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