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Yes, you could use your Nios FPGA as the micro to configure the other three non-Nios FPGAs from the CFI FLASH. You'll just have to decide how to boot the Nios FPGA. You won't be able to boot that from the same CFI FLASH without an external controller.
You can choose whether to connect the CFI FLASH's data pins directly to the configuration data lines (of the 3 non-Nios FPGAs) or not. Your Nios FPGA will have to control nCE and nCONFIG, and monitor nSTATUS and/or CONF_DONE, but whether you route the data directly from the FLASH or through the Nios FPGA is up to you. Going through gives you greater flexibility, but consumes more pins.
Happy New Year,
Alex
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Thanks and Happy new year :)
Just one more side question, I have SDRAM, CFI NOR, NAND flash, SRAMs in my system, is the IP core information required for pin planning and can I connect the pins according to the data lines given in the data sheets? I am not very sure about altera FPGAs, so this is just to be certain.
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