From: Scott Wood <scottwood@freescale.com>
To: Yoni Levin <yoni.l@slyde-tech.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: how the bytes ordered in mpc8313
Date: Wed, 08 Aug 2007 11:55:22 -0500 [thread overview]
Message-ID: <46B9F57A.9070604@freescale.com> (raw)
In-Reply-To: <CE785D12544843B49C5D1315CAE61C23.MAI@mail.livedns.co.il>
Yoni Levin wrote:
> I have mpc83xx,
>
> I saw that I need to use swab32 to any read\write operation from registers,
BTW, you should be using in/out_le32() (or for PCI MMIO, readl/writel)
rather than swab32(). This will be more efficient since it can use the
lwbrx/stwbrx instructions, and it will keep working even if the code is
run little-endian.
-Scott
prev parent reply other threads:[~2007-08-08 16:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-08 15:26 how the bytes ordered in mpc8313 Yoni Levin
2007-08-08 16:49 ` Scott Wood
2007-08-08 16:55 ` Scott Wood [this message]
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