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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.7 by gbeauche, 2003-10-12T05:44:15Z vs.
Revision 1.15 by gbeauche, 2003-11-04T20:48:29Z

#	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
#	Line 44 | Line 43
43		#include "mon_disass.h"
44		#endif
45
46	<	#define DEBUG 1
46	>	#define DEBUG 0
47		#include "debug.h"
48
49	+	// Emulation time statistics
50	+	#define EMUL_TIME_STATS 1
51	+
52	+	#if EMUL_TIME_STATS
53	+	static clock_t emul_start_time;
54	+	static uint32 interrupt_count = 0;
55	+	static clock_t interrupt_time = 0;
56	+	static uint32 exec68k_count = 0;
57	+	static clock_t exec68k_time = 0;
58	+	static uint32 native_exec_count = 0;
59	+	static clock_t native_exec_time = 0;
60	+	static uint32 macos_exec_count = 0;
61	+	static clock_t macos_exec_time = 0;
62	+	#endif
63	+
64		static void enter_mon(void)
65		{
66		// Start up mon in real-mode
#	Line 57 | Line 71 | static void enter_mon(void)
71		}
72
73		// Enable multicore (main/interrupts) cpu emulation?
74	<	#define MULTICORE_CPU 0
74	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
75
76		// Enable Execute68k() safety checks?
77		#define SAFE_EXEC_68K 1
#	Line 79 | Line 93 | static KernelData * const kernel_data =
93		*              PowerPC emulator glue with special 'sheep' opcodes
94		**/
95
82	–	struct sheepshaver_exec_return { };
83	–
96		class sheepshaver_cpu
97		: public powerpc_cpu
98		{
#	Line 89 | Line 101 | class sheepshaver_cpu
101
102		public:
103
104	<	sheepshaver_cpu()
105	<	: powerpc_cpu()
94	<	{ init_decoder(); }
104	>	// Constructor
105	>	sheepshaver_cpu();
106
107		// Condition Register accessors
108		uint32 get_cr() const           { return cr().get(); }
109		void set_cr(uint32 v)           { cr().set(v); }
110
111		// Execution loop
112	<	void execute(uint32 pc);
112	>	void execute(uint32 entry, bool enable_cache = false);
113
114		// Execute 68k routine
115		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 114 | Line 125 | public:
125
126		// Handle MacOS interrupt
127		void interrupt(uint32 entry);
128	<
118	<	// spcflags for interrupts handling
119	<	static uint32 spcflags;
128	>	void handle_interrupt();
129
130		// Lazy memory allocator (one item at a time)
131		void *operator new(size_t size)
#	Line 128 | Line 137 | public:
137		void operator delete[](void *p);
138		};
139
131	–	uint32 sheepshaver_cpu::spcflags = 0;
140		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
141
142	+	sheepshaver_cpu::sheepshaver_cpu()
143	+	: powerpc_cpu()
144	+	{
145	+	init_decoder();
146	+	}
147	+
148		void sheepshaver_cpu::init_decoder()
149		{
150		#ifndef PPC_NO_STATIC_II_INDEX_TABLE
#	Line 142 | Line 156 | void sheepshaver_cpu::init_decoder()
156
157		static const instr_info_t sheep_ii_table[] = {
158		{ "sheep",
159	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
159	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
160		NULL,
161		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
162		}
#	Line 181 | Line 195 | void sheepshaver_cpu::execute_sheep(uint
195		case 0:         // EMUL_RETURN
196		QuitEmulator();
197		break;
198	<
198	>
199		case 1:         // EXEC_RETURN
200	<	throw sheepshaver_exec_return();
200	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
201		break;
202
203		case 2:         // EXEC_NATIVE
#	Line 216 | Line 230 | void sheepshaver_cpu::execute_sheep(uint
230		}
231		}
232
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	–
233		// Execution loop
234	<	void sheepshaver_cpu::execute(uint32 entry)
234	>	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
