Re: IO delay, port 0x80, and BIOS POST codes

[Andi Kleen]

Martin Wilck <[e-mail]> writes:

> On Thu, 14 Mar 2002, Thunder from the hill wrote:
> 
> > I also remember this been discussed anually. Making it configurable with
> > a warning might be a solution, but that's nothing we could decide. Maybe
> > add a config option? It night be a [DANGEROUS] one, so the guys and gals
> > who might compile are warned of changing this.
> 
> It doesn't even have to be a config option - a line
> 
> /* Port used for dummy writes for I/O delays */
> /* Change this only if you know what you're doing ! */
> #define DUMMY_IO_PORT 0x80
> 
> in a header file would perfectly suffice.

That effectively already exists. You just need to change the __SLOW_DOWN_IO
macro in include/asm-i387/io.h

-Andi