From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] endian issue
Date: Sat, 15 May 2010 18:33:21 +0200 [thread overview]
Message-ID: <20100515183321.34ffff64@surf> (raw)
In-Reply-To: <201005151726.58323.korgull@home.nl>
On Sat, 15 May 2010 17:26:57 +0200
Marcel <korgull@home.nl> wrote:
> If I wish to do that, how do I detect the endianness of a sytem and
> do I need to reformat my data in my drivers for this ? If so, isn't
> that a pure waste of cpu cycles for the sake of reusable code ?
> If I can do this without any speed sacrifice than I will do it, if
> not....than it's simply not an option for this system.
If your driver is in the kernel, tust use the kernel functions
be16_to_cpu(), be32_to_cpu(), etc. They will automatically do the
appropriate conversion depending on the CPU endianess.
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2010-05-15 16:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-15 13:47 [Buildroot] endian issue Marcel
2010-05-15 14:09 ` Grant Edwards
2010-05-15 14:19 ` Lionel Landwerlin
2010-05-15 14:43 ` Grant Edwards
2010-05-15 15:26 ` Marcel
2010-05-15 16:33 ` Thomas Petazzoni [this message]
2010-05-15 16:37 ` Lionel Landwerlin
2010-05-15 16:45 ` Grant Edwards
2010-05-15 17:53 ` Marcel
2010-05-15 15:18 ` Marcel
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