Local Port Context Management

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.4 English

When the AHCI controller is connected to a port multiplier supporting FIS-based switching a local context store can be enabled to avoid the process of lookup of the related memory addressing for data transactions. This feature facilitates quick context switching and allows the AHCI to operate with multiple devices in a seamless manner. Each context stores information about the memory address and SATA block address of any executing command on the first four ports of a port multiplier.