hw/acpi/memory_hotplug.c

   1 #include "qemu/osdep.h"
   2 #include "hw/acpi/memory_hotplug.h"
   3 #include "hw/acpi/pc-hotplug.h"
   4 #include "hw/mem/pc-dimm.h"
   5 #include "hw/boards.h"
   6 #include "hw/qdev-core.h"
   7 #include "migration/vmstate.h"
   8 #include "trace.h"
   9 #include "qapi/error.h"
  10 #include "qapi/qapi-events-misc.h"
  11
  12 #define MEMORY_SLOTS_NUMBER          "MDNR"
  13 #define MEMORY_HOTPLUG_IO_REGION     "HPMR"
  14 #define MEMORY_SLOT_ADDR_LOW         "MRBL"
  15 #define MEMORY_SLOT_ADDR_HIGH        "MRBH"
  16 #define MEMORY_SLOT_SIZE_LOW         "MRLL"
  17 #define MEMORY_SLOT_SIZE_HIGH        "MRLH"
  18 #define MEMORY_SLOT_PROXIMITY        "MPX"
  19 #define MEMORY_SLOT_ENABLED          "MES"
  20 #define MEMORY_SLOT_INSERT_EVENT     "MINS"
  21 #define MEMORY_SLOT_REMOVE_EVENT     "MRMV"
  22 #define MEMORY_SLOT_EJECT            "MEJ"
  23 #define MEMORY_SLOT_SLECTOR          "MSEL"
  24 #define MEMORY_SLOT_OST_EVENT        "MOEV"
  25 #define MEMORY_SLOT_OST_STATUS       "MOSC"
  26 #define MEMORY_SLOT_LOCK             "MLCK"
  27 #define MEMORY_SLOT_STATUS_METHOD    "MRST"
  28 #define MEMORY_SLOT_CRS_METHOD       "MCRS"
  29 #define MEMORY_SLOT_OST_METHOD       "MOST"
  30 #define MEMORY_SLOT_PROXIMITY_METHOD "MPXM"
  31 #define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
  32 #define MEMORY_SLOT_NOTIFY_METHOD    "MTFY"
  33 #define MEMORY_SLOT_SCAN_METHOD      "MSCN"
  34 #define MEMORY_HOTPLUG_DEVICE        "MHPD"
  35 #define MEMORY_HOTPLUG_IO_LEN         24
  36 #define MEMORY_DEVICES_CONTAINER     "\\_SB.MHPC"
  37
  38 static uint16_t memhp_io_base;
  39
  40 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
  41 {
  42     ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
  43
  44     info->slot_type = ACPI_SLOT_TYPE_DIMM;
  45     info->slot = g_strdup_printf("%d", slot);
  46     info->source = mdev->ost_event;
  47     info->status = mdev->ost_status;
  48     if (mdev->dimm) {
  49         DeviceState *dev = DEVICE(mdev->dimm);
  50         if (dev->id) {
  51             info->device = g_strdup(dev->id);
  52             info->has_device = true;
  53         }
  54     }
  55     return info;
  56 }
  57
  58 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  59 {
  60     int i;
  61
  62     for (i = 0; i < mem_st->dev_count; i++) {
  63         ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
  64         elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
  65         elem->next = NULL;
  66         **list = elem;
  67         *list = &elem->next;
  68     }
  69 }
  70
  71 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  72                                          unsigned int size)
  73 {
  74     uint32_t val = 0;
  75     MemHotplugState *mem_st = opaque;
  76     MemStatus *mdev;
  77     Object *o;
  78
  79     if (mem_st->selector >= mem_st->dev_count) {
  80         trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  81         return 0;
  82     }
  83
  84     mdev = &mem_st->devs[mem_st->selector];
  85     o = OBJECT(mdev->dimm);
  86     switch (addr) {
  87     case 0x0: /* Lo part of phys address where DIMM is mapped */
  88         val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  89         trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  90         break;
  91     case 0x4: /* Hi part of phys address where DIMM is mapped */
  92         val =
  93             o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  94         trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  95         break;
  96     case 0x8: /* Lo part of DIMM size */
  97         val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  98         trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  99         break;
 100     case 0xc: /* Hi part of DIMM size */
 101         val =
 102             o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
 103         trace_mhp_acpi_read_size_hi(mem_st->selector, val);
 104         break;
 105     case 0x10: /* node proximity for _PXM method */
 106         val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
 107         trace_mhp_acpi_read_pxm(mem_st->selector, val);
 108         break;
 109     case 0x14: /* pack and return is_* fields */
 110         val |= mdev->is_enabled   ? 1 : 0;
 111         val |= mdev->is_inserting ? 2 : 0;
 112         val |= mdev->is_removing  ? 4 : 0;
