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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 |
10 | #include "PicoInt.h"\r |
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 |
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17 | \r |
18 | /* context */\r |
19 | // Cyclone 68000\r |
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20 | #ifdef EMU_C68K\r |
3aa1e148 |
21 | struct Cyclone PicoCpuCM68k;\r |
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22 | #endif\r |
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23 | // MUSASHI 68000\r |
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24 | #ifdef EMU_M68K\r |
3aa1e148 |
25 | m68ki_cpu_core PicoCpuMM68k;\r |
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26 | #endif\r |
70357ce5 |
27 | // FAME 68000\r |
28 | #ifdef EMU_F68K\r |
3aa1e148 |
29 | M68K_CONTEXT PicoCpuFM68k;\r |
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30 | #endif\r |
31 | \r |
32 | \r |
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33 | /* callbacks */\r |
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34 | #ifdef EMU_C68K\r |
b837b69b |
35 | // interrupt acknowledgment\r |
0af33fe0 |
36 | static int SekIntAck(int level)\r |
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37 | {\r |
38 | // try to emulate VDP's reaction to 68000 int ack\r |
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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 |
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43 | }\r |
44 | \r |
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45 | static void SekResetAck(void)\r |
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46 | {\r |
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47 | elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);\r |
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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 |
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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 |
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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 |
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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 |
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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 |
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86 | #endif\r |
87 | \r |
88 | \r |
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89 | #ifdef EMU_F68K\r |
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90 | static void SekIntAckF68K(unsigned level)\r |
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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 |
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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 |
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108 | #endif\r |
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109 | #ifdef EMU_M68K\r |
110 | {\r |
111 | void *oldcontext = m68ki_cpu_p;\r |
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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 |
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116 | m68k_set_tas_instr_callback(SekTasCallback);\r |
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117 | //m68k_pulse_reset();\r |
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118 | m68k_set_context(oldcontext);\r |
119 | }\r |
120 | #endif\r |
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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 |
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127 | PicoCpuFM68k.iack_handler = SekIntAckF68K;\r |
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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 |
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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 |
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148 | #endif\r |
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149 | #ifdef EMU_M68K\r |
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150 | m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set\r |
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151 | m68ki_cpu.sp[0]=0;\r |
152 | m68k_set_irq(0);\r |
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153 | m68k_pulse_reset();\r |
99464b62 |
154 | REG_USP = 0; // ?\r |
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155 | #endif\r |
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156 | #ifdef EMU_F68K\r |
157 | {\r |
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158 | g_m68kcontext = &PicoCpuFM68k;\r |
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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 |
166 | \r |
eff55556 |
167 | PICO_INTERNAL void SekSetRealTAS(int use_real)\r |
2433f409 |
168 | {\r |
169 | #ifdef EMU_C68K\r |
170 | CycloneSetRealTAS(use_real);\r |
171 | #endif\r |
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172 | #ifdef EMU_F68K\r |
173 | // TODO\r |
174 | #endif\r |
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175 | }\r |
176 | \r |
053fd9b4 |
177 | /* idle loop detection, not to be used in CD mode */\r |
178 | #ifdef EMU_C68K\r |
179 | #include "cpu/Cyclone/tools/idle.h"\r |
180 | #endif\r |
181 | \r |
182 | static int *idledet_addrs = NULL;\r |
183 | static int idledet_count = 0, idledet_bads = 0;\r |
