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 #include "hw.h"
  19 #include "pc.h"
  20 #include "apm.h"
  21 #include "pm_smbus.h"
  22 #include "pci.h"
  23 #include "acpi.h"
  24 #include "sysemu.h"
  25 #include "range.h"
  26 #include "ioport.h"
  27
  28 //#define DEBUG
  29
  30 #ifdef DEBUG
  31 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  32 #else
  33 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  34 #endif
  35
  36 #define ACPI_DBG_IO_ADDR  0xb044
  37
  38 #define GPE_BASE 0xafe0
  39 #define GPE_LEN 4
  40 #define PCI_BASE 0xae00
  41 #define PCI_EJ_BASE 0xae08
  42 #define PCI_RMV_BASE 0xae0c
  43
  44 #define PIIX4_PCI_HOTPLUG_STATUS 2
  45
  46 struct pci_status {
  47     uint32_t up;
  48     uint32_t down;
  49 };
  50
  51 typedef struct PIIX4PMState {
  52     PCIDevice dev;
  53     IORange ioport;
  54     ACPIPM1EVT pm1a;
  55     ACPIPM1CNT pm1_cnt;
  56
  57     APMState apm;
  58
  59     ACPIPMTimer tmr;
  60
  61     PMSMBus smb;
  62     uint32_t smb_io_base;
  63
  64     qemu_irq irq;
  65     qemu_irq smi_irq;
  66     int kvm_enabled;
  67     Notifier machine_ready;
  68
  69     /* for pci hotplug */
  70     ACPIGPE gpe;
  71     struct pci_status pci0_status;
  72     uint32_t pci0_hotplug_enable;
  73 } PIIX4PMState;
  74
  75 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
  76
  77 #define ACPI_ENABLE 0xf1
  78 #define ACPI_DISABLE 0xf0
  79
  80 static void pm_update_sci(PIIX4PMState *s)
  81 {
  82     int sci_level, pmsts;
  83
  84     pmsts = acpi_pm1_evt_get_sts(&s->pm1a, s->tmr.overflow_time);
  85     sci_level = (((pmsts & s->pm1a.en) &
  86                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
  87                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
  88                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
  89                    ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
  90         (((s->gpe.sts[0] & s->gpe.en[0]) & PIIX4_PCI_HOTPLUG_STATUS) != 0);
  91
  92     qemu_set_irq(s->irq, sci_level);
  93     /* schedule a timer interruption if needed */
  94     acpi_pm_tmr_update(&s->tmr, (s->pm1a.en & ACPI_BITMASK_TIMER_ENABLE) &&
  95                        !(pmsts & ACPI_BITMASK_TIMER_STATUS));
  96 }
  97
  98 static void pm_tmr_timer(ACPIPMTimer *tmr)
  99 {
 100     PIIX4PMState *s = container_of(tmr, PIIX4PMState, tmr);
 101     pm_update_sci(s);
 102 }
 103
 104 static void pm_ioport_write(IORange *ioport, uint64_t addr, unsigned width,
 105                             uint64_t val)
 106 {
 107     PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
 108
 109     if (width != 2) {
 110         PIIX4_DPRINTF("PM write port=0x%04x width=%d val=0x%08x\n",
 111                       (unsigned)addr, width, (unsigned)val);
 112     }
 113
 114     switch(addr) {
 115     case 0x00:
 116         acpi_pm1_evt_write_sts(&s->pm1a, &s->tmr, val);
 117         pm_update_sci(s);
 118         break;
 119     case 0x02:
 120         s->pm1a.en = val;
 121         pm_update_sci(s);
 122         break;
 123     case 0x04:
 124         acpi_pm1_cnt_write(&s->pm1a, &s->pm1_cnt, val);
 125         break;
 126     default:
 127         break;
 128     }
 129     PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", (unsigned int)addr,
 130                   (unsigned int)val);
 131 }
 132
 133 static void pm_ioport_read(IORange *ioport, uint64_t addr, unsigned width,
 134                             uint64_t *data)
 135 {
 136     PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
 137     uint32_t val;
 138
 139     switch(addr) {
 140     case 0x00:
 141         val = acpi_pm1_evt_get_sts(&s->pm1a, s->tmr.overflow_time);
 142         break;
 143     case 0x02:
 144         val = s->pm1a.en;
 145         break;
 146     case 0x04:
 147         val = s->pm1_cnt.cnt;
 148         break;
 149     case 0x08:
 150         val = acpi_pm_tmr_get(&s->tmr);
 151         break;
 152     default:
 153         val = 0;
 154         break;
 155     }
 156     PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", (unsigned int)addr, val);
 157     *data = val;
 158 }
 159
 160 static const IORangeOps pm_iorange_ops = {
 161     .read = pm_ioport_read,
 162     .write = pm_ioport_write,
 163 };
 164
 165 static void apm_ctrl_changed(uint32_t val, void *arg)
 166 {
 167     PIIX4PMState *s = arg;
 168
 169     /* ACPI specs 3.0, 4.7.2.5 */
