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root/cebix/BasiliskII/src/Unix/main_unix.cpp

Comparing BasiliskII/src/Unix/main_unix.cpp (file contents):
Revision 1.6 by cebix, 1999-10-27T16:59:46Z vs.
Revision 1.22 by cebix, 2000-10-09T17:05:16Z

#	Line 1 | Line 1
1		/*
2		*  main_unix.cpp - Startup code for Unix
3		*
4	<	*  Basilisk II (C) 1997-1999 Christian Bauer
4	>	*  Basilisk II (C) 1997-2000 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
#	Line 22 | Line 22
22
23		#include <stdio.h>
24		#include <stdlib.h>
25	–	#include <pthread.h>
25		#include <signal.h>
26	+	#include <errno.h>
27	+	#include <X11/Xlib.h>
28	+
29	+	#ifdef HAVE_PTHREADS
30	+	# include <pthread.h>
31	+	#endif
32	+
33	+	#if defined(USE_MAPPED_MEMORY) || REAL_ADDRESSING || DIRECT_ADDRESSING
34	+	# include <sys/mman.h>
35	+	#endif
36	+
37	+	#if !EMULATED_68K && defined(__NetBSD__)
38	+	# include <m68k/sync_icache.h>
39	+	# include <m68k/frame.h>
40	+	# include <sys/param.h>
41	+	# include <sys/sysctl.h>
42	+	struct sigstate {
43	+	int ss_flags;
44	+	struct frame ss_frame;
45	+	struct fpframe ss_fpstate;
46	+	};
47	+	# define SS_FPSTATE  0x02
48	+	# define SS_USERREGS 0x04
49	+	#endif
50	+
51	+	#ifdef ENABLE_GTK
52	+	# include <gtk/gtk.h>
53	+	#endif
54	+
55	+	#ifdef ENABLE_XF86_DGA
56	+	# include <X11/Xutil.h>
57	+	# include <X11/extensions/xf86dga.h>
58	+	#endif
59
60		#include "cpu_emulation.h"
61		#include "sys.h"
#	Line 31 | Line 63
63		#include "xpram.h"
64		#include "timer.h"
65		#include "video.h"
66	+	#include "emul_op.h"
67		#include "prefs.h"
68		#include "prefs_editor.h"
69		#include "macos_util.h"
#	Line 38 | Line 71
71		#include "version.h"
72		#include "main.h"
73
74	+	#ifdef ENABLE_MON
75	+	# include "mon.h"
76	+	#endif
77	+
78		#define DEBUG 0
79		#include "debug.h"
80
81
82	<	#include <X11/Xlib.h>
83	<
84	<	#if ENABLE_GTK
85	<	#include <gtk/gtk.h>
49	<	#endif
82	>	// Constants
83	>	const char ROM_FILE_NAME[] = "ROM";
84	>	const int SIG_STACK_SIZE = SIGSTKSZ;    // Size of signal stack
85	>	const int SCRATCH_MEM_SIZE = 0x10000;   // Size of scratch memory area
86
51	–	#if ENABLE_XF86_DGA
52	–	#include <X11/Xlib.h>
53	–	#include <X11/Xutil.h>
54	–	#include <X11/extensions/xf86dga.h>
55	–	#endif
87
88	<	#if ENABLE_MON
89	<	#include "mon.h"
88	>	#if !EMULATED_68K
89	>	// RAM and ROM pointers
90	>	uint32 RAMBaseMac;              // RAM base (Mac address space)
91	>	uint8 *RAMBaseHost;             // RAM base (host address space)
92	>	uint32 RAMSize;                 // Size of RAM
93	>	uint32 ROMBaseMac;              // ROM base (Mac address space)
94	>	uint8 *ROMBaseHost;             // ROM base (host address space)
95	>	uint32 ROMSize;                 // Size of ROM
96		#endif
97
98
62	–	// Constants
63	–	const char ROM_FILE_NAME[] = "ROM";
64	–
65	–
99		// CPU and FPU type, addressing mode
100		int CPUType;
101		bool CPUIs68060;
#	Line 71 | Line 104 | bool TwentyFourBitAddressing;
104
105
106		// Global variables
107	<	static char *x_display_name = NULL;                                     // X11 display name
107	>	char *x_display_name = NULL;                                            // X11 display name
108		Display *x_display = NULL;                                                      // X11 display handle
109
110	+	static int zero_fd = -1;                                                        // FD of /dev/zero
111	+	static uint8 last_xpram[256];                                           // Buffer for monitoring XPRAM changes
112	+
113	+	#ifdef HAVE_PTHREADS
114	+	static pthread_t emul_thread;                                           // Handle of MacOS emulation thread (main thread)
115	+
116		static bool xpram_thread_active = false;                        // Flag: XPRAM watchdog installed
117		static volatile bool xpram_thread_cancel = false;       // Flag: Cancel XPRAM thread
118		static pthread_t xpram_thread;                                          // XPRAM watchdog
#	Line 83 | Line 122 | static volatile bool tick_thread_cancel
122		static pthread_t tick_thread;                                           // 60Hz thread
123		static pthread_attr_t tick_thread_attr;                         // 60Hz thread attributes
124
125	+	#if EMULATED_68K
126		static pthread_mutex_t intflag_lock = PTHREAD_MUTEX_INITIALIZER;        // Mutex to protect InterruptFlags
127	+	#endif
128	+	#endif
129	+
130	+	#if !EMULATED_68K
131	+	#define SIG_IRQ SIGUSR1
132	+	static struct sigaction sigirq_sa;      // Virtual 68k interrupt signal
133	+	static struct sigaction sigill_sa;      // Illegal instruction
134	+	static void *sig_stack = NULL;          // Stack for signal handlers
135	+	uint16 EmulatedSR;                                      // Emulated bits of SR (supervisor bit and interrupt mask)
136	+	#endif
137	+
138	+	#if USE_SCRATCHMEM_SUBTERFUGE
139	+	uint8 *ScratchMem = NULL;                       // Scratch memory for Mac ROM writes
140	+	#endif
141	+
142	+	static struct sigaction timer_sa;       // sigaction used for timer
143
144		#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
145		#define SIG_TIMER SIGRTMIN
146	<	static struct sigaction timer_sa;                                       // sigaction used for timer
91	<	static timer_t timer;                                                           // 60Hz timer
146	>	static timer_t timer;                           // 60Hz timer
147		#endif
148
149	<	#if ENABLE_MON
150	<	static struct sigaction sigint_sa;                                      // sigaction for SIGINT handler
