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-machine.h"
  11 #include "qapi/qapi-events-misc.h"
  12
  13 #define MEMORY_SLOTS_NUMBER          "MDNR"
  14 #define MEMORY_HOTPLUG_IO_REGION     "HPMR"
  15 #define MEMORY_SLOT_ADDR_LOW         "MRBL"
  16 #define MEMORY_SLOT_ADDR_HIGH        "MRBH"
  17 #define MEMORY_SLOT_SIZE_LOW         "MRLL"
  18 #define MEMORY_SLOT_SIZE_HIGH        "MRLH"
  19 #define MEMORY_SLOT_PROXIMITY        "MPX"
  20 #define MEMORY_SLOT_ENABLED          "MES"
  21 #define MEMORY_SLOT_INSERT_EVENT     "MINS"
  22 #define MEMORY_SLOT_REMOVE_EVENT     "MRMV"
  23 #define MEMORY_SLOT_EJECT            "MEJ"
  24 #define MEMORY_SLOT_SLECTOR          "MSEL"
  25 #define MEMORY_SLOT_OST_EVENT        "MOEV"
  26 #define MEMORY_SLOT_OST_STATUS       "MOSC"
  27 #define MEMORY_SLOT_LOCK             "MLCK"
  28 #define MEMORY_SLOT_STATUS_METHOD    "MRST"
  29 #define MEMORY_SLOT_CRS_METHOD       "MCRS"
  30 #define MEMORY_SLOT_OST_METHOD       "MOST"
  31 #define MEMORY_SLOT_PROXIMITY_METHOD "MPXM"
  32 #define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
  33 #define MEMORY_SLOT_NOTIFY_METHOD    "MTFY"
  34 #define MEMORY_HOTPLUG_DEVICE        "MHPD"
  35
  36 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
  37 {
  38     ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
  39
  40     info->slot_type = ACPI_SLOT_TYPE_DIMM;
  41     info->slot = g_strdup_printf("%d", slot);
  42     info->source = mdev->ost_event;
  43     info->status = mdev->ost_status;
  44     if (mdev->dimm) {
  45         DeviceState *dev = DEVICE(mdev->dimm);
  46         if (dev->id) {
  47             info->device = g_strdup(dev->id);
  48             info->has_device = true;
  49         }
  50     }
  51     return info;
  52 }
  53
  54 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  55 {
  56     int i;
  57
  58     for (i = 0; i < mem_st->dev_count; i++) {
  59         ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
  60         elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
  61         elem->next = NULL;
  62         **list = elem;
  63         *list = &elem->next;
  64     }
  65 }
  66
  67 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  68                                          unsigned int size)
  69 {
  70     uint32_t val = 0;
  71     MemHotplugState *mem_st = opaque;
  72     MemStatus *mdev;
  73     Object *o;
  74
  75     if (mem_st->selector >= mem_st->dev_count) {
  76         trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  77         return 0;
  78     }
  79
  80     mdev = &mem_st->devs[mem_st->selector];
  81     o = OBJECT(mdev->dimm);
  82     switch (addr) {
  83     case 0x0: /* Lo part of phys address where DIMM is mapped */
  84         val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  85         trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  86         break;
  87     case 0x4: /* Hi part of phys address where DIMM is mapped */
  88         val =
  89             o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  90         trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  91         break;
  92     case 0x8: /* Lo part of DIMM size */
  93         val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  94         trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  95         break;
  96     case 0xc: /* Hi part of DIMM size */
  97         val =
  98             o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
  99         trace_mhp_acpi_read_size_hi(mem_st->selector, val);
 100         break;
 101     case 0x10: /* node proximity for _PXM method */
 102         val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
 103         trace_mhp_acpi_read_pxm(mem_st->selector, val);
 104         break;
 105     case 0x14: /* pack and return is_* fields */
 106         val |= mdev->is_enabled   ? 1 : 0;
 107         val |= mdev->is_inserting ? 2 : 0;
 108         val |= mdev->is_removing  ? 4 : 0;
 109         trace_mhp_acpi_read_flags(mem_st->selector, val);
 110         break;
 111     default:
 112         val = ~0;
 113         break;
 114     }
 115     return val;
 116 }
 117
