From: Jiri Slaby <jirislaby@gmail.com>
To: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: [QUESTION] outl and writel endianity
Date: Thu, 08 Mar 2007 17:38:22 +0100 [thread overview]
Message-ID: <45F03BFE.5060406@gmail.com> (raw)
Hi.
If I use outl everything seems to be OK. Is there any difference in endianity
between outl and writel (or iowrite32, which calls writel, I guess).
When I do
outl(val, p->ibase + 4*off);
everyhting is OK, but when I do
writel(val, p->iaddr + off);
bad value is written unless I use cpu_to_be32(val) (or swap32).
this is what p struct contains:
u32 __iomem *iaddr;
unsigned long ibase;
and this, how it is initialized:
p->ibase = pci_resource_start(pdev, 2);
p->iaddr = pci_iomap(pdev, 2, 0);
What's the proper use of this? iowrite32be seems to work too.
thanks,
--
http://www.fi.muni.cz/~xslaby/ Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
reply other threads:[~2007-03-08 16:39 UTC|newest]
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