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root/cebix/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.22 by gbeauche, 2003-12-04T23:37:38Z vs.
Revision 1.51 by gbeauche, 2004-07-11T08:12:21Z

#	Line 1 | Line 1
1		/*
2		*  sheepshaver_glue.cpp - Glue Kheperix CPU to SheepShaver CPU engine interface
3		*
4	<	*  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
4	>	*  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
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 38 | Line 38
38		#include "name_registry.h"
39		#include "serial.h"
40		#include "ether.h"
41	+	#include "timer.h"
42
43		#include <stdio.h>
44	+	#include <stdlib.h>
45	+
46	+	#ifdef USE_SDL_VIDEO
47	+	#include <SDL_events.h>
48	+	#endif
49
50		#if ENABLE_MON
51		#include "mon.h"
#	Line 50 | Line 56
56		#include "debug.h"
57
58		// Emulation time statistics
59	<	#define EMUL_TIME_STATS 1
59	>	#ifndef EMUL_TIME_STATS
60	>	#define EMUL_TIME_STATS 0
61	>	#endif
62
63		#if EMUL_TIME_STATS
64		static clock_t emul_start_time;
65	<	static uint32 interrupt_count = 0;
65	>	static uint32 interrupt_count = 0, ppc_interrupt_count = 0;
66		static clock_t interrupt_time = 0;
67		static uint32 exec68k_count = 0;
68		static clock_t exec68k_time = 0;
#	Line 73 | Line 81 | static void enter_mon(void)
81		#endif
82		}
83
84	+	// From main_*.cpp
85	+	extern uintptr SignalStackBase();
86	+
87	+	// From rsrc_patches.cpp
88	+	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
89	+
90		// PowerPC EmulOp to exit from emulation looop
91		const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
92
93	<	// Enable multicore (main/interrupts) cpu emulation?
94	<	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
93	>	// Enable interrupt routine safety checks?
94	>	#define SAFE_INTERRUPT_PPC 1
95
96		// Enable Execute68k() safety checks?
97		#define SAFE_EXEC_68K 1
#	Line 95 | Line 109 | const uint32 POWERPC_EXEC_RETURN = POWER
109		static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
110
111		// SIGSEGV handler
112	<	static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
112	>	sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
113	>
114	>	#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
115	>	// Special trampolines for EmulOp and NativeOp
116	>	static uint8 *emul_op_trampoline;
117	>	static uint8 *native_op_trampoline;
118	>	#endif
119
120		// JIT Compiler enabled?
121		static inline bool enable_jit_p()
#	Line 119 | Line 139 | class sheepshaver_cpu
139		void init_decoder();
140		void execute_sheep(uint32 opcode);
141
142	+	// CPU context to preserve on interrupt
143	+	class interrupt_context {
144	+	uint32 gpr[32];
145	+	uint32 pc;
146	+	uint32 lr;
147	+	uint32 ctr;
148	+	uint32 cr;
149	+	uint32 xer;
150	+	sheepshaver_cpu *cpu;
151	+	const char *where;
152	+	public:
153	+	interrupt_context(sheepshaver_cpu *_cpu, const char *_where);
154	+	~interrupt_context();
155	+	};
156	+
157		public:
158
159		// Constructor
160		sheepshaver_cpu();
161
162	<	// Condition Register accessors
162	>	// CR & XER accessors
163		uint32 get_cr() const           { return cr().get(); }
164		void set_cr(uint32 v)           { cr().set(v); }
165	+	uint32 get_xer() const          { return xer().get(); }
166	+	void set_xer(uint32 v)          { xer().set(v); }
167	+
168	+	// Execute NATIVE_OP routine
169	+	void execute_native_op(uint32 native_op);
170	+
171	+	// Execute EMUL_OP routine
172	+	void execute_emul_op(uint32 emul_op);
173
174		// Execute 68k routine
175		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 137 | Line 180 | public:
180		// Execute MacOS/PPC code
181		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
182
183	+	// Compile one instruction
184	+	virtual int compile1(codegen_context_t & cg_context);
185	+
186		// Resource manager thunk
187		void get_resource(uint32 old_get_resource);
188
#	Line 144 | Line 190 | public:
190		void interrupt(uint32 entry);
191		void handle_interrupt();
192
147	–	// Lazy memory allocator (one item at a time)
148	–	void *operator new(size_t size)
149	–	{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
150	–	void operator delete(void *p)
151	–	{ allocator_helper< sheepshaver_cpu, lazy_allocator >::deallocate(p); }
152	–	// FIXME: really make surre array allocation fail at link time?
153	–	void *operator new[](size_t);
154	–	void operator delete[](void *p);
155	–
193		// Make sure the SIGSEGV handler can access CPU registers
194		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
195		};
196
197	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
197	>	// Memory allocator returning areas aligned on 16-byte boundaries
198	>	void *operator new(size_t size)
199	>	{
200	>	void *p;
201	>
202	>	#if defined(HAVE_POSIX_MEMALIGN)
203	>	if (posix_memalign(&p, 16, size) != 0)
204	>	throw std::bad_alloc();
205	>	#elif defined(HAVE_MEMALIGN)
206	>	p = memalign(16, size);
207	>	#elif defined(HAVE_VALLOC)
208	>	p = valloc(size); // page-aligned!
