src/Windows/main_windows.cpp

/*
 *  main_windows.cpp - Startup code for Windows
 *
 *  Basilisk II (C) 1997-2008 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(uint8 *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;


// 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)
{
        return vm_acquire(size, VM_MAP_DEFAULT | VM_MAP_32BIT);
}


/*
 *  SIGSEGV handler
 */

static sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip)
{
        const uintptr fault_address = (uintptr)sigsegv_get_fault_address(sip);
#if ENABLE_VOSF
        // Handle screen fault
        extern bool Screen_fault_handler(sigsegv_info_t *sip);
        if (Screen_fault_handler(sip))
                return SIGSEGV_RETURN_SUCCESS;
#endif

#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
        // Ignore writes to ROM
        if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
                return SIGSEGV_RETURN_SKIP_INSTRUCTION;

        // Ignore all other faults, if requested
        if (PrefsFindBool("ignoresegv"))
                return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#endif

        return SIGSEGV_RETURN_FAILURE;
}

/*
 *  Dump state when everything went wrong after a SEGV
 */

static void sigsegv_dump_state(sigsegv_info_t *sip)
{
        const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
        const sigsegv_address_t fault_instruction = sigsegv_get_fault_instruction_address(sip);
        fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
        if (fault_instruction != SIGSEGV_INVALID_ADDRESS)
                fprintf(stderr, " [IP=%p]", fault_instruction);
        fprintf(stderr, "\n");
        uaecptr nextpc;
        extern void m68k_dumpstate(uaecptr *nextpc);
        m68k_dumpstate(&nextpc);
#if USE_JIT && JIT_DEBUG
        extern void compiler_dumpstate(void);
        compiler_dumpstate();
#endif
        VideoQuitFullScreen();
#ifdef ENABLE_MON
        char *arg[4] = {"mon", "-m", "-r", NULL};
        mon(3, arg);
        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
        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((uint8 *)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:	1.13
Committed:	2008-01-01T09:40:33Z (16 years, 10 months ago) by gbeauche
Branch:	MAIN
Changes since 1.12:	+1 -1 lines
Log Message:	Happy New Year!
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* main_windows.cpp - Startup code for Windows
3			*
4	gbeauche	1.13	* Basilisk II (C) 1997-2008 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	gbeauche	1.10	extern void flush_icache_range(uint8 *start, uint32 size); // from compemu_support.cpp
56	gbeauche	1.1	#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
77
78			// Global variables
79	gbeauche	1.9	HANDLE emul_thread = NULL; // Handle of MacOS emulation thread (main thread)
80
81	gbeauche	1.1	static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
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	gbeauche	1.11	return vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_32BIT);
137	gbeauche	1.1	}
138
139
140			/*
141			* SIGSEGV handler
142			*/
143
144	gbeauche	1.12	static sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip)
145	gbeauche	1.1	{
146	gbeauche	1.12	const uintptr fault_address = (uintptr)sigsegv_get_fault_address(sip);
147	gbeauche	1.1	#if ENABLE_VOSF
148			// Handle screen fault
149	gbeauche	1.12	extern bool Screen_fault_handler(sigsegv_info_t *sip);
150			if (Screen_fault_handler(sip))
151	gbeauche	1.1	return SIGSEGV_RETURN_SUCCESS;
152			#endif
153
154			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
