On Mon, Apr 4, 2016 at 6:45 PM, John Baldwin <j...@freebsd.org> wrote:
> I suspect Ryan might be referring to BARs outside of the DMAP which we > only populate to Maxmem IIRC. /dev/mem should work for those. > Unfortunately I no longer have access to the systems so I can't really confirm. I had a debug tool that attempted to read PCI device registers through /dev/mem, and on these systems (which were running a 8.2 derivative) the reads from /dev/mem failed with some kind of error. The one detail that I do remember is that the errors started happening after we enabled the use of 64-bit BARs in the BIOS and the addresses assigned to the BARs were quite large -- I believe well beyond the bounds of real memory. _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
