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/qdev-properties.h" 32 #include "hw/pci/pci_bridge.h" 33 #include "hw/pci/pci_bus.h" 34 #include "hw/irq.h" 35 #include "hw/pci-bridge/simba.h" 36 #include "hw/pci-host/sabre.h" 37 #include "qapi/error.h" 38 #include "qemu/log.h" 39 #include "qemu/module.h" 40 #include "sysemu/runstate.h" 41 #include "trace.h" 42 43 /* 44 * Chipset docs: 45 * PBM: "UltraSPARC IIi User's Manual", 46 * https://web.archive.org/web/20030403110020/http://www.sun.com/processors/manuals/805-0087.pdf 47 */ 48 49 #define PBM_PCI_IMR_MASK 0x7fffffff 50 #define PBM_PCI_IMR_ENABLED 0x80000000 51 52 #define POR (1U << 31) 53 #define SOFT_POR (1U << 30) 54 #define SOFT_XIR (1U << 29) 55 #define BTN_POR (1U << 28) 56 #define BTN_XIR (1U << 27) 57 #define RESET_MASK 0xf8000000 58 #define RESET_WCMASK 0x98000000 59 #define RESET_WMASK 0x60000000 60 61 #define NO_IRQ_REQUEST (MAX_IVEC + 1) 62 63 static inline void sabre_set_request(SabreState *s, unsigned int irq_num) 64 { 65 trace_sabre_set_request(irq_num); 66 s->irq_request = irq_num; 67 qemu_set_irq(s->ivec_irqs[irq_num], 1); 68 } 69 70 static inline void sabre_check_irqs(SabreState *s) 71 { 72 unsigned int i; 73 74 /* Previous request is not acknowledged, resubmit */ 75 if (s->irq_request != NO_IRQ_REQUEST) { 76 sabre_set_request(s, s->irq_request); 77 return; 78 } 79 /* no request pending */ 80 if (s->pci_irq_in == 0ULL) { 81 return; 82 } 83 for (i = 0; i < 32; i++) { 84 if (s->pci_irq_in & (1ULL << i)) { 85 if (s->pci_irq_map[i >> 2] & PBM_PCI_IMR_ENABLED) { 86 sabre_set_request(s, i); 87 return; 88 } 89 } 90 } 91 for (i = 32; i < 64; i++) { 92 if (s->pci_irq_in & (1ULL << i)) { 93 if (s->obio_irq_map[i - 32] & PBM_PCI_IMR_ENABLED) { 94 sabre_set_request(s, i); 95 break; 96 } 97 } 98 } 99 } 100 101 static inline void sabre_clear_request(SabreState *s, unsigned int irq_num) 102 { 103 trace_sabre_clear_request(irq_num); 104 qemu_set_irq(s->ivec_irqs[irq_num], 0); 105 s->irq_request = NO_IRQ_REQUEST; 106 } 107 108 static AddressSpace *sabre_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 109 { 110 IOMMUState *is = opaque; 111 112 return &is->iommu_as; 113 } 114 115 static void sabre_config_write(void *opaque, hwaddr addr, 116 uint64_t val, unsigned size) 117 { 118 SabreState *s = opaque; 119 120 trace_sabre_config_write(addr, val); 121 122 switch (addr) { 123 case 0x30 ... 0x4f: /* DMA error registers */ 124 /* XXX: not implemented yet */ 125 break; 126 case 0xc00 ... 0xc3f: /* PCI interrupt control */ 127 if (addr & 4) { 128 unsigned int ino = (addr & 0x3f) >> 3; 129 s->pci_irq_map[ino] &= PBM_PCI_IMR_MASK; 130 s->pci_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; 131 if ((s->irq_request == ino) && !(val & ~PBM_PCI_IMR_MASK)) { 132 sabre_clear_request(s, ino); 133 } 134 sabre_check_irqs(s); 135 } 136 break; 137 case 0x1000 ... 0x107f: /* OBIO interrupt control */ 138 if (addr & 4) { 139 unsigned int ino = ((addr & 0xff) >> 3); 140 s->obio_irq_map[ino] &= PBM_PCI_IMR_MASK; 141 s->obio_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; 142 if ((s->irq_request == (ino | 0x20)) 143 && !(val & ~PBM_PCI_IMR_MASK)) { 144 sabre_clear_request(s, ino | 0x20); 145 } 146 sabre_check_irqs(s); 147 } 148 break; 149 case 0x1400 ... 0x14ff: /* PCI interrupt clear */ 150 if (addr & 4) { 151 unsigned int ino = (addr & 0xff) >> 5; 152 if ((s->irq_request / 4) == ino) { 153 sabre_clear_request(s, s->irq_request); 154 sabre_check_irqs(s); 155 } 156 } 157 break; 158 case 0x1800 ... 