 113         trace_mhp_acpi_read_flags(mem_st->selector, val);
 114         break;
 115     default:
 116         val = ~0;
 117         break;
 118     }
 119     return val;
 120 }
 121
 122 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 123                                       unsigned int size)
 124 {
 125     MemHotplugState *mem_st = opaque;
 126     MemStatus *mdev;
 127     ACPIOSTInfo *info;
 128     DeviceState *dev = NULL;
 129     HotplugHandler *hotplug_ctrl = NULL;
 130     Error *local_err = NULL;
 131
 132     if (!mem_st->dev_count) {
 133         return;
 134     }
 135
 136     if (addr) {
 137         if (mem_st->selector >= mem_st->dev_count) {
 138             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 139             return;
 140         }
 141     }
 142
 143     switch (addr) {
 144     case 0x0: /* DIMM slot selector */
 145         mem_st->selector = data;
 146         trace_mhp_acpi_write_slot(mem_st->selector);
 147         break;
 148     case 0x4: /* _OST event  */
 149         mdev = &mem_st->devs[mem_st->selector];
 150         if (data == 1) {
 151             /* TODO: handle device insert OST event */
 152         } else if (data == 3) {
 153             /* TODO: handle device remove OST event */
 154         }
 155         mdev->ost_event = data;
 156         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 157         break;
 158     case 0x8: /* _OST status */
 159         mdev = &mem_st->devs[mem_st->selector];
 160         mdev->ost_status = data;
 161         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 162         /* TODO: implement memory removal on guest signal */
 163
 164         info = acpi_memory_device_status(mem_st->selector, mdev);
 165         qapi_event_send_acpi_device_ost(info);
 166         qapi_free_ACPIOSTInfo(info);
 167         break;
 168     case 0x14: /* set is_* fields  */
 169         mdev = &mem_st->devs[mem_st->selector];
 170         if (data & 2) { /* clear insert event */
 171             mdev->is_inserting  = false;
 172             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 173         } else if (data & 4) {
 174             mdev->is_removing = false;
 175             trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 176         } else if (data & 8) {
 177             if (!mdev->is_enabled) {
 178                 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 179                 break;
 180             }
 181
 182             dev = DEVICE(mdev->dimm);
 183             hotplug_ctrl = qdev_get_hotplug_handler(dev);
 184             /* call pc-dimm unplug cb */
 185             hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 186             if (local_err) {
 187                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 188                 qapi_event_send_mem_unplug_error(dev->id,
 189                                                  error_get_pretty(local_err));
 190                 error_free(local_err);
 191                 break;
 192             }
 193             object_unparent(OBJECT(dev));
 194             trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 195         }
 196         break;
 197     default:
 198         break;
 199     }
 200
 201 }
 202 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 203     .read = acpi_memory_hotplug_read,
 204     .write = acpi_memory_hotplug_write,
 205     .endianness = DEVICE_LITTLE_ENDIAN,
 206     .valid = {
 207         .min_access_size = 1,
 208         .max_access_size = 4,
 209     },
 210 };
 211
 212 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 213                               MemHotplugState *state, uint16_t io_base)
 214 {
 215     MachineState *machine = MACHINE(qdev_get_machine());
 216
 217     state->dev_count = machine->ram_slots;
 218     if (!state->dev_count) {
 219         return;
 220     }
 221
 222     assert(!memhp_io_base);
 223     memhp_io_base = io_base;
 224     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 225     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 226                           "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 227     memory_region_add_subregion(as, memhp_io_base, &state->io);
 228 }
 229
 230 /**
 231  * acpi_memory_slot_status:
 232  * @mem_st: memory hotplug state
 233  * @dev: device
 234  * @errp: set in case of an error
 235  *
 236  * Obtain a single memory slot status.
