osfmk/i386/eflags.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58
  59 #ifndef _I386_EFLAGS_H_
  60 #define _I386_EFLAGS_H_
  61
  62 /*
  63  *      i386 flags register
  64  */
  65
  66 #ifndef EFL_CF
  67 #define EFL_CF          0x00000001              /* carry */
  68 #define EFL_PF          0x00000004              /* parity of low 8 bits */
  69 #define EFL_AF          0x00000010              /* carry out of bit 3 */
  70 #define EFL_ZF          0x00000040              /* zero */
  71 #define EFL_SF          0x00000080              /* sign */
  72 #define EFL_TF          0x00000100              /* trace trap */
  73 #define EFL_IF          0x00000200              /* interrupt enable */
  74 #define EFL_DF          0x00000400              /* direction */
  75 #define EFL_OF          0x00000800              /* overflow */
  76 #define EFL_IOPL        0x00003000              /* IO privilege level: */
  77 #define EFL_IOPL_KERNEL 0x00000000                      /* kernel */
  78 #define EFL_IOPL_USER   0x00003000                      /* user */
  79 #define EFL_NT          0x00004000              /* nested task */
  80 #define EFL_RF          0x00010000              /* resume without tracing */
  81 #define EFL_VM          0x00020000              /* virtual 8086 mode */
  82 #define EFL_AC          0x00040000              /* alignment check */
  83 #define EFL_VIF         0x00080000              /* virtual interrupt flag */
  84 #define EFL_VIP         0x00100000              /* virtual interrupt pending */
  85 #define EFL_ID          0x00200000              /* cpuID instruction */
  86 #endif
  87
  88 #define EFL_CLR         0xfff88028
  89 #define EFL_SET         0x00000002
  90
  91 #define EFL_USER_SET    (EFL_IF)
  92 #define EFL_USER_CLEAR  (EFL_IOPL|EFL_NT|EFL_RF)
  93
  94 #endif  /* _I386_EFLAGS_H_ */