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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 1.13 by gbeauche, 2003-11-02T14:48:17Z

#	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		static void enter_mon(void)
#	Line 57 | Line 56 | static void enter_mon(void)
56		}
57
58		// Enable multicore (main/interrupts) cpu emulation?
59	<	#define MULTICORE_CPU 0
59	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
60
61		// Enable Execute68k() safety checks?
62		#define SAFE_EXEC_68K 1
#	Line 79 | Line 78 | static KernelData * const kernel_data =
78		*              PowerPC emulator glue with special 'sheep' opcodes
79		**/
80
82	–	struct sheepshaver_exec_return { };
83	–
81		class sheepshaver_cpu
82		: public powerpc_cpu
83		{
#	Line 89 | Line 86 | class sheepshaver_cpu
86
87		public:
88
89	<	sheepshaver_cpu()
90	<	: powerpc_cpu()
94	<	{ init_decoder(); }
89	>	// Constructor
90	>	sheepshaver_cpu();
91
92		// Condition Register accessors
93		uint32 get_cr() const           { return cr().get(); }
94		void set_cr(uint32 v)           { cr().set(v); }
95
96		// Execution loop
97	<	void execute(uint32 pc);
97	>	void execute(uint32 entry, bool enable_cache = false);
98
99		// Execute 68k routine
100		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 114 | Line 110 | public:
110
111		// Handle MacOS interrupt
112		void interrupt(uint32 entry);
113	<
118	<	// spcflags for interrupts handling
119	<	static uint32 spcflags;
113	>	void handle_interrupt();
114
115		// Lazy memory allocator (one item at a time)
116		void *operator new(size_t size)
#	Line 128 | Line 122 | public:
122		void operator delete[](void *p);
123		};
124
131	–	uint32 sheepshaver_cpu::spcflags = 0;
125		lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
126
127	+	sheepshaver_cpu::sheepshaver_cpu()
128	+	: powerpc_cpu()
129	+	{
130	+	init_decoder();
131	+	}
132	+
133		void sheepshaver_cpu::init_decoder()
134		{
135		#ifndef PPC_NO_STATIC_II_INDEX_TABLE
#	Line 142 | Line 141 | void sheepshaver_cpu::init_decoder()
141
142		static const instr_info_t sheep_ii_table[] = {
143		{ "sheep",
144	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
144	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
145		NULL,
146		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
147		}
#	Line 181 | Line 180 | void sheepshaver_cpu::execute_sheep(uint
180		case 0:         // EMUL_RETURN
181		QuitEmulator();
182		break;
183	<
183	>
184		case 1:         // EXEC_RETURN
185	<	throw sheepshaver_exec_return();
185	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
186		break;
187
188		case 2:         // EXEC_NATIVE
#	Line 216 | Line 215 | void sheepshaver_cpu::execute_sheep(uint
215		}
216		}
217
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	–
218		// Execution loop
219	<	void sheepshaver_cpu::execute(uint32 entry)
219	>	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
220		{
221	<	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	<	}
221	>	powerpc_cpu::execute(entry, enable_cache);
222		}
223
224		// Handle MacOS interrupt
#	Line 294 | Line 257 | void sheepshaver_cpu::interrupt(uint32 e
257		gpr(8)  = 0;
258		gpr(10) = (uint32)trampoline;
259		gpr(12) = (uint32)trampoline;
260	<	gpr(13) = cr().get();
260	>	gpr(13) = get_cr();
261
262		// rlwimi. r7,r7,8,0,0
263		uint32 result = op_ppc_rlwimi::apply(gpr(7), 8, 0x80000000, gpr(7));
#	Line 302 | Line 265 | void sheepshaver_cpu::interrupt(uint32 e
265		gpr(7) = result;
266
267		gpr(11) = 0xf072; // MSR (SRR1)
268	<	cr().set((gpr(11) & 0x0fff0000) | (cr().get() & ~0x0fff0000));
268	>	cr().set((gpr(11) & 0x0fff0000) | (get_cr() & ~0x0fff0000));
269
270		// Enter nanokernel
271		execute(entry);
#	Line 328 | Line 291 | void sheepshaver_cpu::execute_68k(uint32
291		uint32 saved_pc = pc();
292		uint32 saved_lr = lr();
293		uint32 saved_ctr= ctr();
294	+	uint32 saved_cr = get_cr();
295
296		// Create MacOS stack frame
297		// FIXME: make sure MacOS doesn't expect PPC registers to live on top
#	Line 399 | Line 363 | void sheepshaver_cpu::execute_68k(uint32
363		pc() = saved_pc;
364		lr() = saved_lr;
365		ctr()= saved_ctr;
366	+	set_cr(saved_cr);
367		}
368
369		// Call MacOS PPC code
#	Line 594 | Line 559 | void init_emul_ppc(void)
559		void emul_ppc(uint32 entry)
560		{
561		current_cpu = main_cpu;
562	+	#if DEBUG
563		current_cpu->start_log();
564	<	current_cpu->execute(entry);
564	>	#endif
565	>	// start emulation loop and enable code translation or caching
566	>	current_cpu->execute(entry, true);
567		}
568
569		/*
570		*  Handle PowerPC interrupt
571		*/
572
573	<	// Atomic operations
574	<	extern int atomic_add(int *var, int v);
575	<	extern int atomic_and(int *var, int v);
576	<	extern int atomic_or(int *var, int v);
577	<
578	<	#if !ASYNC_IRQ
573	>	#if ASYNC_IRQ
574	>	void HandleInterrupt(void)
575	>	{
576	>	main_cpu->handle_interrupt();
577	>	}
578	>	#else
579		void TriggerInterrupt(void)
580		{
581		#if 0
582		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
583		#else
584	<	SPCFLAGS_SET( SPCFLAG_INT );
584	>	// Trigger interrupt to main cpu only
585	>	if (main_cpu)
586	>	main_cpu->trigger_interrupt();
587		#endif
588		}
589		#endif
590
591	<	void HandleInterrupt(void)
591	>	void sheepshaver_cpu::handle_interrupt(void)
592		{
593		// Do nothing if interrupts are disabled
594		if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
#	Line 637 | Line 607 | void HandleInterrupt(void)
607		// 68k emulator active, trigger 68k interrupt level 1
608		assert(current_cpu == main_cpu);
609		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
610	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
610	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
611		break;
612
613		#if INTERRUPTS_IN_NATIVE_MODE
614		case MODE_NATIVE:
615		// 68k emulator inactive, in nanokernel?
616		assert(current_cpu == main_cpu);
617	<	if (main_cpu->gpr(1) != KernelDataAddr) {
617	>	if (gpr(1) != KernelDataAddr) {
618		// Prepare for 68k interrupt level 1
619		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
620		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 900 | Line 870 | uint32 call_macos7(uint32 tvect, uint32
870		}
871
872		/*
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	–	/*
873		*  Resource Manager thunks
874		*/
875

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