src/MacOSX/main_macosx.mm

/*
 *  $Id: main_macosx.mm,v 1.15 2006/03/11 11:45:25 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) 1997-2005 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;
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


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

// NOTE: VM_MAP_33BIT is only used when compiling a 64-bit JIT on specific platforms
void *vm_acquire_mac(size_t size)
{
        void *m = vm_acquire(size, VM_MAP_DEFAULT | VM_MAP_33BIT);
#ifdef USE_33BIT_ADDRESSING
        if (m == VM_MAP_FAILED) {
                printf("WARNING: Cannot acquire memory in 33-bit address space (%s)\n", strerror(errno));
                ThirtyThreeBitAddressing = false;
                m = vm_acquire(size);
        }
#endif
        return m;
}

static int vm_acquire_mac_fixed(void *addr, size_t size)
{
        int ret = vm_acquire_fixed(addr, size, VM_MAP_DEFAULT | VM_MAP_33BIT);
#ifdef USE_33BIT_ADDRESSING
        if (ret < 0) {
                printf("WARNING: Cannot acquire fixed memory in 33-bit address space (%s)\n", strerror(errno));
                ThirtyThreeBitAddressing = false;
                ret = vm_acquire_fixed(addr, size);
        }
#endif
        return ret;
}


/*
 *  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);
#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();

#ifdef USE_33BIT_ADDRESSING
        // Speculatively enables 33-bit addressing
        ThirtyThreeBitAddressing = true;
#endif

#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:	1.16
Committed:	2006-05-08T16:56:07Z (18 years, 5 months ago) by gbeauche
Branch:	MAIN
CVS Tags:	nigel-build-19
Changes since 1.15:	+3 -3 lines
Log Message:	Fix for LAZY_FLUSH_ICACHE_RANGE. Blocks are indexed by native addresses.
#	User	Rev	Content
1	nigel	1.1	/*
2	gbeauche	1.16	* $Id: main_macosx.mm,v 1.15 2006/03/11 11:45:25 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	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	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	1.15	* Helpers to map memory that can be accessed from the Mac side
115	nigel	1.14	*/
116
117	nigel	1.15	// NOTE: VM_MAP_33BIT is only used when compiling a 64-bit JIT on specific platforms
118	nigel	1.14	void *vm_acquire_mac(size_t size)
119			{
120			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
121	nigel	1.15	#ifdef USE_33BIT_ADDRESSING
122			if (m == VM_MAP_FAILED) {
123			printf("WARNING: Cannot acquire memory in 33-bit address space (%s)\n", strerror(errno));
124	nigel	1.14	ThirtyThreeBitAddressing = false;
125			m = vm_acquire(size);
126			}
127	nigel	1.15	#endif
128	nigel	1.14	return m;
129			}
130
131	nigel	1.15	static int vm_acquire_mac_fixed(void *addr, size_t size)
132			{
133			int ret = vm_acquire_fixed(addr, size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
134			#ifdef USE_33BIT_ADDRESSING
135			if (ret < 0) {
136			printf("WARNING: Cannot acquire fixed memory in 33-bit address space (%s)\n", strerror(errno));
137			ThirtyThreeBitAddressing = false;
138			ret = vm_acquire_fixed(addr, size);
139			}
140			#endif
141			return ret;
142			}
143
144	nigel	1.14
145			/*
146	nigel	1.10	* SIGSEGV handler
147			*/
148
149			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address,
150			sigsegv_address_t fault_instruction)
151			{
152			#if ENABLE_VOSF
153			// Handle screen fault
154			extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
155			if (Screen_fault_handler(fault_address, fault_instruction))
156			return SIGSEGV_RETURN_SUCCESS;
157			#endif
158
159			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
160			// Ignore writes to ROM
161			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
162			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
