src/Windows/main_windows.cpp

/*
 *  main_windows.cpp - Startup code for Windows
 *
 *  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
 */

#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"
#include "util_windows.h"
#include "kernel_windows.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)

DWORD win_os;                                                                           // Windows OS id
DWORD win_os_major;                                                                     // Windows OS version major

#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)) {
                ErrorAlert("Could not determine OS type");
                QuitEmulator();
        }
        win_os = osvi.dwPlatformId;
        win_os_major = osvi.dwMajorVersion;
        if (win_os != VER_PLATFORM_WIN32_NT || win_os_major < 4) {
                ErrorAlert(STR_NO_WIN32_NT_4);
                QuitEmulator();
        }

        // Check that drivers are installed
        if (!check_drivers())
                QuitEmulator();

        // Load win32 libraries
        KernelInit();

        // 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();

        // Release win32 libraries
        KernelExit();

        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:	1.6
Committed:	2005-03-19T19:01:49Z (19 years, 2 months ago) by gbeauche
Branch:	MAIN
Changes since 1.5:	+5 -0 lines
Log Message:	Check that drivers are installed (e.g. CD-ROM driver)
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* main_windows.cpp - Startup code for Windows
3			*
4	gbeauche	1.5	* Basilisk II (C) 1997-2005 Christian Bauer
5	gbeauche	1.1	*
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	gbeauche	1.6	#include "util_windows.h"
52	gbeauche	1.4	#include "kernel_windows.h"
53	gbeauche	1.1
54			#if USE_JIT
55			extern void flush_icache_range(uint32 start, uint32 size); // from compemu_support.cpp
56			#endif
57
58			#ifdef ENABLE_MON
59			# include "mon.h"
60			#endif
61
62			#define DEBUG 0
63			#include "debug.h"
64
65
66			// Constants
67			const char ROM_FILE_NAME[] = "ROM";
68			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
69
70
71			// CPU and FPU type, addressing mode
72			int CPUType;
73			bool CPUIs68060;
74			int FPUType;
75			bool TwentyFourBitAddressing;
76			bool ThirtyThreeBitAddressing = false;
77
78
79			// Global variables
80			static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
81
82			static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
83			static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
84			static SDL_Thread *xpram_thread = NULL; // XPRAM watchdog
85
86			static bool tick_thread_active = false; // Flag: 60Hz thread installed
87			static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
88			static SDL_Thread *tick_thread; // 60Hz thread
89
90			static SDL_mutex *intflag_lock = NULL; // Mutex to protect InterruptFlags
91			#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
92			#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)
93
94	gbeauche	1.4	DWORD win_os; // Windows OS id
95			DWORD win_os_major; // Windows OS version major
96
97	gbeauche	1.1	#if USE_SCRATCHMEM_SUBTERFUGE
98			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
99			#endif
100
101			#if REAL_ADDRESSING
102			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
103			#endif
104
105
106			// Prototypes
107			static int xpram_func(void *arg);
108			static int tick_func(void *arg);
109			static void one_tick(...);
110
111
112			/*
113			* Ersatz functions
114			*/
115
116			extern "C" {
117
118			#ifndef HAVE_STRDUP
119			char strdup(const char s)
120			{
121			char n = (char )malloc(strlen(s) + 1);
122			strcpy(n, s);
123			return n;
