FreeBSD/Linux Kernel Cross Reference
sys/i386/ast.h
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 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: ast.h,v $
29 * Revision 2.6 92/04/06 01:16:07 rpd
30 * Added MACHINE_AST_PER_THREAD. From dbg.
31 * [92/04/05 rpd]
32 *
33 * Revision 2.5 92/01/03 20:04:28 dbg
34 * Add AST_I386_FP to handle delayed floating-point exceptions.
35 * [91/10/29 dbg]
36 *
37 * Revision 2.4 91/05/14 16:03:02 mrt
38 * Correcting copyright
39 *
40 * Revision 2.3 91/02/05 17:10:46 mrt
41 * Changed to new Mach copyright
42 * [91/02/01 17:30:36 mrt]
43 *
44 * Revision 2.2 90/05/03 15:24:36 dbg
45 * Created.
46 * [89/02/21 dbg]
47 *
48 */
49
50 #ifndef _I386_AST_H_
51 #define _I386_AST_H_
52
53 /*
54 * Machine-dependent AST file for machines with no hardware AST support.
55 *
56 * For the I386, we define AST_I386_FP to handle delayed
57 * floating-point exceptions. The FPU may interrupt on errors
58 * while the user is not running (in kernel or other thread running).
59 */
60
61 #define AST_I386_FP 0x80000000
62
63 #define MACHINE_AST_PER_THREAD AST_I386_FP
64
65 #endif /* _I386_AST_H_ */
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