79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
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/*
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* plex86: run multiple x86 operating systems concurrently
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* Copyright (C) 1999-2003 Kevin P. Lawton
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*
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* eflags.h: Bitfields of EFLAGS registers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __EFLAGS_H__
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#define __EFLAGS_H__
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/*
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* the eflags field looks like this:
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* bit: 0 1 2 3 4 5 6 7 8 9 A B C/D E F 10 11 12 13 14 15 16
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* flg: CF 1 PF 0 AF 0 ZF SF TF IF DF OF IOPL NT 0 RF VM AC VIF VIP ID 0
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*/
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#define FLG_CF (1<<0)
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#define FLG_PF (1<<2)
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#define FLG_AF (1<<4)
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#define FLG_ZF (1<<6)
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#define FLG_SF (1<<7)
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#define FLG_TF (1<<8)
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#define FLG_IF (1<<9)
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#define FLG_DF (1<<10)
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#define FLG_OF (1<<11)
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#define FLG_IOPL (3<<12)
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#define FLG_NT (1<<14)
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#define FLG_RF (1<<16)
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#define FLG_VM (1<<17)
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#define FLG_AC (1<<18)
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#define FLG_VIF (1<<19)
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#define FLG_VIP (1<<20)
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#define FLG_ID (1<<21)
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typedef union {
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struct {
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Bit8u cf:1;
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Bit8u R1:1;
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Bit8u pf:1;
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Bit8u R3:1;
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Bit8u af:1;
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Bit8u R5:1;
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Bit8u zf:1;
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Bit8u sf:1;
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Bit8u tf:1;
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Bit8u if_:1;
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Bit8u df:1;
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Bit8u of:1;
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Bit8u iopl:2;
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Bit8u nt:1;
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Bit8u R15:1;
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Bit8u rf:1;
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Bit8u vm:1;
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Bit8u ac:1;
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Bit8u vif:1;
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Bit8u vip:1;
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Bit8u id:1;
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Bit16u R31_22:10;
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} __attribute__ ((packed)) fields;
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Bit32u raw;
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} __attribute__ ((packed)) eflags_t;
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#endif /* __EFLAGS_H__ */
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