124			}
125			#endif
126
127			}
128
129
130			/*
131			* Map memory that can be accessed from the Mac side
132			*/
133
134			void *vm_acquire_mac(size_t size)
135			{
136			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
137			if (m == NULL) {
138			ThirtyThreeBitAddressing = false;
139			m = vm_acquire(size);
140			}
141			return m;
142			}
143
144
145			/*
146			* SIGSEGV handler
147			*/
148
149			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
150			{
151			#if ENABLE_VOSF
152			// Handle screen fault
153			extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
154			if (Screen_fault_handler(fault_address, fault_instruction))
155			return SIGSEGV_RETURN_SUCCESS;
156			#endif
157
158			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
159			// Ignore writes to ROM
160			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
161			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
162
163			// Ignore all other faults, if requested
164			if (PrefsFindBool("ignoresegv"))
165			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
166			#endif
167
168			return SIGSEGV_RETURN_FAILURE;
169			}
170
171			/*
172			* Dump state when everything went wrong after a SEGV
173			*/
174
175			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
176			{
177			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
178			if (fault_instruction != SIGSEGV_INVALID_PC)
179			fprintf(stderr, " [IP=%p]", fault_instruction);
180			fprintf(stderr, "\n");
181			uaecptr nextpc;
182			extern void m68k_dumpstate(uaecptr *nextpc);
183			m68k_dumpstate(&nextpc);
184			#if USE_JIT && JIT_DEBUG
185			extern void compiler_dumpstate(void);
186			compiler_dumpstate();
187			#endif
188			VideoQuitFullScreen();
189			#ifdef ENABLE_MON
190			char *arg[4] = {"mon", "-m", "-r", NULL};
191			mon(3, arg);
192			QuitEmulator();
193			#endif
194			}
195
196
197			/*
198			* Main program
199			*/
200
201			static void usage(const char *prg_name)
202			{
203			printf(
204			"Usage: %s [OPTION...]\n"
205			"\nUnix options:\n"
206			" --config FILE\n read/write configuration from/to FILE\n"
207			" --display STRING\n X display to use\n"
208			" --break ADDRESS\n set ROM breakpoint\n"
209			" --rominfo\n dump ROM information\n", prg_name
210			);
211			LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
212			PrefsPrintUsage();
213			exit(0);
214			}
215
216			int main(int argc, char **argv)
217			{
218			char str[256];
219	gbeauche	1.3	bool cd_boot = false;
220	gbeauche	1.1
221			// Initialize variables
222			RAMBaseHost = NULL;
223			ROMBaseHost = NULL;
224			srand(time(NULL));
225			tzset();
226
227			// Print some info
228			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
229			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
230
231			// Parse command line arguments
232			for (int i=1; i<argc; i++) {
233			if (strcmp(argv[i], "--help") == 0) {
234			usage(argv[0]);
235			} else if (strcmp(argv[i], "--break") == 0) {
236			argv[i++] = NULL;
237			if (i < argc) {
238			ROMBreakpoint = strtol(argv[i], NULL, 0);
239			argv[i] = NULL;
240			}
241			} else if (strcmp(argv[i], "--config") == 0) {
242			argv[i++] = NULL;
243			if (i < argc) {
244			extern string UserPrefsPath; // from prefs_unix.cpp
245			UserPrefsPath = argv[i];
246			argv[i] = NULL;
247			}
248			} else if (strcmp(argv[i], "--rominfo") == 0) {
249			argv[i] = NULL;
250			PrintROMInfo = true;
251	gbeauche	1.3	} else if (strcmp(argv[i], "--cdboot") == 0) {
252			argv[i] = NULL;
253			cd_boot = true;
254	gbeauche	1.1	}
255			}
256
257			// Remove processed arguments
258			for (int i=1; i<argc; i++) {
259			int k;
260			for (k=i; k<argc; k++)
261			if (argv[k] != NULL)
262			break;
263			if (k > i) {
