dm: crash for DM_FLAG_PRE_RELOC

[Simon Glass]

Hi Heinrich,

On Wed, 15 Apr 2020 at 12:33, Fabio Estevam <festevam at gmail.com> wrote:
>
> Changing Ruchika's address to the NXP one.
>
> On Wed, Apr 15, 2020 at 3:28 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
> >
> > Hello Simon,
> >
> > I try to boot pine64-lts_defconfig + CONFIG_RSA=y.
> >
> > SPL loads BL31. BL31 starts U-Boot. But before any output appears SPL is
> > restarted. So some crash must occur.
> >
> > If I remove the flag DM_FLAG_PRE_RELOC in
> > drivers/crypto/rsa_mod_exp/mod_exp_sw.c, booting works fine.
> >
> > Assigning the driver to UCLASS_NOP does not resolve the problem. So it
> > seems not to be a problem with the u-class.
> >
> > Enlarging CONFIG_SPL_SYS_MALLOC_F_LEN and CONFIG_SYS_MALLOC_F_LEN does
> > not resolve the problem.
> >
> > As the failure occurs very early no console is available for debug
> > output. Defining LOG_DEBUG at the top of drivers/core/list.c provides no
> > output.
> >
> > Do you have an idea how to identify the root cause of the problem?
> >
> > @Ruchika
> > Why is this driver loaded before relocation? I cannot find any usage of
> > function rsa_verify_key() before relocation.
> >

I suppose a JTAG debugger would be best. But failing that you can
enable the debug UART. It should make printf(), etc. work very early.
If not, try printch() etc, to figure out why.

Regards,
SImon