qemu

1
#include "qemu/osdep.h"
2
#include "hw/acpi/memory_hotplug.h"
3
#include "hw/mem/pc-dimm.h"
4
#include "hw/boards.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
        }
49
    }
50
    return info;
51
}
52

53
void 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

64
static 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) {
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        trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
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        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 */
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        val = o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) : 0;
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        trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
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        break;
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    case 0x4: /* Hi part of phys address where DIMM is mapped */
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        val =
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            o ? object_property_get_uint(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
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        trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
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        break;
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    case 0x8: /* Lo part of DIMM size */
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        val = o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) : 0;
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        trace_mhp_acpi_read_size_lo(mem_st->selector, val);
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        break;
93
    case 0xc: /* Hi part of DIMM size */
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        val =
95
            o ? object_property_get_uint(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
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        trace_mhp_acpi_read_size_hi(mem_st->selector, val);
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        break;
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    case 0x10: /* node proximity for _PXM method */
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        val = o ? object_property_get_uint(o, PC_DIMM_NODE_PROP, NULL) : 0;
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        trace_mhp_acpi_read_pxm(mem_st->selector, val);
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        break;
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    case 0x14: /* pack and return is_* fields */
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        val |= mdev->is_enabled   ? 1 : 0;
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        val |= mdev->is_inserting ? 2 : 0;
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        val |= mdev->is_removing  ? 4 : 0;
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        trace_mhp_acpi_read_flags(mem_st->selector, val);
107
        break;
108
    default:
109
        val = ~0;
110
        break;
111
    }
112
    return val;
113
}
114

115
static 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 */
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        mem_st->selector = data;
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        trace_mhp_acpi_write_slot(mem_st->selector);
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        break;
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    case 0x4: /* _OST event  */
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        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];
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        mdev->ost_status = data;
154
        trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
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        /* TODO: implement memory removal on guest signal */
156

157
        info = acpi_memory_device_status(mem_st->selector, mdev);
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        qapi_event_send_acpi_device_ost(info);
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        qapi_free_ACPIOSTInfo(info);
160
        break;
161
    case 0x14: /* set is_* fields  */
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        mdev = &mem_st->devs[mem_st->selector];
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        if (data & 2) { /* clear insert event */
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            mdev->is_inserting  = false;
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            trace_mhp_acpi_clear_insert_evt(mem_st->selector);
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        } else if (data & 4) {
167
            mdev->is_removing = false;
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            trace_mhp_acpi_clear_remove_evt(mem_st->selector);
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        } else if (data & 8) {
170
            if (!mdev->is_enabled) {
171
                trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector);
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                break;
173
            }
174

175
            dev = DEVICE(mdev->dimm);
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            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);
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                qapi_event_send_device_unplug_guest_error(dev->id,
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                                                          dev->canonical_path);
183
                error_free(local_err);
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                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
}
195
static const MemoryRegionOps acpi_memory_hotplug_ops = {
196
    .read = acpi_memory_hotplug_read,
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    .write = acpi_memory_hotplug_write,
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    .endianness = DEVICE_LITTLE_ENDIAN,
199
    .valid = {
200
        .min_access_size = 1,
201
        .max_access_size = 4,
202
    },
203
};
204

205
void 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,
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                          "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
 *
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 * Obtain a single memory slot status.
228
 *
229
 * This function will be called by memory unplug request cb and unplug cb.
230
 */
231
static MemStatus *
232
acpi_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

256
void 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

279
void 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

294
void 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

308
static const VMStateDescription vmstate_memhp_sts = {
309
    .name = "memory hotplug device state",
310
    .version_id = 1,
311
    .minimum_version_id = 1,
312
    .fields = (const VMStateField[]) {
313
        VMSTATE_BOOL(is_enabled, MemStatus),
314
        VMSTATE_BOOL(is_inserting, MemStatus),
315
        VMSTATE_UINT32(ost_event, MemStatus),
316
        VMSTATE_UINT32(ost_status, MemStatus),
317
        VMSTATE_END_OF_LIST()
318
    }
319
};
320

321
const VMStateDescription vmstate_memory_hotplug = {
322
    .name = "memory hotplug state",
323
    .version_id = 1,
324
    .minimum_version_id = 1,
325
    .fields = (const VMStateField[]) {
326
        VMSTATE_UINT32(selector, MemHotplugState),
327
        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
328
                                             vmstate_memhp_sts, MemStatus),
329
        VMSTATE_END_OF_LIST()
330
    }
331
};
332