 118 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 119                                       unsigned int size)
 120 {
 121     MemHotplugState *mem_st = opaque;
 122     MemStatus *mdev;
 123     ACPIOSTInfo *info;
 124     DeviceState *dev = NULL;
 125     HotplugHandler *hotplug_ctrl = NULL;
 126     Error *local_err = NULL;
 127
 128     if (!mem_st->dev_count) {
 129         return;
 130     }
 131
 132     if (addr) {
 133         if (mem_st->selector >= mem_st->dev_count) {
 134             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 135             return;
 136         }
 137     }
 138
 139     switch (addr) {
 140     case 0x0: /* DIMM slot selector */
 141         mem_st->selector = data;
 142         trace_mhp_acpi_write_slot(mem_st->selector);
 143         break;
 144     case 0x4: /* _OST event  */
 145         mdev = &mem_st->devs[mem_st->selector];
 146         if (data == 1) {
 147             /* TODO: handle device insert OST event */
 148         } else if (data == 3) {
 149             /* TODO: handle device remove OST event */
 150         }
 151         mdev->ost_event = data;
 152         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 153         break;
 154     case 0x8: /* _OST status */
 155         mdev = &mem_st->devs[mem_st->selector];
 156         mdev->ost_status = data;
 157         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 158         /* TODO: implement memory removal on guest signal */
 159
 160         info = acpi_memory_device_status(mem_st->selector, mdev);
 161         qapi_event_send_acpi_device_ost(info);
 162         qapi_free_ACPIOSTInfo(info);
 163         break;
 164     case 0x14: /* set is_* fields  */
 165         mdev = &mem_st->devs[mem_st->selector];
 166         if (data & 2) { /* clear insert event */
 167             mdev->is_inserting  = false;
 168             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 169         } else if (data & 4) {
 170             mdev->is_removing = false;
 171             trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 172         } else if (data & 8) {
 173             if (!mdev->is_enabled) {
 174                 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 175                 break;
 176             }
 177
 178             dev = DEVICE(mdev->dimm);
 179             hotplug_ctrl = qdev_get_hotplug_handler(dev);
 180             /* call pc-dimm unplug cb */
 181             hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 182             if (local_err) {
 183                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 184                 qapi_event_send_mem_unplug_error(dev->id,
 185                                                  error_get_pretty(local_err));
 186                 error_free(local_err);
 187                 break;
 188             }
 189             object_unparent(OBJECT(dev));
 190             trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 191         }
 192         break;
 193     default:
 194         break;
 195     }
 196
 197 }
 198 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 199     .read = acpi_memory_hotplug_read,
 200     .write = acpi_memory_hotplug_write,
 201     .endianness = DEVICE_LITTLE_ENDIAN,
 202     .valid = {
 203         .min_access_size = 1,
 204         .max_access_size = 4,
 205     },
 206 };
 207
 208 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 209                               MemHotplugState *state, hwaddr io_base)
 210 {
 211     MachineState *machine = MACHINE(qdev_get_machine());
 212
 213     state->dev_count = machine->ram_slots;
 214     if (!state->dev_count) {
 215         return;
 216     }
 217
 218     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 219     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 220                           "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 221     memory_region_add_subregion(as, io_base, &state->io);
 222 }
 223
 224 /**
 225  * acpi_memory_slot_status:
 226  * @mem_st: memory hotplug state
 227  * @dev: device
 228  * @errp: set in case of an error
 229  *
 230  * Obtain a single memory slot status.
 231  *
 232  * This function will be called by memory unplug request cb and unplug cb.
