hw/isa/lpc_ich9.c

   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 "hw/hw.h"
  33 #include "qapi/visitor.h"
  34 #include "qemu/range.h"
  35 #include "hw/isa/isa.h"
  36 #include "hw/sysbus.h"
  37 #include "hw/i386/pc.h"
  38 #include "hw/isa/apm.h"
  39 #include "hw/i386/ioapic.h"
  40 #include "hw/pci/pci.h"
  41 #include "hw/pci/pcie_host.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
  50 static int ich9_lpc_sci_irq(ICH9LPCState *lpc);
  51
  52 /*****************************************************************************/
  53 /* ICH9 LPC PCI to ISA bridge */
  54
  55 static void ich9_lpc_reset(DeviceState *qdev);
  56
  57 /* chipset configuration register
  58  * to access chipset configuration registers, pci_[sg]et_{byte, word, long}
  59  * are used.
  60  * Although it's not pci configuration space, it's little endian as Intel.
  61  */
  62
  63 static void ich9_cc_update_ir(uint8_t irr[PCI_NUM_PINS], uint16_t ir)
  64 {
  65     int intx;
  66     for (intx = 0; intx < PCI_NUM_PINS; intx++) {
  67         irr[intx] = (ir >> (intx * ICH9_CC_DIR_SHIFT)) & ICH9_CC_DIR_MASK;
  68     }
  69 }
  70
  71 static void ich9_cc_update(ICH9LPCState *lpc)
  72 {
  73     int slot;
  74     int pci_intx;
  75
  76     const int reg_offsets[] = {
  77         ICH9_CC_D25IR,
  78         ICH9_CC_D26IR,
  79         ICH9_CC_D27IR,
  80         ICH9_CC_D28IR,
  81         ICH9_CC_D29IR,
  82         ICH9_CC_D30IR,
  83         ICH9_CC_D31IR,
  84     };
  85     const int *offset;
  86
  87     /* D{25 - 31}IR, but D30IR is read only to 0. */
  88     for (slot = 25, offset = reg_offsets; slot < 32; slot++, offset++) {
  89         if (slot == 30) {
  90             continue;
  91         }
  92         ich9_cc_update_ir(lpc->irr[slot],
  93                           pci_get_word(lpc->chip_config + *offset));
  94     }
  95
  96     /*
  97      * D30: DMI2PCI bridge
  98      * It is arbitrarily decided how INTx lines of PCI devicesbehind the bridge
  99      * are connected to pirq lines. Our choice is PIRQ[E-H].
 100      * INT[A-D] are connected to PIRQ[E-H]
 101      */
 102     for (pci_intx = 0; pci_intx < PCI_NUM_PINS; pci_intx++) {
 103         lpc->irr[30][pci_intx] = pci_intx + 4;
 104     }
 105 }
 106
 107 static void ich9_cc_init(ICH9LPCState *lpc)
 108 {
 109     int slot;
 110     int intx;
 111
 112     /* the default irq routing is arbitrary as long as it matches with
 113      * acpi irq routing table.
 114      * The one that is incompatible with piix_pci(= bochs) one is
 115      * intentionally chosen to let the users know that the different
 116      * board is used.
