Re: [Dri-devel] Re: 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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