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

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.3 by gbeauche, 2003-09-29T07:05:15Z vs.
Revision 1.36 by gbeauche, 2004-05-12T15:54:23Z

#	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 28 | Line 28
28		#include "macos_util.h"
29		#include "block-alloc.hpp"
30		#include "sigsegv.h"
31	–	#include "spcflags.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
42		#include <stdio.h>
43	+	#include <stdlib.h>
44
45		#if ENABLE_MON
46		#include "mon.h"
47		#include "mon_disass.h"
48		#endif
49
50	<	#define DEBUG 1
50	>	#define DEBUG 0
51		#include "debug.h"
52
53	+	// Emulation time statistics
54	+	#define EMUL_TIME_STATS 1
55	+
56	+	#if EMUL_TIME_STATS
57	+	static clock_t emul_start_time;
58	+	static uint32 interrupt_count = 0;
59	+	static clock_t interrupt_time = 0;
60	+	static uint32 exec68k_count = 0;
61	+	static clock_t exec68k_time = 0;
62	+	static uint32 native_exec_count = 0;
63	+	static clock_t native_exec_time = 0;
64	+	static uint32 macos_exec_count = 0;
65	+	static clock_t macos_exec_time = 0;
66	+	#endif
67	+
68		static void enter_mon(void)
69		{
70		// Start up mon in real-mode
#	Line 56 | 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	+
86		// Enable multicore (main/interrupts) cpu emulation?
87	<	#define MULTICORE_CPU 0
87	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
88	>
89	>	// Enable interrupt routine safety checks?
90	>	#define SAFE_INTERRUPT_PPC 1
91
92		// Enable Execute68k() safety checks?
93		#define SAFE_EXEC_68K 1
#	Line 71 | Line 101 | static void enter_mon(void)
101		// Interrupts in native mode?
102		#define INTERRUPTS_IN_NATIVE_MODE 1
103
104	<	// 68k Emulator Data
105	<	struct EmulatorData {
76	<	uint32  v[0x400];
77	<	};
104	>	// Pointer to Kernel Data
105	>	static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
106
107	<	// Kernel Data
108	<	struct KernelData {
81	<	uint32  v[0x400];
82	<	EmulatorData ed;
83	<	};
107	>	// SIGSEGV handler
108	>	static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
109
110	<	// Pointer to Kernel Data
111	<	static KernelData * const kernel_data = (KernelData *)0x68ffe000;
110	>	// JIT Compiler enabled?
111	>	static inline bool enable_jit_p()
112	>	{
113	>	return PrefsFindBool("jit");
114	>	}
115
116
117		/**
118		*              PowerPC emulator glue with special 'sheep' opcodes
119		**/
120
121	<	struct sheepshaver_exec_return { };
121	>	enum {
122	>	PPC_I(SHEEP) = PPC_I(MAX),
123	>	PPC_I(SHEEP_MAX)
124	>	};
125
126		class sheepshaver_cpu
127		: public powerpc_cpu
#	Line 100 | Line 131 | class sheepshaver_cpu
131
132		public:
133
134	<	sheepshaver_cpu()
135	<	: powerpc_cpu()
105	<	{ init_decoder(); }
134	>	// Constructor
135	>	sheepshaver_cpu();
136
137	<	// Condition Register accessors
137	>	// CR & XER accessors
138		uint32 get_cr() const           { return cr().get(); }
139		void set_cr(uint32 v)           { cr().set(v); }
140	+	uint32 get_xer() const          { return xer().get(); }
141	+	void set_xer(uint32 v)          { xer().set(v); }
142
143	<	// Execution loop
144	<	void execute(uint32 pc);
143	>	// Execute EMUL_OP routine
144	>	void execute_emul_op(uint32 emul_op);
145
146		// Execute 68k routine
147		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 120 | Line 152 | public:
152		// Execute MacOS/PPC code
153		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
154
155	+	// Compile one instruction
156	+	virtual bool compile1(codegen_context_t & cg_context);
157	+
158		// Resource manager thunk
159		void get_resource(uint32 old_get_resource);
160
161		// Handle MacOS interrupt
162	<	void interrupt(uint32 entry, sheepshaver_cpu *cpu);
163	<
129	<	// spcflags for interrupts handling
130	<	static uint32 spcflags;
162	>	void interrupt(uint32 entry);
163	>	void handle_interrupt();
164
165	<	// Lazy memory allocator (one item at a time)
166	<	void *operator new(size_t size)
134	<	{ return allocator_helper< sheepshaver_cpu, lazy_allocator >::allocate(); }
135	<	void operator delete(void *p)
136	<	{ allocator_helper< sheepshaver_cpu, lazy_allocator >::deallocate(p); }
137	<	// FIXME: really make surre array allocation fail at link time?
138	<	void *operator new[](size_t);
139	<	void operator delete[](void *p);
165	>	// Make sure the SIGSEGV handler can access CPU registers
166	>	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
167		};
168
169	<	uint32 sheepshaver_cpu::spcflags = 0;
170	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
169	>	// Memory allocator returning areas aligned on 16-byte boundaries
170	>	void *operator new(size_t size)
171	>	{
172	>	void *p;
173
174	<	void sheepshaver_cpu::init_decoder()
174	>	#if defined(HAVE_POSIX_MEMALIGN)
175	>	if (posix_memalign(&p, 16, size) != 0)
176	>	throw std::bad_alloc();
177	>	#elif defined(HAVE_MEMALIGN)
178	>	p = memalign(16, size);
179	>	#elif defined(HAVE_VALLOC)
180	>	p = valloc(size); // page-aligned!
