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_HOTPLUG_DEVICE        "MHPD"
  34
  35 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
  36 {
  37     ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
  38
  39     info->slot_type = ACPI_SLOT_TYPE_DIMM;
  40     info->slot = g_strdup_printf("%d", slot);
  41     info->source = mdev->ost_event;
  42     info->status = mdev->ost_status;
  43     if (mdev->dimm) {
  44         DeviceState *dev = DEVICE(mdev->dimm);
  45         if (dev->id) {
  46             info->device = g_strdup(dev->id);
  47             info->has_device = true;
  48         }
  49     }
  50     return info;
  51 }
  52
  53 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  54 {
  55     int i;
  56
  57     for (i = 0; i < mem_st->dev_count; i++) {
  58         ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
  59         elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
  60         elem->next = NULL;
  61         **list = elem;
  62         *list = &elem->next;
  63     }
  64 }
  65
  66 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  67                                          unsigned int size)
  68 {
  69     uint32_t val = 0;
  70     MemHotplugState *mem_st = opaque;
  71     MemStatus *mdev;
  72     Object *o;
  73
  74     if (mem_st->selector >= mem_st->dev_count) {
  75         trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  76         return 0;
  77     }
  78
  79     mdev = &mem_st->devs[mem_st->selector];
  80     o = OBJECT(mdev->dimm);
  81     switch (addr) {
  82     case 0x0: /* Lo part of phys address where DIMM is mapped */
  83         val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  84         trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  85         break;
  86     case 0x4: /* Hi part of phys address where DIMM is mapped */
  87         val =
  88             o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  89         trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  90         break;
  91     case 0x8: /* Lo part of DIMM size */
  92         val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  93         trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  94         break;
  95     case 0xc: /* Hi part of DIMM size */
  96         val =
  97             o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
  98         trace_mhp_acpi_read_size_hi(mem_st->selector, val);
  99         break;
 100     case 0x10: /* node proximity for _PXM method */
 101         val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
 102         trace_mhp_acpi_read_pxm(mem_st->selector, val);
 103         break;
 104     case 0x14: /* pack and return is_* fields */
 105         val |= mdev->is_enabled   ? 1 : 0;
 106         val |= mdev->is_inserting ? 2 : 0;
 107         val |= mdev->is_removing  ? 4 : 0;
 108         trace_mhp_acpi_read_flags(mem_st->selector, val);
 109         break;
 110     default:
 111         val = ~0;
 112         break;
 113     }
 114     return val;
 115 }
 116
 117 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 118                                       unsigned int size)
 119 {
 120     MemHotplugState *mem_st = opaque;
 121     MemStatus *mdev;
 122     ACPIOSTInfo *info;
 123     DeviceState *dev = NULL;
 124     HotplugHandler *hotplug_ctrl = NULL;
 125     Error *local_err = NULL;
 126
 127     if (!mem_st->dev_count) {
 128         return;
 129     }
 130
 131     if (addr) {
 132         if (mem_st->selector >= mem_st->dev_count) {
 133             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 134             return;
 135         }
 136     }
 137
 138     switch (addr) {
 139     case 0x0: /* DIMM slot selector */
 140         mem_st->selector = data;
 141         trace_mhp_acpi_write_slot(mem_st->selector);
 142         break;
 143     case 0x4: /* _OST event  */
 144         mdev = &mem_st->devs[mem_st->selector];
 145         if (data == 1) {
 146             /* TODO: handle device insert OST event */
 147         } else if (data == 3) {
 148             /* TODO: handle device remove OST event */
 149         }
 150         mdev->ost_event = data;
 151         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 152         break;
 153     case 0x8: /* _OST status */
 154         mdev = &mem_st->devs[mem_st->selector];
 155         mdev->ost_status = data;
 156         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 157         /* TODO: implement memory removal on guest signal */
 158
 159         info = acpi_memory_device_status(mem_st->selector, mdev);
 160         qapi_event_send_acpi_device_ost(info);
 161         qapi_free_ACPIOSTInfo(info);
 162         break;
 163     case 0x14: /* set is_* fields  */
 164         mdev = &mem_st->devs[mem_st->selector];
 165         if (data & 2) { /* clear insert event */
 166             mdev->is_inserting  = false;
 167             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 168         } else if (data & 4) {
 169             mdev->is_removing = false;
 170             trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 171         } else if (data & 8) {
 172             if (!mdev->is_enabled) {
 173                 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 174                 break;
 175             }
 176
 177             dev = DEVICE(mdev->dimm);
 178             hotplug_ctrl = qdev_get_hotplug_handler(dev);
 179             /* call pc-dimm unplug cb */
 180             hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 181             if (local_err) {
