in hw/acpi/memory_hotplug.c [344:730]
void build_memory_hotplug_aml(Aml *table, uint32_t nr_mem,
const char *res_root,
const char *event_handler_method,
AmlRegionSpace rs, hwaddr memhp_io_base)
{
int i;
Aml *ifctx;
Aml *method;
Aml *dev_container;
Aml *mem_ctrl_dev;
char *mhp_res_path;
mhp_res_path = g_strdup_printf("%s." MEMORY_HOTPLUG_DEVICE, res_root);
mem_ctrl_dev = aml_device("%s", mhp_res_path);
{
Aml *crs;
aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
aml_append(mem_ctrl_dev,
aml_name_decl("_UID", aml_string("Memory hotplug resources")));
crs = aml_resource_template();
if (rs == AML_SYSTEM_IO) {
aml_append(crs,
aml_io(AML_DECODE16, memhp_io_base, memhp_io_base, 0,
MEMORY_HOTPLUG_IO_LEN)
);
} else {
aml_append(crs, aml_memory32_fixed(memhp_io_base,
MEMORY_HOTPLUG_IO_LEN, AML_READ_WRITE));
}
aml_append(mem_ctrl_dev, aml_name_decl("_CRS", crs));
aml_append(mem_ctrl_dev, aml_operation_region(
MEMORY_HOTPLUG_IO_REGION, rs,
aml_int(memhp_io_base), MEMORY_HOTPLUG_IO_LEN)
);
}
aml_append(table, mem_ctrl_dev);
dev_container = aml_device(MEMORY_DEVICES_CONTAINER);
{
Aml *field;
Aml *one = aml_int(1);
Aml *zero = aml_int(0);
Aml *ret_val = aml_local(0);
Aml *slot_arg0 = aml_arg(0);
Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
char *mmio_path = g_strdup_printf("%s." MEMORY_HOTPLUG_IO_REGION,
mhp_res_path);
aml_append(dev_container, aml_name_decl("_HID", aml_string("PNP0A06")));
aml_append(dev_container,
aml_name_decl("_UID", aml_string("DIMM devices")));
assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
aml_append(dev_container,
aml_name_decl(MEMORY_SLOTS_NUMBER, aml_int(nr_mem))
);
field = aml_field(mmio_path, AML_DWORD_ACC,
AML_NOLOCK, AML_PRESERVE);
aml_append(field, /* read only */
aml_named_field(MEMORY_SLOT_ADDR_LOW, 32));
aml_append(field, /* read only */
aml_named_field(MEMORY_SLOT_ADDR_HIGH, 32));
aml_append(field, /* read only */
aml_named_field(MEMORY_SLOT_SIZE_LOW, 32));
aml_append(field, /* read only */
aml_named_field(MEMORY_SLOT_SIZE_HIGH, 32));
aml_append(field, /* read only */
aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
aml_append(dev_container, field);
field = aml_field(mmio_path, AML_BYTE_ACC,
AML_NOLOCK, AML_WRITE_AS_ZEROS);
aml_append(field, aml_reserved_field(160 /* bits, Offset(20) */));
aml_append(field, /* 1 if enabled, read only */
aml_named_field(MEMORY_SLOT_ENABLED, 1));
aml_append(field,
/*(read) 1 if has a insert event. (write) 1 to clear event */
aml_named_field(MEMORY_SLOT_INSERT_EVENT, 1));
aml_append(field,
/* (read) 1 if has a remove event. (write) 1 to clear event */
aml_named_field(MEMORY_SLOT_REMOVE_EVENT, 1));
aml_append(field,
/* initiates device eject, write only */
aml_named_field(MEMORY_SLOT_EJECT, 1));
aml_append(dev_container, field);
field = aml_field(mmio_path, AML_DWORD_ACC,
AML_NOLOCK, AML_PRESERVE);
aml_append(field, /* DIMM selector, write only */
aml_named_field(MEMORY_SLOT_SLECTOR, 32));
aml_append(field, /* _OST event code, write only */
aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
aml_append(field, /* _OST status code, write only */
aml_named_field(MEMORY_SLOT_OST_STATUS, 32));
aml_append(dev_container, field);
g_free(mmio_path);
method = aml_method("_STA", 0, AML_NOTSERIALIZED);
ifctx = aml_if(aml_equal(slots_nr, zero));
{
aml_append(ifctx, aml_return(zero));
}
aml_append(method, ifctx);
/* present, functioning, decoding, not shown in UI */
aml_append(method, aml_return(aml_int(0xB)));
aml_append(dev_container, method);
aml_append(dev_container, aml_mutex(MEMORY_SLOT_LOCK, 0));
method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
{
Aml *else_ctx;
Aml *while_ctx;
Aml *idx = aml_local(0);
Aml *eject_req = aml_int(3);
Aml *dev_chk = aml_int(1);
ifctx = aml_if(aml_equal(slots_nr, zero));
{
aml_append(ifctx, aml_return(zero));
}
aml_append(method, ifctx);
aml_append(method, aml_store(zero, idx));
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
/* build AML that:
* loops over all slots and Notifies DIMMs with
* Device Check or Eject Request notifications if
* slot has corresponding status bit set and clears
* slot status.
