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, 57 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-keystone/platsmp.c b/kernel/arch/arm/mach-keystone/platsmp.c
new file mode 100644
index 000000000..5f46a7cf9
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/platsmp.c
@@ -0,0 +1,57 @@
+/*
+ * Keystone SOC SMP platform code
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ *	Cyril Chemparathy <cyril@ti.com>
+ *	Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/smp_plat.h>
+#include <asm/prom.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.h>
+
+#include "keystone.h"
+
+static int keystone_smp_boot_secondary(unsigned int cpu,
+						struct task_struct *idle)
+{
+	unsigned long start = virt_to_idmap(&secondary_startup);
+	int error;
+
+	pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
+		 cpu, start);
+
+	error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
+	if (error)
+		pr_err("CPU %d bringup failed with %d\n", cpu, error);
+
+	return error;
+}
+
+#ifdef CONFIG_ARM_LPAE
+static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{
+	pgd_t *pgd0 = pgd_offset_k(0);
+	cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
+	local_flush_tlb_all();
+}
+#else
+static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{}
+#endif
+
+struct smp_operations keystone_smp_ops __initdata = {
+	.smp_boot_secondary	= keystone_smp_boot_secondary,
+	.smp_secondary_init     = keystone_smp_secondary_initmem,
+};