1 /* $OpenBSD: uvm_device.h,v 1.8 2002/03/14 01:27:18 millert Exp $ */ 2 /* $NetBSD: uvm_device.h,v 1.9 2000/05/28 10:21:55 drochner Exp $ */ 3 4 /* 5 * 6 * Copyright (c) 1997 Charles D. Cranor and Washington University. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Charles D. Cranor and 20 * Washington University. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp 36 */ 37 38 #ifndef _UVM_UVM_DEVICE_H_ 39 #define _UVM_UVM_DEVICE_H_ 40 41 /* 42 * uvm_device.h 43 * 44 * device handle into the VM system. 45 */ 46 47 /* 48 * the uvm_device structure. object is put at the top of the data structure. 49 * this allows: 50 * (struct uvm_device *) == (struct uvm_object *) 51 */ 52 53 struct uvm_device { 54 struct uvm_object u_obj; /* the actual VM object */ 55 int u_flags; /* flags [LOCKED BY UDV_LOCK!] */ 56 dev_t u_device; /* our device */ 57 LIST_ENTRY(uvm_device) u_list; /* list of device objects */ 58 }; 59 60 /* 61 * u_flags values 62 */ 63 64 #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */ 65 #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */ 66 67 #ifdef _KERNEL 68 69 /* 70 * prototypes 71 */ 72 73 struct uvm_object *udv_attach(void *, vm_prot_t, voff_t, vsize_t); 74 75 #endif /* _KERNEL */ 76 77 #endif /* _UVM_UVM_DEVICE_H_ */ 78