The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: uvm_device.h,v 1.10 2004/03/24 07:55:01 junyoung Exp $ */
    2 
    3 /*
    4  *
    5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Charles D. Cranor and
   19  *      Washington University.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
   35  */
   36 
   37 #ifndef _UVM_UVM_DEVICE_H_
   38 #define _UVM_UVM_DEVICE_H_
   39 
   40 /*
   41  * uvm_device.h
   42  *
   43  * device handle into the VM system.
   44  */
   45 
   46 /*
   47  * the uvm_device structure.   object is put at the top of the data structure.
   48  * this allows:
   49  *   (struct uvm_device *) == (struct uvm_object *)
   50  */
   51 
   52 struct uvm_device {
   53         struct uvm_object u_obj;        /* the actual VM object */
   54         int u_flags;                    /* flags [LOCKED BY UDV_LOCK!] */
   55         dev_t u_device;         /* our device */
   56         LIST_ENTRY(uvm_device) u_list; /* list of device objects */
   57 };
   58 
   59 /*
   60  * u_flags values
   61  */
   62 
   63 #define UVM_DEVICE_HOLD         0x1     /* someone has a "hold" on it */
   64 #define UVM_DEVICE_WANTED       0x2     /* someone wants to put a "hold" on */
   65 
   66 #ifdef _KERNEL
   67 
   68 /*
   69  * prototypes
   70  */
   71 
   72 struct uvm_object *udv_attach(void *, vm_prot_t, voff_t, vsize_t);
   73 
   74 #endif /* _KERNEL */
   75 
   76 #endif /* _UVM_UVM_DEVICE_H_ */

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