src/MacOSX/main_macosx.mm

/*
 *  $Id: main_macosx.mm,v 1.8 2003/04/02 00:50:40 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 <string>
using std::string;

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

#if USE_JIT
extern void (*flush_icache)(int); // from compemu_support.cpp
#endif

#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 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

#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


/*
 *  Dump state when everything went wrong after a SEGV
 */

static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
{
        fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
        if (fault_instruction != SIGSEGV_INVALID_PC)
                fprintf(stderr, " [IP=%p]", fault_instruction);
        fprintf(stderr, "\n");
        uaecptr nextpc;
        extern void m68k_dumpstate(uaecptr *nextpc);
        m68k_dumpstate(&nextpc);
#if USE_JIT && JIT_DEBUG
        extern void compiler_dumpstate(void);
        compiler_dumpstate();
#endif
        VideoQuitFullScreen();
#ifdef ENABLE_MON
        char *arg[4] = {"mon", "-m", "-r", NULL};
        mon(3, arg);
        QuitEmulator();
#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("  --config FILE\n    read/write configuration from/to FILE\n");
        printf("  --break ADDRESS\n    set ROM breakpoint\n");
        printf("  --rominfo\n    dump ROM information\n");
        LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
        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], "--config") == 0) {
                        argv[i++] = NULL;
                        if (i < argc) {
                                extern string UserPrefsPath; // from prefs_unix.cpp
                                UserPrefsPath = argv[i];
                                argv[i] = NULL;
                        }
                } 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];


        // Register request to ignore all segmentation faults
#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
        if (PrefsFindBool("ignoresegv"))
                sigsegv_set_ignore_state(0, ~(0UL), SIGSEGV_TRANSFER_LOAD | SIGSEGV_TRANSFER_STORE);
#endif

        // Register dump state function when we got mad after a segfault
        sigsegv_set_dump_state(sigsegv_dump_state);

        // 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");
        if ( ! rom_path )
                WarningAlert("No rom pathname set. Trying ./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()
{
        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();
}

void QuitEmulator(void)
{
        extern  NSApplication *NSApp;


        QuitEmuNoExit();

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

        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)
{
#if USE_JIT
    if (UseJIT)
                flush_icache(-1);
#endif
}


