1 /* 2 * QEMU Ultrasparc Sabre PCI host (PBM) 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * Copyright (c) 2012,2013 Artyom Tarasenko 6 * Copyright (c) 2018 Mark Cave-Ayland 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 27 #include "qemu/osdep.h" 28 #include "hw/sysbus.h" 29 #include "hw/pci/pci.h" 30 #include "hw/pci/pci_host.h" 31 #include "hw/pci/pci_bridge.h" 32 #include "hw/pci/pci_bus.h" 33 #include "hw/pci-bridge/simba.h" 34 #include "hw/pci-host/sabre.h" 35 #include "sysemu/sysemu.h" 36 #include "exec/address-spaces.h" 37 #include "qemu/log.h" 38 #include "trace.h" 39 40 /* 41 * Chipset docs: 42 * PBM: "UltraSPARC IIi User's Manual", 43 * http://www.sun.com/processors/manuals/805-0087.pdf 44 */ 45 46 #define PBM_PCI_IMR_MASK 0x7fffffff 47 #define PBM_PCI_IMR_ENABLED 0x80000000 48 49 #define POR (1U << 31) 50 #define SOFT_POR (1U << 30) 51 #define SOFT_XIR (1U << 29) 52 #define BTN_POR (1U << 28) 53 #define BTN_XIR (1U << 27) 54 #define RESET_MASK 0xf8000000 55 #define RESET_WCMASK 0x98000000 56 #define RESET_WMASK 0x60000000 57 58 #define NO_IRQ_REQUEST (MAX_IVEC + 1) 59 60 static inline void sabre_set_request(SabreState *s, unsigned int irq_num) 61 { 62 trace_sabre_set_request(irq_num); 63 s->irq_request = irq_num; 64 qemu_set_irq(s->ivec_irqs[irq_num], 1); 65 } 66 67 static inline void sabre_check_irqs(SabreState *s) 68 { 69 unsigned int i; 70 71 /* Previous request is not acknowledged, resubmit */ 72 if (s->irq_request != NO_IRQ_REQUEST) { 73 sabre_set_request(s, s->irq_request); 74 return; 75 } 76 /* no request pending */ 77 if (s->pci_irq_in == 0ULL) { 78 return; 79 } 80 for (i = 0; i < 32; i++) { 81 if (s->pci_irq_in & (1ULL << i)) { 82 if (s->pci_irq_map[i >> 2] & PBM_PCI_IMR_ENABLED) { 83 sabre_set_request(s, i); 84 return; 85 } 86 } 87 } 88 for (i = 32; i < 64; i++) { 89 if (s->pci_irq_in & (1ULL << i)) { 90 if (s->obio_irq_map[i - 32] & PBM_PCI_IMR_ENABLED) { 91 sabre_set_request(s, i); 92 break; 93 } 94 } 95 } 96 } 97 98 static inline void sabre_clear_request(SabreState *s, unsigned int irq_num) 99 { 100 trace_sabre_clear_request(irq_num); 101 qemu_set_irq(s->ivec_irqs[irq_num], 0); 102 s->irq_request = NO_IRQ_REQUEST; 103 } 104 105 static AddressSpace *sabre_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 106 { 107 IOMMUState *is = opaque; 108 109 return &is->iommu_as; 110 } 111 112 static void sabre_config_write(void *opaque, hwaddr addr, 113 uint64_t val, unsigned size) 114 { 115 SabreState *s = opaque; 116 117 trace_sabre_config_write(addr, val); 118 119 switch (addr & 0xffff) { 120 case 0x30 ... 0x4f: /* DMA error registers */ 121 /* XXX: not implemented yet */ 122 break; 123 case 0xc00 ... 0xc3f: /* PCI interrupt control */ 124 if (addr & 4) { 125 unsigned int ino = (addr & 0x3f) >> 3; 126 s->pci_irq_map[ino] &= PBM_PCI_IMR_MASK; 127 s->pci_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; 128 if ((s->irq_request == ino) && !(val & ~PBM_PCI_IMR_MASK)) { 129 sabre_clear_request(s, ino); 130 } 131 sabre_check_irqs(s); 132 } 133 break; 134 case 0x1000 ... 0x107f: /* OBIO interrupt control */ 135 if (addr & 4) { 136 unsigned int ino = ((addr & 0xff) >> 3); 137 s->obio_irq_map[ino] &= PBM_PCI_IMR_MASK; 138 s->obio_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; 139 if ((s->irq_request == (ino | 0x20)) 140 && !(val & ~PBM_PCI_IMR_MASK)) { 141 sabre_clear_request(s, ino | 0x20); 142 } 143 sabre_check_irqs(s); 144 } 145 break; 146 case 0x1400 ... 0x14ff: /* PCI interrupt clear */ 147 if (addr & 4) { 148 unsigned int ino = (addr & 0xff) >> 5; 149 if ((s->irq_request / 4) == ino) { 150 sabre_clear_request(s, s->irq_request); 151 sabre_check_irqs(s); 152 } 153 } 154 break; 155 case 0x1800 ... 