Subject: Re: pmap_enter() bashed
To: Charles M. Hannum <email@example.com>
From: Eduardo E. Horvath <firstname.lastname@example.org>
Date: 03/26/1999 20:44:44
On Fri, 26 Mar 1999, Charles M. Hannum wrote:
> There are two different reasons why we map pages:
I got that part
> We don't want to take another fault just for R/M bit emulation;
> this is a complete waste of time. So, the `access_type' serves to
> pass the information originally from the fault handler about the
> nature of the attempted access back from the VM system to the pmap,
> so that the pmap can preset the emulated R/M bits and avoid causing
> a second fault.
So if you and `access_type' with `prot' that's the protection you should
set on the page right now? I'm trying to ge a handle on how to implement
> I believe both SPARC platforms have hardware R/M bits, so there isn't
> much need for any change there.
Not all models.
Eduardo Horvath email@example.com
"I need to find a pithy new quote." -- me