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/error.h"
   9#include "qapi/qapi-events-misc.h"
  10
  11#define MEMORY_SLOTS_NUMBER          "MDNR"
  12#define MEMORY_HOTPLUG_IO_REGION     "HPMR"
  13#define MEMORY_SLOT_ADDR_LOW         "MRBL"
  14#define MEMORY_SLOT_ADDR_HIGH        "MRBH"
  15#define MEMORY_SLOT_SIZE_LOW         "MRLL"
  16#define MEMORY_SLOT_SIZE_HIGH        "MRLH"
  17#define MEMORY_SLOT_PROXIMITY        "MPX"
  18#define MEMORY_SLOT_ENABLED          "MES"
  19#define MEMORY_SLOT_INSERT_EVENT     "MINS"
  20#define MEMORY_SLOT_REMOVE_EVENT     "MRMV"
  21#define MEMORY_SLOT_EJECT            "MEJ"
  22#define MEMORY_SLOT_SLECTOR          "MSEL"
  23#define MEMORY_SLOT_OST_EVENT        "MOEV"
  24#define MEMORY_SLOT_OST_STATUS       "MOSC"
  25#define MEMORY_SLOT_LOCK             "MLCK"
  26#define MEMORY_SLOT_STATUS_METHOD    "MRST"
  27#define MEMORY_SLOT_CRS_METHOD       "MCRS"
  28#define MEMORY_SLOT_OST_METHOD       "MOST"
  29#define MEMORY_SLOT_PROXIMITY_METHOD "MPXM"
  30#define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
  31#define MEMORY_SLOT_NOTIFY_METHOD    "MTFY"
  32#define MEMORY_SLOT_SCAN_METHOD      "MSCN"
  33#define MEMORY_HOTPLUG_DEVICE        "MHPD"
  34#define MEMORY_HOTPLUG_IO_LEN         24
  35#define MEMORY_DEVICES_CONTAINER     "\\_SB.MHPC"
  36
  37static uint16_t memhp_io_base;
  38
  39static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
  40{
  41    ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
  42
  43    info->slot_type = ACPI_SLOT_TYPE_DIMM;
  44    info->slot = g_strdup_printf("%d", slot);
  45    info->source = mdev->ost_event;
  46    info->status = mdev->ost_status;
  47    if (mdev->dimm) {
  48        DeviceState *dev = DEVICE(mdev->dimm);
  49        if (dev->id) {
  50            info->device = g_strdup(dev->id);
  51            info->has_device = true;
  52        }
  53    }
  54    return info;
  55}
  56
  57void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  58{
  59    int i;
  60
  61    for (i = 0; i < mem_st->dev_count; i++) {
  62        ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
  63        elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
  64        elem->next = NULL;
  65        **list = elem;
  66        *list = &elem->next;
  67    }
  68}
  69
  70static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  71                                         unsigned int size)
  72{
  73    uint32_t val = 0;
  74    MemHotplugState *mem_st = opaque;
  75    MemStatus *mdev;
  76    Object *o;
  77
  78    if (mem_st->selector >= mem_st->dev_count) {
  79        trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  80        return 0;
  81    }
  82
  83    mdev = &mem_st->devs[mem_st->selector];
  84    o = OBJECT(mdev->dimm);
  85    switch (addr) {
  86    case 0x0: /* Lo part of phys address where DIMM is mapped */
  87        val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  88        trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  89        break;
  90    case 0x4: /* Hi part of phys address where DIMM is mapped */
  91        val =
  92            o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  93        trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  94        break;
  95    case 0x8: /* Lo part of DIMM size */
  96        val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  97        trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  98        break;
  99    case 0xc: /* Hi part of DIMM size */
 100        val =
 101            o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
 102        trace_mhp_acpi_read_size_hi(mem_st->selector, val);
 103        break;
 104    case 0x10: /* node proximity for _PXM method */
 105        val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
 106        trace_mhp_acpi_read_pxm(mem_st->selector, val);
 107        break;
 108    case 0x14: /* pack and return is_* fields */
 109        val |= mdev->is_enabled   ? 1 : 0;
 110        val |= mdev->is_inserting ? 2 : 0;
 111        val |= mdev->is_removing  ? 4 : 0;
 112        trace_mhp_acpi_read_flags(mem_st->selector, val);
 113        break;
 114    default:
 115        val = ~0;
