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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.25 by cebix, 2004-01-12T15:37:24Z vs.
Revision 1.37 by gbeauche, 2004-05-15T17:26:28Z

#	Line 38 | Line 38
38		#include "name_registry.h"
39		#include "serial.h"
40		#include "ether.h"
41	+	#include "timer.h"
42
43		#include <stdio.h>
44	+	#include <stdlib.h>
45
46		#if ENABLE_MON
47		#include "mon.h"
#	Line 76 | Line 78 | static void enter_mon(void)
78		// From main_*.cpp
79		extern uintptr SignalStackBase();
80
81	+	// From rsrc_patches.cpp
82	+	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
83	+
84		// PowerPC EmulOp to exit from emulation looop
85		const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
86
87		// Enable multicore (main/interrupts) cpu emulation?
88		#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
89
90	+	// Enable interrupt routine safety checks?
91	+	#define SAFE_INTERRUPT_PPC 1
92	+
93		// Enable Execute68k() safety checks?
94		#define SAFE_EXEC_68K 1
95
#	Line 94 | Line 102 | const uint32 POWERPC_EXEC_RETURN = POWER
102		// Interrupts in native mode?
103		#define INTERRUPTS_IN_NATIVE_MODE 1
104
105	+	// Enable native EMUL_OPs to be run without a mode switch
106	+	#define ENABLE_NATIVE_EMUL_OP 1
107	+
108		// Pointer to Kernel Data
109		static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
110
#	Line 122 | Line 133 | class sheepshaver_cpu
133		void init_decoder();
134		void execute_sheep(uint32 opcode);
135
136	+	// Filter out EMUL_OP routines that only call native code
137	+	bool filter_execute_emul_op(uint32 emul_op);
138	+
139	+	// "Native" EMUL_OP routines
140	+	void execute_emul_op_microseconds();
141	+	void execute_emul_op_idle_time_1();
142	+	void execute_emul_op_idle_time_2();
143	+
144		public:
145
146		// Constructor
#	Line 133 | Line 152 | public:
152		uint32 get_xer() const          { return xer().get(); }
153		void set_xer(uint32 v)          { xer().set(v); }
154
155	+	// Execute EMUL_OP routine
156	+	void execute_emul_op(uint32 emul_op);
157	+
158		// Execute 68k routine
159		void execute_68k(uint32 entry, M68kRegisters *r);
160
#	Line 142 | Line 164 | public:
164		// Execute MacOS/PPC code
165		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
166
167	+	// Compile one instruction
168	+	virtual bool compile1(codegen_context_t & cg_context);
169	+
170		// Resource manager thunk
171		void get_resource(uint32 old_get_resource);
172
#	Line 149 | Line 174 | public:
174		void interrupt(uint32 entry);
175		void handle_interrupt();
176
152	–	// Lazy memory allocator (one item at a time)
153	–	void *operator new(size_t size)
154	–	{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
155	–	void operator delete(void *p)
156	–	{ allocator_helper< sheepshaver_cpu, lazy_allocator >::deallocate(p); }
157	–	// FIXME: really make surre array allocation fail at link time?
158	–	void *operator new[](size_t);
159	–	void operator delete[](void *p);
160	–
177		// Make sure the SIGSEGV handler can access CPU registers
178		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
179		};
180
181	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
181	>	// Memory allocator returning areas aligned on 16-byte boundaries
182	>	void *operator new(size_t size)
183	>	{
184	>	void *p;
185	>
186	>	#if defined(HAVE_POSIX_MEMALIGN)
187	>	if (posix_memalign(&p, 16, size) != 0)
188	>	throw std::bad_alloc();
189	>	#elif defined(HAVE_MEMALIGN)
190	>	p = memalign(16, size);
191	>	#elif defined(HAVE_VALLOC)
192	>	p = valloc(size); // page-aligned!