 237  *
 238  * This function will be called by memory unplug request cb and unplug cb.
 239  */
 240 static MemStatus *
 241 acpi_memory_slot_status(MemHotplugState *mem_st,
 242                         DeviceState *dev, Error **errp)
 243 {
 244     Error *local_err = NULL;
 245     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 246                                        &local_err);
 247
 248     if (local_err) {
 249         error_propagate(errp, local_err);
 250         return NULL;
 251     }
 252
 253     if (slot >= mem_st->dev_count) {
 254         char *dev_path = object_get_canonical_path(OBJECT(dev));
 255         error_setg(errp, "acpi_memory_slot_status: "
 256                    "device [%s] returned invalid memory slot[%d]",
 257                     dev_path, slot);
 258         g_free(dev_path);
 259         return NULL;
 260     }
 261
 262     return &mem_st->devs[slot];
 263 }
 264
 265 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 266                          DeviceState *dev, Error **errp)
 267 {
 268     MemStatus *mdev;
 269     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 270
 271     if (!dc->hotpluggable) {
 272         return;
 273     }
 274
 275     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 276     if (!mdev) {
 277         return;
 278     }
 279
 280     mdev->dimm = dev;
 281     mdev->is_enabled = true;
 282     if (dev->hotplugged) {
 283         mdev->is_inserting = true;
 284         acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 285     }
 286 }
 287
 288 void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 289                                    MemHotplugState *mem_st,
 290                                    DeviceState *dev, Error **errp)
 291 {
 292     MemStatus *mdev;
 293
 294     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 295     if (!mdev) {
 296         return;
 297     }
 298
 299     mdev->is_removing = true;
 300     acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 301 }
 302
 303 void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 304                            DeviceState *dev, Error **errp)
 305 {
 306     MemStatus *mdev;
 307
 308     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 309     if (!mdev) {
 310         return;
 311     }
 312
 313     mdev->is_enabled = false;
 314     mdev->dimm = NULL;
 315 }
 316
 317 static const VMStateDescription vmstate_memhp_sts = {
 318     .name = "memory hotplug device state",
 319     .version_id = 1,
 320     .minimum_version_id = 1,
 321     .minimum_version_id_old = 1,
 322     .fields      = (VMStateField[]) {
 323         VMSTATE_BOOL(is_enabled, MemStatus),
 324         VMSTATE_BOOL(is_inserting, MemStatus),
 325         VMSTATE_UINT32(ost_event, MemStatus),
 326         VMSTATE_UINT32(ost_status, MemStatus),
 327         VMSTATE_END_OF_LIST()
 328     }
 329 };
 330
 331 const VMStateDescription vmstate_memory_hotplug = {
 332     .name = "memory hotplug state",
 333     .version_id = 1,
 334     .minimum_version_id = 1,
 335     .minimum_version_id_old = 1,
 336     .fields      = (VMStateField[]) {
 337         VMSTATE_UINT32(selector, MemHotplugState),
 338         VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 339                                              vmstate_memhp_sts, MemStatus),
 340         VMSTATE_END_OF_LIST()
 341     }
 342 };
 343
 344 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 345                               const char *res_root,
 346                               const char *event_handler_method)
 347 {
 348     int i;
 349     Aml *ifctx;
 350     Aml *method;
 351     Aml *dev_container;
 352     Aml *mem_ctrl_dev;
 353     char *mhp_res_path;
 354
 355     if (!memhp_io_base) {
 356         return;
 357     }
 358
 359     mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 360     mem_ctrl_dev = aml_device("%s", mhp_res_path);
 361     {
 362         Aml *crs;
 363
 364         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 365         aml_append(mem_ctrl_dev,
 366             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 367
 368         crs = aml_resource_template();
 369         aml_append(crs,
 370             aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 371                    MEMORY_HOTPLUG_IO_LEN)
 372         );
 373         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 374
 375         aml_append(mem_ctrl_dev, aml_operation_region(
 376             MEMORY_HOTPLUG_IO_REGION, AML_SYSTEM_IO,
 377             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 378         );
 379
