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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.17 by gbeauche, 2003-11-10T16:23:58Z vs.
Revision 1.40 by gbeauche, 2004-05-20T11:47:27Z

#	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 30 | Line 30
30		#include "sigsegv.h"
31		#include "cpu/ppc/ppc-cpu.hpp"
32		#include "cpu/ppc/ppc-operations.hpp"
33	+	#include "cpu/ppc/ppc-instructions.hpp"
34	+	#include "thunks.h"
35
36		// Used for NativeOp trampolines
37		#include "video.h"
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 71 | Line 75 | static void enter_mon(void)
75		#endif
76		}
77
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 86 | Line 102 | static void enter_mon(void)
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
111		// SIGSEGV handler
112		static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
113
114	+	#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
115	+	// Special trampolines for EmulOp and NativeOp
116	+	static uint8 *emul_op_trampoline;
117	+	static uint8 *native_op_trampoline;
118	+	#endif
119	+
120	+	// JIT Compiler enabled?
121	+	static inline bool enable_jit_p()
122	+	{
123	+	return PrefsFindBool("jit");
124	+	}
125	+
126
127		/**
128		*              PowerPC emulator glue with special 'sheep' opcodes
129		**/
130
131	+	enum {
132	+	PPC_I(SHEEP) = PPC_I(MAX),
133	+	PPC_I(SHEEP_MAX)
134	+	};
135	+
136		class sheepshaver_cpu
137		: public powerpc_cpu
138		{
139		void init_decoder();
140		void execute_sheep(uint32 opcode);
141
142	+	// Filter out EMUL_OP routines that only call native code
143	+	bool filter_execute_emul_op(uint32 emul_op);
144	+
145	+	// "Native" EMUL_OP routines
146	+	void execute_emul_op_microseconds();
147	+	void execute_emul_op_idle_time_1();
148	+	void execute_emul_op_idle_time_2();
149	+
150	+	// CPU context to preserve on interrupt
151	+	class interrupt_context {
152	+	uint32 gpr[32];
153	+	uint32 pc;
154	+	uint32 lr;
155	+	uint32 ctr;
156	+	uint32 cr;
157	+	uint32 xer;
158	+	sheepshaver_cpu *cpu;
159	+	const char *where;
160	+	public:
161	+	interrupt_context(sheepshaver_cpu *_cpu, const char *_where);
162	+	~interrupt_context();
163	+	};
164	+
165		public:
166
167		// Constructor
168		sheepshaver_cpu();
169
170	<	// Condition Register accessors
170	>	// CR & XER accessors
171		uint32 get_cr() const           { return cr().get(); }
172		void set_cr(uint32 v)           { cr().set(v); }
173	+	uint32 get_xer() const          { return xer().get(); }
174	+	void set_xer(uint32 v)          { xer().set(v); }
175	+
176	+	// Execute NATIVE_OP routine
177	+	void execute_native_op(uint32 native_op);
178
179	<	// Execution loop
180	<	void execute(uint32 entry, bool enable_cache = false);
179	>	// Execute EMUL_OP routine
180	>	void execute_emul_op(uint32 emul_op);
181
182		// Execute 68k routine
183		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 124 | Line 188 | public:
188		// Execute MacOS/PPC code
189		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
190
191	+	// Compile one instruction
192	+	virtual int compile1(codegen_context_t & cg_context);
193	+
194		// Resource manager thunk
195		void get_resource(uint32 old_get_resource);
196
#	Line 131 | Line 198 | public:
198		void interrupt(uint32 entry);
199		void handle_interrupt();
200
134	–	// Lazy memory allocator (one item at a time)
135	–	void *operator new(size_t size)
136	–	{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
137	–	void operator delete(void *p)
138	–	{ allocator_helper< sheepshaver_cpu, lazy_allocator >::deallocate(p); }
139	–	// FIXME: really make surre array allocation fail at link time?
140	–	void *operator new[](size_t);
141	–	void operator delete[](void *p);
142	–
201		// Make sure the SIGSEGV handler can access CPU registers
202		friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
203		};
204
205	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
205	>	// Memory allocator returning areas aligned on 16-byte boundaries
206	>	void *operator new(size_t size)
207	>	{
208	>	void *p;
209	>
210	>	#if defined(HAVE_POSIX_MEMALIGN)
211	>	if (posix_memalign(&p, 16, size) != 0)
212	>	throw std::bad_alloc();
213	>	#elif defined(HAVE_MEMALIGN)
214	>	p = memalign(16, size);
215	>	#elif defined(HAVE_VALLOC)
216	>	p = valloc(size); // page-aligned!
