src/MacOSX/main_macosx.mm

/*
 *  $Id: main_macosx.mm,v 1.3 2002/10/29 14:27:00 nigel Exp $
 *
 *  main_macosx.mm -    Startup code for MacOS X
 *                                              Based (in a small way) on the default main.m,
                                                and on Basilisk's main_unix.cpp
 *
 *  Basilisk II (C) 1997-2002 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
 */
#define PTHREADS
#include "sysdeps.h"

#ifdef HAVE_PTHREADS
# include <pthread.h>
#endif

#if REAL_ADDRESSING || DIRECT_ADDRESSING
# include <sys/mman.h>
#endif

#include "cpu_emulation.h"
#include "macos_util_macosx.h"
#include "main.h"
#include "prefs.h"
#include "prefs_editor.h"
#include "rom_patches.h"
#include "sys.h"
#include "timer.h"
#include "user_strings.h"
#include "version.h"
#include "video.h"
#include "vm_alloc.h"
#include "xpram.h"

#ifdef ENABLE_MON
# include "mon.h"
#endif

#define DEBUG 0
#include "debug.h"


#import <AppKit/AppKit.h>

#include "main_macosx.h"                // To bridge between main() and misc. classes


// Constants
const char ROM_FILE_NAME[] = "ROM";
const int SIG_STACK_SIZE = SIGSTKSZ;    // Size of signal stack
const int SCRATCH_MEM_SIZE = 0x10000;   // Size of scratch memory area


// CPU and FPU type, addressing mode
int CPUType;
bool CPUIs68060;
int FPUType;
bool TwentyFourBitAddressing;


// Global variables

#ifdef HAVE_PTHREADS

static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER;        // Mutex to protect InterruptFlags
#define LOCK_INTFLAGS pthread_mutex_lock(&intflag_lock)
#define UNLOCK_INTFLAGS pthread_mutex_unlock(&intflag_lock)

#else

#define LOCK_INTFLAGS
#define UNLOCK_INTFLAGS

#endif

#if USE_SCRATCHMEM_SUBTERFUGE
uint8 *ScratchMem = NULL;                       // Scratch memory for Mac ROM writes
#endif

#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
#define SIG_TIMER SIGRTMIN
static timer_t timer;                           // 60Hz timer
#endif

#ifdef ENABLE_MON
static struct sigaction sigint_sa;      // sigaction for SIGINT handler
static void sigint_handler(...);
#endif

#if REAL_ADDRESSING
static bool lm_area_mapped = false;     // Flag: Low Memory area mmap()ped
#endif


/*
 *  Main program
 */

static void usage(const char *prg_name)
{
        printf("Usage: %s [OPTION...]\n", prg_name);
        printf("\nUnix options:\n");
        printf("  --help\n    display this usage message\n");
        printf("  --break ADDRESS\n    set ROM breakpoint\n");
        printf("  --rominfo\n    dump ROM information\n");
        PrefsPrintUsage();
        exit(0);
}

int main(int argc, char **argv)
{
        // Initialize variables
        RAMBaseHost = NULL;
        ROMBaseHost = NULL;
        srand(time(NULL));
        tzset();

        // Print some info
        printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
        printf(" %s\n", GetString(STR_ABOUT_TEXT2));

        // Read preferences
        PrefsInit(argc, argv);

        // Parse command line arguments
        for (int i=1; i<argc; i++) {
                if (strcmp(argv[i], "--help") == 0) {
                        usage(argv[0]);
                } else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
                        i++;
                } else if (strcmp(argv[i], "--break") == 0) {
                        i++;
                        if (i < argc)
                                ROMBreakpoint = strtol(argv[i], NULL, 0);
                } else if (strcmp(argv[i], "--rominfo") == 0) {
                        PrintROMInfo = true;
                } else if (argv[i][0] == '-') {
                        fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
                        usage(argv[0]);
                }
        }

        // Init system routines
        SysInit();

        // Open display, attach to window server,
        // load pre-instantiated classes from MainMenu.nib, start run loop
        int i = NSApplicationMain(argc, (const char **)argv);
        // We currently never get past here, because QuitEmulator() does an exit()

