src/Windows/main_windows.cpp

/*
 *  main_windows.cpp - Startup code for Windows
 *
 *  Basilisk II (C) 1997-2004 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
 */

#include "sysdeps.h"

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>

#include <SDL.h>
#include <SDL_mutex.h>
#include <SDL_thread.h>

#include <string>
using std::string;

#include "cpu_emulation.h"
#include "sys.h"
#include "rom_patches.h"
#include "xpram.h"
#include "timer.h"
#include "video.h"
#include "cdrom.h"
#include "emul_op.h"
#include "prefs.h"
#include "prefs_editor.h"
#include "macos_util.h"
#include "user_strings.h"
#include "version.h"
#include "main.h"
#include "vm_alloc.h"
#include "sigsegv.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"


// 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
static uint8 last_xpram[XPRAM_SIZE];                            // Buffer for monitoring XPRAM changes

static bool xpram_thread_active = false;                        // Flag: XPRAM watchdog installed
static volatile bool xpram_thread_cancel = false;       // Flag: Cancel XPRAM thread
static SDL_Thread *xpram_thread = NULL;                         // XPRAM watchdog

static bool tick_thread_active = false;                         // Flag: 60Hz thread installed
static volatile bool tick_thread_cancel = false;        // Flag: Cancel 60Hz thread
static SDL_Thread *tick_thread;                                         // 60Hz thread

static SDL_mutex *intflag_lock = NULL;                          // Mutex to protect InterruptFlags
#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)

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

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


// Prototypes
static int xpram_func(void *arg);
static int tick_func(void *arg);
static void one_tick(...);


/*
 *  Ersatz functions
 */

extern "C" {

#ifndef HAVE_STRDUP
char *strdup(const char *s)
{
        char *n = (char *)malloc(strlen(s) + 1);
        strcpy(n, s);
        return n;
}
#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"
                "\nUnix options:\n"
                "  --config FILE\n    read/write configuration from/to FILE\n"
                "  --display STRING\n    X display to use\n"
                "  --break ADDRESS\n    set ROM breakpoint\n"
                "  --rominfo\n    dump ROM information\n", prg_name
        );
        LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
        PrefsPrintUsage();
        exit(0);
}

int main(int argc, char **argv)
{
        char str[256];
        bool cd_boot = false;

        // 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 (strcmp(argv[i], "--break") == 0) {
                        argv[i++] = NULL;
                        if (i < argc) {
                                ROMBreakpoint = strtol(argv[i], NULL, 0);
                                argv[i] = NULL;
                        }
                } 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) {
                        argv[i] = NULL;
                        PrintROMInfo = true;
                } else if (strcmp(argv[i], "--cdboot") == 0) {
                        argv[i] = NULL;
                        cd_boot = true;
                }
        }

        // Remove processed arguments
        for (int i=1; i<argc; i++) {
                int k;
                for (k=i; k<argc; k++)
                        if (argv[k] != NULL)
                                break;
                if (k > i) {
                        k -= i;
                        for (int j=i+k; j<argc; j++)
                                argv[j-k] = argv[j];
                        argc -= k;
                }
        }

        // Read preferences
        PrefsInit(argc, argv);

        // Boot MacOS from CD-ROM?
        if (cd_boot)
                PrefsReplaceInt32("bootdriver", CDROMRefNum);

        // Any command line arguments left?
        for (int i=1; i<argc; i++) {
                if (argv[i][0] == '-') {
                        fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
                        usage(argv[0]);
                }
        }

        // Check we are using a Windows NT kernel >= 4.0
        OSVERSIONINFO osvi;
        ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
        osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
        if (!GetVersionEx(&osvi) || osvi.dwPlatformId != VER_PLATFORM_WIN32_NT || osvi.dwMajorVersion < 4) {
                ErrorAlert(STR_NO_WIN32_NT_4);
                QuitEmulator();
        }

        // Initialize SDL system
        int sdl_flags = 0;
#ifdef USE_SDL_VIDEO
        sdl_flags |= SDL_INIT_VIDEO;
#endif
#ifdef USE_SDL_AUDIO
        sdl_flags |= SDL_INIT_AUDIO;
#endif
        assert(sdl_flags != 0);
        if (SDL_Init(sdl_flags) == -1) {
                char str[256];
                sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
                ErrorAlert(str);
                QuitEmulator();
        }
        atexit(SDL_Quit);