209	>	#else
210	>	/* XXX: handle padding ourselves */
211	>	p = malloc(size);
212	>	#endif
213	>
214	>	return p;
215	>	}
216	>
217	>	void operator delete(void *p)
218	>	{
219	>	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
220	>	#if defined(__GLIBC__)
221	>	// this is known to work only with GNU libc
222	>	free(p);
223	>	#endif
224	>	#else
225	>	free(p);
226	>	#endif
227	>	}
228
229		sheepshaver_cpu::sheepshaver_cpu()
230		: powerpc_cpu(enable_jit_p())
#	Line 167 | Line 234 | sheepshaver_cpu::sheepshaver_cpu()
234
235		void sheepshaver_cpu::init_decoder()
236		{
170	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
171	–	static bool initialized = false;
172	–	if (initialized)
173	–	return;
174	–	initialized = true;
175	–	#endif
176	–
237		static const instr_info_t sheep_ii_table[] = {
238		{ "sheep",
239		(execute_pmf)&sheepshaver_cpu::execute_sheep,
#	Line 192 | Line 252 | void sheepshaver_cpu::init_decoder()
252		}
253		}
254
195	–	// Forward declaration for native opcode handler
196	–	static void NativeOp(int selector);
197	–
255		/*              NativeOp instruction format:
256	<	+------------+--------------------------+--+----------+------------+
257	<	|      6     |                          |FN|    OP    |      2     |
258	<	+------------+--------------------------+--+----------+------------+
259	<	0         5 |6                       19 20 21      25 26        31
256	>	+------------+-------------------------+--+-----------+------------+
257	>	|      6     |                         |FN|    OP     |      2     |
258	>	+------------+-------------------------+--+-----------+------------+
259	>	0         5 |6                      18 19 20      25 26        31
260		*/
261
262	<	typedef bit_field< 20, 20 > FN_field;
263	<	typedef bit_field< 21, 25 > NATIVE_OP_field;
262	>	typedef bit_field< 19, 19 > FN_field;
263	>	typedef bit_field< 20, 25 > NATIVE_OP_field;
264		typedef bit_field< 26, 31 > EMUL_OP_field;
265
266	+	// Execute EMUL_OP routine
267	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
268	+	{
269	+	M68kRegisters r68;
270	+	WriteMacInt32(XLM_68K_R25, gpr(25));
271	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
272	+	for (int i = 0; i < 8; i++)
273	+	r68.d[i] = gpr(8 + i);
274	+	for (int i = 0; i < 7; i++)
275	+	r68.a[i] = gpr(16 + i);
276	+	r68.a[7] = gpr(1);
277	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
278	+	uint32 saved_xer = get_xer();
279	+	EmulOp(&r68, gpr(24), emul_op);
280	+	set_cr(saved_cr);
281	+	set_xer(saved_xer);
282	+	for (int i = 0; i < 8; i++)
283	+	gpr(8 + i) = r68.d[i];
284	+	for (int i = 0; i < 7; i++)
285	+	gpr(16 + i) = r68.a[i];
286	+	gpr(1) = r68.a[7];
287	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
288	+	}
289	+
290		// Execute SheepShaver instruction
291		void sheepshaver_cpu::execute_sheep(uint32 opcode)
292		{
#	Line 222 | Line 303 | void sheepshaver_cpu::execute_sheep(uint
303		break;
304
305		case 2:         // EXEC_NATIVE
306	<	NativeOp(NATIVE_OP_field::extract(opcode));
306	>	execute_native_op(NATIVE_OP_field::extract(opcode));
307		if (FN_field::test(opcode))
308		pc() = lr();
309		else
310		pc() += 4;
311		break;
312
313	<	default: {      // EMUL_OP
314	<	M68kRegisters r68;
234	<	WriteMacInt32(XLM_68K_R25, gpr(25));
235	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
236	<	for (int i = 0; i < 8; i++)
237	<	r68.d[i] = gpr(8 + i);
238	<	for (int i = 0; i < 7; i++)
239	<	r68.a[i] = gpr(16 + i);
240	<	r68.a[7] = gpr(1);
241	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
242	<	for (int i = 0; i < 8; i++)
243	<	gpr(8 + i) = r68.d[i];
244	<	for (int i = 0; i < 7; i++)
245	<	gpr(16 + i) = r68.a[i];
246	<	gpr(1) = r68.a[7];
247	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
313	>	default:        // EMUL_OP
314	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
315		pc() += 4;
316		break;
317		}
318	+	}
319	+
320	+	// Compile one instruction
321	+	int sheepshaver_cpu::compile1(codegen_context_t & cg_context)
322	+	{
323	+	#if PPC_ENABLE_JIT
324	+	const instr_info_t *ii = cg_context.instr_info;
325	+	if (ii->mnemo != PPC_I(SHEEP))
326	+	return COMPILE_FAILURE;
327	+
328	+	int status = COMPILE_FAILURE;
329	+	powerpc_dyngen & dg = cg_context.codegen;
330	+	uint32 opcode = cg_context.opcode;
331	+
332	+	switch (opcode & 0x3f) {
333	+	case 0:         // EMUL_RETURN
334	+	dg.gen_invoke(QuitEmulator);
335	+	status = COMPILE_CODE_OK;
336	+	break;
337	+
338	+	case 1:         // EXEC_RETURN
339	+	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
340	+	// Don't check for pending interrupts, we do know we have to
341	+	// get out of this block ASAP
342	+	dg.gen_exec_return();
343	+	status = COMPILE_EPILOGUE_OK;
344	+	break;
345	+
346	+	case 2: {       // EXEC_NATIVE
347	+	uint32 selector = NATIVE_OP_field::extract(opcode);
348	+	switch (selector) {
349	+	#if !PPC_REENTRANT_JIT
350	+	// Filter out functions that may invoke Execute68k() or
351	+	// CallMacOS(), this would break reentrancy as they could
352	+	// invalidate the translation cache and even overwrite
353	+	// continuation code when we are done with them.
