1 /* 2 * QEMU MCH/ICH9 PCI Bridge Emulation 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * Copyright (c) 2009, 2010, 2011 6 * Isaku Yamahata <yamahata at valinux co jp> 7 * VA Linux Systems Japan K.K. 8 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> 9 * 10 * This is based on piix.c, but heavily modified. 11 * 12 * Permission is hereby granted, free of charge, to any person obtaining a copy 13 * of this software and associated documentation files (the "Software"), to deal 14 * in the Software without restriction, including without limitation the rights 15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 16 * copies of the Software, and to permit persons to whom the Software is 17 * furnished to do so, subject to the following conditions: 18 * 19 * The above copyright notice and this permission notice shall be included in 20 * all copies or substantial portions of the Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 28 * THE SOFTWARE. 29 */ 30 31 #include "qemu/osdep.h" 32 #include "hw/i386/pc.h" 33 #include "hw/pci-host/q35.h" 34 #include "hw/qdev-properties.h" 35 #include "migration/vmstate.h" 36 #include "qapi/error.h" 37 #include "qapi/visitor.h" 38 #include "qemu/module.h" 39 40 /**************************************************************************** 41 * Q35 host 42 */ 43 44 #define Q35_PCI_HOST_HOLE64_SIZE_DEFAULT (1ULL << 35) 45 46 static void q35_host_realize(DeviceState *dev, Error **errp) 47 { 48 PCIHostState *pci = PCI_HOST_BRIDGE(dev); 49 Q35PCIHost *s = Q35_HOST_DEVICE(dev); 50 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 51 52 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem); 53 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4); 54 55 sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem); 56 sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4); 57 58 /* register q35 0xcf8 port as coalesced pio */ 59 memory_region_set_flush_coalesced(&pci->data_mem); 60 memory_region_add_coalescing(&pci->conf_mem, 0, 4); 61 62 pci->bus = pci_root_bus_new(DEVICE(s), "pcie.0", 63 s->mch.pci_address_space, 64 s->mch.address_space_io, 65 0, TYPE_PCIE_BUS); 66 PC_MACHINE(qdev_get_machine())->bus = pci->bus; 67 qdev_realize(DEVICE(&s->mch), BUS(pci->bus), &error_fatal); 68 } 69 70 static const char *q35_host_root_bus_path(PCIHostState *host_bridge, 71 PCIBus *rootbus) 72 { 73 Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge); 74 75 /* For backwards compat with old device paths */ 76 if (s->mch.short_root_bus) { 77 return "0000"; 78 } 79 return "0000:00"; 80 } 81 82 static void q35_host_get_pci_hole_start(Object *obj, Visitor *v, 83 const char *name, void *opaque, 84 Error **errp) 85 { 86 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 87 uint64_t val64; 88 uint32_t value; 89 90 val64 = range_is_empty(&s->mch.pci_hole) 91 ? 0 : range_lob(&s->mch.pci_hole); 92 value = val64; 93 assert(value == val64); 94 visit_type_uint32(v, name, &value, errp); 95 } 96 97 static void q35_host_get_pci_hole_end(Object *obj, Visitor *v, 98 const char *name, void *opaque, 99 Error **errp) 100 { 101 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 102 uint64_t val64; 103 uint32_t value; 104 105 val64 = range_is_empty(&s->mch.pci_hole) 106 ? 0 : range_upb(&s->mch.pci_hole) + 1; 107 value = val64; 108 assert(value == val64); 109 visit_type_uint32(v, name, &value, errp); 110 } 111 112 /* 113 * The 64bit PCI hole start is set by the Guest firmware 114 * as the address of the first 64bit PCI MEM resource. 115 * If no PCI device has resources on the 64bit area, 116 * the 64bit PCI hole will start after "over 4G RAM" and the 117 * reserved space for memory hotplug if any. 118 */ 119 static uint64_t q35_host_get_pci_hole64_start_value(Object *obj) 120 { 121 PCIHostState *h = PCI_HOST_BRIDGE(obj); 122 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 123 Range w64; 124 uint64_t value; 125 126 pci_bus_get_w64_range(h->bus, &w64); 127 value = range_is_empty(&w64) ? 