Unfortunately, you're going to have to do some work. Either you have
to initialize the contents of a ram (bram or lut ram) with your data,
which can be done through CoreGen after you massage the txt file into
an acceptable format, or you can create a microprocessor-based system
using the EDK and load your txt file into a program or into the Xilinx
filesystem.

I am curious about your application, though. How are you using the
text file?