home *** CD-ROM | disk | FTP | other *** search
- /*
- * cpu_emulation.h - Definitions for Basilisk II CPU emulation module (UAE 0.8.10 version)
- *
- * Basilisk II (C) 1997-2001 Christian Bauer
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
- #ifndef CPU_EMULATION_H
- #define CPU_EMULATION_H
-
- #include <string.h>
-
-
- /*
- * Memory system
- */
-
- // RAM and ROM pointers (allocated and set by main_*.cpp)
- extern uint32 RAMBaseMac; // RAM base (Mac address space), does not include Low Mem when != 0
- extern uint8 *RAMBaseHost; // RAM base (host address space)
- extern uint32 RAMSize; // Size of RAM
-
- extern uint32 ROMBaseMac; // ROM base (Mac address space)
- extern uint8 *ROMBaseHost; // ROM base (host address space)
- extern uint32 ROMSize; // Size of ROM
-
- #if !REAL_ADDRESSING
- // If we are not using real addressing, the Mac frame buffer gets mapped to this location
- // The memory must be allocated by VideoInit(). If multiple monitors are used, they must
- // share the frame buffer
- const uint32 MacFrameBaseMac = 0xa0000000;
- extern uint8 *MacFrameBaseHost; // Frame buffer base (host address space)
- extern uint32 MacFrameSize; // Size of frame buffer
- #endif
- extern int MacFrameLayout; // Frame buffer layout (see defines below)
-
- // Possible frame buffer layouts
- enum {
- FLAYOUT_NONE, // No frame buffer
- FLAYOUT_DIRECT, // Frame buffer is in MacOS layout, no conversion needed
- FLAYOUT_HOST_555, // 16 bit, RGB 555, host byte order
- FLAYOUT_HOST_565, // 16 bit, RGB 565, host byte order
- FLAYOUT_HOST_888 // 32 bit, RGB 888, host byte order
- };
-
- // Mac memory access functions
- #include "memory.h"
- static inline uint32 ReadMacInt32(uint32 addr) {return get_long(addr);}
- static inline uint32 ReadMacInt16(uint32 addr) {return get_word(addr);}
- static inline uint32 ReadMacInt8(uint32 addr) {return get_byte(addr);}
- static inline void WriteMacInt32(uint32 addr, uint32 l) {put_long(addr, l);}
- static inline void WriteMacInt16(uint32 addr, uint32 w) {put_word(addr, w);}
- static inline void WriteMacInt8(uint32 addr, uint32 b) {put_byte(addr, b);}
- static inline uint8 *Mac2HostAddr(uint32 addr) {return get_real_address(addr);}
- static inline uint32 Host2MacAddr(uint8 *addr) {return get_virtual_address(addr);}
-
- static inline void *Mac_memset(uint32 addr, int c, size_t n) {return memset(Mac2HostAddr(addr), c, n);}
- static inline void *Mac2Host_memcpy(void *dest, uint32 src, size_t n) {return memcpy(dest, Mac2HostAddr(src), n);}
- static inline void *Host2Mac_memcpy(uint32 dest, const void *src, size_t n) {return memcpy(Mac2HostAddr(dest), src, n);}
- static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return memcpy(Mac2HostAddr(dest), Mac2HostAddr(src), n);}
-
-
- /*
- * 680x0 emulation
- */
-
- // Initialization
- extern bool Init680x0(void); // This routine may want to look at CPUType/FPUType to set up the apropriate emulation
- extern void Exit680x0(void);
-
- // 680x0 emulation functions
- struct M68kRegisters;
- extern void Start680x0(void); // Reset and start 680x0
- extern "C" void Execute68k(uint32 addr, M68kRegisters *r); // Execute 68k code from EMUL_OP routine
- extern "C" void Execute68kTrap(uint16 trap, M68kRegisters *r); // Execute MacOS 68k trap from EMUL_OP routine
-
- // Interrupt functions
- extern void TriggerInterrupt(void); // Trigger interrupt level 1 (InterruptFlag must be set first)
- extern void TriggerNMI(void); // Trigger interrupt level 7
-
- #endif
-