 116        break;
 117    }
 118    return val;
 119}
 120
 121static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 122                                      unsigned int size)
 123{
 124    MemHotplugState *mem_st = opaque;
 125    MemStatus *mdev;
 126    ACPIOSTInfo *info;
 127    DeviceState *dev = NULL;
 128    HotplugHandler *hotplug_ctrl = NULL;
 129    Error *local_err = NULL;
 130
 131    if (!mem_st->dev_count) {
 132        return;
 133    }
 134
 135    if (addr) {
 136        if (mem_st->selector >= mem_st->dev_count) {
 137            trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 138            return;
 139        }
 140    }
 141
 142    switch (addr) {
 143    case 0x0: /* DIMM slot selector */
 144        mem_st->selector = data;
 145        trace_mhp_acpi_write_slot(mem_st->selector);
 146        break;
 147    case 0x4: /* _OST event  */
 148        mdev = &mem_st->devs[mem_st->selector];
 149        if (data == 1) {
 150            /* TODO: handle device insert OST event */
 151        } else if (data == 3) {
 152            /* TODO: handle device remove OST event */
 153        }
 154        mdev->ost_event = data;
 155        trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 156        break;
 157    case 0x8: /* _OST status */
 158        mdev = &mem_st->devs[mem_st->selector];
 159        mdev->ost_status = data;
 160        trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 161        /* TODO: implement memory removal on guest signal */
 162
 163        info = acpi_memory_device_status(mem_st->selector, mdev);
 164        qapi_event_send_acpi_device_ost(info);
 165        qapi_free_ACPIOSTInfo(info);
 166        break;
 167    case 0x14: /* set is_* fields  */
 168        mdev = &mem_st->devs[mem_st->selector];
 169        if (data & 2) { /* clear insert event */
 170            mdev->is_inserting  = false;
 171            trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 172        } else if (data & 4) {
 173            mdev->is_removing = false;
 174            trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 175        } else if (data & 8) {
 176            if (!mdev->is_enabled) {
 177                trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 178                break;
 179            }
 180
 181            dev = DEVICE(mdev->dimm);
 182            hotplug_ctrl = qdev_get_hotplug_handler(dev);
 183            /* call pc-dimm unplug cb */
 184            hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 185            if (local_err) {
 186                trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 187                qapi_event_send_mem_unplug_error(dev->id,
 188                                                 error_get_pretty(local_err));
 189                error_free(local_err);
 190                break;
 191            }
 192            object_unparent(OBJECT(dev));
 193            trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 194        }
 195        break;
 196    default:
 197        break;
 198    }
 199
 200}
 201static const MemoryRegionOps acpi_memory_hotplug_ops = {
 202    .read = acpi_memory_hotplug_read,
 203    .write = acpi_memory_hotplug_write,
 204    .endianness = DEVICE_LITTLE_ENDIAN,
 205    .valid = {
 206        .min_access_size = 1,
 207        .max_access_size = 4,
 208    },
 209};
 210
 211void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 212                              MemHotplugState *state, uint16_t io_base)
 213{
 214    MachineState *machine = MACHINE(qdev_get_machine());
 215
 216    state->dev_count = machine->ram_slots;
 217    if (!state->dev_count) {
 218        return;
 219    }
 220
 221    assert(!memhp_io_base);
 222    memhp_io_base = io_base;
 223    state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 224    memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 225                          "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 226    memory_region_add_subregion(as, memhp_io_base, &state->io);
 227}
 228
 229/**
 230 * acpi_memory_slot_status:
 231 * @mem_st: memory hotplug state
 232 * @dev: device
 233 * @errp: set in case of an error
 234 *
 235 * Obtain a single memory slot status.