333
void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
334
                              const char *res_root,
335
                              const char *event_handler_method,
336
                              AmlRegionSpace rs, hwaddr memhp_io_base)
337
{
338
    int i;
339
    Aml *ifctx;
340
    Aml *method;
341
    Aml *dev_container;
342
    Aml *mem_ctrl_dev;
343
    char *mhp_res_path;
344

345
    mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
346
    mem_ctrl_dev = aml_device("%s", mhp_res_path);
347
    {
348
        Aml *crs;
349

350
        aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
351
        aml_append(mem_ctrl_dev,
352
            aml_name_decl("_UID", aml_string("Memory hotplug resources")));
353

354
        crs = aml_resource_template();
355
        if (rs == AML_SYSTEM_IO) {
356
            aml_append(crs,
357
                aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
358
                       MEMORY_HOTPLUG_IO_LEN)
359
            );
360
        } else {
361
            aml_append(crs, aml_memory32_fixed(memhp_io_base,
362
                            MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
363
        }
364
        aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
365

366
        aml_append(mem_ctrl_dev, aml_operation_region(
367
            MEMORY_HOTPLUG_IO_REGION, rs,
368
            aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
369
        );
370

371
    }
372
    aml_append(table, mem_ctrl_dev);
373

374
    dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
375
    {
376
        Aml *field;
377
        Aml *one = aml_int(1);
378
        Aml *zero = aml_int(0);
379
        Aml *ret_val = aml_local(0);
380
        Aml *slot_arg0 = aml_arg(0);
381
        Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
382
        Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
383
        Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
384
        char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
385
                                          mhp_res_path);
386

387
        aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
388
        aml_append(dev_container,
389
            aml_name_decl("_UID", aml_string("DIMM devices")));
390

391
        assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
392
        aml_append(dev_container,
393
            aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
394
        );
395

396
        field = aml_field(mmio_path, AML_DWORD_ACC,
397
                          AML_NOLOCK, AML_PRESERVE);
398
        aml_append(field, /* read only */
399
            aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
400
        aml_append(field, /* read only */
401
            aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
402
        aml_append(field, /* read only */
403
            aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
404
        aml_append(field, /* read only */
405
            aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
406
        aml_append(field, /* read only */
407
            aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
408
        aml_append(dev_container, field);
409

410
        field = aml_field(mmio_path, AML_BYTE_ACC,
411
                          AML_NOLOCK, AML_WRITE_AS_ZEROS);
412
        aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
413
        aml_append(field, /* 1 if enabled, read only */
414
            aml_named_field(MEMORY_SLOT_ENABLED, 1));
415
        aml_append(field,
416
            /*(read) 1 if has a insert event. (write) 1 to clear event */
417
            aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
418
        aml_append(field,
419
            /* (read) 1 if has a remove event. (write) 1 to clear event */
420
            aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
421
        aml_append(field,
422
            /* initiates device eject, write only */
423
            aml_named_field(MEMORY_SLOT_EJECT, 1));
424
        aml_append(dev_container, field);
425

426
        field = aml_field(mmio_path, AML_DWORD_ACC,
427
                          AML_NOLOCK, AML_PRESERVE);
428
        aml_append(field, /* DIMM selector, write only */
429
            aml_named_field(MEMORY_SLOT_SLECTOR, 32));
430
        aml_append(field, /* _OST event code, write only */
431
            aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
432
        aml_append(field, /* _OST status code, write only */
433
            aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
434
        aml_append(dev_container, field);
435
        g_free(mmio_path);
436

437
        method = aml_method("_STA", 0, AML_NOTSERIALIZED);
438
        ifctx = aml_if(aml_equal(slots_nr, zero));
439
        {
440
            aml_append(ifctx, aml_return(zero));
441
        }
442
        aml_append(method, ifctx);
443
        /* present, functioning, decoding, not shown in UI */
444
        aml_append(method, aml_return(aml_int(0xB)));
445
        aml_append(dev_container, method);
446

447
        aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
448

449
        method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
450
        {
451
            Aml *else_ctx;
452
            Aml *while_ctx;
453
            Aml *idx = aml_local(0);
454
            Aml *eject_req = aml_int(3);
455
            Aml *dev_chk = aml_int(1);
456

457
            ifctx = aml_if(aml_equal(slots_nr, zero));
458
            {
459
                aml_append(ifctx, aml_return(zero));
460
            }
461
            aml_append(method, ifctx);
462