149	>	#ifdef ENABLE_MON
150	>	static struct sigaction sigint_sa;      // sigaction for SIGINT handler
151		static void sigint_handler(...);
152		#endif
153
154	+	#if REAL_ADDRESSING
155	+	static bool lm_area_mapped = false;     // Flag: Low Memory area mmap()ped
156	+	static bool memory_mapped_from_zero = false; // Flag: Could allocate RAM area from 0
157	+	#endif
158	+
159	+	#if REAL_ADDRESSING || DIRECT_ADDRESSING
160	+	static uint32 mapped_ram_rom_size;              // Total size of mmap()ed RAM/ROM area
161	+	#endif
162	+
163	+	#ifdef USE_MAPPED_MEMORY
164	+	extern char *address_space, *good_address_map;
165	+	#endif
166	+
167
168		// Prototypes
169		static void *xpram_func(void *arg);
170		static void *tick_func(void *arg);
171		static void one_tick(...);
172	+	#if !EMULATED_68K
173	+	static void sigirq_handler(int sig, int code, struct sigcontext *scp);
174	+	static void sigill_handler(int sig, int code, struct sigcontext *scp);
175	+	extern "C" void EmulOpTrampoline(void);
176	+	#endif
177
178
179		/*
#	Line 127 | Line 200 | char *strdup(const char *s)
200
201		int main(int argc, char **argv)
202		{
203	+	char str[256];
204	+
205		// Initialize variables
206		RAMBaseHost = NULL;
207		ROMBaseHost = NULL;
#	Line 156 | Line 231 | int main(int argc, char **argv)
231		QuitEmulator();
232		}
233
234	<	#if ENABLE_XF86_DGA
234	>	#if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON)
235		// Fork out, so we can return from fullscreen mode when things get ugly
236		XF86DGAForkApp(DefaultScreen(x_display));
237		#endif
238
239	<	#if ENABLE_GTK
239	>	#ifdef ENABLE_GTK
240		// Init GTK
241		gtk_set_locale();
242		gtk_init(&argc, &argv);
#	Line 178 | Line 253 | int main(int argc, char **argv)
253		if (!PrefsEditor())
254		QuitEmulator();
255
256	<	// Create area for Mac RAM
256	>	// Open /dev/zero
257	>	zero_fd = open("/dev/zero", O_RDWR);
258	>	if (zero_fd < 0) {
259	>	sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno));
260	>	ErrorAlert(str);
261	>	QuitEmulator();
262	>	}
263	>
264	>	// Read RAM size
265		RAMSize = PrefsFindInt32("ramsize") & 0xfff00000;       // Round down to 1MB boundary
266		if (RAMSize < 1024*1024) {
267		WarningAlert(GetString(STR_SMALL_RAM_WARN));
268		RAMSize = 1024*1024;
269		}
187	–	RAMBaseHost = new uint8[RAMSize];
270
271	<	// Create area for Mac ROM
272	<	ROMBaseHost = new uint8[0x100000];
271	>	#if REAL_ADDRESSING || DIRECT_ADDRESSING
272	>	const uint32 page_size = getpagesize();
273	>	const uint32 page_mask = page_size - 1;
274	>	const uint32 aligned_ram_size = (RAMSize + page_mask) & ~page_mask;
275	>	mapped_ram_rom_size = aligned_ram_size + 0x100000;
276	>	#endif
277	>
278	>	#if REAL_ADDRESSING
279	>	// Try to allocate the complete address space from zero
280	>	// gb-- the Solaris manpage about mmap(2) states that using MAP_FIXED
281	>	// implies undefined behaviour for further use of sbrk(), malloc(), etc.
282	>	// cebix-- on NetBSD/m68k, this causes a segfault
283	>	#if defined(OS_solaris) || defined(OS_netbsd)
284	>	// Anyway, it doesn't work...
285	>	if (0) {
286	>	#else
287	>	if (mmap((caddr_t)0x0000, mapped_ram_rom_size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) != MAP_FAILED) {
288	>	#endif
289	>	D(bug("Could allocate RAM and ROM from 0x0000\n"));
290	>	memory_mapped_from_zero = true;
291	>	}
292	>	// Create Low Memory area (0x0000..0x2000)
293	>	else if (mmap((char *)0x0000, 0x2000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) != MAP_FAILED) {
294	>	D(bug("Could allocate the Low Memory globals\n"));
295	>	lm_area_mapped = true;
296	>	}
297	>	// Exit on error
298	>	else {
299	>	sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
300	>	ErrorAlert(str);
301	>	QuitEmulator();
302	>	}
303	>	#endif
304	>
305	>	#if USE_SCRATCHMEM_SUBTERFUGE
306	>	// Allocate scratch memory
307	>	ScratchMem = (uint8 *)malloc(SCRATCH_MEM_SIZE);
308	>	if (ScratchMem == NULL) {
309	>	ErrorAlert(GetString(STR_NO_MEM_ERR));
310	>	QuitEmulator();
311	>	}
312	>	ScratchMem += SCRATCH_MEM_SIZE/2;       // ScratchMem points to middle of block
313	>	#endif
314	>
315	>	// Create areas for Mac RAM and ROM
316	>	#if defined(USE_MAPPED_MEMORY)
317	>	good_address_map = (char *)mmap(NULL, 1<<24, PROT_READ, MAP_PRIVATE, zero_fd, 0);
318	>	address_space = (char *)mmap(NULL, 1<<24, PROT_READ | PROT_WRITE, MAP_PRIVATE, zero_fd, 0);
319	>	if ((int)address_space < 0 || (int)good_address_map < 0) {
320	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
321	>	QuitEmulator();
322	>	}
323	>	RAMBaseHost = (uint8 *)mmap(address_space, RAMSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, zero_fd, 0);
324	>	ROMBaseHost = (uint8 *)mmap(address_space + 0x00400000, 0x80000, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, zero_fd, 0);
325	>	char *nam = tmpnam(NULL);
326	>	int good_address_fd = open(nam, O_CREAT | O_RDWR, 0600);
327	>	char buffer[4096];
328	>	memset(buffer, 1, sizeof(buffer));
329	>	write(good_address_fd, buffer, sizeof(buffer));
330	>	unlink(nam);
331	>	for (int i=0; i<RAMSize; i+=4096)
332	>	mmap(good_address_map + i, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
333	>	for (int i=0; i<0x80000; i+=4096)
334	>	mmap(good_address_map + i + 0x00400000, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
335	>	#elif REAL_ADDRESSING || DIRECT_ADDRESSING
336	>	// gb-- Overkill, needs to be cleaned up. Probably explode it for either
337	>	// real or direct addressing mode.
