hw/acpi_piix4.c

   1 /*
   2  * ACPI implementation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License version 2 as published by the Free Software Foundation.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  17  *
  18  * Contributions after 2012-01-13 are licensed under the terms of the
  19  * GNU GPL, version 2 or (at your option) any later version.
  20  */
  21 #include "hw.h"
  22 #include "pc.h"
  23 #include "apm.h"
  24 #include "pm_smbus.h"
  25 #include "pci.h"
  26 #include "acpi.h"
  27 #include "sysemu.h"
  28 #include "range.h"
  29 #include "ioport.h"
  30
  31 //#define DEBUG
  32
  33 #ifdef DEBUG
  34 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  35 #else
  36 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  37 #endif
  38
  39 #define ACPI_DBG_IO_ADDR  0xb044
  40
  41 #define GPE_BASE 0xafe0
  42 #define GPE_LEN 4
  43 #define PCI_UP_BASE 0xae00
  44 #define PCI_DOWN_BASE 0xae04
  45 #define PCI_EJ_BASE 0xae08
  46 #define PCI_RMV_BASE 0xae0c
  47
  48 #define PIIX4_PCI_HOTPLUG_STATUS 2
  49
  50 struct pci_status {
  51     uint32_t up; /* deprecated, maintained for migration compatibility */
  52     uint32_t down;
  53 };
  54
  55 typedef struct PIIX4PMState {
  56     PCIDevice dev;
  57     IORange ioport;
  58     ACPIREGS ar;
  59
  60     APMState apm;
  61
  62     PMSMBus smb;
  63     uint32_t smb_io_base;
  64
  65     qemu_irq irq;
  66     qemu_irq smi_irq;
  67     int kvm_enabled;
  68     Notifier machine_ready;
  69
  70     /* for pci hotplug */
  71     struct pci_status pci0_status;
  72     uint32_t pci0_hotplug_enable;
  73     uint32_t pci0_slot_device_present;
  74 } PIIX4PMState;
  75
  76 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
  77
  78 #define ACPI_ENABLE 0xf1
  79 #define ACPI_DISABLE 0xf0
  80
  81 static void pm_update_sci(PIIX4PMState *s)
  82 {
  83     int sci_level, pmsts;
  84
  85     pmsts = acpi_pm1_evt_get_sts(&s->ar);
  86     sci_level = (((pmsts & s->ar.pm1.evt.en) &
  87                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
  88                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
  89                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
  90                    ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
  91         (((s->ar.gpe.sts[0] & s->ar.gpe.en[0])
  92           & PIIX4_PCI_HOTPLUG_STATUS) != 0);
  93
  94     qemu_set_irq(s->irq, sci_level);
  95     /* schedule a timer interruption if needed */
  96     acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
  97                        !(pmsts & ACPI_BITMASK_TIMER_STATUS));
  98 }
  99
 100 static void pm_tmr_timer(ACPIREGS *ar)
 101 {
 102     PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
 103     pm_update_sci(s);
 104 }
 105
 106 static void pm_ioport_write(IORange *ioport, uint64_t addr, unsigned width,
 107                             uint64_t val)
 108 {
 109     PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
 110
 111     if (width != 2) {
 112         PIIX4_DPRINTF("PM write port=0x%04x width=%d val=0x%08x\n",
 113                       (unsigned)addr, width, (unsigned)val);
 114     }
 115
 116     switch(addr) {
 117     case 0x00:
 118         acpi_pm1_evt_write_sts(&s->ar, val);
 119         pm_update_sci(s);
 120         break;
 121     case 0x02:
 122         acpi_pm1_evt_write_en(&s->ar, val);
 123         pm_update_sci(s);
 124         break;
 125     case 0x04:
 126         acpi_pm1_cnt_write(&s->ar, val);
 127         break;
 128     default:
 129         break;
 130     }
 131     PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", (unsigned int)addr,
 132                   (unsigned int)val);
 133 }
 134
 135 static void pm_ioport_read(IORange *ioport, uint64_t addr, unsigned width,