 233  */
 234 static MemStatus *
 235 acpi_memory_slot_status(MemHotplugState *mem_st,
 236                         DeviceState *dev, Error **errp)
 237 {
 238     Error *local_err = NULL;
 239     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 240                                        &local_err);
 241
 242     if (local_err) {
 243         error_propagate(errp, local_err);
 244         return NULL;
 245     }
 246
 247     if (slot >= mem_st->dev_count) {
 248         char *dev_path = object_get_canonical_path(OBJECT(dev));
 249         error_setg(errp, "acpi_memory_slot_status: "
 250                    "device [%s] returned invalid memory slot[%d]",
 251                     dev_path, slot);
 252         g_free(dev_path);
 253         return NULL;
 254     }
 255
 256     return &mem_st->devs[slot];
 257 }
 258
 259 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 260                          DeviceState *dev, Error **errp)
 261 {
 262     MemStatus *mdev;
 263     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 264
 265     if (!dc->hotpluggable) {
 266         return;
 267     }
 268
 269     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 270     if (!mdev) {
 271         return;
 272     }
 273
 274     mdev->dimm = dev;
 275     mdev->is_enabled = true;
 276     if (dev->hotplugged) {
 277         mdev->is_inserting = true;
 278         acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 279     }
 280 }
 281
 282 void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 283                                    MemHotplugState *mem_st,
 284                                    DeviceState *dev, Error **errp)
 285 {
 286     MemStatus *mdev;
 287
 288     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 289     if (!mdev) {
 290         return;
 291     }
 292
 293     mdev->is_removing = true;
 294     acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 295 }
 296
 297 void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 298                            DeviceState *dev, Error **errp)
 299 {
 300     MemStatus *mdev;
 301
 302     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 303     if (!mdev) {
 304         return;
 305     }
 306
 307     mdev->is_enabled = false;
 308     mdev->dimm = NULL;
 309 }
 310
 311 static const VMStateDescription vmstate_memhp_sts = {
 312     .name = "memory hotplug device state",
 313     .version_id = 1,
 314     .minimum_version_id = 1,
 315     .minimum_version_id_old = 1,
 316     .fields      = (VMStateField[]) {
 317         VMSTATE_BOOL(is_enabled, MemStatus),
 318         VMSTATE_BOOL(is_inserting, MemStatus),
 319         VMSTATE_UINT32(ost_event, MemStatus),
 320         VMSTATE_UINT32(ost_status, MemStatus),
 321         VMSTATE_END_OF_LIST()
 322     }
 323 };
 324
 325 const VMStateDescription vmstate_memory_hotplug = {
 326     .name = "memory hotplug state",
 327     .version_id = 1,
 328     .minimum_version_id = 1,
 329     .minimum_version_id_old = 1,
 330     .fields      = (VMStateField[]) {
 331         VMSTATE_UINT32(selector, MemHotplugState),
 332         VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 333                                              vmstate_memhp_sts, MemStatus),
 334         VMSTATE_END_OF_LIST()
 335     }
 336 };
 337
 338 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 339                               const char *res_root,
 340                               const char *event_handler_method,
 341                               AmlRegionSpace rs, hwaddr memhp_io_base)
 342 {
 343     int i;
 344     Aml *ifctx;
 345     Aml *method;
 346     Aml *dev_container;
 347     Aml *mem_ctrl_dev;
 348     char *mhp_res_path;
 349
 350     mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 351     mem_ctrl_dev = aml_device("%s", mhp_res_path);
 352     {
 353         Aml *crs;
 354
 355         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 356         aml_append(mem_ctrl_dev,
 357             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 358
 359         crs = aml_resource_template();
 360         if (rs == AML_SYSTEM_IO) {
 361             aml_append(crs,
 362                 aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 363                        MEMORY_HOTPLUG_IO_LEN)
 364             );
 365         } else {
 366             aml_append(crs, aml_memory32_fixed(memhp_io_base,
 367                             MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
 368         }
 369         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 370
 371         aml_append(mem_ctrl_dev, aml_operation_region(
 372             MEMORY_HOTPLUG_IO_REGION, rs,
 373             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 374         );
 375
 376     }
 377     aml_append(table, mem_ctrl_dev);
 378
 379     dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 380     {
 381         Aml *field;
 382         Aml *one = aml_int(1);
 383         Aml *zero = aml_int(0);
 384         Aml *ret_val = aml_local(0);
 385         Aml *slot_arg0 = aml_arg(0);
 386         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 387         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 388         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 389         char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 390                                           mhp_res_path);
 391
 392         aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 393         aml_append(dev_container,
 394             aml_name_decl("_UID", aml_string("DIMM devices")));
 395
 396         assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 397         aml_append(dev_container,
 398             aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 399         );
 400
 401         field = aml_field(mmio_path, AML_DWORD_ACC,
 402                           AML_NOLOCK, AML_PRESERVE);
 403         aml_append(field, /* read only */
 404             aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 405         aml_append(field, /* read only */
 406             aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 407         aml_append(field, /* read only */
 408             aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 409         aml_append(field, /* read only */
 410             aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 411         aml_append(field, /* read only */
 412             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 413         aml_append(dev_container, field);
 414
 415         field = aml_field(mmio_path, AML_BYTE_ACC,
 416                           AML_NOLOCK, AML_WRITE_AS_ZEROS);
 417         aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 418         aml_append(field, /* 1 if enabled, read only */
 419             aml_named_field(MEMORY_SLOT_ENABLED, 1));
 420         aml_append(field,
 421             /*(read) 1 if has a insert event. (write) 1 to clear event */
