[U-Boot-Users] passing bootargs to Linux on NIOS
Wolfgang Denk
wd at denx.de
Thu Aug 5 15:42:03 CEST 2004
In message <41120FD7.9070002 at imms.de> you wrote:
>
> I'm currently implementing the bootm command for the NIOS processor from
> Altera. I'd like to pass boot arguments to the kernel. I tried to figure
> out how it works in other architectures, but I'm still clueless.
What exactly don't you understand?
> I call the function theKernel(...) with some arguments like I have seen
> it in other implementations. Now my question is, how do I access these
> arguments in the kernel?. I know the NIOS processor is passing the first
Well, how does the NIOS version of the kernel access it's boot arguments?
> 4 arguments in registers when calling a function as a subroutine. But in
> the linux kernel in main.c is another call in the function
main.c is not the right place to look. You want to check the kernel's
entry point, i. e. "_start" (there is probably some "head.S" file n
your source tree?).
> Or should I just define a piece of memory to put the arguments in? It
> will be hard coded in the kernel then.
You design it...
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
The use of Microsoft crippleware systems is a sin that carries with
it its own punishment.
-- Tom Christiansen in <6bo3fr$pj8$5 at csnews.cs.colorado.edu>
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