1 /* 2 * DEC 21272 (TSUNAMI/TYPHOON) chipset emulation. 3 * 4 * Written by Richard Henderson. 5 * 6 * This work is licensed under the GNU GPL license version 2 or later. 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qapi/error.h" 11 #include "cpu.h" 12 #include "hw/hw.h" 13 #include "hw/devices.h" 14 #include "sysemu/sysemu.h" 15 #include "alpha_sys.h" 16 #include "exec/address-spaces.h" 17 18 19 #define TYPE_TYPHOON_PCI_HOST_BRIDGE "typhoon-pcihost" 20 #define TYPE_TYPHOON_IOMMU_MEMORY_REGION "typhoon-iommu-memory-region" 21 22 typedef struct TyphoonCchip { 23 MemoryRegion region; 24 uint64_t misc; 25 uint64_t drir; 26 uint64_t dim[4]; 27 uint32_t iic[4]; 28 AlphaCPU *cpu[4]; 29 } TyphoonCchip; 30 31 typedef struct TyphoonWindow { 32 uint64_t wba; 33 uint64_t wsm; 34 uint64_t tba; 35 } TyphoonWindow; 36 37 typedef struct TyphoonPchip { 38 MemoryRegion region; 39 MemoryRegion reg_iack; 40 MemoryRegion reg_mem; 41 MemoryRegion reg_io; 42 MemoryRegion reg_conf; 43 44 AddressSpace iommu_as; 45 IOMMUMemoryRegion iommu; 46 47 uint64_t ctl; 48 TyphoonWindow win[4]; 49 } TyphoonPchip; 50 51 #define TYPHOON_PCI_HOST_BRIDGE(obj) \ 52 OBJECT_CHECK(TyphoonState, (obj), TYPE_TYPHOON_PCI_HOST_BRIDGE) 53 54 typedef struct TyphoonState { 55 PCIHostState parent_obj; 56 57 TyphoonCchip cchip; 58 TyphoonPchip pchip; 59 MemoryRegion dchip_region; 60 MemoryRegion ram_region; 61 } TyphoonState; 62 63 /* Called when one of DRIR or DIM changes. */ 64 static void cpu_irq_change(AlphaCPU *cpu, uint64_t req) 65 { 66 /* If there are any non-masked interrupts, tell the cpu. */ 67 if (cpu != NULL) { 68 CPUState *cs = CPU(cpu); 69 if (req) { 70 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 71 } else { 72 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 73 } 74 } 75 } 76 77 static uint64_t cchip_read(void *opaque, hwaddr addr, unsigned size) 78 { 79 CPUState *cpu = current_cpu; 80 TyphoonState *s = opaque; 81 uint64_t ret = 0; 82 83 switch (addr) { 84 case 0x0000: 85 /* CSC: Cchip System Configuration Register. */ 86 /* All sorts of data here; probably the only thing relevant is 87 PIP<14> Pchip 1 Present = 0. */ 88 break; 89 90 case 0x0040: 91 /* MTR: Memory Timing Register. */ 92 /* All sorts of stuff related to real DRAM. */ 93 break; 94 95 case 0x0080: 96 /* MISC: Miscellaneous Register. */ 97 ret = s->cchip.misc | (cpu->cpu_index & 3); 98 break; 99 100 case 0x00c0: 101 /* MPD: Memory Presence Detect Register. */ 102 break; 103 104 case 0x0100: /* AAR0 */ 105 case 0x0140: /* AAR1 */ 106 case 0x0180: /* AAR2 */ 107 case 0x01c0: /* AAR3 */ 108 /* AAR: Array Address Register. */ 109 /* All sorts of information about DRAM. */ 110 break; 111 112 case 0x0200: 113 /* DIM0: Device Interrupt Mask Register, CPU0. */ 114 ret = s->cchip.dim[0]; 115 break; 116 case 0x0240: 117 /* DIM1: Device Interrupt Mask Register, CPU1. */ 118 ret = s->cchip.dim[1]; 119 break; 120 case 0x0280: 121 /* DIR0: Device Interrupt Request Register, CPU0. */ 122 ret = s->cchip.dim[0] & s->cchip.drir; 123 break; 124 case 0x02c0: 125 /* DIR1: Device Interrupt Request Register, CPU1. */ 126 ret = s->cchip.dim[1] & s->cchip.drir; 127 break; 128 case 0x0300: 129 /* DRIR: Device Raw Interrupt Request Register. */ 130 ret = s->cchip.drir; 131 break; 132 133 case 0x0340: 