usr/src/uts/intel/ia32/sys/psw.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T   */
  23 /*        All Rights Reserved   */
  24
  25 /*
  26  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  27  * Use is subject to license terms.
  28  */
  29
  30 #ifndef _IA32_SYS_PSW_H
  31 #define _IA32_SYS_PSW_H
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #ifndef _ASM
  38
  39 /* Flags Register */
  40
  41 typedef struct flags {
  42         uint_t  fl_cf   :  1,           /* carry/borrow */
  43                         :  1,           /* reserved */
  44                 fl_pf   :  1,           /* parity */
  45                         :  1,           /* reserved */
  46                 fl_af   :  1,           /* carry/borrow */
  47                         :  1,           /* reserved */
  48                 fl_zf   :  1,           /* zero */
  49                 fl_sf   :  1,           /* sign */
  50                 fl_tf   :  1,           /* trace */
  51                 fl_if   :  1,           /* interrupt enable */
  52                 fl_df   :  1,           /* direction */
  53                 fl_of   :  1,           /* overflow */
  54                 fl_iopl :  2,           /* I/O privilege level */
  55                 fl_nt   :  1,           /* nested task */
  56                         :  1,           /* reserved */
  57                 fl_rf   :  1,           /* reset */
  58                 fl_vm   :  1,           /* virtual 86 mode */
  59                 fl_res  : 14;           /* reserved */
  60 } flags_t;
  61
  62 #endif          /* !_ASM */
  63
  64 #define PS_C            0x0001          /* carry bit                    */
  65 #define PS_MB1          0x0002          /* unused; must be 1.           */
  66 #define PS_P            0x0004          /* parity bit                   */
  67 #define PS_AC           0x0010          /* auxiliary carry bit          */
  68 #define PS_Z            0x0040          /* zero bit                     */
  69 #define PS_N            0x0080          /* negative bit                 */
  70 #define PS_T            0x0100          /* trace enable bit             */
  71 #define PS_IE           0x0200          /* interrupt enable bit         */
  72 #define PS_D            0x0400          /* direction bit                */
  73 #define PS_V            0x0800          /* overflow bit                 */
  74 #define PS_IOPL         0x3000          /* I/O privilege level          */
  75 #define PS_NT           0x4000          /* nested task flag             */
  76 #define PS_RF           0x10000         /* restore flag                 */
  77 #define PS_VM           0x20000         /* virtual 86 mode flag         */
  78 #define PS_ACHK         0x40000         /* alignment check enable (486) */
  79 #define PS_VINT         0x80000         /* virtual interrupt flag       */
  80 #define PS_VINTP        0x100000        /* virtual interrupt pending    */
  81 #define PS_ID           0x200000        /* ID flag                      */
  82
  83 #define PS_ICC          (PS_C|PS_AC|PS_Z|PS_N)     /* integer condition codes */
  84
  85 #define FMT_FLAGS_REG                           \
  86         "\20\26id\25vip\24vif\23ac\22vm\21rf"   \
  87         "\17nt\14of\13df\12if\11tf\10sf\7zf\5af\3pf\1cf"
  88
  89 #define PSL_USER        0x202           /* initial user FLAGS */
  90
  91 /* user variable PS bits */
  92 #define PSL_USERMASK    (PS_ICC|PS_D|PS_T|PS_V|PS_P|PS_ACHK|PS_NT)
  93
  94 /* PS bits changeable by the sahf instruction */
  95 #define PSL_LSAHFMASK   (PS_ICC|PS_P)
  96
  97 /*
  98  * kernel flags settings
  99  *
 100  * Note that the kernel's SMAP protection relies on PS_ACHK not being present in
 101  * the following two definitions. See uts/intel/ia32/ml/copy.s for more
 102  * information on SMAP.
 103  */
 104 #define F_OFF           0x2             /* interrupts off */
 105 #define F_ON            0x202           /* interrupts on */
 106
 107 #ifndef _ASM
 108 typedef int     psw_t;
 109 #endif
 110
 111 #include <sys/tss.h>
 112 #include <sys/segments.h>                       /* selector definitions */
 113
 114 #define USERMODE(cs)    ((uint16_t)(cs) != KCS_SEL)
 115
 116 #include <sys/spl.h>
 117
 118 #ifdef  __cplusplus
 119 }
 120 #endif
 121
 122 #endif  /* _IA32_SYS_PSW_H */