 422             aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 423         aml_append(field,
 424             /* (read) 1 if has a remove event. (write) 1 to clear event */
 425             aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 426         aml_append(field,
 427             /* initiates device eject, write only */
 428             aml_named_field(MEMORY_SLOT_EJECT, 1));
 429         aml_append(dev_container, field);
 430
 431         field = aml_field(mmio_path, AML_DWORD_ACC,
 432                           AML_NOLOCK, AML_PRESERVE);
 433         aml_append(field, /* DIMM selector, write only */
 434             aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 435         aml_append(field, /* _OST event code, write only */
 436             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 437         aml_append(field, /* _OST status code, write only */
 438             aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 439         aml_append(dev_container, field);
 440         g_free(mmio_path);
 441
 442         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 443         ifctx = aml_if(aml_equal(slots_nr, zero));
 444         {
 445             aml_append(ifctx, aml_return(zero));
 446         }
 447         aml_append(method, ifctx);
 448         /* present, functioning, decoding, not shown in UI */
 449         aml_append(method, aml_return(aml_int(0xB)));
 450         aml_append(dev_container, method);
 451
 452         aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 453
 454         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 455         {
 456             Aml *else_ctx;
 457             Aml *while_ctx;
 458             Aml *idx = aml_local(0);
 459             Aml *eject_req = aml_int(3);
 460             Aml *dev_chk = aml_int(1);
 461
 462             ifctx = aml_if(aml_equal(slots_nr, zero));
 463             {
 464                 aml_append(ifctx, aml_return(zero));
 465             }
 466             aml_append(method, ifctx);
 467
 468             aml_append(method, aml_store(zero, idx));
 469             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 470             /* build AML that:
 471              * loops over all slots and Notifies DIMMs with
 472              * Device Check or Eject Request notifications if
 473              * slot has corresponding status bit set and clears
 474              * slot status.
 475              */
 476             while_ctx = aml_while(aml_lless(idx, slots_nr));
 477             {
 478                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 479                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 480
 481                 aml_append(while_ctx, aml_store(idx, slot_selector));
 482                 ifctx = aml_if(aml_equal(ins_evt, one));
 483                 {
 484                     aml_append(ifctx,
 485                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 486                                          idx, dev_chk));
 487                     aml_append(ifctx, aml_store(one, ins_evt));
 488                 }
 489                 aml_append(while_ctx, ifctx);
 490
 491                 else_ctx = aml_else();
 492                 ifctx = aml_if(aml_equal(rm_evt, one));
 493                 {
 494                     aml_append(ifctx,
 495                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 496                                   idx, eject_req));
 497                     aml_append(ifctx, aml_store(one, rm_evt));
 498                 }
 499                 aml_append(else_ctx, ifctx);
 500                 aml_append(while_ctx, else_ctx);
 501
 502                 aml_append(while_ctx, aml_add(idx, one, idx));
 503             }
 504             aml_append(method, while_ctx);
 505             aml_append(method, aml_release(ctrl_lock));
 506             aml_append(method, aml_return(one));
 507         }
 508         aml_append(dev_container, method);
 509
 510         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 511         {
 512             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 513
 514             aml_append(method, aml_store(zero, ret_val));
 515             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 516             aml_append(method,
 517                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 518
 519             ifctx = aml_if(aml_equal(slot_enabled, one));
 520             {
 521                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 522             }
 523             aml_append(method, ifctx);
 524
 525             aml_append(method, aml_release(ctrl_lock));
 526             aml_append(method, aml_return(ret_val));
 527         }
 528         aml_append(dev_container, method);
 529
 530         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 531         {
 532             Aml *mr64 = aml_name("MR64");
 533             Aml *mr32 = aml_name("MR32");
 534             Aml *crs_tmpl = aml_resource_template();
 535             Aml *minl = aml_name("MINL");
 536             Aml *minh = aml_name("MINH");
 537             Aml *maxl =  aml_name("MAXL");
 538             Aml *maxh =  aml_name("MAXH");
 539             Aml *lenl = aml_name("LENL");
 540             Aml *lenh = aml_name("LENH");
 541
 542             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 543             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 544                                          slot_selector));
 545
 546             aml_append(crs_tmpl,
 547                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 548                                  AML_CACHEABLE, AML_READ_WRITE,
 549                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 550                                  0xFFFFFFFFFFFFFFFFULL));
 551             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 552             aml_append(method,
 553                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 554             aml_append(method,
 555                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 556             aml_append(method,
 557                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 558             aml_append(method,
 559                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 560             aml_append(method,
 561                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 562             aml_append(method,
 563                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 564
 565             aml_append(method,
 566                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 567             aml_append(method,
 568                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 569             aml_append(method,
 570                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 571             aml_append(method,
 572                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 573
