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cebix |
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/* |
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* cpu_emulation.h - Definitions for Basilisk II CPU emulation module (Apple PowerMac ROM 680x0 emulator version (BeOS/PPC)) |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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*/ |
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#ifndef CPU_EMULATION_H |
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#define CPU_EMULATION_H |
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/* |
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* Memory system |
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*/ |
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// RAM and ROM pointers (allocated and set by main_*.cpp) |
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extern uint32 RAMBaseMac; // RAM base (Mac address space), does not include Low Mem when != 0 |
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extern uint8 *RAMBaseHost; // RAM base (host address space) |
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extern uint32 RAMSize; // Size of RAM |
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extern uint32 ROMBaseMac; // ROM base (Mac address space) |
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extern uint8 *ROMBaseHost; // ROM base (host address space) |
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extern uint32 ROMSize; // Size of ROM |
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// Mac memory access functions |
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static inline uint32 ReadMacInt32(uint32 addr) {return ntohl(*(uint32 *)addr);} |
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static inline uint32 ReadMacInt16(uint32 addr) {return ntohs(*(uint16 *)addr);} |
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static inline uint32 ReadMacInt8(uint32 addr) {return *(uint8 *)addr;} |
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static inline void WriteMacInt32(uint32 addr, uint32 l) {*(uint32 *)addr = htonl(l);} |
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static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = htons(w);} |
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static inline void WriteMacInt8(uint32 addr, uint32 b) {*(uint8 *)addr = b;} |
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static inline uint8 *Mac2HostAddr(uint32 addr) {return (uint8 *)addr;} |
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/* |
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* 680x0 emulation |
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*/ |
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// Initialization |
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extern bool Init680x0(void); // This routine may want to look at CPUType/FPUType to set up the apropriate emulation |
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extern void Exit680x0(void); |
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// 680x0 emulation functions |
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struct M68kRegisters; |
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extern void Start680x0(void); // Reset and start 680x0 |
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extern "C" void Execute68k(uint32 addr, M68kRegisters *r); // Execute 68k code from EMUL_OP routine |
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extern "C" void Execute68kTrap(uint16 trap, M68kRegisters *r); // Execute MacOS 68k trap from EMUL_OP routine |
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// Interrupt functions |
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extern void TriggerInterrupt(void); // Trigger interrupt (InterruptFlag must be set first) |
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#endif |
