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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.22 by gbeauche, 2003-12-04T23:37:38Z vs.
Revision 1.30 by gbeauche, 2004-02-24T11:12:54Z

#	Line 1 | Line 1
1		/*
2		*  sheepshaver_glue.cpp - Glue Kheperix CPU to SheepShaver CPU engine interface
3		*
4	<	*  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
4	>	*  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 73 | Line 73 | static void enter_mon(void)
73		#endif
74		}
75
76	+	// From main_*.cpp
77	+	extern uintptr SignalStackBase();
78	+
79	+	// From rsrc_patches.cpp
80	+	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
81	+
82		// PowerPC EmulOp to exit from emulation looop
83		const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
84
#	Line 124 | Line 130 | public:
130		// Constructor
131		sheepshaver_cpu();
132
133	<	// Condition Register accessors
133	>	// CR & XER accessors
134		uint32 get_cr() const           { return cr().get(); }
135		void set_cr(uint32 v)           { cr().set(v); }
136	+	uint32 get_xer() const          { return xer().get(); }
137	+	void set_xer(uint32 v)          { xer().set(v); }
138	+
139	+	// Execute EMUL_OP routine
140	+	void execute_emul_op(uint32 emul_op);
141
142		// Execute 68k routine
143		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 137 | Line 148 | public:
148		// Execute MacOS/PPC code
149		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
150
151	+	// Compile one instruction
152	+	virtual bool compile1(codegen_context_t & cg_context);
153	+
154		// Resource manager thunk
155		void get_resource(uint32 old_get_resource);
156
#	Line 144 | Line 158 | public:
158		void interrupt(uint32 entry);
159		void handle_interrupt();
160
147	–	// Lazy memory allocator (one item at a time)
148	–	void *operator new(size_t size)
149	–	{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
150	–	void operator delete(void *p)
151	–	{ allocator_helper< sheepshaver_cpu, lazy_allocator >::deallocate(p); }
152	–	// FIXME: really make surre array allocation fail at link time?
153	–	void *operator new[](size_t);
154	–	void operator delete[](void *p);
155	–
161		// Make sure the SIGSEGV handler can access CPU registers
162		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
163		};
164
165	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
165	>	// Memory allocator returning areas aligned on 16-byte boundaries
166	>	void *operator new(size_t size)
167	>	{
168	>	void *p;
169	>
170	>	/* XXX: try different approaches */
171	>	if (posix_memalign(&p, 16, size) != 0)
172	>	throw std::bad_alloc();
173	>
174	>	return p;
175	>	}
176	>
177	>	void operator delete(void *p)
178	>	{
179	>	free(p);
180	>	}
181
182		sheepshaver_cpu::sheepshaver_cpu()
183		: powerpc_cpu(enable_jit_p())
#	Line 167 | Line 187 | sheepshaver_cpu::sheepshaver_cpu()
187
188		void sheepshaver_cpu::init_decoder()
189		{
170	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
171	–	static bool initialized = false;
172	–	if (initialized)
173	–	return;
174	–	initialized = true;
175	–	#endif
176	–
190		static const instr_info_t sheep_ii_table[] = {
191		{ "sheep",
192		(execute_pmf)&sheepshaver_cpu::execute_sheep,
#	Line 206 | Line 219 | typedef bit_field< 20, 20 > FN_field;
219		typedef bit_field< 21, 25 > NATIVE_OP_field;
220		typedef bit_field< 26, 31 > EMUL_OP_field;
221
222	+	// Execute EMUL_OP routine
223	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
224	+	{
225	+	M68kRegisters r68;
226	+	WriteMacInt32(XLM_68K_R25, gpr(25));
227	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
228	+	for (int i = 0; i < 8; i++)
229	+	r68.d[i] = gpr(8 + i);
230	+	for (int i = 0; i < 7; i++)
231	+	r68.a[i] = gpr(16 + i);
232	+	r68.a[7] = gpr(1);
233	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
234	+	uint32 saved_xer = get_xer();
235	+	EmulOp(&r68, gpr(24), emul_op);
236	+	set_cr(saved_cr);
237	+	set_xer(saved_xer);
238	+	for (int i = 0; i < 8; i++)
239	+	gpr(8 + i) = r68.d[i];
240	+	for (int i = 0; i < 7; i++)
241	+	gpr(16 + i) = r68.a[i];
242	+	gpr(1) = r68.a[7];
243	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
244	+	}
245	+
246		// Execute SheepShaver instruction
247		void sheepshaver_cpu::execute_sheep(uint32 opcode)
248		{
#	Line 229 | Line 266 | void sheepshaver_cpu::execute_sheep(uint
266		pc() += 4;
267		break;
268
269	<	default: {      // EMUL_OP
270	<	M68kRegisters r68;
234	<	WriteMacInt32(XLM_68K_R25, gpr(25));
235	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
236	<	for (int i = 0; i < 8; i++)
237	<	r68.d[i] = gpr(8 + i);
238	<	for (int i = 0; i < 7; i++)
239	<	r68.a[i] = gpr(16 + i);
240	<	r68.a[7] = gpr(1);
241	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
242	<	for (int i = 0; i < 8; i++)
243	<	gpr(8 + i) = r68.d[i];
244	<	for (int i = 0; i < 7; i++)
245	<	gpr(16 + i) = r68.a[i];
246	<	gpr(1) = r68.a[7];
247	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
269	>	default:        // EMUL_OP
270	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
271		pc() += 4;
272		break;