        // Init system routines
        SysInit();

        // Show preferences editor
        if (!PrefsFindBool("nogui"))
                if (!PrefsEditor())
                        QuitEmulator();

        // 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;
        }
        
        // Initialize VM system
        vm_init();

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

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

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

        // Load Mac ROM
        HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
                                                           GENERIC_READ,
                                                           0, NULL,
                                                           OPEN_EXISTING,
                                                           FILE_ATTRIBUTE_NORMAL,
                                                           NULL);
        if (rom_fh == INVALID_HANDLE_VALUE) {
                ErrorAlert(STR_NO_ROM_FILE_ERR);
                QuitEmulator();
        }
        printf(GetString(STR_READING_ROM_FILE));
        ROMSize = GetFileSize(rom_fh, NULL);
        if (ROMSize != 64*1024 && ROMSize != 128*1024 && ROMSize != 256*1024 && ROMSize != 512*1024 && ROMSize != 1024*1024) {
                ErrorAlert(STR_ROM_SIZE_ERR);
                CloseHandle(rom_fh);
                QuitEmulator();
        }
        DWORD bytes_read;
        if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 || bytes_read != ROMSize) {
                ErrorAlert(STR_ROM_FILE_READ_ERR);
                CloseHandle(rom_fh);
                QuitEmulator();
        }

        // Initialize native timers
        timer_init();

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

        // SDL threads available, start 60Hz thread
        tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
        if (!tick_thread_active) {
                sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
                ErrorAlert(str);
                QuitEmulator();
        }
        D(bug("60Hz thread started\n"));

        // Start XPRAM watchdog thread
        memcpy(last_xpram, XPRAM, XPRAM_SIZE);
        xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
        D(bug("XPRAM thread started\n"));

        // Start 68k and jump to ROM boot routine
        D(bug("Starting emulation...\n"));
        Start680x0();

        QuitEmulator();
        return 0;
}


/*
 *  Quit emulator
 */

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

        // Exit 680x0 emulation
        Exit680x0();

        // Stop 60Hz thread
        if (tick_thread_active) {
                tick_thread_cancel = true;
                SDL_WaitThread(tick_thread, NULL);
        }

        // Stop XPRAM watchdog thread
        if (xpram_thread_active) {
                xpram_thread_cancel = true;
                SDL_WaitThread(xpram_thread, NULL);
        }

        // Deinitialize everything
        ExitAll();

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

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

        // Exit VM wrappers
        vm_exit();

        // Exit system routines
        SysExit();

        // Exit preferences
        PrefsExit();

        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
}


/*
 *  Mutexes
 */

struct B2_mutex {
        B2_mutex() { m = SDL_CreateMutex(); }
        ~B2_mutex() { if (m) SDL_DestroyMutex(m); }
        SDL_mutex *m;
};

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

void B2_lock_mutex(B2_mutex *mutex)
{
        if (mutex)
                SDL_LockMutex(mutex->m);
}

void B2_unlock_mutex(B2_mutex *mutex)
{
        if (mutex)
                SDL_UnlockMutex(mutex->m);
}

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


/*
 *  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;
}


/*
 *  XPRAM watchdog thread (saves XPRAM every minute)
 */

static void xpram_watchdog(void)
{
        if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
                memcpy(last_xpram, XPRAM, XPRAM_SIZE);
                SaveXPRAM();
        }
}

static int xpram_func(void *arg)
{
        while (!xpram_thread_cancel) {
                for (int i=0; i<60 && !xpram_thread_cancel; i++)
                        Delay_usec(999999);             // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
                xpram_watchdog();
        }
        return 0;
}


/*
 *  60Hz thread (really 60.15Hz)
 */

static void one_second(void)
{
        // Pseudo Mac 1Hz interrupt, update local time
        WriteMacInt32(0x20c, TimerDateTime());

        SetInterruptFlag(INTFLAG_1HZ);
        TriggerInterrupt();
}

static void one_tick(...)
{
        static int tick_counter = 0;
        if (++tick_counter > 60) {
                tick_counter = 0;
                one_second();
        }

