io_emulate.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_emulate.h,v $
   30  * Revision 2.2  92/01/03  20:06:59  dbg
   31  *      Created.
   32  *      [91/12/06            dbg]
   33  * 
   34  */
   35 
   36 #ifndef _I386_IO_EMULATE_H_
   37 #define _I386_IO_EMULATE_H_
   38 
   39 /*
   40  * Return codes from IO emulation.
   41  */
   42 extern int      emulate_io(/*
   43                         struct i386_saved_state *regs,
   44                         int     opcode,
   45                         int     io_port
   46                            */);
   47 
   48 #define EM_IO_DONE      0       /* IO instruction executed, proceed */
   49 #define EM_IO_RETRY     1       /* IO port mapped, retry instruction */
   50 #define EM_IO_ERROR     2       /* IO port not mapped */
   51 
   52 #endif  /* _I386_IO_EMULATE_H_ */

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

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