/* $NetBSD: uvm_device.h,v 1.13 2014/12/14 23:48:58 chs Exp $ */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp */ #ifndef _UVM_UVM_DEVICE_H_ #define _UVM_UVM_DEVICE_H_ /* * uvm_device.h * * device handle into the VM system. */ /* * the uvm_device structure. object is put at the top of the data structure. * this allows: * (struct uvm_device *) == (struct uvm_object *) */ struct uvm_device { struct uvm_object u_obj; /* the actual VM object */ int u_flags; /* flags [LOCKED BY UDV_LOCK!] */ dev_t u_device; /* our device */ LIST_ENTRY(uvm_device) u_list; /* list of device objects */ }; /* * u_flags values */ #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */ #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */ #ifdef _KERNEL /* * prototypes */ struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t); #endif /* _KERNEL */ #endif /* _UVM_UVM_DEVICE_H_ */