3 * (c) Copyright Dave, 2004
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4 * (C) notaz, 2006-2009
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6 * This work is licensed under the terms of MAME license.
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7 * See COPYING file in the top-level directory.
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10 #include "pico_int.h"
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14 unsigned int SekCycleCnt;
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15 unsigned int SekCycleAim;
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21 struct Cyclone PicoCpuCM68k;
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25 m68ki_cpu_core PicoCpuMM68k;
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29 M68K_CONTEXT PicoCpuFM68k;
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35 // interrupt acknowledgment
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36 static int SekIntAck(int level)
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38 // try to emulate VDP's reaction to 68000 int ack
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39 if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }
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40 else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }
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41 PicoCpuCM68k.irq = 0;
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42 return CYCLONE_INT_ACK_AUTOVECTOR;
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45 static void SekResetAck(void)
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47 elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);
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50 static int SekUnrecognizedOpcode()
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54 elprintf(EL_ANOMALY, "Unrecognized Opcode @ %06x", pc);
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55 // see if we are still in a mapped region
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57 if (map_flag_set(m68k_read16_map[pc >> M68K_MEM_SHIFT])) {
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58 elprintf(EL_STATUS|EL_ANOMALY, "m68k crash @%06x", pc);
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59 PicoCpuCM68k.cycles = 0;
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60 PicoCpuCM68k.state_flags |= 1;
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63 #ifdef EMU_M68K // debugging cyclone
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65 extern int have_illegal;
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75 static int SekIntAckM68K(int level)
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77 if (level == 4) { Pico.video.pending_ints = 0; elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCycleCnt); }
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78 else if(level == 6) { Pico.video.pending_ints &= ~0x20; elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCycleCnt); }
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80 return M68K_INT_ACK_AUTOVECTOR;
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83 static int SekTasCallback(void)
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85 return 0; // no writeback
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91 static void SekIntAckF68K(unsigned level)
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94 Pico.video.pending_ints = 0;
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95 elprintf(EL_INTS, "hack: @ %06x [%i]", SekPc, SekCyclesDone());
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97 else if(level == 6) {
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98 Pico.video.pending_ints &= ~0x20;
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99 elprintf(EL_INTS, "vack: @ %06x [%i]", SekPc, SekCyclesDone());
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101 PicoCpuFM68k.interrupts[0] = 0;
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106 PICO_INTERNAL void SekInit(void)
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110 memset(&PicoCpuCM68k,0,sizeof(PicoCpuCM68k));
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111 PicoCpuCM68k.IrqCallback=SekIntAck;
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112 PicoCpuCM68k.ResetCallback=SekResetAck;
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113 PicoCpuCM68k.UnrecognizedCallback=SekUnrecognizedOpcode;
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114 PicoCpuCM68k.flags=4; // Z set
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118 void *oldcontext = m68ki_cpu_p;
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119 m68k_set_context(&PicoCpuMM68k);
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120 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
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122 m68k_set_int_ack_callback(SekIntAckM68K);
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123 m68k_set_tas_instr_callback(SekTasCallback);
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124 //m68k_pulse_reset();
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125 m68k_set_context(oldcontext);
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130 void *oldcontext = g_m68kcontext;
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131 g_m68kcontext = &PicoCpuFM68k;
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132 memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));
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134 PicoCpuFM68k.iack_handler = SekIntAckF68K;
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135 PicoCpuFM68k.sr = 0x2704; // Z flag
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136 g_m68kcontext = oldcontext;
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142 // Reset the 68000:
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143 PICO_INTERNAL int SekReset(void)
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145 if (Pico.rom==NULL) return 1;
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148 CycloneReset(&PicoCpuCM68k);
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151 m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set
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154 m68k_pulse_reset();
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159 g_m68kcontext = &PicoCpuFM68k;
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167 void SekStepM68k(void)
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169 SekCycleAim=SekCycleCnt+1;
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170 #if defined(EMU_CORE_DEBUG)
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171 SekCycleCnt+=CM_compareRun(1, 0);
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172 #elif defined(EMU_C68K)
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173 PicoCpuCM68k.cycles=1;
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174 CycloneRun(&PicoCpuCM68k);