181	>	#else
182	>	/* XXX: handle padding ourselves */
183	>	p = malloc(size);
184	>	#endif
185	>
186	>	return p;
187	>	}
188	>
189	>	void operator delete(void *p)
190		{
191	<	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
192	<	static bool initialized = false;
193	<	if (initialized)
194	<	return;
195	<	initialized = true;
191	>	#if defined(HAVE_MEMALIGN) || defined(HAVE_VALLOC)
192	>	#if defined(__GLIBC__)
193	>	// this is known to work only with GNU libc
194	>	free(p);
195	>	#endif
196	>	#else
197	>	free(p);
198		#endif
199	+	}
200
201	+	sheepshaver_cpu::sheepshaver_cpu()
202	+	: powerpc_cpu(enable_jit_p())
203	+	{
204	+	init_decoder();
205	+	}
206	+
207	+	void sheepshaver_cpu::init_decoder()
208	+	{
209		static const instr_info_t sheep_ii_table[] = {
210		{ "sheep",
211	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
211	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
212		NULL,
213	<	D_form, 6, 0, CFLOW_TRAP
213	>	PPC_I(SHEEP),
214	>	D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
215		}
216		};
217
#	Line 172 | Line 228 | void sheepshaver_cpu::init_decoder()
228		static void NativeOp(int selector);
229
230		/*              NativeOp instruction format:
231	<	+------------+--------------------------+--+----------+------------+
232	<	|      6     |                          |FN|    OP    |      2     |
233	<	+------------+--------------------------+--+----------+------------+
234	<	0         5 |6                       19 20 21      25 26        31
231	>	+------------+-------------------------+--+-----------+------------+
232	>	|      6     |                         |FN|    OP     |      2     |
233	>	+------------+-------------------------+--+-----------+------------+
234	>	0         5 |6                      18 19 20      25 26        31
235		*/
236
237	<	typedef bit_field< 20, 20 > FN_field;
238	<	typedef bit_field< 21, 25 > NATIVE_OP_field;
237	>	typedef bit_field< 19, 19 > FN_field;
238	>	typedef bit_field< 20, 25 > NATIVE_OP_field;
239		typedef bit_field< 26, 31 > EMUL_OP_field;
240
241	+	// Execute EMUL_OP routine
242	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
243	+	{
244	+	M68kRegisters r68;
245	+	WriteMacInt32(XLM_68K_R25, gpr(25));
246	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
247	+	for (int i = 0; i < 8; i++)
248	+	r68.d[i] = gpr(8 + i);
249	+	for (int i = 0; i < 7; i++)
250	+	r68.a[i] = gpr(16 + i);
251	+	r68.a[7] = gpr(1);
252	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
253	+	uint32 saved_xer = get_xer();
254	+	EmulOp(&r68, gpr(24), emul_op);
255	+	set_cr(saved_cr);
256	+	set_xer(saved_xer);
257	+	for (int i = 0; i < 8; i++)
258	+	gpr(8 + i) = r68.d[i];
259	+	for (int i = 0; i < 7; i++)
260	+	gpr(16 + i) = r68.a[i];
261	+	gpr(1) = r68.a[7];
262	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
263	+	}
264	+
265		// Execute SheepShaver instruction
266		void sheepshaver_cpu::execute_sheep(uint32 opcode)
267		{
#	Line 192 | Line 272 | void sheepshaver_cpu::execute_sheep(uint
272		case 0:         // EMUL_RETURN
273		QuitEmulator();
274		break;
275	<
275	>
276		case 1:         // EXEC_RETURN
277	<	throw sheepshaver_exec_return();
277	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
278		break;
279
280		case 2:         // EXEC_NATIVE
#	Line 205 | Line 285 | void sheepshaver_cpu::execute_sheep(uint
285		pc() += 4;
286		break;
287
288	<	default: {      // EMUL_OP
289	<	M68kRegisters r68;
210	<	WriteMacInt32(XLM_68K_R25, gpr(25));
211	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
212	<	for (int i = 0; i < 8; i++)
213	<	r68.d[i] = gpr(8 + i);
214	<	for (int i = 0; i < 7; i++)
215	<	r68.a[i] = gpr(16 + i);
216	<	r68.a[7] = gpr(1);
217	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
218	<	for (int i = 0; i < 8; i++)
219	<	gpr(8 + i) = r68.d[i];
220	<	for (int i = 0; i < 7; i++)
221	<	gpr(16 + i) = r68.a[i];
222	<	gpr(1) = r68.a[7];
223	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
288	>	default:        // EMUL_OP
289	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
290		pc() += 4;
291		break;
292		}
227	–	}
293		}
294
295	<	// Checks for pending interrupts
296	<	struct execute_nothing {
297	<	static inline void execute(powerpc_cpu *) { }
298	<	};
295	>	// Compile one instruction
296	>	bool sheepshaver_cpu::compile1(codegen_context_t & cg_context)
297	>	{
298	>	#if PPC_ENABLE_JIT
299	>	const instr_info_t *ii = cg_context.instr_info;
300	>	if (ii->mnemo != PPC_I(SHEEP))
301	>	return false;
302	>
