Annotation of sys/uvm/uvm_device.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: uvm_device.h,v 1.8 2002/03/14 01:27:18 millert Exp $ */
2: /* $NetBSD: uvm_device.h,v 1.9 2000/05/28 10:21:55 drochner Exp $ */
3:
4: /*
5: *
6: * Copyright (c) 1997 Charles D. Cranor and Washington University.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by Charles D. Cranor and
20: * Washington University.
21: * 4. The name of the author may not be used to endorse or promote products
22: * derived from this software without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34: *
35: * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
36: */
37:
38: #ifndef _UVM_UVM_DEVICE_H_
39: #define _UVM_UVM_DEVICE_H_
40:
41: /*
42: * uvm_device.h
43: *
44: * device handle into the VM system.
45: */
46:
47: /*
48: * the uvm_device structure. object is put at the top of the data structure.
49: * this allows:
50: * (struct uvm_device *) == (struct uvm_object *)
51: */
52:
53: struct uvm_device {
54: struct uvm_object u_obj; /* the actual VM object */
55: int u_flags; /* flags [LOCKED BY UDV_LOCK!] */
56: dev_t u_device; /* our device */
57: LIST_ENTRY(uvm_device) u_list; /* list of device objects */
58: };
59:
60: /*
61: * u_flags values
62: */
63:
64: #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */
65: #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */
66:
67: #ifdef _KERNEL
68:
69: /*
70: * prototypes
71: */
72:
73: struct uvm_object *udv_attach(void *, vm_prot_t, voff_t, vsize_t);
74:
75: #endif /* _KERNEL */
76:
77: #endif /* _UVM_UVM_DEVICE_H_ */
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