338	>	#if REAL_ADDRESSING
339	>	if (memory_mapped_from_zero) {
340	>	RAMBaseHost = (uint8 *)0;
341	>	ROMBaseHost = RAMBaseHost + aligned_ram_size;
342	>	}
343	>	else
344	>	#endif
345	>	{
346	>	RAMBaseHost = (uint8 *)mmap(0, mapped_ram_rom_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zero_fd, 0);
347	>	if (RAMBaseHost == (uint8 *)MAP_FAILED) {
348	>	ErrorAlert(GetString(STR_NO_MEM_ERR));
349	>	QuitEmulator();
350	>	}
351	>	ROMBaseHost = RAMBaseHost + aligned_ram_size;
352	>	}
353	>	#else
354	>	RAMBaseHost = (uint8 *)malloc(RAMSize);
355	>	ROMBaseHost = (uint8 *)malloc(0x100000);
356	>	if (RAMBaseHost == NULL || ROMBaseHost == NULL) {
357	>	ErrorAlert(GetString(STR_NO_MEM_ERR));
358	>	QuitEmulator();
359	>	}
360	>	#endif
361
362	+	#if DIRECT_ADDRESSING
363	+	// Initialize MEMBaseDiff now so that Host2MacAddr in the Video module
364	+	// will return correct results
365	+	RAMBaseMac = 0;
366	+	ROMBaseMac = RAMBaseMac + aligned_ram_size;
367	+	InitMEMBaseDiff(RAMBaseHost, RAMBaseMac);
368	+	#endif
369	+	#if REAL_ADDRESSING // && !EMULATED_68K
370	+	RAMBaseMac = (uint32)RAMBaseHost;
371	+	ROMBaseMac = (uint32)ROMBaseHost;
372	+	#endif
373	+	D(bug("Mac RAM starts at %p (%08x)\n", RAMBaseHost, RAMBaseMac));
374	+	D(bug("Mac ROM starts at %p (%08x)\n", ROMBaseHost, ROMBaseMac));
375	+
376		// Get rom file path from preferences
377		const char *rom_path = PrefsFindString("rom");
378
#	Line 212 | Line 396 | int main(int argc, char **argv)
396		QuitEmulator();
397		}
398
399	+	#if !EMULATED_68K
400	+	// Get CPU model
401	+	int mib[2] = {CTL_HW, HW_MODEL};
402	+	char *model;
403	+	size_t model_len;
404	+	sysctl(mib, 2, NULL, &model_len, NULL, 0);
405	+	model = (char *)malloc(model_len);
406	+	sysctl(mib, 2, model, &model_len, NULL, 0);
407	+	D(bug("Model: %s\n", model));
408	+
409	+	// Set CPU and FPU type
410	+	CPUIs68060 = false;
411	+	if (strstr(model, "020"))
412	+	CPUType = 2;
413	+	else if (strstr(model, "030"))
414	+	CPUType = 3;
415	+	else if (strstr(model, "040"))
416	+	CPUType = 4;
417	+	else if (strstr(model, "060")) {
418	+	CPUType = 4;
419	+	CPUIs68060 = true;
420	+	} else {
421	+	printf("WARNING: Cannot detect CPU type, assuming 68020\n");
422	+	CPUType = 2;
423	+	}
424	+	FPUType = 0;    //!!