163
164			// Ignore all other faults, if requested
165			if (PrefsFindBool("ignoresegv"))
166			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
167			#endif
168
169			return SIGSEGV_RETURN_FAILURE;
170			}
171
172
173			/*
174	nigel	1.8	* Dump state when everything went wrong after a SEGV
175			*/
176
177			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
178			{
179			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
180			if (fault_instruction != SIGSEGV_INVALID_PC)
181			fprintf(stderr, " [IP=%p]", fault_instruction);
182			fprintf(stderr, "\n");
183			uaecptr nextpc;
184			extern void m68k_dumpstate(uaecptr *nextpc);
185			m68k_dumpstate(&nextpc);
186			#if USE_JIT && JIT_DEBUG
187			extern void compiler_dumpstate(void);
188			compiler_dumpstate();
189			#endif
190			VideoQuitFullScreen();
191			#ifdef ENABLE_MON
192			char *arg[4] = {"mon", "-m", "-r", NULL};
193			mon(3, arg);
194	nigel	1.15	#endif
195	nigel	1.8	QuitEmulator();
196			}
197
198	nigel	1.1
199			/*
200			* Main program
201			*/
202
203			static void usage(const char *prg_name)
204			{
205			printf("Usage: %s [OPTION...]\n", prg_name);
206			printf("\nUnix options:\n");
207			printf(" --help\n display this usage message\n");
208	nigel	1.8	printf(" --config FILE\n read/write configuration from/to FILE\n");
209	nigel	1.1	printf(" --break ADDRESS\n set ROM breakpoint\n");
210			printf(" --rominfo\n dump ROM information\n");
211	nigel	1.8	LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
212	nigel	1.1	PrefsPrintUsage();
213			exit(0);
214			}
215
216			int main(int argc, char **argv)
217			{
218			// Initialize variables
219			RAMBaseHost = NULL;
220			ROMBaseHost = NULL;
221			srand(time(NULL));
222			tzset();
223
224			// Print some info
225			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
226			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
227
228			// Parse command line arguments
229			for (int i=1; i<argc; i++) {
230			if (strcmp(argv[i], "--help") == 0) {
231			usage(argv[0]);
232			} else if (strncmp(argv[i], "-psn_", 5) == 0) {// OS X process identifier
233			i++;
234			} else if (strcmp(argv[i], "--break") == 0) {
235			i++;
236			if (i < argc)
237			ROMBreakpoint = strtol(argv[i], NULL, 0);
238	nigel	1.8	} else if (strcmp(argv[i], "--config") == 0) {
239			argv[i++] = NULL;
240			if (i < argc) {
241			extern string UserPrefsPath; // from prefs_unix.cpp
242			UserPrefsPath = argv[i];
243			argv[i] = NULL;
244			}
245	nigel	1.1	} else if (strcmp(argv[i], "--rominfo") == 0) {
246			PrintROMInfo = true;
247			} else if (argv[i][0] == '-') {
248			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
249			usage(argv[0]);
250			}
251			}
252
253	nigel	1.10	// Read preferences
254			PrefsInit(argc, argv);
255
256	nigel	1.1	// Init system routines
257			SysInit();
258
259			// Open display, attach to window server,
260			// load pre-instantiated classes from MainMenu.nib, start run loop
261			int i = NSApplicationMain(argc, (const char **)argv);
262			// We currently never get past here, because QuitEmulator() does an exit()
263
264			// Exit system routines
265			SysExit();
266
267			// Exit preferences
268			PrefsExit();
269
270			return i;
271			}
272
273	nigel	1.7	#define QuitEmulator() { QuitEmuNoExit() ; return NO; }
274	nigel	1.1
275			bool InitEmulator (void)
276			{
277			char str[256];
278
279
280	nigel	1.10	// Install the handler for SIGSEGV
281			if (!sigsegv_install_handler(sigsegv_handler)) {
282			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
283			ErrorAlert(str);
284			QuitEmulator();
285			}
286	nigel	1.8
287			// Register dump state function when we got mad after a segfault
288			sigsegv_set_dump_state(sigsegv_dump_state);
289
