Home | History | Annotate | Line # | Download | only in uvm
uvm_device.h revision 1.13 
      1  1.13      chs /*	$NetBSD: uvm_device.h,v 1.13 2014/12/14 23:48:58 chs Exp $	*/
      2   1.1      mrg 
      3   1.1      mrg /*
      4   1.1      mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      5   1.1      mrg  * All rights reserved.
      6   1.1      mrg  *
      7   1.1      mrg  * Redistribution and use in source and binary forms, with or without
      8   1.1      mrg  * modification, are permitted provided that the following conditions
      9   1.1      mrg  * are met:
     10   1.1      mrg  * 1. Redistributions of source code must retain the above copyright
     11   1.1      mrg  *    notice, this list of conditions and the following disclaimer.
     12   1.1      mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1      mrg  *    notice, this list of conditions and the following disclaimer in the
     14   1.1      mrg  *    documentation and/or other materials provided with the distribution.
     15   1.1      mrg  *
     16   1.1      mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17   1.1      mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18   1.1      mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19   1.1      mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20   1.1      mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21   1.1      mrg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22   1.1      mrg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23   1.1      mrg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24   1.1      mrg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25   1.1      mrg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26   1.3      mrg  *
     27   1.3      mrg  * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
     28   1.1      mrg  */
     29   1.1      mrg 
     30   1.4    perry #ifndef _UVM_UVM_DEVICE_H_
     31   1.4    perry #define _UVM_UVM_DEVICE_H_
     32   1.4    perry 
     33   1.1      mrg /*
     34   1.1      mrg  * uvm_device.h
     35   1.1      mrg  *
     36   1.1      mrg  * device handle into the VM system.
     37   1.1      mrg  */
     38   1.1      mrg 
     39   1.1      mrg /*
     40   1.1      mrg  * the uvm_device structure.   object is put at the top of the data structure.
     41   1.1      mrg  * this allows:
     42   1.1      mrg  *   (struct uvm_device *) == (struct uvm_object *)
     43   1.1      mrg  */
     44   1.1      mrg 
     45   1.1      mrg struct uvm_device {
     46   1.5      mrg 	struct uvm_object u_obj;	/* the actual VM object */
     47   1.5      mrg 	int u_flags;			/* flags [LOCKED BY UDV_LOCK!] */
     48   1.5      mrg 	dev_t u_device;		/* our device */
     49   1.5      mrg 	LIST_ENTRY(uvm_device) u_list; /* list of device objects */
     50   1.1      mrg };
     51   1.1      mrg 
     52   1.1      mrg /*
     53   1.1      mrg  * u_flags values
     54   1.1      mrg  */
     55   1.1      mrg 
     56   1.1      mrg #define UVM_DEVICE_HOLD		0x1	/* someone has a "hold" on it */
     57   1.1      mrg #define UVM_DEVICE_WANTED	0x2	/* someone wants to put a "hold" on */
     58   1.1      mrg 
     59   1.8  thorpej #ifdef _KERNEL
     60   1.8  thorpej 
     61   1.1      mrg /*
     62   1.1      mrg  * prototypes
     63   1.1      mrg  */
     64   1.1      mrg 
     65  1.13      chs struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t);
     66   1.8  thorpej 
     67   1.8  thorpej #endif /* _KERNEL */
     68   1.1      mrg 
     69   1.4    perry #endif /* _UVM_UVM_DEVICE_H_ */
     70