Re: [PATCH][2.6][2/5]Support for HPET based timer

[Mikael Pettersson]

Andi Kleen writes:
 > Vojtech Pavlik <vojtech@xxxxxxx> 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.
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