        // Trigger 60Hz interrupt
        if (ROMVersion != ROM_VERSION_CLASSIC || HasMacStarted()) {
                SetInterruptFlag(INTFLAG_60HZ);
                TriggerInterrupt();
        }
}

static int tick_func(void *arg)
{
        uint64 start = GetTicks_usec();
        int64 ticks = 0;
        uint64 next = GetTicks_usec();
        while (!tick_thread_cancel) {
                one_tick();
                next += 16625;
                int64 delay = next - GetTicks_usec();
                if (delay > 0)
                        Delay_usec(delay);
                else if (delay < -16625)
                        next = GetTicks_usec();
                ticks++;
        }
        uint64 end = GetTicks_usec();
        D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
        return 0;
}


/*
 *  Get the main window handle
 */

#ifdef USE_SDL_VIDEO
#include <SDL_syswm.h>
static HWND GetMainWindowHandle(void)
{
        SDL_SysWMinfo wmInfo;
        wmInfo.version.major = SDL_MAJOR_VERSION;
        wmInfo.version.minor = SDL_MINOR_VERSION;
        wmInfo.version.patch = SDL_PATCHLEVEL;
        return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
}
#endif


/*
 *  Display alert
 */

static void display_alert(int title_id, const char *text, int flags)
{
        HWND hMainWnd = GetMainWindowHandle();
        MessageBox(hMainWnd, text, GetString(title_id), MB_OK | flags);
}


/*
 *  Display error alert
 */

void ErrorAlert(const char *text)
{
        if (PrefsFindBool("nogui"))
                return;

        VideoQuitFullScreen();
        display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
}


/*
 *  Display warning alert
 */

void WarningAlert(const char *text)
{
        if (PrefsFindBool("nogui"))
                return;

