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input: make it more modular
[picodrive.git] / cpu / musashi / m68kcpu.h
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1#include <stdio.h>\r
2/* ======================================================================== */\r
3/* ========================= LICENSING & COPYRIGHT ======================== */\r
4/* ======================================================================== */\r
5/*\r
6 * MUSASHI\r
7 * Version 3.31\r
8 *\r
9 * A portable Motorola M680x0 processor emulation engine.\r
10 * Copyright 1998-2007 Karl Stenerud. All rights reserved.\r
11 *\r
12 * This code may be freely used for non-commercial purposes as long as this\r
13 * copyright notice remains unaltered in the source code and any binary files\r
14 * containing this code in compiled form.\r
15 *\r
16 * All other lisencing terms must be negotiated with the author\r
17 * (Karl Stenerud).\r
18 *\r
19 * The latest version of this code can be obtained at:\r
20 * http://kstenerud.cjb.net\r
21 */\r
22\r
23\r
24\r
25\r
26#ifndef M68KCPU__HEADER\r
27#define M68KCPU__HEADER\r
28\r
29// notaz: something's missing this\r
30#ifndef UINT64\r
31#define UINT64 unsigned long long\r
32#endif\r
33#ifndef UINT16\r
34#define UINT32 unsigned int\r
35#define UINT16 unsigned short\r
36#define UINT8 unsigned char\r
37#endif\r
38\r
39#include "m68k.h"\r
40#include <limits.h>\r
41\r
42#if M68K_EMULATE_ADDRESS_ERROR\r
43#include <setjmp.h>\r
44#endif /* M68K_EMULATE_ADDRESS_ERROR */\r
45\r
46/* ======================================================================== */\r
47/* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */\r
48/* ======================================================================== */\r
49\r
50/* Check for > 32bit sizes */\r
51#if UINT_MAX > 0xffffffff\r
52 #define M68K_INT_GT_32_BIT 1\r
53#else\r
54 #define M68K_INT_GT_32_BIT 0\r
55#endif\r
56\r
57/* Data types used in this emulation core */\r
58#undef sint8\r
59#undef sint16\r
60#undef sint32\r
61#undef sint64\r
62#undef uint8\r
63#undef uint16\r
64#undef uint32\r
65#undef uint64\r
66#undef sint\r
67#undef uint\r
68\r
69#define sint8 signed char /* ASG: changed from char to signed char */\r
70#define sint16 signed short\r
71#define sint32 signed int /* AWJ: changed from long to int */\r
72#define uint8 unsigned char\r
73#define uint16 unsigned short\r
74#define uint32 unsigned int /* AWJ: changed from long to int */\r
75\r
76/* signed and unsigned int must be at least 32 bits wide */\r
77#define sint signed int\r
78#define uint unsigned int\r
79\r
80\r
81#if M68K_USE_64_BIT\r
82#define sint64 signed long long\r
83#define uint64 unsigned long long\r
84#else\r
85#define sint64 sint32\r
86#define uint64 uint32\r
87#endif /* M68K_USE_64_BIT */\r
88\r
89\r
90\r
91/* Allow for architectures that don't have 8-bit sizes */\r
92#if UCHAR_MAX == 0xff\r
93 #define MAKE_INT_8(A) (sint8)(A)\r
94#else\r
95 #undef sint8\r
96 #define sint8 signed int\r
97 #undef uint8\r
98 #define uint8 unsigned int\r
99 INLINE sint MAKE_INT_8(uint value)\r
100 {\r
101 return (value & 0x80) ? value | ~0xff : value & 0xff;\r
102 }\r
103#endif /* UCHAR_MAX == 0xff */\r
104\r
105\r
106/* Allow for architectures that don't have 16-bit sizes */\r
107#if USHRT_MAX == 0xffff\r
108 #define MAKE_INT_16(A) (sint16)(A)\r
109#else\r
110 #undef sint16\r
111 #define sint16 signed int\r
112 #undef uint16\r
113 #define uint16 unsigned int\r
114 INLINE sint MAKE_INT_16(uint value)\r
115 {\r
116 return (value & 0x8000) ? value | ~0xffff : value & 0xffff;\r
117 }\r
118#endif /* USHRT_MAX == 0xffff */\r
119\r
120\r
121/* Allow for architectures that don't have 32-bit sizes */\r
122#if UINT_MAX == 0xffffffff\r
123 #define MAKE_INT_32(A) (sint32)(A)\r
124#else\r
125 #undef sint32\r
126 #define sint32 signed int\r
127 #undef uint32\r
128 #define uint32 unsigned int\r
129 INLINE sint MAKE_INT_32(uint value)\r
130 {\r
131 return (value & 0x80000000) ? value | ~0xffffffff : value & 0xffffffff;\r
132 }\r
133#endif /* UINT_MAX == 0xffffffff */\r
134\r
135\r
136\r
137\r
138/* ======================================================================== */\r
139/* ============================ GENERAL DEFINES =========================== */\r
140/* ======================================================================== */\r
141\r
142/* Exception Vectors handled by emulation */\r
143#define EXCEPTION_BUS_ERROR 2 /* This one is not emulated! */\r
144#define EXCEPTION_ADDRESS_ERROR 3 /* This one is partially emulated (doesn't stack a proper frame yet) */\r
145#define EXCEPTION_ILLEGAL_INSTRUCTION 4\r
146#define EXCEPTION_ZERO_DIVIDE 5\r
147#define EXCEPTION_CHK 6\r
148#define EXCEPTION_TRAPV 7\r
149#define EXCEPTION_PRIVILEGE_VIOLATION 8\r
150#define EXCEPTION_TRACE 9\r
151#define EXCEPTION_1010 10\r
152#define EXCEPTION_1111 11\r
153#define EXCEPTION_FORMAT_ERROR 14\r
154#define EXCEPTION_UNINITIALIZED_INTERRUPT 15\r
155#define EXCEPTION_SPURIOUS_INTERRUPT 24\r
156#define EXCEPTION_INTERRUPT_AUTOVECTOR 24\r
157#define EXCEPTION_TRAP_BASE 32\r
158\r
159/* Function codes set by CPU during data/address bus activity */\r
160#define FUNCTION_CODE_USER_DATA 1\r
161#define FUNCTION_CODE_USER_PROGRAM 2\r
162#define FUNCTION_CODE_SUPERVISOR_DATA 5\r
163#define FUNCTION_CODE_SUPERVISOR_PROGRAM 6\r
164#define FUNCTION_CODE_CPU_SPACE 7\r
165\r
166/* CPU types for deciding what to emulate */\r
167#define CPU_TYPE_000 1\r
168#define CPU_TYPE_008 2\r
169#define CPU_TYPE_010 4\r
170#define CPU_TYPE_EC020 8\r
171#define CPU_TYPE_020 16\r
172#define CPU_TYPE_040 32\r
173\r
174/* Different ways to stop the CPU */\r
175#define STOP_LEVEL_STOP 1\r
176#define STOP_LEVEL_HALT 2\r
177\r
178/* Used for 68000 address error processing */\r
179#define INSTRUCTION_YES 0\r
180#define INSTRUCTION_NO 0x08\r
181#define MODE_READ 0x10\r
182#define MODE_WRITE 0\r
183\r
184#define RUN_MODE_NORMAL 0\r
185#define RUN_MODE_BERR_AERR_RESET 1\r
186\r
187#ifndef NULL\r
188#define NULL ((void*)0)\r
189#endif\r
190\r
191/* ======================================================================== */\r
192/* ================================ MACROS ================================ */\r
193/* ======================================================================== */\r
194\r
195\r
196/* ---------------------------- General Macros ---------------------------- */\r
197\r
198/* Bit Isolation Macros */\r
199#define BIT_0(A) ((A) & 0x00000001)\r
200#define BIT_1(A) ((A) & 0x00000002)\r
201#define BIT_2(A) ((A) & 0x00000004)\r
202#define BIT_3(A) ((A) & 0x00000008)\r
203#define BIT_4(A) ((A) & 0x00000010)\r
204#define BIT_5(A) ((A) & 0x00000020)\r
205#define BIT_6(A) ((A) & 0x00000040)\r
206#define BIT_7(A) ((A) & 0x00000080)\r
207#define BIT_8(A) ((A) & 0x00000100)\r
208#define BIT_9(A) ((A) & 0x00000200)\r
209#define BIT_A(A) ((A) & 0x00000400)\r
210#define BIT_B(A) ((A) & 0x00000800)\r
211#define BIT_C(A) ((A) & 0x00001000)\r
212#define BIT_D(A) ((A) & 0x00002000)\r
213#define BIT_E(A) ((A) & 0x00004000)\r
214#define BIT_F(A) ((A) & 0x00008000)\r
215#define BIT_10(A) ((A) & 0x00010000)\r
216#define BIT_11(A) ((A) & 0x00020000)\r
217#define BIT_12(A) ((A) & 0x00040000)\r
218#define BIT_13(A) ((A) & 0x00080000)\r
219#define BIT_14(A) ((A) & 0x00100000)\r
220#define BIT_15(A) ((A) & 0x00200000)\r
221#define BIT_16(A) ((A) & 0x00400000)\r
222#define BIT_17(A) ((A) & 0x00800000)\r
223#define BIT_18(A) ((A) & 0x01000000)\r
224#define BIT_19(A) ((A) & 0x02000000)\r
225#define BIT_1A(A) ((A) & 0x04000000)\r
226#define BIT_1B(A) ((A) & 0x08000000)\r
227#define BIT_1C(A) ((A) & 0x10000000)\r
228#define BIT_1D(A) ((A) & 0x20000000)\r
229#define BIT_1E(A) ((A) & 0x40000000)\r
230#define BIT_1F(A) ((A) & 0x80000000)\r
231\r
232/* Get the most significant bit for specific sizes */\r
233#define GET_MSB_8(A) ((A) & 0x80)\r
234#define GET_MSB_9(A) ((A) & 0x100)\r
235#define GET_MSB_16(A) ((A) & 0x8000)\r
236#define GET_MSB_17(A) ((A) & 0x10000)\r
237#define GET_MSB_32(A) ((A) & 0x80000000)\r
238#if M68K_USE_64_BIT\r
239#define GET_MSB_33(A) ((A) & 0x100000000)\r
240#endif /* M68K_USE_64_BIT */\r
241\r
242/* Isolate nibbles */\r
243#define LOW_NIBBLE(A) ((A) & 0x0f)\r
244#define HIGH_NIBBLE(A) ((A) & 0xf0)\r
245\r
246/* These are used to isolate 8, 16, and 32 bit sizes */\r
247#define MASK_OUT_ABOVE_2(A) ((A) & 3)\r
248#define MASK_OUT_ABOVE_8(A) ((A) & 0xff)\r
249#define MASK_OUT_ABOVE_16(A) ((A) & 0xffff)\r
250#define MASK_OUT_BELOW_2(A) ((A) & ~3)\r
251#define MASK_OUT_BELOW_8(A) ((A) & ~0xff)\r
252#define MASK_OUT_BELOW_16(A) ((A) & ~0xffff)\r
253\r
254/* No need to mask if we are 32 bit */\r
255#if M68K_INT_GT_32_BIT || M68K_USE_64_BIT\r
256 #define MASK_OUT_ABOVE_32(A) ((A) & 0xffffffff)\r
257 #define MASK_OUT_BELOW_32(A) ((A) & ~0xffffffff)\r
258#else\r
259 #define MASK_OUT_ABOVE_32(A) (A)\r
260 #define MASK_OUT_BELOW_32(A) 0\r
261#endif /* M68K_INT_GT_32_BIT || M68K_USE_64_BIT */\r
262\r
263/* Simulate address lines of 68k family */\r
264#define ADDRESS_68K(A) ((A)&CPU_ADDRESS_MASK)\r
265\r
266\r
267/* Shift & Rotate Macros. */\r
268#define LSL(A, C) ((A) << (C))\r
269#define LSR(A, C) ((A) >> (C))\r
270\r
271/* Some > 32-bit optimizations */\r
272#if M68K_INT_GT_32_BIT\r
273 /* Shift left and right */\r
274 #define LSR_32(A, C) ((A) >> (C))\r
275 #define LSL_32(A, C) ((A) << (C))\r
