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cebix |
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/* |
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* cpu_emulation.h - Definitions for Basilisk II CPU emulation module (UAE 0.8.8 version) |
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* |
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* Basilisk II (C) 1997-1999 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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#if !REAL_ADDRESSING |
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// If we are not using real addressing, the Mac frame buffer gets mapped to this location |
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// The memory must be allocated by VideoInit(). If multiple monitors are used, they must |
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// share the frame buffer |
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const uint32 MacFrameBaseMac = 0xa0000000; |
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extern uint8 *MacFrameBaseHost; // Frame buffer base (host address space) |
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extern uint32 MacFrameSize; // Size of frame buffer |
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extern int MacFrameLayout; // Frame buffer layout (see defines below) |
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#endif |
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// Possible frame buffer layouts |
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enum { |
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FLAYOUT_NONE, // No frame buffer |
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FLAYOUT_DIRECT, // Frame buffer is in MacOS layout, no conversion needed |
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FLAYOUT_HOST_555, // 16 bit, RGB 555, host byte order |
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FLAYOUT_HOST_565, // 16 bit, RGB 565, host byte order |
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FLAYOUT_HOST_888 // 32 bit, RGB 888, host byte order |
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}; |
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// Mac memory access functions |
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#if REAL_ADDRESSING |
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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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#else |
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#include "memory.h" |
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static inline uint32 ReadMacInt32(uint32 addr) {return get_long(addr);} |
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static inline uint32 ReadMacInt16(uint32 addr) {return get_word(addr);} |
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static inline uint32 ReadMacInt8(uint32 addr) {return get_byte(addr);} |
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static inline void WriteMacInt32(uint32 addr, uint32 l) {put_long(addr, l);} |
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static inline void WriteMacInt16(uint32 addr, uint32 w) {put_word(addr, w);} |
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static inline void WriteMacInt8(uint32 addr, uint32 b) {put_byte(addr, b);} |
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static inline uint8 *Mac2HostAddr(uint32 addr) {return get_real_address(addr);} |
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#endif |
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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 level 1 (InterruptFlag must be set first) |
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#endif |
