Re: [PATCH] Dynamic tick for x86 version 050609-2

[Valdis.Kletnieks@vt.edu]

On Tue, 14 Jun 2005 11:39:27 +0200, Thomas Renninger said:

> There are two ways C-state addresses are exported to OS.
> 
>      - Some flags in the FADT (-> ACPI spec) -> this gives you two C-states maximum, AFAIK.

This must be what I have, because...

>      - Through the _CST function in your DSDT (-> ACPI spec, sorry). If you have
>        have a look in dsdt.dsl at the _CST function there are that much packages returned as
>        your BIOS claims to support. Hmm, _CST code is often in the SSDT an extention
>        of the DSDT code. If you have one: acpidmp > acpidmp; acpixtract ssdt acpidmp >my_ssdt;
>        iasl -d my_ssdt.

I tried (using pmtools-20031210 and acpica-unix-20050513):

acpidmp > c840.dmp
acpixtract dsdt c840.dmp > c840.dsdt
acpixtract ssdt c840.dmp > c840.ssdt
iasl -d c840.dsdt
iasl -d c840.ssdt

No signs of a _CST in either the DSDT or SSDT (in fact, xtract ssdt got me a
zero-length file, so I suspect there's no SSDT at all in there).

Oh well.. looks like short of BIOS/DSDT hacking, I'm stuck.  At least the
dynamic tick code got some testing out of all this... ;)

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