1 /* 2 * QEMU ICH9 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 #include "qemu/osdep.h" 31 #include "qemu-common.h" 32 #include "cpu.h" 33 #include "hw/hw.h" 34 #include "qapi/visitor.h" 35 #include "qemu/range.h" 36 #include "hw/isa/isa.h" 37 #include "hw/sysbus.h" 38 #include "hw/i386/pc.h" 39 #include "hw/isa/apm.h" 40 #include "hw/i386/ioapic.h" 41 #include "hw/pci/pci.h" 42 #include "hw/pci/pci_bridge.h" 43 #include "hw/i386/ich9.h" 44 #include "hw/acpi/acpi.h" 45 #include "hw/acpi/ich9.h" 46 #include "hw/pci/pci_bus.h" 47 #include "exec/address-spaces.h" 48 #include "sysemu/sysemu.h" 49 #include "qom/cpu.h" 50 #include "hw/nvram/fw_cfg.h" 51 #include "qemu/cutils.h" 52 53 /*****************************************************************************/ 54 /* ICH9 LPC PCI to ISA bridge */ 55 56 static void ich9_lpc_reset(DeviceState *qdev); 57 58 /* chipset configuration register 59 * to access chipset configuration registers, pci_[sg]et_{byte, word, long} 60 * are used. 61 * Although it's not pci configuration space, it's little endian as Intel. 62 */ 63 64 static void ich9_cc_update_ir(uint8_t irr[PCI_NUM_PINS], uint16_t ir) 65 { 66 int intx; 67 for (intx = 0; intx < PCI_NUM_PINS; intx++) { 68 irr[intx] = (ir >> (intx * ICH9_CC_DIR_SHIFT)) & ICH9_CC_DIR_MASK; 69 } 70 } 71 72 static void ich9_cc_update(ICH9LPCState *lpc) 73 { 74 int slot; 75 int pci_intx; 76 77 const int reg_offsets[] = { 78 ICH9_CC_D25IR, 79 ICH9_CC_D26IR, 80 ICH9_CC_D27IR, 81 ICH9_CC_D28IR, 82 ICH9_CC_D29IR, 83 ICH9_CC_D30IR, 84 ICH9_CC_D31IR, 85 }; 86 const int *offset; 87 88 /* D{25 - 31}IR, but D30IR is read only to 0. */ 89 for (slot = 25, offset = reg_offsets; slot < 32; slot++, offset++) { 90 if (slot == 30) { 91 continue; 92 } 93 ich9_cc_update_ir(lpc->irr[slot], 94 pci_get_word(lpc->chip_config + *offset)); 95 } 96 97 /* 98 * D30: DMI2PCI bridge 99 * It is arbitrarily decided how INTx lines of PCI devices behind 100 * the bridge are connected to pirq lines. Our choice is PIRQ[E-H]. 101 * INT[A-D] are connected to PIRQ[E-H] 102 */ 103 for (pci_intx = 0; pci_intx < PCI_NUM_PINS; pci_intx++) { 104 lpc->irr[30][pci_intx] = pci_intx + 4; 105 } 106 } 107 108 static void ich9_cc_init(ICH9LPCState *lpc) 109 { 110 int slot; 111 int intx; 112 113 /* the default irq routing is arbitrary as long as it matches with 114 * acpi irq routing table. 115 * The one that is incompatible with piix_pci(= bochs) one is 116 * intentionally chosen to let the users know that the different 117 * board is used. 118 * 119 * int[A-D] -> pirq[E-F] 120 * avoid pirq A-D because they are used for pci express port 121 */ 122 for (slot = 0; slot < PCI_SLOT_MAX; slot++) { 123 for (intx = 0; intx < PCI_NUM_PINS; intx++) { 124 lpc->irr[slot][intx] = (slot + intx) % 4 + 4; 125 } 126 } 127 ich9_cc_update(lpc); 128 } 129 130 static void ich9_cc_reset(ICH9LPCState *lpc) 131 { 132 uint8_t *c = lpc->chip_config; 133 