 236 *
 237 * This function will be called by memory unplug request cb and unplug cb.
 238 */
 239static MemStatus *
 240acpi_memory_slot_status(MemHotplugState *mem_st,
 241                        DeviceState *dev, Error **errp)
 242{
 243    Error *local_err = NULL;
 244    int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 245                                       &local_err);
 246
 247    if (local_err) {
 248        error_propagate(errp, local_err);
 249        return NULL;
 250    }
 251
 252    if (slot >= mem_st->dev_count) {
 253        char *dev_path = object_get_canonical_path(OBJECT(dev));
 254        error_setg(errp, "acpi_memory_slot_status: "
 255                   "device [%s] returned invalid memory slot[%d]",
 256                    dev_path, slot);
 257        g_free(dev_path);
 258        return NULL;
 259    }
 260
 261    return &mem_st->devs[slot];
 262}
 263
 264void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 265                         DeviceState *dev, Error **errp)
 266{
 267    MemStatus *mdev;
 268    DeviceClass *dc = DEVICE_GET_CLASS(dev);
 269
 270    if (!dc->hotpluggable) {
 271        return;
 272    }
 273
 274    mdev = acpi_memory_slot_status(mem_st, dev, errp);
 275    if (!mdev) {
 276        return;
 277    }
 278
 279    mdev->dimm = dev;
 280    mdev->is_enabled = true;
 281    if (dev->hotplugged) {
 282        mdev->is_inserting = true;
 283        acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 284    }
 285}
 286
 287void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 288                                   MemHotplugState *mem_st,
 289                                   DeviceState *dev, Error **errp)
 290{
 291    MemStatus *mdev;
 292
 293    mdev = acpi_memory_slot_status(mem_st, dev, errp);
 294    if (!mdev) {
 295        return;
 296    }
 297
 298    mdev->is_removing = true;
 299    acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 300}
 301
 302void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 303                           DeviceState *dev, Error **errp)
 304{
 305    MemStatus *mdev;
 306
 307    mdev = acpi_memory_slot_status(mem_st, dev, errp);
 308    if (!mdev) {
 309        return;
 310    }
 311
 312    mdev->is_enabled = false;
 313    mdev->dimm = NULL;
 314}
 315
 316static const VMStateDescription vmstate_memhp_sts = {
 317    .name = "memory hotplug device state",
 318    .version_id = 1,
 319    .minimum_version_id = 1,
 320    .minimum_version_id_old = 1,
 321    .fields      = (VMStateField[]) {
 322        VMSTATE_BOOL(is_enabled, MemStatus),
 323        VMSTATE_BOOL(is_inserting, MemStatus),
 324        VMSTATE_UINT32(ost_event, MemStatus),
 325        VMSTATE_UINT32(ost_status, MemStatus),
 326        VMSTATE_END_OF_LIST()
 327    }
 328};
 329
 330const VMStateDescription vmstate_memory_hotplug = {
 331    .name = "memory hotplug state",
 332    .version_id = 1,
 333    .minimum_version_id = 1,
 334    .minimum_version_id_old = 1,
 335    .fields      = (VMStateField[]) {
 336        VMSTATE_UINT32(selector, MemHotplugState),
 337        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 338                                             vmstate_memhp_sts, MemStatus),
 339        VMSTATE_END_OF_LIST()
 340    }
 341};
 342
 343void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 344                              const char *res_root,
 345                              const char *event_handler_method)
 346{
 347    int i;
 348    Aml *ifctx;
 349    Aml *method;
 350    Aml *dev_container;
 351    Aml *mem_ctrl_dev;
 352    char *mhp_res_path;
 353
 354    if (!memhp_io_base) {
 355        return;
 356    }
 357
 358    mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 359    mem_ctrl_dev = aml_device("%s", mhp_res_path);
 360    {
 361        Aml *crs;
 362
 363        aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 364        aml_append(mem_ctrl_dev,
 365            aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 366
 367        crs = aml_resource_template();
 368        aml_append(crs,
 369            aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 370                   MEMORY_HOTPLUG_IO_LEN)
 371        );
 372        aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 373
 374        aml_append(mem_ctrl_dev, aml_operation_region(
 375            MEMORY_HOTPLUG_IO_REGION, AML_SYSTEM_IO,
 376            aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 377        );
 378
 379    }
