Thomas De Schampheleire writes: > No, I am not designing a CPU. What I am doing is a research project, in > which I will attempt to implement adaptive shutdown of processors in > OpenSolaris. I think I will try to use a simple module, which can possibly > use register_cpu_setup_func() to register a callback upon external cpu > transitions.
Ah, ok. I think if I were doing this, I'd just modify one of the existing CPU modules in ON, rather than trying to create a separate module that must be loaded very early during boot. > However such DR things will not be done in our experimental > setup, so I think they will not even be necessary (unless to be more > general). > > Do you have any idea whether SPARC processors implement low-power states, > just like x86 does? Is ACPI also used for this? I had thought ACPI was an Intel invention, so I'd expect the answer to that second question to be "no." As for the first question, I'm no SPARC CPU expert. You'll probably want to hit the SPARC databooks for that. (My guess would be that it has its own power-management architecture, and that the existing code already supports those functions. This sort of thing was done long ago, before x86 ...) -- James Carlson, Solaris Networking <[EMAIL PROTECTED]> Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084 MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677 _______________________________________________ opensolaris-code mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