264			k -= i;
265			for (int j=i+k; j<argc; j++)
266			argv[j-k] = argv[j];
267			argc -= k;
268			}
269			}
270
271			// Read preferences
272			PrefsInit(argc, argv);
273
274	gbeauche	1.3	// Boot MacOS from CD-ROM?
275			if (cd_boot)
276			PrefsReplaceInt32("bootdriver", CDROMRefNum);
277
278	gbeauche	1.1	// Any command line arguments left?
279			for (int i=1; i<argc; i++) {
280			if (argv[i][0] == '-') {
281			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
282			usage(argv[0]);
283			}
284			}
285
286	gbeauche	1.2	// Check we are using a Windows NT kernel >= 4.0
287			OSVERSIONINFO osvi;
288			ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
289			osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
290	gbeauche	1.4	if (!GetVersionEx(&osvi)) {
291			ErrorAlert("Could not determine OS type");
292			QuitEmulator();
293			}
294			win_os = osvi.dwPlatformId;
295			win_os_major = osvi.dwMajorVersion;
296			if (win_os != VER_PLATFORM_WIN32_NT \|\| win_os_major < 4) {
297	gbeauche	1.2	ErrorAlert(STR_NO_WIN32_NT_4);
298			QuitEmulator();
299			}
300
301	gbeauche	1.6	// Check that drivers are installed
302			if (!check_drivers())
303			QuitEmulator();
304
305	gbeauche	1.4	// Load win32 libraries
306			KernelInit();
307
308	gbeauche	1.1	// Initialize SDL system
309			int sdl_flags = 0;
310			#ifdef USE_SDL_VIDEO
311			sdl_flags \|= SDL_INIT_VIDEO;
312			#endif
313			#ifdef USE_SDL_AUDIO
314			sdl_flags \|= SDL_INIT_AUDIO;
315			#endif
316			assert(sdl_flags != 0);
317			if (SDL_Init(sdl_flags) == -1) {
318			char str[256];
319			sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
320			ErrorAlert(str);
321			QuitEmulator();
322			}
323			atexit(SDL_Quit);
324
325			// Init system routines
326			SysInit();
327
328			// Show preferences editor
329			if (!PrefsFindBool("nogui"))
330			if (!PrefsEditor())
331			QuitEmulator();
332
333			// Install the handler for SIGSEGV
334			if (!sigsegv_install_handler(sigsegv_handler)) {
335			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
336			ErrorAlert(str);
337			QuitEmulator();
338			}
339
340			// Register dump state function when we got mad after a segfault
341			sigsegv_set_dump_state(sigsegv_dump_state);
342
343			// Read RAM size
344			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
345			if (RAMSize < 1024*1024) {
346			WarningAlert(GetString(STR_SMALL_RAM_WARN));
347			RAMSize = 1024*1024;
348			}
349
350			// Initialize VM system
351			vm_init();
352
353			// Create areas for Mac RAM and ROM
354			#ifdef USE_33BIT_ADDRESSING
355			// Speculatively enables 33-bit addressing
356			ThirtyThreeBitAddressing = true;
357			#endif
358			RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
359			ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
360			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
361			ErrorAlert(STR_NO_MEM_ERR);
362			QuitEmulator();
363			}
364
365			#if USE_SCRATCHMEM_SUBTERFUGE
366			// Allocate scratch memory
367			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
368			if (ScratchMem == VM_MAP_FAILED) {
369			ErrorAlert(STR_NO_MEM_ERR);
370			QuitEmulator();
371			}
372			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
373			#endif
374
375			#if DIRECT_ADDRESSING
376			// RAMBaseMac shall always be zero
377			MEMBaseDiff = (uintptr)RAMBaseHost;
378			RAMBaseMac = 0;
379			ROMBaseMac = Host2MacAddr(ROMBaseHost);
380			#endif
381			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
382			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
383
384			// Get rom file path from preferences
385			const char *rom_path = PrefsFindString("rom");
386
387			// Load Mac ROM
388			HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
389			GENERIC_READ,