 117      *
 118      * int[A-D] -> pirq[E-F]
 119      * avoid pirq A-D because they are used for pci express port
 120      */
 121     for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
 122         for (intx = 0; intx < PCI_NUM_PINS; intx++) {
 123             lpc->irr[slot][intx] = (slot + intx) % 4 + 4;
 124         }
 125     }
 126     ich9_cc_update(lpc);
 127 }
 128
 129 static void ich9_cc_reset(ICH9LPCState *lpc)
 130 {
 131     uint8_t *c = lpc->chip_config;
 132
 133     memset(lpc->chip_config, 0, sizeof(lpc->chip_config));
 134
 135     pci_set_long(c + ICH9_CC_D31IR, ICH9_CC_DIR_DEFAULT);
 136     pci_set_long(c + ICH9_CC_D30IR, ICH9_CC_D30IR_DEFAULT);
 137     pci_set_long(c + ICH9_CC_D29IR, ICH9_CC_DIR_DEFAULT);
 138     pci_set_long(c + ICH9_CC_D28IR, ICH9_CC_DIR_DEFAULT);
 139     pci_set_long(c + ICH9_CC_D27IR, ICH9_CC_DIR_DEFAULT);
 140     pci_set_long(c + ICH9_CC_D26IR, ICH9_CC_DIR_DEFAULT);
 141     pci_set_long(c + ICH9_CC_D25IR, ICH9_CC_DIR_DEFAULT);
 142     pci_set_long(c + ICH9_CC_GCS, ICH9_CC_GCS_DEFAULT);
 143
 144     ich9_cc_update(lpc);
 145 }
 146
 147 static void ich9_cc_addr_len(uint64_t *addr, unsigned *len)
 148 {
 149     *addr &= ICH9_CC_ADDR_MASK;
 150     if (*addr + *len >= ICH9_CC_SIZE) {
 151         *len = ICH9_CC_SIZE - *addr;
 152     }
 153 }
 154
 155 /* val: little endian */
 156 static void ich9_cc_write(void *opaque, hwaddr addr,
 157                           uint64_t val, unsigned len)
 158 {
 159     ICH9LPCState *lpc = (ICH9LPCState *)opaque;
 160
 161     ich9_cc_addr_len(&addr, &len);
 162     memcpy(lpc->chip_config + addr, &val, len);
 163     pci_bus_fire_intx_routing_notifier(lpc->d.bus);
 164     ich9_cc_update(lpc);
 165 }
 166
 167 /* return value: little endian */
 168 static uint64_t ich9_cc_read(void *opaque, hwaddr addr,
 169                               unsigned len)
 170 {
 171     ICH9LPCState *lpc = (ICH9LPCState *)opaque;
 172
 173     uint32_t val = 0;
 174     ich9_cc_addr_len(&addr, &len);
 175     memcpy(&val, lpc->chip_config + addr, len);
 176     return val;
 177 }
 178
 179 /* IRQ routing */
 180 /* */
 181 static void ich9_lpc_rout(uint8_t pirq_rout, int *pic_irq, int *pic_dis)
 182 {
 183     *pic_irq = pirq_rout & ICH9_LPC_PIRQ_ROUT_MASK;
 184     *pic_dis = pirq_rout & ICH9_LPC_PIRQ_ROUT_IRQEN;
 185 }
 186
 187 static void ich9_lpc_pic_irq(ICH9LPCState *lpc, int pirq_num,
 188                              int *pic_irq, int *pic_dis)
 189 {
 190     switch (pirq_num) {
 191     case 0 ... 3: /* A-D */
 192         ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQA_ROUT + pirq_num],
 193                       pic_irq, pic_dis);
 194         return;
 195     case 4 ... 7: /* E-H */
 196         ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQE_ROUT + (pirq_num - 4)],
 197                       pic_irq, pic_dis);
 198         return;
 199     default:
 200         break;
 201     }
 202     abort();
 203 }
 204
 205 /* pic_irq: i8254 irq 0-15 */
 206 static void ich9_lpc_update_pic(ICH9LPCState *lpc, int pic_irq)
 207 {
 208     int i, pic_level;
 209
 210     /* The pic level is the logical OR of all the PCI irqs mapped to it */
 211     pic_level = 0;
 212     for (i = 0; i < ICH9_LPC_NB_PIRQS; i++) {
 213         int tmp_irq;
 214         int tmp_dis;
 215         ich9_lpc_pic_irq(lpc, i, &tmp_irq, &tmp_dis);
 216         if (!tmp_dis && pic_irq == tmp_irq) {
 217             pic_level |= pci_bus_get_irq_level(lpc->d.bus, i);
