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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.8 by gbeauche, 2003-10-19T21:37:43Z vs.
Revision 1.18 by gbeauche, 2003-11-24T23:45:41Z

#	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 44 | Line 45
45		#include "mon_disass.h"
46		#endif
47
48	<	#define DEBUG 1
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 57 | Line 73 | static void enter_mon(void)
73		}
74
75		// Enable multicore (main/interrupts) cpu emulation?
76	<	#define MULTICORE_CPU 0
76	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
77
78		// Enable Execute68k() safety checks?
79		#define SAFE_EXEC_68K 1
#	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
97		/**
98		*              PowerPC emulator glue with special 'sheep' opcodes
99		**/
100
101	<	struct sheepshaver_exec_return { };
101	>	enum {
102	>	PPC_I(SHEEP) = PPC_I(MAX),
103	>	PPC_I(SHEEP_MAX)
104	>	};
105
106		class sheepshaver_cpu
107		: public powerpc_cpu
#	Line 89 | Line 111 | class sheepshaver_cpu
111
112		public:
113
114	<	sheepshaver_cpu()
115	<	: powerpc_cpu()
94	<	{ init_decoder(); }
114	>	// Constructor
115	>	sheepshaver_cpu();
116
117		// Condition Register accessors
118		uint32 get_cr() const           { return cr().get(); }
119		void set_cr(uint32 v)           { cr().set(v); }
120
121		// Execution loop
122	<	void execute(uint32 pc);
122	>	void execute(uint32 entry, bool enable_cache = false);
123
124		// Execute 68k routine
125		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 114 | Line 135 | public:
135
136		// Handle MacOS interrupt
137		void interrupt(uint32 entry);
138	<
118	<	// spcflags for interrupts handling
119	<	static uint32 spcflags;
138	>	void handle_interrupt();
139
140		// Lazy memory allocator (one item at a time)
141		void *operator new(size_t size)
#	Line 126 | Line 145 | public:
145		// FIXME: really make surre array allocation fail at link time?
146		void *operator new[](size_t);
147		void operator delete[](void *p);
148	+
149	+	// Make sure the SIGSEGV handler can access CPU registers
150	+	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
151		};
152
131	–	uint32 sheepshaver_cpu::spcflags = 0;
153		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
154
155	+	sheepshaver_cpu::sheepshaver_cpu()
156	+	: powerpc_cpu()
157	+	{
158	+	init_decoder();
159	+	}
160	+
161		void sheepshaver_cpu::init_decoder()
162		{
163		#ifndef PPC_NO_STATIC_II_INDEX_TABLE
#	Line 142 | Line 169 | void sheepshaver_cpu::init_decoder()
169
170		static const instr_info_t sheep_ii_table[] = {
171		{ "sheep",
172	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
172	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
173		NULL,
174	+	PPC_I(SHEEP),
175		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
176		}
177		};
#	Line 183 | Line 211 | void sheepshaver_cpu::execute_sheep(uint
211		break;
212
213		case 1:         // EXEC_RETURN
214	<	throw sheepshaver_exec_return();
214	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
215		break;
216
217		case 2:         // EXEC_NATIVE
#	Line 216 | Line 244 | void sheepshaver_cpu::execute_sheep(uint
244		}
245		}
246
219	–	// Checks for pending interrupts
220	–	struct execute_nothing {
221	–	static inline void execute(powerpc_cpu *) { }