354	+	case NATIVE_PATCH_NAME_REGISTRY:
355	+	dg.gen_invoke(DoPatchNameRegistry);
356	+	status = COMPILE_CODE_OK;
357	+	break;
358	+	case NATIVE_VIDEO_INSTALL_ACCEL:
359	+	dg.gen_invoke(VideoInstallAccel);
360	+	status = COMPILE_CODE_OK;
361	+	break;
362	+	case NATIVE_VIDEO_VBL:
363	+	dg.gen_invoke(VideoVBL);
364	+	status = COMPILE_CODE_OK;
365	+	break;
366	+	case NATIVE_GET_RESOURCE:
367	+	case NATIVE_GET_1_RESOURCE:
368	+	case NATIVE_GET_IND_RESOURCE:
369	+	case NATIVE_GET_1_IND_RESOURCE:
370	+	case NATIVE_R_GET_RESOURCE: {
371	+	static const uint32 get_resource_ptr[] = {
372	+	XLM_GET_RESOURCE,
373	+	XLM_GET_1_RESOURCE,
374	+	XLM_GET_IND_RESOURCE,
375	+	XLM_GET_1_IND_RESOURCE,
376	+	XLM_R_GET_RESOURCE
377	+	};
378	+	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
379	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
380	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
381	+	dg.gen_invoke_CPU_im(func, old_get_resource);
382	+	status = COMPILE_CODE_OK;
383	+	break;
384	+	}
385	+	case NATIVE_CHECK_LOAD_INVOC:
386	+	dg.gen_load_T0_GPR(3);
387	+	dg.gen_load_T1_GPR(4);
388	+	dg.gen_se_16_32_T1();
389	+	dg.gen_load_T2_GPR(5);
390	+	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
391	+	status = COMPILE_CODE_OK;
392	+	break;
393	+	#endif
394	+	case NATIVE_BITBLT:
395	+	dg.gen_load_T0_GPR(3);
396	+	dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
397	+	status = COMPILE_CODE_OK;
398	+	break;
399	+	case NATIVE_INVRECT:
400	+	dg.gen_load_T0_GPR(3);
401	+	dg.gen_invoke_T0((void (*)(uint32))NQD_invrect);
402	+	status = COMPILE_CODE_OK;
403	+	break;
404	+	case NATIVE_FILLRECT:
405	+	dg.gen_load_T0_GPR(3);
406	+	dg.gen_invoke_T0((void (*)(uint32))NQD_fillrect);
407	+	status = COMPILE_CODE_OK;
408	+	break;
409	+	}
410	+	// Could we fully translate this NativeOp?
