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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 1.31 by gbeauche, 2004-02-24T14:09:12Z

#	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 40 | Line 40
40		#include "ether.h"
41
42		#include <stdio.h>
43	+	#include <stdlib.h>
44
45		#if ENABLE_MON
46		#include "mon.h"
#	Line 73 | Line 74 | static void enter_mon(void)
74		#endif
75		}
76
77	+	// From main_*.cpp
78	+	extern uintptr SignalStackBase();
79	+
80	+	// From rsrc_patches.cpp
81	+	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
82	+
83		// PowerPC EmulOp to exit from emulation looop
84		const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
85
#	Line 124 | Line 131 | public:
131		// Constructor
132		sheepshaver_cpu();
133
134	<	// Condition Register accessors
134	>	// CR & XER accessors
135		uint32 get_cr() const           { return cr().get(); }
136		void set_cr(uint32 v)           { cr().set(v); }
137	+	uint32 get_xer() const          { return xer().get(); }
138	+	void set_xer(uint32 v)          { xer().set(v); }
139	+
140	+	// Execute EMUL_OP routine
141	+	void execute_emul_op(uint32 emul_op);
142
143		// Execute 68k routine
144		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 137 | Line 149 | public:
149		// Execute MacOS/PPC code
150		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
151
152	+	// Compile one instruction
153	+	virtual bool compile1(codegen_context_t & cg_context);
154	+
155		// Resource manager thunk
156		void get_resource(uint32 old_get_resource);
157
#	Line 144 | Line 159 | public:
159		void interrupt(uint32 entry);
160		void handle_interrupt();
161
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	–
162		// Make sure the SIGSEGV handler can access CPU registers
163		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
164		};
165
166	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
166	>	// Memory allocator returning areas aligned on 16-byte boundaries
167	>	void *operator new(size_t size)
168	>	{
169	>	void *p;
170	>
171	>	#if defined(HAVE_POSIX_MEMALIGN)
172	>	if (posix_memalign(&p, 16, size) != 0)
173	>	throw std::bad_alloc();
174	>	#elif defined(HAVE_MEMALIGN)
175	>	p = memalign(16, size);
176	>	#elif defined(HAVE_VALLOC)
177	>	p = valloc(size); // page-aligned!
178	>	#else
179	>	/* XXX: handle padding ourselves */
180	>	p = malloc(size);
181	>	#endif
182	>
183	>	return p;
184	>	}
185	>
186	>	void operator delete(void *p)
187	>	{
188	>	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
189	>	#if defined(__GLIBC__)
190	>	// this is known to work only with GNU libc
191	>	free(p);
192	>	#endif
193	>	#else
194	>	free(p);
195	>	#endif
196	>	}
197
198		sheepshaver_cpu::sheepshaver_cpu()
199		: powerpc_cpu(enable_jit_p())
#	Line 167 | Line 203 | sheepshaver_cpu::sheepshaver_cpu()
203
204		void sheepshaver_cpu::init_decoder()
205		{
170	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
171	–	static bool initialized = false;
172	–	if (initialized)
173	–	return;
174	–	initialized = true;
175	–	#endif
176	–
206		static const instr_info_t sheep_ii_table[] = {
207		{ "sheep",
208		(execute_pmf)&sheepshaver_cpu::execute_sheep,
#	Line 206 | Line 235 | typedef bit_field< 20, 20 > FN_field;
235		typedef bit_field< 21, 25 > NATIVE_OP_field;
236		typedef bit_field< 26, 31 > EMUL_OP_field;
237
238	+	// Execute EMUL_OP routine
239	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
240	+	{
241	+	M68kRegisters r68;
242	+	WriteMacInt32(XLM_68K_R25, gpr(25));
243	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
244	+	for (int i = 0; i < 8; i++)
245	+	r68.d[i] = gpr(8 + i);
246	+	for (int i = 0; i < 7; i++)
247	+	r68.a[i] = gpr(16 + i);
248	+	r68.a[7] = gpr(1);
249	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
250	+	uint32 saved_xer = get_xer();
251	+	EmulOp(&r68, gpr(24), emul_op);
252	+	set_cr(saved_cr);
253	+	set_xer(saved_xer);
254	+	for (int i = 0; i < 8; i++)
255	+	gpr(8 + i) = r68.d[i];
256	+	for (int i = 0; i < 7; i++)
257	+	gpr(16 + i) = r68.a[i];
258	+	gpr(1) = r68.a[7];
259	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
260	+	}
261	+
262		// Execute SheepShaver instruction
263		void sheepshaver_cpu::execute_sheep(uint32 opcode)
264		{
#	Line 229 | Line 282 | void sheepshaver_cpu::execute_sheep(uint
282		pc() += 4;
283		break;
284
285	<	default: {      // EMUL_OP
286	<	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);
285	>	default:        // EMUL_OP
286	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
287		pc() += 4;
288		break;
289		}
290	+	}
291	+
292	+	// Compile one instruction
293	+	bool sheepshaver_cpu::compile1(codegen_context_t & cg_context)
294	+	{
295	+	#if PPC_ENABLE_JIT
296	+	const instr_info_t *ii = cg_context.instr_info;
297	+	if (ii->mnemo != PPC_I(SHEEP))
