release/src-rt-6.x.4708/cfe/cfe/x86emu/x86emu/decode.h

   1 /****************************************************************************
   2 *
   3 *                                               Realmode X86 Emulator Library
   4 *
   5 *               Copyright (C) 1996-1999 SciTech Software, Inc.
   6 *                                    Copyright (C) David Mosberger-Tang
   7 *                                          Copyright (C) 1999 Egbert Eich
   8 *
   9 *  ========================================================================
  10 *
  11 *  Permission to use, copy, modify, distribute, and sell this software and
  12 *  its documentation for any purpose is hereby granted without fee,
  13 *  provided that the above copyright notice appear in all copies and that
  14 *  both that copyright notice and this permission notice appear in
  15 *  supporting documentation, and that the name of the authors not be used
  16 *  in advertising or publicity pertaining to distribution of the software
  17 *  without specific, written prior permission.  The authors makes no
  18 *  representations about the suitability of this software for any purpose.
  19 *  It is provided "as is" without express or implied warranty.
  20 *
  21 *  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  22 *  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  23 *  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  24 *  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
  25 *  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
  26 *  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  27 *  PERFORMANCE OF THIS SOFTWARE.
  28 *
  29 *  ========================================================================
  30 *
  31 * Language:             ANSI C
  32 * Environment:  Any
  33 * Developer:    Kendall Bennett
  34 *
  35 * Description:  Header file for instruction decoding logic.
  36 *
  37 ****************************************************************************/
  38
  39 #ifndef __X86EMU_DECODE_H
  40 #define __X86EMU_DECODE_H
  41
  42 /*---------------------- Macros and type definitions ----------------------*/
  43
  44 /* Instruction Decoding Stuff */
  45
  46 #define FETCH_DECODE_MODRM(mod,rh,rl)   fetch_decode_modrm(&mod,&rh,&rl)
  47 #define DECODE_RM_BYTE_REGISTER(r)      decode_rm_byte_register(r)
  48 #define DECODE_RM_WORD_REGISTER(r)      decode_rm_word_register(r)
  49 #define DECODE_RM_LONG_REGISTER(r)      decode_rm_long_register(r)
  50 #define DECODE_CLEAR_SEGOVR()           M.x86.mode &= ~SYSMODE_CLRMASK
  51
  52 /*-------------------------- Function Prototypes --------------------------*/
  53
  54 #ifdef  __cplusplus
  55 extern "C" {                                    /* Use "C" linkage when in C++ mode */
  56 #endif
  57
  58 void    x86emu_intr_raise (u8 type);
  59 void    fetch_decode_modrm (int *mod,int *regh,int *regl);
  60 u8      fetch_byte_imm (void);
  61 u16     fetch_word_imm (void);
  62 u32     fetch_long_imm (void);
  63 u8      fetch_data_byte (uint offset);
  64 u8      fetch_data_byte_abs (uint segment, uint offset);
  65 u16     fetch_data_word (uint offset);
  66 u16     fetch_data_word_abs (uint segment, uint offset);
  67 u32     fetch_data_long (uint offset);
  68 u32     fetch_data_long_abs (uint segment, uint offset);
  69 void    store_data_byte (uint offset, u8 val);
  70 void    store_data_byte_abs (uint segment, uint offset, u8 val);
  71 void    store_data_word (uint offset, u16 val);
  72 void    store_data_word_abs (uint segment, uint offset, u16 val);
  73 void    store_data_long (uint offset, u32 val);
  74 void    store_data_long_abs (uint segment, uint offset, u32 val);
  75 u8*     decode_rm_byte_register(int reg);
  76 u16*    decode_rm_word_register(int reg);
  77 u32*    decode_rm_long_register(int reg);
  78 u16*    decode_rm_seg_register(int reg);
  79 unsigned decode_rm00_address(int rm);
  80 unsigned decode_rm01_address(int rm);
  81 unsigned decode_rm10_address(int rm);
  82
  83 #ifdef  __cplusplus
  84 }                                               /* End of "C" linkage for C++           */
  85 #endif
  86
  87 #endif /* __X86EMU_DECODE_H */