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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.11 by gbeauche, 2003-10-26T14:16:39Z vs.
Revision 1.20 by gbeauche, 2003-12-03T10:52:49Z

#	Line 28 | Line 28
28		#include "macos_util.h"
29		#include "block-alloc.hpp"
30		#include "sigsegv.h"
31	–	#include "spcflags.h"
31		#include "cpu/ppc/ppc-cpu.hpp"
32		#include "cpu/ppc/ppc-operations.hpp"
33	+	#include "cpu/ppc/ppc-instructions.hpp"
34
35		// Used for NativeOp trampolines
36		#include "video.h"
37		#include "name_registry.h"
38		#include "serial.h"
39	+	#include "ether.h"
40
41		#include <stdio.h>
42
#	Line 47 | Line 48
48		#define DEBUG 0
49		#include "debug.h"
50
51	+	// Emulation time statistics
52	+	#define EMUL_TIME_STATS 1
53	+
54	+	#if EMUL_TIME_STATS
55	+	static clock_t emul_start_time;
56	+	static uint32 interrupt_count = 0;
57	+	static clock_t interrupt_time = 0;
58	+	static uint32 exec68k_count = 0;
59	+	static clock_t exec68k_time = 0;
60	+	static uint32 native_exec_count = 0;
61	+	static clock_t native_exec_time = 0;
62	+	static uint32 macos_exec_count = 0;
63	+	static clock_t macos_exec_time = 0;
64	+	#endif
65	+
66		static void enter_mon(void)
67		{
68		// Start up mon in real-mode
#	Line 74 | Line 90 | static void enter_mon(void)
90		// Pointer to Kernel Data
91		static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
92
93	+	// SIGSEGV handler
94	+	static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
95	+
96	+	// JIT Compiler enabled?
97	+	static inline bool enable_jit_p()
98	+	{
99	+	return PrefsFindBool("jit");
100	+	}
101	+
102
103		/**
104		*              PowerPC emulator glue with special 'sheep' opcodes
105		**/
106
107	<	struct sheepshaver_exec_return { };
107	>	enum {
108	>	PPC_I(SHEEP) = PPC_I(MAX),
109	>	PPC_I(SHEEP_MAX)
110	>	};
111
112		class sheepshaver_cpu
113		: public powerpc_cpu
#	Line 96 | Line 124 | public:
124		uint32 get_cr() const           { return cr().get(); }
125		void set_cr(uint32 v)           { cr().set(v); }
126
99	–	// Execution loop
100	–	void execute(uint32 entry, bool enable_cache = false);
101	–
127		// Execute 68k routine
128		void execute_68k(uint32 entry, M68kRegisters *r);
129
#	Line 115 | Line 140 | public:
140		void interrupt(uint32 entry);
141		void handle_interrupt();
142
118	–	// spcflags for interrupts handling
119	–	static uint32 spcflags;
120	–
143		// Lazy memory allocator (one item at a time)
144		void *operator new(size_t size)
145		{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
#	Line 126 | Line 148 | public:
148		// FIXME: really make surre array allocation fail at link time?
