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, 57 insertions, 0 deletions

diff --git a/arch/sh/kernel/irq_32.c b/arch/sh/kernel/irq_32.c
new file mode 100644
index 000000000000..b98a694ead31
--- /dev/null
+++ b/arch/sh/kernel/irq_32.c
@@ -0,0 +1,57 @@
+/*
+ * SHcompact 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>
+
+void raw_local_irq_restore(unsigned long flags)
+{
+        unsigned long __dummy0, __dummy1;
+
+        if (flags == RAW_IRQ_DISABLED) {
+                __asm__ __volatile__ (
+                        "stc    sr, %0\n\t"
+                        "or     #0xf0, %0\n\t"
+                        "ldc    %0, sr\n\t"
+                        : "=&z" (__dummy0)
+                        : /* no inputs */
+                        : "memory"
+                );
+        } else {
+                __asm__ __volatile__ (
+                        "stc    sr, %0\n\t"
+                        "and    %1, %0\n\t"
+#ifdef CONFIG_CPU_HAS_SR_RB
+                        "stc    r6_bank, %1\n\t"
+                        "or     %1, %0\n\t"
+#endif
+                        "ldc    %0, sr\n\t"
+                        : "=&r" (__dummy0), "=r" (__dummy1)
+                        : "1" (~RAW_IRQ_DISABLED)
+                        : "memory"
+                );
+        }
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
+
+unsigned long __raw_local_save_flags(void)
+{
+        unsigned long flags;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "and    #0xf0, %0\n\t"
+                : "=&z" (flags)
+                : /* no inputs */
+                : "memory"
+        );
+
+        return flags;
+}
+EXPORT_SYMBOL(__raw_local_save_flags);