 182                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 183                 qapi_event_send_mem_unplug_error(dev->id,
 184                                                  error_get_pretty(local_err));
 185                 error_free(local_err);
 186                 break;
 187             }
 188             object_unparent(OBJECT(dev));
 189             trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 190         }
 191         break;
 192     default:
 193         break;
 194     }
 195
 196 }
 197 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 198     .read = acpi_memory_hotplug_read,
 199     .write = acpi_memory_hotplug_write,
 200     .endianness = DEVICE_LITTLE_ENDIAN,
 201     .valid = {
 202         .min_access_size = 1,
 203         .max_access_size = 4,
 204     },
 205 };
 206
 207 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 208                               MemHotplugState *state, hwaddr io_base)
 209 {
 210     MachineState *machine = MACHINE(qdev_get_machine());
 211
 212     state->dev_count = machine->ram_slots;
 213     if (!state->dev_count) {
 214         return;
 215     }
 216
 217     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 218     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 219                           "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 220     memory_region_add_subregion(as, io_base, &state->io);
 221 }
 222
 223 /**
 224  * acpi_memory_slot_status:
 225  * @mem_st: memory hotplug state
 226  * @dev: device
 227  * @errp: set in case of an error
 228  *
 229  * Obtain a single memory slot status.
 230  *
 231  * This function will be called by memory unplug request cb and unplug cb.
 232  */
 233 static MemStatus *
 234 acpi_memory_slot_status(MemHotplugState *mem_st,
 235                         DeviceState *dev, Error **errp)
 236 {
 237     Error *local_err = NULL;
 238     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 239                                        &local_err);
 240
 241     if (local_err) {
 242         error_propagate(errp, local_err);
 243         return NULL;
 244     }
 245
 246     if (slot >= mem_st->dev_count) {
 247         char *dev_path = object_get_canonical_path(OBJECT(dev));
 248         error_setg(errp, "acpi_memory_slot_status: "
 249                    "device [%s] returned invalid memory slot[%d]",
 250                     dev_path, slot);
 251         g_free(dev_path);
 252         return NULL;
 253     }
 254
 255     return &mem_st->devs[slot];
 256 }
 257
 258 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 259                          DeviceState *dev, Error **errp)
 260 {
 261     MemStatus *mdev;
 262     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 263
 264     if (!dc->hotpluggable) {
 265         return;
 266     }
 267
 268     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 269     if (!mdev) {
 270         return;
 271     }
 272
 273     mdev->dimm = dev;
 274     mdev->is_enabled = true;
 275     if (dev->hotplugged) {
 276         mdev->is_inserting = true;
 277         acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 278     }
 279 }
 280
 281 void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 282                                    MemHotplugState *mem_st,
 283                                    DeviceState *dev, Error **errp)
 284 {
 285     MemStatus *mdev;
 286
 287     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 288     if (!mdev) {
 289         return;
 290     }
 291
 292     mdev->is_removing = true;
 293     acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 294 }
 295
 296 void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 297                            DeviceState *dev, Error **errp)
 298 {
 299     MemStatus *mdev;
 300
 301     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 302     if (!mdev) {
 303         return;
 304     }
 305
 306     mdev->is_enabled = false;
 307     mdev->dimm = NULL;
 308 }
 309
 310 static const VMStateDescription vmstate_memhp_sts = {
 311     .name = "memory hotplug device state",
 312     .version_id = 1,
 313     .minimum_version_id = 1,
 314     .minimum_version_id_old = 1,
 315     .fields      = (VMStateField[]) {
 316         VMSTATE_BOOL(is_enabled, MemStatus),
 317         VMSTATE_BOOL(is_inserting, MemStatus),
 318         VMSTATE_UINT32(ost_event, MemStatus),
 319         VMSTATE_UINT32(ost_status, MemStatus),
 320         VMSTATE_END_OF_LIST()
 321     }
 322 };
 323
 324 const VMStateDescription vmstate_memory_hotplug = {
 325     .name = "memory hotplug state",
 326     .version_id = 1,
 327     .minimum_version_id = 1,
 328     .minimum_version_id_old = 1,
 329     .fields      = (VMStateField[]) {
 330         VMSTATE_UINT32(selector, MemHotplugState),
 331         VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 332                                              vmstate_memhp_sts, MemStatus),
 333         VMSTATE_END_OF_LIST()
 334     }
 335 };
 336
 337 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 338                               const char *res_root,
 339                               const char *event_handler_method,
 340                               AmlRegionSpace rs, hwaddr memhp_io_base)
 341 {
 342     int i;
 343     Aml *ifctx;
 344     Aml *method;
 345     Aml *dev_container;
 346     Aml *mem_ctrl_dev;
 347     char *mhp_res_path;
 348
 349     mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 350     mem_ctrl_dev = aml_device("%s", mhp_res_path);
