@Matt Venn @Tim Edwards how is housekeeping spi different from spi master in management area? Both r connected to gpio and can run one at a time?

The housekeeping SPI is a slave, not a master. It controls the configuration of all the GPIOs, the DLL, and has the registers for the vendor/product/user IDs, and a few other things. It has a dual interface, so those registers defined in housekeeping can be accessed either from the CPU via wishbone bus, or via the SPI from a host computer.