0 : range_lob(&w64); 128 if (!value && s->pci_hole64_fix) { 129 value = pc_pci_hole64_start(); 130 } 131 return value; 132 } 133 134 static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v, 135 const char *name, void *opaque, 136 Error **errp) 137 { 138 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 139 140 visit_type_uint64(v, name, &hole64_start, errp); 141 } 142 143 /* 144 * The 64bit PCI hole end is set by the Guest firmware 145 * as the address of the last 64bit PCI MEM resource. 146 * Then it is expanded to the PCI_HOST_PROP_PCI_HOLE64_SIZE 147 * that can be configured by the user. 148 */ 149 static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v, 150 const char *name, void *opaque, 151 Error **errp) 152 { 153 PCIHostState *h = PCI_HOST_BRIDGE(obj); 154 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 155 uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); 156 Range w64; 157 uint64_t value, hole64_end; 158 159 pci_bus_get_w64_range(h->bus, &w64); 160 value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; 161 hole64_end = ROUND_UP(hole64_start + s->mch.pci_hole64_size, 1ULL << 30); 162 if (s->pci_hole64_fix && value < hole64_end) { 163 value = hole64_end; 164 } 165 visit_type_uint64(v, name, &value, errp); 166 } 167 168 /* 169 * NOTE: setting defaults for the mch.* fields in this table 170 * doesn't work, because mch is a separate QOM object that is 171 * zeroed by the object_initialize(&s->mch, ...) call inside 172 * q35_host_initfn(). The default values for those 173 * properties need to be initialized manually by 174 * q35_host_initfn() after the object_initialize() call. 175 */ 176 static Property q35_host_props[] = { 177 DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr, 178 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT), 179 DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost, 180 mch.pci_hole64_size, Q35_PCI_HOST_HOLE64_SIZE_DEFAULT), 181 DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0), 182 DEFINE_PROP_SIZE(PCI_HOST_BELOW_4G_MEM_SIZE, Q35PCIHost, 183 mch.below_4g_mem_size, 0), 184 DEFINE_PROP_SIZE(PCI_HOST_ABOVE_4G_MEM_SIZE, Q35PCIHost, 185 mch.above_4g_mem_size, 0), 186 DEFINE_PROP_BOOL("x-pci-hole64-fix", Q35PCIHost, pci_hole64_fix, true), 187 DEFINE_PROP_END_OF_LIST(), 188 }; 189 190 static void q35_host_class_init(ObjectClass *klass, void *data) 191 { 192 DeviceClass *dc = DEVICE_CLASS(klass); 193 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); 194 195 hc->root_bus_path = q35_host_root_bus_path; 196 dc->realize = q35_host_realize; 197 device_class_set_props(dc, q35_host_props); 198 /* Reason: needs to be wired up by pc_q35_init */ 199 dc->user_creatable = false; 200 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 201 dc->fw_name = "pci"; 202 } 203 204 static void q35_host_initfn(Object *obj) 205 { 206 Q35PCIHost *s = Q35_HOST_DEVICE(obj); 207 PCIHostState *phb = PCI_HOST_BRIDGE(obj); 208 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj); 209 210 memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb, 211 "pci-conf-idx", 4); 212 memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb, 213 "pci-conf-data", 4); 214 215 object_initialize_child(OBJECT(s), "mch", &s->mch, TYPE_MCH_PCI_DEVICE); 216 qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0)); 217 qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false); 218 /* mch's object_initialize resets the default value, set it again */ 219 qdev_prop_set_uint64(DEVICE(s), PCI_HOST_PROP_PCI_HOLE64_SIZE, 220 Q35_PCI_HOST_HOLE64_SIZE_DEFAULT); 221 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32", 222 q35_host_get_pci_hole_start, 223 NULL, NULL, NULL); 224 225 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32", 226 q35_host_get_pci_hole_end, 227 NULL, NULL, NULL); 228 229 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64", 230 q35_host_get_pci_hole64_start, 231 NULL, NULL, NULL); 232 233 object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64", 234 q35_host_get_pci_hole64_end, 235 NULL, NULL, NULL); 236 237 object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE, 238 &pehb->size, OBJ_PROP_FLAG_READ); 