hw/acpi/memory_hotplug.c

   1 #include "qemu/osdep.h"
   2 #include "hw/acpi/memory_hotplug.h"
   3 #include "hw/mem/pc-dimm.h"
   4 #include "hw/qdev-core.h"
   5 #include "migration/vmstate.h"
   6 #include "trace.h"
   7 #include "qapi/error.h"
   8 #include "qapi/qapi-events-acpi.h"
   9 #include "qapi/qapi-events-machine.h"
  10 #include "qapi/qapi-events-qdev.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
  35 static 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         }
  48     }
  49     return info;
  50 }
  51
  52 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  53 {
  54     ACPIOSTInfoList ***tail = list;
  55     int i;
  56
  57     for (i = 0; i < mem_st->dev_count; i++) {
  58         QAPI_LIST_APPEND(*tail,
  59                          acpi_memory_device_status(i, &mem_st->devs[i]));
  60     }
  61 }
  62
  63 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  64                                          unsigned int size)
  65 {
  66     uint32_t val = 0;
  67     MemHotplugState *mem_st = opaque;
  68     MemStatus *mdev;
  69     Object *o;
  70
  71     if (mem_st->selector >= mem_st->dev_count) {
  72         trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  73         return 0;
  74     }
  75
  76     mdev = &mem_st->devs[mem_st->selector];
  77     o = OBJECT(mdev->dimm);
  78     switch (addr) {
  79     case 0x0: /* Lo part of phys address where DIMM is mapped */
  80         val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  81         trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  82         break;
  83     case 0x4: /* Hi part of phys address where DIMM is mapped */
  84         val =
  85             o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  86         trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  87         break;
  88     case 0x8: /* Lo part of DIMM size */
  89         val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  90         trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  91         break;
  92     case 0xc: /* Hi part of DIMM size */
  93         val =
  94             o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
  95         trace_mhp_acpi_read_size_hi(mem_st->selector, val);
  96         break;
  97     case 0x10: /* node proximity for _PXM method */
  98         val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
  99         trace_mhp_acpi_read_pxm(mem_st->selector, val);
 100         break;
 101     case 0x14: /* pack and return is_* fields */
 102         val |= mdev->is_enabled   ? 1 : 0;
 103         val |= mdev->is_inserting ? 2 : 0;
 104         val |= mdev->is_removing  ? 4 : 0;
 105         trace_mhp_acpi_read_flags(mem_st->selector, val);
 106         break;
 107     default:
 108         val = ~0;
 109         break;
 110     }
 111     return val;
 112 }
 113
 114 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 115                                       unsigned int size)
 116 {
 117     MemHotplugState *mem_st = opaque;
 118     MemStatus *mdev;
 119     ACPIOSTInfo *info;
 120     DeviceState *dev = NULL;
 121     HotplugHandler *hotplug_ctrl = NULL;
 122     Error *local_err = NULL;
 123
 124     if (!mem_st->dev_count) {
 125         return;
 126     }
 127
 128     if (addr) {
 129         if (mem_st->selector >= mem_st->dev_count) {
 130             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 131             return;
 132         }
 133     }
 134
 135     switch (addr) {
 136     case 0x0: /* DIMM slot selector */
 137         mem_st->selector = data;
 138         trace_mhp_acpi_write_slot(mem_st->selector);
 139         break;
 140     case 0x4: /* _OST event  */
 141         mdev = &mem_st->devs[mem_st->selector];
 142         if (data == 1) {
 143             /* TODO: handle device insert OST event */
 144         } else if (data == 3) {
 145             /* TODO: handle device remove OST event */
 146         }
 147         mdev->ost_event = data;
 148         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 149         break;
 150     case 0x8: /* _OST status */
 151         mdev = &mem_st->devs[mem_st->selector];
 152         mdev->ost_status = data;
 153         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 154         /* TODO: implement memory removal on guest signal */
 155
 156         info = acpi_memory_device_status(mem_st->selector, mdev);
 157         qapi_event_send_acpi_device_ost(info);
 158         qapi_free_ACPIOSTInfo(info);
 159         break;
 160     case 0x14: /* set is_* fields  */
 161         mdev = &mem_st->devs[mem_st->selector];
 162         if (data & 2) { /* clear insert event */
 163             mdev->is_inserting  = false;
 164             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 165         } else if (data & 4) {
 166             mdev->is_removing = false;
 167             trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 168         } else if (data & 8) {
 169             if (!mdev->is_enabled) {
 170                 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 171                 break;
 172             }
 173
 174             dev = DEVICE(mdev->dimm);
 175             hotplug_ctrl = qdev_get_hotplug_handler(dev);
 176             /* call pc-dimm unplug cb */
 177             hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 178             if (local_err) {
 179                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 180
 181                 /*
 182                  * Send both MEM_UNPLUG_ERROR and DEVICE_UNPLUG_GUEST_ERROR
 183                  * while the deprecation of MEM_UNPLUG_ERROR is
 184                  * pending.
