This is arch specific in U-Boot but I'd also check that your MIPS kernel has support for a) correctly parsing the U-Boot environment provided to it and b) providing the required data to other parts of the kernel for utilisation of the ram disk, eg initrd_start / initrd_end as an example.
If you're struggling to pass other args to the kernel then it sounds like there is more of a fundamental issue somewhere, though. Maybe just double check Documentation/kernel-parameters.txt to make sure you're passing syntax in a form that the kernel will recognise?
Hope that helps.
Cheers, -- Matt
I don't know yet, if it can or can't pass other arguments. I check only that one so far. But the command line parameters work well, I tried the kgdb, the ramdisk, etc. It's only a problem with this environment variable. But I'm just debugging...
I checked, and it seems, that the kernel doesn't check anywhere nor the initrd_start and initrd_size, nor the flash_start and flash_size environment parameters, but checks the memsize and ethaddr parameters. At least I couldn't find it. Is it true, or I'm blind? Did anybody use this U-Boot feature?
Best regards, Robert Hodaszi