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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.55 by gbeauche, 2004-12-18T18:40:04Z vs.
Revision 1.67 by gbeauche, 2006-01-21T17:18:53Z

#	Line 1 | Line 1
1		/*
2		*  sheepshaver_glue.cpp - Glue Kheperix CPU to SheepShaver CPU engine interface
3		*
4	<	*  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
4	>	*  SheepShaver (C) 1997-2005 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 93 | Line 93 | extern "C" void check_load_invoc(uint32
93		// PowerPC EmulOp to exit from emulation looop
94		const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
95
96	–	// Enable interrupt routine safety checks?
97	–	#define SAFE_INTERRUPT_PPC 1
98	–
96		// Enable Execute68k() safety checks?
97		#define SAFE_EXEC_68K 1
98
#	Line 142 | Line 139 | class sheepshaver_cpu
139		void init_decoder();
140		void execute_sheep(uint32 opcode);
141
145	–	// CPU context to preserve on interrupt
146	–	class interrupt_context {
147	–	uint32 gpr[32];
148	–	uint32 pc;
149	–	uint32 lr;
150	–	uint32 ctr;
151	–	uint32 cr;
152	–	uint32 xer;
153	–	sheepshaver_cpu *cpu;
154	–	const char *where;
155	–	public:
156	–	interrupt_context(sheepshaver_cpu *_cpu, const char *_where);
157	–	~interrupt_context();
158	–	};
159	–
142		public:
143
144		// Constructor
#	Line 192 | Line 174 | public:
174
175		// Handle MacOS interrupt
176		void interrupt(uint32 entry);
195	–	void handle_interrupt();
177
178		// Make sure the SIGSEGV handler can access CPU registers
179		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
199	–
200	–	// Memory allocator returning areas aligned on 16-byte boundaries
201	–	void *operator new(size_t size);
202	–	void operator delete(void *p);
180		};
181
205	–	// Memory allocator returning areas aligned on 16-byte boundaries
206	–	void *sheepshaver_cpu::operator new(size_t size)
207	–	{
208	–	void *p;
209	–
210	–	#if defined(HAVE_POSIX_MEMALIGN)
211	–	if (posix_memalign(&p, 16, size) != 0)
212	–	throw std::bad_alloc();
213	–	#elif defined(HAVE_MEMALIGN)
214	–	p = memalign(16, size);
215	–	#elif defined(HAVE_VALLOC)
216	–	p = valloc(size); // page-aligned!
217	–	#else
218	–	/* XXX: handle padding ourselves */
219	–	p = malloc(size);
220	–	#endif
221	–
222	–	return p;
223	–	}
224	–
225	–	void sheepshaver_cpu::operator delete(void *p)
226	–	{
227	–	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
228	–	#if defined(__GLIBC__)
229	–	// this is known to work only with GNU libc
230	–	free(p);
231	–	#endif
232	–	#else
233	–	free(p);
234	–	#endif
235	–	}
236	–
182		sheepshaver_cpu::sheepshaver_cpu()
183		: powerpc_cpu(enable_jit_p())
184		{
#	Line 282 | Line 227 | void sheepshaver_cpu::execute_emul_op(ui
227		for (int i = 0; i < 7; i++)
228		r68.a[i] = gpr(16 + i);
229		r68.a[7] = gpr(1);
230	<	uint32 saved_cr = get_cr() & CR_field<2>::mask();
230	>	uint32 saved_cr = get_cr() & 0xff9fffff; // mask_operand::compute(11, 8)
231		uint32 saved_xer = get_xer();
232		EmulOp(&r68, gpr(24), emul_op);
233		set_cr(saved_cr);
#	Line 477 | Line 422 | int sheepshaver_cpu::compile1(codegen_co
422		}
423		#endif
424
480	–	// CPU context to preserve on interrupt
481	–	sheepshaver_cpu::interrupt_context::interrupt_context(sheepshaver_cpu *_cpu, const char *_where)
482	–	{
483	–	#if SAFE_INTERRUPT_PPC >= 2
484	–	cpu = _cpu;
485	–	where = _where;
486	–
487	–	// Save interrupt context
488	–	memcpy(&gpr[0], &cpu->gpr(0), sizeof(gpr));
489	–	pc = cpu->pc();
490	–	lr = cpu->lr();
491	–	ctr = cpu->ctr();
492	–	cr = cpu->get_cr();
493	–	xer = cpu->get_xer();
494	–	#endif
495	–	}
496	–
497	–	sheepshaver_cpu::interrupt_context::~interrupt_context()
498	–	{
499	–	#if SAFE_INTERRUPT_PPC >= 2
500	–	// Check whether CPU context was preserved by interrupt
501	–	if (memcmp(&gpr[0], &cpu->gpr(0), sizeof(gpr)) != 0) {
502	–	printf("FATAL: %s: interrupt clobbers registers\n", where);
503	–	for (int i = 0; i < 32; i++)
504	–	if (gpr[i] != cpu->gpr(i))
505	–	printf(" r%d: %08x -> %08x\n", i, gpr[i], cpu->gpr(i));
506	–	}
507	–	if (pc != cpu->pc())
508	–	printf("FATAL: %s: interrupt clobbers PC\n", where);
509	–	if (lr != cpu->lr())
510	–	printf("FATAL: %s: interrupt clobbers LR\n", where);
511	–	if (ctr != cpu->ctr())
512	–	printf("FATAL: %s: interrupt clobbers CTR\n", where);
513	–	if (cr != cpu->get_cr())
514	–	printf("FATAL: %s: interrupt clobbers CR\n", where);
515	–	if (xer != cpu->get_xer())
