Scott Wood wrote:

On 06/02/2010 03:06 AM, Martyn Welch wrote:

quoted

quoted

quoted

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I think that's a more fundamental change to CPM early debug than I
can
handle right now.

Is IMMRBASE on your board at some address that has a low likelihood of
conflicting when treated as a kernel effective address?

It's at 0x0f000000, is seems ok, but then I'm not sure I fully
understand kernel effective addresses.

That overlaps userspace -- is the BAT cleared before userspace starts?

To be honest, once I'd got the device booting past the early debug
stage, I rebuilt the kernel without udbg in it...

If you don't want to do the fixmap stuff, might want to at least just
leave it at the current arbitrary effective address, which hasn't
seemed to cause much trouble so far.

Given that I've now switched udbg off in the kernel config, I really
can't substantiate spending much more time on this. This patch was
mainly to help others that maybe struggling to bring up Linux on a
device with CPM serial.

I'll try and get a revised patch out soon which keeps the current
arbitrary effective address.

Martyn

But fixmap is the right way to do it.

-Scott

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