My system hangs when a Burst Read is triggered by a Cache Line Read over the PLB2OPB bridge requested by the PowerPC; the system also hangs when the Burst Read is triggered using the OPB Central DMA.
In the MHS, the PARAMETER C_INCLUDE_BURST_SUPPORT = 1 is set.
This problem has been fixed in core included in the latest EDK 8.1i Service Pack, available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is EDK 8.1i Service Pack 1.