Subject: Re: PR 9725 (040 + pmap)
To: John Klos <john@sixgirls.org>
From: Steve Woodford <steve@mctavish.co.uk>
List: port-m68k
Date: 08/11/2001 19:47:48
On Thu, 9 Aug 2001, John Klos wrote:

> Just some info: the example code in the pr
> (http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=9725) does in
> fact crash a 68040 Macintosh, but not a 68040 nor 68060 Amiga, even when
> unlimited.

The Amiga's page size is 8KB. Given the example code from the PR, I
believe it *just* fails to tickle the `limited L2 page tables' problem
inherent in the pmap. (There are more L2 tables available with an 8KB page
size, plus each L2 table maps 64MB instead of 32MB).

Change the loop count from 64 to something like 72 and I bet the Amiga
will crash too. ;-)

Cheers, Steve