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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 1.17 by gbeauche, 2003-11-10T16:23:58Z

#	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 36 | Line 35
35		#include "video.h"
36		#include "name_registry.h"
37		#include "serial.h"
38	+	#include "ether.h"
39
40		#include <stdio.h>
41
#	Line 44 | Line 44
44		#include "mon_disass.h"
45		#endif
46
47	<	#define DEBUG 1
47	>	#define DEBUG 0
48		#include "debug.h"
49
50	+	// Emulation time statistics
51	+	#define EMUL_TIME_STATS 1
52	+
53	+	#if EMUL_TIME_STATS
54	+	static clock_t emul_start_time;
55	+	static uint32 interrupt_count = 0;
56	+	static clock_t interrupt_time = 0;
57	+	static uint32 exec68k_count = 0;
58	+	static clock_t exec68k_time = 0;
59	+	static uint32 native_exec_count = 0;
60	+	static clock_t native_exec_time = 0;
61	+	static uint32 macos_exec_count = 0;
62	+	static clock_t macos_exec_time = 0;
63	+	#endif
64	+
65		static void enter_mon(void)
66		{
67		// Start up mon in real-mode
#	Line 57 | Line 72 | static void enter_mon(void)
72		}
73
74		// Enable multicore (main/interrupts) cpu emulation?
75	<	#define MULTICORE_CPU 0
75	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
76
77		// Enable Execute68k() safety checks?
78		#define SAFE_EXEC_68K 1
#	Line 74 | Line 89 | static void enter_mon(void)
89		// Pointer to Kernel Data
90		static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
91
92	+	// SIGSEGV handler
93	+	static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
94	+
95
96		/**
97		*              PowerPC emulator glue with special 'sheep' opcodes
98		**/
99
82	–	struct sheepshaver_exec_return { };
83	–
100		class sheepshaver_cpu
101		: public powerpc_cpu
102		{
#	Line 89 | Line 105 | class sheepshaver_cpu
105
106		public:
107
108	<	sheepshaver_cpu()
109	<	: powerpc_cpu()
94	<	{ init_decoder(); }
108	>	// Constructor
109	>	sheepshaver_cpu();
110
111		// Condition Register accessors
112		uint32 get_cr() const           { return cr().get(); }
113		void set_cr(uint32 v)           { cr().set(v); }
114
115		// Execution loop
116	<	void execute(uint32 pc);
116	>	void execute(uint32 entry, bool enable_cache = false);
117
118		// Execute 68k routine
119		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 114 | Line 129 | public:
129
130		// Handle MacOS interrupt
131		void interrupt(uint32 entry);
132	<
118	<	// spcflags for interrupts handling
119	<	static uint32 spcflags;
132	>	void handle_interrupt();
133
134		// Lazy memory allocator (one item at a time)
135		void *operator new(size_t size)
#	Line 126 | Line 139 | public:
139		// FIXME: really make surre array allocation fail at link time?