276#else\r
277 /* We have to do this because the morons at ANSI decided that shifts\r
278 * by >= data size are undefined.\r
279 */\r
280 #define LSR_32(A, C) ((C) < 32 ? (A) >> (C) : 0)\r
281 #define LSL_32(A, C) ((C) < 32 ? (A) << (C) : 0)\r
282#endif /* M68K_INT_GT_32_BIT */\r
283\r
284#if M68K_USE_64_BIT\r
285 #define LSL_32_64(A, C) ((A) << (C))\r
286 #define LSR_32_64(A, C) ((A) >> (C))\r
287 #define ROL_33_64(A, C) (LSL_32_64(A, C) | LSR_32_64(A, 33-(C)))\r
288 #define ROR_33_64(A, C) (LSR_32_64(A, C) | LSL_32_64(A, 33-(C)))\r
289#endif /* M68K_USE_64_BIT */\r
290\r
291#define ROL_8(A, C) MASK_OUT_ABOVE_8(LSL(A, C) | LSR(A, 8-(C)))\r
292#define ROL_9(A, C) (LSL(A, C) | LSR(A, 9-(C)))\r
293#define ROL_16(A, C) MASK_OUT_ABOVE_16(LSL(A, C) | LSR(A, 16-(C)))\r
294#define ROL_17(A, C) (LSL(A, C) | LSR(A, 17-(C)))\r
295#define ROL_32(A, C) MASK_OUT_ABOVE_32(LSL_32(A, C) | LSR_32(A, 32-(C)))\r
296#define ROL_33(A, C) (LSL_32(A, C) | LSR_32(A, 33-(C)))\r
297\r
298#define ROR_8(A, C) MASK_OUT_ABOVE_8(LSR(A, C) | LSL(A, 8-(C)))\r
299#define ROR_9(A, C) (LSR(A, C) | LSL(A, 9-(C)))\r
300#define ROR_16(A, C) MASK_OUT_ABOVE_16(LSR(A, C) | LSL(A, 16-(C)))\r
301#define ROR_17(A, C) (LSR(A, C) | LSL(A, 17-(C)))\r
302#define ROR_32(A, C) MASK_OUT_ABOVE_32(LSR_32(A, C) | LSL_32(A, 32-(C)))\r
303#define ROR_33(A, C) (LSR_32(A, C) | LSL_32(A, 33-(C)))\r
304\r
305\r
306\r
307/* ------------------------------ CPU Access ------------------------------ */\r
308\r
309/* Access the CPU registers */\r
310#define CPU_TYPE m68ki_cpu.cpu_type\r
311\r
312#define REG_DA m68ki_cpu.dar /* easy access to data and address regs */\r
313#define REG_D m68ki_cpu.dar\r
314#define REG_A (m68ki_cpu.dar+8)\r
315#define REG_PPC m68ki_cpu.ppc\r
316#define REG_PC m68ki_cpu.pc\r
317#define REG_SP_BASE m68ki_cpu.sp\r
318#define REG_USP m68ki_cpu.sp[0]\r
319#define REG_ISP m68ki_cpu.sp[4]\r
320#define REG_MSP m68ki_cpu.sp[6]\r
321#define REG_SP m68ki_cpu.dar[15]\r
322#define REG_VBR m68ki_cpu.vbr\r
323#define REG_SFC m68ki_cpu.sfc\r
324#define REG_DFC m68ki_cpu.dfc\r
325#define REG_CACR m68ki_cpu.cacr\r
326#define REG_CAAR m68ki_cpu.caar\r
327#define REG_IR m68ki_cpu.ir\r
328\r
329#define REG_FP m68ki_cpu.fpr\r
330#define REG_FPCR m68ki_cpu.fpcr\r
331#define REG_FPSR m68ki_cpu.fpsr\r
332#define REG_FPIAR m68ki_cpu.fpiar\r
333\r
334#define FLAG_T1 m68ki_cpu.t1_flag\r
335#define FLAG_T0 m68ki_cpu.t0_flag\r
336#define FLAG_S m68ki_cpu.s_flag\r
337#define FLAG_M m68ki_cpu.m_flag\r
338#define FLAG_X m68ki_cpu.x_flag\r
339#define FLAG_N m68ki_cpu.n_flag\r
340#define FLAG_Z m68ki_cpu.not_z_flag\r
341#define FLAG_V m68ki_cpu.v_flag\r
342#define FLAG_C m68ki_cpu.c_flag\r
343#define FLAG_INT_MASK m68ki_cpu.int_mask\r
344\r
345#define CPU_INT_LEVEL m68ki_cpu.int_level /* ASG: changed from CPU_INTS_PENDING */\r
346#define CPU_INT_CYCLES m68ki_cpu.int_cycles /* ASG */\r
347#define CPU_STOPPED m68ki_cpu.stopped\r
348#define CPU_PREF_ADDR m68ki_cpu.pref_addr\r
349#define CPU_PREF_DATA m68ki_cpu.pref_data\r
350#define CPU_ADDRESS_MASK m68ki_cpu.address_mask\r
351#define CPU_SR_MASK m68ki_cpu.sr_mask\r
352#define CPU_INSTR_MODE m68ki_cpu.instr_mode\r
353#define CPU_RUN_MODE m68ki_cpu.run_mode\r
354\r
355#define CYC_INSTRUCTION m68ki_cpu.cyc_instruction\r
356#define CYC_EXCEPTION m68ki_cpu.cyc_exception\r
357#define CYC_BCC_NOTAKE_B m68ki_cpu.cyc_bcc_notake_b\r
358#define CYC_BCC_NOTAKE_W m68ki_cpu.cyc_bcc_notake_w\r
359#define CYC_DBCC_F_NOEXP m68ki_cpu.cyc_dbcc_f_noexp\r
360#define CYC_DBCC_F_EXP m68ki_cpu.cyc_dbcc_f_exp\r
361#define CYC_SCC_R_TRUE m68ki_cpu.cyc_scc_r_true\r
362#define CYC_MOVEM_W m68ki_cpu.cyc_movem_w\r
363#define CYC_MOVEM_L m68ki_cpu.cyc_movem_l\r
364#define CYC_SHIFT m68ki_cpu.cyc_shift\r
365#define CYC_RESET m68ki_cpu.cyc_reset\r
366\r
367\r
368#define CALLBACK_INT_ACK m68ki_cpu.int_ack_callback\r
369#define CALLBACK_BKPT_ACK m68ki_cpu.bkpt_ack_callback\r
370#define CALLBACK_RESET_INSTR m68ki_cpu.reset_instr_callback\r
371#define CALLBACK_CMPILD_INSTR m68ki_cpu.cmpild_instr_callback\r
372#define CALLBACK_RTE_INSTR m68ki_cpu.rte_instr_callback\r
373#define CALLBACK_TAS_INSTR m68ki_cpu.tas_instr_callback\r
374#define CALLBACK_PC_CHANGED m68ki_cpu.pc_changed_callback\r
375#define CALLBACK_SET_FC m68ki_cpu.set_fc_callback\r
376#define CALLBACK_INSTR_HOOK m68ki_cpu.instr_hook_callback\r
377\r
378\r
379\r
380/* ----------------------------- Configuration ---------------------------- */\r
381\r
382/* These defines are dependant on the configuration defines in m68kconf.h */\r
383\r
384/* Disable certain comparisons if we're not using all CPU types */\r
385#if M68K_EMULATE_040\r
386 #define CPU_TYPE_IS_040_PLUS(A) ((A) & CPU_TYPE_040)\r
387 #define CPU_TYPE_IS_040_LESS(A) 1\r
388#else\r
389 #define CPU_TYPE_IS_040_PLUS(A) 0\r
390 #define CPU_TYPE_IS_040_LESS(A) 1\r
391#endif\r
392\r
393#if M68K_EMULATE_020\r
394 #define CPU_TYPE_IS_020_PLUS(A) ((A) & (CPU_TYPE_020 | CPU_TYPE_040))\r
395 #define CPU_TYPE_IS_020_LESS(A) 1\r
396#else\r
397 #define CPU_TYPE_IS_020_PLUS(A) 0\r
398 #define CPU_TYPE_IS_020_LESS(A) 1\r
399#endif\r
400\r
401#if M68K_EMULATE_EC020\r
402 #define CPU_TYPE_IS_EC020_PLUS(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))\r
403 #define CPU_TYPE_IS_EC020_LESS(A) ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010 | CPU_TYPE_EC020))\r
404#else\r
405 #define CPU_TYPE_IS_EC020_PLUS(A) CPU_TYPE_IS_020_PLUS(A)\r
406 #define CPU_TYPE_IS_EC020_LESS(A) CPU_TYPE_IS_020_LESS(A)\r
407#endif\r
408\r
409#if M68K_EMULATE_010\r
410 #define CPU_TYPE_IS_010(A) ((A) == CPU_TYPE_010)\r
411 #define CPU_TYPE_IS_010_PLUS(A) ((A) & (CPU_TYPE_010 | CPU_TYPE_EC020 | CPU_TYPE_020 | CPU_TYPE_040))\r
412 #define CPU_TYPE_IS_010_LESS(A) ((A) & (CPU_TYPE_000 | CPU_TYPE_008 | CPU_TYPE_010))\r
413#else\r
414 #define CPU_TYPE_IS_010(A) 0\r
415 #define CPU_TYPE_IS_010_PLUS(A) CPU_TYPE_IS_EC020_PLUS(A)\r
416 #define CPU_TYPE_IS_010_LESS(A) CPU_TYPE_IS_EC020_LESS(A)\r
417#endif\r
418\r
419#if M68K_EMULATE_020 || M68K_EMULATE_EC020\r
420 #define CPU_TYPE_IS_020_VARIANT(A) ((A) & (CPU_TYPE_EC020 | CPU_TYPE_020))\r
421#else\r
422 #define CPU_TYPE_IS_020_VARIANT(A) 0\r
423#endif\r
424\r
425#if M68K_EMULATE_040 || M68K_EMULATE_020 || M68K_EMULATE_EC020 || M68K_EMULATE_010\r
426 #define CPU_TYPE_IS_000(A) ((A) == CPU_TYPE_000 || (A) == CPU_TYPE_008)\r
427#else\r
428 #define CPU_TYPE_IS_000(A) 1\r
429#endif\r
430\r
431\r
432#if !M68K_SEPARATE_READS\r
433#define m68k_read_immediate_16(A) m68ki_read_program_16(A)\r
434#define m68k_read_immediate_32(A) m68ki_read_program_32(A)\r
435\r
436#define m68k_read_pcrelative_8(A) m68ki_read_program_8(A)\r
437#define m68k_read_pcrelative_16(A) m68ki_read_program_16(A)\r
438#define m68k_read_pcrelative_32(A) m68ki_read_program_32(A)\r
439#endif /* M68K_SEPARATE_READS */\r
440\r
441\r
442/* Enable or disable callback functions */\r
443#if M68K_EMULATE_INT_ACK\r
444 #if M68K_EMULATE_INT_ACK == OPT_SPECIFY_HANDLER\r
445 #define m68ki_int_ack(A) M68K_INT_ACK_CALLBACK(A)\r
446 #else\r
447 #define m68ki_int_ack(A) CALLBACK_INT_ACK(A)\r
448 #endif\r
449#else\r
450 /* Default action is to used autovector mode, which is most common */\r
451 #define m68ki_int_ack(A) M68K_INT_ACK_AUTOVECTOR\r
452#endif /* M68K_EMULATE_INT_ACK */\r
453\r
454#if M68K_EMULATE_BKPT_ACK\r
455 #if M68K_EMULATE_BKPT_ACK == OPT_SPECIFY_HANDLER\r
456 #define m68ki_bkpt_ack(A) M68K_BKPT_ACK_CALLBACK(A)\r
457 #else\r
458 #define m68ki_bkpt_ack(A) CALLBACK_BKPT_ACK(A)\r
459 #endif\r
460#else\r
461 #define m68ki_bkpt_ack(A)\r
462#endif /* M68K_EMULATE_BKPT_ACK */\r
463\r
464#if M68K_EMULATE_RESET\r
465 #if M68K_EMULATE_RESET == OPT_SPECIFY_HANDLER\r
466 #define m68ki_output_reset() M68K_RESET_CALLBACK()\r
467 #else\r
468 #define m68ki_output_reset() CALLBACK_RESET_INSTR()\r
469 #endif\r
470#else\r
471 #define m68ki_output_reset()\r
472#endif /* M68K_EMULATE_RESET */\r
473\r
474#if M68K_CMPILD_HAS_CALLBACK\r
475 #if M68K_CMPILD_HAS_CALLBACK == OPT_SPECIFY_HANDLER\r
476 #define m68ki_cmpild_callback(v,r) M68K_CMPILD_CALLBACK(v,r)\r
477 #else\r
478 #define m68ki_cmpild_callback(v,r) CALLBACK_CMPILD_INSTR(v,r)\r
479 #endif\r
480#else\r
481 #define m68ki_cmpild_callback(v,r)\r
482#endif /* M68K_CMPILD_HAS_CALLBACK */\r
483\r
484#if M68K_RTE_HAS_CALLBACK\r
485 #if M68K_RTE_HAS_CALLBACK == OPT_SPECIFY_HANDLER\r
486 #define m68ki_rte_callback() M68K_RTE_CALLBACK()\r
487 #else\r
488 #define m68ki_rte_callback() CALLBACK_RTE_INSTR()\r
489 #endif\r
490#else\r
491 #define m68ki_rte_callback()\r
492#endif /* M68K_RTE_HAS_CALLBACK */\r
493\r
494#if M68K_TAS_HAS_CALLBACK\r
495 #if M68K_TAS_HAS_CALLBACK == OPT_SPECIFY_HANDLER\r
496 #define m68ki_tas_callback() M68K_TAS_CALLBACK()\r
497 #else\r
498 #define m68ki_tas_callback() CALLBACK_TAS_INSTR()\r
499 #endif\r
500#else\r
501 #define m68ki_tas_callback()\r
502#endif /* M68K_TAS_HAS_CALLBACK */\r
503\r
504\r
505#if M68K_INSTRUCTION_HOOK\r
506 #if M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER\r
507 #define m68ki_instr_hook() M68K_INSTRUCTION_CALLBACK()\r
508 #else\r
509 #define m68ki_instr_hook() CALLBACK_INSTR_HOOK()\r
510 #endif\r
511#else\r
512 #define m68ki_instr_hook()\r
513#endif /* M68K_INSTRUCTION_HOOK */\r
514\r
515#if M68K_MONITOR_PC\r
516 #if M68K_MONITOR_PC == OPT_SPECIFY_HANDLER\r
517 #define m68ki_pc_changed(A) M68K_SET_PC_CALLBACK(ADDRESS_68K(A))\r