193	>	#else
194	>	/* XXX: handle padding ourselves */
195	>	p = malloc(size);
196	>	#endif
197	>
198	>	return p;
199	>	}
200	>
201	>	void operator delete(void *p)
202	>	{
203	>	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
204	>	#if defined(__GLIBC__)
205	>	// this is known to work only with GNU libc
206	>	free(p);
207	>	#endif
208	>	#else
209	>	free(p);
210	>	#endif
211	>	}
212
213		sheepshaver_cpu::sheepshaver_cpu()
214		: powerpc_cpu(enable_jit_p())
#	Line 172 | Line 218 | sheepshaver_cpu::sheepshaver_cpu()
218
219		void sheepshaver_cpu::init_decoder()
220		{
175	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
176	–	static bool initialized = false;
177	–	if (initialized)
178	–	return;
179	–	initialized = true;
180	–	#endif
181	–
221		static const instr_info_t sheep_ii_table[] = {
222		{ "sheep",
223		(execute_pmf)&sheepshaver_cpu::execute_sheep,
#	Line 201 | Line 240 | void sheepshaver_cpu::init_decoder()
240		static void NativeOp(int selector);
241
242		/*              NativeOp instruction format:
243	<	+------------+--------------------------+--+----------+------------+
244	<	|      6     |                          |FN|    OP    |      2     |
245	<	+------------+--------------------------+--+----------+------------+
246	<	0         5 |6                       19 20 21      25 26        31
243	>	+------------+-------------------------+--+-----------+------------+
244	>	|      6     |                         |FN|    OP     |      2     |
245	>	+------------+-------------------------+--+-----------+------------+
246	>	0         5 |6                      18 19 20      25 26        31
247		*/
248
249	<	typedef bit_field< 20, 20 > FN_field;
250	<	typedef bit_field< 21, 25 > NATIVE_OP_field;
249	>	typedef bit_field< 19, 19 > FN_field;
250	>	typedef bit_field< 20, 25 > NATIVE_OP_field;
251		typedef bit_field< 26, 31 > EMUL_OP_field;
252
253	+	// "Native" EMUL_OP routines
254	+	#define GPR_A(REG) gpr(16 + (REG))
255	+	#define GPR_D(REG) gpr( 8 + (REG))
256	+
257	+	void sheepshaver_cpu::execute_emul_op_microseconds()
258	+	{
259	+	Microseconds(GPR_A(0), GPR_D(0));
260	+	}
261	+
262	+	void sheepshaver_cpu::execute_emul_op_idle_time_1()
263	+	{
264	+	// Sleep if no events pending
265	+	if (ReadMacInt32(0x14c) == 0)
266	+	Delay_usec(16667);
267	+	GPR_A(0) = ReadMacInt32(0x2b6);
268	+	}
269	+
270	+	void sheepshaver_cpu::execute_emul_op_idle_time_2()
271	+	{
272	+	// Sleep if no events pending
273	+	if (ReadMacInt32(0x14c) == 0)
274	+	Delay_usec(16667);
275	+	GPR_D(0) = (uint32)-2;
276	+	}
277	+
278	+	// Filter out EMUL_OP routines that only call native code
279	+	bool sheepshaver_cpu::filter_execute_emul_op(uint32 emul_op)
280	+	{
281	+	switch (emul_op) {
282	+	case OP_MICROSECONDS:
283	+	execute_emul_op_microseconds();
284	+	return true;
285	+	case OP_IDLE_TIME:
286	+	execute_emul_op_idle_time_1();
287	+	return true;
288	+	case OP_IDLE_TIME_2:
289	+	execute_emul_op_idle_time_2();
290	+	return true;
291	+	}
292	+	return false;
293	+	}
294	+
295	+	// Execute EMUL_OP routine
296	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
297	+	{
298	+	#if ENABLE_NATIVE_EMUL_OP
299	+	// First, filter out EMUL_OPs that can be executed without a mode switch
300	+	if (filter_execute_emul_op(emul_op))
301	+	return;
302	+	#endif
303	+
304	+	M68kRegisters r68;
305	+	WriteMacInt32(XLM_68K_R25, gpr(25));
306	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
307	+	for (int i = 0; i < 8; i++)
308	+	r68.d[i] = gpr(8 + i);
309	+	for (int i = 0; i < 7; i++)
310	+	r68.a[i] = gpr(16 + i);
311	+	r68.a[7] = gpr(1);
312	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
313	+	uint32 saved_xer = get_xer();
314	+	EmulOp(&r68, gpr(24), emul_op);
315	+	set_cr(saved_cr);
316	+	set_xer(saved_xer);
317	+	for (int i = 0; i < 8; i++)
318	+	gpr(8 + i) = r68.d[i];
319	+	for (int i = 0; i < 7; i++)
320	+	gpr(16 + i) = r68.a[i];
321	+	gpr(1) = r68.a[7];
322	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
