cc68a136 |
1 | // This is part of Pico Library\r |
2 | \r |
3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
4 | // (c) Copyright 2006 notaz, All rights reserved.\r |
5 | // Free for non-commercial use.\r |
6 | \r |
7 | // For commercial use, separate licencing terms must be obtained.\r |
8 | \r |
9 | \r |
efcba75f |
10 | #include "pico_int.h"\r |
cc68a136 |
11 | \r |
12 | \r |
13 | int SekCycleCnt=0; // cycles done in this frame\r |
14 | int SekCycleAim=0; // cycle aim\r |
15 | unsigned int SekCycleCntT=0;\r |
16 | \r |
70357ce5 |
17 | \r |
18 | /* context */\r |
19 | // Cyclone 68000\r |
cc68a136 |
20 | #ifdef EMU_C68K\r |
3aa1e148 |
21 | struct Cyclone PicoCpuCM68k;\r |
cc68a136 |
22 | #endif\r |
70357ce5 |
23 | // MUSASHI 68000\r |
cc68a136 |
24 | #ifdef EMU_M68K\r |
3aa1e148 |
25 | m68ki_cpu_core PicoCpuMM68k;\r |
cc68a136 |
26 | #endif\r |
70357ce5 |
27 | // FAME 68000\r |
28 | #ifdef EMU_F68K\r |
3aa1e148 |
29 | M68K_CONTEXT PicoCpuFM68k;\r |
cc68a136 |
30 | #endif\r |
31 | \r |
32 | \r |
70357ce5 |
33 | /* callbacks */\r |
cc68a136 |
34 | #ifdef EMU_C68K\r |
b837b69b |
35 | // interrupt acknowledgment\r |
0af33fe0 |
36 | static int SekIntAck(int level)\r |
cc68a136 |
37 | {\r |
38 | // try to emulate VDP's reaction to 68000 int ack\r |
69996cb7 |
39 | if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
40 | else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
3aa1e148 |
41 | PicoCpuCM68k.irq = 0;\r |
0af33fe0 |
42 | return CYCLONE_INT_ACK_AUTOVECTOR;\r |
cc68a136 |
43 | }\r |
44 | \r |
69996cb7 |
45 | static void SekResetAck(void)\r |
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46 | {\r |
69996cb7 |
47 | elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);\r |
cc68a136 |
48 | }\r |
49 | \r |
50 | static int SekUnrecognizedOpcode()\r |
51 | {\r |
52 | unsigned int pc, op;\r |
53 | pc = SekPc;\r |
3aa1e148 |
54 | op = PicoCpuCM68k.read16(pc);\r |
69996cb7 |
55 | elprintf(EL_ANOMALY, "Unrecognized Opcode %04x @ %06x", op, pc);\r |
cc68a136 |
56 | // see if we are not executing trash\r |
57 | if (pc < 0x200 || (pc > Pico.romsize+4 && (pc&0xe00000)!=0xe00000)) {\r |
3aa1e148 |
58 | PicoCpuCM68k.cycles = 0;\r |
59 | PicoCpuCM68k.state_flags |= 1;\r |
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60 | return 1;\r |
61 | }\r |
2d0b15bb |
62 | #ifdef EMU_M68K // debugging cyclone\r |
63 | {\r |
64 | extern int have_illegal;\r |
65 | have_illegal = 1;\r |
66 | }\r |
67 | #endif\r |
cc68a136 |
68 | return 0;\r |
69 | }\r |
70 | #endif\r |
71 | \r |
72 | \r |
73 | #ifdef EMU_M68K\r |
74 | static int SekIntAckM68K(int level)\r |
75 | {\r |
69996cb7 |
76 | if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
77 | else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
cc68a136 |
78 | CPU_INT_LEVEL = 0;\r |
79 | return M68K_INT_ACK_AUTOVECTOR;\r |
80 | }\r |
0af33fe0 |
81 | \r |
82 | static int SekTasCallback(void)\r |
83 | {\r |
84 | return 0; // no writeback\r |
85 | }\r |
cc68a136 |
86 | #endif\r |
87 | \r |
88 | \r |
70357ce5 |
89 | #ifdef EMU_F68K\r |
3aa1e148 |
90 | static void SekIntAckF68K(unsigned level)\r |
70357ce5 |
91 | {\r |
92 | if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
93 | else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }\r |
3aa1e148 |
94 | PicoCpuFM68k.interrupts[0] = 0;\r |
70357ce5 |
95 | }\r |
96 | #endif\r |
97 | \r |