 218         }
 219     }
 220     if (pic_irq == ich9_lpc_sci_irq(lpc)) {
 221         pic_level |= lpc->sci_level;
 222     }
 223
 224     qemu_set_irq(lpc->pic[pic_irq], pic_level);
 225 }
 226
 227 /* pirq: pirq[A-H] 0-7*/
 228 static void ich9_lpc_update_by_pirq(ICH9LPCState *lpc, int pirq)
 229 {
 230     int pic_irq;
 231     int pic_dis;
 232
 233     ich9_lpc_pic_irq(lpc, pirq, &pic_irq, &pic_dis);
 234     assert(pic_irq < ICH9_LPC_PIC_NUM_PINS);
 235     if (pic_dis) {
 236         return;
 237     }
 238
 239     ich9_lpc_update_pic(lpc, pic_irq);
 240 }
 241
 242 /* APIC mode: GSIx: PIRQ[A-H] -> GSI 16, ... no pirq shares same APIC pins. */
 243 static int ich9_pirq_to_gsi(int pirq)
 244 {
 245     return pirq + ICH9_LPC_PIC_NUM_PINS;
 246 }
 247
 248 static int ich9_gsi_to_pirq(int gsi)
 249 {
 250     return gsi - ICH9_LPC_PIC_NUM_PINS;
 251 }
 252
 253 static void ich9_lpc_update_apic(ICH9LPCState *lpc, int gsi)
 254 {
 255     int level = 0;
 256
 257     if (gsi >= ICH9_LPC_PIC_NUM_PINS) {
 258         level |= pci_bus_get_irq_level(lpc->d.bus, ich9_gsi_to_pirq(gsi));
 259     }
 260     if (gsi == ich9_lpc_sci_irq(lpc)) {
 261         level |= lpc->sci_level;
 262     }
 263
 264     qemu_set_irq(lpc->ioapic[gsi], level);
 265 }
 266
 267 void ich9_lpc_set_irq(void *opaque, int pirq, int level)
 268 {
 269     ICH9LPCState *lpc = opaque;
 270
 271     assert(0 <= pirq);
 272     assert(pirq < ICH9_LPC_NB_PIRQS);
 273
 274     ich9_lpc_update_apic(lpc, ich9_pirq_to_gsi(pirq));
 275     ich9_lpc_update_by_pirq(lpc, pirq);
 276 }
 277
 278 /* return the pirq number (PIRQ[A-H]:0-7) corresponding to
 279  * a given device irq pin.
 280  */
 281 int ich9_lpc_map_irq(PCIDevice *pci_dev, int intx)
 282 {
 283     BusState *bus = qdev_get_parent_bus(&pci_dev->qdev);
 284     PCIBus *pci_bus = PCI_BUS(bus);
 285     PCIDevice *lpc_pdev =
 286             pci_bus->devices[PCI_DEVFN(ICH9_LPC_DEV, ICH9_LPC_FUNC)];
 287     ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pdev);
 288
 289     return lpc->irr[PCI_SLOT(pci_dev->devfn)][intx];
 290 }
 291
 292 PCIINTxRoute ich9_route_intx_pin_to_irq(void *opaque, int pirq_pin)
 293 {
 294     ICH9LPCState *lpc = opaque;
 295     PCIINTxRoute route;
 296     int pic_irq;
 297     int pic_dis;
 298
 299     assert(0 <= pirq_pin);
 300     assert(pirq_pin < ICH9_LPC_NB_PIRQS);
 301
 302     route.mode = PCI_INTX_ENABLED;
 303     ich9_lpc_pic_irq(lpc, pirq_pin, &pic_irq, &pic_dis);
 304     if (!pic_dis) {
 305         if (pic_irq < ICH9_LPC_PIC_NUM_PINS) {
 306             route.irq = pic_irq;
 307         } else {
 308             route.mode = PCI_INTX_DISABLED;
 309             route.irq = -1;
 310         }
 311     } else {
 312         route.irq = ich9_pirq_to_gsi(pirq_pin);
 313     }
 314
 315     return route;
 316 }
 317
 318 void ich9_generate_smi(void)
 319 {
 320     cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
 321 }
 322
 323 void ich9_generate_nmi(void)
 324 {
 325     cpu_interrupt(first_cpu, CPU_INTERRUPT_NMI);
 326 }
 327
 328 static int ich9_lpc_sci_irq(ICH9LPCState *lpc)
 329 {
 330     switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] &
 331             ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK) {
 332     case ICH9_LPC_ACPI_CTRL_9:
 333         return 9;
 334     case ICH9_LPC_ACPI_CTRL_10:
 335         return 10;
 336     case ICH9_LPC_ACPI_CTRL_11:
 337         return 11;
 338     case ICH9_LPC_ACPI_CTRL_20:
 339         return 20;
