hw/acpi/ich9.c

   1 /*
   2  * ACPI implementation
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
   6  *                    VA Linux Systems Japan K.K.
   7  * Copyright (C) 2012 Jason Baron <[email protected]>
   8  *
   9  * This is based on acpi.c.
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License version 2 as published by the Free Software Foundation.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  22  *
  23  * Contributions after 2012-01-13 are licensed under the terms of the
  24  * GNU GPL, version 2 or (at your option) any later version.
  25  */
  26 #include "qemu/osdep.h"
  27 #include "hw/hw.h"
  28 #include "qapi/visitor.h"
  29 #include "hw/i386/pc.h"
  30 #include "hw/pci/pci.h"
  31 #include "qemu/timer.h"
  32 #include "sysemu/sysemu.h"
  33 #include "hw/acpi/acpi.h"
  34 #include "hw/acpi/tco.h"
  35 #include "sysemu/kvm.h"
  36 #include "exec/address-spaces.h"
  37
  38 #include "hw/i386/ich9.h"
  39 #include "hw/mem/pc-dimm.h"
  40
  41 //#define DEBUG
  42
  43 #ifdef DEBUG
  44 #define ICH9_DEBUG(fmt, ...) \
  45 do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
  46 #else
  47 #define ICH9_DEBUG(fmt, ...)    do { } while (0)
  48 #endif
  49
  50 static void ich9_pm_update_sci_fn(ACPIREGS *regs)
  51 {
  52     ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
  53     acpi_update_sci(&pm->acpi_regs, pm->irq);
  54 }
  55
  56 static uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width)
  57 {
  58     ICH9LPCPMRegs *pm = opaque;
  59     return acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
  60 }
  61
  62 static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
  63                             unsigned width)
  64 {
  65     ICH9LPCPMRegs *pm = opaque;
  66     acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
  67     acpi_update_sci(&pm->acpi_regs, pm->irq);
  68 }
  69
  70 static const MemoryRegionOps ich9_gpe_ops = {
  71     .read = ich9_gpe_readb,
  72     .write = ich9_gpe_writeb,
  73     .valid.min_access_size = 1,
  74     .valid.max_access_size = 4,
  75     .impl.min_access_size = 1,
  76     .impl.max_access_size = 1,
  77     .endianness = DEVICE_LITTLE_ENDIAN,
  78 };
  79
  80 static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width)
  81 {
  82     ICH9LPCPMRegs *pm = opaque;
  83     switch (addr) {
  84     case 0:
  85         return pm->smi_en;
  86     case 4:
  87         return pm->smi_sts;
  88     default:
  89         return 0;
  90     }
  91 }
  92
  93 static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val,
  94                             unsigned width)
  95 {
  96     ICH9LPCPMRegs *pm = opaque;
  97     TCOIORegs *tr = &pm->tco_regs;
  98     uint64_t tco_en;
  99
 100     switch (addr) {
 101     case 0:
 102         tco_en = pm->smi_en & ICH9_PMIO_SMI_EN_TCO_EN;
 103         /* once TCO_LOCK bit is set, TCO_EN bit cannot be overwritten */
 104         if (tr->tco.cnt1 & TCO_LOCK) {
 105             val = (val & ~ICH9_PMIO_SMI_EN_TCO_EN) | tco_en;
 106         }
 107         pm->smi_en &= ~pm->smi_en_wmask;
 108         pm->smi_en |= (val & pm->smi_en_wmask);
 109         break;
 110     }
 111 }
 112
 113 static const MemoryRegionOps ich9_smi_ops = {
 114     .read = ich9_smi_readl,
 115     .write = ich9_smi_writel,
 116     .valid.min_access_size = 4,
 117     .valid.max_access_size = 4,
 118     .endianness = DEVICE_LITTLE_ENDIAN,
 119 };
 120
 121 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
 122 {
 123     ICH9_DEBUG("to 0x%x\n", pm_io_base);
 124
 125     assert((pm_io_base & ICH9_PMIO_MASK) == 0);
 126
 127     pm->pm_io_base = pm_io_base;
 128     memory_region_transaction_begin();
 129     memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
 130     memory_region_set_address(&pm->io, pm->pm_io_base);
 131     memory_region_transaction_commit();
 132 }
 133
 134 static int ich9_pm_post_load(void *opaque, int version_id)
 135 {
 136     ICH9LPCPMRegs *pm = opaque;
 137     uint32_t pm_io_base = pm->pm_io_base;
 138     pm->pm_io_base = 0;
 139     ich9_pm_iospace_update(pm, pm_io_base);
 140     return 0;
 141 }
 142
 143 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
