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C/C++ Source or Header  |  1999-06-16  |  6KB  |  149 lines
  1. /*
  2. ** Starscream 680x0 emulation library
  3. ** Copyright 1997, 1998, 1999 Neill Corlett
  4. **
  5. ** Refer to STARDOC.TXT for terms of use, API reference, and directions on
  6. ** how to compile.
  7. */
  8.  
  9. #ifndef __STARCPU_H__
  10. #define __STARCPU_H__
  11.  
  12. #ifdef __cplusplus
  13. extern "C" {
  14. #endif
  15.  
  16. /* Remember to byte-swap these regions. (read STARDOC.TXT for details) */
  17. struct STARSCREAM_PROGRAMREGION {
  18.     unsigned lowaddr;
  19.     unsigned highaddr;
  20.     unsigned offset;
  21. };
  22.  
  23. struct STARSCREAM_DATAREGION {
  24.     unsigned lowaddr;
  25.     unsigned highaddr;
  26.     void    *memorycall;
  27.     void    *userdata;
  28. };
  29.  
  30. /* Memory structures for 16-bit data path */
  31. #define STARSCREAM_CONTEXTINFO_MEM16                          \
  32.     struct STARSCREAM_PROGRAMREGION *fetch;               \
  33.     struct STARSCREAM_DATAREGION    *readbyte;            \
  34.     struct STARSCREAM_DATAREGION    *readword;            \
  35.     struct STARSCREAM_DATAREGION    *writebyte;           \
  36.     struct STARSCREAM_DATAREGION    *writeword;           \
  37.     struct STARSCREAM_PROGRAMREGION *s_fetch;             \
  38.     struct STARSCREAM_DATAREGION    *s_readbyte;          \
  39.     struct STARSCREAM_DATAREGION    *s_readword;          \
  40.     struct STARSCREAM_DATAREGION    *s_writebyte;         \
  41.     struct STARSCREAM_DATAREGION    *s_writeword;         \
  42.     struct STARSCREAM_PROGRAMREGION *u_fetch;             \
  43.     struct STARSCREAM_DATAREGION    *u_readbyte;          \
  44.     struct STARSCREAM_DATAREGION    *u_readword;          \
  45.     struct STARSCREAM_DATAREGION    *u_writebyte;         \
  46.     struct STARSCREAM_DATAREGION    *u_writeword;         \
  47.  
  48. /* Memory structures for 16-bit data path with function code support */
  49. #define STARSCREAM_CONTEXTINFO_MEM16FC                        \
  50.     unsigned     (*f_readbyte) (unsigned f, unsigned a);  \
  51.     unsigned     (*f_readword) (unsigned f, unsigned a);  \
  52.     unsigned     (*f_writebyte)(unsigned f, unsigned a);  \
  53.     unsigned     (*f_writeword)(unsigned f, unsigned a);  \
  54.  
  55. /* Memory structures for 32-bit sizable data path */
  56. #define STARSCREAM_CONTEXTINFO_MEM32                          \
  57.     struct STARSCREAM_PROGRAMREGION *fetch;               \
  58.     struct STARSCREAM_DATAREGION    *readbus;             \
  59.     struct STARSCREAM_DATAREGION    *writebus;            \
  60.     struct STARSCREAM_PROGRAMREGION *s_fetch;             \
  61.     struct STARSCREAM_DATAREGION    *s_readbus;           \
  62.     struct STARSCREAM_DATAREGION    *s_writebus;          \
  63.     struct STARSCREAM_PROGRAMREGION *u_fetch;             \
  64.     struct STARSCREAM_DATAREGION    *u_readbus;           \
  65.     struct STARSCREAM_DATAREGION    *u_writebus;          \
  66.     unsigned     (*f_readbus) (unsigned f, unsigned a);   \
  67.     unsigned     (*f_writebus)(unsigned f, unsigned a);   \
  68.  
  69. /* Common context info for all 680x0 types */
  70. #define STARSCREAM_CONTEXTINFO_COMMON                         \
  71.     void         (*resethandler)(void);                   \
  72.     unsigned       dreg[8];                               \
  73.     unsigned       areg[8];                               \
  74.     unsigned       asp;                                   \
  75.     unsigned       pc;                                    \
  76.     unsigned       odometer;                              \
  77.     unsigned char  interrupts[8];                         \
  78.     unsigned short sr;                                    \
  79.  
  80. /* 68000-specific context info */
  81. #define STARSCREAM_CONTEXTINFO_68000SPECIFIC                  \
  82.     unsigned short contextfiller00;                       \
  83.  
  84. /* Context info for 68010 and higher */
  85. #define STARSCREAM_CONTEXTINFO_68010                          \
  86.     unsigned char  sfc;                                   \
  87.     unsigned char  dfc;                                   \
  88.     unsigned       vbr;                                   \
  89.     void         (*bkpthandler)(void);                    \
  90.  
  91. /* 68010-specific context info */
  92. #define STARSCREAM_CONTEXTINFO_68010SPECIFIC                  \
  93.     unsigned char  loopmode;                              \
  94.     unsigned char  contextfiller10[3];                    \
  95.  
  96. /* Context info for 68020 and higher */
  97. #define STARSCREAM_CONTEXTINFO_68020                          \
  98.     unsigned       asp2;                                  \
  99.  
  100. struct S68000CONTEXT {
  101.     STARSCREAM_CONTEXTINFO_MEM16
  102.     STARSCREAM_CONTEXTINFO_COMMON
  103.     STARSCREAM_CONTEXTINFO_68000SPECIFIC
  104. };
  105.  
  106. struct S68010CONTEXT {
  107.     STARSCREAM_CONTEXTINFO_MEM16
  108.     STARSCREAM_CONTEXTINFO_MEM16FC
  109.     STARSCREAM_CONTEXTINFO_COMMON
  110.     STARSCREAM_CONTEXTINFO_68010
  111.     STARSCREAM_CONTEXTINFO_68010SPECIFIC
  112. };
  113.  
  114. struct S68020CONTEXT {
  115.     STARSCREAM_CONTEXTINFO_MEM32
  116.     STARSCREAM_CONTEXTINFO_COMMON
  117.     STARSCREAM_CONTEXTINFO_68010
  118.     STARSCREAM_CONTEXTINFO_68020
  119. };
  120.  
  121. #define STARSCREAM_IDENTIFIERS(SNC,SN)                        \
  122.                                                               \
  123. extern struct SNC##CONTEXT SN##context;                       \
  124.                                                               \
  125. int      SN##init             (void);                         \
  126. unsigned SN##reset            (void);                         \
  127. unsigned SN##exec             (int n);                        \
  128. int      SN##interrupt        (int level, int vector);        \
  129. void     SN##flushInterrupts  (void);                         \
  130. int      SN##GetContextSize   (void);                         \
  131. void     SN##GetContext       (void *context);                \
  132. void     SN##SetContext       (void *context);                \
  133. int      SN##fetch            (unsigned address);             \
  134. unsigned SN##readOdometer     (void);                         \
  135. unsigned SN##tripOdometer     (void);                         \
  136. unsigned SN##controlOdometer  (int n);                        \
  137. void     SN##releaseTimeslice (void);                         \
  138. unsigned SN##readPC           (void);                         \
  139.  
  140. STARSCREAM_IDENTIFIERS(S68000,s68000)
  141. STARSCREAM_IDENTIFIERS(S68010,s68010)
  142. STARSCREAM_IDENTIFIERS(S68020,s68020)
  143.  
  144. #ifdef __cplusplus
  145. }
  146. #endif
  147.  
  148. #endif
  149.