134 /* PRBEN: Probe Enable Register. */ 135 break; 136 137 case 0x0380: 138 /* IIC0: Interval Ignore Count Register, CPU0. */ 139 ret = s->cchip.iic[0]; 140 break; 141 case 0x03c0: 142 /* IIC1: Interval Ignore Count Register, CPU1. */ 143 ret = s->cchip.iic[1]; 144 break; 145 146 case 0x0400: /* MPR0 */ 147 case 0x0440: /* MPR1 */ 148 case 0x0480: /* MPR2 */ 149 case 0x04c0: /* MPR3 */ 150 /* MPR: Memory Programming Register. */ 151 break; 152 153 case 0x0580: 154 /* TTR: TIGbus Timing Register. */ 155 /* All sorts of stuff related to interrupt delivery timings. */ 156 break; 157 case 0x05c0: 158 /* TDR: TIGbug Device Timing Register. */ 159 break; 160 161 case 0x0600: 162 /* DIM2: Device Interrupt Mask Register, CPU2. */ 163 ret = s->cchip.dim[2]; 164 break; 165 case 0x0640: 166 /* DIM3: Device Interrupt Mask Register, CPU3. */ 167 ret = s->cchip.dim[3]; 168 break; 169 case 0x0680: 170 /* DIR2: Device Interrupt Request Register, CPU2. */ 171 ret = s->cchip.dim[2] & s->cchip.drir; 172 break; 173 case 0x06c0: 174 /* DIR3: Device Interrupt Request Register, CPU3. */ 175 ret = s->cchip.dim[3] & s->cchip.drir; 176 break; 177 178 case 0x0700: 179 /* IIC2: Interval Ignore Count Register, CPU2. */ 180 ret = s->cchip.iic[2]; 181 break; 182 case 0x0740: 183 /* IIC3: Interval Ignore Count Register, CPU3. */ 184 ret = s->cchip.iic[3]; 185 break; 186 187 case 0x0780: 188 /* PWR: Power Management Control. */ 189 break; 190 191 case 0x0c00: /* CMONCTLA */ 192 case 0x0c40: /* CMONCTLB */ 193 case 0x0c80: /* CMONCNT01 */ 194 case 0x0cc0: /* CMONCNT23 */ 195 break; 196 197 default: 198 cpu_unassigned_access(cpu, addr, false, false, 0, size); 199 return -1; 200 } 201 202 return ret; 203 } 204 205 static uint64_t dchip_read(void *opaque, hwaddr addr, unsigned size) 206 { 207 /* Skip this. It's all related to DRAM timing and setup. */ 208 return 0; 209 } 210 211 static uint64_t pchip_read(void *opaque, hwaddr addr, unsigned size) 212 { 213 TyphoonState *s = opaque; 214 uint64_t ret = 0; 215 216 switch (addr) { 217 case 0x0000: 218 /* WSBA0: Window Space Base Address Register. */ 219 ret = s->pchip.win[0].wba; 220 break; 221 case 0x0040: 222 /* WSBA1 */ 223 ret = s->pchip.win[1].wba; 224 break; 225 case 0x0080: 226 /* WSBA2 */ 227 ret = s->pchip.win[2].wba; 228 break; 229 case 0x00c0: 230 /* WSBA3 */ 231 ret = s->pchip.win[3].wba; 232 break; 233 234 case 0x0100: 235 /* WSM0: Window Space Mask Register. */ 236 ret = s->pchip.win[0].wsm; 237 break; 238 case 0x0140: 239 /* WSM1 */ 240 ret = s->pchip.win[1].wsm; 241 break; 242 case 0x0180: 243 /* WSM2 */ 244 ret = s->pchip.win[2].wsm; 245 break; 246 case 0x01c0: 247 /* WSM3 */ 248 ret = s->pchip.win[3].wsm; 249 break; 250 251 case 0x0200: 252 /* TBA0: Translated Base Address Register. */ 253 ret = s->pchip.win[0].tba; 254 break; 255 case 0x0240: 256 /* TBA1 */ 257 ret = s->pchip.win[1].tba; 258 break; 259 case 0x0280: 260 /* TBA2 */ 261 ret = s->pchip.win[2].tba; 262 break; 263 case 0x02c0: 264 /* TBA3 */ 265 ret = s->pchip.win[3].tba; 266 break; 267 268 case 0x0300: 269 /* PCTL: Pchip Control Register. */ 270 ret = s->pchip.ctl; 271 break; 272 case 0x0340: 273 /* PLAT: Pchip Master Latency Register. */ 274 break; 275 case 0x03c0: 276 /* PERROR: Pchip Error Register. */ 277 break; 278 case 