From: Dave Hansen <haveblue@us.ibm.com>
To: Andi Kleen <ak@suse.de>
Cc: Vojtech Pavlik <vojtech@suse.cz>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
venkatesh.pallipadi@intel.com
Subject: Re: [PATCH][2.6][2/5]Support for HPET based timer
Date: 20 Aug 2003 10:09:31 -0700 [thread overview]
Message-ID: <1061399370.30807.151.camel@nighthawk> (raw)
In-Reply-To: <p731xvg7imu.fsf@oldwotan.suse.de>
On Wed, 2003-08-20 at 03:01, Andi Kleen wrote:
> Vojtech Pavlik <vojtech@suse.cz> writes:
>
> > On Tue, Aug 19, 2003 at 05:18:50PM -0700, Pallipadi, Venkatesh wrote:
> >
> > > Fixmap is for HPET memory map address access. As the timer
> > > initialization happen
> > > early in the boot sequence (before vm initialization), we need to have
> > > fixmap()
> > > and fix_to_virt() to access HPET memory map address.
> >
> > Ahh, yes, you're right. You can't use ioremap at that time. Actually I
> > did the same on x86_64 not only because of vsyscalls.
>
> iirc i386 has an ioremap_early or somesuch.
Yep, we have boot_ioremap(). It's used to do ioremap() even while we're
still using the original early boot pagetables (before paging_init()):
arch/i386/mm/boot_ioremap.c
--
Dave Hansen
haveblue@us.ibm.com
next prev parent reply other threads:[~2003-08-20 17:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <C8C38546F90ABF408A5961FC01FDBF1902C7D1C9@fmsmsx405.fm.intel.com.suse.lists.linux.kernel>
[not found] ` <20030820080513.GB17793@ucw.cz.suse.lists.linux.kernel>
2003-08-20 10:01 ` [PATCH][2.6][2/5]Support for HPET based timer Andi Kleen
2003-08-20 10:47 ` Mikael Pettersson
2003-08-20 17:09 ` Dave Hansen [this message]
2003-08-26 23:50 Pallipadi, Venkatesh
-- strict thread matches above, loose matches on Subject: below --
2003-08-26 21:43 Mikael Pettersson
2003-08-26 18:31 Pallipadi, Venkatesh
2003-08-26 18:51 ` Andrew Morton
2003-08-26 18:55 ` Andrew Morton
2003-08-26 23:20 ` john stultz
2003-08-20 17:01 Pallipadi, Venkatesh
2003-08-20 1:30 Pallipadi, Venkatesh
2003-08-20 0:18 Pallipadi, Venkatesh
2003-08-20 8:05 ` Vojtech Pavlik
[not found] <mmZK.Q4.11@gated-at.bofh.it>
2003-08-19 22:41 ` Andi Kleen
2003-08-19 19:20 Pallipadi, Venkatesh
2003-08-19 22:39 ` Vojtech Pavlik
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