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

[Albert ARIBAUD]

Hello Alexander,

On Sat,  4 Jul 2015 11:48:39 +0200, Alexander Stein
<alexanders83 at 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.