155			// Ignore writes to ROM
156			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
157			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
158
159			// Ignore all other faults, if requested
160			if (PrefsFindBool("ignoresegv"))
161			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
162			#endif
163
164			return SIGSEGV_RETURN_FAILURE;
165			}
166
167			/*
168			* Dump state when everything went wrong after a SEGV
169			*/
170
171	gbeauche	1.12	static void sigsegv_dump_state(sigsegv_info_t *sip)
172	gbeauche	1.1	{
173	gbeauche	1.12	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
174			const sigsegv_address_t fault_instruction = sigsegv_get_fault_instruction_address(sip);
175	gbeauche	1.1	fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
176	gbeauche	1.12	if (fault_instruction != SIGSEGV_INVALID_ADDRESS)
177	gbeauche	1.1	fprintf(stderr, " [IP=%p]", fault_instruction);
178			fprintf(stderr, "\n");
179			uaecptr nextpc;
180			extern void m68k_dumpstate(uaecptr *nextpc);
181			m68k_dumpstate(&nextpc);
182			#if USE_JIT && JIT_DEBUG
183			extern void compiler_dumpstate(void);
184			compiler_dumpstate();
185			#endif
186			VideoQuitFullScreen();
187			#ifdef ENABLE_MON
188			char *arg[4] = {"mon", "-m", "-r", NULL};
189			mon(3, arg);
190			QuitEmulator();
191			#endif
192			}
193
194
195			/*
196			* Main program
197			*/
198
199			static void usage(const char *prg_name)
200			{
201			printf(
202			"Usage: %s [OPTION...]\n"
203			"\nUnix options:\n"
204			" --config FILE\n read/write configuration from/to FILE\n"
205			" --display STRING\n X display to use\n"
206			" --break ADDRESS\n set ROM breakpoint\n"
207			" --rominfo\n dump ROM information\n", prg_name
208			);
209			LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
210			PrefsPrintUsage();
211			exit(0);
212			}
213
214			int main(int argc, char **argv)
215			{
216			char str[256];
217	gbeauche	1.3	bool cd_boot = false;
218	gbeauche	1.1
219			// Initialize variables
220			RAMBaseHost = NULL;
221			ROMBaseHost = NULL;
222			srand(time(NULL));
223			tzset();
224
225			// Print some info
226			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
227			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
228
229			// Parse command line arguments
230			for (int i=1; i<argc; i++) {
231			if (strcmp(argv[i], "--help") == 0) {
232			usage(argv[0]);
233			} else if (strcmp(argv[i], "--break") == 0) {
234			argv[i++] = NULL;
235			if (i < argc) {
236			ROMBreakpoint = strtol(argv[i], NULL, 0);
237			argv[i] = NULL;
238			}
239			} else if (strcmp(argv[i], "--config") == 0) {
240			argv[i++] = NULL;
241			if (i < argc) {
242			extern string UserPrefsPath; // from prefs_unix.cpp
243			UserPrefsPath = argv[i];
244			argv[i] = NULL;
245			}
246			} else if (strcmp(argv[i], "--rominfo") == 0) {
247			argv[i] = NULL;
248			PrintROMInfo = true;
249	gbeauche	1.3	} else if (strcmp(argv[i], "--cdboot") == 0) {
250			argv[i] = NULL;
251			cd_boot = true;
252	gbeauche	1.1	}
253			}
254
255			// Remove processed arguments
256			for (int i=1; i<argc; i++) {
257			int k;
258			for (k=i; k<argc; k++)
259			if (argv[k] != NULL)
260			break;
261			if (k > i) {
262			k -= i;
263			for (int j=i+k; j<argc; j++)
264			argv[j-k] = argv[j];
265			argc -= k;
266			}
267			}
268
269			// Read preferences
270			PrefsInit(argc, argv);
271
272	gbeauche	1.3	// Boot MacOS from CD-ROM?
273			if (cd_boot)
274			PrefsReplaceInt32("bootdriver", CDROMRefNum);
275
276	gbeauche	1.1	// Any command line arguments left?
277			for (int i=1; i<argc; i++) {
278			if (argv[i][0] == '-') {
