Re: [PATCH] Fix i486 suspend to disk CR4 oops

[Maciej W. Rozycki]

On Mon, 18 Aug 2008, David Fries wrote:

> That's what I get for reading the Intel instruction set reference,
> "The CR4 register was added to the Intel Architecture beginning with
> the Pentium processor."

 Indeed.  It started with the Pentium and some of the i486
models/steppings that were released after the Pentium got the CR4 register
implemented too.  These include at the least the write-back enhanced 
versions of the iDX2 and iDX4 processors as well later steppings of the 
i486SX, which I encountered myself.  There could be others -- iSX2?

 Unfortunately as usually with Intel you have to read all the documents
they release to hope to get a full image and even then you'll probably
come out confused and with bits of data missing -- if in doubt, check the
silicon: it has the most definite information.  However these additions
were actually documented quite well in the respective i486-class processor
datasheets -- IIRC Intel have released a combined version at one point.  
I am not sure whether it has ever been available on-line.

  Maciej
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/