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uvm_device.h revision 1.14 
      1 /*	$NetBSD: uvm_device.h,v 1.14 2020/09/05 16:30:13 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  *
     27  * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
     28  */
     29 
     30 #ifndef _UVM_UVM_DEVICE_H_
     31 #define _UVM_UVM_DEVICE_H_
     32 
     33 /*
     34  * uvm_device.h
     35  *
     36  * device handle into the VM system.
     37  */
     38 
     39 #include <sys/types.h>
     40 
     41 #include <sys/queue.h>
     42 
     43 #include <uvm/uvm_object.h>
     44 
     45 /*
     46  * the uvm_device structure.   object is put at the top of the data structure.
     47  * this allows:
     48  *   (struct uvm_device *) == (struct uvm_object *)
     49  */
     50 
     51 struct uvm_device {
     52 	struct uvm_object u_obj;	/* the actual VM object */
     53 	int u_flags;			/* flags [LOCKED BY UDV_LOCK!] */
     54 	dev_t u_device;		/* our device */
     55 	LIST_ENTRY(uvm_device) u_list; /* list of device objects */
     56 };
     57 
     58 /*
     59  * u_flags values
     60  */
     61 
     62 #define UVM_DEVICE_HOLD		0x1	/* someone has a "hold" on it */
     63 #define UVM_DEVICE_WANTED	0x2	/* someone wants to put a "hold" on */
     64 
     65 #ifdef _KERNEL
     66 
     67 #include <uvm/uvm_param.h>
     68 #include <uvm/uvm_prot.h>
     69 
     70 /*
     71  * prototypes
     72  */
     73 
     74 struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t);
     75 
     76 #endif /* _KERNEL */
     77 
     78 #endif /* _UVM_UVM_DEVICE_H_ */
     79