Re: [odin-os-devel] Drivers

[Chris R. <chr...@br...>]

ai...@li... wrote:
> 
> Yet more Q:
> When ATA driver resets the interface it should poll it for positive status
> for 31 seconds. There is no interrupt at the end of reset.
> Stupid endless reading of status register until timeout expires seems bad
> implementation for me, because lagre amount of CPU time (up to 31 second! )
> will be wasted on execution of high-priority thread.
> Is there any good way to implement this?

Why not take a simple aproach;

init ATA
sleep(31)
check status register.


> Maybe driver initialization thread can lower its priority and enter this
> loop, then restore priority at the end? This way we can save some CPU time
> (not a big gain, but it's better than nothing).
> 
> Any ideas on this are welcome.
>         Igor

-- 
Chris.