[U-Boot] [PATCH v2] OMAP3: workaround for ARM Cortex-A8 erratum 725233

[Paulraj, Sandeep]

> 
> Siarhei Siamashka wrote:
> > 725233: PLD instructions executed with PLD data forwarding
> > enabled can result in a processor deadlock
> >
> > This deadlock can happen when NEON load instructions are used together
> > with cache preload instructions (PLD). The problematic conditions
> > can be triggered in-the-wild by NEON optimized functions from pixman
> > library (http://cgit.freedesktop.org/pixman), which perform dynamic
> > adjustment of prefetch distance.
> >
> > The workaround disables PLD data forwarding by setting PLD_FWD bit
> > in L2 Cache Auxiliary Control Register as recommended in ARM Cortex-A8
> > errata list.
> >
> > The deadlock can only happen on r1pX revisions of Cortex-A8 (used in
> > OMAP34xx/OMAP35xx). Performance impact of the workaround is practically
> > non-existant.
> >
> > Signed-off-by: Siarhei Siamashka <siarhei.siamashka at gmail.com>
> 
> Thank you for the improvements on the comment.
> Ack-ed.
Seems important to me.
I'm going to push it to u-boot-ti and send a pull request for the same

> 
> Tom