summaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/cpu/sh4a/intc-shx3.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/intc-shx3.c')
-rw-r--r--arch/sh/kernel/cpu/sh4a/intc-shx3.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/intc-shx3.c b/arch/sh/kernel/cpu/sh4a/intc-shx3.c
new file mode 100644
index 000000000..eea87d25e
--- /dev/null
+++ b/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);