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/*
** Starscream 680x0 emulation library
** Copyright 1997, 1998, 1999 Neill Corlett
**
** Refer to STARDOC.TXT for terms of use, API reference, and directions on
** how to compile.
*/
#ifndef __STARCPU_H__
#define __STARCPU_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Remember to byte-swap these regions. (read STARDOC.TXT for details) */
struct STARSCREAM_PROGRAMREGION {
unsigned lowaddr;
unsigned highaddr;
unsigned offset;
};
struct STARSCREAM_DATAREGION {
unsigned lowaddr;
unsigned highaddr;
void *memorycall;
void *userdata;
};
/* Memory structures for 16-bit data path */
#define STARSCREAM_CONTEXTINFO_MEM16 \
struct STARSCREAM_PROGRAMREGION *fetch; \
struct STARSCREAM_DATAREGION *readbyte; \
struct STARSCREAM_DATAREGION *readword; \
struct STARSCREAM_DATAREGION *writebyte; \
struct STARSCREAM_DATAREGION *writeword; \
struct STARSCREAM_PROGRAMREGION *s_fetch; \
struct STARSCREAM_DATAREGION *s_readbyte; \
struct STARSCREAM_DATAREGION *s_readword; \
struct STARSCREAM_DATAREGION *s_writebyte; \
struct STARSCREAM_DATAREGION *s_writeword; \
struct STARSCREAM_PROGRAMREGION *u_fetch; \
struct STARSCREAM_DATAREGION *u_readbyte; \
struct STARSCREAM_DATAREGION *u_readword; \
struct STARSCREAM_DATAREGION *u_writebyte; \
struct STARSCREAM_DATAREGION *u_writeword; \
/* Memory structures for 16-bit data path with function code support */
#define STARSCREAM_CONTEXTINFO_MEM16FC \
unsigned (*f_readbyte) (unsigned f, unsigned a); \
unsigned (*f_readword) (unsigned f, unsigned a); \
unsigned (*f_writebyte)(unsigned f, unsigned a); \
unsigned (*f_writeword)(unsigned f, unsigned a); \
/* Memory structures for 32-bit sizable data path */
#define STARSCREAM_CONTEXTINFO_MEM32 \
struct STARSCREAM_PROGRAMREGION *fetch; \
struct STARSCREAM_DATAREGION *readbus; \
struct STARSCREAM_DATAREGION *writebus; \
struct STARSCREAM_PROGRAMREGION *s_fetch; \
struct STARSCREAM_DATAREGION *s_readbus; \
struct STARSCREAM_DATAREGION *s_writebus; \
struct STARSCREAM_PROGRAMREGION *u_fetch; \
struct STARSCREAM_DATAREGION *u_readbus; \
struct STARSCREAM_DATAREGION *u_writebus; \
unsigned (*f_readbus) (unsigned f, unsigned a); \
unsigned (*f_writebus)(unsigned f, unsigned a); \
/* Common context info for all 680x0 types */
#define STARSCREAM_CONTEXTINFO_COMMON \
void (*resethandler)(void); \
unsigned dreg[8]; \
unsigned areg[8]; \
unsigned asp; \
unsigned pc; \
unsigned odometer; \
unsigned char interrupts[8]; \
unsigned short sr; \
/* 68000-specific context info */
#define STARSCREAM_CONTEXTINFO_68000SPECIFIC \
unsigned short contextfiller00; \
/* Context info for 68010 and higher */
#define STARSCREAM_CONTEXTINFO_68010 \
unsigned char sfc; \
unsigned char dfc; \
unsigned vbr; \
void (*bkpthandler)(void); \
/* 68010-specific context info */
#define STARSCREAM_CONTEXTINFO_68010SPECIFIC \
unsigned char loopmode; \
unsigned char contextfiller10[3]; \
/* Context info for 68020 and higher */
#define STARSCREAM_CONTEXTINFO_68020 \
unsigned asp2; \
struct S68000CONTEXT {
STARSCREAM_CONTEXTINFO_MEM16
STARSCREAM_CONTEXTINFO_COMMON
STARSCREAM_CONTEXTINFO_68000SPECIFIC
};
struct S68010CONTEXT {
STARSCREAM_CONTEXTINFO_MEM16
STARSCREAM_CONTEXTINFO_MEM16FC
STARSCREAM_CONTEXTINFO_COMMON
STARSCREAM_CONTEXTINFO_68010
STARSCREAM_CONTEXTINFO_68010SPECIFIC
};
struct S68020CONTEXT {
STARSCREAM_CONTEXTINFO_MEM32
STARSCREAM_CONTEXTINFO_COMMON
STARSCREAM_CONTEXTINFO_68010
STARSCREAM_CONTEXTINFO_68020
};
#define STARSCREAM_IDENTIFIERS(SNC,SN) \
\
extern struct SNC##CONTEXT SN##context; \
\
int SN##init (void); \
unsigned SN##reset (void); \
unsigned SN##exec (int n); \
int SN##interrupt (int level, int vector); \
void SN##flushInterrupts (void); \
int SN##GetContextSize (void); \
void SN##GetContext (void *context); \
void SN##SetContext (void *context); \
int SN##fetch (unsigned address); \
unsigned SN##readOdometer (void); \
unsigned SN##tripOdometer (void); \
unsigned SN##controlOdometer (int n); \
void SN##releaseTimeslice (void); \
unsigned SN##readPC (void); \
STARSCREAM_IDENTIFIERS(S68000,s68000)
STARSCREAM_IDENTIFIERS(S68010,s68010)
STARSCREAM_IDENTIFIERS(S68020,s68020)
#ifdef __cplusplus
}
#endif
#endif
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