*/
while_ctx = aml_while(aml_lless(idx, slots_nr));
{
Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
aml_append(while_ctx, aml_store(idx, slot_selector));
ifctx = aml_if(aml_equal(ins_evt, one));
{
aml_append(ifctx,
aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
idx, dev_chk));
aml_append(ifctx, aml_store(one, ins_evt));
}
aml_append(while_ctx, ifctx);
else_ctx = aml_else();
ifctx = aml_if(aml_equal(rm_evt, one));
{
aml_append(ifctx,
aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
idx, eject_req));
aml_append(ifctx, aml_store(one, rm_evt));
}
aml_append(else_ctx, ifctx);
aml_append(while_ctx, else_ctx);
aml_append(while_ctx, aml_add(idx, one, idx));
}
aml_append(method, while_ctx);
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(one));
}
aml_append(dev_container, method);
method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
{
Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
aml_append(method, aml_store(zero, ret_val));
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method,
aml_store(aml_to_integer(slot_arg0), slot_selector));
ifctx = aml_if(aml_equal(slot_enabled, one));
{
aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
}
aml_append(method, ifctx);
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(ret_val));
}
aml_append(dev_container, method);
method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
{
Aml *mr64 = aml_name("MR64");
Aml *mr32 = aml_name("MR32");
Aml *crs_tmpl = aml_resource_template();
Aml *minl = aml_name("MINL");
Aml *minh = aml_name("MINH");
Aml *maxl = aml_name("MAXL");
Aml *maxh = aml_name("MAXH");
Aml *lenl = aml_name("LENL");
Aml *lenh = aml_name("LENH");
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(aml_to_integer(slot_arg0),
slot_selector));
aml_append(crs_tmpl,
aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_CACHEABLE, AML_READ_WRITE,
0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
0xFFFFFFFFFFFFFFFFULL));
aml_append(method, aml_name_decl("MR64", crs_tmpl));
aml_append(method,
aml_create_dword_field(mr64, aml_int(14), "MINL"));
aml_append(method,
aml_create_dword_field(mr64, aml_int(18), "MINH"));
aml_append(method,
aml_create_dword_field(mr64, aml_int(38), "LENL"));
aml_append(method,
aml_create_dword_field(mr64, aml_int(42), "LENH"));
aml_append(method,
aml_create_dword_field(mr64, aml_int(22), "MAXL"));
aml_append(method,
aml_create_dword_field(mr64, aml_int(26), "MAXH"));
aml_append(method,
aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
aml_append(method,
aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
aml_append(method,
aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
aml_append(method,
aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
/* 64-bit math: MAX = MIN + LEN - 1 */
aml_append(method, aml_add(minl, lenl, maxl));
aml_append(method, aml_add(minh, lenh, maxh));
ifctx = aml_if(aml_lless(maxl, minl));
{
aml_append(ifctx, aml_add(maxh, one, maxh));
}
aml_append(method, ifctx);
ifctx = aml_if(aml_lless(maxl, one));
{
aml_append(ifctx, aml_subtract(maxh, one, maxh));
}
aml_append(method, ifctx);
aml_append(method, aml_subtract(maxl, one, maxl));
/* return 32-bit _CRS if addr/size is in low mem */
/* TODO: remove it since all hotplugged DIMMs are in high mem */
ifctx = aml_if(aml_equal(maxh, zero));
{
crs_tmpl = aml_resource_template();
aml_append(crs_tmpl,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_CACHEABLE,
