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
  27 //#define DEBUG
  28
  29 #ifdef DEBUG
  30 # define PIIX4_DPRINTF(format, ...)     printf(format, ## __VA_ARGS__)
  31 #else
  32 # define PIIX4_DPRINTF(format, ...)     do { } while (0)
  33 #endif
  34
  35 #define ACPI_DBG_IO_ADDR  0xb044
  36
  37 #define GPE_BASE 0xafe0
  38 #define PCI_BASE 0xae00
  39 #define PCI_EJ_BASE 0xae08
  40
  41 #define PIIX4_PCI_HOTPLUG_STATUS 2
  42
  43 struct gpe_regs {
  44     uint16_t sts; /* status */
  45     uint16_t en;  /* enabled */
  46 };
  47
  48 struct pci_status {
  49     uint32_t up;
  50     uint32_t down;
  51 };
  52
  53 typedef struct PIIX4PMState {
  54     PCIDevice dev;
  55     uint16_t pmsts;
  56     uint16_t pmen;
  57     uint16_t pmcntrl;
  58
  59     APMState apm;
  60
  61     QEMUTimer *tmr_timer;
  62     int64_t tmr_overflow_time;
  63
  64     PMSMBus smb;
  65     uint32_t smb_io_base;
  66
  67     qemu_irq irq;
  68     qemu_irq cmos_s3;
  69     qemu_irq smi_irq;
  70     int kvm_enabled;
  71
  72     /* for pci hotplug */
  73     struct gpe_regs gpe;
  74     struct pci_status pci0_status;
  75 } PIIX4PMState;
  76
  77 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
  78
  79 #define ACPI_ENABLE 0xf1
  80 #define ACPI_DISABLE 0xf0
  81
  82 static uint32_t get_pmtmr(PIIX4PMState *s)
  83 {
  84     uint32_t d;
  85     d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY, get_ticks_per_sec());
  86     return d & 0xffffff;
  87 }
  88
  89 static int get_pmsts(PIIX4PMState *s)
  90 {
  91     int64_t d;
  92
  93     d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
  94                  get_ticks_per_sec());
  95     if (d >= s->tmr_overflow_time)
  96         s->pmsts |= ACPI_BITMASK_TIMER_STATUS;
  97     return s->pmsts;
  98 }
  99
 100 static void pm_update_sci(PIIX4PMState *s)
 101 {
 102     int sci_level, pmsts;
 103     int64_t expire_time;
 104
 105     pmsts = get_pmsts(s);
 106     sci_level = (((pmsts & s->pmen) &
 107                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
 108                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
 109                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
 110                    ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
 111         (((s->gpe.sts & s->gpe.en) & PIIX4_PCI_HOTPLUG_STATUS) != 0);
 112
 113     qemu_set_irq(s->irq, sci_level);
 114     /* schedule a timer interruption if needed */
 115     if ((s->pmen & ACPI_BITMASK_TIMER_ENABLE) &&
 116         !(pmsts & ACPI_BITMASK_TIMER_STATUS)) {
 117         expire_time = muldiv64(s->tmr_overflow_time, get_ticks_per_sec(),
 118                                PM_TIMER_FREQUENCY);
 119         qemu_mod_timer(s->tmr_timer, expire_time);
 120     } else {
 121         qemu_del_timer(s->tmr_timer);
 122     }
 123 }
 124
 125 static void pm_tmr_timer(void *opaque)
 126 {
 127     PIIX4PMState *s = opaque;
 128     pm_update_sci(s);
 129 }
 130
 131 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
 132 {
 133     PIIX4PMState *s = opaque;
 134     addr &= 0x3f;
 135     switch(addr) {
 136     case 0x00:
 137         {
 138             int64_t d;
 139             int pmsts;
 140             pmsts = get_pmsts(s);
 141             if (pmsts & val & ACPI_BITMASK_TIMER_STATUS) {
 142                 /* if TMRSTS is reset, then compute the new overflow time */
 143                 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
 144                              get_ticks_per_sec());
 145                 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
 146             }
 147             s->pmsts &= ~val;
 148             pm_update_sci(s);
 149         }
 150         break;
 151     case 0x02:
 152         s->pmen = val;
 153         pm_update_sci(s);
 154         break;
 155     case 0x04:
 156         {
 157             int sus_typ;
 158             s->pmcntrl = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
 159             if (val & ACPI_BITMASK_SLEEP_ENABLE) {
 160                 /* change suspend type */
 161                 sus_typ = (val >> 10) & 7;
 162                 switch(sus_typ) {
 163                 case 0: /* soft power off */
 164                     qemu_system_shutdown_request();
 165                     break;
 166                 case 1:
 167                     /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
 168                        Pretend that resume was caused by power button */
 169                     s->pmsts |= (ACPI_BITMASK_WAKE_STATUS |
 170                                  ACPI_BITMASK_POWER_BUTTON_STATUS);
 171                     qemu_system_reset_request();
 172                     if (s->cmos_s3) {
