hw/acpi/memory_hotplug.c

   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 #include "qapi/qapi-events-qdev.h"
  12
  13 #define MEMORY_SLOTS_NUMBER          "MDNR"
  14 #define MEMORY_HOTPLUG_IO_REGION     "HPMR"
  15 #define MEMORY_SLOT_ADDR_LOW         "MRBL"
  16 #define MEMORY_SLOT_ADDR_HIGH        "MRBH"
  17 #define MEMORY_SLOT_SIZE_LOW         "MRLL"
  18 #define MEMORY_SLOT_SIZE_HIGH        "MRLH"
  19 #define MEMORY_SLOT_PROXIMITY        "MPX"
  20 #define MEMORY_SLOT_ENABLED          "MES"
  21 #define MEMORY_SLOT_INSERT_EVENT     "MINS"
  22 #define MEMORY_SLOT_REMOVE_EVENT     "MRMV"
  23 #define MEMORY_SLOT_EJECT            "MEJ"
  24 #define MEMORY_SLOT_SLECTOR          "MSEL"
  25 #define MEMORY_SLOT_OST_EVENT        "MOEV"
  26 #define MEMORY_SLOT_OST_STATUS       "MOSC"
  27 #define MEMORY_SLOT_LOCK             "MLCK"
  28 #define MEMORY_SLOT_STATUS_METHOD    "MRST"
  29 #define MEMORY_SLOT_CRS_METHOD       "MCRS"
  30 #define MEMORY_SLOT_OST_METHOD       "MOST"
  31 #define MEMORY_SLOT_PROXIMITY_METHOD "MPXM"
  32 #define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
  33 #define MEMORY_SLOT_NOTIFY_METHOD    "MTFY"
  34 #define MEMORY_HOTPLUG_DEVICE        "MHPD"
  35
  36 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
  37 {
  38     ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
  39
  40     info->slot_type = ACPI_SLOT_TYPE_DIMM;
  41     info->slot = g_strdup_printf("%d", slot);
  42     info->source = mdev->ost_event;
  43     info->status = mdev->ost_status;
  44     if (mdev->dimm) {
  45         DeviceState *dev = DEVICE(mdev->dimm);
  46         if (dev->id) {
  47             info->device = g_strdup(dev->id);
  48             info->has_device = true;
  49         }
  50     }
  51     return info;
  52 }
  53
  54 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
  55 {
  56     ACPIOSTInfoList ***tail = list;
  57     int i;
  58
  59     for (i = 0; i < mem_st->dev_count; i++) {
  60         QAPI_LIST_APPEND(*tail,
  61                          acpi_memory_device_status(i, &mem_st->devs[i]));
  62     }
  63 }
  64
  65 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
  66                                          unsigned int size)
  67 {
  68     uint32_t val = 0;
  69     MemHotplugState *mem_st = opaque;
  70     MemStatus *mdev;
  71     Object *o;
  72
  73     if (mem_st->selector >= mem_st->dev_count) {
  74         trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
  75         return 0;
  76     }
  77
  78     mdev = &mem_st->devs[mem_st->selector];
  79     o = OBJECT(mdev->dimm);
  80     switch (addr) {
  81     case 0x0: /* Lo part of phys address where DIMM is mapped */
  82         val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
  83         trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
  84         break;
  85     case 0x4: /* Hi part of phys address where DIMM is mapped */
  86         val =
  87             o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
  88         trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
  89         break;
  90     case 0x8: /* Lo part of DIMM size */
  91         val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
  92         trace_mhp_acpi_read_size_lo(mem_st->selector, val);
  93         break;
  94     case 0xc: /* Hi part of DIMM size */
  95         val =
  96             o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
  97         trace_mhp_acpi_read_size_hi(mem_st->selector, val);
  98         break;
  99     case 0x10: /* node proximity for _PXM method */
 100         val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
 101         trace_mhp_acpi_read_pxm(mem_st->selector, val);
 102         break;
 103     case 0x14: /* pack and return is_* fields */
 104         val |= mdev->is_enabled   ? 1 : 0;
 105         val |= mdev->is_inserting ? 2 : 0;
 106         val |= mdev->is_removing  ? 4 : 0;
 107         trace_mhp_acpi_read_flags(mem_st->selector, val);
 108         break;
 109     default:
 110         val = ~0;
 111         break;
 112     }
 113     return val;
 114 }
 115
 116 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
 117                                       unsigned int size)
 118 {
 119     MemHotplugState *mem_st = opaque;
 120     MemStatus *mdev;
 121     ACPIOSTInfo *info;
