Re: Irq priorities

[Manuel L. <ma...@ro...>]

Howdy,

On Wed, Jun 27, 2007 at 02:56:39PM +0200, EXTERNAL Brunner Markus (Praktikant;  ST-FIR/Eng) wrote:

> I have a question about the priority for the irqs. 
> I found that the priorities for the other CPUs, set in the setup-sh*.c
> are set as followed:
> low priority (2) for timers
> low priority (3) for sci(f) 
> high priority (7) for dma
> This doesn't make sens to me. I would give timers a high priority, so
> they keep acurate and dma a low priority. 
> 
> Are there any rules for setting the priority for interrupts? 

I guess this depends on the application the system is intended for.
I set DMABRG priority high on the SH7760 because audio needs them to
be handled as soon as possible (especially if you want to do low-latency
mixing and stuff [but that's impossible on the 7760 anyway ;-) ])

So I suggest you set priorities according to your specific needs.

	Manuel Lauss