 136                             uint64_t *data)
 137 {
 138     PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
 139     uint32_t val;
 140
 141     switch(addr) {
 142     case 0x00:
 143         val = acpi_pm1_evt_get_sts(&s->ar);
 144         break;
 145     case 0x02:
 146         val = s->ar.pm1.evt.en;
 147         break;
 148     case 0x04:
 149         val = s->ar.pm1.cnt.cnt;
 150         break;
 151     case 0x08:
 152         val = acpi_pm_tmr_get(&s->ar);
 153         break;
 154     default:
 155         val = 0;
 156         break;
 157     }
 158     PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", (unsigned int)addr, val);
 159     *data = val;
 160 }
 161
 162 static const IORangeOps pm_iorange_ops = {
 163     .read = pm_ioport_read,
 164     .write = pm_ioport_write,
 165 };
 166
 167 static void apm_ctrl_changed(uint32_t val, void *arg)
 168 {
 169     PIIX4PMState *s = arg;
 170
 171     /* ACPI specs 3.0, 4.7.2.5 */
 172     acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
 173
 174     if (s->dev.config[0x5b] & (1 << 1)) {
 175         if (s->smi_irq) {
 176             qemu_irq_raise(s->smi_irq);
 177         }
 178     }
 179 }
 180
 181 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
 182 {
 183     PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
 184 }
 185
 186 static void pm_io_space_update(PIIX4PMState *s)
 187 {
 188     uint32_t pm_io_base;
 189
 190     if (s->dev.config[0x80] & 1) {
 191         pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
 192         pm_io_base &= 0xffc0;
 193
 194         /* XXX: need to improve memory and ioport allocation */
 195         PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
 196         iorange_init(&s->ioport, &pm_iorange_ops, pm_io_base, 64);
 197         ioport_register(&s->ioport);
 198     }
 199 }
 200
 201 static void pm_write_config(PCIDevice *d,
 202                             uint32_t address, uint32_t val, int len)
 203 {
 204     pci_default_write_config(d, address, val, len);
 205     if (range_covers_byte(address, len, 0x80))
 206         pm_io_space_update((PIIX4PMState *)d);
 207 }
 208
 209 static void vmstate_pci_status_pre_save(void *opaque)
 210 {
 211     struct pci_status *pci0_status = opaque;
 212     PIIX4PMState *s = container_of(pci0_status, PIIX4PMState, pci0_status);
 213
 214     /* We no longer track up, so build a safe value for migrating
 215      * to a version that still does... of course these might get lost
 216      * by an old buggy implementation, but we try. */
 217     pci0_status->up = s->pci0_slot_device_present & s->pci0_hotplug_enable;
 218 }
 219
 220 static int vmstate_acpi_post_load(void *opaque, int version_id)
 221 {
 222     PIIX4PMState *s = opaque;
 223
 224     pm_io_space_update(s);
 225     return 0;
 226 }
 227
 228 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 229  {                                                                   \
 230      .name       = (stringify(_field)),                              \
 231      .version_id = 0,                                                \
 232      .num        = GPE_LEN,                                          \
 233      .info       = &vmstate_info_uint16,                             \
 234      .size       = sizeof(uint16_t),                                 \
 235      .flags      = VMS_ARRAY | VMS_POINTER,                          \
 236      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 237  }
 238
 239 static const VMStateDescription vmstate_gpe = {
 240     .name = "gpe",
 241     .version_id = 1,
 242     .minimum_version_id = 1,
 243     .minimum_version_id_old = 1,
 244     .fields      = (VMStateField []) {
 245         VMSTATE_GPE_ARRAY(sts, ACPIGPE),
 246         VMSTATE_GPE_ARRAY(en, ACPIGPE),