 380     }
 381     aml_append(table, mem_ctrl_dev);
 382
 383     dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 384     {
 385         Aml *field;
 386         Aml *one = aml_int(1);
 387         Aml *zero = aml_int(0);
 388         Aml *ret_val = aml_local(0);
 389         Aml *slot_arg0 = aml_arg(0);
 390         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 391         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 392         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 393         char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 394                                           mhp_res_path);
 395
 396         aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 397         aml_append(dev_container,
 398             aml_name_decl("_UID", aml_string("DIMM devices")));
 399
 400         assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 401         aml_append(dev_container,
 402             aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 403         );
 404
 405         field = aml_field(mmio_path, AML_DWORD_ACC,
 406                           AML_NOLOCK, AML_PRESERVE);
 407         aml_append(field, /* read only */
 408             aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 409         aml_append(field, /* read only */
 410             aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 411         aml_append(field, /* read only */
 412             aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 413         aml_append(field, /* read only */
 414             aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 415         aml_append(field, /* read only */
 416             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 417         aml_append(dev_container, field);
 418
 419         field = aml_field(mmio_path, AML_BYTE_ACC,
 420                           AML_NOLOCK, AML_WRITE_AS_ZEROS);
 421         aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 422         aml_append(field, /* 1 if enabled, read only */
 423             aml_named_field(MEMORY_SLOT_ENABLED, 1));
 424         aml_append(field,
 425             /*(read) 1 if has a insert event. (write) 1 to clear event */
 426             aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 427         aml_append(field,
 428             /* (read) 1 if has a remove event. (write) 1 to clear event */
 429             aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 430         aml_append(field,
 431             /* initiates device eject, write only */
 432             aml_named_field(MEMORY_SLOT_EJECT, 1));
 433         aml_append(dev_container, field);
 434
 435         field = aml_field(mmio_path, AML_DWORD_ACC,
 436                           AML_NOLOCK, AML_PRESERVE);
 437         aml_append(field, /* DIMM selector, write only */
 438             aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 439         aml_append(field, /* _OST event code, write only */
 440             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 441         aml_append(field, /* _OST status code, write only */
 442             aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 443         aml_append(dev_container, field);
 444         g_free(mmio_path);
 445
 446         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 447         ifctx = aml_if(aml_equal(slots_nr, zero));
 448         {
 449             aml_append(ifctx, aml_return(zero));
 450         }
 451         aml_append(method, ifctx);
 452         /* present, functioning, decoding, not shown in UI */
 453         aml_append(method, aml_return(aml_int(0xB)));
 454         aml_append(dev_container, method);
 455
 456         aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 457
 458         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 459         {
 460             Aml *else_ctx;
 461             Aml *while_ctx;
 462             Aml *idx = aml_local(0);
 463             Aml *eject_req = aml_int(3);
 464             Aml *dev_chk = aml_int(1);
 465
 466             ifctx = aml_if(aml_equal(slots_nr, zero));
 467             {
 468                 aml_append(ifctx, aml_return(zero));
 469             }
 470             aml_append(method, ifctx);
 471
 472             aml_append(method, aml_store(zero, idx));
 473             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 474             /* build AML that:
 475              * loops over all slots and Notifies DIMMs with
 476              * Device Check or Eject Request notifications if
 477              * slot has corresponding status bit set and clears
 478              * slot status.