411	+	if (status == COMPILE_CODE_OK) {
412	+	if (!FN_field::test(opcode))
413	+	cg_context.done_compile = false;
414	+	else {
415	+	dg.gen_load_A0_LR();
416	+	dg.gen_set_PC_A0();
417	+	cg_context.done_compile = true;
418	+	}
419	+	break;
420	+	}
421	+	#if PPC_REENTRANT_JIT
422	+	// Try to execute NativeOp trampoline
423	+	if (!FN_field::test(opcode))
424	+	dg.gen_set_PC_im(cg_context.pc + 4);
425	+	else {
426	+	dg.gen_load_A0_LR();
427	+	dg.gen_set_PC_A0();
428	+	}
429	+	dg.gen_mov_32_T0_im(selector);
430	+	dg.gen_jmp(native_op_trampoline);
431	+	cg_context.done_compile = true;
432	+	status = COMPILE_EPILOGUE_OK;
433	+	break;
434	+	#endif
435	+	// Invoke NativeOp handler
436	+	if (!FN_field::test(opcode)) {
437	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
438	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_native_op).ptr();
439	+	dg.gen_invoke_CPU_im(func, selector);
440	+	cg_context.done_compile = false;
441	+	status = COMPILE_CODE_OK;
442	+	}
443	+	// Otherwise, let it generate a call to execute_sheep() which
444	+	// will cause necessary updates to the program counter
445	+	break;
446	+	}
447	+
448	+	default: {      // EMUL_OP
449	+	uint32 emul_op = EMUL_OP_field::extract(opcode) - 3;
450	+	#if PPC_REENTRANT_JIT
451	+	// Try to execute EmulOp trampoline
452	+	dg.gen_set_PC_im(cg_context.pc + 4);
453	+	dg.gen_mov_32_T0_im(emul_op);
454	+	dg.gen_jmp(emul_op_trampoline);
455	+	cg_context.done_compile = true;
456	+	status = COMPILE_EPILOGUE_OK;
457	+	break;
458	+	#endif
459	+	// Invoke EmulOp handler
460	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
461	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
462	+	dg.gen_invoke_CPU_im(func, emul_op);
463	+	cg_context.done_compile = false;
464	+	status = COMPILE_CODE_OK;
465	+	break;
466	+	}
467		}
468	+	return status;
469	+	#endif
470	+	return COMPILE_FAILURE;
471	+	}
472	+
473	+	// CPU context to preserve on interrupt
474	+	sheepshaver_cpu::interrupt_context::interrupt_context(sheepshaver_cpu *_cpu, const char *_where)
475	+	{
476	+	#if SAFE_INTERRUPT_PPC >= 2
477	+	cpu = _cpu;
478	+	where = _where;
479	+
480	+	// Save interrupt context
481	+	memcpy(&gpr[0], &cpu->gpr(0), sizeof(gpr));
482	+	pc = cpu->pc();
483	+	lr = cpu->lr();
484	+	ctr = cpu->ctr();
485	+	cr = cpu->get_cr();
486	+	xer = cpu->get_xer();
487	+	#endif
488	+	}
489	+
490	+	sheepshaver_cpu::interrupt_context::~interrupt_context()
491	+	{
492	+	#if SAFE_INTERRUPT_PPC >= 2
493	+	// Check whether CPU context was preserved by interrupt
494	+	if (memcmp(&gpr[0], &cpu->gpr(0), sizeof(gpr)) != 0) {
495	+	printf("FATAL: %s: interrupt clobbers registers\n", where);
496	+	for (int i = 0; i < 32; i++)
497	+	if (gpr[i] != cpu->gpr(i))
498	+	printf(" r%d: %08x -> %08x\n", i, gpr[i], cpu->gpr(i));
499	+	}
500	+	if (pc != cpu->pc())
501	+	printf("FATAL: %s: interrupt clobbers PC\n", where);
502	+	if (lr != cpu->lr())
503	+	printf("FATAL: %s: interrupt clobbers LR\n", where);
504	+	if (ctr != cpu->ctr())
505	+	printf("FATAL: %s: interrupt clobbers CTR\n", where);
506	+	if (cr != cpu->get_cr())
507	+	printf("FATAL: %s: interrupt clobbers CR\n", where);
508	+	if (xer != cpu->get_xer())
509	+	printf("FATAL: %s: interrupt clobbers XER\n", where);
510	+	#endif
511		}
512
513		// Handle MacOS interrupt
514		void sheepshaver_cpu::interrupt(uint32 entry)
515		{
516		#if EMUL_TIME_STATS
517	<	interrupt_count++;
517	>	ppc_interrupt_count++;
518		const clock_t interrupt_start = clock();
519		#endif
520
521	<	#if !MULTICORE_CPU
521	>	#if SAFE_INTERRUPT_PPC
522	>	static int depth = 0;
523	>	if (depth != 0)
524	>	printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
525	>	depth++;
526	>	#endif
527	>
528		// Save program counters and branch registers
529		uint32 saved_pc = pc();
530		uint32 saved_lr = lr();
531		uint32 saved_ctr= ctr();
532		uint32 saved_sp = gpr(1);
268	–	#endif
533
534		// Initialize stack pointer to SheepShaver alternate stack base
535	<	SheepArray<64> stack_area;
272	<	gpr(1) = stack_area.addr();
535	>	gpr(1) = SignalStackBase() - 64;
536
537		// Build trampoline to return from interrupt
538		SheepVar32 trampoline = POWERPC_EXEC_RETURN;
#	Line 306 | Line 569 | void sheepshaver_cpu::interrupt(uint32 e
569		// Enter nanokernel
570		execute(entry);
571
309	–	#if !MULTICORE_CPU