0x0400: 279 /* PERRMASK: Pchip Error Mask Register. */ 280 break; 281 case 0x0440: 282 /* PERRSET: Pchip Error Set Register. */ 283 break; 284 case 0x0480: 285 /* TLBIV: Translation Buffer Invalidate Virtual Register (WO). */ 286 break; 287 case 0x04c0: 288 /* TLBIA: Translation Buffer Invalidate All Register (WO). */ 289 break; 290 case 0x0500: /* PMONCTL */ 291 case 0x0540: /* PMONCNT */ 292 case 0x0800: /* SPRST */ 293 break; 294 295 default: 296 cpu_unassigned_access(current_cpu, addr, false, false, 0, size); 297 return -1; 298 } 299 300 return ret; 301 } 302 303 static void cchip_write(void *opaque, hwaddr addr, 304 uint64_t val, unsigned size) 305 { 306 TyphoonState *s = opaque; 307 uint64_t oldval, newval; 308 309 switch (addr) { 310 case 0x0000: 311 /* CSC: Cchip System Configuration Register. */ 312 /* All sorts of data here; nothing relevant RW. */ 313 break; 314 315 case 0x0040: 316 /* MTR: Memory Timing Register. */ 317 /* All sorts of stuff related to real DRAM. */ 318 break; 319 320 case 0x0080: 321 /* MISC: Miscellaneous Register. */ 322 newval = oldval = s->cchip.misc; 323 newval &= ~(val & 0x10000ff0); /* W1C fields */ 324 if (val & 0x100000) { 325 newval &= ~0xff0000ull; /* ACL clears ABT and ABW */ 326 } else { 327 newval |= val & 0x00f00000; /* ABT field is W1S */ 328 if ((newval & 0xf0000) == 0) { 329 newval |= val & 0xf0000; /* ABW field is W1S iff zero */ 330 } 331 } 332 newval |= (val & 0xf000) >> 4; /* IPREQ field sets IPINTR. */ 333 334 newval &= ~0xf0000000000ull; /* WO and RW fields */ 335 newval |= val & 0xf0000000000ull; 336 s->cchip.misc = newval; 337 338 /* Pass on changes to IPI and ITI state. */ 339 if ((newval ^ oldval) & 0xff0) { 340 int i; 341 for (i = 0; i < 4; ++i) { 342 AlphaCPU *cpu = s->cchip.cpu[i]; 343 if (cpu != NULL) { 344 CPUState *cs = CPU(cpu); 345 /* IPI can be either cleared or set by the write. */ 346 if (newval & (1 << (i + 8))) { 347 cpu_interrupt(cs, CPU_INTERRUPT_SMP); 348 } else { 349 cpu_reset_interrupt(cs, CPU_INTERRUPT_SMP); 350 } 351 352 /* ITI can only be cleared by the write. */ 353 if ((newval & (1 << (i + 4))) == 0) { 354 cpu_reset_interrupt(cs, CPU_INTERRUPT_TIMER); 355 } 356 } 357 } 358 } 359 break; 360 361 case 0x00c0: 362 /* MPD: Memory Presence Detect Register. */ 363 break; 364 365 case 0x0100: /* AAR0 */ 366 case 0x0140: /* AAR1 */ 367 case 0x0180: /* AAR2 */ 368 case 0x01c0: /* AAR3 */ 369 /* AAR: Array Address Register. */ 370 /* All sorts of information about DRAM. */ 371 break; 372 373 case 0x0200: /* DIM0 */ 374 /* DIM: Device Interrupt Mask Register, CPU0. */ 375 s->cchip.dim[0] = val; 376 cpu_irq_change(s->cchip.cpu[0], val & s->cchip.drir); 377 break; 378 case 0x0240: /* DIM1 */ 379 /* DIM: Device Interrupt Mask Register, CPU1. */ 380 s->cchip.dim[1] = val; 381 cpu_irq_change(s->cchip.cpu[1], val & s->cchip.drir); 382 break; 383 384 case 0x0280: /* DIR0 (RO) */ 385 case 0x02c0: /* DIR1 (RO) */ 386 case 0x0300: /* DRIR (RO) */ 387 break; 388 389 case 0x0340: 390 /* PRBEN: Probe Enable Register. */ 391 break; 392 393 case 0x0380: /* IIC0 */ 394 s->cchip.iic[0] = val & 0xffffff; 395 break; 396 case 0x03c0: /* IIC1 */ 397 s->cchip.iic[1] = val & 0xffffff; 398 break; 399 400 case 0x0400: /* MPR0 */ 401 case 0x0440: /* MPR1 */ 402 case 0x0480: /* MPR2 */ 403 case 0x04c0: /* MPR3 */ 404 /* MPR: Memory Programming Register. */ 405 break; 406 407 case 0x0580: 408 /* TTR: TIGbus Timing Register. */ 409 /* All sorts of stuff related to interrupt delivery timings. */ 410 break; 411 case 0x05c0: 412 /* TDR: TIGbug Device Timing Register. */ 413 break; 414 415 case 0x0600: 416 /* DIM2: Device Interrupt Mask Register, CPU2. */ 417 s->cchip.dim[2] = val; 418 cpu_irq_change(s->cchip.cpu[2], val & s->cchip.drir); 419 break; 420 case 0x0640: 421 /* DIM3: Device Interrupt Mask Register, CPU3. */ 422 s->cchip.dim[3] = val; 423 cpu_irq_change(s->cchip.cpu[3], val & s->cchip.drir); 424 break; 425 426 case 0x0680: /* DIR2 (RO) */ 427 case 0x06c0: /* DIR3 (RO) */ 428 break; 429 430 case 0x0700: /* IIC2 */ 431 s->cchip.iic[2] = val & 0xffffff; 432 break; 433 case 0x0740: /* IIC3 */ 434 s->cchip.iic[3] = val & 0xffffff; 435 break; 436 437 case 0x0780: 438 /* PWR: Power Management Control. */ 439 break; 440 441 case 0x0c00: /* CMONCTLA */ 442 case 0x0c40: /* CMONCTLB */ 443 case 0x0c80: /* CMONCNT01 */ 444 case 0x0cc0: /* CMONCNT23 */ 445 break; 446 447 default: 448 cpu_unassigned_access(current_cpu, addr, true, false, 0, size); 449 return; 450 } 451 } 452 453 static void dchip_write(void *opaque, hwaddr addr, 454 uint64_t val, unsigned size) 455 { 456 /* Skip this. It's all related to DRAM timing and setup. */ 457 } 458 459 static void pchip_write(void *opaque, hwaddr addr, 460 uint64_t val, unsigned size) 461 { 462 TyphoonState *s = opaque; 463 uint64_t oldval; 464 465 switch (addr) { 466 case 0x0000: 467 /* WSBA0: Window Space Base Address Register. */ 468 s->pchip.win[0].wba = val & 0xfff00003u; 469 break; 470 case 0x0040: 471 /* WSBA1 */ 472 s->pchip.win[1].wba = val & 0xfff00003u; 473 break; 474 case 0x0080: 475 /* WSBA2 */ 476 s->pchip.win[2].wba = val & 0xfff00003u; 477 break; 478 case 0x00c0: 479 /* WSBA3 */ 480 s->pchip.win[3].wba = (val & 0x80fff00001ull) | 2; 481 break; 482 483 case 0x0100: 484 /* WSM0: Window Space Mask Register. */ 485 s->pchip.win[0].wsm = val & 0xfff00000u; 486 break; 487 case 0x0140: 488 /* WSM1 */ 489 s->pchip.win[1].wsm = val & 0xfff00000u; 490 break; 491 case 0x0180: 492 /* WSM2 */ 493 s->pchip.win[2].wsm = val & 0xfff00000u; 494 break; 495 case 0x01c0: 496 /* WSM3 */ 497 s->pchip.win[3].wsm = val & 0xfff00000u; 498 break; 499 500 case 0x0200: 501 /* TBA0: Translated Base Address Register. */ 502 s->pchip.win[0].tba = val & 0x7fffffc00ull; 503 break; 504 case 0x0240: 505 /* TBA1 */ 506 s->pchip.win[1].tba = val & 0x7fffffc00ull; 507 break; 508 case 0x0280: 509 /* TBA2 */ 510 s->pchip.win[2].tba = val & 0x7fffffc00ull; 511 break; 512 case 0x02c0: 513 /* TBA3 */ 514 s->pchip.win[3].tba = val & 0x7fffffc00ull; 515 break; 516 517 case 0x0300: 518 /* PCTL: Pchip Control Register. */ 519 oldval = s->pchip.ctl; 520 oldval &= ~0x00001cff0fc7ffull; /* RW fields */ 521 oldval |= val & 0x00001cff0fc7ffull; 522 s->pchip.ctl = oldval; 523 break; 524 525 case 0x0340: 526 /* PLAT: Pchip Master Latency Register. */ 527 break; 528 case 0x03c0: 529 /* PERROR: Pchip Error Register. */ 530 break; 531 case 0x0400: 532 /* PERRMASK: Pchip Error Mask Register. */ 533 break; 534 case 0x0440: 535 /* PERRSET: Pchip Error Set Register. */ 536 break; 537 538 case 0x0480: 539 /* TLBIV: Translation Buffer Invalidate Virtual Register. */ 540 break; 541 542 case 0x04c0: 543 /* TLBIA: Translation Buffer Invalidate All Register (WO). */ 544 break; 545 546 case 0x0500: 547 /* PMONCTL */ 548 case 0x0540: 549 /* PMONCNT */ 550 case 0x0800: 551 /* SPRST */ 552 break; 553 554 default: 555 cpu_unassigned_access(current_cpu, addr, true, false, 0, size); 556 return; 557 } 558 } 559 560 static const MemoryRegionOps cchip_ops = { 561 .read = cchip_read, 562 .write = cchip_write, 563 .endianness = DEVICE_LITTLE_ENDIAN, 564 .valid = { 565 .min_access_size = 8, 566 .max_access_size = 8, 567 }, 568 .impl = { 569 .min_access_size = 8, 570 .max_access_size = 8, 571 }, 572 }; 573 574 static const MemoryRegionOps dchip_ops = { 575 .read = dchip_read, 576 .write = dchip_write, 577 .endianness = DEVICE_LITTLE_ENDIAN, 578 .valid = { 579 .min_access_size = 8, 580 .max_access_size = 8, 581 }, 582 .impl = { 583 .min_access_size = 8, 584 .max_access_size = 8, 585 }, 586 }; 587 588 static const MemoryRegionOps pchip_ops = { 589 .read = pchip_read, 590 .write = pchip_write, 591 .endianness = DEVICE_LITTLE_ENDIAN, 592 .valid = { 593 .min_access_size = 8, 594 .max_access_size = 8, 595 }, 596 .impl = { 597 .min_access_size = 8, 598 .max_access_size = 8, 599 }, 600 }; 601 602 /* A subroutine of typhoon_translate_iommu that builds an IOMMUTLBEntry 603 using the given translated address and mask. */ 604 static bool make_iommu_tlbe(hwaddr taddr, hwaddr mask, IOMMUTLBEntry *ret) 605 { 606 *ret = (IOMMUTLBEntry) { 607 .target_as = &address_space_memory, 608 .translated_addr = taddr, 609 .addr_mask = mask, 610 .perm = IOMMU_RW, 611 }; 612 return true; 613 } 614 615 /* A subroutine of typhoon_translate_iommu that handles scatter-gather 616 translation, given the address of the PTE. */ 617 static bool pte_translate(hwaddr pte_addr, IOMMUTLBEntry *ret) 618 { 619 uint64_t pte = address_space_ldq(&address_space_memory, pte_addr, 620 MEMTXATTRS_UNSPECIFIED, NULL); 621 622 /* Check valid bit. */ 623 if ((pte & 1) == 0) { 624 return false; 625 } 626 627 return make_iommu_tlbe((pte & 0x3ffffe) << 12, 0x1fff, ret); 628 } 629 630 /* A subroutine of typhoon_translate_iommu that handles one of the 631 four single-address-cycle translation windows. */ 632 static bool window_translate(TyphoonWindow *win, hwaddr addr, 633 IOMMUTLBEntry *ret) 634 { 635 uint32_t wba = win->wba; 636 uint64_t wsm = win->wsm; 637 uint64_t tba = win->tba; 638 uint64_t wsm_ext = wsm | 0xfffff; 639 640 /* Check for window disabled. */ 641 if ((wba & 1) == 0) { 642 return false; 643 } 644 645 /* Check for window hit. */ 646 if ((addr & ~wsm_ext) != (wba & 0xfff00000u)) { 647 return false; 648 } 649 650 if (wba & 2) { 651 /* Scatter-gather translation. */ 652 hwaddr pte_addr; 653 654 /* See table 10-6, Generating PTE address for PCI DMA Address. */ 655 pte_addr = tba & ~(wsm >> 10); 656 pte_addr |= (addr & (wsm | 0xfe000)) >> 10; 657 return pte_translate(pte_addr, ret); 658 } else { 659 /* Direct-mapped translation. */ 660 return make_iommu_tlbe(tba & ~wsm_ext, wsm_ext, ret); 661 } 662 } 663 664 /* Handle PCI-to-system address translation. */ 665 /* TODO: A translation failure here ought to set PCI error codes on the 666 Pchip and generate a machine check interrupt. */ 667 static