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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 1.19 by gbeauche, 2003-11-30T17:21:52Z

#	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
100	–	// Execution loop
101	–	void execute(uint32 pc);
102	–
121		// Execute 68k routine
122		void execute_68k(uint32 entry, M68kRegisters *r);
123
#	Line 114 | Line 132 | public:
132
133		// Handle MacOS interrupt
134		void interrupt(uint32 entry);
135	<
118	<	// spcflags for interrupts handling
119	<	static uint32 spcflags;
135	>	void handle_interrupt();
136
137		// Lazy memory allocator (one item at a time)
138		void *operator new(size_t size)
#	Line 126 | Line 142 | public:
142		// FIXME: really make surre array allocation fail at link time?
143		void *operator new[](size_t);
144		void operator delete[](void *p);
145	+
146	+	// Make sure the SIGSEGV handler can access CPU registers
147	+	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
148		};
149
131	–	uint32 sheepshaver_cpu::spcflags = 0;
150		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
151
152	+	sheepshaver_cpu::sheepshaver_cpu()
153	+	: powerpc_cpu()
154	+	{
155	+	init_decoder();
156	+	}
157	+
158		void sheepshaver_cpu::init_decoder()
159		{
160		#ifndef PPC_NO_STATIC_II_INDEX_TABLE
#	Line 142 | Line 166 | void sheepshaver_cpu::init_decoder()
166
167		static const instr_info_t sheep_ii_table[] = {
168		{ "sheep",
169	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
169	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
170		NULL,
171	+	PPC_I(SHEEP),
172		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
173		}
174		};
#	Line 183 | Line 208 | void sheepshaver_cpu::execute_sheep(uint
208		break;
209
210		case 1:         // EXEC_RETURN
211	<	throw sheepshaver_exec_return();
211	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
212		break;
213
214		case 2:         // EXEC_NATIVE
#	Line 216 | Line 241 | void sheepshaver_cpu::execute_sheep(uint
241		}
242		}
243
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	–
245	–	// Execution loop
246	–	void sheepshaver_cpu::execute(uint32 entry)
247	–	{
248	–	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	–	}
259	–	}
260	–
244		// Handle MacOS interrupt
245		void sheepshaver_cpu::interrupt(uint32 entry)
246		{
247	+	#if EMUL_TIME_STATS
248	+	interrupt_count++;
249	+	const clock_t interrupt_start = clock();
250	+	#endif
251	+
252		#if !MULTICORE_CPU
253		// Save program counters and branch registers
254		uint32 saved_pc = pc();
#	Line 314 | Line 302 | void sheepshaver_cpu::interrupt(uint32 e
302		ctr()= saved_ctr;
303		gpr(1) = saved_sp;
304		#endif
305	+
306	+	#if EMUL_TIME_STATS
307	+	interrupt_time += (clock() - interrupt_start);
308	+	#endif
309		}
310
311		// Execute 68k routine
312		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
313		{
314	+	#if EMUL_TIME_STATS
315	+	exec68k_count++;
316	+	const clock_t exec68k_start = clock();
317	+	#endif
318	+
319		#if SAFE_EXEC_68K
320		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
321		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 401 | Line 398 | void sheepshaver_cpu::execute_68k(uint32
398		lr() = saved_lr;
399		ctr()= saved_ctr;
400		set_cr(saved_cr);
401	+
402	+	#if EMUL_TIME_STATS
403	+	exec68k_time += (clock() - exec68k_start);
404	+	#endif
405		}
406
407		// Call MacOS PPC code
408		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
409		{
410	+	#if EMUL_TIME_STATS
411	+	macos_exec_count++;
412	+	const clock_t macos_exec_start = clock();
413	+	#endif
414	+
415		// Save program counters and branch registers
416		uint32 saved_pc = pc();
417		uint32 saved_lr = lr();
#	Line 444 | Line 450 | uint32 sheepshaver_cpu::execute_macos_co
450		lr() = saved_lr;
451		ctr()= saved_ctr;
452
453	+	#if EMUL_TIME_STATS
454	+	macos_exec_time += (clock() - macos_exec_start);
455	+	#endif
456	+
457		return retval;
458		}
459
#	Line 548 | Line 558 | static sigsegv_return_t sigsegv_handler(
558		if ((addr - ROM_BASE) < ROM_SIZE)
559		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
560
561	<	// Ignore all other faults, if requested
562	<	if (PrefsFindBool("ignoresegv"))
563	<	return SIGSEGV_RETURN_FAILURE;
561	>	// Get program counter of target CPU
562	>	sheepshaver_cpu * const cpu = current_cpu;
563	>	const uint32 pc = cpu->pc();
564	>
565	>	// Fault in Mac ROM or RAM?