572		// Restore program counters and branch registers
573		pc() = saved_pc;
574		lr() = saved_lr;
575		ctr()= saved_ctr;
576		gpr(1) = saved_sp;
315	–	#endif
577
578		#if EMUL_TIME_STATS
579		interrupt_time += (clock() - interrupt_start);
580		#endif
581	+
582	+	#if SAFE_INTERRUPT_PPC
583	+	depth--;
584	+	#endif
585		}
586
587		// Execute 68k routine
#	Line 485 | Line 750 | inline void sheepshaver_cpu::execute_ppc
750		}
751
752		// Resource Manager thunk
488	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
489	–
753		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
754		{
755		uint32 type = gpr(3);
#	Line 512 | Line 775 | inline void sheepshaver_cpu::get_resourc
775		*              SheepShaver CPU engine interface
776		**/
777
778	<	static sheepshaver_cpu *main_cpu = NULL;                // CPU emulator to handle usual control flow
779	<	static sheepshaver_cpu *interrupt_cpu = NULL;   // CPU emulator to handle interrupts
517	<	static sheepshaver_cpu *current_cpu = NULL;             // Current CPU emulator context
778	>	// PowerPC CPU emulator
779	>	static sheepshaver_cpu *ppc_cpu = NULL;
780
781		void FlushCodeCache(uintptr start, uintptr end)
782		{
783		D(bug("FlushCodeCache(%08x, %08x)\n", start, end));
784	<	main_cpu->invalidate_cache_range(start, end);
523	<	#if MULTICORE_CPU
524	<	interrupt_cpu->invalidate_cache_range(start, end);
525	<	#endif
526	<	}
527	<
528	<	static inline void cpu_push(sheepshaver_cpu *new_cpu)
529	<	{
530	<	#if MULTICORE_CPU
531	<	current_cpu = new_cpu;
532	<	#endif
533	<	}
534	<
535	<	static inline void cpu_pop()
536	<	{
537	<	#if MULTICORE_CPU
538	<	current_cpu = main_cpu;
539	<	#endif
784	>	ppc_cpu->invalidate_cache_range(start, end);
785		}
786
787		// Dump PPC registers
788		static void dump_registers(void)
789		{
790	<	current_cpu->dump_registers();
790	>	ppc_cpu->dump_registers();
791		}
792
793		// Dump log
794		static void dump_log(void)
795		{
796	<	current_cpu->dump_log();
796	>	ppc_cpu->dump_log();
797		}
798
799		/*
800		*  Initialize CPU emulation
801		*/
802
803	<	static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
803	>	sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
804		{
805		#if ENABLE_VOSF
806		// Handle screen fault
#	Line 571 | Line 816 | static sigsegv_return_t sigsegv_handler(
816		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
817
818		// Get program counter of target CPU
819	<	sheepshaver_cpu * const cpu = current_cpu;
819	>	sheepshaver_cpu * const cpu = ppc_cpu;
820		const uint32 pc = cpu->pc();
821
822		// Fault in Mac ROM or RAM?
823	<	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
823	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize)) || (pc >= DR_CACHE_BASE && pc < (DR_CACHE_BASE + DR_CACHE_SIZE));
824		if (mac_fault) {
825
826		// "VM settings" during MacOS 8 installation
#	Line 595 | Line 840 | static sigsegv_return_t sigsegv_handler(
840		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
841		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
842		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
843	+
844	+	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
845	+	else if ((pc - DR_CACHE_BASE) < DR_CACHE_SIZE && (cpu->gpr(16) == 0xf3012002 || cpu->gpr(16) == 0xf3012000))
846	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
847	+	else if ((pc - DR_CACHE_BASE) < DR_CACHE_SIZE && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
848	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
849	+
850	+	// Ignore writes to the zero page
851	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
852	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
853
854		// Ignore all other faults, if requested
855		if (PrefsFindBool("ignoresegv"))
#	Line 607 | Line 862 | static sigsegv_return_t sigsegv_handler(
862		printf("SIGSEGV\n");
863		printf("  pc %p\n", fault_instruction);
864		printf("  ea %p\n", fault_address);
610	–	printf(" cpu %s\n", current_cpu == main_cpu ? "main" : "interrupts");
865		dump_registers();
866	<	current_cpu->dump_log();
866	>	ppc_cpu->dump_log();
867		enter_mon();
868		QuitEmulator();
869
#	Line 619 | Line 873 | static sigsegv_return_t sigsegv_handler(
873		void init_emul_ppc(void)
874		{
875		// Initialize main CPU emulator
876	<	main_cpu = new sheepshaver_cpu();