/*
 *  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:	1.9
Committed:	2003-08-02T11:03:15Z (20 years, 10 months ago) by nigel
Branch:	MAIN
Changes since 1.8:	+3 -3 lines
Log Message:	Some segmentation trap changes from latest main_unix.cpp
#	User	Rev	Content
1	nigel	1.1	/*
2	nigel	1.9	* $Id: main_macosx.mm,v 1.8 2003/04/02 00:50:40 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	nigel	1.8	#include <string>
36			using std::string;
37
38	nigel	1.1	#include "cpu_emulation.h"
39			#include "macos_util_macosx.h"
40			#include "main.h"
41			#include "prefs.h"
42			#include "prefs_editor.h"
43			#include "rom_patches.h"
44	nigel	1.8	#include "sigsegv.h"
45	nigel	1.1	#include "sys.h"
46			#include "user_strings.h"
47			#include "version.h"
48			#include "video.h"
49			#include "vm_alloc.h"
50			#include "xpram.h"
51
52	nigel	1.8	#if USE_JIT
53			extern void (*flush_icache)(int); // from compemu_support.cpp
54			#endif
55
56	nigel	1.1	#ifdef ENABLE_MON
57			# include "mon.h"
58			#endif
59
60			#define DEBUG 0
61			#include "debug.h"
62
63
64			#import <AppKit/AppKit.h>
65
66			#include "main_macosx.h" // To bridge between main() and misc. classes
67
68
69			// Constants
70			const char ROM_FILE_NAME[] = "ROM";
71			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
72
73
74			// CPU and FPU type, addressing mode
75			int CPUType;
76			bool CPUIs68060;
77			int FPUType;
78			bool TwentyFourBitAddressing;
79
80
81			// Global variables
82
83			#ifdef HAVE_PTHREADS
84
85			static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect InterruptFlags
86			#define LOCK_INTFLAGS pthread_mutex_lock(&intflag_lock)
87			#define UNLOCK_INTFLAGS pthread_mutex_unlock(&intflag_lock)
88
89			#else
90
91			#define LOCK_INTFLAGS
92			#define UNLOCK_INTFLAGS
93
94			#endif
95
96			#if USE_SCRATCHMEM_SUBTERFUGE
97			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
98			#endif
99
100	nigel	1.3	#ifdef ENABLE_MON
101	nigel	1.1	static struct sigaction sigint_sa; // sigaction for SIGINT handler
102			static void sigint_handler(...);
103	nigel	1.3	#endif
104	nigel	1.1
105			#if REAL_ADDRESSING
106			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
107			#endif
108
109
110	nigel	1.8	/*
111			* Dump state when everything went wrong after a SEGV
112			*/
113
114			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
115			{
116			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
117			if (fault_instruction != SIGSEGV_INVALID_PC)
118			fprintf(stderr, " [IP=%p]", fault_instruction);
119			fprintf(stderr, "\n");
120			uaecptr nextpc;
121			extern void m68k_dumpstate(uaecptr *nextpc);
122			m68k_dumpstate(&nextpc);
123			#if USE_JIT && JIT_DEBUG
124			extern void compiler_dumpstate(void);
125			compiler_dumpstate();
126			#endif
127			VideoQuitFullScreen();
128			#ifdef ENABLE_MON
129			char *arg[4] = {"mon", "-m", "-r", NULL};
130			mon(3, arg);
131			QuitEmulator();
132			#endif
133			}
134
135	nigel	1.1
136			/*
137			* Main program
138			*/
139
140			static void usage(const char *prg_name)
141			{
142			printf("Usage: %s [OPTION...]\n", prg_name);
143			printf("\nUnix options:\n");
144			printf(" --help\n display this usage message\n");
145	nigel	1.8	printf(" --config FILE\n read/write configuration from/to FILE\n");
146	nigel	1.1	printf(" --break ADDRESS\n set ROM breakpoint\n");
147			printf(" --rominfo\n dump ROM information\n");
148	nigel	1.8	LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
149	nigel	1.1	PrefsPrintUsage();
150			exit(0);
151			}
152
153			int main(int argc, char **argv)
154			{
155			// Initialize variables
156			RAMBaseHost = NULL;
157			ROMBaseHost = NULL;
158			srand(time(NULL));
159			tzset();
160
161			// Print some info
162			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
163			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
164
165			// Read preferences
166			PrefsInit(argc, argv);
167
168			// Parse command line arguments
169			for (int i=1; i<argc; i++) {
170			if (strcmp(argv[i], "--help") == 0) {
171			usage(argv[0]);
172			} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
173			i++;
174			} else if (strcmp(argv[i], "--break") == 0) {
175			i++;
176			if (i < argc)
177			ROMBreakpoint = strtol(argv[i], NULL, 0);
178	nigel	1.8	} else if (strcmp(argv[i], "--config") == 0) {
179			argv[i++] = NULL;
180			if (i < argc) {
181			extern string UserPrefsPath; // from prefs_unix.cpp
182			UserPrefsPath = argv[i];
183			argv[i] = NULL;
184			}
185	nigel	1.1	} else if (strcmp(argv[i], "--rominfo") == 0) {
186			PrintROMInfo = true;
187			} else if (argv[i][0] == '-') {
188			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
189			usage(argv[0]);
190			}
191			}
192
193			// Init system routines
194			SysInit();
195
196			// Open display, attach to window server,
197			// load pre-instantiated classes from MainMenu.nib, start run loop
