Messages in this thread | | | Subject | RE: [PATCH][2.6][2/5]Support for HPET based timer | Date | Wed, 20 Aug 2003 10:01:53 -0700 | From | "Pallipadi, Venkatesh" <> |
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Yes. I hadn't thought about early_ioremap option. There seems to be multiple ways of doing early ioremap: bt_ioremap() and boot_ioremap(). I will look at them closer and work on changing HPET code to use one of these in place of fixmap.
Thanks, -Venkatesh
> -----Original Message----- > From: Mikael Pettersson [mailto:mikpe@csd.uu.se] > Sent: Wednesday, August 20, 2003 3:47 AM > To: Andi Kleen > Cc: Vojtech Pavlik; linux-kernel@vger.kernel.org; Pallipadi, Venkatesh > Subject: Re: [PATCH][2.6][2/5]Support for HPET based timer > > > Andi Kleen writes: > > 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. > > bt_ioremap(). I wrote it to support early DMI scan so DMI data > could be used to blacklist BIOSen that break local APICs. > This was done pretty much just to handle Dell laptops. > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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