 340     case ICH9_LPC_ACPI_CTRL_21:
 341         return 21;
 342     default:
 343         /* reserved */
 344         break;
 345     }
 346     return -1;
 347 }
 348
 349 static void ich9_set_sci(void *opaque, int irq_num, int level)
 350 {
 351     ICH9LPCState *lpc = opaque;
 352     int irq;
 353
 354     assert(irq_num == 0);
 355     level = !!level;
 356     if (level == lpc->sci_level) {
 357         return;
 358     }
 359     lpc->sci_level = level;
 360
 361     irq = ich9_lpc_sci_irq(lpc);
 362     if (irq < 0) {
 363         return;
 364     }
 365
 366     ich9_lpc_update_apic(lpc, irq);
 367     if (irq < ICH9_LPC_PIC_NUM_PINS) {
 368         ich9_lpc_update_pic(lpc, irq);
 369     }
 370 }
 371
 372 void ich9_lpc_pm_init(PCIDevice *lpc_pci, bool smm_enabled, bool enable_tco)
 373 {
 374     ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pci);
 375     qemu_irq sci_irq;
 376
 377     sci_irq = qemu_allocate_irq(ich9_set_sci, lpc, 0);
 378     ich9_pm_init(lpc_pci, &lpc->pm, smm_enabled, enable_tco, sci_irq);
 379     ich9_lpc_reset(&lpc->d.qdev);
 380 }
 381
 382 /* APM */
 383
 384 static void ich9_apm_ctrl_changed(uint32_t val, void *arg)
 385 {
 386     ICH9LPCState *lpc = arg;
 387
 388     /* ACPI specs 3.0, 4.7.2.5 */
 389     acpi_pm1_cnt_update(&lpc->pm.acpi_regs,
 390                         val == ICH9_APM_ACPI_ENABLE,
 391                         val == ICH9_APM_ACPI_DISABLE);
 392     if (val == ICH9_APM_ACPI_ENABLE || val == ICH9_APM_ACPI_DISABLE) {
 393         return;
 394     }
 395
 396     /* SMI_EN = PMBASE + 30. SMI control and enable register */
 397     if (lpc->pm.smi_en & ICH9_PMIO_SMI_EN_APMC_EN) {
 398         cpu_interrupt(current_cpu, CPU_INTERRUPT_SMI);
 399     }
 400 }
 401
 402 /* config:PMBASE */
 403 static void
 404 ich9_lpc_pmbase_update(ICH9LPCState *lpc)
 405 {
 406     uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE);
 407     pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK;
 408
 409     ich9_pm_iospace_update(&lpc->pm, pm_io_base);
 410 }
 411
 412 /* config:RBCA */
 413 static void ich9_lpc_rcba_update(ICH9LPCState *lpc, uint32_t rbca_old)
 414 {
 415     uint32_t rbca = pci_get_long(lpc->d.config + ICH9_LPC_RCBA);
 416
 417     if (rbca_old & ICH9_LPC_RCBA_EN) {
 418             memory_region_del_subregion(get_system_memory(), &lpc->rbca_mem);
 419     }
 420     if (rbca & ICH9_LPC_RCBA_EN) {
 421             memory_region_add_subregion_overlap(get_system_memory(),
 422                                                 rbca & ICH9_LPC_RCBA_BA_MASK,
 423                                                 &lpc->rbca_mem, 1);
 424     }
 425 }
 426
 427 /* config:GEN_PMCON* */
 428 static void
 429 ich9_lpc_pmcon_update(ICH9LPCState *lpc)
 430 {
 431     uint16_t gen_pmcon_1 = pci_get_word(lpc->d.config + ICH9_LPC_GEN_PMCON_1);
 432     uint16_t wmask;
 433
 434     if (gen_pmcon_1 & ICH9_LPC_GEN_PMCON_1_SMI_LOCK) {
 435         wmask = pci_get_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1);
 436         wmask &= ~ICH9_LPC_GEN_PMCON_1_SMI_LOCK;
 437         pci_set_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1, wmask);
 438         lpc->pm.smi_en_wmask &= ~1;
 439     }
 440 }
 441
 442 static int ich9_lpc_post_load(void *opaque, int version_id)
 443 {
 444     ICH9LPCState *lpc = opaque;
 445
 446     ich9_lpc_pmbase_update(lpc);
 447     ich9_lpc_rcba_update(lpc, 0 /* disabled ICH9_LPC_RBCA_EN */);
 448     ich9_lpc_pmcon_update(lpc);
