FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_map_i.h

     /*      $NetBSD: uvm_map_i.h,v 1.28 2004/02/10 01:30:49 matt 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.
     */
    
    /*
     * uvm_map_i.h
     */
    
    /*
     * inline functions [maybe]
     */
    
    #if defined(UVM_MAP_INLINE) || defined(UVM_MAP)
    
    #ifndef _UVM_UVM_MAP_I_H_
    #define _UVM_UVM_MAP_I_H_
    
    /*
     * uvm_map_create: create map
     */
    
    MAP_INLINE struct vm_map *
    uvm_map_create(pmap_t pmap, vaddr_t min, vaddr_t max, int flags)
    {
            struct vm_map *result;
    
            MALLOC(result, struct vm_map *, 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(struct vm_map *map, vaddr_t min, vaddr_t max, int flags)
   {
   
           RB_INIT(&map->rbhead);
           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);
   }
   
   
   /*
    *   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 void
   uvm_unmap(struct vm_map *map, vaddr_t start, vaddr_t end)
   {
           struct vm_map_entry *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);
           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);
   }
   
   
   /*
    * uvm_map_reference: add reference to a map
    *
    * => map need not be locked (we use ref_lock).
    */
   
   MAP_INLINE void
   uvm_map_reference(struct vm_map *map)
   {
           simple_lock(&map->ref_lock);
           map->ref_count++;
           simple_unlock(&map->ref_lock);
   }
   #endif /* _UVM_UVM_MAP_I_H_ */
   
   #endif /* defined(UVM_MAP_INLINE) || defined(UVM_MAP) */

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