 185                  */
 186                 qapi_event_send_mem_unplug_error(dev->id ? : "",
 187                                                  error_get_pretty(local_err));
 188                 qapi_event_send_device_unplug_guest_error(dev->id,
 189                                                           dev->canonical_path);
 190                 error_free(local_err);
 191                 break;
 192             }
 193             object_unparent(OBJECT(dev));
 194             trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 195         }
 196         break;
 197     default:
 198         break;
 199     }
 200
 201 }
 202 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 203     .read = acpi_memory_hotplug_read,
 204     .write = acpi_memory_hotplug_write,
 205     .endianness = DEVICE_LITTLE_ENDIAN,
 206     .valid = {
 207         .min_access_size = 1,
 208         .max_access_size = 4,
 209     },
 210 };
 211
 212 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 213                               MemHotplugState *state, hwaddr io_base)
 214 {
 215     MachineState *machine = MACHINE(qdev_get_machine());
 216
 217     state->dev_count = machine->ram_slots;
 218     if (!state->dev_count) {
 219         return;
 220     }
 221
 222     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 223     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 224                           "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 225     memory_region_add_subregion(as, io_base, &state->io);
 226 }
 227
 228 /**
 229  * acpi_memory_slot_status:
 230  * @mem_st: memory hotplug state
 231  * @dev: device
 232  * @errp: set in case of an error
 233  *
 234  * Obtain a single memory slot status.
 235  *
 236  * This function will be called by memory unplug request cb and unplug cb.
 237  */
 238 static MemStatus *
 239 acpi_memory_slot_status(MemHotplugState *mem_st,
 240                         DeviceState *dev, Error **errp)
 241 {
 242     Error *local_err = NULL;
 243     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 244                                        &local_err);
 245
 246     if (local_err) {
 247         error_propagate(errp, local_err);
 248         return NULL;
 249     }
 250
 251     if (slot >= mem_st->dev_count) {
 252         char *dev_path = object_get_canonical_path(OBJECT(dev));
 253         error_setg(errp, "acpi_memory_slot_status: "
 254                    "device [%s] returned invalid memory slot[%d]",
 255                     dev_path, slot);
 256         g_free(dev_path);
 257         return NULL;
 258     }
 259
 260     return &mem_st->devs[slot];
 261 }
 262
 263 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 264                          DeviceState *dev, Error **errp)
 265 {
 266     MemStatus *mdev;
 267     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 268
 269     if (!dc->hotpluggable) {
 270         return;
 271     }
 272
 273     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 274     if (!mdev) {
 275         return;
 276     }
 277
 278     mdev->dimm = dev;
 279     mdev->is_enabled = true;
 280     if (dev->hotplugged) {
 281         mdev->is_inserting = true;
 282         acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 283     }
 284 }
 285
 286 void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 287                                    MemHotplugState *mem_st,
 288                                    DeviceState *dev, Error **errp)
 289 {
 290     MemStatus *mdev;
 291
 292     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 293     if (!mdev) {
 294         return;
 295     }
 296
 297     mdev->is_removing = true;
 298     acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 299 }
 300
 301 void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 302                            DeviceState *dev, Error **errp)
 303 {
 304     MemStatus *mdev;
 305
 306     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 307     if (!mdev) {
 308         return;
 309     }
 310
 311     mdev->is_enabled = false;
 312     mdev->dimm = NULL;
 313 }
 314
 315 static const VMStateDescription vmstate_memhp_sts = {
 316     .name = "memory hotplug device state",
 317     .version_id = 1,
 318     .minimum_version_id = 1,
 319     .fields      = (VMStateField[]) {
 320         VMSTATE_BOOL(is_enabled, MemStatus),
 321         VMSTATE_BOOL(is_inserting, MemStatus),
 322         VMSTATE_UINT32(ost_event, MemStatus),
 323         VMSTATE_UINT32(ost_status, MemStatus),
 324         VMSTATE_END_OF_LIST()
 325     }
 326 };
 327
 328 const VMStateDescription vmstate_memory_hotplug = {
 329     .name = "memory hotplug state",
 330     .version_id = 1,
 331     .minimum_version_id = 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
 340 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 341                               const char *res_root,
 342                               const char *event_handler_method,
 343                               AmlRegionSpace rs, hwaddr memhp_io_base)
 344 {
 345     int i;
 346     Aml *ifctx;
 347     Aml *method;
 348     Aml *dev_container;
 349     Aml *mem_ctrl_dev;
 350     char *mhp_res_path;
 351
 352     mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 353     mem_ctrl_dev = aml_device("%s", mhp_res_path);
 354     {
 355         Aml *crs;
 356
 357         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 358         aml_append(mem_ctrl_dev,