        // Exit system routines
        SysExit();

        // Exit preferences
        PrefsExit();

        return i;
}

#define QuitEmulator()  QuitEmuNoExit() ; return NO;

bool InitEmulator (void)
{
        char str[256];


        // Read RAM size
        RAMSize = PrefsFindInt32("ramsize") & 0xfff00000;       // Round down to 1MB boundary
        if (RAMSize < 1024*1024) {
                WarningAlert(GetString(STR_SMALL_RAM_WARN));
                RAMSize = 1024*1024;
        }

#if REAL_ADDRESSING || DIRECT_ADDRESSING
        RAMSize = RAMSize & -getpagesize();                                     // Round down to page boundary
#endif
        
        // Initialize VM system
        vm_init();

#if REAL_ADDRESSING
        // Flag: RAM and ROM are contigously allocated from address 0
        bool memory_mapped_from_zero = false;
        
        // Under Solaris/SPARC and NetBSD/m68k, Basilisk II is known to crash
        // when trying to map a too big chunk of memory starting at address 0
#if defined(OS_solaris) || defined(OS_netbsd)
        const bool can_map_all_memory = false;
#else
        const bool can_map_all_memory = true;
#endif
        
        // Try to allocate all memory from 0x0000, if it is not known to crash
        if (can_map_all_memory && (vm_acquire_fixed(0, RAMSize + 0x100000) == 0)) {
                D(bug("Could allocate RAM and ROM from 0x0000\n"));
                memory_mapped_from_zero = true;
        }
        
        // Otherwise, just create the Low Memory area (0x0000..0x2000)
        else if (vm_acquire_fixed(0, 0x2000) == 0) {
                D(bug("Could allocate the Low Memory globals\n"));
                lm_area_mapped = true;
        }
        
        // Exit on failure
        else {
                sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
                ErrorAlert(str);
                QuitEmulator();
        }
#else
        *str = 0;               // Eliminate unused variable warning
#endif

        // Create areas for Mac RAM and ROM
#if REAL_ADDRESSING
        if (memory_mapped_from_zero) {
                RAMBaseHost = (uint8 *)0;
                ROMBaseHost = RAMBaseHost + RAMSize;
        }
        else
#endif
        {
                RAMBaseHost = (uint8 *)vm_acquire(RAMSize);
                ROMBaseHost = (uint8 *)vm_acquire(0x100000);
                if (RAMBaseHost == VM_MAP_FAILED || ROMBaseHost == VM_MAP_FAILED) {
                        ErrorAlert(STR_NO_MEM_ERR);
                        QuitEmulator();
                }
        }

#if USE_SCRATCHMEM_SUBTERFUGE
        // Allocate scratch memory
        ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
        if (ScratchMem == VM_MAP_FAILED) {
                ErrorAlert(STR_NO_MEM_ERR);
                QuitEmulator();
        }
        ScratchMem += SCRATCH_MEM_SIZE/2;       // ScratchMem points to middle of block
#endif

#if DIRECT_ADDRESSING
        // RAMBaseMac shall always be zero
        MEMBaseDiff = (uintptr)RAMBaseHost;
        RAMBaseMac = 0;
        ROMBaseMac = Host2MacAddr(ROMBaseHost);
#endif
#if REAL_ADDRESSING
        RAMBaseMac = (uint32)RAMBaseHost;
        ROMBaseMac = (uint32)ROMBaseHost;
#endif
        D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
        D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
        
        // Get rom file path from preferences
        const char *rom_path = PrefsFindString("rom");

        // Load Mac ROM
        int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
        if (rom_fd < 0) {
                ErrorAlert(STR_NO_ROM_FILE_ERR);
                QuitEmulator();
        }
        printf(GetString(STR_READING_ROM_FILE));
        ROMSize = lseek(rom_fd, 0, SEEK_END);
        if (ROMSize != 64*1024 && ROMSize != 128*1024 && ROMSize != 256*1024 && ROMSize != 512*1024 && ROMSize != 1024*1024) {
                ErrorAlert(STR_ROM_SIZE_ERR);
                close(rom_fd);
                QuitEmulator();
        }
        lseek(rom_fd, 0, SEEK_SET);
        if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
                ErrorAlert(STR_ROM_FILE_READ_ERR);
                close(rom_fd);
                QuitEmulator();
        }


