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/*************************************************************************** 
 
	memintrf.c 
 
	メモリインターフェース及びM68000用メモリアクセス関数 
 
***************************************************************************/ 
 
#ifndef MEMINTRF_H 
#define MEMINTRF_H 
 
/*------------------------------------------------------ 
  メモリインターフェース 
 -----------------------------------------------------*/ 
 
#define MAX_MEMORY_REGIONS 16 
 
typedef UINT32  offs_t; 
 
enum 
{ 
	REGION_INVALID = 0xff, 
	REGION_CPU1 = 0, 
	REGION_CPU2, 
	REGION_GFX1, 
	REGION_GFX2, 
	REGION_GFX3, 
	REGION_GFX4, 
#if ENABLE_SYSTEM_CHECK 
	REGION_GFX5, 
	REGION_GFX6, 
#endif 
	REGION_SOUND1, 
	REGION_USER1, 
	REGION_USER2, 
	REGION_USER3, 
	REGION_MAX 
}; 
 
typedef struct RegionInfo 
{ 
	UINT8  *base; 
	size_t length; 
	UINT32 type; 
	UINT32 flags; 
} MEMREGION; 
 
 
/*------------------------------------------------------ 
  メモリインターフェース用関数 
 -----------------------------------------------------*/ 
 
int  memory_region_init(void); 
void memory_region_shutdown(void); 
 
int  memory_init(void); 
void memory_shutdown(void); 
 
UINT8  *memory_region(int region_type); 
size_t memory_region_length(int region_type); 
 
 
/*------------------------------------------------------ 
  M68000メモリアクセス 
 -----------------------------------------------------*/ 
 
extern UINT8 *m68k_rombase; 
extern UINT8 *m68k_rambase; 
extern UINT8 *opcode_base; 
extern UINT8 *opcode_rambase; 
extern UINT8 *opcode_entry; 
 
#define READ8_HANDLER(name) 	UINT8  name(offs_t offset) 
#define WRITE8_HANDLER(name) 	void   name(offs_t offset, UINT8 data) 
#define READ16_HANDLER(name)	UINT16 name(offs_t offset, UINT16 mem_mask) 
#define WRITE16_HANDLER(name)	void   name(offs_t offset, UINT16 data, UINT16 mem_mask) 
#define READ32_HANDLER(name)	UINT32 name(offs_t offset) 
#define WRITE32_HANDLER(name)	void   name(offs_t offset, UINT32 data) 
 
/* ----- 16/32-bit memory accessing ----- */ 
#define COMBINE_DATA(varptr)		(*(varptr) = (*(varptr) & mem_mask) | (data & ~mem_mask)) 
#define COMBINE_SWABDATA(varptr)	(*(varptr) = (*(varptr) & (mem_mask << 8)) | (data & ~(mem_mask >> 8))) 
 
/* ----- 16-bit memory accessing ----- */ 
#define ACCESSING_LSB16				((mem_mask & 0x00ff) == 0) 
#define ACCESSING_MSB16				((mem_mask & 0xff00) == 0) 
#define ACCESSING_LSB				ACCESSING_LSB16 
#define ACCESSING_MSB				ACCESSING_MSB16 
 
#define MEM_END	    -1 
#define MEM_BAD     0 
#define MEM_ROM     1 
#define MEM_RAM     2 
#define MEM_NOP     3 
#define MEM_MAP     4 
 
typedef struct readmem_t 
{ 
	int type; 
	offs_t start; 
	offs_t end; 
	UINT16 (*func)(offs_t offset, UINT16 mem_mask); 
} READMEM; 
 
typedef struct writemem_t 
{ 
	int type; 
	offs_t start; 
	offs_t end; 
	void (*func)(offs_t offset, UINT16 data, UINT16 mem_mask); 
} WRITEMEM; 
 
 
/*------------------------------------------------------ 
  M68000メモリアクセス用関数 
 -----------------------------------------------------*/ 
 
void initialize_memmap(void); 
 
UINT8  __cdecl m68000_read_memory_8(offs_t offset); 
UINT16 __cdecl m68000_read_memory_16(offs_t offset); 
UINT32 __cdecl m68000_read_memory_32(offs_t offset); 
void __cdecl m68000_write_memory_8(offs_t offset, UINT8 data); 
void __cdecl m68000_write_memory_16(offs_t offset, UINT16 data); 
void __cdecl m68000_write_memory_32(offs_t offset, UINT32 data); 
 
void __cdecl m68000_setopbase(offs_t offset); 
 
extern int m68000_read_memory_8_debug(int offset); 
extern int m68000_read_memory_16_debug(int offset); 
extern int m68000_read_memory_32_debug(int offset); 
 
#endif /* MEMINTRF_H */