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: Mon, 26 Nov 2001 20:09:46 +1100 [thread overview]
Message-ID: <20011126200946.A8408@dea.linux-mips.net> (raw)
In-Reply-To: <20011126.123545.41627333.nemoto@toshiba-tops.co.jp>; from nemoto@toshiba-tops.co.jp on Mon, Nov 26, 2001 at 12:35:45PM +0900
On Mon, Nov 26, 2001 at 12:35:45PM +0900, Atsushi Nemoto wrote:
> A last cleanups for io.h looks bit wrong. Please apply.
Yes, the byteswapping stuff (CONFIG_SWAP_IO_SPACE) also got lost.
> By the way, I have some boards which require special I/O routines.
> Some of these boards need byteswap on PCI I/O region but noswap on ISA
> region. And some of these boards do not require byteswap but need
> swap the address ('port' values). I added following codes to support
> these boards. Is it worth to apply?
Not as is - the kernel has changed, so your patch wouldn't apply anymore.
Aside of that I don't think we'll have any alternative to do something
along the lines of your patch. There are for example systems where the
high 8 bits of the I/O or memory address on the ISA bus are supplied in
a separate register of the chipset, not as part of the memory address
itself. It's really remarkable how much bad taste some hardware designers
have ...
Ralf
next prev parent reply other threads:[~2001-11-26 10:09 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 [this message]
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
2001-11-27 17:44 ` Jun Sun
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