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AmigActive 6
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Emulation
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BasiliskII
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src
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Unix
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main_unix.cpp
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C/C++ Source or Header
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2000-01-21
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/*
* main_unix.cpp - Startup code for Unix
*
* Basilisk II (C) 1997-1999 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 <pthread.h>
#include <signal.h>
#include "cpu_emulation.h"
#include "sys.h"
#include "rom_patches.h"
#include "xpram.h"
#include "timer.h"
#include "video.h"
#include "prefs.h"
#include "prefs_editor.h"
#include "macos_util.h"
#include "user_strings.h"
#include "version.h"
#include "main.h"
#define DEBUG 0
#include "debug.h"
#include <X11/Xlib.h>
#if ENABLE_GTK
#include <gtk/gtk.h>
#endif
#if ENABLE_XF86_DGA
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/xf86dga.h>
#endif
#if ENABLE_MON
#include "mon.h"
#endif
#ifdef USE_MAPPED_MEMORY
#include <sys/mman.h>
extern char *address_space, *good_address_map;
#endif
// Constants
const char ROM_FILE_NAME[] = "ROM";
// CPU and FPU type, addressing mode
int CPUType;
bool CPUIs68060;
int FPUType;
bool TwentyFourBitAddressing;
// Global variables
static char *x_display_name = NULL; // X11 display name
Display *x_display = NULL; // X11 display handle
static bool xpram_thread_active = false; // Flag: XPRAM watchdog installed
static volatile bool xpram_thread_cancel = false; // Flag: Cancel XPRAM thread
static pthread_t xpram_thread; // XPRAM watchdog
static bool tick_thread_active = false; // Flag: 60Hz thread installed
static volatile bool tick_thread_cancel = false; // Flag: Cancel 60Hz thread
static pthread_t tick_thread; // 60Hz thread
static pthread_attr_t tick_thread_attr; // 60Hz thread attributes
static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect InterruptFlags
#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
#define SIG_TIMER SIGRTMIN
static struct sigaction timer_sa; // sigaction used for timer
static timer_t timer; // 60Hz timer
#endif
#if ENABLE_MON
static struct sigaction sigint_sa; // sigaction for SIGINT handler
static void sigint_handler(...);
#endif
// Prototypes
static void *xpram_func(void *arg);
static void *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
}
/*
* Main program
*/
int main(int argc, char **argv)
{
// 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 arguments
for (int i=1; i<argc; i++) {
if (strcmp(argv[i], "-display") == 0 && ++i < argc)
x_display_name = argv[i];
else if (strcmp(argv[i], "-break") == 0 && ++i < argc)
ROMBreakpoint = strtol(argv[i], NULL, 0);
else if (strcmp(argv[i], "-rominfo") == 0)
PrintROMInfo = true;
}
// Open display
x_display = XOpenDisplay(x_display_name);
if (x_display == NULL) {
char str[256];
sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name));
ErrorAlert(str);
QuitEmulator();
}
#if ENABLE_XF86_DGA && !ENABLE_MON
// Fork out, so we can return from fullscreen mode when things get ugly
XF86DGAForkApp(DefaultScreen(x_display));
#endif
#if ENABLE_GTK
// Init GTK
gtk_set_locale();
gtk_init(&argc, &argv);
#endif
// Read preferences
PrefsInit();
// Init system routines
SysInit();
// Show preferences editor
if (!PrefsFindBool("nogui"))
if (!PrefsEditor())
QuitEmulator();
// 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;
}
// Create areas for Mac RAM and ROM
#ifdef USE_MAPPED_MEMORY
int fd = open("/dev/zero", O_RDWR);
good_address_map = (char *)mmap(NULL, 1<<24, PROT_READ, MAP_PRIVATE, fd, 0);
address_space = (char *)mmap(NULL, 1<<24, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if ((int)address_space < 0 || (int)good_address_map < 0) {
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
QuitEmulator();
}
RAMBaseHost = (uint8 *)mmap(address_space, RAMSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, 0);
ROMBaseHost = (uint8 *)mmap(address_space + 0x00400000, 0x80000, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, 0);