298	+	return false;
299	+
300	+	bool compiled = false;
301	+	powerpc_dyngen & dg = cg_context.codegen;
302	+	uint32 opcode = cg_context.opcode;
303	+
304	+	switch (opcode & 0x3f) {
305	+	case 0:         // EMUL_RETURN
306	+	dg.gen_invoke(QuitEmulator);
307	+	compiled = true;
308	+	break;
309	+
310	+	case 1:         // EXEC_RETURN
311	+	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
312	+	compiled = true;
313	+	break;
314	+
315	+	case 2: {       // EXEC_NATIVE
316	+	uint32 selector = NATIVE_OP_field::extract(opcode);
317	+	switch (selector) {
318	+	case NATIVE_PATCH_NAME_REGISTRY:
319	+	dg.gen_invoke(DoPatchNameRegistry);
320	+	compiled = true;
321	+	break;
322	+	case NATIVE_VIDEO_INSTALL_ACCEL:
323	+	dg.gen_invoke(VideoInstallAccel);
324	+	compiled = true;
325	+	break;
326	+	case NATIVE_VIDEO_VBL:
327	+	dg.gen_invoke(VideoVBL);
328	+	compiled = true;
329	+	break;
330	+	case NATIVE_GET_RESOURCE:
331	+	case NATIVE_GET_1_RESOURCE:
332	+	case NATIVE_GET_IND_RESOURCE:
333	+	case NATIVE_GET_1_IND_RESOURCE:
334	+	case NATIVE_R_GET_RESOURCE: {
335	+	static const uint32 get_resource_ptr[] = {
336	+	XLM_GET_RESOURCE,
337	+	XLM_GET_1_RESOURCE,
338	+	XLM_GET_IND_RESOURCE,
339	+	XLM_GET_1_IND_RESOURCE,
340	+	XLM_R_GET_RESOURCE
341	+	};
342	+	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
343	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
344	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
345	+	dg.gen_invoke_CPU_im(func, old_get_resource);
346	+	compiled = true;
347	+	break;
348	+	}
349	+	case NATIVE_DISABLE_INTERRUPT:
350	+	dg.gen_invoke(DisableInterrupt);
351	+	compiled = true;
352	+	break;
353	+	case NATIVE_ENABLE_INTERRUPT:
354	+	dg.gen_invoke(EnableInterrupt);
355	+	compiled = true;
356	+	break;
357	+	case NATIVE_CHECK_LOAD_INVOC:
358	+	dg.gen_load_T0_GPR(3);
359	+	dg.gen_load_T1_GPR(4);
360	+	dg.gen_se_16_32_T1();
361	+	dg.gen_load_T2_GPR(5);
362	+	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
363	+	compiled = true;
364	+	break;
365	+	}
366	+	if (FN_field::test(opcode)) {
367	+	if (compiled) {
368	+	dg.gen_load_A0_LR();
369	+	dg.gen_set_PC_A0();
370	+	}
371	+	cg_context.done_compile = true;
372	+	}
373	+	else
374	+	cg_context.done_compile = false;
375	+	break;
376	+	}
377	+
378	+	default: {      // EMUL_OP
379	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
380	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
381	+	dg.gen_invoke_CPU_im(func, EMUL_OP_field::extract(opcode) - 3);
382	+	cg_context.done_compile = false;
383	+	compiled = true;
384	+	break;
385	+	}
386		}
387	+	return compiled;
388	+	#endif
389	+	return false;
390		}
391
392		// Handle MacOS interrupt
#	Line 268 | Line 406 | void sheepshaver_cpu::interrupt(uint32 e
406		#endif
407
408		// Initialize stack pointer to SheepShaver alternate stack base
409	<	SheepArray<64> stack_area;
272	<	gpr(1) = stack_area.addr();
409	>	gpr(1) = SignalStackBase() - 64;
410
411		// Build trampoline to return from interrupt
412		SheepVar32 trampoline = POWERPC_EXEC_RETURN;
#	Line 485 | Line 622 | inline void sheepshaver_cpu::execute_ppc
622		}
623
624		// Resource Manager thunk
488	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
489	–
625		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
626		{
627		uint32 type = gpr(3);
#	Line 596 | Line 731 | static sigsegv_return_t sigsegv_handler(
731		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
732		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
733
734	+	// Ignore writes to the zero page
735	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
736	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
737	+
738		// Ignore all other faults, if requested
739		if (PrefsFindBool("ignoresegv"))
740		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#	Line 621 | Line 760 | void init_emul_ppc(void)
760		// Initialize main CPU emulator
761		main_cpu = new sheepshaver_cpu();
762		main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
763	+	main_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
764		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
765
766		#if MULTICORE_CPU
#	Line 685 | Line 825 | void exit_emul_ppc(void)
825		void emul_ppc(uint32 entry)
826		{
827		current_cpu = main_cpu;
828	<	#if DEBUG
828	>	#if 0
829		current_cpu->start_log();
830		#endif
831		// start emulation loop and enable code translation or caching
#	Line 896 | Line 1036 | static void NativeOp(int selector)
1036		case NATIVE_MAKE_EXECUTABLE:
1037		MakeExecutable(0, (void *)GPR(4), GPR(5));
1038		break;
1039	+	case NATIVE_CHECK_LOAD_INVOC:
1040	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1041	+	break;
1042		default:
1043		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1044		QuitEmulator();

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