[U-Boot] [PATCH RESEND v2] armv7: Disable D cache for goni target (s5p)

[Linus Walleij]

On Thu, Jul 28, 2011 at 7:04 AM, Minkyu Kang <promsoft at gmail.com> wrote:
> Dear Linus Walleij,
>
> On 18 July 2011 19:35, Linus Walleij <linus.walleij at linaro.org> wrote:
>> On Mon, Jul 18, 2011 at 9:23 AM, Lukasz Majewski <l.majewski at samsung.com> wrote:
>>
>>> Disable D cache for goni target (s5p) - rationale:
>>>
>>> 1. Before change introduced in commit
>>> SHA1:c2dd0d45540397704de9b13287417d21049d34c6 the D-cache for
>>> GONI target was disabled. This change was supposed to
>>> preserve this state.
>>
>> I had exactly the same rationale for disabling cache on the Integrator - it
>> used to be off now it's default on and doesn't work - but that patch was
>> NAK:ed by Wolfgang.
>>
>
> Could you please give me the link of that thread?

Me:
http://marc.info/?l=u-boot&m=131066804010454&w=2

Wolfgang:
http://marc.info/?l=u-boot&m=131066501332302&w=2

AFAICT the idea is that it should be possible to turn D-cache
off, we have to fix it if it doesn't work. Alternatively I have to
prove that the D-cache on the ARM920T cannot be safely
turned off at all, i.e. if it requires that the CP15 operation be
done from an onchip memory or something like that.

Anyone knows, by the way? I've really tried hard to fix this
and so far gotten nowhere.

Thanks,
Linus Walleij