290	nigel	1.1	// Read RAM size
291			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
292			if (RAMSize < 1024*1024) {
293			WarningAlert(GetString(STR_SMALL_RAM_WARN));
294			RAMSize = 1024*1024;
295			}
296	nigel	1.15	if (RAMSize > 102310241024) // Cap to 1023MB (APD crashes at 1GB)
297			RAMSize = 102310241024;
298	nigel	1.1
299			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
300			RAMSize = RAMSize & -getpagesize(); // Round down to page boundary
301			#endif
302
303			// Initialize VM system
304			vm_init();
305
306	nigel	1.15	#ifdef USE_33BIT_ADDRESSING
307			// Speculatively enables 33-bit addressing
308			ThirtyThreeBitAddressing = true;
309			#endif
310
311	nigel	1.1	#if REAL_ADDRESSING
312			// Flag: RAM and ROM are contigously allocated from address 0
313			bool memory_mapped_from_zero = false;
314	nigel	1.15
315			// Make sure to map RAM & ROM at address 0 only on platforms that
316			// supports linker scripts to relocate the Basilisk II executable
317			// above 0x70000000
318			#if HAVE_LINKER_SCRIPT
319			const bool can_map_all_memory = true;
320			#else
321	nigel	1.1	const bool can_map_all_memory = false;
322			#endif
323
324			// Try to allocate all memory from 0x0000, if it is not known to crash
325	nigel	1.15	if (can_map_all_memory && (vm_acquire_mac_fixed(0, RAMSize + 0x100000) == 0)) {
326	nigel	1.1	D(bug("Could allocate RAM and ROM from 0x0000\n"));
327			memory_mapped_from_zero = true;
328			}
329	nigel	1.15
330	nigel	1.10	#ifndef PAGEZERO_HACK
331	nigel	1.1	// Otherwise, just create the Low Memory area (0x0000..0x2000)
332	nigel	1.15	else if (vm_acquire_mac_fixed(0, 0x2000) == 0) {
333	nigel	1.1	D(bug("Could allocate the Low Memory globals\n"));
334			lm_area_mapped = true;
335			}
336
337			// Exit on failure
338			else {
339			sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
340			ErrorAlert(str);
341			QuitEmulator();
342			}
343	nigel	1.10	#endif
344	nigel	1.4	#else
345			*str = 0; // Eliminate unused variable warning
346	nigel	1.10	#endif /* REAL_ADDRESSING */
347	nigel	1.1
348			// Create areas for Mac RAM and ROM
349			#if REAL_ADDRESSING
350			if (memory_mapped_from_zero) {
351			RAMBaseHost = (uint8 *)0;
352			ROMBaseHost = RAMBaseHost + RAMSize;
353			}
354			else
355			#endif
356			{
357	nigel	1.14	uint8 ram_rom_area = (uint8 )vm_acquire_mac(RAMSize + 0x100000);
358			if (ram_rom_area == VM_MAP_FAILED) {
359	nigel	1.1	ErrorAlert(STR_NO_MEM_ERR);
360			QuitEmulator();
361			}
362	nigel	1.14	RAMBaseHost = ram_rom_area;
363			ROMBaseHost = RAMBaseHost + RAMSize;
364	nigel	1.1	}
365
366			#if USE_SCRATCHMEM_SUBTERFUGE
367			// Allocate scratch memory
368	nigel	1.15	ScratchMem = (uint8 *)vm_acquire_mac(SCRATCH_MEM_SIZE);
369	nigel	1.1	if (ScratchMem == VM_MAP_FAILED) {
370			ErrorAlert(STR_NO_MEM_ERR);
371			QuitEmulator();
372			}
373			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
374			#endif
375
376			#if DIRECT_ADDRESSING
377			// RAMBaseMac shall always be zero
378			MEMBaseDiff = (uintptr)RAMBaseHost;
379			RAMBaseMac = 0;
380			ROMBaseMac = Host2MacAddr(ROMBaseHost);
381			#endif
382			#if REAL_ADDRESSING
383	nigel	1.15	RAMBaseMac = Host2MacAddr(RAMBaseHost);
384			ROMBaseMac = Host2MacAddr(ROMBaseHost);
385	nigel	1.1	#endif
386			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
387			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
388
389			// Get rom file path from preferences
390			const char *rom_path = PrefsFindString("rom");
391	nigel	1.6	if ( ! rom_path )
392			WarningAlert("No rom pathname set. Trying ./ROM");
393	nigel	1.1
394			// Load Mac ROM
395			int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
396			if (rom_fd < 0) {
397			ErrorAlert(STR_NO_ROM_FILE_ERR);
398			QuitEmulator();
399			}
