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, 74 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-bcm/board_bcm281xx.c b/kernel/arch/arm/mach-bcm/board_bcm281xx.c
new file mode 100644
index 000000000..2e367bd7c
--- /dev/null
+++ b/kernel/arch/arm/mach-bcm/board_bcm281xx.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2012-2014 Broadcom Corporation
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clocksource.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+
+#include "kona_l2_cache.h"
+
+#define SECWDOG_OFFSET			0x00000000
+#define SECWDOG_RESERVED_MASK		0xe2000000
+#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000
+#define SECWDOG_EN_MASK			0x08000000
+#define SECWDOG_SRSTEN_MASK		0x04000000
+#define SECWDOG_CLKS_SHIFT		20
+#define SECWDOG_COUNT_SHIFT		0
+
+static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
+{
+	uint32_t val;
+	void __iomem *base;
+	struct device_node *np_wdog;
+
+	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
+	if (!np_wdog) {
+		pr_emerg("Couldn't find brcm,kona-wdt\n");
+		return;
+	}
+	base = of_iomap(np_wdog, 0);
+	if (!base) {
+		pr_emerg("Couldn't map brcm,kona-wdt\n");
+		return;
+	}
+
+	/* Enable watchdog with short timeout (244us). */
+	val = readl(base + SECWDOG_OFFSET);
+	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
+	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
+		(0x15 << SECWDOG_CLKS_SHIFT) |
+		(0x8 << SECWDOG_COUNT_SHIFT);
+	writel(val, base + SECWDOG_OFFSET);
+
+	/* Wait for reset */
+	while (1);
+}
+
+static void __init bcm281xx_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	kona_l2_cache_init();
+}
+
+static const char * const bcm281xx_dt_compat[] = {
+	"brcm,bcm11351",	/* Have to use the first number upstreamed */
+	NULL,
+};
+
+DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
+	.init_machine = bcm281xx_init,
+	.restart = bcm281xx_restart,
+	.dt_compat = bcm281xx_dt_compat,
+MACHINE_END