 144  {                                                                   \
 145      .name       = (stringify(_field)),                              \
 146      .version_id = 0,                                                \
 147      .num        = ICH9_PMIO_GPE0_LEN,                               \
 148      .info       = &vmstate_info_uint8,                              \
 149      .size       = sizeof(uint8_t),                                  \
 150      .flags      = VMS_ARRAY | VMS_POINTER,                          \
 151      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
 152  }
 153
 154 static bool vmstate_test_use_memhp(void *opaque)
 155 {
 156     ICH9LPCPMRegs *s = opaque;
 157     return s->acpi_memory_hotplug.is_enabled;
 158 }
 159
 160 static const VMStateDescription vmstate_memhp_state = {
 161     .name = "ich9_pm/memhp",
 162     .version_id = 1,
 163     .minimum_version_id = 1,
 164     .minimum_version_id_old = 1,
 165     .needed = vmstate_test_use_memhp,
 166     .fields      = (VMStateField[]) {
 167         VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, ICH9LPCPMRegs),
 168         VMSTATE_END_OF_LIST()
 169     }
 170 };
 171
 172 static bool vmstate_test_use_tco(void *opaque)
 173 {
 174     ICH9LPCPMRegs *s = opaque;
 175     return s->enable_tco;
 176 }
 177
 178 static const VMStateDescription vmstate_tco_io_state = {
 179     .name = "ich9_pm/tco",
 180     .version_id = 1,
 181     .minimum_version_id = 1,
 182     .minimum_version_id_old = 1,
 183     .needed = vmstate_test_use_tco,
 184     .fields      = (VMStateField[]) {
 185         VMSTATE_STRUCT(tco_regs, ICH9LPCPMRegs, 1, vmstate_tco_io_sts,
 186                        TCOIORegs),
 187         VMSTATE_END_OF_LIST()
 188     }
 189 };
 190
 191 const VMStateDescription vmstate_ich9_pm = {
 192     .name = "ich9_pm",
 193     .version_id = 1,
 194     .minimum_version_id = 1,
 195     .post_load = ich9_pm_post_load,
 196     .fields = (VMStateField[]) {
 197         VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
 198         VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
 199         VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
 200         VMSTATE_TIMER_PTR(acpi_regs.tmr.timer, ICH9LPCPMRegs),
 201         VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
 202         VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
 203         VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
 204         VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
 205         VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
 206         VMSTATE_END_OF_LIST()
 207     },
 208     .subsections = (const VMStateDescription*[]) {
 209         &vmstate_memhp_state,
 210         &vmstate_tco_io_state,
 211         NULL
 212     }
 213 };
 214
 215 static void pm_reset(void *opaque)
 216 {
 217     ICH9LPCPMRegs *pm = opaque;
 218     ich9_pm_iospace_update(pm, 0);
 219
 220     acpi_pm1_evt_reset(&pm->acpi_regs);
 221     acpi_pm1_cnt_reset(&pm->acpi_regs);
 222     acpi_pm_tmr_reset(&pm->acpi_regs);
 223     acpi_gpe_reset(&pm->acpi_regs);
 224
 225     pm->smi_en = 0;
 226     if (!pm->smm_enabled) {
 227         /* Mark SMM as already inited to prevent SMM from running. */
 228         pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN;
 229     }
 230     pm->smi_en_wmask = ~0;
 231
 232     acpi_update_sci(&pm->acpi_regs, pm->irq);
 233 }
 234
 235 static void pm_powerdown_req(Notifier *n, void *opaque)
 236 {
 237     ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);
 238
 239     acpi_pm1_evt_power_down(&pm->acpi_regs);
 240 }
 241
 242 void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
 243                   bool smm_enabled, bool enable_tco,
 244                   qemu_irq sci_irq)
 245 {
 246     memory_region_init(&pm->io, OBJECT(lpc_pci), "ich9-pm", ICH9_PMIO_SIZE);
 247     memory_region_set_enabled(&pm->io, false);
 248     memory_region_add_subregion(pci_address_space_io(lpc_pci),
 249                                 0, &pm->io);
 250
 251     acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
 252     acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
 253     acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io, pm->disable_s3, pm->disable_s4,
