src/MacOSX/main_macosx.mm

/*
 *  $Id: main_macosx.mm,v 1.13 2005/01/30 21:42:13 gbeauche 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) 1997-2005 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
 */

#import <AppKit/AppKit.h>
#undef check

#define PTHREADS        // Why is this here?
#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_range(uint32 start, uint32 size);  // from compemu_support.cpp
#endif

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

#define DEBUG 0
#include "debug.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;
bool ThirtyThreeBitAddressing = false;


// 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


/*
 *  Map memory that can be accessed from the Mac side
 */

void *vm_acquire_mac(size_t size)
{
        void *m = vm_acquire(size, VM_MAP_DEFAULT | VM_MAP_33BIT);
        if (m == NULL) {
                ThirtyThreeBitAddressing = false;
                m = vm_acquire(size);
        }
        return m;
}


/*
 *  SIGSEGV handler
 */

static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address,
                                                                                sigsegv_address_t fault_instruction)
{
#if ENABLE_VOSF
        // Handle screen fault
        extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
        if (Screen_fault_handler(fault_address, fault_instruction))
                return SIGSEGV_RETURN_SUCCESS;
#endif

#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
        // Ignore writes to ROM
        if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
                return SIGSEGV_RETURN_SKIP_INSTRUCTION;

        // Ignore all other faults, if requested
        if (PrefsFindBool("ignoresegv"))
                return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#endif

        return SIGSEGV_RETURN_FAILURE;
}


/*
 *  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));

        // 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]);
                }
        }

        // Read preferences
        PrefsInit(argc, argv);

        // 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];


        // Install the handler for SIGSEGV
        if (!sigsegv_install_handler(sigsegv_handler)) {
                sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
                ErrorAlert(str);
                QuitEmulator();
        }

        // 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) || defined(PAGEZERO_HACK)
        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;
        }

#ifndef PAGEZERO_HACK
        // 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();
        }
#endif
#else
        *str = 0;               // Eliminate unused variable warning
#endif /* REAL_ADDRESSING */

        // Create areas for Mac RAM and ROM
#if REAL_ADDRESSING
        if (memory_mapped_from_zero) {
                RAMBaseHost = (uint8 *)0;
                ROMBaseHost = RAMBaseHost + RAMSize;
        }
        else
#endif
        {
#ifdef USE_33BIT_ADDRESSING
                // Speculatively enables 33-bit addressing
                ThirtyThreeBitAddressing = true;
#endif
                uint8 *ram_rom_area = (uint8 *)vm_acquire_mac(RAMSize + 0x100000);
                if (ram_rom_area == VM_MAP_FAILED) { 
                        ErrorAlert(STR_NO_MEM_ERR);
                        QuitEmulator();
                }
                RAMBaseHost = ram_rom_area;
                ROMBaseHost = RAMBaseHost + RAMSize;
        }

#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 + 0x100000);
                RAMBaseHost = 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)
{
        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_range((uintptr)start, size);
#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


#ifdef HAVE_PTHREADS
/*
 *  Pthread configuration
 */

void Set_pthread_attr(pthread_attr_t *attr, int priority)
{
        pthread_attr_init(attr);
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
        // Some of these only work for superuser
        if (geteuid() == 0) {
                pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
                pthread_attr_setschedpolicy(attr, SCHED_FIFO);
                struct sched_param fifo_param;
                fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO)
                                                                         + sched_get_priority_max(SCHED_FIFO))
                                                                         / 2 + priority);
                pthread_attr_setschedparam(attr, &fifo_param);
        }
        if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
#ifdef PTHREAD_SCOPE_BOUND_NP
            // If system scope is not available (eg. we're not running
            // with CAP_SCHED_MGT capability on an SGI box), try bound
            // scope.  It exposes pthread scheduling to the kernel,
            // without setting realtime priority.
            pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
#endif
        }
#endif
}
#endif // HAVE_PTHREADS


/*
 *  Mutexes
 */

#ifdef HAVE_PTHREADS

struct B2_mutex {
        B2_mutex() {
                pthread_mutexattr_t attr;
                pthread_mutexattr_init(&attr);
                // Initialize the mutex for priority inheritance --
                // required for accurate timing.
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
                pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
#endif
#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
                pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
#endif
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
                pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
#endif
                pthread_mutex_init(&m, &attr);
                pthread_mutexattr_destroy(&attr);
        }
        ~B2_mutex() {
                pthread_mutex_trylock(&m);      // Make sure it's locked before
                pthread_mutex_unlock(&m);       // unlocking it.
                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) ];