217	>	#else
218	>	/* XXX: handle padding ourselves */
219	>	p = malloc(size);
220	>	#endif
221	>
222	>	return p;
223	>	}
224	>
225	>	void operator delete(void *p)
226	>	{
227	>	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
228	>	#if defined(__GLIBC__)
229	>	// this is known to work only with GNU libc
230	>	free(p);
231	>	#endif
232	>	#else
233	>	free(p);
234	>	#endif
235	>	}
236
237		sheepshaver_cpu::sheepshaver_cpu()
238	<	: powerpc_cpu()
238	>	: powerpc_cpu(enable_jit_p())
239		{
240		init_decoder();
241		}
242
243		void sheepshaver_cpu::init_decoder()
244		{
157	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
158	–	static bool initialized = false;
159	–	if (initialized)
160	–	return;
161	–	initialized = true;
162	–	#endif
163	–
245		static const instr_info_t sheep_ii_table[] = {
246		{ "sheep",
247		(execute_pmf)&sheepshaver_cpu::execute_sheep,
248		NULL,
249	+	PPC_I(SHEEP),
250		D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
251		}
252		};
#	Line 178 | Line 260 | void sheepshaver_cpu::init_decoder()
260		}
261		}
262
181	–	// Forward declaration for native opcode handler
182	–	static void NativeOp(int selector);
183	–
263		/*              NativeOp instruction format:
264	<	+------------+--------------------------+--+----------+------------+
265	<	|      6     |                          |FN|    OP    |      2     |
266	<	+------------+--------------------------+--+----------+------------+
267	<	0         5 |6                       19 20 21      25 26        31
264	>	+------------+-------------------------+--+-----------+------------+
265	>	|      6     |                         |FN|    OP     |      2     |
266	>	+------------+-------------------------+--+-----------+------------+
267	>	0         5 |6                      18 19 20      25 26        31
268		*/
269
270	<	typedef bit_field< 20, 20 > FN_field;
271	<	typedef bit_field< 21, 25 > NATIVE_OP_field;
270	>	typedef bit_field< 19, 19 > FN_field;
271	>	typedef bit_field< 20, 25 > NATIVE_OP_field;
272		typedef bit_field< 26, 31 > EMUL_OP_field;
273
274	+	// "Native" EMUL_OP routines
275	+	#define GPR_A(REG) gpr(16 + (REG))
276	+	#define GPR_D(REG) gpr( 8 + (REG))
277	+
278	+	void sheepshaver_cpu::execute_emul_op_microseconds()
279	+	{
280	+	Microseconds(GPR_A(0), GPR_D(0));
281	+	}
282	+
283	+	void sheepshaver_cpu::execute_emul_op_idle_time_1()
284	+	{
285	+	// Sleep if no events pending
286	+	if (ReadMacInt32(0x14c) == 0)
287	+	Delay_usec(16667);
288	+	GPR_A(0) = ReadMacInt32(0x2b6);
289	+	}
290	+
291	+	void sheepshaver_cpu::execute_emul_op_idle_time_2()
292	+	{
293	+	// Sleep if no events pending
294	+	if (ReadMacInt32(0x14c) == 0)
295	+	Delay_usec(16667);
296	+	GPR_D(0) = (uint32)-2;
297	+	}
298	+
299	+	// Filter out EMUL_OP routines that only call native code
300	+	bool sheepshaver_cpu::filter_execute_emul_op(uint32 emul_op)
301	+	{
302	+	switch (emul_op) {
303	+	case OP_MICROSECONDS:
304	+	execute_emul_op_microseconds();
305	+	return true;
306	+	case OP_IDLE_TIME:
307	+	execute_emul_op_idle_time_1();
308	+	return true;
309	+	case OP_IDLE_TIME_2:
310	+	execute_emul_op_idle_time_2();
311	+	return true;
312	+	}
313	+	return false;
314	+	}
315	+
316	+	// Execute EMUL_OP routine
317	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