 122     DeviceState *dev = NULL;
 123     HotplugHandler *hotplug_ctrl = NULL;
 124     Error *local_err = NULL;
 125
 126     if (!mem_st->dev_count) {
 127         return;
 128     }
 129
 130     if (addr) {
 131         if (mem_st->selector >= mem_st->dev_count) {
 132             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 133             return;
 134         }
 135     }
 136
 137     switch (addr) {
 138     case 0x0: /* DIMM slot selector */
 139         mem_st->selector = data;
 140         trace_mhp_acpi_write_slot(mem_st->selector);
 141         break;
 142     case 0x4: /* _OST event  */
 143         mdev = &mem_st->devs[mem_st->selector];
 144         if (data == 1) {
 145             /* TODO: handle device insert OST event */
 146         } else if (data == 3) {
 147             /* TODO: handle device remove OST event */
 148         }
 149         mdev->ost_event = data;
 150         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 151         break;
 152     case 0x8: /* _OST status */
 153         mdev = &mem_st->devs[mem_st->selector];
 154         mdev->ost_status = data;
 155         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 156         /* TODO: implement memory removal on guest signal */
 157
 158         info = acpi_memory_device_status(mem_st->selector, mdev);
 159         qapi_event_send_acpi_device_ost(info);
 160         qapi_free_ACPIOSTInfo(info);
 161         break;
 162     case 0x14: /* set is_* fields  */
 163         mdev = &mem_st->devs[mem_st->selector];
 164         if (data & 2) { /* clear insert event */
 165             mdev->is_inserting  = false;
 166             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 167         } else if (data & 4) {
 168             mdev->is_removing = false;
 169             trace_mhp_acpi_clear_remove_evt(mem_st->selector);
 170         } else if (data & 8) {
 171             if (!mdev->is_enabled) {
 172                 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
 173                 break;
 174             }
 175
 176             dev = DEVICE(mdev->dimm);
 177             hotplug_ctrl = qdev_get_hotplug_handler(dev);
 178             /* call pc-dimm unplug cb */
 179             hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 180             if (local_err) {
 181                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
 182
 183                 /*
 184                  * Send both MEM_UNPLUG_ERROR and DEVICE_UNPLUG_GUEST_ERROR
 185                  * while the deprecation of MEM_UNPLUG_ERROR is
 186                  * pending.
 187                  */
 188                 qapi_event_send_mem_unplug_error(dev->id ? : "",
 189                                                  error_get_pretty(local_err));
 190                 qapi_event_send_device_unplug_guest_error(!!dev->id, dev->id,
 191                                                           dev->canonical_path);
 192                 error_free(local_err);
 193                 break;
 194             }
 195             object_unparent(OBJECT(dev));
 196             trace_mhp_acpi_pc_dimm_deleted(mem_st->selector);
 197         }
 198         break;
 199     default:
 200         break;
 201     }
 202
 203 }
 204 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 205     .read = acpi_memory_hotplug_read,
 206     .write = acpi_memory_hotplug_write,
 207     .endianness = DEVICE_LITTLE_ENDIAN,
 208     .valid = {
 209         .min_access_size = 1,
 210         .max_access_size = 4,
 211     },
 212 };
 213
 214 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 215                               MemHotplugState *state, hwaddr io_base)
 216 {
 217     MachineState *machine = MACHINE(qdev_get_machine());
 218
 219     state->dev_count = machine->ram_slots;
 220     if (!state->dev_count) {
 221         return;
 222     }
 223
 224     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 225     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 226                           "acpi-mem-hotplug", MEMORY_HOTPLUG_IO_LEN);
 227     memory_region_add_subregion(as, io_base, &state->io);
 228 }
 229
 230 /**
 231  * acpi_memory_slot_status:
 232  * @mem_st: memory hotplug state
 233  * @dev: device
 234  * @errp: set in case of an error
 235  *
 236  * Obtain a single memory slot status.
