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