 254                       pm->s4_val);
 255
 256     acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
 257     memory_region_init_io(&pm->io_gpe, OBJECT(lpc_pci), &ich9_gpe_ops, pm,
 258                           "acpi-gpe0", ICH9_PMIO_GPE0_LEN);
 259     memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe);
 260
 261     memory_region_init_io(&pm->io_smi, OBJECT(lpc_pci), &ich9_smi_ops, pm,
 262                           "acpi-smi", 8);
 263     memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi);
 264
 265     pm->smm_enabled = smm_enabled;
 266
 267     pm->enable_tco = enable_tco;
 268     if (pm->enable_tco) {
 269         acpi_pm_tco_init(&pm->tco_regs, &pm->io);
 270     }
 271
 272     pm->irq = sci_irq;
 273     qemu_register_reset(pm_reset, pm);
 274     pm->powerdown_notifier.notify = pm_powerdown_req;
 275     qemu_register_powerdown_notifier(&pm->powerdown_notifier);
 276
 277     acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
 278                           &pm->gpe_cpu, ICH9_CPU_HOTPLUG_IO_BASE);
 279
 280     if (pm->acpi_memory_hotplug.is_enabled) {
 281         acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
 282                                  &pm->acpi_memory_hotplug);
 283     }
 284 }
 285
 286 static void ich9_pm_get_gpe0_blk(Object *obj, Visitor *v, const char *name,
 287                                  void *opaque, Error **errp)
 288 {
 289     ICH9LPCPMRegs *pm = opaque;
 290     uint32_t value = pm->pm_io_base + ICH9_PMIO_GPE0_STS;
 291
 292     visit_type_uint32(v, name, &value, errp);
 293 }
 294
 295 static bool ich9_pm_get_memory_hotplug_support(Object *obj, Error **errp)
 296 {
 297     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
 298
 299     return s->pm.acpi_memory_hotplug.is_enabled;
 300 }
 301
 302 static void ich9_pm_set_memory_hotplug_support(Object *obj, bool value,
 303                                                Error **errp)
 304 {
 305     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
 306
 307     s->pm.acpi_memory_hotplug.is_enabled = value;
 308 }
 309
 310 static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
 311                                    void *opaque, Error **errp)
 312 {
 313     ICH9LPCPMRegs *pm = opaque;
 314     uint8_t value = pm->disable_s3;
 315
 316     visit_type_uint8(v, name, &value, errp);
 317 }
 318
 319 static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
 320                                    void *opaque, Error **errp)
 321 {
 322     ICH9LPCPMRegs *pm = opaque;
 323     Error *local_err = NULL;
 324     uint8_t value;
 325
 326     visit_type_uint8(v, name, &value, &local_err);
 327     if (local_err) {
 328         goto out;
 329     }
 330     pm->disable_s3 = value;
 331 out:
 332     error_propagate(errp, local_err);
 333 }
 334
 335 static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
 336                                    void *opaque, Error **errp)
 337 {
 338     ICH9LPCPMRegs *pm = opaque;
 339     uint8_t value = pm->disable_s4;
 340
 341     visit_type_uint8(v, name, &value, errp);
 342 }
 343
 344 static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
 345                                    void *opaque, Error **errp)
 346 {
 347     ICH9LPCPMRegs *pm = opaque;
 348     Error *local_err = NULL;
 349     uint8_t value;
 350
 351     visit_type_uint8(v, name, &value, &local_err);
 352     if (local_err) {
 353         goto out;
 354     }
 355     pm->disable_s4 = value;
 356 out:
 357     error_propagate(errp, local_err);
 358 }
 359
 360 static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
 361                                void *opaque, Error **errp)
 362 {
 363     ICH9LPCPMRegs *pm = opaque;
 364     uint8_t value = pm->s4_val;
 365
 366     visit_type_uint8(v, name, &value, errp);
 367 }
 368
 369 static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
 370                                void *opaque, Error **errp)
 371 {
 372     ICH9LPCPMRegs *pm = opaque;
 373     Error *local_err = NULL;
 374     uint8_t value;
 375
 376     visit_type_uint8(v, name, &value, &local_err);
 377     if (local_err) {
 378         goto out;
 379     }
 380     pm->s4_val = value;
