From: Matt Fleming <matt@console-pimps.org>
To: Alex Thorlton <athorlton@sgi.com>
Cc: Linux EFI <linux-efi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>, Borislav Petkov <bp@suse.de>,
Russ Anderson <rja@sgi.com>
Subject: Re: [RFC] Best place/method to determine BIOS version?
Date: Wed, 11 Jun 2014 09:55:48 +0100 [thread overview]
Message-ID: <20140611085548.GB26290@console-pimps.org> (raw)
In-Reply-To: <20140609200017.GD2700@sgi.com>
On Mon, 09 Jun, at 03:00:17PM, Alex Thorlton wrote:
>
> I think the problem is that I really need to be doing this at a point
> where I can directly use physical addressing (the function pointer that
> we have stored in efi.uv_systab contains the physical address of our
> function) - at least that's the idea I get from our BIOS guys, but I
> really don't know what I'm talking about here :)
Can't you use either early_ioremap() or ioremap() (depending on when you
want to access the physical address), perhaps coupled with
efi_call_phys()?
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2014-06-11 8:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-09 20:00 Alex Thorlton
2014-06-10 8:03 ` Borislav Petkov
2014-06-10 20:44 ` efi_call on SGI Borislav Petkov
2014-06-11 17:32 ` Alex Thorlton
2014-06-11 8:55 ` Matt Fleming [this message]
2014-06-11 17:30 ` [RFC] Best place/method to determine BIOS version? Alex Thorlton
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