134 memset(lpc->chip_config, 0, sizeof(lpc->chip_config)); 135 136 pci_set_long(c + ICH9_CC_D31IR, ICH9_CC_DIR_DEFAULT); 137 pci_set_long(c + ICH9_CC_D30IR, ICH9_CC_D30IR_DEFAULT); 138 pci_set_long(c + ICH9_CC_D29IR, ICH9_CC_DIR_DEFAULT); 139 pci_set_long(c + ICH9_CC_D28IR, ICH9_CC_DIR_DEFAULT); 140 pci_set_long(c + ICH9_CC_D27IR, ICH9_CC_DIR_DEFAULT); 141 pci_set_long(c + ICH9_CC_D26IR, ICH9_CC_DIR_DEFAULT); 142 pci_set_long(c + ICH9_CC_D25IR, ICH9_CC_DIR_DEFAULT); 143 pci_set_long(c + ICH9_CC_GCS, ICH9_CC_GCS_DEFAULT); 144 145 ich9_cc_update(lpc); 146 } 147 148 static void ich9_cc_addr_len(uint64_t *addr, unsigned *len) 149 { 150 *addr &= ICH9_CC_ADDR_MASK; 151 if (*addr + *len >= ICH9_CC_SIZE) { 152 *len = ICH9_CC_SIZE - *addr; 153 } 154 } 155 156 /* val: little endian */ 157 static void ich9_cc_write(void *opaque, hwaddr addr, 158 uint64_t val, unsigned len) 159 { 160 ICH9LPCState *lpc = (ICH9LPCState *)opaque; 161 162 ich9_cc_addr_len(&addr, &len); 163 memcpy(lpc->chip_config + addr, &val, len); 164 pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d)); 165 ich9_cc_update(lpc); 166 } 167 168 /* return value: little endian */ 169 static uint64_t ich9_cc_read(void *opaque, hwaddr addr, 170 unsigned len) 171 { 172 ICH9LPCState *lpc = (ICH9LPCState *)opaque; 173 174 uint32_t val = 0; 175 ich9_cc_addr_len(&addr, &len); 176 memcpy(&val, lpc->chip_config + addr, len); 177 return val; 178 } 179 180 /* IRQ routing */ 181 /* */ 182 static void ich9_lpc_rout(uint8_t pirq_rout, int *pic_irq, int *pic_dis) 183 { 184 *pic_irq = pirq_rout & ICH9_LPC_PIRQ_ROUT_MASK; 185 *pic_dis = pirq_rout & ICH9_LPC_PIRQ_ROUT_IRQEN; 186 } 187 188 static void ich9_lpc_pic_irq(ICH9LPCState *lpc, int pirq_num, 189 int *pic_irq, int *pic_dis) 190 { 191 switch (pirq_num) { 192 case 0 ... 3: /* A-D */ 193 ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQA_ROUT + pirq_num], 194 pic_irq, pic_dis); 195 return; 196 case 4 ... 7: /* E-H */ 197 ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQE_ROUT + (pirq_num - 4)], 198 pic_irq, pic_dis); 199 return; 200 default: 201 break; 202 } 203 abort(); 204 } 205 206 /* gsi: i8259+ioapic irq 0-15, otherwise assert */ 207 static void ich9_lpc_update_pic(ICH9LPCState *lpc, int gsi) 208 { 209 int i, pic_level; 210 211 assert(gsi < ICH9_LPC_PIC_NUM_PINS); 212 213 /* The pic level is the logical OR of all the PCI irqs mapped to it */ 214 pic_level = 0; 215 for (i = 0; i < ICH9_LPC_NB_PIRQS; i++) { 216 int tmp_irq; 217 int tmp_dis; 218 ich9_lpc_pic_irq(lpc, i, &tmp_irq, &tmp_dis); 219 if (!tmp_dis && tmp_irq == gsi) { 220 pic_level |= pci_bus_get_irq_level(pci_get_bus(&lpc->d), i); 221 } 222 } 223 if (gsi == lpc->sci_gsi) { 224 pic_level |= lpc->sci_level; 225 } 226 227 qemu_set_irq(lpc->gsi[gsi], pic_level); 228 } 229 230 /* APIC mode: GSIx: PIRQ[A-H] -> GSI 16, ... no pirq shares same APIC pins. */ 231 static int ich9_pirq_to_gsi(int pirq) 232 { 