518 #else\r
519 #define m68ki_pc_changed(A) CALLBACK_PC_CHANGED(ADDRESS_68K(A))\r
520 #endif\r
521#else\r
522 #define m68ki_pc_changed(A)\r
523#endif /* M68K_MONITOR_PC */\r
524\r
525\r
526/* Enable or disable function code emulation */\r
527#if M68K_EMULATE_FC\r
528 #if M68K_EMULATE_FC == OPT_SPECIFY_HANDLER\r
529 #define m68ki_set_fc(A) M68K_SET_FC_CALLBACK(A)\r
530 #else\r
531 #define m68ki_set_fc(A) CALLBACK_SET_FC(A)\r
532 #endif\r
533 #define m68ki_use_data_space() m68ki_address_space = FUNCTION_CODE_USER_DATA\r
534 #define m68ki_use_program_space() m68ki_address_space = FUNCTION_CODE_USER_PROGRAM\r
535 #define m68ki_get_address_space() m68ki_address_space\r
536#else\r
537 #define m68ki_set_fc(A)\r
538 #define m68ki_use_data_space()\r
539 #define m68ki_use_program_space()\r
540 #define m68ki_get_address_space() FUNCTION_CODE_USER_DATA\r
541#endif /* M68K_EMULATE_FC */\r
542\r
543\r
544/* Enable or disable trace emulation */\r
545#if M68K_EMULATE_TRACE\r
546 /* Initiates trace checking before each instruction (t1) */\r
547 #define m68ki_trace_t1() m68ki_tracing = FLAG_T1\r
548 /* adds t0 to trace checking if we encounter change of flow */\r
549 #define m68ki_trace_t0() m68ki_tracing |= FLAG_T0\r
550 /* Clear all tracing */\r
551 #define m68ki_clear_trace() m68ki_tracing = 0\r
552 /* Cause a trace exception if we are tracing */\r
553 #define m68ki_exception_if_trace() if(m68ki_tracing) m68ki_exception_trace()\r
554#else\r
555 #define m68ki_trace_t1()\r
556 #define m68ki_trace_t0()\r
557 #define m68ki_clear_trace()\r
558 #define m68ki_exception_if_trace()\r
559#endif /* M68K_EMULATE_TRACE */\r
560\r
561\r
562\r
563/* Address error */\r
564#if M68K_EMULATE_ADDRESS_ERROR\r
565 #include <setjmp.h>\r
566 extern jmp_buf m68ki_aerr_trap;\r
567\r
568 #define m68ki_set_address_error_trap() \\r
569 if(setjmp(m68ki_aerr_trap) != 0) \\r
570 { \\r
571 m68ki_exception_address_error(); \\r
572 if(CPU_STOPPED) \\r
573 { \\r
574 SET_CYCLES(0); \\r
575 CPU_INT_CYCLES = 0; \\r
576 return m68ki_initial_cycles; \\r
577 } \\r
578 }\r
579\r
580 #define m68ki_check_address_error(ADDR, WRITE_MODE, FC) \\r
581 if((ADDR)&1) \\r
582 { \\r
583 m68ki_aerr_address = ADDR; \\r
584 m68ki_aerr_write_mode = WRITE_MODE; \\r
585 m68ki_aerr_fc = FC; \\r
586 longjmp(m68ki_aerr_trap, 1); \\r
587 }\r
588\r
589 #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC) \\r
590 if (CPU_TYPE_IS_010_LESS(CPU_TYPE)) \\r
591 { \\r
592 m68ki_check_address_error(ADDR, WRITE_MODE, FC) \\r
593 }\r
594#else\r
595 #define m68ki_set_address_error_trap()\r
596 #define m68ki_check_address_error(ADDR, WRITE_MODE, FC)\r
597 #define m68ki_check_address_error_010_less(ADDR, WRITE_MODE, FC)\r
598#endif /* M68K_ADDRESS_ERROR */\r
599\r
600/* Logging */\r
601#if M68K_LOG_ENABLE\r
602 #include <stdio.h>\r
603 extern FILE* M68K_LOG_FILEHANDLE\r
604 extern char* m68ki_cpu_names[];\r
605\r
606 #define M68K_DO_LOG(A) if(M68K_LOG_FILEHANDLE) fprintf A\r
607 #if M68K_LOG_1010_1111\r
608 #define M68K_DO_LOG_EMU(A) if(M68K_LOG_FILEHANDLE) fprintf A\r
609 #else\r
610 #define M68K_DO_LOG_EMU(A)\r
611 #endif\r
612#else\r
613 #define M68K_DO_LOG(A)\r
614 #define M68K_DO_LOG_EMU(A)\r
615#endif\r
616\r
617\r
618\r
619/* -------------------------- EA / Operand Access ------------------------- */\r
620\r
621/*\r
622 * The general instruction format follows this pattern:\r
623 * .... XXX. .... .YYY\r
624 * where XXX is register X and YYY is register Y\r
625 */\r
626/* Data Register Isolation */\r
627#define DX (REG_D[(REG_IR >> 9) & 7])\r
628#define DY (REG_D[REG_IR & 7])\r
629/* Address Register Isolation */\r
630#define AX (REG_A[(REG_IR >> 9) & 7])\r
631#define AY (REG_A[REG_IR & 7])\r
632\r
633\r
634/* Effective Address Calculations */\r
635#define EA_AY_AI_8() AY /* address register indirect */\r
636#define EA_AY_AI_16() EA_AY_AI_8()\r
637#define EA_AY_AI_32() EA_AY_AI_8()\r
638#define EA_AY_PI_8() (AY++) /* postincrement (size = byte) */\r
639#define EA_AY_PI_16() ((AY+=2)-2) /* postincrement (size = word) */\r
640#define EA_AY_PI_32() ((AY+=4)-4) /* postincrement (size = long) */\r
641#define EA_AY_PD_8() (--AY) /* predecrement (size = byte) */\r
642#define EA_AY_PD_16() (AY-=2) /* predecrement (size = word) */\r
643#define EA_AY_PD_32() (AY-=4) /* predecrement (size = long) */\r
644#define EA_AY_DI_8() (AY+MAKE_INT_16(m68ki_read_imm_16())) /* displacement */\r
645#define EA_AY_DI_16() EA_AY_DI_8()\r
646#define EA_AY_DI_32() EA_AY_DI_8()\r
647#define EA_AY_IX_8() m68ki_get_ea_ix(AY) /* indirect + index */\r
648#define EA_AY_IX_16() EA_AY_IX_8()\r
649#define EA_AY_IX_32() EA_AY_IX_8()\r
650\r
651#define EA_AX_AI_8() AX\r
652#define EA_AX_AI_16() EA_AX_AI_8()\r
653#define EA_AX_AI_32() EA_AX_AI_8()\r
654#define EA_AX_PI_8() (AX++)\r
655#define EA_AX_PI_16() ((AX+=2)-2)\r
656#define EA_AX_PI_32() ((AX+=4)-4)\r
657#define EA_AX_PD_8() (--AX)\r
658#define EA_AX_PD_16() (AX-=2)\r
659#define EA_AX_PD_32() (AX-=4)\r
660#define EA_AX_DI_8() (AX+MAKE_INT_16(m68ki_read_imm_16()))\r
661#define EA_AX_DI_16() EA_AX_DI_8()\r
662#define EA_AX_DI_32() EA_AX_DI_8()\r
663#define EA_AX_IX_8() m68ki_get_ea_ix(AX)\r
664#define EA_AX_IX_16() EA_AX_IX_8()\r
665#define EA_AX_IX_32() EA_AX_IX_8()\r
666\r
667#define EA_A7_PI_8() ((REG_A[7]+=2)-2)\r
668#define EA_A7_PD_8() (REG_A[7]-=2)\r
669\r
670#define EA_AW_8() MAKE_INT_16(m68ki_read_imm_16()) /* absolute word */\r
671#define EA_AW_16() EA_AW_8()\r
672#define EA_AW_32() EA_AW_8()\r
673#define EA_AL_8() m68ki_read_imm_32() /* absolute long */\r
674#define EA_AL_16() EA_AL_8()\r
675#define EA_AL_32() EA_AL_8()\r
676#define EA_PCDI_8() m68ki_get_ea_pcdi() /* pc indirect + displacement */\r
677#define EA_PCDI_16() EA_PCDI_8()\r
678#define EA_PCDI_32() EA_PCDI_8()\r
679#define EA_PCIX_8() m68ki_get_ea_pcix() /* pc indirect + index */\r
680#define EA_PCIX_16() EA_PCIX_8()\r
681#define EA_PCIX_32() EA_PCIX_8()\r
682\r
683\r
684#define OPER_I_8() m68ki_read_imm_8()\r
685#define OPER_I_16() m68ki_read_imm_16()\r
686#define OPER_I_32() m68ki_read_imm_32()\r
687\r
688\r
689\r
690/* --------------------------- Status Register ---------------------------- */\r
691\r
692/* Flag Calculation Macros */\r
693#define CFLAG_8(A) (A)\r
694#define CFLAG_16(A) ((A)>>8)\r
695\r
696#if M68K_INT_GT_32_BIT\r
697 #define CFLAG_ADD_32(S, D, R) ((R)>>24)\r
698 #define CFLAG_SUB_32(S, D, R) ((R)>>24)\r
699#else\r
700 #define CFLAG_ADD_32(S, D, R) (((S & D) | (~R & (S | D)))>>23)\r
701 #define CFLAG_SUB_32(S, D, R) (((S & R) | (~D & (S | R)))>>23)\r
702#endif /* M68K_INT_GT_32_BIT */\r
703\r
704#define VFLAG_ADD_8(S, D, R) ((S^R) & (D^R))\r
705#define VFLAG_ADD_16(S, D, R) (((S^R) & (D^R))>>8)\r
706#define VFLAG_ADD_32(S, D, R) (((S^R) & (D^R))>>24)\r
707\r
708#define VFLAG_SUB_8(S, D, R) ((S^D) & (R^D))\r
709#define VFLAG_SUB_16(S, D, R) (((S^D) & (R^D))>>8)\r
710#define VFLAG_SUB_32(S, D, R) (((S^D) & (R^D))>>24)\r
711\r
712#define NFLAG_8(A) (A)\r
713#define NFLAG_16(A) ((A)>>8)\r
714#define NFLAG_32(A) ((A)>>24)\r
715#define NFLAG_64(A) ((A)>>56)\r
716\r
717#define ZFLAG_8(A) MASK_OUT_ABOVE_8(A)\r
718#define ZFLAG_16(A) MASK_OUT_ABOVE_16(A)\r
719#define ZFLAG_32(A) MASK_OUT_ABOVE_32(A)\r
720\r
721\r
722/* Flag values */\r
723#define NFLAG_SET 0x80\r
724#define NFLAG_CLEAR 0\r
725#define CFLAG_SET 0x100\r
726#define CFLAG_CLEAR 0\r
727#define XFLAG_SET 0x100\r
728#define XFLAG_CLEAR 0\r
729#define VFLAG_SET 0x80\r
730#define VFLAG_CLEAR 0\r
731#define ZFLAG_SET 0\r
732#define ZFLAG_CLEAR 0xffffffff\r
733\r
734#define SFLAG_SET 4\r
735#define SFLAG_CLEAR 0\r
736#define MFLAG_SET 2\r
737#define MFLAG_CLEAR 0\r
738\r
739/* Turn flag values into 1 or 0 */\r
740#define XFLAG_AS_1() ((FLAG_X>>8)&1)\r
741#define NFLAG_AS_1() ((FLAG_N>>7)&1)\r
742#define VFLAG_AS_1() ((FLAG_V>>7)&1)\r
743#define ZFLAG_AS_1() (!FLAG_Z)\r
744#define CFLAG_AS_1() ((FLAG_C>>8)&1)\r
745\r
746\r
747/* Conditions */\r
748#define COND_CS() (FLAG_C&0x100)\r
749#define COND_CC() (!COND_CS())\r
750#define COND_VS() (FLAG_V&0x80)\r
751#define COND_VC() (!COND_VS())\r
752#define COND_NE() FLAG_Z\r
753#define COND_EQ() (!COND_NE())\r
754#define COND_MI() (FLAG_N&0x80)\r
755#define COND_PL() (!COND_MI())\r
756#define COND_LT() ((FLAG_N^FLAG_V)&0x80)\r
757#define COND_GE() (!COND_LT())\r
758#define COND_HI() (COND_CC() && COND_NE())\r
759#define COND_LS() (COND_CS() || COND_EQ())\r
760#define COND_GT() (COND_GE() && COND_NE())\r
761#define COND_LE() (COND_LT() || COND_EQ())\r
762\r
763/* Reversed conditions */\r
764#define COND_NOT_CS() COND_CC()\r
765#define COND_NOT_CC() COND_CS()\r
766#define COND_NOT_VS() COND_VC()\r
767#define COND_NOT_VC() COND_VS()\r
768#define COND_NOT_NE() COND_EQ()\r
769#define COND_NOT_EQ() COND_NE()\r
770#define COND_NOT_MI() COND_PL()\r
771#define COND_NOT_PL() COND_MI()\r
772#define COND_NOT_LT() COND_GE()\r
773#define COND_NOT_GE() COND_LT()\r
774#define COND_NOT_HI() COND_LS()\r
775#define COND_NOT_LS() COND_HI()\r
776#define COND_NOT_GT() COND_LE()\r
777#define COND_NOT_LE() COND_GT()\r
778\r
779/* Not real conditions, but here for convenience */\r
780#define COND_XS() (FLAG_X&0x100)\r
781#define COND_XC() (!COND_XS)\r
782\r
783\r
784/* Get the condition code register */\r
785#define m68ki_get_ccr() ((COND_XS() >> 4) | \\r
786 (COND_MI() >> 4) | \\r
787 (COND_EQ() << 2) | \\r