303	>	bool compiled = false;
304	>	powerpc_dyngen & dg = cg_context.codegen;
305	>	uint32 opcode = cg_context.opcode;
306	>
307	>	switch (opcode & 0x3f) {
308	>	case 0:         // EMUL_RETURN
309	>	dg.gen_invoke(QuitEmulator);
310	>	compiled = true;
311	>	break;
312
313	<	static void HandleInterrupt(void);
313	>	case 1:         // EXEC_RETURN
314	>	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
315	>	compiled = true;
316	>	break;
317
318	<	struct execute_spcflags_check {
319	<	static inline void execute(powerpc_cpu *cpu) {
320	<	if (SPCFLAGS_TEST(SPCFLAG_ALL_BUT_EXEC_RETURN)) {
321	<	if (SPCFLAGS_TEST( SPCFLAG_ENTER_MON )) {
322	<	SPCFLAGS_CLEAR( SPCFLAG_ENTER_MON );
323	<	enter_mon();
324	<	}
325	<	if (SPCFLAGS_TEST( SPCFLAG_DOINT )) {
326	<	SPCFLAGS_CLEAR( SPCFLAG_DOINT );
327	<	HandleInterrupt();
328	<	}
329	<	if (SPCFLAGS_TEST( SPCFLAG_INT )) {
330	<	SPCFLAGS_CLEAR( SPCFLAG_INT );
331	<	SPCFLAGS_SET( SPCFLAG_DOINT );
318	>	case 2: {       // EXEC_NATIVE
319	>	uint32 selector = NATIVE_OP_field::extract(opcode);
320	>	switch (selector) {
321	>	case NATIVE_PATCH_NAME_REGISTRY:
322	>	dg.gen_invoke(DoPatchNameRegistry);
323	>	compiled = true;
324	>	break;
325	>	case NATIVE_VIDEO_INSTALL_ACCEL:
326	>	dg.gen_invoke(VideoInstallAccel);
327	>	compiled = true;
328	>	break;
329	>	case NATIVE_VIDEO_VBL:
330	>	dg.gen_invoke(VideoVBL);
331	>	compiled = true;
332	>	break;
333	>	case NATIVE_GET_RESOURCE:
334	>	case NATIVE_GET_1_RESOURCE:
335	>	case NATIVE_GET_IND_RESOURCE:
336	>	case NATIVE_GET_1_IND_RESOURCE:
337	>	case NATIVE_R_GET_RESOURCE: {
338	>	static const uint32 get_resource_ptr[] = {
339	>	XLM_GET_RESOURCE,
340	>	XLM_GET_1_RESOURCE,
341	>	XLM_GET_IND_RESOURCE,
342	>	XLM_GET_1_IND_RESOURCE,
343	>	XLM_R_GET_RESOURCE
344	>	};
345	>	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
346	>	typedef void (*func_t)(dyngen_cpu_base, uint32);
347	>	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
348	>	dg.gen_invoke_CPU_im(func, old_get_resource);
349	>	compiled = true;
350	>	break;
351	>	}
352	>	case NATIVE_DISABLE_INTERRUPT:
353	>	dg.gen_invoke(DisableInterrupt);
354	>	compiled = true;
355	>	break;
356	>	case NATIVE_ENABLE_INTERRUPT:
357	>	dg.gen_invoke(EnableInterrupt);
358	>	compiled = true;
359	>	break;
360	>	case NATIVE_CHECK_LOAD_INVOC:
361	>	dg.gen_load_T0_GPR(3);
362	>	dg.gen_load_T1_GPR(4);
363	>	dg.gen_se_16_32_T1();
364	>	dg.gen_load_T2_GPR(5);
365	>	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
366	>	compiled = true;
367	>	break;
368	>	case NATIVE_BITBLT:
369	>	dg.gen_load_T0_GPR(3);
370	>	dg.gen_invoke_T0((void (*)(uint32))NQD_bitblt);
371	>	compiled = true;
372	>	break;
373	>	case NATIVE_INVRECT:
374	>	dg.gen_load_T0_GPR(3);
375	>	dg.gen_invoke_T0((void (*)(uint32))NQD_invrect);
376	>	compiled = true;
377	>	break;
378	>	case NATIVE_FILLRECT:
379	>	dg.gen_load_T0_GPR(3);
380	>	dg.gen_invoke_T0((void (*)(uint32))NQD_fillrect);
381	>	compiled = true;
382	>	break;
383	>	}
384	>	if (FN_field::test(opcode)) {
385	>	if (compiled) {
386	>	dg.gen_load_A0_LR();
387	>	dg.gen_set_PC_A0();
388		}
389	+	cg_context.done_compile = true;
390		}
391	+	else
392	+	cg_context.done_compile = false;
393	+	break;
394		}
254	–	};
395
396	<	// Execution loop
397	<	void sheepshaver_cpu::execute(uint32 entry)
398	<	{
399	<	try {
400	<	pc() = entry;
401	<	powerpc_cpu::do_execute<execute_nothing, execute_spcflags_check>();
396	>	default: {      // EMUL_OP
397	>	typedef void (*func_t)(dyngen_cpu_base, uint32);
398	>	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
399	>	dg.gen_invoke_CPU_im(func, EMUL_OP_field::extract(opcode) - 3);
400	>	cg_context.done_compile = false;
401	>	compiled = true;
402	>	break;
403		}
263	–	catch (sheepshaver_exec_return const &) {
264	–	// Nothing, simply return
265	–	}
266	–	catch (...) {
267	–	printf("ERROR: execute() received an unknown exception!\n");
268	–	QuitEmulator();
404		}
405	+	return compiled;
406	+	#endif
407	+	return false;
408		}
409
410		// Handle MacOS interrupt
411	<	void sheepshaver_cpu::interrupt(uint32 entry, sheepshaver_cpu *cpu)
411	>	void sheepshaver_cpu::interrupt(uint32 entry)
412		{
413	<	#if MULTICORE_CPU
414	<	// Initialize stack pointer from previous CPU running
415	<	gpr(1) = cpu->gpr(1);
416	<	#else
413	>	#if EMUL_TIME_STATS
414	>	interrupt_count++;
415	>	const clock_t interrupt_start = clock();
416	>	#endif
417	>
418	>	#if SAFE_INTERRUPT_PPC
419	>	static int depth = 0;
420	>	if (depth != 0)
421	>	printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
