1 /* 2 * qemu user cpu loop 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu.h" 22 #include "cpu_loop-common.h" 23 24 static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env) 25 { 26 return cpu_get_host_ticks(); 27 } 28 29 uint64_t cpu_ppc_load_tbl(CPUPPCState *env) 30 { 31 return cpu_ppc_get_tb(env); 32 } 33 34 uint32_t cpu_ppc_load_tbu(CPUPPCState *env) 35 { 36 return cpu_ppc_get_tb(env) >> 32; 37 } 38 39 uint64_t cpu_ppc_load_atbl(CPUPPCState *env) 40 { 41 return cpu_ppc_get_tb(env); 42 } 43 44 uint32_t cpu_ppc_load_atbu(CPUPPCState *env) 45 { 46 return cpu_ppc_get_tb(env) >> 32; 47 } 48 49 uint32_t cpu_ppc601_load_rtcu(CPUPPCState *env) 50 __attribute__ (( alias ("cpu_ppc_load_tbu") )); 51 52 uint32_t cpu_ppc601_load_rtcl(CPUPPCState *env) 53 { 54 return cpu_ppc_load_tbl(env) & 0x3FFFFF80; 55 } 56 57 /* XXX: to be fixed */ 58 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) 59 { 60 return -1; 61 } 62 63 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) 64 { 65 return -1; 66 } 67 68 void cpu_loop(CPUPPCState *env) 69 { 70 CPUState *cs = CPU(ppc_env_get_cpu(env)); 71 target_siginfo_t info; 72 int trapnr, sig; 73 target_ulong ret; 74 75 for(;;) { 76 bool arch_interrupt; 77 78 cpu_exec_start(cs); 79 trapnr = cpu_exec(cs); 80 cpu_exec_end(cs); 81 process_queued_cpu_work(cs); 82 83 arch_interrupt = true; 84 switch (trapnr) { 85 case POWERPC_EXCP_NONE: 86 /* Just go on */ 87 break; 88 case POWERPC_EXCP_CRITICAL: /* Critical input */ 89 cpu_abort(cs, "Critical interrupt while in user mode. " 90 "Aborting\n"); 91 break; 92 case POWERPC_EXCP_MCHECK: /* Machine check exception */ 93 cpu_abort(cs, "Machine check exception while in user mode. " 94 "Aborting\n"); 95 break; 96 case POWERPC_EXCP_DSI: /* Data storage exception */ 97 /* XXX: check this. Seems bugged */ 98 switch (env->error_code & 0xFF000000) { 99 case 0x40000000: 100 case 0x42000000: 101 info.si_signo = TARGET_SIGSEGV; 102 info.si_errno = 0; 103 info.si_code = TARGET_SEGV_MAPERR; 104 break; 105 case 0x04000000: 106 info.si_signo = TARGET_SIGILL; 107 info.si_errno = 0; 108 info.si_code = TARGET_ILL_ILLADR; 109 break; 110 case 0x08000000: 111 info.si_signo = TARGET_SIGSEGV; 112 info.si_errno = 0; 113 info.si_code = TARGET_SEGV_ACCERR; 114 break; 115 default: 116 /* Let's send a regular segfault... */ 117 EXCP_DUMP(env, "Invalid segfault errno (%02x)\n", 118 env->error_code); 119 info.si_signo = TARGET_SIGSEGV; 120 info.si_errno = 0; 121 info.si_code = TARGET_SEGV_MAPERR; 122 break; 123 } 124 info._sifields._sigfault._addr = env->spr[SPR_DAR]; 125 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 126 break; 127 case POWERPC_EXCP_ISI: /* Instruction storage exception */ 128 /* XXX: check this */ 129 switch (env->error_code & 0xFF000000) { 130 case 0x40000000: 131 info.si_signo = TARGET_SIGSEGV; 132 info.si_errno = 0; 133 info.si_code = TARGET_SEGV_MAPERR; 134 break; 135 case 0x10000000: 136 case 0x08000000: 137 info.si_signo = TARGET_SIGSEGV; 138 info.si_errno = 0; 139 info.si_code = TARGET_SEGV_ACCERR; 140 break; 141 default: 142 /* Let's send a regular segfault... */ 143 EXCP_DUMP(env, "Invalid segfault errno (%02x)\n", 144 env->error_code); 145 info.si_signo = TARGET_SIGSEGV; 146 info.si_errno = 0; 147 info.si_code = TARGET_SEGV_MAPERR; 148 break; 149 } 150 info._sifields._sigfault._addr = env->nip - 4; 151 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 152 break; 153 case POWERPC_EXCP_EXTERNAL: /* External input */ 154 cpu_abort(cs, "External interrupt while in user mode. " 155 "Aborting\n"); 156 break; 157 case POWERPC_EXCP_ALIGN: /* Alignment exception */ 158 /* XXX: check this */ 159 info.si_signo = TARGET_SIGBUS; 160 info.si_errno = 0; 161 info.si_code = TARGET_BUS_ADRALN; 162 info._sifields._sigfault._addr = env->nip; 163 