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, 136 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-shmobile/smp-r8a7779.c b/kernel/arch/arm/mach-shmobile/smp-r8a7779.c
new file mode 100644
index 000000000..01f792fcb
--- /dev/null
+++ b/kernel/arch/arm/mach-shmobile/smp-r8a7779.c
@@ -0,0 +1,136 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile - r8a7779 portion
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+#include <asm/smp_twd.h>
+
+#include "common.h"
+#include "pm-rcar.h"
+#include "r8a7779.h"
+
+#define AVECR IOMEM(0xfe700040)
+#define R8A7779_SCU_BASE 0xf0000000
+
+static struct rcar_sysc_ch r8a7779_ch_cpu1 = {
+	.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+	.chan_bit = 1, /* ARM1 */
+	.isr_bit = 1, /* ARM1 */
+};
+
+static struct rcar_sysc_ch r8a7779_ch_cpu2 = {
+	.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+	.chan_bit = 2, /* ARM2 */
+	.isr_bit = 2, /* ARM2 */
+};
+
+static struct rcar_sysc_ch r8a7779_ch_cpu3 = {
+	.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+	.chan_bit = 3, /* ARM3 */
+	.isr_bit = 3, /* ARM3 */
+};
+
+static struct rcar_sysc_ch *r8a7779_ch_cpu[4] = {
+	[1] = &r8a7779_ch_cpu1,
+	[2] = &r8a7779_ch_cpu2,
+	[3] = &r8a7779_ch_cpu3,
+};
+
+#if defined(CONFIG_HAVE_ARM_TWD) && !defined(CONFIG_ARCH_MULTIPLATFORM)
+static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, R8A7779_SCU_BASE + 0x600, 29);
+void __init r8a7779_register_twd(void)
+{
+	twd_local_timer_register(&twd_local_timer);
+}
+#endif
+
+static int r8a7779_platform_cpu_kill(unsigned int cpu)
+{
+	struct rcar_sysc_ch *ch = NULL;
+	int ret = -EIO;
+
+	cpu = cpu_logical_map(cpu);
+
+	if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
+		ch = r8a7779_ch_cpu[cpu];
+
+	if (ch)
+		ret = rcar_sysc_power_down(ch);
+
+	return ret ? ret : 1;
+}
+
+static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	struct rcar_sysc_ch *ch = NULL;
+	unsigned int lcpu = cpu_logical_map(cpu);
+	int ret;
+
+	if (lcpu < ARRAY_SIZE(r8a7779_ch_cpu))
+		ch = r8a7779_ch_cpu[lcpu];
+
+	if (ch)
+		ret = rcar_sysc_power_up(ch);
+	else
+		ret = -EIO;
+
+	return ret;
+}
+
+static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
+{
+	/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
+	__raw_writel(__pa(shmobile_boot_vector), AVECR);
+	shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
+	shmobile_boot_arg = (unsigned long)shmobile_scu_base;
+
+	/* setup r8a7779 specific SCU bits */
+	shmobile_scu_base = IOMEM(R8A7779_SCU_BASE);
+	shmobile_smp_scu_prepare_cpus(max_cpus);
+
+	r8a7779_pm_init();
+
+	/* power off secondary CPUs */
+	r8a7779_platform_cpu_kill(1);
+	r8a7779_platform_cpu_kill(2);
+	r8a7779_platform_cpu_kill(3);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int r8a7779_cpu_kill(unsigned int cpu)
+{
+	if (shmobile_smp_scu_cpu_kill(cpu))
+		return r8a7779_platform_cpu_kill(cpu);
+
+	return 0;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+struct smp_operations r8a7779_smp_ops  __initdata = {
+	.smp_prepare_cpus	= r8a7779_smp_prepare_cpus,
+	.smp_boot_secondary	= r8a7779_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= shmobile_smp_scu_cpu_die,
+	.cpu_kill		= r8a7779_cpu_kill,
+#endif
+};