        // Initialize everything
        if (!InitAll())
                QuitEmulator();
        D(bug("Initialization complete\n"));


#ifdef ENABLE_MON
        // Setup SIGINT handler to enter mon
        sigemptyset(&sigint_sa.sa_mask);
        sigint_sa.sa_handler = (void (*)(int))sigint_handler;
        sigint_sa.sa_flags = 0;
        sigaction(SIGINT, &sigint_sa, NULL);
#endif


        return YES;
}

#undef QuitEmulator()


/*
 *  Quit emulator
 */

void QuitEmuNoExit()
{
        extern  NSApplication *NSApp;


        D(bug("QuitEmulator\n"));

        // Exit 680x0 emulation
        Exit680x0();

        // Deinitialize everything
        ExitAll();

        // Free ROM/RAM areas
        if (RAMBaseHost != VM_MAP_FAILED) {
                vm_release(RAMBaseHost, RAMSize);
                RAMBaseHost = NULL;
        }
        if (ROMBaseHost != VM_MAP_FAILED) {
                vm_release(ROMBaseHost, 0x100000);
                ROMBaseHost = NULL;
        }

#if USE_SCRATCHMEM_SUBTERFUGE
        // Delete scratch memory area
        if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
                vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
                ScratchMem = NULL;
        }
#endif

#if REAL_ADDRESSING
        // Delete Low Memory area
        if (lm_area_mapped)
                vm_release(0, 0x2000);
#endif
        
        // Exit VM wrappers
        vm_exit();

        // Exit system routines
        SysExit();

        // Exit preferences
        PrefsExit();

        // Stop run loop
        [NSApp terminate: nil];
}

void QuitEmulator(void)
{
        QuitEmuNoExit();
        exit(0);
}


/*
 *  Code was patched, flush caches if neccessary (i.e. when using a real 680x0
 *  or a dynamically recompiling emulator)
 */

void FlushCodeCache(void *start, uint32 size)
{
}


/*
 *  SIGINT handler, enters mon
 */

#ifdef ENABLE_MON
static void sigint_handler(...)
{
        uaecptr nextpc;
        extern void m68k_dumpstate(uaecptr *nextpc);
        m68k_dumpstate(&nextpc);
        VideoQuitFullScreen();
        char *arg[4] = {"mon", "-m", "-r", NULL};
        mon(3, arg);
        QuitEmulator();
}
#endif


/*
 *  Mutexes
 */

#ifdef HAVE_PTHREADS

struct B2_mutex {
        B2_mutex() { pthread_mutex_init(&m, NULL); }
        ~B2_mutex() { pthread_mutex_unlock(&m); pthread_mutex_destroy(&m); }
        pthread_mutex_t m;
};

B2_mutex *B2_create_mutex(void)
{
        return new B2_mutex;
}

void B2_lock_mutex(B2_mutex *mutex)
{
        pthread_mutex_lock(&mutex->m);
}

void B2_unlock_mutex(B2_mutex *mutex)
{
        pthread_mutex_unlock(&mutex->m);
}

void B2_delete_mutex(B2_mutex *mutex)
{
        delete mutex;
}

#else

struct B2_mutex {
        int dummy;
};

B2_mutex *B2_create_mutex(void)
{
        return new B2_mutex;
}

void B2_lock_mutex(B2_mutex *mutex)
{
}

void B2_unlock_mutex(B2_mutex *mutex)
{
}

void B2_delete_mutex(B2_mutex *mutex)
{
        delete mutex;
}

#endif


/*
 *  Interrupt flags (must be handled atomically!)
 */

uint32 InterruptFlags = 0;

void SetInterruptFlag(uint32 flag)
{
        LOCK_INTFLAGS;
        InterruptFlags |= flag;
        UNLOCK_INTFLAGS;
}

void ClearInterruptFlag(uint32 flag)
{
        LOCK_INTFLAGS;
        InterruptFlags &= ~flag;
        UNLOCK_INTFLAGS;
}


/*
 *  Display error alert
 */

void ErrorAlert(const char *text)
{
        NSString *title  = [NSString stringWithCString:
                                                GetString(STR_ERROR_ALERT_TITLE) ];
        NSString *error  = [NSString stringWithCString: text];
        NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];

//      If we have a full screen mode, quit it here?