222	–	};
223	–
224	–	struct execute_spcflags_check {
225	–	static inline void execute(powerpc_cpu *cpu) {
226	–	#if !ASYNC_IRQ
227	–	if (SPCFLAGS_TEST(SPCFLAG_ALL_BUT_EXEC_RETURN)) {
228	–	if (SPCFLAGS_TEST( SPCFLAG_ENTER_MON )) {
229	–	SPCFLAGS_CLEAR( SPCFLAG_ENTER_MON );
230	–	enter_mon();
231	–	}
232	–	if (SPCFLAGS_TEST( SPCFLAG_DOINT )) {
233	–	SPCFLAGS_CLEAR( SPCFLAG_DOINT );
234	–	HandleInterrupt();
235	–	}
236	–	if (SPCFLAGS_TEST( SPCFLAG_INT )) {
237	–	SPCFLAGS_CLEAR( SPCFLAG_INT );
238	–	SPCFLAGS_SET( SPCFLAG_DOINT );
239	–	}
240	–	}
241	–	#endif
242	–	}
243	–	};
244	–
247		// Execution loop
248	<	void sheepshaver_cpu::execute(uint32 entry)
248	>	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
249		{
250	<	try {
249	<	pc() = entry;
250	<	powerpc_cpu::do_execute<execute_nothing, execute_spcflags_check>();
251	<	}
252	<	catch (sheepshaver_exec_return const &) {
253	<	// Nothing, simply return
254	<	}
255	<	catch (...) {
256	<	printf("ERROR: execute() received an unknown exception!\n");
257	<	QuitEmulator();
258	<	}
250	>	powerpc_cpu::execute(entry, enable_cache);
251		}
252
253		// Handle MacOS interrupt
254		void sheepshaver_cpu::interrupt(uint32 entry)
255		{
256	+	#if EMUL_TIME_STATS
257	+	interrupt_count++;
258	+	const clock_t interrupt_start = clock();
259	+	#endif
260	+
261		#if !MULTICORE_CPU
262		// Save program counters and branch registers
263		uint32 saved_pc = pc();
#	Line 314 | Line 311 | void sheepshaver_cpu::interrupt(uint32 e
311		ctr()= saved_ctr;
312		gpr(1) = saved_sp;
313		#endif
314	+
315	+	#if EMUL_TIME_STATS
316	+	interrupt_time += (clock() - interrupt_start);
317	+	#endif
318		}
319
320		// Execute 68k routine
321		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
322		{
323	+	#if EMUL_TIME_STATS
324	+	exec68k_count++;
325	+	const clock_t exec68k_start = clock();
326	+	#endif
327	+
328		#if SAFE_EXEC_68K
329		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
330		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 401 | Line 407 | void sheepshaver_cpu::execute_68k(uint32
407		lr() = saved_lr;
408		ctr()= saved_ctr;
409		set_cr(saved_cr);
410	+
411	+	#if EMUL_TIME_STATS
412	+	exec68k_time += (clock() - exec68k_start);
413	+	#endif
414		}
415
416		// Call MacOS PPC code
417		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
418		{
419	+	#if EMUL_TIME_STATS
420	+	macos_exec_count++;
421	+	const clock_t macos_exec_start = clock();
422	+	#endif
423	+
424		// Save program counters and branch registers
425		uint32 saved_pc = pc();
426		uint32 saved_lr = lr();
#	Line 444 | Line 459 | uint32 sheepshaver_cpu::execute_macos_co
459		lr() = saved_lr;
460		ctr()= saved_ctr;
461
462	+	#if EMUL_TIME_STATS
463	+	macos_exec_time += (clock() - macos_exec_start);
464	+	#endif
465	+
466		return retval;
467		}
468
#	Line 548 | Line 567 | static sigsegv_return_t sigsegv_handler(
567		if ((addr - ROM_BASE) < ROM_SIZE)
568		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
569
570	<	// Ignore all other faults, if requested
571	<	if (PrefsFindBool("ignoresegv"))
572	<	return SIGSEGV_RETURN_FAILURE;
570	>	// Get program counter of target CPU
571	>	sheepshaver_cpu * const cpu = current_cpu;
572	>	const uint32 pc = cpu->pc();
573	>
574	>	// Fault in Mac ROM or RAM?
