[U-Boot] [PATCH 1/2 V2] arm926: Flush the data cache before disabling it.

Aneesh V
2012-01-19T11:54:45Z

On Thursday 19 January 2012 05:00 PM, Christian Riesch wrote:
> Hi Aneesh,
>
> On Thu, Jan 19, 2012 at 11:17 AM, Aneesh V<aneesh@ti.com> wrote:
>> On Thursday 19 January 2012 12:23 PM, Sughosh Ganu wrote:
>>> Tried a few things on my end.
>>> * Read the D-cache value in the spl, and confirmed that the data
>>> cache is indeed not enabled.
>> What is the value of the B bit in CP15 SCR register? I wonder if RBL is
>> doing all the IMB operations required after copying the SPL image and
>> before executing it. IMB is required for consistency between data and
>> instruction sides.
>
> Only if caches are used, right? Or also without caches?
> Tom wrote that RBL does not turn on cache.
> Regards, Christian

Only D-cache seems to be disabled in this case. I-cache and Write
buffer are likely to be enabled. If so, all the IMB operations except
the data-cache flushing are still relevant.

br,
Aneesh