 351     {
 352         Aml *crs;
 353
 354         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 355         aml_append(mem_ctrl_dev,
 356             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 357
 358         crs = aml_resource_template();
 359         if (rs == AML_SYSTEM_IO) {
 360             aml_append(crs,
 361                 aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 362                        MEMORY_HOTPLUG_IO_LEN)
 363             );
 364         } else {
 365             aml_append(crs, aml_memory32_fixed(memhp_io_base,
 366                             MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
 367         }
 368         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 369
 370         aml_append(mem_ctrl_dev, aml_operation_region(
 371             MEMORY_HOTPLUG_IO_REGION, rs,
 372             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 373         );
 374
 375     }
 376     aml_append(table, mem_ctrl_dev);
 377
 378     dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 379     {
 380         Aml *field;
 381         Aml *one = aml_int(1);
 382         Aml *zero = aml_int(0);
 383         Aml *ret_val = aml_local(0);
 384         Aml *slot_arg0 = aml_arg(0);
 385         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 386         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 387         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 388         char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 389                                           mhp_res_path);
 390
 391         aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 392         aml_append(dev_container,
 393             aml_name_decl("_UID", aml_string("DIMM devices")));
 394
 395         assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 396         aml_append(dev_container,
 397             aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 398         );
 399
 400         field = aml_field(mmio_path, AML_DWORD_ACC,
 401                           AML_NOLOCK, AML_PRESERVE);
 402         aml_append(field, /* read only */
 403             aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 404         aml_append(field, /* read only */
 405             aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 406         aml_append(field, /* read only */
 407             aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 408         aml_append(field, /* read only */
 409             aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 410         aml_append(field, /* read only */
 411             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 412         aml_append(dev_container, field);
 413
 414         field = aml_field(mmio_path, AML_BYTE_ACC,
 415                           AML_NOLOCK, AML_WRITE_AS_ZEROS);
 416         aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 417         aml_append(field, /* 1 if enabled, read only */
 418             aml_named_field(MEMORY_SLOT_ENABLED, 1));
 419         aml_append(field,
 420             /*(read) 1 if has a insert event. (write) 1 to clear event */
 421             aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 422         aml_append(field,
 423             /* (read) 1 if has a remove event. (write) 1 to clear event */
 424             aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 425         aml_append(field,
 426             /* initiates device eject, write only */
 427             aml_named_field(MEMORY_SLOT_EJECT, 1));
 428         aml_append(dev_container, field);
 429
 430         field = aml_field(mmio_path, AML_DWORD_ACC,
 431                           AML_NOLOCK, AML_PRESERVE);
 432         aml_append(field, /* DIMM selector, write only */
 433             aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 434         aml_append(field, /* _OST event code, write only */
 435             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 436         aml_append(field, /* _OST status code, write only */
 437             aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 438         aml_append(dev_container, field);
 439         g_free(mmio_path);
 440
 441         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 442         ifctx = aml_if(aml_equal(slots_nr, zero));
 443         {
 444             aml_append(ifctx, aml_return(zero));
 445         }
 446         aml_append(method, ifctx);
 447         /* present, functioning, decoding, not shown in UI */
 448         aml_append(method, aml_return(aml_int(0xB)));
 449         aml_append(dev_container, method);
 450
 451         aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 452
 453         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 454         {
 455             Aml *else_ctx;
 456             Aml *while_ctx;
 457             Aml *idx = aml_local(0);
 458             Aml *eject_req = aml_int(3);
 459             Aml *dev_chk = aml_int(1);
 460
 461             ifctx = aml_if(aml_equal(slots_nr, zero));
 462             {
 463                 aml_append(ifctx, aml_return(zero));
 464             }
 465             aml_append(method, ifctx);
 466
 467             aml_append(method, aml_store(zero, idx));
 468             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 469             /* build AML that:
 470              * loops over all slots and Notifies DIMMs with
 471              * Device Check or Eject Request notifications if
 472              * slot has corresponding status bit set and clears
 473              * slot status.