        NSLog(error);
        if ( PrefsFindBool("nogui") )
                return;
        VideoQuitFullScreen();
        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);
        if ( PrefsFindBool("nogui") )
                return;
        VideoQuitFullScreen();
        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];

        return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
}
Revision:	1.14
Committed:	2005-09-19T07:49:12Z (18 years, 8 months ago) by nigel
Branch:	MAIN
CVS Tags:	nigel-build-17
Changes since 1.13:	+63 -14 lines
Log Message:	Fixes from latest Unix version (no more black screen bug!)
#	User	Rev	Content
1	nigel	1.1	/*
2	nigel	1.14	* $Id: main_macosx.mm,v 1.13 2005/01/30 21:42:13 gbeauche 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	gbeauche	1.13	* Basilisk II (C) 1997-2005 Christian Bauer
9	nigel	1.1	*
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	nigel	1.14
25			#import <AppKit/AppKit.h>
26			#undef check
27
28	nigel	1.10	#define PTHREADS // Why is this here?
29	nigel	1.1	#include "sysdeps.h"
30
31			#ifdef HAVE_PTHREADS
32			# include <pthread.h>
33			#endif
34
35			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
36			# include <sys/mman.h>
37			#endif
38
39	nigel	1.8	#include <string>
40			using std::string;
41
42	nigel	1.1	#include "cpu_emulation.h"
43			#include "macos_util_macosx.h"
44			#include "main.h"
45			#include "prefs.h"
46			#include "prefs_editor.h"
47			#include "rom_patches.h"
48	nigel	1.8	#include "sigsegv.h"
49	nigel	1.1	#include "sys.h"
50			#include "user_strings.h"
51			#include "version.h"
52			#include "video.h"
53			#include "vm_alloc.h"
54			#include "xpram.h"
55
56	nigel	1.8	#if USE_JIT
57	nigel	1.12	extern void flush_icache_range(uint32 start, uint32 size); // from compemu_support.cpp
58	nigel	1.8	#endif
59
60	nigel	1.1	#ifdef ENABLE_MON
61			# include "mon.h"
62			#endif
63
64			#define DEBUG 0
65			#include "debug.h"
66
67
68			#include "main_macosx.h" // To bridge between main() and misc. classes
69
70
71			// Constants
72			const char ROM_FILE_NAME[] = "ROM";
73			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
74
75
76			// CPU and FPU type, addressing mode
77			int CPUType;
78			bool CPUIs68060;
79			int FPUType;
80			bool TwentyFourBitAddressing;
81	nigel	1.14	bool ThirtyThreeBitAddressing = false;
82	nigel	1.1
83
84			// Global variables
85
86			#ifdef HAVE_PTHREADS
87
88			static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect InterruptFlags
89			#define LOCK_INTFLAGS pthread_mutex_lock(&intflag_lock)
90			#define UNLOCK_INTFLAGS pthread_mutex_unlock(&intflag_lock)
91
92			#else
93
94			#define LOCK_INTFLAGS
95			#define UNLOCK_INTFLAGS
96
97			#endif
98
99			#if USE_SCRATCHMEM_SUBTERFUGE
100			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
101			#endif
102
103	nigel	1.3	#ifdef ENABLE_MON
104	nigel	1.1	static struct sigaction sigint_sa; // sigaction for SIGINT handler
105			static void sigint_handler(...);
106	nigel	1.3	#endif
107	nigel	1.1
108			#if REAL_ADDRESSING
109			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
110			#endif
111
112
113	nigel	1.8	/*
114	nigel	1.14	* Map memory that can be accessed from the Mac side
115			*/
116
117			void *vm_acquire_mac(size_t size)
118			{
119			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
120			if (m == NULL) {
121			ThirtyThreeBitAddressing = false;
122			m = vm_acquire(size);
123			}
124			return m;
125			}
126
127
128			/*
129	nigel	1.10	* SIGSEGV handler
130			*/
131
132			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address,
133			sigsegv_address_t fault_instruction)
134			{
135			#if ENABLE_VOSF
136			// Handle screen fault
137			extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
