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cebix 2000-07-22 16:55:15 +00:00
parent ae4a8d0439
commit f79edf9e90
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BasiliskII/src/AmigaOS/cpu_emulation.h
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/*
* cpu_emulation.h - Definitions for Basilisk II CPU emulation module (AmigaOS native 68k version)
*
* Basilisk II (C) 1997-2000 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
/*
* 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
// Mac memory access functions
static inline uint32 ReadMacInt32(uint32 addr) {return ntohl(*(uint32 *)addr);}
static inline uint32 ReadMacInt16(uint32 addr) {return ntohs(*(uint16 *)addr);}
static inline uint32 ReadMacInt8(uint32 addr) {return *(uint8 *)addr;}
static inline void WriteMacInt32(uint32 addr, uint32 l) {*(uint32 *)addr = htonl(l);}
static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = htons(w);}
static inline void WriteMacInt8(uint32 addr, uint32 b) {*(uint8 *)addr = b;}
static inline uint8 *Mac2HostAddr(uint32 addr) {return (uint8 *)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
*/
// 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 (InterruptFlag must be set first)
#endif