src/MacOSX/main_macosx.mm

/*
 *  $Id: main_macosx.mm,v 1.17 2007/01/13 18:21:30 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(uint8 *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;


// 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


/*
 *  Helpers to map memory that can be accessed from the Mac side
 */

// NOTE: VM_MAP_32BIT is only used when compiling a 64-bit JIT on specific platforms
void *vm_acquire_mac(size_t size)
{
        return vm_acquire(size, VM_MAP_DEFAULT | VM_MAP_32BIT);
}

static int vm_acquire_mac_fixed(void *addr, size_t size)
{
        return vm_acquire_fixed(addr, size, VM_MAP_DEFAULT | VM_MAP_32BIT);
}


/*
 *  SIGSEGV handler
 */

static sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip)
{
        const uintptr fault_address = (uintptr)sigsegv_get_fault_address(sip);
#if ENABLE_VOSF
        // Handle screen fault
        extern bool Screen_fault_handler(sigsegv_info_t *sip);
        if (Screen_fault_handler(sip))
                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_info_t *sip)
{
        const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
        const sigsegv_address_t fault_instruction = sigsegv_get_fault_instruction_address(sip);
        fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
        if (fault_instruction != SIGSEGV_INVALID_ADDRESS)
                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);
#endif
        QuitEmulator();
}


/*
 *  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 (RAMSize > 1023*1024*1024)                                           // Cap to 1023MB (APD crashes at 1GB)
                RAMSize = 1023*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;

        // Make sure to map RAM & ROM at address 0 only on platforms that
        // supports linker scripts to relocate the Basilisk II executable
        // above 0x70000000
#if HAVE_LINKER_SCRIPT
        const bool can_map_all_memory = true;
#else
        const bool can_map_all_memory = false;
#endif
        