566	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
567	>	if (mac_fault) {
568	>
569	>	// "VM settings" during MacOS 8 installation
570	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
571	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
572	>
573	>	// MacOS 8.5 installation
574	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
575	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
576	>
577	>	// MacOS 8 serial drivers on startup
578	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
579	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
580	>
581	>	// MacOS 8.1 serial drivers on startup
582	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
583	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
584	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
585	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
586	>
587	>	// Ignore all other faults, if requested
588	>	if (PrefsFindBool("ignoresegv"))
589	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
590	>	}
591		#else
592		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
593		#endif
#	Line 587 | Line 624 | void init_emul_ppc(void)
624		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
625		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
626		#endif
627	+
628	+	#if EMUL_TIME_STATS
629	+	emul_start_time = clock();
630	+	#endif
631	+	}
632	+
633	+	/*
634	+	*  Deinitialize emulation
635	+	*/
636	+
637	+	void exit_emul_ppc(void)
638	+	{
639	+	#if EMUL_TIME_STATS
640	+	clock_t emul_end_time = clock();
641	+
642	+	printf("### Statistics for SheepShaver emulation parts\n");
643	+	const clock_t emul_time = emul_end_time - emul_start_time;
644	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
645	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
646	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
647	+
648	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
649	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
650	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
651	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
652	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
653	+	} while (0)
654	+
655	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
656	+	PRINT_STATS("NativeOp execution", native_exec);
657	+	PRINT_STATS("MacOS routine execution", macos_exec);
658	+
659	+	#undef PRINT_STATS
660	+	printf("\n");
661	+	#endif
662	+
663	+	delete main_cpu;
664	+	#if MULTICORE_CPU
665	+	delete interrupt_cpu;
666	+	#endif
667		}
668
669		/*
#	Line 596 | Line 673 | void init_emul_ppc(void)
673		void emul_ppc(uint32 entry)
674		{
675		current_cpu = main_cpu;
676	+	#if DEBUG
677		current_cpu->start_log();
678	+	#endif
679	+	// start emulation loop and enable code translation or caching
680		current_cpu->execute(entry);
681		}
682
#	Line 604 | Line 684 | void emul_ppc(uint32 entry)
684		*  Handle PowerPC interrupt
685		*/
686
687	<	// Atomic operations
688	<	extern int atomic_add(int *var, int v);
689	<	extern int atomic_and(int *var, int v);
690	<	extern int atomic_or(int *var, int v);
691	<
692	<	#if !ASYNC_IRQ
687	>	#if ASYNC_IRQ
688	>	void HandleInterrupt(void)
689	>	{
690	>	main_cpu->handle_interrupt();
691	>	}
692	>	#else
693		void TriggerInterrupt(void)
694		{
695		#if 0
696		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
697		#else
698	<	SPCFLAGS_SET( SPCFLAG_INT );
698	>	// Trigger interrupt to main cpu only
699	>	if (main_cpu)
700	>	main_cpu->trigger_interrupt();
701		#endif
702		}
703		#endif
704
705	<	void HandleInterrupt(void)
705	>	void sheepshaver_cpu::handle_interrupt(void)
706		{
707		// Do nothing if interrupts are disabled
708	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
708	>	if (*(int32 *)XLM_IRQ_NEST > 0)
709		return;
710
711		// Do nothing if there is no interrupt pending
#	Line 639 | Line 721 | void HandleInterrupt(void)
721		// 68k emulator active, trigger 68k interrupt level 1
722		assert(current_cpu == main_cpu);
723		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
724	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
724	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
725		break;
726
727		#if INTERRUPTS_IN_NATIVE_MODE
728		case MODE_NATIVE:
729		// 68k emulator inactive, in nanokernel?
