Resguardo inicial

linux-7.2.3/arch/sh/kernel/cpu/sh4a/intc-shx3.c

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Shared support for SH-X3 interrupt controllers.
+ *
+ *  Copyright (C) 2009 - 2010  Paul Mundt
+ */
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/init.h>
+
+#define INTACK		0xfe4100b8
+#define INTACKCLR	0xfe4100bc
+#define INTC_USERIMASK	0xfe411000
+
+#ifdef CONFIG_INTC_BALANCING
+unsigned int irq_lookup(unsigned int irq)
+{
+	return __raw_readl(INTACK) & 1 ? irq : NO_IRQ_IGNORE;
+}
+
+void irq_finish(unsigned int irq)
+{
+	__raw_writel(irq2evt(irq), INTACKCLR);
+}
+#endif
+
+static int __init shx3_irq_setup(void)
+{
+	return register_intc_userimask(INTC_USERIMASK);
+}
+arch_initcall(shx3_irq_setup);