bootstd: CACHE Misaligned operation errors (Marvell Armada 385)

[Simon Glass]

Hi Tom,

On Wed, 13 Sept 2023 at 14:14, Tom Rini <trini at konsulko.com> wrote:
>
> On Wed, Sep 13, 2023 at 12:56:53PM -0700, Tony Dinh wrote:
> > Hi Tom,
> >
> > On Wed, Sep 13, 2023 at 9:22 AM Tom Rini <trini at konsulko.com> wrote:
> > >
> > > On Tue, Sep 12, 2023 at 12:38:00PM -0700, Tony Dinh wrote:
> > >
> > > > I've been testing the boostd for a few Marvell boards and seeing
this
> > > > error on the Thecus N2350 (Marvell Armada 385, dual-core CPU). The
> > > > "bootflow scan scsi" command triggered the "CACHE: Misaligned
> > > > operation at range" error. However, this error did not affect the
> > > > result of the scan, i.e. the bootflow for scsi partition was created
> > > > correctly, and u-boot is running normally.
> > > >
> > > > Enabling CONFIG_SYS_DCACHE_OFF got rid of the errors altogether.
> > > > Perhaps this is a case where the DCACHE is not required and should
be
> > > > turned off?
> > > >
> > > > Please see the log after the break below.
> > >
> > > Can you please try -next ?  There's at least one SCSI related cache
> > > alignment fix there that's not in master, thanks.
> >
> > Unfortunately I got the same errors. This time the ranges are
> > different, of course.
> >
> > master:
> >
> > N2350 > bootflow scan scsi
> > CACHE: Misaligned operation at range [3fb99f88, 3fb9a388]
> > CACHE: Misaligned operation at range [3fb99f88, 3fb9a388]
> > CACHE: Misaligned operation at range [3fb99f88, 3fb9a388]
> > ERROR: v7_outer_cache_inval_range - start address is not aligned -
0x3fb99f88
> > ERROR: v7_outer_cache_inval_range - stop address is not aligned -
0x3fb9a388
> >
> > next:
> >
> > N2350 > bootflow scan scsi
> > CACHE: Misaligned operation at range [3fb80388, 3fb80788]
> > CACHE: Misaligned operation at range [3fb80388, 3fb80788]
> > CACHE: Misaligned operation at range [3fb80388, 3fb80788]
> > ERROR: v7_outer_cache_inval_range - start address is not aligned -
0x3fb80388
> > ERROR: v7_outer_cache_inval_range - stop address is not aligned -
0x3fb80788
>
> Can you debug to where these calls are so we can align these buffers?
> See 02660defdc8a ("scsi: Cache align temporary buffer") for an example.

I wonder if we need to use memalign() when allocating memory to read things
from the media? But I am not sure which file time is being read, or which
bootmeth it is.

Regards,
Simon