 247         VMSTATE_END_OF_LIST()
 248     }
 249 };
 250
 251 static const VMStateDescription vmstate_pci_status = {
 252     .name = "pci_status",
 253     .version_id = 1,
 254     .minimum_version_id = 1,
 255     .minimum_version_id_old = 1,
 256     .pre_save = vmstate_pci_status_pre_save,
 257     .fields      = (VMStateField []) {
 258         VMSTATE_UINT32(up, struct pci_status),
 259         VMSTATE_UINT32(down, struct pci_status),
 260         VMSTATE_END_OF_LIST()
 261     }
 262 };
 263
 264 static const VMStateDescription vmstate_acpi = {
 265     .name = "piix4_pm",
 266     .version_id = 2,
 267     .minimum_version_id = 1,
 268     .minimum_version_id_old = 1,
 269     .post_load = vmstate_acpi_post_load,
 270     .fields      = (VMStateField []) {
 271         VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
 272         VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
 273         VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
 274         VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
 275         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 276         VMSTATE_TIMER(ar.tmr.timer, PIIX4PMState),
 277         VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
 278         VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 279         VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
 280                        struct pci_status),
 281         VMSTATE_END_OF_LIST()
 282     }
 283 };
 284
 285 static void acpi_piix_eject_slot(PIIX4PMState *s, unsigned slots)
 286 {
 287     DeviceState *qdev, *next;
 288     BusState *bus = qdev_get_parent_bus(&s->dev.qdev);
 289     int slot = ffs(slots) - 1;
 290
 291     /* Mark request as complete */
 292     s->pci0_status.down &= ~(1U << slot);
 293
 294     QTAILQ_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
 295         PCIDevice *dev = PCI_DEVICE(qdev);
 296         PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
 297         if (PCI_SLOT(dev->devfn) == slot && !pc->no_hotplug) {
 298             s->pci0_slot_device_present &= ~(1U << slot);
 299             qdev_free(qdev);
 300         }
 301     }
 302 }
 303
 304 static void piix4_update_hotplug(PIIX4PMState *s)
 305 {
 306     PCIDevice *dev = &s->dev;
 307     BusState *bus = qdev_get_parent_bus(&dev->qdev);
 308     DeviceState *qdev, *next;
 309
 310     /* Execute any pending removes during reset */
 311     while (s->pci0_status.down) {
 312         acpi_piix_eject_slot(s, s->pci0_status.down);
 313     }
 314
 315     s->pci0_hotplug_enable = ~0;
 316     s->pci0_slot_device_present = 0;
 317
 318     QTAILQ_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
 319         PCIDevice *pdev = PCI_DEVICE(qdev);
 320         PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pdev);
 321         int slot = PCI_SLOT(pdev->devfn);
 322
 323         if (pc->no_hotplug) {
 324             s->pci0_hotplug_enable &= ~(1U << slot);
 325         }
 326
 327         s->pci0_slot_device_present |= (1U << slot);
 328     }
 329 }
 330
 331 static void piix4_reset(void *opaque)
 332 {
 333     PIIX4PMState *s = opaque;
 334     uint8_t *pci_conf = s->dev.config;
 335
 336     pci_conf[0x58] = 0;
 337     pci_conf[0x59] = 0;
 338     pci_conf[0x5a] = 0;
 339     pci_conf[0x5b] = 0;
 340
 341     if (s->kvm_enabled) {
 342         /* Mark SMM as already inited (until KVM supports SMM). */
 343         pci_conf[0x5B] = 0x02;
 344     }
 345     piix4_update_hotplug(s);
 346 }
 347
 348 static void piix4_powerdown(void *opaque, int irq, int power_failing)
 349 {
 350     PIIX4PMState *s = opaque;
 351
 352     assert(s != NULL);
 353     acpi_pm1_evt_power_down(&s->ar);
 354 }
 355
 356 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 357 {
 358     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 359     uint8_t *pci_conf;
