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/* |
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* cpu_emulation.h - Definitions for CPU emulation and Mac memory access |
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* |
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* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig |
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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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*/ |
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// Constants |
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const uint32 ROM_BASE = 0x40800000; // Base address of ROM |
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const uint32 ROM_SIZE = 0x00400000; // Size of ROM file |
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const uint32 DR_CACHE_BASE = 0x69000000; // Address of DR cache |
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const uint32 DR_CACHE_SIZE = 0x80000; // Size of DR Cache |
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const uint32 ROM_SIZE = 0x400000; // Size of ROM file |
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const uint32 ROM_AREA_SIZE = 0x500000; // Size of ROM area |
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const uintptr DR_EMULATOR_BASE = 0x68070000; // Address of DR emulator code |
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const uint32 DR_EMULATOR_SIZE = 0x10000; // Size of DR emulator code |
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const uintptr DR_CACHE_BASE = 0x69000000; // Address of DR cache |
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const uint32 DR_CACHE_SIZE = 0x80000; // Size of DR Cache |
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const uintptr KERNEL_DATA_BASE = 0x68ffe000; // Address of Kernel Data |
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const uintptr KERNEL_DATA2_BASE = 0x5fffe000; // Alternate address of Kernel Data |
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const uint32 KERNEL_AREA_SIZE = 0x2000; // Size of Kernel Data area |
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// MacOS 68k Emulator Data |
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struct EmulatorData { |
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uint32 v[0x400]; |
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}; |
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// MacOS Kernel Data |
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struct KernelData { |
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uint32 v[0x400]; |
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EmulatorData ed; |
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}; |
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// RAM and ROM pointers (allocated and set by main_*.cpp) |
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extern uint32 RAMBase; // Base address of Mac RAM |
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extern uint32 RAMSize; // Size address of Mac RAM |
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extern uint8 *RAMBaseHost; // Base address of Mac RAM (host address space) |
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extern uint32 ROMBase; // Base address of Mac ROM |
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extern uint8 *ROMBaseHost; // Base address of Mac ROM (host address space) |
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// Mac memory access functions |
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#if EMULATED_PPC |
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#include "cpu/vm.hpp" |
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static inline uint32 ReadMacInt8(uint32 addr) {return vm_read_memory_1(addr);} |
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static inline void WriteMacInt8(uint32 addr, uint32 v) {vm_write_memory_1(addr, v);} |
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static inline uint32 ReadMacInt16(uint32 addr) {return vm_read_memory_2(addr);} |
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static inline void WriteMacInt16(uint32 addr, uint32 v) {vm_write_memory_2(addr, v);} |
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static inline uint32 ReadMacInt32(uint32 addr) {return vm_read_memory_4(addr);} |
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static inline void WriteMacInt32(uint32 addr, uint32 v) {vm_write_memory_4(addr, v);} |
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static inline uint64 ReadMacInt64(uint32 addr) {return vm_read_memory_8(addr);} |
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static inline void WriteMacInt64(uint32 addr, uint64 v) {vm_write_memory_8(addr, v);} |
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static inline uint32 Host2MacAddr(uint8 *addr) {return vm_do_get_virtual_address(addr);} |
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static inline uint8 *Mac2HostAddr(uint32 addr) {return vm_do_get_real_address(addr);} |
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static inline void *Mac_memset(uint32 addr, int c, size_t n) {return vm_memset(addr, c, n);} |
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static inline void *Mac2Host_memcpy(void *dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);} |
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static inline void *Host2Mac_memcpy(uint32 dest, const void *src, size_t n) {return vm_memcpy(dest, src, n);} |
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static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);} |
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#else |
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static inline uint32 ReadMacInt8(uint32 addr) {return *(uint8 *)addr;} |
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static inline void WriteMacInt8(uint32 addr, uint32 b) {*(uint8 *)addr = b;} |
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#ifdef __i386__ |
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static inline uint32 ReadMacInt16(uint32 addr) {uint32 retval; __asm__ ("movzwl %w1,%k0\n\tshll $16,%k0\n\tbswapl %k0\n" : "=&r" (retval) : "m" (*(uint16 *)addr) : "cc"); return retval;} |
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static inline uint32 ReadMacInt32(uint32 addr) {uint32 retval; __asm__ ("bswap %0" : "=r" (retval) : "0" (*(uint32 *)addr) : "cc"); return retval;} |
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static inline uint64 ReadMacInt64(uint32 addr) {return ((uint64)ReadMacInt32(addr) << 32) | ReadMacInt32(addr + 4);} |
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static inline void WriteMacInt16(uint32 addr, uint32 w) {__asm__ ("bswapl %0" : "=&r" (w) : "0" (w << 16) : "cc"); *(uint16 *)addr = w;} |
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static inline void WriteMacInt32(uint32 addr, uint32 l) {__asm__ ("bswap %0" : "=r" (l) : "0" (l) : "cc"); *(uint32 *)addr = l;} |
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static inline void WriteMacInt64(uint32 addr, uint64 ll) {WriteMacInt32(addr, ll >> 32); WriteMacInt32(addr, ll);} |
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#else |
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static inline uint32 ReadMacInt16(uint32 addr) {return *(uint16 *)addr;} |
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static inline uint32 ReadMacInt32(uint32 addr) {return *(uint32 *)addr;} |
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static inline uint64 ReadMacInt64(uint32 addr) {return *(uint64 *)addr;} |
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static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = w;} |
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static inline void WriteMacInt32(uint32 addr, uint32 l) {*(uint32 *)addr = l;} |
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static inline void WriteMacInt64(uint32 addr, uint64 ll) {*(uint64 *)addr = ll;} |
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#endif |
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static inline uint32 Host2MacAddr(uint8 *addr) {return (uint32)addr;} |
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static inline uint8 *Mac2HostAddr(uint32 addr) {return (uint8 *)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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#endif |
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/* |
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* 680x0 and PPC emulation |
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*/ |
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// 68k procedure helper to write a big endian 16-bit word |
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#ifdef WORDS_BIGENDIAN |
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#define PW(W) W |
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#else |
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#define PW(X) ((((X) >> 8) & 0xff) | (((X) & 0xff) << 8)) |
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#endif |
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// PowerPC procedure helper to write a big-endian 32-bit word |
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#ifdef WORDS_BIGENDIAN |
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#define PL(X) X |
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#else |
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#define PL(X) \ |
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((((X) & 0xff000000) >> 24) | (((X) & 0x00ff0000) >> 8) | \ |
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(((X) & 0x0000ff00) << 8) | (((X) & 0x000000ff) << 24)) |
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#endif |
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struct M68kRegisters; |
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extern void Execute68k(uint32, M68kRegisters *r); // Execute 68k subroutine from EMUL_OP routine, must be ended with RTS |
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extern void Execute68kTrap(uint16 trap, M68kRegisters *r); // Execute 68k A-Trap from EMUL_OP routine |
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extern void ExecutePPC(void (*func)()); // Execute PPC code from EMUL_OP routine (real mode switch) |
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#if EMULATED_PPC |
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extern void FlushCodeCache(uintptr start, uintptr end); // Invalidate emulator caches |
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#endif |
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extern void ExecuteNative(int selector); // Execute native code from EMUL_OP routine (real mode switch) |
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#endif |
