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 "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
  35static 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
  53void 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
  66static 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
 117static 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}
 197static 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
 207void 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 */
 233static MemStatus *
 234acpi_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
 258void 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
 281void 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
 296void 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
 310static 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
 324const 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
 337void 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}
 724