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175 SekCycleCnt+=1-PicoCpuCM68k.cycles;
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176 #elif defined(EMU_M68K)
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177 SekCycleCnt+=m68k_execute(1);
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178 #elif defined(EMU_F68K)
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179 SekCycleCnt+=fm68k_emulate(1, 0);
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183 PICO_INTERNAL void SekSetRealTAS(int use_real)
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186 CycloneSetRealTAS(use_real);
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193 // Pack the cpu into a common format:
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195 PICO_INTERNAL void SekPackCpu(unsigned char *cpu, int is_sub)
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199 #if defined(EMU_C68K)
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200 struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;
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201 memcpy(cpu,context->d,0x40);
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202 pc=context->pc-context->membase;
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203 *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);
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204 *(unsigned int *)(cpu+0x48)=context->osp;
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205 cpu[0x4c] = context->irq;
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206 cpu[0x4d] = context->state_flags & 1;
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207 #elif defined(EMU_M68K)
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208 void *oldcontext = m68ki_cpu_p;
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209 m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);
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210 memcpy(cpu,m68ki_cpu_p->dar,0x40);
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211 pc=m68ki_cpu_p->pc;
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212 *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);
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213 *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET];
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214 cpu[0x4c] = CPU_INT_LEVEL>>8;
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215 cpu[0x4d] = CPU_STOPPED;
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216 m68k_set_context(oldcontext);
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217 #elif defined(EMU_F68K)
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218 M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
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219 memcpy(cpu,context->dreg,0x40);
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221 *(unsigned int *)(cpu+0x44)=context->sr;
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222 *(unsigned int *)(cpu+0x48)=context->asp;
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223 cpu[0x4c] = context->interrupts[0];
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224 cpu[0x4d] = (context->execinfo & FM68K_HALTED) ? 1 : 0;
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227 *(unsigned int *)(cpu+0x40) = pc;
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228 *(unsigned int *)(cpu+0x50) =
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229 is_sub ? SekCycleCntS68k : SekCycleCnt;
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232 PICO_INTERNAL void SekUnpackCpu(const unsigned char *cpu, int is_sub)
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234 #if defined(EMU_C68K)
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235 struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;
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236 CycloneSetSr(context, *(unsigned int *)(cpu+0x44));
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237 context->osp=*(unsigned int *)(cpu+0x48);
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238 memcpy(context->d,cpu,0x40);
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239 context->membase = 0;
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240 context->pc = *(unsigned int *)(cpu+0x40);
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241 CycloneUnpack(context, NULL); // rebase PC
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242 context->irq = cpu[0x4c];
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243 context->state_flags = 0;
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245 context->state_flags |= 1;
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246 #elif defined(EMU_M68K)
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247 void *oldcontext = m68ki_cpu_p;
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248 m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);
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249 m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));
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250 memcpy(m68ki_cpu_p->dar,cpu,0x40);
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251 m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);
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252 m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET]=*(unsigned int *)(cpu+0x48);
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253 CPU_INT_LEVEL = cpu[0x4c] << 8;
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254 CPU_STOPPED = cpu[0x4d];
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255 m68k_set_context(oldcontext);
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256 #elif defined(EMU_F68K)
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257 M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
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258 memcpy(context->dreg,cpu,0x40);
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259 context->pc =*(unsigned int *)(cpu+0x40);
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260 context->sr =*(unsigned int *)(cpu+0x44);
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261 context->asp=*(unsigned int *)(cpu+0x48);
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262 context->interrupts[0] = cpu[0x4c];
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263 context->execinfo &= ~FM68K_HALTED;
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264 if (cpu[0x4d]&1) context->execinfo |= FM68K_HALTED;
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267 SekCycleCntS68k = *(unsigned int *)(cpu+0x50);
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269 SekCycleCnt = *(unsigned int *)(cpu+0x50);
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273 /* idle loop detection, not to be used in CD mode */
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275 #include "cpu/cyclone/tools/idle.h"
