1 /* $OpenBSD: uvm_device.h,v 1.11 2014/07/11 16:35:40 jsg Exp $ */ 2 /* $NetBSD: uvm_device.h,v 1.9 2000/05/28 10:21:55 drochner Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp 29 */ 30 31 #ifndef _UVM_UVM_DEVICE_H_ 32 #define _UVM_UVM_DEVICE_H_ 33 34 /* 35 * uvm_device.h 36 * 37 * device handle into the VM system. 38 */ 39 40 /* 41 * the uvm_device structure. object is put at the top of the data structure. 42 * this allows: 43 * (struct uvm_device *) == (struct uvm_object *) 44 */ 45 46 struct uvm_device { 47 struct uvm_object u_obj; /* the actual VM object */ 48 int u_flags; /* flags [LOCKED BY UDV_LOCK!] */ 49 dev_t u_device; /* our device */ 50 LIST_ENTRY(uvm_device) u_list; /* list of device objects */ 51 }; 52 53 /* 54 * u_flags values 55 */ 56 57 #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */ 58 #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */ 59 60 #ifdef _KERNEL 61 62 /* 63 * prototypes 64 */ 65 66 struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t); 67 struct uvm_object *udv_attach_drm(dev_t, vm_prot_t, voff_t, vsize_t); 68 69 #endif /* _KERNEL */ 70 71 #endif /* _UVM_UVM_DEVICE_H_ */ 72