273		}
274	+	}
275	+
276	+	// Compile one instruction
277	+	bool sheepshaver_cpu::compile1(codegen_context_t & cg_context)
278	+	{
279	+	#if PPC_ENABLE_JIT
280	+	const instr_info_t *ii = cg_context.instr_info;
281	+	if (ii->mnemo != PPC_I(SHEEP))
282	+	return false;
283	+
284	+	bool compiled = false;
285	+	powerpc_dyngen & dg = cg_context.codegen;
286	+	uint32 opcode = cg_context.opcode;
287	+
288	+	switch (opcode & 0x3f) {
289	+	case 0:         // EMUL_RETURN
290	+	dg.gen_invoke(QuitEmulator);
291	+	compiled = true;
292	+	break;
293	+
294	+	case 1:         // EXEC_RETURN
295	+	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
296	+	compiled = true;
297	+	break;
298	+
299	+	case 2: {       // EXEC_NATIVE
300	+	uint32 selector = NATIVE_OP_field::extract(opcode);
301	+	switch (selector) {
302	+	case NATIVE_PATCH_NAME_REGISTRY:
303	+	dg.gen_invoke(DoPatchNameRegistry);
304	+	compiled = true;
305	+	break;
306	+	case NATIVE_VIDEO_INSTALL_ACCEL:
307	+	dg.gen_invoke(VideoInstallAccel);
308	+	compiled = true;
309	+	break;
310	+	case NATIVE_VIDEO_VBL:
311	+	dg.gen_invoke(VideoVBL);
312	+	compiled = true;
313	+	break;
314	+	case NATIVE_GET_RESOURCE:
315	+	case NATIVE_GET_1_RESOURCE:
316	+	case NATIVE_GET_IND_RESOURCE:
317	+	case NATIVE_GET_1_IND_RESOURCE:
318	+	case NATIVE_R_GET_RESOURCE: {
319	+	static const uint32 get_resource_ptr[] = {
320	+	XLM_GET_RESOURCE,
321	+	XLM_GET_1_RESOURCE,
322	+	XLM_GET_IND_RESOURCE,
323	+	XLM_GET_1_IND_RESOURCE,
324	+	XLM_R_GET_RESOURCE
325	+	};
326	+	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
327	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
328	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
329	+	dg.gen_invoke_CPU_im(func, old_get_resource);
330	+	compiled = true;
331	+	break;
332	+	}
333	+	case NATIVE_DISABLE_INTERRUPT:
334	+	dg.gen_invoke(DisableInterrupt);
335	+	compiled = true;
336	+	break;
337	+	case NATIVE_ENABLE_INTERRUPT:
338	+	dg.gen_invoke(EnableInterrupt);
339	+	compiled = true;
340	+	break;
341	+	case NATIVE_CHECK_LOAD_INVOC:
342	+	dg.gen_load_T0_GPR(3);
343	+	dg.gen_load_T1_GPR(4);
344	+	dg.gen_se_16_32_T1();
345	+	dg.gen_load_T2_GPR(5);
346	+	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
347	+	compiled = true;
348	+	break;
349	+	}
350	+	if (FN_field::test(opcode)) {
351	+	if (compiled) {
352	+	dg.gen_load_A0_LR();
353	+	dg.gen_set_PC_A0();
354	+	}
355	+	cg_context.done_compile = true;
356	+	}
357	+	else
358	+	cg_context.done_compile = false;
359	+	break;
360	+	}
361	+
362	+	default: {      // EMUL_OP
363	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
364	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
365	+	dg.gen_invoke_CPU_im(func, EMUL_OP_field::extract(opcode) - 3);
366	+	cg_context.done_compile = false;
367	+	compiled = true;
368	+	break;
369	+	}
370		}
371	+	return compiled;
372	+	#endif
373	+	return false;
374		}
375
376		// Handle MacOS interrupt
#	Line 268 | Line 390 | void sheepshaver_cpu::interrupt(uint32 e
390		#endif
391
392		// Initialize stack pointer to SheepShaver alternate stack base
393	<	SheepArray<64> stack_area;
272	<	gpr(1) = stack_area.addr();
393	>	gpr(1) = SignalStackBase() - 64;
394
395		// Build trampoline to return from interrupt
396		SheepVar32 trampoline = POWERPC_EXEC_RETURN;
#	Line 485 | Line 606 | inline void sheepshaver_cpu::execute_ppc
606		}
607
608		// Resource Manager thunk
488	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
489	–
609		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
610		{
611		uint32 type = gpr(3);
#	Line 596 | Line 715 | static sigsegv_return_t sigsegv_handler(
715		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
716		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
717
718	+	// Ignore writes to the zero page
719	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
720	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
721	+
722		// Ignore all other faults, if requested
723		if (PrefsFindBool("ignoresegv"))
724		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#	Line 621 | Line 744 | void init_emul_ppc(void)
744		// Initialize main CPU emulator
745		main_cpu = new sheepshaver_cpu();
746		main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
747	+	main_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
748		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
749
750		#if MULTICORE_CPU
#	Line 685 | Line 809 | void exit_emul_ppc(void)
809		void emul_ppc(uint32 entry)
810		{
811		current_cpu = main_cpu;
812	<	#if DEBUG
812	>	#if 0
813		current_cpu->start_log();
814		#endif
815		// start emulation loop and enable code translation or caching
#	Line 896 | Line 1020 | static void NativeOp(int selector)
1020		case NATIVE_MAKE_EXECUTABLE:
1021		MakeExecutable(0, (void *)GPR(4), GPR(5));
1022		break;
1023	+	case NATIVE_CHECK_LOAD_INVOC:
1024	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1025	+	break;
1026		default:
1027		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1028		QuitEmulator();

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