Change the Hardware Specification File

You can change the hardware specification file of the SDK hardware project using this procedure:

Select the Hardware Project in the Project Explorer view.
Right-click on the hardware project and select Change Hardware Specification File....
A dialog will pop-up indicating the changes that will be made to the software projects associated with this hardware platform. Click Yes to continue.
In the dialog specify the source hardware specification file and click Ok

SDK will do the following:

Update the hardware project with the new hardware specification file, bitstream and BMM file.
If a processor sub-system was removed from the hardware design, close the software projects, both board support package and referenced application projects, targetted to that processor.
Update the board support package project with changes in the hardware processor sub-system. This include removal of drivers for removed peripherals and addition of default drivers for new peripherals.
Re-build all the software projects related to the hardware project.