422	>	depth++;
423	>	#endif
424	>	#if SAFE_INTERRUPT_PPC >= 2
425	>	uint32 saved_regs[32];
426	>	memcpy(&saved_regs[0], &gpr(0), sizeof(saved_regs));
427	>	#endif
428	>
429	>	#if !MULTICORE_CPU
430		// Save program counters and branch registers
431		uint32 saved_pc = pc();
432		uint32 saved_lr = lr();
433		uint32 saved_ctr= ctr();
434	+	uint32 saved_sp = gpr(1);
435		#endif
436
437	<	// Create stack frame
438	<	gpr(1) -= 64;
437	>	// Initialize stack pointer to SheepShaver alternate stack base
438	>	gpr(1) = SignalStackBase() - 64;
439
440		// Build trampoline to return from interrupt
441	<	uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
441	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
442
443		// Prepare registers for nanokernel interrupt routine
444	<	kernel_data->v[0x004 >> 2] = gpr(1);
445	<	kernel_data->v[0x018 >> 2] = gpr(6);
444	>	kernel_data->v[0x004 >> 2] = htonl(gpr(1));
445	>	kernel_data->v[0x018 >> 2] = htonl(gpr(6));
446
447	<	gpr(6) = kernel_data->v[0x65c >> 2];
447	>	gpr(6) = ntohl(kernel_data->v[0x65c >> 2]);
448		assert(gpr(6) != 0);
449		WriteMacInt32(gpr(6) + 0x13c, gpr(7));
450		WriteMacInt32(gpr(6) + 0x144, gpr(8));
#	Line 303 | Line 455 | void sheepshaver_cpu::interrupt(uint32 e
455		WriteMacInt32(gpr(6) + 0x16c, gpr(13));
456
457		gpr(1)  = KernelDataAddr;
458	<	gpr(7)  = kernel_data->v[0x660 >> 2];
458	>	gpr(7)  = ntohl(kernel_data->v[0x660 >> 2]);
459		gpr(8)  = 0;
460	<	gpr(10) = (uint32)trampoline;
461	<	gpr(12) = (uint32)trampoline;
462	<	gpr(13) = cr().get();
460	>	gpr(10) = trampoline.addr();
461	>	gpr(12) = trampoline.addr();
462	>	gpr(13) = get_cr();
463
464		// rlwimi. r7,r7,8,0,0
465		uint32 result = op_ppc_rlwimi::apply(gpr(7), 8, 0x80000000, gpr(7));
#	Line 315 | Line 467 | void sheepshaver_cpu::interrupt(uint32 e
467		gpr(7) = result;
468
469		gpr(11) = 0xf072; // MSR (SRR1)
470	<	cr().set((gpr(11) & 0x0fff0000) | (cr().get() & ~0x0fff0000));
470	>	cr().set((gpr(11) & 0x0fff0000) | (get_cr() & ~0x0fff0000));
471
472		// Enter nanokernel
473		execute(entry);
474
323	–	// Cleanup stack
324	–	gpr(1) += 64;
325	–
475		#if !MULTICORE_CPU
476		// Restore program counters and branch registers
477		pc() = saved_pc;
478		lr() = saved_lr;
479		ctr()= saved_ctr;
480	+	gpr(1) = saved_sp;
481	+	#endif
482	+
483	+	#if EMUL_TIME_STATS
484	+	interrupt_time += (clock() - interrupt_start);
485	+	#endif
486	+
487	+	#if SAFE_INTERRUPT_PPC >= 2
488	+	if (memcmp(&saved_regs[0], &gpr(0), sizeof(saved_regs)) != 0)
489	+	printf("FATAL: dirty PowerPC registers\n");
490	+	#endif
491	+	#if SAFE_INTERRUPT_PPC
492	+	depth--;
493		#endif
494		}
495
496		// Execute 68k routine
497		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
498		{
499	+	#if EMUL_TIME_STATS
500	+	exec68k_count++;
501	+	const clock_t exec68k_start = clock();
502	+	#endif
503	+
504		#if SAFE_EXEC_68K
505		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
506		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 343 | Line 510 | void sheepshaver_cpu::execute_68k(uint32
510		uint32 saved_pc = pc();
511		uint32 saved_lr = lr();
512		uint32 saved_ctr= ctr();
513	+	uint32 saved_cr = get_cr();
514
515		// Create MacOS stack frame
516	+	// FIXME: make sure MacOS doesn't expect PPC registers to live on top
517		uint32 sp = gpr(1);
518	<	gpr(1) -= 56 + 19*4 + 18*8;
518	>	gpr(1) -= 56;
519		WriteMacInt32(gpr(1), sp);
520
521		// Save PowerPC registers
522	<	memcpy(Mac2HostAddr(gpr(1)+56), &gpr(13), sizeof(uint32)*(32-13));
522	>	uint32 saved_GPRs[19];
523	>	memcpy(&saved_GPRs[0], &gpr(13), sizeof(uint32)*(32-13));
524		#if SAVE_FP_EXEC_68K
525	<	memcpy(Mac2HostAddr(gpr(1)+56+19*4), &fpr(14), sizeof(double)*(32-14));
525	>	double saved_FPRs[18];
526	>	memcpy(&saved_FPRs[0], &fpr(14), sizeof(double)*(32-14));
527		#endif
528
529		// Setup registers for 68k emulator
#	Line 366 | Line 537 | void sheepshaver_cpu::execute_68k(uint32
537		gpr(25) = ReadMacInt32(XLM_68K_R25);            // MSB of SR
538		gpr(26) = 0;
539		gpr(28) = 0;                                                            // VBR
540	<	gpr(29) = kernel_data->ed.v[0x74 >> 2];         // Pointer to opcode table
541	<	gpr(30) = kernel_data->ed.v[0x78 >> 2];         // Address of emulator
540	>	gpr(29) = ntohl(kernel_data->ed.v[0x74 >> 2]);          // Pointer to opcode table
541	>	gpr(30) = ntohl(kernel_data->ed.v[0x78 >> 2]);          // Address of emulator
542		gpr(31) = KernelDataAddr + 0x1000;
543
544		// Push return address (points to EXEC_RETURN opcode) on stack