138			if (Screen_fault_handler(fault_address, fault_instruction))
139			return SIGSEGV_RETURN_SUCCESS;
140			#endif
141
142			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
143			// Ignore writes to ROM
144			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
145			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
146
147			// Ignore all other faults, if requested
148			if (PrefsFindBool("ignoresegv"))
149			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
150			#endif
151
152			return SIGSEGV_RETURN_FAILURE;
153			}
154
155
156			/*
157	nigel	1.8	* Dump state when everything went wrong after a SEGV
158			*/
159
160			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
161			{
162			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
163			if (fault_instruction != SIGSEGV_INVALID_PC)
164			fprintf(stderr, " [IP=%p]", fault_instruction);
165			fprintf(stderr, "\n");
166			uaecptr nextpc;
167			extern void m68k_dumpstate(uaecptr *nextpc);
168			m68k_dumpstate(&nextpc);
169			#if USE_JIT && JIT_DEBUG
170			extern void compiler_dumpstate(void);
171			compiler_dumpstate();
172			#endif
173			VideoQuitFullScreen();
174			#ifdef ENABLE_MON
175			char *arg[4] = {"mon", "-m", "-r", NULL};
176			mon(3, arg);
177			QuitEmulator();
178			#endif
179			}
180
181	nigel	1.1
182			/*
183			* Main program
184			*/
185
186			static void usage(const char *prg_name)
187			{
188			printf("Usage: %s [OPTION...]\n", prg_name);
189			printf("\nUnix options:\n");
190			printf(" --help\n display this usage message\n");
191	nigel	1.8	printf(" --config FILE\n read/write configuration from/to FILE\n");
192	nigel	1.1	printf(" --break ADDRESS\n set ROM breakpoint\n");
193			printf(" --rominfo\n dump ROM information\n");
194	nigel	1.8	LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
195	nigel	1.1	PrefsPrintUsage();
196			exit(0);
197			}
198
199			int main(int argc, char **argv)
200			{
201			// Initialize variables
202			RAMBaseHost = NULL;
203			ROMBaseHost = NULL;
204			srand(time(NULL));
205			tzset();
206
207			// Print some info
208			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
209			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
210
211			// Parse command line arguments
212			for (int i=1; i<argc; i++) {
213			if (strcmp(argv[i], "--help") == 0) {
214			usage(argv[0]);
215			} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
216			i++;
217			} else if (strcmp(argv[i], "--break") == 0) {
218			i++;
219			if (i < argc)
220			ROMBreakpoint = strtol(argv[i], NULL, 0);
221	nigel	1.8	} else if (strcmp(argv[i], "--config") == 0) {
222			argv[i++] = NULL;
223			if (i < argc) {
224			extern string UserPrefsPath; // from prefs_unix.cpp
225			UserPrefsPath = argv[i];
226			argv[i] = NULL;
227			}
228	nigel	1.1	} else if (strcmp(argv[i], "--rominfo") == 0) {
229			PrintROMInfo = true;
230			} else if (argv[i][0] == '-') {
231			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
232			usage(argv[0]);
233			}
234			}
235
236	nigel	1.10	// Read preferences
237			PrefsInit(argc, argv);
238
239	nigel	1.1	// Init system routines
240			SysInit();
241
242			// Open display, attach to window server,
243			// load pre-instantiated classes from MainMenu.nib, start run loop
244			int i = NSApplicationMain(argc, (const char **)argv);
245			// We currently never get past here, because QuitEmulator() does an exit()
246
247			// Exit system routines
248			SysExit();
249
250			// Exit preferences
251			PrefsExit();
252
253			return i;
254			}
255
256	nigel	1.7	#define QuitEmulator() { QuitEmuNoExit() ; return NO; }
257	nigel	1.1
258			bool InitEmulator (void)
259			{
260			char str[256];
261
262
263	nigel	1.10	// Install the handler for SIGSEGV
264			if (!sigsegv_install_handler(sigsegv_handler)) {