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98 | \r |
2aa27095 |
99 | PICO_INTERNAL void SekInit(void)\r |
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100 | {\r |
101 | #ifdef EMU_C68K\r |
102 | CycloneInit();\r |
3aa1e148 |
103 | memset(&PicoCpuCM68k,0,sizeof(PicoCpuCM68k));\r |
104 | PicoCpuCM68k.IrqCallback=SekIntAck;\r |
105 | PicoCpuCM68k.ResetCallback=SekResetAck;\r |
106 | PicoCpuCM68k.UnrecognizedCallback=SekUnrecognizedOpcode;\r |
03e4f2a3 |
107 | PicoCpuCM68k.flags=4; // Z set\r |
cc68a136 |
108 | #endif\r |
cc68a136 |
109 | #ifdef EMU_M68K\r |
110 | {\r |
111 | void *oldcontext = m68ki_cpu_p;\r |
3aa1e148 |
112 | m68k_set_context(&PicoCpuMM68k);\r |
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113 | m68k_set_cpu_type(M68K_CPU_TYPE_68000);\r |
114 | m68k_init();\r |
115 | m68k_set_int_ack_callback(SekIntAckM68K);\r |
0af33fe0 |
116 | m68k_set_tas_instr_callback(SekTasCallback);\r |
9037e45d |
117 | //m68k_pulse_reset();\r |
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118 | m68k_set_context(oldcontext);\r |
119 | }\r |
120 | #endif\r |
70357ce5 |
121 | #ifdef EMU_F68K\r |
122 | {\r |
123 | void *oldcontext = g_m68kcontext;\r |
3aa1e148 |
124 | g_m68kcontext = &PicoCpuFM68k;\r |
125 | memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));\r |
03e4f2a3 |
126 | fm68k_init();\r |
3aa1e148 |
127 | PicoCpuFM68k.iack_handler = SekIntAckF68K;\r |
b5e5172d |
128 | PicoCpuFM68k.sr = 0x2704; // Z flag\r |
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129 | g_m68kcontext = oldcontext;\r |
130 | }\r |
131 | #endif\r |
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132 | }\r |
133 | \r |
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134 | \r |
cc68a136 |
135 | // Reset the 68000:\r |
2aa27095 |
136 | PICO_INTERNAL int SekReset(void)\r |
cc68a136 |
137 | {\r |
138 | if (Pico.rom==NULL) return 1;\r |
139 | \r |
140 | #ifdef EMU_C68K\r |
3aa1e148 |
141 | PicoCpuCM68k.state_flags=0;\r |
142 | PicoCpuCM68k.osp=0;\r |
143 | PicoCpuCM68k.srh =0x27; // Supervisor mode\r |
3aa1e148 |
144 | PicoCpuCM68k.irq=0;\r |
145 | PicoCpuCM68k.a[7]=PicoCpuCM68k.read32(0); // Stack Pointer\r |
146 | PicoCpuCM68k.membase=0;\r |
147 | PicoCpuCM68k.pc=PicoCpuCM68k.checkpc(PicoCpuCM68k.read32(4)); // Program Counter\r |
cc68a136 |
148 | #endif\r |
cc68a136 |
149 | #ifdef EMU_M68K\r |
3aa1e148 |
150 | m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set\r |
2d0b15bb |
151 | m68ki_cpu.sp[0]=0;\r |
152 | m68k_set_irq(0);\r |
b837b69b |
153 | m68k_pulse_reset();\r |
99464b62 |
154 | REG_USP = 0; // ?\r |
cc68a136 |
155 | #endif\r |
70357ce5 |
156 | #ifdef EMU_F68K\r |
157 | {\r |
3aa1e148 |
158 | g_m68kcontext = &PicoCpuFM68k;\r |
03e4f2a3 |
159 | fm68k_reset();\r |
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160 | }\r |
161 | #endif\r |
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162 | \r |
163 | return 0;\r |
164 | }\r |
165 | \r |
5f9a0d16 |
166 | void SekStepM68k(void)\r |
167 | {\r |
168 | SekCycleAim=SekCycleCnt+1;\r |
169 | #if defined(EMU_CORE_DEBUG)\r |
170 | SekCycleCnt+=CM_compareRun(1, 0);\r |
171 | #elif defined(EMU_C68K)\r |
172 | PicoCpuCM68k.cycles=1;\r |
173 | CycloneRun(&PicoCpuCM68k);\r |
174 | SekCycleCnt+=1-PicoCpuCM68k.cycles;\r |
175 | #elif defined(EMU_M68K)\r |
176 | SekCycleCnt+=m68k_execute(1);\r |
177 | #elif defined(EMU_F68K)\r |
f579f7b8 |