318	+	{
319	+	#if ENABLE_NATIVE_EMUL_OP
320	+	// First, filter out EMUL_OPs that can be executed without a mode switch
321	+	if (filter_execute_emul_op(emul_op))
322	+	return;
323	+	#endif
324	+
325	+	M68kRegisters r68;
326	+	WriteMacInt32(XLM_68K_R25, gpr(25));
327	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
328	+	for (int i = 0; i < 8; i++)
329	+	r68.d[i] = gpr(8 + i);
330	+	for (int i = 0; i < 7; i++)
331	+	r68.a[i] = gpr(16 + i);
332	+	r68.a[7] = gpr(1);
333	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
334	+	uint32 saved_xer = get_xer();
335	+	EmulOp(&r68, gpr(24), emul_op);
336	+	set_cr(saved_cr);
337	+	set_xer(saved_xer);
338	+	for (int i = 0; i < 8; i++)
339	+	gpr(8 + i) = r68.d[i];
340	+	for (int i = 0; i < 7; i++)
341	+	gpr(16 + i) = r68.a[i];
342	+	gpr(1) = r68.a[7];
343	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
344	+	}
345	+
346		// Execute SheepShaver instruction
347		void sheepshaver_cpu::execute_sheep(uint32 opcode)
348		{
#	Line 208 | Line 359 | void sheepshaver_cpu::execute_sheep(uint
359		break;
360
361		case 2:         // EXEC_NATIVE
362	<	NativeOp(NATIVE_OP_field::extract(opcode));
362	>	execute_native_op(NATIVE_OP_field::extract(opcode));
363		if (FN_field::test(opcode))
364		pc() = lr();
365		else
366		pc() += 4;
367		break;
368
369	<	default: {      // EMUL_OP
370	<	M68kRegisters r68;
220	<	WriteMacInt32(XLM_68K_R25, gpr(25));
221	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
222	<	for (int i = 0; i < 8; i++)
223	<	r68.d[i] = gpr(8 + i);
224	<	for (int i = 0; i < 7; i++)
225	<	r68.a[i] = gpr(16 + i);
226	<	r68.a[7] = gpr(1);
227	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
228	<	for (int i = 0; i < 8; i++)
229	<	gpr(8 + i) = r68.d[i];
230	<	for (int i = 0; i < 7; i++)
231	<	gpr(16 + i) = r68.a[i];
232	<	gpr(1) = r68.a[7];
233	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
369	>	default:        // EMUL_OP
370	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
371		pc() += 4;
372		break;
373		}
374	+	}
375	+
376	+	// Compile one instruction
377	+	int sheepshaver_cpu::compile1(codegen_context_t & cg_context)
378	+	{
379	+	#if PPC_ENABLE_JIT
380	+	const instr_info_t *ii = cg_context.instr_info;
381	+	if (ii->mnemo != PPC_I(SHEEP))
382	+	return COMPILE_FAILURE;
383	+
384	+	int status = COMPILE_FAILURE;
385	+	powerpc_dyngen & dg = cg_context.codegen;
386	+	uint32 opcode = cg_context.opcode;
387	+
388	+	switch (opcode & 0x3f) {
389	+	case 0:         // EMUL_RETURN
390	+	dg.gen_invoke(QuitEmulator);
391	+	status = COMPILE_CODE_OK;
392	+	break;
393	+
394	+	case 1:         // EXEC_RETURN
395	+	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
396	+	// Don't check for pending interrupts, we do know we have to
397	+	// get out of this block ASAP
398	+	dg.gen_exec_return();
399	+	status = COMPILE_EPILOGUE_OK;
400	+	break;
401	+
402	+	case 2: {       // EXEC_NATIVE
403	+	uint32 selector = NATIVE_OP_field::extract(opcode);
404	+	switch (selector) {
405	+	#if !PPC_REENTRANT_JIT
406	+	// Filter out functions that may invoke Execute68k() or
407	+	// CallMacOS(), this would break reentrancy as they could
408	+	// invalidate the translation cache and even overwrite
409	+	// continuation code when we are done with them.