877	<	main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
876	>	ppc_cpu = new sheepshaver_cpu();
877	>	ppc_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
878	>	ppc_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
879		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
880
626	–	#if MULTICORE_CPU
627	–	// Initialize alternate CPU emulator to handle interrupts
628	–	interrupt_cpu = new sheepshaver_cpu();
629	–	#endif
630	–
631	–	// Install the handler for SIGSEGV
632	–	sigsegv_install_handler(sigsegv_handler);
633	–
881		#if ENABLE_MON
882		// Install "regs" command in cxmon
883		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
#	Line 656 | Line 903 | void exit_emul_ppc(void)
903		printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
904		printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
905		(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
906	+	printf("Total ppc interrupt count: %d (%2.1f %%)\n", ppc_interrupt_count,
907	+	(double(ppc_interrupt_count) * 100.0) / double(interrupt_count));
908
909		#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
910		printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
#	Line 672 | Line 921 | void exit_emul_ppc(void)
921		printf("\n");
922		#endif
923
924	<	delete main_cpu;
925	<	#if MULTICORE_CPU
926	<	delete interrupt_cpu;
927	<	#endif
924	>	delete ppc_cpu;
925	>	}
926	>
927	>	#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
928	>	// Initialize EmulOp trampolines
929	>	void init_emul_op_trampolines(basic_dyngen & dg)
930	>	{
931	>	typedef void (*func_t)(dyngen_cpu_base, uint32);
932	>	func_t func;
933	>
934	>	// EmulOp
935	>	emul_op_trampoline = dg.gen_start();
936	>	func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
937	>	dg.gen_invoke_CPU_T0(func);
938	>	dg.gen_exec_return();
939	>	dg.gen_end();
940	>
941	>	// NativeOp
942	>	native_op_trampoline = dg.gen_start();
943	>	func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_native_op).ptr();
944	>	dg.gen_invoke_CPU_T0(func);
945	>	dg.gen_exec_return();
946	>	dg.gen_end();
947	>
948	>	D(bug("EmulOp trampoline:   %p\n", emul_op_trampoline));
949	>	D(bug("NativeOp trampoline: %p\n", native_op_trampoline));
950		}
951	+	#endif
952
953		/*
954		*  Emulation loop
#	Line 684 | Line 956 | void exit_emul_ppc(void)
956
957		void emul_ppc(uint32 entry)
958		{
959	<	current_cpu = main_cpu;
960	<	#if DEBUG
689	<	current_cpu->start_log();
959	>	#if 0
960	>	ppc_cpu->start_log();
961		#endif
962		// start emulation loop and enable code translation or caching
963	<	current_cpu->execute(entry);
963	>	ppc_cpu->execute(entry);
964		}
965
966		/*
967		*  Handle PowerPC interrupt
968		*/
969
699	–	#if ASYNC_IRQ
700	–	void HandleInterrupt(void)
701	–	{
702	–	main_cpu->handle_interrupt();
703	–	}
704	–	#else
970		void TriggerInterrupt(void)
971		{
972		#if 0
973		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
974		#else
975		// Trigger interrupt to main cpu only
976	<	if (main_cpu)
977	<	main_cpu->trigger_interrupt();
976	>	if (ppc_cpu)
977	>	ppc_cpu->trigger_interrupt();
978		#endif
979		}
715	–	#endif
980
981		void sheepshaver_cpu::handle_interrupt(void)
982		{
983	+	#ifdef USE_SDL_VIDEO
984	+	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
985	+	SDL_PumpEvents();
986	+	#endif
987	+
988		// Do nothing if interrupts are disabled
989	<	if (*(int32 *)XLM_IRQ_NEST > 0)
989	>	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
990		return;
991
992	<	// Do nothing if there is no interrupt pending
993	<	if (InterruptFlags == 0)
994	<	return;
992	>	// Current interrupt nest level
993	>	static int interrupt_depth = 0;
994	>	++interrupt_depth;
995	>	#if EMUL_TIME_STATS
996	>	interrupt_count++;
997	>	#endif
998
999		// Disable MacOS stack sniffer
1000		WriteMacInt32(0x110, 0);
#	Line 731 | Line 1003 | void sheepshaver_cpu::handle_interrupt(v
1003		switch (ReadMacInt32(XLM_RUN_MODE)) {
1004		case MODE_68K:
1005		// 68k emulator active, trigger 68k interrupt level 1
734	–	assert(current_cpu == main_cpu);
1006		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
1007		set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
1008		break;
#	Line 739 | Line 1010 | void sheepshaver_cpu::handle_interrupt(v
1010		#if INTERRUPTS_IN_NATIVE_MODE
1011		case MODE_NATIVE:
1012		// 68k emulator inactive, in nanokernel?
