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
HANDLE emul_thread = NULL;                                                      // Handle of MacOS emulation thread (main thread)

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();

        // FIXME: default to DIB driver
        if (getenv("SDL_VIDEODRIVER") == NULL)
            putenv("SDL_VIDEODRIVER=windib");

        // 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"));

        // Get handle of main thread
        emul_thread = GetCurrentThread();

        // 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>
HWND GetMainWindowHandle(void)
{
        SDL_SysWMinfo wmInfo;
        SDL_VERSION(&wmInfo.version);
        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:	1.9
Committed:	2006-05-01T06:12:50Z (18 years, 1 month ago) by gbeauche
Branch:	MAIN
Changes since 1.8:	+5 -1 lines
Log Message:	Implement better Windows suspend/resume routines so that we don't oversleep. i.e. really wake up the thread on next TriggerInterrupt().
#	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	gbeauche	1.9	HANDLE emul_thread = NULL; // Handle of MacOS emulation thread (main thread)
81
82	gbeauche	1.1	static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
83			static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
84			static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
85			static SDL_Thread *xpram_thread = NULL; // XPRAM watchdog
86
87			static bool tick_thread_active = false; // Flag: 60Hz thread installed
88			static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
89			static SDL_Thread *tick_thread; // 60Hz thread
90
91			static SDL_mutex *intflag_lock = NULL; // Mutex to protect InterruptFlags
92			#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
93			#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)
94
95	gbeauche	1.4	DWORD win_os; // Windows OS id
96			DWORD win_os_major; // Windows OS version major
97
98	gbeauche	1.1	#if USE_SCRATCHMEM_SUBTERFUGE
99			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
100			#endif
101
102			#if REAL_ADDRESSING
103			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
104			#endif
105
106
107			// Prototypes
108			static int xpram_func(void *arg);
109			static int tick_func(void *arg);
110			static void one_tick(...);
111
112
113			/*
114			* Ersatz functions
115			*/
116
117			extern "C" {
118
119			#ifndef HAVE_STRDUP
120			char strdup(const char s)
121			{
122			char n = (char )malloc(strlen(s) + 1);
123			strcpy(n, s);
124			return n;
125			}
126			#endif
127
128			}
129
130
131			/*
132			* Map memory that can be accessed from the Mac side
133			*/
134
135			void *vm_acquire_mac(size_t size)
136			{
137			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
138			if (m == NULL) {
139			ThirtyThreeBitAddressing = false;
140			m = vm_acquire(size);
141			}
142			return m;
143			}
144
145
146			/*
147			* SIGSEGV handler
148			*/
149
150			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, 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			* Dump state when everything went wrong after a SEGV
174			*/
175
176			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
177			{
178			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
179			if (fault_instruction != SIGSEGV_INVALID_PC)
180			fprintf(stderr, " [IP=%p]", fault_instruction);
181			fprintf(stderr, "\n");
182			uaecptr nextpc;
183			extern void m68k_dumpstate(uaecptr *nextpc);
184			m68k_dumpstate(&nextpc);
185			#if USE_JIT && JIT_DEBUG
186			extern void compiler_dumpstate(void);
187			compiler_dumpstate();
188			#endif
189			VideoQuitFullScreen();
190			#ifdef ENABLE_MON
191			char *arg[4] = {"mon", "-m", "-r", NULL};
192			mon(3, arg);
193			QuitEmulator();
194			#endif
195			}
196
197
198			/*
199			* Main program
200			*/
201
202			static void usage(const char *prg_name)
203			{
204			printf(
205			"Usage: %s [OPTION...]\n"
206			"\nUnix options:\n"
207			" --config FILE\n read/write configuration from/to FILE\n"
208			" --display STRING\n X display to use\n"
209			" --break ADDRESS\n set ROM breakpoint\n"
210			" --rominfo\n dump ROM information\n", prg_name
211			);
212			LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
213			PrefsPrintUsage();
214			exit(0);
215			}
216
217			int main(int argc, char **argv)
218			{
219			char str[256];
220	gbeauche	1.3	bool cd_boot = false;
221	gbeauche	1.1
222			// Initialize variables
223			RAMBaseHost = NULL;
224			ROMBaseHost = NULL;
225			srand(time(NULL));
226			tzset();
227
228			// Print some info
229			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
230			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
231
232			// Parse command line arguments
233			for (int i=1; i<argc; i++) {
234			if (strcmp(argv[i], "--help") == 0) {
235			usage(argv[0]);
236			} else if (strcmp(argv[i], "--break") == 0) {
237			argv[i++] = NULL;
238			if (i < argc) {
239			ROMBreakpoint = strtol(argv[i], NULL, 0);
240			argv[i] = NULL;
241			}
242			} else if (strcmp(argv[i], "--config") == 0) {
243			argv[i++] = NULL;
244			if (i < argc) {
245			extern string UserPrefsPath; // from prefs_unix.cpp
246			UserPrefsPath = argv[i];
247			argv[i] = NULL;
248			}
249			} else if (strcmp(argv[i], "--rominfo") == 0) {
250			argv[i] = NULL;
251			PrintROMInfo = true;
252	gbeauche	1.3	} else if (strcmp(argv[i], "--cdboot") == 0) {
253			argv[i] = NULL;
254			cd_boot = true;
255	gbeauche	1.1	}
256			}
257
258			// Remove processed arguments
259			for (int i=1; i<argc; i++) {
260			int k;
261			for (k=i; k<argc; k++)
262			if (argv[k] != NULL)
263			break;
264			if (k > i) {
265			k -= i;
266			for (int j=i+k; j<argc; j++)
267			argv[j-k] = argv[j];
268			argc -= k;
269			}
270			}
271
272			// Read preferences
273			PrefsInit(argc, argv);
274
275	gbeauche	1.3	// Boot MacOS from CD-ROM?
