1 /* 2 * QEMU generic PowerPC hardware System Emulator 3 * 4 * Copyright (c) 2003-2007 Jocelyn Mayer 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 #include "qemu-common.h" 26 #include "cpu.h" 27 #include "hw/hw.h" 28 #include "hw/ppc/ppc.h" 29 #include "hw/ppc/ppc_e500.h" 30 #include "qemu/timer.h" 31 #include "sysemu/sysemu.h" 32 #include "sysemu/cpus.h" 33 #include "qemu/log.h" 34 #include "qemu/error-report.h" 35 #include "sysemu/kvm.h" 36 #include "kvm_ppc.h" 37 #include "trace.h" 38 39 //#define PPC_DEBUG_IRQ 40 //#define PPC_DEBUG_TB 41 42 #ifdef PPC_DEBUG_IRQ 43 # define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) 44 #else 45 # define LOG_IRQ(...) do { } while (0) 46 #endif 47 48 49 #ifdef PPC_DEBUG_TB 50 # define LOG_TB(...) qemu_log(__VA_ARGS__) 51 #else 52 # define LOG_TB(...) do { } while (0) 53 #endif 54 55 static void cpu_ppc_tb_stop (CPUPPCState *env); 56 static void cpu_ppc_tb_start (CPUPPCState *env); 57 58 void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level) 59 { 60 CPUState *cs = CPU(cpu); 61 CPUPPCState *env = &cpu->env; 62 unsigned int old_pending; 63 bool locked = false; 64 65 /* We may already have the BQL if coming from the reset path */ 66 if (!qemu_mutex_iothread_locked()) { 67 locked = true; 68 qemu_mutex_lock_iothread(); 69 } 70 71 old_pending = env->pending_interrupts; 72 73 if (level) { 74 env->pending_interrupts |= 1 << n_IRQ; 75 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 76 } else { 77 env->pending_interrupts &= ~(1 << n_IRQ); 78 if (env->pending_interrupts == 0) { 79 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 80 } 81 } 82 83 if (old_pending != env->pending_interrupts) { 84 #ifdef CONFIG_KVM 85 kvmppc_set_interrupt(cpu, n_IRQ, level); 86 #endif 87 } 88 89 90 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32 91 "req %08x\n", __func__, env, n_IRQ, level, 92 env->pending_interrupts, CPU(cpu)->interrupt_request); 93 94 if (locked) { 95 qemu_mutex_unlock_iothread(); 96 } 97 } 98 99 /* PowerPC 6xx / 7xx internal IRQ controller */ 100 static void ppc6xx_set_irq(void *opaque, int pin, int level) 101 { 102 PowerPCCPU *cpu = opaque; 103 CPUPPCState *env = &cpu->env; 104 int cur_level; 105 106 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 107 env, pin, level); 108 cur_level = (env->irq_input_state >> pin) & 1; 109 /* Don't generate spurious events */ 110 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { 111 CPUState *cs = CPU(cpu); 112 113 switch (pin) { 114 case PPC6xx_INPUT_TBEN: 115 /* Level sensitive - active high */ 116 LOG_IRQ("%s: %s the time base\n", 117 __func__, level ? "start" : "stop"); 118 if (level) { 119 cpu_ppc_tb_start(env); 120 } else { 121 cpu_ppc_tb_stop(env); 122 } 123 case PPC6xx_INPUT_INT: 124 /* Level sensitive - active high */ 125 LOG_IRQ("%s: set the external IRQ state to %d\n", 126 __func__, level); 127 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 128 break; 129 case PPC6xx_INPUT_SMI: 130 /* Level sensitive - active high */ 131 LOG_IRQ("%s: set the SMI IRQ state to %d\n", 132 __func__, level); 133 ppc_set_irq(cpu, PPC_INTERRUPT_SMI, level); 134 break; 135 case PPC6xx_INPUT_MCP: 136 /* Negative edge sensitive */ 137 /* XXX: TODO: actual reaction may depends on HID0 status 138 * 603/604/740/750: check HID0[EMCP] 139 */ 140 if (cur_level == 1 && level == 0) { 141 LOG_IRQ("%s: raise machine check state\n", 142 __func__); 143 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1); 144 } 145 break; 146 case PPC6xx_INPUT_CKSTP_IN: 147 /* Level sensitive - active low */ 148 /* XXX: TODO: relay the signal to CKSTP_OUT pin */ 149 /* XXX: Note that the only way to restart the CPU is to reset it */ 150 if (level) { 151 LOG_IRQ("%s: stop the CPU\n", __func__); 152 cs->halted = 1; 153 } 154 break; 155 case PPC6xx_INPUT_HRESET: 156 /* Level sensitive - active low */ 157 if (level) { 158 LOG_IRQ("%s: reset the CPU\n", __func__); 159 cpu_interrupt(cs, CPU_INTERRUPT_RESET); 160 } 161 break; 162 case PPC6xx_INPUT_SRESET: 163 LOG_IRQ("%s: set the RESET IRQ state to %d\n", 164 __func__, level); 165 ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level); 166 break; 167 default: 168 /* Unknown pin - do nothing */ 169 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 170 return; 171 } 172 if (level) 173 env->irq_input_state |= 1 << pin; 174 else 175 env->irq_input_state &= ~(1 << pin); 176 } 177 } 178 179 void ppc6xx_irq_init(PowerPCCPU *cpu) 180 { 181 CPUPPCState *env = &cpu->env; 182 183 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, cpu, 184 PPC6xx_INPUT_NB); 185 } 186 187 #if defined(TARGET_PPC64) 188 /* PowerPC 970 internal IRQ controller */ 189 static void ppc970_set_irq(void *opaque, int pin, int level) 190 { 191 PowerPCCPU *cpu = opaque; 192 CPUPPCState *env = &cpu->env; 193 int cur_level; 194 195 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 196 env, pin, level); 197 cur_level = (env->irq_input_state >> pin) & 1; 198 /* Don't generate spurious events */ 199 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { 200 CPUState *cs = CPU(cpu); 201 202 switch (pin) { 203 case PPC970_INPUT_INT: 204 /* Level sensitive - active high */ 205 LOG_IRQ("%s: set the external IRQ state to %d\n", 206 __func__, level); 207 