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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.24 by gbeauche, 2003-12-25T23:54:36Z vs.
Revision 1.35 by gbeauche, 2004-04-22T22:54:47Z

#	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 76 | Line 77 | static void enter_mon(void)
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 133 | Line 137 | public:
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);
145
#	Line 142 | 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 149 | Line 159 | public:
159		void interrupt(uint32 entry);
160		void handle_interrupt();
161
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	–
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 172 | Line 203 | sheepshaver_cpu::sheepshaver_cpu()
203
204		void sheepshaver_cpu::init_decoder()
205		{
175	–	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
176	–	static bool initialized = false;
177	–	if (initialized)
178	–	return;
179	–	initialized = true;
180	–	#endif
181	–
206		static const instr_info_t sheep_ii_table[] = {
207		{ "sheep",
208		(execute_pmf)&sheepshaver_cpu::execute_sheep,
#	Line 201 | Line 225 | void sheepshaver_cpu::init_decoder()
225		static void NativeOp(int selector);
226
227		/*              NativeOp instruction format:
228	<	+------------+--------------------------+--+----------+------------+
229	<	|      6     |                          |FN|    OP    |      2     |
230	<	+------------+--------------------------+--+----------+------------+
231	<	0         5 |6                       19 20 21      25 26        31
228	>	+------------+-------------------------+--+-----------+------------+
229	>	|      6     |                         |FN|    OP     |      2     |
230	>	+------------+-------------------------+--+-----------+------------+
231	>	0         5 |6                      18 19 20      25 26        31
232		*/
233
234	<	typedef bit_field< 20, 20 > FN_field;
235	<	typedef bit_field< 21, 25 > NATIVE_OP_field;
234	>	typedef bit_field< 19, 19 > FN_field;
235	>	typedef bit_field< 20, 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 234 | Line 282 | void sheepshaver_cpu::execute_sheep(uint
282		pc() += 4;
283		break;
284
285	<	default: {      // EMUL_OP
286	<	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);
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	+	case NATIVE_BITBLT:
366	+	dg.gen_load_T0_GPR(3);
367	+	dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
368	+	compiled = true;
369	+	break;
370	+	case NATIVE_INVRECT:
371	+	dg.gen_load_T0_GPR(3);
372	+	dg.gen_invoke_T0((void (*)(uint32))NQD_invrect);
373	+	compiled = true;
374	+	break;
375	+	case NATIVE_FILLRECT:
376	+	dg.gen_load_T0_GPR(3);
377	+	dg.gen_invoke_T0((void (*)(uint32))NQD_fillrect);
378	+	compiled = true;
379	+	break;
380	+	}
381	+	if (FN_field::test(opcode)) {
382	+	if (compiled) {
383	+	dg.gen_load_A0_LR();
384	+	dg.gen_set_PC_A0();
385	+	}
386	+	cg_context.done_compile = true;
387	+	}
388	+	else
389	+	cg_context.done_compile = false;
390	+	break;
391		}
392	+
393	+	default: {      // EMUL_OP
394	+	typedef void (*func_t)(dyngen_cpu_base, uint32);
395	+	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
396	+	dg.gen_invoke_CPU_im(func, EMUL_OP_field::extract(opcode) - 3);
397	+	cg_context.done_compile = false;
398	+	compiled = true;
399	+	break;
400	+	}
401	+	}
402	+	return compiled;
403	+	#endif
404	+	return false;
405		}
406
407		// Handle MacOS interrupt
#	Line 493 | Line 637 | inline void sheepshaver_cpu::execute_ppc
637		}
638
639		// Resource Manager thunk
496	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
497	–
640		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
641		{
642		uint32 type = gpr(3);
#	Line 604 | Line 746 | static sigsegv_return_t sigsegv_handler(
746		else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
747		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
748
749	+	// Ignore writes to the zero page
750	+	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
751	+	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
752	+
753		// Ignore all other faults, if requested
754		if (PrefsFindBool("ignoresegv"))
755		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
#	Line 860 | Line 1006 | static void NativeOp(int selector)
1006		GPR(3) = false;
1007		break;
1008		#endif
1009	+	case NATIVE_SYNC_HOOK:
1010	+	GPR(3) = NQD_sync_hook(GPR(3));
1011	+	break;
1012	+	case NATIVE_BITBLT_HOOK:
1013	+	GPR(3) = NQD_bitblt_hook(GPR(3));
1014	+	break;
1015	+	case NATIVE_BITBLT:
1016	+	NQD_bitblt(GPR(3));
1017	+	break;
1018	+	case NATIVE_FILLRECT_HOOK:
1019	+	GPR(3) = NQD_fillrect_hook(GPR(3));
1020	+	break;
1021	+	case NATIVE_INVRECT:
1022	+	NQD_invrect(GPR(3));
1023	+	break;
1024	+	case NATIVE_FILLRECT:
1025	+	NQD_fillrect(GPR(3));
1026	+	break;
1027		case NATIVE_SERIAL_NOTHING:
1028		case NATIVE_SERIAL_OPEN:
1029		case NATIVE_SERIAL_PRIME_IN:
#	Line 905 | Line 1069 | static void NativeOp(int selector)
1069		case NATIVE_MAKE_EXECUTABLE:
1070		MakeExecutable(0, (void *)GPR(4), GPR(5));
1071		break;
1072	+	case NATIVE_CHECK_LOAD_INVOC:
1073	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1074	+	break;
1075		default:
1076		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1077		QuitEmulator();

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