1 | /* $NetBSD: uvm_device.h,v 1.13 2014/12/14 23:48:58 chs 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 | /* |
40 | * the uvm_device structure. object is put at the top of the data structure. |
41 | * this allows: |
42 | * (struct uvm_device *) == (struct uvm_object *) |
43 | */ |
44 | |
45 | struct uvm_device { |
46 | struct uvm_object u_obj; /* the actual VM object */ |
47 | int u_flags; /* flags [LOCKED BY UDV_LOCK!] */ |
48 | dev_t u_device; /* our device */ |
49 | LIST_ENTRY(uvm_device) u_list; /* list of device objects */ |
50 | }; |
51 | |
52 | /* |
53 | * u_flags values |
54 | */ |
55 | |
56 | #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */ |
57 | #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */ |
58 | |
59 | #ifdef _KERNEL |
60 | |
61 | /* |
62 | * prototypes |
63 | */ |
64 | |
65 | struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t); |
66 | |
67 | #endif /* _KERNEL */ |
68 | |
69 | #endif /* _UVM_UVM_DEVICE_H_ */ |
70 | |