src/Windows/main_windows.cpp

/*
 *  main_windows.cpp - Startup code for Windows
 *
 *  Basilisk II (C) 1997-2004 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"

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

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

#include <string>
using std::string;

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

        // 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:	1.4
Committed:	2004-12-05T16:54:14Z (19 years, 11 months ago) by gbeauche
Branch:	MAIN
Changes since 1.3:	+17 -1 lines
Log Message:	Import some extra functions from Win32 libraries. Expose OS versions.
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* main_windows.cpp - Startup code for Windows
3			*
4			* Basilisk II (C) 1997-2004 Christian Bauer
5			*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sysdeps.h"
22
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <signal.h>
26			#include <errno.h>
27
28			#include <SDL.h>
29			#include <SDL_mutex.h>
30			#include <SDL_thread.h>
31
32			#include <string>
33			using std::string;
34
35			#include "cpu_emulation.h"
36			#include "sys.h"
37			#include "rom_patches.h"
38			#include "xpram.h"
39			#include "timer.h"
40			#include "video.h"
41	gbeauche	1.3	#include "cdrom.h"
42	gbeauche	1.1	#include "emul_op.h"
43			#include "prefs.h"
44			#include "prefs_editor.h"
45			#include "macos_util.h"
46			#include "user_strings.h"
47			#include "version.h"
48			#include "main.h"
49			#include "vm_alloc.h"
50			#include "sigsegv.h"
51	gbeauche	1.4	#include "kernel_windows.h"
52	gbeauche	1.1
53			#if USE_JIT
54			extern void flush_icache_range(uint32 start, uint32 size); // from compemu_support.cpp
55			#endif
56
57			#ifdef ENABLE_MON
58			# include "mon.h"
59			#endif
60
61			#define DEBUG 0
62			#include "debug.h"
63
64
65			// Constants
66			const char ROM_FILE_NAME[] = "ROM";
67			const int SCRATCH_MEM_SIZE = 0x10000; // Size of scratch memory area
68
69
70			// CPU and FPU type, addressing mode
71			int CPUType;
72			bool CPUIs68060;
73			int FPUType;
74			bool TwentyFourBitAddressing;
75			bool ThirtyThreeBitAddressing = false;
76
77
78			// Global variables
79			static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
80
81			static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
82			static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
83			static SDL_Thread *xpram_thread = NULL; // XPRAM watchdog
84
85			static bool tick_thread_active = false; // Flag: 60Hz thread installed
86			static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
87			static SDL_Thread *tick_thread; // 60Hz thread
88
89			static SDL_mutex *intflag_lock = NULL; // Mutex to protect InterruptFlags
90			#define LOCK_INTFLAGS SDL_LockMutex(intflag_lock)
91			#define UNLOCK_INTFLAGS SDL_UnlockMutex(intflag_lock)
92
93	gbeauche	1.4	DWORD win_os; // Windows OS id
94			DWORD win_os_major; // Windows OS version major
95
96	gbeauche	1.1	#if USE_SCRATCHMEM_SUBTERFUGE
97			uint8 *ScratchMem = NULL; // Scratch memory for Mac ROM writes
98			#endif
99
100			#if REAL_ADDRESSING
101			static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
102			#endif
103
104
105			// Prototypes
106			static int xpram_func(void *arg);
107			static int tick_func(void *arg);
108			static void one_tick(...);
109
110
111			/*
112			* Ersatz functions
113			*/
114
115			extern "C" {
116
117			#ifndef HAVE_STRDUP
118			char strdup(const char s)
119			{
120			char n = (char )malloc(strlen(s) + 1);
121			strcpy(n, s);
122			return n;
123			}
124			#endif
125
126			}
127
128
129			/*
130			* Map memory that can be accessed from the Mac side
131			*/
132
133			void *vm_acquire_mac(size_t size)
134			{
135			void *m = vm_acquire(size, VM_MAP_DEFAULT \| VM_MAP_33BIT);
136			if (m == NULL) {
137			ThirtyThreeBitAddressing = false;