 359             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 360
 361         crs = aml_resource_template();
 362         if (rs == AML_SYSTEM_IO) {
 363             aml_append(crs,
 364                 aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 365                        MEMORY_HOTPLUG_IO_LEN)
 366             );
 367         } else {
 368             aml_append(crs, aml_memory32_fixed(memhp_io_base,
 369                             MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
 370         }
 371         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 372
 373         aml_append(mem_ctrl_dev, aml_operation_region(
 374             MEMORY_HOTPLUG_IO_REGION, rs,
 375             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 376         );
 377
 378     }
 379     aml_append(table, mem_ctrl_dev);
 380
 381     dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 382     {
 383         Aml *field;
 384         Aml *one = aml_int(1);
 385         Aml *zero = aml_int(0);
 386         Aml *ret_val = aml_local(0);
 387         Aml *slot_arg0 = aml_arg(0);
 388         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 389         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 390         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 391         char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 392                                           mhp_res_path);
 393
 394         aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 395         aml_append(dev_container,
 396             aml_name_decl("_UID", aml_string("DIMM devices")));
 397
 398         assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 399         aml_append(dev_container,
 400             aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 401         );
 402
 403         field = aml_field(mmio_path, AML_DWORD_ACC,
 404                           AML_NOLOCK, AML_PRESERVE);
 405         aml_append(field, /* read only */
 406             aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 407         aml_append(field, /* read only */
 408             aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 409         aml_append(field, /* read only */
 410             aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 411         aml_append(field, /* read only */
 412             aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 413         aml_append(field, /* read only */
 414             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 415         aml_append(dev_container, field);
 416
 417         field = aml_field(mmio_path, AML_BYTE_ACC,
 418                           AML_NOLOCK, AML_WRITE_AS_ZEROS);
 419         aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 420         aml_append(field, /* 1 if enabled, read only */
 421             aml_named_field(MEMORY_SLOT_ENABLED, 1));
 422         aml_append(field,
 423             /*(read) 1 if has a insert event. (write) 1 to clear event */
 424             aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 425         aml_append(field,
 426             /* (read) 1 if has a remove event. (write) 1 to clear event */
 427             aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 428         aml_append(field,
 429             /* initiates device eject, write only */
 430             aml_named_field(MEMORY_SLOT_EJECT, 1));
 431         aml_append(dev_container, field);
 432
 433         field = aml_field(mmio_path, AML_DWORD_ACC,
 434                           AML_NOLOCK, AML_PRESERVE);
 435         aml_append(field, /* DIMM selector, write only */
 436             aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 437         aml_append(field, /* _OST event code, write only */
 438             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 439         aml_append(field, /* _OST status code, write only */
 440             aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 441         aml_append(dev_container, field);
 442         g_free(mmio_path);
 443
 444         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 445         ifctx = aml_if(aml_equal(slots_nr, zero));
 446         {
 447             aml_append(ifctx, aml_return(zero));
 448         }
 449         aml_append(method, ifctx);
 450         /* present, functioning, decoding, not shown in UI */
 451         aml_append(method, aml_return(aml_int(0xB)));
 452         aml_append(dev_container, method);
 453
 454         aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 455
 456         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 457         {
 458             Aml *else_ctx;
 459             Aml *while_ctx;
 460             Aml *idx = aml_local(0);
 461             Aml *eject_req = aml_int(3);
 462             Aml *dev_chk = aml_int(1);
 463
 464             ifctx = aml_if(aml_equal(slots_nr, zero));
 465             {
 466                 aml_append(ifctx, aml_return(zero));
 467             }
 468             aml_append(method, ifctx);
 469
 470             aml_append(method, aml_store(zero, idx));
 471             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 472             /* build AML that:
 473              * loops over all slots and Notifies DIMMs with
 474              * Device Check or Eject Request notifications if
 475              * slot has corresponding status bit set and clears
 476              * slot status.