 449     return 0;
 450 }
 451
 452 static void ich9_lpc_config_write(PCIDevice *d,
 453                                   uint32_t addr, uint32_t val, int len)
 454 {
 455     ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
 456     uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA);
 457
 458     pci_default_write_config(d, addr, val, len);
 459     if (ranges_overlap(addr, len, ICH9_LPC_PMBASE, 4)) {
 460         ich9_lpc_pmbase_update(lpc);
 461     }
 462     if (ranges_overlap(addr, len, ICH9_LPC_RCBA, 4)) {
 463         ich9_lpc_rcba_update(lpc, rbca_old);
 464     }
 465     if (ranges_overlap(addr, len, ICH9_LPC_PIRQA_ROUT, 4)) {
 466         pci_bus_fire_intx_routing_notifier(lpc->d.bus);
 467     }
 468     if (ranges_overlap(addr, len, ICH9_LPC_PIRQE_ROUT, 4)) {
 469         pci_bus_fire_intx_routing_notifier(lpc->d.bus);
 470     }
 471     if (ranges_overlap(addr, len, ICH9_LPC_GEN_PMCON_1, 8)) {
 472         ich9_lpc_pmcon_update(lpc);
 473     }
 474 }
 475
 476 static void ich9_lpc_reset(DeviceState *qdev)
 477 {
 478     PCIDevice *d = PCI_DEVICE(qdev);
 479     ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
 480     uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA);
 481     int i;
 482
 483     for (i = 0; i < 4; i++) {
 484         pci_set_byte(d->config + ICH9_LPC_PIRQA_ROUT + i,
 485                      ICH9_LPC_PIRQ_ROUT_DEFAULT);
 486     }
 487     for (i = 0; i < 4; i++) {
 488         pci_set_byte(d->config + ICH9_LPC_PIRQE_ROUT + i,
 489                      ICH9_LPC_PIRQ_ROUT_DEFAULT);
 490     }
 491     pci_set_byte(d->config + ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_DEFAULT);
 492
 493     pci_set_long(d->config + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_DEFAULT);
 494     pci_set_long(d->config + ICH9_LPC_RCBA, ICH9_LPC_RCBA_DEFAULT);
 495
 496     ich9_cc_reset(lpc);
 497
 498     ich9_lpc_pmbase_update(lpc);
 499     ich9_lpc_rcba_update(lpc, rbca_old);
 500
 501     lpc->sci_level = 0;
 502     lpc->rst_cnt = 0;
 503 }
 504
 505 static const MemoryRegionOps rbca_mmio_ops = {
 506     .read = ich9_cc_read,
 507     .write = ich9_cc_write,
 508     .endianness = DEVICE_LITTLE_ENDIAN,
 509 };
 510
 511 static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
 512 {
 513     ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
 514     MemoryRegion *io_as = pci_address_space_io(&s->d);
 515     uint8_t *pci_conf;
 516
 517     pci_conf = s->d.config;
 518     if (memory_region_present(io_as, 0x3f8)) {
 519         /* com1 */
 520         pci_conf[0x82] |= 0x01;
 521     }
 522     if (memory_region_present(io_as, 0x2f8)) {
 523         /* com2 */
 524         pci_conf[0x82] |= 0x02;
 525     }
 526     if (memory_region_present(io_as, 0x378)) {
 527         /* lpt */
 528         pci_conf[0x82] |= 0x04;
 529     }
 530     if (memory_region_present(io_as, 0x3f2)) {
 531         /* floppy */
 532         pci_conf[0x82] |= 0x08;
 533     }
 534 }
 535
 536 /* reset control */
 537 static void ich9_rst_cnt_write(void *opaque, hwaddr addr, uint64_t val,
 538                                unsigned len)
 539 {
 540     ICH9LPCState *lpc = opaque;
 541
 542     if (val & 4) {
 543         qemu_system_reset_request();
 544         return;
 545     }
 546     lpc->rst_cnt = val & 0xA; /* keep FULL_RST (bit 3) and SYS_RST (bit 1) */
 547 }
 548
 549 static uint64_t ich9_rst_cnt_read(void *opaque, hwaddr addr, unsigned len)
 550 {
 551     ICH9LPCState *lpc = opaque;
