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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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