Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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

<div class='quotetop'>QUOTE (jan @ Sep 9 2009, 06:40 PM) <{post_snapback}> (index.php?act=findpost&pid=23792)</div>

--- Quote Start ---

Hippo,

Regarding IRQF_DISABLED flag, it has no effect in uClinux distribution for NIOS. Interrupt system is here rewritten into much simple form, that do not allow nested interrupts. As a complement to my statement, IRQF_DISABLED flag is used in generic IRQ handler implemented for i386, powerpc and such platforms, but definitelly not for NIOS.[/b]

--- Quote End ---

Which nios2 uclinux distribution do you use? Did you get update? I introduced generic irq handling in 2008 May.

This the link to community supported nios2 uclinux,

http://www.nioswiki.com/installnios2linux (http://www.nioswiki.com/installnios2linux)

- Hippo