 170     acpi_pm1_cnt_update(&s->pm1_cnt, val == ACPI_ENABLE, val == ACPI_DISABLE);
 171
 172     if (s->dev.config[0x5b] & (1 << 1)) {
 173         if (s->smi_irq) {
 174             qemu_irq_raise(s->smi_irq);
 175         }
 176     }
 177 }
 178
 179 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
 180 {
 181     PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
 182 }
 183
 184 static void pm_io_space_update(PIIX4PMState *s)
 185 {
 186     uint32_t pm_io_base;
 187
 188     if (s->dev.config[0x80] & 1) {
 189         pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
 190         pm_io_base &= 0xffc0;
 191
 192         /* XXX: need to improve memory and ioport allocation */
 193         PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
 194         iorange_init(&s->ioport, &pm_iorange_ops, pm_io_base, 64);
 195         ioport_register(&s->ioport);
 196     }
 197 }
 198
 199 static void pm_write_config(PCIDevice *d,
 200                             uint32_t address, uint32_t val, int len)
 201 {
 202     pci_default_write_config(d, address, val, len);
 203     if (range_covers_byte(address, len, 0x80))
 204         pm_io_space_update((PIIX4PMState *)d);
 205 }
 206
 207 static int vmstate_acpi_post_load(void *opaque, int version_id)
 208 {
 209     PIIX4PMState *s = opaque;
 210
 211     pm_io_space_update(s);
 212     return 0;
 213 }
 214
 215 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 216  {                                                                   \
 217      .name       = (stringify(_field)),                              \
 218      .version_id = 0,                                                \
 219      .num        = GPE_LEN,                                          \
 220      .info       = &vmstate_info_uint16,                             \
 221      .size       = sizeof(uint16_t),                                 \
 222      .flags      = VMS_ARRAY | VMS_POINTER,                          \
 223      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 224  }
 225
 226 static const VMStateDescription vmstate_gpe = {
 227     .name = "gpe",
 228     .version_id = 1,
 229     .minimum_version_id = 1,
 230     .minimum_version_id_old = 1,
 231     .fields      = (VMStateField []) {
 232         VMSTATE_GPE_ARRAY(sts, ACPIGPE),
 233         VMSTATE_GPE_ARRAY(en, ACPIGPE),
 234         VMSTATE_END_OF_LIST()
 235     }
 236 };
 237
 238 static const VMStateDescription vmstate_pci_status = {
 239     .name = "pci_status",
 240     .version_id = 1,
 241     .minimum_version_id = 1,
 242     .minimum_version_id_old = 1,
 243     .fields      = (VMStateField []) {
 244         VMSTATE_UINT32(up, struct pci_status),
 245         VMSTATE_UINT32(down, struct pci_status),
 246         VMSTATE_END_OF_LIST()
 247     }
 248 };
 249
 250 static const VMStateDescription vmstate_acpi = {
 251     .name = "piix4_pm",
 252     .version_id = 2,
 253     .minimum_version_id = 1,
 254     .minimum_version_id_old = 1,
 255     .post_load = vmstate_acpi_post_load,
 256     .fields      = (VMStateField []) {
 257         VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
 258         VMSTATE_UINT16(pm1a.sts, PIIX4PMState),
 259         VMSTATE_UINT16(pm1a.en, PIIX4PMState),
 260         VMSTATE_UINT16(pm1_cnt.cnt, PIIX4PMState),
 261         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 262         VMSTATE_TIMER(tmr.timer, PIIX4PMState),
 263         VMSTATE_INT64(tmr.overflow_time, PIIX4PMState),
 264         VMSTATE_STRUCT(gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
 265         VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
 266                        struct pci_status),
 267         VMSTATE_END_OF_LIST()
 268     }
 269 };
 270
 271 static void piix4_update_hotplug(PIIX4PMState *s)
 272 {
 273     PCIDevice *dev = &s->dev;
 274     BusState *bus = qdev_get_parent_bus(&dev->qdev);
 275     DeviceState *qdev, *next;
 276
 277     s->pci0_hotplug_enable = ~0;
 278
 279     QTAILQ_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
 280         PCIDeviceInfo *info = container_of(qdev->info, PCIDeviceInfo, qdev);
 281         PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, qdev);
 282         int slot = PCI_SLOT(pdev->devfn);
 283
 284         if (info->no_hotplug) {
 285             s->pci0_hotplug_enable &= ~(1 << slot);
 286         }
 287     }
 288 }
 289
 290 static void piix4_reset(void *opaque)
 291 {
 292     PIIX4PMState *s = opaque;