        NSLog(error);
        NSRunCriticalAlertPanel(title, error, button, nil, nil);
}


/*
 *  Display warning alert
 */

void WarningAlert(const char *text)
{
        NSString *title   = [NSString stringWithCString:
                                                        GetString(STR_WARNING_ALERT_TITLE) ];
        NSString *warning = [NSString stringWithCString: text];
        NSString *button  = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];

        NSLog(warning);
        NSRunAlertPanel(title, warning, button, nil, nil);
}


/*
 *  Display choice alert
 */

bool ChoiceAlert(const char *text, const char *pos, const char *neg)
{
        NSString *title   = [NSString stringWithCString:
                                                        GetString(STR_WARNING_ALERT_TITLE) ];
        NSString *warning = [NSString stringWithCString: text];
        NSString *yes     = [NSString stringWithCString: pos];
        NSString *no      = [NSString stringWithCString: neg];

        NSLog(warning);
        return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
}
Revision:	1.4
Committed:	2002-10-31T08:54:21Z (21 years, 6 months ago) by nigel
Branch:	MAIN
Changes since 1.3:	+3 -1 lines
Log Message:	Eliminate compile warning
#	User	Rev	Content
1	nigel	1.1	/*
2	nigel	1.4	* $Id: main_macosx.mm,v 1.3 2002/10/29 14:27:00 nigel Exp $
3	nigel	1.1	*
4			* main_macosx.mm - Startup code for MacOS X
5			* Based (in a small way) on the default main.m,
6			and on Basilisk's main_unix.cpp
7			*
8			* Basilisk II (C) 1997-2002 Christian Bauer
9			*
10			* This program is free software; you can redistribute it and/or modify
11			* it under the terms of the GNU General Public License as published by
12			* the Free Software Foundation; either version 2 of the License, or
13			* (at your option) any later version.
14			*
15			* This program is distributed in the hope that it will be useful,
16			* but WITHOUT ANY WARRANTY; without even the implied warranty of
17			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			* GNU General Public License for more details.
19			*
20			* You should have received a copy of the GNU General Public License
21			* along with this program; if not, write to the Free Software
22			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23			*/
24			#define PTHREADS
25			#include "sysdeps.h"
26
27			#ifdef HAVE_PTHREADS
28			# include <pthread.h>
29			#endif
30
31			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
32			# include <sys/mman.h>
33			#endif
34
35			#include "cpu_emulation.h"
36			#include "macos_util_macosx.h"
37			#include "main.h"
38			#include "prefs.h"
39			#include "prefs_editor.h"
40			#include "rom_patches.h"
41			#include "sys.h"
42			#include "timer.h"
43			#include "user_strings.h"
44			#include "version.h"
45			#include "video.h"
46			#include "vm_alloc.h"
47			#include "xpram.h"
48
49			#ifdef ENABLE_MON
50			# include "mon.h"
51			#endif
52
53			#define DEBUG 0
54			#include "debug.h"
55
56
57			#import <AppKit/AppKit.h>
58
59			#include "main_macosx.h" // To bridge between main() and misc. classes
60
61
62			// Constants
63			const char ROM_FILE_NAME[] = "ROM";
64			const int SIG_STACK_SIZE = SIGSTKSZ; // Size of signal stack
65			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
66
67
68			// CPU and FPU type, addressing mode
69			int CPUType;
70			bool CPUIs68060;
71			int FPUType;
72			bool TwentyFourBitAddressing;
73
74
75			// Global variables
76
77			#ifdef HAVE_PTHREADS
78
79			static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect InterruptFlags
80			#define LOCK_INTFLAGS pthread_mutex_lock(&intflag_lock)
81			#define UNLOCK_INTFLAGS pthread_mutex_unlock(&intflag_lock)
82
