1 /* 2 * HP-PARISC Dino PCI chipset emulation, as in B160L and similar machines 3 * 4 * (C) 2017-2019 by Helge Deller <deller@gmx.de> 5 * 6 * This work is licensed under the GNU GPL license version 2 or later. 7 * 8 * Documentation available at: 9 * https://parisc.wiki.kernel.org/images-parisc/9/91/Dino_ers.pdf 10 * https://parisc.wiki.kernel.org/images-parisc/7/70/Dino_3_1_Errata.pdf 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qemu/module.h" 15 #include "qemu/units.h" 16 #include "qapi/error.h" 17 #include "hw/irq.h" 18 #include "hw/pci/pci_device.h" 19 #include "hw/pci/pci_bus.h" 20 #include "hw/qdev-properties.h" 21 #include "hw/pci-host/dino.h" 22 #include "migration/vmstate.h" 23 #include "trace.h" 24 #include "qom/object.h" 25 26 27 /* 28 * Dino can forward memory accesses from the CPU in the range between 29 * 0xf0800000 and 0xff000000 to the PCI bus. 30 */ 31 static void gsc_to_pci_forwarding(DinoState *s) 32 { 33 uint32_t io_addr_en, tmp; 34 int enabled, i; 35 36 tmp = extract32(s->io_control, 7, 2); 37 enabled = (tmp == 0x01); 38 io_addr_en = s->io_addr_en; 39 /* Mask out first (=firmware) and last (=Dino) areas. */ 40 io_addr_en &= ~(BIT(31) | BIT(0)); 41 42 memory_region_transaction_begin(); 43 for (i = 1; i < 31; i++) { 44 MemoryRegion *mem = &s->pci_mem_alias[i]; 45 if (enabled && (io_addr_en & (1U << i))) { 46 if (!memory_region_is_mapped(mem)) { 47 uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; 48 memory_region_add_subregion(get_system_memory(), addr, mem); 49 } 50 } else if (memory_region_is_mapped(mem)) { 51 memory_region_del_subregion(get_system_memory(), mem); 52 } 53 } 54 memory_region_transaction_commit(); 55 } 56 57 static bool dino_chip_mem_valid(void *opaque, hwaddr addr, 58 unsigned size, bool is_write, 59 MemTxAttrs attrs) 60 { 61 bool ret = false; 62 63 switch (addr) { 64 case DINO_IAR0: 65 case DINO_IAR1: 66 case DINO_IRR0: 67 case DINO_IRR1: 68 case DINO_IMR: 69 case DINO_IPR: 70 case DINO_ICR: 71 case DINO_ILR: 72 case DINO_IO_CONTROL: 73 case DINO_IO_FBB_EN: 74 case DINO_IO_ADDR_EN: 75 case DINO_PCI_IO_DATA: 76 case DINO_TOC_ADDR: 77 case DINO_GMASK ... DINO_PCISTS: 78 case DINO_MLTIM ... DINO_PCIWOR: 79 case DINO_TLTIM: 80 ret = true; 81 break; 82 case DINO_PCI_IO_DATA + 2: 83 ret = (size <= 2); 84 break; 85 case DINO_PCI_IO_DATA + 1: 86 case DINO_PCI_IO_DATA + 3: 87 ret = (size == 1); 88 } 89 trace_dino_chip_mem_valid(addr, ret); 90 return ret; 91 } 92 93 static MemTxResult dino_chip_read_with_attrs(void *opaque, hwaddr addr, 94 uint64_t *data, unsigned size, 95 MemTxAttrs attrs) 96 { 97 DinoState *s = opaque; 98 PCIHostState *phb = PCI_HOST_BRIDGE(s); 99 MemTxResult ret = MEMTX_OK; 100 AddressSpace *io; 101 uint16_t ioaddr; 102 uint32_t val; 103 104 switch (addr) { 105 case DINO_PCI_IO_DATA ... DINO_PCI_IO_DATA + 3: 106 /* Read from PCI IO space. */ 107 io = &address_space_io; 108 ioaddr = phb->config_reg + (addr & 3); 109 switch (size) { 110 case 1: 111 val = address_space_ldub(io, ioaddr, attrs, &ret); 112 break; 113 case 2: 114 val = address_space_lduw_be(io, ioaddr, attrs, &ret); 115 break; 116 case 4: 117 val = address_space_ldl_be(io, ioaddr, attrs, &ret); 118 break; 119 default: 120 g_assert_not_reached(); 121 } 122 break; 123 124 case DINO_IO_FBB_EN: 125 val = s->io_fbb_en; 126 break; 127 case DINO_IO_ADDR_EN: 128 val = s->io_addr_en; 129 break; 130 case DINO_IO_CONTROL: 131 val = s->io_control; 132 break; 133 134 case DINO_IAR0: 135 val = s->iar0; 