233 return pirq + ICH9_LPC_PIC_NUM_PINS; 234 } 235 236 static int ich9_gsi_to_pirq(int gsi) 237 { 238 return gsi - ICH9_LPC_PIC_NUM_PINS; 239 } 240 241 /* gsi: ioapic irq 16-23, otherwise assert */ 242 static void ich9_lpc_update_apic(ICH9LPCState *lpc, int gsi) 243 { 244 int level = 0; 245 246 assert(gsi >= ICH9_LPC_PIC_NUM_PINS); 247 248 level |= pci_bus_get_irq_level(pci_get_bus(&lpc->d), ich9_gsi_to_pirq(gsi)); 249 if (gsi == lpc->sci_gsi) { 250 level |= lpc->sci_level; 251 } 252 253 qemu_set_irq(lpc->gsi[gsi], level); 254 } 255 256 void ich9_lpc_set_irq(void *opaque, int pirq, int level) 257 { 258 ICH9LPCState *lpc = opaque; 259 int pic_irq, pic_dis; 260 261 assert(0 <= pirq); 262 assert(pirq < ICH9_LPC_NB_PIRQS); 263 264 ich9_lpc_update_apic(lpc, ich9_pirq_to_gsi(pirq)); 265 ich9_lpc_pic_irq(lpc, pirq, &pic_irq, &pic_dis); 266 ich9_lpc_update_pic(lpc, pic_irq); 267 } 268 269 /* return the pirq number (PIRQ[A-H]:0-7) corresponding to 270 * a given device irq pin. 271 */ 272 int ich9_lpc_map_irq(PCIDevice *pci_dev, int intx) 273 { 274 BusState *bus = qdev_get_parent_bus(&pci_dev->qdev); 275 PCIBus *pci_bus = PCI_BUS(bus); 276 PCIDevice *lpc_pdev = 277 pci_bus->devices[PCI_DEVFN(ICH9_LPC_DEV, ICH9_LPC_FUNC)]; 278 ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pdev); 279 280 return lpc->irr[PCI_SLOT(pci_dev->devfn)][intx]; 281 } 282 283 PCIINTxRoute ich9_route_intx_pin_to_irq(void *opaque, int pirq_pin) 284 { 285 ICH9LPCState *lpc = opaque; 286 PCIINTxRoute route; 287 int pic_irq; 288 int pic_dis; 289 290 assert(0 <= pirq_pin); 291 assert(pirq_pin < ICH9_LPC_NB_PIRQS); 292 293 route.mode = PCI_INTX_ENABLED; 294 ich9_lpc_pic_irq(lpc, pirq_pin, &pic_irq, &pic_dis); 295 if (!pic_dis) { 296 if (pic_irq < ICH9_LPC_PIC_NUM_PINS) { 297 route.irq = pic_irq; 298 } else { 299 route.mode = PCI_INTX_DISABLED; 300 route.irq = -1; 301 } 302 } else { 303 route.irq = ich9_pirq_to_gsi(pirq_pin); 304 } 305 306 return route; 307 } 308 309 void ich9_generate_smi(void) 310 { 311 cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI); 312 } 313 314 static int ich9_lpc_sci_irq(ICH9LPCState *lpc) 315 { 316 switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] & 317 ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK) { 318 case ICH9_LPC_ACPI_CTRL_9: 319 return 9; 320 case ICH9_LPC_ACPI_CTRL_10: 321 return 10; 322 case ICH9_LPC_ACPI_CTRL_11: 323 return 11; 324 case ICH9_LPC_ACPI_CTRL_20: 325 return 20; 326 case ICH9_LPC_ACPI_CTRL_21: 327 return 21; 328 default: 329 /* reserved */ 330 break; 331 } 332 return -1; 333 } 334 335 static void ich9_set_sci(void *opaque, int irq_num, int level) 336 { 337 ICH9LPCState *lpc = opaque; 338 int irq; 339 340 assert(irq_num == 0); 341 level = !!level; 342 if (level == lpc->sci_level) { 343 return; 344 } 345 lpc->sci_level = level; 346 347 irq = lpc->sci_gsi; 348 if (irq < 0) { 349 return; 350 } 351 352 if (irq >= ICH9_LPC_PIC_NUM_PINS) { 