 474              */
 475             while_ctx = aml_while(aml_lless(idx, slots_nr));
 476             {
 477                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 478                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 479
 480                 aml_append(while_ctx, aml_store(idx, slot_selector));
 481                 ifctx = aml_if(aml_equal(ins_evt, one));
 482                 {
 483                     aml_append(ifctx,
 484                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 485                                          idx, dev_chk));
 486                     aml_append(ifctx, aml_store(one, ins_evt));
 487                 }
 488                 aml_append(while_ctx, ifctx);
 489
 490                 else_ctx = aml_else();
 491                 ifctx = aml_if(aml_equal(rm_evt, one));
 492                 {
 493                     aml_append(ifctx,
 494                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 495                                   idx, eject_req));
 496                     aml_append(ifctx, aml_store(one, rm_evt));
 497                 }
 498                 aml_append(else_ctx, ifctx);
 499                 aml_append(while_ctx, else_ctx);
 500
 501                 aml_append(while_ctx, aml_add(idx, one, idx));
 502             }
 503             aml_append(method, while_ctx);
 504             aml_append(method, aml_release(ctrl_lock));
 505             aml_append(method, aml_return(one));
 506         }
 507         aml_append(dev_container, method);
 508
 509         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 510         {
 511             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 512
 513             aml_append(method, aml_store(zero, ret_val));
 514             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 515             aml_append(method,
 516                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 517
 518             ifctx = aml_if(aml_equal(slot_enabled, one));
 519             {
 520                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 521             }
 522             aml_append(method, ifctx);
 523
 524             aml_append(method, aml_release(ctrl_lock));
 525             aml_append(method, aml_return(ret_val));
 526         }
 527         aml_append(dev_container, method);
 528
 529         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 530         {
 531             Aml *mr64 = aml_name("MR64");
 532             Aml *mr32 = aml_name("MR32");
 533             Aml *crs_tmpl = aml_resource_template();
 534             Aml *minl = aml_name("MINL");
 535             Aml *minh = aml_name("MINH");
 536             Aml *maxl =  aml_name("MAXL");
 537             Aml *maxh =  aml_name("MAXH");
 538             Aml *lenl = aml_name("LENL");
 539             Aml *lenh = aml_name("LENH");
 540
 541             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 542             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 543                                          slot_selector));
 544
 545             aml_append(crs_tmpl,
 546                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 547                                  AML_CACHEABLE, AML_READ_WRITE,
 548                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 549                                  0xFFFFFFFFFFFFFFFFULL));
 550             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 551             aml_append(method,
 552                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 553             aml_append(method,
 554                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 555             aml_append(method,
 556                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 557             aml_append(method,
 558                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 559             aml_append(method,
 560                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 561             aml_append(method,
 562                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 563
 564             aml_append(method,
 565                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 566             aml_append(method,
 567                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 568             aml_append(method,
 569                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 570             aml_append(method,
 571                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 572
 573             /* 64-bit math: MAX = MIN + LEN - 1 */
 574             aml_append(method, aml_add(minl, lenl, maxl));
 575             aml_append(method, aml_add(minh, lenh, maxh));
 576             ifctx = aml_if(aml_lless(maxl, minl));
 577             {
 578                 aml_append(ifctx, aml_add(maxh, one, maxh));
 579             }
 580             aml_append(method, ifctx);
 581             ifctx = aml_if(aml_lless(maxl, one));
 582             {
 583                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 584             }
 585             aml_append(method, ifctx);
 586             aml_append(method, aml_subtract(maxl, one, maxl));
 587
 588             /* return 32-bit _CRS if addr/size is in low mem */
 589             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 590             ifctx = aml_if(aml_equal(maxh, zero));
 591             {
 592                 crs_tmpl = aml_resource_template();
 593                 aml_append(crs_tmpl,
 594                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 595                                      AML_MAX_FIXED, AML_CACHEABLE,
 596                                      AML_READ_WRITE,