 360
 361     pci_conf = s->dev.config;
 362     pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10;
 363     pci_conf[0x63] = 0x60;
 364     pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) |
 365         (isa_is_ioport_assigned(0x2f8) ? 0x90 : 0);
 366
 367 }
 368
 369 static int piix4_pm_initfn(PCIDevice *dev)
 370 {
 371     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
 372     uint8_t *pci_conf;
 373
 374     pci_conf = s->dev.config;
 375     pci_conf[0x06] = 0x80;
 376     pci_conf[0x07] = 0x02;
 377     pci_conf[0x09] = 0x00;
 378     pci_conf[0x3d] = 0x01; // interrupt pin 1
 379
 380     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 381
 382     /* APM */
 383     apm_init(&s->apm, apm_ctrl_changed, s);
 384
 385     register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
 386
 387     if (s->kvm_enabled) {
 388         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 389          * support SMM mode. */
 390         pci_conf[0x5B] = 0x02;
 391     }
 392
 393     /* XXX: which specification is used ? The i82731AB has different
 394        mappings */
 395     pci_conf[0x90] = s->smb_io_base | 1;
 396     pci_conf[0x91] = s->smb_io_base >> 8;
 397     pci_conf[0xd2] = 0x09;
 398     register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
 399     register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
 400
 401     acpi_pm_tmr_init(&s->ar, pm_tmr_timer);
 402     acpi_gpe_init(&s->ar, GPE_LEN);
 403
 404     qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
 405
 406     pm_smbus_init(&s->dev.qdev, &s->smb);
 407     s->machine_ready.notify = piix4_pm_machine_ready;
 408     qemu_add_machine_init_done_notifier(&s->machine_ready);
 409     qemu_register_reset(piix4_reset, s);
 410     piix4_acpi_system_hot_add_init(dev->bus, s);
 411
 412     return 0;
 413 }
 414
 415 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 416                        qemu_irq sci_irq, qemu_irq smi_irq,
 417                        int kvm_enabled)
 418 {
 419     PCIDevice *dev;
 420     PIIX4PMState *s;
 421
 422     dev = pci_create(bus, devfn, "PIIX4_PM");
 423     qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
 424
 425     s = DO_UPCAST(PIIX4PMState, dev, dev);
 426     s->irq = sci_irq;
 427     acpi_pm1_cnt_init(&s->ar);
 428     s->smi_irq = smi_irq;
 429     s->kvm_enabled = kvm_enabled;
 430
 431     qdev_init_nofail(&dev->qdev);
 432
 433     return s->smb.smbus;
 434 }
 435
 436 static Property piix4_pm_properties[] = {
 437     DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 438     DEFINE_PROP_END_OF_LIST(),
 439 };
 440
 441 static void piix4_pm_class_init(ObjectClass *klass, void *data)
 442 {
 443     DeviceClass *dc = DEVICE_CLASS(klass);
 444     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 445
 446     k->no_hotplug = 1;
 447     k->init = piix4_pm_initfn;
 448     k->config_write = pm_write_config;
 449     k->vendor_id = PCI_VENDOR_ID_INTEL;
 450     k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
 451     k->revision = 0x03;
 452     k->class_id = PCI_CLASS_BRIDGE_OTHER;
 453     dc->desc = "PM";
 454     dc->no_user = 1;
 455     dc->vmsd = &vmstate_acpi;
 456     dc->props = piix4_pm_properties;
 457 }
 458
 459 static TypeInfo piix4_pm_info = {
 460     .name          = "PIIX4_PM",
 461     .parent        = TYPE_PCI_DEVICE,
 462     .instance_size = sizeof(PIIX4PMState),
 463     .class_init    = piix4_pm_class_init,
 464 };
 465
 466 static void piix4_pm_register_types(void)
 467 {
 468     type_register_static(&piix4_pm_info);
 469 }
 470
 471 type_init(piix4_pm_register_types)
 472
 473 static uint32_t gpe_readb(void *opaque, uint32_t addr)
 474 {
 475     PIIX4PMState *s = opaque;