265			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
266			ErrorAlert(str);
267			QuitEmulator();
268			}
269	nigel	1.8
270			// Register dump state function when we got mad after a segfault
271			sigsegv_set_dump_state(sigsegv_dump_state);
272
273	nigel	1.1	// Read RAM size
274			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
275			if (RAMSize < 1024*1024) {
276			WarningAlert(GetString(STR_SMALL_RAM_WARN));
277			RAMSize = 1024*1024;
278			}
279
280			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
281			RAMSize = RAMSize & -getpagesize(); // Round down to page boundary
282			#endif
283
284			// Initialize VM system
285			vm_init();
286
287			#if REAL_ADDRESSING
288			// Flag: RAM and ROM are contigously allocated from address 0
289			bool memory_mapped_from_zero = false;
290
291			// Under Solaris/SPARC and NetBSD/m68k, Basilisk II is known to crash
292			// when trying to map a too big chunk of memory starting at address 0
293	nigel	1.10	#if defined(OS_solaris) \|\| defined(OS_netbsd) \|\| defined(PAGEZERO_HACK)
294	nigel	1.1	const bool can_map_all_memory = false;
295			#else
296			const bool can_map_all_memory = true;
297			#endif
298
299			// Try to allocate all memory from 0x0000, if it is not known to crash
300			if (can_map_all_memory && (vm_acquire_fixed(0, RAMSize + 0x100000) == 0)) {
301			D(bug("Could allocate RAM and ROM from 0x0000\n"));
302			memory_mapped_from_zero = true;
303			}
304	nigel	1.10
305			#ifndef PAGEZERO_HACK
306	nigel	1.1	// Otherwise, just create the Low Memory area (0x0000..0x2000)
307			else if (vm_acquire_fixed(0, 0x2000) == 0) {
308			D(bug("Could allocate the Low Memory globals\n"));
309			lm_area_mapped = true;
310			}
311
312			// Exit on failure
313			else {
314			sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
315			ErrorAlert(str);
316			QuitEmulator();
317			}
318	nigel	1.10	#endif
319	nigel	1.4	#else
320			*str = 0; // Eliminate unused variable warning
321	nigel	1.10	#endif /* REAL_ADDRESSING */
322	nigel	1.1
323			// Create areas for Mac RAM and ROM
324			#if REAL_ADDRESSING
325			if (memory_mapped_from_zero) {
326			RAMBaseHost = (uint8 *)0;
327			ROMBaseHost = RAMBaseHost + RAMSize;
328			}
329			else
330			#endif
331			{
332	nigel	1.14	#ifdef USE_33BIT_ADDRESSING
333			// Speculatively enables 33-bit addressing
334			ThirtyThreeBitAddressing = true;
335			#endif
336			uint8 ram_rom_area = (uint8 )vm_acquire_mac(RAMSize + 0x100000);
337			if (ram_rom_area == VM_MAP_FAILED) {
338	nigel	1.1	ErrorAlert(STR_NO_MEM_ERR);
339			QuitEmulator();
340			}
341	nigel	1.14	RAMBaseHost = ram_rom_area;
342			ROMBaseHost = RAMBaseHost + RAMSize;
343	nigel	1.1	}
344
345			#if USE_SCRATCHMEM_SUBTERFUGE
346			// Allocate scratch memory
347			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
348			if (ScratchMem == VM_MAP_FAILED) {
349			ErrorAlert(STR_NO_MEM_ERR);
350			QuitEmulator();
351			}
352			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
353			#endif
354
355			#if DIRECT_ADDRESSING
356			// RAMBaseMac shall always be zero
357			MEMBaseDiff = (uintptr)RAMBaseHost;
358			RAMBaseMac = 0;
359			ROMBaseMac = Host2MacAddr(ROMBaseHost);
360			#endif
361			#if REAL_ADDRESSING
362			RAMBaseMac = (uint32)RAMBaseHost;
363			ROMBaseMac = (uint32)ROMBaseHost;
364			#endif
365			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
366			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
367
368			// Get rom file path from preferences
369			const char *rom_path = PrefsFindString("rom");
370	nigel	1.6	if ( ! rom_path )
371			WarningAlert("No rom pathname set. Trying ./ROM");
372	nigel	1.1
373			// Load Mac ROM
374			int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
375			if (rom_fd < 0) {
376			ErrorAlert(STR_NO_ROM_FILE_ERR);
377			QuitEmulator();