        // Try to allocate all memory from 0x0000, if it is not known to crash
        if (can_map_all_memory && (vm_acquire_mac_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_mac_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
        {
                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_mac(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 = Host2MacAddr(RAMBaseHost);
        ROMBaseMac = Host2MacAddr(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;
                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)
{
        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((uint8 *)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:	1.18
Committed:	2007-12-30T08:47:34Z (16 years, 5 months ago) by gbeauche
Branch:	MAIN
Changes since 1.17:	+9 -7 lines
Log Message:	Sync with the new SIGSEGV API.
#	User	Rev	Content
1	nigel	1.1	/*
2	gbeauche	1.18	* $Id: main_macosx.mm,v 1.17 2007/01/13 18:21:30 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	gbeauche	1.16	extern void flush_icache_range(uint8 *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
82
83			// Global variables
84
85			#ifdef HAVE_PTHREADS
86
87			static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect InterruptFlags
88			#define LOCK_INTFLAGS pthread_mutex_lock(&intflag_lock)
89			#define UNLOCK_INTFLAGS pthread_mutex_unlock(&intflag_lock)
90
91			#else
92
93			#define LOCK_INTFLAGS
94			#define UNLOCK_INTFLAGS
95
96			#endif
97
98			#if USE_SCRATCHMEM_SUBTERFUGE
99			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
100			#endif
101
102	nigel	1.3	#ifdef ENABLE_MON
103	nigel	1.1	static struct sigaction sigint_sa; // sigaction for SIGINT handler
104			static void sigint_handler(...);
105	nigel	1.3	#endif
106	nigel	1.1
107			#if REAL_ADDRESSING
108			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
109			#endif
110
111
112	nigel	1.8	/*
113	nigel	1.15	* Helpers to map memory that can be accessed from the Mac side
114	nigel	1.14	*/
115
116	gbeauche	1.17	// NOTE: VM_MAP_32BIT is only used when compiling a 64-bit JIT on specific platforms
117	nigel	1.14	void *vm_acquire_mac(size_t size)
118			{
119	gbeauche	1.17	return vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_32BIT);
120	nigel	1.14	}
121
122	nigel	1.15	static int vm_acquire_mac_fixed(void *addr, size_t size)
123			{
124	gbeauche	1.17	return vm_acquire_fixed(addr, size, VM_MAP_DEFAULT \| VM_MAP_32BIT);
125	nigel	1.15	}
126
127	nigel	1.14
128			/*
129	nigel	1.10	* SIGSEGV handler
130			*/
131
132	gbeauche	1.18	static sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip)
133	nigel	1.10	{
134	gbeauche	1.18	const uintptr fault_address = (uintptr)sigsegv_get_fault_address(sip);
135	nigel	1.10	#if ENABLE_VOSF
136			// Handle screen fault
137	gbeauche	1.18	extern bool Screen_fault_handler(sigsegv_info_t *sip);
138			if (Screen_fault_handler(sip))
139	nigel	1.10	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	gbeauche	1.18	static void sigsegv_dump_state(sigsegv_info_t *sip)
161	nigel	1.8	{
162	gbeauche	1.18	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
163			const sigsegv_address_t fault_instruction = sigsegv_get_fault_instruction_address(sip);
164	nigel	1.8	fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
165	gbeauche	1.18	if (fault_instruction != SIGSEGV_INVALID_ADDRESS)
166	nigel	1.8	fprintf(stderr, " [IP=%p]", fault_instruction);
167			fprintf(stderr, "\n");
168			uaecptr nextpc;
169			extern void m68k_dumpstate(uaecptr *nextpc);
170			m68k_dumpstate(&nextpc);
171			#if USE_JIT && JIT_DEBUG
172			extern void compiler_dumpstate(void);
173			compiler_dumpstate();
174			#endif
175			VideoQuitFullScreen();
176			#ifdef ENABLE_MON
177			char *arg[4] = {"mon", "-m", "-r", NULL};
178			mon(3, arg);
179	nigel	1.15	#endif
180	nigel	1.8	QuitEmulator();
181			}
182
183	nigel	1.1
184			/*
185			* Main program
186			*/
187
188			static void usage(const char *prg_name)
189			{
190			printf("Usage: %s [OPTION...]\n", prg_name);
191			printf("\nUnix options:\n");
192			printf(" --help\n display this usage message\n");
193	nigel	1.8	printf(" --config FILE\n read/write configuration from/to FILE\n");
194	nigel	1.1	printf(" --break ADDRESS\n set ROM breakpoint\n");
195			printf(" --rominfo\n dump ROM information\n");
196	nigel	1.8	LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
197	nigel	1.1	PrefsPrintUsage();
198			exit(0);
199			}
200