83			#else
84
85			#define LOCK_INTFLAGS
86			#define UNLOCK_INTFLAGS
87
88			#endif
89
90			#if USE_SCRATCHMEM_SUBTERFUGE
91			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
92			#endif
93
94			#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
95			#define SIG_TIMER SIGRTMIN
96			static timer_t timer; // 60Hz timer
97			#endif
98
99	nigel	1.3	#ifdef ENABLE_MON
100	nigel	1.1	static struct sigaction sigint_sa; // sigaction for SIGINT handler
101			static void sigint_handler(...);
102	nigel	1.3	#endif
103	nigel	1.1
104			#if REAL_ADDRESSING
105			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
106			#endif
107
108
109
110			/*
111			* Main program
112			*/
113
114			static void usage(const char *prg_name)
115			{
116			printf("Usage: %s [OPTION...]\n", prg_name);
117			printf("\nUnix options:\n");
118			printf(" --help\n display this usage message\n");
119			printf(" --break ADDRESS\n set ROM breakpoint\n");
120			printf(" --rominfo\n dump ROM information\n");
121			PrefsPrintUsage();
122			exit(0);
123			}
124
125			int main(int argc, char **argv)
126			{
127			// Initialize variables
128			RAMBaseHost = NULL;
129			ROMBaseHost = NULL;
130			srand(time(NULL));
131			tzset();
132
133			// Print some info
134			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
135			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
136
137			// Read preferences
138			PrefsInit(argc, argv);
139
140			// Parse command line arguments
141			for (int i=1; i<argc; i++) {
142			if (strcmp(argv[i], "--help") == 0) {
143			usage(argv[0]);
144			} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
145			i++;
146			} else if (strcmp(argv[i], "--break") == 0) {
147			i++;
148			if (i < argc)
149			ROMBreakpoint = strtol(argv[i], NULL, 0);
150			} else if (strcmp(argv[i], "--rominfo") == 0) {
151			PrintROMInfo = true;
152			} else if (argv[i][0] == '-') {
153			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
154			usage(argv[0]);
155			}
156			}
157
158			// Init system routines
159			SysInit();
160
161			// Open display, attach to window server,
162			// load pre-instantiated classes from MainMenu.nib, start run loop
163			int i = NSApplicationMain(argc, (const char **)argv);
164			// We currently never get past here, because QuitEmulator() does an exit()
165
166			// Exit system routines
167			SysExit();
168
169			// Exit preferences
170			PrefsExit();
171
172			return i;
173			}
174
175			#define QuitEmulator() QuitEmuNoExit() ; return NO;
176
177			bool InitEmulator (void)
178			{
179			char str[256];
180
181
182			// Read RAM size
183			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
184			if (RAMSize < 1024*1024) {
185			WarningAlert(GetString(STR_SMALL_RAM_WARN));
186			RAMSize = 1024*1024;
187			}
188
189			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
190			RAMSize = RAMSize & -getpagesize(); // Round down to page boundary
191			#endif
192
193			// Initialize VM system
194			vm_init();
195
196			#if REAL_ADDRESSING
197			// Flag: RAM and ROM are contigously allocated from address 0
198			bool memory_mapped_from_zero = false;
199
200			// Under Solaris/SPARC and NetBSD/m68k, Basilisk II is known to crash
201			// when trying to map a too big chunk of memory starting at address 0
202			#if defined(OS_solaris) \|\| defined(OS_netbsd)
203			const bool can_map_all_memory = false;
204			#else
205			const bool can_map_all_memory = true;
206			#endif
207
208			// Try to allocate all memory from 0x0000, if it is not known to crash
209			if (can_map_all_memory && (vm_acquire_fixed(0, RAMSize + 0x100000) == 0)) {
210			D(bug("Could allocate RAM and ROM from 0x0000\n"));
211			memory_mapped_from_zero = true;
212			}
213
