Datasheet

Datasheet, Volume 2 71
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Processor Integrated I/O (IIO) Configuration Registers
3.2.4.47 DEVSTS—PCI Express* Device Status Register
DEVSTS
Bus: 0 Device: 0 Function: 0 Offset: F2h (DMI2 MODE)
Bus: 0 Device: 0 Function: 0 Offset: 9Ah (PCIe* MODE)
Bus: 0 Device: 1 Function: 0–1 Offset: 9Ah
Bus: 0 Device: 2 Function: 0–3 Offset: 9Ah
Bus: 0 Device: 3 Function: 0–3 Offset: 9Ah
Bit Attr
Reset
Value
Description
15:6 RV 0h Reserved
5RO 0h
Transactions Pending
Does not apply to Root/DMI ports, that is, bit hardwired to 0 for these devices.
4RO 0b
AUX Power Detected
Does not apply to the processor
3RW1C0b
Unsupported Request Detected
This bit indicates that the root port or DMI port detected an Unsupported Request.
Errors are logged in this register regardless of whether error reporting is enabled
or not in the Device Control Register.
1 = Unsupported Request detected at the device/port. These unsupported
requests are NP requests inbound that the root port or DMI port received and
it detected them as unsupported requests (for example, address decoding
failures that the root port detected on a packet, receiving inbound lock reads,
BME bit is clear and so forth).
0 = No unsupported request detected by the root or DMI port
Note: This bit is not set on peer-to-peer completions with UR status that are
forwarded by the root port or DMI port to the PCIe/DMI link.
2RW1C0b
Fatal Error Detected
This bit indicates that a fatal (uncorrectable) error is detected by the root or DMI
port. Errors are logged in this register regardless of whether error reporting is
enabled or not in the Device Control register.
1 = Fatal errors detected
0 = No Fatal errors detected
1RW1C0b
Non Fatal Error Detected
This bit gets set if a non-fatal uncorrectable error is detected by the root or DMI
port. Errors are logged in this register regardless of whether error reporting is
enabled or not in the Device Control register.
1 = Non Fatal errors detected
0 = No non-Fatal Errors detected
0RW1C0b
Correctable Error Detected
This bit gets set if a correctable error is detected by the root or DMI port. Errors
are logged in this register regardless of whether error reporting is enabled or not
in the PCI Express Device Control register.
1 = Correctable errors detected
0 = No correctable errors detected