From: Ralf Baechle <ralf@oss.sgi.com>
To: Atsushi Nemoto <nemoto@toshiba-tops.co.jp>
Cc: linux-mips@oss.sgi.com
Subject: Re: new asm-mips/io.h
Date: Wed, 28 Nov 2001 01:19:07 +1100 [thread overview]
Message-ID: <20011128011907.A5508@dea.linux-mips.net> (raw)
In-Reply-To: <20011127.191022.27957874.nemoto@toshiba-tops.co.jp>; from nemoto@toshiba-tops.co.jp on Tue, Nov 27, 2001 at 07:10:22PM +0900
On Tue, Nov 27, 2001 at 07:10:22PM +0900, Atsushi Nemoto wrote:
> ralf> Well, talk to it's developers before it's too late. Or as it
> ralf> has already happened for some hardware I think we should simply
> ralf> go with your suggestion and make all those functions vectors.
>
> For me, currently it happens only in big endian and I can live happy
> in a little endian world. I will create new patch when I REALLY need
> it. Thank you.
Right now the Linux philosophy is that we don't provide any swapping
facility for I/O port accesses. Some hardware supports byteswapping for I/O
port and memory access, others must do that in software't, so big endian
systems can set CONFIG_SWAP_IO_SPACE to enable swapping for I/O ports and
memory. In the past there has been quite some confusion about this and
how to use this properly in drivers ...
Ralf
next prev parent reply other threads:[~2001-11-27 15:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-26 3:35 new asm-mips/io.h Atsushi Nemoto
2001-11-26 9:09 ` Ralf Baechle
2001-11-27 4:04 ` Atsushi Nemoto
2001-11-27 7:06 ` Ralf Baechle
2001-11-27 10:10 ` Atsushi Nemoto
2001-11-27 14:19 ` Ralf Baechle [this message]
2001-11-27 17:44 ` Jun Sun
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