516	–	printf("FATAL: %s: interrupt clobbers XER\n", where);
517	–	#endif
518	–	}
519	–
425		// Handle MacOS interrupt
426		void sheepshaver_cpu::interrupt(uint32 entry)
427		{
#	Line 525 | Line 430 | void sheepshaver_cpu::interrupt(uint32 e
430		const clock_t interrupt_start = clock();
431		#endif
432
528	–	#if SAFE_INTERRUPT_PPC
529	–	static int depth = 0;
530	–	if (depth != 0)
531	–	printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
532	–	depth++;
533	–	#endif
534	–
433		// Save program counters and branch registers
434		uint32 saved_pc = pc();
435		uint32 saved_lr = lr();
#	Line 585 | Line 483 | void sheepshaver_cpu::interrupt(uint32 e
483		#if EMUL_TIME_STATS
484		interrupt_time += (clock() - interrupt_start);
485		#endif
588	–
589	–	#if SAFE_INTERRUPT_PPC
590	–	depth--;
591	–	#endif
486		}
487
488		// Execute 68k routine
#	Line 866 | Line 760 | sigsegv_return_t sigsegv_handler(sigsegv
760		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
761		#endif
762
763	<	printf("SIGSEGV\n");
764	<	printf("  pc %p\n", fault_instruction);
765	<	printf("  ea %p\n", fault_address);
763	>	fprintf(stderr, "SIGSEGV\n");
764	>	fprintf(stderr, "  pc %p\n", fault_instruction);
765	>	fprintf(stderr, "  ea %p\n", fault_address);
766		dump_registers();
767		ppc_cpu->dump_log();
768		enter_mon();
#	Line 932 | Line 826 | void exit_emul_ppc(void)
826		#endif
827
828		delete ppc_cpu;
829	+	ppc_cpu = NULL;
830		}
831
832		#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
#	Line 979 | Line 874 | void emul_ppc(uint32 entry)
874
875		void TriggerInterrupt(void)
876		{
877	+	idle_resume();
878		#if 0
879		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
880		#else
#	Line 988 | Line 884 | void TriggerInterrupt(void)
884		#endif
885		}
886
887	<	void sheepshaver_cpu::handle_interrupt(void)
887	>	void HandleInterrupt(powerpc_registers *r)
888		{
889		#ifdef USE_SDL_VIDEO
890		// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
#	Line 999 | Line 895 | void sheepshaver_cpu::handle_interrupt(v
895		if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
896		return;
897
898	<	// Current interrupt nest level
1003	<	static int interrupt_depth = 0;
1004	<	++interrupt_depth;
898	>	// Update interrupt count
899		#if EMUL_TIME_STATS
900		interrupt_count++;
901		#endif
902
1009	–	// Disable MacOS stack sniffer
1010	–	WriteMacInt32(0x110, 0);
1011	–
903		// Interrupt action depends on current run mode
904		switch (ReadMacInt32(XLM_RUN_MODE)) {
905		case MODE_68K:
906		// 68k emulator active, trigger 68k interrupt level 1
907		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
908	<	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
908	>	r->cr.set(r->cr.get() | tswap32(kernel_data->v[0x674 >> 2]));
909		break;
910
911		#if INTERRUPTS_IN_NATIVE_MODE
912		case MODE_NATIVE:
913		// 68k emulator inactive, in nanokernel?
914	<	if (gpr(1) != KernelDataAddr && interrupt_depth == 1) {
1024	<	interrupt_context ctx(this, "PowerPC mode");
914	>	if (r->gpr[1] != KernelDataAddr) {
915
916		// Prepare for 68k interrupt level 1
917		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
#	Line 1043 | Line 933 | void sheepshaver_cpu::handle_interrupt(v
933		case MODE_EMUL_OP:
934		// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
935		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1046	–	interrupt_context ctx(this, "68k mode");
936		#if EMUL_TIME_STATS
937		const clock_t interrupt_start = clock();
938		#endif
#	Line 1080 | Line 969 | void sheepshaver_cpu::handle_interrupt(v
969		break;
970		#endif
971		}
1083	–
1084	–	// We are done with this interrupt
1085	–	--interrupt_depth;
972		}
973
974		static void get_resource(void);
#	Line 1112 | Line 998 | void sheepshaver_cpu::execute_native_op(
998		case NATIVE_VIDEO_DO_DRIVER_IO:
999		gpr(3) = (int32)(int16)VideoDoDriverIO(gpr(3), gpr(4), gpr(5), gpr(6), gpr(7));
1000		break;
1001	+	case NATIVE_ETHER_AO_GET_HWADDR:
1002	+	AO_get_ethernet_address(gpr(3));
1003	+	break;
1004	+	case NATIVE_ETHER_AO_ADD_MULTI:
1005	+	AO_enable_multicast(gpr(3));
1006	+	break;
1007	+	case NATIVE_ETHER_AO_DEL_MULTI:
1008	+	AO_disable_multicast(gpr(3));
1009	+	break;
1010	+	case NATIVE_ETHER_AO_SEND_PACKET:
1011	+	AO_transmit_packet(gpr(3));
1012	+	break;
1013		case NATIVE_ETHER_IRQ:
1014		EtherIRQ();
1015		break;

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