201			int main(int argc, char **argv)
202			{
203			// Initialize variables
204			RAMBaseHost = NULL;
205			ROMBaseHost = NULL;
206			srand(time(NULL));
207			tzset();
208
209			// Print some info
210			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
211			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
212
213			// Parse command line arguments
214			for (int i=1; i<argc; i++) {
215			if (strcmp(argv[i], "--help") == 0) {
216			usage(argv[0]);
217			} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
218			i++;
219			} else if (strcmp(argv[i], "--break") == 0) {
220			i++;
221			if (i < argc)
222			ROMBreakpoint = strtol(argv[i], NULL, 0);
223	nigel	1.8	} else if (strcmp(argv[i], "--config") == 0) {
224			argv[i++] = NULL;
225			if (i < argc) {
226			extern string UserPrefsPath; // from prefs_unix.cpp
227			UserPrefsPath = argv[i];
228			argv[i] = NULL;
229			}
230	nigel	1.1	} else if (strcmp(argv[i], "--rominfo") == 0) {
231			PrintROMInfo = true;
232			} else if (argv[i][0] == '-') {
233			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
234			usage(argv[0]);
235			}
236			}
237
238	nigel	1.10	// Read preferences
239			PrefsInit(argc, argv);
240
241	nigel	1.1	// Init system routines
242			SysInit();
243
244			// Open display, attach to window server,
245			// load pre-instantiated classes from MainMenu.nib, start run loop
246			int i = NSApplicationMain(argc, (const char **)argv);
247			// We currently never get past here, because QuitEmulator() does an exit()
248
249			// Exit system routines
250			SysExit();
251
252			// Exit preferences
253			PrefsExit();
254
255			return i;
256			}
257
258	nigel	1.7	#define QuitEmulator() { QuitEmuNoExit() ; return NO; }
259	nigel	1.1
260			bool InitEmulator (void)
261			{
262			char str[256];
263
264
265	nigel	1.10	// Install the handler for SIGSEGV
266			if (!sigsegv_install_handler(sigsegv_handler)) {
267			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
268			ErrorAlert(str);
269			QuitEmulator();
270			}
271	nigel	1.8
272			// Register dump state function when we got mad after a segfault
273			sigsegv_set_dump_state(sigsegv_dump_state);
274
275	nigel	1.1	// Read RAM size
276			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
277			if (RAMSize < 1024*1024) {
278			WarningAlert(GetString(STR_SMALL_RAM_WARN));
279			RAMSize = 1024*1024;
280			}
281	nigel	1.15	if (RAMSize > 102310241024) // Cap to 1023MB (APD crashes at 1GB)
282			RAMSize = 102310241024;
283	nigel	1.1
284			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
285			RAMSize = RAMSize & -getpagesize(); // Round down to page boundary
286			#endif
287
288			// Initialize VM system
289			vm_init();
290
291			#if REAL_ADDRESSING
292			// Flag: RAM and ROM are contigously allocated from address 0
293			bool memory_mapped_from_zero = false;
294	nigel	1.15
295			// Make sure to map RAM & ROM at address 0 only on platforms that
296			// supports linker scripts to relocate the Basilisk II executable
297			// above 0x70000000
298			#if HAVE_LINKER_SCRIPT
299			const bool can_map_all_memory = true;
300			#else
301	nigel	1.1	const bool can_map_all_memory = false;
302			#endif
303
304			// Try to allocate all memory from 0x0000, if it is not known to crash
305	nigel	1.15	if (can_map_all_memory && (vm_acquire_mac_fixed(0, RAMSize + 0x100000) == 0)) {
306	nigel	1.1	D(bug("Could allocate RAM and ROM from 0x0000\n"));
307			memory_mapped_from_zero = true;
308			}
309	nigel	1.15
310	nigel	1.10	#ifndef PAGEZERO_HACK
311	nigel	1.1	// Otherwise, just create the Low Memory area (0x0000..0x2000)
312	nigel	1.15	else if (vm_acquire_mac_fixed(0, 0x2000) == 0) {
313	nigel	1.1	D(bug("Could allocate the Low Memory globals\n"));
314			lm_area_mapped = true;
315			}
316
317			// Exit on failure
318			else {
319			sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
320			ErrorAlert(str);
321			QuitEmulator();
322			}
323	nigel	1.10	#endif
324	nigel	1.4	#else
325			*str = 0; // Eliminate unused variable warning
326	nigel	1.10	#endif /* REAL_ADDRESSING */
327	nigel	1.1
328			// Create areas for Mac RAM and ROM
329			#if REAL_ADDRESSING
330			if (memory_mapped_from_zero) {
331			RAMBaseHost = (uint8 *)0;
332			ROMBaseHost = RAMBaseHost + RAMSize;
333			}
334			else
335			#endif
336			{
337	nigel	1.14	uint8 ram_rom_area = (uint8 )vm_acquire_mac(RAMSize + 0x100000);
338			if (ram_rom_area == VM_MAP_FAILED) {
339	nigel	1.1	ErrorAlert(STR_NO_MEM_ERR);
340			QuitEmulator();
