src/include/cpu_emulation.h

/*
 *  cpu_emulation.h - Definitions for CPU emulation and Mac memory access
 *
 *  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
 *
 *  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
 */

// Constants
const uintptr ROM_BASE = 0x40800000;                    // Base address of ROM
const uint32  ROM_SIZE = 0x400000;                              // Size of ROM file
const uint32  ROM_AREA_SIZE = 0x500000;                 // Size of ROM area
const uintptr ROM_END = ROM_BASE + ROM_SIZE;    // End of ROM
const uintptr DR_EMULATOR_BASE = 0x68070000;    // Address of DR emulator code
const uint32  DR_EMULATOR_SIZE = 0x10000;               // Size of DR emulator code
const uintptr DR_CACHE_BASE = 0x69000000;               // Address of DR cache
const uint32  DR_CACHE_SIZE = 0x80000;                  // Size of DR Cache

const uintptr KERNEL_DATA_BASE = 0x68ffe000;    // Address of Kernel Data
const uintptr KERNEL_DATA2_BASE = 0x5fffe000;   // Alternate address of Kernel Data
const uint32  KERNEL_AREA_SIZE = 0x2000;                // Size of Kernel Data area

// MacOS 68k Emulator Data
struct EmulatorData {
        uint32  v[0x400];
};

// MacOS Kernel Data
struct KernelData {
        uint32  v[0x400];
        EmulatorData ed;
};

// RAM and ROM pointers (allocated and set by main_*.cpp)
extern uint32 RAMBase;                  // Base address of Mac RAM
extern uint32 RAMSize;                  // Size address of Mac RAM
extern uint8 *RAMBaseHost;              // Base address of Mac RAM (host address space)
extern uint8 *ROMBaseHost;              // Base address of Mac ROM (host address space)

// Mac memory access functions
#if EMULATED_PPC
#include "cpu/vm.hpp"
static inline uint32 ReadMacInt8(uint32 addr) {return vm_read_memory_1(addr);}
static inline void WriteMacInt8(uint32 addr, uint32 v) {vm_write_memory_1(addr, v);}
static inline uint32 ReadMacInt16(uint32 addr) {return vm_read_memory_2(addr);}
static inline void WriteMacInt16(uint32 addr, uint32 v) {vm_write_memory_2(addr, v);}
static inline uint32 ReadMacInt32(uint32 addr) {return vm_read_memory_4(addr);}
static inline void WriteMacInt32(uint32 addr, uint32 v) {vm_write_memory_4(addr, v);}
static inline uint64 ReadMacInt64(uint32 addr) {return vm_read_memory_8(addr);}
static inline void WriteMacInt64(uint32 addr, uint64 v) {vm_write_memory_8(addr, v);}
static inline uint32 Host2MacAddr(uint8 *addr) {return vm_do_get_virtual_address(addr);}
static inline uint8 *Mac2HostAddr(uint32 addr) {return vm_do_get_real_address(addr);}
static inline void *Mac_memset(uint32 addr, int c, size_t n) {return vm_memset(addr, c, n);}
static inline void *Mac2Host_memcpy(void *dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);}
static inline void *Host2Mac_memcpy(uint32 dest, const void *src, size_t n) {return vm_memcpy(dest, src, n);}
static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);}
#else
static inline uint32 ReadMacInt8(uint32 addr) {return *(uint8 *)addr;}
static inline void WriteMacInt8(uint32 addr, uint32 b) {*(uint8 *)addr = b;}
static inline uint32 ReadMacInt16(uint32 addr) {return *(uint16 *)addr;}
static inline uint32 ReadMacInt32(uint32 addr) {return *(uint32 *)addr;}
static inline uint64 ReadMacInt64(uint32 addr) {return *(uint64 *)addr;}
static inline void WriteMacInt16(uint32 addr, uint32 w) {*(uint16 *)addr = w;}
static inline void WriteMacInt32(uint32 addr, uint32 l) {*(uint32 *)addr = l;}
static inline void WriteMacInt64(uint32 addr, uint64 ll) {*(uint64 *)addr = ll;}
static inline uint32 Host2MacAddr(uint8 *addr) {return (uint32)addr;}
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);}
#endif