463
            aml_append(method, aml_store(zero, idx));
464
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
465
            /* build AML that:
466
             * loops over all slots and Notifies DIMMs with
467
             * Device Check or Eject Request notifications if
468
             * slot has corresponding status bit set and clears
469
             * slot status.
470
             */
471
            while_ctx = aml_while(aml_lless(idx, slots_nr));
472
            {
473
                Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
474
                Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
475

476
                aml_append(while_ctx, aml_store(idx, slot_selector));
477
                ifctx = aml_if(aml_equal(ins_evt, one));
478
                {
479
                    aml_append(ifctx,
480
                               aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
481
                                         idx, dev_chk));
482
                    aml_append(ifctx, aml_store(one, ins_evt));
483
                }
484
                aml_append(while_ctx, ifctx);
485

486
                else_ctx = aml_else();
487
                ifctx = aml_if(aml_equal(rm_evt, one));
488
                {
489
                    aml_append(ifctx,
490
                        aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
491
                                  idx, eject_req));
492
                    aml_append(ifctx, aml_store(one, rm_evt));
493
                }
494
                aml_append(else_ctx, ifctx);
495
                aml_append(while_ctx, else_ctx);
496

497
                aml_append(while_ctx, aml_add(idx, one, idx));
498
            }
499
            aml_append(method, while_ctx);
500
            aml_append(method, aml_release(ctrl_lock));
501
            aml_append(method, aml_return(one));
502
        }
503
        aml_append(dev_container, method);
504

505
        method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
506
        {
507
            Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
508

509
            aml_append(method, aml_store(zero, ret_val));
510
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
511
            aml_append(method,
512
                aml_store(aml_to_integer(slot_arg0), slot_selector));
513

514
            ifctx = aml_if(aml_equal(slot_enabled, one));
515
            {
516
                aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
517
            }
518
            aml_append(method, ifctx);
519

520
            aml_append(method, aml_release(ctrl_lock));
521
            aml_append(method, aml_return(ret_val));
522
        }
523
        aml_append(dev_container, method);
524

525
        method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
526
        {
527
            Aml *mr64 = aml_name("MR64");
528
            Aml *mr32 = aml_name("MR32");
529
            Aml *crs_tmpl = aml_resource_template();
530
            Aml *minl = aml_name("MINL");
531
            Aml *minh = aml_name("MINH");
532
            Aml *maxl =  aml_name("MAXL");
533
            Aml *maxh =  aml_name("MAXH");
534
            Aml *lenl = aml_name("LENL");
535
            Aml *lenh = aml_name("LENH");
536

537
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
538
            aml_append(method, aml_store(aml_to_integer(slot_arg0),
539
                                         slot_selector));
540

541
            aml_append(crs_tmpl,
542
                aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
543
                                 AML_CACHEABLE, AML_READ_WRITE,
544
                                 0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
545
                                 0xFFFFFFFFFFFFFFFFULL));
546
            aml_append(method, aml_name_decl("MR64", crs_tmpl));
547
            aml_append(method,
548
                aml_create_dword_field(mr64, aml_int(14), "MINL"));
549
            aml_append(method,
550
                aml_create_dword_field(mr64, aml_int(18), "MINH"));
551
            aml_append(method,
552
                aml_create_dword_field(mr64, aml_int(38), "LENL"));
553
            aml_append(method,
554
                aml_create_dword_field(mr64, aml_int(42), "LENH"));
555
            aml_append(method,
556
                aml_create_dword_field(mr64, aml_int(22), "MAXL"));
557
            aml_append(method,
558
                aml_create_dword_field(mr64, aml_int(26), "MAXH"));
559

560
            aml_append(method,
561
                aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
562
            aml_append(method,
563
                aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
564
            aml_append(method,
565
                aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
566
            aml_append(method,
567
                aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
568

569
            /* 64-bit math: MAX = MIN + LEN - 1 */
570
            aml_append(method, aml_add(minl, lenl, maxl));
571
            aml_append(method, aml_add(minh, lenh, maxh));
572
            ifctx = aml_if(aml_lless(maxl, minl));
573
            {
574
                aml_append(ifctx, aml_add(maxh, one, maxh));
575
            }
576
            aml_append(method, ifctx);
577
            ifctx = aml_if(aml_lless(maxl, one));
578
            {
579
                aml_append(ifctx, aml_subtract(maxh, one, maxh));
580
            }
581
            aml_append(method, ifctx);
582
            aml_append(method, aml_subtract(maxl, one, maxl));
583