138			m = vm_acquire(size);
139			}
140			return m;
141			}
142
143
144			/*
145			* SIGSEGV handler
146			*/
147
148			static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
149			{
150			#if ENABLE_VOSF
151			// Handle screen fault
152			extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
153			if (Screen_fault_handler(fault_address, fault_instruction))
154			return SIGSEGV_RETURN_SUCCESS;
155			#endif
156
157			#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
158			// Ignore writes to ROM
159			if (((uintptr)fault_address - (uintptr)ROMBaseHost) < ROMSize)
160			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
161
162			// Ignore all other faults, if requested
163			if (PrefsFindBool("ignoresegv"))
164			return SIGSEGV_RETURN_SKIP_INSTRUCTION;
165			#endif
166
167			return SIGSEGV_RETURN_FAILURE;
168			}
169
170			/*
171			* Dump state when everything went wrong after a SEGV
172			*/
173
174			static void sigsegv_dump_state(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
175			{
176			fprintf(stderr, "Caught SIGSEGV at address %p", fault_address);
177			if (fault_instruction != SIGSEGV_INVALID_PC)
178			fprintf(stderr, " [IP=%p]", fault_instruction);
179			fprintf(stderr, "\n");
180			uaecptr nextpc;
181			extern void m68k_dumpstate(uaecptr *nextpc);
182			m68k_dumpstate(&nextpc);
183			#if USE_JIT && JIT_DEBUG
184			extern void compiler_dumpstate(void);
185			compiler_dumpstate();
186			#endif
187			VideoQuitFullScreen();
188			#ifdef ENABLE_MON
189			char *arg[4] = {"mon", "-m", "-r", NULL};
190			mon(3, arg);
191			QuitEmulator();
192			#endif
193			}
194
195
196			/*
197			* Main program
198			*/
199
200			static void usage(const char *prg_name)
201			{
202			printf(
203			"Usage: %s [OPTION...]\n"
204			"\nUnix options:\n"
205			" --config FILE\n read/write configuration from/to FILE\n"
206			" --display STRING\n X display to use\n"
207			" --break ADDRESS\n set ROM breakpoint\n"
208			" --rominfo\n dump ROM information\n", prg_name
209			);
210			LoadPrefs(); // read the prefs file so PrefsPrintUsage() will print the correct default values
211			PrefsPrintUsage();
212			exit(0);
213			}
214
215			int main(int argc, char **argv)
216			{
217			char str[256];
218	gbeauche	1.3	bool cd_boot = false;
219	gbeauche	1.1
220			// Initialize variables
221			RAMBaseHost = NULL;
222			ROMBaseHost = NULL;
223			srand(time(NULL));
224			tzset();
225
226			// Print some info
227			printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
228			printf(" %s\n", GetString(STR_ABOUT_TEXT2));
229
230			// Parse command line arguments
231			for (int i=1; i<argc; i++) {
232			if (strcmp(argv[i], "--help") == 0) {
233			usage(argv[0]);
234			} else if (strcmp(argv[i], "--break") == 0) {
235			argv[i++] = NULL;
236			if (i < argc) {
237			ROMBreakpoint = strtol(argv[i], NULL, 0);
238			argv[i] = NULL;
239			}
240			} else if (strcmp(argv[i], "--config") == 0) {
241			argv[i++] = NULL;
242			if (i < argc) {
243			extern string UserPrefsPath; // from prefs_unix.cpp
244			UserPrefsPath = argv[i];
245			argv[i] = NULL;
246			}
247			} else if (strcmp(argv[i], "--rominfo") == 0) {
248			argv[i] = NULL;
249			PrintROMInfo = true;
250	gbeauche	1.3	} else if (strcmp(argv[i], "--cdboot") == 0) {
251			argv[i] = NULL;
252			cd_boot = true;
253	gbeauche	1.1	}
254			}
255
256			// Remove processed arguments
257			for (int i=1; i<argc; i++) {
258			int k;
259			for (k=i; k<argc; k++)
260			if (argv[k] != NULL)
261			break;
262			if (k > i) {
263			k -= i;
264			for (int j=i+k; j<argc; j++)
265			argv[j-k] = argv[j];
266			argc -= k;
267			}
268			}
269
270			// Read preferences
271			PrefsInit(argc, argv);
272
273	gbeauche	1.3	// Boot MacOS from CD-ROM?
274			if (cd_boot)
275			PrefsReplaceInt32("bootdriver", CDROMRefNum);
276
277	gbeauche	1.1	// Any command line arguments left?
278			for (int i=1; i<argc; i++) {
279			if (argv[i][0] == '-') {
280			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
281			usage(argv[0]);
282			}
283			}
284
285	gbeauche	1.2	// Check we are using a Windows NT kernel >= 4.0
286			OSVERSIONINFO osvi;
287			ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
288			osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
289	gbeauche	1.4	if (!GetVersionEx(&osvi)) {
290			ErrorAlert("Could not determine OS type");
291			QuitEmulator();
292			}
293			win_os = osvi.dwPlatformId;
294			win_os_major = osvi.dwMajorVersion;
295			if (win_os != VER_PLATFORM_WIN32_NT \|\| win_os_major < 4) {
296	gbeauche	1.2	ErrorAlert(STR_NO_WIN32_NT_4);
297			QuitEmulator();
298			}
299
300	gbeauche	1.4	// Load win32 libraries
301			KernelInit();
302
303	gbeauche	1.1	// Initialize SDL system
304			int sdl_flags = 0;
305			#ifdef USE_SDL_VIDEO
306			sdl_flags \|= SDL_INIT_VIDEO;
307			#endif
308			#ifdef USE_SDL_AUDIO
309			sdl_flags \|= SDL_INIT_AUDIO;
310			#endif
311			assert(sdl_flags != 0);
312			if (SDL_Init(sdl_flags) == -1) {
313			char str[256];
314			sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
315			ErrorAlert(str);
316			QuitEmulator();
317			}
318			atexit(SDL_Quit);
319
320			// Init system routines
321			SysInit();
322
323			// Show preferences editor
324			if (!PrefsFindBool("nogui"))
325			if (!PrefsEditor())
326			QuitEmulator();
327
328			// Install the handler for SIGSEGV
329			if (!sigsegv_install_handler(sigsegv_handler)) {
330			sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
331			ErrorAlert(str);
332			QuitEmulator();
333			}
334
335			// Register dump state function when we got mad after a segfault
336			sigsegv_set_dump_state(sigsegv_dump_state);
337
338			// Read RAM size
339			RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary
340			if (RAMSize < 1024*1024) {
341			WarningAlert(GetString(STR_SMALL_RAM_WARN));
342			RAMSize = 1024*1024;
343			}
344
345			// Initialize VM system
346			vm_init();
347
348			// Create areas for Mac RAM and ROM
349			#ifdef USE_33BIT_ADDRESSING
350			// Speculatively enables 33-bit addressing
351			ThirtyThreeBitAddressing = true;
352			#endif
353			RAMBaseHost = (uint8 *)vm_acquire_mac(RAMSize);
354			ROMBaseHost = (uint8 *)vm_acquire_mac(0x100000);
355			if (RAMBaseHost == VM_MAP_FAILED \|\| ROMBaseHost == VM_MAP_FAILED) {
356			ErrorAlert(STR_NO_MEM_ERR);
357			QuitEmulator();
358			}
359
360			#if USE_SCRATCHMEM_SUBTERFUGE
361			// Allocate scratch memory
362			ScratchMem = (uint8 *)vm_acquire(SCRATCH_MEM_SIZE);
363			if (ScratchMem == VM_MAP_FAILED) {
364			ErrorAlert(STR_NO_MEM_ERR);
365			QuitEmulator();
366			}
367			ScratchMem += SCRATCH_MEM_SIZE/2; // ScratchMem points to middle of block
368			#endif
369
370			#if DIRECT_ADDRESSING
371			// RAMBaseMac shall always be zero
372			MEMBaseDiff = (uintptr)RAMBaseHost;
373			RAMBaseMac = 0;
374			ROMBaseMac = Host2MacAddr(ROMBaseHost);
375			#endif
376			D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
377			D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
378
379			// Get rom file path from preferences
380			const char *rom_path = PrefsFindString("rom");
381
382			// Load Mac ROM
383			HANDLE rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
384			GENERIC_READ,
385			0, NULL,
386			OPEN_EXISTING,
387			FILE_ATTRIBUTE_NORMAL,
388			NULL);
389			if (rom_fh == INVALID_HANDLE_VALUE) {
390			ErrorAlert(STR_NO_ROM_FILE_ERR);
391			QuitEmulator();
392			}
393			printf(GetString(STR_READING_ROM_FILE));
394			ROMSize = GetFileSize(rom_fh, NULL);
