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Altera_Forum's avatar
Altera_Forum
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16 years ago

Nested interrupts again

Hello Linux masters, I need to make a small patch inside uClinux kernel for NIOS2. I need to enable one specific IRQ to have absolute priority over all atomic processes running in Linux - over ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

No need to do that patch?

You should assign irq number 0 in sopc builder to get highest priority. And you should set IRQF_DISABLED flag in request_irq(). Then this irq will always be processed first and won't get other lower irqs. It runs in interrupt context until it finishes. No other process will run at the same time.

- Hippo