Doug Chapman wrote:
> Paulo,
Hi, Doug
> I have been working with 2.6.X kernels on my TS-7260 and I imagine some
> of the issues are the same. A couple of tips:
>
> 1) printk doesn't work early on in the boot so the kernel may be giving
> you an error but you don't see it. To work around this you can edit
> kernel/printk.c to add a call to "printascii()" which does work early
> in the bootup:
>
>
> /* Emit the output into the temporary buffer */
> printed_len = vscnprintf(printk_buf, sizeof(printk_buf), fmt,
> args);
> printascii(printk_buf);
Thanks. That is certainly very helpful. I had to dig just a little to
find out that I needed to set CONFIG_DEBUG_LL in order to have the debug
functions compiled in, or else I would get an undefined symbol error.
> 2) for the TS-7260/7250 with 64MB RAM for some reason the kernel isn't
> happy with the upper 32MB of ram. I have to add the following boot
> arguments to the kernel:
>
> mem= mem= mem= mem=
>
> however I imagine the 7400 may be rather different.
The memory map seems very similar, not to say exactly alike. However, my
board has 64Mb, but I read there are currently some problems with the
upper 32Mb and 2.6 on another thread, so I guess I'll just keep it
simple for now and just try to make things work with 32Mb.
With the "mem=..." command line and the "printascii" change, I can see
the kernel actually boots just fine, but fails to discover the root
file-system. My bad :P
I'll try to fix this in the next couple of days and report back.
Thanks a lot for the help,
--
Paulo Marques - www.grupopie.com
"The face of a child can say it all, especially the
mouth part of the face."
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