730		assert(current_cpu == main_cpu);
731	<	if (main_cpu->gpr(1) != KernelDataAddr) {
731	>	if (gpr(1) != KernelDataAddr) {
732		// Prepare for 68k interrupt level 1
733		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
734		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 747 | Line 829 | static void r_get_resource(void);
829
830		static void NativeOp(int selector)
831		{
832	+	#if EMUL_TIME_STATS
833	+	native_exec_count++;
834	+	const clock_t native_exec_start = clock();
835	+	#endif
836	+
837		switch (selector) {
838		case NATIVE_PATCH_NAME_REGISTRY:
839		DoPatchNameRegistry();
#	Line 761 | Line 848 | static void NativeOp(int selector)
848		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
849		(void *)GPR(5), GPR(6), GPR(7));
850		break;
851	<	case NATIVE_GET_RESOURCE:
852	<	get_resource();
851	>	#ifdef WORDS_BIGENDIAN
852	>	case NATIVE_ETHER_IRQ:
853	>	EtherIRQ();
854		break;
855	<	case NATIVE_GET_1_RESOURCE:
856	<	get_1_resource();
855	>	case NATIVE_ETHER_INIT:
856	>	GPR(3) = InitStreamModule((void *)GPR(3));
857		break;
858	<	case NATIVE_GET_IND_RESOURCE:
859	<	get_ind_resource();
858	>	case NATIVE_ETHER_TERM:
859	>	TerminateStreamModule();
860		break;
861	<	case NATIVE_GET_1_IND_RESOURCE:
862	<	get_1_ind_resource();
861	>	case NATIVE_ETHER_OPEN:
862	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
863	>	break;
864	>	case NATIVE_ETHER_CLOSE:
865	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
866		break;
867	<	case NATIVE_R_GET_RESOURCE:
868	<	r_get_resource();
867	>	case NATIVE_ETHER_WPUT:
868	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
869		break;
870	+	case NATIVE_ETHER_RSRV:
871	+	GPR(3) = ether_rsrv((queue_t *)GPR(3));
872	+	break;
873	+	#else
874	+	case NATIVE_ETHER_INIT:
875	+	// FIXME: needs more complicated thunks
876	+	GPR(3) = false;
877	+	break;
878	+	#endif
879		case NATIVE_SERIAL_NOTHING:
880		case NATIVE_SERIAL_OPEN:
881		case NATIVE_SERIAL_PRIME_IN:
#	Line 796 | Line 896 | static void NativeOp(int selector)
896		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
897		break;
898		}
899	+	case NATIVE_GET_RESOURCE:
900	+	case NATIVE_GET_1_RESOURCE:
901	+	case NATIVE_GET_IND_RESOURCE:
902	+	case NATIVE_GET_1_IND_RESOURCE:
903	+	case NATIVE_R_GET_RESOURCE: {
904	+	typedef void (*GetResourceCallback)(void);
905	+	static const GetResourceCallback get_resource_callbacks[] = {
906	+	get_resource,
907	+	get_1_resource,
908	+	get_ind_resource,
909	+	get_1_ind_resource,
910	+	r_get_resource
911	+	};
912	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
913	+	break;
914	+	}
915		case NATIVE_DISABLE_INTERRUPT:
916		DisableInterrupt();
917		break;
#	Line 810 | Line 926 | static void NativeOp(int selector)
926		QuitEmulator();
927		break;
928		}
929	+
930	+	#if EMUL_TIME_STATS
931	+	native_exec_time += (clock() - native_exec_start);
932	+	#endif
933		}
934
935		/*
#	Line 902 | Line 1022 | uint32 call_macos7(uint32 tvect, uint32
1022		}
1023
1024		/*
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	–	/*
1025		*  Resource Manager thunks
1026		*/
1027

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