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 208 break; 209 case PPC970_INPUT_THINT: 210 /* Level sensitive - active high */ 211 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__, 212 level); 213 ppc_set_irq(cpu, PPC_INTERRUPT_THERM, level); 214 break; 215 case PPC970_INPUT_MCP: 216 /* Negative edge sensitive */ 217 /* XXX: TODO: actual reaction may depends on HID0 status 218 * 603/604/740/750: check HID0[EMCP] 219 */ 220 if (cur_level == 1 && level == 0) { 221 LOG_IRQ("%s: raise machine check state\n", 222 __func__); 223 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1); 224 } 225 break; 226 case PPC970_INPUT_CKSTP: 227 /* Level sensitive - active low */ 228 /* XXX: TODO: relay the signal to CKSTP_OUT pin */ 229 if (level) { 230 LOG_IRQ("%s: stop the CPU\n", __func__); 231 cs->halted = 1; 232 } else { 233 LOG_IRQ("%s: restart the CPU\n", __func__); 234 cs->halted = 0; 235 qemu_cpu_kick(cs); 236 } 237 break; 238 case PPC970_INPUT_HRESET: 239 /* Level sensitive - active low */ 240 if (level) { 241 cpu_interrupt(cs, CPU_INTERRUPT_RESET); 242 } 243 break; 244 case PPC970_INPUT_SRESET: 245 LOG_IRQ("%s: set the RESET IRQ state to %d\n", 246 __func__, level); 247 ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level); 248 break; 249 case PPC970_INPUT_TBEN: 250 LOG_IRQ("%s: set the TBEN state to %d\n", __func__, 251 level); 252 /* XXX: TODO */ 253 break; 254 default: 255 /* Unknown pin - do nothing */ 256 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 257 return; 258 } 259 if (level) 260 env->irq_input_state |= 1 << pin; 261 else 262 env->irq_input_state &= ~(1 << pin); 263 } 264 } 265 266 void ppc970_irq_init(PowerPCCPU *cpu) 267 { 268 CPUPPCState *env = &cpu->env; 269 270 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, cpu, 271 PPC970_INPUT_NB); 272 } 273 274 /* POWER7 internal IRQ controller */ 275 static void power7_set_irq(void *opaque, int pin, int level) 276 { 277 PowerPCCPU *cpu = opaque; 278 CPUPPCState *env = &cpu->env; 279 280 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 281 env, pin, level); 282 283 switch (pin) { 284 case POWER7_INPUT_INT: 285 /* Level sensitive - active high */ 286 LOG_IRQ("%s: set the external IRQ state to %d\n", 287 __func__, level); 288 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 289 break; 290 default: 291 /* Unknown pin - do nothing */ 292 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 293 return; 294 } 295 if (level) { 296 env->irq_input_state |= 1 << pin; 297 } else { 298 env->irq_input_state &= ~(1 << pin); 299 } 300 } 301 302 void ppcPOWER7_irq_init(PowerPCCPU *cpu) 303 { 304 CPUPPCState *env = &cpu->env; 305 306 env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, cpu, 307 POWER7_INPUT_NB); 308 } 309 310 /* POWER9 internal IRQ controller */ 311 static void power9_set_irq(void *opaque, int pin, int level) 312 { 313 PowerPCCPU *cpu = opaque; 314 CPUPPCState *env = &cpu->env; 315 316 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 317 env, pin, level); 318 319 switch (pin) { 320 case POWER9_INPUT_INT: 321 /* Level sensitive - active high */ 322 LOG_IRQ("%s: set the external IRQ state to %d\n", 323 __func__, level); 324 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 325 break; 326 case POWER9_INPUT_HINT: 327 /* Level sensitive - active high */ 328 LOG_IRQ("%s: set the external IRQ state to %d\n", 329 __func__, level); 330 ppc_set_irq(cpu, PPC_INTERRUPT_HVIRT, level); 331 break; 332 default: 333 /* Unknown pin - do nothing */ 334 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 335 return; 336 } 337 if (level) { 338 env->irq_input_state |= 1 << pin; 339 } else { 340 env->irq_input_state &= ~(1 << pin); 341 } 342 } 343 344 void ppcPOWER9_irq_init(PowerPCCPU *cpu) 345 { 346 CPUPPCState *env = &cpu->env; 347 348 env->irq_inputs = (void **)qemu_allocate_irqs(&power9_set_irq, cpu, 349 POWER9_INPUT_NB); 350 } 351 #endif /* defined(TARGET_PPC64) */ 352 353 void ppc40x_core_reset(PowerPCCPU *cpu) 354 { 355 CPUPPCState *env = &cpu->env; 356 target_ulong dbsr; 357 358 qemu_log_mask(CPU_LOG_RESET, "Reset PowerPC core\n"); 359 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_RESET); 360 dbsr = env->spr[SPR_40x_DBSR]; 361 dbsr &= ~0x00000300; 362 dbsr |= 0x00000100; 363 env->spr[SPR_40x_DBSR] = dbsr; 364 } 365 366 void ppc40x_chip_reset(PowerPCCPU *cpu) 367 { 368 CPUPPCState *env = &cpu->env; 369 target_ulong dbsr; 370 371 qemu_log_mask(CPU_LOG_RESET, "Reset PowerPC chip\n"); 372 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_RESET); 373 /* XXX: TODO reset all internal peripherals */ 374 dbsr = env->spr[SPR_40x_DBSR]; 375 dbsr &= ~0x00000300; 376 dbsr |= 0x00000200; 377 env->spr[SPR_40x_DBSR] = dbsr; 378 } 379 380 void ppc40x_system_reset(PowerPCCPU *cpu) 381 { 382 qemu_log_mask(CPU_LOG_RESET, "Reset PowerPC system\n"); 383 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 384 } 385 386 void store_40x_dbcr0(CPUPPCState *env, uint32_t val) 387 { 388 PowerPCCPU *cpu = ppc_env_get_cpu(env); 389 390 switch ((val >> 28) & 0x3) { 391 case 0x0: 392 /* No action */ 393 break; 394 case 0x1: 395 /* Core reset */ 396 ppc40x_core_reset(cpu); 397 break; 398 case 0x2: 399 /* Chip reset */ 400 ppc40x_chip_reset(cpu); 401 break; 402 case 0x3: 403 /* System reset */ 404 ppc40x_system_reset(cpu); 