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