Messages in this thread | | | Subject | Re: [PATCH][2.6][2/5]Support for HPET based timer | From | Dave Hansen <> | Date | 20 Aug 2003 10:09:31 -0700 |
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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
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