| 1 |
/* |
| 2 |
* cpu_emulation.h - Definitions for CPU emulation and Mac memory access |
| 3 |
* |
| 4 |
* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#ifndef CPU_EMULATION_H |
| 22 |
#define CPU_EMULATION_H |
| 23 |
|
| 24 |
|
| 25 |
/* |
| 26 |
* Memory system |
| 27 |
*/ |
| 28 |
|
| 29 |
// Constants |
| 30 |
const uint32 ROM_BASE = 0x40800000; // Base address of ROM |
| 31 |
const uint32 ROM_SIZE = 0x00400000; // Size of ROM file |
| 32 |
const uint32 DR_CACHE_BASE = 0x69000000; // Address of DR cache |
| 33 |
const uint32 DR_CACHE_SIZE = 0x80000; // Size of DR Cache |
| 34 |
|
| 35 |
// RAM and ROM pointers (allocated and set by main_*.cpp) |
| 36 |
extern uint32 RAMBase; // Base address of Mac RAM |
| 37 |
extern uint32 RAMSize; // Size address of Mac RAM |
| 38 |
|
| 39 |
// Mac memory access functions |
| 40 |
static inline uint32 ReadMacInt8(uint32 addr) {return *(uint8 *)addr;} |
| 41 |
static inline void WriteMacInt8(uint32 addr, uint32 b) {*(uint8 *)addr = b;} |
| 42 |
#ifdef __i386__ |
| 43 |
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;} |
| 44 |
static inline uint32 ReadMacInt32(uint32 addr) {uint32 retval; __asm__ ("bswap %0" : "=r" (retval) : "0" (*(uint32 *)addr) : "cc"); return retval;} |
| 45 |
static inline uint64 ReadMacInt64(uint32 addr) {return ((uint64)ReadMacInt32(addr) << 32) | ReadMacInt32(addr + 4);} |
| 46 |
static inline void WriteMacInt16(uint32 addr, uint32 w) {__asm__ ("bswapl %0" : "=&r" (w) : "0" (w << 16) : "cc"); *(uint16 *)addr = w;} |
| 47 |
static inline void WriteMacInt32(uint32 addr, uint32 l) {__asm__ ("bswap %0" : "=r" (l) : "0" (l) : "cc"); *(uint32 *)addr = l;} |
| 48 |
static inline void WriteMacInt64(uint32 addr, uint64 ll) {WriteMacInt32(addr, ll >> 32); WriteMacInt32(addr, ll);} |
| 49 |
#else |
| 50 |
static inline uint32 ReadMacInt16(uint32 addr) {return *(uint16 *)addr;} |
| 51 |
static inline uint32 ReadMacInt32(uint32 addr) {return *(uint32 *)addr;} |
| 52 |
static inline uint64 ReadMacInt64(uint32 addr) {return *(uint64 *)addr;} |
| 53 |
static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = w;} |
| 54 |
static inline void WriteMacInt32(uint32 addr, uint32 l) {*(uint32 *)addr = l;} |
| 55 |
static inline void WriteMacInt64(uint32 addr, uint64 ll) {*(uint64 *)addr = ll;} |
| 56 |
#endif |
| 57 |
static inline uint8 *Mac2HostAddr(uint32 addr) {return (uint8 *)addr;} |
| 58 |
static inline void *Mac_memset(uint32 addr, int c, size_t n) {return memset(Mac2HostAddr(addr), c, n);} |
| 59 |
static inline void *Mac2Host_memcpy(void *dest, uint32 src, size_t n) {return memcpy(dest, Mac2HostAddr(src), n);} |
| 60 |
static inline void *Host2Mac_memcpy(uint32 dest, const void *src, size_t n) {return memcpy(Mac2HostAddr(dest), src, n);} |
| 61 |
static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return memcpy(Mac2HostAddr(dest), Mac2HostAddr(src), n);} |
| 62 |
|
| 63 |
|
| 64 |
/* |
| 65 |
* 680x0 and PPC emulation |
| 66 |
*/ |
| 67 |
|
| 68 |
struct M68kRegisters; |
| 69 |
extern void Execute68k(uint32, M68kRegisters *r); // Execute 68k subroutine from EMUL_OP routine, must be ended with RTS |
| 70 |
extern void Execute68kTrap(uint16 trap, M68kRegisters *r); // Execute 68k A-Trap from EMUL_OP routine |
| 71 |
extern void ExecutePPC(void (*func)()); // Execute PPC code from EMUL_OP routine (real mode switch) |
| 72 |
|
| 73 |
#endif |