 380    aml_append(table, mem_ctrl_dev);
 381
 382    dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 383    {
 384        Aml *field;
 385        Aml *one = aml_int(1);
 386        Aml *zero = aml_int(0);
 387        Aml *ret_val = aml_local(0);
 388        Aml *slot_arg0 = aml_arg(0);
 389        Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 390        Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 391        Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 392        char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 393                                          mhp_res_path);
 394
 395        aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 396        aml_append(dev_container,
 397            aml_name_decl("_UID", aml_string("DIMM devices")));
 398
 399        assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 400        aml_append(dev_container,
 401            aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 402        );
 403
 404        field = aml_field(mmio_path, AML_DWORD_ACC,
 405                          AML_NOLOCK, AML_PRESERVE);
 406        aml_append(field, /* read only */
 407            aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 408        aml_append(field, /* read only */
 409            aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 410        aml_append(field, /* read only */
 411            aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 412        aml_append(field, /* read only */
 413            aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 414        aml_append(field, /* read only */
 415            aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 416        aml_append(dev_container, field);
 417
 418        field = aml_field(mmio_path, AML_BYTE_ACC,
 419                          AML_NOLOCK, AML_WRITE_AS_ZEROS);
 420        aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 421        aml_append(field, /* 1 if enabled, read only */
 422            aml_named_field(MEMORY_SLOT_ENABLED, 1));
 423        aml_append(field,
 424            /*(read) 1 if has a insert event. (write) 1 to clear event */
 425            aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 426        aml_append(field,
 427            /* (read) 1 if has a remove event. (write) 1 to clear event */
 428            aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 429        aml_append(field,
 430            /* initiates device eject, write only */
 431            aml_named_field(MEMORY_SLOT_EJECT, 1));
 432        aml_append(dev_container, field);
 433
 434        field = aml_field(mmio_path, AML_DWORD_ACC,
 435                          AML_NOLOCK, AML_PRESERVE);
 436        aml_append(field, /* DIMM selector, write only */
 437            aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 438        aml_append(field, /* _OST event code, write only */
 439            aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 440        aml_append(field, /* _OST status code, write only */
 441            aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 442        aml_append(dev_container, field);
 443        g_free(mmio_path);
 444
 445        method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 446        ifctx = aml_if(aml_equal(slots_nr, zero));
 447        {
 448            aml_append(ifctx, aml_return(zero));
 449        }
 450        aml_append(method, ifctx);
 451        /* present, functioning, decoding, not shown in UI */
 452        aml_append(method, aml_return(aml_int(0xB)));
 453        aml_append(dev_container, method);
 454
 455        aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 456
 457        method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 458        {
 459            Aml *else_ctx;
 460            Aml *while_ctx;
 461            Aml *idx = aml_local(0);
 462            Aml *eject_req = aml_int(3);
 463            Aml *dev_chk = aml_int(1);
 464
 465            ifctx = aml_if(aml_equal(slots_nr, zero));
 466            {
 467                aml_append(ifctx, aml_return(zero));
 468            }
 469            aml_append(method, ifctx);
 470
 471            aml_append(method, aml_store(zero, idx));
 472            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 473            /* build AML that:
 474             * loops over all slots and Notifies DIMMs with
 475             * Device Check or Eject Request notifications if
 476             * slot has corresponding status bit set and clears
 477             * slot status.
