Due to a problem with the Intel® Stratix® 10 Secure Device Manager firmware in the Intel® Quartus® Prime Pro Programmer software version 18.1 , the Hard Processor System may encounter an error while programming a large FPGA core image. In U-boot, this problem may result in a hang or resemble the following error:
SOCFPGA_STRATIX10 # fpga load 0 ${loadaddr}${filesize}
....RECONFIG_DATA error: 00000004, Unknown error!