Reading out LUTM content

Hi all,

Following problem: We have an Xilinx Virtix 5, having an implementation 
running on it. What we want to do, is to read out all the bits (or the 
state) of the different LUTM cells.

At the moment, we are outputting this information with the help of an 
UART module. However, we are wondering whether we could completely get
rid of the UART and use the JTAG instead somehow.

So without using Chipscop, is there a way that allows us to readback all
LUTM contents using the JTAG interface?

Many thanks!