[coreboot] SimNOW and SeaBIOS

[Kevin O'Connor]

On Mon, Mar 09, 2009 at 10:55:28AM -0700, Myles Watson wrote:
> SeaBIOS won't work with SimNOW unless you make the error checking in
> ata.c less strict.
> 
> This is the message you get:
> ata_transfer : no sectors left (status 00000008)
> 
> I reported it to the SimNOW team since it seems like they're not
> following the spec, but it's been a long time and the bug is still
> there.  To get past it:
>     dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status);
> +       if (status != 0x8)
>               return -7;

Yeah, I've run into this too.  It looks like the SimNOW CDROM doesn't
clear the DRQ bit - even though the spec definitely says it must be
cleared.

I make the same change locally (just warn and not abort the transfer)
when I test with SimNOW.

-Kevin