[U-Boot] [PATCH v4 0/6] Enable Thumb build for ARM platforms

Wolfgang Denk wd at denx.de
Thu Mar 15 22:01:50 CET 2012

Dear Tom Rini,

In message <CA+M6bXkBodKLkkqFseqo=BeNuL62W-MUSgsTEYgV4WLEvf1GtA at mail.gmail.com> you wrote:
> > I don't consider it a big problem (just a bit sad) if  ELDK 4.2 cannot
> > be used for building these.  However, I think it is not acceptable
> > tobuild known-to-be-broken images.  If the tool chain is too old, this
> > shall result in a clear error message and abort of the build.
> Is an #error in a common omap4/5 file sufficient or does it need to be
> sooner than that?

If it can be tested there, it can probably also tested before we start
building at all?

> > Why is thumb mode needed for these boards?  Just because of image
> > size?
> Basically, yes.  Without thumb mode we're very close (and sometimes
> spilling over) the size limit.  Thumb takes us away from that and is a
> small speed increase (due to smaller sized files).

size limit means size limit for the SPL due to limitations of the ROM
boot loader resp. the available RAM size?

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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