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Annotation of sys/uvm/uvm_device.h, Revision 1.1.1.1

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_ */