arch: common: add function for updating IRQ table

This will be called by arch-specific implementations of
_arch_irq_connect_dynamic()

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>

arch/common/CMakeLists.txt

@@ -5,6 +5,7 @@ zephyr_cc_option(-ffunction-sections -fdata-sections)
 zephyr_sources_ifdef(
   CONFIG_GEN_ISR_TABLES
   isr_tables.c
+  sw_isr_common.c
   )
 
 zephyr_sources_ifdef(

arch/common/sw_isr_common.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2018 Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <sw_isr_table.h>
+#include <arch/cpu.h>
+#include <misc/__assert.h>
+/*
+ * Common code for arches that use software ISR tables (CONFIG_GEN_ISR_TABLES)
+ */
+
+#ifdef CONFIG_DYNAMIC_INTERRUPTS
+void z_isr_install(unsigned int irq, void (*routine)(void *), void *param)
+{
+	unsigned int table_idx = irq - CONFIG_GEN_IRQ_START_VECTOR;
+
+	__ASSERT(!irq_is_enabled(irq), "IRQ %d is enabled", irq);
+
+	/* If dynamic IRQs are enabled, then the _sw_isr_table is in RAM and
+	 * can be modified
+	 */
+	_sw_isr_table[table_idx].arg = param;
+	_sw_isr_table[table_idx].isr = routine;
+}
+#endif /* CONFIG_DYNAMIC_INTERRUPTS */

include/sw_isr_table.h

@@ -71,6 +71,10 @@ struct _isr_list {
 
 #define IRQ_TABLE_SIZE (CONFIG_NUM_IRQS - CONFIG_GEN_IRQ_START_VECTOR)
 
+#ifdef CONFIG_DYNAMIC_INTERRUPTS
+void z_isr_install(unsigned int irq, void (*routine)(void *), void *param);
+#endif
+
 #endif /* _ASMLANGUAGE */
 
 #ifdef __cplusplus