410	+	case NATIVE_PATCH_NAME_REGISTRY:
411	+	dg.gen_invoke(DoPatchNameRegistry);
412	+	status = COMPILE_CODE_OK;
413	+	break;
414	+	case NATIVE_VIDEO_INSTALL_ACCEL:
415	+	dg.gen_invoke(VideoInstallAccel);
416	+	status = COMPILE_CODE_OK;
417	+	break;
418	+	case NATIVE_VIDEO_VBL:
419	+	dg.gen_invoke(VideoVBL);
420	+	status = COMPILE_CODE_OK;
421	+	break;
422	+	case NATIVE_GET_RESOURCE:
423	+	case NATIVE_GET_1_RESOURCE:
424	+	case NATIVE_GET_IND_RESOURCE:
425	+	case NATIVE_GET_1_IND_RESOURCE:
426	+	case NATIVE_R_GET_RESOURCE: {
427	+	static const uint32 get_resource_ptr[] = {
428	+	XLM_GET_RESOURCE,
429	+	XLM_GET_1_RESOURCE,
430	+	XLM_GET_IND_RESOURCE,
431	+	XLM_GET_1_IND_RESOURCE,
432	+	XLM_R_GET_RESOURCE
433	+	};
434	+	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
435	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
436	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
437	+	dg.gen_invoke_CPU_im(func, old_get_resource);
438	+	status = COMPILE_CODE_OK;
439	+	break;
440	+	}
441	+	case NATIVE_CHECK_LOAD_INVOC:
442	+	dg.gen_load_T0_GPR(3);
443	+	dg.gen_load_T1_GPR(4);
444	+	dg.gen_se_16_32_T1();
445	+	dg.gen_load_T2_GPR(5);
446	+	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
447	+	status = COMPILE_CODE_OK;
448	+	break;
449	+	#endif
450	+	case NATIVE_DISABLE_INTERRUPT:
451	+	dg.gen_invoke(DisableInterrupt);
452	+	status = COMPILE_CODE_OK;
453	+	break;
454	+	case NATIVE_ENABLE_INTERRUPT:
455	+	dg.gen_invoke(EnableInterrupt);
456	+	status = COMPILE_CODE_OK;
457	+	break;
458	+	case NATIVE_BITBLT:
459	+	dg.gen_load_T0_GPR(3);
460	+	dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
461	+	status = COMPILE_CODE_OK;
462	+	break;
463	+	case NATIVE_INVRECT:
464	+	dg.gen_load_T0_GPR(3);
465	+	dg.gen_invoke_T0((void (*)(uint32))NQD_invrect);
466	+	status = COMPILE_CODE_OK;
467	+	break;
468	+	case NATIVE_FILLRECT:
469	+	dg.gen_load_T0_GPR(3);
470	+	dg.gen_invoke_T0((void (*)(uint32))NQD_fillrect);
471	+	status = COMPILE_CODE_OK;
472	+	break;
473	+	}
474	+	// Could we fully translate this NativeOp?
475	+	if (FN_field::test(opcode)) {
476	+	if (status != COMPILE_FAILURE) {
477	+	dg.gen_load_A0_LR();
478	+	dg.gen_set_PC_A0();
479	+	}
480	+	cg_context.done_compile = true;
481	+	break;
482	+	}
483	+	else if (status != COMPILE_FAILURE) {
484	+	cg_context.done_compile = false;
485	+	break;
486	+	}
487	+	#if PPC_REENTRANT_JIT
488	+	// Try to execute NativeOp trampoline
489	+	dg.gen_set_PC_im(cg_context.pc + 4);
490	+	dg.gen_mov_32_T0_im(selector);
491	+	dg.gen_jmp(native_op_trampoline);
492	+	cg_context.done_compile = true;
493	+	status = COMPILE_EPILOGUE_OK;
494	+	break;
495	+	#endif
496	+	// Invoke NativeOp handler
497	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
498	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_native_op).ptr();
499	+	dg.gen_invoke_CPU_im(func, selector);
500	+	cg_context.done_compile = false;
501	+	status = COMPILE_CODE_OK;
502	+	break;
503	+	}
504	+
505	+	default: {      // EMUL_OP
506	+	uint32 emul_op = EMUL_OP_field::extract(opcode) - 3;
507	+	#if ENABLE_NATIVE_EMUL_OP
508	+	typedef void (*emul_op_func_t)(dyngen_cpu_base);
509	+	emul_op_func_t emul_op_func = 0;
510	+	switch (emul_op) {
511	+	case OP_MICROSECONDS:
512	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_microseconds).ptr();
513	+	break;
514	+	case OP_IDLE_TIME:
515	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_1).ptr();
516	+	break;
517	+	case OP_IDLE_TIME_2:
518	+	emul_op_func = (emul_op_func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op_idle_time_2).ptr();
519	+	break;
520	+	}
521	+	if (emul_op_func) {
522	+	dg.gen_invoke_CPU(emul_op_func);
523	+	cg_context.done_compile = false;
524	+	status = COMPILE_CODE_OK;
525	+	break;
526	+	}
527	+	#endif
528	+	#if PPC_REENTRANT_JIT
