From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tom <Tom.Rix@windriver.com>
Date: Tue, 23 Feb 2010 12:39:17 -0600
Subject: [U-Boot] [PATCH v2] OMAP3: workaround for ARM Cortex-A8 erratum
 725233
In-Reply-To: <1266791874-7753-1-git-send-email-siarhei.siamashka@gmail.com>
References: <1266791874-7753-1-git-send-email-siarhei.siamashka@gmail.com>
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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@gmail.com>

Thank you for the improvements on the comment.
Ack-ed.

Tom