Has anyone done any work with U-Boot on the AU1000 processor? I would like to understand the level of effort required to port U-Boot to a board based on this processor. I am intimately familiar with PPCBoot/U-Boot on PowerPC platforms and numerous PPC implementations. However, I'm just starting the climb up the 'MIPS' learning curve. :)
According to the AMD documentation, the AU1000 is based in the 'MIPS32' instruction set/architecture, which I presume is different from R3000/R4000 for which I see some level of support in the current U-Boot release. Grepping through a recent Linux source tree, I do see there is a specific CONFIG_CPU_* for MIPS32, and I've taken a brief look at where this is used. Specifically MMU and some CPU features appear to be handled differently from R3K/4K.
I'd appreciate any input/feedback on what would be required to add support in U-Boot for this processor/architecture.
Thanks in advance,
Chris Hallinan DS4.COM, Inc.