IOMMUTLBEntry typhoon_translate_iommu(IOMMUMemoryRegion *iommu, 668 hwaddr addr, 669 IOMMUAccessFlags flag) 670 { 671 TyphoonPchip *pchip = container_of(iommu, TyphoonPchip, iommu); 672 IOMMUTLBEntry ret; 673 int i; 674 675 if (addr <= 0xffffffffu) { 676 /* Single-address cycle. */ 677 678 /* Check for the Window Hole, inhibiting matching. */ 679 if ((pchip->ctl & 0x20) 680 && addr >= 0x80000 681 && addr <= 0xfffff) { 682 goto failure; 683 } 684 685 /* Check the first three windows. */ 686 for (i = 0; i < 3; ++i) { 687 if (window_translate(&pchip->win[i], addr, &ret)) { 688 goto success; 689 } 690 } 691 692 /* Check the fourth window for DAC disable. */ 693 if ((pchip->win[3].wba & 0x80000000000ull) == 0 694 && window_translate(&pchip->win[3], addr, &ret)) { 695 goto success; 696 } 697 } else { 698 /* Double-address cycle. */ 699 700 if (addr >= 0x10000000000ull && addr < 0x20000000000ull) { 701 /* Check for the DMA monster window. */ 702 if (pchip->ctl & 0x40) { 703 /* See 10.1.4.4; in particular <39:35> is ignored. */ 704 make_iommu_tlbe(0, 0x007ffffffffull, &ret); 705 goto success; 706 } 707 } 708 709 if (addr >= 0x80000000000ull && addr <= 0xfffffffffffull) { 710 /* Check the fourth window for DAC enable and window enable. */ 711 if ((pchip->win[3].wba & 0x80000000001ull) == 0x80000000001ull) { 712 uint64_t pte_addr; 713 714 pte_addr = pchip->win[3].tba & 0x7ffc00000ull; 715 pte_addr |= (addr & 0xffffe000u) >> 10; 716 if (pte_translate(pte_addr, &ret)) { 717 goto success; 718 } 719 } 720 } 721 } 722 723 failure: 724 ret = (IOMMUTLBEntry) { .perm = IOMMU_NONE }; 725 success: 726 return ret; 727 } 728 729 static AddressSpace *typhoon_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 730 { 731 TyphoonState *s = opaque; 732 return &s->pchip.iommu_as; 733 } 734 735 static void typhoon_set_irq(void *opaque, int irq, int level) 736 { 737 TyphoonState *s = opaque; 738 uint64_t drir; 739 int i; 740 741 /* Set/Reset the bit in CCHIP.DRIR based on IRQ+LEVEL. */ 742 drir = s->cchip.drir; 743 if (level) { 744 drir |= 1ull << irq; 745 } else { 746 drir &= ~(1ull << irq); 747 } 748 s->cchip.drir = drir; 749 750 for (i = 0; i < 4; ++i) { 751 cpu_irq_change(s->cchip.cpu[i], s->cchip.dim[i] & drir); 752 } 753 } 754 755 static void typhoon_set_isa_irq(void *opaque, int irq, int level) 756 { 757 typhoon_set_irq(opaque, 55, level); 758 } 759 760 static void typhoon_set_timer_irq(void *opaque, int irq, int level) 761 { 762 TyphoonState *s = opaque; 763 int i; 764 765 /* Thankfully, the mc146818rtc code doesn't track the IRQ state, 766 and so we don't have to worry about missing interrupts just 767 because we never actually ACK the interrupt. Just ignore any 768 case of the interrupt level going low. */ 769 if (level == 0) { 770 return; 771 } 772 773 /* Deliver the interrupt to each CPU, considering each CPU's IIC. */ 774 for (i = 0; i < 4; ++i) { 775 AlphaCPU *cpu = s->cchip.cpu[i]; 776 if (cpu != NULL) { 777 uint32_t iic = s->cchip.iic[i]; 778 779 /* ??? The verbage in Section 10.2.2.10 isn't 100% clear. 