0x1860: /* OBIO interrupt clear */ 159 if (addr & 4) { 160 unsigned int ino = ((addr & 0xff) >> 3) | 0x20; 161 if (s->irq_request == ino) { 162 sabre_clear_request(s, ino); 163 sabre_check_irqs(s); 164 } 165 } 166 break; 167 case 0x2000 ... 0x202f: /* PCI control */ 168 s->pci_control[(addr & 0x3f) >> 2] = val; 169 break; 170 case 0xf020 ... 0xf027: /* Reset control */ 171 if (addr & 4) { 172 val &= RESET_MASK; 173 s->reset_control &= ~(val & RESET_WCMASK); 174 s->reset_control |= val & RESET_WMASK; 175 if (val & SOFT_POR) { 176 s->nr_resets = 0; 177 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 178 } else if (val & SOFT_XIR) { 179 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 180 } 181 } 182 break; 183 case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ 184 case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ 185 case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ 186 case 0xf000 ... 0xf01f: /* FFB config, memory control */ 187 /* we don't care */ 188 default: 189 break; 190 } 191 } 192 193 static uint64_t sabre_config_read(void *opaque, 194 hwaddr addr, unsigned size) 195 { 196 SabreState *s = opaque; 197 uint32_t val = 0; 198 199 switch (addr) { 200 case 0x30 ... 0x4f: /* DMA error registers */ 201 /* XXX: not implemented yet */ 202 break; 203 case 0xc00 ... 0xc3f: /* PCI interrupt control */ 204 if (addr & 4) { 205 val = s->pci_irq_map[(addr & 0x3f) >> 3]; 206 } 207 break; 208 case 0x1000 ... 0x107f: /* OBIO interrupt control */ 209 if (addr & 4) { 210 val = s->obio_irq_map[(addr & 0xff) >> 3]; 211 } 212 break; 213 case 0x1080 ... 0x108f: /* PCI bus error */ 214 if (addr & 4) { 215 val = s->pci_err_irq_map[(addr & 0xf) >> 3]; 216 } 217 break; 218 case 0x2000 ... 0x202f: /* PCI control */ 219 val = s->pci_control[(addr & 0x3f) >> 2]; 220 break; 221 case 0xf020 ... 0xf027: /* Reset control */ 222 if (addr & 4) { 223 val = s->reset_control; 224 } 225 break; 226 case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ 227 case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ 228 case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ 229 case 0xf000 ... 0xf01f: /* FFB config, memory control */ 230 /* we don't care */ 231 default: 232 break; 233 } 234 trace_sabre_config_read(addr, val); 235 236 return val; 237 } 238 239 static const MemoryRegionOps sabre_config_ops = { 240 .read = sabre_config_read, 241 .write = sabre_config_write, 242 .endianness = DEVICE_BIG_ENDIAN, 243 }; 244 245 static void sabre_pci_config_write(void *opaque, hwaddr addr, 246 uint64_t val, unsigned size) 247 { 248 SabreState *s = opaque; 249 PCIHostState *phb = PCI_HOST_BRIDGE(s); 250 251 trace_sabre_pci_config_write(addr, val); 252 pci_data_write(phb->bus, addr, val, size); 253 } 254 255 static uint64_t sabre_pci_config_read(void *opaque, hwaddr addr, 256 unsigned size) 257 { 258 uint32_t ret; 259 SabreState *s = opaque; 260 PCIHostState *phb = PCI_HOST_BRIDGE(s); 261 262 ret = pci_data_read(phb->bus, addr, size); 263 trace_sabre_pci_config_read(addr, ret); 264 return ret; 265 } 266 267 /* The sabre host has an IRQ line for each IRQ line of each slot. */ 268 static int pci_sabre_map_irq(PCIDevice *pci_dev, int irq_num) 269 { 270 /* Return the irq as swizzled by the PBM */ 271 return irq_num; 272 } 273 274 static int pci_simbaA_map_irq(PCIDevice *pci_dev, int irq_num) 275 { 276 /* The on-board devices have fixed (legacy) OBIO intnos */ 277 switch (PCI_SLOT(pci_dev->devfn)) { 278 case 1: 279 /* Onboard NIC */ 280 return OBIO_NIC_IRQ; 281 case 3: 282 /* Onboard IDE */ 283 return OBIO_HDD_IRQ; 284 default: 285 /* Normal intno, fall through */ 286 break; 287 } 288 289 return ((PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; 290 } 291 292 static