Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
Field
Interleave Structure Index 2 40 Refers to the interleave description that shall be used for
the range described by this structure. Value of 0 indicates
that this range is not interleaved if InterleaveWays is set
to 1 else indicates that interleave is not described for this
region. See Table 5-130 for the interpretation of the
setting:
InterleaveWays 2 42 Number of Memory Devices participating in this
interleave (including self). If interleave ways is unknown,
this field is set to 0. Otherwise, set to indicate the actual
interleave ways.
NOTE: If this is a one-way interleave (i.e. only one DIMM
is part of this interleave), this field is set to 1.
Memory Device State
Flags
Byte
Length
Reserved 2 46
Byte
Offset
Description
2 44 Bit [0] set to 1 to indicate that the previous SAVE to the
Memory Device failed.
Bit [1] set to 1 to indicate that the last RESTORE from the
Memory Device failed.
Bit [2] set to 1 to indicate that platform flush of data to
Memory Device failed. As a result, the restored data
content may be inconsistent even if SAVE and
RESTORE do not indicate failure.
Bit [3] set to 1 to indicate that the Memory Device is
observed to be not armed prior to OSPM hand off. A
Memory Device is considered armed if it is able to accept
persistent writes.
Bit [4] set to 1 to indicate that the Memory Device
observed SMART and health events prior to OSPM
handoff.
Bit [5] is set to 1 to indicate that platform firmware is
enabled to notify OSPM on SMART and health events
related to the memory device using Notify codes as
specified in Section 5.6.6.
Table 5-130 Interleave Settings Interpretation
Structure
Index
Interleave
Ways
Interpretation
0 0 Interleave is unknown and not described for this region
0 1 Only this Memory Device is part of the one way interleave
0 > 1 Interleaved & the interleave is not described for this region
> 0 > 1 Interleaved & the interleave is described for this region
All other combinations
Invalid case
Note: Structure Index=0, InterleaveWays !=1 is to allow a PM range which is interleaved but the actual
interleave is not described but only provides the physical MemoryDevices (as described by
Version 6.0 207