 477              */
 478             while_ctx = aml_while(aml_lless(idx, slots_nr));
 479             {
 480                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 481                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 482
 483                 aml_append(while_ctx, aml_store(idx, slot_selector));
 484                 ifctx = aml_if(aml_equal(ins_evt, one));
 485                 {
 486                     aml_append(ifctx,
 487                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 488                                          idx, dev_chk));
 489                     aml_append(ifctx, aml_store(one, ins_evt));
 490                 }
 491                 aml_append(while_ctx, ifctx);
 492
 493                 else_ctx = aml_else();
 494                 ifctx = aml_if(aml_equal(rm_evt, one));
 495                 {
 496                     aml_append(ifctx,
 497                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 498                                   idx, eject_req));
 499                     aml_append(ifctx, aml_store(one, rm_evt));
 500                 }
 501                 aml_append(else_ctx, ifctx);
 502                 aml_append(while_ctx, else_ctx);
 503
 504                 aml_append(while_ctx, aml_add(idx, one, idx));
 505             }
 506             aml_append(method, while_ctx);
 507             aml_append(method, aml_release(ctrl_lock));
 508             aml_append(method, aml_return(one));
 509         }
 510         aml_append(dev_container, method);
 511
 512         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 513         {
 514             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 515
 516             aml_append(method, aml_store(zero, ret_val));
 517             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 518             aml_append(method,
 519                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 520
 521             ifctx = aml_if(aml_equal(slot_enabled, one));
 522             {
 523                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 524             }
 525             aml_append(method, ifctx);
 526
 527             aml_append(method, aml_release(ctrl_lock));
 528             aml_append(method, aml_return(ret_val));
 529         }
 530         aml_append(dev_container, method);
 531
 532         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 533         {
 534             Aml *mr64 = aml_name("MR64");
 535             Aml *mr32 = aml_name("MR32");
 536             Aml *crs_tmpl = aml_resource_template();
 537             Aml *minl = aml_name("MINL");
 538             Aml *minh = aml_name("MINH");
 539             Aml *maxl =  aml_name("MAXL");
 540             Aml *maxh =  aml_name("MAXH");
 541             Aml *lenl = aml_name("LENL");
 542             Aml *lenh = aml_name("LENH");
 543
 544             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 545             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 546                                          slot_selector));
 547
 548             aml_append(crs_tmpl,
 549                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 550                                  AML_CACHEABLE, AML_READ_WRITE,
 551                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 552                                  0xFFFFFFFFFFFFFFFFULL));
 553             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 554             aml_append(method,
 555                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 556             aml_append(method,
 557                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 558             aml_append(method,
 559                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 560             aml_append(method,
 561                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 562             aml_append(method,
 563                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 564             aml_append(method,
 565                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 566
 567             aml_append(method,
 568                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 569             aml_append(method,
 570                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 571             aml_append(method,
 572                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 573             aml_append(method,
 574                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 575
 576             /* 64-bit math: MAX = MIN + LEN - 1 */
 577             aml_append(method, aml_add(minl, lenl, maxl));
 578             aml_append(method, aml_add(minh, lenh, maxh));
 579             ifctx = aml_if(aml_lless(maxl, minl));
 580             {
 581                 aml_append(ifctx, aml_add(maxh, one, maxh));
 582             }
 583             aml_append(method, ifctx);
 584             ifctx = aml_if(aml_lless(maxl, one));
 585             {
 586                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 587             }
 588             aml_append(method, ifctx);
 589             aml_append(method, aml_subtract(maxl, one, maxl));
 590
 591             /* return 32-bit _CRS if addr/size is in low mem */
 592             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 593             ifctx = aml_if(aml_equal(maxh, zero));
 594             {
 595                 crs_tmpl = aml_resource_template();
 596                 aml_append(crs_tmpl,
 597                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 598                                      AML_MAX_FIXED, AML_CACHEABLE,
 599                                      AML_READ_WRITE,
