *
     23       1.1      mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24       1.1      mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25       1.1      mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26       1.1      mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27       1.1      mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28       1.1      mrg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29       1.1      mrg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30       1.1      mrg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31       1.1      mrg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32       1.1      mrg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33       1.3      mrg  *
     34       1.3      mrg  * from: Id: uvm_user.c,v 1.1.2.1 1997/08/14 19:10:41 chuck Exp
     35       1.1      mrg  */
     36       1.1      mrg 
     37       1.1      mrg /*
     38       1.1      mrg  * uvm_user.c: high level uvm_allocate/uvm_deallocate interface into vm.
     39       1.1      mrg  */
     40       1.1      mrg 
     41  1.10.2.1  thorpej #include <sys/cdefs.h>
     42  1.10.2.1  thorpej __KERNEL_RCSID(0, "$NetBSD: uvm_user.c,v 1.10.2.1 2002/01/10 20:05:49 thorpej Exp $");
     43       1.1      mrg 
     44       1.1      mrg #include <sys/param.h>
     45       1.1      mrg #include <sys/systm.h>
     46       1.1      mrg #include <sys/proc.h>
     47       1.1      mrg 
     48       1.1      mrg #include <uvm/uvm.h>
     49       1.1      mrg 
     50       1.1      mrg /*
     51       1.1      mrg  * uvm_deallocate: deallocate memory (unmap)
     52       1.1      mrg  */
     53       1.1      mrg 
     54       1.9      chs void
     55       1.4      mrg uvm_deallocate(map, start, size)
     56      1.10      chs 	struct vm_map *map;
     57       1.5      eeh 	vaddr_t start;
     58       1.5      eeh 	vsize_t size;
     59       1.4      mrg {
     60       1.1      mrg 
     61       1.9      chs 	if (size == 0)
     62       1.9      chs 		return;
     63       1.1      mrg 
     64       1.9      chs 	uvm_unmap(map, trunc_page(start), round_page(start + size));
     65       1.1      mrg }
     66