Messages in this thread | | | Subject | Re: 2.6.6-mm5 | From | Roland Dreier <> | Date | 24 May 2004 10:43:30 -0700 |
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Eric> If no hardware actually cared or someone could show me that Eric> you can't generate a 64bit memory I/O cycle on the PCI bus Eric> that would be interesting. I have seen several drivers that Eric> care. Later today I intend to look at my pci docs and Eric> confirm that 64bit I/O cycles do exist on the bus, even in Eric> 32bit slots. PCI bus traffic is packet based so I would be Eric> strongly surprised if 64bit cycles did not exist.
Hang on -- how could you generate a 64-bit cycle on a 32-bit PCI bus? By definition a 32-bit PCI bus can only transfer 32 bits per cycle.
PCI Express traffic is packet based but parallel PCI definitely is not.
- Roland
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