 574             /* 64-bit math: MAX = MIN + LEN - 1 */
 575             aml_append(method, aml_add(minl, lenl, maxl));
 576             aml_append(method, aml_add(minh, lenh, maxh));
 577             ifctx = aml_if(aml_lless(maxl, minl));
 578             {
 579                 aml_append(ifctx, aml_add(maxh, one, maxh));
 580             }
 581             aml_append(method, ifctx);
 582             ifctx = aml_if(aml_lless(maxl, one));
 583             {
 584                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 585             }
 586             aml_append(method, ifctx);
 587             aml_append(method, aml_subtract(maxl, one, maxl));
 588
 589             /* return 32-bit _CRS if addr/size is in low mem */
 590             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 591             ifctx = aml_if(aml_equal(maxh, zero));
 592             {
 593                 crs_tmpl = aml_resource_template();
 594                 aml_append(crs_tmpl,
 595                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 596                                      AML_MAX_FIXED, AML_CACHEABLE,
 597                                      AML_READ_WRITE,
 598                                      0, 0x0, 0xFFFFFFFE, 0,
 599                                      0xFFFFFFFF));
 600                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 601                 aml_append(ifctx,
 602                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 603                 aml_append(ifctx,
 604                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 605                 aml_append(ifctx,
 606                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 607                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 608                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 609                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 610
 611                 aml_append(ifctx, aml_release(ctrl_lock));
 612                 aml_append(ifctx, aml_return(mr32));
 613             }
 614             aml_append(method, ifctx);
 615
 616             aml_append(method, aml_release(ctrl_lock));
 617             aml_append(method, aml_return(mr64));
 618         }
 619         aml_append(dev_container, method);
 620
 621         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 622                             AML_NOTSERIALIZED);
 623         {
 624             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 625
 626             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 627             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 628                                          slot_selector));
 629             aml_append(method, aml_store(proximity, ret_val));
 630             aml_append(method, aml_release(ctrl_lock));
 631             aml_append(method, aml_return(ret_val));
 632         }
 633         aml_append(dev_container, method);
 634
 635         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 636         {
 637             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 638             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 639
 640             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 641             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 642                                          slot_selector));
 643             aml_append(method, aml_store(aml_arg(1), ost_evt));
 644             aml_append(method, aml_store(aml_arg(2), ost_status));
 645             aml_append(method, aml_release(ctrl_lock));
 646         }
 647         aml_append(dev_container, method);
 648
 649         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 650         {
 651             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 652
 653             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 654             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 655                                          slot_selector));
 656             aml_append(method, aml_store(one, eject));
 657             aml_append(method, aml_release(ctrl_lock));
 658         }
 659         aml_append(dev_container, method);
 660
 661         /* build memory devices */
 662         for (i = 0; i < nr_mem; i++) {
 663             Aml *dev;
 664             const char *s;
 665
 666             dev = aml_device("MP%02X", i);
 667             aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 668             aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 669
 670             method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 671             s = MEMORY_SLOT_CRS_METHOD;
 672             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 673             aml_append(dev, method);
 674
 675             method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 676             s = MEMORY_SLOT_STATUS_METHOD;
 677             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 678             aml_append(dev, method);
 679
 680             method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 681             s = MEMORY_SLOT_PROXIMITY_METHOD;
 682             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 683             aml_append(dev, method);
 684
 685             method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 686             s = MEMORY_SLOT_OST_METHOD;
 687             aml_append(method,
 688                        aml_call4(s, aml_name("_UID"), aml_arg(0),
 689                                  aml_arg(1), aml_arg(2)));
 690             aml_append(dev, method);
 691
 692             method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 693             s = MEMORY_SLOT_EJECT_METHOD;
 694             aml_append(method,
 695                        aml_call2(s, aml_name("_UID"), aml_arg(0)));
 696             aml_append(dev, method);
 697
 698             aml_append(dev_container, dev);
 699         }
 700
 701         /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 702          *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 703          */
 704         method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 705         for (i = 0; i < nr_mem; i++) {
 706             ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 707             aml_append(ifctx,
 708                 aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 709             );
 710             aml_append(method, ifctx);
 711         }
 712         aml_append(dev_container, method);
 713     }
 714     aml_append(table, dev_container);
 715
 716     if (event_handler_method) {
 717         method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 718         aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
 719                                      MEMORY_SLOT_SCAN_METHOD));
 720         aml_append(table, method);
 721     }
 722
 723     g_free(mhp_res_path);
 724 }