276			if (cd_boot)
277			PrefsReplaceInt32("bootdriver", CDROMRefNum);
278
279	gbeauche	1.1	// Any command line arguments left?
280			for (int i=1; i<argc; i++) {
281			if (argv[i][0] == '-') {
282			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
283			usage(argv[0]);
284			}
285			}
286
287	gbeauche	1.2	// Check we are using a Windows NT kernel >= 4.0
288			OSVERSIONINFO osvi;
289			ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
290			osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
291	gbeauche	1.4	if (!GetVersionEx(&osvi)) {
292			ErrorAlert("Could not determine OS type");
293			QuitEmulator();
294			}
295			win_os = osvi.dwPlatformId;
296			win_os_major = osvi.dwMajorVersion;
297			if (win_os != VER_PLATFORM_WIN32_NT \|\| win_os_major < 4) {
298	gbeauche	1.2	ErrorAlert(STR_NO_WIN32_NT_4);
299			QuitEmulator();
300			}
301
302	gbeauche	1.6	// Check that drivers are installed
303			if (!check_drivers())
304			QuitEmulator();
305
306	gbeauche	1.4	// Load win32 libraries
307			KernelInit();
308
309	gbeauche	1.7	// FIXME: default to DIB driver
310			if (getenv("SDL_VIDEODRIVER") == NULL)
311			putenv("SDL_VIDEODRIVER=windib");
312
313	gbeauche	1.1	// Initialize SDL system
314			int sdl_flags = 0;
315			#ifdef USE_SDL_VIDEO
316			sdl_flags \|= SDL_INIT_VIDEO;
317			#endif
318			#ifdef USE_SDL_AUDIO
319			sdl_flags \|= SDL_INIT_AUDIO;
320			#endif
321			assert(sdl_flags != 0);
322			if (SDL_Init(sdl_flags) == -1) {
323			char str[256];
324			sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
325			ErrorAlert(str);
326			QuitEmulator();
327			}
328			atexit(SDL_Quit);
329
330			// Init system routines
331			SysInit();
332
333			// Show preferences editor
334			if (!PrefsFindBool("nogui"))
335			if (!PrefsEditor())
336			QuitEmulator();
337
338			// Install the handler for SIGSEGV
339			if (!sigsegv_install_handler(sigsegv_handler)) {
340			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
341			ErrorAlert(str);
342			QuitEmulator();
343			}
344
345			// Register dump state function when we got mad after a segfault
346			sigsegv_set_dump_state(sigsegv_dump_state);
347
348			// Read RAM size
349			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
350			if (RAMSize < 1024*1024) {
351			WarningAlert(GetString(STR_SMALL_RAM_WARN));
352			RAMSize = 1024*1024;
353			}
354
355			// Initialize VM system
356			vm_init();
357
358			// Create areas for Mac RAM and ROM
359			#ifdef USE_33BIT_ADDRESSING
360			// Speculatively enables 33-bit addressing
361			ThirtyThreeBitAddressing = true;
362			#endif
363			RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
364			ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
365			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
366			ErrorAlert(STR_NO_MEM_ERR);
367			QuitEmulator();
368			}
369
370			#if USE_SCRATCHMEM_SUBTERFUGE
371			// Allocate scratch memory
372			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
373			if (ScratchMem == VM_MAP_FAILED) {
374			ErrorAlert(STR_NO_MEM_ERR);
375			QuitEmulator();
376			}
377			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
378			#endif
379
380			#if DIRECT_ADDRESSING
381			// RAMBaseMac shall always be zero
382			MEMBaseDiff = (uintptr)RAMBaseHost;
383			RAMBaseMac = 0;
384			ROMBaseMac = Host2MacAddr(ROMBaseHost);
385			#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
392			// Load Mac ROM
393			HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
394			GENERIC_READ,
395			0, NULL,
396			OPEN_EXISTING,
397			FILE_ATTRIBUTE_NORMAL,
398			NULL);
399			if (rom_fh == INVALID_HANDLE_VALUE) {
400			ErrorAlert(STR_NO_ROM_FILE_ERR);
401			QuitEmulator();
402			}
