Subject: Re: TGA and NetBSD/alpha
To: Toru Nishimura <email@example.com>
From: Jason Thorpe <firstname.lastname@example.org>
Date: 10/25/1999 09:26:47
On Mon, 25 Oct 1999 18:34:45 +0900 (JST)
email@example.com (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 <firstname.lastname@example.org>