425	+	TwentyFourBitAddressing = false;
426	+	#endif
427	+
428		// Initialize everything
429		if (!InitAll())
430		QuitEmulator();
431	+	D(bug("Initialization complete\n"));
432
433	<	// Start XPRAM watchdog thread
434	<	xpram_thread_active = (pthread_create(&xpram_thread, NULL, xpram_func, NULL) == 0);
433	>	#ifdef HAVE_PTHREADS
434	>	// Get handle of main thread
435	>	emul_thread = pthread_self();
436	>	#endif
437	>
438	>	#if !EMULATED_68K
439	>	// (Virtual) supervisor mode, disable interrupts
440	>	EmulatedSR = 0x2700;
441	>
442	>	// Create and install stack for signal handlers
443	>	sig_stack = malloc(SIG_STACK_SIZE);
444	>	D(bug("Signal stack at %p\n", sig_stack));
445	>	if (sig_stack == NULL) {
446	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
447	>	QuitEmulator();
448	>	}
449	>	stack_t new_stack;
450	>	new_stack.ss_sp = sig_stack;
451	>	new_stack.ss_flags = 0;
452	>	new_stack.ss_size = SIG_STACK_SIZE;
453	>	if (sigaltstack(&new_stack, NULL) < 0) {
454	>	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
455	>	ErrorAlert(str);
456	>	QuitEmulator();
457	>	}
458	>
459	>	// Install SIGILL handler for emulating privileged instructions and
460	>	// executing A-Trap and EMUL_OP opcodes
461	>	sigemptyset(&sigill_sa.sa_mask);        // Block virtual 68k interrupts during SIGILL handling
462	>	sigaddset(&sigill_sa.sa_mask, SIG_IRQ);
463	>	sigaddset(&sigill_sa.sa_mask, SIGALRM);
464	>	sigill_sa.sa_handler = (void (*)(int))sigill_handler;
465	>	sigill_sa.sa_flags = SA_ONSTACK;
466	>	if (sigaction(SIGILL, &sigill_sa, NULL) < 0) {
467	>	sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGILL", strerror(errno));
468	>	ErrorAlert(str);
469	>	QuitEmulator();
470	>	}
471	>
472	>	// Install virtual 68k interrupt signal handler
473	>	sigemptyset(&sigirq_sa.sa_mask);
474	>	sigaddset(&sigirq_sa.sa_mask, SIGALRM);
475	>	sigirq_sa.sa_handler = (void (*)(int))sigirq_handler;
476	>	sigirq_sa.sa_flags = SA_ONSTACK | SA_RESTART;
477	>	if (sigaction(SIG_IRQ, &sigirq_sa, NULL) < 0) {
478	>	sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIG_IRQ", strerror(errno));
479	>	ErrorAlert(str);
480	>	QuitEmulator();
481	>	}
482	>	#endif
483	>
484	>	#ifdef ENABLE_MON
485	>	// Setup SIGINT handler to enter mon
486	>	sigemptyset(&sigint_sa.sa_mask);
487	>	sigint_sa.sa_handler = (void (*)(int))sigint_handler;
488	>	sigint_sa.sa_flags = 0;
489	>	sigaction(SIGINT, &sigint_sa, NULL);
490	>	#endif
491
492		#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
493	<	// Start 60Hz timer
493	>
494	>	// POSIX.4 timers and real-time signals available, start 60Hz timer
495		sigemptyset(&timer_sa.sa_mask);
496	+	timer_sa.sa_sigaction = (void (*)(int, siginfo_t *, void *))one_tick;
497		timer_sa.sa_flags = SA_SIGINFO | SA_RESTART;
226	–	timer_sa.sa_sigaction = one_tick;
498		if (sigaction(SIG_TIMER, &timer_sa, NULL) < 0) {
499	<	printf("FATAL: cannot set up timer signal handler\n");
499	>	sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIG_TIMER", strerror(errno));
500	>	ErrorAlert(str);
501		QuitEmulator();
502		}
503		struct sigevent timer_event;
504		timer_event.sigev_notify = SIGEV_SIGNAL;
505		timer_event.sigev_signo = SIG_TIMER;
506		if (timer_create(CLOCK_REALTIME, &timer_event, &timer) < 0) {
507	<	printf("FATAL: cannot create timer\n");
507	>	sprintf(str, GetString(STR_TIMER_CREATE_ERR), strerror(errno));
508	>	ErrorAlert(str);
509		QuitEmulator();
510		}
511		struct itimerspec req;
#	Line 240 | Line 513 | int main(int argc, char **argv)
513		req.it_value.tv_nsec = 16625000;
514		req.it_interval.tv_sec = 0;
515		req.it_interval.tv_nsec = 16625000;
516	<	if (timer_settime(timer, TIMER_RELTIME, &req, NULL) < 0) {
517	<	printf("FATAL: cannot start timer\n");
516	>	if (timer_settime(timer, 0, &req, NULL) < 0) {
517	>	sprintf(str, GetString(STR_TIMER_SETTIME_ERR), strerror(errno));
518	>	ErrorAlert(str);
519		QuitEmulator();
520		}
521	+	D(bug("60Hz timer started\n"));
522
523	<	#else
523	>	#elif defined(HAVE_PTHREADS)
524
525	<	// Start 60Hz thread
525	>	// POSIX threads available, start 60Hz thread
526		pthread_attr_init(&tick_thread_attr);
527		#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
528		if (geteuid() == 0) {
#	Line 260 | Line 535 | int main(int argc, char **argv)
535		#endif
536		tick_thread_active = (pthread_create(&tick_thread, &tick_thread_attr, tick_func, NULL) == 0);
537		if (!tick_thread_active) {
538	<	printf("FATAL: cannot create tick thread\n");
538	>	sprintf(str, GetString(STR_TICK_THREAD_ERR), strerror(errno));
539	>	ErrorAlert(str);
540		QuitEmulator();
541		}
542	+	D(bug("60Hz thread started\n"));
543	+
544	+	#else
545	+
546	+	// Start 60Hz timer
547	+	sigemptyset(&timer_sa.sa_mask);         // Block virtual 68k interrupts during SIGARLM handling
548	+	sigaddset(&timer_sa.sa_mask, SIG_IRQ);
549	+	timer_sa.sa_handler = one_tick;
550	+	timer_sa.sa_flags = SA_ONSTACK | SA_RESTART;
551	+	if (sigaction(SIGALRM, &timer_sa, NULL) < 0) {
552	+	sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGALRM", strerror(errno));
553	+	ErrorAlert(str);
554	+	QuitEmulator();
555	+	}
556	+	struct itimerval req;
557	+	req.it_interval.tv_sec = req.it_value.tv_sec = 0;
558	+	req.it_interval.tv_usec = req.it_value.tv_usec = 16625;
559	+	setitimer(ITIMER_REAL, &req, NULL);
560	+
561		#endif
562
563	<	#if ENABLE_MON
564	<	// Setup SIGINT handler to enter mon
565	<	sigemptyset(&sigint_sa.sa_mask);
566	<	sigint_sa.sa_flags = 0;
