13 Mar
2012
13 Mar
'12
1:02 p.m.
Hi there,
I have a question regarding the APIC-interrupt mode settings on x86. I see that one has to set the mode externally in Fiasco.OC using the 'l4_icu_set_mode' call. Also I had a look at Nova which seems to program these modes from within the kernel, using edge/high for IRQ 0-15 and level-low for IRQ 16-23. Would that be a valid assumption to program the modes for Fiasco.OC x86 also, or is there an other way to find out the interrupt-trigger modes of IRQs (other than the ones found in ACPI-MADT)? Why is it necessary to set these modes outside the kernel?
Thanks a lot,
Sebastian