Date: Thu, 12 Sep 1996 06:23:04 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, dyson@dyson.iquest.net Cc: current@FreeBSD.org, dg@Root.COM, kato@eclogite.eps.nagoya-u.ac.jp Subject: Re: patch for Cyrix/Ti 486SLC/DLC CPU bug Message-ID: <199609112023.GAA10051@godzilla.zeta.org.au>
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>> pmap_update_{1,2}pg(). The magic .byte's are a bad way of writing
>> `invlpg' (even gas understands this).
>>
>I don't know the syntax -- change it, and I'll propagate it!!!
Intel gives the syntax `invlpg m' where m is a memory address. This
maps nicely to gcc inline asm (I think the contstraint is "m").
I would put this in cpufunc.h since it is a single instruction and
might be useful elsewhere. Is it reasonable for device drivers to
invalidate pages directly?
Bruce
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