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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) 1997-2004 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 ROM_AREA_SIZE = 0x500000; // Size of ROM area |
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const uint32 ROM_END = ROM_BASE + ROM_SIZE; // End of ROM |
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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 SHEEP_BASE = 0x60000000; // Address of SheepShaver data |
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const uint32 SHEEP_SIZE = 0x40000; // Size of SheepShaver data |
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const uint32 KERNEL_DATA_BASE = 0x68ffe000; // Address of Kernel Data |
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const uint32 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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const uintptr ROM_BASE = 0x40800000; // Base address of ROM |
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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 ROM_END = ROM_BASE + ROM_SIZE; // End of ROM |
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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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// 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 uint32 SheepStack1Base; // SheepShaver first alternate stack base |
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extern uint32 SheepStack2Base; // SheepShaver second alternate stack base |
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extern uint32 SheepThunksBase; // SheepShaver thunks base |
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// Mac memory access functions |
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#if EMULATED_PPC |
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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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#if EMULATED_PPC |
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extern void FlushCodeCache(uintptr start, uintptr end); // Invalidate emulator caches |
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extern void ExecuteNative(int selector); // Execute native code from EMUL_OP routine (real mode switch) |
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#else |
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extern void ExecutePPC(void (*func)(void)); // Execute PPC code from EMUL_OP routine (real mode switch) |
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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 |