323	+	}
324	+
325		// Execute SheepShaver instruction
326		void sheepshaver_cpu::execute_sheep(uint32 opcode)
327		{
#	Line 234 | Line 345 | void sheepshaver_cpu::execute_sheep(uint
345		pc() += 4;
346		break;
347
348	<	default: {      // EMUL_OP
349	<	M68kRegisters r68;
239	<	WriteMacInt32(XLM_68K_R25, gpr(25));
240	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
241	<	for (int i = 0; i < 8; i++)
242	<	r68.d[i] = gpr(8 + i);
243	<	for (int i = 0; i < 7; i++)
244	<	r68.a[i] = gpr(16 + i);
245	<	r68.a[7] = gpr(1);
246	<	uint32 saved_cr = get_cr() & CR_field<2>::mask();
247	<	uint32 saved_xer = get_xer();
248	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
249	<	set_cr(saved_cr);
250	<	set_xer(saved_xer);
251	<	for (int i = 0; i < 8; i++)
252	<	gpr(8 + i) = r68.d[i];
253	<	for (int i = 0; i < 7; i++)
254	<	gpr(16 + i) = r68.a[i];
255	<	gpr(1) = r68.a[7];
256	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
348	>	default:        // EMUL_OP
349	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
350		pc() += 4;
351		break;
352		}
353	+	}
354	+
355	+	// Compile one instruction
356	+	bool sheepshaver_cpu::compile1(codegen_context_t & cg_context)
357	+	{
358	+	#if PPC_ENABLE_JIT
359	+	const instr_info_t *ii = cg_context.instr_info;
360	+	if (ii->mnemo != PPC_I(SHEEP))
361	+	return false;
362	+
363	+	bool compiled = false;
364	+	powerpc_dyngen & dg = cg_context.codegen;
365	+	uint32 opcode = cg_context.opcode;
366	+
367	+	switch (opcode & 0x3f) {
368	+	case 0:         // EMUL_RETURN
369	+	dg.gen_invoke(QuitEmulator);
370	+	compiled = true;
371	+	break;
372	+
373	+	case 1:         // EXEC_RETURN
374	+	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
375	+	compiled = true;
376	+	break;
377	+
378	+	case 2: {       // EXEC_NATIVE
379	+	uint32 selector = NATIVE_OP_field::extract(opcode);
380	+	switch (selector) {
381	+	case NATIVE_PATCH_NAME_REGISTRY:
382	+	dg.gen_invoke(DoPatchNameRegistry);
383	+	compiled = true;
384	+	break;
385	+	case NATIVE_VIDEO_INSTALL_ACCEL:
386	+	dg.gen_invoke(VideoInstallAccel);
387	+	compiled = true;
388	+	break;
389	+	case NATIVE_VIDEO_VBL:
390	+	dg.gen_invoke(VideoVBL);
391	+	compiled = true;
392	+	break;
393	+	case NATIVE_GET_RESOURCE:
394	+	case NATIVE_GET_1_RESOURCE:
395	+	case NATIVE_GET_IND_RESOURCE:
396	+	case NATIVE_GET_1_IND_RESOURCE:
397	+	case NATIVE_R_GET_RESOURCE: {
398	+	static const uint32 get_resource_ptr[] = {
399	+	XLM_GET_RESOURCE,
400	+	XLM_GET_1_RESOURCE,
401	+	XLM_GET_IND_RESOURCE,
402	+	XLM_GET_1_IND_RESOURCE,
403	+	XLM_R_GET_RESOURCE
404	+	};
405	+	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
406	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
407	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
408	+	dg.gen_invoke_CPU_im(func, old_get_resource);
409	+	compiled = true;
410	+	break;
411	+	}
412	+	case NATIVE_DISABLE_INTERRUPT:
413	+	dg.gen_invoke(DisableInterrupt);
414	+	compiled = true;
415	+	break;
416	+	case NATIVE_ENABLE_INTERRUPT:
417	+	dg.gen_invoke(EnableInterrupt);
418	+	compiled = true;
419	+	break;
420	+	case NATIVE_CHECK_LOAD_INVOC:
421	+	dg.gen_load_T0_GPR(3);
422	+	dg.gen_load_T1_GPR(4);
423	+	dg.gen_se_16_32_T1();
424	+	dg.gen_load_T2_GPR(5);
425	+	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
426	+	compiled = true;
427	+	break;
428	+	case NATIVE_BITBLT:
429	+	dg.gen_load_T0_GPR(3);
430	+	dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
431	+	compiled = true;
432	+	break;
433	+	case NATIVE_INVRECT:
434	+	dg.gen_load_T0_GPR(3);
435	+	dg.gen_invoke_T0((void (*)(uint32))NQD_invrect);
436	+	compiled = true;
437	+	break;
438	+	case NATIVE_FILLRECT:
439	+	dg.gen_load_T0_GPR(3);
440	+	dg.gen_invoke_T0((void (*)(uint32))NQD_fillrect);
441	+	compiled = true;
442	+	break;
443	+	}
444	+	if (FN_field::test(opcode)) {
445	+	if (compiled) {
446	+	dg.gen_load_A0_LR();
447	+	dg.gen_set_PC_A0();
448	+	}
449	+	cg_context.done_compile = true;
450	+	}
451	+	else
452	+	cg_context.done_compile = false;