 478             */
 479            while_ctx = aml_while(aml_lless(idx, slots_nr));
 480            {
 481                Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 482                Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 483
 484                aml_append(while_ctx, aml_store(idx, slot_selector));
 485                ifctx = aml_if(aml_equal(ins_evt, one));
 486                {
 487                    aml_append(ifctx,
 488                               aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 489                                         idx, dev_chk));
 490                    aml_append(ifctx, aml_store(one, ins_evt));
 491                }
 492                aml_append(while_ctx, ifctx);
 493
 494                else_ctx = aml_else();
 495                ifctx = aml_if(aml_equal(rm_evt, one));
 496                {
 497                    aml_append(ifctx,
 498                        aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 499                                  idx, eject_req));
 500                    aml_append(ifctx, aml_store(one, rm_evt));
 501                }
 502                aml_append(else_ctx, ifctx);
 503                aml_append(while_ctx, else_ctx);
 504
 505                aml_append(while_ctx, aml_add(idx, one, idx));
 506            }
 507            aml_append(method, while_ctx);
 508            aml_append(method, aml_release(ctrl_lock));
 509            aml_append(method, aml_return(one));
 510        }
 511        aml_append(dev_container, method);
 512
 513        method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 514        {
 515            Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 516
 517            aml_append(method, aml_store(zero, ret_val));
 518            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 519            aml_append(method,
 520                aml_store(aml_to_integer(slot_arg0), slot_selector));
 521
 522            ifctx = aml_if(aml_equal(slot_enabled, one));
 523            {
 524                aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 525            }
 526            aml_append(method, ifctx);
 527
 528            aml_append(method, aml_release(ctrl_lock));
 529            aml_append(method, aml_return(ret_val));
 530        }
 531        aml_append(dev_container, method);
 532
 533        method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 534        {
 535            Aml *mr64 = aml_name("MR64");
 536            Aml *mr32 = aml_name("MR32");
 537            Aml *crs_tmpl = aml_resource_template();
 538            Aml *minl = aml_name("MINL");
 539            Aml *minh = aml_name("MINH");
 540            Aml *maxl =  aml_name("MAXL");
 541            Aml *maxh =  aml_name("MAXH");
 542            Aml *lenl = aml_name("LENL");
 543            Aml *lenh = aml_name("LENH");
 544
 545            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 546            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 547                                         slot_selector));
 548
 549            aml_append(crs_tmpl,
 550                aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 551                                 AML_CACHEABLE, AML_READ_WRITE,
 552                                 0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 553                                 0xFFFFFFFFFFFFFFFFULL));
 554            aml_append(method, aml_name_decl("MR64", crs_tmpl));
 555            aml_append(method,
 556                aml_create_dword_field(mr64, aml_int(14), "MINL"));
 557            aml_append(method,
 558                aml_create_dword_field(mr64, aml_int(18), "MINH"));
 559            aml_append(method,
 560                aml_create_dword_field(mr64, aml_int(38), "LENL"));
 561            aml_append(method,
 562                aml_create_dword_field(mr64, aml_int(42), "LENH"));
 563            aml_append(method,
 564                aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 565            aml_append(method,
 566                aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 567
 568            aml_append(method,
 569                aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 570            aml_append(method,
 571                aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 572            aml_append(method,
 573                aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 574            aml_append(method,
 575                aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 576
 577            /* 64-bit math: MAX = MIN + LEN - 1 */
 578            aml_append(method, aml_add(minl, lenl, maxl));
 579            aml_append(method, aml_add(minh, lenh, maxh));
 580            ifctx = aml_if(aml_lless(maxl, minl));
 581            {
 582                aml_append(ifctx, aml_add(maxh, one, maxh));
 583            }
 584            aml_append(method, ifctx);
 585            ifctx = aml_if(aml_lless(maxl, one));
 586            {
 587                aml_append(ifctx, aml_subtract(maxh, one, maxh));
 588            }
 589            aml_append(method, ifctx);
 590            aml_append(method, aml_subtract(maxl, one, maxl));
 591
 592            /* return 32-bit _CRS if addr/size is in low mem */
 593            /* TODO: remove it since all hotplugged DIMMs are in high mem */
 594            ifctx = aml_if(aml_equal(maxh, zero));
 595            {
 596                crs_tmpl = aml_resource_template();
 597                aml_append(crs_tmpl,
 598                    aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 599                                     AML_MAX_FIXED, AML_CACHEABLE,
