248 lines
6.6 KiB
C
248 lines
6.6 KiB
C
/* $NetBSD: uvm_map_i.h,v 1.7 1998/08/13 02:11:02 eeh Exp $ */
|
|
|
|
/*
|
|
* XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
|
|
* >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
|
|
*/
|
|
/*
|
|
* 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_
|
|
|
|
#include "opt_uvmhist.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, pageable)
|
|
pmap_t pmap;
|
|
vaddr_t min, max;
|
|
boolean_t pageable;
|
|
{
|
|
vm_map_t result;
|
|
|
|
MALLOC(result, vm_map_t, sizeof(struct vm_map), M_VMMAP, M_WAITOK);
|
|
uvm_map_setup(result, min, max, pageable);
|
|
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, pageable)
|
|
vm_map_t map;
|
|
vaddr_t min, max;
|
|
boolean_t pageable;
|
|
{
|
|
|
|
map->header.next = map->header.prev = &map->header;
|
|
map->nentries = 0;
|
|
map->size = 0;
|
|
map->ref_count = 1;
|
|
map->is_main_map = TRUE;
|
|
map->min_offset = min;
|
|
map->max_offset = max;
|
|
map->entries_pageable = pageable;
|
|
map->first_free = &map->header;
|
|
map->hint = &map->header;
|
|
map->timestamp = 0;
|
|
lockinit(&map->lock, PVM, "thrd_sleep", 0, 0);
|
|
simple_lock_init(&map->ref_lock);
|
|
simple_lock_init(&map->hint_lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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)
|
|
* => if the "start"/"stop" range lie within a mapping of a share map,
|
|
* then the unmap takes place within the context of that share map
|
|
* rather than in the main map, unless the "mainonly" flag is set.
|
|
* (e.g. the "exit" system call would want to set "mainonly").
|
|
*/
|
|
|
|
MAP_INLINE int
|
|
uvm_unmap(map, start, end, mainonly)
|
|
vm_map_t map;
|
|
vaddr_t start,end;
|
|
boolean_t mainonly;
|
|
{
|
|
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, mainonly=%d)",
|
|
map, start, end, mainonly);
|
|
/*
|
|
* 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, mainonly, &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 (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 (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, TRUE);
|
|
pmap_destroy(map->pmap);
|
|
|
|
FREE(map, M_VMMAP);
|
|
}
|
|
|
|
#endif /* defined(UVM_MAP_INLINE) || defined(UVM_MAP) */
|
|
|
|
#endif /* _UVM_UVM_MAP_I_H_ */
|