#	Line 399 | Line 570 | void sheepshaver_cpu::execute_68k(uint32
570		r->a[i] = gpr(16 + i);
571
572		// Restore PowerPC registers
573	<	memcpy(&gpr(13), Mac2HostAddr(gpr(1)+56), sizeof(uint32)*(32-13));
573	>	memcpy(&gpr(13), &saved_GPRs[0], sizeof(uint32)*(32-13));
574		#if SAVE_FP_EXEC_68K
575	<	memcpy(&fpr(14), Mac2HostAddr(gpr(1)+56+19*4), sizeof(double)*(32-14));
575	>	memcpy(&fpr(14), &saved_FPRs[0], sizeof(double)*(32-14));
576		#endif
577
578		// Cleanup stack
579	<	gpr(1) += 56 + 19*4 + 18*8;
579	>	gpr(1) += 56;
580
581		// Restore program counters and branch registers
582		pc() = saved_pc;
583		lr() = saved_lr;
584		ctr()= saved_ctr;
585	+	set_cr(saved_cr);
586	+
587	+	#if EMUL_TIME_STATS
588	+	exec68k_time += (clock() - exec68k_start);
589	+	#endif
590		}
591
592		// Call MacOS PPC code
593		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
594		{
595	+	#if EMUL_TIME_STATS
596	+	macos_exec_count++;
597	+	const clock_t macos_exec_start = clock();
598	+	#endif
599	+
600		// Save program counters and branch registers
601		uint32 saved_pc = pc();
602		uint32 saved_lr = lr();
603		uint32 saved_ctr= ctr();
604
605		// Build trampoline with EXEC_RETURN
606	<	uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
607	<	lr() = (uint32)trampoline;
606	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
607	>	lr() = trampoline.addr();
608
609		gpr(1) -= 64;                                                           // Create stack frame
610		uint32 proc = ReadMacInt32(tvect);                      // Get routine address
#	Line 454 | Line 635 | uint32 sheepshaver_cpu::execute_macos_co
635		lr() = saved_lr;
636		ctr()= saved_ctr;
637
638	+	#if EMUL_TIME_STATS
639	+	macos_exec_time += (clock() - macos_exec_start);
640	+	#endif
641	+
642		return retval;
643		}
644
#	Line 462 | Line 647 | inline void sheepshaver_cpu::execute_ppc
647		{
648		// Save branch registers
649		uint32 saved_lr = lr();
465	–	uint32 saved_ctr= ctr();
650
651	<	const uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
651	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
652	>	WriteMacInt32(trampoline.addr(), POWERPC_EXEC_RETURN);
653	>	lr() = trampoline.addr();
654
469	–	lr() = (uint32)trampoline;
470	–	ctr()= entry;
655		execute(entry);
656
657		// Restore branch registers
658		lr() = saved_lr;
475	–	ctr()= saved_ctr;
659		}
660
661		// Resource Manager thunk
479	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint16 **h);
480	–
662		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
663		{
664		uint32 type = gpr(3);
#	Line 488 | Line 669 | inline void sheepshaver_cpu::get_resourc
669
670		// Call old routine
671		execute_ppc(old_get_resource);
491	–	uint16 **handle = (uint16 **)gpr(3);
672
673		// Call CheckLoad()
674	+	uint32 handle = gpr(3);
675		check_load_invoc(type, id, handle);
676	<	gpr(3) = (uint32)handle;
676	>	gpr(3) = handle;
677
678		// Cleanup stack
679		gpr(1) += 56;
#	Line 507 | Line 688 | static sheepshaver_cpu *main_cpu = NULL;
688		static sheepshaver_cpu *interrupt_cpu = NULL;   // CPU emulator to handle interrupts
689		static sheepshaver_cpu *current_cpu = NULL;             // Current CPU emulator context
690
691	+	void FlushCodeCache(uintptr start, uintptr end)
692	+	{
693	+	D(bug("FlushCodeCache(%08x, %08x)\n", start, end));
694	+	main_cpu->invalidate_cache_range(start, end);
695	+	#if MULTICORE_CPU
696	+	interrupt_cpu->invalidate_cache_range(start, end);
697	+	#endif
698	+	}
699	+
700		static inline void cpu_push(sheepshaver_cpu *new_cpu)
701		{
702		#if MULTICORE_CPU
#	Line 552 | Line 742 | static sigsegv_return_t sigsegv_handler(
742		if ((addr - ROM_BASE) < ROM_SIZE)
743		return SIGSEGV_RETURN_SKIP_INSTRUCTION;
744
745	<	// Ignore all other faults, if requested
746	<	if (PrefsFindBool("ignoresegv"))
747	<	return SIGSEGV_RETURN_FAILURE;
745	>	// Get program counter of target CPU
746	>	sheepshaver_cpu * const cpu = current_cpu;
747	>	const uint32 pc = cpu->pc();
748	>
749	>	// Fault in Mac ROM or RAM?
750	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
751	>	if (mac_fault) {
752	>
753	>	// "VM settings" during MacOS 8 installation
754	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
755	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
756	>
757	>	// MacOS 8.5 installation
758	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
759	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
760	>
761	>	// MacOS 8 serial drivers on startup
