ISE
Using Partitions - What to do First
A Partition defines a source instance that is marked for reuse. Partitions can be HDL, Schematic or EDIF source instances at any level of the hierarchy. When a lower-level source instance is defined as a Partition, the top module is automatically defined as a Partition as well. Partitions are enabled by creating a Partition for a node in the design hierarchy. In Verilog, the Partition is set on a module instance. In VHDL the Partition is set on an entity architecture.
  1.  Before synthesis, decide which nodes in the design hierarchy will be Partitions. The design hierarchy is visible in the Project Navigator graphical environment in the Sources tab.
  2.  Load all the design files into the project to see the complete design hierarchy.
  3.  If using a Tcl environment, the command search get returns the design hierarchy for the project. The design hierarchy reflects the files added to the project with the xfile add command.
See Also
Using Partitions - To Use Partitions
Assigning Package Pins
Partition Overview
Creating New Partitions
Using the Tcl Shell Tab

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