|
 |
Le 06/11/2012 14:33, Warp a écrit :
> clipka <ano### [at] anonymous org> wrote:
>> The APs enter Halt state, so to wake them up you trigger whatever event
>> gets a CPU out of Halt... Interrupt, maybe? You COULD possibly read up
>> on it in the System Programmer's Guide; see the link I posted.
>
> So far what I have gathered is this:
>
> The correct answer depends on the processor architecture, of course, but
> for example in most Intel-based architectures there's a physical controller
> chip named APIC (Advanced Programmable Interrupt Controller) that's used
> for, among other things, wake up additional processors/cores and make them
> run specified code.
>
> What I still can't figure out is how exactly you tell the APIC to do that.
>
Probably like with any other controller: read & write operation to its
'magical' locations (so, load & store in assembly...)
From page 7, it seems the APIC registers are in a 4K-byte page....
>
http://www.intel.com/content/dam/doc/specification-update/64-architecture-x2apic-specification.pdf
Post a reply to this message
|
|
