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/* $OpenBSD: uvm_map_i.h,v 1.8 2001/08/11 10:57:22 art Exp $ */
/* $NetBSD: uvm_map_i.h,v 1.17 2000/05/08 22:59:35 thorpej Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* 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 Charles D. Cranor,
* Washington University, 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.
*
* @(#)vm_map.c 8.3 (Berkeley) 1/12/94
* from: Id: uvm_map_i.h,v 1.1.2.1 1997/08/14 19:10:50 chuck Exp
*
*
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
* All rights reserved.
*
* 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.
*/
#ifndef _UVM_UVM_MAP_I_H_
#define _UVM_UVM_MAP_I_H_
/*
* uvm_map_i.h
*/
/*
* inline functions [maybe]
*/
#if defined(UVM_MAP_INLINE) || defined(UVM_MAP)
/*
* uvm_map_create: create map
*/
MAP_INLINE vm_map_t
uvm_map_create(pmap, min, max, flags)
pmap_t pmap;
vaddr_t min, max;
int flags;
{
vm_map_t result;
MALLOC(result, vm_map_t,
(flags & VM_MAP_INTRSAFE) ? sizeof(struct vm_map_intrsafe) :
sizeof(struct vm_map),
M_VMMAP, M_WAITOK);
uvm_map_setup(result, min, max, flags);
result->pmap = pmap;
return(result);
}
/*
* uvm_map_setup: init map
*
* => map must not be in service yet.
*/
MAP_INLINE void
uvm_map_setup(map, min, max, flags)
vm_map_t map;
vaddr_t min, max;
int flags;
{
map->header.next = map->header.prev = &map->header;
map->nentries = 0;
map->size = 0;
map->ref_count = 1;
map->min_offset = min;
map->max_offset = max;
map->flags = flags;
map->first_free = &map->header;
map->hint = &map->header;
map->timestamp = 0;
lockinit(&map->lock, PVM, "vmmaplk", 0, 0);
simple_lock_init(&map->ref_lock);
simple_lock_init(&map->hint_lock);
simple_lock_init(&map->flags_lock);
/*
* If the map is interrupt safe, place it on the list
* of interrupt safe maps, for uvm_fault().
*
* We almost never set up an interrupt-safe map, but we set
* up quite a few regular ones (at every fork!), so put
* interrupt-safe map setup in the slow path.
*/
if (__predict_false(flags & VM_MAP_INTRSAFE)) {
struct vm_map_intrsafe *vmi = (struct vm_map_intrsafe *)map;
int s;
s = vmi_list_lock();
LIST_INSERT_HEAD(&vmi_list, vmi, vmi_list);
vmi_list_unlock(s);
}
}
/*
* U N M A P - m a i n e n t r y p o i n t
*/
/*
* uvm_unmap: remove mappings from a vm_map (from "start" up to "stop")
*
* => caller must check alignment and size
* => map must be unlocked (we will lock it)
*/
MAP_INLINE int
uvm_unmap(map, start, end)
vm_map_t map;
vaddr_t start,end;
{
int result;
vm_map_entry_t dead_entries;
UVMHIST_FUNC("uvm_unmap"); UVMHIST_CALLED(maphist);
UVMHIST_LOG(maphist, " (map=0x%x, start=0x%x, end=0x%x)",
map, start, end, 0);
/*
* work now done by helper functions. wipe the pmap's and then
* detach from the dead entries...
*/
vm_map_lock(map);
result = uvm_unmap_remove(map, start, end, &dead_entries);
vm_map_unlock(map);
if (dead_entries != NULL)
uvm_unmap_detach(dead_entries, 0);
UVMHIST_LOG(maphist, "<- done", 0,0,0,0);
return(result);
}
/*
* uvm_map_reference: add reference to a map
*
* => map need not be locked (we use ref_lock).
*/
MAP_INLINE void
uvm_map_reference(map)
vm_map_t map;
{
if (__predict_false(map == NULL)) {
#ifdef DIAGNOSTIC
printf("uvm_map_reference: reference to NULL map\n");
#ifdef DDB
Debugger();
#endif
#endif
return;
}
simple_lock(&map->ref_lock);
map->ref_count++;
simple_unlock(&map->ref_lock);
}
/*
* uvm_map_deallocate: drop reference to a map
*
* => caller must not lock map
* => we will zap map if ref count goes to zero
*/
MAP_INLINE void
uvm_map_deallocate(map)
vm_map_t map;
{
int c;
if (__predict_false(map == NULL)) {
#ifdef DIAGNOSTIC
printf("uvm_map_deallocate: reference to NULL map\n");
#ifdef DDB
Debugger();
#endif
#endif
return;
}
simple_lock(&map->ref_lock);
c = --map->ref_count;
simple_unlock(&map->ref_lock);
if (c > 0) {
return;
}
/*
* all references gone. unmap and free.
*/
uvm_unmap(map, map->min_offset, map->max_offset);
pmap_destroy(map->pmap);
FREE(map, M_VMMAP);
}
#endif /* defined(UVM_MAP_INLINE) || defined(UVM_MAP) */
#endif /* _UVM_UVM_MAP_I_H_ */
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