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-common.h" 22 #include "qemu.h" 23 #include "qemu/timer.h" 24 #include "user-internals.h" 25 #include "cpu_loop-common.h" 26 #include "signal-common.h" 27 28 static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env) 29 { 30 return cpu_get_host_ticks(); 31 } 32 33 uint64_t cpu_ppc_load_tbl(CPUPPCState *env) 34 { 35 return cpu_ppc_get_tb(env); 36 } 37 38 uint32_t cpu_ppc_load_tbu(CPUPPCState *env) 39 { 40 return cpu_ppc_get_tb(env) >> 32; 41 } 42 43 uint64_t cpu_ppc_load_atbl(CPUPPCState *env) 44 { 45 return cpu_ppc_get_tb(env); 46 } 47 48 uint32_t cpu_ppc_load_atbu(CPUPPCState *env) 49 { 50 return cpu_ppc_get_tb(env) >> 32; 51 } 52 53 uint64_t cpu_ppc_load_vtb(CPUPPCState *env) 54 { 55 return cpu_ppc_get_tb(env); 56 } 57 58 /* XXX: to be fixed */ 59 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) 60 { 61 return -1; 62 } 63 64 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) 65 { 66 return -1; 67 } 68 69 void cpu_loop(CPUPPCState *env) 70 { 71 CPUState *cs = env_cpu(env); 72 int trapnr, si_signo, si_code; 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 case POWERPC_EXCP_ISI: /* Instruction storage exception */ 98 /* FIXME: handle maperr in ppc_cpu_record_sigsegv. */ 99 force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, 100 env->spr[SPR_DAR]); 101 break; 102 case POWERPC_EXCP_EXTERNAL: /* External input */ 103 cpu_abort(cs, "External interrupt while in user mode. " 104 "Aborting\n"); 105 break; 106 case POWERPC_EXCP_PROGRAM: /* Program exception */ 107 case POWERPC_EXCP_HV_EMU: /* HV emulation */ 108 /* XXX: check this */ 109 switch (env->error_code & ~0xF) { 110 case POWERPC_EXCP_FP: 111 si_signo = TARGET_SIGFPE; 112 switch (env->error_code & 0xF) { 113 case POWERPC_EXCP_FP_OX: 114 si_code = TARGET_FPE_FLTOVF; 115 break; 116 case POWERPC_EXCP_FP_UX: 117 si_code = TARGET_FPE_FLTUND; 118 break; 119 case POWERPC_EXCP_FP_ZX: 120 case POWERPC_EXCP_FP_VXZDZ: 121 si_code = TARGET_FPE_FLTDIV; 122 break; 123 case POWERPC_EXCP_FP_XX: 124 si_code = TARGET_FPE_FLTRES; 125 break; 126 case POWERPC_EXCP_FP_VXSOFT: 127 si_code = TARGET_FPE_FLTINV; 128 break; 129 case POWERPC_EXCP_FP_VXSNAN: 130 case POWERPC_EXCP_FP_VXISI: 131 case POWERPC_EXCP_FP_VXIDI: 132 case POWERPC_EXCP_FP_VXIMZ: 133 case POWERPC_EXCP_FP_VXVC: 134 case POWERPC_EXCP_FP_VXSQRT: 135 case POWERPC_EXCP_FP_VXCVI: 136 si_code = TARGET_FPE_FLTSUB; 137 break; 138 default: 139 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n", 140 env->error_code); 141 si_code = 0; 142 break; 143 } 144 break; 145 case POWERPC_EXCP_INVAL: 146 si_signo = TARGET_SIGILL; 147 switch (env->error_code & 0xF) { 148 case POWERPC_EXCP_INVAL_INVAL: 149 si_code = TARGET_ILL_ILLOPC; 150 break; 151 case POWERPC_EXCP_INVAL_LSWX: 152 si_code = TARGET_ILL_ILLOPN; 153 break; 154 case POWERPC_EXCP_INVAL_SPR: 155 si_code = TARGET_ILL_PRVREG; 156 break; 157 case POWERPC_EXCP_INVAL_FP: 158 si_code = TARGET_ILL_COPROC; 159 break; 160 default: 161 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n", 162 env->error_code & 0xF); 163 si_code = TARGET_ILL_ILLADR; 164 break; 165 } 166 break; 167 case POWERPC_EXCP_PRIV: 168 si_signo = TARGET_SIGILL; 169 switch (env->error_code & 0xF) { 170 case POWERPC_EXCP_PRIV_OPC: 171 si_code = TARGET_ILL_PRVOPC; 172 break; 173 case POWERPC_EXCP_PRIV_REG: 174 si_code = TARGET_ILL_PRVREG; 175 break; 176 default: 177 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n", 178 env->error_code & 0xF); 179 si_code = TARGET_ILL_PRVOPC; 180 break; 181 } 182 break; 183 case POWERPC_EXCP_TRAP: 184 si_signo = TARGET_SIGTRAP; 185 si_code = TARGET_TRAP_BRKPT; 186 break; 187 default: 188 /* Should not happen ! */ 189 cpu_abort(cs, "Unknown program