Advanced Configuration and Power Interface Specification

ACPI Platform Error Interfaces (APEI)
Field
Function 2 22 Identifies the PCI Function number of the root port.
If the GLOBAL flag is specified, this field is ignored.
Device Control 2 24 Device control bits with which to initialize the device.
Reserved 2 26 Must be zero.
Uncorrectable Error 4 28 Value to write to the root port’s Uncorrectable Error Mask register.
Mask
Uncorrectable Error
Severity
Correctable Error
Mask
Advanced Error
Capabilities and
Control
Root Error
Command
Byte
Length
Byte
Offset
Description
4 32 Value to write to the root port’s Uncorrectable Error Severity
register.
4 36 Value to write to the root port’s Correctable Error Mask register.
4 40 Value to write to the root port’s Advanced Error Capabilities and
Control Register.
4 44 Value to write to the root port’s Root Error Command Register.
18.3.2.4 PCI Express Device AER Structure
PCI Express devices may implement AER support. This table contains information platform
firmware supplies to OSPM for configuring AER support on a given PCI Express device.
The HEST may contain one entry of this type for each PCI Express endpoint device if none of the
entries has the GLOBAL flag set. If the GLOBAL flag is set, there may only be one entry of this
type and the information contained in that entry will be applied to all PCI Express endpoint devices.
Table 18-327 PCI Express Device AER Structure
Field
Byte
Length
Byte
Offset
Description
Type 2 0 7 – AER Endpoint.
Source Id 2 2 Uniquely identifies the error source.
Reserved 2 4 Reserved.
Flags 1 6 Bit [0] - FIRMWARE_FIRST: If set, indicates that system
firmware will handle errors from this source first.
Bit [1] – GLOBAL: If set, indicates that the settings contained in
this structure apply globally to all PCI Express Devices.
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 the OSPM.
Number of Records
To Pre-allocate
4 8 Indicates the number of error records to pre-allocate for this error
source. Must be >= 1.
Version 6.0 721