On Mon, 25 Oct 1999 18:34:45 +0900 (JST) 
 nisimura@itc.aist-nara.ac.jp (Toru Nishimura) wrote:

 > Now, is it possible to mmap the whole framebuffer segment in a single
 > TLB?  Alpha processor allows to have 'fat TLBs' as MIPS R4000.  It
 > would bring big saving for Xserver, won't it?

Yes, there's a "granularity hint" bit in the PTE that the PALcode can use
to install Fat TLB Entries.

However, there's not really a good interface between the VM system and
the pmap and device driver to take advantage of it.  It's all still done
one page at a time.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>