395			if (ROMSize != 641024 && ROMSize != 1281024 && ROMSize != 2561024 && ROMSize != 5121024 && ROMSize != 1024*1024) {
396			ErrorAlert(STR_ROM_SIZE_ERR);
397			CloseHandle(rom_fh);
398			QuitEmulator();
399			}
400			DWORD bytes_read;
401			if (ReadFile(rom_fh, ROMBaseHost, ROMSize, &bytes_read, NULL) == 0 \|\| bytes_read != ROMSize) {
402			ErrorAlert(STR_ROM_FILE_READ_ERR);
403			CloseHandle(rom_fh);
404			QuitEmulator();
405			}
406
407			// Initialize native timers
408			timer_init();
409
410			// Initialize everything
411			if (!InitAll())
412			QuitEmulator();
413			D(bug("Initialization complete\n"));
414
415			// SDL threads available, start 60Hz thread
416			tick_thread_active = ((tick_thread = SDL_CreateThread(tick_func, NULL)) != NULL);
417			if (!tick_thread_active) {
418			sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
419			ErrorAlert(str);
420			QuitEmulator();
421			}
422			D(bug("60Hz thread started\n"));
423
424			// Start XPRAM watchdog thread
425			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
426			xpram_thread_active = ((xpram_thread = SDL_CreateThread(xpram_func, NULL)) != NULL);
427			D(bug("XPRAM thread started\n"));
428
429			// Start 68k and jump to ROM boot routine
430			D(bug("Starting emulation...\n"));
431			Start680x0();
432
433			QuitEmulator();
434			return 0;
435			}
436
437
438			/*
439			* Quit emulator
440			*/
441
442			void QuitEmulator(void)
443			{
444			D(bug("QuitEmulator\n"));
445
446			// Exit 680x0 emulation
447			Exit680x0();
448
449			// Stop 60Hz thread
450			if (tick_thread_active) {
451			tick_thread_cancel = true;
452			SDL_WaitThread(tick_thread, NULL);
453			}
454
455			// Stop XPRAM watchdog thread
456			if (xpram_thread_active) {
457			xpram_thread_cancel = true;
458			SDL_WaitThread(xpram_thread, NULL);
459			}
460
461			// Deinitialize everything
462			ExitAll();
463
464			// Free ROM/RAM areas
465			if (RAMBaseHost != VM_MAP_FAILED) {
466			vm_release(RAMBaseHost, RAMSize);
467			RAMBaseHost = NULL;
468			}
469			if (ROMBaseHost != VM_MAP_FAILED) {
470			vm_release(ROMBaseHost, 0x100000);
471			ROMBaseHost = NULL;
472			}
473
474			#if USE_SCRATCHMEM_SUBTERFUGE
475			// Delete scratch memory area
476			if (ScratchMem != (uint8 *)VM_MAP_FAILED) {
477			vm_release((void *)(ScratchMem - SCRATCH_MEM_SIZE/2), SCRATCH_MEM_SIZE);
478			ScratchMem = NULL;
479			}
480			#endif
481
482			// Exit VM wrappers
483			vm_exit();
484
485			// Exit system routines
486			SysExit();
487
488			// Exit preferences
489			PrefsExit();
490
491	gbeauche	1.4	// Release win32 libraries
492			KernelExit();
493
494	gbeauche	1.1	exit(0);
495			}
496
497
498			/*
499			* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
500			* or a dynamically recompiling emulator)
501			*/
502
503			void FlushCodeCache(void *start, uint32 size)
504			{
505			#if USE_JIT
506			if (UseJIT)
507			flush_icache_range((uintptr)start, size);
508			#endif
509			}
510
511
512			/*
513			* Mutexes
514			*/
515
516			struct B2_mutex {
517			B2_mutex() { m = SDL_CreateMutex(); }
518			~B2_mutex() { if (m) SDL_DestroyMutex(m); }
519			SDL_mutex *m;
520			};
521
522			B2_mutex *B2_create_mutex(void)
523			{
524			return new B2_mutex;
525			}
526
527			void B2_lock_mutex(B2_mutex *mutex)
528			{
529			if (mutex)
530			SDL_LockMutex(mutex->m);
531			}
532
533			void B2_unlock_mutex(B2_mutex *mutex)
534			{
535			if (mutex)
536			SDL_UnlockMutex(mutex->m);
537			}
538
539			void B2_delete_mutex(B2_mutex *mutex)
540			{
541			delete mutex;
542			}
543
544
545			/*
546			* Interrupt flags (must be handled atomically!)