1013	<	assert(current_cpu == main_cpu);
1014	<	if (gpr(1) != KernelDataAddr) {
1013	>	if (gpr(1) != KernelDataAddr && interrupt_depth == 1) {
1014	>	interrupt_context ctx(this, "PowerPC mode");
1015	>
1016		// Prepare for 68k interrupt level 1
1017		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
1018		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 749 | Line 1021 | void sheepshaver_cpu::handle_interrupt(v
1021
1022		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1023		DisableInterrupt();
752	–	cpu_push(interrupt_cpu);
1024		if (ROMType == ROMTYPE_NEWWORLD)
1025	<	current_cpu->interrupt(ROM_BASE + 0x312b1c);
1025	>	ppc_cpu->interrupt(ROM_BASE + 0x312b1c);
1026		else
1027	<	current_cpu->interrupt(ROM_BASE + 0x312a3c);
757	<	cpu_pop();
1027	>	ppc_cpu->interrupt(ROM_BASE + 0x312a3c);
1028		}
1029		break;
1030		#endif
#	Line 763 | Line 1033 | void sheepshaver_cpu::handle_interrupt(v
1033		case MODE_EMUL_OP:
1034		// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
1035		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1036	+	interrupt_context ctx(this, "68k mode");
1037	+	#if EMUL_TIME_STATS
1038	+	const clock_t interrupt_start = clock();
1039	+	#endif
1040		#if 1
1041		// Execute full 68k interrupt routine
1042		M68kRegisters r;
#	Line 788 | Line 1062 | void sheepshaver_cpu::handle_interrupt(v
1062		}
1063		}
1064		#endif
1065	+	#if EMUL_TIME_STATS
1066	+	interrupt_time += (clock() - interrupt_start);
1067	+	#endif
1068		}
1069		break;
1070		#endif
1071		}
1072	+
1073	+	// We are done with this interrupt
1074	+	--interrupt_depth;
1075		}
1076
1077		static void get_resource(void);
#	Line 800 | Line 1080 | static void get_ind_resource(void);
1080		static void get_1_ind_resource(void);
1081		static void r_get_resource(void);
1082
1083	<	#define GPR(REG) current_cpu->gpr(REG)
1084	<
805	<	static void NativeOp(int selector)
1083	>	// Execute NATIVE_OP routine
1084	>	void sheepshaver_cpu::execute_native_op(uint32 selector)
1085		{
1086		#if EMUL_TIME_STATS
1087		native_exec_count++;
#	Line 820 | Line 1099 | static void NativeOp(int selector)
1099		VideoVBL();
1100		break;
1101		case NATIVE_VIDEO_DO_DRIVER_IO:
1102	<	GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
1103	<	(void *)GPR(5), GPR(6), GPR(7));
1102	>	gpr(3) = (int32)(int16)VideoDoDriverIO((void *)gpr(3), (void *)gpr(4),
1103	>	(void *)gpr(5), gpr(6), gpr(7));
1104		break;
1105		#ifdef WORDS_BIGENDIAN
1106		case NATIVE_ETHER_IRQ:
1107		EtherIRQ();
1108		break;
1109		case NATIVE_ETHER_INIT:
1110	<	GPR(3) = InitStreamModule((void *)GPR(3));
1110	>	gpr(3) = InitStreamModule((void *)gpr(3));
1111		break;
1112		case NATIVE_ETHER_TERM:
1113		TerminateStreamModule();
1114		break;
1115		case NATIVE_ETHER_OPEN:
1116	<	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
1116	>	gpr(3) = ether_open((queue_t *)gpr(3), (void *)gpr(4), gpr(5), gpr(6), (void*)gpr(7));
1117		break;
1118		case NATIVE_ETHER_CLOSE:
1119	<	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
1119	>	gpr(3) = ether_close((queue_t *)gpr(3), gpr(4), (void *)gpr(5));
1120		break;
1121		case NATIVE_ETHER_WPUT:
1122	<	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
1122	>	gpr(3) = ether_wput((queue_t *)gpr(3), (mblk_t *)gpr(4));
1123		break;
1124		case NATIVE_ETHER_RSRV:
1125	<	GPR(3) = ether_rsrv((queue_t *)GPR(3));
1125	>	gpr(3) = ether_rsrv((queue_t *)gpr(3));
1126		break;
1127		#else
1128		case NATIVE_ETHER_INIT:
1129		// FIXME: needs more complicated thunks
1130	<	GPR(3) = false;
1130	>	gpr(3) = false;
1131		break;
1132		#endif
1133	+	case NATIVE_SYNC_HOOK:
1134	+	gpr(3) = NQD_sync_hook(gpr(3));
1135	+	break;
1136	+	case NATIVE_BITBLT_HOOK:
1137	+	gpr(3) = NQD_bitblt_hook(gpr(3));
1138	+	break;
1139	+	case NATIVE_BITBLT:
1140	+	NQD_bitblt(gpr(3));
1141	+	break;
1142	+	case NATIVE_FILLRECT_HOOK:
1143	+	gpr(3) = NQD_fillrect_hook(gpr(3));
1144	+	break;
1145	+	case NATIVE_INVRECT:
1146	+	NQD_invrect(gpr(3));
1147	+	break;
1148	+	case NATIVE_FILLRECT:
1149	+	NQD_fillrect(gpr(3));
1150	+	break;
1151		case NATIVE_SERIAL_NOTHING:
1152		case NATIVE_SERIAL_OPEN:
1153		case NATIVE_SERIAL_PRIME_IN:
#	Line 868 | Line 1165 | static void NativeOp(int selector)
1165		SerialStatus,
1166		SerialClose
1167		};
1168	<	GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
1168	>	gpr(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](gpr(3), gpr(4));
1169		break;
1170		}
1171		case NATIVE_GET_RESOURCE:
#	Line 878 | Line 1175 | static void NativeOp(int selector)
1175		case NATIVE_R_GET_RESOURCE: {