        display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
}


/*
 *  Display choice alert
 */

bool ChoiceAlert(const char *text, const char *pos, const char *neg)
{
        printf(GetString(STR_SHELL_WARNING_PREFIX), text);
        return false;   //!!
}
Revision:	1.3
Committed:	2004-12-05T15:28:39Z (19 years, 9 months ago) by gbeauche
Branch:	MAIN
Changes since 1.2:	+9 -0 lines
Log Message:	add --cdboot command line option akin to MoL's
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* main_windows.cpp - Startup code for Windows
3			*
4			* Basilisk II (C) 1997-2004 Christian Bauer
5			*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sysdeps.h"
22
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <signal.h>
26			#include <errno.h>
27
28			#include <SDL.h>
29			#include <SDL_mutex.h>
30			#include <SDL_thread.h>
31
32			#include <string>
33			using std::string;
34
35			#include "cpu_emulation.h"
36			#include "sys.h"
37			#include "rom_patches.h"
38			#include "xpram.h"
39			#include "timer.h"
40			#include "video.h"
41	gbeauche	1.3	#include "cdrom.h"
42	gbeauche	1.1	#include "emul_op.h"
43			#include "prefs.h"
44			#include "prefs_editor.h"
45			#include "macos_util.h"
46			#include "user_strings.h"
47			#include "version.h"
48			#include "main.h"
49			#include "vm_alloc.h"
50			#include "sigsegv.h"
51
52			#if USE_JIT
53			extern void flush_icache_range(uint32 start, uint32 size); // from compemu_support.cpp
54			#endif
55
56			#ifdef ENABLE_MON
57			# include "mon.h"
58			#endif
59
60			#define DEBUG 0
61			#include "debug.h"
62
63
64			// Constants
65			const char ROM_FILE_NAME[] = "ROM";
66			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
67
68
69			// CPU and FPU type, addressing mode
70			int CPUType;
71			bool CPUIs68060;
72			int FPUType;
73			bool TwentyFourBitAddressing;
74			bool ThirtyThreeBitAddressing = false;
75
76
77			// Global variables
78			static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
79
80			static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
81			static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
82			static SDL_Thread *xpram_thread = NULL; // XPRAM watchdog
83
84			static bool tick_thread_active = false; // Flag: 60Hz thread installed
85			static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
86			static SDL_Thread *tick_thread; // 60Hz thread
87
88			static SDL_mutex *intflag_lock = NULL; // Mutex to protect InterruptFlags
89			#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
90			#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)
91
92			#if USE_SCRATCHMEM_SUBTERFUGE
93			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
94			#endif
95
96			#if REAL_ADDRESSING
97			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
98			#endif
99
100
101			// Prototypes
102			static int xpram_func(void *arg);
103			static int tick_func(void *arg);
104			static void one_tick(...);
105
106
107			/*
108			* Ersatz functions
109			*/
110
111			extern "C" {
112
113			#ifndef HAVE_STRDUP
114			char strdup(const char s)
115			{
116			char n = (char )malloc(strlen(s) + 1);
117			strcpy(n, s);
118			return n;
119			}
120			#endif
121
122			}
123
124
125			/*
126			* Map memory that can be accessed from the Mac side
127			*/
128
129			void *vm_acquire_mac(size_t size)
130			{
131			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
132			if (m == NULL) {
133			ThirtyThreeBitAddressing = false;
134			m = vm_acquire(size);
135			}
136			return m;
137			}
138
139
140			/*
141			* SIGSEGV handler
142			*/
143
144			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
145			{
146			#if ENABLE_VOSF
147			// Handle screen fault
148			extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
149			if (Screen_fault_handler(fault_address, fault_instruction))
150			return SIGSEGV_RETURN_SUCCESS;
151			#endif
152
153			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
154			// Ignore writes to ROM
155			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
156			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
157
158			// Ignore all other faults, if requested
159			if (PrefsFindBool("ignoresegv"))
160			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
161			#endif
162
163			return SIGSEGV_RETURN_FAILURE;
164			}
165
166			/*
167			* Dump state when everything went wrong after a SEGV
168			*/
169
170			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
