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    SubjectRe: [Dri-devel] Re: [Linux-fbdev-devel] DRM and pci_driver conversion
    On Fri, Oct 24, 2003 at 06:57:18PM +0200, Petr Vandrovec wrote:
    > We need something more sophisticated. Matrox's hardware has bits
    > 31-16 readable/writable only if bit 0 is set to 1 (ROM enabled; you can
    > (obviously) set bits 31-16 & 0 in one write). When ROM is disabled,
    > bits 31-1 are always read as 0.

    Hmm, I believe it's not true at least for Mystique, Millennium II
    and G400. Otherwise we wouldn't be able to determine ROM size/alignment
    as we do probe with ROM disabled (probe.c, line 125):

    pci_write_config_dword(dev, rom, ~PCI_ROM_ADDRESS_ENABLE);
    pci_read_config_dword(dev, rom, &sz);


    Ivan.
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