close(fd);
char *nam = tmpnam(NULL);
int good_address_fd = open(nam, O_CREAT | O_RDWR, 0600);
char buffer[4096];
memset(buffer, 1, sizeof(buffer));
write(good_address_fd, buffer, sizeof(buffer));
unlink(nam);
for (int i=0; i<RAMSize; i+=4096)
mmap(good_address_map + i, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
for (int i=0; i<0x80000; i+=4096)
mmap(good_address_map + i + 0x00400000, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
#else
RAMBaseHost = new uint8[RAMSize];
ROMBaseHost = new uint8[0x100000];
#endif
// Get rom file path from preferences
const char *rom_path = PrefsFindString("rom");
// Load Mac ROM
int rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
if (rom_fd < 0) {
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR));
QuitEmulator();
}
printf(GetString(STR_READING_ROM_FILE));
ROMSize = lseek(rom_fd, 0, SEEK_END);
if (ROMSize != 64*1024 && ROMSize != 128*1024 && ROMSize != 256*1024 && ROMSize != 512*1024 && ROMSize != 1024*1024) {
ErrorAlert(GetString(STR_ROM_SIZE_ERR));
close(rom_fd);
QuitEmulator();
}
lseek(rom_fd, 0, SEEK_SET);
if (read(rom_fd, ROMBaseHost, ROMSize) != (ssize_t)ROMSize) {
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR));
close(rom_fd);
QuitEmulator();
}
// Initialize everything
if (!InitAll())
QuitEmulator();
// Start XPRAM watchdog thread
xpram_thread_active = (pthread_create(&xpram_thread, NULL, xpram_func, NULL) == 0);
#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
// Start 60Hz timer
sigemptyset(&timer_sa.sa_mask);
timer_sa.sa_flags = SA_SIGINFO | SA_RESTART;
timer_sa.sa_sigaction = one_tick;
if (sigaction(SIG_TIMER, &timer_sa, NULL) < 0) {
printf("FATAL: cannot set up timer signal handler\n");
QuitEmulator();
}
struct sigevent timer_event;
timer_event.sigev_notify = SIGEV_SIGNAL;
timer_event.sigev_signo = SIG_TIMER;
if (timer_create(CLOCK_REALTIME, &timer_event, &timer) < 0) {
printf("FATAL: cannot create timer\n");
QuitEmulator();
}
struct itimerspec req;
req.it_value.tv_sec = 0;
req.it_value.tv_nsec = 16625000;
req.it_interval.tv_sec = 0;
req.it_interval.tv_nsec = 16625000;
if (timer_settime(timer, 0, &req, NULL) < 0) {
printf("FATAL: cannot start timer\n");
QuitEmulator();
}
#else
// Start 60Hz thread
pthread_attr_init(&tick_thread_attr);
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
if (geteuid() == 0) {
pthread_attr_setinheritsched(&tick_thread_attr, PTHREAD_EXPLICIT_SCHED);
pthread_attr_setschedpolicy(&tick_thread_attr, SCHED_FIFO);
struct sched_param fifo_param;
fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2;
pthread_attr_setschedparam(&tick_thread_attr, &fifo_param);
}
#endif
tick_thread_active = (pthread_create(&tick_thread, &tick_thread_attr, tick_func, NULL) == 0);
if (!tick_thread_active) {
printf("FATAL: cannot create tick thread\n");
QuitEmulator();
}
#endif
#if ENABLE_MON
// Setup SIGINT handler to enter mon
sigemptyset(&sigint_sa.sa_mask);
sigint_sa.sa_flags = 0;
sigint_sa.sa_handler = sigint_handler;
sigaction(SIGINT, &sigint_sa, NULL);
#endif
// Start 68k and jump to ROM boot routine
Start680x0();
QuitEmulator();
return 0;
}
/*
* Quit emulator
*/
void QuitEmulator(void)
{
// Exit 680x0 emulation
Exit680x0();
#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
// Stop 60Hz timer
timer_delete(timer);
#else
// Stop 60Hz thread
if (tick_thread_active) {
tick_thread_cancel = true;
#ifdef HAVE_PTHREAD_CANCEL
pthread_cancel(tick_thread);
#endif
pthread_join(tick_thread, NULL);
}
#endif
// Stop XPRAM watchdog thread
if (xpram_thread_active) {
xpram_thread_cancel = true;
#ifdef HAVE_PTHREAD_CANCEL
pthread_cancel(xpram_thread);
#endif
pthread_join(xpram_thread, NULL);
}
// Deinitialize everything
ExitAll();
// Delete ROM area
delete[] ROMBaseHost;
// Delete RAM area
delete[] RAMBaseHost;
// Exit system routines
SysExit();
// Exit preferences
PrefsExit();
// Close X11 server connection
if (x_display)
XCloseDisplay(x_display);
exit(0);
}
/*
* Code was patched, flush caches if neccessary (i.e. when using a real 680x0
* or a dynamically recompiling emulator)
*/
#if EMULATED_68K
void FlushCodeCache(void *start, uint32 size)
{
}
#endif
/*
* SIGINT handler, enters mon
*/
#if ENABLE_MON
extern void m68k_dumpstate(uaecptr *nextpc);
static void sigint_handler(...)