239 240 object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION, 241 (Object **) &s->mch.ram_memory, 242 qdev_prop_allow_set_link_before_realize, 0); 243 244 object_property_add_link(obj, MCH_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION, 245 (Object **) &s->mch.pci_address_space, 246 qdev_prop_allow_set_link_before_realize, 0); 247 248 object_property_add_link(obj, MCH_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION, 249 (Object **) &s->mch.system_memory, 250 qdev_prop_allow_set_link_before_realize, 0); 251 252 object_property_add_link(obj, MCH_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION, 253 (Object **) &s->mch.address_space_io, 254 qdev_prop_allow_set_link_before_realize, 0); 255 } 256 257 static const TypeInfo q35_host_info = { 258 .name = TYPE_Q35_HOST_DEVICE, 259 .parent = TYPE_PCIE_HOST_BRIDGE, 260 .instance_size = sizeof(Q35PCIHost), 261 .instance_init = q35_host_initfn, 262 .class_init = q35_host_class_init, 263 }; 264 265 /**************************************************************************** 266 * MCH D0:F0 267 */ 268 269 static uint64_t blackhole_read(void *ptr, hwaddr reg, unsigned size) 270 { 271 return 0xffffffff; 272 } 273 274 static void blackhole_write(void *opaque, hwaddr addr, uint64_t val, 275 unsigned width) 276 { 277 /* nothing */ 278 } 279 280 static const MemoryRegionOps blackhole_ops = { 281 .read = blackhole_read, 282 .write = blackhole_write, 283 .endianness = DEVICE_NATIVE_ENDIAN, 284 .valid.min_access_size = 1, 285 .valid.max_access_size = 4, 286 .impl.min_access_size = 4, 287 .impl.max_access_size = 4, 288 .endianness = DEVICE_LITTLE_ENDIAN, 289 }; 290 291 /* PCIe MMCFG */ 292 static void mch_update_pciexbar(MCHPCIState *mch) 293 { 294 PCIDevice *pci_dev = PCI_DEVICE(mch); 295 BusState *bus = qdev_get_parent_bus(DEVICE(mch)); 296 PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent); 297 298 uint64_t pciexbar; 299 int enable; 300 uint64_t addr; 301 uint64_t addr_mask; 302 uint32_t length; 303 304 pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR); 305 enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN; 306 addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK; 307 switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) { 308 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M: 309 length = 256 * 1024 * 1024; 310 break; 311 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M: 312 length = 128 * 1024 * 1024; 313 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK | 314 MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 315 break; 316 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M: 317 length = 64 * 1024 * 1024; 318 addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; 319 break; 320 case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD: 321 default: 322 abort(); 323 } 324 addr = pciexbar & addr_mask; 325 pcie_host_mmcfg_update(pehb, enable, addr, length); 326 } 327 328 /* PAM */ 329 static void mch_update_pam(MCHPCIState *mch) 330 { 331 PCIDevice *pd = PCI_DEVICE(mch); 332 int i; 333 334 memory_region_transaction_begin(); 335 for (i = 0; i < 13; i++) { 336 pam_update(&mch->pam_regions[i], i, 337 pd->config[MCH_HOST_BRIDGE_PAM0 + DIV_ROUND_UP(i, 2)]); 338 } 339 memory_region_transaction_commit(); 340 } 341 342 /* SMRAM */ 343 static void mch_update_smram(MCHPCIState *mch) 344 { 345 PCIDevice *pd = PCI_DEVICE(mch); 346 bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME); 347 uint32_t tseg_size; 348 349 /* implement SMRAM.D_LCK */ 350 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & MCH_HOST_BRIDGE_SMRAM_D_LCK) { 351 pd->config[MCH_HOST_BRIDGE_SMRAM] &= ~MCH_HOST_BRIDGE_SMRAM_D_OPEN; 352 pd->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK_LCK; 353 pd->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK_LCK; 354 } 355 356 memory_region_transaction_begin(); 357 358 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) { 359 /* Hide (!) low SMRAM if H_SMRAME = 1 */ 360 memory_region_set_enabled(&mch->smram_region, h_smrame); 361 /* Show