788 (COND_VS() >> 6) | \\r
789 (COND_CS() >> 8))\r
790\r
791/* Get the status register */\r
792#define m68ki_get_sr() ( FLAG_T1 | \\r
793 FLAG_T0 | \\r
794 (FLAG_S << 11) | \\r
795 (FLAG_M << 11) | \\r
796 FLAG_INT_MASK | \\r
797 m68ki_get_ccr())\r
798\r
799\r
800\r
801/* ---------------------------- Cycle Counting ---------------------------- */\r
802\r
803#define ADD_CYCLES(A) m68ki_remaining_cycles += (A)\r
804#define USE_CYCLES(A) m68ki_remaining_cycles -= (A)\r
805#define SET_CYCLES(A) m68ki_remaining_cycles = A\r
806#define GET_CYCLES() m68ki_remaining_cycles\r
807#define USE_ALL_CYCLES() m68ki_remaining_cycles = 0\r
808\r
809\r
810\r
811/* ----------------------------- Read / Write ----------------------------- */\r
812\r
813/* Read from the current address space */\r
814#define m68ki_read_8(A) m68ki_read_8_fc (A, FLAG_S | m68ki_get_address_space())\r
815#define m68ki_read_16(A) m68ki_read_16_fc(A, FLAG_S | m68ki_get_address_space())\r
816#define m68ki_read_32(A) m68ki_read_32_fc(A, FLAG_S | m68ki_get_address_space())\r
817\r
818/* Write to the current data space */\r
819#define m68ki_write_8(A, V) m68ki_write_8_fc (A, FLAG_S | FUNCTION_CODE_USER_DATA, V)\r
820#define m68ki_write_16(A, V) m68ki_write_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)\r
821#define m68ki_write_32(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)\r
822\r
823#if M68K_SIMULATE_PD_WRITES\r
824#define m68ki_write_32_pd(A, V) m68ki_write_32_pd_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)\r
825#else\r
826#define m68ki_write_32_pd(A, V) m68ki_write_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA, V)\r
827#endif\r
828\r
829/* map read immediate 8 to read immediate 16 */\r
830#define m68ki_read_imm_8() MASK_OUT_ABOVE_8(m68ki_read_imm_16())\r
831\r
832/* Map PC-relative reads */\r
833#define m68ki_read_pcrel_8(A) m68k_read_pcrelative_8(A)\r
834#define m68ki_read_pcrel_16(A) m68k_read_pcrelative_16(A)\r
835#define m68ki_read_pcrel_32(A) m68k_read_pcrelative_32(A)\r
836\r
837/* Read from the program space */\r
838#define m68ki_read_program_8(A) m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)\r
839#define m68ki_read_program_16(A) m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)\r
840#define m68ki_read_program_32(A) m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_PROGRAM)\r
841\r
842/* Read from the data space */\r
843#define m68ki_read_data_8(A) m68ki_read_8_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)\r
844#define m68ki_read_data_16(A) m68ki_read_16_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)\r
845#define m68ki_read_data_32(A) m68ki_read_32_fc(A, FLAG_S | FUNCTION_CODE_USER_DATA)\r
846\r
847\r
848\r
849/* ======================================================================== */\r
850/* =============================== PROTOTYPES ============================= */\r
851/* ======================================================================== */\r
852\r
853typedef union\r
854{\r
855 UINT64 i;\r
856 double f;\r
857} fp_reg;\r
858\r
859typedef struct\r
860{\r
861 uint cpu_type; /* CPU Type: 68000, 68008, 68010, 68EC020, or 68020 */\r
862 uint dar[16]; /* Data and Address Registers */\r
863 uint ppc; /* Previous program counter */\r
864 uint pc; /* Program Counter */\r
865 uint sp[7]; /* User, Interrupt, and Master Stack Pointers */\r
866 uint vbr; /* Vector Base Register (m68010+) */\r
867 uint sfc; /* Source Function Code Register (m68010+) */\r
868 uint dfc; /* Destination Function Code Register (m68010+) */\r
869 uint cacr; /* Cache Control Register (m68020, unemulated) */\r
870 uint caar; /* Cache Address Register (m68020, unemulated) */\r
871 uint ir; /* Instruction Register */\r
872 fp_reg fpr[8]; /* FPU Data Register (m68040) */\r
873 uint fpiar; /* FPU Instruction Address Register (m68040) */\r
874 uint fpsr; /* FPU Status Register (m68040) */\r
875 uint fpcr; /* FPU Control Register (m68040) */\r
876 uint t1_flag; /* Trace 1 */\r
877 uint t0_flag; /* Trace 0 */\r
878 uint s_flag; /* Supervisor */\r
879 uint m_flag; /* Master/Interrupt state */\r
880 uint x_flag; /* Extend */\r
881 uint n_flag; /* Negative */\r
882 uint not_z_flag; /* Zero, inverted for speedups */\r
883 uint v_flag; /* Overflow */\r
884 uint c_flag; /* Carry */\r
885 uint int_mask; /* I0-I2 */\r
886 uint int_level; /* State of interrupt pins IPL0-IPL2 -- ASG: changed from ints_pending */\r
887 uint int_cycles; /* ASG: extra cycles from generated interrupts */\r
888 uint stopped; /* Stopped state */\r
889 uint pref_addr; /* Last prefetch address */\r
890 uint pref_data; /* Data in the prefetch queue */\r
891 uint address_mask; /* Available address pins */\r
892 uint sr_mask; /* Implemented status register bits */\r
893 uint instr_mode; /* Stores whether we are in instruction mode or group 0/1 exception mode */\r
894 uint run_mode; /* Stores whether we are processing a reset, bus error, address error, or something else */\r
895\r
896 /* Clocks required for instructions / exceptions */\r
897 uint cyc_bcc_notake_b;\r
898 uint cyc_bcc_notake_w;\r
899 uint cyc_dbcc_f_noexp;\r
900 uint cyc_dbcc_f_exp;\r
901 uint cyc_scc_r_true;\r
902 uint cyc_movem_w;\r
903 uint cyc_movem_l;\r
904 uint cyc_shift;\r
905 uint cyc_reset;\r
906 uint8* cyc_instruction;\r
907 uint8* cyc_exception;\r
908\r
909 /* Callbacks to host */\r
910 int (*int_ack_callback)(int int_line); /* Interrupt Acknowledge */\r
911 void (*bkpt_ack_callback)(unsigned int data); /* Breakpoint Acknowledge */\r
912 void (*reset_instr_callback)(void); /* Called when a RESET instruction is encountered */\r
913 void (*cmpild_instr_callback)(unsigned int, int); /* Called when a CMPI.L #v, Dn instruction is encountered */\r
914 void (*rte_instr_callback)(void); /* Called when a RTE instruction is encountered */\r
915 int (*tas_instr_callback)(void); /* Called when a TAS instruction is encountered, allows / disallows writeback */\r
916 void (*pc_changed_callback)(unsigned int new_pc); /* Called when the PC changes by a large amount */\r
917 void (*set_fc_callback)(unsigned int new_fc); /* Called when the CPU function code changes */\r
918 void (*instr_hook_callback)(void); /* Called every instruction cycle prior to execution */\r
919\r
920 // notaz\r
921 sint cyc_remaining_cycles;\r
922} m68ki_cpu_core;\r
923\r
924// notaz\r
925extern m68ki_cpu_core *m68ki_cpu_p;\r
926#define m68ki_cpu (*m68ki_cpu_p)\r
927#define m68ki_remaining_cycles m68ki_cpu_p->cyc_remaining_cycles\r
928\r
929\r
930//extern m68ki_cpu_core m68ki_cpu;\r
931//extern sint m68ki_remaining_cycles;\r
932extern uint m68ki_tracing;\r
933extern uint8 m68ki_shift_8_table[];\r
934extern uint16 m68ki_shift_16_table[];\r
935extern uint m68ki_shift_32_table[];\r
936extern uint8 m68ki_exception_cycle_table[][256];\r
937extern uint m68ki_address_space;\r
938extern uint8 m68ki_ea_idx_cycle_table[];\r
939\r
940extern uint m68ki_aerr_address;\r
941extern uint m68ki_aerr_write_mode;\r
942extern uint m68ki_aerr_fc;\r
943\r
944/* Read data immediately after the program counter */\r
945INLINE uint m68ki_read_imm_16(void);\r
946INLINE uint m68ki_read_imm_32(void);\r
947\r
948/* Read data with specific function code */\r
949INLINE uint m68ki_read_8_fc (uint address, uint fc);\r
950INLINE uint m68ki_read_16_fc (uint address, uint fc);\r
951INLINE uint m68ki_read_32_fc (uint address, uint fc);\r
952\r
953/* Write data with specific function code */\r
954INLINE void m68ki_write_8_fc (uint address, uint fc, uint value);\r
955INLINE void m68ki_write_16_fc(uint address, uint fc, uint value);\r
956INLINE void m68ki_write_32_fc(uint address, uint fc, uint value);\r
957#if M68K_SIMULATE_PD_WRITES\r
958INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value);\r
959#endif /* M68K_SIMULATE_PD_WRITES */\r
960\r
961/* Indexed and PC-relative ea fetching */\r
962INLINE uint m68ki_get_ea_pcdi(void);\r
963INLINE uint m68ki_get_ea_pcix(void);\r
964INLINE uint m68ki_get_ea_ix(uint An);\r
965\r
966/* Operand fetching */\r
967INLINE uint OPER_AY_AI_8(void);\r
968INLINE uint OPER_AY_AI_16(void);\r
969INLINE uint OPER_AY_AI_32(void);\r
970INLINE uint OPER_AY_PI_8(void);\r
971INLINE uint OPER_AY_PI_16(void);\r
972INLINE uint OPER_AY_PI_32(void);\r
973INLINE uint OPER_AY_PD_8(void);\r
974INLINE uint OPER_AY_PD_16(void);\r
975INLINE uint OPER_AY_PD_32(void);\r
976INLINE uint OPER_AY_DI_8(void);\r
977INLINE uint OPER_AY_DI_16(void);\r
978INLINE uint OPER_AY_DI_32(void);\r
979INLINE uint OPER_AY_IX_8(void);\r
980INLINE uint OPER_AY_IX_16(void);\r
981INLINE uint OPER_AY_IX_32(void);\r
982\r
983INLINE uint OPER_AX_AI_8(void);\r
984INLINE uint OPER_AX_AI_16(void);\r
985INLINE uint OPER_AX_AI_32(void);\r
986INLINE uint OPER_AX_PI_8(void);\r
987INLINE uint OPER_AX_PI_16(void);\r
988INLINE uint OPER_AX_PI_32(void);\r
989INLINE uint OPER_AX_PD_8(void);\r
990INLINE uint OPER_AX_PD_16(void);\r
991INLINE uint OPER_AX_PD_32(void);\r
992INLINE uint OPER_AX_DI_8(void);\r
993INLINE uint OPER_AX_DI_16(void);\r
994INLINE uint OPER_AX_DI_32(void);\r
995INLINE uint OPER_AX_IX_8(void);\r
996INLINE uint OPER_AX_IX_16(void);\r
997INLINE uint OPER_AX_IX_32(void);\r
998\r
999INLINE uint OPER_A7_PI_8(void);\r
1000INLINE uint OPER_A7_PD_8(void);\r
1001\r
1002INLINE uint OPER_AW_8(void);\r
1003INLINE uint OPER_AW_16(void);\r
1004INLINE uint OPER_AW_32(void);\r