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 164 break; 165 case POWERPC_EXCP_PROGRAM: /* Program exception */ 166 case POWERPC_EXCP_HV_EMU: /* HV emulation */ 167 /* XXX: check this */ 168 switch (env->error_code & ~0xF) { 169 case POWERPC_EXCP_FP: 170 info.si_signo = TARGET_SIGFPE; 171 info.si_errno = 0; 172 switch (env->error_code & 0xF) { 173 case POWERPC_EXCP_FP_OX: 174 info.si_code = TARGET_FPE_FLTOVF; 175 break; 176 case POWERPC_EXCP_FP_UX: 177 info.si_code = TARGET_FPE_FLTUND; 178 break; 179 case POWERPC_EXCP_FP_ZX: 180 case POWERPC_EXCP_FP_VXZDZ: 181 info.si_code = TARGET_FPE_FLTDIV; 182 break; 183 case POWERPC_EXCP_FP_XX: 184 info.si_code = TARGET_FPE_FLTRES; 185 break; 186 case POWERPC_EXCP_FP_VXSOFT: 187 info.si_code = TARGET_FPE_FLTINV; 188 break; 189 case POWERPC_EXCP_FP_VXSNAN: 190 case POWERPC_EXCP_FP_VXISI: 191 case POWERPC_EXCP_FP_VXIDI: 192 case POWERPC_EXCP_FP_VXIMZ: 193 case POWERPC_EXCP_FP_VXVC: 194 case POWERPC_EXCP_FP_VXSQRT: 195 case POWERPC_EXCP_FP_VXCVI: 196 info.si_code = TARGET_FPE_FLTSUB; 197 break; 198 default: 199 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n", 200 env->error_code); 201 break; 202 } 203 break; 204 case POWERPC_EXCP_INVAL: 205 info.si_signo = TARGET_SIGILL; 206 info.si_errno = 0; 207 switch (env->error_code & 0xF) { 208 case POWERPC_EXCP_INVAL_INVAL: 209 info.si_code = TARGET_ILL_ILLOPC; 210 break; 211 case POWERPC_EXCP_INVAL_LSWX: 212 info.si_code = TARGET_ILL_ILLOPN; 213 break; 214 case POWERPC_EXCP_INVAL_SPR: 215 info.si_code = TARGET_ILL_PRVREG; 216 break; 217 case POWERPC_EXCP_INVAL_FP: 218 info.si_code = TARGET_ILL_COPROC; 219 break; 220 default: 221 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n", 222 env->error_code & 0xF); 223 info.si_code = TARGET_ILL_ILLADR; 224 break; 225 } 226 break; 227 case POWERPC_EXCP_PRIV: 228 info.si_signo = TARGET_SIGILL; 229 info.si_errno = 0; 230 switch (env->error_code & 0xF) { 231 case POWERPC_EXCP_PRIV_OPC: 232 info.si_code = TARGET_ILL_PRVOPC; 233 break; 234 case POWERPC_EXCP_PRIV_REG: 235 info.si_code = TARGET_ILL_PRVREG; 236 break; 237 default: 238 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n", 239 env->error_code & 0xF); 240 info.si_code = TARGET_ILL_PRVOPC; 241 break; 242 } 243 break; 244 case POWERPC_EXCP_TRAP: 245 cpu_abort(cs, "Tried to call a TRAP\n"); 246 break; 247 default: 248 /* Should not happen ! */ 249 cpu_abort(cs, "Unknown program exception (%02x)\n", 250 env->error_code); 251 break; 252 } 253 info._sifields._sigfault._addr = env->nip; 254 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 255 break; 256 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ 257 info.si_signo = TARGET_SIGILL; 258 info.si_errno = 0; 259 info.si_code = TARGET_ILL_COPROC; 260 info._sifields._sigfault._addr = env->nip; 261 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 262 break; 263 case POWERPC_EXCP_SYSCALL: /* System call exception */ 264 cpu_abort(cs, "Syscall exception while in user mode. " 265 "Aborting\n"); 266 break; 267 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ 268 info.si_signo = TARGET_SIGILL; 269 info.si_errno = 0; 270 info.si_code = TARGET_ILL_COPROC; 271 info._sifields._sigfault._addr = env->nip; 272 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 273 break; 274 case POWERPC_EXCP_DECR: /* Decrementer exception */ 275 cpu_abort(cs, "Decrementer interrupt while in user mode. " 276 "Aborting\n"); 277 break; 278 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ 279 cpu_abort(cs, "Fix interval timer interrupt while in user mode. " 280 "Aborting\n"); 281 break; 282 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ 283 cpu_abort(cs, "Watchdog timer interrupt while in user mode. " 284 "Aborting\n"); 285 break; 286 case POWERPC_EXCP_DTLB: /* Data TLB error */ 287 cpu_abort(cs, "Data TLB exception while in user mode. " 288 "Aborting\n"); 289 break; 290 case POWERPC_EXCP_ITLB: /* Instruction TLB error */ 291 cpu_abort(cs, "Instruction TLB exception while in user mode. " 292 "Aborting\n"); 293 break; 294 case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ 295 info.si_signo = TARGET_SIGILL; 296 info.si_errno = 0; 297 info.si_code = TARGET_ILL_COPROC; 298 info._sifields._sigfault._addr = env->nip; 299 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 300 break; 301 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ 302 cpu_abort(cs, "Embedded floating-point data IRQ not handled\n"); 303 break; 304 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ 305 cpu_abort(cs, "Embedded floating-point round IRQ not handled\n"); 306 break; 307 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ 308 cpu_abort(cs, "Performance monitor exception not handled\n"); 309 break; 310 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ 311 cpu_abort(cs, "Doorbell interrupt while in user mode. " 312 "Aborting\n"); 313 break; 314 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ 315 cpu_abort(cs, "Doorbell critical interrupt while in user mode. " 316 "Aborting\n"); 317 break; 318 case POWERPC_EXCP_RESET: /* System reset exception */ 319 cpu_abort(cs, "Reset interrupt while in user mode. " 320 "Aborting\n"); 321 break; 322 case POWERPC_EXCP_DSEG: /* Data segment exception */ 323 cpu_abort(cs, "Data segment exception while in user mode. " 324 "Aborting\n"); 325 break; 326 case POWERPC_EXCP_ISEG: /* Instruction segment exception */ 327 cpu_abort(cs, "Instruction segment exception " 328 "while in user mode. Aborting\n"); 329 break; 330 /* PowerPC 64 with hypervisor mode support */ 331 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ 332 cpu_abort(cs, "Hypervisor decrementer interrupt " 333 "while in user mode. Aborting\n"); 334 break; 335 case POWERPC_EXCP_TRACE: /* Trace exception */ 336 /* Nothing to do: 337 * we use this exception to emulate step-by-step execution mode. 338 */ 339 break; 340 /* PowerPC 64 with hypervisor mode support */ 341 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ 342 cpu_abort(cs, "Hypervisor data storage exception " 343 "while in user mode. Aborting\n"); 344 break; 345 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ 346 cpu_abort(cs, "Hypervisor instruction storage exception " 347 "while in user mode. Aborting\n"); 348 break; 349 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ 350 cpu_abort(cs, "Hypervisor data segment exception " 351 "while in user mode. Aborting\n"); 352 break; 353 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ 354 cpu_abort(cs, "Hypervisor instruction segment exception " 355 "while in user mode. Aborting\n"); 356 break; 357 case POWERPC_EXCP_VPU: /* Vector unavailable exception */ 358 info.si_signo = TARGET_SIGILL; 359 info.si_errno = 0; 360 info.si_code = TARGET_ILL_COPROC; 361 info._sifields._sigfault._addr = env->nip; 362 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 363 break; 364 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ 365 cpu_abort(cs, "Programmable interval timer interrupt " 366 "while in user mode. Aborting\n"); 367 break; 368 case POWERPC_EXCP_IO: /* IO error exception */ 369 cpu_abort(cs, "IO error exception while in user mode. " 370 "Aborting\n"); 371 break; 372 case POWERPC_EXCP_RUNM: /* Run mode exception */ 373 cpu_abort(cs, "Run mode exception while in user mode. " 374 "Aborting\n"); 375 break; 376 case POWERPC_EXCP_EMUL: /* Emulation trap exception */ 377 cpu_abort(cs, "Emulation trap exception not handled\n"); 378 break; 379 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ 380 cpu_abort(cs, "Instruction fetch TLB exception " 381 "while in user-mode. Aborting"); 