567	<	sigint_sa.sa_handler = sigint_handler;
273	<	sigaction(SIGINT, &sigint_sa, NULL);
563	>	#ifdef HAVE_PTHREADS
564	>	// Start XPRAM watchdog thread
565	>	memcpy(last_xpram, XPRAM, 256);
566	>	xpram_thread_active = (pthread_create(&xpram_thread, NULL, xpram_func, NULL) == 0);
567	>	D(bug("XPRAM thread started\n"));
568		#endif
569
570		// Start 68k and jump to ROM boot routine
571	+	D(bug("Starting emulation...\n"));
572		Start680x0();
573
574		QuitEmulator();
#	Line 287 | Line 582 | int main(int argc, char **argv)
582
583		void QuitEmulator(void)
584		{
585	+	D(bug("QuitEmulator\n"));
586	+
587	+	#if EMULATED_68K
588		// Exit 680x0 emulation
589		Exit680x0();
590	+	#endif
591
592		#if defined(HAVE_TIMER_CREATE) && defined(_POSIX_REALTIME_SIGNALS)
593		// Stop 60Hz timer
594		timer_delete(timer);
595	<	#else
595	>	#elif defined(HAVE_PTHREADS)
596		// Stop 60Hz thread
597		if (tick_thread_active) {
598		tick_thread_cancel = true;
#	Line 302 | Line 601 | void QuitEmulator(void)
601		#endif
602		pthread_join(tick_thread, NULL);
603		}
604	+	#else
605	+	struct itimerval req;
606	+	req.it_interval.tv_sec = req.it_value.tv_sec = 0;
607	+	req.it_interval.tv_usec = req.it_value.tv_usec = 0;
608	+	setitimer(ITIMER_REAL, &req, NULL);
609		#endif
610
611	+	#ifdef HAVE_PTHREADS
612		// Stop XPRAM watchdog thread
613		if (xpram_thread_active) {
614		xpram_thread_cancel = true;
#	Line 312 | Line 617 | void QuitEmulator(void)
617		#endif
618		pthread_join(xpram_thread, NULL);
619		}
620	+	#endif
621
622		// Deinitialize everything
623		ExitAll();
624
625	<	// Delete ROM area
626	<	delete[] ROMBaseHost;
625	>	// Free ROM/RAM areas
626	>	#if REAL_ADDRESSING || DIRECT_ADDRESSING
627	>	if (memory_mapped_from_zero)
628	>	munmap((caddr_t)0x0000, mapped_ram_rom_size);
629	>	else if (RAMBaseHost != (uint8 *)MAP_FAILED) {
630	>	munmap((caddr_t)RAMBaseHost, mapped_ram_rom_size);
631	>	RAMBaseHost = NULL;
632	>	}
633	>	#else
634	>	if (ROMBaseHost) {
635	>	free(ROMBaseHost);
636	>	ROMBaseHost = NULL;
637	>	}
638	>	if (RAMBaseHost) {
639	>	free(RAMBaseHost);
640	>	RAMBaseHost = NULL;
641	>	}
642	>	#endif
643	>
644	>	#if USE_SCRATCHMEM_SUBTERFUGE
645	>	// Delete scratch memory area
646	>	if (ScratchMem) {
647	>	free((void *)(ScratchMem - SCRATCH_MEM_SIZE/2));
648	>	ScratchMem = NULL;
649	>	}
650	>	#endif
651	>
652	>	#if REAL_ADDRESSING
653	>	// Delete Low Memory area
654	>	if (lm_area_mapped)
655	>	munmap((char *)0x0000, 0x2000);
656	>	#endif
657
658	<	// Delete RAM area
659	<	delete[] RAMBaseHost;
658	>	// Close /dev/zero
659	>	if (zero_fd > 0)
660	>	close(zero_fd);
661
662		// Exit system routines
663		SysExit();
#	Line 341 | Line 678 | void QuitEmulator(void)
678		*  or a dynamically recompiling emulator)
679		*/
680
344	–	#if EMULATED_68K
681		void FlushCodeCache(void *start, uint32 size)
682		{
683	<	}
683	>	#if !EMULATED_68K && defined(__NetBSD__)
684	>	m68k_sync_icache(start, size);
685		#endif
686	+	}
687
688
689		/*
690		*  SIGINT handler, enters mon
691		*/
692
693	<	#if ENABLE_MON
693	>	#ifdef ENABLE_MON
694		static void sigint_handler(...)
695		{
696	<	char *arg[2] = {"rmon", NULL};
697	<	mon(1, arg);
696	>	#if EMULATED_68K
697	>	uaecptr nextpc;
698	>	extern void m68k_dumpstate(uaecptr *nextpc);
699	>	m68k_dumpstate(&nextpc);
700	>	#else
701	>	char *arg[4] = {"mon", "-m", "-r", NULL};
702	>	mon(3, arg);
703		QuitEmulator();
704	+	#endif
705		}
706		#endif
707
#	Line 368 | Line 712 | static void sigint_handler(...)
712
713		uint32 InterruptFlags = 0;
714
715	+	#if EMULATED_68K
716		void SetInterruptFlag(uint32 flag)
717		{
718	+	#ifdef HAVE_PTHREADS
719		pthread_mutex_lock(&intflag_lock);
720		InterruptFlags |= flag;
721		pthread_mutex_unlock(&intflag_lock);
722	+	#else
723	+	InterruptFlags |= flag;         // Pray that this is an atomic operation...
724	+	#endif
725		}
726
727		void ClearInterruptFlag(uint32 flag)
728		{
729	+	#ifdef HAVE_PTHREADS
730		pthread_mutex_lock(&intflag_lock);
731		InterruptFlags &= ~flag;
732		pthread_mutex_unlock(&intflag_lock);
733	+	#else
734	+	InterruptFlags &= ~flag;
735	+	#endif
736		}
737	+	#endif
738	+
739	+	#if !EMULATED_68K
740	+	void TriggerInterrupt(void)
741	+	{
742	+	#if defined(HAVE_PTHREADS)
743	+	pthread_kill(emul_thread, SIG_IRQ);
744	+	#else
745	+	raise(SIG_IRQ);
746	+	#endif
747	+	}
748	+
749	+	void TriggerNMI(void)
750	+	{
751	+	// not yet supported
752	+	}
753	+	#endif
754	+
755	+
756	+	/*
757	+	*  XPRAM watchdog thread (saves XPRAM every minute)
758	+	*/
759	+
760	+	static void xpram_watchdog(void)
761	+	{
762	+	if (memcmp(last_xpram, XPRAM, 256)) {
763	+	memcpy(last_xpram, XPRAM, 256);
764	+	SaveXPRAM();
765	+	}
766	+	}
767	+
768	+	#ifdef HAVE_PTHREADS
769	+	static void *xpram_func(void *arg)
770	+	{
771	+	while (!xpram_thread_cancel) {
772	+	for (int i=0; i<60 && !xpram_thread_cancel; i++)
773	+	Delay_usec(1000000);
774	+	xpram_watchdog();
775	+	}
776	+	return NULL;
777	+	}
778	+	#endif
779
780
781		/*
782		*  60Hz thread (really 60.15Hz)
783		*/
784
785	+	static void one_second(void)
786	+	{
787	+	// Pseudo Mac 1Hz interrupt, update local time
788	+	WriteMacInt32(0x20c, TimerDateTime());
789	+
790	+	SetInterruptFlag(INTFLAG_1HZ);
791	+	TriggerInterrupt();
792	+
793	+	#ifndef HAVE_PTHREADS
794	+	static int second_counter = 0;
795	+	if (++second_counter > 60) {
796	+	second_counter = 0;
797	+	xpram_watchdog();
798	+	}
799	+	#endif
800	+	}
801	+
802		static void one_tick(...)
