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/ast.h

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    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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