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, 146 insertions, 0 deletions

diff --git a/kernel/arch/mn10300/unit-asb2305/include/unit/timex.h b/kernel/arch/mn10300/unit-asb2305/include/unit/timex.h
new file mode 100644
index 000000000..4cefc224f
--- /dev/null
+++ b/kernel/arch/mn10300/unit-asb2305/include/unit/timex.h
@@ -0,0 +1,146 @@
+/* ASB2305-specific timer specifications
+ *
+ * Copyright (C) 2007, 2010 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_UNIT_TIMEX_H
+#define _ASM_UNIT_TIMEX_H
+
+#include <asm/timer-regs.h>
+#include <unit/clock.h>
+#include <asm/param.h>
+
+/*
+ * jiffies counter specifications
+ */
+
+#define	TMJCBR_MAX		0xffff
+#define	TMJCIRQ			TM1IRQ
+#define	TMJCICR			TM1ICR
+
+#ifndef __ASSEMBLY__
+
+#define MN10300_SRC_IOCLK	MN10300_IOCLK
+
+#ifndef HZ
+# error HZ undeclared.
+#endif /* !HZ */
+/* use as little prescaling as possible to avoid losing accuracy */
+#if (MN10300_SRC_IOCLK + HZ / 2) / HZ - 1 <= TMJCBR_MAX
+# define IOCLK_PRESCALE		1
+# define JC_TIMER_CLKSRC	TM0MD_SRC_IOCLK
+# define TSC_TIMER_CLKSRC	TM4MD_SRC_IOCLK
+#elif (MN10300_SRC_IOCLK / 8 + HZ / 2) / HZ - 1 <= TMJCBR_MAX
+# define IOCLK_PRESCALE		8
+# define JC_TIMER_CLKSRC	TM0MD_SRC_IOCLK_8
+# define TSC_TIMER_CLKSRC	TM4MD_SRC_IOCLK_8
+#elif (MN10300_SRC_IOCLK / 32 + HZ / 2) / HZ - 1 <= TMJCBR_MAX
+# define IOCLK_PRESCALE		32
+# define JC_TIMER_CLKSRC	TM0MD_SRC_IOCLK_32
+# define TSC_TIMER_CLKSRC	TM4MD_SRC_IOCLK_32
+#else
+# error You lose.
+#endif
+
+#define MN10300_JCCLK		(MN10300_SRC_IOCLK / IOCLK_PRESCALE)
+#define MN10300_TSCCLK		(MN10300_SRC_IOCLK / IOCLK_PRESCALE)
+
+#define MN10300_JC_PER_HZ	((MN10300_JCCLK + HZ / 2) / HZ)
+#define MN10300_TSC_PER_HZ	((MN10300_TSCCLK + HZ / 2) / HZ)
+
+static inline void stop_jiffies_counter(void)
+{
+	u16 tmp;
+	TM01MD = JC_TIMER_CLKSRC | TM1MD_SRC_TM0CASCADE << 8;
+	tmp = TM01MD;
+}
+
+static inline void reload_jiffies_counter(u32 cnt)
+{
+	u32 tmp;
+
+	TM01BR = cnt;
+	tmp = TM01BR;
+
+	TM01MD = JC_TIMER_CLKSRC |		\
+		 TM1MD_SRC_TM0CASCADE << 8 |	\
+		 TM0MD_INIT_COUNTER |		\
+		 TM1MD_INIT_COUNTER << 8;
+
+
+	TM01MD = JC_TIMER_CLKSRC |		\
+		 TM1MD_SRC_TM0CASCADE << 8 |	\
+		 TM0MD_COUNT_ENABLE |		\
+		 TM1MD_COUNT_ENABLE << 8;
+
+	tmp = TM01MD;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+
+/*
+ * timestamp counter specifications
+ */
+
+#define	TMTSCBR_MAX		0xffffffff
+#define	TMTSCBC			TM45BC
+
+#ifndef __ASSEMBLY__
+
+static inline void startup_timestamp_counter(void)
+{
+	u32 t32;
+
+	/* set up timer 4 & 5 cascaded as a 32-bit counter to count real time
+	 * - count down from 4Gig-1 to 0 and wrap at IOCLK rate
+	 */
+	TM45BR = TMTSCBR_MAX;
+	t32 = TM45BR;
+
+	TM4MD = TSC_TIMER_CLKSRC;
+	TM4MD |= TM4MD_INIT_COUNTER;
+	TM4MD &= ~TM4MD_INIT_COUNTER;
+	TM4ICR = 0;
+	t32 = TM4ICR;
+
+	TM5MD = TM5MD_SRC_TM4CASCADE;
+	TM5MD |= TM5MD_INIT_COUNTER;
+	TM5MD &= ~TM5MD_INIT_COUNTER;
+	TM5ICR = 0;
+	t32 = TM5ICR;
+
+	TM5MD |= TM5MD_COUNT_ENABLE;
+	TM4MD |= TM4MD_COUNT_ENABLE;
+	t32 = TM5MD;
+	t32 = TM4MD;
+}
+
+static inline void shutdown_timestamp_counter(void)
+{
+	u8 t8;
+	TM4MD = 0;
+	TM5MD = 0;
+	t8 = TM4MD;
+	t8 = TM5MD;
+}
+
+/*
+ * we use a cascaded pair of 16-bit down-counting timers to count I/O
+ * clock cycles for the purposes of time keeping
+ */
+typedef unsigned long cycles_t;
+
+static inline cycles_t read_timestamp_counter(void)
+{
+	return (cycles_t)~TMTSCBC;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_UNIT_TIMEX_H */