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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16 struct Cyclone PicoCpuCM68k;
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20 m68ki_cpu_core PicoCpuMM68k;
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24 M68K_CONTEXT PicoCpuFM68k;
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28 static int do_ack(int level)
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30 struct PicoVideo *pv = &Pico.video;
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32 elprintf(EL_INTS, "%cack: @ %06x [%u], p=%02x",
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33 level == 6 ? 'v' : 'h', SekPc, SekCyclesDone(), pv->pending_ints);
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34 // the VDP doesn't look at the 68k level
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35 if (pv->pending_ints & pv->reg[1] & 0x20) {
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36 pv->pending_ints &= ~0x20;
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37 pv->status &= ~SR_F;
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38 return (pv->reg[0] & pv->pending_ints & 0x10) >> 2;
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40 else if (pv->pending_ints & pv->reg[0] & 0x10)
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41 pv->pending_ints &= ~0x10;
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48 // interrupt acknowledgment
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49 static int SekIntAck(int level)
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51 PicoCpuCM68k.irq = do_ack(level);
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52 return CYCLONE_INT_ACK_AUTOVECTOR;
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55 static void SekResetAck(void)
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57 elprintf(EL_ANOMALY, "Reset encountered @ %06x", SekPc);
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60 static int SekUnrecognizedOpcode()
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64 elprintf(EL_ANOMALY, "Unrecognized Opcode @ %06x", pc);
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65 // see if we are still in a mapped region
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67 if (map_flag_set(m68k_read16_map[pc >> M68K_MEM_SHIFT])) {
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68 elprintf(EL_STATUS|EL_ANOMALY, "m68k crash @%06x", pc);
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69 PicoCpuCM68k.cycles = 0;
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70 PicoCpuCM68k.state_flags |= 1;
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73 // happened once - may happen again
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75 #ifdef EMU_M68K // debugging cyclone
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77 extern int have_illegal;
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87 static int SekIntAckM68K(int level)
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89 CPU_INT_LEVEL = do_ack(level) << 8;
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90 return M68K_INT_ACK_AUTOVECTOR;
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93 static int SekTasCallback(void)
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95 return 0; // no writeback
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101 static void SekIntAckF68K(unsigned level)
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103 PicoCpuFM68k.interrupts[0] = do_ack(level);
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108 PICO_INTERNAL void SekInit(void)
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112 memset(&PicoCpuCM68k,0,sizeof(PicoCpuCM68k));
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113 PicoCpuCM68k.IrqCallback=SekIntAck;
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114 PicoCpuCM68k.ResetCallback=SekResetAck;
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115 PicoCpuCM68k.UnrecognizedCallback=SekUnrecognizedOpcode;
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116 PicoCpuCM68k.flags=4; // Z set
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120 void *oldcontext = m68ki_cpu_p;
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121 m68k_set_context(&PicoCpuMM68k);
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122 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
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124 m68k_set_int_ack_callback(SekIntAckM68K);
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125 m68k_set_tas_instr_callback(SekTasCallback);
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126 //m68k_pulse_reset();
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127 m68k_set_context(oldcontext);
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131 memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));
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133 PicoCpuFM68k.iack_handler = SekIntAckF68K;
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134 PicoCpuFM68k.sr = 0x2704; // Z flag
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139 // Reset the 68000:
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140 PICO_INTERNAL int SekReset(void)
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142 if (Pico.rom==NULL) return 1;
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145 CycloneReset(&PicoCpuCM68k);
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148 m68k_set_context(&PicoCpuMM68k); // if we ever reset m68k, we always need it's context to be set
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151 m68k_pulse_reset();
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155 fm68k_reset(&PicoCpuFM68k);
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161 void SekStepM68k(void)
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163 Pico.t.m68c_aim = Pico.t.m68c_cnt + 1;
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164 #if defined(EMU_CORE_DEBUG)
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165 Pico.t.m68c_cnt += CM_compareRun(1, 0);
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166 #elif defined(EMU_C68K)
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167 PicoCpuCM68k.cycles=1;
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168 CycloneRun(&PicoCpuCM68k);
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169 Pico.t.m68c_cnt += 1 - PicoCpuCM68k.cycles;
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170 #elif defined(EMU_M68K)
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171 Pico.t.m68c_cnt += m68k_execute(1);