149		void *operator new[](size_t);
150		void operator delete[](void *p);
151	+
152	+	// Make sure the SIGSEGV handler can access CPU registers
153	+	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
154		};
155
131	–	uint32 sheepshaver_cpu::spcflags = 0;
156		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
157
158		sheepshaver_cpu::sheepshaver_cpu()
159	<	: powerpc_cpu()
159	>	: powerpc_cpu(enable_jit_p())
160		{
161		init_decoder();
162		}
#	Line 148 | Line 172 | void sheepshaver_cpu::init_decoder()
172
173		static const instr_info_t sheep_ii_table[] = {
174		{ "sheep",
175	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
175	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
176		NULL,
177	+	PPC_I(SHEEP),
178		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
179		}
180		};
#	Line 189 | Line 214 | void sheepshaver_cpu::execute_sheep(uint
214		break;
215
216		case 1:         // EXEC_RETURN
217	<	throw sheepshaver_exec_return();
217	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
218		break;
219
220		case 2:         // EXEC_NATIVE
#	Line 222 | Line 247 | void sheepshaver_cpu::execute_sheep(uint
247		}
248		}
249
225	–	// Execution loop
226	–	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
227	–	{
228	–	try {
229	–	powerpc_cpu::execute(entry, enable_cache);
230	–	}
231	–	catch (sheepshaver_exec_return const &) {
232	–	// Nothing, simply return
233	–	}
234	–	catch (...) {
235	–	printf("ERROR: execute() received an unknown exception!\n");
236	–	QuitEmulator();
237	–	}
238	–	}
239	–
250		// Handle MacOS interrupt
251		void sheepshaver_cpu::interrupt(uint32 entry)
252		{
253	+	#if EMUL_TIME_STATS
254	+	interrupt_count++;
255	+	const clock_t interrupt_start = clock();
256	+	#endif
257	+
258		#if !MULTICORE_CPU
259		// Save program counters and branch registers
260		uint32 saved_pc = pc();
#	Line 293 | Line 308 | void sheepshaver_cpu::interrupt(uint32 e
308		ctr()= saved_ctr;
309		gpr(1) = saved_sp;
310		#endif
311	+
312	+	#if EMUL_TIME_STATS
313	+	interrupt_time += (clock() - interrupt_start);
314	+	#endif
315		}
316
317		// Execute 68k routine
318		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
319		{
320	+	#if EMUL_TIME_STATS
321	+	exec68k_count++;
322	+	const clock_t exec68k_start = clock();
323	+	#endif
324	+
325		#if SAFE_EXEC_68K
326		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
327		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 380 | Line 404 | void sheepshaver_cpu::execute_68k(uint32
404		lr() = saved_lr;
405		ctr()= saved_ctr;
406		set_cr(saved_cr);
407	+
408	+	#if EMUL_TIME_STATS
409	+	exec68k_time += (clock() - exec68k_start);
410	+	#endif
411		}
412
413		// Call MacOS PPC code
414		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
415		{
416	+	#if EMUL_TIME_STATS
417	+	macos_exec_count++;
418	+	const clock_t macos_exec_start = clock();
419	+	#endif
420	+
421		// Save program counters and branch registers
422		uint32 saved_pc = pc();
423		uint32 saved_lr = lr();
#	Line 423 | Line 456 | uint32 sheepshaver_cpu::execute_macos_co
456		lr() = saved_lr;
457		ctr()= saved_ctr;
458
459	+	#if EMUL_TIME_STATS
460	+	macos_exec_time += (clock() - macos_exec_start);
461	+	#endif
462	+
463		return retval;
464		}
465
#	Line 527 | Line 564 | static sigsegv_return_t sigsegv_handler(
564		if ((addr - ROM_BASE) < ROM_SIZE)
565		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
566
567	<	// Ignore all other faults, if requested
568	<	if (PrefsFindBool("ignoresegv"))
569	<	return SIGSEGV_RETURN_FAILURE;
567	>	// Get program counter of target CPU
568	>	sheepshaver_cpu * const cpu = current_cpu;
569	>	const uint32 pc = cpu->pc();
570	>
571	>	// Fault in Mac ROM or RAM?
572	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
573	>	if (mac_fault) {
574	>
575	>	// "VM settings" during MacOS 8 installation
576	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
577	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
578	>
579	>	// MacOS 8.5 installation
580	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
581	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
582	>
583	>	// MacOS 8 serial drivers on startup
584	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
585	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
586	>
587	>	// MacOS 8.1 serial drivers on startup
588	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
589	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
590	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
591	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
592	>
593	>	// Ignore all other faults, if requested
594	>	if (PrefsFindBool("ignoresegv"))
595	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
596	>	}
597		#else
