What version are you using? ARC support for direct interrupts was added in v2.1
(and note that Z_ARCH_IRQ_DIRECT_CONNECT was renamed to ARCH_IRQ_DIRECT_CONNECT).
From: users@... <users@...>
On Behalf Of Justin Huang
It appears to me that there is no support of 'direct ISR' by Zepher for the ARC processors: I do not see the definition of Z_ARCH_IRQ_DIRECT_CONNECT in the irq.h for ARC.
Could someone please share why it is not supported?