390			0, NULL,
391			OPEN_EXISTING,
392			FILE_ATTRIBUTE_NORMAL,
393			NULL);
394			if (rom_fh == INVALID_HANDLE_VALUE) {
395			ErrorAlert(STR_NO_ROM_FILE_ERR);
396			QuitEmulator();
397			}
398			printf(GetString(STR_READING_ROM_FILE));
399			ROMSize = GetFileSize(rom_fh, NULL);
400			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
401			ErrorAlert(STR_ROM_SIZE_ERR);
402			CloseHandle(rom_fh);
403			QuitEmulator();
404			}
405			DWORD bytes_read;
406			if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 \|\| bytes_read != ROMSize) {
407			ErrorAlert(STR_ROM_FILE_READ_ERR);
408			CloseHandle(rom_fh);
409			QuitEmulator();
410			}
411
412			// Initialize native timers
413			timer_init();
414
415			// Initialize everything
416			if (!InitAll())
417			QuitEmulator();
418			D(bug("Initialization complete\n"));
419
420			// SDL threads available, start 60Hz thread
421			tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
422			if (!tick_thread_active) {
423			sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
424			ErrorAlert(str);
425			QuitEmulator();
426			}
427			D(bug("60Hz thread started\n"));
428
429			// Start XPRAM watchdog thread
430			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
431			xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
432			D(bug("XPRAM thread started\n"));
433
434			// Start 68k and jump to ROM boot routine
435			D(bug("Starting emulation...\n"));
436			Start680x0();
437
438			QuitEmulator();
439			return 0;
440			}
441
442
443			/*
444			* Quit emulator
445			*/
446
447			void QuitEmulator(void)
448			{
449			D(bug("QuitEmulator\n"));
450
451			// Exit 680x0 emulation
452			Exit680x0();
453
454			// Stop 60Hz thread
455			if (tick_thread_active) {
456			tick_thread_cancel = true;
457			SDL_WaitThread(tick_thread, NULL);
458			}
459
460			// Stop XPRAM watchdog thread
461			if (xpram_thread_active) {
462			xpram_thread_cancel = true;
463			SDL_WaitThread(xpram_thread, NULL);
464			}
465
466			// Deinitialize everything
467			ExitAll();
468
469			// Free ROM/RAM areas
470			if (RAMBaseHost != VM_MAP_FAILED) {
471			vm_release(RAMBaseHost, RAMSize);
472			RAMBaseHost = NULL;
473			}
474			if (ROMBaseHost != VM_MAP_FAILED) {
475			vm_release(ROMBaseHost, 0x100000);
476			ROMBaseHost = NULL;
477			}
478
479			#if USE_SCRATCHMEM_SUBTERFUGE
480			// Delete scratch memory area
481			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
482			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
483			ScratchMem = NULL;
484			}
485			#endif
486
487			// Exit VM wrappers
488			vm_exit();
489
490			// Exit system routines
491			SysExit();
492
493			// Exit preferences
494			PrefsExit();
495
496	gbeauche	1.4	// Release win32 libraries
497			KernelExit();
498
499	gbeauche	1.1	exit(0);
500			}
501
502
503			/*
504			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
505			* or a dynamically recompiling emulator)
506			*/
507
508			void FlushCodeCache(void *start, uint32 size)
509			{
510			#if USE_JIT
511			if (UseJIT)
512			flush_icache_range((uintptr)start, size);
513			#endif
514			}
515
516
517			/*
518			* Mutexes
519			*/
520
521			struct B2_mutex {
522			B2_mutex() { m = SDL_CreateMutex(); }
523			~B2_mutex() { if (m) SDL_DestroyMutex(m); }
524			SDL_mutex *m;
525			};
526
527			B2_mutex *B2_create_mutex(void)
528			{
529			return new B2_mutex;
530			}
531
532			void B2_lock_mutex(B2_mutex *mutex)
533			{
534			if (mutex)
535			SDL_LockMutex(mutex->m);
536			}
537
538			void B2_unlock_mutex(B2_mutex *mutex)
539			{
540			if (mutex)
541			SDL_UnlockMutex(mutex->m);
542			}
543
544			void B2_delete_mutex(B2_mutex *mutex)
545			{
546			delete mutex;
547			}
548
549
550			/*