 293     uint8_t *pci_conf = s->dev.config;
 294
 295     pci_conf[0x58] = 0;
 296     pci_conf[0x59] = 0;
 297     pci_conf[0x5a] = 0;
 298     pci_conf[0x5b] = 0;
 299
 300     if (s->kvm_enabled) {
 301         /* Mark SMM as already inited (until KVM supports SMM). */
 302         pci_conf[0x5B] = 0x02;
 303     }
 304     piix4_update_hotplug(s);
 305 }
 306
 307 static void piix4_powerdown(void *opaque, int irq, int power_failing)
 308 {
 309     PIIX4PMState *s = opaque;
 310     ACPIPM1EVT *pm1a = s? &s->pm1a: NULL;
 311     ACPIPMTimer *tmr = s? &s->tmr: NULL;
 312
 313     acpi_pm1_evt_power_down(pm1a, tmr);
 314 }
 315
 316 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 317 {
 318     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
 319     uint8_t *pci_conf;
 320
 321     pci_conf = s->dev.config;
 322     pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10;
 323     pci_conf[0x63] = 0x60;
 324     pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) |
 325         (isa_is_ioport_assigned(0x2f8) ? 0x90 : 0);
 326
 327 }
 328
 329 static int piix4_pm_initfn(PCIDevice *dev)
 330 {
 331     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
 332     uint8_t *pci_conf;
 333
 334     pci_conf = s->dev.config;
 335     pci_conf[0x06] = 0x80;
 336     pci_conf[0x07] = 0x02;
 337     pci_conf[0x09] = 0x00;
 338     pci_conf[0x3d] = 0x01; // interrupt pin 1
 339
 340     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 341
 342     /* APM */
 343     apm_init(&s->apm, apm_ctrl_changed, s);
 344
 345     register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
 346
 347     if (s->kvm_enabled) {
 348         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 349          * support SMM mode. */
 350         pci_conf[0x5B] = 0x02;
 351     }
 352
 353     /* XXX: which specification is used ? The i82731AB has different
 354        mappings */
 355     pci_conf[0x90] = s->smb_io_base | 1;
 356     pci_conf[0x91] = s->smb_io_base >> 8;
 357     pci_conf[0xd2] = 0x09;
 358     register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
 359     register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
 360
 361     acpi_pm_tmr_init(&s->tmr, pm_tmr_timer);
 362     acpi_gpe_init(&s->gpe, GPE_LEN);
 363
 364     qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
 365
 366     pm_smbus_init(&s->dev.qdev, &s->smb);
 367     s->machine_ready.notify = piix4_pm_machine_ready;
 368     qemu_add_machine_init_done_notifier(&s->machine_ready);
 369     qemu_register_reset(piix4_reset, s);
 370     piix4_acpi_system_hot_add_init(dev->bus, s);
 371
 372     return 0;
 373 }
 374
 375 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 376                        qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
 377                        int kvm_enabled)
 378 {
 379     PCIDevice *dev;
 380     PIIX4PMState *s;
 381
 382     dev = pci_create(bus, devfn, "PIIX4_PM");
 383     qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
 384
 385     s = DO_UPCAST(PIIX4PMState, dev, dev);
 386     s->irq = sci_irq;
 387     acpi_pm1_cnt_init(&s->pm1_cnt, cmos_s3);
 388     s->smi_irq = smi_irq;
 389     s->kvm_enabled = kvm_enabled;
 390
 391     qdev_init_nofail(&dev->qdev);
 392
 393     return s->smb.smbus;
 394 }
 395
 396 static PCIDeviceInfo piix4_pm_info = {
 397     .qdev.name          = "PIIX4_PM",
 398     .qdev.desc          = "PM",
 399     .qdev.size          = sizeof(PIIX4PMState),
 400     .qdev.vmsd          = &vmstate_acpi,
 401     .qdev.no_user       = 1,
 402     .no_hotplug         = 1,
 403     .init               = piix4_pm_initfn,
 404     .config_write       = pm_write_config,
 405     .vendor_id          = PCI_VENDOR_ID_INTEL,
 406     .device_id          = PCI_DEVICE_ID_INTEL_82371AB_3,
 407     .revision           = 0x03,
 408     .class_id           = PCI_CLASS_BRIDGE_OTHER,
 409     .qdev.props         = (Property[]) {
 410         DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 411         DEFINE_PROP_END_OF_LIST(),
 412     }
 413 };
 414
 415 static void piix4_pm_register(void)
 416 {
 417     pci_qdev_register(&piix4_pm_info);
 418 }
 419
 420 device_init(piix4_pm_register);
 421
 422 static uint32_t gpe_readb(void *opaque, uint32_t addr)
 423 {
 424     PIIX4PMState *s = opaque;
 425     uint32_t val = acpi_gpe_ioport_readb(&s->gpe, addr);
 426
 427     PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
