On 5/13/06, Benjamin Herrenschmidt <[email protected]> wrote:
There are reasons why you may have to read the image at c0000... There's a bunch of laptops where it's in fact the only way to get to the video BIOS as it doesn't have a ROM attached to the video chip (it's burried in the main BIOS which thankfully copied it to c0000 when running it). In some cases, the BISO ROM self-modifies it's c0000 and it's that modified copy that the X (or fbdev) driver should get. Remeber that drivers needs access to the ROM for more than just POSTing the chip...
Whenever klibc gets merged it would probably be good to add a libemu86. Did you get one put together that you're happy with? Between the ROM attribute, klibc and libemu86 there will then be enough support to write a tiny POST program that POSTs secondary and non-x86 primary cards at boot. It will still need a little support in sysfs for PCI bus VGA routing but we're almost there. -- Jon Smirl [email protected] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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