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172 #elif defined(EMU_F68K)
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173 Pico.t.m68c_cnt += fm68k_emulate(&PicoCpuFM68k, 1, 0);
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177 PICO_INTERNAL void SekSetRealTAS(int use_real)
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180 CycloneSetRealTAS(use_real);
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187 // Pack the cpu into a common format:
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189 PICO_INTERNAL void SekPackCpu(unsigned char *cpu, int is_sub)
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193 #if defined(EMU_C68K)
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194 struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;
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195 memcpy(cpu,context->d,0x40);
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196 pc=context->pc-context->membase;
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197 *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);
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198 *(unsigned int *)(cpu+0x48)=context->osp;
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199 cpu[0x4c] = context->irq;
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200 cpu[0x4d] = context->state_flags & 1;
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201 #elif defined(EMU_M68K)
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202 void *oldcontext = m68ki_cpu_p;
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203 m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);
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204 memcpy(cpu,m68ki_cpu_p->dar,0x40);
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205 pc=m68ki_cpu_p->pc;
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206 *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);
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207 *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET];
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208 cpu[0x4c] = CPU_INT_LEVEL>>8;
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209 cpu[0x4d] = CPU_STOPPED;
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210 m68k_set_context(oldcontext);
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211 #elif defined(EMU_F68K)
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212 M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
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213 memcpy(cpu,context->dreg,0x40);
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215 *(unsigned int *)(cpu+0x44)=context->sr;
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216 *(unsigned int *)(cpu+0x48)=context->asp;
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217 cpu[0x4c] = context->interrupts[0];
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218 cpu[0x4d] = (context->execinfo & FM68K_HALTED) ? 1 : 0;
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221 *(unsigned int *)(cpu+0x40) = pc;
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222 *(unsigned int *)(cpu+0x50) =
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223 is_sub ? SekCycleCntS68k : Pico.t.m68c_cnt;
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226 PICO_INTERNAL void SekUnpackCpu(const unsigned char *cpu, int is_sub)
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228 #if defined(EMU_C68K)
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229 struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;
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230 CycloneSetSr(context, *(unsigned int *)(cpu+0x44));
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231 context->osp=*(unsigned int *)(cpu+0x48);
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232 memcpy(context->d,cpu,0x40);
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233 context->membase = 0;
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234 context->pc = *(unsigned int *)(cpu+0x40);
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235 CycloneUnpack(context, NULL); // rebase PC
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236 context->irq = cpu[0x4c];
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237 context->state_flags = 0;
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239 context->state_flags |= 1;
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240 #elif defined(EMU_M68K)
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241 void *oldcontext = m68ki_cpu_p;
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242 m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);
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243 m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));
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244 memcpy(m68ki_cpu_p->dar,cpu,0x40);
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245 m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);
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246 m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET]=*(unsigned int *)(cpu+0x48);
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247 CPU_INT_LEVEL = cpu[0x4c] << 8;
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248 CPU_STOPPED = cpu[0x4d];
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249 m68k_set_context(oldcontext);
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250 #elif defined(EMU_F68K)
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251 M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
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252 memcpy(context->dreg,cpu,0x40);
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253 context->pc =*(unsigned int *)(cpu+0x40);
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254 context->sr =*(unsigned int *)(cpu+0x44);
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255 context->asp=*(unsigned int *)(cpu+0x48);
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256 context->interrupts[0] = cpu[0x4c];
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257 context->execinfo &= ~FM68K_HALTED;
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258 if (cpu[0x4d]&1) context->execinfo |= FM68K_HALTED;
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261 SekCycleCntS68k = *(unsigned int *)(cpu+0x50);
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263 Pico.t.m68c_cnt = *(unsigned int *)(cpu+0x50);
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267 /* idle loop detection, not to be used in CD mode */
