[AArch64] Workaround for cortex-a53 erratum 843419

[Marcus Shawcroft]

On 29 April 2015 at 21:12, Christophe Lyon <christophe.lyon@linaro.org> wrote:
> On 1 April 2015 at 14:17, Marcus Shawcroft <marcus.shawcroft@gmail.com> wrote:
>> On 30 March 2015 at 15:23, Marcus Shawcroft <marcus.shawcroft@arm.com> wrote:
>>> Hi,
>>>
>>> Some early revisions of the Cortex-A53 have an erratum (843419).  The
>>> details of the erratum are quite complex and involve dynamic conditions.
>>> For the purposes of the workaround we have simplified the static conditions
>>> to an ADRP in the last two instructions of a 4KByte page, followed within
>>> four instructions by a load/store dependent on the ADRP.
>>
>> Committed.
>>
>
> Hi Marcus,
>
> Do you have any plan to submit a GCC patch adding a configure option +
> spec file entry to activate this workaround by default, as you did
> previously for erratum 835769?

We don;t have such a patch in progress. /Marcus