140		void *operator new[](size_t);
141		void operator delete[](void *p);
142	+
143	+	// Make sure the SIGSEGV handler can access CPU registers
144	+	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
145		};
146
131	–	uint32 sheepshaver_cpu::spcflags = 0;
147		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
148
149	+	sheepshaver_cpu::sheepshaver_cpu()
150	+	: powerpc_cpu()
151	+	{
152	+	init_decoder();
153	+	}
154	+
155		void sheepshaver_cpu::init_decoder()
156		{
157		#ifndef PPC_NO_STATIC_II_INDEX_TABLE
#	Line 142 | Line 163 | void sheepshaver_cpu::init_decoder()
163
164		static const instr_info_t sheep_ii_table[] = {
165		{ "sheep",
166	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
166	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
167		NULL,
168		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
169		}
#	Line 181 | Line 202 | void sheepshaver_cpu::execute_sheep(uint
202		case 0:         // EMUL_RETURN
203		QuitEmulator();
204		break;
205	<
205	>
206		case 1:         // EXEC_RETURN
207	<	throw sheepshaver_exec_return();
207	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
208		break;
209
210		case 2:         // EXEC_NATIVE
#	Line 216 | Line 237 | void sheepshaver_cpu::execute_sheep(uint
237		}
238		}
239
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	–
240		// Execution loop
241	<	void sheepshaver_cpu::execute(uint32 entry)
241	>	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
242		{
243	<	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	<	}
243	>	powerpc_cpu::execute(entry, enable_cache);
244		}
245
246		// Handle MacOS interrupt
247		void sheepshaver_cpu::interrupt(uint32 entry)
248		{
249	+	#if EMUL_TIME_STATS
250	+	interrupt_count++;
251	+	const clock_t interrupt_start = clock();
252	+	#endif
253	+
254		#if !MULTICORE_CPU
255		// Save program counters and branch registers
256		uint32 saved_pc = pc();
#	Line 294 | Line 284 | void sheepshaver_cpu::interrupt(uint32 e
284		gpr(8)  = 0;
285		gpr(10) = (uint32)trampoline;
286		gpr(12) = (uint32)trampoline;
287	<	gpr(13) = cr().get();
287	>	gpr(13) = get_cr();
288
289		// rlwimi. r7,r7,8,0,0
290		uint32 result = op_ppc_rlwimi::apply(gpr(7), 8, 0x80000000, gpr(7));
#	Line 302 | Line 292 | void sheepshaver_cpu::interrupt(uint32 e
292		gpr(7) = result;
293
294		gpr(11) = 0xf072; // MSR (SRR1)
295	<	cr().set((gpr(11) & 0x0fff0000) | (cr().get() & ~0x0fff0000));
295	>	cr().set((gpr(11) & 0x0fff0000) | (get_cr() & ~0x0fff0000));
296
297		// Enter nanokernel
298		execute(entry);
#	Line 314 | Line 304 | void sheepshaver_cpu::interrupt(uint32 e
304		ctr()= saved_ctr;
305		gpr(1) = saved_sp;
306		#endif
307	+
308	+	#if EMUL_TIME_STATS
309	+	interrupt_time += (clock() - interrupt_start);
310	+	#endif
311		}
312
313		// Execute 68k routine
314		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
315		{
316	+	#if EMUL_TIME_STATS
317	+	exec68k_count++;
318	+	const clock_t exec68k_start = clock();
319	+	#endif
320	+
321		#if SAFE_EXEC_68K
322		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
323		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 328 | Line 327 | void sheepshaver_cpu::execute_68k(uint32
327		uint32 saved_pc = pc();
328		uint32 saved_lr = lr();
329		uint32 saved_ctr= ctr();
330	+	uint32 saved_cr = get_cr();
331
332		// Create MacOS stack frame
333		// FIXME: make sure MacOS doesn't expect PPC registers to live on top
#	Line 399 | Line 399 | void sheepshaver_cpu::execute_68k(uint32
399		pc() = saved_pc;
400		lr() = saved_lr;
401		ctr()= saved_ctr;
402	+	set_cr(saved_cr);
403	+
404	+	#if EMUL_TIME_STATS
405	+	exec68k_time += (clock() - exec68k_start);
406	+	#endif
407		}
408
409		// Call MacOS PPC code
410		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
411		{
412	+	#if EMUL_TIME_STATS
413	+	macos_exec_count++;
414	+	const clock_t macos_exec_start = clock();
415	+	#endif
416	+
417		// Save program counters and branch registers
418		uint32 saved_pc = pc();
419		uint32 saved_lr = lr();
#	Line 442 | Line 452 | uint32 sheepshaver_cpu::execute_macos_co
452		lr() = saved_lr;
453		ctr()= saved_ctr;
454
455	+	#if EMUL_TIME_STATS
456	+	macos_exec_time += (clock() - macos_exec_start);
457	+	#endif
458	+
459		return retval;
460		}
461
#	Line 546 | Line 560 | static sigsegv_return_t sigsegv_handler(
560		if ((addr - ROM_BASE) < ROM_SIZE)
561		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
562
563	<	// Ignore all other faults, if requested
564	<	if (PrefsFindBool("ignoresegv"))
565	<	return SIGSEGV_RETURN_FAILURE;
563	>	// Get program counter of target CPU
564	>	sheepshaver_cpu * const cpu = current_cpu;
565	>	const uint32 pc = cpu->pc();
566	>
567	>	// Fault in Mac ROM or RAM?