 597                                      0, 0x0, 0xFFFFFFFE, 0,
 598                                      0xFFFFFFFF));
 599                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 600                 aml_append(ifctx,
 601                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 602                 aml_append(ifctx,
 603                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 604                 aml_append(ifctx,
 605                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 606                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 607                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 608                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 609
 610                 aml_append(ifctx, aml_release(ctrl_lock));
 611                 aml_append(ifctx, aml_return(mr32));
 612             }
 613             aml_append(method, ifctx);
 614
 615             aml_append(method, aml_release(ctrl_lock));
 616             aml_append(method, aml_return(mr64));
 617         }
 618         aml_append(dev_container, method);
 619
 620         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 621                             AML_NOTSERIALIZED);
 622         {
 623             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 624
 625             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 626             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 627                                          slot_selector));
 628             aml_append(method, aml_store(proximity, ret_val));
 629             aml_append(method, aml_release(ctrl_lock));
 630             aml_append(method, aml_return(ret_val));
 631         }
 632         aml_append(dev_container, method);
 633
 634         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 635         {
 636             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 637             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 638
 639             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 640             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 641                                          slot_selector));
 642             aml_append(method, aml_store(aml_arg(1), ost_evt));
 643             aml_append(method, aml_store(aml_arg(2), ost_status));
 644             aml_append(method, aml_release(ctrl_lock));
 645         }
 646         aml_append(dev_container, method);
 647
 648         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 649         {
 650             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 651
 652             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 653             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 654                                          slot_selector));
 655             aml_append(method, aml_store(one, eject));
 656             aml_append(method, aml_release(ctrl_lock));
 657         }
 658         aml_append(dev_container, method);
 659
 660         /* build memory devices */
 661         for (i = 0; i < nr_mem; i++) {
 662             Aml *dev;
 663             const char *s;
 664
 665             dev = aml_device("MP%02X", i);
 666             aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 667             aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 668
 669             method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 670             s = MEMORY_SLOT_CRS_METHOD;
 671             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 672             aml_append(dev, method);
 673
 674             method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 675             s = MEMORY_SLOT_STATUS_METHOD;
 676             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 677             aml_append(dev, method);
 678
 679             method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 680             s = MEMORY_SLOT_PROXIMITY_METHOD;
 681             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 682             aml_append(dev, method);
 683
 684             method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 685             s = MEMORY_SLOT_OST_METHOD;
 686             aml_append(method,
 687                        aml_call4(s, aml_name("_UID"), aml_arg(0),
 688                                  aml_arg(1), aml_arg(2)));
 689             aml_append(dev, method);
 690
 691             method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 692             s = MEMORY_SLOT_EJECT_METHOD;
 693             aml_append(method,
 694                        aml_call2(s, aml_name("_UID"), aml_arg(0)));
 695             aml_append(dev, method);
 696
 697             aml_append(dev_container, dev);
 698         }
 699
 700         /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 701          *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 702          */
 703         method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 704         for (i = 0; i < nr_mem; i++) {
 705             ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 706             aml_append(ifctx,
 707                 aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 708             );
 709             aml_append(method, ifctx);
 710         }
 711         aml_append(dev_container, method);
 712     }
 713     aml_append(table, dev_container);
 714
 715     if (event_handler_method) {
 716         method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 717         aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
 718                                      MEMORY_SLOT_SCAN_METHOD));
 719         aml_append(table, method);
 720     }
 721
 722     g_free(mhp_res_path);
 723 }