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Annotation of XNU/osfmk/mach/mach_ioctl.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /*
        !            26:  * HISTORY
        !            27:  * 
        !            28:  * Revision 1.1.1.1  1998/09/22 21:05:30  wsanchez
        !            29:  * Import of Mac OS X kernel (~semeria)
        !            30:  *
        !            31:  * Revision 1.1.1.1  1998/03/07 02:25:45  wsanchez
        !            32:  * Import of OSF Mach kernel (~mburg)
        !            33:  *
        !            34:  * Revision 1.1.4.2  1997/02/07  12:12:35  barbou
        !            35:  *     Fixed the defines (some were missing the "MACH_" prefixes).
        !            36:  *     [1997/02/07  12:06:38  barbou]
        !            37:  *
        !            38:  * Revision 1.1.4.1  1996/11/29  16:59:20  stephen
        !            39:  *     nmklinux_1.0b3_shared into pmk1.1
        !            40:  *          Contents of sys/ioctl.h. Prefixed the definitions with "MACH" to avoid
        !            41:  *          conflicts with UNIX servers.
        !            42:  *          [96/09/18            barbou]
        !            43:  *     [1996/11/29  16:33:15  stephen]
        !            44:  * 
        !            45:  * $EndLog$
        !            46:  */
        !            47: /*
        !            48:  * Mach Operating System
        !            49:  * Copyright (c) 1991 Carnegie Mellon University
        !            50:  * All Rights Reserved.
        !            51:  * 
        !            52:  * Permission to use, copy, modify and distribute this software and its
        !            53:  * documentation is hereby granted, provided that both the copyright
        !            54:  * notice and this permission notice appear in all copies of the
        !            55:  * software, derivative works or modified versions, and any portions
        !            56:  * thereof, and that both notices appear in supporting documentation.
        !            57:  *
        !            58:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            59:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            60:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            61:  *
        !            62:  * Carnegie Mellon requests users of this software to return to
        !            63:  *
        !            64: CS.CMU.EDU
        !            65: *  School of Computer Science
        !            66: *  Carnegie Mellon University
        !            67: *  Pittsburgh PA 15213-3890
        !            68: *
        !            69: * any improvements or extensions that they make and grant Carnegie Mellon rights
        !            70: * to redistribute these changes.
        !            71: */
        !            72: /*
        !            73:  */
        !            74: /*
        !            75:  * Format definitions for 'ioctl' commands in device definitions.
        !            76:  *
        !            77:  * From BSD4.4.
        !            78:  */
        !            79: 
        !            80: #ifndef _MACH_MACH_IOCTL_H_
        !            81: #define _MACH_MACH_IOCTL_H_
        !            82: 
        !            83: /*
        !            84:  * Ioctl's have the command encoded in the lower word, and the size of
        !            85:  * any in or out parameters in the upper word.  The high 3 bits of the
        !            86:  * upper word are used to encode the in/out status of the parameter.
        !            87:  */
        !            88: #define MACH_IOCPARM_MASK       0x1fff  /* parameter length, at most 13 bits */
        !            89: #define MACH_IOC_VOID   0x20000000      /* no parameters */
        !            90: #define MACH_IOC_OUT            0x40000000      /* copy out parameters */
        !            91: #define MACH_IOC_IN             0x80000000      /* copy in parameters */
        !            92: #define MACH_IOC_INOUT  (MACH_IOC_IN|MACH_IOC_OUT)
        !            93: 
        !            94: #define _MACH_IOC(inout,group,num,len) \
        !            95:         (inout | ((len & MACH_IOCPARM_MASK) << 16) | ((group) << 8) | (num))
        !            96: #define _MACH_IO(g,n)          _MACH_IOC(MACH_IOC_VOID,  (g), (n), 0)
        !            97: #define _MACH_IOR(g,n,t)        _MACH_IOC(MACH_IOC_OUT,   (g), (n), sizeof(t))
        !            98: #define _MACH_IOW(g,n,t)        _MACH_IOC(MACH_IOC_IN,    (g), (n), sizeof(t))
        !            99: #define _MACH_IOWR(g,n,t)       _MACH_IOC(MACH_IOC_INOUT, (g), (n), sizeof(t))
        !           100: 
        !           101: #ifdef  MACH_KERNEL
        !           102:      /*
        !           103:       * to avoid changing the references in the micro-kernel sources...
        !           104:       */
        !           105: #define IOCPARM_MASK    MACH_IOCPARM_MASK
        !           106: #define IOC_VOID        MACH_IOC_VOID
        !           107: #define IOC_OUT         MACH_IOC_OUT
        !           108: #define IOC_IN          MACH_IOC_IN
        !           109: #define IOC_INOUT       MACH_IOC_INOUT
        !           110: #define _IOC            _MACH_IOC
        !           111: #define _IO             _MACH_IO
        !           112: #define _IOR            _MACH_IOR
        !           113: #define _IOW            _MACH_IOW
        !           114: #define _IOWR           _MACH_IOWR
        !           115: #endif  /* MACH_KERNEL */
        !           116: 
        !           117: #endif   /* _MACH_MACH_IOCTL_H_ */

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