[PATCH 29/29] bloblist: Allow relocation at the end of the SPL phase

[Simon Glass]

Hi Tom,

On Wed, 5 Feb 2025 at 06:52, Tom Rini <trini at konsulko.com> wrote:
>
> On Tue, Feb 04, 2025 at 06:55:19PM -0700, Simon Glass wrote:
>
> > Where the bloblist is located in internal memory and TF-A's BL31 blob
> > removes access to this memory, the best option seems to be to relocate
> > the bloblist just before running TF-A.
> >
> > Add an option to select this behaviour and provide a relocation address.
> >
> > Signed-off-by: Simon Glass <sjg at chromium.org>
> > ---
> >
> >  common/Kconfig    | 20 ++++++++++++++++++++
> >  common/bloblist.c | 15 ++++++++++++++-
> >  common/spl/spl.c  |  9 +++++++++
> >  3 files changed, 43 insertions(+), 1 deletion(-)
> >
> > diff --git a/common/Kconfig b/common/Kconfig
> > index 0e8c44f3f74..962e7fd76eb 100644
> > --- a/common/Kconfig
> > +++ b/common/Kconfig
> > @@ -1125,6 +1125,26 @@ config SPL_BLOBLIST_ALLOC
> >
> >  endchoice
> >
> > +config SPL_BLOBLIST_RELOC
> > +     bool "Relocate the bloblist before existing SPL"
> > +     depends on BLOBLIST_FIXED
> > +     help
> > +       Some platforms locate the bloblist in SRAM in SPL. In some cases,
> > +       the TF-A BL31 blob removes access to SRAM, e.g. with Rockchip RK3399.
> > +
> > +       Enable this option to make U-Boot copy the bloblist from SRAM to SDRAM
> > +       before leaving SPL.
>
> Isn't this because TF-A is (re?-)initializing SDRAM? I'll let one of the
> Rockchip people chime in here, thanks.

Not so far as I know. The DRAM init is in U-Boot on this platform.

Regards,
SImon