Fwd: SimNOW VGA int 1a

[ron minnich]

one other note.

ron

---------- Forwarded message ----------
From: ron minnich 
Date: Thu, Oct 16, 2008 at 12:25 PM
Subject: Re: [coreboot] SimNOW VGA int 1a
To: Marc Jones 
Cc: Myles Watson , Jordan Crouse

On Thu, Oct 16, 2008 at 12:19 PM, Marc Jones  wrote:
> AH! I see. We shouldn't be running out of the ROM. That will be slow. We
> should copy the VGA BIOS to real memory and run it there.
>
> Why are you doing ROM init in stage0? I thought this was well into stage2.

So, safety tip: we can't call ANY ROM in stage2 when we're running
doing ROM init.

And I just realized the problem: we're calling printk and printk is in ROM.

no printks allowed in pcibios.c unless we move printk to RAM, i.e.
compile printk into stage2.

What a revolting development this is! Our beautiful "common code in
ROM" idea is going down in flames.

ron