+static void default_handle_irq(struct pt_regs *regs)
+{
+ panic("IRQ taken without a root IRQ handler\n");
+}
+
+static void default_handle_fiq(struct pt_regs *regs)
+{
+ panic("FIQ taken without a root FIQ handler\n");
+}
+
+void (*handle_arch_irq)(struct pt_regs *) __ro_after_init = default_handle_irq;
+void (*handle_arch_fiq)(struct pt_regs *) __ro_after_init = default_handle_fiq;
+
+int __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
+{
+ if (handle_arch_irq != default_handle_irq)
+ return -EBUSY;
+
+ handle_arch_irq = handle_irq;
+ pr_info("Root IRQ handler: %ps\n", handle_irq);
+ return 0;
+}
+
+int __init set_handle_fiq(void (*handle_fiq)(struct pt_regs *))
+{
+ if (handle_arch_fiq != default_handle_fiq)
+ return -EBUSY;
+
+ handle_arch_fiq = handle_fiq;
+ pr_info("Root FIQ handler: %ps\n", handle_fiq);
+ return 0;
+}
+