279			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
280			usage(argv[0]);
281			}
282			}
283
284	gbeauche	1.2	// Check we are using a Windows NT kernel >= 4.0
285			OSVERSIONINFO osvi;
286			ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
287			osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
288	gbeauche	1.4	if (!GetVersionEx(&osvi)) {
289			ErrorAlert("Could not determine OS type");
290			QuitEmulator();
291			}
292			win_os = osvi.dwPlatformId;
293			win_os_major = osvi.dwMajorVersion;
294			if (win_os != VER_PLATFORM_WIN32_NT \|\| win_os_major < 4) {
295	gbeauche	1.2	ErrorAlert(STR_NO_WIN32_NT_4);
296			QuitEmulator();
297			}
298
299	gbeauche	1.6	// Check that drivers are installed
300			if (!check_drivers())
301			QuitEmulator();
302
303	gbeauche	1.4	// Load win32 libraries
304			KernelInit();
305
306	gbeauche	1.7	// FIXME: default to DIB driver
307			if (getenv("SDL_VIDEODRIVER") == NULL)
308			putenv("SDL_VIDEODRIVER=windib");
309
310	gbeauche	1.1	// Initialize SDL system
311			int sdl_flags = 0;
312			#ifdef USE_SDL_VIDEO
313			sdl_flags \|= SDL_INIT_VIDEO;
314			#endif
315			#ifdef USE_SDL_AUDIO
316			sdl_flags \|= SDL_INIT_AUDIO;
317			#endif
318			assert(sdl_flags != 0);
319			if (SDL_Init(sdl_flags) == -1) {
320			char str[256];
321			sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
322			ErrorAlert(str);
323			QuitEmulator();
324			}
325			atexit(SDL_Quit);
326
327			// Init system routines
328			SysInit();
329
330			// Show preferences editor
331			if (!PrefsFindBool("nogui"))
332			if (!PrefsEditor())
333			QuitEmulator();
334
335			// Install the handler for SIGSEGV
336			if (!sigsegv_install_handler(sigsegv_handler)) {
337			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
338			ErrorAlert(str);
339			QuitEmulator();
340			}
341
342			// Register dump state function when we got mad after a segfault
343			sigsegv_set_dump_state(sigsegv_dump_state);
344
345			// Read RAM size
346			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
347			if (RAMSize < 1024*1024) {
348			WarningAlert(GetString(STR_SMALL_RAM_WARN));
349			RAMSize = 1024*1024;
350			}
351
352			// Initialize VM system
353			vm_init();
354
355			// Create areas for Mac RAM and ROM
356			RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
357			ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
358			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
359			ErrorAlert(STR_NO_MEM_ERR);
360			QuitEmulator();
361			}
362
363			#if USE_SCRATCHMEM_SUBTERFUGE
364			// Allocate scratch memory
365			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
366			if (ScratchMem == VM_MAP_FAILED) {
367			ErrorAlert(STR_NO_MEM_ERR);
368			QuitEmulator();
369			}
370			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
371			#endif
372
373			#if DIRECT_ADDRESSING
374			// RAMBaseMac shall always be zero
375			MEMBaseDiff = (uintptr)RAMBaseHost;
376			RAMBaseMac = 0;
377			ROMBaseMac = Host2MacAddr(ROMBaseHost);
378			#endif
379			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
380			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
381
382			// Get rom file path from preferences
383			const char *rom_path = PrefsFindString("rom");
384
385			// Load Mac ROM
386			HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
387			GENERIC_READ,
388			0, NULL,
389			OPEN_EXISTING,
390			FILE_ATTRIBUTE_NORMAL,
391			NULL);
392			if (rom_fh == INVALID_HANDLE_VALUE) {
393			ErrorAlert(STR_NO_ROM_FILE_ERR);
394			QuitEmulator();
395			}
396			printf(GetString(STR_READING_ROM_FILE));
397			ROMSize = GetFileSize(rom_fh, NULL);