 237  *
 238  * This function will be called by memory unplug request cb and unplug cb.
 239  */
 240 static MemStatus *
 241 acpi_memory_slot_status(MemHotplugState *mem_st,
 242                         DeviceState *dev, Error **errp)
 243 {
 244     Error *local_err = NULL;
 245     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 246                                        &local_err);
 247
 248     if (local_err) {
 249         error_propagate(errp, local_err);
 250         return NULL;
 251     }
 252
 253     if (slot >= mem_st->dev_count) {
 254         char *dev_path = object_get_canonical_path(OBJECT(dev));
 255         error_setg(errp, "acpi_memory_slot_status: "
 256                    "device [%s] returned invalid memory slot[%d]",
 257                     dev_path, slot);
 258         g_free(dev_path);
 259         return NULL;
 260     }
 261
 262     return &mem_st->devs[slot];
 263 }
 264
 265 void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
 266                          DeviceState *dev, Error **errp)
 267 {
 268     MemStatus *mdev;
 269     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 270
 271     if (!dc->hotpluggable) {
 272         return;
 273     }
 274
 275     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 276     if (!mdev) {
 277         return;
 278     }
 279
 280     mdev->dimm = dev;
 281     mdev->is_enabled = true;
 282     if (dev->hotplugged) {
 283         mdev->is_inserting = true;
 284         acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 285     }
 286 }
 287
 288 void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
 289                                    MemHotplugState *mem_st,
 290                                    DeviceState *dev, Error **errp)
 291 {
 292     MemStatus *mdev;
 293
 294     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 295     if (!mdev) {
 296         return;
 297     }
 298
 299     mdev->is_removing = true;
 300     acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
 301 }
 302
 303 void acpi_memory_unplug_cb(MemHotplugState *mem_st,
 304                            DeviceState *dev, Error **errp)
 305 {
 306     MemStatus *mdev;
 307
 308     mdev = acpi_memory_slot_status(mem_st, dev, errp);
 309     if (!mdev) {
 310         return;
 311     }
 312
 313     mdev->is_enabled = false;
 314     mdev->dimm = NULL;
 315 }
 316
 317 static const VMStateDescription vmstate_memhp_sts = {
 318     .name = "memory hotplug device state",
 319     .version_id = 1,
 320     .minimum_version_id = 1,
 321     .minimum_version_id_old = 1,
 322     .fields      = (VMStateField[]) {
 323         VMSTATE_BOOL(is_enabled, MemStatus),
 324         VMSTATE_BOOL(is_inserting, MemStatus),
 325         VMSTATE_UINT32(ost_event, MemStatus),
 326         VMSTATE_UINT32(ost_status, MemStatus),
 327         VMSTATE_END_OF_LIST()
 328     }
 329 };
 330
 331 const VMStateDescription vmstate_memory_hotplug = {
 332     .name = "memory hotplug state",
 333     .version_id = 1,
 334     .minimum_version_id = 1,
 335     .minimum_version_id_old = 1,
 336     .fields      = (VMStateField[]) {
 337         VMSTATE_UINT32(selector, MemHotplugState),
 338         VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 339                                              vmstate_memhp_sts, MemStatus),
 340         VMSTATE_END_OF_LIST()
 341     }
 342 };
 343
 344 void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
 345                               const char *res_root,
 346                               const char *event_handler_method,
 347                               AmlRegionSpace rs, hwaddr memhp_io_base)
 348 {
 349     int i;
 350     Aml *ifctx;
 351     Aml *method;
 352     Aml *dev_container;
 353     Aml *mem_ctrl_dev;
 354     char *mhp_res_path;
 355
 356     mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
 357     mem_ctrl_dev = aml_device("%s", mhp_res_path);
 358     {
 359         Aml *crs;
 360
 361         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
 362         aml_append(mem_ctrl_dev,
 363             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
 364
 365         crs = aml_resource_template();
 366         if (rs == AML_SYSTEM_IO) {
 367             aml_append(crs,
 368                 aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
 369                        MEMORY_HOTPLUG_IO_LEN)
 370             );
 371         } else {
 372             aml_append(crs, aml_memory32_fixed(memhp_io_base,
 373                             MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
 374         }
 375         aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
 376
 377         aml_append(mem_ctrl_dev, aml_operation_region(