1005INLINE uint OPER_AL_8(void);\r
1006INLINE uint OPER_AL_16(void);\r
1007INLINE uint OPER_AL_32(void);\r
1008INLINE uint OPER_PCDI_8(void);\r
1009INLINE uint OPER_PCDI_16(void);\r
1010INLINE uint OPER_PCDI_32(void);\r
1011INLINE uint OPER_PCIX_8(void);\r
1012INLINE uint OPER_PCIX_16(void);\r
1013INLINE uint OPER_PCIX_32(void);\r
1014\r
1015/* Stack operations */\r
1016INLINE void m68ki_push_16(uint value);\r
1017INLINE void m68ki_push_32(uint value);\r
1018INLINE uint m68ki_pull_16(void);\r
1019INLINE uint m68ki_pull_32(void);\r
1020\r
1021/* Program flow operations */\r
1022INLINE void m68ki_jump(uint new_pc);\r
1023INLINE void m68ki_jump_vector(uint vector);\r
1024INLINE void m68ki_branch_8(uint offset);\r
1025INLINE void m68ki_branch_16(uint offset);\r
1026INLINE void m68ki_branch_32(uint offset);\r
1027\r
1028/* Status register operations. */\r
1029INLINE void m68ki_set_s_flag(uint value); /* Only bit 2 of value should be set (i.e. 4 or 0) */\r
1030INLINE void m68ki_set_sm_flag(uint value); /* only bits 1 and 2 of value should be set */\r
1031INLINE void m68ki_set_ccr(uint value); /* set the condition code register */\r
1032INLINE void m68ki_set_sr(uint value); /* set the status register */\r
1033INLINE void m68ki_set_sr_noint(uint value); /* set the status register */\r
1034\r
1035/* Exception processing */\r
1036INLINE uint m68ki_init_exception(void); /* Initial exception processing */\r
1037\r
1038INLINE void m68ki_stack_frame_3word(uint pc, uint sr); /* Stack various frame types */\r
1039INLINE void m68ki_stack_frame_buserr(uint sr);\r
1040\r
1041INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector);\r
1042INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector);\r
1043INLINE void m68ki_stack_frame_0010(uint sr, uint vector);\r
1044INLINE void m68ki_stack_frame_1000(uint pc, uint sr, uint vector);\r
1045INLINE void m68ki_stack_frame_1010(uint sr, uint vector, uint pc);\r
1046INLINE void m68ki_stack_frame_1011(uint sr, uint vector, uint pc);\r
1047\r
1048INLINE void m68ki_exception_trap(uint vector);\r
1049INLINE void m68ki_exception_trapN(uint vector);\r
1050INLINE void m68ki_exception_trace(void);\r
1051INLINE void m68ki_exception_privilege_violation(void);\r
1052INLINE void m68ki_exception_1010(void);\r
1053INLINE void m68ki_exception_1111(void);\r
1054INLINE void m68ki_exception_illegal(void);\r
1055INLINE void m68ki_exception_format_error(void);\r
1056INLINE void m68ki_exception_address_error(void);\r
1057INLINE void m68ki_exception_interrupt(uint int_level);\r
1058INLINE void m68ki_check_interrupts(void); /* ASG: check for interrupts */\r
1059\r
1060/* quick disassembly (used for logging) */\r
1061char* m68ki_disassemble_quick(unsigned int pc, unsigned int cpu_type);\r
1062\r
1063\r
1064/* ======================================================================== */\r
1065/* =========================== UTILITY FUNCTIONS ========================== */\r
1066/* ======================================================================== */\r
1067\r
1068\r
1069/* ---------------------------- Read Immediate ---------------------------- */\r
1070\r
1071/* Handles all immediate reads, does address error check, function code setting,\r
1072 * and prefetching if they are enabled in m68kconf.h\r
1073 */\r
1074INLINE uint m68ki_read_imm_16(void)\r
1075{\r
1076 m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1077 m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1078#if M68K_EMULATE_PREFETCH\r
1079 if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)\r
1080 {\r
1081 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);\r
1082 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));\r
1083 }\r
1084 REG_PC += 2;\r
1085 return MASK_OUT_ABOVE_16(CPU_PREF_DATA >> ((2-((REG_PC-2)&2))<<3));\r
1086#else\r
1087 REG_PC += 2;\r
1088 return m68k_read_immediate_16(ADDRESS_68K(REG_PC-2));\r
1089#endif /* M68K_EMULATE_PREFETCH */\r
1090}\r
1091INLINE uint m68ki_read_imm_32(void)\r
1092{\r
1093#if M68K_EMULATE_PREFETCH\r
1094 uint temp_val;\r
1095\r
1096 m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1097 m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1098 if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)\r
1099 {\r
1100 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);\r
1101 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));\r
1102 }\r
1103 temp_val = CPU_PREF_DATA;\r
1104 REG_PC += 2;\r
1105 if(MASK_OUT_BELOW_2(REG_PC) != CPU_PREF_ADDR)\r
1106 {\r
1107 CPU_PREF_ADDR = MASK_OUT_BELOW_2(REG_PC);\r
1108 CPU_PREF_DATA = m68k_read_immediate_32(ADDRESS_68K(CPU_PREF_ADDR));\r
1109 temp_val = MASK_OUT_ABOVE_32((temp_val << 16) | (CPU_PREF_DATA >> 16));\r
1110 }\r
1111 REG_PC += 2;\r
1112\r
1113 return temp_val;\r
1114#else\r
1115 m68ki_set_fc(FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1116 m68ki_check_address_error(REG_PC, MODE_READ, FLAG_S | FUNCTION_CODE_USER_PROGRAM); /* auto-disable (see m68kcpu.h) */\r
1117 REG_PC += 4;\r
1118 return m68k_read_immediate_32(ADDRESS_68K(REG_PC-4));\r
1119#endif /* M68K_EMULATE_PREFETCH */\r
1120}\r
1121\r
1122\r
1123\r
1124/* ------------------------- Top level read/write ------------------------- */\r
1125\r
1126/* Handles all memory accesses (except for immediate reads if they are\r
1127 * configured to use separate functions in m68kconf.h).\r
1128 * All memory accesses must go through these top level functions.\r
1129 * These functions will also check for address error and set the function\r
1130 * code if they are enabled in m68kconf.h.\r
1131 */\r
1132INLINE uint m68ki_read_8_fc(uint address, uint fc)\r
1133{\r
1134 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1135 return m68k_read_memory_8(ADDRESS_68K(address));\r
1136}\r
1137INLINE uint m68ki_read_16_fc(uint address, uint fc)\r
1138{\r
1139 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1140 m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */\r
1141 return m68k_read_memory_16(ADDRESS_68K(address));\r
1142}\r
1143INLINE uint m68ki_read_32_fc(uint address, uint fc)\r
1144{\r
1145 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1146 m68ki_check_address_error_010_less(address, MODE_READ, fc); /* auto-disable (see m68kcpu.h) */\r
1147 return m68k_read_memory_32(ADDRESS_68K(address));\r
1148}\r
1149\r
1150INLINE void m68ki_write_8_fc(uint address, uint fc, uint value)\r
1151{\r
1152 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1153 m68k_write_memory_8(ADDRESS_68K(address), value);\r
1154}\r
1155INLINE void m68ki_write_16_fc(uint address, uint fc, uint value)\r
1156{\r
1157 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1158 m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */\r
1159 m68k_write_memory_16(ADDRESS_68K(address), value);\r
1160}\r
1161INLINE void m68ki_write_32_fc(uint address, uint fc, uint value)\r
1162{\r
1163 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1164 m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */\r
1165 m68k_write_memory_32(ADDRESS_68K(address), value);\r
1166}\r
1167\r
1168#if M68K_SIMULATE_PD_WRITES\r
1169INLINE void m68ki_write_32_pd_fc(uint address, uint fc, uint value)\r
1170{\r
1171 m68ki_set_fc(fc); /* auto-disable (see m68kcpu.h) */\r
1172 m68ki_check_address_error_010_less(address, MODE_WRITE, fc); /* auto-disable (see m68kcpu.h) */\r
1173 m68k_write_memory_32_pd(ADDRESS_68K(address), value);\r
1174}\r
1175#endif\r
1176\r
1177\r
1178/* --------------------- Effective Address Calculation -------------------- */\r
1179\r
1180/* The program counter relative addressing modes cause operands to be\r
1181 * retrieved from program space, not data space.\r
1182 */\r
1183INLINE uint m68ki_get_ea_pcdi(void)\r
1184{\r
1185 uint old_pc = REG_PC;\r
1186 m68ki_use_program_space(); /* auto-disable */\r
1187 return old_pc + MAKE_INT_16(m68ki_read_imm_16());\r
1188}\r
1189\r
1190\r
1191INLINE uint m68ki_get_ea_pcix(void)\r
1192{\r
1193 m68ki_use_program_space(); /* auto-disable */\r
1194 return m68ki_get_ea_ix(REG_PC);\r
1195}\r
1196\r
1197/* Indexed addressing modes are encoded as follows:\r
1198 *\r
1199 * Base instruction format:\r
1200 * F E D C B A 9 8 7 6 | 5 4 3 | 2 1 0\r
1201 * x x x x x x x x x x | 1 1 0 | BASE REGISTER (An)\r
1202 *\r
1203 * Base instruction format for destination EA in move instructions:\r
1204 * F E D C | B A 9 | 8 7 6 | 5 4 3 2 1 0\r
1205 * x x x x | BASE REG | 1 1 0 | X X X X X X (An)\r
1206 *\r
1207 * Brief extension format:\r
1208 * F | E D C | B | A 9 | 8 | 7 6 5 4 3 2 1 0\r
1209 * D/A | REGISTER | W/L | SCALE | 0 | DISPLACEMENT\r
1210 *\r
1211 * Full extension format:\r
1212 * F E D C B A 9 8 7 6 5 4 3 2 1 0\r
1213 * D/A | REGISTER | W/L | SCALE | 1 | BS | IS | BD SIZE | 0 | I/IS\r
1214 * BASE DISPLACEMENT (0, 16, 32 bit) (bd)\r
1215 * OUTER DISPLACEMENT (0, 16, 32 bit) (od)\r
1216 *\r
1217 * D/A: 0 = Dn, 1 = An (Xn)\r
1218 * W/L: 0 = W (sign extend), 1 = L (.SIZE)\r
1219 * SCALE: 00=1, 01=2, 10=4, 11=8 (*SCALE)\r
1220 * BS: 0=add base reg, 1=suppress base reg (An suppressed)\r
1221 * IS: 0=add index, 1=suppress index (Xn suppressed)\r
1222 * BD SIZE: 00=reserved, 01=NULL, 10=Word, 11=Long (size of bd)\r
1223 *\r
1224 * IS I/IS Operation\r
1225 * 0 000 No Memory Indirect\r
1226 * 0 001 indir prex with null outer\r
1227 * 0 010 indir prex with word outer\r
1228 * 0 011 indir prex with long outer\r
