linux-kernel - Re: Please teach me X86 I/O port 0x61

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Message-ID: <20100722175727.43642.qmail@web100105.mail.kks.yahoo.co.jp>
Date:	Fri, 23 Jul 2010 02:57:27 +0900 (JST)
From:	tanaka <tanaka_hideo@...oo.co.jp>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Please teach me X86 I/O port 0x61

Good evening. Dear all.

I appreciate your responses.
We use AMD CPU machine.

For example,
http://www.sun.com/servers/entry/x4100/arch-wp.pdf

In Figure 1-1 block diagram (page 10) ,
which device is mapped 0x61 address in ?

--- Randy Dunlap <randy.dunlap@...cle.com> wrote:

> On Fri, 16 Jul 2010 00:00:36 +0900 (JST) tanaka wrote:
> 
> > Dear all.
> > 
> > I investigate about  NMI kernel messages.
> > Linux kernel read 0x61 address using inb(61h).
> > 
> > I search a amd opteron cpu following manuals.
> > but I do not find  explanation of 0x61 address.
> > 
> >
>
http://support.amd.com/us/psearch/Pages/psearch.aspx?type=2.1&product=2.1.4&contentType=Tech+Doc+Processor&ostype=&keywords=&items=20
> > 
> > Could you teach me a 0x61 address of X86 arch >
> 
> Hi,
> 
> IO port 0x61 (NMI Status & Control register) is not CPU-specific on
> x86.
> It's more of a platform thing.
> 
> Intel describes it in ICH (chipset) specs, e.g., ICH7 spec,
> section 10.7.1.  Please try that and see if it answers your
> questions.
> 
> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your
> code ***
> --



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