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