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