803		{
804		static int tick_counter = 0;
393	–
394	–	// Pseudo Mac 1Hz interrupt, update local time
805		if (++tick_counter > 60) {
806		tick_counter = 0;
807	<	WriteMacInt32(0x20c, TimerDateTime());
807	>	one_second();
808		}
809
810	+	#ifndef HAVE_PTHREADS
811	+	// No threads available, perform video refresh from here
812	+	VideoRefresh();
813	+	#endif
814	+
815		// Trigger 60Hz interrupt
816		if (ROMVersion != ROM_VERSION_CLASSIC || HasMacStarted()) {
817		SetInterruptFlag(INTFLAG_60HZ);
#	Line 404 | Line 819 | static void one_tick(...)
819		}
820		}
821
822	+	#ifdef HAVE_PTHREADS
823		static void *tick_func(void *arg)
824		{
825	+	uint64 next = GetTicks_usec();
826		while (!tick_thread_cancel) {
410	–
411	–	// Wait
412	–	#ifdef HAVE_NANOSLEEP
413	–	struct timespec req = {0, 16625000};
414	–	nanosleep(&req, NULL);
415	–	#else
416	–	usleep(16625);
417	–	#endif
418	–
419	–	// Action
827		one_tick();
828	+	next += 16625;
829	+	int64 delay = next - GetTicks_usec();
830	+	if (delay > 0)
831	+	Delay_usec(delay);
832	+	else if (delay < -16625)
833	+	next = GetTicks_usec();
834		}
835		return NULL;
836		}
837	+	#endif
838
839
840		/*
841	<	*  XPRAM watchdog thread (saves XPRAM every minute)
841	>	*  Get current value of microsecond timer
842		*/
843
844	<	void *xpram_func(void *arg)
844	>	uint64 GetTicks_usec(void)
845		{
846	<	uint8 last_xpram[256];
847	<	memcpy(last_xpram, XPRAM, 256);
846	>	#ifdef HAVE_CLOCK_GETTIME
847	>	struct timespec t;
848	>	clock_gettime(CLOCK_REALTIME, &t);
849	>	return (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000;
850	>	#else
851	>	struct timeval t;
852	>	gettimeofday(&t, NULL);
853	>	return (uint64)t.tv_sec * 1000000 + t.tv_usec;
854	>	#endif
855	>	}
856
857	<	while (!xpram_thread_cancel) {
858	<	for (int i=0; i<60 && !xpram_thread_cancel; i++) {
859	<	#ifdef HAVE_NANOSLEEP
860	<	struct timespec req = {1, 0};
861	<	nanosleep(&req, NULL);
857	>
858	>	/*
859	>	*  Delay by specified number of microseconds (<1 second)
860	>	*  (adapted from SDL_Delay() source)
861	>	*/
862	>
863	>	void Delay_usec(uint32 usec)
864	>	{
865	>	int was_error;
866	>	#ifndef __linux__       // Non-Linux implementations need to calculate time left
867	>	uint64 then, now, elapsed;
868	>	#endif
869	>	struct timeval tv;
870	>
871	>	// Set the timeout interval - Linux only needs to do this once
872	>	#ifdef __linux__
873	>	tv.tv_sec = 0;
874	>	tv.tv_usec = usec;
875		#else
876	<	usleep(1000000);
876	>	then = GetTicks_usec();
877		#endif
878	+	do {
879	+	errno = 0;
880	+	#ifndef __linux__
881	+	/* Calculate the time interval left (in case of interrupt) */
882	+	now = GetTicks_usec();
883	+	elapsed = now - then;
884	+	then = now;
885	+	if (elapsed >= usec)
886	+	break;
887	+	usec -= elapsed;
888	+	tv.tv_sec = 0;
889	+	tv.tv_usec = usec;
890	+	#endif
891	+	was_error = select(0, NULL, NULL, NULL, &tv);
892	+	} while (was_error && (errno == EINTR));
893	+	}
894	+
895	+
896	+	#if !EMULATED_68K
897	+	/*
898	+	*  Virtual 68k interrupt handler
899	+	*/
900	+
901	+	static void sigirq_handler(int sig, int code, struct sigcontext *scp)
902	+	{
903	+	// Interrupts disabled? Then do nothing
904	+	if (EmulatedSR & 0x0700)
905	+	return;
906	+
907	+	struct sigstate *state = (struct sigstate *)scp->sc_ap;
908	+	M68kRegisters *regs = (M68kRegisters *)&state->ss_frame;
909	+
910	+	// Set up interrupt frame on stack
911	+	uint32 a7 = regs->a[7];
912	+	a7 -= 2;
913	+	WriteMacInt16(a7, 0x64);
914	+	a7 -= 4;
915	+	WriteMacInt32(a7, scp->sc_pc);
916	+	a7 -= 2;
917	+	WriteMacInt16(a7, scp->sc_ps | EmulatedSR);
918	+	scp->sc_sp = regs->a[7] = a7;
919	+
920	+	// Set interrupt level
921	+	EmulatedSR |= 0x2100;
922	+
923	+	// Jump to MacOS interrupt handler on return
924	+	scp->sc_pc = ReadMacInt32(0x64);
925	+	}
926	+
927	+
928	+	/*
929	+	*  SIGILL handler, for emulation of privileged instructions and executing
930	+	*  A-Trap and EMUL_OP opcodes
931	+	*/
932	+
933	+	static void sigill_handler(int sig, int code, struct sigcontext *scp)
934	+	{
935	+	struct sigstate *state = (struct sigstate *)scp->sc_ap;
936	+	uint16 *pc = (uint16 *)scp->sc_pc;
937	+	uint16 opcode = *pc;
938	+	M68kRegisters *regs = (M68kRegisters *)&state->ss_frame;
939	+
940	+	#define INC_PC(n) scp->sc_pc += (n)
