nrf_security: drivers: cracen: support direct IRQs for bare_metal

When multithreading is not enabled, the SW ISR table is not required
and may be excluded from the build. Use direct ISRs when multithreading
is not used. This is the case for NCS-BM.

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

Author: bjarki-andreasen

subsys/nrf_security/src/drivers/cracen/sxsymcrypt/src/platform/baremetal/interrupts.c

@@ -22,12 +22,24 @@
 NRF_SECURITY_EVENT_DEFINE(cracen_irq_event_for_cryptomaster)
 NRF_SECURITY_EVENT_DEFINE(cracen_irq_event_for_pke)
 
+#if !defined(CONFIG_MULTITHREADING)
+ISR_DIRECT_DECLARE(cracen_direct_isr_handler)
+{
+	cracen_isr_handler(NULL);
+	return 0;
+}
+#endif
+
 void cracen_interrupts_init(void)
 {
 	nrf_security_event_init(cracen_irq_event_for_cryptomaster);
 	nrf_security_event_init(cracen_irq_event_for_pke);
 
+#if defined(CONFIG_MULTITHREADING)
 	IRQ_CONNECT(CRACEN_IRQn, 0, cracen_isr_handler, NULL, 0);
+#else
+	IRQ_DIRECT_CONNECT(CRACEN_IRQn, 0, cracen_direct_isr_handler, 0);
+#endif
 }
 
 #ifdef __NRF_TFM__