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uvm_device.h revision 1.4 
      1 /*	$NetBSD: uvm_device.h,v 1.4 1998/02/10 02:34:29 perry Exp $	*/
      2 
      3 /*
      4  * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
      5  *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
      6  */
      7 /*
      8  *
      9  * Copyright (c) 1997 Charles D. Cranor and Washington University.
     10  * All rights reserved.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *      This product includes software developed by Charles D. Cranor and
     23  *      Washington University.
     24  * 4. The name of the author may not be used to endorse or promote products
     25  *    derived from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     28  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     29  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     30  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     31  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     32  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     33  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     34  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     36  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     37  *
     38  * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
     39  */
     40 
     41 #ifndef _UVM_UVM_DEVICE_H_
     42 #define _UVM_UVM_DEVICE_H_
     43 
     44 /*
     45  * uvm_device.h
     46  *
     47  * device handle into the VM system.
     48  */
     49 
     50 /*
     51  * the uvm_device structure.   object is put at the top of the data structure.
     52  * this allows:
     53  *   (struct uvm_device *) == (struct uvm_object *)
     54  */
     55 
     56 struct uvm_device {
     57   struct uvm_object u_obj;	/* the actual VM object */
     58   int u_flags;			/* flags [LOCKED BY UDV_LOCK!] */
     59   dev_t u_device;		/* our device */
     60   LIST_ENTRY(uvm_device) u_list; /* list of device objects */
     61 };
     62 
     63 /*
     64  * u_flags values
     65  */
     66 
     67 #define UVM_DEVICE_HOLD		0x1	/* someone has a "hold" on it */
     68 #define UVM_DEVICE_WANTED	0x2	/* someone wants to put a "hold" on */
     69 
     70 /*
     71  * prototypes
     72  */
     73 
     74 struct uvm_object *udv_attach __P((void *, vm_prot_t));
     75 
     76 #endif /* _UVM_UVM_DEVICE_H_ */
     77