[coreboot] option rom progress and some issues

Kevin O'Connor kevin at koconnor.net
Wed Aug 12 15:17:40 CEST 2009

On Wed, Aug 12, 2009 at 03:29:06PM +0800, Jason Wang wrote:
> Hi Kevin,
>     The Seabios try to booting usbrom with IPL_TYPE_BEV, which i think
> should use IPL_TYPE_HARDDISK, right? Followed by BIOS BOOT Specification
> I think it can add
> #define IPL_TYPE_USBROM 0x05 to support BCV, how do you think about that?

SeaBIOS is overloading those flags, and I agree it's confusing.  The
flags for BCV tables are only used in run_bcv(), add_bcv(), and
add_bcv_hd().  It's not necessary to add a new flag.

On Wed, Aug 12, 2009 at 10:59:51AM +0800, Jason Wang wrote:
> I use a BCV now, sorry for messing this two types. Which i use is BCV.
> I  tried to put only an "lretw" in BCV. but still failed.
> > I don't know why you can't return - it should work.  Maybe the stack
> > or gdt/idt was changed?

As before, I'd double check that you've restored the stack, segments,
cr0, and gdt/idt.

> > As above, define a BCV and hook int13 from the BCV handler.
> >
> So, BCV handler is used to hook int13, anything else that BCV should do?

That should be it.


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