341			}
342	nigel	1.14	RAMBaseHost = ram_rom_area;
343			ROMBaseHost = RAMBaseHost + RAMSize;
344	nigel	1.1	}
345
346			#if USE_SCRATCHMEM_SUBTERFUGE
347			// Allocate scratch memory
348	nigel	1.15	ScratchMem = (uint8 *)vm_acquire_mac(SCRATCH_MEM_SIZE);
349	nigel	1.1	if (ScratchMem == VM_MAP_FAILED) {
350			ErrorAlert(STR_NO_MEM_ERR);
351			QuitEmulator();
352			}
353			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
354			#endif
355
356			#if DIRECT_ADDRESSING
357			// RAMBaseMac shall always be zero
358			MEMBaseDiff = (uintptr)RAMBaseHost;
359			RAMBaseMac = 0;
360			ROMBaseMac = Host2MacAddr(ROMBaseHost);
361			#endif
362			#if REAL_ADDRESSING
363	nigel	1.15	RAMBaseMac = Host2MacAddr(RAMBaseHost);
364			ROMBaseMac = Host2MacAddr(ROMBaseHost);
365	nigel	1.1	#endif
366			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
367			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
368
369			// Get rom file path from preferences
370			const char *rom_path = PrefsFindString("rom");
371	nigel	1.6	if ( ! rom_path )
372			WarningAlert("No rom pathname set. Trying ./ROM");
373	nigel	1.1
374			// Load Mac ROM
375			int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
376			if (rom_fd < 0) {
377			ErrorAlert(STR_NO_ROM_FILE_ERR);
378			QuitEmulator();
379			}
380			printf(GetString(STR_READING_ROM_FILE));
381			ROMSize = lseek(rom_fd, 0, SEEK_END);
382			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
383			ErrorAlert(STR_ROM_SIZE_ERR);
384			close(rom_fd);
385			QuitEmulator();
386			}
387			lseek(rom_fd, 0, SEEK_SET);
388			if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
389			ErrorAlert(STR_ROM_FILE_READ_ERR);
390			close(rom_fd);
391			QuitEmulator();
392			}
393
394
395			// Initialize everything
396			if (!InitAll())
397			QuitEmulator();
398			D(bug("Initialization complete\n"));
399
400
401			#ifdef ENABLE_MON
402			// Setup SIGINT handler to enter mon
403			sigemptyset(&sigint_sa.sa_mask);
404			sigint_sa.sa_handler = (void (*)(int))sigint_handler;
405			sigint_sa.sa_flags = 0;
406			sigaction(SIGINT, &sigint_sa, NULL);
407			#endif
408
409
410			return YES;
411			}
412
413			#undef QuitEmulator()
414
415
416			/*
417			* Quit emulator
418			*/
419
420			void QuitEmuNoExit()
421			{
422			D(bug("QuitEmulator\n"));
423
424			// Exit 680x0 emulation
425			Exit680x0();
426
427			// Deinitialize everything
428			ExitAll();
429
430			// Free ROM/RAM areas
431			if (RAMBaseHost != VM_MAP_FAILED) {
432	nigel	1.14	vm_release(RAMBaseHost, RAMSize + 0x100000);
433	nigel	1.1	RAMBaseHost = NULL;
434	nigel	1.15	ROMBaseHost = NULL;
435	nigel	1.1	}
436
437			#if USE_SCRATCHMEM_SUBTERFUGE
438			// Delete scratch memory area
439			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
440			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
441			ScratchMem = NULL;
442			}
443			#endif
444
445			#if REAL_ADDRESSING
446			// Delete Low Memory area
447			if (lm_area_mapped)
448			vm_release(0, 0x2000);
449			#endif
450
451			// Exit VM wrappers
452			vm_exit();
453
454			// Exit system routines
455			SysExit();
456
457			// Exit preferences
458			PrefsExit();
459			}
460
461			void QuitEmulator(void)
462			{
463			QuitEmuNoExit();
464	nigel	1.6
465			// Stop run loop?
466			[NSApp terminate: nil];
467
468	nigel	1.1	exit(0);
469			}
470
471
472			/*
473			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
474			* or a dynamically recompiling emulator)
475			*/
476
477			void FlushCodeCache(void *start, uint32 size)
478			{
479	nigel	1.8	#if USE_JIT
480			if (UseJIT)
481	gbeauche	1.16	flush_icache_range((uint8 *)start, size);
482	nigel	1.8	#endif
483	nigel	1.1	}
484
485
486			/*
487			* SIGINT handler, enters mon
488			*/
489
490			#ifdef ENABLE_MON
491			static void sigint_handler(...)
492			{
493			uaecptr nextpc;
494			extern void m68k_dumpstate(uaecptr *nextpc);
495			m68k_dumpstate(&nextpc);
496			VideoQuitFullScreen();
497			char *arg[4] = {"mon", "-m", "-r", NULL};
498			mon(3, arg);
499			QuitEmulator();
500			}
501			#endif
502
503
504	nigel	1.14	#ifdef HAVE_PTHREADS
505			/*
506			* Pthread configuration
507			*/
508
509			void Set_pthread_attr(pthread_attr_t *attr, int priority)
510			{
511			pthread_attr_init(attr);
512			#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
513			// Some of these only work for superuser
514			if (geteuid() == 0) {
515			pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