178 | SekCycleCnt+=fm68k_emulate(1, 0, 0);\r |
5f9a0d16 |
179 | #endif\r |
180 | }\r |
cc68a136 |
181 | \r |
eff55556 |
182 | PICO_INTERNAL void SekSetRealTAS(int use_real)\r |
2433f409 |
183 | {\r |
184 | #ifdef EMU_C68K\r |
185 | CycloneSetRealTAS(use_real);\r |
186 | #endif\r |
70357ce5 |
187 | #ifdef EMU_F68K\r |
188 | // TODO\r |
189 | #endif\r |
2433f409 |
190 | }\r |
191 | \r |
5f9a0d16 |
192 | \r |
053fd9b4 |
193 | /* idle loop detection, not to be used in CD mode */\r |
194 | #ifdef EMU_C68K\r |
195 | #include "cpu/Cyclone/tools/idle.h"\r |
196 | #endif\r |
197 | \r |
198 | static int *idledet_addrs = NULL;\r |
199 | static int idledet_count = 0, idledet_bads = 0;\r |
200 | int idledet_start_frame = 0;\r |
053fd9b4 |
201 | \r |
5ed2a20e |
202 | #if 0\r |
203 | #define IDLE_STATS 1\r |
204 | unsigned int idlehit_addrs[128], idlehit_counts[128];\r |
205 | \r |
206 | void SekRegisterIdleHit(unsigned int pc)\r |
207 | {\r |
208 | int i;\r |
209 | for (i = 0; i < 127 && idlehit_addrs[i]; i++) {\r |
210 | if (idlehit_addrs[i] == pc) {\r |
211 | idlehit_counts[i]++;\r |
212 | return;\r |
213 | }\r |
214 | }\r |
215 | idlehit_addrs[i] = pc;\r |
216 | idlehit_counts[i] = 1;\r |
217 | idlehit_addrs[i+1] = 0;\r |
218 | }\r |
219 | #endif\r |
220 | \r |
053fd9b4 |
221 | void SekInitIdleDet(void)\r |
222 | {\r |
223 | void *tmp = realloc(idledet_addrs, 0x200*4);\r |
224 | if (tmp == NULL) {\r |
225 | free(idledet_addrs);\r |
226 | idledet_addrs = NULL;\r |
227 | }\r |
228 | else\r |
229 | idledet_addrs = tmp;\r |
230 | idledet_count = idledet_bads = 0;\r |
231 | idledet_start_frame = Pico.m.frame_count + 360;\r |
5ed2a20e |
232 | #ifdef IDLE_STATS\r |
233 | idlehit_addrs[0] = 0;\r |
234 | #endif\r |
053fd9b4 |
235 | \r |
053fd9b4 |
236 | #ifdef EMU_C68K\r |
237 | CycloneInitIdle();\r |
238 | #endif\r |
c060a9ab |
239 | #ifdef EMU_F68K\r |
c060a9ab |
240 | fm68k_emulate(0, 0, 1);\r |
241 | #endif\r |
053fd9b4 |
242 | }\r |
243 | \r |
244 | int SekIsIdleCode(unsigned short *dst, int bytes)\r |
245 | {\r |
8187ba84 |
246 | // printf("SekIsIdleCode %04x %i\n", *dst, bytes);\r |
053fd9b4 |
247 | switch (bytes)\r |
248 | {\r |
5ed2a20e |
249 | case 2:\r |
250 | if ((*dst & 0xf000) != 0x6000) // not another branch\r |
251 | return 1;\r |
252 | break;\r |
053fd9b4 |
253 | case 4:\r |
b0677887 |
254 | if ( (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX) // there should be no need to wait\r |
255 | (*dst & 0xfff8) == 0x4a28 || // tst.b ($xxxx,a0) // for byte change anywhere\r |
256 | (*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w); tas ($xxxx.w)\r |
053fd9b4 |
257 | (*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX\r |
258 | (*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX\r |
259 | return 1;\r |
260 | break;\r |
261 | case 6:\r |
b0677887 |
262 | if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and\r |
263 | *dst == 0x4a39 || // tst.b ($xxxxxxxx)\r |
264 | *dst == 0x4a79 || // tst.w ($xxxxxxxx)\r |
265 | *dst == 0x4ab9 || // tst.l ($xxxxxxxx)\r |
266 | (*dst & 0xc1ff) == 0x0039 || // move.x ($xxxxxxxx), dX\r |
267 | (*dst & 0xf13f) == 0xb039))||// cmp.x ($xxxxxxxx), dX\r |
268 | *dst == 0x0838 || // btst $X, ($xxxx.w) [6 byte op]\r |
269 | (*dst & 0xffbf) == 0x0c38) // cmpi.{b,w} $X, ($xxxx.w)\r |
053fd9b4 |
270 | return 1;\r |
271 | break;\r |
272 | case 8:\r |
b0677887 |
