sh: Convert to asm-generic/irqflags.h.

This simplifies the irqflags support by switching over to the asm-generic
version. The necessary support functions are brought out-of-line for both
SHcompact and SHmedia instruction sets.

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

1 files changed, 51 insertions, 0 deletions

diff --git a/arch/sh/kernel/irq_64.c b/arch/sh/kernel/irq_64.c
new file mode 100644
index 000000000000..09d92718c996
--- /dev/null
+++ b/arch/sh/kernel/irq_64.c
@@ -0,0 +1,51 @@
+/*
+ * SHmedia irqflags support
+ *
+ * Copyright (C) 2006 - 2009 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/irqflags.h>
+#include <linux/module.h>
+#include <cpu/registers.h>
+
+void raw_local_irq_restore(unsigned long flags)
+{
+        unsigned long long __dummy;
+
+        if (flags == RAW_IRQ_DISABLED) {
+                __asm__ __volatile__ (
+                        "getcon " __SR ", %0\n\t"
+                        "or     %0, %1, %0\n\t"
+                        "putcon %0, " __SR "\n\t"
+                        : "=&r" (__dummy)
+                        : "r" (RAW_IRQ_DISABLED)
+                );
+        } else {
+                __asm__ __volatile__ (
+                        "getcon " __SR ", %0\n\t"
+                        "and    %0, %1, %0\n\t"
+                        "putcon %0, " __SR "\n\t"
+                        : "=&r" (__dummy)
+                        : "r" (~RAW_IRQ_DISABLED)
+                );
+        }
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
+
+unsigned long __raw_local_save_flags(void)
+{
+        unsigned long flags;
+
+        __asm__ __volatile__ (
+                "getcon " __SR ", %0\n\t"
+                "and    %0, %1, %0"
+                : "=&r" (flags)
+                : "r" (RAW_IRQ_DISABLED)
+        );
+
+        return flags;
+}
+EXPORT_SYMBOL(__raw_local_save_flags);