382 break; 383 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ 384 cpu_abort(cs, "Data load TLB exception while in user-mode. " 385 "Aborting"); 386 break; 387 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ 388 cpu_abort(cs, "Data store TLB exception while in user-mode. " 389 "Aborting"); 390 break; 391 case POWERPC_EXCP_FPA: /* Floating-point assist exception */ 392 cpu_abort(cs, "Floating-point assist exception not handled\n"); 393 break; 394 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ 395 cpu_abort(cs, "Instruction address breakpoint exception " 396 "not handled\n"); 397 break; 398 case POWERPC_EXCP_SMI: /* System management interrupt */ 399 cpu_abort(cs, "System management interrupt while in user mode. " 400 "Aborting\n"); 401 break; 402 case POWERPC_EXCP_THERM: /* Thermal interrupt */ 403 cpu_abort(cs, "Thermal interrupt interrupt while in user mode. " 404 "Aborting\n"); 405 break; 406 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ 407 cpu_abort(cs, "Performance monitor exception not handled\n"); 408 break; 409 case POWERPC_EXCP_VPUA: /* Vector assist exception */ 410 cpu_abort(cs, "Vector assist exception not handled\n"); 411 break; 412 case POWERPC_EXCP_SOFTP: /* Soft patch exception */ 413 cpu_abort(cs, "Soft patch exception not handled\n"); 414 break; 415 case POWERPC_EXCP_MAINT: /* Maintenance exception */ 416 cpu_abort(cs, "Maintenance exception while in user mode. " 417 "Aborting\n"); 418 break; 419 case POWERPC_EXCP_STOP: /* stop translation */ 420 /* We did invalidate the instruction cache. Go on */ 421 break; 422 case POWERPC_EXCP_BRANCH: /* branch instruction: */ 423 /* We just stopped because of a branch. Go on */ 424 break; 425 case POWERPC_EXCP_SYSCALL_USER: 426 /* system call in user-mode emulation */ 427 /* WARNING: 428 * PPC ABI uses overflow flag in cr0 to signal an error 429 * in syscalls. 430 */ 431 env->crf[0] &= ~0x1; 432 env->nip += 4; 433 ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], 434 env->gpr[5], env->gpr[6], env->gpr[7], 435 env->gpr[8], 0, 0); 436 if (ret == -TARGET_ERESTARTSYS) { 437 env->nip -= 4; 438 break; 439 } 440 if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) { 441 /* Returning from a successful sigreturn syscall. 442 Avoid corrupting register state. */ 443 break; 444 } 445 if (ret > (target_ulong)(-515)) { 446 env->crf[0] |= 0x1; 447 ret = -ret; 448 } 449 env->gpr[3] = ret; 450 break; 451 case EXCP_DEBUG: 452 sig = gdb_handlesig(cs, TARGET_SIGTRAP); 453 if (sig) { 454 info.si_signo = sig; 455 info.si_errno = 0; 456 info.si_code = TARGET_TRAP_BRKPT; 457 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 458 } else { 459 arch_interrupt = false; 460 } 461 break; 462 case EXCP_INTERRUPT: 463 /* just indicate that signals should be handled asap */ 464 break; 465 case EXCP_ATOMIC: 466 cpu_exec_step_atomic(cs); 467 arch_interrupt = false; 468 break; 469 default: 470 cpu_abort(cs, "Unknown exception 0x%x. Aborting\n", trapnr); 471 break; 472 } 473 process_pending_signals(env); 474 475 /* Most of the traps imply a transition through kernel mode, 476 * which implies an REI instruction has been executed. Which 477 * means that RX and LOCK_ADDR should be cleared. But there 478 * are a few exceptions for traps internal to QEMU. 479 */ 480 if (arch_interrupt) { 481 env->reserve_addr = -1; 482 } 483 } 484 } 485 486 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 487 { 488 int i; 489 490 #if defined(TARGET_PPC64) 491 int flag = (env->insns_flags2 & PPC2_BOOKE206) ? MSR_CM : MSR_SF; 492 #if defined(TARGET_ABI32) 493 env->msr &= ~((target_ulong)1 << flag); 494 #else 495 env->msr |= (target_ulong)1 << flag; 496 #endif 497 #endif 498 env->nip = regs->nip; 499 for(i = 0; i < 32; i++) { 500 env->gpr[i] = regs->gpr[i]; 501 } 502 } 503