exception (%02x)\n", 190 env->error_code); 191 break; 192 } 193 force_sig_fault(si_signo, si_code, env->nip); 194 break; 195 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ 196 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ 197 case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ 198 case POWERPC_EXCP_VPU: /* Vector unavailable exception */ 199 force_sig_fault(TARGET_SIGILL, TARGET_ILL_COPROC, env->nip); 200 break; 201 case POWERPC_EXCP_SYSCALL: /* System call exception */ 202 case POWERPC_EXCP_SYSCALL_VECTORED: 203 cpu_abort(cs, "Syscall exception while in user mode. " 204 "Aborting\n"); 205 break; 206 case POWERPC_EXCP_DECR: /* Decrementer exception */ 207 cpu_abort(cs, "Decrementer interrupt while in user mode. " 208 "Aborting\n"); 209 break; 210 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ 211 cpu_abort(cs, "Fix interval timer interrupt while in user mode. " 212 "Aborting\n"); 213 break; 214 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ 215 cpu_abort(cs, "Watchdog timer interrupt while in user mode. " 216 "Aborting\n"); 217 break; 218 case POWERPC_EXCP_DTLB: /* Data TLB error */ 219 cpu_abort(cs, "Data TLB exception while in user mode. " 220 "Aborting\n"); 221 break; 222 case POWERPC_EXCP_ITLB: /* Instruction TLB error */ 223 cpu_abort(cs, "Instruction TLB exception while in user mode. " 224 "Aborting\n"); 225 break; 226 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ 227 cpu_abort(cs, "Embedded floating-point data IRQ not handled\n"); 228 break; 229 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ 230 cpu_abort(cs, "Embedded floating-point round IRQ not handled\n"); 231 break; 232 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ 233 cpu_abort(cs, "Performance monitor exception not handled\n"); 234 break; 235 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ 236 cpu_abort(cs, "Doorbell interrupt while in user mode. " 237 "Aborting\n"); 238 break; 239 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ 240 cpu_abort(cs, "Doorbell critical interrupt while in user mode. " 241 "Aborting\n"); 242 break; 243 case POWERPC_EXCP_RESET: /* System reset exception */ 244 cpu_abort(cs, "Reset interrupt while in user mode. " 245 "Aborting\n"); 246 break; 247 case POWERPC_EXCP_DSEG: /* Data segment exception */ 248 cpu_abort(cs, "Data segment exception while in user mode. " 249 "Aborting\n"); 250 break; 251 case POWERPC_EXCP_ISEG: /* Instruction segment exception */ 252 cpu_abort(cs, "Instruction segment exception " 253 "while in user mode. Aborting\n"); 254 break; 255 /* PowerPC 64 with hypervisor mode support */ 256 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ 257 cpu_abort(cs, "Hypervisor decrementer interrupt " 258 "while in user mode. Aborting\n"); 259 break; 260 case POWERPC_EXCP_TRACE: /* Trace exception */ 261 /* Nothing to do: 262 * we use this exception to emulate step-by-step execution mode. 263 */ 264 break; 265 /* PowerPC 64 with hypervisor mode support */ 266 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ 267 cpu_abort(cs, "Hypervisor data storage exception " 268 "while in user mode. Aborting\n"); 269 break; 270 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ 271 cpu_abort(cs, "Hypervisor instruction storage exception " 272 "while in user mode. Aborting\n"); 273 break; 274 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ 275 cpu_abort(cs, "Hypervisor data segment exception " 276 "while in user mode. Aborting\n"); 277 break; 278 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ 279 cpu_abort(cs, "Hypervisor instruction segment exception " 280 "while in user mode. Aborting\n"); 281 break; 282 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ 283 cpu_abort(cs, "Programmable interval