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269 #include "cpu/cyclone/tools/idle.h"
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272 static unsigned short **idledet_ptrs = NULL;
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273 static int idledet_count = 0, idledet_bads = 0;
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274 static int idledet_start_frame = 0;
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277 #define IDLE_STATS 1
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278 unsigned int idlehit_addrs[128], idlehit_counts[128];
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280 void SekRegisterIdleHit(unsigned int pc)
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283 for (i = 0; i < 127 && idlehit_addrs[i]; i++) {
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284 if (idlehit_addrs[i] == pc) {
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285 idlehit_counts[i]++;
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289 idlehit_addrs[i] = pc;
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290 idlehit_counts[i] = 1;
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291 idlehit_addrs[i+1] = 0;
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295 void SekInitIdleDet(void)
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297 unsigned short **tmp;
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298 tmp = realloc(idledet_ptrs, 0x200 * sizeof(tmp[0]));
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300 free(idledet_ptrs);
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301 idledet_ptrs = NULL;
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304 idledet_ptrs = tmp;
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305 idledet_count = idledet_bads = 0;
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306 idledet_start_frame = Pico.m.frame_count + 360;
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308 idlehit_addrs[0] = 0;
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315 fm68k_idle_install();
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319 int SekIsIdleReady(void)
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321 return (Pico.m.frame_count >= idledet_start_frame);
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324 int SekIsIdleCode(unsigned short *dst, int bytes)
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326 // printf("SekIsIdleCode %04x %i\n", *dst, bytes);
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330 if ((*dst & 0xf000) != 0x6000) // not another branch
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334 if ( (*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w); tas ($xxxx.w)
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335 (*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX
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336 (*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX
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338 if (PicoIn.AHW & (PAHW_MCD|PAHW_32X))
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340 // with no addons, there should be no need to wait
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341 // for byte change anywhere
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342 if ( (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX)
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343 (*dst & 0xfff8) == 0x4a28) // tst.b ($xxxx,a0)
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347 if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM and
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348 *dst == 0x4a39 || // tst.b ($xxxxxxxx)
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349 *dst == 0x4a79 || // tst.w ($xxxxxxxx)
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350 *dst == 0x4ab9 || // tst.l ($xxxxxxxx)
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351 (*dst & 0xc1ff) == 0x0039 || // move.x ($xxxxxxxx), dX
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352 (*dst & 0xf13f) == 0xb039))||// cmp.x ($xxxxxxxx), dX
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353 *dst == 0x0838 || // btst $X, ($xxxx.w) [6 byte op]
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354 (*dst & 0xffbf) == 0x0c38) // cmpi.{b,w} $X, ($xxxx.w)
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358 if ( ((dst[2] & 0xe0) == 0xe0 && ( // RAM and
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359 *dst == 0x0839 || // btst $X, ($xxxxxxxx.w) [8 byte op]
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360 (*dst & 0xffbf) == 0x0c39))||// cmpi.{b,w} $X, ($xxxxxxxx)
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361 *dst == 0x0cb8) // cmpi.l $X, ($xxxx.w)
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365 if (PicoIn.AHW & (PAHW_MCD|PAHW_32X))
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367 if ( (*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX
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368 (dst[1]&0xf100) == 0x0000 && // arithmetic
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369 (dst[3]&0xf100) == 0x0000) // arithmetic
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377 int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop, void *ctx)
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379 int is_main68k = 1;
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383 #if defined(EMU_C68K)
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384 struct Cyclone *cyc = ctx;
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385 is_main68k = cyc == &PicoCpuCM68k;
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386 pc -= cyc->membase;
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387 #elif defined(EMU_F68K)
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388 is_main68k = ctx == &PicoCpuFM68k;
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391 if (!(newop&0x200))
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392 elprintf(EL_IDLE, "idle: patch %06x %04x %04x %c %c #%i", pc, oldop, newop,
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393 (newop&0x200)?'n':'y', is_main68k?'m':'s', idledet_count);
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395 // XXX: probably shouldn't patch RAM too
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396 v = m68k_read16_map[pc >> M68K_MEM_SHIFT];
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397 if (!(v & 0x80000000))
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398 target = (u16 *)((v << 1) + pc);
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400 if (++idledet_bads > 128)
