[U-Boot] [Patch v4 2/5] ARMv8: Adjust MMU setup

York Sun
2014-06-06T20:17:32Z

On 06/06/2014 10:32 AM, Mark Rutland wrote:
>>> How is TCR_EL2.SH0 (or TCR_EL1.SH*) configured?
>>>
>>> You'll only need to flush the cache if they're configured non shareable.
>>
>> It is configured as non shareable.
>
> Is there any reason not to configure them as inner shareable? That way
> the MMU will look in the D-cache, and you won't have to spend time
> flushing them.
>

Mark,

I appreciate the reminder. I tried on our emulator. With inner share set for TCR
SH0 bits, u-boot works with the flushing, but doesn't work without flushing. It
went to exception.

Can you share more information about the inner share? I need to follow up with
our designer to confirm.

York