I'm using Spartan 6 slx100 device loaded from BPI 16 bit width flash chip :RC28F256P33TF In order to achieve multiboot functionality I follow following guides from forum: http://forums.xilinx.com/t5/Embedded-Processing/MultiBoot-help-on-SPARTAN6/m-p/125468#M3976 or http://forums.xilinx.com/t5/Spartan-Family-FPGAs/Spartan-6-multiboot-configuration-header/td-p/19993... I perform header file, with desired address of Golden image : 0x20000 and Multiboot image : 0x500000 Header data looks like: ////////////////// FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF AA995566 31E1FFFF 32610000 32810028 <== Multiboot image address 0x50000 divided by 2 32A10000 32C10001 <== Golden image address 0x20000 divided by 2 32E10000 30A10000 33012000 <== MODE_REG 3201005F 30A1000E 20002000 20002000 ///////////// On this header I perform bitswap operation on each byte and program it to flash address 0x0
Also multiboot image and golden image programmed as well. Desired action is that multiboot image would be loaded upon powerup. It is actually happens. Multiboot image loaded as desired. Now to the point. I want to test fallback functionality of Spartan 6 with BPI flash. I corrupt intentionally multiboot image and expect for golden image to load when I recycle power This not happens, so no fallback is occurred. If I change multiboot address to 0x20000 to test my golden image and change header file accordingly Spartan 6 successfully boots. My question is how I create proper header file and if I need to perform some other magic on bitfiles in order to fallback and multiboot features work
