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/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
  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    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
  64static 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
 115static 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_mem_unplug_error(dev->id,
 182                                                 error_get_pretty(local_err));
 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}
 195static 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
 205void 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 */
 231static MemStatus *
 232acpi_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
 256void 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
 279void 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
 294void 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
 308static const VMStateDescription vmstate_memhp_sts = {
 309    .name = "memory hotplug device state",
 310    .version_id = 1,
 311    .minimum_version_id = 1,
 312    .minimum_version_id_old = 1,
 313    .fields      = (VMStateField[]) {
 314        VMSTATE_BOOL(is_enabled, MemStatus),
 315        VMSTATE_BOOL(is_inserting, MemStatus),
 316        VMSTATE_UINT32(ost_event, MemStatus),
 317        VMSTATE_UINT32(ost_status, MemStatus),
 318        VMSTATE_END_OF_LIST()
 319    }
 320};
 321
 322const VMStateDescription vmstate_memory_hotplug = {
 323    .name = "memory hotplug state",
 324    .version_id = 1,
 325    .minimum_version_id = 1,
 326    .minimum_version_id_old = 1,
 327    .fields      = (VMStateField[]) {
 328        VMSTATE_UINT32(selector, MemHotplugState),
 329        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 330                                             vmstate_memhp_sts, MemStatus),
 331        VMSTATE_END_OF_LIST()
 332    }
 333};
 334
 335void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 336                              const char *res_root,
 337                              const char *event_handler_method,
 338                              AmlRegionSpace rs, hwaddr memhp_io_base)
 339{
 340    int i;
 341    Aml *ifctx;
 342    Aml *method;
 343    Aml *dev_container;
 344    Aml *mem_ctrl_dev;
 345    char *mhp_res_path;
 346
 347    mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 348    mem_ctrl_dev = aml_device("%s", mhp_res_path);
 349    {
 350        Aml *crs;
 351
 352        aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 353        aml_append(mem_ctrl_dev,
 354            aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 355
 356        crs = aml_resource_template();
 357        if (rs == AML_SYSTEM_IO) {
 358            aml_append(crs,
 359                aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 360                       MEMORY_HOTPLUG_IO_LEN)
 361            );
 362        } else {
 363            aml_append(crs, aml_memory32_fixed(memhp_io_base,
 364                            MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
 365        }
 366        aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 367
 368        aml_append(mem_ctrl_dev, aml_operation_region(
 369            MEMORY_HOTPLUG_IO_REGION, rs,
 370            aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 371        );
 372
 373    }
 374    aml_append(table, mem_ctrl_dev);
 375
 376    dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 377    {
 378        Aml *field;
 379        Aml *one = aml_int(1);
 380        Aml *zero = aml_int(0);
 381        Aml *ret_val = aml_local(0);
 382        Aml *slot_arg0 = aml_arg(0);
 383        Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 384        Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 385        Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 386        char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 387                                          mhp_res_path);
 388
 389        aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 390        aml_append(dev_container,
 391            aml_name_decl("_UID", aml_string("DIMM devices")));
 392
 393        assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 394        aml_append(dev_container,
 395            aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 396        );
 397
 398        field = aml_field(mmio_path, AML_DWORD_ACC,
 399                          AML_NOLOCK, AML_PRESERVE);
 400        aml_append(field, /* read only */
 401            aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 402        aml_append(field, /* read only */
 403            aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 404        aml_append(field, /* read only */
 405            aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 406        aml_append(field, /* read only */
 407            aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 408        aml_append(field, /* read only */
 409            aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 410        aml_append(dev_container, field);
 411
 412        field = aml_field(mmio_path, AML_BYTE_ACC,
 413                          AML_NOLOCK, AML_WRITE_AS_ZEROS);
 414        aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 415        aml_append(field, /* 1 if enabled, read only */
 416            aml_named_field(MEMORY_SLOT_ENABLED, 1));
 417        aml_append(field,
 418            /*(read) 1 if has a insert event. (write) 1 to clear event */
 419            aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 420        aml_append(field,
 421            /* (read) 1 if has a remove event. (write) 1 to clear event */
 422            aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 423        aml_append(field,
 424            /* initiates device eject, write only */
 425            aml_named_field(MEMORY_SLOT_EJECT, 1));
 426        aml_append(dev_container, field);
 427
 428        field = aml_field(mmio_path, AML_DWORD_ACC,
 429                          AML_NOLOCK, AML_PRESERVE);
 430        aml_append(field, /* DIMM selector, write only */
 431            aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 432        aml_append(field, /* _OST event code, write only */
 433            aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 434        aml_append(field, /* _OST status code, write only */
 435            aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 436        aml_append(dev_container, field);
 437        g_free(mmio_path);
 438
 439        method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 440        ifctx = aml_if(aml_equal(slots_nr, zero));
 441        {
 442            aml_append(ifctx, aml_return(zero));
 443        }
 444        aml_append(method, ifctx);
 445        /* present, functioning, decoding, not shown in UI */
 446        aml_append(method, aml_return(aml_int(0xB)));
 447        aml_append(dev_container, method);
 448
 449        aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 450
 451        method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 452        {
 453            Aml *else_ctx;
 454            Aml *while_ctx;
 455            Aml *idx = aml_local(0);
 456            Aml *eject_req = aml_int(3);
 457            Aml *dev_chk = aml_int(1);
 458
 459            ifctx = aml_if(aml_equal(slots_nr, zero));
 460            {
 461                aml_append(ifctx, aml_return(zero));
 462            }
 463            aml_append(method, ifctx);
 464
 465            aml_append(method, aml_store(zero, idx));
 466            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 467            /* build AML that:
 468             * loops over all slots and Notifies DIMMs with
 469             * Device Check or Eject Request notifications if
 470             * slot has corresponding status bit set and clears
 471             * slot status.
