Messages in this thread | | | Date | Sat, 13 May 2006 20:56:06 -0400 | From | "Jon Smirl" <> | Subject | Re: Add a "enable" sysfs attribute to the pci devices to allow userspace (Xorg) to enable devices without doing foul direct access |
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On 5/13/06, Benjamin Herrenschmidt <benh@kernel.crashing.org> 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 jonsmirl@gmail.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org 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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