 378             MEMORY_HOTPLUG_IO_REGION, rs,
 379             aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
 380         );
 381
 382     }
 383     aml_append(table, mem_ctrl_dev);
 384
 385     dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
 386     {
 387         Aml *field;
 388         Aml *one = aml_int(1);
 389         Aml *zero = aml_int(0);
 390         Aml *ret_val = aml_local(0);
 391         Aml *slot_arg0 = aml_arg(0);
 392         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
 393         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
 394         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 395         char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
 396                                           mhp_res_path);
 397
 398         aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
 399         aml_append(dev_container,
 400             aml_name_decl("_UID", aml_string("DIMM devices")));
 401
 402         assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
 403         aml_append(dev_container,
 404             aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
 405         );
 406
 407         field = aml_field(mmio_path, AML_DWORD_ACC,
 408                           AML_NOLOCK, AML_PRESERVE);
 409         aml_append(field, /* read only */
 410             aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
 411         aml_append(field, /* read only */
 412             aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
 413         aml_append(field, /* read only */
 414             aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
 415         aml_append(field, /* read only */
 416             aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
 417         aml_append(field, /* read only */
 418             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
 419         aml_append(dev_container, field);
 420
 421         field = aml_field(mmio_path, AML_BYTE_ACC,
 422                           AML_NOLOCK, AML_WRITE_AS_ZEROS);
 423         aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
 424         aml_append(field, /* 1 if enabled, read only */
 425             aml_named_field(MEMORY_SLOT_ENABLED, 1));
 426         aml_append(field,
 427             /*(read) 1 if has a insert event. (write) 1 to clear event */
 428             aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
 429         aml_append(field,
 430             /* (read) 1 if has a remove event. (write) 1 to clear event */
 431             aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
 432         aml_append(field,
 433             /* initiates device eject, write only */
 434             aml_named_field(MEMORY_SLOT_EJECT, 1));
 435         aml_append(dev_container, field);
 436
 437         field = aml_field(mmio_path, AML_DWORD_ACC,
 438                           AML_NOLOCK, AML_PRESERVE);
 439         aml_append(field, /* DIMM selector, write only */
 440             aml_named_field(MEMORY_SLOT_SLECTOR, 32));
 441         aml_append(field, /* _OST event code, write only */
 442             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
 443         aml_append(field, /* _OST status code, write only */
 444             aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
 445         aml_append(dev_container, field);
 446         g_free(mmio_path);
 447
 448         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 449         ifctx = aml_if(aml_equal(slots_nr, zero));
 450         {
 451             aml_append(ifctx, aml_return(zero));
 452         }
 453         aml_append(method, ifctx);
 454         /* present, functioning, decoding, not shown in UI */
 455         aml_append(method, aml_return(aml_int(0xB)));
 456         aml_append(dev_container, method);
 457
 458         aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
 459
 460         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
 461         {
 462             Aml *else_ctx;
 463             Aml *while_ctx;
 464             Aml *idx = aml_local(0);
 465             Aml *eject_req = aml_int(3);
 466             Aml *dev_chk = aml_int(1);
 467
 468             ifctx = aml_if(aml_equal(slots_nr, zero));
 469             {
 470                 aml_append(ifctx, aml_return(zero));
 471             }
 472             aml_append(method, ifctx);
 473
 474             aml_append(method, aml_store(zero, idx));
 475             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 476             /* build AML that:
 477              * loops over all slots and Notifies DIMMs with
 478              * Device Check or Eject Request notifications if
 479              * slot has corresponding status bit set and clears
 480              * slot status.