 600                                     AML_READ_WRITE,
 601                                     0, 0x0, 0xFFFFFFFE, 0,
 602                                     0xFFFFFFFF));
 603                aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 604                aml_append(ifctx,
 605                    aml_create_dword_field(mr32, aml_int(10), "MIN"));
 606                aml_append(ifctx,
 607                    aml_create_dword_field(mr32, aml_int(14), "MAX"));
 608                aml_append(ifctx,
 609                    aml_create_dword_field(mr32, aml_int(22), "LEN"));
 610                aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 611                aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 612                aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 613
 614                aml_append(ifctx, aml_release(ctrl_lock));
 615                aml_append(ifctx, aml_return(mr32));
 616            }
 617            aml_append(method, ifctx);
 618
 619            aml_append(method, aml_release(ctrl_lock));
 620            aml_append(method, aml_return(mr64));
 621        }
 622        aml_append(dev_container, method);
 623
 624        method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 625                            AML_NOTSERIALIZED);
 626        {
 627            Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 628
 629            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 630            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 631                                         slot_selector));
 632            aml_append(method, aml_store(proximity, ret_val));
 633            aml_append(method, aml_release(ctrl_lock));
 634            aml_append(method, aml_return(ret_val));
 635        }
 636        aml_append(dev_container, method);
 637
 638        method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 639        {
 640            Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 641            Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 642
 643            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 644            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 645                                         slot_selector));
 646            aml_append(method, aml_store(aml_arg(1), ost_evt));
 647            aml_append(method, aml_store(aml_arg(2), ost_status));
 648            aml_append(method, aml_release(ctrl_lock));
 649        }
 650        aml_append(dev_container, method);
 651
 652        method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 653        {
 654            Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 655
 656            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 657            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 658                                         slot_selector));
 659            aml_append(method, aml_store(one, eject));
 660            aml_append(method, aml_release(ctrl_lock));
 661        }
 662        aml_append(dev_container, method);
 663
 664        /* build memory devices */
 665        for (i = 0; i < nr_mem; i++) {
 666            Aml *dev;
 667            const char *s;
 668
 669            dev = aml_device("MP%02X", i);
 670            aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 671            aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 672
 673            method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 674            s = MEMORY_SLOT_CRS_METHOD;
 675            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 676            aml_append(dev, method);
 677
 678            method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 679            s = MEMORY_SLOT_STATUS_METHOD;
 680            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 681            aml_append(dev, method);
 682
 683            method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 684            s = MEMORY_SLOT_PROXIMITY_METHOD;
 685            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 686            aml_append(dev, method);
 687
 688            method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 689            s = MEMORY_SLOT_OST_METHOD;
 690            aml_append(method,
 691                       aml_call4(s, aml_name("_UID"), aml_arg(0),
 692                                 aml_arg(1), aml_arg(2)));
 693            aml_append(dev, method);
 694
 695            method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 696            s = MEMORY_SLOT_EJECT_METHOD;
 697            aml_append(method,
 698                       aml_call2(s, aml_name("_UID"), aml_arg(0)));
 699            aml_append(dev, method);
 700
 701            aml_append(dev_container, dev);
 702        }
 703
 704        /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 705         *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 706         */
 707        method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 708        for (i = 0; i < nr_mem; i++) {
 709            ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 710            aml_append(ifctx,
 711                aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 712            );
 713            aml_append(method, ifctx);
 714        }
 715        aml_append(dev_container, method);
 716    }
 717    aml_append(table, dev_container);
 718
 719    method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 720    aml_append(method,
 721        aml_call0(MEMORY_DEVICES_CONTAINER "." MEMORY_SLOT_SCAN_METHOD));
 722    aml_append(table, method);
 723
 724    g_free(mhp_res_path);
 725}
 726