FreeBSD/Linux Kernel Cross Reference
sys/contrib/x86emu/x86emu_regs.h

     /*      $NetBSD: x86emu_regs.h,v 1.1 2007/12/01 20:14:10 joerg Exp $    */
     /*      $OpenBSD: x86emu_regs.h,v 1.2 2009/06/06 03:45:05 matthieu Exp $ */
     
     /****************************************************************************
     *
     *  Realmode X86 Emulator Library
     *
     *  Copyright (C) 1996-1999 SciTech Software, Inc.
     *  Copyright (C) David Mosberger-Tang
    *  Copyright (C) 1999 Egbert Eich
    *  Copyright (C) 2007 Joerg Sonnenberger
    *
    *  ========================================================================
    *
    *  Permission to use, copy, modify, distribute, and sell this software and
    *  its documentation for any purpose is hereby granted without fee,
    *  provided that the above copyright notice appear in all copies and that
    *  both that copyright notice and this permission notice appear in
    *  supporting documentation, and that the name of the authors not be used
    *  in advertising or publicity pertaining to distribution of the software
    *  without specific, written prior permission.  The authors makes no
    *  representations about the suitability of this software for any purpose.
    *  It is provided "as is" without express or implied warranty.
    *
    *  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
    *  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
    *  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
    *  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
    *  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    *  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    *  PERFORMANCE OF THIS SOFTWARE.
    *
    ****************************************************************************/
    
    #ifndef __X86EMU_REGS_H
    #define __X86EMU_REGS_H
    
    /*---------------------- Macros and type definitions ----------------------*/
    
    /* 8 bit registers */
    #define R_AH  register_a.I8_reg.h_reg
    #define R_AL  register_a.I8_reg.l_reg
    #define R_BH  register_b.I8_reg.h_reg
    #define R_BL  register_b.I8_reg.l_reg
    #define R_CH  register_c.I8_reg.h_reg
    #define R_CL  register_c.I8_reg.l_reg
    #define R_DH  register_d.I8_reg.h_reg
    #define R_DL  register_d.I8_reg.l_reg
    
    /* 16 bit registers */
    #define R_AX  register_a.I16_reg.x_reg
    #define R_BX  register_b.I16_reg.x_reg
    #define R_CX  register_c.I16_reg.x_reg
    #define R_DX  register_d.I16_reg.x_reg
    
    /* 32 bit extended registers */
    #define R_EAX  register_a.I32_reg.e_reg
    #define R_EBX  register_b.I32_reg.e_reg
    #define R_ECX  register_c.I32_reg.e_reg
    #define R_EDX  register_d.I32_reg.e_reg
    
    /* special registers */
    #define R_SP  register_sp.I16_reg.x_reg
    #define R_BP  register_bp.I16_reg.x_reg
    #define R_SI  register_si.I16_reg.x_reg
    #define R_DI  register_di.I16_reg.x_reg
    #define R_IP  register_ip.I16_reg.x_reg
    #define R_FLG register_flags
    
    /* special registers */
    #define R_ESP  register_sp.I32_reg.e_reg
    #define R_EBP  register_bp.I32_reg.e_reg
    #define R_ESI  register_si.I32_reg.e_reg
    #define R_EDI  register_di.I32_reg.e_reg
    #define R_EIP  register_ip.I32_reg.e_reg
    #define R_EFLG register_flags
    
    /* segment registers */
    #define R_CS  register_cs
    #define R_DS  register_ds
    #define R_SS  register_ss
    #define R_ES  register_es
    #define R_FS  register_fs
    #define R_GS  register_gs
    
    /* flag conditions   */
    #define FB_CF 0x0001            /* CARRY flag  */
    #define FB_PF 0x0004            /* PARITY flag */
    #define FB_AF 0x0010            /* AUX  flag   */
    #define FB_ZF 0x0040            /* ZERO flag   */
    #define FB_SF 0x0080            /* SIGN flag   */
    #define FB_TF 0x0100            /* TRAP flag   */
    #define FB_IF 0x0200            /* INTERRUPT ENABLE flag */
    #define FB_DF 0x0400            /* DIR flag    */
    #define FB_OF 0x0800            /* OVERFLOW flag */
    