405 break; 406 } 407 } 408 409 /* PowerPC 40x internal IRQ controller */ 410 static void ppc40x_set_irq(void *opaque, int pin, int level) 411 { 412 PowerPCCPU *cpu = opaque; 413 CPUPPCState *env = &cpu->env; 414 int cur_level; 415 416 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 417 env, pin, level); 418 cur_level = (env->irq_input_state >> pin) & 1; 419 /* Don't generate spurious events */ 420 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { 421 CPUState *cs = CPU(cpu); 422 423 switch (pin) { 424 case PPC40x_INPUT_RESET_SYS: 425 if (level) { 426 LOG_IRQ("%s: reset the PowerPC system\n", 427 __func__); 428 ppc40x_system_reset(cpu); 429 } 430 break; 431 case PPC40x_INPUT_RESET_CHIP: 432 if (level) { 433 LOG_IRQ("%s: reset the PowerPC chip\n", __func__); 434 ppc40x_chip_reset(cpu); 435 } 436 break; 437 case PPC40x_INPUT_RESET_CORE: 438 /* XXX: TODO: update DBSR[MRR] */ 439 if (level) { 440 LOG_IRQ("%s: reset the PowerPC core\n", __func__); 441 ppc40x_core_reset(cpu); 442 } 443 break; 444 case PPC40x_INPUT_CINT: 445 /* Level sensitive - active high */ 446 LOG_IRQ("%s: set the critical IRQ state to %d\n", 447 __func__, level); 448 ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level); 449 break; 450 case PPC40x_INPUT_INT: 451 /* Level sensitive - active high */ 452 LOG_IRQ("%s: set the external IRQ state to %d\n", 453 __func__, level); 454 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 455 break; 456 case PPC40x_INPUT_HALT: 457 /* Level sensitive - active low */ 458 if (level) { 459 LOG_IRQ("%s: stop the CPU\n", __func__); 460 cs->halted = 1; 461 } else { 462 LOG_IRQ("%s: restart the CPU\n", __func__); 463 cs->halted = 0; 464 qemu_cpu_kick(cs); 465 } 466 break; 467 case PPC40x_INPUT_DEBUG: 468 /* Level sensitive - active high */ 469 LOG_IRQ("%s: set the debug pin state to %d\n", 470 __func__, level); 471 ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level); 472 break; 473 default: 474 /* Unknown pin - do nothing */ 475 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 476 return; 477 } 478 if (level) 479 env->irq_input_state |= 1 << pin; 480 else 481 env->irq_input_state &= ~(1 << pin); 482 } 483 } 484 485 void ppc40x_irq_init(PowerPCCPU *cpu) 486 { 487 CPUPPCState *env = &cpu->env; 488 489 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq, 490 cpu, PPC40x_INPUT_NB); 491 } 492 493 /* PowerPC E500 internal IRQ controller */ 494 static void ppce500_set_irq(void *opaque, int pin, int level) 495 { 496 PowerPCCPU *cpu = opaque; 497 CPUPPCState *env = &cpu->env; 498 int cur_level; 499 500 LOG_IRQ("%s: env %p pin %d level %d\n", __func__, 501 env, pin, level); 502 cur_level = (env->irq_input_state >> pin) & 1; 503 /* Don't generate spurious events */ 504 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { 505 switch (pin) { 506 case PPCE500_INPUT_MCK: 507 if (level) { 508 LOG_IRQ("%s: reset the PowerPC system\n", 509 __func__); 510 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 511 } 512 break; 513 case PPCE500_INPUT_RESET_CORE: 514 if (level) { 515 LOG_IRQ("%s: reset the PowerPC core\n", __func__); 516 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, level); 517 } 518 break; 519 case PPCE500_INPUT_CINT: 520 /* Level sensitive - active high */ 521 LOG_IRQ("%s: set the critical IRQ state to %d\n", 522 __func__, level); 523 ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level); 524 break; 525 case PPCE500_INPUT_INT: 526 /* Level sensitive - active high */ 527 LOG_IRQ("%s: set the core IRQ state to %d\n", 528 __func__, level); 529 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); 530 break; 531 case PPCE500_INPUT_DEBUG: 532 /* Level sensitive - active high */ 533 LOG_IRQ("%s: set the debug pin state to %d\n", 534 __func__, level); 535 ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level); 536 break; 537 default: 538 /* Unknown pin - do nothing */ 539 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); 540 return; 541 } 542 if (level) 543 env->irq_input_state |= 1 << pin; 544 else 545 env->irq_input_state &= ~(1 << pin); 546 } 547 } 548 549 void ppce500_irq_init(PowerPCCPU *cpu) 550 { 551 CPUPPCState *env = &cpu->env; 552 553 env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq, 554 cpu, PPCE500_INPUT_NB); 555 } 556 557 /* Enable or Disable the E500 EPR capability */ 558 void ppce500_set_mpic_proxy(bool enabled) 559 { 560 CPUState *cs; 561 562 CPU_FOREACH(cs) { 563 PowerPCCPU *cpu = POWERPC_CPU(cs); 564 565 cpu->env.mpic_proxy = enabled; 566 if (kvm_enabled()) { 567 kvmppc_set_mpic_proxy(cpu, enabled); 568 } 569 } 570 } 571 572 /*****************************************************************************/ 573 /* PowerPC time base and decrementer emulation */ 574 575 uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk, int64_t tb_offset) 576 { 577 /* TB time in tb periods */ 578 return muldiv64(vmclk, tb_env->tb_freq, NANOSECONDS_PER_SECOND) + tb_offset; 579 } 580 581 uint64_t cpu_ppc_load_tbl (CPUPPCState *env) 582 { 583 ppc_tb_t *tb_env = env->tb_env; 584 uint64_t tb; 585 586 if (kvm_enabled()) { 587 return env->spr[SPR_TBL]; 588 } 589 590 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); 591 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); 592 593 return tb; 594 } 595 