762	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
763	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
764	>
765	>	// MacOS 8.1 serial drivers on startup
766	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
767	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
768	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
769	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
770	>
771	>	// Ignore writes to the zero page
772	>	else if ((uint32)(addr - SheepMem::ZeroPage()) < (uint32)SheepMem::PageSize())
773	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
774	>
775	>	// Ignore all other faults, if requested
776	>	if (PrefsFindBool("ignoresegv"))
777	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
778	>	}
779		#else
780		#error "FIXME: You don't have the capability to skip instruction within signal handlers"
781		#endif
#	Line 576 | Line 797 | void init_emul_ppc(void)
797		// Initialize main CPU emulator
798		main_cpu = new sheepshaver_cpu();
799		main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
800	+	main_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
801		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
802
803		#if MULTICORE_CPU
#	Line 585 | Line 807 | void init_emul_ppc(void)
807
808		// Install the handler for SIGSEGV
809		sigsegv_install_handler(sigsegv_handler);
810	<
810	>
811		#if ENABLE_MON
812		// Install "regs" command in cxmon
813		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
814		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
815		#endif
816	+
817	+	#if EMUL_TIME_STATS
818	+	emul_start_time = clock();
819	+	#endif
820	+	}
821	+
822	+	/*
823	+	*  Deinitialize emulation
824	+	*/
825	+
826	+	void exit_emul_ppc(void)
827	+	{
828	+	#if EMUL_TIME_STATS
829	+	clock_t emul_end_time = clock();
830	+
831	+	printf("### Statistics for SheepShaver emulation parts\n");
832	+	const clock_t emul_time = emul_end_time - emul_start_time;
833	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
834	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
835	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
836	+
837	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
838	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
839	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
840	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
841	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
842	+	} while (0)
843	+
844	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
845	+	PRINT_STATS("NativeOp execution", native_exec);
846	+	PRINT_STATS("MacOS routine execution", macos_exec);
847	+
848	+	#undef PRINT_STATS
849	+	printf("\n");
850	+	#endif
851	+
852	+	delete main_cpu;
853	+	#if MULTICORE_CPU
854	+	delete interrupt_cpu;
855	+	#endif
856		}
857
858		/*
#	Line 600 | Line 862 | void init_emul_ppc(void)
862		void emul_ppc(uint32 entry)
863		{
864		current_cpu = main_cpu;
865	+	#if 0
866		current_cpu->start_log();
867	+	#endif
868	+	// start emulation loop and enable code translation or caching
869		current_cpu->execute(entry);
870		}
871
#	Line 608 | Line 873 | void emul_ppc(uint32 entry)
873		*  Handle PowerPC interrupt
874		*/
875
876	<	// Atomic operations
877	<	extern int atomic_add(int *var, int v);
878	<	extern int atomic_and(int *var, int v);
879	<	extern int atomic_or(int *var, int v);
880	<
876	>	#if ASYNC_IRQ
877	>	void HandleInterrupt(void)
878	>	{
879	>	main_cpu->handle_interrupt();
880	>	}
881	>	#else
882		void TriggerInterrupt(void)
883		{
884		#if 0
885		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
886		#else
887	<	SPCFLAGS_SET( SPCFLAG_INT );
887	>	// Trigger interrupt to main cpu only
888	>	if (main_cpu)
889	>	main_cpu->trigger_interrupt();
890		#endif
891		}
892	+	#endif
893
894	<	static void HandleInterrupt(void)
894	>	void sheepshaver_cpu::handle_interrupt(void)
895		{
896		// Do nothing if interrupts are disabled
897	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
897	>	if (*(int32 *)XLM_IRQ_NEST > 0)
898		return;
899
900		// Do nothing if there is no interrupt pending
#	Line 641 | Line 910 | static void HandleInterrupt(void)
910		// 68k emulator active, trigger 68k interrupt level 1
911		assert(current_cpu == main_cpu);
912		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
913	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
913	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
914		break;
915
916		#if INTERRUPTS_IN_NATIVE_MODE
917		case MODE_NATIVE:
918		// 68k emulator inactive, in nanokernel?