398			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
399			ErrorAlert(STR_ROM_SIZE_ERR);
400			CloseHandle(rom_fh);
401			QuitEmulator();
402			}
403			DWORD bytes_read;
404			if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 \|\| bytes_read != ROMSize) {
405			ErrorAlert(STR_ROM_FILE_READ_ERR);
406			CloseHandle(rom_fh);
407			QuitEmulator();
408			}
409
410			// Initialize native timers
411			timer_init();
412
413			// Initialize everything
414			if (!InitAll())
415			QuitEmulator();
416			D(bug("Initialization complete\n"));
417
418	gbeauche	1.9	// Get handle of main thread
419			emul_thread = GetCurrentThread();
420
421	gbeauche	1.1	// SDL threads available, start 60Hz thread
422			tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
423			if (!tick_thread_active) {
424			sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
425			ErrorAlert(str);
426			QuitEmulator();
427			}
428			D(bug("60Hz thread started\n"));
429
430			// Start XPRAM watchdog thread
431			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
432			xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
433			D(bug("XPRAM thread started\n"));
434
435			// Start 68k and jump to ROM boot routine
436			D(bug("Starting emulation...\n"));
437			Start680x0();
438
439			QuitEmulator();
440			return 0;
441			}
442
443
444			/*
445			* Quit emulator
446			*/
447
448			void QuitEmulator(void)
449			{
450			D(bug("QuitEmulator\n"));
451
452			// Exit 680x0 emulation
453			Exit680x0();
454
455			// Stop 60Hz thread
456			if (tick_thread_active) {
457			tick_thread_cancel = true;
458			SDL_WaitThread(tick_thread, NULL);
459			}
460
461			// Stop XPRAM watchdog thread
462			if (xpram_thread_active) {
463			xpram_thread_cancel = true;
464			SDL_WaitThread(xpram_thread, NULL);
465			}
466
467			// Deinitialize everything
468			ExitAll();
469
470			// Free ROM/RAM areas
471			if (RAMBaseHost != VM_MAP_FAILED) {
472			vm_release(RAMBaseHost, RAMSize);
473			RAMBaseHost = NULL;
474			}
475			if (ROMBaseHost != VM_MAP_FAILED) {
476			vm_release(ROMBaseHost, 0x100000);
477			ROMBaseHost = NULL;
478			}
479
480			#if USE_SCRATCHMEM_SUBTERFUGE
481			// Delete scratch memory area
482			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
483			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
484			ScratchMem = NULL;
485			}
486			#endif
487
488			// Exit VM wrappers
489			vm_exit();
490
491			// Exit system routines
492			SysExit();
493
494			// Exit preferences
495			PrefsExit();
496
497	gbeauche	1.4	// Release win32 libraries
498			KernelExit();
499
500	gbeauche	1.1	exit(0);
501			}
502
503
504			/*
505			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
506			* or a dynamically recompiling emulator)
507			*/
508
509			void FlushCodeCache(void *start, uint32 size)
510			{
511			#if USE_JIT
512			if (UseJIT)
513	gbeauche	1.10	flush_icache_range((uint8 *)start, size);
514	gbeauche	1.1	#endif
515			}
516
517
518			/*
519			* Mutexes
520			*/
521
522			struct B2_mutex {
523			B2_mutex() { m = SDL_CreateMutex(); }
524			~B2_mutex() { if (m) SDL_DestroyMutex(m); }
525			SDL_mutex *m;
526			};
527
528			B2_mutex *B2_create_mutex(void)
529			{
530			return new B2_mutex;
531			}
532
533			void B2_lock_mutex(B2_mutex *mutex)
534			{
535			if (mutex)
536			SDL_LockMutex(mutex->m);
537			}
538
539			void B2_unlock_mutex(B2_mutex *mutex)
540			{
541			if (mutex)
542			SDL_UnlockMutex(mutex->m);
543			}
544
545			void B2_delete_mutex(B2_mutex *mutex)
546			{
547			delete mutex;
548			}
549
550
551			/*
552			* Interrupt flags (must be handled atomically!)
553			*/
554
