From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Thu, 13 Nov 2008 12:45:33 -0600
Subject: [U-Boot] [PATCH] mpc83xx: New board support SIMPC8313
In-Reply-To: <821333.7706.qm@web83504.mail.sp1.yahoo.com>
References: <821333.7706.qm@web83504.mail.sp1.yahoo.com>
Message-ID: <491C75CD.8000408@freescale.com>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Ron Madrid wrote:
>> Use raw accessors and make sure that explicit barriers are used where 
>> needed.
> 
> Is there somewhere that I can find information regarding when and where are the appropriate places are to use barriers?

Basically, you need a barrier any time ordering matters.  If access A 
needs to happen before access B, put a sync between them.

-Scott