Negotiated Lane Map Register @0x200
This register contains a map of the active lanes used by the Controller to form the link during link training. It also contains a bit to indicate whether the Controller reversed the lane number on its lanes during link training.
| Bits | SW | Name | Description | Reset |
|---|---|---|---|---|
| 3:0 | R | Negotiated Lane Map [NLM] | Bit i of this field is set to 1 at the end of link training if Lane i is part of the PCIe link. The value of this field is valid only when the link is in L0 or L0s states. | 0x0 |
| 15:4 | R | Reserved [R70] | Reserved | 0x0 |
| 16 | R | Lane Reversal Status [LRS] | This bit set by the Controller at the end of link training if the LTSSM had to reverse the lane numbers to form the link. | 0x0 |
| 31:17 | R | Reserved [R71] | Reserved | 0x0 |