 173                         qemu_irq_raise(s->cmos_s3);
 174                     }
 175                 default:
 176                     break;
 177                 }
 178             }
 179         }
 180         break;
 181     default:
 182         break;
 183     }
 184     PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", addr, val);
 185 }
 186
 187 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
 188 {
 189     PIIX4PMState *s = opaque;
 190     uint32_t val;
 191
 192     addr &= 0x3f;
 193     switch(addr) {
 194     case 0x00:
 195         val = get_pmsts(s);
 196         break;
 197     case 0x02:
 198         val = s->pmen;
 199         break;
 200     case 0x04:
 201         val = s->pmcntrl;
 202         break;
 203     default:
 204         val = 0;
 205         break;
 206     }
 207     PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", addr, val);
 208     return val;
 209 }
 210
 211 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 212 {
 213     //    PIIX4PMState *s = opaque;
 214     PIIX4_DPRINTF("PM writel port=0x%04x val=0x%08x\n", addr & 0x3f, val);
 215 }
 216
 217 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
 218 {
 219     PIIX4PMState *s = opaque;
 220     uint32_t val;
 221
 222     addr &= 0x3f;
 223     switch(addr) {
 224     case 0x08:
 225         val = get_pmtmr(s);
 226         break;
 227     default:
 228         val = 0;
 229         break;
 230     }
 231     PIIX4_DPRINTF("PM readl port=0x%04x val=0x%08x\n", addr, val);
 232     return val;
 233 }
 234
 235 static void apm_ctrl_changed(uint32_t val, void *arg)
 236 {
 237     PIIX4PMState *s = arg;
 238
 239     /* ACPI specs 3.0, 4.7.2.5 */
 240     if (val == ACPI_ENABLE) {
 241         s->pmcntrl |= ACPI_BITMASK_SCI_ENABLE;
 242     } else if (val == ACPI_DISABLE) {
 243         s->pmcntrl &= ~ACPI_BITMASK_SCI_ENABLE;
 244     }
 245
 246     if (s->dev.config[0x5b] & (1 << 1)) {
 247         if (s->smi_irq) {
 248             qemu_irq_raise(s->smi_irq);
 249         }
 250     }
 251 }
 252
 253 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
 254 {
 255     PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
 256 }
 257
 258 static void pm_io_space_update(PIIX4PMState *s)
 259 {
 260     uint32_t pm_io_base;
 261
 262     if (s->dev.config[0x80] & 1) {
 263         pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
 264         pm_io_base &= 0xffc0;
 265
 266         /* XXX: need to improve memory and ioport allocation */
 267         PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
 268         register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
 269         register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
 270         register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
 271         register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
 272     }
 273 }
 274
 275 static void pm_write_config(PCIDevice *d,
 276                             uint32_t address, uint32_t val, int len)
 277 {
 278     pci_default_write_config(d, address, val, len);
 279     if (range_covers_byte(address, len, 0x80))
 280         pm_io_space_update((PIIX4PMState *)d);
 281 }
 282
 283 static int vmstate_acpi_post_load(void *opaque, int version_id)
 284 {
 285     PIIX4PMState *s = opaque;
 286
 287     pm_io_space_update(s);
 288     return 0;
 289 }
 290
 291 static const VMStateDescription vmstate_gpe = {
 292     .name = "gpe",
 293     .version_id = 1,
 294     .minimum_version_id = 1,
 295     .minimum_version_id_old = 1,
 296     .fields      = (VMStateField []) {
 297         VMSTATE_UINT16(sts, struct gpe_regs),
 298         VMSTATE_UINT16(en, struct gpe_regs),
 299         VMSTATE_END_OF_LIST()
 300     }
 301 };
 302
 303 static const VMStateDescription vmstate_pci_status = {
 304     .name = "pci_status",
 305     .version_id = 1,
 306     .minimum_version_id = 1,
 307     .minimum_version_id_old = 1,
 308     .fields      = (VMStateField []) {
 309         VMSTATE_UINT32(up, struct pci_status),
 310         VMSTATE_UINT32(down, struct pci_status),
 311         VMSTATE_END_OF_LIST()
 312     }
 313 };
 314
 315 static const VMStateDescription vmstate_acpi = {
 316     .name = "piix4_pm",
 317     .version_id = 2,
 318     .minimum_version_id = 1,
 319     .minimum_version_id_old = 1,
 320     .post_load = vmstate_acpi_post_load,
 321     .fields      = (VMStateField []) {
 322         VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
 323         VMSTATE_UINT16(pmsts, PIIX4PMState),
 324         VMSTATE_UINT16(pmen, PIIX4PMState),
 325         VMSTATE_UINT16(pmcntrl, PIIX4PMState),
 326         VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