780 Bit 24 is the OverFlow bit, RO, and set when the count 781 decrements past 0. When is OF cleared? My guess is that 782 OF is actually cleared when the IIC is written, and that 783 the ICNT field always decrements. At least, that's an 784 interpretation that makes sense, and "allows the CPU to 785 determine exactly how mant interval timer ticks were 786 skipped". At least within the next 4M ticks... */ 787 788 iic = ((iic - 1) & 0x1ffffff) | (iic & 0x1000000); 789 s->cchip.iic[i] = iic; 790 791 if (iic & 0x1000000) { 792 /* Set the ITI bit for this cpu. */ 793 s->cchip.misc |= 1 << (i + 4); 794 /* And signal the interrupt. */ 795 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_TIMER); 796 } 797 } 798 } 799 } 800 801 static void typhoon_alarm_timer(void *opaque) 802 { 803 TyphoonState *s = (TyphoonState *)((uintptr_t)opaque & ~3); 804 int cpu = (uintptr_t)opaque & 3; 805 806 /* Set the ITI bit for this cpu. */ 807 s->cchip.misc |= 1 << (cpu + 4); 808 cpu_interrupt(CPU(s->cchip.cpu[cpu]), CPU_INTERRUPT_TIMER); 809 } 810 811 PCIBus *typhoon_init(ram_addr_t ram_size, ISABus **isa_bus, 812 qemu_irq *p_rtc_irq, 813 AlphaCPU *cpus[4], pci_map_irq_fn sys_map_irq) 814 { 815 const uint64_t MB = 1024 * 1024; 816 const uint64_t GB = 1024 * MB; 817 MemoryRegion *addr_space = get_system_memory(); 818 DeviceState *dev; 819 TyphoonState *s; 820 PCIHostState *phb; 821 PCIBus *b; 822 int i; 823 824 dev = qdev_create(NULL, TYPE_TYPHOON_PCI_HOST_BRIDGE); 825 826 s = TYPHOON_PCI_HOST_BRIDGE(dev); 827 phb = PCI_HOST_BRIDGE(dev); 828 829 s->cchip.misc = 0x800000000ull; /* Revision: Typhoon. */ 830 s->pchip.win[3].wba = 2; /* Window 3 SG always enabled. */ 831 832 /* Remember the CPUs so that we can deliver interrupts to them. */ 833 for (i = 0; i < 4; i++) { 834 AlphaCPU *cpu = cpus[i]; 835 s->cchip.cpu[i] = cpu; 836 if (cpu != NULL) { 837 cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 838 typhoon_alarm_timer, 839 (void *)((uintptr_t)s + i)); 840 } 841 } 842 843 *p_rtc_irq = qemu_allocate_irq(typhoon_set_timer_irq, s, 0); 844 845 /* Main memory region, 0x00.0000.0000. Real hardware supports 32GB, 846 but the address space hole reserved at this point is 8TB. */ 847 memory_region_allocate_system_memory(&s->ram_region, OBJECT(s), "ram", 848 ram_size); 849 memory_region_add_subregion(addr_space, 0, &s->ram_region); 850 851 /* TIGbus, 0x801.0000.0000, 1GB. */ 852 /* ??? The TIGbus is used for delivering interrupts, and access to 853 the flash ROM. I'm not sure that we need to implement it at all. */ 854 855 /* Pchip0 CSRs, 0x801.8000.0000, 256MB. */ 856 memory_region_init_io(&s->pchip.region, OBJECT(s), &pchip_ops, s, "pchip0", 857 256*MB); 858 memory_region_add_subregion(addr_space, 0x80180000000ULL, 859 &s->pchip.region); 860 861 /* Cchip CSRs, 0x801.A000.0000, 256MB. */ 862 memory_region_init_io(&s->cchip.region, OBJECT(s), &cchip_ops, s, "cchip0", 863 256*MB); 864 memory_region_add_subregion(addr_space, 0x801a0000000ULL, 865 &s->cchip.region); 866 867 /* Dchip CSRs, 0x801.B000.0000, 256MB. */ 868 memory_region_init_io(&s->dchip_region, OBJECT(s), &dchip_ops, s, "dchip0", 869 256*MB); 870 memory_region_add_subregion(addr_space, 0x801b0000000ULL, 871 &s->dchip_region); 872 873 /* Pchip0 PCI memory, 0x800.0000.0000, 4GB. */ 874 memory_region_init(&s->pchip.reg_mem, OBJECT(s), "pci0-mem", 4*GB); 875 memory_region_add_subregion(addr_space, 0x80000000000ULL, 876 &s->pchip.reg_mem); 877 878 /* Pchip0 PCI I/O, 0x801.FC00.0000, 32MB. */ 879 