171			{
172			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
173			if (fault_instruction != SIGSEGV_INVALID_PC)
174			fprintf(stderr, " [IP=%p]", fault_instruction);
175			fprintf(stderr, "\n");
176			uaecptr nextpc;
177			extern void m68k_dumpstate(uaecptr *nextpc);
178			m68k_dumpstate(&nextpc);
179			#if USE_JIT && JIT_DEBUG
180			extern void compiler_dumpstate(void);
181			compiler_dumpstate();
182			#endif
183			VideoQuitFullScreen();
184			#ifdef ENABLE_MON
185			char *arg[4] = {"mon", "-m", "-r", NULL};
186			mon(3, arg);
187			QuitEmulator();
188			#endif
189			}
190
191
192			/*
193			* Main program
194			*/
195
196			static void usage(const char *prg_name)
197			{
198			printf(
199			"Usage: %s [OPTION...]\n"
200			"\nUnix options:\n"
201			" --config FILE\n read/write configuration from/to FILE\n"
202			" --display STRING\n X display to use\n"
203			" --break ADDRESS\n set ROM breakpoint\n"
204			" --rominfo\n dump ROM information\n", prg_name
205			);
206			LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
207			PrefsPrintUsage();
208			exit(0);
209			}
210
211			int main(int argc, char **argv)
212			{
213			char str[256];
214	gbeauche	1.3	bool cd_boot = false;
215	gbeauche	1.1
216			// Initialize variables
217			RAMBaseHost = NULL;
218			ROMBaseHost = NULL;
219			srand(time(NULL));
220			tzset();
221
222			// Print some info
223			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
224			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
225
226			// Parse command line arguments
227			for (int i=1; i<argc; i++) {
228			if (strcmp(argv[i], "--help") == 0) {
229			usage(argv[0]);
230			} else if (strcmp(argv[i], "--break") == 0) {
231			argv[i++] = NULL;
232			if (i < argc) {
233			ROMBreakpoint = strtol(argv[i], NULL, 0);
234			argv[i] = NULL;
235			}
236			} else if (strcmp(argv[i], "--config") == 0) {
237			argv[i++] = NULL;
238			if (i < argc) {
239			extern string UserPrefsPath; // from prefs_unix.cpp
240			UserPrefsPath = argv[i];
241			argv[i] = NULL;
242			}
243			} else if (strcmp(argv[i], "--rominfo") == 0) {
244			argv[i] = NULL;
245			PrintROMInfo = true;
246	gbeauche	1.3	} else if (strcmp(argv[i], "--cdboot") == 0) {
247			argv[i] = NULL;
248			cd_boot = true;
249	gbeauche	1.1	}
250			}
251
252			// Remove processed arguments
253			for (int i=1; i<argc; i++) {
254			int k;
255			for (k=i; k<argc; k++)
256			if (argv[k] != NULL)
257			break;
258			if (k > i) {
259			k -= i;
260			for (int j=i+k; j<argc; j++)
261			argv[j-k] = argv[j];
262			argc -= k;
263			}
264			}
265
266			// Read preferences
267			PrefsInit(argc, argv);
268
269	gbeauche	1.3	// Boot MacOS from CD-ROM?
270			if (cd_boot)
271			PrefsReplaceInt32("bootdriver", CDROMRefNum);
272
273	gbeauche	1.1	// Any command line arguments left?
274			for (int i=1; i<argc; i++) {
275			if (argv[i][0] == '-') {
276			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
277			usage(argv[0]);
278			}
279			}
280
281	gbeauche	1.2	// Check we are using a Windows NT kernel >= 4.0
282			OSVERSIONINFO osvi;
283			ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
284			osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
285			if (!GetVersionEx(&osvi) \|\| osvi.dwPlatformId != VER_PLATFORM_WIN32_NT \|\| osvi.dwMajorVersion < 4) {
286			ErrorAlert(STR_NO_WIN32_NT_4);
287			QuitEmulator();
288			}
289
290	gbeauche	1.1	// Initialize SDL system
291			int sdl_flags = 0;
292			#ifdef USE_SDL_VIDEO
293			sdl_flags \|= SDL_INIT_VIDEO;
294			#endif
295			#ifdef USE_SDL_AUDIO
296			sdl_flags \|= SDL_INIT_AUDIO;
297			#endif
298			assert(sdl_flags != 0);
299			if (SDL_Init(sdl_flags) == -1) {
300			char str[256];
301			sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
302			ErrorAlert(str);
303			QuitEmulator();
304			}
305			atexit(SDL_Quit);
306
307			// Init system routines
308			SysInit();
309
310			// Show preferences editor
311			if (!PrefsFindBool("nogui"))
312			if (!PrefsEditor())
313			QuitEmulator();
314
315			// Install the handler for SIGSEGV
316			if (!sigsegv_install_handler(sigsegv_handler)) {
317			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
318			ErrorAlert(str);
319			QuitEmulator();
320			}
321
322			// Register dump state function when we got mad after a segfault
323			sigsegv_set_dump_state(sigsegv_dump_state);
324
325			// Read RAM size
326			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