1176		typedef void (*GetResourceCallback)(void);
1177		static const GetResourceCallback get_resource_callbacks[] = {
1178	<	get_resource,
1179	<	get_1_resource,
1180	<	get_ind_resource,
1181	<	get_1_ind_resource,
1182	<	r_get_resource
1178	>	::get_resource,
1179	>	::get_1_resource,
1180	>	::get_ind_resource,
1181	>	::get_1_ind_resource,
1182	>	::r_get_resource
1183		};
1184		get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
1185		break;
1186		}
890	–	case NATIVE_DISABLE_INTERRUPT:
891	–	DisableInterrupt();
892	–	break;
893	–	case NATIVE_ENABLE_INTERRUPT:
894	–	EnableInterrupt();
895	–	break;
1187		case NATIVE_MAKE_EXECUTABLE:
1188	<	MakeExecutable(0, (void *)GPR(4), GPR(5));
1188	>	MakeExecutable(0, (void *)gpr(4), gpr(5));
1189	>	break;
1190	>	case NATIVE_CHECK_LOAD_INVOC:
1191	>	check_load_invoc(gpr(3), gpr(4), gpr(5));
1192		break;
1193		default:
1194		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
#	Line 915 | Line 1209 | static void NativeOp(int selector)
1209
1210		void Execute68k(uint32 pc, M68kRegisters *r)
1211		{
1212	<	current_cpu->execute_68k(pc, r);
1212	>	ppc_cpu->execute_68k(pc, r);
1213		}
1214
1215		/*
#	Line 938 | Line 1232 | void Execute68kTrap(uint16 trap, M68kReg
1232
1233		uint32 call_macos(uint32 tvect)
1234		{
1235	<	return current_cpu->execute_macos_code(tvect, 0, NULL);
1235	>	return ppc_cpu->execute_macos_code(tvect, 0, NULL);
1236		}
1237
1238		uint32 call_macos1(uint32 tvect, uint32 arg1)
1239		{
1240		const uint32 args[] = { arg1 };
1241	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1241	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1242		}
1243
1244		uint32 call_macos2(uint32 tvect, uint32 arg1, uint32 arg2)
1245		{
1246		const uint32 args[] = { arg1, arg2 };
1247	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1247	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1248		}
1249
1250		uint32 call_macos3(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3)
1251		{
1252		const uint32 args[] = { arg1, arg2, arg3 };
1253	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1253	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1254		}
1255
1256		uint32 call_macos4(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4)
1257		{
1258		const uint32 args[] = { arg1, arg2, arg3, arg4 };
1259	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1259	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1260		}
1261
1262		uint32 call_macos5(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5)
1263		{
1264		const uint32 args[] = { arg1, arg2, arg3, arg4, arg5 };
1265	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1265	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1266		}
1267
1268		uint32 call_macos6(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6)
1269		{
1270		const uint32 args[] = { arg1, arg2, arg3, arg4, arg5, arg6 };
1271	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1271	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1272		}
1273
1274		uint32 call_macos7(uint32 tvect, uint32 arg1, uint32 arg2, uint32 arg3, uint32 arg4, uint32 arg5, uint32 arg6, uint32 arg7)
1275		{
1276		const uint32 args[] = { arg1, arg2, arg3, arg4, arg5, arg6, arg7 };
1277	<	return current_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1277	>	return ppc_cpu->execute_macos_code(tvect, sizeof(args)/sizeof(args[0]), args);
1278		}
1279
1280		/*
#	Line 989 | Line 1283 | uint32 call_macos7(uint32 tvect, uint32
1283
1284		void get_resource(void)
1285		{
1286	<	current_cpu->get_resource(ReadMacInt32(XLM_GET_RESOURCE));
1286	>	ppc_cpu->get_resource(ReadMacInt32(XLM_GET_RESOURCE));
1287		}
1288
1289		void get_1_resource(void)
1290		{
1291	<	current_cpu->get_resource(ReadMacInt32(XLM_GET_1_RESOURCE));
1291	>	ppc_cpu->get_resource(ReadMacInt32(XLM_GET_1_RESOURCE));
1292		}
1293
1294		void get_ind_resource(void)
1295		{
1296	<	current_cpu->get_resource(ReadMacInt32(XLM_GET_IND_RESOURCE));
1296	>	ppc_cpu->get_resource(ReadMacInt32(XLM_GET_IND_RESOURCE));
1297		}
1298
1299		void get_1_ind_resource(void)
1300		{
1301	<	current_cpu->get_resource(ReadMacInt32(XLM_GET_1_IND_RESOURCE));
1301	>	ppc_cpu->get_resource(ReadMacInt32(XLM_GET_1_IND_RESOURCE));
1302		}
1303
1304		void r_get_resource(void)
1305		{
1306	<	current_cpu->get_resource(ReadMacInt32(XLM_R_GET_RESOURCE));
1306	>	ppc_cpu->get_resource(ReadMacInt32(XLM_R_GET_RESOURCE));
1307		}

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