/*
 *  680x0 and PPC emulation
 */

// 68k procedure helper to write a big endian 16-bit word
#ifdef WORDS_BIGENDIAN
#define PW(W) W
#else
#define PW(X) ((((X) >> 8) & 0xff) | (((X) & 0xff) << 8))
#endif

// PowerPC procedure helper to write a big-endian 32-bit word
#ifdef WORDS_BIGENDIAN
#define PL(X) X
#else
#define PL(X)                                                                                                   \
     ((((X) & 0xff000000) >> 24) | (((X) & 0x00ff0000) >>  8) | \
      (((X) & 0x0000ff00) <<  8) | (((X) & 0x000000ff) << 24))
#endif

struct M68kRegisters;
extern void Execute68k(uint32, M68kRegisters *r);                       // Execute 68k subroutine from EMUL_OP routine, must be ended with RTS
extern void Execute68kTrap(uint16 trap, M68kRegisters *r);      // Execute 68k A-Trap from EMUL_OP routine
#if EMULATED_PPC
extern void FlushCodeCache(uintptr start, uintptr end);         // Invalidate emulator caches
#endif
extern void ExecuteNative(int selector);                                        // Execute native code from EMUL_OP routine (real mode switch)

#endif
Revision:	1.14
Committed:	2004-11-13T14:09:16Z (19 years, 7 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.13:	+2 -0 lines
Log Message:	Implement Direct Addressing mode similarly to Basilisk II. This is to get SheepShaver working on OSes that don't support maipping of Low Memory globals at 0x00000000, e.g. Windows.
#	Content
1	/*
2	* cpu_emulation.h - Definitions for CPU emulation and Mac memory access
3	*
4	* SheepShaver (C) 1997-2004 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 uintptr ROM_BASE = 0x40800000; // Base address of ROM
31	const uint32 ROM_SIZE = 0x400000; // Size of ROM file
32	const uint32 ROM_AREA_SIZE = 0x500000; // Size of ROM area
33	const uintptr ROM_END = ROM_BASE + ROM_SIZE; // End of ROM
34	const uintptr DR_EMULATOR_BASE = 0x68070000; // Address of DR emulator code
35	const uint32 DR_EMULATOR_SIZE = 0x10000; // Size of DR emulator code
36	const uintptr DR_CACHE_BASE = 0x69000000; // Address of DR cache
37	const uint32 DR_CACHE_SIZE = 0x80000; // Size of DR Cache
38
39	const uintptr KERNEL_DATA_BASE = 0x68ffe000; // Address of Kernel Data
40	const uintptr KERNEL_DATA2_BASE = 0x5fffe000; // Alternate address of Kernel Data
41	const uint32 KERNEL_AREA_SIZE = 0x2000; // Size of Kernel Data area
42
43	// MacOS 68k Emulator Data
44	struct EmulatorData {
45	uint32 v[0x400];
46	};
47
48	// MacOS Kernel Data
49	struct KernelData {
50	uint32 v[0x400];
51	EmulatorData ed;
52	};
53
54	// RAM and ROM pointers (allocated and set by main_*.cpp)
55	extern uint32 RAMBase; // Base address of Mac RAM
56	extern uint32 RAMSize; // Size address of Mac RAM
57	extern uint8 *RAMBaseHost; // Base address of Mac RAM (host address space)
58	extern uint8 *ROMBaseHost; // Base address of Mac ROM (host address space)
59
60	// Mac memory access functions
61	#if EMULATED_PPC
62	#include "cpu/vm.hpp"
63	static inline uint32 ReadMacInt8(uint32 addr) {return vm_read_memory_1(addr);}
64	static inline void WriteMacInt8(uint32 addr, uint32 v) {vm_write_memory_1(addr, v);}
65	static inline uint32 ReadMacInt16(uint32 addr) {return vm_read_memory_2(addr);}
66	static inline void WriteMacInt16(uint32 addr, uint32 v) {vm_write_memory_2(addr, v);}