235		{
236	<	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	<	}
236	>	powerpc_cpu::execute(entry, enable_cache);
237		}
238
239		// Handle MacOS interrupt
240		void sheepshaver_cpu::interrupt(uint32 entry)
241		{
242	+	#if EMUL_TIME_STATS
243	+	interrupt_count++;
244	+	const clock_t interrupt_start = clock();
245	+	#endif
246	+
247		#if !MULTICORE_CPU
248		// Save program counters and branch registers
249		uint32 saved_pc = pc();
#	Line 294 | Line 277 | void sheepshaver_cpu::interrupt(uint32 e
277		gpr(8)  = 0;
278		gpr(10) = (uint32)trampoline;
279		gpr(12) = (uint32)trampoline;
280	<	gpr(13) = cr().get();
280	>	gpr(13) = get_cr();
281
282		// rlwimi. r7,r7,8,0,0
283		uint32 result = op_ppc_rlwimi::apply(gpr(7), 8, 0x80000000, gpr(7));
#	Line 302 | Line 285 | void sheepshaver_cpu::interrupt(uint32 e
285		gpr(7) = result;
286
287		gpr(11) = 0xf072; // MSR (SRR1)
288	<	cr().set((gpr(11) & 0x0fff0000) | (cr().get() & ~0x0fff0000));
288	>	cr().set((gpr(11) & 0x0fff0000) | (get_cr() & ~0x0fff0000));
289
290		// Enter nanokernel
291		execute(entry);
#	Line 314 | Line 297 | void sheepshaver_cpu::interrupt(uint32 e
297		ctr()= saved_ctr;
298		gpr(1) = saved_sp;
299		#endif
300	+
301	+	#if EMUL_TIME_STATS
302	+	interrupt_time += (clock() - interrupt_start);
303	+	#endif
304		}
305
306		// Execute 68k routine
307		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
308		{
309	+	#if EMUL_TIME_STATS
310	+	exec68k_count++;
311	+	const clock_t exec68k_start = clock();
312	+	#endif
313	+
314		#if SAFE_EXEC_68K
315		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
316		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 328 | Line 320 | void sheepshaver_cpu::execute_68k(uint32
320		uint32 saved_pc = pc();
321		uint32 saved_lr = lr();
322		uint32 saved_ctr= ctr();
323	+	uint32 saved_cr = get_cr();
324
325		// Create MacOS stack frame
326		// FIXME: make sure MacOS doesn't expect PPC registers to live on top
#	Line 399 | Line 392 | void sheepshaver_cpu::execute_68k(uint32
392		pc() = saved_pc;
393		lr() = saved_lr;
394		ctr()= saved_ctr;
395	+	set_cr(saved_cr);
396	+
397	+	#if EMUL_TIME_STATS
398	+	exec68k_time += (clock() - exec68k_start);
399	+	#endif
400		}
401
402		// Call MacOS PPC code
403		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
404		{
405	+	#if EMUL_TIME_STATS
406	+	macos_exec_count++;
407	+	const clock_t macos_exec_start = clock();
408	+	#endif
409	+
410		// Save program counters and branch registers
411		uint32 saved_pc = pc();
412		uint32 saved_lr = lr();
#	Line 442 | Line 445 | uint32 sheepshaver_cpu::execute_macos_co
445		lr() = saved_lr;
446		ctr()= saved_ctr;
447
448	+	#if EMUL_TIME_STATS
449	+	macos_exec_time += (clock() - macos_exec_start);
450	+	#endif
451	+
452		return retval;
453		}
454
#	Line 585 | Line 592 | void init_emul_ppc(void)
592		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
593		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
594		#endif
595	+
596	+	#if EMUL_TIME_STATS
597	+	emul_start_time = clock();
598	+	#endif
599	+	}
600	+
601	+	/*
602	+	*  Deinitialize emulation
603	+	*/
604	+
605	+	void exit_emul_ppc(void)
606	+	{
607	+	#if EMUL_TIME_STATS
608	+	clock_t emul_end_time = clock();
609	+
610	+	printf("### Statistics for SheepShaver emulation parts\n");
611	+	const clock_t emul_time = emul_end_time - emul_start_time;
612	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
613	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
614	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
615	+
616	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