919		assert(current_cpu == main_cpu);
920	<	if (main_cpu->gpr(1) != KernelDataAddr) {
920	>	if (gpr(1) != KernelDataAddr) {
921		// Prepare for 68k interrupt level 1
922		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
923		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 659 | Line 928 | static void HandleInterrupt(void)
928		DisableInterrupt();
929		cpu_push(interrupt_cpu);
930		if (ROMType == ROMTYPE_NEWWORLD)
931	<	current_cpu->interrupt(ROM_BASE + 0x312b1c, main_cpu);
931	>	current_cpu->interrupt(ROM_BASE + 0x312b1c);
932		else
933	<	current_cpu->interrupt(ROM_BASE + 0x312a3c, main_cpu);
933	>	current_cpu->interrupt(ROM_BASE + 0x312a3c);
934		cpu_pop();
935		}
936		break;
#	Line 692 | Line 961 | static void HandleInterrupt(void)
961		if (InterruptFlags & INTFLAG_VIA) {
962		ClearInterruptFlag(INTFLAG_VIA);
963		ADBInterrupt();
964	<	ExecutePPC(VideoVBL);
964	>	ExecuteNative(NATIVE_VIDEO_VBL);
965		}
966		}
967		#endif
#	Line 702 | Line 971 | static void HandleInterrupt(void)
971		}
972		}
973
705	–	/*
706	–	*  Execute NATIVE_OP opcode (called by PowerPC emulator)
707	–	*/
708	–
709	–	#define POWERPC_NATIVE_OP_INIT(LR, OP) \
710	–	tswap32(POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2)
711	–
712	–	// FIXME: Make sure 32-bit relocations are used
713	–	const uint32 NativeOpTable[NATIVE_OP_MAX] = {
714	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_PATCH_NAME_REGISTRY),
715	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_INSTALL_ACCEL),
716	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_VBL),
717	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_DO_DRIVER_IO),
718	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_IRQ),
719	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_INIT),
720	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_TERM),
721	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_OPEN),
722	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_CLOSE),
723	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_WPUT),
724	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_RSRV),
725	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_NOTHING),
726	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_OPEN),
727	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_IN),
728	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_OUT),
729	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CONTROL),
730	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_STATUS),
731	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CLOSE),
732	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_RESOURCE),
733	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_RESOURCE),
734	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_IND_RESOURCE),
735	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_IND_RESOURCE),
736	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_R_GET_RESOURCE),
737	–	POWERPC_NATIVE_OP_INIT(0, NATIVE_DISABLE_INTERRUPT),
738	–	POWERPC_NATIVE_OP_INIT(0, NATIVE_ENABLE_INTERRUPT),
739	–	};
740	–
974		static void get_resource(void);
975		static void get_1_resource(void);
976		static void get_ind_resource(void);
#	Line 748 | Line 981 | static void r_get_resource(void);
981
982		static void NativeOp(int selector)
983		{
984	+	#if EMUL_TIME_STATS
985	+	native_exec_count++;
986	+	const clock_t native_exec_start = clock();
987	+	#endif
988	+
989		switch (selector) {
990		case NATIVE_PATCH_NAME_REGISTRY:
991		DoPatchNameRegistry();
#	Line 762 | Line 1000 | static void NativeOp(int selector)
1000		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
1001		(void *)GPR(5), GPR(6), GPR(7));
1002		break;
1003	<	case NATIVE_GET_RESOURCE:
1004	<	get_resource();
1003	>	#ifdef WORDS_BIGENDIAN
1004	>	case NATIVE_ETHER_IRQ:
1005	>	EtherIRQ();
1006		break;
1007	<	case NATIVE_GET_1_RESOURCE:
1008	<	get_1_resource();
1007	>	case NATIVE_ETHER_INIT:
1008	>	GPR(3) = InitStreamModule((void *)GPR(3));
1009		break;