214			// Otherwise, just create the Low Memory area (0x0000..0x2000)
215			else if (vm_acquire_fixed(0, 0x2000) == 0) {
216			D(bug("Could allocate the Low Memory globals\n"));
217			lm_area_mapped = true;
218			}
219
220			// Exit on failure
221			else {
222			sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
223			ErrorAlert(str);
224			QuitEmulator();
225			}
226	nigel	1.4	#else
227			*str = 0; // Eliminate unused variable warning
228	nigel	1.1	#endif
229
230			// Create areas for Mac RAM and ROM
231			#if REAL_ADDRESSING
232			if (memory_mapped_from_zero) {
233			RAMBaseHost = (uint8 *)0;
234			ROMBaseHost = RAMBaseHost + RAMSize;
235			}
236			else
237			#endif
238			{
239			RAMBaseHost = (uint8 *)vm_acquire(RAMSize);
240			ROMBaseHost = (uint8 *)vm_acquire(0x100000);
241			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
242			ErrorAlert(STR_NO_MEM_ERR);
243			QuitEmulator();
244			}
245			}
246
247			#if USE_SCRATCHMEM_SUBTERFUGE
248			// Allocate scratch memory
249			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
250			if (ScratchMem == VM_MAP_FAILED) {
251			ErrorAlert(STR_NO_MEM_ERR);
252			QuitEmulator();
253			}
254			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
255			#endif
256
257			#if DIRECT_ADDRESSING
258			// RAMBaseMac shall always be zero
259			MEMBaseDiff = (uintptr)RAMBaseHost;
260			RAMBaseMac = 0;
261			ROMBaseMac = Host2MacAddr(ROMBaseHost);
262			#endif
263			#if REAL_ADDRESSING
264			RAMBaseMac = (uint32)RAMBaseHost;
265			ROMBaseMac = (uint32)ROMBaseHost;
266			#endif
267			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
268			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
269
270			// Get rom file path from preferences
271			const char *rom_path = PrefsFindString("rom");
272
273			// Load Mac ROM
274			int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
275			if (rom_fd < 0) {
276			ErrorAlert(STR_NO_ROM_FILE_ERR);
277			QuitEmulator();
278			}
279			printf(GetString(STR_READING_ROM_FILE));
280			ROMSize = lseek(rom_fd, 0, SEEK_END);
281			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
282			ErrorAlert(STR_ROM_SIZE_ERR);
283			close(rom_fd);
284			QuitEmulator();
285			}
286			lseek(rom_fd, 0, SEEK_SET);
287			if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
288			ErrorAlert(STR_ROM_FILE_READ_ERR);
289			close(rom_fd);
290			QuitEmulator();
291			}
292
293
294			// Initialize everything
295			if (!InitAll())
296			QuitEmulator();
297			D(bug("Initialization complete\n"));
298
299
300			#ifdef ENABLE_MON
301			// Setup SIGINT handler to enter mon
302			sigemptyset(&sigint_sa.sa_mask);
303			sigint_sa.sa_handler = (void (*)(int))sigint_handler;
304			sigint_sa.sa_flags = 0;
305			sigaction(SIGINT, &sigint_sa, NULL);
306			#endif
307
308
309			return YES;
310			}
311
312			#undef QuitEmulator()
313
314
315			/*
316			* Quit emulator
317			*/
318
319			void QuitEmuNoExit()
320			{
321			extern NSApplication *NSApp;
322
323
324			D(bug("QuitEmulator\n"));
325
326			// Exit 680x0 emulation
327			Exit680x0();
328
329			// Deinitialize everything
330			ExitAll();
331
332			// Free ROM/RAM areas
333			if (RAMBaseHost != VM_MAP_FAILED) {
334			vm_release(RAMBaseHost, RAMSize);
335			RAMBaseHost = NULL;
336			}
337			if (ROMBaseHost != VM_MAP_FAILED) {
338			vm_release(ROMBaseHost, 0x100000);
339			ROMBaseHost = NULL;
340			}
341
342			#if USE_SCRATCHMEM_SUBTERFUGE
343			// Delete scratch memory area
344			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
345			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
346			ScratchMem = NULL;
347			}
348			#endif
349
350			#if REAL_ADDRESSING
351			// Delete Low Memory area
352			if (lm_area_mapped)
353			vm_release(0, 0x2000);
354			#endif