516			pthread_attr_setschedpolicy(attr, SCHED_FIFO);
517			struct sched_param fifo_param;
518			fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO)
519			+ sched_get_priority_max(SCHED_FIFO))
520			/ 2 + priority);
521			pthread_attr_setschedparam(attr, &fifo_param);
522			}
523			if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
524			#ifdef PTHREAD_SCOPE_BOUND_NP
525			// If system scope is not available (eg. we're not running
526			// with CAP_SCHED_MGT capability on an SGI box), try bound
527			// scope. It exposes pthread scheduling to the kernel,
528			// without setting realtime priority.
529			pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
530			#endif
531			}
532			#endif
533			}
534			#endif // HAVE_PTHREADS
535
536
537	nigel	1.1	/*
538			* Mutexes
539			*/
540
541			#ifdef HAVE_PTHREADS
542
543			struct B2_mutex {
544	nigel	1.10	B2_mutex() {
545			pthread_mutexattr_t attr;
546			pthread_mutexattr_init(&attr);
547			// Initialize the mutex for priority inheritance --
548			// required for accurate timing.
549			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
550			pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
551			#endif
552			#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
553			pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
554			#endif
555			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
556			pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
557			#endif
558			pthread_mutex_init(&m, &attr);
559			pthread_mutexattr_destroy(&attr);
560			}
561			~B2_mutex() {
562			pthread_mutex_trylock(&m); // Make sure it's locked before
563			pthread_mutex_unlock(&m); // unlocking it.
564			pthread_mutex_destroy(&m);
565			}
566	nigel	1.1	pthread_mutex_t m;
567			};
568
569			B2_mutex *B2_create_mutex(void)
570			{
571			return new B2_mutex;
572			}
573
574			void B2_lock_mutex(B2_mutex *mutex)
575			{
576			pthread_mutex_lock(&mutex->m);
577			}
578
579			void B2_unlock_mutex(B2_mutex *mutex)
580			{
581			pthread_mutex_unlock(&mutex->m);
582			}
583
584			void B2_delete_mutex(B2_mutex *mutex)
585			{
586			delete mutex;
587			}
588
589			#else
590
591			struct B2_mutex {
592			int dummy;
593			};
594
595			B2_mutex *B2_create_mutex(void)
596			{
597			return new B2_mutex;
598			}
599
600			void B2_lock_mutex(B2_mutex *mutex)
601			{
602			}
603
604			void B2_unlock_mutex(B2_mutex *mutex)
605			{
606			}
607
608			void B2_delete_mutex(B2_mutex *mutex)
609			{
610			delete mutex;
611			}
612
613			#endif
614
615
616			/*
617			* Interrupt flags (must be handled atomically!)
618			*/
619
620			uint32 InterruptFlags = 0;
621
622			void SetInterruptFlag(uint32 flag)
623			{
624			LOCK_INTFLAGS;
625			InterruptFlags \|= flag;
626			UNLOCK_INTFLAGS;
627			}
628
629			void ClearInterruptFlag(uint32 flag)
630			{
631			LOCK_INTFLAGS;
632			InterruptFlags &= ~flag;
633			UNLOCK_INTFLAGS;
634			}
635
636
637			/*
638			* Display error alert
639			*/
640
641			void ErrorAlert(const char *text)
642			{
643			NSString *title = [NSString stringWithCString:
644			GetString(STR_ERROR_ALERT_TITLE) ];
645			NSString *error = [NSString stringWithCString: text];
646			NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];
647
648			NSLog(error);
649	nigel	1.10	if ( PrefsFindBool("nogui") )
650			return;
651			VideoQuitFullScreen();
652	nigel	1.1	NSRunCriticalAlertPanel(title, error, button, nil, nil);
653			}
654
655
656			/*
657			* Display warning alert
658			*/
659
660			void WarningAlert(const char *text)
661			{
662			NSString *title = [NSString stringWithCString:
663			GetString(STR_WARNING_ALERT_TITLE) ];
664			NSString *warning = [NSString stringWithCString: text];
665			NSString *button = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];
666
667			NSLog(warning);
668	nigel	1.10	if ( PrefsFindBool("nogui") )
669			return;
670			VideoQuitFullScreen();
671	nigel	1.1	NSRunAlertPanel(title, warning, button, nil, nil);
672			}
673
674
675			/*
676			* Display choice alert
677			*/
678
679			bool ChoiceAlert(const char text, const char pos, const char *neg)
680			{
681			NSString *title = [NSString stringWithCString:
682			GetString(STR_WARNING_ALERT_TITLE) ];
683			NSString *warning = [NSString stringWithCString: text];
684			NSString *yes = [NSString stringWithCString: pos];
685			NSString *no = [NSString stringWithCString: neg];
686
687			return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
688			}