Advanced Configuration and Power Interface Specification

ACPI Platform Error Interfaces (APEI)
Table 18-324 IA-32 Architecture Corrected Machine Check Structure
Field
Byte
Length
Byte
Offset
Description
Type 2 0 1 – IA-32 Architecture Corrected Machine Check Structure.
Source Id 2 2 Uniquely identifies the error source.
Reserved 2 4 Reserved
Flags 1 6 Bit [0] - FIRMWARE_FIRST: If set, this bit indicates that system
firmware will handle errors from this source first.
All other bits must be set to zero.
Enabled 1 7 If the field value is 1, indicates this error source is to be enabled.
If the field value is 0, indicates that the error source is not to be
enabled.
If FIRMWARE_FIRST is set in the flags field, the Enabled field is
ignored by OSPM.
Number of
Records To Preallocate
Max Sections Per
Record
Notification
Structure
4 8 Indicates the number of error records to pre-allocate for this error
source. Must be >= 1.
4 12 Indicates the maximum number of error sections included in an
error record created as a result of an error reported by this error
source. Must be >= 1.
28 16 Hardware Error Notification Structure as defined in Table 18-332
Number Of 1 44 The number of hardware error reporting banks.
Hardware Banks
Reserved 3 45 Reserved.
Machine Check
Bank Structure[n]
- 48 A list of Machine Check Bank structures defined in
Section 18.3.2.1.1.
18.3.2.2.1 IA-32 Architecture Non-Maskable Interrupt
Uncorrected platform errors are typically reported using the Non-Maskable Interrupt (NMI) vector
(for example, INT 2). This table allows platform firmware to communicate parameters regarding the
configuration and handling of NMI error conditions.
Only one entry of this type is permitted in the HEST.
Table 18-325 IA-32 Architecture NMI Error Structure
Field
Byte
Length
Byte
Offset
Description
Type 2 0 2 – IA-32 Architecture NMI Structure.
Source Id 2 2 Uniquely identifies this error source.
Reserved 4 4 Must be zero.
Number of Records
To Pre-allocate
4 8 Indicates number of error records to pre-allocate for this error
source. Must be >= 1.
Version 6.0 719