sh: Support userimask for all SH-X3 interrupt controllers.

This shuffles some of the shared bits out of the 7786 code and in to a
shared SH-X3 support file. Presently just for userimask, but also a good
place for the IRQ balancing wrappers.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 34 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 000000000000..78c971486b4e
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/intc-shx3.c
@@ -0,0 +1,34 @@
+/*
+ * Shared support for SH-X3 interrupt controllers.
+ *
+ *  Copyright (C) 2009 - 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#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);