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/mips/sgi-ip32/ip32-setup.c b/kernel/arch/mips/sgi-ip32/ip32-setup.c
new file mode 100644
index 000000000..3abd1465e
--- /dev/null
+++ b/kernel/arch/mips/sgi-ip32/ip32-setup.c
@@ -0,0 +1,102 @@
+/*
+ * IP32 basic setup
+ *
+ * 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.
+ *
+ * Copyright (C) 2000 Harald Koerfgen
+ * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets
+ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
+ */
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mc146818rtc.h>
+#include <linux/param.h>
+#include <linux/sched.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mc146818-time.h>
+#include <asm/mipsregs.h>
+#include <asm/mmu_context.h>
+#include <asm/sgialib.h>
+#include <asm/time.h>
+#include <asm/traps.h>
+#include <asm/io.h>
+#include <asm/ip32/crime.h>
+#include <asm/ip32/mace.h>
+#include <asm/ip32/ip32_ints.h>
+
+extern void ip32_be_init(void);
+extern void crime_init(void);
+
+#ifdef CONFIG_SGI_O2MACE_ETH
+/*
+ * This is taken care of in here 'cause they say using Arc later on is
+ * problematic
+ */
+extern char o2meth_eaddr[8];
+static inline unsigned char str2hexnum(unsigned char c)
+{
+	if (c >= '0' && c <= '9')
+		return c - '0';
+	if (c >= 'a' && c <= 'f')
+		return c - 'a' + 10;
+	return 0; /* foo */
+}
+
+static inline void str2eaddr(unsigned char *ea, unsigned char *str)
+{
+	int i;
+
+	for (i = 0; i < 6; i++) {
+		unsigned char num;
+
+		if(*str == ':')
+			str++;
+		num = str2hexnum(*str++) << 4;
+		num |= (str2hexnum(*str++));
+		ea[i] = num;
+	}
+}
+#endif
+
+/* An arbitrary time; this can be decreased if reliability looks good */
+#define WAIT_MS 10
+
+void __init plat_time_init(void)
+{
+	printk(KERN_INFO "Calibrating system timer... ");
+	write_c0_count(0);
+	crime->timer = 0;
+	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
+	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
+	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
+}
+
+void __init plat_mem_setup(void)
+{
+	board_be_init = ip32_be_init;
+
+#ifdef CONFIG_SGI_O2MACE_ETH
+	{
+		char *mac = ArcGetEnvironmentVariable("eaddr");
+		str2eaddr(o2meth_eaddr, mac);
+	}
+#endif
+
+#if defined(CONFIG_SERIAL_CORE_CONSOLE)
+	{
+		char* con = ArcGetEnvironmentVariable("console");
+		if (con && *con == 'd') {
+			static char options[8] __initdata;
+			char *baud = ArcGetEnvironmentVariable("dbaud");
+			if (baud)
+				strcpy(options, baud);
+			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
+					      baud ? options : NULL);
+		}
+	}
+#endif
+}