584
            /* return 32-bit _CRS if addr/size is in low mem */
585
            /* TODO: remove it since all hotplugged DIMMs are in high mem */
586
            ifctx = aml_if(aml_equal(maxh, zero));
587
            {
588
                crs_tmpl = aml_resource_template();
589
                aml_append(crs_tmpl,
590
                    aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
591
                                     AML_MAX_FIXED, AML_CACHEABLE,
592
                                     AML_READ_WRITE,
593
                                     0, 0x0, 0xFFFFFFFE, 0,
594
                                     0xFFFFFFFF));
595
                aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
596
                aml_append(ifctx,
597
                    aml_create_dword_field(mr32, aml_int(10), "MIN"));
598
                aml_append(ifctx,
599
                    aml_create_dword_field(mr32, aml_int(14), "MAX"));
600
                aml_append(ifctx,
601
                    aml_create_dword_field(mr32, aml_int(22), "LEN"));
602
                aml_append(ifctx, aml_store(minl, aml_name("MIN")));
603
                aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
604
                aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
605

606
                aml_append(ifctx, aml_release(ctrl_lock));
607
                aml_append(ifctx, aml_return(mr32));
608
            }
609
            aml_append(method, ifctx);
610

611
            aml_append(method, aml_release(ctrl_lock));
612
            aml_append(method, aml_return(mr64));
613
        }
614
        aml_append(dev_container, method);
615

616
        method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
617
                            AML_NOTSERIALIZED);
618
        {
619
            Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
620

621
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
622
            aml_append(method, aml_store(aml_to_integer(slot_arg0),
623
                                         slot_selector));
624
            aml_append(method, aml_store(proximity, ret_val));
625
            aml_append(method, aml_release(ctrl_lock));
626
            aml_append(method, aml_return(ret_val));
627
        }
628
        aml_append(dev_container, method);
629

630
        method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
631
        {
632
            Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
633
            Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
634

635
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
636
            aml_append(method, aml_store(aml_to_integer(slot_arg0),
637
                                         slot_selector));
638
            aml_append(method, aml_store(aml_arg(1), ost_evt));
639
            aml_append(method, aml_store(aml_arg(2), ost_status));
640
            aml_append(method, aml_release(ctrl_lock));
641
        }
642
        aml_append(dev_container, method);
643

644
        method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
645
        {
646
            Aml *eject = aml_name(MEMORY_SLOT_EJECT);
647

648
            aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
649
            aml_append(method, aml_store(aml_to_integer(slot_arg0),
650
                                         slot_selector));
651
            aml_append(method, aml_store(one, eject));
652
            aml_append(method, aml_release(ctrl_lock));
653
        }
654
        aml_append(dev_container, method);
655

656
        /* build memory devices */
657
        for (i = 0; i < nr_mem; i++) {
658
            Aml *dev;
659
            const char *s;
660

661
            dev = aml_device("MP%02X", i);
662
            aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
663
            aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
664

665
            method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
666
            s = MEMORY_SLOT_CRS_METHOD;
667
            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
668
            aml_append(dev, method);
669

670
            method = aml_method("_STA", 0, AML_NOTSERIALIZED);
671
            s = MEMORY_SLOT_STATUS_METHOD;
672
            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
673
            aml_append(dev, method);
674

675
            method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
676
            s = MEMORY_SLOT_PROXIMITY_METHOD;
677
            aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
678
            aml_append(dev, method);
679

680
            method = aml_method("_OST", 3, AML_NOTSERIALIZED);
681
            s = MEMORY_SLOT_OST_METHOD;
682
            aml_append(method,
683
                       aml_call4(s, aml_name("_UID"), aml_arg(0),
684
                                 aml_arg(1), aml_arg(2)));
685
            aml_append(dev, method);
686

687
            method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
688
            s = MEMORY_SLOT_EJECT_METHOD;
689
            aml_append(method,
690
                       aml_call2(s, aml_name("_UID"), aml_arg(0)));
691
            aml_append(dev, method);
692

693
            aml_append(dev_container, dev);
694
        }
695

696
        /* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
697
         *     If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
698
         */
699
        method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
700
        for (i = 0; i < nr_mem; i++) {
701
            ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
702
            aml_append(ifctx,
703
                aml_notify(aml_name("MP%.02X", i), aml_arg(1))
704
            );
705
            aml_append(method, ifctx);
706
        }
707
        aml_append(dev_container, method);
708
    }
709
    aml_append(table, dev_container);
710

711
    if (event_handler_method) {
712
        method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
713
        aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
714
                                     MEMORY_SLOT_SCAN_METHOD));
715
        aml_append(table, method);
716
    }
717

718
    g_free(mhp_res_path);
719
}
720