400			printf(GetString(STR_READING_ROM_FILE));
401			ROMSize = lseek(rom_fd, 0, SEEK_END);
402			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
403			ErrorAlert(STR_ROM_SIZE_ERR);
404			close(rom_fd);
405			QuitEmulator();
406			}
407			lseek(rom_fd, 0, SEEK_SET);
408			if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
409			ErrorAlert(STR_ROM_FILE_READ_ERR);
410			close(rom_fd);
411			QuitEmulator();
412			}
413
414
415			// Initialize everything
416			if (!InitAll())
417			QuitEmulator();
418			D(bug("Initialization complete\n"));
419
420
421			#ifdef ENABLE_MON
422			// Setup SIGINT handler to enter mon
423			sigemptyset(&sigint_sa.sa_mask);
424			sigint_sa.sa_handler = (void (*)(int))sigint_handler;
425			sigint_sa.sa_flags = 0;
426			sigaction(SIGINT, &sigint_sa, NULL);
427			#endif
428
429
430			return YES;
431			}
432
433			#undef QuitEmulator()
434
435
436			/*
437			* Quit emulator
438			*/
439
440			void QuitEmuNoExit()
441			{
442			D(bug("QuitEmulator\n"));
443
444			// Exit 680x0 emulation
445			Exit680x0();
446
447			// Deinitialize everything
448			ExitAll();
449
450			// Free ROM/RAM areas
451			if (RAMBaseHost != VM_MAP_FAILED) {
452	nigel	1.14	vm_release(RAMBaseHost, RAMSize + 0x100000);
453	nigel	1.1	RAMBaseHost = NULL;
454	nigel	1.15	ROMBaseHost = NULL;
455	nigel	1.1	}
456
457			#if USE_SCRATCHMEM_SUBTERFUGE
458			// Delete scratch memory area
459			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
460			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
461			ScratchMem = NULL;
462			}
463			#endif
464
465			#if REAL_ADDRESSING
466			// Delete Low Memory area
467			if (lm_area_mapped)
468			vm_release(0, 0x2000);
469			#endif
470
471			// Exit VM wrappers
472			vm_exit();
473
474			// Exit system routines
475			SysExit();
476
477			// Exit preferences
478			PrefsExit();
479			}
480
481			void QuitEmulator(void)
482			{
483			QuitEmuNoExit();
484	nigel	1.6
485			// Stop run loop?
486			[NSApp terminate: nil];
487
488	nigel	1.1	exit(0);
489			}
490
491
492			/*
493			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
494			* or a dynamically recompiling emulator)
495			*/
496
497			void FlushCodeCache(void *start, uint32 size)
498			{
499	nigel	1.8	#if USE_JIT
500			if (UseJIT)
501	gbeauche	1.16	flush_icache_range((uint8 *)start, size);
502	nigel	1.8	#endif
503	nigel	1.1	}
504
505
506			/*
507			* SIGINT handler, enters mon
508			*/
509
510			#ifdef ENABLE_MON
511			static void sigint_handler(...)
512			{
513			uaecptr nextpc;
514			extern void m68k_dumpstate(uaecptr *nextpc);
515			m68k_dumpstate(&nextpc);
516			VideoQuitFullScreen();
517			char *arg[4] = {"mon", "-m", "-r", NULL};
518			mon(3, arg);
519			QuitEmulator();
520			}
521			#endif
522
523
524	nigel	1.14	#ifdef HAVE_PTHREADS
525			/*
526			* Pthread configuration
527			*/
528
529			void Set_pthread_attr(pthread_attr_t *attr, int priority)
530			{
531			pthread_attr_init(attr);
532			#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
533			// Some of these only work for superuser
534			if (geteuid() == 0) {
535			pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
536			pthread_attr_setschedpolicy(attr, SCHED_FIFO);
537			struct sched_param fifo_param;
538			fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO)
539			+ sched_get_priority_max(SCHED_FIFO))
540			/ 2 + priority);
541			pthread_attr_setschedparam(attr, &fifo_param);
542			}
543			if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
544			#ifdef PTHREAD_SCOPE_BOUND_NP
545			// If system scope is not available (eg. we're not running
546			// with CAP_SCHED_MGT capability on an SGI box), try bound
547			// scope. It exposes pthread scheduling to the kernel,
548			// without setting realtime priority.