575	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
576	>	if (mac_fault) {
577	>
578	>	// "VM settings" during MacOS 8 installation
579	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
580	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
581	>
582	>	// MacOS 8.5 installation
583	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
584	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
585	>
586	>	// MacOS 8 serial drivers on startup
587	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
588	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
589	>
590	>	// MacOS 8.1 serial drivers on startup
591	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
592	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
593	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
594	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
595	>
596	>	// Ignore all other faults, if requested
597	>	if (PrefsFindBool("ignoresegv"))
598	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
599	>	}
600		#else
601		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
602		#endif
#	Line 587 | Line 633 | void init_emul_ppc(void)
633		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
634		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
635		#endif
636	+
637	+	#if EMUL_TIME_STATS
638	+	emul_start_time = clock();
639	+	#endif
640	+	}
641	+
642	+	/*
643	+	*  Deinitialize emulation
644	+	*/
645	+
646	+	void exit_emul_ppc(void)
647	+	{
648	+	#if EMUL_TIME_STATS
649	+	clock_t emul_end_time = clock();
650	+
651	+	printf("### Statistics for SheepShaver emulation parts\n");
652	+	const clock_t emul_time = emul_end_time - emul_start_time;
653	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
654	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
655	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
656	+
657	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
658	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
659	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
660	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
661	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
662	+	} while (0)
663	+
664	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
665	+	PRINT_STATS("NativeOp execution", native_exec);
666	+	PRINT_STATS("MacOS routine execution", macos_exec);
667	+
668	+	#undef PRINT_STATS
669	+	printf("\n");
670	+	#endif
671	+
672	+	delete main_cpu;
673	+	#if MULTICORE_CPU
674	+	delete interrupt_cpu;
675	+	#endif
676		}
677
678		/*
#	Line 596 | Line 682 | void init_emul_ppc(void)
682		void emul_ppc(uint32 entry)
683		{
684		current_cpu = main_cpu;
685	+	#if DEBUG
686		current_cpu->start_log();
687	<	current_cpu->execute(entry);
687	>	#endif
688	>	// start emulation loop and enable code translation or caching
689	>	current_cpu->execute(entry, true);
690		}
691
692		/*
693		*  Handle PowerPC interrupt
694		*/
695
696	<	// Atomic operations
697	<	extern int atomic_add(int *var, int v);
698	<	extern int atomic_and(int *var, int v);
699	<	extern int atomic_or(int *var, int v);
700	<
701	<	#if !ASYNC_IRQ
696	>	#if ASYNC_IRQ
697	>	void HandleInterrupt(void)
698	>	{
699	>	main_cpu->handle_interrupt();
700	>	}
701	>	#else
702		void TriggerInterrupt(void)
703		{
704		#if 0
705		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
706		#else
707	<	SPCFLAGS_SET( SPCFLAG_INT );
707	>	// Trigger interrupt to main cpu only
708	>	if (main_cpu)
709	>	main_cpu->trigger_interrupt();
710		#endif
711		}
712		#endif
713
714	<	void HandleInterrupt(void)
714	>	void sheepshaver_cpu::handle_interrupt(void)
715		{
716		// Do nothing if interrupts are disabled
717	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
717	>	if (*(int32 *)XLM_IRQ_NEST > 0)
718		return;
719
720		// Do nothing if there is no interrupt pending
#	Line 639 | Line 730 | void HandleInterrupt(void)
730		// 68k emulator active, trigger 68k interrupt level 1
731		assert(current_cpu == main_cpu);
732		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
733	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
733	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
734		break;
735
736		#if INTERRUPTS_IN_NATIVE_MODE
737		case MODE_NATIVE:
738		// 68k emulator inactive, in nanokernel?