596 static inline uint32_t _cpu_ppc_load_tbu(CPUPPCState *env) 597 { 598 ppc_tb_t *tb_env = env->tb_env; 599 uint64_t tb; 600 601 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); 602 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); 603 604 return tb >> 32; 605 } 606 607 uint32_t cpu_ppc_load_tbu (CPUPPCState *env) 608 { 609 if (kvm_enabled()) { 610 return env->spr[SPR_TBU]; 611 } 612 613 return _cpu_ppc_load_tbu(env); 614 } 615 616 static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk, 617 int64_t *tb_offsetp, uint64_t value) 618 { 619 *tb_offsetp = value - 620 muldiv64(vmclk, tb_env->tb_freq, NANOSECONDS_PER_SECOND); 621 622 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n", 623 __func__, value, *tb_offsetp); 624 } 625 626 void cpu_ppc_store_tbl (CPUPPCState *env, uint32_t value) 627 { 628 ppc_tb_t *tb_env = env->tb_env; 629 uint64_t tb; 630 631 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); 632 tb &= 0xFFFFFFFF00000000ULL; 633 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 634 &tb_env->tb_offset, tb | (uint64_t)value); 635 } 636 637 static inline void _cpu_ppc_store_tbu(CPUPPCState *env, uint32_t value) 638 { 639 ppc_tb_t *tb_env = env->tb_env; 640 uint64_t tb; 641 642 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); 643 tb &= 0x00000000FFFFFFFFULL; 644 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 645 &tb_env->tb_offset, ((uint64_t)value << 32) | tb); 646 } 647 648 void cpu_ppc_store_tbu (CPUPPCState *env, uint32_t value) 649 { 650 _cpu_ppc_store_tbu(env, value); 651 } 652 653 uint64_t cpu_ppc_load_atbl (CPUPPCState *env) 654 { 655 ppc_tb_t *tb_env = env->tb_env; 656 uint64_t tb; 657 658 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); 659 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); 660 661 return tb; 662 } 663 664 uint32_t cpu_ppc_load_atbu (CPUPPCState *env) 665 { 666 ppc_tb_t *tb_env = env->tb_env; 667 uint64_t tb; 668 669 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); 670 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); 671 672 return tb >> 32; 673 } 674 675 void cpu_ppc_store_atbl (CPUPPCState *env, uint32_t value) 676 { 677 ppc_tb_t *tb_env = env->tb_env; 678 uint64_t tb; 679 680 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); 681 tb &= 0xFFFFFFFF00000000ULL; 682 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 683 &tb_env->atb_offset, tb | (uint64_t)value); 684 } 685 686 void cpu_ppc_store_atbu (CPUPPCState *env, uint32_t value) 687 { 688 ppc_tb_t *tb_env = env->tb_env; 689 uint64_t tb; 690 691 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); 692 tb &= 0x00000000FFFFFFFFULL; 693 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 694 &tb_env->atb_offset, ((uint64_t)value << 32) | tb); 695 } 696 697 static void cpu_ppc_tb_stop (CPUPPCState *env) 698 { 699 ppc_tb_t *tb_env = env->tb_env; 700 uint64_t tb, atb, vmclk; 701 702 /* If the time base is already frozen, do nothing */ 703 if (tb_env->tb_freq != 0) { 704 vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 705 /* Get the time base */ 706 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset); 707 /* Get the alternate time base */ 708 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset); 709 /* Store the time base value (ie compute the current offset) */ 710 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); 711 /* Store the alternate time base value (compute the current offset) */ 712 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); 713 /* Set the time base frequency to zero */ 714 tb_env->tb_freq = 0; 715 /* Now, the time bases are frozen to tb_offset / atb_offset value */ 716 } 717 } 718 719 static void cpu_ppc_tb_start (CPUPPCState *env) 720 { 721 ppc_tb_t *tb_env = env->tb_env; 722 uint64_t tb, atb, vmclk; 723 724 /* If the time base is not frozen, do nothing */ 725 if (tb_env->tb_freq == 0) { 726 vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 727 /* Get the time base from tb_offset */ 728 tb = tb_env->tb_offset; 729 /* Get the alternate time base from atb_offset */ 730 atb = tb_env->atb_offset; 731 /* Restore the tb frequency from the decrementer frequency */ 732 tb_env->tb_freq = tb_env->decr_freq; 733 /* Store the time base value */ 734 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); 735 /* Store the alternate time base value */ 736 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); 737 } 738 } 739 740 bool ppc_decr_clear_on_delivery(CPUPPCState *env) 741 { 742 ppc_tb_t *tb_env = env->tb_env; 743 int flags = PPC_DECR_UNDERFLOW_TRIGGERED | PPC_DECR_UNDERFLOW_LEVEL; 744 return ((tb_env->flags & flags) == PPC_DECR_UNDERFLOW_TRIGGERED); 745 } 746 747 static inline int64_t _cpu_ppc_load_decr(CPUPPCState *env, uint64_t next) 748 { 749 ppc_tb_t *tb_env = env->tb_env; 750 int64_t decr, diff; 751 752 diff = next - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 753 if (diff >= 0) { 754 decr = muldiv64(diff, tb_env->decr_freq, NANOSECONDS_PER_SECOND); 755 } else if (tb_env->flags & PPC_TIMER_BOOKE) { 756 decr = 0; 757 } else { 758 decr = -muldiv64(-diff, tb_env->decr_freq, NANOSECONDS_PER_SECOND); 759 } 760 LOG_TB("%s: %016" PRIx64 "\n", __func__, decr); 761 762 return decr; 763 } 764 765 target_ulong cpu_ppc_load_decr(CPUPPCState *env) 766 { 767 ppc_tb_t *tb_env = env->tb_env; 768 uint64_t decr; 769 770 if (kvm_enabled()) { 771 return env->spr[SPR_DECR]; 772 } 773 774 decr = _cpu_ppc_load_decr(env, tb_env->decr_next); 775 776 /* 777 * If large decrementer is enabled then the decrementer is signed extened 778 * to 64 bits, otherwise it is a 32 bit value. 