{
uaecptr nextpc;
m68k_dumpstate(&nextpc);
char *arg[2] = {"rmon", NULL};
mon(1, arg);
QuitEmulator();
}
#endif
/*
* Interrupt flags (must be handled atomically!)
*/
uint32 InterruptFlags = 0;
void SetInterruptFlag(uint32 flag)
{
pthread_mutex_lock(&intflag_lock);
InterruptFlags |= flag;
pthread_mutex_unlock(&intflag_lock);
}
void ClearInterruptFlag(uint32 flag)
{
pthread_mutex_lock(&intflag_lock);
InterruptFlags &= ~flag;
pthread_mutex_unlock(&intflag_lock);
}
/*
* 60Hz thread (really 60.15Hz)
*/
static void one_tick(...)
{
static int tick_counter = 0;
// Pseudo Mac 1Hz interrupt, update local time
if (++tick_counter > 60) {
tick_counter = 0;
WriteMacInt32(0x20c, TimerDateTime());
}
// Trigger 60Hz interrupt
if (ROMVersion != ROM_VERSION_CLASSIC || HasMacStarted()) {
SetInterruptFlag(INTFLAG_60HZ);
TriggerInterrupt();
}
}
static void *tick_func(void *arg)
{
while (!tick_thread_cancel) {
// Wait
#ifdef HAVE_NANOSLEEP
struct timespec req = {0, 16625000};
nanosleep(&req, NULL);
#else
usleep(16625);
#endif
// Action
one_tick();
}
return NULL;
}
/*
* XPRAM watchdog thread (saves XPRAM every minute)
*/
void *xpram_func(void *arg)
{
uint8 last_xpram[256];
memcpy(last_xpram, XPRAM, 256);
while (!xpram_thread_cancel) {
for (int i=0; i<60 && !xpram_thread_cancel; i++) {
#ifdef HAVE_NANOSLEEP
struct timespec req = {1, 0};
nanosleep(&req, NULL);
#else
usleep(1000000);
#endif
}
if (memcmp(last_xpram, XPRAM, 256)) {
memcpy(last_xpram, XPRAM, 256);
SaveXPRAM();
}
}
return NULL;
}
/*
* Display alert
*/
#if ENABLE_GTK
static void dl_destroyed(void)
{
gtk_main_quit();
}
static void dl_quit(GtkWidget *dialog)
{
gtk_widget_destroy(dialog);
}
void display_alert(int title_id, int prefix_id, int button_id, const char *text)
{
char str[256];
sprintf(str, GetString(prefix_id), text);
GtkWidget *dialog = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id));
gtk_container_border_width(GTK_CONTAINER(dialog), 5);
gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150);
gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL);
GtkWidget *label = gtk_label_new(str);
gtk_widget_show(label);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0);
GtkWidget *button = gtk_button_new_with_label(GetString(button_id));
gtk_widget_show(button);
gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog));
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0);
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
gtk_widget_grab_default(button);
gtk_widget_show(dialog);
gtk_main();
}
#endif
/*
* Display error alert
*/
void ErrorAlert(const char *text)
{
#if ENABLE_GTK
if (PrefsFindBool("nogui") || x_display == NULL) {
printf(GetString(STR_SHELL_ERROR_PREFIX), text);
return;
}
VideoQuitFullScreen();
display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text);
#else
printf(GetString(STR_SHELL_ERROR_PREFIX), text);
#endif
}
/*
* Display warning alert
*/
void WarningAlert(const char *text)
{
#if ENABLE_GTK
if (PrefsFindBool("nogui") || x_display == NULL) {
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
return;
}
display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text);
#else
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
#endif
}
/*
* Display choice alert
*/
bool ChoiceAlert(const char *text, const char *pos, const char *neg)
{
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
return false; //!!
}