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uvm_device.h revision 1.9.8.1
      1  1.9.8.1   thorpej /*	$NetBSD: uvm_device.h,v 1.9.8.1 2001/09/07 04:45:46 thorpej Exp $	*/
      2      1.1       mrg 
      3      1.1       mrg /*
      4      1.1       mrg  *
      5      1.1       mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      6      1.1       mrg  * All rights reserved.
      7      1.1       mrg  *
      8      1.1       mrg  * Redistribution and use in source and binary forms, with or without
      9      1.1       mrg  * modification, are permitted provided that the following conditions
     10      1.1       mrg  * are met:
     11      1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     12      1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     13      1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     14      1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     15      1.1       mrg  *    documentation and/or other materials provided with the distribution.
     16      1.1       mrg  * 3. All advertising materials mentioning features or use of this software
     17      1.1       mrg  *    must display the following acknowledgement:
     18      1.1       mrg  *      This product includes software developed by Charles D. Cranor and
     19      1.1       mrg  *      Washington University.
     20      1.1       mrg  * 4. The name of the author may not be used to endorse or promote products
     21      1.1       mrg  *    derived from this software without specific prior written permission.
     22      1.1       mrg  *
     23      1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24      1.1       mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25      1.1       mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26      1.1       mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27      1.1       mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28      1.1       mrg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29      1.1       mrg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30      1.1       mrg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31      1.1       mrg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32      1.1       mrg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33      1.3       mrg  *
     34      1.3       mrg  * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
     35      1.1       mrg  */
     36      1.1       mrg 
     37      1.4     perry #ifndef _UVM_UVM_DEVICE_H_
     38      1.4     perry #define _UVM_UVM_DEVICE_H_
     39      1.4     perry 
     40      1.1       mrg /*
     41      1.1       mrg  * uvm_device.h
     42      1.1       mrg  *
     43      1.1       mrg  * device handle into the VM system.
     44      1.1       mrg  */
     45      1.1       mrg 
     46      1.1       mrg /*
     47      1.1       mrg  * the uvm_device structure.   object is put at the top of the data structure.
     48      1.1       mrg  * this allows:
     49      1.1       mrg  *   (struct uvm_device *) == (struct uvm_object *)
     50      1.1       mrg  */
     51      1.1       mrg 
     52      1.1       mrg struct uvm_device {
     53      1.5       mrg 	struct uvm_object u_obj;	/* the actual VM object */
     54      1.5       mrg 	int u_flags;			/* flags [LOCKED BY UDV_LOCK!] */
     55  1.9.8.1   thorpej 	struct vnode *u_devvp;		/* our device */
     56      1.5       mrg 	LIST_ENTRY(uvm_device) u_list; /* list of device objects */
     57      1.1       mrg };
     58      1.1       mrg 
     59      1.1       mrg /*
     60      1.1       mrg  * u_flags values
     61      1.1       mrg  */
     62      1.1       mrg 
     63      1.1       mrg #define UVM_DEVICE_HOLD		0x1	/* someone has a "hold" on it */
     64      1.1       mrg #define UVM_DEVICE_WANTED	0x2	/* someone wants to put a "hold" on */
     65      1.1       mrg 
     66      1.8   thorpej #ifdef _KERNEL
     67      1.8   thorpej 
     68      1.1       mrg /*
     69      1.1       mrg  * prototypes
     70      1.1       mrg  */
     71      1.1       mrg 
     72      1.9  drochner struct uvm_object *udv_attach __P((void *, vm_prot_t, voff_t, vsize_t));
     73      1.8   thorpej 
     74      1.8   thorpej #endif /* _KERNEL */
     75      1.1       mrg 
     76      1.4     perry #endif /* _UVM_UVM_DEVICE_H_ */
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