Datasheet

Datasheet, Volume 2 119

Processor Integrated I/O (IIO) Configuration Registers
3.2.5.19 LER_CAP—Live Error Recovery Capability Register
Live error recovery is not supported in the processor.
3.2.5.20 LER_HDR—Live Error Recovery Capability Header Register
3.2.5.21 LER_CTRLSTS—Live Error Recovery Control and Status Register
LER_CAP
Bus: 0 Device: 0 Function: 0 Offset: 280h
Bus: 0 Device: 1 Function: 0–1 Offset: 280
Bus: 0 Device: 2 Function: 0–3 Offset: 280
Bus: 0 Device: 3 Function: 0–3 Offset: 280
Bit Attr
Reset
Value
Description
31:20 RO 000h Next Capability Offset
19:16 RO 1h Capability Version
15:0 RO 000Bh
PCI Express Extended Capability ID
Vendor Specific Capability
LER_HDR
Bus: 0 Device: 0 Function: 0 Offset: 284h
Bus: 0 Device: 1 Function: 0–1 Offset: 284
Bus: 0 Device: 2 Function: 0–3 Offset: 284
Bus: 0 Device: 3 Function: 0–3 Offset: 284
Bit Attr
Reset
Value
Description
31:20 RO 018h VSEC Length
19:16 RO 2h VSEC Revision ID
15:0 RO 0004h
Vendor Specific ID
Represents the Live Error Recovery capability
LER_CTRLSTS
Bus: 0 Device: 0 Function: 0 Offset: 288h
Bus: 0 Device: 1 Function: 0–1 Offset: 288
Bus: 0 Device: 2 Function: 0–3 Offset: 288
Bus: 0 Device: 3 Function: 0–3 Offset: 288
Bit Attr
Reset
Value
Description
31 RW1CS 0b
Live Error Recovery Status
Indicates that an error was detected that caused the PCIe port to go into a live
error recovery (LER) mode. While in LER mode, the link goes into a LinkDown
state and all outbound transactions are aborted (including packets that may have
caused the error).
This bit remains set until all the associated unmasked status bits are cleared.
Once this status becomes cleared by clearing the error condition, the link will
retrain into LinkUp state and outbound transactions will no longer be aborted.
A link that is forced into a LinkDown state due to LER does not trigger a "surprise
LinkDown" error in the UNCERRSTS register.
30:1 RV 0h Reserved
0RWS0b
Live Error Recovery Enable
When set, as long as the LER_SS Status bit in this register is set, the associated
root port will go into LER mode. When clear, the root port can never go into LER
mode.