[U-Boot] Switching CPU between SPL and non-SPL build
Allen Martin
amartin at nvidia.com
Tue Apr 17 08:46:59 CEST 2012
Changing the subject line since this thread isn't really about
toolchains any more.
> > The problem I'm having with the SPL build is that a single entry in
> > boards.cfg can have exactly one architecture and CPU model. So
>
> But you can define any tye of CONFIG_ settings, both in boards.cfg and
> in your board config file.
>
> > there's no easy way to have the SPL build compile from arm720t and
> > the non SPL build compile from armv7. So I either have to have two
>
> What would prevent you from extending the Makefiles to set build
> options depending on CONFIG_ settings from your board configuration?
What I really need is the ability to change "CPU" between SPL and non
SPL build. This gets set too early for the board config file to
override. What I really need is something like this in the generated
include/config.mk:
ARCH = arm
ifeq ($(CONFIG_SPL_BUILD),y)
CPU = arm720t
else
CPU = armv7
endif
BOARD = seaboard
VENDOR = nvidia
SOC = tegra2
As an experiment I tried this, and it seems to do what I want. I
don't see a clean way to do this without it being a hack or really
intrusive though.
-Allen
nvpublic
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