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