 428     return val;
 429 }
 430
 431 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
 432 {
 433     PIIX4PMState *s = opaque;
 434
 435     acpi_gpe_ioport_writeb(&s->gpe, addr, val);
 436     pm_update_sci(s);
 437
 438     PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
 439 }
 440
 441 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
 442 {
 443     uint32_t val = 0;
 444     struct pci_status *g = opaque;
 445     switch (addr) {
 446         case PCI_BASE:
 447             val = g->up;
 448             break;
 449         case PCI_BASE + 4:
 450             val = g->down;
 451             break;
 452         default:
 453             break;
 454     }
 455
 456     PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
 457     return val;
 458 }
 459
 460 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
 461 {
 462     struct pci_status *g = opaque;
 463     switch (addr) {
 464         case PCI_BASE:
 465             g->up = val;
 466             break;
 467         case PCI_BASE + 4:
 468             g->down = val;
 469             break;
 470    }
 471
 472     PIIX4_DPRINTF("pcihotplug write %x <== %d\n", addr, val);
 473 }
 474
 475 static uint32_t pciej_read(void *opaque, uint32_t addr)
 476 {
 477     PIIX4_DPRINTF("pciej read %x\n", addr);
 478     return 0;
 479 }
 480
 481 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
 482 {
 483     BusState *bus = opaque;
 484     DeviceState *qdev, *next;
 485     PCIDevice *dev;
 486     PCIDeviceInfo *info;
 487     int slot = ffs(val) - 1;
 488
 489     QTAILQ_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
 490         dev = DO_UPCAST(PCIDevice, qdev, qdev);
 491         info = container_of(qdev->info, PCIDeviceInfo, qdev);
 492         if (PCI_SLOT(dev->devfn) == slot && !info->no_hotplug) {
 493             qdev_free(qdev);
 494         }
 495     }
 496
 497
 498     PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
 499 }
 500
 501 static uint32_t pcirmv_read(void *opaque, uint32_t addr)
 502 {
 503     PIIX4PMState *s = opaque;
 504
 505     return s->pci0_hotplug_enable;
 506 }
 507
 508 static void pcirmv_write(void *opaque, uint32_t addr, uint32_t val)
 509 {
 510     return;
 511 }
 512
 513 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
 514                                 PCIHotplugState state);
 515
 516 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
 517 {
 518     struct pci_status *pci0_status = &s->pci0_status;
 519
 520     register_ioport_write(GPE_BASE, GPE_LEN, 1, gpe_writeb, s);
 521     register_ioport_read(GPE_BASE, GPE_LEN, 1,  gpe_readb, s);
 522     acpi_gpe_blk(&s->gpe, GPE_BASE);
 523
 524     register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, pci0_status);
 525     register_ioport_read(PCI_BASE, 8, 4,  pcihotplug_read, pci0_status);
 526
 527     register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
 528     register_ioport_read(PCI_EJ_BASE, 4, 4,  pciej_read, bus);
 529
 530     register_ioport_write(PCI_RMV_BASE, 4, 4, pcirmv_write, s);
 531     register_ioport_read(PCI_RMV_BASE, 4, 4,  pcirmv_read, s);
 532
 533     pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
 534 }
 535
 536 static void enable_device(PIIX4PMState *s, int slot)
 537 {
 538     s->gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
 539     s->pci0_status.up |= (1 << slot);
 540 }
 541
 542 static void disable_device(PIIX4PMState *s, int slot)
 543 {
 544     s->gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
 545     s->pci0_status.down |= (1 << slot);
 546 }
 547
 548 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
 549                                 PCIHotplugState state)
 550 {
 551     int slot = PCI_SLOT(dev->devfn);
 552     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
 553                                 DO_UPCAST(PCIDevice, qdev, qdev));
 554
 555     /* Don't send event when device is enabled during qemu machine creation:
 556      * it is present on boot, no hotplug event is necessary. We do send an
 557      * event when the device is disabled later. */
 558     if (state == PCI_COLDPLUG_ENABLED) {
 559         return 0;
 560     }
 561
 562     s->pci0_status.up = 0;
 563     s->pci0_status.down = 0;
 564     if (state == PCI_HOTPLUG_ENABLED) {
 565         enable_device(s, slot);
 566     } else {
 567         disable_device(s, slot);
 568     }
 569
 570     pm_update_sci(s);
 571
 572     return 0;
 573 }