184 | int idledet_start_frame = 0;\r |
053fd9b4 |
185 | \r |
186 | void SekInitIdleDet(void)\r |
187 | {\r |
188 | void *tmp = realloc(idledet_addrs, 0x200*4);\r |
189 | if (tmp == NULL) {\r |
190 | free(idledet_addrs);\r |
191 | idledet_addrs = NULL;\r |
192 | }\r |
193 | else\r |
194 | idledet_addrs = tmp;\r |
195 | idledet_count = idledet_bads = 0;\r |
196 | idledet_start_frame = Pico.m.frame_count + 360;\r |
197 | \r |
053fd9b4 |
198 | #ifdef EMU_C68K\r |
199 | CycloneInitIdle();\r |
200 | #endif\r |
c060a9ab |
201 | #ifdef EMU_F68K\r |
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202 | fm68k_emulate(0, 0, 1);\r |
203 | #endif\r |
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204 | }\r |
205 | \r |
206 | int SekIsIdleCode(unsigned short *dst, int bytes)\r |
207 | {\r |
8187ba84 |
208 | // printf("SekIsIdleCode %04x %i\n", *dst, bytes);\r |
053fd9b4 |
209 | switch (bytes)\r |
210 | {\r |
211 | case 4:\r |
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212 | if ( (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX) // there should be no need to wait\r |
213 | (*dst & 0xfff8) == 0x4a28 || // tst.b ($xxxx,a0) // for byte change anywhere\r |
214 | (*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w); tas ($xxxx.w)\r |
053fd9b4 |
215 | (*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX\r |
216 | (*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX\r |
217 | return 1;\r |
218 | break;\r |
219 | case 6:\r |
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220 | if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and\r |
221 | *dst == 0x4a39 || // tst.b ($xxxxxxxx)\r |
222 | *dst == 0x4a79 || // tst.w ($xxxxxxxx)\r |
223 | *dst == 0x4ab9 || // tst.l ($xxxxxxxx)\r |
224 | (*dst & 0xc1ff) == 0x0039 || // move.x ($xxxxxxxx), dX\r |
225 | (*dst & 0xf13f) == 0xb039))||// cmp.x ($xxxxxxxx), dX\r |
226 | *dst == 0x0838 || // btst $X, ($xxxx.w) [6 byte op]\r |
227 | (*dst & 0xffbf) == 0x0c38) // cmpi.{b,w} $X, ($xxxx.w)\r |
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228 | return 1;\r |
229 | break;\r |
230 | case 8:\r |
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231 | if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and\r |
232 | *dst == 0x0839 || // btst $X, ($xxxxxxxx.w) [8 byte op]\r |
233 | (*dst & 0xffbf) == 0x0c39))||// cmpi.{b,w} $X, ($xxxxxxxx)\r |
234 | *dst == 0x0cb8) // cmpi.l $X, ($xxxx.w)\r |
053fd9b4 |
235 | return 1;\r |
236 | break;\r |
237 | case 12:\r |
238 | if ((*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX\r |
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239 | (dst[1]&0xf100) == 0x0000 && // arithmetic\r |
240 | (dst[3]&0xf100) == 0x0000) // arithmetic\r |
053fd9b4 |
241 | return 1;\r |
242 | break;\r |
243 | }\r |
244 | \r |
245 | return 0;\r |
246 | }\r |
247 | \r |
248 | int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop)\r |
249 | {\r |
250 | #ifdef EMU_C68K\r |
251 | pc -= PicoCpuCM68k.membase;\r |
252 | #endif\r |
253 | pc &= ~0xff000000;\r |
254 | elprintf(EL_IDLE, "idle: patch %06x %04x %04x #%i", pc, oldop, newop, idledet_count);\r |
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255 | if (pc > Pico.romsize && !(PicoAHW & PAHW_SVP)) {\r |
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256 | if (++idledet_bads > 128) return 2; // remove detector\r |
257 | return 1; // don't patch\r |
258 | }\r |
259 | \r |
260 | if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {\r |
261 | void *tmp = realloc(idledet_addrs, (idledet_count+0x200)*4);\r |
262 | if (tmp == NULL) return 1;\r |
263 | idledet_addrs = tmp;\r |
264 | }\r |
265 | \r |
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266 | if (pc < Pico.romsize)\r |
267 | idledet_addrs[idledet_count++] = pc;\r |
268 | \r |
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269 | return 0;\r |
270 | }\r |
271 | \r |
272 | void SekFinishIdleDet(void)\r |
273 | {\r |
053fd9b4 |
274 | #ifdef EMU_C68K\r |
275 | CycloneFinishIdle();\r |
c060a9ab |
276 | #endif\r |
277 | #ifdef EMU_F68K\r |
278 | fm68k_emulate(0, 0, 2);\r |
053fd9b4 |
279 | #endif\r |
280 | while (idledet_count > 0)\r |
281 | {\r |
282 | unsigned short *op = (unsigned short *)&Pico.rom[idledet_addrs[--idledet_count]];\r |
283 | if ((*op & 0xfd00) == 0x7100)\r |
284 | *op &= 0xff, *op |= 0x6600;\r |
285 | else if ((*op & 0xfd00) == 0x7500)\r |
286 | *op &= 0xff, *op |= 0x6700;\r |
287 | else if ((*op & 0xfd00) == 0x7d00)\r |
288 | *op &= 0xff, *op |= 0x6000;\r |
289 | else\r |
290 | elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);\r |
291 | }\r |
053fd9b4 |
292 | }\r |
293 | \r |
294 | \r |
6cab49fd |
295 | #if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER\r |
296 | static unsigned char op_flags[0x400000/2] = { 0, };\r |
297 | static int atexit_set = 0;\r |
298 | \r |
299 | static void make_idc(void)\r |
300 | {\r |
301 | FILE *f = fopen("idc.idc", "w");\r |
302 | int i;\r |
303 | if (!f) return;\r |
304 | fprintf(f, "#include <idc.idc>\nstatic main() {\n");\r |
305 | for (i = 0; i < 0x400000/2; i++)\r |
306 | if (op_flags[i] != 0)\r |
307 | fprintf(f, " MakeCode(0x%06x);\n", i*2);\r |
308 | fprintf(f, "}\n");\r |
309 | fclose(f);\r |
310 | }\r |
311 | \r |
312 | void instruction_hook(void)\r |
313 | {\r |
314 | if (!atexit_set) {\r |
315 | atexit(make_idc);\r |
316 | atexit_set = 1;\r |
317 | }\r |
318 | if (REG_PC < 0x400000)\r |
319 | op_flags[REG_PC/2] = 1;\r |
320 | }\r |
321 | #endif\r |