1229 * 0 100 reserved\r
1230 * 0 101 indir postx with null outer\r
1231 * 0 110 indir postx with word outer\r
1232 * 0 111 indir postx with long outer\r
1233 * 1 000 no memory indirect\r
1234 * 1 001 mem indir with null outer\r
1235 * 1 010 mem indir with word outer\r
1236 * 1 011 mem indir with long outer\r
1237 * 1 100-111 reserved\r
1238 */\r
1239INLINE uint m68ki_get_ea_ix(uint An)\r
1240{\r
1241 /* An = base register */\r
1242 uint extension = m68ki_read_imm_16();\r
1243 uint Xn = 0; /* Index register */\r
1244 uint bd = 0; /* Base Displacement */\r
1245 uint od = 0; /* Outer Displacement */\r
1246\r
1247 if(CPU_TYPE_IS_010_LESS(CPU_TYPE))\r
1248 {\r
1249 /* Calculate index */\r
1250 Xn = REG_DA[extension>>12]; /* Xn */\r
1251 if(!BIT_B(extension)) /* W/L */\r
1252 Xn = MAKE_INT_16(Xn);\r
1253\r
1254 /* Add base register and displacement and return */\r
1255 return An + Xn + MAKE_INT_8(extension);\r
1256 }\r
1257\r
1258 /* Brief extension format */\r
1259 if(!BIT_8(extension))\r
1260 {\r
1261 /* Calculate index */\r
1262 Xn = REG_DA[extension>>12]; /* Xn */\r
1263 if(!BIT_B(extension)) /* W/L */\r
1264 Xn = MAKE_INT_16(Xn);\r
1265 /* Add scale if proper CPU type */\r
1266 if(CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))\r
1267 Xn <<= (extension>>9) & 3; /* SCALE */\r
1268\r
1269 /* Add base register and displacement and return */\r
1270 return An + Xn + MAKE_INT_8(extension);\r
1271 }\r
1272\r
1273 /* Full extension format */\r
1274\r
1275 USE_CYCLES(m68ki_ea_idx_cycle_table[extension&0x3f]);\r
1276\r
1277 /* Check if base register is present */\r
1278 if(BIT_7(extension)) /* BS */\r
1279 An = 0; /* An */\r
1280\r
1281 /* Check if index is present */\r
1282 if(!BIT_6(extension)) /* IS */\r
1283 {\r
1284 Xn = REG_DA[extension>>12]; /* Xn */\r
1285 if(!BIT_B(extension)) /* W/L */\r
1286 Xn = MAKE_INT_16(Xn);\r
1287 Xn <<= (extension>>9) & 3; /* SCALE */\r
1288 }\r
1289\r
1290 /* Check if base displacement is present */\r
1291 if(BIT_5(extension)) /* BD SIZE */\r
1292 bd = BIT_4(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());\r
1293\r
1294 /* If no indirect action, we are done */\r
1295 if(!(extension&7)) /* No Memory Indirect */\r
1296 return An + bd + Xn;\r
1297\r
1298 /* Check if outer displacement is present */\r
1299 if(BIT_1(extension)) /* I/IS: od */\r
1300 od = BIT_0(extension) ? m68ki_read_imm_32() : MAKE_INT_16(m68ki_read_imm_16());\r
1301\r
1302 /* Postindex */\r
1303 if(BIT_2(extension)) /* I/IS: 0 = preindex, 1 = postindex */\r
1304 return m68ki_read_32(An + bd) + Xn + od;\r
1305\r
1306 /* Preindex */\r
1307 return m68ki_read_32(An + bd + Xn) + od;\r
1308}\r
1309\r
1310\r
1311/* Fetch operands */\r
1312INLINE uint OPER_AY_AI_8(void) {uint ea = EA_AY_AI_8(); return m68ki_read_8(ea); }\r
1313INLINE uint OPER_AY_AI_16(void) {uint ea = EA_AY_AI_16(); return m68ki_read_16(ea);}\r
1314INLINE uint OPER_AY_AI_32(void) {uint ea = EA_AY_AI_32(); return m68ki_read_32(ea);}\r
1315INLINE uint OPER_AY_PI_8(void) {uint ea = EA_AY_PI_8(); return m68ki_read_8(ea); }\r
1316INLINE uint OPER_AY_PI_16(void) {uint ea = EA_AY_PI_16(); return m68ki_read_16(ea);}\r
1317INLINE uint OPER_AY_PI_32(void) {uint ea = EA_AY_PI_32(); return m68ki_read_32(ea);}\r
1318INLINE uint OPER_AY_PD_8(void) {uint ea = EA_AY_PD_8(); return m68ki_read_8(ea); }\r
1319INLINE uint OPER_AY_PD_16(void) {uint ea = EA_AY_PD_16(); return m68ki_read_16(ea);}\r
1320INLINE uint OPER_AY_PD_32(void) {uint ea = EA_AY_PD_32(); return m68ki_read_32(ea);}\r
1321INLINE uint OPER_AY_DI_8(void) {uint ea = EA_AY_DI_8(); return m68ki_read_8(ea); }\r
1322INLINE uint OPER_AY_DI_16(void) {uint ea = EA_AY_DI_16(); return m68ki_read_16(ea);}\r
1323INLINE uint OPER_AY_DI_32(void) {uint ea = EA_AY_DI_32(); return m68ki_read_32(ea);}\r
1324INLINE uint OPER_AY_IX_8(void) {uint ea = EA_AY_IX_8(); return m68ki_read_8(ea); }\r
1325INLINE uint OPER_AY_IX_16(void) {uint ea = EA_AY_IX_16(); return m68ki_read_16(ea);}\r
1326INLINE uint OPER_AY_IX_32(void) {uint ea = EA_AY_IX_32(); return m68ki_read_32(ea);}\r
1327\r
1328INLINE uint OPER_AX_AI_8(void) {uint ea = EA_AX_AI_8(); return m68ki_read_8(ea); }\r
1329INLINE uint OPER_AX_AI_16(void) {uint ea = EA_AX_AI_16(); return m68ki_read_16(ea);}\r
1330INLINE uint OPER_AX_AI_32(void) {uint ea = EA_AX_AI_32(); return m68ki_read_32(ea);}\r
1331INLINE uint OPER_AX_PI_8(void) {uint ea = EA_AX_PI_8(); return m68ki_read_8(ea); }\r
1332INLINE uint OPER_AX_PI_16(void) {uint ea = EA_AX_PI_16(); return m68ki_read_16(ea);}\r
1333INLINE uint OPER_AX_PI_32(void) {uint ea = EA_AX_PI_32(); return m68ki_read_32(ea);}\r
1334INLINE uint OPER_AX_PD_8(void) {uint ea = EA_AX_PD_8(); return m68ki_read_8(ea); }\r
1335INLINE uint OPER_AX_PD_16(void) {uint ea = EA_AX_PD_16(); return m68ki_read_16(ea);}\r
1336INLINE uint OPER_AX_PD_32(void) {uint ea = EA_AX_PD_32(); return m68ki_read_32(ea);}\r
1337INLINE uint OPER_AX_DI_8(void) {uint ea = EA_AX_DI_8(); return m68ki_read_8(ea); }\r
1338INLINE uint OPER_AX_DI_16(void) {uint ea = EA_AX_DI_16(); return m68ki_read_16(ea);}\r
1339INLINE uint OPER_AX_DI_32(void) {uint ea = EA_AX_DI_32(); return m68ki_read_32(ea);}\r
1340INLINE uint OPER_AX_IX_8(void) {uint ea = EA_AX_IX_8(); return m68ki_read_8(ea); }\r
1341INLINE uint OPER_AX_IX_16(void) {uint ea = EA_AX_IX_16(); return m68ki_read_16(ea);}\r
1342INLINE uint OPER_AX_IX_32(void) {uint ea = EA_AX_IX_32(); return m68ki_read_32(ea);}\r
1343\r
1344INLINE uint OPER_A7_PI_8(void) {uint ea = EA_A7_PI_8(); return m68ki_read_8(ea); }\r
1345INLINE uint OPER_A7_PD_8(void) {uint ea = EA_A7_PD_8(); return m68ki_read_8(ea); }\r
1346\r
1347INLINE uint OPER_AW_8(void) {uint ea = EA_AW_8(); return m68ki_read_8(ea); }\r
1348INLINE uint OPER_AW_16(void) {uint ea = EA_AW_16(); return m68ki_read_16(ea);}\r
1349INLINE uint OPER_AW_32(void) {uint ea = EA_AW_32(); return m68ki_read_32(ea);}\r
1350INLINE uint OPER_AL_8(void) {uint ea = EA_AL_8(); return m68ki_read_8(ea); }\r
1351INLINE uint OPER_AL_16(void) {uint ea = EA_AL_16(); return m68ki_read_16(ea);}\r
1352INLINE uint OPER_AL_32(void) {uint ea = EA_AL_32(); return m68ki_read_32(ea);}\r
1353INLINE uint OPER_PCDI_8(void) {uint ea = EA_PCDI_8(); return m68ki_read_pcrel_8(ea); }\r
1354INLINE uint OPER_PCDI_16(void) {uint ea = EA_PCDI_16(); return m68ki_read_pcrel_16(ea);}\r
1355INLINE uint OPER_PCDI_32(void) {uint ea = EA_PCDI_32(); return m68ki_read_pcrel_32(ea);}\r
1356INLINE uint OPER_PCIX_8(void) {uint ea = EA_PCIX_8(); return m68ki_read_pcrel_8(ea); }\r
1357INLINE uint OPER_PCIX_16(void) {uint ea = EA_PCIX_16(); return m68ki_read_pcrel_16(ea);}\r
1358INLINE uint OPER_PCIX_32(void) {uint ea = EA_PCIX_32(); return m68ki_read_pcrel_32(ea);}\r
1359\r
1360\r
1361\r
1362/* ---------------------------- Stack Functions --------------------------- */\r
1363\r
1364/* Push/pull data from the stack */\r
1365INLINE void m68ki_push_16(uint value)\r
1366{\r
1367 REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);\r
1368 m68ki_write_16(REG_SP, value);\r
1369}\r
1370\r
1371INLINE void m68ki_push_32(uint value)\r
1372{\r
1373 REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);\r
1374 m68ki_write_32(REG_SP, value);\r
1375}\r
1376\r
1377INLINE uint m68ki_pull_16(void)\r
1378{\r
1379 REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);\r
1380 return m68ki_read_16(REG_SP-2);\r
1381}\r
1382\r
1383INLINE uint m68ki_pull_32(void)\r
1384{\r
1385 REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);\r
1386 return m68ki_read_32(REG_SP-4);\r
1387}\r
1388\r
1389\r
1390/* Increment/decrement the stack as if doing a push/pull but\r
1391 * don't do any memory access.\r
1392 */\r
1393INLINE void m68ki_fake_push_16(void)\r
1394{\r
1395 REG_SP = MASK_OUT_ABOVE_32(REG_SP - 2);\r
1396}\r
1397\r
1398INLINE void m68ki_fake_push_32(void)\r
1399{\r
1400 REG_SP = MASK_OUT_ABOVE_32(REG_SP - 4);\r
1401}\r
1402\r
1403INLINE void m68ki_fake_pull_16(void)\r
1404{\r
1405 REG_SP = MASK_OUT_ABOVE_32(REG_SP + 2);\r
1406}\r
1407\r
1408INLINE void m68ki_fake_pull_32(void)\r
1409{\r
1410 REG_SP = MASK_OUT_ABOVE_32(REG_SP + 4);\r
1411}\r
1412\r
1413\r
1414/* ----------------------------- Program Flow ----------------------------- */\r
1415\r
1416/* Jump to a new program location or vector.\r
1417 * These functions will also call the pc_changed callback if it was enabled\r
1418 * in m68kconf.h.\r
1419 */\r
1420INLINE void m68ki_jump(uint new_pc)\r
1421{\r
1422 REG_PC = new_pc;\r
1423 m68ki_pc_changed(REG_PC);\r
1424}\r
1425\r
1426INLINE void m68ki_jump_vector(uint vector)\r
1427{\r
1428 REG_PC = (vector<<2) + REG_VBR;\r
1429 REG_PC = m68ki_read_data_32(REG_PC);\r
1430 m68ki_pc_changed(REG_PC);\r
1431}\r
1432\r
1433\r
1434/* Branch to a new memory location.\r
1435 * The 32-bit branch will call pc_changed if it was enabled in m68kconf.h.\r
1436 * So far I've found no problems with not calling pc_changed for 8 or 16\r
1437 * bit branches.\r
1438 */\r
1439INLINE void m68ki_branch_8(uint offset)\r
1440{\r
1441 REG_PC += MAKE_INT_8(offset);\r
1442}\r
1443\r
1444INLINE void m68ki_branch_16(uint offset)\r
1445{\r
1446 REG_PC += MAKE_INT_16(offset);\r
1447}\r
1448\r
1449INLINE void m68ki_branch_32(uint offset)\r
1450{\r
1451 REG_PC += offset;\r
1452 m68ki_pc_changed(REG_PC);\r
1453}\r
1454\r
1455\r
1456\r
1457/* ---------------------------- Status Register --------------------------- */\r