 481              */
 482             while_ctx = aml_while(aml_lless(idx, slots_nr));
 483             {
 484                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
 485                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
 486
 487                 aml_append(while_ctx, aml_store(idx, slot_selector));
 488                 ifctx = aml_if(aml_equal(ins_evt, one));
 489                 {
 490                     aml_append(ifctx,
 491                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 492                                          idx, dev_chk));
 493                     aml_append(ifctx, aml_store(one, ins_evt));
 494                 }
 495                 aml_append(while_ctx, ifctx);
 496
 497                 else_ctx = aml_else();
 498                 ifctx = aml_if(aml_equal(rm_evt, one));
 499                 {
 500                     aml_append(ifctx,
 501                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
 502                                   idx, eject_req));
 503                     aml_append(ifctx, aml_store(one, rm_evt));
 504                 }
 505                 aml_append(else_ctx, ifctx);
 506                 aml_append(while_ctx, else_ctx);
 507
 508                 aml_append(while_ctx, aml_add(idx, one, idx));
 509             }
 510             aml_append(method, while_ctx);
 511             aml_append(method, aml_release(ctrl_lock));
 512             aml_append(method, aml_return(one));
 513         }
 514         aml_append(dev_container, method);
 515
 516         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 517         {
 518             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 519
 520             aml_append(method, aml_store(zero, ret_val));
 521             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 522             aml_append(method,
 523                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 524
 525             ifctx = aml_if(aml_equal(slot_enabled, one));
 526             {
 527                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 528             }
 529             aml_append(method, ifctx);
 530
 531             aml_append(method, aml_release(ctrl_lock));
 532             aml_append(method, aml_return(ret_val));
 533         }
 534         aml_append(dev_container, method);
 535
 536         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 537         {
 538             Aml *mr64 = aml_name("MR64");
 539             Aml *mr32 = aml_name("MR32");
 540             Aml *crs_tmpl = aml_resource_template();
 541             Aml *minl = aml_name("MINL");
 542             Aml *minh = aml_name("MINH");
 543             Aml *maxl =  aml_name("MAXL");
 544             Aml *maxh =  aml_name("MAXH");
 545             Aml *lenl = aml_name("LENL");
 546             Aml *lenh = aml_name("LENH");
 547
 548             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 549             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 550                                          slot_selector));
 551
 552             aml_append(crs_tmpl,
 553                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 554                                  AML_CACHEABLE, AML_READ_WRITE,
 555                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 556                                  0xFFFFFFFFFFFFFFFFULL));
 557             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 558             aml_append(method,
 559                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 560             aml_append(method,
 561                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 562             aml_append(method,
 563                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 564             aml_append(method,
 565                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 566             aml_append(method,
 567                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 568             aml_append(method,
 569                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 570
 571             aml_append(method,
 572                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 573             aml_append(method,
 574                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 575             aml_append(method,
 576                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 577             aml_append(method,
 578                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 579
 580             /* 64-bit math: MAX = MIN + LEN - 1 */
 581             aml_append(method, aml_add(minl, lenl, maxl));
 582             aml_append(method, aml_add(minh, lenh, maxh));
 583             ifctx = aml_if(aml_lless(maxl, minl));
 584             {
 585                 aml_append(ifctx, aml_add(maxh, one, maxh));
 586             }
 587             aml_append(method, ifctx);
 588             ifctx = aml_if(aml_lless(maxl, one));
 589             {
 590                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 591             }
 592             aml_append(method, ifctx);
 593             aml_append(method, aml_subtract(maxl, one, maxl));
 594
 595             /* return 32-bit _CRS if addr/size is in low mem */
 596             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 597             ifctx = aml_if(aml_equal(maxh, zero));
 598             {
 599                 crs_tmpl = aml_resource_template();
 600                 aml_append(crs_tmpl,
 601                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 602                                      AML_MAX_FIXED, AML_CACHEABLE,
 603                                      AML_READ_WRITE,