 552
 553     return lpc->rst_cnt;
 554 }
 555
 556 static const MemoryRegionOps ich9_rst_cnt_ops = {
 557     .read = ich9_rst_cnt_read,
 558     .write = ich9_rst_cnt_write,
 559     .endianness = DEVICE_LITTLE_ENDIAN
 560 };
 561
 562 Object *ich9_lpc_find(void)
 563 {
 564     bool ambig;
 565     Object *o = object_resolve_path_type("", TYPE_ICH9_LPC_DEVICE, &ambig);
 566
 567     if (ambig) {
 568         return NULL;
 569     }
 570     return o;
 571 }
 572
 573 static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
 574                                  void *opaque, Error **errp)
 575 {
 576     ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
 577     uint32_t value = ich9_lpc_sci_irq(lpc);
 578
 579     visit_type_uint32(v, name, &value, errp);
 580 }
 581
 582 static void ich9_lpc_add_properties(ICH9LPCState *lpc)
 583 {
 584     static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
 585     static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
 586
 587     object_property_add(OBJECT(lpc), ACPI_PM_PROP_SCI_INT, "uint32",
 588                         ich9_lpc_get_sci_int,
 589                         NULL, NULL, NULL, NULL);
 590     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
 591                                   &acpi_enable_cmd, NULL);
 592     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
 593                                   &acpi_disable_cmd, NULL);
 594
 595     ich9_pm_add_properties(OBJECT(lpc), &lpc->pm, NULL);
 596 }
 597
 598 static void ich9_lpc_initfn(Object *obj)
 599 {
 600     ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
 601
 602     ich9_lpc_add_properties(lpc);
 603 }
 604
 605 static void ich9_lpc_realize(PCIDevice *d, Error **errp)
 606 {
 607     ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
 608     ISABus *isa_bus;
 609
 610     isa_bus = isa_bus_new(DEVICE(d), get_system_memory(), get_system_io(),
 611                           errp);
 612     if (!isa_bus) {
 613         return;
 614     }
 615
 616     pci_set_long(d->wmask + ICH9_LPC_PMBASE,
 617                  ICH9_LPC_PMBASE_BASE_ADDRESS_MASK);
 618
 619     memory_region_init_io(&lpc->rbca_mem, OBJECT(d), &rbca_mmio_ops, lpc,
 620                             "lpc-rbca-mmio", ICH9_CC_SIZE);
 621
 622     lpc->isa_bus = isa_bus;
 623
 624     ich9_cc_init(lpc);
 625     apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc);
 626
 627     lpc->machine_ready.notify = ich9_lpc_machine_ready;
 628     qemu_add_machine_init_done_notifier(&lpc->machine_ready);
 629
 630     memory_region_init_io(&lpc->rst_cnt_mem, OBJECT(d), &ich9_rst_cnt_ops, lpc,
 631                           "lpc-reset-control", 1);
 632     memory_region_add_subregion_overlap(pci_address_space_io(d),
 633                                         ICH9_RST_CNT_IOPORT, &lpc->rst_cnt_mem,
 634                                         1);
 635 }
 636
 637 static void ich9_device_plug_cb(HotplugHandler *hotplug_dev,
 638                                 DeviceState *dev, Error **errp)
 639 {
 640     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
 641
 642     ich9_pm_device_plug_cb(&lpc->pm, dev, errp);
 643 }
 644
 645 static void ich9_device_unplug_request_cb(HotplugHandler *hotplug_dev,
 646                                           DeviceState *dev, Error **errp)
 647 {
 648     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
 649
 650     ich9_pm_device_unplug_request_cb(&lpc->pm, dev, errp);