 472             */
 473            while_ctx = aml_while(aml_lless(idx, slots_nr));
 474            {
 475                Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 476                Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 477
 478                aml_append(while_ctx, aml_store(idx, slot_selector));
 479                ifctx = aml_if(aml_equal(ins_evt, one));
 480                {
 481                    aml_append(ifctx,
 482                               aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 483                                         idx, dev_chk));
 484                    aml_append(ifctx, aml_store(one, ins_evt));
 485                }
 486                aml_append(while_ctx, ifctx);
 487
 488                else_ctx = aml_else();
 489                ifctx = aml_if(aml_equal(rm_evt, one));
 490                {
 491                    aml_append(ifctx,
 492                        aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 493                                  idx, eject_req));
 494                    aml_append(ifctx, aml_store(one, rm_evt));
 495                }
 496                aml_append(else_ctx, ifctx);
 497                aml_append(while_ctx, else_ctx);
 498
 499                aml_append(while_ctx, aml_add(idx, one, idx));
 500            }
 501            aml_append(method, while_ctx);
 502            aml_append(method, aml_release(ctrl_lock));
 503            aml_append(method, aml_return(one));
 504        }
 505        aml_append(dev_container, method);
 506
 507        method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 508        {
 509            Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 510
 511            aml_append(method, aml_store(zero, ret_val));
 512            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 513            aml_append(method,
 514                aml_store(aml_to_integer(slot_arg0), slot_selector));
 515
 516            ifctx = aml_if(aml_equal(slot_enabled, one));
 517            {
 518                aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 519            }
 520            aml_append(method, ifctx);
 521
 522            aml_append(method, aml_release(ctrl_lock));
 523            aml_append(method, aml_return(ret_val));
 524        }
 525        aml_append(dev_container, method);
 526
 527        method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 528        {
 529            Aml *mr64 = aml_name("MR64");
 530            Aml *mr32 = aml_name("MR32");
 531            Aml *crs_tmpl = aml_resource_template();
 532            Aml *minl = aml_name("MINL");
 533            Aml *minh = aml_name("MINH");
 534            Aml *maxl =  aml_name("MAXL");
 535            Aml *maxh =  aml_name("MAXH");
 536            Aml *lenl = aml_name("LENL");
 537            Aml *lenh = aml_name("LENH");
 538
 539            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 540            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 541                                         slot_selector));
 542
 543            aml_append(crs_tmpl,
 544                aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 545                                 AML_CACHEABLE, AML_READ_WRITE,
 546                                 0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 547                                 0xFFFFFFFFFFFFFFFFULL));
 548            aml_append(method, aml_name_decl("MR64", crs_tmpl));
 549            aml_append(method,
 550                aml_create_dword_field(mr64, aml_int(14), "MINL"));
 551            aml_append(method,
 552                aml_create_dword_field(mr64, aml_int(18), "MINH"));
 553            aml_append(method,
 554                aml_create_dword_field(mr64, aml_int(38), "LENL"));
 555            aml_append(method,
 556                aml_create_dword_field(mr64, aml_int(42), "LENH"));
 557            aml_append(method,
 558                aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 559            aml_append(method,
 560                aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 561
 562            aml_append(method,
 563                aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 564            aml_append(method,
 565                aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 566            aml_append(method,
 567                aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 568            aml_append(method,
 569                aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 570
 571            /* 64-bit math: MAX = MIN + LEN - 1 */
 572            aml_append(method, aml_add(minl, lenl, maxl));
 573            aml_append(method, aml_add(minh, lenh, maxh));
 574            ifctx = aml_if(aml_lless(maxl, minl));
 575            {
 576                aml_append(ifctx, aml_add(maxh, one, maxh));
 577            }
 578            aml_append(method, ifctx);
 579            ifctx = aml_if(aml_lless(maxl, one));
 580            {
 581                aml_append(ifctx, aml_subtract(maxh, one, maxh));
 582            }
 583            aml_append(method, ifctx);
 584            aml_append(method, aml_subtract(maxl, one, maxl));
 585
 586            /* return 32-bit _CRS if addr/size is in low mem */
 587            /* TODO: remove it since all hotplugged DIMMs are in high mem */
 588            ifctx = aml_if(aml_equal(maxh, zero));
 589            {
 590                crs_tmpl = aml_resource_template();
 591                aml_append(crs_tmpl,
 592                    aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 593                                     AML_MAX_FIXED, AML_CACHEABLE,