403			printf(GetString(STR_READING_ROM_FILE));
404			ROMSize = GetFileSize(rom_fh, NULL);
405			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
406			ErrorAlert(STR_ROM_SIZE_ERR);
407			CloseHandle(rom_fh);
408			QuitEmulator();
409			}
410			DWORD bytes_read;
411			if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 \|\| bytes_read != ROMSize) {
412			ErrorAlert(STR_ROM_FILE_READ_ERR);
413			CloseHandle(rom_fh);
414			QuitEmulator();
415			}
416
417			// Initialize native timers
418			timer_init();
419
420			// Initialize everything
421			if (!InitAll())
422			QuitEmulator();
423			D(bug("Initialization complete\n"));
424
425	gbeauche	1.9	// Get handle of main thread
426			emul_thread = GetCurrentThread();
427
428	gbeauche	1.1	// SDL threads available, start 60Hz thread
429			tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
430			if (!tick_thread_active) {
431			sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
432			ErrorAlert(str);
433			QuitEmulator();
434			}
435			D(bug("60Hz thread started\n"));
436
437			// Start XPRAM watchdog thread
438			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
439			xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
440			D(bug("XPRAM thread started\n"));
441
442			// Start 68k and jump to ROM boot routine
443			D(bug("Starting emulation...\n"));
444			Start680x0();
445
446			QuitEmulator();
447			return 0;
448			}
449
450
451			/*
452			* Quit emulator
453			*/
454
455			void QuitEmulator(void)
456			{
457			D(bug("QuitEmulator\n"));
458
459			// Exit 680x0 emulation
460			Exit680x0();
461
462			// Stop 60Hz thread
463			if (tick_thread_active) {
464			tick_thread_cancel = true;
465			SDL_WaitThread(tick_thread, NULL);
466			}
467
468			// Stop XPRAM watchdog thread
469			if (xpram_thread_active) {
470			xpram_thread_cancel = true;
471			SDL_WaitThread(xpram_thread, NULL);
472			}
473
474			// Deinitialize everything
475			ExitAll();
476
477			// Free ROM/RAM areas
478			if (RAMBaseHost != VM_MAP_FAILED) {
479			vm_release(RAMBaseHost, RAMSize);
480			RAMBaseHost = NULL;
481			}
482			if (ROMBaseHost != VM_MAP_FAILED) {
483			vm_release(ROMBaseHost, 0x100000);
484			ROMBaseHost = NULL;
485			}
486
487			#if USE_SCRATCHMEM_SUBTERFUGE
488			// Delete scratch memory area
489			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
490			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
491			ScratchMem = NULL;
492			}
493			#endif
494
495			// Exit VM wrappers
496			vm_exit();
497
498			// Exit system routines
499			SysExit();
500
501			// Exit preferences
502			PrefsExit();
503
504	gbeauche	1.4	// Release win32 libraries
505			KernelExit();
506
507	gbeauche	1.1	exit(0);
508			}
509
510
511			/*
512			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
513			* or a dynamically recompiling emulator)
514			*/
515
516			void FlushCodeCache(void *start, uint32 size)
517			{
518			#if USE_JIT
519			if (UseJIT)
520			flush_icache_range((uintptr)start, size);
521			#endif
522			}
523
524
525			/*
526			* Mutexes
527			*/
528
529			struct B2_mutex {
530			B2_mutex() { m = SDL_CreateMutex(); }
531			~B2_mutex() { if (m) SDL_DestroyMutex(m); }
532			SDL_mutex *m;
533			};
534
535			B2_mutex *B2_create_mutex(void)
536			{
537			return new B2_mutex;
538			}
539
540			void B2_lock_mutex(B2_mutex *mutex)
541			{
542			if (mutex)
543			SDL_LockMutex(mutex->m);
544			}
545
546			void B2_unlock_mutex(B2_mutex *mutex)
547			{
548			if (mutex)
549			SDL_UnlockMutex(mutex->m);
550			}
551
552			void B2_delete_mutex(B2_mutex *mutex)
553			{
554			delete mutex;
555			}
556
557
558			/*
559			* Interrupt flags (must be handled atomically!)
