Advanced Configuration and Power Interface Specification

ACPI Platform Error Interfaces (APEI)
FRU Id 16 28 Identifies the Field Replaceable Unit.
See the FRU Id field of the Section Descriptor in the UEFI 2.1
specification.
FRU Text 20 44 Text field describing the Field Replaceable Unit.
See the FRU Text field of the Section Descriptor in the UEFI 2.1
specification.
Data
Error
Data
Length
64 Generic error data.
The information contained in this field must match one of the error
record section types defined in Appendix N of the UEFI 2.1
specification.
18.3.2.6.2 Event Notification For Generic Error Sources
An event notification is recommended for corrected errors where latency in processing error reports
is not critical to proper system operation. The implementation of Event notification requires the
platform to define a device with PNP ID PNP0C33 in the ACPI namespace, referred to as the error
device. This device is used to notify the OSPM that a generic error source is reporting an error. Since
multiple generic error sources can use event notification, it is the responsibility of the OSPM to scan
the list of these generic error sources and check the block status field ( Table 18-330) to identify the
source that reported the error.
The platform is responsible for providing a control method that issues a NOTIFY on the error device
(PNP0C33), with a notification code of type 0x80.
For traditional ACPI platforms the event signaling follows the model describedin Section 5.6.4.1.1.
The platform implements a general purpose event (GPE) for the error notification, and the GPE has
an associated control method.
An example of a GPE control method for error notification is the following:
Method (\_GPE._L08) { // GPE 8 level error notification
}
Notify (error_device, 0x80)
For HW-reduced ACPI platforms, the event signaling follows the model described in
Section 5.6.5. The platform implements a GPIO pin for the error notification, and the GPIO
pin has an associated _AEI object and control method.
An example of an _EVT control method for error notification is the following:
Method (\_EVT) { // GPIO pin 300 error notification
}
Switch (Arg1) {
}
Case (300) {
}
Notify (error_device, 0x80)
The overall flow when the platform uses the event notification is:
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