941	+
942	+	#define GET_SR (scp->sc_ps | EmulatedSR)
943	+
944	+	#define STORE_SR(v) \
945	+	scp->sc_ps = (v) & 0xff; \
946	+	EmulatedSR = (v) & 0x2700; \
947	+	if (((v) & 0x0700) == 0 && InterruptFlags) \
948	+	TriggerInterrupt();
949	+
950	+	//printf("opcode %04x at %p, sr %04x, emul_sr %04x\n", opcode, pc, scp->sc_ps, EmulatedSR);
951	+
952	+	if ((opcode & 0xf000) == 0xa000) {
953	+
954	+	// A-Line instruction, set up A-Line trap frame on stack
955	+	uint32 a7 = regs->a[7];
956	+	a7 -= 2;
957	+	WriteMacInt16(a7, 0x28);
958	+	a7 -= 4;
959	+	WriteMacInt32(a7, (uint32)pc);
960	+	a7 -= 2;
961	+	WriteMacInt16(a7, GET_SR);
962	+	scp->sc_sp = regs->a[7] = a7;
963	+
964	+	// Jump to MacOS A-Line handler on return
965	+	scp->sc_pc = ReadMacInt32(0x28);
966	+
967	+	} else if ((opcode & 0xff00) == 0x7100) {
968	+
969	+	// Extended opcode, push registers on user stack
970	+	uint32 a7 = regs->a[7];
971	+	a7 -= 4;
972	+	WriteMacInt32(a7, (uint32)pc);
973	+	a7 -= 2;
974	+	WriteMacInt16(a7, scp->sc_ps);
975	+	for (int i=7; i>=0; i--) {
976	+	a7 -= 4;
977	+	WriteMacInt32(a7, regs->a[i]);
978	+	}
979	+	for (int i=7; i>=0; i--) {
980	+	a7 -= 4;
981	+	WriteMacInt32(a7, regs->d[i]);
982	+	}
983	+	scp->sc_sp = regs->a[7] = a7;
984	+
985	+	// Jump to EmulOp trampoline code on return
986	+	scp->sc_pc = (uint32)EmulOpTrampoline;
987	+
988	+	} else switch (opcode) {        // Emulate privileged instructions
989	+
990	+	case 0x40e7:    // move sr,-(sp)
991	+	regs->a[7] -= 2;
992	+	WriteMacInt16(regs->a[7], GET_SR);
993	+	scp->sc_sp = regs->a[7];
994	+	INC_PC(2);
995	+	break;
996	+
997	+	case 0x46df: {  // move (sp)+,sr
998	+	uint16 sr = ReadMacInt16(regs->a[7]);
999	+	STORE_SR(sr);
1000	+	regs->a[7] += 2;
1001	+	scp->sc_sp = regs->a[7];
1002	+	INC_PC(2);
1003	+	break;
1004	+	}
1005	+
1006	+	case 0x007c: {  // ori #xxxx,sr
1007	+	uint16 sr = GET_SR | pc[1];
1008	+	scp->sc_ps = sr & 0xff;         // oring bits into the sr can't enable interrupts, so we don't need to call STORE_SR
1009	+	EmulatedSR = sr & 0x2700;
1010	+	INC_PC(4);
1011	+	break;
1012		}
1013	<	if (memcmp(last_xpram, XPRAM, 256)) {
1014	<	memcpy(last_xpram, XPRAM, 256);
1015	<	SaveXPRAM();
1013	>
1014	>	case 0x027c: {  // andi #xxxx,sr
1015	>	uint16 sr = GET_SR & pc[1];
1016	>	STORE_SR(sr);
1017	>	INC_PC(4);
1018	>	break;
1019		}
1020	+
1021	+	case 0x46fc:    // move #xxxx,sr
1022	+	STORE_SR(pc[1]);
1023	+	INC_PC(4);
1024	+	break;
1025	+
1026	+	case 0x46ef: {  // move (xxxx,sp),sr
1027	+	uint16 sr = ReadMacInt16(regs->a[7] + (int32)(int16)pc[1]);
1028	+	STORE_SR(sr);
1029	+	INC_PC(4);
1030	+	break;
1031	+	}
1032	+
1033	+	case 0x46d8:    // move (a0)+,sr
1034	+	case 0x46d9: {  // move (a1)+,sr
1035	+	uint16 sr = ReadMacInt16(regs->a[opcode & 7]);
1036	+	STORE_SR(sr);
1037	+	regs->a[opcode & 7] += 2;
1038	+	INC_PC(2);
1039	+	break;
1040	+	}
1041	+
1042	+	case 0x40f8:    // move sr,xxxx.w
1043	+	WriteMacInt16(pc[1], GET_SR);
1044	+	INC_PC(4);
1045	+	break;
1046	+
1047	+	case 0x40d0:    // move sr,(a0)
1048	+	case 0x40d1:    // move sr,(a1)
1049	+	case 0x40d2:    // move sr,(a2)
1050	+	case 0x40d3:    // move sr,(a3)
1051	+	case 0x40d4:    // move sr,(a4)
1052	+	case 0x40d5:    // move sr,(a5)
1053	+	case 0x40d6:    // move sr,(a6)
1054	+	case 0x40d7:    // move sr,(sp)
1055	+	WriteMacInt16(regs->a[opcode & 7], GET_SR);
1056	+	INC_PC(2);
1057	+	break;
1058	+
1059	+	case 0x40c0:    // move sr,d0
1060	+	case 0x40c1:    // move sr,d1
1061	+	case 0x40c2:    // move sr,d2
1062	+	case 0x40c3:    // move sr,d3
1063	+	case 0x40c4:    // move sr,d4
1064	+	case 0x40c5:    // move sr,d5
1065	+	case 0x40c6:    // move sr,d6
1066	+	case 0x40c7:    // move sr,d7
1067	+	regs->d[opcode & 7] = GET_SR;
1068	+	INC_PC(2);
1069	+	break;
1070	+
1071	+	case 0x46c0:    // move d0,sr
1072	+	case 0x46c1:    // move d1,sr
1073	+	case 0x46c2:    // move d2,sr
1074	+	case 0x46c3:    // move d3,sr
1075	+	case 0x46c4:    // move d4,sr
1076	+	case 0x46c5:    // move d5,sr
1077	+	case 0x46c6:    // move d6,sr
1078	+	case 0x46c7: {  // move d7,sr
1079	+	uint16 sr = regs->d[opcode & 7];
1080	+	STORE_SR(sr);
1081	+	INC_PC(2);
1082	+	break;
1083	+	}
1084	+
1085	+	case 0xf327:    // fsave -(sp)
1086	+	goto ill;       //!!