529	+	// Try to execute EmulOp trampoline
530	+	dg.gen_set_PC_im(cg_context.pc + 4);
531	+	dg.gen_mov_32_T0_im(emul_op);
532	+	dg.gen_jmp(emul_op_trampoline);
533	+	cg_context.done_compile = true;
534	+	status = COMPILE_EPILOGUE_OK;
535	+	break;
536	+	#endif
537	+	// Invoke EmulOp handler
538	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
539	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
540	+	dg.gen_invoke_CPU_im(func, emul_op);
541	+	cg_context.done_compile = false;
542	+	status = COMPILE_CODE_OK;
543	+	break;
544		}
545	+	}
546	+	return status;
547	+	#endif
548	+	return COMPILE_FAILURE;
549	+	}
550	+
551	+	// CPU context to preserve on interrupt
552	+	sheepshaver_cpu::interrupt_context::interrupt_context(sheepshaver_cpu *_cpu, const char *_where)
553	+	{
554	+	#if SAFE_INTERRUPT_PPC >= 2
555	+	cpu = _cpu;
556	+	where = _where;
557	+
558	+	// Save interrupt context
559	+	memcpy(&gpr[0], &cpu->gpr(0), sizeof(gpr));
560	+	pc = cpu->pc();
561	+	lr = cpu->lr();
562	+	ctr = cpu->ctr();
563	+	cr = cpu->get_cr();
564	+	xer = cpu->get_xer();
565	+	#endif
566		}
567
568	<	// Execution loop
241	<	void sheepshaver_cpu::execute(uint32 entry, bool enable_cache)
568	>	sheepshaver_cpu::interrupt_context::~interrupt_context()
569		{
570	<	powerpc_cpu::execute(entry, enable_cache);
570	>	#if SAFE_INTERRUPT_PPC >= 2
571	>	// Check whether CPU context was preserved by interrupt
572	>	if (memcmp(&gpr[0], &cpu->gpr(0), sizeof(gpr)) != 0) {
573	>	printf("FATAL: %s: interrupt clobbers registers\n", where);
574	>	for (int i = 0; i < 32; i++)
575	>	if (gpr[i] != cpu->gpr(i))
576	>	printf(" r%d: %08x -> %08x\n", i, gpr[i], cpu->gpr(i));
577	>	}
578	>	if (pc != cpu->pc())
579	>	printf("FATAL: %s: interrupt clobbers PC\n", where);
580	>	if (lr != cpu->lr())
581	>	printf("FATAL: %s: interrupt clobbers LR\n", where);
582	>	if (ctr != cpu->ctr())
583	>	printf("FATAL: %s: interrupt clobbers CTR\n", where);
584	>	if (cr != cpu->get_cr())
585	>	printf("FATAL: %s: interrupt clobbers CR\n", where);
586	>	if (xer != cpu->get_xer())
587	>	printf("FATAL: %s: interrupt clobbers XER\n", where);
588	>	#endif
589		}
590
591		// Handle MacOS interrupt
#	Line 251 | Line 596 | void sheepshaver_cpu::interrupt(uint32 e
596		const clock_t interrupt_start = clock();
597		#endif
598
599	+	#if SAFE_INTERRUPT_PPC
600	+	static int depth = 0;
601	+	if (depth != 0)
602	+	printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
603	+	depth++;
604	+	#endif
605	+
606		#if !MULTICORE_CPU
607		// Save program counters and branch registers
608		uint32 saved_pc = pc();
#	Line 260 | Line 612 | void sheepshaver_cpu::interrupt(uint32 e
612		#endif
613
614		// Initialize stack pointer to SheepShaver alternate stack base
615	<	gpr(1) = SheepStack1Base - 64;
615	>	gpr(1) = SignalStackBase() - 64;
616
617		// Build trampoline to return from interrupt
618	<	uint32 trampoline[] = { htonl(POWERPC_EMUL_OP | 1) };
618	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
619
620		// Prepare registers for nanokernel interrupt routine
621		kernel_data->v[0x004 >> 2] = htonl(gpr(1));
#	Line 282 | Line 634 | void sheepshaver_cpu::interrupt(uint32 e
634		gpr(1)  = KernelDataAddr;
635		gpr(7)  = ntohl(kernel_data->v[0x660 >> 2]);
636		gpr(8)  = 0;
637	<	gpr(10) = (uint32)trampoline;
638	<	gpr(12) = (uint32)trampoline;
637	>	gpr(10) = trampoline.addr();
638	>	gpr(12) = trampoline.addr();
639		gpr(13) = get_cr();
640
641		// rlwimi. r7,r7,8,0,0
#	Line 308 | Line 660 | void sheepshaver_cpu::interrupt(uint32 e
660		#if EMUL_TIME_STATS
661		interrupt_time += (clock() - interrupt_start);
662		#endif
663	+
664	+	#if SAFE_INTERRUPT_PPC
665	+	depth--;
666	+	#endif
667		}
668
669		// Execute 68k routine