1458\r
1459/* Set the S flag and change the active stack pointer.\r
1460 * Note that value MUST be 4 or 0.\r
1461 */\r
1462INLINE void m68ki_set_s_flag(uint value)\r
1463{\r
1464 /* Backup the old stack pointer */\r
1465 REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;\r
1466 /* Set the S flag */\r
1467 FLAG_S = value;\r
1468 /* Set the new stack pointer */\r
1469 REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];\r
1470}\r
1471\r
1472/* Set the S and M flags and change the active stack pointer.\r
1473 * Note that value MUST be 0, 2, 4, or 6 (bit2 = S, bit1 = M).\r
1474 */\r
1475INLINE void m68ki_set_sm_flag(uint value)\r
1476{\r
1477 /* Backup the old stack pointer */\r
1478 REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)] = REG_SP;\r
1479 /* Set the S and M flags */\r
1480 FLAG_S = value & SFLAG_SET;\r
1481 FLAG_M = value & MFLAG_SET;\r
1482 /* Set the new stack pointer */\r
1483 REG_SP = REG_SP_BASE[FLAG_S | ((FLAG_S>>1) & FLAG_M)];\r
1484}\r
1485\r
1486/* Set the S and M flags. Don't touch the stack pointer. */\r
1487INLINE void m68ki_set_sm_flag_nosp(uint value)\r
1488{\r
1489 /* Set the S and M flags */\r
1490 FLAG_S = value & SFLAG_SET;\r
1491 FLAG_M = value & MFLAG_SET;\r
1492}\r
1493\r
1494\r
1495/* Set the condition code register */\r
1496INLINE void m68ki_set_ccr(uint value)\r
1497{\r
1498 FLAG_X = BIT_4(value) << 4;\r
1499 FLAG_N = BIT_3(value) << 4;\r
1500 FLAG_Z = !BIT_2(value);\r
1501 FLAG_V = BIT_1(value) << 6;\r
1502 FLAG_C = BIT_0(value) << 8;\r
1503}\r
1504\r
1505/* Set the status register but don't check for interrupts */\r
1506INLINE void m68ki_set_sr_noint(uint value)\r
1507{\r
1508 /* Mask out the "unimplemented" bits */\r
1509 value &= CPU_SR_MASK;\r
1510\r
1511 /* Now set the status register */\r
1512 FLAG_T1 = BIT_F(value);\r
1513 FLAG_T0 = BIT_E(value);\r
1514 FLAG_INT_MASK = value & 0x0700;\r
1515 m68ki_set_ccr(value);\r
1516 m68ki_set_sm_flag((value >> 11) & 6);\r
1517}\r
1518\r
1519/* Set the status register but don't check for interrupts nor\r
1520 * change the stack pointer\r
1521 */\r
1522INLINE void m68ki_set_sr_noint_nosp(uint value)\r
1523{\r
1524 /* Mask out the "unimplemented" bits */\r
1525 value &= CPU_SR_MASK;\r
1526\r
1527 /* Now set the status register */\r
1528 FLAG_T1 = BIT_F(value);\r
1529 FLAG_T0 = BIT_E(value);\r
1530 FLAG_INT_MASK = value & 0x0700;\r
1531 m68ki_set_ccr(value);\r
1532 m68ki_set_sm_flag_nosp((value >> 11) & 6);\r
1533}\r
1534\r
1535/* Set the status register and check for interrupts */\r
1536INLINE void m68ki_set_sr(uint value)\r
1537{\r
1538 m68ki_set_sr_noint(value);\r
1539 if (GET_CYCLES() >= 0) // notaz\r
1540 m68ki_check_interrupts();\r
1541}\r
1542\r
1543\r
1544/* ------------------------- Exception Processing ------------------------- */\r
1545\r
1546/* Initiate exception processing */\r
1547INLINE uint m68ki_init_exception(void)\r
1548{\r
1549 /* Save the old status register */\r
1550 uint sr = m68ki_get_sr();\r
1551\r
1552 /* Turn off trace flag, clear pending traces */\r
1553 FLAG_T1 = FLAG_T0 = 0;\r
1554 m68ki_clear_trace();\r
1555 /* Enter supervisor mode */\r
1556 m68ki_set_s_flag(SFLAG_SET);\r
1557\r
1558 return sr;\r
1559}\r
1560\r
1561/* 3 word stack frame (68000 only) */\r
1562INLINE void m68ki_stack_frame_3word(uint pc, uint sr)\r
1563{\r
1564 m68ki_push_32(pc);\r
1565 m68ki_push_16(sr);\r
1566}\r
1567\r
1568/* Format 0 stack frame.\r
1569 * This is the standard stack frame for 68010+.\r
1570 */\r
1571INLINE void m68ki_stack_frame_0000(uint pc, uint sr, uint vector)\r
1572{\r
1573 /* Stack a 3-word frame if we are 68000 */\r
1574 if(CPU_TYPE == CPU_TYPE_000 || CPU_TYPE == CPU_TYPE_008)\r
1575 {\r
1576 m68ki_stack_frame_3word(pc, sr);\r
1577 return;\r
1578 }\r
1579 m68ki_push_16(vector<<2);\r
1580 m68ki_push_32(pc);\r
1581 m68ki_push_16(sr);\r
1582}\r
1583\r
1584/* Format 1 stack frame (68020).\r
1585 * For 68020, this is the 4 word throwaway frame.\r
1586 */\r
1587INLINE void m68ki_stack_frame_0001(uint pc, uint sr, uint vector)\r
1588{\r
1589 m68ki_push_16(0x1000 | (vector<<2));\r
1590 m68ki_push_32(pc);\r
1591 m68ki_push_16(sr);\r
1592}\r
1593\r
1594/* Format 2 stack frame.\r
1595 * This is used only by 68020 for trap exceptions.\r
1596 */\r
1597INLINE void m68ki_stack_frame_0010(uint sr, uint vector)\r
1598{\r
1599 m68ki_push_32(REG_PPC);\r
1600 m68ki_push_16(0x2000 | (vector<<2));\r
1601 m68ki_push_32(REG_PC);\r
1602 m68ki_push_16(sr);\r
1603}\r
1604\r
1605\r
1606/* Bus error stack frame (68000 only).\r
1607 */\r
1608INLINE void m68ki_stack_frame_buserr(uint sr)\r
1609{\r
1610 m68ki_push_32(REG_PC);\r
1611 m68ki_push_16(sr);\r
1612 m68ki_push_16(REG_IR);\r
1613 m68ki_push_32(m68ki_aerr_address); /* access address */\r
1614 /* 0 0 0 0 0 0 0 0 0 0 0 R/W I/N FC\r
1615 * R/W 0 = write, 1 = read\r
1616 * I/N 0 = instruction, 1 = not\r
1617 * FC 3-bit function code\r
1618 */\r
1619 m68ki_push_16(m68ki_aerr_write_mode | CPU_INSTR_MODE | m68ki_aerr_fc);\r
1620}\r
1621\r
1622/* Format 8 stack frame (68010).\r
1623 * 68010 only. This is the 29 word bus/address error frame.\r
1624 */\r
1625void m68ki_stack_frame_1000(uint pc, uint sr, uint vector)\r
1626{\r
1627 /* VERSION\r
1628 * NUMBER\r
1629 * INTERNAL INFORMATION, 16 WORDS\r
1630 */\r
1631 m68ki_fake_push_32();\r
1632 m68ki_fake_push_32();\r
1633 m68ki_fake_push_32();\r
1634 m68ki_fake_push_32();\r
1635 m68ki_fake_push_32();\r
1636 m68ki_fake_push_32();\r
1637 m68ki_fake_push_32();\r
1638 m68ki_fake_push_32();\r
1639\r
1640 /* INSTRUCTION INPUT BUFFER */\r
1641 m68ki_push_16(0);\r
1642\r
1643 /* UNUSED, RESERVED (not written) */\r
1644 m68ki_fake_push_16();\r
1645\r
1646 /* DATA INPUT BUFFER */\r
1647 m68ki_push_16(0);\r
1648\r
1649 /* UNUSED, RESERVED (not written) */\r
1650 m68ki_fake_push_16();\r
1651\r
1652 /* DATA OUTPUT BUFFER */\r
1653 m68ki_push_16(0);\r
1654\r
1655 /* UNUSED, RESERVED (not written) */\r
1656 m68ki_fake_push_16();\r
1657\r
1658 /* FAULT ADDRESS */\r
1659 m68ki_push_32(0);\r
1660\r
1661 /* SPECIAL STATUS WORD */\r
1662 m68ki_push_16(0);\r
1663\r
1664 /* 1000, VECTOR OFFSET */\r
1665 m68ki_push_16(0x8000 | (vector<<2));\r
1666\r
1667 /* PROGRAM COUNTER */\r
1668 m68ki_push_32(pc);\r
1669\r
1670 /* STATUS REGISTER */\r
1671 m68ki_push_16(sr);\r
1672}\r
1673\r
1674/* Format A stack frame (short bus fault).\r
1675 * This is used only by 68020 for bus fault and address error\r
1676 * if the error happens at an instruction boundary.\r
1677 * PC stacked is address of next instruction.\r
1678 */\r
1679void m68ki_stack_frame_1010(uint sr, uint vector, uint pc)\r
1680{\r
1681 /* INTERNAL REGISTER */\r
1682 m68ki_push_16(0);\r
1683\r
1684 /* INTERNAL REGISTER */\r
1685 m68ki_push_16(0);\r
1686\r
1687 /* DATA OUTPUT BUFFER (2 words) */\r
1688 m68ki_push_32(0);\r
1689\r
1690 /* INTERNAL REGISTER */\r
1691 m68ki_push_16(0);\r
1692\r
1693 /* INTERNAL REGISTER */\r
1694 m68ki_push_16(0);\r
1695\r
1696 /* DATA CYCLE FAULT ADDRESS (2 words) */\r
1697 m68ki_push_32(0);\r
1698\r
1699 /* INSTRUCTION PIPE STAGE B */\r
1700 m68ki_push_16(0);\r
1701\r
1702 /* INSTRUCTION PIPE STAGE C */\r
1703 m68ki_push_16(0);\r
1704\r
1705 /* SPECIAL STATUS REGISTER */\r
1706 m68ki_push_16(0);\r
1707\r
1708 /* INTERNAL REGISTER */\r
1709 m68ki_push_16(0);\r
1710\r
1711 /* 1010, VECTOR OFFSET */\r
1712 m68ki_push_16(0xa000 | (vector<<2));\r
1713\r
1714 /* PROGRAM COUNTER */\r
1715 m68ki_push_32(pc);\r
1716\r
1717 /* STATUS REGISTER */\r
1718 m68ki_push_16(sr);\r
1719}\r
1720\r
1721/* Format B stack frame (long bus fault).\r
1722 * This is used only by 68020 for bus fault and address error\r
1723 * if the error happens during instruction execution.\r
1724 * PC stacked is address of instruction in progress.\r
1725 */\r
1726void m68ki_stack_frame_1011(uint sr, uint vector, uint pc)\r
1727{\r
1728 /* INTERNAL REGISTERS (18 words) */\r
1729 m68ki_push_32(0);\r
1730 m68ki_push_32(0);\r
1731 m68ki_push_32(0);\r
1732 m68ki_push_32(0);\r
1733 m68ki_push_32(0);\r
1734 m68ki_push_32(0);\r
1735 m68ki_push_32(0);\r
1736 m68ki_push_32(0);\r
1737 m68ki_push_32(0);\r
1738\r
1739 /* VERSION# (4 bits), INTERNAL INFORMATION */\r
1740 m68ki_push_16(0);\r
1741\r
1742 /* INTERNAL REGISTERS (3 words) */\r
1743 m68ki_push_32(0);\r
1744 m68ki_push_16(0);\r
1745\r
1746 /* DATA INTPUT BUFFER (2 words) */\r
1747 m68ki_push_32(0);\r
1748\r
1749 /* INTERNAL REGISTERS (2 words) */\r
1750 m68ki_push_32(0);\r
1751\r
1752 /* STAGE B ADDRESS (2 words) */\r
1753 m68ki_push_32(0);\r
1754\r
1755 /* INTERNAL REGISTER (4 words) */\r
1756 m68ki_push_32(0);\r
1757 m68ki_push_32(0);\r
1758\r
1759 /* DATA OUTPUT BUFFER (2 words) */\r
1760 m68ki_push_32(0);\r
1761\r
1762 /* INTERNAL REGISTER */\r
1763 m68ki_push_16(0);\r
1764\r
1765 /* INTERNAL REGISTER */\r
1766 m68ki_push_16(0);\r
1767\r
1768 /* DATA CYCLE FAULT ADDRESS (2 words) */\r
1769 m68ki_push_32(0);\r
1770\r
1771 /* INSTRUCTION PIPE STAGE B */\r
1772 m68ki_push_16(0);\r
1773\r
1774 /* INSTRUCTION PIPE STAGE C */\r
1775 m68ki_push_16(0);\r
1776\r
1777 /* SPECIAL STATUS REGISTER */\r
1778 m68ki_push_16(0);\r
1779\r
1780 /* INTERNAL REGISTER */\r
1781 m68ki_push_16(0);\r
1782\r
1783 /* 1011, VECTOR OFFSET */\r
1784 m68ki_push_16(0xb000 | (vector<<2));\r
1785\r
1786 /* PROGRAM COUNTER */\r
1787 m68ki_push_32(pc);\r
1788\r
1789 /* STATUS REGISTER */\r
