[U-Boot] [PATCH 0/5] dcache support for Raspberry Pi 1

Albert ARIBAUD
2015-07-06T07:39:40Z

Hello Alexander,

On Sat, 4 Jul 2015 11:48:39 +0200, Alexander Stein
<alexanders83@web.de> wrote:

> dcache supprt increases the MMC read performance on RPI 1 from 5,4 MiB/s to
> 12.3 MiB/s. It doesn't seem to have any affect on RPI 2 though. I just get
> error messages about non-cacheline aligned address upon invalidation.

Could it be that code needed to support dcache is not the same for
rpi_2's bcm2836 than it is for rpi's bcm2835?

Anyway: if code properly handles unaligned addresses then it should not
throw an error message about it. Can you look into why the error is
thrown?

> The performance stucks at 1.2 MiB/s.
>
> This was tested by the following command:
> > fatload mmc 0:1 ${kernel_addr_r} zImage
>
> Alexander Stein (5):
> arm1176/cpu: Match cache_flush to arm1136
> arm1176/cpu: Add icache and dcache support
> arm1176/cpu: Align cache flushing addresses to cacheline size
> arm/mach-bcm283x/mbox: Flush and invalidate dcache when using fw
> mailbox
> arm/rpi: Enable dcache
>
> arch/arm/cpu/arm1176/cpu.c | 114 +++++++++++++++++++++++++++++++++++++++++--
> arch/arm/mach-bcm283x/mbox.c | 6 +++
> include/configs/rpi-common.h | 1 -
> 3 files changed, 116 insertions(+), 5 deletions(-)
>
> --
> 2.4.5
>

Amicalement,
--
Albert.