 479              */
 480             while_ctx = aml_while(aml_lless(idx, slots_nr));
 481             {
 482                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 483                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 484
 485                 aml_append(while_ctx, aml_store(idx, slot_selector));
 486                 ifctx = aml_if(aml_equal(ins_evt, one));
 487                 {
 488                     aml_append(ifctx,
 489                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 490                                          idx, dev_chk));
 491                     aml_append(ifctx, aml_store(one, ins_evt));
 492                 }
 493                 aml_append(while_ctx, ifctx);
 494
 495                 else_ctx = aml_else();
 496                 ifctx = aml_if(aml_equal(rm_evt, one));
 497                 {
 498                     aml_append(ifctx,
 499                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 500                                   idx, eject_req));
 501                     aml_append(ifctx, aml_store(one, rm_evt));
 502                 }
 503                 aml_append(else_ctx, ifctx);
 504                 aml_append(while_ctx, else_ctx);
 505
 506                 aml_append(while_ctx, aml_add(idx, one, idx));
 507             }
 508             aml_append(method, while_ctx);
 509             aml_append(method, aml_release(ctrl_lock));
 510             aml_append(method, aml_return(one));
 511         }
 512         aml_append(dev_container, method);
 513
 514         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 515         {
 516             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 517
 518             aml_append(method, aml_store(zero, ret_val));
 519             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 520             aml_append(method,
 521                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 522
 523             ifctx = aml_if(aml_equal(slot_enabled, one));
 524             {
 525                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 526             }
 527             aml_append(method, ifctx);
 528
 529             aml_append(method, aml_release(ctrl_lock));
 530             aml_append(method, aml_return(ret_val));
 531         }
 532         aml_append(dev_container, method);
 533
 534         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 535         {
 536             Aml *mr64 = aml_name("MR64");
 537             Aml *mr32 = aml_name("MR32");
 538             Aml *crs_tmpl = aml_resource_template();
 539             Aml *minl = aml_name("MINL");
 540             Aml *minh = aml_name("MINH");
 541             Aml *maxl =  aml_name("MAXL");
 542             Aml *maxh =  aml_name("MAXH");
 543             Aml *lenl = aml_name("LENL");
 544             Aml *lenh = aml_name("LENH");
 545
 546             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 547             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 548                                          slot_selector));
 549
 550             aml_append(crs_tmpl,
 551                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 552                                  AML_CACHEABLE, AML_READ_WRITE,
 553                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 554                                  0xFFFFFFFFFFFFFFFFULL));
 555             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 556             aml_append(method,
 557                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 558             aml_append(method,
 559                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 560             aml_append(method,
 561                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 562             aml_append(method,
 563                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 564             aml_append(method,
 565                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 566             aml_append(method,
 567                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 568
 569             aml_append(method,
 570                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 571             aml_append(method,
 572                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 573             aml_append(method,
 574                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 575             aml_append(method,
 576                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 577
 578             /* 64-bit math: MAX = MIN + LEN - 1 */
 579             aml_append(method, aml_add(minl, lenl, maxl));
 580             aml_append(method, aml_add(minh, lenh, maxh));
 581             ifctx = aml_if(aml_lless(maxl, minl));
 582             {
 583                 aml_append(ifctx, aml_add(maxh, one, maxh));
 584             }
 585             aml_append(method, ifctx);
 586             ifctx = aml_if(aml_lless(maxl, one));
 587             {
 588                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 589             }
 590             aml_append(method, ifctx);
 591             aml_append(method, aml_subtract(maxl, one, maxl));
 592
 593             /* return 32-bit _CRS if addr/size is in low mem */
 594             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 595             ifctx = aml_if(aml_equal(maxh, zero));
 596             {
 597                 crs_tmpl = aml_resource_template();
 598                 aml_append(crs_tmpl,
 599                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 600                                      AML_MAX_FIXED, AML_CACHEABLE,