1010	<	case NATIVE_GET_IND_RESOURCE:
1011	<	get_ind_resource();
1010	>	case NATIVE_ETHER_TERM:
1011	>	TerminateStreamModule();
1012		break;
1013	<	case NATIVE_GET_1_IND_RESOURCE:
1014	<	get_1_ind_resource();
1013	>	case NATIVE_ETHER_OPEN:
1014	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
1015	>	break;
1016	>	case NATIVE_ETHER_CLOSE:
1017	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
1018	>	break;
1019	>	case NATIVE_ETHER_WPUT:
1020	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
1021	>	break;
1022	>	case NATIVE_ETHER_RSRV:
1023	>	GPR(3) = ether_rsrv((queue_t *)GPR(3));
1024	>	break;
1025	>	#else
1026	>	case NATIVE_ETHER_INIT:
1027	>	// FIXME: needs more complicated thunks
1028	>	GPR(3) = false;
1029		break;
1030	<	case NATIVE_R_GET_RESOURCE:
1031	<	r_get_resource();
1030	>	#endif
1031	>	case NATIVE_SYNC_HOOK:
1032	>	GPR(3) = NQD_sync_hook(GPR(3));
1033	>	break;
1034	>	case NATIVE_BITBLT_HOOK:
1035	>	GPR(3) = NQD_bitblt_hook(GPR(3));
1036	>	break;
1037	>	case NATIVE_BITBLT:
1038	>	NQD_bitblt(GPR(3));
1039	>	break;
1040	>	case NATIVE_FILLRECT_HOOK:
1041	>	GPR(3) = NQD_fillrect_hook(GPR(3));
1042	>	break;
1043	>	case NATIVE_INVRECT:
1044	>	NQD_invrect(GPR(3));
1045	>	break;
1046	>	case NATIVE_FILLRECT:
1047	>	NQD_fillrect(GPR(3));
1048		break;
1049		case NATIVE_SERIAL_NOTHING:
1050		case NATIVE_SERIAL_OPEN:
#	Line 797 | Line 1066 | static void NativeOp(int selector)
1066		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
1067		break;
1068		}
1069	+	case NATIVE_GET_RESOURCE:
1070	+	case NATIVE_GET_1_RESOURCE:
1071	+	case NATIVE_GET_IND_RESOURCE:
1072	+	case NATIVE_GET_1_IND_RESOURCE:
1073	+	case NATIVE_R_GET_RESOURCE: {
1074	+	typedef void (*GetResourceCallback)(void);
1075	+	static const GetResourceCallback get_resource_callbacks[] = {
1076	+	get_resource,
1077	+	get_1_resource,
1078	+	get_ind_resource,
1079	+	get_1_ind_resource,
1080	+	r_get_resource
1081	+	};
1082	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
1083	+	break;
1084	+	}
1085		case NATIVE_DISABLE_INTERRUPT:
1086		DisableInterrupt();
1087		break;
1088		case NATIVE_ENABLE_INTERRUPT:
1089		EnableInterrupt();
1090		break;
1091	+	case NATIVE_MAKE_EXECUTABLE:
1092	+	MakeExecutable(0, (void *)GPR(4), GPR(5));
1093	+	break;
1094	+	case NATIVE_CHECK_LOAD_INVOC:
1095	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1096	+	break;
1097		default:
1098		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1099		QuitEmulator();
1100		break;
1101		}
811	–	}
1102
1103	<	/*
1104	<	*  Execute native subroutine (LR must contain return address)
1105	<	*/
816	<
817	<	void ExecuteNative(int selector)
818	<	{
819	<	uint32 tvect[2];
820	<	tvect[0] = tswap32(POWERPC_NATIVE_OP_FUNC(selector));
821	<	tvect[1] = 0; // Fake TVECT
822	<	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
823	<	M68kRegisters r;
824	<	Execute68k((uint32)&desc, &r);
1103	>	#if EMUL_TIME_STATS
1104	>	native_exec_time += (clock() - native_exec_start);
1105	>	#endif
1106		}
1107
1108		/*
#	Line 842 | Line 1123 | void Execute68k(uint32 pc, M68kRegisters
1123
1124		void Execute68kTrap(uint16 trap, M68kRegisters *r)
1125		{
1126	<	uint16 proc[2] = {trap, M68K_RTS};
1127	<	Execute68k((uint32)proc, r);
1126	>	SheepVar proc_var(4);
1127	>	uint32 proc = proc_var.addr();
1128	>	WriteMacInt16(proc, trap);
1129	>	WriteMacInt16(proc + 2, M68K_RTS);
1130	>	Execute68k(proc, r);
1131		}
1132
1133		/*
#	Line 898 | Line 1182 | uint32 call_macos7(uint32 tvect, uint32
1182		}
1183
1184		/*
901	–	*  Atomic operations
902	–	*/
903	–
904	–	int atomic_add(int *var, int v)
905	–	{
906	–	int ret = *var;
907	–	*var += v;
908	–	return ret;
909	–	}
910	–
911	–	int atomic_and(int *var, int v)
912	–	{
913	–	int ret = *var;
914	–	*var &= v;
915	–	return ret;
916	–	}
917	–
918	–	int atomic_or(int *var, int v)
919	–	{
920	–	int ret = *var;
921	–	*var |= v;
922	–	return ret;
923	–	}
924	–
925	–	/*
1185		*  Resource Manager thunks
1186		*/
1187

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