1087	+
1088	+	case 0xf35f:    // frestore (sp)+
1089	+	goto ill;       //!!
1090	+
1091	+	case 0x4e73: {  // rte (only handles format 0)
1092	+	uint32 a7 = regs->a[7];
1093	+	uint16 sr = ReadMacInt16(a7);
1094	+	a7 += 2;
1095	+	scp->sc_ps = sr & 0xff;
1096	+	EmulatedSR = sr & 0x2700;
1097	+	scp->sc_pc = ReadMacInt32(a7);
1098	+	a7 += 6;
1099	+	scp->sc_sp = regs->a[7] = a7;
1100	+	break;
1101	+	}
1102	+
1103	+	case 0x4e7a:    // movec cr,x
1104	+	switch (pc[1]) {
1105	+	case 0x8801:    // movec vbr,a0
1106	+	regs->a[0] = 0;
1107	+	break;
1108	+	case 0x9801:    // movec vbr,a1
1109	+	regs->a[1] = 0;
1110	+	break;
1111	+	case 0x0002:    // movec cacr,d0
1112	+	regs->d[0] = 0x3111;
1113	+	break;
1114	+	case 0x1002:    // movec cacr,d1
1115	+	regs->d[1] = 0x3111;
1116	+	break;
1117	+	case 0x0003:    // movec tc,d0
1118	+	regs->d[0] = 0;
1119	+	break;
1120	+	case 0x1003:    // movec tc,d1
1121	+	regs->d[1] = 0;
1122	+	break;
1123	+	default:
1124	+	goto ill;
1125	+	}
1126	+	INC_PC(4);
1127	+	break;
1128	+
1129	+	case 0x4e7b:    // movec x,cr
1130	+	switch (pc[1]) {
1131	+	case 0x0801:    // movec d0,vbr
1132	+	break;
1133	+	case 0x0002:    // movec d0,cacr
1134	+	case 0x1002:    // movec d1,cacr
1135	+	FlushCodeCache(NULL, 0);
1136	+	break;
1137	+	default:
1138	+	goto ill;
1139	+	}
1140	+	INC_PC(4);
1141	+	break;
1142	+
1143	+	case 0xf478:    // cpusha dc
1144	+	case 0xf4f8:    // cpusha dc/ic
1145	+	FlushCodeCache(NULL, 0);
1146	+	INC_PC(2);
1147	+	break;
1148	+
1149	+	default:
1150	+	ill:            printf("SIGILL num %d, code %d\n", sig, code);
1151	+	printf(" context %p:\n", scp);
1152	+	printf("  onstack %08x\n", scp->sc_onstack);
1153	+	printf("  sp %08x\n", scp->sc_sp);
1154	+	printf("  fp %08x\n", scp->sc_fp);
1155	+	printf("  pc %08x\n", scp->sc_pc);
1156	+	printf("   opcode %04x\n", opcode);
1157	+	printf("  sr %08x\n", scp->sc_ps);
1158	+	printf(" state %p:\n", state);
1159	+	printf("  flags %d\n", state->ss_flags);
1160	+	for (int i=0; i<8; i++)
1161	+	printf("  d%d %08x\n", i, state->ss_frame.f_regs[i]);
1162	+	for (int i=0; i<8; i++)
1163	+	printf("  a%d %08x\n", i, state->ss_frame.f_regs[i+8]);
1164	+
1165	+	#ifdef ENABLE_MON
1166	+	char *arg[4] = {"mon", "-m", "-r", NULL};
1167	+	mon(3, arg);
1168	+	#endif
1169	+	QuitEmulator();
1170	+	break;
1171		}
449	–	return NULL;
1172		}
1173	+	#endif
1174
1175
1176		/*
1177		*  Display alert
1178		*/
1179
1180	<	#if ENABLE_GTK
1180	>	#ifdef ENABLE_GTK
1181		static void dl_destroyed(void)
1182		{
1183		gtk_main_quit();
#	Line 499 | Line 1222 | void display_alert(int title_id, int pre
1222
1223		void ErrorAlert(const char *text)
1224		{
1225	<	#if ENABLE_GTK
1225	>	#ifdef ENABLE_GTK
1226		if (PrefsFindBool("nogui") || x_display == NULL) {
1227		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
1228		return;
#	Line 518 | Line 1241 | void ErrorAlert(const char *text)
1241
1242		void WarningAlert(const char *text)
1243		{
1244	<	#if ENABLE_GTK
1244	>	#ifdef ENABLE_GTK
1245		if (PrefsFindBool("nogui") || x_display == NULL) {
1246		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
1247		return;

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