arm: Add build time consistency check for irq priority defines

We need to make sure that __NVIC_PRIO_BITS & CONFIG_NUM_IRQ_PRIO_BITS are set to the same value. Add a simple build time check to ensure this is the case. This is to catch future cases of issues like ZEP-2243. This is a stop gap til we resolve ZEP-2262, which covers use of both __NVIC_PRIO_BITS & CONFIG_NUM_IRQ_PRIO_BITS. Signed-off-by: Kumar Gala <[email protected]>
zephyrproject-rtos · Jun 9, 2017 · adce86e · adce86e
1 parent 0a8ad73
commit adce86e
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/arch/arm/cortex_m/cmsis.h b/include/arch/arm/cortex_m/cmsis.h
@@ -124,6 +124,10 @@ typedef enum {
 #define __Vendor_SysTickConfig 0 /* Default to standard SysTick */
 #endif /* __NVIC_PRIO_BITS */
 
+#if __NVIC_PRIO_BITS != CONFIG_NUM_IRQ_PRIO_BITS
+#error "CONFIG_NUM_IRQ_PRIO_BITS and __NVIC_PRIO_BITS are not set to the same value"
+#endif
+
 #if defined(CONFIG_CPU_CORTEX_M0)
 #include <core_cm0.h>
 #elif defined(CONFIG_CPU_CORTEX_M0PLUS)