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uvm_device.h revision 1.1 
      1  1.1  mrg /*	$Id: uvm_device.h,v 1.1 1998/02/05 06:25:10 mrg Exp $	*/
      2  1.1  mrg 
      3  1.1  mrg /*
      4  1.1  mrg  * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
      5  1.1  mrg  *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
      6  1.1  mrg  */
      7  1.1  mrg /*
      8  1.1  mrg  *
      9  1.1  mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
     10  1.1  mrg  * All rights reserved.
     11  1.1  mrg  *
     12  1.1  mrg  * Redistribution and use in source and binary forms, with or without
     13  1.1  mrg  * modification, are permitted provided that the following conditions
     14  1.1  mrg  * are met:
     15  1.1  mrg  * 1. Redistributions of source code must retain the above copyright
     16  1.1  mrg  *    notice, this list of conditions and the following disclaimer.
     17  1.1  mrg  * 2. Redistributions in binary form must reproduce the above copyright
     18  1.1  mrg  *    notice, this list of conditions and the following disclaimer in the
     19  1.1  mrg  *    documentation and/or other materials provided with the distribution.
     20  1.1  mrg  * 3. All advertising materials mentioning features or use of this software
     21  1.1  mrg  *    must display the following acknowledgement:
     22  1.1  mrg  *      This product includes software developed by Charles D. Cranor and
     23  1.1  mrg  *      Washington University.
     24  1.1  mrg  * 4. The name of the author may not be used to endorse or promote products
     25  1.1  mrg  *    derived from this software without specific prior written permission.
     26  1.1  mrg  *
     27  1.1  mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     28  1.1  mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     29  1.1  mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     30  1.1  mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     31  1.1  mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     32  1.1  mrg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     33  1.1  mrg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     34  1.1  mrg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     35  1.1  mrg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     36  1.1  mrg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     37  1.1  mrg  */
     38  1.1  mrg 
     39  1.1  mrg /*
     40  1.1  mrg  * uvm_device.h
     41  1.1  mrg  *
     42  1.1  mrg  * device handle into the VM system.
     43  1.1  mrg  */
     44  1.1  mrg 
     45  1.1  mrg #ifndef UVM_UVM_DEVICE_H
     46  1.1  mrg #define UVM_UVM_DEVICE_H
     47  1.1  mrg 
     48  1.1  mrg /*
     49  1.1  mrg  * the uvm_device structure.   object is put at the top of the data structure.
     50  1.1  mrg  * this allows:
     51  1.1  mrg  *   (struct uvm_device *) == (struct uvm_object *)
     52  1.1  mrg  */
     53  1.1  mrg 
     54  1.1  mrg struct uvm_device {
     55  1.1  mrg   struct uvm_object u_obj;	/* the actual VM object */
     56  1.1  mrg   int u_flags;			/* flags [LOCKED BY UDV_LOCK!] */
     57  1.1  mrg   dev_t u_device;		/* our device */
     58  1.1  mrg   LIST_ENTRY(uvm_device) u_list; /* list of device objects */
     59  1.1  mrg };
     60  1.1  mrg 
     61  1.1  mrg /*
     62  1.1  mrg  * u_flags values
     63  1.1  mrg  */
     64  1.1  mrg 
     65  1.1  mrg #define UVM_DEVICE_HOLD		0x1	/* someone has a "hold" on it */
     66  1.1  mrg #define UVM_DEVICE_WANTED	0x2	/* someone wants to put a "hold" on */
     67  1.1  mrg 
     68  1.1  mrg /*
     69  1.1  mrg  * prototypes
     70  1.1  mrg  */
     71  1.1  mrg 
     72  1.1  mrg struct uvm_object *udv_attach __P((void *, vm_prot_t));
     73  1.1  mrg 
     74  1.1  mrg #endif UVM_UVM_DEVICE_H
     75