what's the meaning of Propagation Segment?
The description is :
This 3-bit field defines the length of the Propagation Segment in the bit time. The valid programmable
values are 0-7. This field can only be written in Freeze mode as it is blocked by hardware in other modes
Propagation Segment Time = (PROPSEG + 1) * Time-Quanta.
Time-Quantum = one Sclock period.
code from linux: