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On Tue, 25 Oct 2005, Darren Salt wrote: > > $ dmesg | grep PIIX4 > PCI quirk: region 5000-503f claimed by PIIX4 ACPI > PCI quirk: region 4000-401f claimed by PIIX4 SMB > PIIX4 devres C PIO at 0100-0107 > PIIX4 devres I PIO at 00e0-00e3 > PIIX4 devres J PIO at 00f9-00fc Ok, great. None of those quirks are very interesting per se (they're all in the old legacy region), but that 0xf9-0xfc one is interesting if only because it points out that I should be more careful about the mask/base logic. That quirk is actually set up in a very special way, where it ignores address line #1, and devres J actually covers two PIO ports: 0xf9 and 0xfb (but not the one between). Odd, but it's documented hardware behaviour. So the 0xf9-0xfc thing is strictly not right, and I'll modify my code a bit (probably to mark 0xf8-0xfb instead, which will be what we'd want to do for anything in the non-legacy region). > Machine is a Compaq Armada M700; /proc/ioports & lspci output are attached. Thanks, that lspci output was what I needed to verify the mask details. The printouts look good. I wish somebody had a PIIX with a MMIO quirk just to verify that I got that case right too, but it's pretty unlikely that is ever used in practice. Linus - 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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