[U-Boot-Users] Need help booting an unsupported OS on ARM
wd at denx.de
Sun Feb 13 01:15:12 CET 2005
In message <2da76b6505021215452596cc8a at mail.gmail.com> you wrote:
> I am trying to use U-Boot to start up a home grown OS. How can I make
> my OS a little more U-Boot friendly, or visa-versa? The specific
You can do both, but in general you don't have to.
The most trivial thing is to start your OS using the "go" command -
assuming that the OS does not require to receive any information from
the boot loader. Or, assuming the OS uses ELF files, you can use the
"bootelf" copmmand, too.
> problem I'm having is that when I issue a SWI on the arm, the U-Boot
> interrupt routines get used instead of mine.
Your OS is expected to install it's own interrupt handlers, of
> I can see why that is happening because the vectors in the flash
> address point to the U-Boot routines, but I'm wondering if there is a
This is only before relocation.
> way to set a secondary jump so that my routines are used.
You may want to peek for example at the Linux kernel code how to
install your own interrupt handlers.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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