568	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
569	>	if (mac_fault) {
570	>
571	>	// "VM settings" during MacOS 8 installation
572	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
573	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
574	>
575	>	// MacOS 8.5 installation
576	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
577	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
578	>
579	>	// MacOS 8 serial drivers on startup
580	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
581	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
582	>
583	>	// MacOS 8.1 serial drivers on startup
584	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
585	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
586	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
587	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
588	>
589	>	// Ignore all other faults, if requested
590	>	if (PrefsFindBool("ignoresegv"))
591	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
592	>	}
593		#else
594		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
595		#endif
#	Line 585 | Line 626 | void init_emul_ppc(void)
626		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
627		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
628		#endif
629	+
630	+	#if EMUL_TIME_STATS
631	+	emul_start_time = clock();
632	+	#endif
633	+	}
634	+
635	+	/*
636	+	*  Deinitialize emulation
637	+	*/
638	+
639	+	void exit_emul_ppc(void)
640	+	{
641	+	#if EMUL_TIME_STATS
642	+	clock_t emul_end_time = clock();
643	+
644	+	printf("### Statistics for SheepShaver emulation parts\n");
645	+	const clock_t emul_time = emul_end_time - emul_start_time;
646	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
647	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
648	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
649	+
650	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
651	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
652	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
653	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
654	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
655	+	} while (0)
656	+
657	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
658	+	PRINT_STATS("NativeOp execution", native_exec);
659	+	PRINT_STATS("MacOS routine execution", macos_exec);
660	+
661	+	#undef PRINT_STATS
662	+	printf("\n");
663	+	#endif
664	+
665	+	delete main_cpu;
666	+	#if MULTICORE_CPU
667	+	delete interrupt_cpu;
668	+	#endif
669		}
670
671		/*
#	Line 594 | Line 675 | void init_emul_ppc(void)
675		void emul_ppc(uint32 entry)
676		{
677		current_cpu = main_cpu;
678	+	#if DEBUG
679		current_cpu->start_log();
680	<	current_cpu->execute(entry);
680	>	#endif
681	>	// start emulation loop and enable code translation or caching
682	>	current_cpu->execute(entry, true);
683		}
684
685		/*
686		*  Handle PowerPC interrupt
687		*/
688
689	<	// Atomic operations
690	<	extern int atomic_add(int *var, int v);
691	<	extern int atomic_and(int *var, int v);
692	<	extern int atomic_or(int *var, int v);
693	<
694	<	#if !ASYNC_IRQ
689	>	#if ASYNC_IRQ
690	>	void HandleInterrupt(void)
691	>	{
692	>	main_cpu->handle_interrupt();
693	>	}
694	>	#else
695		void TriggerInterrupt(void)
696		{
697		#if 0
698		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
699		#else
700	<	SPCFLAGS_SET( SPCFLAG_INT );
700	>	// Trigger interrupt to main cpu only
701	>	if (main_cpu)
702	>	main_cpu->trigger_interrupt();
703		#endif
704		}
705		#endif
706
707	<	void HandleInterrupt(void)
707	>	void sheepshaver_cpu::handle_interrupt(void)
708		{
709		// Do nothing if interrupts are disabled
710	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
710	>	if (*(int32 *)XLM_IRQ_NEST > 0)
711		return;
712
713		// Do nothing if there is no interrupt pending
#	Line 637 | Line 723 | void HandleInterrupt(void)
723		// 68k emulator active, trigger 68k interrupt level 1
724		assert(current_cpu == main_cpu);
725		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
726	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
726	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
727		break;
728
729		#if INTERRUPTS_IN_NATIVE_MODE
730		case MODE_NATIVE:
731		// 68k emulator inactive, in nanokernel?
