Need a controller that interfaces to both the AHB-Lite and QSPI. During configuration, the ARM writes an image to the QSPI Flash via this controller. After configuration, if requested, the ARM will indicates (via ADDR control bits) which configuration image to grab out of QSPI Flash to send to another block outside of this controller. In essence, it can be summarized in 2 operations:
• Write operation: ARM (via AHB Lite) to QSPI Flash
• Read operation: QSPI Flash to another block.