 604                                      0, 0x0, 0xFFFFFFFE, 0,
 605                                      0xFFFFFFFF));
 606                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 607                 aml_append(ifctx,
 608                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 609                 aml_append(ifctx,
 610                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 611                 aml_append(ifctx,
 612                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 613                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 614                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 615                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 616
 617                 aml_append(ifctx, aml_release(ctrl_lock));
 618                 aml_append(ifctx, aml_return(mr32));
 619             }
 620             aml_append(method, ifctx);
 621
 622             aml_append(method, aml_release(ctrl_lock));
 623             aml_append(method, aml_return(mr64));
 624         }
 625         aml_append(dev_container, method);
 626
 627         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 628                             AML_NOTSERIALIZED);
 629         {
 630             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 631
 632             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 633             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 634                                          slot_selector));
 635             aml_append(method, aml_store(proximity, ret_val));
 636             aml_append(method, aml_release(ctrl_lock));
 637             aml_append(method, aml_return(ret_val));
 638         }
 639         aml_append(dev_container, method);
 640
 641         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 642         {
 643             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 644             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 645
 646             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 647             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 648                                          slot_selector));
 649             aml_append(method, aml_store(aml_arg(1), ost_evt));
 650             aml_append(method, aml_store(aml_arg(2), ost_status));
 651             aml_append(method, aml_release(ctrl_lock));
 652         }
 653         aml_append(dev_container, method);
 654
 655         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 656         {
 657             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 658
 659             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 660             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 661                                          slot_selector));
 662             aml_append(method, aml_store(one, eject));
 663             aml_append(method, aml_release(ctrl_lock));
 664         }
 665         aml_append(dev_container, method);
 666
 667         /* build memory devices */
 668         for (i = 0; i < nr_mem; i++) {
 669             Aml *dev;
 670             const char *s;
 671
 672             dev = aml_device("MP%02X", i);
 673             aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
 674             aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 675
 676             method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
 677             s = MEMORY_SLOT_CRS_METHOD;
 678             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 679             aml_append(dev, method);
 680
 681             method = aml_method("_STA", 0, AML_NOTSERIALIZED);
 682             s = MEMORY_SLOT_STATUS_METHOD;
 683             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 684             aml_append(dev, method);
 685
 686             method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
 687             s = MEMORY_SLOT_PROXIMITY_METHOD;
 688             aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
 689             aml_append(dev, method);
 690
 691             method = aml_method("_OST", 3, AML_NOTSERIALIZED);
 692             s = MEMORY_SLOT_OST_METHOD;
 693             aml_append(method,
 694                        aml_call4(s, aml_name("_UID"), aml_arg(0),
 695                                  aml_arg(1), aml_arg(2)));
 696             aml_append(dev, method);
 697
 698             method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
 699             s = MEMORY_SLOT_EJECT_METHOD;
 700             aml_append(method,
 701                        aml_call2(s, aml_name("_UID"), aml_arg(0)));
 702             aml_append(dev, method);
 703
 704             aml_append(dev_container, dev);
 705         }
 706
 707         /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
 708          *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
 709          */
 710         method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
 711         for (i = 0; i < nr_mem; i++) {
 712             ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
 713             aml_append(ifctx,
 714                 aml_notify(aml_name("MP%.02X", i), aml_arg(1))
 715             );
 716             aml_append(method, ifctx);
 717         }
 718         aml_append(dev_container, method);
 719     }
 720     aml_append(table, dev_container);
 721
 722     if (event_handler_method) {
 723         method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
 724         aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
 725                                      MEMORY_SLOT_SCAN_METHOD));
 726         aml_append(table, method);
 727     }
 728
 729     g_free(mhp_res_path);
 730 }