Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/kernel/arch/sh/lib64/udelay.c b/kernel/arch/sh/lib64/udelay.c
new file mode 100644
index 000000000..f215b063d
--- /dev/null
+++ b/kernel/arch/sh/lib64/udelay.c
@@ -0,0 +1,49 @@
+/*
+ * arch/sh/lib64/udelay.c
+ *
+ * Delay routines, using a pre-computed "loops_per_jiffy" value.
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003, 2004  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/sched.h>
+#include <asm/param.h>
+
+/*
+ * Use only for very small delays (< 1 msec).
+ *
+ * The active part of our cycle counter is only 32-bits wide, and
+ * we're treating the difference between two marks as signed.  On
+ * a 1GHz box, that's about 2 seconds.
+ */
+
+void __delay(unsigned long loops)
+{
+	long long dummy;
+	__asm__ __volatile__("gettr	tr0, %1\n\t"
+			     "pta	$+4, tr0\n\t"
+			     "addi	%0, -1, %0\n\t"
+			     "bne	%0, r63, tr0\n\t"
+			     "ptabs	%1, tr0\n\t":"=r"(loops),
+			     "=r"(dummy)
+			     :"0"(loops));
+}
+
+void __const_udelay(unsigned long xloops)
+{
+	__delay(xloops * (HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy));
+}
+
+void __udelay(unsigned long usecs)
+{
+	__const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */
+}
+
+void __ndelay(unsigned long nsecs)
+{
+	__const_udelay(nsecs * 0x00000005);
+}