1790 m68ki_push_16(sr);\r
1791}\r
1792\r
1793\r
1794/* Used for Group 2 exceptions.\r
1795 * These stack a type 2 frame on the 020.\r
1796 */\r
1797INLINE void m68ki_exception_trap(uint vector)\r
1798{\r
1799 uint sr = m68ki_init_exception();\r
1800\r
1801 if(CPU_TYPE_IS_010_LESS(CPU_TYPE))\r
1802 m68ki_stack_frame_0000(REG_PC, sr, vector);\r
1803 else\r
1804 m68ki_stack_frame_0010(sr, vector);\r
1805\r
1806 m68ki_jump_vector(vector);\r
1807\r
1808 /* Use up some clock cycles */\r
1809 USE_CYCLES(CYC_EXCEPTION[vector]);\r
1810}\r
1811\r
1812/* Trap#n stacks a 0 frame but behaves like group2 otherwise */\r
1813INLINE void m68ki_exception_trapN(uint vector)\r
1814{\r
1815 uint sr = m68ki_init_exception();\r
1816 m68ki_stack_frame_0000(REG_PC, sr, vector);\r
1817 m68ki_jump_vector(vector);\r
1818\r
1819 /* Use up some clock cycles */\r
1820 USE_CYCLES(CYC_EXCEPTION[vector]);\r
1821}\r
1822\r
1823/* Exception for trace mode */\r
1824INLINE void m68ki_exception_trace(void)\r
1825{\r
1826 uint sr = m68ki_init_exception();\r
1827\r
1828 if(CPU_TYPE_IS_010_LESS(CPU_TYPE))\r
1829 {\r
1830 #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON\r
1831 if(CPU_TYPE_IS_000(CPU_TYPE))\r
1832 {\r
1833 CPU_INSTR_MODE = INSTRUCTION_NO;\r
1834 }\r
1835 #endif /* M68K_EMULATE_ADDRESS_ERROR */\r
1836 m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_TRACE);\r
1837 }\r
1838 else\r
1839 m68ki_stack_frame_0010(sr, EXCEPTION_TRACE);\r
1840\r
1841 m68ki_jump_vector(EXCEPTION_TRACE);\r
1842\r
1843 /* Trace nullifies a STOP instruction */\r
1844 CPU_STOPPED &= ~STOP_LEVEL_STOP;\r
1845\r
1846 /* Use up some clock cycles */\r
1847 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_TRACE]);\r
1848}\r
1849\r
1850/* Exception for privilege violation */\r
1851INLINE void m68ki_exception_privilege_violation(void)\r
1852{\r
1853 uint sr = m68ki_init_exception();\r
1854\r
1855 #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON\r
1856 if(CPU_TYPE_IS_000(CPU_TYPE))\r
1857 {\r
1858 CPU_INSTR_MODE = INSTRUCTION_NO;\r
1859 }\r
1860 #endif /* M68K_EMULATE_ADDRESS_ERROR */\r
1861\r
1862 m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_PRIVILEGE_VIOLATION);\r
1863 m68ki_jump_vector(EXCEPTION_PRIVILEGE_VIOLATION);\r
1864\r
1865 /* Use up some clock cycles and undo the instruction's cycles */\r
1866 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_PRIVILEGE_VIOLATION] - CYC_INSTRUCTION[REG_IR]);\r
1867}\r
1868\r
1869/* Exception for A-Line instructions */\r
1870INLINE void m68ki_exception_1010(void)\r
1871{\r
1872 uint sr;\r
1873#if M68K_LOG_1010_1111 == OPT_ON\r
1874 M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1010 instruction %04x (%s)\n",\r
1875 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,\r
1876 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));\r
1877#endif\r
1878\r
1879 sr = m68ki_init_exception();\r
1880 m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1010);\r
1881 m68ki_jump_vector(EXCEPTION_1010);\r
1882\r
1883 /* Use up some clock cycles and undo the instruction's cycles */\r
1884 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1010] - CYC_INSTRUCTION[REG_IR]);\r
1885}\r
1886\r
1887/* Exception for F-Line instructions */\r
1888INLINE void m68ki_exception_1111(void)\r
1889{\r
1890 uint sr;\r
1891\r
1892#if M68K_LOG_1010_1111 == OPT_ON\r
1893 M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: called 1111 instruction %04x (%s)\n",\r
1894 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,\r
1895 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));\r
1896#endif\r
1897\r
1898 sr = m68ki_init_exception();\r
1899 m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_1111);\r
1900 m68ki_jump_vector(EXCEPTION_1111);\r
1901\r
1902 /* Use up some clock cycles and undo the instruction's cycles */\r
1903 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_1111] - CYC_INSTRUCTION[REG_IR]);\r
1904}\r
1905\r
1906/* Exception for illegal instructions */\r
1907INLINE void m68ki_exception_illegal(void)\r
1908{\r
1909 uint sr;\r
1910\r
1911 M68K_DO_LOG((M68K_LOG_FILEHANDLE "%s at %08x: illegal instruction %04x (%s)\n",\r
1912 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PPC), REG_IR,\r
1913 m68ki_disassemble_quick(ADDRESS_68K(REG_PPC))));\r
1914\r
1915 sr = m68ki_init_exception();\r
1916\r
1917 #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON\r
1918 if(CPU_TYPE_IS_000(CPU_TYPE))\r
1919 {\r
1920 CPU_INSTR_MODE = INSTRUCTION_NO;\r
1921 }\r
1922 #endif /* M68K_EMULATE_ADDRESS_ERROR */\r
1923\r
1924 m68ki_stack_frame_0000(REG_PPC, sr, EXCEPTION_ILLEGAL_INSTRUCTION);\r
1925 m68ki_jump_vector(EXCEPTION_ILLEGAL_INSTRUCTION);\r
1926\r
1927 /* Use up some clock cycles and undo the instruction's cycles */\r
1928 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ILLEGAL_INSTRUCTION] - CYC_INSTRUCTION[REG_IR]);\r
1929}\r
1930\r
1931/* Exception for format errror in RTE */\r
1932INLINE void m68ki_exception_format_error(void)\r
1933{\r
1934 uint sr = m68ki_init_exception();\r
1935 m68ki_stack_frame_0000(REG_PC, sr, EXCEPTION_FORMAT_ERROR);\r
1936 m68ki_jump_vector(EXCEPTION_FORMAT_ERROR);\r
1937\r
1938 /* Use up some clock cycles and undo the instruction's cycles */\r
1939 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_FORMAT_ERROR] - CYC_INSTRUCTION[REG_IR]);\r
1940}\r
1941\r
1942/* Exception for address error */\r
1943INLINE void m68ki_exception_address_error(void)\r
1944{\r
1945 uint sr = m68ki_init_exception();\r
1946\r
1947 /* If we were processing a bus error, address error, or reset,\r
1948 * this is a catastrophic failure.\r
1949 * Halt the CPU\r
1950 */\r
1951 if(CPU_RUN_MODE == RUN_MODE_BERR_AERR_RESET)\r
1952 {\r
1953m68k_read_memory_8(0x00ffff01);\r
1954 CPU_STOPPED = STOP_LEVEL_HALT;\r
1955 return;\r
1956 }\r
1957 CPU_RUN_MODE = RUN_MODE_BERR_AERR_RESET;\r
1958\r
1959 /* Note: This is implemented for 68000 only! */\r
1960 m68ki_stack_frame_buserr(sr);\r
1961\r
1962 m68ki_jump_vector(EXCEPTION_ADDRESS_ERROR);\r
1963\r
1964 /* Use up some clock cycles and undo the instruction's cycles */\r
1965 USE_CYCLES(CYC_EXCEPTION[EXCEPTION_ADDRESS_ERROR] - CYC_INSTRUCTION[REG_IR]);\r
1966}\r
1967\r
1968\r
1969/* Service an interrupt request and start exception processing */\r
1970void m68ki_exception_interrupt(uint int_level)\r
1971{\r
1972 uint vector;\r
1973 uint sr;\r
1974 uint new_pc;\r
1975\r
1976 #if M68K_EMULATE_ADDRESS_ERROR == OPT_ON\r
1977 if(CPU_TYPE_IS_000(CPU_TYPE))\r
1978 {\r
1979 CPU_INSTR_MODE = INSTRUCTION_NO;\r
1980 }\r
1981 #endif /* M68K_EMULATE_ADDRESS_ERROR */\r
1982\r
1983 /* Turn off the stopped state */\r
1984 CPU_STOPPED &= ~STOP_LEVEL_STOP;\r
1985\r
1986 /* If we are halted, don't do anything */\r
1987 if(CPU_STOPPED)\r
1988 return;\r
1989\r
1990 /* Acknowledge the interrupt */\r
1991 vector = m68ki_int_ack(int_level);\r
1992\r
1993 /* Get the interrupt vector */\r
1994 if(vector == M68K_INT_ACK_AUTOVECTOR)\r
1995 /* Use the autovectors. This is the most commonly used implementation */\r
1996 vector = EXCEPTION_INTERRUPT_AUTOVECTOR+int_level;\r
1997 else if(vector == M68K_INT_ACK_SPURIOUS)\r
1998 /* Called if no devices respond to the interrupt acknowledge */\r
1999 vector = EXCEPTION_SPURIOUS_INTERRUPT;\r
2000 else if(vector > 255)\r
2001 {\r
2002 M68K_DO_LOG_EMU((M68K_LOG_FILEHANDLE "%s at %08x: Interrupt acknowledge returned invalid vector $%x\n",\r
2003 m68ki_cpu_names[CPU_TYPE], ADDRESS_68K(REG_PC), vector));\r
2004 return;\r
2005 }\r
2006\r
2007 /* Start exception processing */\r
2008 sr = m68ki_init_exception();\r
2009\r
2010 /* Set the interrupt mask to the level of the one being serviced */\r
2011 FLAG_INT_MASK = int_level<<8;\r
2012\r
2013 /* Get the new PC */\r
2014 new_pc = m68ki_read_data_32((vector<<2) + REG_VBR);\r
2015 //new_pc = m68k_read_immediate_32((vector<<2) + REG_VBR); // notaz hack\r
2016\r
2017 /* If vector is uninitialized, call the uninitialized interrupt vector */\r
2018 if(new_pc == 0)\r
2019 new_pc = m68ki_read_data_32((EXCEPTION_UNINITIALIZED_INTERRUPT<<2) + REG_VBR);\r
2020\r
2021 /* Generate a stack frame */\r
2022 m68ki_stack_frame_0000(REG_PC, sr, vector);\r
2023 if(FLAG_M && CPU_TYPE_IS_EC020_PLUS(CPU_TYPE))\r
2024 {\r
2025 /* Create throwaway frame */\r
2026 m68ki_set_sm_flag(FLAG_S); /* clear M */\r
2027 sr |= 0x2000; /* Same as SR in master stack frame except S is forced high */\r
2028 m68ki_stack_frame_0001(REG_PC, sr, vector);\r
2029 }\r
2030\r
2031 m68ki_jump(new_pc);\r
2032\r
2033 /* Defer cycle counting until later */\r
2034 CPU_INT_CYCLES += CYC_EXCEPTION[vector];\r
2035\r
2036#if !M68K_EMULATE_INT_ACK\r
2037 /* Automatically clear IRQ if we are not using an acknowledge scheme */\r
2038 CPU_INT_LEVEL = 0;\r
2039#endif /* M68K_EMULATE_INT_ACK */\r
2040}\r
2041\r
2042\r
2043/* ASG: Check for interrupts */\r
2044INLINE void m68ki_check_interrupts(void)\r
2045{\r
2046 if(CPU_INT_LEVEL > FLAG_INT_MASK)\r
2047 m68ki_exception_interrupt(CPU_INT_LEVEL>>8);\r
2048}\r
2049\r
2050\r
2051\r
2052/* ======================================================================== */\r
2053/* ============================== END OF FILE ============================= */\r
2054/* ======================================================================== */\r
2055\r
2056#endif /* M68KCPU__HEADER */\r
fast MegaDrive/MegaCD/32X emulator