Annotation of sys/uvm/uvm_device.h, Revision 1.1
1.1 ! nbrk 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_ */
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