On Mon, 25 Jul 2016, Stefano Babic wrote:
> Hi Robert,
>
> On 25/07/2016 12:42, Robert P. J. Day wrote:
> > p.s. i also noticed a few boards in u-boot that explicitly work with
> > "partition sets":
>
> Do not let be confused by digging the environment into U-Boot. There are
> much more boards as you can discover. In fact, you can see the "default"
> environment, but on many boards the right environment is loaded in
> factory as part of device tests. The default environment, linked with
> u-boot, is not so important for many products.
>
> It is also possible that what you are seeing here is not used at all
> later, and replaced with some other scripts.
>
> Best regards,
> Stefano Babic
>
> >
> > $ grep -r partitionset *
> > board/siemens/taurus/taurus.c: char *partitionset_active = NULL;
> > board/siemens/taurus/taurus.c: partitionset_active =
> > getenv("partitionset_active");
> > board/siemens/taurus/taurus.c: if (partitionset_active) {
> > board/siemens/taurus/taurus.c: if (partitionset_active[0] ==
> > 'A')
> > board/siemens/taurus/taurus.c:
> > setenv("partitionset_active", "B");
> > board/siemens/taurus/taurus.c:
> > setenv("partitionset_active", "A");
> > board/siemens/taurus/taurus.c: printf("partitionset_active
> > missing.\n");
> > include/configs/etamin.h: "setenv ${partitionset_active} true;" \
> > include/configs/siemens-am33x-common.h: "setenv
> > ${partitionset_active} true;" \
> > include/configs/siemens-am33x-common.h:
> > "setenv partitionset_active B; " \
> > include/configs/siemens-am33x-common.h:
> > "setenv partitionset_active A; " \
> > include/configs/siemens-am33x-common.h: "echo set
> > ${partitionset_active}...;" \
> > include/configs/siemens-am33x-common.h: "partitionset_active=A\0" \
> > include/configs/siemens-am33x-common.h: "echo Set
> > partitionset_active variable to 'A' " \
> > include/configs/siemens-am33x-common.h: "setenv
> > ${partitionset_active} true;" \
> > include/configs/siemens-am33x-common.h: "setenv
> > ${partitionset_active} true;" \
> > include/configs/taurus.h: "partitionset_active=A\0"
> > $
oh, i understand that, i was just noting another component that can
come into play if someone *wants* to do it as is being done above,
unless it's overridden at the factory.
a couple more bootlimit/autoboot questions coming later as i try to
pull all this together and finish writing it up, so others don't have
to do as much reading as me. :-)
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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