high SMRAM if H_SMRAME = 1 */ 362 memory_region_set_enabled(&mch->open_high_smram, h_smrame); 363 } else { 364 /* Hide high SMRAM and low SMRAM */ 365 memory_region_set_enabled(&mch->smram_region, true); 366 memory_region_set_enabled(&mch->open_high_smram, false); 367 } 368 369 if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) { 370 memory_region_set_enabled(&mch->low_smram, !h_smrame); 371 memory_region_set_enabled(&mch->high_smram, h_smrame); 372 } else { 373 memory_region_set_enabled(&mch->low_smram, false); 374 memory_region_set_enabled(&mch->high_smram, false); 375 } 376 377 if (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_T_EN) { 378 switch (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & 379 MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) { 380 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB: 381 tseg_size = 1024 * 1024; 382 break; 383 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB: 384 tseg_size = 1024 * 1024 * 2; 385 break; 386 case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB: 387 tseg_size = 1024 * 1024 * 8; 388 break; 389 default: 390 tseg_size = 1024 * 1024 * (uint32_t)mch->ext_tseg_mbytes; 391 break; 392 } 393 } else { 394 tseg_size = 0; 395 } 396 memory_region_del_subregion(mch->system_memory, &mch->tseg_blackhole); 397 memory_region_set_enabled(&mch->tseg_blackhole, tseg_size); 398 memory_region_set_size(&mch->tseg_blackhole, tseg_size); 399 memory_region_add_subregion_overlap(mch->system_memory, 400 mch->below_4g_mem_size - tseg_size, 401 &mch->tseg_blackhole, 1); 402 403 memory_region_set_enabled(&mch->tseg_window, tseg_size); 404 memory_region_set_size(&mch->tseg_window, tseg_size); 405 memory_region_set_address(&mch->tseg_window, 406 mch->below_4g_mem_size - tseg_size); 407 memory_region_set_alias_offset(&mch->tseg_window, 408 mch->below_4g_mem_size - tseg_size); 409 410 memory_region_transaction_commit(); 411 } 412 413 static void mch_update_ext_tseg_mbytes(MCHPCIState *mch) 414 { 415 PCIDevice *pd = PCI_DEVICE(mch); 416 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES; 417 418 if (mch->ext_tseg_mbytes > 0 && 419 pci_get_word(reg) == MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY) { 420 pci_set_word(reg, mch->ext_tseg_mbytes); 421 } 422 } 423 424 static void mch_update_smbase_smram(MCHPCIState *mch) 425 { 426 PCIDevice *pd = PCI_DEVICE(mch); 427 uint8_t *reg = pd->config + MCH_HOST_BRIDGE_F_SMBASE; 428 bool lck; 429 430 if (!mch->has_smram_at_smbase) { 431 return; 432 } 433 434 if (*reg == MCH_HOST_BRIDGE_F_SMBASE_QUERY) { 435 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 436 MCH_HOST_BRIDGE_F_SMBASE_LCK; 437 *reg = MCH_HOST_BRIDGE_F_SMBASE_IN_RAM; 438 return; 439 } 440 441 /* 442 * default/reset state, discard written value 443 * which will disable SMRAM balackhole at SMBASE 444 */ 445 if (pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] == 0xff) { 446 *reg = 0x00; 447 } 448 449 memory_region_transaction_begin(); 450 if (*reg & MCH_HOST_BRIDGE_F_SMBASE_LCK) { 451 /* disable all writes */ 452 pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] &= 453 ~MCH_HOST_BRIDGE_F_SMBASE_LCK; 454 *reg = MCH_HOST_BRIDGE_F_SMBASE_LCK; 455 lck = true; 456 } else { 457 lck = false; 458 } 459 memory_region_set_enabled(&mch->smbase_blackhole, lck); 460 memory_region_set_enabled(&mch->smbase_window, lck); 461 memory_region_transaction_commit(); 462 } 463 464 static void mch_write_config(PCIDevice *d, 465 uint32_t address, uint32_t val, int len) 466 { 467 MCHPCIState *mch = MCH_PCI_DEVICE(d); 468 469 pci_default_write_config(d, address, val, len); 470 471 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0, 472 MCH_HOST_BRIDGE_PAM_SIZE)) { 473 mch_update_pam(mch); 474 } 475 476 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR, 477 MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) { 478 mch_update_pciexbar(mch); 479 } 480 481 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM, 482 MCH_HOST_BRIDGE_SMRAM_SIZE)) { 483 mch_update_smram(mch); 484 } 485 486 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 487 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_SIZE)) { 488 mch_update_ext_tseg_mbytes(mch); 489 } 490 491 if (ranges_overlap(address, len, MCH_HOST_BRIDGE_F_SMBASE, 1)) { 492 mch_update_smbase_smram(mch); 493 } 494 } 495 496 static void mch_update(MCHPCIState *mch) 497 { 498 mch_update_pciexbar(mch); 499 mch_update_pam(mch); 500 mch_update_smram(mch); 501 mch_update_ext_tseg_mbytes(mch); 502 mch_update_smbase_smram(mch); 503 504 /* 505 * pci hole goes from end-of-low-ram to io-apic. 506 * mmconfig will be excluded by the dsdt builder. 