 594                                     AML_READ_WRITE,
 595                                     0, 0x0, 0xFFFFFFFE, 0,
 596                                     0xFFFFFFFF));
 597                aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 598                aml_append(ifctx,
 599                    aml_create_dword_field(mr32, aml_int(10), "MIN"));
 600                aml_append(ifctx,
 601                    aml_create_dword_field(mr32, aml_int(14), "MAX"));
 602                aml_append(ifctx,
 603                    aml_create_dword_field(mr32, aml_int(22), "LEN"));
 604                aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 605                aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 606                aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 607
 608                aml_append(ifctx, aml_release(ctrl_lock));
 609                aml_append(ifctx, aml_return(mr32));
 610            }
 611            aml_append(method, ifctx);
 612
 613            aml_append(method, aml_release(ctrl_lock));
 614            aml_append(method, aml_return(mr64));
 615        }
 616        aml_append(dev_container, method);
 617
 618        method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 619                            AML_NOTSERIALIZED);
 620        {
 621            Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 622
 623            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 624            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 625                                         slot_selector));
 626            aml_append(method, aml_store(proximity, ret_val));
 627            aml_append(method, aml_release(ctrl_lock));
 628            aml_append(method, aml_return(ret_val));
 629        }
 630        aml_append(dev_container, method);
 631
 632        method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 633        {
 634            Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 635            Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 636
 637            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 638            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 639                                         slot_selector));
 640            aml_append(method, aml_store(aml_arg(1), ost_evt));
 641            aml_append(method, aml_store(aml_arg(2), ost_status));
 642            aml_append(method, aml_release(ctrl_lock));
 643        }
 644        aml_append(dev_container, method);
 645
 646        method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 647        {
 648            Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 649
 650            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 651            aml_append(method, aml_store(aml_to_integer(slot_arg0),
 652                                         slot_selector));
 653            aml_append(method, aml_store(one, eject));
 654            aml_append(method, aml_release(ctrl_lock));
 655        }
 656        aml_append(dev_container, method);
 657
 658        /* build memory devices */
 659        for (i = 0; i < nr_mem; i++) {
 660            Aml *dev;
 661            const char *s;
 662
 663            dev = aml_device("MP%02X", i);
 664            aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 665            aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 666
 667            method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 668            s = MEMORY_SLOT_CRS_METHOD;
 669            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 670            aml_append(dev, method);
 671
 672            method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 673            s = MEMORY_SLOT_STATUS_METHOD;
 674            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 675            aml_append(dev, method);
 676
 677            method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 678            s = MEMORY_SLOT_PROXIMITY_METHOD;
 679            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 680            aml_append(dev, method);
 681
 682            method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 683            s = MEMORY_SLOT_OST_METHOD;
 684            aml_append(method,
 685                       aml_call4(s, aml_name("_UID"), aml_arg(0),
 686                                 aml_arg(1), aml_arg(2)));
 687            aml_append(dev, method);
 688
 689            method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 690            s = MEMORY_SLOT_EJECT_METHOD;
 691            aml_append(method,
 692                       aml_call2(s, aml_name("_UID"), aml_arg(0)));
 693            aml_append(dev, method);
 694
 695            aml_append(dev_container, dev);
 696        }
 697
 698        /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 699         *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 700         */
 701        method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 702        for (i = 0; i < nr_mem; i++) {
 703            ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 704            aml_append(ifctx,
 705                aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 706            );
 707            aml_append(method, ifctx);
 708        }
 709        aml_append(dev_container, method);
 710    }
 711    aml_append(table, dev_container);
 712
 713    if (event_handler_method) {
 714        method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 715        aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
 716                                     MEMORY_SLOT_SCAN_METHOD));
 717        aml_append(table, method);
 718    }
 719
 720    g_free(mhp_res_path);
 721}
 722