The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/io_port.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon 
   24  * the rights to redistribute these changes.
   25  */
   26 
   27 /*
   28  * HISTORY
   29  * $Log:        io_port.h,v $
   30  * Revision 2.2  92/01/03  20:07:05  dbg
   31  *      Created.
   32  *      [91/11/07            dbg]
   33  * 
   34  */
   35 
   36 #ifndef _I386_IO_PORT_H_
   37 #define _I386_IO_PORT_H_
   38 /*
   39  * IO register definitions.
   40  */
   41 typedef unsigned short  io_reg_t;
   42 
   43 #define IO_REG_NULL     (0x00ff)        /* reserved */
   44 
   45 /*
   46  * Allocate and destroy io port sets for users to map into
   47  * threads.
   48  */
   49 extern void     io_port_create(/* device_t, io_reg_t * */);
   50 extern void     io_port_destroy(/* device_t */);
   51 
   52 #endif  /* _I386_IO_PORT_H_ */

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