[coyotos-dev] Support for i486

[Valerio Bellizzomi]

On 26/11/2007, at 9.35, Jonathan S. Shapiro wrote:

>Can somebody refresh my memory on this issue?
>
>Having support for both legacy and PAE-mode mappings in our kernel
>creates a surprising amount of complexity. I am wondering why we cannot
>eliminate PTE support.

Hmm, the point is why you need to keep legacy support. I don't know about
VIA embedded. AMD Geode should support PAE, but I didn't find any
references in AMD docs.

val



>
>I know that pre-Pentium processors do not support PAE. At this point, I
>am willing to give up i486 support in order to drop support for the
>legacy mapping system.
>
>What is the story on embedded IA-32 processors? Are there any in
>widespread use that do NOT support PAE mappings? It looks to me like the
>VIA family *does* support PAE mode. Which processors do NOT, and how
>widely are they used?
>
>[ Another option would be to compile two kernels and select one
>dynamically at startup. ]
>
>shap
>
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