Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / kernel / swsusp.c

diff --git a/kernel/arch/powerpc/kernel/swsusp.c b/kernel/arch/powerpc/kernel/swsusp.c
new file mode 100644 (file)
index 0000000..eae33e1
--- /dev/null
+++ b/kernel/arch/powerpc/kernel/swsusp.c
@@ -0,0 +1,38 @@
+/*
+ * Common powerpc suspend code for 32 and 64 bits
+ *
+ * Copyright 2007      Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <asm/current.h>
+#include <asm/mmu_context.h>
+#include <asm/switch_to.h>
+
+void save_processor_state(void)
+{
+       /*
+        * flush out all the special registers so we don't need
+        * to save them in the snapshot
+        */
+       flush_fp_to_thread(current);
+       flush_altivec_to_thread(current);
+       flush_spe_to_thread(current);
+
+#ifdef CONFIG_PPC64
+       hard_irq_disable();
+#endif
+
+}
+
+void restore_processor_state(void)
+{
+#ifdef CONFIG_PPC32
+       switch_mmu_context(current->active_mm, current->active_mm);
+#endif
+}