327			if (RAMSize < 1024*1024) {
328			WarningAlert(GetString(STR_SMALL_RAM_WARN));
329			RAMSize = 1024*1024;
330			}
331
332			// Initialize VM system
333			vm_init();
334
335			// Create areas for Mac RAM and ROM
336			#ifdef USE_33BIT_ADDRESSING
337			// Speculatively enables 33-bit addressing
338			ThirtyThreeBitAddressing = true;
339			#endif
340			RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
341			ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
342			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
343			ErrorAlert(STR_NO_MEM_ERR);
344			QuitEmulator();
345			}
346
347			#if USE_SCRATCHMEM_SUBTERFUGE
348			// Allocate scratch memory
349			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
350			if (ScratchMem == VM_MAP_FAILED) {
351			ErrorAlert(STR_NO_MEM_ERR);
352			QuitEmulator();
353			}
354			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
355			#endif
356
357			#if DIRECT_ADDRESSING
358			// RAMBaseMac shall always be zero
359			MEMBaseDiff = (uintptr)RAMBaseHost;
360			RAMBaseMac = 0;
361			ROMBaseMac = Host2MacAddr(ROMBaseHost);
362			#endif
363			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
364			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
365
366			// Get rom file path from preferences
367			const char *rom_path = PrefsFindString("rom");
368
369			// Load Mac ROM
370			HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
371			GENERIC_READ,
372			0, NULL,
373			OPEN_EXISTING,
374			FILE_ATTRIBUTE_NORMAL,
375			NULL);
376			if (rom_fh == INVALID_HANDLE_VALUE) {
377			ErrorAlert(STR_NO_ROM_FILE_ERR);
378			QuitEmulator();
379			}
380			printf(GetString(STR_READING_ROM_FILE));
381			ROMSize = GetFileSize(rom_fh, NULL);
382			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
383			ErrorAlert(STR_ROM_SIZE_ERR);
384			CloseHandle(rom_fh);
385			QuitEmulator();
386			}
387			DWORD bytes_read;
388			if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 \|\| bytes_read != ROMSize) {
389			ErrorAlert(STR_ROM_FILE_READ_ERR);
390			CloseHandle(rom_fh);
391			QuitEmulator();
392			}
393
394			// Initialize native timers
395			timer_init();
396
397			// Initialize everything
398			if (!InitAll())
399			QuitEmulator();
400			D(bug("Initialization complete\n"));
401
402			// SDL threads available, start 60Hz thread
403			tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
404			if (!tick_thread_active) {
405			sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
406			ErrorAlert(str);
407			QuitEmulator();
408			}
409			D(bug("60Hz thread started\n"));
410
411			// Start XPRAM watchdog thread
412			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
413			xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
414			D(bug("XPRAM thread started\n"));
415
416			// Start 68k and jump to ROM boot routine
417			D(bug("Starting emulation...\n"));
418			Start680x0();
419
420			QuitEmulator();
421			return 0;
422			}
423
424
425			/*
426			* Quit emulator
427			*/
428
429			void QuitEmulator(void)
430			{
431			D(bug("QuitEmulator\n"));
432
433			// Exit 680x0 emulation
434			Exit680x0();
435
436			// Stop 60Hz thread
437			if (tick_thread_active) {
438			tick_thread_cancel = true;
439			SDL_WaitThread(tick_thread, NULL);
440			}
441
442			// Stop XPRAM watchdog thread
443			if (xpram_thread_active) {
444			xpram_thread_cancel = true;
445			SDL_WaitThread(xpram_thread, NULL);
446			}
447
448			// Deinitialize everything
449			ExitAll();
450
451			// Free ROM/RAM areas
452			if (RAMBaseHost != VM_MAP_FAILED) {
453			vm_release(RAMBaseHost, RAMSize);
454			RAMBaseHost = NULL;
455			}
456			if (ROMBaseHost != VM_MAP_FAILED) {
457			vm_release(ROMBaseHost, 0x100000);
458			ROMBaseHost = NULL;
459			}
460
461			#if USE_SCRATCHMEM_SUBTERFUGE
462			// Delete scratch memory area
463			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
464			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
465			ScratchMem = NULL;
466			}
467			#endif
468
469			// Exit VM wrappers
470			vm_exit();
471
472			// Exit system routines
473			SysExit();
474
475			// Exit preferences
476			PrefsExit();
477
478			exit(0);
479			}
480
481
482			/*
483			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
484			* or a dynamically recompiling emulator)
485			*/
486
487			void FlushCodeCache(void *start, uint32 size)
488			{
489			#if USE_JIT
490			if (UseJIT)