198			int i = NSApplicationMain(argc, (const char **)argv);
199			// We currently never get past here, because QuitEmulator() does an exit()
200
201			// Exit system routines
202			SysExit();
203
204			// Exit preferences
205			PrefsExit();
206
207			return i;
208			}
209
210	nigel	1.7	#define QuitEmulator() { QuitEmuNoExit() ; return NO; }
211	nigel	1.1
212			bool InitEmulator (void)
213			{
214			char str[256];
215
216
217	nigel	1.9	// Register request to ignore all segmentation faults
218	nigel	1.8	#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
219			if (PrefsFindBool("ignoresegv"))
220	nigel	1.9	sigsegv_set_ignore_state(0, ~(0UL), SIGSEGV_TRANSFER_LOAD \| SIGSEGV_TRANSFER_STORE);
221	nigel	1.8	#endif
222
223			// Register dump state function when we got mad after a segfault
224			sigsegv_set_dump_state(sigsegv_dump_state);
225
226	nigel	1.1	// Read RAM size
227			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
228			if (RAMSize < 1024*1024) {
229			WarningAlert(GetString(STR_SMALL_RAM_WARN));
230			RAMSize = 1024*1024;
231			}
232
233			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
234			RAMSize = RAMSize & -getpagesize(); // Round down to page boundary
235			#endif
236
237			// Initialize VM system
238			vm_init();
239
240			#if REAL_ADDRESSING
241			// Flag: RAM and ROM are contigously allocated from address 0
242			bool memory_mapped_from_zero = false;
243
244			// Under Solaris/SPARC and NetBSD/m68k, Basilisk II is known to crash
245			// when trying to map a too big chunk of memory starting at address 0
246			#if defined(OS_solaris) \|\| defined(OS_netbsd)
247			const bool can_map_all_memory = false;
248			#else
249			const bool can_map_all_memory = true;
250			#endif
251
252			// Try to allocate all memory from 0x0000, if it is not known to crash
253			if (can_map_all_memory && (vm_acquire_fixed(0, RAMSize + 0x100000) == 0)) {
254			D(bug("Could allocate RAM and ROM from 0x0000\n"));
255			memory_mapped_from_zero = true;
256			}
257
258			// Otherwise, just create the Low Memory area (0x0000..0x2000)
259			else if (vm_acquire_fixed(0, 0x2000) == 0) {
260			D(bug("Could allocate the Low Memory globals\n"));
261			lm_area_mapped = true;
262			}
263
264			// Exit on failure
265			else {
266			sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
267			ErrorAlert(str);
268			QuitEmulator();
269			}
270	nigel	1.4	#else
271			*str = 0; // Eliminate unused variable warning
272	nigel	1.1	#endif
273
274			// Create areas for Mac RAM and ROM
275			#if REAL_ADDRESSING
276			if (memory_mapped_from_zero) {
277			RAMBaseHost = (uint8 *)0;
278			ROMBaseHost = RAMBaseHost + RAMSize;
279			}
280			else
281			#endif
282			{
283			RAMBaseHost = (uint8 *)vm_acquire(RAMSize);
284			ROMBaseHost = (uint8 *)vm_acquire(0x100000);
285			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
286			ErrorAlert(STR_NO_MEM_ERR);
287			QuitEmulator();
288			}
289			}
290
291			#if USE_SCRATCHMEM_SUBTERFUGE
292			// Allocate scratch memory
293			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
294			if (ScratchMem == VM_MAP_FAILED) {
295			ErrorAlert(STR_NO_MEM_ERR);
296			QuitEmulator();
297			}
298			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
299			#endif
300
301			#if DIRECT_ADDRESSING
302			// RAMBaseMac shall always be zero
303			MEMBaseDiff = (uintptr)RAMBaseHost;
304			RAMBaseMac = 0;
305			ROMBaseMac = Host2MacAddr(ROMBaseHost);
306			#endif
307			#if REAL_ADDRESSING
308			RAMBaseMac = (uint32)RAMBaseHost;
309			ROMBaseMac = (uint32)ROMBaseHost;
310			#endif
311			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
312			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
313
314			// Get rom file path from preferences
315			const char *rom_path = PrefsFindString("rom");
316	nigel	1.6	if ( ! rom_path )
317			WarningAlert("No rom pathname set. Trying ./ROM");
318	nigel	1.1
319			// Load Mac ROM
320			int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
321			if (rom_fd < 0) {
322			ErrorAlert(STR_NO_ROM_FILE_ERR);
323			QuitEmulator();
324			}
325			printf(GetString(STR_READING_ROM_FILE));
326			ROMSize = lseek(rom_fd, 0, SEEK_END);
327			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
328			ErrorAlert(STR_ROM_SIZE_ERR);
329			close(rom_fd);
330			QuitEmulator();
331			}
332			lseek(rom_fd, 0, SEEK_SET);
333			if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
334			ErrorAlert(STR_ROM_FILE_READ_ERR);
335			close(rom_fd);
336			QuitEmulator();
337			}
338
339
340			// Initialize everything
341			if (!InitAll())
342			QuitEmulator();
343			D(bug("Initialization complete\n"));
344
345
346			#ifdef ENABLE_MON
347			// Setup SIGINT handler to enter mon
348			sigemptyset(&sigint_sa.sa_mask);
349			sigint_sa.sa_handler = (void (*)(int))sigint_handler;
350			sigint_sa.sa_flags = 0;
351			sigaction(SIGINT, &sigint_sa, NULL);