67	static inline uint32 ReadMacInt32(uint32 addr) {return vm_read_memory_4(addr);}
68	static inline void WriteMacInt32(uint32 addr, uint32 v) {vm_write_memory_4(addr, v);}
69	static inline uint64 ReadMacInt64(uint32 addr) {return vm_read_memory_8(addr);}
70	static inline void WriteMacInt64(uint32 addr, uint64 v) {vm_write_memory_8(addr, v);}
71	static inline uint32 Host2MacAddr(uint8 *addr) {return vm_do_get_virtual_address(addr);}
72	static inline uint8 *Mac2HostAddr(uint32 addr) {return vm_do_get_real_address(addr);}
73	static inline void *Mac_memset(uint32 addr, int c, size_t n) {return vm_memset(addr, c, n);}
74	static inline void Mac2Host_memcpy(void dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);}
75	static inline void Host2Mac_memcpy(uint32 dest, const void src, size_t n) {return vm_memcpy(dest, src, n);}
76	static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return vm_memcpy(dest, src, n);}
77	#else
78	static inline uint32 ReadMacInt8(uint32 addr) {return (uint8 )addr;}
79	static inline void WriteMacInt8(uint32 addr, uint32 b) {(uint8 )addr = b;}
80	static inline uint32 ReadMacInt16(uint32 addr) {return (uint16 )addr;}
81	static inline uint32 ReadMacInt32(uint32 addr) {return (uint32 )addr;}
82	static inline uint64 ReadMacInt64(uint32 addr) {return (uint64 )addr;}
83	static inline void WriteMacInt16(uint32 addr, uint32 w) {(uint16 )addr = w;}
84	static inline void WriteMacInt32(uint32 addr, uint32 l) {(uint32 )addr = l;}
85	static inline void WriteMacInt64(uint32 addr, uint64 ll) {(uint64 )addr = ll;}
86	static inline uint32 Host2MacAddr(uint8 *addr) {return (uint32)addr;}
87	static inline uint8 Mac2HostAddr(uint32 addr) {return (uint8 )addr;}
88	static inline void *Mac_memset(uint32 addr, int c, size_t n) {return memset(Mac2HostAddr(addr), c, n);}
89	static inline void Mac2Host_memcpy(void dest, uint32 src, size_t n) {return memcpy(dest, Mac2HostAddr(src), n);}
90	static inline void Host2Mac_memcpy(uint32 dest, const void src, size_t n) {return memcpy(Mac2HostAddr(dest), src, n);}
91	static inline void *Mac2Mac_memcpy(uint32 dest, uint32 src, size_t n) {return memcpy(Mac2HostAddr(dest), Mac2HostAddr(src), n);}
92	#endif
93
94
95	/*
96	* 680x0 and PPC emulation
97	*/
98
99	// 68k procedure helper to write a big endian 16-bit word
100	#ifdef WORDS_BIGENDIAN
101	#define PW(W) W
102	#else
103	#define PW(X) ((((X) >> 8) & 0xff) \| (((X) & 0xff) << 8))
104	#endif
105
106	// PowerPC procedure helper to write a big-endian 32-bit word
107	#ifdef WORDS_BIGENDIAN
108	#define PL(X) X
109	#else
110	#define PL(X) \
111	((((X) & 0xff000000) >> 24) \| (((X) & 0x00ff0000) >> 8) \| \
112	(((X) & 0x0000ff00) << 8) \| (((X) & 0x000000ff) << 24))
113	#endif
114
115	struct M68kRegisters;
116	extern void Execute68k(uint32, M68kRegisters *r); // Execute 68k subroutine from EMUL_OP routine, must be ended with RTS
117	extern void Execute68kTrap(uint16 trap, M68kRegisters *r); // Execute 68k A-Trap from EMUL_OP routine
118	#if EMULATED_PPC
119	extern void FlushCodeCache(uintptr start, uintptr end); // Invalidate emulator caches
120	#endif
121	extern void ExecuteNative(int selector); // Execute native code from EMUL_OP routine (real mode switch)
122
123	#endif