int pci_simbaB_map_irq(PCIDevice *pci_dev, int irq_num) 293 { 294 return (0x10 + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; 295 } 296 297 static void pci_sabre_set_irq(void *opaque, int irq_num, int level) 298 { 299 SabreState *s = opaque; 300 301 trace_sabre_pci_set_irq(irq_num, level); 302 303 /* PCI IRQ map onto the first 32 INO. */ 304 if (irq_num < 32) { 305 if (level) { 306 s->pci_irq_in |= 1ULL << irq_num; 307 if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) { 308 sabre_set_request(s, irq_num); 309 } 310 } else { 311 s->pci_irq_in &= ~(1ULL << irq_num); 312 } 313 } else { 314 /* OBIO IRQ map onto the next 32 INO. */ 315 if (level) { 316 trace_sabre_pci_set_obio_irq(irq_num, level); 317 s->pci_irq_in |= 1ULL << irq_num; 318 if ((s->irq_request == NO_IRQ_REQUEST) 319 && (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED)) { 320 sabre_set_request(s, irq_num); 321 } 322 } else { 323 s->pci_irq_in &= ~(1ULL << irq_num); 324 } 325 } 326 } 327 328 static void sabre_reset(DeviceState *d) 329 { 330 SabreState *s = SABRE(d); 331 PCIDevice *pci_dev; 332 unsigned int i; 333 uint16_t cmd; 334 335 for (i = 0; i < 8; i++) { 336 s->pci_irq_map[i] &= PBM_PCI_IMR_MASK; 337 } 338 for (i = 0; i < 32; i++) { 339 s->obio_irq_map[i] &= PBM_PCI_IMR_MASK; 340 } 341 342 s->irq_request = NO_IRQ_REQUEST; 343 s->pci_irq_in = 0ULL; 344 345 if (s->nr_resets++ == 0) { 346 /* Power on reset */ 347 s->reset_control = POR; 348 } 349 350 /* As this is the busA PCI bridge which contains the on-board devices 351 * attached to the ebus, ensure that we initially allow IO transactions 352 * so that we get the early serial console until OpenBIOS can properly 353 * configure the PCI bridge itself */ 354 pci_dev = PCI_DEVICE(s->bridgeA); 355 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 356 pci_set_word(pci_dev->config + PCI_COMMAND, cmd | PCI_COMMAND_IO); 357 pci_bridge_update_mappings(PCI_BRIDGE(pci_dev)); 358 } 359 360 static const MemoryRegionOps pci_config_ops = { 361 .read = sabre_pci_config_read, 362 .write = sabre_pci_config_write, 363 .endianness = DEVICE_LITTLE_ENDIAN, 364 }; 365 366 static void sabre_realize(DeviceState *dev, Error **errp) 367 { 368 SabreState *s = SABRE(dev); 369 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 370 PCIDevice *pci_dev; 371 372 memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL); 373 memory_region_add_subregion(get_system_memory(), s->mem_base, 374 &s->pci_mmio); 375 376 phb->bus = pci_register_root_bus(dev, "pci", 377 pci_sabre_set_irq, pci_sabre_map_irq, s, 378 &s->pci_mmio, 379 &s->pci_ioport, 380 0, 0x40, TYPE_PCI_BUS); 381 382 pci_create_simple(phb->bus, 0, TYPE_SABRE_PCI_DEVICE); 383 384 /* IOMMU */ 385 memory_region_add_subregion_overlap(&s->sabre_config, 0x200, 386 sysbus_mmio_get_region(SYS_BUS_DEVICE(s->iommu), 0), 1); 387 pci_setup_iommu(phb->bus, sabre_pci_dma_iommu, s->iommu); 388 389 /* APB secondary busses */ 390 pci_dev = pci_new_multifunction(PCI_DEVFN(1, 0), TYPE_SIMBA_PCI_BRIDGE); 391 s->bridgeB = PCI_BRIDGE(pci_dev); 392 pci_bridge_map_irq(s->bridgeB, "pciB", pci_simbaB_map_irq); 393 pci_realize_and_unref(pci_dev, phb->bus, &error_fatal); 394 395 pci_dev = pci_new_multifunction(PCI_DEVFN(1, 1), TYPE_SIMBA_PCI_BRIDGE); 396 s->bridgeA = PCI_BRIDGE(pci_dev); 397 pci_bridge_map_irq(s->bridgeA, "pciA", pci_simbaA_map_irq); 398 pci_realize_and_unref(pci_dev, phb->bus, &error_fatal); 399 } 400 401 static void sabre_init(Object *obj) 402 { 403 SabreState *s = SABRE(obj); 404 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 405 unsigned int i; 406 407 for (i = 0; i < 8; i++) { 408 