#	Line 420 | Line 776 | uint32 sheepshaver_cpu::execute_macos_co
776		uint32 saved_ctr= ctr();
777
778		// Build trampoline with EXEC_RETURN
779	<	uint32 trampoline[] = { htonl(POWERPC_EMUL_OP | 1) };
780	<	lr() = (uint32)trampoline;
779	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
780	>	lr() = trampoline.addr();
781
782		gpr(1) -= 64;                                                           // Create stack frame
783		uint32 proc = ReadMacInt32(tvect);                      // Get routine address
#	Line 465 | Line 821 | inline void sheepshaver_cpu::execute_ppc
821		// Save branch registers
822		uint32 saved_lr = lr();
823
824	<	const uint32 trampoline[] = { htonl(POWERPC_EMUL_OP | 1) };
825	<	lr() = (uint32)trampoline;
824	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
825	>	WriteMacInt32(trampoline.addr(), POWERPC_EXEC_RETURN);
826	>	lr() = trampoline.addr();
827
828		execute(entry);
829
#	Line 475 | Line 832 | inline void sheepshaver_cpu::execute_ppc
832		}
833
834		// Resource Manager thunk
478	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
479	–
835		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
836		{
837		uint32 type = gpr(3);
#	Line 586 | Line 941 | static sigsegv_return_t sigsegv_handler(
941		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
942		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
943
944	+	// Ignore writes to the zero page
945	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
946	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
947	+
948		// Ignore all other faults, if requested
949		if (PrefsFindBool("ignoresegv"))
950		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#	Line 611 | Line 970 | void init_emul_ppc(void)
970		// Initialize main CPU emulator
971		main_cpu = new sheepshaver_cpu();
972		main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
973	+	main_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
974		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
975
976		#if MULTICORE_CPU
#	Line 668 | Line 1028 | void exit_emul_ppc(void)
1028		#endif
1029		}
1030
1031	+	#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT
1032	+	// Initialize EmulOp trampolines
1033	+	void init_emul_op_trampolines(basic_dyngen & dg)
1034	+	{
1035	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
1036	+	func_t func;
1037	+
1038	+	// EmulOp
1039	+	emul_op_trampoline = dg.gen_start();
1040	+	func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
1041	+	dg.gen_invoke_CPU_T0(func);
1042	+	dg.gen_exec_return();
1043	+	dg.gen_end();
1044	+
1045	+	// NativeOp
1046	+	native_op_trampoline = dg.gen_start();
1047	+	func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_native_op).ptr();
1048	+	dg.gen_invoke_CPU_T0(func);
1049	+	dg.gen_exec_return();
1050	+	dg.gen_end();
1051	+
1052	+	D(bug("EmulOp trampoline:   %p\n", emul_op_trampoline));
1053	+	D(bug("NativeOp trampoline: %p\n", native_op_trampoline));
1054	+	}
1055	+	#endif
1056	+
1057		/*
1058		*  Emulation loop
1059		*/
#	Line 675 | Line 1061 | void exit_emul_ppc(void)
1061		void emul_ppc(uint32 entry)
1062		{
1063		current_cpu = main_cpu;
1064	<	#if DEBUG
1064	>	#if 0
1065		current_cpu->start_log();
1066		#endif
1067		// start emulation loop and enable code translation or caching
1068	<	current_cpu->execute(entry, true);
1068	>	current_cpu->execute(entry);
1069		}
1070
1071		/*
#	Line 714 | Line 1100 | void sheepshaver_cpu::handle_interrupt(v
1100		if (InterruptFlags == 0)
1101		return;
1102
1103	+	// Current interrupt nest level
1104	+	static int interrupt_depth = 0;
1105	+	++interrupt_depth;
1106	+
1107		// Disable MacOS stack sniffer
1108		WriteMacInt32(0x110, 0);
1109
#	Line 730 | Line 1120 | void sheepshaver_cpu::handle_interrupt(v
1120		case MODE_NATIVE:
1121		// 68k emulator inactive, in nanokernel?