547			*/
548
549			uint32 InterruptFlags = 0;
550
551			void SetInterruptFlag(uint32 flag)
552			{
553			LOCK_INTFLAGS;
554			InterruptFlags \|= flag;
555			UNLOCK_INTFLAGS;
556			}
557
558			void ClearInterruptFlag(uint32 flag)
559			{
560			LOCK_INTFLAGS;
561			InterruptFlags &= ~flag;
562			UNLOCK_INTFLAGS;
563			}
564
565
566			/*
567			* XPRAM watchdog thread (saves XPRAM every minute)
568			*/
569
570			static void xpram_watchdog(void)
571			{
572			if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
573			memcpy(last_xpram, XPRAM, XPRAM_SIZE);
574			SaveXPRAM();
575			}
576			}
577
578			static int xpram_func(void *arg)
579			{
580			while (!xpram_thread_cancel) {
581			for (int i=0; i<60 && !xpram_thread_cancel; i++)
582			Delay_usec(999999); // Only wait 1 second so we quit promptly when xpram_thread_cancel becomes true
583			xpram_watchdog();
584			}
585			return 0;
586			}
587
588
589			/*
590			* 60Hz thread (really 60.15Hz)
591			*/
592
593			static void one_second(void)
594			{
595			// Pseudo Mac 1Hz interrupt, update local time
596			WriteMacInt32(0x20c, TimerDateTime());
597
598			SetInterruptFlag(INTFLAG_1HZ);
599			TriggerInterrupt();
600			}
601
602			static void one_tick(...)
603			{
604			static int tick_counter = 0;
605			if (++tick_counter > 60) {
606			tick_counter = 0;
607			one_second();
608			}
609
610			// Trigger 60Hz interrupt
611			if (ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted()) {
612			SetInterruptFlag(INTFLAG_60HZ);
613			TriggerInterrupt();
614			}
615			}
616
617			static int tick_func(void *arg)
618			{
619			uint64 start = GetTicks_usec();
620			int64 ticks = 0;
621			uint64 next = GetTicks_usec();
622			while (!tick_thread_cancel) {
623			one_tick();
624			next += 16625;
625			int64 delay = next - GetTicks_usec();
626			if (delay > 0)
627			Delay_usec(delay);
628			else if (delay < -16625)
629			next = GetTicks_usec();
630			ticks++;
631			}
632			uint64 end = GetTicks_usec();
633			D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
634			return 0;
635			}
636
637
638			/*
639	gbeauche	1.2	* Get the main window handle
640	gbeauche	1.1	*/
641
642	gbeauche	1.2	#ifdef USE_SDL_VIDEO
643			#include <SDL_syswm.h>
644			static HWND GetMainWindowHandle(void)
645	gbeauche	1.1	{
646	gbeauche	1.2	SDL_SysWMinfo wmInfo;
647			wmInfo.version.major = SDL_MAJOR_VERSION;
648			wmInfo.version.minor = SDL_MINOR_VERSION;
649			wmInfo.version.patch = SDL_PATCHLEVEL;
650			return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
651	gbeauche	1.1	}
652	gbeauche	1.2	#endif
653	gbeauche	1.1
654
655	gbeauche	1.2	/*
656			* Display alert
657			*/
658
659			static void display_alert(int title_id, const char *text, int flags)
660	gbeauche	1.1	{
661	gbeauche	1.2	HWND hMainWnd = GetMainWindowHandle();
662			MessageBox(hMainWnd, text, GetString(title_id), MB_OK \| flags);
663	gbeauche	1.1	}
664
665
666			/*
667			* Display error alert
668			*/
669
670			void ErrorAlert(const char *text)
671			{
672	gbeauche	1.2	if (PrefsFindBool("nogui"))
673	gbeauche	1.1	return;
674	gbeauche	1.2
675	gbeauche	1.1	VideoQuitFullScreen();
676	gbeauche	1.2	display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
677	gbeauche	1.1	}
678
679
680			/*
681			* Display warning alert
682			*/
683
684			void WarningAlert(const char *text)
685			{
686	gbeauche	1.2	if (PrefsFindBool("nogui"))
687	gbeauche	1.1	return;
688	gbeauche	1.2
689			display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
690	gbeauche	1.1	}
691
692
693			/*
694			* Display choice alert
695			*/
696
697			bool ChoiceAlert(const char text, const char pos, const char *neg)
698			{
699			printf(GetString(STR_SHELL_WARNING_PREFIX), text);
700			return false; //!!
701			}