From: "H. Peter Anvin" <hpa@zytor.com>
To: Rene Herman <rene.herman@keyaccess.nl>
Cc: 7eggert@gmx.de, Bjorn Helgaas <bjorn.helgaas@hp.com>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
Russell King <rmk+serial@arm.linux.org.uk>,
Jeff Garzik <jeff@garzik.org>,
Andrew Morton <akpm@linux-foundation.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [patch 2/2] 8250_pnp: register x86 COM ports at the conventional ttyS names
Date: Fri, 18 Jan 2008 13:10:29 -0500 [thread overview]
Message-ID: <4790EB95.203@zytor.com> (raw)
In-Reply-To: <478E946D.9040105@keyaccess.nl>
Rene Herman wrote:
>
> The number of places expected to contain something sensible should I
> believe first be verified at 0x410 -- the equipment word. Bits 11-9
> (0x0e00) should be the number of serial ports, 0 to 4 (so 5-7 is also a
> sanity check) and if BIOSes can be expected to zero out the non-used
> base-addresses (at 0x400, 0x402, 0x404, 0x406) that's another sanity
> check. Don't know if they can though...
>
Probably not. However, the ports marked valid should be nonzero and
aligned-8.
-hpa
next prev parent reply other threads:[~2008-01-18 18:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <9MjWa-VI-9@gated-at.bofh.it>
[not found] ` <9MjWb-VI-11@gated-at.bofh.it>
[not found] ` <9MlEG-3Mx-13@gated-at.bofh.it>
[not found] ` <9Mmra-56f-29@gated-at.bofh.it>
2008-01-16 20:33 ` [patch 2/2] 8250_pnp: register x86 COM ports at the conventional ttyS names Bodo Eggert
2008-01-16 20:42 ` H. Peter Anvin
2008-01-16 23:34 ` Rene Herman
2008-01-18 18:10 ` H. Peter Anvin [this message]
2008-01-16 17:05 [patch 0/2] serial: explicitly request ttyS0-3 for COM1-4 Bjorn Helgaas
2008-01-16 17:05 ` [patch 2/2] 8250_pnp: register x86 COM ports at the conventional ttyS names Bjorn Helgaas
2008-01-16 18:42 ` Russell King
2008-01-16 18:44 ` H. Peter Anvin
2008-01-16 19:47 ` Bjorn Helgaas
2008-01-16 19:49 ` H. Peter Anvin
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