136 break; 137 case DINO_IAR1: 138 val = s->iar1; 139 break; 140 case DINO_IMR: 141 val = s->imr; 142 break; 143 case DINO_ICR: 144 val = s->icr; 145 break; 146 case DINO_IPR: 147 val = s->ipr; 148 /* Any read to IPR clears the register. */ 149 s->ipr = 0; 150 break; 151 case DINO_ILR: 152 val = s->ilr; 153 break; 154 case DINO_IRR0: 155 val = s->ilr & s->imr & ~s->icr; 156 break; 157 case DINO_IRR1: 158 val = s->ilr & s->imr & s->icr; 159 break; 160 case DINO_TOC_ADDR: 161 val = s->toc_addr; 162 break; 163 case DINO_GMASK ... DINO_TLTIM: 164 val = s->reg800[(addr - DINO_GMASK) / 4]; 165 if (addr == DINO_PAMR) { 166 val &= ~0x01; /* LSB is hardwired to 0 */ 167 } 168 if (addr == DINO_MLTIM) { 169 val &= ~0x07; /* 3 LSB are hardwired to 0 */ 170 } 171 if (addr == DINO_BRDG_FEAT) { 172 val &= ~(0x10710E0ul | 8); /* bits 5-7, 24 & 15 reserved */ 173 } 174 break; 175 176 default: 177 /* Controlled by dino_chip_mem_valid above. */ 178 g_assert_not_reached(); 179 } 180 181 trace_dino_chip_read(addr, val); 182 *data = val; 183 return ret; 184 } 185 186 static MemTxResult dino_chip_write_with_attrs(void *opaque, hwaddr addr, 187 uint64_t val, unsigned size, 188 MemTxAttrs attrs) 189 { 190 DinoState *s = opaque; 191 PCIHostState *phb = PCI_HOST_BRIDGE(s); 192 AddressSpace *io; 193 MemTxResult ret; 194 uint16_t ioaddr; 195 int i; 196 197 trace_dino_chip_write(addr, val); 198 199 switch (addr) { 200 case DINO_IO_DATA ... DINO_PCI_IO_DATA + 3: 201 /* Write into PCI IO space. */ 202 io = &address_space_io; 203 ioaddr = phb->config_reg + (addr & 3); 204 switch (size) { 205 case 1: 206 address_space_stb(io, ioaddr, val, attrs, &ret); 207 break; 208 case 2: 209 address_space_stw_be(io, ioaddr, val, attrs, &ret); 210 break; 211 case 4: 212 address_space_stl_be(io, ioaddr, val, attrs, &ret); 213 break; 214 default: 215 g_assert_not_reached(); 216 } 217 return ret; 218 219 case DINO_IO_FBB_EN: 220 s->io_fbb_en = val & 0x03; 221 break; 222 case DINO_IO_ADDR_EN: 223 s->io_addr_en = val; 224 gsc_to_pci_forwarding(s); 225 break; 226 case DINO_IO_CONTROL: 227 s->io_control = val; 228 gsc_to_pci_forwarding(s); 229 break; 230 231 case DINO_IAR0: 232 s->iar0 = val; 233 break; 234 case DINO_IAR1: 235 s->iar1 = val; 236 break; 237 case DINO_IMR: 238 s->imr = val; 239 break; 240 case DINO_ICR: 241 s->icr = val; 242 break; 243 case DINO_IPR: 244 /* Any write to IPR clears the register. */ 245 s->ipr = 0; 246 break; 247 case DINO_TOC_ADDR: 248 /* IO_COMMAND of CPU with client_id bits */ 249 s->toc_addr = 0xFFFA0030 | (val & 0x1e000); 250 break; 251 252 case DINO_ILR: 253 case DINO_IRR0: 254 case DINO_IRR1: 255 /* These registers are read-only. */ 256 break; 257 258 case DINO_GMASK ... DINO_TLTIM: 259 i = (addr - DINO_GMASK) / 4; 260 val &= reg800_keep_bits[i]; 261 s->reg800[i] = val; 262 break; 263 264 default: 265 /* Controlled by dino_chip_mem_valid above. */ 266 g_assert_not_reached(); 267 } 268 return MEMTX_OK; 269 } 270 271 static const MemoryRegionOps dino_chip_ops = { 272 .read_with_attrs = dino_chip_read_with_attrs, 273 .write_with_attrs = dino_chip_write_with_attrs, 274 .endianness = DEVICE_BIG_ENDIAN, 275 .valid = { 276 .min_access_size = 1, 277 .max_access_size = 4, 278 .accepts = dino_chip_mem_valid, 279 }, 280 .impl = { 281 .min_access_size = 1, 282 .max_access_size = 4, 283 }, 284 }; 285 286 static const VMStateDescription vmstate_dino = { 287 .name = "Dino", 288 .version_id = 2, 289 .minimum_version_id = 1, 290 .fields = (const VMStateField[]) { 291 VMSTATE_UINT32(iar0, DinoState), 292 VMSTATE_UINT32(iar1, DinoState), 293 VMSTATE_UINT32(imr, DinoState), 294 VMSTATE_UINT32(ipr, DinoState), 295 VMSTATE_UINT32(icr, DinoState), 296 VMSTATE_UINT32(ilr, DinoState), 297 VMSTATE_UINT32(io_fbb_en, DinoState), 298 VMSTATE_UINT32(io_addr_en, DinoState), 299 VMSTATE_UINT32(io_control, DinoState), 300 VMSTATE_UINT32(toc_addr, DinoState), 301 VMSTATE_END_OF_LIST() 302 } 303 }; 304 305 /* Unlike pci_config_data_le_ops, no check of high bit set in config_reg. */ 306 307 static uint64_t dino_config_data_read(void *opaque, hwaddr addr, unsigned len) 308 { 309 PCIHostState *s = opaque; 310 return pci_data_read(s->bus, s->config_reg | (addr & 3), len); 311 } 312 313 static void dino_config_data_write(void *opaque, hwaddr addr, 314 uint64_t val, unsigned len) 315 { 316 PCIHostState *s = opaque; 317 pci_data_write(s->bus, s->config_reg | (addr & 3), val, len); 318 } 319 320 static const MemoryRegionOps dino_config_data_ops = { 321 .read = dino_config_data_read, 322 .write = dino_config_data_write, 323 .endianness = DEVICE_LITTLE_ENDIAN, 324 }; 325 326 static uint64_t dino_config_addr_read(void *opaque, hwaddr addr, unsigned len) 327 { 328 DinoState *s = opaque; 329 return s->config_reg_dino; 330 } 331 332 static void dino_config_addr_write(void *opaque, hwaddr addr, 333 uint64_t val, unsigned len) 334 { 335 PCIHostState *s = opaque; 336 DinoState *ds = opaque; 337 ds->config_reg_dino = val; /* keep a copy of original value */ 338 s->config_reg = val & ~3U; 339 } 340 341 static const MemoryRegionOps dino_config_addr_ops = { 342 .read = dino_config_addr_read, 343 .write = dino_config_addr_write, 344 .valid.min_access_size = 4, 345 .valid.max_access_size = 4, 346 .endianness = DEVICE_BIG_ENDIAN, 347 }; 348 349 static AddressSpace *dino_pcihost_set_iommu(PCIBus *bus, void *opaque, 350 int devfn) 351 { 352 DinoState *s = opaque; 353 354 return &s->bm_as; 355 } 356 357 static const PCIIOMMUOps dino_iommu_ops = { 358 .get_address_space = dino_pcihost_set_iommu, 359 }; 360 361 /* 362 * Dino interrupts are connected as shown on Page 78, Table 23 363 * (Little-endian bit numbers) 364 * 0 PCI INTA 365 * 1 PCI INTB 366 * 2 PCI INTC 367 * 3 PCI INTD 368 * 4 PCI INTE 369 * 5 PCI INTF 370 * 6 GSC External Interrupt 371 * 7 Bus Error for "less than fatal" mode 372 * 8 PS2 373 * 9 Unused 374 * 10 RS232 375 */ 376 377 static void dino_set_irq(void *opaque, int irq, int level) 378 { 379 DinoState *s = opaque; 380 uint32_t bit = 1u << irq; 381 uint32_t old_ilr = s->ilr; 382 383 if (level) { 384 uint32_t ena = bit & ~old_ilr; 385 s->ipr |= ena; 386 s->ilr = old_ilr | bit; 387 if (ena & s->imr) { 388 uint32_t iar = (ena & s->icr ? s->iar1 : s->iar0); 389 stl_be_phys(&address_space_memory, iar & -32, iar & 31); 390 } 391 } else { 392 s->ilr = old_ilr & ~bit; 393 } 394 } 395 396 static int dino_pci_map_irq(PCIDevice *d, int irq_num) 397 { 398 int slot = PCI_SLOT(d->devfn); 399 400 assert(irq_num >= 0 && irq_num <= 3); 401 402 return slot & 0x03; 403 } 404 405 static void dino_pcihost_reset(DeviceState *dev) 406 { 407 DinoState *s = DINO_PCI_HOST_BRIDGE(dev); 408 409 s->iar0 = s->iar1 = 0xFFFB0000 + 3; /* CPU_HPA + 3 */ 410 s->toc_addr = 0xFFFA0030; /* IO_COMMAND of CPU */ 411 } 412 413 static void dino_pcihost_realize(DeviceState *dev, Error **errp) 414 { 415 DinoState *s = DINO_PCI_HOST_BRIDGE(dev); 416 417 /* Set up PCI view of memory: Bus master address space. */ 