s->pci_irq_map[i] = (0x1f << 6) | (i << 2); 409 } 410 for (i = 0; i < 2; i++) { 411 s->pci_err_irq_map[i] = (0x1f << 6) | 0x30; 412 } 413 for (i = 0; i < 32; i++) { 414 s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i; 415 } 416 qdev_init_gpio_in_named(DEVICE(s), pci_sabre_set_irq, "pbm-irq", MAX_IVEC); 417 qdev_init_gpio_out_named(DEVICE(s), s->ivec_irqs, "ivec-irq", MAX_IVEC); 418 s->irq_request = NO_IRQ_REQUEST; 419 s->pci_irq_in = 0ULL; 420 421 /* IOMMU */ 422 object_property_add_link(obj, "iommu", TYPE_SUN4U_IOMMU, 423 (Object **) &s->iommu, 424 qdev_prop_allow_set_link_before_realize, 425 0); 426 427 /* sabre_config */ 428 memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s, 429 "sabre-config", 0x10000); 430 /* at region 0 */ 431 sysbus_init_mmio(sbd, &s->sabre_config); 432 433 memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s, 434 "sabre-pci-config", 0x1000000); 435 /* at region 1 */ 436 sysbus_init_mmio(sbd, &s->pci_config); 437 438 /* pci_ioport */ 439 memory_region_init(&s->pci_ioport, OBJECT(s), "sabre-pci-ioport", 440 0x1000000); 441 442 /* at region 2 */ 443 sysbus_init_mmio(sbd, &s->pci_ioport); 444 } 445 446 static void sabre_pci_realize(PCIDevice *d, Error **errp) 447 { 448 pci_set_word(d->config + PCI_COMMAND, 449 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 450 pci_set_word(d->config + PCI_STATUS, 451 PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ | 452 PCI_STATUS_DEVSEL_MEDIUM); 453 } 454 455 static void sabre_pci_class_init(ObjectClass *klass, void *data) 456 { 457 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 458 DeviceClass *dc = DEVICE_CLASS(klass); 459 460 k->realize = sabre_pci_realize; 461 k->vendor_id = PCI_VENDOR_ID_SUN; 462 k->device_id = PCI_DEVICE_ID_SUN_SABRE; 463 k->class_id = PCI_CLASS_BRIDGE_HOST; 464 /* 465 * PCI-facing part of the host bridge, not usable without the 466 * host-facing part, which can't be device_add'ed, yet. 467 */ 468 dc->user_creatable = false; 469 } 470 471 static const TypeInfo sabre_pci_info = { 472 .name = TYPE_SABRE_PCI_DEVICE, 473 .parent = TYPE_PCI_DEVICE, 474 .instance_size = sizeof(SabrePCIState), 475 .class_init = sabre_pci_class_init, 476 .interfaces = (InterfaceInfo[]) { 477 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 478 { }, 479 }, 480 }; 481 482 static char *sabre_ofw_unit_address(const SysBusDevice *dev) 483 { 484 SabreState *s = SABRE(dev); 485 486 return g_strdup_printf("%x,%x", 487 (uint32_t)((s->special_base >> 32) & 0xffffffff), 488 (uint32_t)(s->special_base & 0xffffffff)); 489 } 490 491 static Property sabre_properties[] = { 492 DEFINE_PROP_UINT64("special-base", SabreState, special_base, 0), 493 DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0), 494 DEFINE_PROP_END_OF_LIST(), 495 }; 496 497 static void sabre_class_init(ObjectClass *klass, void *data) 498 { 499 DeviceClass *dc = DEVICE_CLASS(klass); 500 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass); 501 502 dc->realize = sabre_realize; 503 dc->reset = sabre_reset; 504 device_class_set_props(dc, sabre_properties); 505 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 506 dc->fw_name = "pci"; 507 sbc->explicit_ofw_unit_address = sabre_ofw_unit_address; 508 } 509 510 static const TypeInfo sabre_info = { 511 .name = TYPE_SABRE, 512 .parent = TYPE_PCI_HOST_BRIDGE, 513 .instance_size = sizeof(SabreState), 514 .instance_init = sabre_init, 515 .class_init = sabre_class_init, 516 }; 517 518 static void sabre_register_types(void) 519 { 520 type_register_static(&sabre_info); 521 type_register_static(&sabre_pci_info); 522 } 523 524 type_init(sabre_register_types) 525