[EMAIL PROTECTED] wrote: > [EMAIL PROTECTED] wrote: >> Mike Winter wrote: >>> We are developing with an 8248-based platform, and we have a vendor >>> telling us that the PCI hardware is unreliable on this CPU family, >>> in particular the DMA functionality. A quick search of this list >>> doesn't turn up any horror stories, although the processor does have >>> some PCI errata listed. Does anybody have any practical experience >>> using PCI on the 8248 or similar that they can share with me? >>> Thanks. > > We're using all four PCI DMA's on 8265 and 8280 CPU's. > The only issue we have run into was that we get an occational > bus error > (timeout) reading the PCI-DMA status registers... > We've worked around that by using an exception handler to > just retry the > access when (not if) it fails.
And we have to read the status register multiple times and compare to make sure we have a valid read, as we've seen wacky reads occationally. _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