273 | if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and\r |
274 | *dst == 0x0839 || // btst $X, ($xxxxxxxx.w) [8 byte op]\r |
275 | (*dst & 0xffbf) == 0x0c39))||// cmpi.{b,w} $X, ($xxxxxxxx)\r |
276 | *dst == 0x0cb8) // cmpi.l $X, ($xxxx.w)\r |
053fd9b4 |
277 | return 1;\r |
278 | break;\r |
279 | case 12:\r |
280 | if ((*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX\r |
b0677887 |
281 | (dst[1]&0xf100) == 0x0000 && // arithmetic\r |
282 | (dst[3]&0xf100) == 0x0000) // arithmetic\r |
053fd9b4 |
283 | return 1;\r |
284 | break;\r |
285 | }\r |
286 | \r |
287 | return 0;\r |
288 | }\r |
289 | \r |
5ed2a20e |
290 | int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx)\r |
053fd9b4 |
291 | {\r |
5ed2a20e |
292 | int is_main68k = 1;\r |
293 | #if defined(EMU_C68K)\r |
294 | struct Cyclone *cyc = ctx;\r |
295 | is_main68k = cyc == &PicoCpuCM68k;\r |
296 | pc -= cyc->membase;\r |
297 | #elif defined(EMU_F68K)\r |
298 | is_main68k = ctx == &PicoCpuFM68k;\r |
053fd9b4 |
299 | #endif\r |
300 | pc &= ~0xff000000;\r |
5ed2a20e |
301 | elprintf(EL_IDLE, "idle: patch %06x %04x %04x %c %c #%i", pc, oldop, newop,\r |
302 | (newop&0x200)?'n':'y', is_main68k?'m':'s', idledet_count);\r |
303 | \r |
b0677887 |
304 | if (pc > Pico.romsize && !(PicoAHW & PAHW_SVP)) {\r |
053fd9b4 |
305 | if (++idledet_bads > 128) return 2; // remove detector\r |
306 | return 1; // don't patch\r |
307 | }\r |
308 | \r |
309 | if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {\r |
310 | void *tmp = realloc(idledet_addrs, (idledet_count+0x200)*4);\r |
311 | if (tmp == NULL) return 1;\r |
312 | idledet_addrs = tmp;\r |
313 | }\r |
314 | \r |
b0677887 |
315 | if (pc < Pico.romsize)\r |
316 | idledet_addrs[idledet_count++] = pc;\r |
317 | \r |
053fd9b4 |
318 | return 0;\r |
319 | }\r |
320 | \r |
321 | void SekFinishIdleDet(void)\r |
322 | {\r |
053fd9b4 |
323 | #ifdef EMU_C68K\r |
324 | CycloneFinishIdle();\r |
c060a9ab |
325 | #endif\r |
326 | #ifdef EMU_F68K\r |
327 | fm68k_emulate(0, 0, 2);\r |
053fd9b4 |
328 | #endif\r |
329 | while (idledet_count > 0)\r |
330 | {\r |
331 | unsigned short *op = (unsigned short *)&Pico.rom[idledet_addrs[--idledet_count]];\r |
332 | if ((*op & 0xfd00) == 0x7100)\r |
333 | *op &= 0xff, *op |= 0x6600;\r |
334 | else if ((*op & 0xfd00) == 0x7500)\r |
335 | *op &= 0xff, *op |= 0x6700;\r |
336 | else if ((*op & 0xfd00) == 0x7d00)\r |
337 | *op &= 0xff, *op |= 0x6000;\r |
338 | else\r |
339 | elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);\r |
340 | }\r |
053fd9b4 |
341 | }\r |
342 | \r |
343 | \r |
6cab49fd |
344 | #if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER\r |
345 | static unsigned char op_flags[0x400000/2] = { 0, };\r |
346 | static int atexit_set = 0;\r |
347 | \r |
348 | static void make_idc(void)\r |
349 | {\r |
350 | FILE *f = fopen("idc.idc", "w");\r |
351 | int i;\r |
352 | if (!f) return;\r |
353 | fprintf(f, "#include <idc.idc>\nstatic main() {\n");\r |
354 | for (i = 0; i < 0x400000/2; i++)\r |
355 | if (op_flags[i] != 0)\r |
356 | fprintf(f, " MakeCode(0x%06x);\n", i*2);\r |
357 | fprintf(f, "}\n");\r |
358 | fclose(f);\r |
359 | }\r |
360 | \r |
361 | void instruction_hook(void)\r |
362 | {\r |
363 | if (!atexit_set) {\r |
364 | atexit(make_idc);\r |
365 | atexit_set = 1;\r |
366 | }\r |
367 | if (REG_PC < 0x400000)\r |
368 | op_flags[REG_PC/2] = 1;\r |
369 | }\r |
370 | #endif\r |