 327         VMSTATE_TIMER(tmr_timer, PIIX4PMState),
 328         VMSTATE_INT64(tmr_overflow_time, PIIX4PMState),
 329         VMSTATE_STRUCT(gpe, PIIX4PMState, 2, vmstate_gpe, struct gpe_regs),
 330         VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
 331                        struct pci_status),
 332         VMSTATE_END_OF_LIST()
 333     }
 334 };
 335
 336 static void piix4_reset(void *opaque)
 337 {
 338     PIIX4PMState *s = opaque;
 339     uint8_t *pci_conf = s->dev.config;
 340
 341     pci_conf[0x58] = 0;
 342     pci_conf[0x59] = 0;
 343     pci_conf[0x5a] = 0;
 344     pci_conf[0x5b] = 0;
 345
 346     if (s->kvm_enabled) {
 347         /* Mark SMM as already inited (until KVM supports SMM). */
 348         pci_conf[0x5B] = 0x02;
 349     }
 350 }
 351
 352 static void piix4_powerdown(void *opaque, int irq, int power_failing)
 353 {
 354     PIIX4PMState *s = opaque;
 355
 356     if (!s) {
 357         qemu_system_shutdown_request();
 358     } else if (s->pmen & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
 359         s->pmsts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
 360         pm_update_sci(s);
 361     }
 362 }
 363
 364 static int piix4_pm_initfn(PCIDevice *dev)
 365 {
 366     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
 367     uint8_t *pci_conf;
 368
 369     pci_conf = s->dev.config;
 370     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
 371     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_3);
 372     pci_conf[0x06] = 0x80;
 373     pci_conf[0x07] = 0x02;
 374     pci_conf[0x08] = 0x03; // revision number
 375     pci_conf[0x09] = 0x00;
 376     pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
 377     pci_conf[0x3d] = 0x01; // interrupt pin 1
 378
 379     pci_conf[0x40] = 0x01; /* PM io base read only bit */
 380
 381     /* APM */
 382     apm_init(&s->apm, apm_ctrl_changed, s);
 383
 384     register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
 385
 386     if (s->kvm_enabled) {
 387         /* Mark SMM as already inited to prevent SMM from running.  KVM does not
 388          * support SMM mode. */
 389         pci_conf[0x5B] = 0x02;
 390     }
 391
 392     /* XXX: which specification is used ? The i82731AB has different
 393        mappings */
 394     pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
 395     pci_conf[0x63] = 0x60;
 396     pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
 397         (serial_hds[1] != NULL ? 0x90 : 0);
 398
 399     pci_conf[0x90] = s->smb_io_base | 1;
 400     pci_conf[0x91] = s->smb_io_base >> 8;
 401     pci_conf[0xd2] = 0x09;
 402     register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
 403     register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
 404
 405     s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
 406
 407     qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
 408
 409     pm_smbus_init(&s->dev.qdev, &s->smb);
 410     qemu_register_reset(piix4_reset, s);
 411     piix4_acpi_system_hot_add_init(dev->bus, s);
 412
 413     return 0;
 414 }
 415
 416 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 417                        qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
 418                        int kvm_enabled)
 419 {
 420     PCIDevice *dev;
 421     PIIX4PMState *s;
 422
 423     dev = pci_create(bus, devfn, "PIIX4_PM");
 424     qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
 425
 426     s = DO_UPCAST(PIIX4PMState, dev, dev);
 427     s->irq = sci_irq;
 428     s->cmos_s3 = cmos_s3;
 429     s->smi_irq = smi_irq;
 430     s->kvm_enabled = kvm_enabled;
 431
 432     qdev_init_nofail(&dev->qdev);
 433
 434     return s->smb.smbus;
 435 }
 436
 437 static PCIDeviceInfo piix4_pm_info = {
 438     .qdev.name          = "PIIX4_PM",
 439     .qdev.desc          = "PM",
 440     .qdev.size          = sizeof(PIIX4PMState),
 441     .qdev.vmsd          = &vmstate_acpi,
 442     .init               = piix4_pm_initfn,
 443     .config_write       = pm_write_config,
 444     .qdev.props         = (Property[]) {
 445         DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
 446         DEFINE_PROP_END_OF_LIST(),
 447     }
 448 };
 449
 450 static void piix4_pm_register(void)
 451 {
 452     pci_qdev_register(&piix4_pm_info);
 453 }
 454
 455 device_init(piix4_pm_register);
 456
 457 static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
 458 {
 459     if (addr & 1)
 460         return (val >> 8) & 0xff;
 461     return val & 0xff;
 462 }
 463
 464 static uint32_t gpe_readb(void *opaque, uint32_t addr)
 465 {
 466     uint32_t val = 0;
 467     PIIX4PMState *s = opaque;
 468     struct gpe_regs *g = &s->gpe;
 469
 470     switch (addr) {