352			#endif
353
354
355			return YES;
356			}
357
358			#undef QuitEmulator()
359
360
361			/*
362			* Quit emulator
363			*/
364
365			void QuitEmuNoExit()
366			{
367			D(bug("QuitEmulator\n"));
368
369			// Exit 680x0 emulation
370			Exit680x0();
371
372			// Deinitialize everything
373			ExitAll();
374
375			// Free ROM/RAM areas
376			if (RAMBaseHost != VM_MAP_FAILED) {
377			vm_release(RAMBaseHost, RAMSize);
378			RAMBaseHost = NULL;
379			}
380			if (ROMBaseHost != VM_MAP_FAILED) {
381			vm_release(ROMBaseHost, 0x100000);
382			ROMBaseHost = NULL;
383			}
384
385			#if USE_SCRATCHMEM_SUBTERFUGE
386			// Delete scratch memory area
387			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
388			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
389			ScratchMem = NULL;
390			}
391			#endif
392
393			#if REAL_ADDRESSING
394			// Delete Low Memory area
395			if (lm_area_mapped)
396			vm_release(0, 0x2000);
397			#endif
398
399			// Exit VM wrappers
400			vm_exit();
401
402			// Exit system routines
403			SysExit();
404
405			// Exit preferences
406			PrefsExit();
407			}
408
409			void QuitEmulator(void)
410			{
411	nigel	1.6	extern NSApplication *NSApp;
412
413
414	nigel	1.1	QuitEmuNoExit();
415	nigel	1.6
416			// Stop run loop?
417			[NSApp terminate: nil];
418
419	nigel	1.1	exit(0);
420			}
421
422
423			/*
424			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
425			* or a dynamically recompiling emulator)
426			*/
427
428			void FlushCodeCache(void *start, uint32 size)
429			{
430	nigel	1.8	#if USE_JIT
431			if (UseJIT)
432			flush_icache(-1);
433			#endif
434	nigel	1.1	}
435
436
437			/*
438			* SIGINT handler, enters mon
439			*/
440
441			#ifdef ENABLE_MON
442			static void sigint_handler(...)
443			{
444			uaecptr nextpc;
445			extern void m68k_dumpstate(uaecptr *nextpc);
446			m68k_dumpstate(&nextpc);
447			VideoQuitFullScreen();
448			char *arg[4] = {"mon", "-m", "-r", NULL};
449			mon(3, arg);
450			QuitEmulator();
451			}
452			#endif
453
454
455			/*
456			* Mutexes
457			*/
458
459			#ifdef HAVE_PTHREADS
460
461			struct B2_mutex {
462			B2_mutex() { pthread_mutex_init(&m, NULL); }
463			~B2_mutex() { pthread_mutex_unlock(&m); pthread_mutex_destroy(&m); }
464			pthread_mutex_t m;
465			};
466
467			B2_mutex *B2_create_mutex(void)
468			{
469			return new B2_mutex;
470			}
471
472			void B2_lock_mutex(B2_mutex *mutex)
473			{
474			pthread_mutex_lock(&mutex->m);
475			}
476
477			void B2_unlock_mutex(B2_mutex *mutex)
478			{
479			pthread_mutex_unlock(&mutex->m);
480			}
481
482			void B2_delete_mutex(B2_mutex *mutex)
483			{
484			delete mutex;
485			}
486
487			#else
488
489			struct B2_mutex {
490			int dummy;
491			};
492
493			B2_mutex *B2_create_mutex(void)
494			{
495			return new B2_mutex;
496			}
497
498			void B2_lock_mutex(B2_mutex *mutex)
499			{
500			}
501
502			void B2_unlock_mutex(B2_mutex *mutex)
503			{
504			}
505
506			void B2_delete_mutex(B2_mutex *mutex)
507			{
508			delete mutex;
509			}
510
511			#endif
512
513
514			/*
515			* Interrupt flags (must be handled atomically!)
516			*/
517
518			uint32 InterruptFlags = 0;
519
520			void SetInterruptFlag(uint32 flag)
521			{
522			LOCK_INTFLAGS;
523			InterruptFlags \|= flag;
524			UNLOCK_INTFLAGS;
525			}
526
527			void ClearInterruptFlag(uint32 flag)
528			{
529			LOCK_INTFLAGS;
530			InterruptFlags &= ~flag;
531			UNLOCK_INTFLAGS;
532			}
533
534
535			/*
536			* Display error alert
537			*/
538
539			void ErrorAlert(const char *text)
540			{
541			NSString *title = [NSString stringWithCString:
542			GetString(STR_ERROR_ALERT_TITLE) ];
543			NSString *error = [NSString stringWithCString: text];
544			NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];
545
546			// If we have a full screen mode, quit it here?
547
548			NSLog(error);
549			NSRunCriticalAlertPanel(title, error, button, nil, nil);
550			}
551
552
553			/*
554			* Display warning alert
555			*/
556
557			void WarningAlert(const char *text)
558			{
559			NSString *title = [NSString stringWithCString:
560			GetString(STR_WARNING_ALERT_TITLE) ];
561			NSString *warning = [NSString stringWithCString: text];
562			NSString *button = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];
563
564			NSLog(warning);
565			NSRunAlertPanel(title, warning, button, nil, nil);
566			}
567
568
569			/*
570			* Display choice alert
571			*/
572
573			bool ChoiceAlert(const char text, const char pos, const char *neg)
574			{
575			NSString *title = [NSString stringWithCString:
576			GetString(STR_WARNING_ALERT_TITLE) ];
577			NSString *warning = [NSString stringWithCString: text];
578			NSString *yes = [NSString stringWithCString: pos];
579			NSString *no = [NSString stringWithCString: neg];
580
581			NSLog(warning);
582			return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
583			}