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401 return 2; // remove detector
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402 return 1; // don't patch
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405 if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {
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406 unsigned short **tmp;
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407 tmp = realloc(idledet_ptrs, (idledet_count+0x200) * sizeof(tmp[0]));
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410 idledet_ptrs = tmp;
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413 idledet_ptrs[idledet_count++] = target;
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418 void SekFinishIdleDet(void)
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420 if (idledet_count < 0)
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423 CycloneFinishIdle();
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426 fm68k_idle_remove();
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428 while (idledet_count > 0)
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430 unsigned short *op = idledet_ptrs[--idledet_count];
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431 if ((*op & 0xfd00) == 0x7100)
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432 *op &= 0xff, *op |= 0x6600;
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433 else if ((*op & 0xfd00) == 0x7500)
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434 *op &= 0xff, *op |= 0x6700;
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435 else if ((*op & 0xfd00) == 0x7d00)
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436 *op &= 0xff, *op |= 0x6000;
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438 elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);
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440 idledet_count = -1;
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444 #if defined(CPU_CMP_R) || defined(CPU_CMP_W)
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454 struct ref_68k ref_68ks[2];
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455 static int current_68k;
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457 void SekTrace(int is_s68k)
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459 struct ref_68k *x68k = &ref_68ks[is_s68k];
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460 u32 pc = is_s68k ? SekPcS68k : SekPc;
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461 u32 sr = is_s68k ? SekSrS68k : SekSr;
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462 u32 cycles = is_s68k ? SekCycleCntS68k : Pico.t.m68c_cnt;
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468 if (is_s68k != current_68k) {
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469 current_68k = is_s68k;
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470 cmd = CTL_68K_SLAVE | current_68k;
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471 tl_write(&cmd, sizeof(cmd));
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473 if (pc != x68k->pc) {
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475 tl_write_uint(CTL_68K_PC, x68k->pc);
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477 if (sr != x68k->sr) {
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479 tl_write_uint(CTL_68K_SR, x68k->sr);
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481 for (i = 0; i < 16; i++) {
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482 r = is_s68k ? SekDarS68k(i) : SekDar(i);
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483 if (r != x68k->dar[i]) {
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485 tl_write_uint(CTL_68K_R + i, r);
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488 tl_write_uint(CTL_68K_CYCLES, cycles);
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494 int ret = tl_read(&cmd, sizeof(cmd));
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496 elprintf(EL_STATUS, "EOF");
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500 case CTL_68K_SLAVE:
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501 case CTL_68K_SLAVE + 1:
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502 current_68k = cmd & 1;
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505 tl_read_uint(&x68k->pc);
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508 tl_read_uint(&x68k->sr);
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510 case CTL_68K_CYCLES:
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511 tl_read_uint(&x68k->cycles);
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514 if (CTL_68K_R <= cmd && cmd < CTL_68K_R + 0x10)
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515 tl_read_uint(&x68k->dar[cmd - CTL_68K_R]);
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517 elprintf(EL_STATUS, "invalid cmd: %02x", cmd);
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522 if (is_s68k != current_68k) {
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523 printf("bad 68k: %d %d\n", is_s68k, current_68k);
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526 if (cycles != x68k->cycles) {
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527 printf("bad cycles: %u %u\n", cycles, x68k->cycles);
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530 if ((pc ^ x68k->pc) & 0xffffff) {
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531 printf("bad PC: %08x %08x\n", pc, x68k->pc);
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534 if (sr != x68k->sr) {
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535 printf("bad SR: %03x %03x\n", sr, x68k->sr);
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538 for (i = 0; i < 16; i++) {
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539 r = is_s68k ? SekDarS68k(i) : SekDar(i);
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540 if (r != x68k->dar[i]) {
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541 printf("bad %c%d: %08x %08x\n", i < 8 ? 'D' : 'A', i & 7,
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547 for (i = 0; i < 8; i++)
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548 printf("D%d: %08x A%d: %08x\n", i, x68k->dar[i],
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549 i, x68k->dar[i + 8]);
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550 printf("PC: %08x, %08x\n", x68k->pc, x68k->pc_prev);
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551 printf("SR: %04x\n", x68k->sr);
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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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