| 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 | |