timer interrupt " 284 "while in user mode. Aborting\n"); 285 break; 286 case POWERPC_EXCP_EMUL: /* Emulation trap exception */ 287 cpu_abort(cs, "Emulation trap exception not handled\n"); 288 break; 289 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ 290 cpu_abort(cs, "Instruction fetch TLB exception " 291 "while in user-mode. Aborting"); 292 break; 293 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ 294 cpu_abort(cs, "Data load TLB exception while in user-mode. " 295 "Aborting"); 296 break; 297 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ 298 cpu_abort(cs, "Data store TLB exception while in user-mode. " 299 "Aborting"); 300 break; 301 case POWERPC_EXCP_FPA: /* Floating-point assist exception */ 302 cpu_abort(cs, "Floating-point assist exception not handled\n"); 303 break; 304 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ 305 cpu_abort(cs, "Instruction address breakpoint exception " 306 "not handled\n"); 307 break; 308 case POWERPC_EXCP_SMI: /* System management interrupt */ 309 cpu_abort(cs, "System management interrupt while in user mode. " 310 "Aborting\n"); 311 break; 312 case POWERPC_EXCP_THERM: /* Thermal interrupt */ 313 cpu_abort(cs, "Thermal interrupt interrupt while in user mode. " 314 "Aborting\n"); 315 break; 316 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ 317 cpu_abort(cs, "Performance monitor exception not handled\n"); 318 break; 319 case POWERPC_EXCP_VPUA: /* Vector assist exception */ 320 cpu_abort(cs, "Vector assist exception not handled\n"); 321 break; 322 case POWERPC_EXCP_SOFTP: /* Soft patch exception */ 323 cpu_abort(cs, "Soft patch exception not handled\n"); 324 break; 325 case POWERPC_EXCP_MAINT: /* Maintenance exception */ 326 cpu_abort(cs, "Maintenance exception while in user mode. " 327 "Aborting\n"); 328 break; 329 case POWERPC_EXCP_SYSCALL_USER: 330 /* system call in user-mode emulation */ 331 /* WARNING: 332 * PPC ABI uses overflow flag in cr0 to signal an error 333 * in syscalls. 334 */ 335 env->crf[0] &= ~0x1; 336 env->nip += 4; 337 ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], 338 env->gpr[5], env->gpr[6], env->gpr[7], 339 env->gpr[8], 0, 0); 340 if (ret == -QEMU_ERESTARTSYS) { 341 env->nip -= 4; 342 break; 343 } 344 if (ret == (target_ulong)(-QEMU_ESIGRETURN)) { 345 /* Returning from a successful sigreturn syscall. 346 Avoid corrupting register state. */ 347 break; 348 } 349 if (ret > (target_ulong)(-515)) { 350 env->crf[0] |= 0x1; 351 ret = -ret; 352 } 353 env->gpr[3] = ret; 354 break; 355 case EXCP_DEBUG: 356 force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->nip); 357 break; 358 case EXCP_INTERRUPT: 359 /* just indicate that signals should be handled asap */ 360 break; 361 case EXCP_ATOMIC: 362 cpu_exec_step_atomic(cs); 363 arch_interrupt = false; 364 break; 365 default: 366 cpu_abort(cs, "Unknown exception 0x%x. Aborting\n", trapnr); 367 break; 368 } 369 process_pending_signals(env); 370 371 /* Most of the traps imply a transition through kernel mode, 372 * which implies an REI instruction has been executed. Which 373 * means that RX and LOCK_ADDR should be cleared. But there 374 * are a few exceptions for traps internal to QEMU. 375 */ 376 if (arch_interrupt) { 377 env->reserve_addr = -1; 378 } 379 } 380 } 381 382 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 383 { 384 int i; 385 386 #if defined(TARGET_PPC64) 387 int flag = (env->insns_flags2 & PPC2_BOOKE206) ? MSR_CM : MSR_SF; 388 #if defined(TARGET_ABI32) 389 ppc_store_msr(env, env->msr & ~((target_ulong)1 << flag)); 390 #else 391 ppc_store_msr(env, env->msr | (target_ulong)1 << flag); 392 #endif 393 #endif 394 395 env->nip = regs->nip; 396 for(i = 0; i < 32; i++) { 397 env->gpr[i] = regs->gpr[i]; 398 } 399 } 400