779 */ 780 if (env->spr[SPR_LPCR] & LPCR_LD) { 781 return decr; 782 } 783 return (uint32_t) decr; 784 } 785 786 target_ulong cpu_ppc_load_hdecr(CPUPPCState *env) 787 { 788 PowerPCCPU *cpu = ppc_env_get_cpu(env); 789 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 790 ppc_tb_t *tb_env = env->tb_env; 791 uint64_t hdecr; 792 793 hdecr = _cpu_ppc_load_decr(env, tb_env->hdecr_next); 794 795 /* 796 * If we have a large decrementer (POWER9 or later) then hdecr is sign 797 * extended to 64 bits, otherwise it is 32 bits. 798 */ 799 if (pcc->lrg_decr_bits > 32) { 800 return hdecr; 801 } 802 return (uint32_t) hdecr; 803 } 804 805 uint64_t cpu_ppc_load_purr (CPUPPCState *env) 806 { 807 ppc_tb_t *tb_env = env->tb_env; 808 uint64_t diff; 809 810 diff = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - tb_env->purr_start; 811 812 return tb_env->purr_load + 813 muldiv64(diff, tb_env->tb_freq, NANOSECONDS_PER_SECOND); 814 } 815 816 /* When decrementer expires, 817 * all we need to do is generate or queue a CPU exception 818 */ 819 static inline void cpu_ppc_decr_excp(PowerPCCPU *cpu) 820 { 821 /* Raise it */ 822 LOG_TB("raise decrementer exception\n"); 823 ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 1); 824 } 825 826 static inline void cpu_ppc_decr_lower(PowerPCCPU *cpu) 827 { 828 ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 0); 829 } 830 831 static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu) 832 { 833 CPUPPCState *env = &cpu->env; 834 835 /* Raise it */ 836 LOG_TB("raise hv decrementer exception\n"); 837 838 /* The architecture specifies that we don't deliver HDEC 839 * interrupts in a PM state. Not only they don't cause a 840 * wakeup but they also get effectively discarded. 841 */ 842 if (!env->resume_as_sreset) { 843 ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1); 844 } 845 } 846 847 static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu) 848 { 849 ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 0); 850 } 851 852 static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp, 853 QEMUTimer *timer, 854 void (*raise_excp)(void *), 855 void (*lower_excp)(PowerPCCPU *), 856 target_ulong decr, target_ulong value, 857 int nr_bits) 858 { 859 CPUPPCState *env = &cpu->env; 860 ppc_tb_t *tb_env = env->tb_env; 861 uint64_t now, next; 862 bool negative; 863 864 /* Truncate value to decr_width and sign extend for simplicity */ 865 value &= ((1ULL << nr_bits) - 1); 866 negative = !!(value & (1ULL << (nr_bits - 1))); 867 if (negative) { 868 value |= (0xFFFFFFFFULL << nr_bits); 869 } 870 871 LOG_TB("%s: " TARGET_FMT_lx " => " TARGET_FMT_lx "\n", __func__, 872 decr, value); 873 874 if (kvm_enabled()) { 875 /* KVM handles decrementer exceptions, we don't need our own timer */ 876 return; 877 } 878 879 /* 880 * Going from 2 -> 1, 1 -> 0 or 0 -> -1 is the event to generate a DEC 881 * interrupt. 882 * 883 * If we get a really small DEC value, we can assume that by the time we 884 * handled it we should inject an interrupt already. 885 * 886 * On MSB level based DEC implementations the MSB always means the interrupt 887 * is pending, so raise it on those. 888 * 889 * On MSB edge based DEC implementations the MSB going from 0 -> 1 triggers 890 * an edge interrupt, so raise it here too. 891 */ 892 if ((value < 3) || 893 ((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && negative) || 894 ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && negative 895 && !(decr & (1ULL << (nr_bits - 1))))) { 896 (*raise_excp)(cpu); 897 return; 898 } 899 900 /* On MSB level based systems a 0 for the MSB stops interrupt delivery */ 901 if (!negative && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL)) { 902 (*lower_excp)(cpu); 903 } 904 905 /* Calculate the next timer event */ 906 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 907 next = now + muldiv64(value, NANOSECONDS_PER_SECOND, tb_env->decr_freq); 908 *nextp = next; 909 910 /* Adjust timer */ 911 timer_mod(timer, next); 912 } 913 914 static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, target_ulong decr, 915 target_ulong value, int nr_bits) 916 { 917 ppc_tb_t *tb_env = cpu->env.tb_env; 918 919 __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer, 920 tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr, 921 value, nr_bits); 922 } 923 924 void cpu_ppc_store_decr(CPUPPCState *env, target_ulong value) 925 { 926 PowerPCCPU *cpu = ppc_env_get_cpu(env); 927 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 928 int nr_bits = 32; 929 930 if (env->spr[SPR_LPCR] & LPCR_LD) { 931 nr_bits = pcc->lrg_decr_bits; 932 } 933 934 _cpu_ppc_store_decr(cpu, cpu_ppc_load_decr(env), value, nr_bits); 935 } 936 937 static void cpu_ppc_decr_cb(void *opaque) 938 { 939 PowerPCCPU *cpu = opaque; 940 941 cpu_ppc_decr_excp(cpu); 942 } 943 944 static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, target_ulong hdecr, 945 target_ulong value, int nr_bits) 946 { 947 ppc_tb_t *tb_env = cpu->env.tb_env; 948 949 if (tb_env->hdecr_timer != NULL) { 950 __cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer, 951 tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower, 952 hdecr, value, nr_bits); 953 } 954 } 955 956 void cpu_ppc_store_hdecr(CPUPPCState *env, target_ulong value) 957 { 958 PowerPCCPU *cpu = ppc_env_get_cpu(env); 959 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); 960 961 _cpu_ppc_store_hdecr(cpu, cpu_ppc_load_hdecr(env), value, 962 pcc->lrg_decr_bits); 963 } 964 965 static void cpu_ppc_hdecr_cb(void *opaque) 966 { 967 PowerPCCPU *cpu = opaque; 968 969 cpu_ppc_hdecr_excp(cpu); 970 } 971 972 static void cpu_ppc_store_purr(PowerPCCPU *cpu, uint64_t value) 973 { 974 ppc_tb_t *tb_env = cpu->env.tb_env; 975 976 tb_env->purr_load = value; 977 tb_env->purr_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 978 } 979 980 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq) 981 { 982 CPUPPCState *env = opaque; 983 PowerPCCPU *cpu = ppc_env_get_cpu(env); 984 ppc_tb_t *tb_env = env->tb_env; 985 986 tb_env->tb_freq = freq; 987 tb_env->decr_freq = freq; 988 /* There is a bug in Linux 2.4 kernels: 989 * if a decrementer exception is pending when it enables msr_ee at startup, 990 * it's not ready to handle it... 991 */ 992 _cpu_ppc_store_decr(cpu, 0xFFFFFFFF, 0xFFFFFFFF, 32); 993 _cpu_ppc_store_hdecr(cpu, 0xFFFFFFFF, 0xFFFFFFFF, 32); 994 cpu_ppc_store_purr(cpu, 0x0000000000000000ULL); 995 } 996 997 static void timebase_save(PPCTimebase *tb) 998 { 999 uint64_t ticks = cpu_get_host_ticks(); 1000 PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); 1001 1002 if (!first_ppc_cpu->env.tb_env) { 1003 error_report("No timebase object"); 1004 return; 1005 } 1006 1007 /* not used anymore, we keep it for compatibility */ 1008 tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST); 1009 /* 1010 * tb_offset is only expected to be changed by QEMU so 1011 * there is no need to update it from KVM here 1012 */ 1013 tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset; 1014 } 1015 1016 static void timebase_load(PPCTimebase *tb) 1017 { 1018 CPUState *cpu; 1019 PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); 1020 int64_t tb_off_adj, tb_off; 1021 unsigned long freq; 1022 1023 if (!first_ppc_cpu->env.tb_env) { 1024 error_report("No timebase object"); 1025 return; 1026 } 1027 1028 freq = first_ppc_cpu->env.tb_env->tb_freq; 1029 1030 tb_off_adj = tb->guest_timebase - cpu_get_host_ticks(); 1031 1032 tb_off = first_ppc_cpu->env.tb_env->tb_offset; 1033 trace_ppc_tb_adjust(tb_off, tb_off_adj, tb_off_adj - tb_off, 1034 (tb_off_adj - tb_off) / freq); 1035 1036 /* Set new offset to all CPUs */ 1037 CPU_FOREACH(cpu) { 1038 PowerPCCPU *pcpu = POWERPC_CPU(cpu); 1039 pcpu->env.tb_env->tb_offset = tb_off_adj; 1040 #if defined(CONFIG_KVM) 1041 kvm_set_one_reg(cpu, KVM_REG_PPC_TB_OFFSET, 1042 &pcpu->env.tb_env->tb_offset); 1043 #endif 1044 } 1045 } 1046 1047 void cpu_ppc_clock_vm_state_change(void *opaque, int running, 1048 RunState state) 1049 { 1050 PPCTimebase *tb = opaque; 1051 1052 if (running) { 1053 timebase_load(tb); 1054 } else { 1055 timebase_save(tb); 1056 } 1057 } 1058 1059 /* 1060 * When migrating, read the clock just before migration, 1061 * so that the guest clock counts during the events 1062 * between: 1063 * 1064 * * vm_stop() 1065 * * 1066 * * pre_save() 1067 * 1068 * This reduces clock difference on migration from 5s 1069 * to 0.1s (when max_downtime == 5s), because sending the 1070 * final pages of memory (which happens between vm_stop() 1071 * and pre_save()) takes max_downtime. 1072 */ 1073 static int timebase_pre_save(void *opaque) 1074 { 1075 PPCTimebase *tb = opaque; 1076 1077 timebase_save(tb); 1078 1079 return 0; 1080 } 1081 1082 const VMStateDescription vmstate_ppc_timebase = { 1083 .name = "timebase", 1084 .version_id = 1, 1085 .minimum_version_id = 1, 1086 .minimum_version_id_old = 1, 1087 .pre_save = timebase_pre_save, 1088 .fields = (VMStateField []) { 1089 VMSTATE_UINT64(guest_timebase, PPCTimebase), 1090 VMSTATE_INT64(time_of_the_day_ns, PPCTimebase), 1091 VMSTATE_END_OF_LIST() 1092 }, 1093 }; 1094 1095 /* Set up (once) timebase frequency (in Hz) */ 1096 clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq) 1097 { 1098 PowerPCCPU *cpu = ppc_env_get_cpu(env); 1099 ppc_tb_t *tb_env; 1100 1101 tb_env = g_malloc0(sizeof(ppc_tb_t)); 1102 env->tb_env = tb_env; 1103 tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED; 1104 if (env->insns_flags & PPC_SEGMENT_64B) { 1105 /* All Book3S 64bit CPUs implement level based DEC logic */ 1106 tb_env->flags |= PPC_DECR_UNDERFLOW_LEVEL; 1107 } 1108 /* Create new timer */ 1109 tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu); 1110 if (env->has_hv_mode) { 1111 tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb, 1112 cpu); 1113 } else { 1114 tb_env->hdecr_timer = NULL; 1115 } 1116 cpu_ppc_set_tb_clk(env, freq); 1117 1118 return &cpu_ppc_set_tb_clk; 1119 } 1120 1121 /* Specific helpers for POWER & PowerPC 601 RTC */ 1122 void cpu_ppc601_store_rtcu (CPUPPCState *env, uint32_t value) 1123 { 1124 _cpu_ppc_store_tbu(env, value); 1125 } 1126 1127 uint32_t cpu_ppc601_load_rtcu (CPUPPCState *env) 1128 { 1129 return _cpu_ppc_load_tbu(env); 1130 } 1131 1132 void cpu_ppc601_store_rtcl (CPUPPCState *env, uint32_t value) 1133 { 1134 cpu_ppc_store_tbl(env, value & 0x3FFFFF80); 1135 } 1136 1137 uint32_t cpu_ppc601_load_rtcl (CPUPPCState *env) 1138 { 1139 return cpu_ppc_load_tbl(env) & 0x3FFFFF80; 1140 } 1141 1142 /*****************************************************************************/ 1143 /* PowerPC 40x timers */ 1144 1145 /* PIT, FIT & WDT */ 1146 typedef struct ppc40x_timer_t ppc40x_timer_t; 1147 struct ppc40x_timer_t { 1148 uint64_t pit_reload; /* PIT auto-reload value */ 1149 uint64_t fit_next; /* Tick for next FIT interrupt */ 1150 QEMUTimer *fit_timer; 1151 uint64_t wdt_next; /* Tick for next WDT interrupt */ 1152 QEMUTimer *wdt_timer; 1153 1154 /* 405 have the PIT, 440 have a DECR. */ 1155 unsigned int decr_excp; 1156 }; 1157 1158 /* Fixed interval timer */ 1159 static void cpu_4xx_fit_cb (void *opaque) 1160 { 1161 PowerPCCPU *cpu; 1162 CPUPPCState *env; 1163 ppc_tb_t *tb_env; 1164 ppc40x_timer_t *ppc40x_timer; 1165 uint64_t now, next; 1166 1167 env = opaque; 1168 cpu = ppc_env_get_cpu(env); 1169 tb_env = env->tb_env; 1170 ppc40x_timer = tb_env->opaque; 1171 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 1172 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) { 1173 case 0: 1174 next = 1 << 9; 1175 break; 1176 case 1: 1177 next = 1 << 13; 1178 break; 1179 case 2: 1180 next = 1 << 17; 1181 break; 1182 case 3: 1183 next = 1 << 21; 1184 break; 1185 default: 1186 /* Cannot occur, but makes gcc happy */ 1187 return; 1188 } 1189 next = now + muldiv64(next, NANOSECONDS_PER_SECOND, tb_env->tb_freq); 1190 if (next == now) 1191 next++; 1192 timer_mod(ppc40x_timer->fit_timer, next); 1193 env->spr[SPR_40x_TSR] |= 1 << 26; 1194 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) { 1195 ppc_set_irq(cpu, PPC_INTERRUPT_FIT, 1); 1196 } 1197 LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, 1198 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1), 1199 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); 1200 } 1201 1202 /* Programmable interval timer */ 1203 static void start_stop_pit (CPUPPCState *env, ppc_tb_t *tb_env, int is_excp) 1204 { 1205 ppc40x_timer_t *ppc40x_timer; 1206 uint64_t now, next; 1207 1208 ppc40x_timer = tb_env->opaque; 1209 if (ppc40x_timer->pit_reload <= 1 || 1210 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) || 1211 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) { 1212 /* Stop PIT */ 1213 LOG_TB("%s: stop PIT\n", __func__); 1214 timer_del(tb_env->decr_timer); 1215 } else { 1216 LOG_TB("%s: start PIT %016" PRIx64 "\n", 1217 __func__, ppc40x_timer->pit_reload); 1218 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 1219 next = now + muldiv64(ppc40x_timer->pit_reload, 1220 NANOSECONDS_PER_SECOND, tb_env->decr_freq); 1221 if (is_excp) 1222 next += tb_env->decr_next - now; 1223 if (next == now) 1224 next++; 1225 timer_mod(tb_env->decr_timer, next); 1226 tb_env->decr_next = next; 1227 } 1228 } 1229 1230 static void cpu_4xx_pit_cb (void *opaque) 1231 { 1232 PowerPCCPU *cpu; 1233 CPUPPCState *env; 1234 ppc_tb_t *tb_env; 1235 ppc40x_timer_t *ppc40x_timer; 1236 1237 env = opaque; 1238 cpu = ppc_env_get_cpu(env); 1239 tb_env = env->tb_env; 1240 ppc40x_timer = tb_env->opaque; 1241 env->spr[SPR_40x_TSR] |= 1 << 27; 1242 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) { 1243 ppc_set_irq(cpu, ppc40x_timer->decr_excp, 1); 1244 } 1245 start_stop_pit(env, tb_env, 1); 1246 LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " " 1247 "%016" PRIx64 "\n", __func__, 1248 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1), 1249 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1), 1250 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR], 1251 ppc40x_timer->pit_reload); 1252 } 1253 1254 /* Watchdog timer */ 1255 static void cpu_4xx_wdt_cb (void *opaque) 1256 { 1257 PowerPCCPU *cpu; 1258 CPUPPCState *env; 1259 ppc_tb_t *tb_env; 1260 ppc40x_timer_t *ppc40x_timer; 1261 uint64_t now, next; 1262 1263 env = opaque; 1264 cpu = ppc_env_get_cpu(env); 1265 tb_env = env->tb_env; 1266 ppc40x_timer = tb_env->opaque; 1267 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 1268 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) { 1269 case 0: 1270 next = 1 << 17; 1271 break; 1272 case 1: 1273 next = 1 << 21; 1274 break; 1275 case 2: 1276 next = 1 << 25; 1277 break; 1278 case 3: 1279 next = 1 << 29; 1280 break; 1281 default: 1282 /* Cannot occur, but makes gcc happy */ 1283 return; 1284 } 1285 next = now + muldiv64(next, NANOSECONDS_PER_SECOND, tb_env->decr_freq); 1286 if (next == now) 1287 next++; 1288 LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, 1289 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); 1290 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) { 1291 case 0x0: 1292 case 0x1: 1293 timer_mod(ppc40x_timer->wdt_timer, next); 1294 ppc40x_timer->wdt_next = next; 1295 env->spr[SPR_40x_TSR] |= 1U << 31; 1296 break; 1297 case 0x2: 1298 timer_mod(ppc40x_timer->wdt_timer, next); 1299 ppc40x_timer->wdt_next = next; 1300 env->spr[SPR_40x_TSR] |= 1 << 30; 1301 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) { 1302 ppc_set_irq(cpu, PPC_INTERRUPT_WDT, 1); 1303 } 1304 break; 1305 case 0x3: 1306 env->spr[SPR_40x_TSR] &= ~0x30000000; 1307 