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/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* The Mach Operating System project at Carnegie-Mellon University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)vm_user.c 8.2 (Berkeley) 1/12/94
*
*
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
* All rights reserved.
*
* Authors: Avadis Tevanian, Jr., Michael Wayne Young
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_user.c,v 1.8 1995/02/20 18:08:18 davidg Exp $
*/
/*
* User-exported virtual memory functions.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <vm/vm.h>
simple_lock_data_t vm_alloc_lock; /* XXX */
/*
* Similar to vm_allocate but assigns an explicit pager.
*/
int
vm_allocate_with_pager(map, addr, size, anywhere, pager, poffset, internal)
register vm_map_t map;
register vm_offset_t *addr;
register vm_size_t size;
boolean_t anywhere;
vm_pager_t pager;
vm_offset_t poffset;
boolean_t internal;
{
register vm_object_t object;
register int result;
if (map == NULL)
return (KERN_INVALID_ARGUMENT);
*addr = trunc_page(*addr);
size = round_page(size);
/*
* Lookup the pager/paging-space in the object cache. If it's not
* there, then create a new object and cache it.
*/
object = vm_object_lookup(pager);
if (object == NULL) {
object = vm_object_allocate(size);
/*
* From Mike Hibler: "unnamed anonymous objects should never
* be on the hash list ... For now you can just change
* vm_allocate_with_pager to not do vm_object_enter if this is
* an internal object ..."
*/
if (!internal)
vm_object_enter(object, pager);
}
if (internal)
object->flags |= OBJ_INTERNAL;
else {
object->flags &= ~OBJ_INTERNAL;
cnt.v_nzfod -= atop(size);
}
result = vm_map_find(map, object, poffset, addr, size, anywhere);
if (result != KERN_SUCCESS)
vm_object_deallocate(object);
else if (pager != NULL)
vm_object_setpager(object, pager, (vm_offset_t) 0, TRUE);
return (result);
}
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