0x1860: /* OBIO interrupt clear */ 156 if (addr & 4) { 157 unsigned int ino = ((addr & 0xff) >> 3) | 0x20; 158 if (s->irq_request == ino) { 159 sabre_clear_request(s, ino); 160 sabre_check_irqs(s); 161 } 162 } 163 break; 164 case 0x2000 ... 0x202f: /* PCI control */ 165 s->pci_control[(addr & 0x3f) >> 2] = val; 166 break; 167 case 0xf020 ... 0xf027: /* Reset control */ 168 if (addr & 4) { 169 val &= RESET_MASK; 170 s->reset_control &= ~(val & RESET_WCMASK); 171 s->reset_control |= val & RESET_WMASK; 172 if (val & SOFT_POR) { 173 s->nr_resets = 0; 174 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 175 } else if (val & SOFT_XIR) { 176 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 177 } 178 } 179 break; 180 case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ 181 case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ 182 case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ 183 case 0xf000 ... 0xf01f: /* FFB config, memory control */ 184 /* we don't care */ 185 default: 186 break; 187 } 188 } 189 190 static uint64_t sabre_config_read(void *opaque, 191 hwaddr addr, unsigned size) 192 { 193 SabreState *s = opaque; 194 uint32_t val; 195 196 switch (addr & 0xffff) { 197 case 0x30 ... 0x4f: /* DMA error registers */ 198 val = 0; 199 /* XXX: not implemented yet */ 200 break; 201 case 0xc00 ... 0xc3f: /* PCI interrupt control */ 202 if (addr & 4) { 203 val = s->pci_irq_map[(addr & 0x3f) >> 3]; 204 } else { 205 val = 0; 206 } 207 break; 208 case 0x1000 ... 0x107f: /* OBIO interrupt control */ 209 if (addr & 4) { 210 val = s->obio_irq_map[(addr & 0xff) >> 3]; 211 } else { 212 val = 0; 213 } 214 break; 215 case 0x1080 ... 0x108f: /* PCI bus error */ 216 if (addr & 4) { 217 val = s->pci_err_irq_map[(addr & 0xf) >> 3]; 218 } else { 219 val = 0; 220 } 221 break; 222 case 0x2000 ... 0x202f: /* PCI control */ 223 val = s->pci_control[(addr & 0x3f) >> 2]; 224 break; 225 case 0xf020 ... 0xf027: /* Reset control */ 226 if (addr & 4) { 227 val = s->reset_control; 228 } else { 229 val = 0; 230 } 231 break; 232 case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ 233 case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ 234 case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ 235 case 0xf000 ... 0xf01f: /* FFB config, memory control */ 236 /* we don't care */ 237 default: 238 val = 0; 239 break; 240 } 241 trace_sabre_config_read(addr, val); 242 243 return val; 244 } 245 246 static const MemoryRegionOps sabre_config_ops = { 247 .read = sabre_config_read, 248 .write = sabre_config_write, 249 .endianness = DEVICE_BIG_ENDIAN, 250 }; 251 252 static void sabre_pci_config_write(void *opaque, hwaddr addr, 253 uint64_t val, unsigned size) 254 { 255 SabreState *s = opaque; 256 PCIHostState *phb = PCI_HOST_BRIDGE(s); 257 258 trace_sabre_pci_config_write(addr, val); 259 pci_data_write(phb->bus, addr, val, size); 260 } 261 262 static uint64_t sabre_pci_config_read(void *opaque, hwaddr addr, 263 unsigned size) 264 { 265 uint32_t ret; 266 SabreState *s = opaque; 267 PCIHostState *phb = PCI_HOST_BRIDGE(s); 268 269 ret = pci_data_read(phb->bus, addr, size); 270 trace_sabre_pci_config_read(addr, ret); 271 return ret; 272 } 273 274 /* The sabre host has an IRQ line for each IRQ line of each slot. */ 275 static int pci_sabre_map_irq(PCIDevice *pci_dev, int irq_num) 276 { 277 /* Return the irq as swizzled by the PBM */ 278 return irq_num; 279 } 280 281 static int pci_simbaA_map_irq(PCIDevice *pci_dev, int irq_num) 282 { 283 /* The on-board devices have fixed (legacy) OBIO intnos */ 284 switch (PCI_SLOT(pci_dev->devfn)) { 285 case 1: 286 /* Onboard NIC */ 287 return OBIO_NIC_IRQ; 288 case 3: 289 /* Onboard IDE */ 290 return OBIO_HDD_IRQ; 291 default: 292 /* Normal intno, fall through */ 293 break; 294 } 295 296 return ((PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; 297 } 