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000; 1308 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) { 1309 case 0x0: 1310 /* No reset */ 1311 break; 1312 case 0x1: /* Core reset */ 1313 ppc40x_core_reset(cpu); 1314 break; 1315 case 0x2: /* Chip reset */ 1316 ppc40x_chip_reset(cpu); 1317 break; 1318 case 0x3: /* System reset */ 1319 ppc40x_system_reset(cpu); 1320 break; 1321 } 1322 } 1323 } 1324 1325 void store_40x_pit (CPUPPCState *env, target_ulong val) 1326 { 1327 ppc_tb_t *tb_env; 1328 ppc40x_timer_t *ppc40x_timer; 1329 1330 tb_env = env->tb_env; 1331 ppc40x_timer = tb_env->opaque; 1332 LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val); 1333 ppc40x_timer->pit_reload = val; 1334 start_stop_pit(env, tb_env, 0); 1335 } 1336 1337 target_ulong load_40x_pit (CPUPPCState *env) 1338 { 1339 return cpu_ppc_load_decr(env); 1340 } 1341 1342 static void ppc_40x_set_tb_clk (void *opaque, uint32_t freq) 1343 { 1344 CPUPPCState *env = opaque; 1345 ppc_tb_t *tb_env = env->tb_env; 1346 1347 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__, 1348 freq); 1349 tb_env->tb_freq = freq; 1350 tb_env->decr_freq = freq; 1351 /* XXX: we should also update all timers */ 1352 } 1353 1354 clk_setup_cb ppc_40x_timers_init (CPUPPCState *env, uint32_t freq, 1355 unsigned int decr_excp) 1356 { 1357 ppc_tb_t *tb_env; 1358 ppc40x_timer_t *ppc40x_timer; 1359 1360 tb_env = g_malloc0(sizeof(ppc_tb_t)); 1361 env->tb_env = tb_env; 1362 tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED; 1363 ppc40x_timer = g_malloc0(sizeof(ppc40x_timer_t)); 1364 tb_env->tb_freq = freq; 1365 tb_env->decr_freq = freq; 1366 tb_env->opaque = ppc40x_timer; 1367 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq); 1368 if (ppc40x_timer != NULL) { 1369 /* We use decr timer for PIT */ 1370 tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_pit_cb, env); 1371 ppc40x_timer->fit_timer = 1372 timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_fit_cb, env); 1373 ppc40x_timer->wdt_timer = 1374 timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_wdt_cb, env); 1375 ppc40x_timer->decr_excp = decr_excp; 1376 } 1377 1378 return &ppc_40x_set_tb_clk; 1379 } 1380 1381 /*****************************************************************************/ 1382 /* Embedded PowerPC Device Control Registers */ 1383 typedef struct ppc_dcrn_t ppc_dcrn_t; 1384 struct ppc_dcrn_t { 1385 dcr_read_cb dcr_read; 1386 dcr_write_cb dcr_write; 1387 void *opaque; 1388 }; 1389 1390 /* XXX: on 460, DCR addresses are 32 bits wide, 1391 * using DCRIPR to get the 22 upper bits of the DCR address 1392 */ 1393 #define DCRN_NB 1024 1394 struct ppc_dcr_t { 1395 ppc_dcrn_t dcrn[DCRN_NB]; 1396 int (*read_error)(int dcrn); 1397 int (*write_error)(int dcrn); 1398 }; 1399 1400 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) 1401 { 1402 ppc_dcrn_t *dcr; 1403 1404 if (dcrn < 0 || dcrn >= DCRN_NB) 1405 goto error; 1406 dcr = &dcr_env->dcrn[dcrn]; 1407 if (dcr->dcr_read == NULL) 1408 goto error; 1409 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn); 1410 1411 return 0; 1412 1413 error: 1414 if (dcr_env->read_error != NULL) 1415 return (*dcr_env->read_error)(dcrn); 1416 1417 return -1; 1418 } 1419 1420 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) 1421 { 1422 ppc_dcrn_t *dcr; 1423 1424 if (dcrn < 0 || dcrn >= DCRN_NB) 1425 goto error; 1426 dcr = &dcr_env->dcrn[dcrn]; 1427 if (dcr->dcr_write == NULL) 1428 goto error; 1429 (*dcr->dcr_write)(dcr->opaque, dcrn, val); 1430 1431 return 0; 1432 1433 error: 1434 if (dcr_env->write_error != NULL) 1435 return (*dcr_env->write_error)(dcrn); 1436 1437 return -1; 1438 } 1439 1440 int ppc_dcr_register (CPUPPCState *env, int dcrn, void *opaque, 1441 dcr_read_cb dcr_read, dcr_write_cb dcr_write) 1442 { 1443 ppc_dcr_t *dcr_env; 1444 ppc_dcrn_t *dcr; 1445 1446 dcr_env = env->dcr_env; 1447 if (dcr_env == NULL) 1448 return -1; 1449 if (dcrn < 0 || dcrn >= DCRN_NB) 1450 return -1; 1451 dcr = &dcr_env->dcrn[dcrn]; 1452 if (dcr->opaque != NULL || 1453 dcr->dcr_read != NULL || 1454 dcr->dcr_write != NULL) 1455 return -1; 1456 dcr->opaque = opaque; 1457 dcr->dcr_read = dcr_read; 1458 dcr->dcr_write = dcr_write; 1459 1460 return 0; 1461 } 1462 1463 int ppc_dcr_init (CPUPPCState *env, int (*read_error)(int dcrn), 1464 int (*write_error)(int dcrn)) 1465 { 1466 ppc_dcr_t *dcr_env; 1467 1468 dcr_env = g_malloc0(sizeof(ppc_dcr_t)); 1469 dcr_env->read_error = read_error; 1470 dcr_env->write_error = write_error; 1471 env->dcr_env = dcr_env; 1472 1473 return 0; 1474 } 1475 1476 /*****************************************************************************/ 1477 /* Debug port */ 1478 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val) 1479 { 1480 addr &= 0xF; 1481 switch (addr) { 1482 case 0: 1483 printf("%c", val); 1484 break; 1485 case 1: 1486 printf("\n"); 1487 fflush(stdout); 1488 break; 1489 case 2: 1490 printf("Set loglevel to %04" PRIx32 "\n", val); 1491 qemu_set_log(val | 0x100); 1492 break; 1493 } 1494 } 1495 1496 PowerPCCPU *ppc_get_vcpu_by_pir(int pir) 1497 { 1498 CPUState *cs; 1499 1500 CPU_FOREACH(cs) { 1501 PowerPCCPU *cpu = POWERPC_CPU(cs); 1502 CPUPPCState *env = &cpu->env; 1503 1504 if (env->spr_cb[SPR_PIR].default_value == pir) { 1505 return cpu; 1506 } 1507 } 1508 1509 return NULL; 1510 } 1511