555			uint32 InterruptFlags = 0;
556
557			void SetInterruptFlag(uint32 flag)
558			{
559			LOCK_INTFLAGS;
560			InterruptFlags \|= flag;
561			UNLOCK_INTFLAGS;
562			}
563
564			void ClearInterruptFlag(uint32 flag)
565			{
566			LOCK_INTFLAGS;
567			InterruptFlags &= ~flag;
568			UNLOCK_INTFLAGS;
569			}
570
571
572			/*
573			* XPRAM watchdog thread (saves XPRAM every minute)
574			*/
575
576			static void xpram_watchdog(void)
577			{
578			if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
579			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
580			SaveXPRAM();
581			}
582			}
583
584			static int xpram_func(void *arg)
585			{
586			while (!xpram_thread_cancel) {
587			for (int i=0; i<60 && !xpram_thread_cancel; i++)
588			Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
589			xpram_watchdog();
590			}
591			return 0;
592			}
593
594
595			/*
596			* 60Hz thread (really 60.15Hz)
597			*/
598
599			static void one_second(void)
600			{
601			// Pseudo Mac 1Hz interrupt, update local time
602			WriteMacInt32(0x20c, TimerDateTime());
603
604			SetInterruptFlag(INTFLAG_1HZ);
605			TriggerInterrupt();
606			}
607
608			static void one_tick(...)
609			{
610			static int tick_counter = 0;
611			if (++tick_counter > 60) {
612			tick_counter = 0;
613			one_second();
614			}
615
616			// Trigger 60Hz interrupt
617			if (ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted()) {
618			SetInterruptFlag(INTFLAG_60HZ);
619			TriggerInterrupt();
620			}
621			}
622
623			static int tick_func(void *arg)
624			{
625			uint64 start = GetTicks_usec();
626			int64 ticks = 0;
627			uint64 next = GetTicks_usec();
628			while (!tick_thread_cancel) {
629			one_tick();
630			next += 16625;
631			int64 delay = next - GetTicks_usec();
632			if (delay > 0)
633			Delay_usec(delay);
634			else if (delay < -16625)
635			next = GetTicks_usec();
636			ticks++;
637			}
638			uint64 end = GetTicks_usec();
639			D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
640			return 0;
641			}
642
643
644			/*
645	gbeauche	1.2	* Get the main window handle
646	gbeauche	1.1	*/
647
648	gbeauche	1.2	#ifdef USE_SDL_VIDEO
649			#include <SDL_syswm.h>
650	gbeauche	1.8	HWND GetMainWindowHandle(void)
651	gbeauche	1.1	{
652	gbeauche	1.2	SDL_SysWMinfo wmInfo;
653	gbeauche	1.8	SDL_VERSION(&wmInfo.version);
654	gbeauche	1.2	return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
655	gbeauche	1.1	}
656	gbeauche	1.2	#endif
657	gbeauche	1.1
658
659	gbeauche	1.2	/*
660			* Display alert
661			*/
662
663			static void display_alert(int title_id, const char *text, int flags)
664	gbeauche	1.1	{
665	gbeauche	1.2	HWND hMainWnd = GetMainWindowHandle();
666			MessageBox(hMainWnd, text, GetString(title_id), MB_OK \| flags);
667	gbeauche	1.1	}
668
669
670			/*
671			* Display error alert
672			*/
673
674			void ErrorAlert(const char *text)
675			{
676	gbeauche	1.2	if (PrefsFindBool("nogui"))
677	gbeauche	1.1	return;
678	gbeauche	1.2
679	gbeauche	1.1	VideoQuitFullScreen();
680	gbeauche	1.2	display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
681	gbeauche	1.1	}
682
683
684			/*
685			* Display warning alert
686			*/
687
688			void WarningAlert(const char *text)
689			{
690	gbeauche	1.2	if (PrefsFindBool("nogui"))
691	gbeauche	1.1	return;
692	gbeauche	1.2
693			display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
694	gbeauche	1.1	}
695
696
697			/*
698			* Display choice alert
699			*/
700
701			bool ChoiceAlert(const char text, const char pos, const char *neg)
702			{
703			printf(GetString(STR_SHELL_WARNING_PREFIX), text);
704			return false; //!!
705			}