[nrf fromlist] tests: kernel: interrupt: take into account table offset during setup

Some IRQ table entries may be reserved for some architecures.
This was already introduced in dynamic shared irq tests but
it was not taken into account during test setup which may
be needed for some platforms.'

Upstream PR #: 94225

Signed-off-by: Łukasz Stępnicki <[email protected]>

Author: lstnl

tests/kernel/interrupt/src/dynamic_shared_irq.c

@@ -81,9 +81,15 @@ static unsigned int get_irq_slot(unsigned int start)
 	return TEST_INVALID_IRQ;
 }
 
+#if defined(CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET)
+#define TABLE_OFFSET CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET
+#else
+#define TABLE_OFFSET 0
+#endif
+
 static void *dynamic_shared_irq_suite_setup(void)
 {
-	fixture.irq1 = get_irq_slot(CONFIG_GEN_IRQ_START_VECTOR);
+	fixture.irq1 = get_irq_slot(CONFIG_GEN_IRQ_START_VECTOR + TABLE_OFFSET);
 	zassert_true(fixture.irq1 != TEST_INVALID_IRQ,
 		     "no suitable value found for irq1");
 	fixture.irq2 = get_irq_slot(fixture.irq1 + 1);
@@ -97,12 +103,6 @@ static void *dynamic_shared_irq_suite_setup(void)
 	return NULL;
 }
 
-#if defined(CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET)
-#define TABLE_OFFSET CONFIG_RISCV_RESERVED_IRQ_ISR_TABLES_OFFSET
-#else
-#define TABLE_OFFSET 0
-#endif
-
 static void dynamic_shared_irq_suite_before(void *data)
 {
 	ARG_UNUSED(data);