453	+	break;
454	+	}
455	+
456	+	default: {      // EMUL_OP
457	+	uint32 emul_op = EMUL_OP_field::extract(opcode) - 3;
458	+	#if ENABLE_NATIVE_EMUL_OP
459	+	typedef void (*emul_op_func_t)(dyngen_cpu_base);
460	+	emul_op_func_t emul_op_func = 0;
461	+	switch (emul_op) {
462	+	case OP_MICROSECONDS:
463	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_microseconds).ptr();
464	+	break;
465	+	case OP_IDLE_TIME:
466	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_1).ptr();
467	+	break;
468	+	case OP_IDLE_TIME_2:
469	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_2).ptr();
470	+	break;
471	+	}
472	+	if (emul_op_func) {
473	+	dg.gen_invoke_CPU(emul_op_func);
474	+	cg_context.done_compile = false;
475	+	compiled = true;
476	+	break;
477	+	}
478	+	#endif
479	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
480	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
481	+	dg.gen_invoke_CPU_im(func, emul_op);
482	+	cg_context.done_compile = false;
483	+	compiled = true;
484	+	break;
485	+	}
486		}
487	+	return compiled;
488	+	#endif
489	+	return false;
490		}
491
492		// Handle MacOS interrupt
#	Line 268 | Line 497 | void sheepshaver_cpu::interrupt(uint32 e
497		const clock_t interrupt_start = clock();
498		#endif
499
500	+	#if SAFE_INTERRUPT_PPC
501	+	static int depth = 0;
502	+	if (depth != 0)
503	+	printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
504	+	depth++;
505	+	#endif
506	+	#if SAFE_INTERRUPT_PPC >= 2
507	+	uint32 saved_regs[32];
508	+	memcpy(&saved_regs[0], &gpr(0), sizeof(saved_regs));
509	+	#endif
510	+
511		#if !MULTICORE_CPU
512		// Save program counters and branch registers
513		uint32 saved_pc = pc();
#	Line 325 | Line 565 | void sheepshaver_cpu::interrupt(uint32 e
565		#if EMUL_TIME_STATS
566		interrupt_time += (clock() - interrupt_start);
567		#endif
568	+
569	+	#if SAFE_INTERRUPT_PPC >= 2
570	+	if (memcmp(&saved_regs[0], &gpr(0), sizeof(saved_regs)) != 0)
571	+	printf("FATAL: dirty PowerPC registers\n");
572	+	#endif
573	+	#if SAFE_INTERRUPT_PPC
574	+	depth--;
575	+	#endif
576		}
577
578		// Execute 68k routine
#	Line 493 | Line 741 | inline void sheepshaver_cpu::execute_ppc
741		}
742
743		// Resource Manager thunk
496	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
497	–
744		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
745		{
746		uint32 type = gpr(3);
#	Line 604 | Line 850 | static sigsegv_return_t sigsegv_handler(
850		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
851		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
852
853	+	// Ignore writes to the zero page
854	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
855	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
856	+
857		// Ignore all other faults, if requested
858		if (PrefsFindBool("ignoresegv"))
859		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#	Line 860 | Line 1110 | static void NativeOp(int selector)
1110		GPR(3) = false;
1111		break;
1112		#endif
1113	+	case NATIVE_SYNC_HOOK:
1114	+	GPR(3) = NQD_sync_hook(GPR(3));
1115	+	break;
1116	+	case NATIVE_BITBLT_HOOK:
1117	+	GPR(3) = NQD_bitblt_hook(GPR(3));
1118	+	break;
1119	+	case NATIVE_BITBLT:
1120	+	NQD_bitblt(GPR(3));
1121	+	break;
1122	+	case NATIVE_FILLRECT_HOOK:
1123	+	GPR(3) = NQD_fillrect_hook(GPR(3));
1124	+	break;
1125	+	case NATIVE_INVRECT:
1126	+	NQD_invrect(GPR(3));
1127	+	break;
1128	+	case NATIVE_FILLRECT:
1129	+	NQD_fillrect(GPR(3));
1130	+	break;
1131		case NATIVE_SERIAL_NOTHING:
1132		case NATIVE_SERIAL_OPEN:
1133		case NATIVE_SERIAL_PRIME_IN:
#	Line 905 | Line 1173 | static void NativeOp(int selector)
1173		case NATIVE_MAKE_EXECUTABLE:
1174		MakeExecutable(0, (void *)GPR(4), GPR(5));
1175		break;
1176	+	case NATIVE_CHECK_LOAD_INVOC:
1177	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1178	+	break;
1179		default:
1180		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1181		QuitEmulator();

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