378			}
379			printf(GetString(STR_READING_ROM_FILE));
380			ROMSize = lseek(rom_fd, 0, SEEK_END);
381			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
382			ErrorAlert(STR_ROM_SIZE_ERR);
383			close(rom_fd);
384			QuitEmulator();
385			}
386			lseek(rom_fd, 0, SEEK_SET);
387			if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
388			ErrorAlert(STR_ROM_FILE_READ_ERR);
389			close(rom_fd);
390			QuitEmulator();
391			}
392
393
394			// Initialize everything
395			if (!InitAll())
396			QuitEmulator();
397			D(bug("Initialization complete\n"));
398
399
400			#ifdef ENABLE_MON
401			// Setup SIGINT handler to enter mon
402			sigemptyset(&sigint_sa.sa_mask);
403			sigint_sa.sa_handler = (void (*)(int))sigint_handler;
404			sigint_sa.sa_flags = 0;
405			sigaction(SIGINT, &sigint_sa, NULL);
406			#endif
407
408
409			return YES;
410			}
411
412			#undef QuitEmulator()
413
414
415			/*
416			* Quit emulator
417			*/
418
419			void QuitEmuNoExit()
420			{
421			D(bug("QuitEmulator\n"));
422
423			// Exit 680x0 emulation
424			Exit680x0();
425
426			// Deinitialize everything
427			ExitAll();
428
429			// Free ROM/RAM areas
430			if (RAMBaseHost != VM_MAP_FAILED) {
431	nigel	1.14	vm_release(RAMBaseHost, RAMSize + 0x100000);
432	nigel	1.1	RAMBaseHost = NULL;
433			}
434
435			#if USE_SCRATCHMEM_SUBTERFUGE
436			// Delete scratch memory area
437			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
438			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
439			ScratchMem = NULL;
440			}
441			#endif
442
443			#if REAL_ADDRESSING
444			// Delete Low Memory area
445			if (lm_area_mapped)
446			vm_release(0, 0x2000);
447			#endif
448
449			// Exit VM wrappers
450			vm_exit();
451
452			// Exit system routines
453			SysExit();
454
455			// Exit preferences
456			PrefsExit();
457			}
458
459			void QuitEmulator(void)
460			{
461			QuitEmuNoExit();
462	nigel	1.6
463			// Stop run loop?
464			[NSApp terminate: nil];
465
466	nigel	1.1	exit(0);
467			}
468
469
470			/*
471			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
472			* or a dynamically recompiling emulator)
473			*/
474
475			void FlushCodeCache(void *start, uint32 size)
476			{
477	nigel	1.8	#if USE_JIT
478			if (UseJIT)
479	nigel	1.12	flush_icache_range((uintptr)start, size);
480	nigel	1.8	#endif
481	nigel	1.1	}
482
483
484			/*
485			* SIGINT handler, enters mon
486			*/
487
488			#ifdef ENABLE_MON
489			static void sigint_handler(...)
490			{
491			uaecptr nextpc;
492			extern void m68k_dumpstate(uaecptr *nextpc);
493			m68k_dumpstate(&nextpc);
494			VideoQuitFullScreen();
495			char *arg[4] = {"mon", "-m", "-r", NULL};
496			mon(3, arg);
497			QuitEmulator();
498			}
499			#endif
500
501
502	nigel	1.14	#ifdef HAVE_PTHREADS
503			/*
504			* Pthread configuration
505			*/
506
507			void Set_pthread_attr(pthread_attr_t *attr, int priority)
508			{
509			pthread_attr_init(attr);
510			#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
511			// Some of these only work for superuser
512			if (geteuid() == 0) {
513			pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
514			pthread_attr_setschedpolicy(attr, SCHED_FIFO);
515			struct sched_param fifo_param;
516			fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO)
517			+ sched_get_priority_max(SCHED_FIFO))
518			/ 2 + priority);
519			pthread_attr_setschedparam(attr, &fifo_param);
520			}
521			if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
522			#ifdef PTHREAD_SCOPE_BOUND_NP
523			// If system scope is not available (eg. we're not running
524			// with CAP_SCHED_MGT capability on an SGI box), try bound
525			// scope. It exposes pthread scheduling to the kernel,
526			// without setting realtime priority.
527			pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
