hw/acpi/memory_hotplug.c

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