On 1 Oct 2014, at 14:33, Adrian Chadd <adrian_at_freebsd.org> wrote: > There's also something for XHCI. So I see.. Section 7.6 in here has details.. http://www.intel.com.au/content/dam/www/public/us/en/documents/technical-specifications/extensible-host-controler-interface-usb-xhci.pdf Interestingly unlike the EHCI version it does not require hardware between the debugger and debugee, only a special cable. (see http://msdn.microsoft.com/en-us/library/windows/hardware/hh439372(v=vs.85).aspx) A quick search shows the cable is pretty cheap ($15 for a short one) > Please please write it for freebsd. :) Not sure I have the cycles :( > > -a > > > On 30 September 2014 21:45, O'Connor, Daniel <Daniel.O'Connor_at_emc.com> wrote: >> >> On 1 Oct 2014, at 0:14, Julian Elischer <julian_at_freebsd.org> wrote: >>> Unfortunately you can't use a USB serial as it requires the USB stack >>> be working before it can be used.. >>> similar with ethernet connected debugging which requires that the >>> driver for the ethernet hardware support it. >>> (which why we don't have it in the tree though it has been done >>> several times in the past). >> >> There IS a USB debug standard, Linux has some code to support it. >> >> I am not sure what percentage of hardware has it hooked up though (the host controller has a designated debug port but it could physically be anything). >> >> http://www.coreboot.org/EHCI_Debug_Port >> >> The hardware is bit more expensive than a null modem or firewire cable though :( >> >> Regards, >> Daniel O’Connor >> >> Senior Software Engineer >> Isilon Platforms Team >> >> >> >> _______________________________________________ >> freebsd-current_at_freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" Regards, Daniel O’Connor Senior Software Engineer Isilon Platforms TeamReceived on Wed Oct 01 2014 - 04:25:15 UTC
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