528			#endif
529			}
530			#endif
531			}
532			#endif // HAVE_PTHREADS
533
534
535	nigel	1.1	/*
536			* Mutexes
537			*/
538
539			#ifdef HAVE_PTHREADS
540
541			struct B2_mutex {
542	nigel	1.10	B2_mutex() {
543			pthread_mutexattr_t attr;
544			pthread_mutexattr_init(&attr);
545			// Initialize the mutex for priority inheritance --
546			// required for accurate timing.
547			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
548			pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
549			#endif
550			#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
551			pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
552			#endif
553			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
554			pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
555			#endif
556			pthread_mutex_init(&m, &attr);
557			pthread_mutexattr_destroy(&attr);
558			}
559			~B2_mutex() {
560			pthread_mutex_trylock(&m); // Make sure it's locked before
561			pthread_mutex_unlock(&m); // unlocking it.
562			pthread_mutex_destroy(&m);
563			}
564	nigel	1.1	pthread_mutex_t m;
565			};
566
567			B2_mutex *B2_create_mutex(void)
568			{
569			return new B2_mutex;
570			}
571
572			void B2_lock_mutex(B2_mutex *mutex)
573			{
574			pthread_mutex_lock(&mutex->m);
575			}
576
577			void B2_unlock_mutex(B2_mutex *mutex)
578			{
579			pthread_mutex_unlock(&mutex->m);
580			}
581
582			void B2_delete_mutex(B2_mutex *mutex)
583			{
584			delete mutex;
585			}
586
587			#else
588
589			struct B2_mutex {
590			int dummy;
591			};
592
593			B2_mutex *B2_create_mutex(void)
594			{
595			return new B2_mutex;
596			}
597
598			void B2_lock_mutex(B2_mutex *mutex)
599			{
600			}
601
602			void B2_unlock_mutex(B2_mutex *mutex)
603			{
604			}
605
606			void B2_delete_mutex(B2_mutex *mutex)
607			{
608			delete mutex;
609			}
610
611			#endif
612
613
614			/*
615			* Interrupt flags (must be handled atomically!)
616			*/
617
618			uint32 InterruptFlags = 0;
619
620			void SetInterruptFlag(uint32 flag)
621			{
622			LOCK_INTFLAGS;
623			InterruptFlags \|= flag;
624			UNLOCK_INTFLAGS;
625			}
626
627			void ClearInterruptFlag(uint32 flag)
628			{
629			LOCK_INTFLAGS;
630			InterruptFlags &= ~flag;
631			UNLOCK_INTFLAGS;
632			}
633
634
635			/*
636			* Display error alert
637			*/
638
639			void ErrorAlert(const char *text)
640			{
641			NSString *title = [NSString stringWithCString:
642			GetString(STR_ERROR_ALERT_TITLE) ];
643			NSString *error = [NSString stringWithCString: text];
644			NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];
645
646			NSLog(error);
647	nigel	1.10	if ( PrefsFindBool("nogui") )
648			return;
649			VideoQuitFullScreen();
650	nigel	1.1	NSRunCriticalAlertPanel(title, error, button, nil, nil);
651			}
652
653
654			/*
655			* Display warning alert
656			*/
657
658			void WarningAlert(const char *text)
659			{
660			NSString *title = [NSString stringWithCString:
661			GetString(STR_WARNING_ALERT_TITLE) ];
662			NSString *warning = [NSString stringWithCString: text];
663			NSString *button = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];
664
665			NSLog(warning);
666	nigel	1.10	if ( PrefsFindBool("nogui") )
667			return;
668			VideoQuitFullScreen();
669	nigel	1.1	NSRunAlertPanel(title, warning, button, nil, nil);
670			}
671
672
673			/*
674			* Display choice alert
675			*/
676
677			bool ChoiceAlert(const char text, const char pos, const char *neg)
678			{
679			NSString *title = [NSString stringWithCString:
680			GetString(STR_WARNING_ALERT_TITLE) ];
681			NSString *warning = [NSString stringWithCString: text];
682			NSString *yes = [NSString stringWithCString: pos];
683			NSString *no = [NSString stringWithCString: neg];
684
685			return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
686			}