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    SubjectRe: [RFC] ARM DMA mapping TODO, v1
    > I believe that the PC graphics cards that have noncoherent DMA mappings
    > are all of the unified memory (integrated into the northbridge) kind,
    > so they are not on the same host bridge as all regular PCI devices,
    > even if they appear as a PCI device.

    The AGP GART is not coherent on a lot of systems - not necessarily
    unified memory though, it can be a plug in AGP card too.
    The GART is basically an IOMMU (and indeed in the later AMD case used
    exactly as that)

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      Last update: 2011-04-29 13:57    [W:0.020 / U:158.104 seconds]
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