Messages in this thread | | | Date | Tue, 4 Oct 2005 21:02:10 +0900 | From | Tejun Heo <> | Subject | Re: Question regarding x86_64 __PHYSICAL_MASK_SHIFT |
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Sorry, corrections.
On Tue, Oct 04, 2005 at 08:59:48PM +0900, Tejun Heo wrote: > > Hello, Andi. > > In include/asm-x86_64/page.h, __VIRTUAL_MASK_SHIFT is defined as 48 > bits which is the size of virtual address space on current x86_64 > machines as used as such. OTOH, __PHYSICAL_MASK_SHIFT is defined as 46 and used as such. > and used as mask shift for physical page address (i.e. physaddr >> 12). physical page number (i.e. physaddr >> 12).
Sorry about extra noise, I gotta eat something, feeling dizzy. :-)
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