560			*/
561
562			uint32 InterruptFlags = 0;
563
564			void SetInterruptFlag(uint32 flag)
565			{
566			LOCK_INTFLAGS;
567			InterruptFlags \|= flag;
568			UNLOCK_INTFLAGS;
569			}
570
571			void ClearInterruptFlag(uint32 flag)
572			{
573			LOCK_INTFLAGS;
574			InterruptFlags &= ~flag;
575			UNLOCK_INTFLAGS;
576			}
577
578
579			/*
580			* XPRAM watchdog thread (saves XPRAM every minute)
581			*/
582
583			static void xpram_watchdog(void)
584			{
585			if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
586			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
587			SaveXPRAM();
588			}
589			}
590
591			static int xpram_func(void *arg)
592			{
593			while (!xpram_thread_cancel) {
594			for (int i=0; i<60 && !xpram_thread_cancel; i++)
595			Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
596			xpram_watchdog();
597			}
598			return 0;
599			}
600
601
602			/*
603			* 60Hz thread (really 60.15Hz)
604			*/
605
606			static void one_second(void)
607			{
608			// Pseudo Mac 1Hz interrupt, update local time
609			WriteMacInt32(0x20c, TimerDateTime());
610
611			SetInterruptFlag(INTFLAG_1HZ);
612			TriggerInterrupt();
613			}
614
615			static void one_tick(...)
616			{
617			static int tick_counter = 0;
618			if (++tick_counter > 60) {
619			tick_counter = 0;
620			one_second();
621			}
622
623			// Trigger 60Hz interrupt
624			if (ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted()) {
625			SetInterruptFlag(INTFLAG_60HZ);
626			TriggerInterrupt();
627			}
628			}
629
630			static int tick_func(void *arg)
631			{
632			uint64 start = GetTicks_usec();
633			int64 ticks = 0;
634			uint64 next = GetTicks_usec();
635			while (!tick_thread_cancel) {
636			one_tick();
637			next += 16625;
638			int64 delay = next - GetTicks_usec();
639			if (delay > 0)
640			Delay_usec(delay);
641			else if (delay < -16625)
642			next = GetTicks_usec();
643			ticks++;
644			}
645			uint64 end = GetTicks_usec();
646			D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
647			return 0;
648			}
649
650
651			/*
652	gbeauche	1.2	* Get the main window handle
653	gbeauche	1.1	*/
654
655	gbeauche	1.2	#ifdef USE_SDL_VIDEO
656			#include <SDL_syswm.h>
657	gbeauche	1.8	HWND GetMainWindowHandle(void)
658	gbeauche	1.1	{
659	gbeauche	1.2	SDL_SysWMinfo wmInfo;
660	gbeauche	1.8	SDL_VERSION(&wmInfo.version);
661	gbeauche	1.2	return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
662	gbeauche	1.1	}
663	gbeauche	1.2	#endif
664	gbeauche	1.1
665
666	gbeauche	1.2	/*
667			* Display alert
668			*/
669
670			static void display_alert(int title_id, const char *text, int flags)
671	gbeauche	1.1	{
672	gbeauche	1.2	HWND hMainWnd = GetMainWindowHandle();
673			MessageBox(hMainWnd, text, GetString(title_id), MB_OK \| flags);
674	gbeauche	1.1	}
675
676
677			/*
678			* Display error alert
679			*/
680
681			void ErrorAlert(const char *text)
682			{
683	gbeauche	1.2	if (PrefsFindBool("nogui"))
684	gbeauche	1.1	return;
685	gbeauche	1.2
686	gbeauche	1.1	VideoQuitFullScreen();
687	gbeauche	1.2	display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
688	gbeauche	1.1	}
689
690
691			/*
692			* Display warning alert
693			*/
694
695			void WarningAlert(const char *text)
696			{
697	gbeauche	1.2	if (PrefsFindBool("nogui"))
698	gbeauche	1.1	return;
699	gbeauche	1.2
700			display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
701	gbeauche	1.1	}
702
703
704			/*
705			* Display choice alert
706			*/
707
708			bool ChoiceAlert(const char text, const char pos, const char *neg)
709			{
710			printf(GetString(STR_SHELL_WARNING_PREFIX), text);
711			return false; //!!
712			}