Re: Comment #135 for bugzilla 237666 : a USB3-handling problem with a investigatory fix for a cortex-a72 context
Klaus Cucinauomo via freebsd-arm <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
> Am 20.09.2020 um 22:33 schrieb Mark Millard <[email protected]>: > > > > "OpenBSD can deal with the 3GB limit. In fact it imposes a 1GB DMA limit because there are additional DMA restrictions for the SD controller." ( Mark Kettenis Aug 24, 2020; 4:29am Re: Discuss UEFI settingsin arm64.html/INSTALL.arm64 ) > > —— Mark Kettenis Thu, 16 Apr 2020 14:06:19 -0700 :--- Still thinking about the best approach to deal with this. There is a 1GB limit as well for the "GPU" devices such as the USB 2.0 and SDHC controllers. So it's either setting the DMA constraint to 3GB and adding a bounce buffer implementation, or setting the DMA constraint to 1GB. —--- Well, Mark(Millard:-) , there seems to be a magician in the background and I don’t know why but that guy is always exactly following „my“ „instructions" :-) Ha Ha, lol awesome : .. here we go: ------ https://reviews.freebsd.org/D26493 https://reviews.freebsd.org/D26494 https://reviews.freebsd.org/D26495 https://reviews.freebsd.org/D26496 .. https://reviews.freebsd.org/rS365929 .. Regards K. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"