Abstract: Systems and methods herein are for a Non-Transparent Bridges (NTBs) that are scalable and configurable to use equally sized or spaced windows and a common lookup database for remapping writes without completions. The equally sized or spaced windows in the address space are addressable by a starting address and a size to support communication between host machines or endpoints. The common lookup database is to allow selection of one the windows associated with a mapping between address spaces of different domains and is also to accept remapping writes through the at least one NTB to modify the mapping without need for a completion to be returned to a source of the remapping writes.

Abstract: Systems and methods herein are for a Non-Transparent Bridges (NTBs) that are scalable and configurable to use equally sized or spaced windows and a common lookup database for remapping writes without completions. The equally sized or spaced windows in the address space are addressable by a starting address and a size to support communication between host machines or endpoints. The common lookup database is to allow selection of one the windows associated with a mapping between address spaces of different domains and is also to accept remapping writes through the at least one NTB to modify the mapping without need for a completion to be returned to a source of the remapping writes.

Abstract: Methods and apparatuses are provided for locking a transmitter oscillator to a reference clock signal in a frequency domain. The apparatus includes a digital phase-frequency detector. The digital phase-frequency detector includes a mod-M counter, a mod-N counter, and a count evaluation digital circuit. The mod-M counter is designed to count reference clock cycles of a reference clock signal. The mod-N counter is designed to count local clock cycles of a local clock signal. The count evaluation digital circuit is designed to compare the counted reference clock cycles and the local clock cycles with a predefined register setting to generate a control signal as a feedback signal. The control signal is transmitted to the transmitter oscillator through a frequency-locked loop circuit for adjusting the frequency of the transmitter oscillator to be consistent with the reference clock signal.