353 ich9_lpc_update_apic(lpc, irq); 354 } else { 355 ich9_lpc_update_pic(lpc, irq); 356 } 357 } 358 359 static void smi_features_ok_callback(void *opaque) 360 { 361 ICH9LPCState *lpc = opaque; 362 uint64_t guest_features; 363 364 if (lpc->smi_features_ok) { 365 /* negotiation already complete, features locked */ 366 return; 367 } 368 369 memcpy(&guest_features, lpc->smi_guest_features_le, sizeof guest_features); 370 le64_to_cpus(&guest_features); 371 if (guest_features & ~lpc->smi_host_features) { 372 /* guest requests invalid features, leave @features_ok at zero */ 373 return; 374 } 375 376 /* valid feature subset requested, lock it down, report success */ 377 lpc->smi_negotiated_features = guest_features; 378 lpc->smi_features_ok = 1; 379 } 380 381 void ich9_lpc_pm_init(PCIDevice *lpc_pci, bool smm_enabled) 382 { 383 ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pci); 384 qemu_irq sci_irq; 385 FWCfgState *fw_cfg = fw_cfg_find(); 386 387 sci_irq = qemu_allocate_irq(ich9_set_sci, lpc, 0); 388 ich9_pm_init(lpc_pci, &lpc->pm, smm_enabled, sci_irq); 389 390 if (lpc->smi_host_features && fw_cfg) { 391 uint64_t host_features_le; 392 393 host_features_le = cpu_to_le64(lpc->smi_host_features); 394 memcpy(lpc->smi_host_features_le, &host_features_le, 395 sizeof host_features_le); 396 fw_cfg_add_file(fw_cfg, "etc/smi/supported-features", 397 lpc->smi_host_features_le, 398 sizeof lpc->smi_host_features_le); 399 400 /* The other two guest-visible fields are cleared on device reset, we 401 * just link them into fw_cfg here. 402 */ 403 fw_cfg_add_file_callback(fw_cfg, "etc/smi/requested-features", 404 NULL, NULL, NULL, 405 lpc->smi_guest_features_le, 406 sizeof lpc->smi_guest_features_le, 407 false); 408 fw_cfg_add_file_callback(fw_cfg, "etc/smi/features-ok", 409 smi_features_ok_callback, NULL, lpc, 410 &lpc->smi_features_ok, 411 sizeof lpc->smi_features_ok, 412 true); 413 } 414 415 ich9_lpc_reset(&lpc->d.qdev); 416 } 417 418 /* APM */ 419 420 static void ich9_apm_ctrl_changed(uint32_t val, void *arg) 421 { 422 ICH9LPCState *lpc = arg; 423 424 /* ACPI specs 3.0, 4.7.2.5 */ 425 acpi_pm1_cnt_update(&lpc->pm.acpi_regs, 426 val == ICH9_APM_ACPI_ENABLE, 427 val == ICH9_APM_ACPI_DISABLE); 428 if (val == ICH9_APM_ACPI_ENABLE || val == ICH9_APM_ACPI_DISABLE) { 429 return; 430 } 431 432 /* SMI_EN = PMBASE + 30. SMI control and enable register */ 433 if (lpc->pm.smi_en & ICH9_PMIO_SMI_EN_APMC_EN) { 434 if (lpc->smi_negotiated_features & 435 (UINT64_C(1) << ICH9_LPC_SMI_F_BROADCAST_BIT)) { 436 CPUState *cs; 437 CPU_FOREACH(cs) { 438 cpu_interrupt(cs, CPU_INTERRUPT_SMI); 439 } 440 } else { 441 cpu_interrupt(current_cpu, CPU_INTERRUPT_SMI); 442 } 443 } 444 } 445 446 /* config:PMBASE */ 447 static void 448 ich9_lpc_pmbase_sci_update(ICH9LPCState *lpc) 449 { 450 uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE); 451 uint8_t acpi_cntl = pci_get_long(lpc->d.config + ICH9_LPC_ACPI_CTRL); 452 uint8_t new_gsi; 453 454 if (acpi_cntl & ICH9_LPC_ACPI_CTRL_ACPI_EN) { 455 pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK; 456 } else { 457 pm_io_base = 0; 458 } 459 460 ich9_pm_iospace_update(&lpc->pm, pm_io_base); 461 462 new_gsi = ich9_lpc_sci_irq(lpc); 463 if (lpc->sci_level && new_gsi != lpc->sci_gsi) { 464 qemu_set_irq(lpc->pm.irq, 0); 465 lpc->sci_gsi = new_gsi; 466 qemu_set_irq(lpc->pm.irq, 1); 467 } 468 lpc->sci_gsi = new_gsi; 469 } 470 471 /* config:RCBA */ 472 static void ich9_lpc_rcba_update(ICH9LPCState *lpc, uint32_t rcba_old) 473 { 474 uint32_t rcba = pci_get_long(lpc->d.config + ICH9_LPC_RCBA); 475 476 if (rcba_old & ICH9_LPC_RCBA_EN) { 477 memory_region_del_subregion(get_system_memory(), &lpc->rcrb_mem); 478 } 479 if (rcba & ICH9_LPC_RCBA_EN) { 480 memory_region_add_subregion_overlap(get_system_memory(), 481 rcba & ICH9_LPC_RCBA_BA_MASK, 482 &lpc->rcrb_mem, 1); 483 } 484 } 485 486 /* config:GEN_PMCON* */ 487 static void 488 ich9_lpc_pmcon_update(ICH9LPCState *lpc) 489 { 490 uint16_t gen_pmcon_1 = pci_get_word(lpc->d.config + ICH9_LPC_GEN_PMCON_1); 491 uint16_t wmask; 492 493 if (gen_pmcon_1 & ICH9_LPC_GEN_PMCON_1_SMI_LOCK) { 494 wmask = pci_get_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1); 495 wmask &= ~ICH9_LPC_GEN_PMCON_1_SMI_LOCK; 496 pci_set_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1, wmask); 497 lpc->pm.smi_en_wmask &= ~1; 498 } 499 } 500 501 static int ich9_lpc_post_load(void *opaque, int version_id) 502 { 503 ICH9LPCState *lpc = opaque; 504 505 ich9_lpc_pmbase_sci_update(lpc); 506 ich9_lpc_rcba_update(lpc, 0 /* disabled ICH9_LPC_RCBA_EN */); 507 ich9_lpc_pmcon_update(lpc); 508 return 0; 509 } 510 511 static void ich9_lpc_config_write(PCIDevice *d, 512 uint32_t addr, uint32_t val, int len) 513 { 514 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); 515 uint32_t rcba_old = pci_get_long(d->config + ICH9_LPC_RCBA); 516 517 pci_default_write_config(d, addr, val, len); 518 if (ranges_overlap(addr, len, ICH9_LPC_PMBASE, 4) || 519 ranges_overlap(addr, len, ICH9_LPC_ACPI_CTRL, 1)) { 520 ich9_lpc_pmbase_sci_update(lpc); 521 } 522 if (ranges_overlap(addr, len, ICH9_LPC_RCBA, 4)) { 523 ich9_lpc_rcba_update(lpc, rcba_old); 524 } 525 if (ranges_overlap(addr, len, ICH9_LPC_PIRQA_ROUT, 4)) { 526 pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d)); 527 } 528 if (ranges_overlap(addr, len, ICH9_LPC_PIRQE_ROUT, 4)) { 529 pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d)); 530 } 531 if (ranges_overlap(addr, len, ICH9_LPC_GEN_PMCON_1, 8)) { 532 ich9_lpc_pmcon_update(lpc); 533 } 534 } 535 536 static void ich9_lpc_reset(DeviceState *qdev) 537 { 538 PCIDevice *d = PCI_DEVICE(qdev); 539 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); 540 uint32_t rcba_old = pci_get_long(d->config + ICH9_LPC_RCBA); 541 int i; 542 543 for (i = 0; i < 4; i++) { 544 pci_set_byte(d->config + ICH9_LPC_PIRQA_ROUT + i, 545 ICH9_LPC_PIRQ_ROUT_DEFAULT); 546 } 547 for (i = 0; i < 4; i++) { 548 pci_set_byte(d->config + ICH9_LPC_PIRQE_ROUT + i, 549 ICH9_LPC_PIRQ_ROUT_DEFAULT); 550 } 551 pci_set_byte(d->config + ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_DEFAULT); 552 553 pci_set_long(d->config + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_DEFAULT); 554 pci_set_long(d->config + ICH9_LPC_RCBA, ICH9_LPC_RCBA_DEFAULT); 555 556 ich9_cc_reset(lpc); 557 558 ich9_lpc_pmbase_sci_update(lpc); 559 ich9_lpc_rcba_update(lpc, rcba_old); 560 561 lpc->sci_level = 0; 562 lpc->rst_cnt = 0; 563 564 memset(lpc->smi_guest_features_le, 0, sizeof lpc->smi_guest_features_le); 565 lpc->smi_features_ok = 0; 566 lpc->smi_negotiated_features = 0; 567 } 568 569 /* root complex register block is mapped into memory space */ 570 static const MemoryRegionOps rcrb_mmio_ops = { 571 .read = ich9_cc_read, 572 .write = ich9_cc_write, 573 .endianness = DEVICE_LITTLE_ENDIAN, 574 }; 575 576 static void ich9_lpc_machine_ready(Notifier *n, void *opaque) 577 { 578 ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready); 579 MemoryRegion *io_as = pci_address_space_io(&s->d); 580 uint8_t *pci_conf; 581 582 pci_conf = s->d.config; 583 if (memory_region_present(io_as, 0x3f8)) { 584 /* com1 */ 585 pci_conf[0x82] |= 0x01; 586 } 587 if (memory_region_present(io_as, 0x2f8)) { 588 /* com2 */ 589 pci_conf[0x82] |= 0x02; 590 } 591 if (memory_region_present(io_as, 0x378)) { 592 /* lpt */ 593 pci_conf[0x82] |= 0x04; 594 } 595 if (memory_region_present(io_as, 0x3f2)) { 596 /* floppy */ 597 pci_conf[0x82] |= 0x08; 598 } 599 } 600 601 /* reset control */ 602 static void ich9_rst_cnt_write(void *opaque, hwaddr addr, uint64_t val, 603 unsigned len) 604 { 605 ICH9LPCState *lpc = opaque; 606 607 if (val & 4) { 608 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 609 return; 610 } 611 lpc->rst_cnt = val & 0xA; /* keep FULL_RST (bit 3) and SYS_RST (bit 1) */ 612 } 613 614 static uint64_t ich9_rst_cnt_read(void *opaque, hwaddr addr, unsigned len) 615 { 616 ICH9LPCState *lpc = opaque; 617 618 return lpc->rst_cnt; 619 } 620 621 static const MemoryRegionOps ich9_rst_cnt_ops = { 622 .read = ich9_rst_cnt_read, 623 .write = ich9_rst_cnt_write, 624 .endianness = DEVICE_LITTLE_ENDIAN 625 }; 626 627 Object *ich9_lpc_find(void) 628 { 629 bool ambig; 630 Object *o = object_resolve_path_type("", TYPE_ICH9_LPC_DEVICE, &ambig); 631 632 if (ambig) { 633 return NULL; 634 } 635 return o; 636 } 637 638 static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name, 639 void *opaque, Error **errp) 640 { 641 ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj); 642 uint32_t value = lpc->sci_gsi; 643 644 visit_type_uint32(v, name, &value, errp); 645 } 646 647 static void ich9_lpc_add_properties(ICH9LPCState *lpc) 648 { 649 static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE; 650 static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE; 651 652 object_property_add(OBJECT(lpc), ACPI_PM_PROP_SCI_INT, "uint32", 653 ich9_lpc_get_sci_int, 654 NULL, NULL, NULL, NULL); 655 object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD, 656 &acpi_enable_cmd, NULL); 657 object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD, 658 &acpi_disable_cmd, NULL); 659 660 ich9_pm_add_properties(OBJECT(lpc), &lpc->pm, NULL); 661 } 662 663 static void ich9_lpc_initfn(Object *obj) 664 { 665 ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj); 666 667 ich9_lpc_add_properties(lpc); 668 } 669 670 static void ich9_lpc_realize(PCIDevice *d, Error **errp) 671 { 672 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d); 673 DeviceState *dev = DEVICE(d); 674 ISABus *isa_bus; 675 676 isa_bus = isa_bus_new(DEVICE(d), get_system_memory(), get_system_io(), 677 errp); 678 if (!isa_bus) { 679 return; 680 } 681 682 pci_set_long(d->wmask + ICH9_LPC_PMBASE, 683 ICH9_LPC_PMBASE_BASE_ADDRESS_MASK); 684 pci_set_byte(d->wmask + ICH9_LPC_PMBASE, 685 ICH9_LPC_ACPI_CTRL_ACPI_EN | 686 ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK); 687 688 memory_region_init_io(&lpc->rcrb_mem, OBJECT(d), &rcrb_mmio_ops, lpc, 689 "lpc-rcrb-mmio", ICH9_CC_SIZE); 690 691 lpc->isa_bus = isa_bus; 692 693 ich9_cc_init(lpc); 694 apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc); 695 696 lpc->machine_ready.notify = ich9_lpc_machine_ready; 697 qemu_add_machine_init_done_notifier(&lpc->machine_ready); 698 699 memory_region_init_io(&lpc->rst_cnt_mem, OBJECT(d), &ich9_rst_cnt_ops, lpc, 700 "lpc-reset-control", 1); 701 memory_region_add_subregion_overlap(pci_address_space_io(d), 702 ICH9_RST_CNT_IOPORT, &lpc->rst_cnt_mem, 703 1); 704 705 qdev_init_gpio_out_named(dev, lpc->gsi, ICH9_GPIO_GSI, GSI_NUM_PINS); 706 707 isa_bus_irqs(isa_bus, lpc->gsi); 708 } 709 710 static bool ich9_rst_cnt_needed(void *opaque) 711 { 712 ICH9LPCState *lpc = opaque; 713 714 return (lpc->rst_cnt != 0); 715 } 716 717 static const VMStateDescription vmstate_ich9_rst_cnt = { 718 .name = "ICH9LPC/rst_cnt", 719 .version_id = 1, 720 .minimum_version_id = 1, 721 .needed = ich9_rst_cnt_needed, 722 .fields = (VMStateField[]) { 723 VMSTATE_UINT8(rst_cnt, ICH9LPCState), 724 VMSTATE_END_OF_LIST() 725 } 726 }; 727 728 static bool ich9_smi_feat_needed(void *opaque) 729 { 730 ICH9LPCState *lpc = opaque; 731 732 return !buffer_is_zero(lpc->smi_guest_features_le, 733 sizeof lpc->smi_guest_features_le) || 734 lpc->smi_features_ok; 735 } 736 737 static const VMStateDescription vmstate_ich9_smi_feat = { 738 .name = "ICH9LPC/smi_feat", 739 .version_id = 1, 740 .minimum_version_id = 1, 741 .needed = ich9_smi_feat_needed, 742 .fields = (VMStateField[]) { 743 VMSTATE_UINT8_ARRAY(smi_guest_features_le, ICH9LPCState, 744 sizeof(uint64_t)), 745 VMSTATE_UINT8(smi_features_ok, ICH9LPCState), 746 VMSTATE_UINT64(smi_negotiated_features, ICH9LPCState), 747 VMSTATE_END_OF_LIST() 