598		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
599		#endif
#	Line 566 | Line 630 | void init_emul_ppc(void)
630		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
631		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
632		#endif
633	+
634	+	#if EMUL_TIME_STATS
635	+	emul_start_time = clock();
636	+	#endif
637	+	}
638	+
639	+	/*
640	+	*  Deinitialize emulation
641	+	*/
642	+
643	+	void exit_emul_ppc(void)
644	+	{
645	+	#if EMUL_TIME_STATS
646	+	clock_t emul_end_time = clock();
647	+
648	+	printf("### Statistics for SheepShaver emulation parts\n");
649	+	const clock_t emul_time = emul_end_time - emul_start_time;
650	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
651	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
652	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
653	+
654	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
655	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
656	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
657	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
658	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
659	+	} while (0)
660	+
661	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
662	+	PRINT_STATS("NativeOp execution", native_exec);
663	+	PRINT_STATS("MacOS routine execution", macos_exec);
664	+
665	+	#undef PRINT_STATS
666	+	printf("\n");
667	+	#endif
668	+
669	+	delete main_cpu;
670	+	#if MULTICORE_CPU
671	+	delete interrupt_cpu;
672	+	#endif
673		}
674
675		/*
#	Line 579 | Line 683 | void emul_ppc(uint32 entry)
683		current_cpu->start_log();
684		#endif
685		// start emulation loop and enable code translation or caching
686	<	current_cpu->execute(entry, true);
686	>	current_cpu->execute(entry);
687		}
688
689		/*
#	Line 607 | Line 711 | void TriggerInterrupt(void)
711		void sheepshaver_cpu::handle_interrupt(void)
712		{
713		// Do nothing if interrupts are disabled
714	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
714	>	if (*(int32 *)XLM_IRQ_NEST > 0)
715		return;
716
717		// Do nothing if there is no interrupt pending
#	Line 731 | Line 835 | static void r_get_resource(void);
835
836		static void NativeOp(int selector)
837		{
838	+	#if EMUL_TIME_STATS
839	+	native_exec_count++;
840	+	const clock_t native_exec_start = clock();
841	+	#endif
842	+
843		switch (selector) {
844		case NATIVE_PATCH_NAME_REGISTRY:
845		DoPatchNameRegistry();
#	Line 745 | Line 854 | static void NativeOp(int selector)
854		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
855		(void *)GPR(5), GPR(6), GPR(7));
856		break;
857	<	case NATIVE_GET_RESOURCE:
858	<	get_resource();
857	>	#ifdef WORDS_BIGENDIAN
858	>	case NATIVE_ETHER_IRQ:
859	>	EtherIRQ();
860		break;
861	<	case NATIVE_GET_1_RESOURCE:
862	<	get_1_resource();
861	>	case NATIVE_ETHER_INIT:
862	>	GPR(3) = InitStreamModule((void *)GPR(3));
863		break;
864	<	case NATIVE_GET_IND_RESOURCE:
865	<	get_ind_resource();
864	>	case NATIVE_ETHER_TERM:
865	>	TerminateStreamModule();
866		break;
867	<	case NATIVE_GET_1_IND_RESOURCE:
868	<	get_1_ind_resource();
867	>	case NATIVE_ETHER_OPEN:
868	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
869	>	break;
870	>	case NATIVE_ETHER_CLOSE:
871	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
872	>	break;
873	>	case NATIVE_ETHER_WPUT:
874	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
875		break;
876	<	case NATIVE_R_GET_RESOURCE:
877	<	r_get_resource();
876	>	case NATIVE_ETHER_RSRV:
877	>	GPR(3) = ether_rsrv((queue_t *)GPR(3));
878		break;
879	+	#else
880	+	case NATIVE_ETHER_INIT:
881	+	// FIXME: needs more complicated thunks
882	+	GPR(3) = false;
883	+	break;
884	+	#endif
885		case NATIVE_SERIAL_NOTHING:
886		case NATIVE_SERIAL_OPEN:
887		case NATIVE_SERIAL_PRIME_IN:
#	Line 780 | Line 902 | static void NativeOp(int selector)
902		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
903		break;
904		}
905	+	case NATIVE_GET_RESOURCE:
906	+	case NATIVE_GET_1_RESOURCE:
907	+	case NATIVE_GET_IND_RESOURCE:
908	+	case NATIVE_GET_1_IND_RESOURCE:
909	+	case NATIVE_R_GET_RESOURCE: {
910	+	typedef void (*GetResourceCallback)(void);
911	+	static const GetResourceCallback get_resource_callbacks[] = {
912	+	get_resource,
913	+	get_1_resource,
914	+	get_ind_resource,
915	+	get_1_ind_resource,
916	+	r_get_resource
917	+	};
918	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
919	+	break;
920	+	}
921		case NATIVE_DISABLE_INTERRUPT:
922		DisableInterrupt();
923		break;
#	Line 794 | Line 932 | static void NativeOp(int selector)
932		QuitEmulator();
933		break;
934		}
935	+
936	+	#if EMUL_TIME_STATS
937	+	native_exec_time += (clock() - native_exec_start);
938	+	#endif
939		}
940
941		/*

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