418 memory_region_init(&s->bm, OBJECT(s), "bm-dino", 4 * GiB); 419 memory_region_init_alias(&s->bm_ram_alias, OBJECT(s), 420 "bm-system", s->memory_as, 0, 421 0xf0000000 + DINO_MEM_CHUNK_SIZE); 422 memory_region_init_alias(&s->bm_pci_alias, OBJECT(s), 423 "bm-pci", &s->pci_mem, 424 0xf0000000 + DINO_MEM_CHUNK_SIZE, 425 30 * DINO_MEM_CHUNK_SIZE); 426 memory_region_init_alias(&s->bm_cpu_alias, OBJECT(s), 427 "bm-cpu", s->memory_as, 0xfff00000, 428 0xfffff); 429 memory_region_add_subregion(&s->bm, 0, 430 &s->bm_ram_alias); 431 memory_region_add_subregion(&s->bm, 432 0xf0000000 + DINO_MEM_CHUNK_SIZE, 433 &s->bm_pci_alias); 434 memory_region_add_subregion(&s->bm, 0xfff00000, 435 &s->bm_cpu_alias); 436 437 address_space_init(&s->bm_as, &s->bm, "pci-bm"); 438 } 439 440 static void dino_pcihost_unrealize(DeviceState *dev) 441 { 442 DinoState *s = DINO_PCI_HOST_BRIDGE(dev); 443 444 address_space_destroy(&s->bm_as); 445 } 446 447 static void dino_pcihost_init(Object *obj) 448 { 449 DinoState *s = DINO_PCI_HOST_BRIDGE(obj); 450 PCIHostState *phb = PCI_HOST_BRIDGE(obj); 451 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 452 int i; 453 454 /* Dino PCI access from main memory. */ 455 memory_region_init_io(&s->this_mem, OBJECT(s), &dino_chip_ops, 456 s, "dino", 4096); 457 458 /* Dino PCI config. */ 459 memory_region_init_io(&phb->conf_mem, OBJECT(phb), 460 &dino_config_addr_ops, DEVICE(s), 461 "pci-conf-idx", 4); 462 memory_region_init_io(&phb->data_mem, OBJECT(phb), 463 &dino_config_data_ops, DEVICE(s), 464 "pci-conf-data", 4); 465 memory_region_add_subregion(&s->this_mem, DINO_PCI_CONFIG_ADDR, 466 &phb->conf_mem); 467 memory_region_add_subregion(&s->this_mem, DINO_CONFIG_DATA, 468 &phb->data_mem); 469 470 /* Dino PCI bus memory. */ 471 memory_region_init(&s->pci_mem, OBJECT(s), "pci-memory", 4 * GiB); 472 473 phb->bus = pci_register_root_bus(DEVICE(s), "pci", 474 dino_set_irq, dino_pci_map_irq, s, 475 &s->pci_mem, get_system_io(), 476 PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS); 477 478 /* Set up windows into PCI bus memory. */ 479 for (i = 1; i < 31; i++) { 480 uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; 481 char *name = g_strdup_printf("PCI Outbound Window %d", i); 482 memory_region_init_alias(&s->pci_mem_alias[i], OBJECT(s), 483 name, &s->pci_mem, addr, 484 DINO_MEM_CHUNK_SIZE); 485 g_free(name); 486 } 487 488 pci_setup_iommu(phb->bus, &dino_iommu_ops, s); 489 490 sysbus_init_mmio(sbd, &s->this_mem); 491 492 qdev_init_gpio_in(DEVICE(obj), dino_set_irq, DINO_IRQS); 493 } 494 495 static Property dino_pcihost_properties[] = { 496 DEFINE_PROP_LINK("memory-as", DinoState, memory_as, TYPE_MEMORY_REGION, 497 MemoryRegion *), 498 DEFINE_PROP_END_OF_LIST(), 499 }; 500 501 static void dino_pcihost_class_init(ObjectClass *klass, void *data) 502 { 503 DeviceClass *dc = DEVICE_CLASS(klass); 504 505 dc->reset = dino_pcihost_reset; 506 dc->realize = dino_pcihost_realize; 507 dc->unrealize = dino_pcihost_unrealize; 508 device_class_set_props(dc, dino_pcihost_properties); 509 dc->vmsd = &vmstate_dino; 510 } 511 512 static const TypeInfo dino_pcihost_info = { 513 .name = TYPE_DINO_PCI_HOST_BRIDGE, 514 .parent = TYPE_PCI_HOST_BRIDGE, 515 .instance_init = dino_pcihost_init, 516 .instance_size = sizeof(DinoState), 517 .class_init = dino_pcihost_class_init, 518 }; 519 520 static void dino_register_types(void) 521 { 522 type_register_static(&dino_pcihost_info); 523 } 524 525 type_init(dino_register_types) 526