sh: hibernation support

Add Suspend-to-disk / swsusp / CONFIG_HIBERNATION support
to the SuperH architecture.

To suspend, use "swapon /dev/sda2; echo disk > /sys/power/state"
To resume, pass "resume=/dev/sda2" on the kernel command line.

The patch "pm: rework includes, remove arch ifdefs V2" is
needed to allow the generic swsusp code to build properly.

Hibernation is not enabled with this patch though, a patch
setting ARCH_HIBERNATION_POSSIBLE will be submitted later.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h
new file mode 100644
index 000000000000..5d6d8aba5682
--- /dev/null
+++ b/arch/sh/include/asm/suspend.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_SH_SUSPEND_H
+#define _ASM_SH_SUSPEND_H
+
+static inline int arch_prepare_suspend(void) { return 0; }
+
+#include <asm/ptrace.h>
+
+struct swsusp_arch_regs {
+        struct pt_regs user_regs;
+        unsigned long bank1_regs[8];
+};
+
+#endif /* _ASM_SH_SUSPEND_H */