491			flush_icache_range((uintptr)start, size);
492			#endif
493			}
494
495
496			/*
497			* Mutexes
498			*/
499
500			struct B2_mutex {
501			B2_mutex() { m = SDL_CreateMutex(); }
502			~B2_mutex() { if (m) SDL_DestroyMutex(m); }
503			SDL_mutex *m;
504			};
505
506			B2_mutex *B2_create_mutex(void)
507			{
508			return new B2_mutex;
509			}
510
511			void B2_lock_mutex(B2_mutex *mutex)
512			{
513			if (mutex)
514			SDL_LockMutex(mutex->m);
515			}
516
517			void B2_unlock_mutex(B2_mutex *mutex)
518			{
519			if (mutex)
520			SDL_UnlockMutex(mutex->m);
521			}
522
523			void B2_delete_mutex(B2_mutex *mutex)
524			{
525			delete mutex;
526			}
527
528
529			/*
530			* Interrupt flags (must be handled atomically!)
531			*/
532
533			uint32 InterruptFlags = 0;
534
535			void SetInterruptFlag(uint32 flag)
536			{
537			LOCK_INTFLAGS;
538			InterruptFlags \|= flag;
539			UNLOCK_INTFLAGS;
540			}
541
542			void ClearInterruptFlag(uint32 flag)
543			{
544			LOCK_INTFLAGS;
545			InterruptFlags &= ~flag;
546			UNLOCK_INTFLAGS;
547			}
548
549
550			/*
551			* XPRAM watchdog thread (saves XPRAM every minute)
552			*/
553
554			static void xpram_watchdog(void)
555			{
556			if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
557			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
558			SaveXPRAM();
559			}
560			}
561
562			static int xpram_func(void *arg)
563			{
564			while (!xpram_thread_cancel) {
565			for (int i=0; i<60 && !xpram_thread_cancel; i++)
566			Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
567			xpram_watchdog();
568			}
569			return 0;
570			}
571
572
573			/*
574			* 60Hz thread (really 60.15Hz)
575			*/
576
577			static void one_second(void)
578			{
579			// Pseudo Mac 1Hz interrupt, update local time
580			WriteMacInt32(0x20c, TimerDateTime());
581
582			SetInterruptFlag(INTFLAG_1HZ);
583			TriggerInterrupt();
584			}
585
586			static void one_tick(...)
587			{
588			static int tick_counter = 0;
589			if (++tick_counter > 60) {
590			tick_counter = 0;
591			one_second();
592			}
593
594			// Trigger 60Hz interrupt
595			if (ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted()) {
596			SetInterruptFlag(INTFLAG_60HZ);
597			TriggerInterrupt();
598			}
599			}
600
601			static int tick_func(void *arg)
602			{
603			uint64 start = GetTicks_usec();
604			int64 ticks = 0;
605			uint64 next = GetTicks_usec();
606			while (!tick_thread_cancel) {
607			one_tick();
608			next += 16625;
609			int64 delay = next - GetTicks_usec();
610			if (delay > 0)
611			Delay_usec(delay);
612			else if (delay < -16625)
613			next = GetTicks_usec();
614			ticks++;
615			}
616			uint64 end = GetTicks_usec();
617			D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
618			return 0;
619			}
620
621
622			/*
623	gbeauche	1.2	* Get the main window handle
624	gbeauche	1.1	*/
625
626	gbeauche	1.2	#ifdef USE_SDL_VIDEO
627			#include <SDL_syswm.h>
628			static HWND GetMainWindowHandle(void)
629	gbeauche	1.1	{
630	gbeauche	1.2	SDL_SysWMinfo wmInfo;
631			wmInfo.version.major = SDL_MAJOR_VERSION;
632			wmInfo.version.minor = SDL_MINOR_VERSION;
633			wmInfo.version.patch = SDL_PATCHLEVEL;
634			return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
635	gbeauche	1.1	}
636	gbeauche	1.2	#endif
637	gbeauche	1.1
638
639	gbeauche	1.2	/*
640			* Display alert
641			*/
642
643			static void display_alert(int title_id, const char *text, int flags)
644	gbeauche	1.1	{
645	gbeauche	1.2	HWND hMainWnd = GetMainWindowHandle();
646			MessageBox(hMainWnd, text, GetString(title_id), MB_OK \| flags);
647	gbeauche	1.1	}
648
649
650			/*
651			* Display error alert
652			*/
653
654			void ErrorAlert(const char *text)
655			{
656	gbeauche	1.2	if (PrefsFindBool("nogui"))
657	gbeauche	1.1	return;
658	gbeauche	1.2
659	gbeauche	1.1	VideoQuitFullScreen();
660	gbeauche	1.2	display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
661	gbeauche	1.1	}
662
663
664			/*
665			* Display warning alert
666			*/
667
668			void WarningAlert(const char *text)
669			{
670	gbeauche	1.2	if (PrefsFindBool("nogui"))
671	gbeauche	1.1	return;
672	gbeauche	1.2
673			display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
674	gbeauche	1.1	}
675
676
677			/*
678			* Display choice alert
679			*/
680
681			bool ChoiceAlert(const char text, const char pos, const char *neg)
682			{
683			printf(GetString(STR_SHELL_WARNING_PREFIX), text);
684			return false; //!!
685			}