LXR qemu/hw/acpi/memory

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