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278 static unsigned short **idledet_ptrs = NULL;
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279 static int idledet_count = 0, idledet_bads = 0;
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280 static int idledet_start_frame = 0;
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283 #define IDLE_STATS 1
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284 unsigned int idlehit_addrs[128], idlehit_counts[128];
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286 void SekRegisterIdleHit(unsigned int pc)
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289 for (i = 0; i < 127 && idlehit_addrs[i]; i++) {
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290 if (idlehit_addrs[i] == pc) {
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291 idlehit_counts[i]++;
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295 idlehit_addrs[i] = pc;
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296 idlehit_counts[i] = 1;
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297 idlehit_addrs[i+1] = 0;
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301 void SekInitIdleDet(void)
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303 unsigned short **tmp = realloc(idledet_ptrs, 0x200*4);
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305 free(idledet_ptrs);
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306 idledet_ptrs = NULL;
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309 idledet_ptrs = tmp;
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310 idledet_count = idledet_bads = 0;
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311 idledet_start_frame = Pico.m.frame_count + 360;
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313 idlehit_addrs[0] = 0;
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320 fm68k_emulate(0, 1);
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324 int SekIsIdleReady(void)
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326 return (Pico.m.frame_count >= idledet_start_frame);
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329 int SekIsIdleCode(unsigned short *dst, int bytes)
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331 // printf("SekIsIdleCode %04x %i\n", *dst, bytes);
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335 if ((*dst & 0xf000) != 0x6000) // not another branch
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339 if ( (*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w); tas ($xxxx.w)
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340 (*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX
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341 (*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX
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343 if (PicoAHW & (PAHW_MCD|PAHW_32X))
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345 // with no addons, there should be no need to wait
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346 // for byte change anywhere
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347 if ( (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX)
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348 (*dst & 0xfff8) == 0x4a28) // tst.b ($xxxx,a0)
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352 if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and
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353 *dst == 0x4a39 || // tst.b ($xxxxxxxx)
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354 *dst == 0x4a79 || // tst.w ($xxxxxxxx)
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355 *dst == 0x4ab9 || // tst.l ($xxxxxxxx)
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356 (*dst & 0xc1ff) == 0x0039 || // move.x ($xxxxxxxx), dX
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357 (*dst & 0xf13f) == 0xb039))||// cmp.x ($xxxxxxxx), dX
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358 *dst == 0x0838 || // btst $X, ($xxxx.w) [6 byte op]
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359 (*dst & 0xffbf) == 0x0c38) // cmpi.{b,w} $X, ($xxxx.w)
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363 if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and
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364 *dst == 0x0839 || // btst $X, ($xxxxxxxx.w) [8 byte op]
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365 (*dst & 0xffbf) == 0x0c39))||// cmpi.{b,w} $X, ($xxxxxxxx)
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366 *dst == 0x0cb8) // cmpi.l $X, ($xxxx.w)
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370 if (PicoAHW & (PAHW_MCD|PAHW_32X))
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372 if ( (*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX
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373 (dst[1]&0xf100) == 0x0000 && // arithmetic
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374 (dst[3]&0xf100) == 0x0000) // arithmetic
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382 int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx)
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384 int is_main68k = 1;
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388 #if defined(EMU_C68K)
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389 struct Cyclone *cyc = ctx;
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390 is_main68k = cyc == &PicoCpuCM68k;
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391 pc -= cyc->membase;
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392 #elif defined(EMU_F68K)
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393 is_main68k = ctx == &PicoCpuFM68k;
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396 if (!(newop&0x200))
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397 elprintf(EL_IDLE, "idle: patch %06x %04x %04x %c %c #%i", pc, oldop, newop,
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398 (newop&0x200)?'n':'y', is_main68k?'m':'s', idledet_count);
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400 // XXX: probably shouldn't patch RAM too
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401 v = m68k_read16_map[pc >> M68K_MEM_SHIFT];
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402 if (!(v & 0x80000000))
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403 target = (u16 *)((v << 1) + pc);
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405 if (++idledet_bads > 128)
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406 return 2; // remove detector
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407 return 1; // don't patch
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410 if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {
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411 unsigned short **tmp = realloc(idledet_ptrs, (idledet_count+0x200)*4);
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414 idledet_ptrs = tmp;
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417 idledet_ptrs[idledet_count++] = target;