memory_region_init_io(&s->pchip.reg_io, OBJECT(s), &alpha_pci_ignore_ops, 880 NULL, "pci0-io", 32*MB); 881 memory_region_add_subregion(addr_space, 0x801fc000000ULL, 882 &s->pchip.reg_io); 883 884 b = pci_register_root_bus(dev, "pci", 885 typhoon_set_irq, sys_map_irq, s, 886 &s->pchip.reg_mem, &s->pchip.reg_io, 887 0, 64, TYPE_PCI_BUS); 888 phb->bus = b; 889 qdev_init_nofail(dev); 890 891 /* Host memory as seen from the PCI side, via the IOMMU. */ 892 memory_region_init_iommu(&s->pchip.iommu, sizeof(s->pchip.iommu), 893 TYPE_TYPHOON_IOMMU_MEMORY_REGION, OBJECT(s), 894 "iommu-typhoon", UINT64_MAX); 895 address_space_init(&s->pchip.iommu_as, MEMORY_REGION(&s->pchip.iommu), 896 "pchip0-pci"); 897 pci_setup_iommu(b, typhoon_pci_dma_iommu, s); 898 899 /* Pchip0 PCI special/interrupt acknowledge, 0x801.F800.0000, 64MB. */ 900 memory_region_init_io(&s->pchip.reg_iack, OBJECT(s), &alpha_pci_iack_ops, 901 b, "pci0-iack", 64*MB); 902 memory_region_add_subregion(addr_space, 0x801f8000000ULL, 903 &s->pchip.reg_iack); 904 905 /* Pchip0 PCI configuration, 0x801.FE00.0000, 16MB. */ 906 memory_region_init_io(&s->pchip.reg_conf, OBJECT(s), &alpha_pci_conf1_ops, 907 b, "pci0-conf", 16*MB); 908 memory_region_add_subregion(addr_space, 0x801fe000000ULL, 909 &s->pchip.reg_conf); 910 911 /* For the record, these are the mappings for the second PCI bus. 912 We can get away with not implementing them because we indicate 913 via the Cchip.CSC<PIP> bit that Pchip1 is not present. */ 914 /* Pchip1 PCI memory, 0x802.0000.0000, 4GB. */ 915 /* Pchip1 CSRs, 0x802.8000.0000, 256MB. */ 916 /* Pchip1 PCI special/interrupt acknowledge, 0x802.F800.0000, 64MB. */ 917 /* Pchip1 PCI I/O, 0x802.FC00.0000, 32MB. */ 918 /* Pchip1 PCI configuration, 0x802.FE00.0000, 16MB. */ 919 920 /* Init the ISA bus. */ 921 /* ??? Technically there should be a cy82c693ub pci-isa bridge. */ 922 { 923 qemu_irq *isa_irqs; 924 925 *isa_bus = isa_bus_new(NULL, get_system_memory(), &s->pchip.reg_io, 926 &error_abort); 927 isa_irqs = i8259_init(*isa_bus, 928 qemu_allocate_irq(typhoon_set_isa_irq, s, 0)); 929 isa_bus_irqs(*isa_bus, isa_irqs); 930 } 931 932 return b; 933 } 934 935 static int typhoon_pcihost_init(SysBusDevice *dev) 936 { 937 return 0; 938 } 939 940 static void typhoon_pcihost_class_init(ObjectClass *klass, void *data) 941 { 942 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 943 944 k->init = typhoon_pcihost_init; 945 } 946 947 static const TypeInfo typhoon_pcihost_info = { 948 .name = TYPE_TYPHOON_PCI_HOST_BRIDGE, 949 .parent = TYPE_PCI_HOST_BRIDGE, 950 .instance_size = sizeof(TyphoonState), 951 .class_init = typhoon_pcihost_class_init, 952 }; 953 954 static void typhoon_iommu_memory_region_class_init(ObjectClass *klass, 955 void *data) 956 { 957 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); 958 959 imrc->translate = typhoon_translate_iommu; 960 } 961 962 static const TypeInfo typhoon_iommu_memory_region_info = { 963 .parent = TYPE_IOMMU_MEMORY_REGION, 964 .name = TYPE_TYPHOON_IOMMU_MEMORY_REGION, 965 .class_init = typhoon_iommu_memory_region_class_init, 966 }; 967 968 static void typhoon_register_types(void) 969 { 970 type_register_static(&typhoon_pcihost_info); 971 type_register_static(&typhoon_iommu_memory_region_info); 972 } 973 974 type_init(typhoon_register_types) 975