 381 out:
 382     error_propagate(errp, local_err);
 383 }
 384
 385 static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
 386 {
 387     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
 388     return s->pm.enable_tco;
 389 }
 390
 391 static void ich9_pm_set_enable_tco(Object *obj, bool value, Error **errp)
 392 {
 393     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
 394     s->pm.enable_tco = value;
 395 }
 396
 397 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
 398 {
 399     static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
 400     pm->acpi_memory_hotplug.is_enabled = true;
 401     pm->disable_s3 = 0;
 402     pm->disable_s4 = 0;
 403     pm->s4_val = 2;
 404
 405     object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE,
 406                                    &pm->pm_io_base, errp);
 407     object_property_add(obj, ACPI_PM_PROP_GPE0_BLK, "uint32",
 408                         ich9_pm_get_gpe0_blk,
 409                         NULL, NULL, pm, NULL);
 410     object_property_add_uint32_ptr(obj, ACPI_PM_PROP_GPE0_BLK_LEN,
 411                                    &gpe0_len, errp);
 412     object_property_add_bool(obj, "memory-hotplug-support",
 413                              ich9_pm_get_memory_hotplug_support,
 414                              ich9_pm_set_memory_hotplug_support,
 415                              NULL);
 416     object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
 417                         ich9_pm_get_disable_s3,
 418                         ich9_pm_set_disable_s3,
 419                         NULL, pm, NULL);
 420     object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
 421                         ich9_pm_get_disable_s4,
 422                         ich9_pm_set_disable_s4,
 423                         NULL, pm, NULL);
 424     object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
 425                         ich9_pm_get_s4_val,
 426                         ich9_pm_set_s4_val,
 427                         NULL, pm, NULL);
 428     object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
 429                              ich9_pm_get_enable_tco,
 430                              ich9_pm_set_enable_tco,
 431                              NULL);
 432 }
 433
 434 void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp)
 435 {
 436     if (pm->acpi_memory_hotplug.is_enabled &&
 437         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 438         acpi_memory_plug_cb(&pm->acpi_regs, pm->irq, &pm->acpi_memory_hotplug,
 439                             dev, errp);
 440     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
 441         acpi_cpu_plug_cb(&pm->acpi_regs, pm->irq, &pm->gpe_cpu, dev, errp);
 442     } else {
 443         error_setg(errp, "acpi: device plug request for not supported device"
 444                    " type: %s", object_get_typename(OBJECT(dev)));
 445     }
 446 }
 447
 448 void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
 449                                       Error **errp)
 450 {
 451     if (pm->acpi_memory_hotplug.is_enabled &&
 452         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 453         acpi_memory_unplug_request_cb(&pm->acpi_regs, pm->irq,
 454                                       &pm->acpi_memory_hotplug, dev, errp);
 455     } else {
 456         error_setg(errp, "acpi: device unplug request for not supported device"
 457                    " type: %s", object_get_typename(OBJECT(dev)));
 458     }
 459 }
 460
 461 void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
 462                               Error **errp)
 463 {
 464     if (pm->acpi_memory_hotplug.is_enabled &&
 465         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
 466         acpi_memory_unplug_cb(&pm->acpi_memory_hotplug, dev, errp);
 467     } else {
 468         error_setg(errp, "acpi: device unplug for not supported device"
 469                    " type: %s", object_get_typename(OBJECT(dev)));
 470     }
 471 }
 472
 473 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
 474 {
 475     ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
 476
 477     acpi_memory_ospm_status(&s->pm.acpi_memory_hotplug, list);
 478 }