 600                                      0, 0x0, 0xFFFFFFFE, 0,
 601                                      0xFFFFFFFF));
 602                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 603                 aml_append(ifctx,
 604                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 605                 aml_append(ifctx,
 606                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 607                 aml_append(ifctx,
 608                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 609                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 610                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 611                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 612
 613                 aml_append(ifctx, aml_release(ctrl_lock));
 614                 aml_append(ifctx, aml_return(mr32));
 615             }
 616             aml_append(method, ifctx);
 617
 618             aml_append(method, aml_release(ctrl_lock));
 619             aml_append(method, aml_return(mr64));
 620         }
 621         aml_append(dev_container, method);
 622
 623         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 624                             AML_NOTSERIALIZED);
 625         {
 626             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 627
 628             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 629             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 630                                          slot_selector));
 631             aml_append(method, aml_store(proximity, ret_val));
 632             aml_append(method, aml_release(ctrl_lock));
 633             aml_append(method, aml_return(ret_val));
 634         }
 635         aml_append(dev_container, method);
 636
 637         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 638         {
 639             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 640             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 641
 642             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 643             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 644                                          slot_selector));
 645             aml_append(method, aml_store(aml_arg(1), ost_evt));
 646             aml_append(method, aml_store(aml_arg(2), ost_status));
 647             aml_append(method, aml_release(ctrl_lock));
 648         }
 649         aml_append(dev_container, method);
 650
 651         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 652         {
 653             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 654
 655             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 656             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 657                                          slot_selector));
 658             aml_append(method, aml_store(one, eject));
 659             aml_append(method, aml_release(ctrl_lock));
 660         }
 661         aml_append(dev_container, method);
 662
 663         /* build memory devices */
 664         for (i = 0; i < nr_mem; i++) {
 665             Aml *dev;
 666             const char *s;
 667
 668             dev = aml_device("MP%02X", i);
 669             aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 670             aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 671
 672             method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 673             s = MEMORY_SLOT_CRS_METHOD;
 674             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 675             aml_append(dev, method);
 676
 677             method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 678             s = MEMORY_SLOT_STATUS_METHOD;
 679             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 680             aml_append(dev, method);
 681
 682             method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 683             s = MEMORY_SLOT_PROXIMITY_METHOD;
 684             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 685             aml_append(dev, method);
 686
 687             method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 688             s = MEMORY_SLOT_OST_METHOD;
 689             aml_append(method,
 690                        aml_call4(s, aml_name("_UID"), aml_arg(0),
 691                                  aml_arg(1), aml_arg(2)));
 692             aml_append(dev, method);
 693
 694             method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 695             s = MEMORY_SLOT_EJECT_METHOD;
 696             aml_append(method,
 697                        aml_call2(s, aml_name("_UID"), aml_arg(0)));
 698             aml_append(dev, method);
 699
 700             aml_append(dev_container, dev);
 701         }
 702
 703         /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 704          *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 705          */
 706         method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 707         for (i = 0; i < nr_mem; i++) {
 708             ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 709             aml_append(ifctx,
 710                 aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 711             );
 712             aml_append(method, ifctx);
 713         }
 714         aml_append(dev_container, method);
 715     }
 716     aml_append(table, dev_container);
 717
 718     if (event_handler_method) {
 719         method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 720         aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
 721                                      MEMORY_SLOT_SCAN_METHOD));
 722         aml_append(table, method);
 723     }
 724
 725     g_free(mhp_res_path);
 726 }