551			* Interrupt flags (must be handled atomically!)
552			*/
553
554			uint32 InterruptFlags = 0;
555
556			void SetInterruptFlag(uint32 flag)
557			{
558			LOCK_INTFLAGS;
559			InterruptFlags \|= flag;
560			UNLOCK_INTFLAGS;
561			}
562
563			void ClearInterruptFlag(uint32 flag)
564			{
565			LOCK_INTFLAGS;
566			InterruptFlags &= ~flag;
567			UNLOCK_INTFLAGS;
568			}
569
570
571			/*
572			* XPRAM watchdog thread (saves XPRAM every minute)
573			*/
574
575			static void xpram_watchdog(void)
576			{
577			if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
578			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
579			SaveXPRAM();
580			}
581			}
582
583			static int xpram_func(void *arg)
584			{
585			while (!xpram_thread_cancel) {
586			for (int i=0; i<60 && !xpram_thread_cancel; i++)
587			Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
588			xpram_watchdog();
589			}
590			return 0;
591			}
592
593
594			/*
595			* 60Hz thread (really 60.15Hz)
596			*/
597
598			static void one_second(void)
599			{
600			// Pseudo Mac 1Hz interrupt, update local time
601			WriteMacInt32(0x20c, TimerDateTime());
602
603			SetInterruptFlag(INTFLAG_1HZ);
604			TriggerInterrupt();
605			}
606
607			static void one_tick(...)
608			{
609			static int tick_counter = 0;
610			if (++tick_counter > 60) {
611			tick_counter = 0;
612			one_second();
613			}
614
615			// Trigger 60Hz interrupt
616			if (ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted()) {
617			SetInterruptFlag(INTFLAG_60HZ);
618			TriggerInterrupt();
619			}
620			}
621
622			static int tick_func(void *arg)
623			{
624			uint64 start = GetTicks_usec();
625			int64 ticks = 0;
626			uint64 next = GetTicks_usec();
627			while (!tick_thread_cancel) {
628			one_tick();
629			next += 16625;
630			int64 delay = next - GetTicks_usec();
631			if (delay > 0)
632			Delay_usec(delay);
633			else if (delay < -16625)
634			next = GetTicks_usec();
635			ticks++;
636			}
637			uint64 end = GetTicks_usec();
638			D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
639			return 0;
640			}
641
642
643			/*
644	gbeauche	1.2	* Get the main window handle
645	gbeauche	1.1	*/
646
647	gbeauche	1.2	#ifdef USE_SDL_VIDEO
648			#include <SDL_syswm.h>
649			static HWND GetMainWindowHandle(void)
650	gbeauche	1.1	{
651	gbeauche	1.2	SDL_SysWMinfo wmInfo;
652			wmInfo.version.major = SDL_MAJOR_VERSION;
653			wmInfo.version.minor = SDL_MINOR_VERSION;
654			wmInfo.version.patch = SDL_PATCHLEVEL;
655			return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
656	gbeauche	1.1	}
657	gbeauche	1.2	#endif
658	gbeauche	1.1
659
660	gbeauche	1.2	/*
661			* Display alert
662			*/
663
664			static void display_alert(int title_id, const char *text, int flags)
665	gbeauche	1.1	{
666	gbeauche	1.2	HWND hMainWnd = GetMainWindowHandle();
667			MessageBox(hMainWnd, text, GetString(title_id), MB_OK \| flags);
668	gbeauche	1.1	}
669
670
671			/*
672			* Display error alert
673			*/
674
675			void ErrorAlert(const char *text)
676			{
677	gbeauche	1.2	if (PrefsFindBool("nogui"))
678	gbeauche	1.1	return;
679	gbeauche	1.2
680	gbeauche	1.1	VideoQuitFullScreen();
681	gbeauche	1.2	display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
682	gbeauche	1.1	}
683
684
685			/*
686			* Display warning alert
687			*/
688
689			void WarningAlert(const char *text)
690			{
691	gbeauche	1.2	if (PrefsFindBool("nogui"))
692	gbeauche	1.1	return;
693	gbeauche	1.2
694			display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
695	gbeauche	1.1	}
696
697
698			/*
699			* Display choice alert
700			*/
701
702			bool ChoiceAlert(const char text, const char pos, const char *neg)
703			{
704			printf(GetString(STR_SHELL_WARNING_PREFIX), text);
705			return false; //!!
706			}