748 } 749 }; 750 751 static const VMStateDescription vmstate_ich9_lpc = { 752 .name = "ICH9LPC", 753 .version_id = 1, 754 .minimum_version_id = 1, 755 .post_load = ich9_lpc_post_load, 756 .fields = (VMStateField[]) { 757 VMSTATE_PCI_DEVICE(d, ICH9LPCState), 758 VMSTATE_STRUCT(apm, ICH9LPCState, 0, vmstate_apm, APMState), 759 VMSTATE_STRUCT(pm, ICH9LPCState, 0, vmstate_ich9_pm, ICH9LPCPMRegs), 760 VMSTATE_UINT8_ARRAY(chip_config, ICH9LPCState, ICH9_CC_SIZE), 761 VMSTATE_UINT32(sci_level, ICH9LPCState), 762 VMSTATE_END_OF_LIST() 763 }, 764 .subsections = (const VMStateDescription*[]) { 765 &vmstate_ich9_rst_cnt, 766 &vmstate_ich9_smi_feat, 767 NULL 768 } 769 }; 770 771 static Property ich9_lpc_properties[] = { 772 DEFINE_PROP_BOOL("noreboot", ICH9LPCState, pin_strap.spkr_hi, true), 773 DEFINE_PROP_BIT64("x-smi-broadcast", ICH9LPCState, smi_host_features, 774 ICH9_LPC_SMI_F_BROADCAST_BIT, true), 775 DEFINE_PROP_END_OF_LIST(), 776 }; 777 778 static void ich9_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev) 779 { 780 ICH9LPCState *s = ICH9_LPC_DEVICE(adev); 781 782 acpi_send_gpe_event(&s->pm.acpi_regs, s->pm.irq, ev); 783 } 784 785 static void ich9_lpc_class_init(ObjectClass *klass, void *data) 786 { 787 DeviceClass *dc = DEVICE_CLASS(klass); 788 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 789 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 790 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass); 791 792 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 793 dc->reset = ich9_lpc_reset; 794 k->realize = ich9_lpc_realize; 795 dc->vmsd = &vmstate_ich9_lpc; 796 dc->props = ich9_lpc_properties; 797 k->config_write = ich9_lpc_config_write; 798 dc->desc = "ICH9 LPC bridge"; 799 k->vendor_id = PCI_VENDOR_ID_INTEL; 800 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8; 801 k->revision = ICH9_A2_LPC_REVISION; 802 k->class_id = PCI_CLASS_BRIDGE_ISA; 803 /* 804 * Reason: part of ICH9 southbridge, needs to be wired up by 805 * pc_q35_init() 806 */ 807 dc->user_creatable = false; 808 hc->pre_plug = ich9_pm_device_pre_plug_cb; 809 hc->plug = ich9_pm_device_plug_cb; 810 hc->unplug_request = ich9_pm_device_unplug_request_cb; 811 hc->unplug = ich9_pm_device_unplug_cb; 812 adevc->ospm_status = ich9_pm_ospm_status; 813 adevc->send_event = ich9_send_gpe; 814 adevc->madt_cpu = pc_madt_cpu_entry; 815 } 816 817 static const TypeInfo ich9_lpc_info = { 818 .name = TYPE_ICH9_LPC_DEVICE, 819 .parent = TYPE_PCI_DEVICE, 820 .instance_size = sizeof(struct ICH9LPCState), 821 .instance_init = ich9_lpc_initfn, 822 .class_init = ich9_lpc_class_init, 823 .interfaces = (InterfaceInfo[]) { 824 { TYPE_HOTPLUG_HANDLER }, 825 { TYPE_ACPI_DEVICE_IF }, 826 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 827 { } 828 } 829 }; 830 831 static void ich9_lpc_register(void) 832 { 833 type_register_static(&ich9_lpc_info); 834 } 835 836 type_init(ich9_lpc_register); 837