The GSR and GTS signals are defined in the file: <Vivado_Install_Dir>/data/vhdl/src/unisims/primitive/GLBL_VHD.vhd.
To use the
GLBL_VHD component you must instantiate it into the test bench.
The GLBL_VHD component declares the global GSR and GTS signals and automatically pulses GSR for 100 ns.
The following code snippet shows an example of instantiating the
GLBL_VHD component in the test bench and changing the assertion pulse width of the Reset on Configuration (ROC) to 90 ns:
GLBL_VHD inst:GLBL_VHD generic map (ROC_WIDTH => 90000);