AML_READ_WRITE,
0, 0x0, 0xFFFFFFFE, 0,
0xFFFFFFFF));
aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
aml_append(ifctx,
aml_create_dword_field(mr32, aml_int(10), "MIN"));
aml_append(ifctx,
aml_create_dword_field(mr32, aml_int(14), "MAX"));
aml_append(ifctx,
aml_create_dword_field(mr32, aml_int(22), "LEN"));
aml_append(ifctx, aml_store(minl, aml_name("MIN")));
aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
aml_append(ifctx, aml_release(ctrl_lock));
aml_append(ifctx, aml_return(mr32));
}
aml_append(method, ifctx);
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(mr64));
}
aml_append(dev_container, method);
method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
AML_NOTSERIALIZED);
{
Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(aml_to_integer(slot_arg0),
slot_selector));
aml_append(method, aml_store(proximity, ret_val));
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(ret_val));
}
aml_append(dev_container, method);
method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
{
Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(aml_to_integer(slot_arg0),
slot_selector));
aml_append(method, aml_store(aml_arg(1), ost_evt));
aml_append(method, aml_store(aml_arg(2), ost_status));
aml_append(method, aml_release(ctrl_lock));
}
aml_append(dev_container, method);
method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
{
Aml *eject = aml_name(MEMORY_SLOT_EJECT);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(aml_to_integer(slot_arg0),
slot_selector));
aml_append(method, aml_store(one, eject));
aml_append(method, aml_release(ctrl_lock));
}
aml_append(dev_container, method);
/* build memory devices */
for (i = 0; i < nr_mem; i++) {
Aml *dev;
const char *s;
dev = aml_device("MP%02X", i);
aml_append(dev, aml_name_decl("_UID", aml_string("0x%02X", i)));
aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
method = aml_method("_CRS", 0, AML_NOTSERIALIZED);
s = MEMORY_SLOT_CRS_METHOD;
aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
aml_append(dev, method);
method = aml_method("_STA", 0, AML_NOTSERIALIZED);
s = MEMORY_SLOT_STATUS_METHOD;
aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
aml_append(dev, method);
method = aml_method("_PXM", 0, AML_NOTSERIALIZED);
s = MEMORY_SLOT_PROXIMITY_METHOD;
aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
aml_append(dev, method);
method = aml_method("_OST", 3, AML_NOTSERIALIZED);
s = MEMORY_SLOT_OST_METHOD;
aml_append(method,
aml_call4(s, aml_name("_UID"), aml_arg(0),
aml_arg(1), aml_arg(2)));
aml_append(dev, method);
method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
s = MEMORY_SLOT_EJECT_METHOD;
aml_append(method,
aml_call2(s, aml_name("_UID"), aml_arg(0)));
aml_append(dev, method);
aml_append(dev_container, dev);
}
/* build Method(MEMORY_SLOT_NOTIFY_METHOD, 2) {
* If (LEqual(Arg0, 0x00)) {Notify(MP00, Arg1)} ... }
*/
method = aml_method(MEMORY_SLOT_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
for (i = 0; i < nr_mem; i++) {
ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
aml_append(ifctx,
aml_notify(aml_name("MP%.02X", i), aml_arg(1))
);
aml_append(method, ifctx);
}
aml_append(dev_container, method);
}
aml_append(table, dev_container);
if (event_handler_method) {
method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
aml_append(method, aml_call0(MEMORY_DEVICES_CONTAINER "."
MEMORY_SLOT_SCAN_METHOD));
aml_append(table, method);
}
g_free(mhp_res_path);
}