    /* 80286 and above always have bit#1 set */
    #define F_ALWAYS_ON  (0x0002)   /* flag bits always on */
    
   /*
    * Define a mask for only those flag bits we will ever pass back 
    * (via PUSHF) 
    */
   #define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
   
   /* following bits masked in to a 16bit quantity */
   
   #define F_CF 0x0001             /* CARRY flag  */
   #define F_PF 0x0004             /* PARITY flag */
   #define F_AF 0x0010             /* AUX  flag   */
   #define F_ZF 0x0040             /* ZERO flag   */
   #define F_SF 0x0080             /* SIGN flag   */
   #define F_TF 0x0100             /* TRAP flag   */
   #define F_IF 0x0200             /* INTERRUPT ENABLE flag */
   #define F_DF 0x0400             /* DIR flag    */
   #define F_OF 0x0800             /* OVERFLOW flag */
   
   #define SET_FLAG(flag)          (emu->x86.R_FLG |= (flag))
   #define CLEAR_FLAG(flag)        (emu->x86.R_FLG &= ~(flag))
   #define ACCESS_FLAG(flag)       (emu->x86.R_FLG & (flag))
   #define CLEARALL_FLAG(m)        (emu->x86.R_FLG = 0)
   
   #define CONDITIONAL_SET_FLAG(COND,FLAG) \
     if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
   
   #define F_PF_CALC 0x010000      /* PARITY flag has been calced    */
   #define F_ZF_CALC 0x020000      /* ZERO flag has been calced      */
   #define F_SF_CALC 0x040000      /* SIGN flag has been calced      */
   
   #define F_ALL_CALC      0xff0000        /* All have been calced   */
   
   /*
    * Emulator machine state.
    * Segment usage control.
    */
   #define SYSMODE_SEG_DS_SS       0x00000001
   #define SYSMODE_SEGOVR_CS       0x00000002
   #define SYSMODE_SEGOVR_DS       0x00000004
   #define SYSMODE_SEGOVR_ES       0x00000008
   #define SYSMODE_SEGOVR_FS       0x00000010
   #define SYSMODE_SEGOVR_GS       0x00000020
   #define SYSMODE_SEGOVR_SS       0x00000040
   #define SYSMODE_PREFIX_REPE     0x00000080
   #define SYSMODE_PREFIX_REPNE    0x00000100
   #define SYSMODE_PREFIX_DATA     0x00000200
   #define SYSMODE_PREFIX_ADDR     0x00000400
   #define SYSMODE_INTR_PENDING    0x10000000
   #define SYSMODE_EXTRN_INTR      0x20000000
   #define SYSMODE_HALTED          0x40000000
   
   #define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS      | \
                                                    SYSMODE_SEGOVR_CS      | \
                                                    SYSMODE_SEGOVR_DS      | \
                                                    SYSMODE_SEGOVR_ES      | \
                                                    SYSMODE_SEGOVR_FS      | \
                                                    SYSMODE_SEGOVR_GS      | \
                                                    SYSMODE_SEGOVR_SS)
   #define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS      | \
                                                    SYSMODE_SEGOVR_CS      | \
                                                    SYSMODE_SEGOVR_DS      | \
                                                    SYSMODE_SEGOVR_ES      | \
                                                    SYSMODE_SEGOVR_FS      | \
                                                    SYSMODE_SEGOVR_GS      | \
                                                    SYSMODE_SEGOVR_SS      | \
                                                    SYSMODE_PREFIX_DATA    | \
                                                    SYSMODE_PREFIX_ADDR)
   
   #define  INTR_SYNCH           0x1
   
   #endif /* __X86EMU_REGS_H */

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