298 299 static int pci_simbaB_map_irq(PCIDevice *pci_dev, int irq_num) 300 { 301 return (0x10 + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; 302 } 303 304 static void pci_sabre_set_irq(void *opaque, int irq_num, int level) 305 { 306 SabreState *s = opaque; 307 308 trace_sabre_pci_set_irq(irq_num, level); 309 310 /* PCI IRQ map onto the first 32 INO. */ 311 if (irq_num < 32) { 312 if (level) { 313 s->pci_irq_in |= 1ULL << irq_num; 314 if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) { 315 sabre_set_request(s, irq_num); 316 } 317 } else { 318 s->pci_irq_in &= ~(1ULL << irq_num); 319 } 320 } else { 321 /* OBIO IRQ map onto the next 32 INO. */ 322 if (level) { 323 trace_sabre_pci_set_obio_irq(irq_num, level); 324 s->pci_irq_in |= 1ULL << irq_num; 325 if ((s->irq_request == NO_IRQ_REQUEST) 326 && (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED)) { 327 sabre_set_request(s, irq_num); 328 } 329 } else { 330 s->pci_irq_in &= ~(1ULL << irq_num); 331 } 332 } 333 } 334 335 static void sabre_reset(DeviceState *d) 336 { 337 SabreState *s = SABRE_DEVICE(d); 338 PCIDevice *pci_dev; 339 unsigned int i; 340 uint16_t cmd; 341 342 for (i = 0; i < 8; i++) { 343 s->pci_irq_map[i] &= PBM_PCI_IMR_MASK; 344 } 345 for (i = 0; i < 32; i++) { 346 s->obio_irq_map[i] &= PBM_PCI_IMR_MASK; 347 } 348 349 s->irq_request = NO_IRQ_REQUEST; 350 s->pci_irq_in = 0ULL; 351 352 if (s->nr_resets++ == 0) { 353 /* Power on reset */ 354 s->reset_control = POR; 355 } 356 357 /* As this is the busA PCI bridge which contains the on-board devices 358 * attached to the ebus, ensure that we initially allow IO transactions 359 * so that we get the early serial console until OpenBIOS can properly 360 * configure the PCI bridge itself */ 361 pci_dev = PCI_DEVICE(s->bridgeA); 362 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 363 pci_set_word(pci_dev->config + PCI_COMMAND, cmd | PCI_COMMAND_IO); 364 pci_bridge_update_mappings(PCI_BRIDGE(pci_dev)); 365 } 366 367 static const MemoryRegionOps pci_config_ops = { 368 .read = sabre_pci_config_read, 369 .write = sabre_pci_config_write, 370 .endianness = DEVICE_LITTLE_ENDIAN, 371 }; 372 373 static void sabre_realize(DeviceState *dev, Error **errp) 374 { 375 SabreState *s = SABRE_DEVICE(dev); 376 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 377 SysBusDevice *sbd = SYS_BUS_DEVICE(s); 378 PCIDevice *pci_dev; 379 380 /* sabre_config */ 381 sysbus_mmio_map(sbd, 0, s->special_base); 382 /* PCI configuration space */ 383 sysbus_mmio_map(sbd, 1, s->special_base + 0x1000000ULL); 384 /* pci_ioport */ 385 sysbus_mmio_map(sbd, 2, s->special_base + 0x2000000ULL); 386 387 memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL); 388 memory_region_add_subregion(get_system_memory(), s->mem_base, 389 &s->pci_mmio); 390 391 phb->bus = pci_register_root_bus(dev, "pci", 392 pci_sabre_set_irq, pci_sabre_map_irq, s, 393 &s->pci_mmio, 394 &s->pci_ioport, 395 0, 32, TYPE_PCI_BUS); 396 397 pci_create_simple(phb->bus, 0, TYPE_SABRE_PCI_DEVICE); 398 399 /* IOMMU */ 400 memory_region_add_subregion_overlap(&s->sabre_config, 0x200, 401 sysbus_mmio_get_region(SYS_BUS_DEVICE(s->iommu), 0), 1); 402 pci_setup_iommu(phb->bus, sabre_pci_dma_iommu, s->iommu); 403 404 /* APB secondary busses */ 405 pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 0), true, 406 TYPE_SIMBA_PCI_BRIDGE); 407 s->bridgeB = PCI_BRIDGE(pci_dev); 408 pci_bridge_map_irq(s->bridgeB, "pciB", pci_simbaB_map_irq); 409 qdev_init_nofail(&pci_dev->qdev); 410 411 pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 1), true, 412 TYPE_SIMBA_PCI_BRIDGE); 413 s->bridgeA = PCI_BRIDGE(pci_dev); 414 pci_bridge_map_irq(s->bridgeA, "pciA", pci_simbaA_map_irq); 415 qdev_init_nofail(&pci_dev->qdev); 416 } 417 418 static void sabre_init(Object *obj) 419 { 420 SabreState *s = SABRE_DEVICE(obj); 421 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 422 unsigned int i; 423 424 for (i = 0; i < 8; i++) { 425 s->pci_irq_map[i] = (0x1f << 6) | (i << 2); 426 } 427 for (i = 0; i < 2; i++) { 428 s->pci_err_irq_map[i] = (0x1f << 6) | 0x30; 429 } 430 for (i = 0; i < 32; i++) { 431 s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i; 432 } 433 qdev_init_gpio_in_named(DEVICE(s), pci_sabre_set_irq, "pbm-irq", MAX_IVEC); 434 qdev_init_gpio_out_named(DEVICE(s), s->ivec_irqs, "ivec-irq", MAX_IVEC); 435 s->irq_request = NO_IRQ_REQUEST; 436 s->pci_irq_in = 0ULL; 437 438 /* IOMMU */ 439 object_property_add_link(obj, "iommu", TYPE_SUN4U_IOMMU, 440 (Object **) &s->iommu, 441 qdev_prop_allow_set_link_before_realize, 442 0, NULL); 443 444 /* sabre_config */ 445 memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s, 446 "sabre-config", 0x10000); 447 /* at region 0 */ 448 sysbus_init_mmio(sbd, &s->sabre_config); 449 450 memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s, 451 "sabre-pci-config", 0x1000000); 452 /* at region 1 */ 453 sysbus_init_mmio(sbd, &s->pci_config); 454 455 /* pci_ioport */ 456 memory_region_init(&s->pci_ioport, OBJECT(s), "sabre-pci-ioport", 457 0x1000000); 458 459 /* at region 2 */ 460 sysbus_init_mmio(sbd, &s->pci_ioport); 461 } 462 463 static void sabre_pci_realize(PCIDevice *d, Error **errp) 464 { 465 pci_set_word(d->config + PCI_COMMAND, 466 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 467 pci_set_word(d->config + PCI_STATUS, 468 PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ | 469 PCI_STATUS_DEVSEL_MEDIUM); 470 } 471 472 static void sabre_pci_class_init(ObjectClass *klass, void *data) 473 { 474 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 475 DeviceClass *dc = DEVICE_CLASS(klass); 476 477 k->realize = sabre_pci_realize; 478 k->vendor_id = PCI_VENDOR_ID_SUN; 479 k->device_id = PCI_DEVICE_ID_SUN_SABRE; 480 k->class_id = PCI_CLASS_BRIDGE_HOST; 481 /* 482 * PCI-facing part of the host bridge, not usable without the 483 * host-facing part, which can't be device_add'ed, yet. 484 */ 485 dc->user_creatable = false; 486 } 487 488 static const TypeInfo sabre_pci_info = { 489 .name = TYPE_SABRE_PCI_DEVICE, 490 .parent = TYPE_PCI_DEVICE, 491 .instance_size = sizeof(SabrePCIState), 492 .class_init = sabre_pci_class_init, 493 .interfaces = (InterfaceInfo[]) { 494 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 495 { }, 496 }, 497 }; 498 499 static char *sabre_ofw_unit_address(const SysBusDevice *dev) 500 { 501 SabreState *s = SABRE_DEVICE(dev); 502 503 return g_strdup_printf("%x,%x", 504 (uint32_t)((s->special_base >> 32) & 0xffffffff), 505 (uint32_t)(s->special_base & 0xffffffff)); 506 } 507 508 static Property sabre_properties[] = { 509 DEFINE_PROP_UINT64("special-base", SabreState, special_base, 0), 510 DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0), 511 DEFINE_PROP_END_OF_LIST(), 512 }; 513 514 static void sabre_class_init(ObjectClass *klass, void *data) 515 { 516 DeviceClass *dc = DEVICE_CLASS(klass); 517 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass); 518 519 dc->realize = sabre_realize; 520 dc->reset = sabre_reset; 521 dc->props = sabre_properties; 522 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 523 dc->fw_name = "pci"; 524 sbc->explicit_ofw_unit_address = sabre_ofw_unit_address; 525 } 526 527 static const TypeInfo sabre_info = { 528 .name = TYPE_SABRE, 529 .parent = TYPE_PCI_HOST_BRIDGE, 530 .instance_size = sizeof(SabreState), 531 .instance_init = sabre_init, 532 .class_init = sabre_class_init, 533 }; 534 535 static void sabre_register_types(void) 536 { 537 type_register_static(&sabre_info); 538 type_register_static(&sabre_pci_info); 539 } 540 541 type_init(sabre_register_types) 542