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422 void SekFinishIdleDet(void)
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425 CycloneFinishIdle();
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428 fm68k_emulate(0, 2);
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430 while (idledet_count > 0)
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432 unsigned short *op = idledet_ptrs[--idledet_count];
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433 if ((*op & 0xfd00) == 0x7100)
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434 *op &= 0xff, *op |= 0x6600;
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435 else if ((*op & 0xfd00) == 0x7500)
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436 *op &= 0xff, *op |= 0x6700;
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437 else if ((*op & 0xfd00) == 0x7d00)
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438 *op &= 0xff, *op |= 0x6000;
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440 elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);
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445 #if defined(CPU_CMP_R) || defined(CPU_CMP_W)
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455 struct ref_68k ref_68ks[2];
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456 static int current_68k;
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458 void SekTrace(int is_s68k)
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460 struct ref_68k *x68k = &ref_68ks[is_s68k];
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461 u32 pc = is_s68k ? SekPcS68k : SekPc;
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462 u32 sr = is_s68k ? SekSrS68k : SekSr;
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463 u32 cycles = is_s68k ? SekCycleCntS68k : SekCycleCnt;
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469 if (is_s68k != current_68k) {
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470 current_68k = is_s68k;
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471 cmd = CTL_68K_SLAVE | current_68k;
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472 tl_write(&cmd, sizeof(cmd));
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474 if (pc != x68k->pc) {
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476 tl_write_uint(CTL_68K_PC, x68k->pc);
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478 if (sr != x68k->sr) {
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480 tl_write_uint(CTL_68K_SR, x68k->sr);
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482 for (i = 0; i < 16; i++) {
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483 r = is_s68k ? SekDarS68k(i) : SekDar(i);
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484 if (r != x68k->dar[i]) {
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486 tl_write_uint(CTL_68K_R + i, r);
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489 tl_write_uint(CTL_68K_CYCLES, cycles);
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495 int ret = tl_read(&cmd, sizeof(cmd));
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497 elprintf(EL_STATUS, "EOF");
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501 case CTL_68K_SLAVE:
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502 case CTL_68K_SLAVE + 1:
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503 current_68k = cmd & 1;
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506 tl_read_uint(&x68k->pc);
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509 tl_read_uint(&x68k->sr);
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511 case CTL_68K_CYCLES:
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512 tl_read_uint(&x68k->cycles);
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515 if (CTL_68K_R <= cmd && cmd < CTL_68K_R + 0x10)
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516 tl_read_uint(&x68k->dar[cmd - CTL_68K_R]);
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518 elprintf(EL_STATUS, "invalid cmd: %02x", cmd);
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523 if (is_s68k != current_68k) {
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524 printf("bad 68k: %d %d\n", is_s68k, current_68k);
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527 if (cycles != x68k->cycles) {
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528 printf("bad cycles: %u %u\n", cycles, x68k->cycles);
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531 if ((pc ^ x68k->pc) & 0xffffff) {
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532 printf("bad PC: %08x %08x\n", pc, x68k->pc);
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535 if (sr != x68k->sr) {
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536 printf("bad SR: %03x %03x\n", sr, x68k->sr);
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539 for (i = 0; i < 16; i++) {
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540 r = is_s68k ? SekDarS68k(i) : SekDar(i);
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541 if (r != x68k->dar[i]) {
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542 printf("bad %c%d: %08x %08x\n", i < 8 ? 'D' : 'A', i & 7,
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548 for (i = 0; i < 8; i++)
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549 printf("D%d: %08x A%d: %08x\n", i, x68k->dar[i],
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550 i, x68k->dar[i + 8]);
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551 printf("PC: %08x, %08x\n", x68k->pc, x68k->pc_prev);
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556 x68k->pc_prev = x68k->pc;
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559 #endif // CPU_CMP_*
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561 #if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER
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562 static unsigned char op_flags[0x400000/2] = { 0, };
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563 static int atexit_set = 0;
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565 static void make_idc(void)
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567 FILE *f = fopen("idc.idc", "w");
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570 fprintf(f, "#include <idc.idc>\nstatic main() {\n");
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571 for (i = 0; i < 0x400000/2; i++)
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572 if (op_flags[i] != 0)
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573 fprintf(f, " MakeCode(0x%06x);\n", i*2);
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578 void instruction_hook(void)
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584 if (REG_PC < 0x400000)
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585 op_flags[REG_PC/2] = 1;
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589 // vim:shiftwidth=2:ts=2:expandtab
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