 651 }
 652
 653 static void ich9_device_unplug_cb(HotplugHandler *hotplug_dev,
 654                                   DeviceState *dev, Error **errp)
 655 {
 656     ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev);
 657
 658     ich9_pm_device_unplug_cb(&lpc->pm, dev, errp);
 659 }
 660
 661 static bool ich9_rst_cnt_needed(void *opaque)
 662 {
 663     ICH9LPCState *lpc = opaque;
 664
 665     return (lpc->rst_cnt != 0);
 666 }
 667
 668 static const VMStateDescription vmstate_ich9_rst_cnt = {
 669     .name = "ICH9LPC/rst_cnt",
 670     .version_id = 1,
 671     .minimum_version_id = 1,
 672     .needed = ich9_rst_cnt_needed,
 673     .fields = (VMStateField[]) {
 674         VMSTATE_UINT8(rst_cnt, ICH9LPCState),
 675         VMSTATE_END_OF_LIST()
 676     }
 677 };
 678
 679 static const VMStateDescription vmstate_ich9_lpc = {
 680     .name = "ICH9LPC",
 681     .version_id = 1,
 682     .minimum_version_id = 1,
 683     .post_load = ich9_lpc_post_load,
 684     .fields = (VMStateField[]) {
 685         VMSTATE_PCI_DEVICE(d, ICH9LPCState),
 686         VMSTATE_STRUCT(apm, ICH9LPCState, 0, vmstate_apm, APMState),
 687         VMSTATE_STRUCT(pm, ICH9LPCState, 0, vmstate_ich9_pm, ICH9LPCPMRegs),
 688         VMSTATE_UINT8_ARRAY(chip_config, ICH9LPCState, ICH9_CC_SIZE),
 689         VMSTATE_UINT32(sci_level, ICH9LPCState),
 690         VMSTATE_END_OF_LIST()
 691     },
 692     .subsections = (const VMStateDescription*[]) {
 693         &vmstate_ich9_rst_cnt,
 694         NULL
 695     }
 696 };
 697
 698 static Property ich9_lpc_properties[] = {
 699     DEFINE_PROP_BOOL("noreboot", ICH9LPCState, pin_strap.spkr_hi, true),
 700     DEFINE_PROP_END_OF_LIST(),
 701 };
 702
 703 static void ich9_lpc_class_init(ObjectClass *klass, void *data)
 704 {
 705     DeviceClass *dc = DEVICE_CLASS(klass);
 706     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 707     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 708     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
 709
 710     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 711     dc->reset = ich9_lpc_reset;
 712     k->realize = ich9_lpc_realize;
 713     dc->vmsd = &vmstate_ich9_lpc;
 714     dc->props = ich9_lpc_properties;
 715     k->config_write = ich9_lpc_config_write;
 716     dc->desc = "ICH9 LPC bridge";
 717     k->vendor_id = PCI_VENDOR_ID_INTEL;
 718     k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8;
 719     k->revision = ICH9_A2_LPC_REVISION;
 720     k->class_id = PCI_CLASS_BRIDGE_ISA;
 721     /*
 722      * Reason: part of ICH9 southbridge, needs to be wired up by
 723      * pc_q35_init()
 724      */
 725     dc->cannot_instantiate_with_device_add_yet = true;
 726     hc->plug = ich9_device_plug_cb;
 727     hc->unplug_request = ich9_device_unplug_request_cb;
 728     hc->unplug = ich9_device_unplug_cb;
 729     adevc->ospm_status = ich9_pm_ospm_status;
 730 }
 731
 732 static const TypeInfo ich9_lpc_info = {
 733     .name       = TYPE_ICH9_LPC_DEVICE,
 734     .parent     = TYPE_PCI_DEVICE,
 735     .instance_size = sizeof(struct ICH9LPCState),
 736     .instance_init = ich9_lpc_initfn,
 737     .class_init  = ich9_lpc_class_init,
 738     .interfaces = (InterfaceInfo[]) {
 739         { TYPE_HOTPLUG_HANDLER },
 740         { TYPE_ACPI_DEVICE_IF },
 741         { }
 742     }
 743 };
 744
 745 static void ich9_lpc_register(void)
 746 {
 747     type_register_static(&ich9_lpc_info);
 748 }
 749
 750 type_init(ich9_lpc_register);