507 */ 508 range_set_bounds(&mch->pci_hole, 509 mch->below_4g_mem_size, 510 IO_APIC_DEFAULT_ADDRESS - 1); 511 } 512 513 static int mch_post_load(void *opaque, int version_id) 514 { 515 MCHPCIState *mch = opaque; 516 mch_update(mch); 517 return 0; 518 } 519 520 static const VMStateDescription vmstate_mch = { 521 .name = "mch", 522 .version_id = 1, 523 .minimum_version_id = 1, 524 .post_load = mch_post_load, 525 .fields = (VMStateField[]) { 526 VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState), 527 /* Used to be smm_enabled, which was basically always zero because 528 * SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code. 529 */ 530 VMSTATE_UNUSED(1), 531 VMSTATE_END_OF_LIST() 532 } 533 }; 534 535 static void mch_reset(DeviceState *qdev) 536 { 537 PCIDevice *d = PCI_DEVICE(qdev); 538 MCHPCIState *mch = MCH_PCI_DEVICE(d); 539 540 pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR, 541 MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT); 542 543 d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT; 544 d->config[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_DEFAULT; 545 d->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK; 546 d->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK; 547 548 if (mch->ext_tseg_mbytes > 0) { 549 pci_set_word(d->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, 550 MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY); 551 } 552 553 d->config[MCH_HOST_BRIDGE_F_SMBASE] = 0; 554 d->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 0xff; 555 556 mch_update(mch); 557 } 558 559 static void mch_realize(PCIDevice *d, Error **errp) 560 { 561 int i; 562 MCHPCIState *mch = MCH_PCI_DEVICE(d); 563 564 if (mch->ext_tseg_mbytes > MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_MAX) { 565 error_setg(errp, "invalid extended-tseg-mbytes value: %" PRIu16, 566 mch->ext_tseg_mbytes); 567 return; 568 } 569 570 /* setup pci memory mapping */ 571 pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory, 572 mch->pci_address_space); 573 574 /* if *disabled* show SMRAM to all CPUs */ 575 memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region", 576 mch->pci_address_space, MCH_HOST_BRIDGE_SMRAM_C_BASE, 577 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 578 memory_region_add_subregion_overlap(mch->system_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 579 &mch->smram_region, 1); 580 memory_region_set_enabled(&mch->smram_region, true); 581 582 memory_region_init_alias(&mch->open_high_smram, OBJECT(mch), "smram-open-high", 583 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 584 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 585 memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000, 586 &mch->open_high_smram, 1); 587 memory_region_set_enabled(&mch->open_high_smram, false); 588 589 /* smram, as seen by SMM CPUs */ 590 memory_region_init(&mch->smram, OBJECT(mch), "smram", 4 * GiB); 591 memory_region_set_enabled(&mch->smram, true); 592 memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low", 593 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 594 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 595 memory_region_set_enabled(&mch->low_smram, true); 596 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMRAM_C_BASE, 597 &mch->low_smram); 598 memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high", 599 mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, 600 MCH_HOST_BRIDGE_SMRAM_C_SIZE); 601 