 601                                      AML_READ_WRITE,
 602                                      0, 0x0, 0xFFFFFFFE, 0,
 603                                      0xFFFFFFFF));
 604                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 605                 aml_append(ifctx,
 606                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 607                 aml_append(ifctx,
 608                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 609                 aml_append(ifctx,
 610                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 611                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 612                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 613                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 614
 615                 aml_append(ifctx, aml_release(ctrl_lock));
 616                 aml_append(ifctx, aml_return(mr32));
 617             }
 618             aml_append(method, ifctx);
 619
 620             aml_append(method, aml_release(ctrl_lock));
 621             aml_append(method, aml_return(mr64));
 622         }
 623         aml_append(dev_container, method);
 624
 625         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 626                             AML_NOTSERIALIZED);
 627         {
 628             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 629
 630             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 631             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 632                                          slot_selector));
 633             aml_append(method, aml_store(proximity, ret_val));
 634             aml_append(method, aml_release(ctrl_lock));
 635             aml_append(method, aml_return(ret_val));
 636         }
 637         aml_append(dev_container, method);
 638
 639         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 640         {
 641             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 642             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 643
 644             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 645             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 646                                          slot_selector));
 647             aml_append(method, aml_store(aml_arg(1), ost_evt));
 648             aml_append(method, aml_store(aml_arg(2), ost_status));
 649             aml_append(method, aml_release(ctrl_lock));
 650         }
 651         aml_append(dev_container, method);
 652
 653         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 654         {
 655             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 656
 657             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 658             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 659                                          slot_selector));
 660             aml_append(method, aml_store(one, eject));
 661             aml_append(method, aml_release(ctrl_lock));
 662         }
 663         aml_append(dev_container, method);
 664
 665         /* build memory devices */
 666         for (i = 0; i < nr_mem; i++) {
 667             Aml *dev;
 668             const char *s;
 669
 670             dev = aml_device("MP%02X", i);
 671             aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 672             aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 673
 674             method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 675             s = MEMORY_SLOT_CRS_METHOD;
 676             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 677             aml_append(dev, method);
 678
 679             method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 680             s = MEMORY_SLOT_STATUS_METHOD;
 681             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 682             aml_append(dev, method);
 683
 684             method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 685             s = MEMORY_SLOT_PROXIMITY_METHOD;
 686             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 687             aml_append(dev, method);
 688
 689             method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 690             s = MEMORY_SLOT_OST_METHOD;
 691             aml_append(method,
 692                        aml_call4(s, aml_name("_UID"), aml_arg(0),
 693                                  aml_arg(1), aml_arg(2)));
 694             aml_append(dev, method);
 695
 696             method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 697             s = MEMORY_SLOT_EJECT_METHOD;
 698             aml_append(method,
 699                        aml_call2(s, aml_name("_UID"), aml_arg(0)));
 700             aml_append(dev, method);
 701
 702             aml_append(dev_container, dev);
 703         }
 704
 705         /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 706          *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 707          */
 708         method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 709         for (i = 0; i < nr_mem; i++) {
 710             ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 711             aml_append(ifctx,
 712                 aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 713             );
 714             aml_append(method, ifctx);
 715         }
 716         aml_append(dev_container, method);
 717     }
 718     aml_append(table, dev_container);
 719
 720     method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 721     aml_append(method,
 722         aml_call0(MEMORY_DEVICES_CONTAINER "." MEMORY_SLOT_SCAN_METHOD));
 723     aml_append(table, method);
 724
 725     g_free(mhp_res_path);
 726 }