739		assert(current_cpu == main_cpu);
740	<	if (main_cpu->gpr(1) != KernelDataAddr) {
740	>	if (gpr(1) != KernelDataAddr) {
741		// Prepare for 68k interrupt level 1
742		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
743		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 747 | Line 838 | static void r_get_resource(void);
838
839		static void NativeOp(int selector)
840		{
841	+	#if EMUL_TIME_STATS
842	+	native_exec_count++;
843	+	const clock_t native_exec_start = clock();
844	+	#endif
845	+
846		switch (selector) {
847		case NATIVE_PATCH_NAME_REGISTRY:
848		DoPatchNameRegistry();
#	Line 761 | Line 857 | static void NativeOp(int selector)
857		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
858		(void *)GPR(5), GPR(6), GPR(7));
859		break;
860	<	case NATIVE_GET_RESOURCE:
861	<	get_resource();
860	>	#ifdef WORDS_BIGENDIAN
861	>	case NATIVE_ETHER_IRQ:
862	>	EtherIRQ();
863		break;
864	<	case NATIVE_GET_1_RESOURCE:
865	<	get_1_resource();
864	>	case NATIVE_ETHER_INIT:
865	>	GPR(3) = InitStreamModule((void *)GPR(3));
866		break;
867	<	case NATIVE_GET_IND_RESOURCE:
868	<	get_ind_resource();
867	>	case NATIVE_ETHER_TERM:
868	>	TerminateStreamModule();
869		break;
870	<	case NATIVE_GET_1_IND_RESOURCE:
871	<	get_1_ind_resource();
870	>	case NATIVE_ETHER_OPEN:
871	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
872	>	break;
873	>	case NATIVE_ETHER_CLOSE:
874	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
875	>	break;
876	>	case NATIVE_ETHER_WPUT:
877	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
878		break;
879	<	case NATIVE_R_GET_RESOURCE:
880	<	r_get_resource();
879	>	case NATIVE_ETHER_RSRV:
880	>	GPR(3) = ether_rsrv((queue_t *)GPR(3));
881		break;
882	+	#else
883	+	case NATIVE_ETHER_INIT:
884	+	// FIXME: needs more complicated thunks
885	+	GPR(3) = false;
886	+	break;
887	+	#endif
888		case NATIVE_SERIAL_NOTHING:
889		case NATIVE_SERIAL_OPEN:
890		case NATIVE_SERIAL_PRIME_IN:
#	Line 796 | Line 905 | static void NativeOp(int selector)
905		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
906		break;
907		}
908	+	case NATIVE_GET_RESOURCE:
909	+	case NATIVE_GET_1_RESOURCE:
910	+	case NATIVE_GET_IND_RESOURCE:
911	+	case NATIVE_GET_1_IND_RESOURCE:
912	+	case NATIVE_R_GET_RESOURCE: {
913	+	typedef void (*GetResourceCallback)(void);
914	+	static const GetResourceCallback get_resource_callbacks[] = {
915	+	get_resource,
916	+	get_1_resource,
917	+	get_ind_resource,
918	+	get_1_ind_resource,
919	+	r_get_resource
920	+	};
921	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
922	+	break;
923	+	}
924		case NATIVE_DISABLE_INTERRUPT:
925		DisableInterrupt();
926		break;
#	Line 810 | Line 935 | static void NativeOp(int selector)
935		QuitEmulator();
936		break;
937		}
938	+
939	+	#if EMUL_TIME_STATS
940	+	native_exec_time += (clock() - native_exec_start);
941	+	#endif
942		}
943
944		/*
#	Line 902 | Line 1031 | uint32 call_macos7(uint32 tvect, uint32
1031		}
1032
1033		/*
905	–	*  Atomic operations
906	–	*/
907	–
908	–	int atomic_add(int *var, int v)
909	–	{
910	–	int ret = *var;
911	–	*var += v;
912	–	return ret;
913	–	}
914	–
915	–	int atomic_and(int *var, int v)
916	–	{
917	–	int ret = *var;
918	–	*var &= v;
919	–	return ret;
920	–	}
921	–
922	–	int atomic_or(int *var, int v)
923	–	{
924	–	int ret = *var;
925	–	*var |= v;
926	–	return ret;
927	–	}
928	–
929	–	/*
1034		*  Resource Manager thunks
1035		*/
1036

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