1122		assert(current_cpu == main_cpu);
1123	<	if (gpr(1) != KernelDataAddr) {
1123	>	if (gpr(1) != KernelDataAddr && interrupt_depth == 1) {
1124	>	interrupt_context ctx(this, "PowerPC mode");
1125	>
1126		// Prepare for 68k interrupt level 1
1127		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
1128		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 753 | Line 1145 | void sheepshaver_cpu::handle_interrupt(v
1145		case MODE_EMUL_OP:
1146		// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
1147		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1148	+	interrupt_context ctx(this, "68k mode");
1149		#if 1
1150		// Execute full 68k interrupt routine
1151		M68kRegisters r;
#	Line 774 | Line 1167 | void sheepshaver_cpu::handle_interrupt(v
1167		if (InterruptFlags & INTFLAG_VIA) {
1168		ClearInterruptFlag(INTFLAG_VIA);
1169		ADBInterrupt();
1170	<	ExecutePPC(VideoVBL);
1170	>	ExecuteNative(NATIVE_VIDEO_VBL);
1171		}
1172		}
1173		#endif
#	Line 782 | Line 1175 | void sheepshaver_cpu::handle_interrupt(v
1175		break;
1176		#endif
1177		}
785	–	}
786	–
787	–	/*
788	–	*  Execute NATIVE_OP opcode (called by PowerPC emulator)
789	–	*/
790	–
791	–	#define POWERPC_NATIVE_OP_INIT(LR, OP) \
792	–	tswap32(POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2)
1178
1179	<	// FIXME: Make sure 32-bit relocations are used
1180	<	const uint32 NativeOpTable[NATIVE_OP_MAX] = {
1181	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_PATCH_NAME_REGISTRY),
797	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_INSTALL_ACCEL),
798	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_VBL),
799	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_DO_DRIVER_IO),
800	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_IRQ),
801	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_INIT),
802	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_TERM),
803	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_OPEN),
804	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_CLOSE),
805	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_WPUT),
806	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_RSRV),
807	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_NOTHING),
808	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_OPEN),
809	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_IN),
810	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_OUT),
811	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CONTROL),
812	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_STATUS),
813	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CLOSE),
814	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_RESOURCE),
815	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_RESOURCE),
816	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_IND_RESOURCE),
817	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_IND_RESOURCE),
818	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_R_GET_RESOURCE),
819	<	POWERPC_NATIVE_OP_INIT(0, NATIVE_DISABLE_INTERRUPT),
820	<	POWERPC_NATIVE_OP_INIT(0, NATIVE_ENABLE_INTERRUPT),
821	<	POWERPC_NATIVE_OP_INIT(1, NATIVE_MAKE_EXECUTABLE),
822	<	};
1179	>	// We are done with this interrupt
1180	>	--interrupt_depth;
1181	>	}
1182
1183		static void get_resource(void);
1184		static void get_1_resource(void);
#	Line 827 | Line 1186 | static void get_ind_resource(void);
1186		static void get_1_ind_resource(void);
1187		static void r_get_resource(void);
1188
1189	<	#define GPR(REG) current_cpu->gpr(REG)
1190	<
832	<	static void NativeOp(int selector)
1189	>	// Execute NATIVE_OP routine
1190	>	void sheepshaver_cpu::execute_native_op(uint32 selector)
1191		{
1192		#if EMUL_TIME_STATS
1193		native_exec_count++;
#	Line 847 | Line 1205 | static void NativeOp(int selector)
1205		VideoVBL();
1206		break;
1207		case NATIVE_VIDEO_DO_DRIVER_IO:
1208	<	GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
1209	<	(void *)GPR(5), GPR(6), GPR(7));
1208	>	gpr(3) = (int32)(int16)VideoDoDriverIO((void *)gpr(3), (void *)gpr(4),
1209	>	(void *)gpr(5), gpr(6), gpr(7));
1210		break;
1211		#ifdef WORDS_BIGENDIAN
1212		case NATIVE_ETHER_IRQ:
1213		EtherIRQ();
1214		break;
1215		case NATIVE_ETHER_INIT:
1216	<	GPR(3) = InitStreamModule((void *)GPR(3));
1216	>	gpr(3) = InitStreamModule((void *)gpr(3));
1217		break;
1218		case NATIVE_ETHER_TERM:
1219		TerminateStreamModule();
1220		break;
1221		case NATIVE_ETHER_OPEN:
1222	<	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
1222	>	gpr(3) = ether_open((queue_t *)gpr(3), (void *)gpr(4), gpr(5), gpr(6), (void*)gpr(7));
1223		break;
1224		case NATIVE_ETHER_CLOSE:
1225	<	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
1225	>	gpr(3) = ether_close((queue_t *)gpr(3), gpr(4), (void *)gpr(5));
1226		break;
1227		case NATIVE_ETHER_WPUT:
1228	<	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
1228	>	gpr(3) = ether_wput((queue_t *)gpr(3), (mblk_t *)gpr(4));
1229		break;
1230		case NATIVE_ETHER_RSRV:
1231	<	GPR(3) = ether_rsrv((queue_t *)GPR(3));
1231	>	gpr(3) = ether_rsrv((queue_t *)gpr(3));
1232		break;
1233		#else
1234		case NATIVE_ETHER_INIT:
1235		// FIXME: needs more complicated thunks
1236	<	GPR(3) = false;
1236	>	gpr(3) = false;
1237		break;
1238		#endif
1239	+	case NATIVE_SYNC_HOOK:
1240	+	gpr(3) = NQD_sync_hook(gpr(3));
1241	+	break;
1242	+	case NATIVE_BITBLT_HOOK:
1243	+	gpr(3) = NQD_bitblt_hook(gpr(3));
1244	+	break;
1245	+	case NATIVE_BITBLT:
1246	+	NQD_bitblt(gpr(3));
1247	+	break;
1248	+	case NATIVE_FILLRECT_HOOK:
1249	+	gpr(3) = NQD_fillrect_hook(gpr(3));
1250	+	break;
1251	+	case NATIVE_INVRECT:
1252	+	NQD_invrect(gpr(3));
1253	+	break;
1254	+	case NATIVE_FILLRECT:
1255	+	NQD_fillrect(gpr(3));
1256	+	break;
1257		case NATIVE_SERIAL_NOTHING:
1258		case NATIVE_SERIAL_OPEN:
1259		case NATIVE_SERIAL_PRIME_IN:
#	Line 895 | Line 1271 | static void NativeOp(int selector)
1271		SerialStatus,
1272		SerialClose
1273		};
1274	<	GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
1274	>	gpr(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](gpr(3), gpr(4));
1275		break;
1276		}
1277		case NATIVE_GET_RESOURCE:
#	Line 905 | Line 1281 | static void NativeOp(int selector)
1281		case NATIVE_R_GET_RESOURCE: {
1282		typedef void (*GetResourceCallback)(void);
1283		static const GetResourceCallback get_resource_callbacks[] = {
1284	<	get_resource,
1285	<	get_1_resource,
1286	<	get_ind_resource,
1287	<	get_1_ind_resource,
1288	<	r_get_resource
1284	>	::get_resource,
1285	>	::get_1_resource,
1286	>	::get_ind_resource,
1287	>	::get_1_ind_resource,
1288	>	::r_get_resource
1289		};
1290		get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
1291		break;
#	Line 921 | Line 1297 | static void NativeOp(int selector)
1297		EnableInterrupt();
1298		break;
1299		case NATIVE_MAKE_EXECUTABLE:
1300	<	MakeExecutable(0, (void *)GPR(4), GPR(5));
1300	>	MakeExecutable(0, (void *)gpr(4), gpr(5));
1301	>	break;
1302	>	case NATIVE_CHECK_LOAD_INVOC:
1303	>	check_load_invoc(gpr(3), gpr(4), gpr(5));
1304		break;
1305		default:
1306		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
#	Line 935 | Line 1314 | static void NativeOp(int selector)
1314		}
1315
1316		/*
938	–	*  Execute native subroutine (LR must contain return address)
939	–	*/
940	–
941	–	void ExecuteNative(int selector)
942	–	{
943	–	uint32 tvect[2];
944	–	tvect[0] = tswap32(POWERPC_NATIVE_OP_FUNC(selector));
945	–	tvect[1] = 0; // Fake TVECT
946	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
947	–	M68kRegisters r;
948	–	Execute68k((uint32)&desc, &r);
949	–	}
950	–
951	–	/*
1317		*  Execute 68k subroutine (must be ended with EXEC_RETURN)
1318		*  This must only be called by the emul_thread when in EMUL_OP mode
1319		*  r->a[7] is unused, the routine runs on the caller's stack
#	Line 966 | Line 1331 | void Execute68k(uint32 pc, M68kRegisters
1331
1332		void Execute68kTrap(uint16 trap, M68kRegisters *r)
1333		{
1334	<	uint16 proc[2];
1335	<	proc[0] = htons(trap);
1336	<	proc[1] = htons(M68K_RTS);
1337	<	Execute68k((uint32)proc, r);
1334	>	SheepVar proc_var(4);
1335	>	uint32 proc = proc_var.addr();
1336	>	WriteMacInt16(proc, trap);
1337	>	WriteMacInt16(proc + 2, M68K_RTS);
1338	>	Execute68k(proc, r);
1339		}
1340
1341		/*

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