549			pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
550			#endif
551			}
552			#endif
553			}
554			#endif // HAVE_PTHREADS
555
556
557	nigel	1.1	/*
558			* Mutexes
559			*/
560
561			#ifdef HAVE_PTHREADS
562
563			struct B2_mutex {
564	nigel	1.10	B2_mutex() {
565			pthread_mutexattr_t attr;
566			pthread_mutexattr_init(&attr);
567			// Initialize the mutex for priority inheritance --
568			// required for accurate timing.
569			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
570			pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
571			#endif
572			#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
573			pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
574			#endif
575			#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
576			pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
577			#endif
578			pthread_mutex_init(&m, &attr);
579			pthread_mutexattr_destroy(&attr);
580			}
581			~B2_mutex() {
582			pthread_mutex_trylock(&m); // Make sure it's locked before
583			pthread_mutex_unlock(&m); // unlocking it.
584			pthread_mutex_destroy(&m);
585			}
586	nigel	1.1	pthread_mutex_t m;
587			};
588
589			B2_mutex *B2_create_mutex(void)
590			{
591			return new B2_mutex;
592			}
593
594			void B2_lock_mutex(B2_mutex *mutex)
595			{
596			pthread_mutex_lock(&mutex->m);
597			}
598
599			void B2_unlock_mutex(B2_mutex *mutex)
600			{
601			pthread_mutex_unlock(&mutex->m);
602			}
603
604			void B2_delete_mutex(B2_mutex *mutex)
605			{
606			delete mutex;
607			}
608
609			#else
610
611			struct B2_mutex {
612			int dummy;
613			};
614
615			B2_mutex *B2_create_mutex(void)
616			{
617			return new B2_mutex;
618			}
619
620			void B2_lock_mutex(B2_mutex *mutex)
621			{
622			}
623
624			void B2_unlock_mutex(B2_mutex *mutex)
625			{
626			}
627
628			void B2_delete_mutex(B2_mutex *mutex)
629			{
630			delete mutex;
631			}
632
633			#endif
634
635
636			/*
637			* Interrupt flags (must be handled atomically!)
638			*/
639
640			uint32 InterruptFlags = 0;
641
642			void SetInterruptFlag(uint32 flag)
643			{
644			LOCK_INTFLAGS;
645			InterruptFlags \|= flag;
646			UNLOCK_INTFLAGS;
647			}
648
649			void ClearInterruptFlag(uint32 flag)
650			{
651			LOCK_INTFLAGS;
652			InterruptFlags &= ~flag;
653			UNLOCK_INTFLAGS;
654			}
655
656
657			/*
658			* Display error alert
659			*/
660
661			void ErrorAlert(const char *text)
662			{
663			NSString *title = [NSString stringWithCString:
664			GetString(STR_ERROR_ALERT_TITLE) ];
665			NSString *error = [NSString stringWithCString: text];
666			NSString *button = [NSString stringWithCString: GetString(STR_QUIT_BUTTON) ];
667
668			NSLog(error);
669	nigel	1.10	if ( PrefsFindBool("nogui") )
670			return;
671			VideoQuitFullScreen();
672	nigel	1.1	NSRunCriticalAlertPanel(title, error, button, nil, nil);
673			}
674
675
676			/*
677			* Display warning alert
678			*/
679
680			void WarningAlert(const char *text)
681			{
682			NSString *title = [NSString stringWithCString:
683			GetString(STR_WARNING_ALERT_TITLE) ];
684			NSString *warning = [NSString stringWithCString: text];
685			NSString *button = [NSString stringWithCString: GetString(STR_OK_BUTTON) ];
686
687			NSLog(warning);
688	nigel	1.10	if ( PrefsFindBool("nogui") )
689			return;
690			VideoQuitFullScreen();
691	nigel	1.1	NSRunAlertPanel(title, warning, button, nil, nil);
692			}
693
694
695			/*
696			* Display choice alert
697			*/
698
699			bool ChoiceAlert(const char text, const char pos, const char *neg)
700			{
701			NSString *title = [NSString stringWithCString:
702			GetString(STR_WARNING_ALERT_TITLE) ];
703			NSString *warning = [NSString stringWithCString: text];
704			NSString *yes = [NSString stringWithCString: pos];
705			NSString *no = [NSString stringWithCString: neg];
706
707			return NSRunInformationalAlertPanel(title, warning, yes, no, nil);
708			}