617	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
618	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
619	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
620	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
621	+	} while (0)
622	+
623	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
624	+	PRINT_STATS("NativeOp execution", native_exec);
625	+	PRINT_STATS("MacOS routine execution", macos_exec);
626	+
627	+	#undef PRINT_STATS
628	+	printf("\n");
629	+	#endif
630	+
631	+	delete main_cpu;
632	+	#if MULTICORE_CPU
633	+	delete interrupt_cpu;
634	+	#endif
635		}
636
637		/*
#	Line 594 | Line 641 | void init_emul_ppc(void)
641		void emul_ppc(uint32 entry)
642		{
643		current_cpu = main_cpu;
644	+	#if DEBUG
645		current_cpu->start_log();
646	<	current_cpu->execute(entry);
646	>	#endif
647	>	// start emulation loop and enable code translation or caching
648	>	current_cpu->execute(entry, true);
649		}
650
651		/*
652		*  Handle PowerPC interrupt
653		*/
654
655	<	// Atomic operations
656	<	extern int atomic_add(int *var, int v);
657	<	extern int atomic_and(int *var, int v);
658	<	extern int atomic_or(int *var, int v);
659	<
660	<	#if !ASYNC_IRQ
655	>	#if ASYNC_IRQ
656	>	void HandleInterrupt(void)
657	>	{
658	>	main_cpu->handle_interrupt();
659	>	}
660	>	#else
661		void TriggerInterrupt(void)
662		{
663		#if 0
664		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
665		#else
666	<	SPCFLAGS_SET( SPCFLAG_INT );
666	>	// Trigger interrupt to main cpu only
667	>	if (main_cpu)
668	>	main_cpu->trigger_interrupt();
669		#endif
670		}
671		#endif
672
673	<	void HandleInterrupt(void)
673	>	void sheepshaver_cpu::handle_interrupt(void)
674		{
675		// Do nothing if interrupts are disabled
676		if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
#	Line 637 | Line 689 | void HandleInterrupt(void)
689		// 68k emulator active, trigger 68k interrupt level 1
690		assert(current_cpu == main_cpu);
691		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
692	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
692	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
693		break;
694
695		#if INTERRUPTS_IN_NATIVE_MODE
696		case MODE_NATIVE:
697		// 68k emulator inactive, in nanokernel?
698		assert(current_cpu == main_cpu);
699	<	if (main_cpu->gpr(1) != KernelDataAddr) {
699	>	if (gpr(1) != KernelDataAddr) {
700		// Prepare for 68k interrupt level 1
701		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
702		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 745 | Line 797 | static void r_get_resource(void);
797
798		static void NativeOp(int selector)
799		{
800	+	#if EMUL_TIME_STATS
801	+	native_exec_count++;
802	+	const clock_t native_exec_start = clock();
803	+	#endif
804	+
805		switch (selector) {
806		case NATIVE_PATCH_NAME_REGISTRY:
807		DoPatchNameRegistry();
#	Line 808 | Line 865 | static void NativeOp(int selector)
865		QuitEmulator();
866		break;
867		}
868	+
869	+	#if EMUL_TIME_STATS
870	+	native_exec_time += (clock() - native_exec_start);
871	+	#endif
872		}
873
874		/*
#	Line 900 | Line 961 | uint32 call_macos7(uint32 tvect, uint32
961		}
962
963		/*
903	–	*  Atomic operations
904	–	*/
905	–
906	–	int atomic_add(int *var, int v)
907	–	{
908	–	int ret = *var;
909	–	*var += v;
910	–	return ret;
911	–	}
912	–
913	–	int atomic_and(int *var, int v)
914	–	{
915	–	int ret = *var;
916	–	*var &= v;
917	–	return ret;
918	–	}
919	–
920	–	int atomic_or(int *var, int v)
921	–	{
922	–	int ret = *var;
923	–	*var |= v;
924	–	return ret;
925	–	}
926	–
927	–	/*
964		*  Resource Manager thunks
965		*/
966

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