memory_region_set_enabled(&mch->high_smram, true); 602 memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram); 603 604 memory_region_init_io(&mch->tseg_blackhole, OBJECT(mch), 605 &blackhole_ops, NULL, 606 "tseg-blackhole", 0); 607 memory_region_set_enabled(&mch->tseg_blackhole, false); 608 memory_region_add_subregion_overlap(mch->system_memory, 609 mch->below_4g_mem_size, 610 &mch->tseg_blackhole, 1); 611 612 memory_region_init_alias(&mch->tseg_window, OBJECT(mch), "tseg-window", 613 mch->ram_memory, mch->below_4g_mem_size, 0); 614 memory_region_set_enabled(&mch->tseg_window, false); 615 memory_region_add_subregion(&mch->smram, mch->below_4g_mem_size, 616 &mch->tseg_window); 617 618 /* 619 * This is not what hardware does, so it's QEMU specific hack. 620 * See commit message for details. 621 */ 622 memory_region_init_io(&mch->smbase_blackhole, OBJECT(mch), &blackhole_ops, 623 NULL, "smbase-blackhole", 624 MCH_HOST_BRIDGE_SMBASE_SIZE); 625 memory_region_set_enabled(&mch->smbase_blackhole, false); 626 memory_region_add_subregion_overlap(mch->system_memory, 627 MCH_HOST_BRIDGE_SMBASE_ADDR, 628 &mch->smbase_blackhole, 1); 629 630 memory_region_init_alias(&mch->smbase_window, OBJECT(mch), 631 "smbase-window", mch->ram_memory, 632 MCH_HOST_BRIDGE_SMBASE_ADDR, 633 MCH_HOST_BRIDGE_SMBASE_SIZE); 634 memory_region_set_enabled(&mch->smbase_window, false); 635 memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMBASE_ADDR, 636 &mch->smbase_window); 637 638 object_property_add_const_link(qdev_get_machine(), "smram", 639 OBJECT(&mch->smram)); 640 641 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, 642 mch->pci_address_space, &mch->pam_regions[0], 643 PAM_BIOS_BASE, PAM_BIOS_SIZE); 644 for (i = 0; i < ARRAY_SIZE(mch->pam_regions) - 1; ++i) { 645 init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory, 646 mch->pci_address_space, &mch->pam_regions[i+1], 647 PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE); 648 } 649 } 650 651 uint64_t mch_mcfg_base(void) 652 { 653 bool ambiguous; 654 Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous); 655 if (!o) { 656 return 0; 657 } 658 return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT; 659 } 660 661 static Property mch_props[] = { 662 DEFINE_PROP_UINT16("extended-tseg-mbytes", MCHPCIState, ext_tseg_mbytes, 663 16), 664 DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true), 665 DEFINE_PROP_END_OF_LIST(), 666 }; 667 668 static void mch_class_init(ObjectClass *klass, void *data) 669 { 670 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 671 DeviceClass *dc = DEVICE_CLASS(klass); 672 673 k->realize = mch_realize; 674 k->config_write = mch_write_config; 675 dc->reset = mch_reset; 676 device_class_set_props(dc, mch_props); 677 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 678 dc->desc = "Host bridge"; 679 dc->vmsd = &vmstate_mch; 680 k->vendor_id = PCI_VENDOR_ID_INTEL; 681 /* 682 * The 'q35' machine type implements an Intel Series 3 chipset, 683 * of which there are several variants. The key difference between 684 * the 82P35 MCH ('p35') and 82Q35 GMCH ('q35') variants is that 685 * the latter has an integrated graphics adapter. QEMU does not 686 * implement integrated graphics, so uses the PCI ID for the 82P35 687 * chipset. 688 */ 689 k->device_id = PCI_DEVICE_ID_INTEL_P35_MCH; 690 k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT; 691 k->class_id = PCI_CLASS_BRIDGE_HOST; 692 /* 693 * PCI-facing part of the host bridge, not usable without the 694 * host-facing part, which can't be device_add'ed, yet. 695 */ 696 dc->user_creatable = false; 697 } 698 699 static const TypeInfo mch_info = { 700 .name = TYPE_MCH_PCI_DEVICE, 701 .parent = TYPE_PCI_DEVICE, 702 .instance_size = sizeof(MCHPCIState), 703 .class_init = mch_class_init, 704 .interfaces = (InterfaceInfo[]) { 705 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 706 { }, 707 }, 708 }; 709 710 static void q35_register(void) 711 { 712 type_register_static(&mch_info); 713 type_register_static(&q35_host_info); 714 } 715 716 type_init(q35_register); 717