 476     uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
 477
 478     PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
 479     return val;
 480 }
 481
 482 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
 483 {
 484     PIIX4PMState *s = opaque;
 485
 486     acpi_gpe_ioport_writeb(&s->ar, addr, val);
 487     pm_update_sci(s);
 488
 489     PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
 490 }
 491
 492 static uint32_t pci_up_read(void *opaque, uint32_t addr)
 493 {
 494     PIIX4PMState *s = opaque;
 495     uint32_t val;
 496
 497     /* Manufacture an "up" value to cause a device check on any hotplug
 498      * slot with a device.  Extra device checks are harmless. */
 499     val = s->pci0_slot_device_present & s->pci0_hotplug_enable;
 500
 501     PIIX4_DPRINTF("pci_up_read %x\n", val);
 502     return val;
 503 }
 504
 505 static uint32_t pci_down_read(void *opaque, uint32_t addr)
 506 {
 507     PIIX4PMState *s = opaque;
 508     uint32_t val = s->pci0_status.down;
 509
 510     PIIX4_DPRINTF("pci_down_read %x\n", val);
 511     return val;
 512 }
 513
 514 static uint32_t pciej_read(void *opaque, uint32_t addr)
 515 {
 516     PIIX4_DPRINTF("pciej read %x\n", addr);
 517     return 0;
 518 }
 519
 520 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
 521 {
 522     acpi_piix_eject_slot(opaque, val);
 523
 524     PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
 525 }
 526
 527 static uint32_t pcirmv_read(void *opaque, uint32_t addr)
 528 {
 529     PIIX4PMState *s = opaque;
 530
 531     return s->pci0_hotplug_enable;
 532 }
 533
 534 static void pcirmv_write(void *opaque, uint32_t addr, uint32_t val)
 535 {
 536     return;
 537 }
 538
 539 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
 540                                 PCIHotplugState state);
 541
 542 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
 543 {
 544
 545     register_ioport_write(GPE_BASE, GPE_LEN, 1, gpe_writeb, s);
 546     register_ioport_read(GPE_BASE, GPE_LEN, 1,  gpe_readb, s);
 547     acpi_gpe_blk(&s->ar, GPE_BASE);
 548
 549     register_ioport_read(PCI_UP_BASE, 4, 4, pci_up_read, s);
 550     register_ioport_read(PCI_DOWN_BASE, 4, 4, pci_down_read, s);
 551
 552     register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, s);
 553     register_ioport_read(PCI_EJ_BASE, 4, 4,  pciej_read, s);
 554
 555     register_ioport_write(PCI_RMV_BASE, 4, 4, pcirmv_write, s);
 556     register_ioport_read(PCI_RMV_BASE, 4, 4,  pcirmv_read, s);
 557
 558     pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
 559 }
 560
 561 static void enable_device(PIIX4PMState *s, int slot)
 562 {
 563     s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
 564     s->pci0_slot_device_present |= (1U << slot);
 565 }
 566
 567 static void disable_device(PIIX4PMState *s, int slot)
 568 {
 569     s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
 570     s->pci0_status.down |= (1U << slot);
 571 }
 572
 573 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
 574                                 PCIHotplugState state)
 575 {
 576     int slot = PCI_SLOT(dev->devfn);
 577     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
 578                                 PCI_DEVICE(qdev));
 579
 580     /* Don't send event when device is enabled during qemu machine creation:
 581      * it is present on boot, no hotplug event is necessary. We do send an
 582      * event when the device is disabled later. */
 583     if (state == PCI_COLDPLUG_ENABLED) {
 584         s->pci0_slot_device_present |= (1U << slot);
 585         return 0;
 586     }
 587
 588     if (state == PCI_HOTPLUG_ENABLED) {
 589         enable_device(s, slot);
 590     } else {
 591         disable_device(s, slot);
 592     }
 593
 594     pm_update_sci(s);
 595
 596     return 0;
 597 }