 471         case GPE_BASE:
 472         case GPE_BASE + 1:
 473             val = gpe_read_val(g->sts, addr);
 474             break;
 475         case GPE_BASE + 2:
 476         case GPE_BASE + 3:
 477             val = gpe_read_val(g->en, addr);
 478             break;
 479         default:
 480             break;
 481     }
 482
 483     PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
 484     return val;
 485 }
 486
 487 static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
 488 {
 489     if (addr & 1)
 490         *cur = (*cur & 0xff) | (val << 8);
 491     else
 492         *cur = (*cur & 0xff00) | (val & 0xff);
 493 }
 494
 495 static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
 496 {
 497     uint16_t x1, x0 = val & 0xff;
 498     int shift = (addr & 1) ? 8 : 0;
 499
 500     x1 = (*cur >> shift) & 0xff;
 501
 502     x1 = x1 & ~x0;
 503
 504     *cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
 505 }
 506
 507 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
 508 {
 509     PIIX4PMState *s = opaque;
 510     struct gpe_regs *g = &s->gpe;
 511
 512     switch (addr) {
 513         case GPE_BASE:
 514         case GPE_BASE + 1:
 515             gpe_reset_val(&g->sts, addr, val);
 516             break;
 517         case GPE_BASE + 2:
 518         case GPE_BASE + 3:
 519             gpe_write_val(&g->en, addr, val);
 520             break;
 521         default:
 522             break;
 523     }
 524
 525     pm_update_sci(s);
 526
 527     PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
 528 }
 529
 530 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
 531 {
 532     uint32_t val = 0;
 533     struct pci_status *g = opaque;
 534     switch (addr) {
 535         case PCI_BASE:
 536             val = g->up;
 537             break;
 538         case PCI_BASE + 4:
 539             val = g->down;
 540             break;
 541         default:
 542             break;
 543     }
 544
 545     PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
 546     return val;
 547 }
 548
 549 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
 550 {
 551     struct pci_status *g = opaque;
 552     switch (addr) {
 553         case PCI_BASE:
 554             g->up = val;
 555             break;
 556         case PCI_BASE + 4:
 557             g->down = val;
 558             break;
 559    }
 560
 561     PIIX4_DPRINTF("pcihotplug write %x <== %d\n", addr, val);
 562 }
 563
 564 static uint32_t pciej_read(void *opaque, uint32_t addr)
 565 {
 566     PIIX4_DPRINTF("pciej read %x\n", addr);
 567     return 0;
 568 }
 569
 570 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
 571 {
 572     BusState *bus = opaque;
 573     DeviceState *qdev, *next;
 574     PCIDevice *dev;
 575     int slot = ffs(val) - 1;
 576
 577     QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
 578         dev = DO_UPCAST(PCIDevice, qdev, qdev);
 579         if (PCI_SLOT(dev->devfn) == slot) {
 580             qdev_free(qdev);
 581         }
 582     }
 583
 584
 585     PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
 586 }
 587
 588 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state);
 589
 590 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
 591 {
 592     struct pci_status *pci0_status = &s->pci0_status;
 593
 594     register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, s);
 595     register_ioport_read(GPE_BASE, 4, 1,  gpe_readb, s);
 596
 597     register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, pci0_status);
 598     register_ioport_read(PCI_BASE, 8, 4,  pcihotplug_read, pci0_status);
 599
 600     register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
 601     register_ioport_read(PCI_EJ_BASE, 4, 4,  pciej_read, bus);
 602
 603     pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
 604 }
 605
 606 static void enable_device(PIIX4PMState *s, int slot)
 607 {
 608     s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
 609     s->pci0_status.up |= (1 << slot);
 610 }
 611
 612 static void disable_device(PIIX4PMState *s, int slot)
 613 {
 614     s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
 615     s->pci0_status.down |= (1 << slot);
 616 }
 617
 618 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state)
 619 {
 620     int slot = PCI_SLOT(dev->devfn);
 621     PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
 622                                 DO_UPCAST(PCIDevice, qdev, qdev));
 623
 624     s->pci0_status.up = 0;
 625     s->pci0_status.down = 0;
 626     if (state) {
 627         enable_device(s, slot);
 628     } else {
 629         disable_device(s, slot);
 630     }
 631
 632     pm_update_sci(s);
 633
 634     return 0;
 635 }