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, 102 insertions, 0 deletions

diff --git a/kernel/arch/m68k/sun3x/time.c b/kernel/arch/m68k/sun3x/time.c
new file mode 100644
index 000000000..c8eb08add
--- /dev/null
+++ b/kernel/arch/m68k/sun3x/time.c
@@ -0,0 +1,102 @@
+/*
+ *  linux/arch/m68k/sun3x/time.c
+ *
+ *  Sun3x-specific time handling
+ */
+
+#include <linux/types.h>
+#include <linux/kd.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/traps.h>
+#include <asm/sun3x.h>
+#include <asm/sun3ints.h>
+#include <asm/rtc.h>
+
+#include "time.h"
+
+#define M_CONTROL 0xf8
+#define M_SEC     0xf9
+#define M_MIN     0xfa
+#define M_HOUR    0xfb
+#define M_DAY     0xfc
+#define M_DATE    0xfd
+#define M_MONTH   0xfe
+#define M_YEAR    0xff
+
+#define C_WRITE   0x80
+#define C_READ    0x40
+#define C_SIGN    0x20
+#define C_CALIB   0x1f
+
+int sun3x_hwclk(int set, struct rtc_time *t)
+{
+	volatile struct mostek_dt *h =
+		(struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL);
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	if(set) {
+		h->csr |= C_WRITE;
+		h->sec = bin2bcd(t->tm_sec);
+		h->min = bin2bcd(t->tm_min);
+		h->hour = bin2bcd(t->tm_hour);
+		h->wday = bin2bcd(t->tm_wday);
+		h->mday = bin2bcd(t->tm_mday);
+		h->month = bin2bcd(t->tm_mon);
+		h->year = bin2bcd(t->tm_year);
+		h->csr &= ~C_WRITE;
+	} else {
+		h->csr |= C_READ;
+		t->tm_sec = bcd2bin(h->sec);
+		t->tm_min = bcd2bin(h->min);
+		t->tm_hour = bcd2bin(h->hour);
+		t->tm_wday = bcd2bin(h->wday);
+		t->tm_mday = bcd2bin(h->mday);
+		t->tm_mon = bcd2bin(h->month);
+		t->tm_year = bcd2bin(h->year);
+		h->csr &= ~C_READ;
+	}
+
+	local_irq_restore(flags);
+
+	return 0;
+}
+/* Not much we can do here */
+u32 sun3x_gettimeoffset(void)
+{
+    return 0L;
+}
+
+#if 0
+static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
+{
+    void (*vector)(int, void *, struct pt_regs *) = dev_id;
+
+    /* Clear the pending interrupt - pulse the enable line low */
+    disable_irq(5);
+    enable_irq(5);
+
+    vector(irq, NULL, regs);
+}
+#endif
+
+void __init sun3x_sched_init(irq_handler_t vector)
+{
+
+	sun3_disable_interrupts();
+
+
+    /* Pulse enable low to get the clock started */
+	sun3_disable_irq(5);
+	sun3_enable_irq(5);
+	sun3_enable_interrupts();
+}