osfmk/i386/eflags.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * Mach Operating System
  35  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  36  * All Rights Reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software and its
  39  * documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  46  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  51  *  School of Computer Science
  52  *  Carnegie Mellon University
  53  *  Pittsburgh PA 15213-3890
  54  *
  55  * any improvements or extensions that they make and grant Carnegie Mellon
  56  * the rights to redistribute these changes.
  57  */
  58 /*
  59  */
  60
  61 #ifndef _I386_EFLAGS_H_
  62 #define _I386_EFLAGS_H_
  63
  64 /*
  65  *      i386 flags register
  66  */
  67
  68 #ifndef EFL_CF
  69 #define EFL_CF          0x00000001              /* carry */
  70 #define EFL_PF          0x00000004              /* parity of low 8 bits */
  71 #define EFL_AF          0x00000010              /* carry out of bit 3 */
  72 #define EFL_ZF          0x00000040              /* zero */
  73 #define EFL_SF          0x00000080              /* sign */
  74 #define EFL_TF          0x00000100              /* trace trap */
  75 #define EFL_IF          0x00000200              /* interrupt enable */
  76 #define EFL_DF          0x00000400              /* direction */
  77 #define EFL_OF          0x00000800              /* overflow */
  78 #define EFL_IOPL        0x00003000              /* IO privilege level: */
  79 #define EFL_IOPL_KERNEL 0x00000000                      /* kernel */
  80 #define EFL_IOPL_USER   0x00003000                      /* user */
  81 #define EFL_NT          0x00004000              /* nested task */
  82 #define EFL_RF          0x00010000              /* resume without tracing */
  83 #define EFL_VM          0x00020000              /* virtual 8086 mode */
  84 #define EFL_AC          0x00040000              /* alignment check */
  85 #define EFL_VIF         0x00080000              /* virtual interrupt flag */
  86 #define EFL_VIP         0x00100000              /* virtual interrupt pending */
  87 #define EFL_ID          0x00200000              /* cpuID instruction */
  88 #endif
  89
  90 #define EFL_CLR         0xfff88028
  91 #define EFL_SET         0x00000002
  92
  93 #define EFL_USER_SET    (EFL_IF)
  94 #define EFL_USER_CLEAR  (EFL_IOPL|EFL_NT|EFL_RF)
  95
  96 #endif  /* _I386_EFLAGS_H_ */