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68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
/*
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* cpu_emulation.h - Definitions for Basilisk II CPU emulation module (native 68k version)
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*
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* Basilisk II (C) 1997-2008 Christian Bauer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 *(uint32 *)addr;}
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static inline uint32 ReadMacInt16(uint32 addr) {return *(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 = l;}
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static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = 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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static inline uint32 Host2MacAddr(uint8 *addr) {return (uint32)addr;}
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static inline void *Mac_memset(uint32 addr, int c, size_t n) {return memset(Mac2HostAddr(addr), c, n);}
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static inline void *Mac2Host_memcpy(void *dest, uint32 src, size_t n) {return memcpy(dest, Mac2HostAddr(src), n);}
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static inline void *Host2Mac_memcpy(uint32 dest, const void *src, size_t n) {return memcpy(Mac2HostAddr(dest), src, n);}
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static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return memcpy(Mac2HostAddr(dest), Mac2HostAddr(src), n);}
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/*
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* 680x0 emulation
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*/
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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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extern void TriggerNMI(void); // Trigger interrupt level 7
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#endif
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