use invd instead of wbinvd in real mode start code

Andy Shevchenko andy.shevchenko at
Tue Feb 18 11:45:03 CET 2020

On Tue, Feb 18, 2020 at 7:48 AM Heiko Schocher <hs at> wrote:
> Am 17.02.2020 um 17:04 schrieb Wolfgang Denk:
> > In message <CAHp75VfuzMm=CPJ86GspRiiv+AAYbs+jFDKP2rfNmYhsmvOY+w at> you wrote:
> >> On Mon, Feb 17, 2020 at 5:09 PM Wolfgang Denk <wd at> wrote:
> >>> In message <CAHp75VdUY7zJfkc4YV-KTt1aEKg9Ggy6PsJAEOkgo9eCtQx9Kg at> you wrote:
> >>>>
> >>>>>> git bisect is the usual way to figure out the culprit.
> >>>>>
> >>>>> Too much work to do this way.
> >>>
> >>> If you find bisecting is too much work you probably still do it
> >>> manually. Why don't you use  tbot  to automize such boring and time
> >>> consuming tasks?
> >>
> >> Bisection time something about 10%, while 90% is flashing the board
> >> and, given the result, triggering either bad or good next cycle.
> >
> > Yes, and this is exactly what tbot was made for - automating such
> > repeating, boring activities.  It is wasted life time to do this
> > manually.
> Yes, that is one benefit if you use tbot, see git bisect help:
> You only have to pass to the function the good commit as string and
> a tbot python function which tests the current commit. This test
> function now can call other functions like run a complete build of
> current source, copy the resulting images let say to a tftp directory,
> install the new images on the device, reboot it and run tests on the U-Boot
> comamndline on the real board ...
> So using tbot for the complete development process makes a lot of sense,
> also as you have at the end a complete setup for testing your board (not
> only U-Boot also linux or other commandline based machines are possible
> to automate), it is easy to start a CI ... as tbot is a commandline tool
> a simple cron job is enough .. or you can integrate it easily into jenkins,
> buildbot, gitlab CI runner ... whatever CI you use...
> If you want to get help setting up tbot, feel free to ask me or Harald
> directly or on the tbot mailinglist:

How the feed back line is organized? I mean how host system will know that
 a) we done flash correctly?
 b) the booted image is bad or good?

With Best Regards,
Andy Shevchenko

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