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15637ed4 RG |
1 | /* |
2 | * Mach Operating System | |
3 | * Copyright (c) 1991,1990,1989 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 | * HISTORY | |
28 | * $Log: eflags.h,v $ | |
29 | * Revision 2.4 91/05/14 16:06:35 mrt | |
30 | * Correcting copyright | |
31 | * | |
32 | * Revision 2.3 91/02/05 17:11:26 mrt | |
33 | * Changed to new Mach copyright | |
34 | * [91/02/01 17:31:41 mrt] | |
35 | * | |
36 | * Revision 2.2 90/05/03 15:25:03 dbg | |
37 | * Created. | |
38 | * [90/02/08 dbg] | |
39 | * | |
40 | */ | |
41 | ||
42 | #ifndef _I386_EFLAGS_H_ | |
43 | #define _I386_EFLAGS_H_ | |
44 | ||
45 | /* | |
46 | * i386 flags register | |
47 | */ | |
48 | #define EFL_CF 0x00000001 /* carry */ | |
49 | #define EFL_PF 0x00000004 /* parity of low 8 bits */ | |
50 | #define EFL_AF 0x00000010 /* carry out of bit 3 */ | |
51 | #define EFL_ZF 0x00000040 /* zero */ | |
52 | #define EFL_SF 0x00000080 /* sign */ | |
53 | #define EFL_TF 0x00000100 /* trace trap */ | |
54 | #define EFL_IF 0x00000200 /* interrupt enable */ | |
55 | #define EFL_DF 0x00000400 /* direction */ | |
56 | #define EFL_OF 0x00000800 /* overflow */ | |
57 | #define EFL_IOPL 0x00003000 /* IO privilege level: */ | |
58 | #define EFL_IOPL_KERNEL 0x00000000 /* kernel */ | |
59 | #define EFL_IOPL_USER 0x00003000 /* user */ | |
60 | #define EFL_NT 0x00004000 /* nested task */ | |
61 | #define EFL_RF 0x00010000 /* resume without tracing */ | |
62 | #define EFL_VM 0x00020000 /* virtual 8086 mode */ | |
63 | ||
64 | #define EFL_USER_SET (EFL_IF) | |
65 | #define EFL_USER_CLEAR (EFL_IOPL|EFL_NT|EFL_RF) | |
66 | ||
67 | #endif _I386_EFLAGS_H_ |