732		assert(current_cpu == main_cpu);
733	<	if (main_cpu->gpr(1) != KernelDataAddr) {
733	>	if (gpr(1) != KernelDataAddr) {
734		// Prepare for 68k interrupt level 1
735		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
736		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 745 | Line 831 | static void r_get_resource(void);
831
832		static void NativeOp(int selector)
833		{
834	+	#if EMUL_TIME_STATS
835	+	native_exec_count++;
836	+	const clock_t native_exec_start = clock();
837	+	#endif
838	+
839		switch (selector) {
840		case NATIVE_PATCH_NAME_REGISTRY:
841		DoPatchNameRegistry();
#	Line 759 | Line 850 | static void NativeOp(int selector)
850		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
851		(void *)GPR(5), GPR(6), GPR(7));
852		break;
853	<	case NATIVE_GET_RESOURCE:
854	<	get_resource();
853	>	#ifdef WORDS_BIGENDIAN
854	>	case NATIVE_ETHER_IRQ:
855	>	EtherIRQ();
856		break;
857	<	case NATIVE_GET_1_RESOURCE:
858	<	get_1_resource();
857	>	case NATIVE_ETHER_INIT:
858	>	GPR(3) = InitStreamModule((void *)GPR(3));
859		break;
860	<	case NATIVE_GET_IND_RESOURCE:
861	<	get_ind_resource();
860	>	case NATIVE_ETHER_TERM:
861	>	TerminateStreamModule();
862		break;
863	<	case NATIVE_GET_1_IND_RESOURCE:
864	<	get_1_ind_resource();
863	>	case NATIVE_ETHER_OPEN:
864	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
865	>	break;
866	>	case NATIVE_ETHER_CLOSE:
867	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
868	>	break;
869	>	case NATIVE_ETHER_WPUT:
870	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
871		break;
872	<	case NATIVE_R_GET_RESOURCE:
873	<	r_get_resource();
872	>	case NATIVE_ETHER_RSRV:
873	>	GPR(3) = ether_rsrv((queue_t *)GPR(3));
874		break;
875	+	#else
876	+	case NATIVE_ETHER_INIT:
877	+	// FIXME: needs more complicated thunks
878	+	GPR(3) = false;
879	+	break;
880	+	#endif
881		case NATIVE_SERIAL_NOTHING:
882		case NATIVE_SERIAL_OPEN:
883		case NATIVE_SERIAL_PRIME_IN:
#	Line 794 | Line 898 | static void NativeOp(int selector)
898		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
899		break;
900		}
901	+	case NATIVE_GET_RESOURCE:
902	+	case NATIVE_GET_1_RESOURCE:
903	+	case NATIVE_GET_IND_RESOURCE:
904	+	case NATIVE_GET_1_IND_RESOURCE:
905	+	case NATIVE_R_GET_RESOURCE: {
906	+	typedef void (*GetResourceCallback)(void);
907	+	static const GetResourceCallback get_resource_callbacks[] = {
908	+	get_resource,
909	+	get_1_resource,
910	+	get_ind_resource,
911	+	get_1_ind_resource,
912	+	r_get_resource
913	+	};
914	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
915	+	break;
916	+	}
917		case NATIVE_DISABLE_INTERRUPT:
918		DisableInterrupt();
919		break;
#	Line 808 | Line 928 | static void NativeOp(int selector)
928		QuitEmulator();
929		break;
930		}
931	+
932	+	#if EMUL_TIME_STATS
933	+	native_exec_time += (clock() - native_exec_start);
934	+	#endif
935		}
936
937		/*
#	Line 900 | Line 1024 | uint32 call_macos7(uint32 tvect, uint32
1024		}
1025
1026		/*
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	–	/*
1027		*  Resource Manager thunks
1028		*/
1029

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