355
356			// Exit VM wrappers
357			vm_exit();
358
359			// Exit system routines
360			SysExit();
361
362			// Exit preferences
363			PrefsExit();
364
365			// Stop run loop
366			[NSApp terminate: nil];
367			}
368
369			void QuitEmulator(void)
370			{
371			QuitEmuNoExit();
372			exit(0);
373			}
374
375
376			/*
377			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
378			* or a dynamically recompiling emulator)
379			*/
380
381			void FlushCodeCache(void *start, uint32 size)
382			{
383			}
384
385
386			/*
387			* SIGINT handler, enters mon
388			*/
389
390			#ifdef ENABLE_MON
391			static void sigint_handler(...)
392			{
393			uaecptr nextpc;
394			extern void m68k_dumpstate(uaecptr *nextpc);
395			m68k_dumpstate(&nextpc);
396			VideoQuitFullScreen();
397			char *arg[4] = {"mon", "-m", "-r", NULL};
398			mon(3, arg);
399			QuitEmulator();
400			}
401			#endif
402
403
404			/*
405			* Mutexes
406			*/
407
408			#ifdef HAVE_PTHREADS
409
410			struct B2_mutex {
411			B2_mutex() { pthread_mutex_init(&m, NULL); }
412			~B2_mutex() { pthread_mutex_unlock(&m); pthread_mutex_destroy(&m); }
413			pthread_mutex_t m;
414			};
415
416			B2_mutex *B2_create_mutex(void)
417			{
418			return new B2_mutex;
419			}
420
421			void B2_lock_mutex(B2_mutex *mutex)
422			{
423			pthread_mutex_lock(&mutex->m);
424			}
425
426			void B2_unlock_mutex(B2_mutex *mutex)
427			{
428			pthread_mutex_unlock(&mutex->m);
429			}
430
431			void B2_delete_mutex(B2_mutex *mutex)
432			{
433			delete mutex;
434			}
435
436			#else
437
438			struct B2_mutex {
439			int dummy;
440			};
441
442			B2_mutex *B2_create_mutex(void)
443			{
444			return new B2_mutex;
445			}
446
447			void B2_lock_mutex(B2_mutex *mutex)
448			{
449			}
450
451			void B2_unlock_mutex(B2_mutex *mutex)
452			{
453			}
454
455			void B2_delete_mutex(B2_mutex *mutex)
456			{
457			delete mutex;
458			}
459
460			#endif
461
462
463			/*
464			* Interrupt flags (must be handled atomically!)
465			*/
466
467			uint32 InterruptFlags = 0;
468
469			void SetInterruptFlag(uint32 flag)
470			{
471			LOCK_INTFLAGS;
472			InterruptFlags \|= flag;
473			UNLOCK_INTFLAGS;
474			}
475
476			void ClearInterruptFlag(uint32 flag)
477			{
478			LOCK_INTFLAGS;
479			InterruptFlags &= ~flag;
480			UNLOCK_INTFLAGS;
481			}
482
483
484			/*
485			* Display error alert
486			*/
487
488			void ErrorAlert(const char *text)
489			{
490			NSString *title = [NSString stringWithCString:
491			GetString(STR_ERROR_ALERT_TITLE) ];
492			NSString *error = [NSString stringWithCString: text];
493			NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];
494
495			// If we have a full screen mode, quit it here?
496
497			NSLog(error);
498			NSRunCriticalAlertPanel(title, error, button, nil, nil);
499			}
500
501
502			/*
503			* Display warning alert
504			*/
505
506			void WarningAlert(const char *text)
507			{
508			NSString *title = [NSString stringWithCString:
509			GetString(STR_WARNING_ALERT_TITLE) ];
510			NSString *warning = [NSString stringWithCString: text];
511			NSString *button = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];
512
513			NSLog(warning);
514			NSRunAlertPanel(title, warning, button, nil, nil);
515			}
516
517
518			/*
519			* Display choice alert
520			*/
521
522			bool ChoiceAlert(const char text, const char pos, const char *neg)
523			{
524			NSString *title = [NSString stringWithCString:
525			GetString(STR_WARNING_ALERT_TITLE) ];
526			NSString *warning = [NSString stringWithCString: text];
527			NSString *yes = [NSString stringWithCString: pos];
528			NSString *no = [NSString stringWithCString: neg];
529
530			NSLog(warning);
531			return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
532			}